以下、本発明のエルボ用カバーを実現する形態を、図面に基づき実施例を用いて説明する。
Hereinafter, the form which implement | achieves the cover for elbows of this invention is demonstrated using an Example based on drawing.
［実施例１］
［構成］
まず、構成を説明する。図１は、本実施例のエルボ用カバー１（以下、単に「カバー１」という。）の全体斜視図である。カバー１は、断熱材（保温・保冷材）によって包囲された配管の外周を覆うように装着され（取付けられ）、その内部に収容した上記断熱材を保護する保護カバーである。すなわち、建築物や設備において水道水や温水や熱媒体油や冷媒などの流体が流通する各種配管には、その内部の流体が外部（外気）の温度変化の影響を受けないように、断熱材を配管の周囲に設置して保温することが行われている。このような断熱材は、風雨や物理的衝撃に対する耐久性が比較的低い。よって、断熱材が巻き付けられた配管をカバー１で覆うことで、カバー１の内部への水の浸入を抑制する等により断熱材を保護すると共に、断熱材の機能をより効果的に発揮させる。なお、断熱材に防水紙や保護テープを巻いた場合には、防水紙等の上からカバー１で覆うことで、防水紙等が劣化して剥がれてしまうことを回避することができる。以下、断熱材（や防水紙等）が巻き付けられた配管を、配管等７という。配管等７は略円筒状であり、その軸に対して直交する平面で切った断面形状は略円形である。
[Example 1]
[Constitution]
First, the configuration will be described. FIG. 1 is an overall perspective view of an elbow cover 1 (hereinafter simply referred to as “cover 1”) of the present embodiment. The cover 1 is a protective cover that is mounted (attached) so as to cover the outer periphery of the pipe surrounded by the heat insulating material (heat insulating / cold insulating material) and protects the heat insulating material accommodated therein. In other words, in various pipes through which fluids such as tap water, hot water, heat transfer oil, and refrigerant circulate in buildings and facilities, heat insulating materials are used so that the internal fluid is not affected by the temperature change of the outside (outside air). Is installed around the piping to keep warm. Such a heat insulating material has relatively low durability against wind and rain and physical impact. Therefore, by covering the pipe around which the heat insulating material is wound with the cover 1, the heat insulating material is protected by suppressing the intrusion of water into the cover 1, and the function of the heat insulating material is more effectively exhibited. When the waterproof paper or the protective tape is wound around the heat insulating material, the waterproof paper or the like can be prevented from being deteriorated and peeled off by covering the waterproof paper or the like with the cover 1. Hereinafter, a pipe around which a heat insulating material (or waterproof paper or the like) is wound is referred to as a pipe 7 or the like. The piping or the like 7 has a substantially cylindrical shape, and a cross-sectional shape cut by a plane orthogonal to the axis thereof is a substantially circular shape.
カバー１は板金（鈑金）製の外装材であり、鉄板、亜鉛鉄板（トタン）、ステンレス鋼板、ガルバリウム鋼板等の材料により形成されている。カバー１は、配管等７が屈曲する箇所である屈曲部（エルボ部分）を覆うためのエルボ用カバーであり、配管等７の屈曲部に大まかに倣う形状に作製され、屈曲部に倣う形状に装着される。図２は、配管等７（屈曲部）の軸を含む平面に対して直交する方向からカバー１の全体を見た図である。図３は、屈曲部の内径側からカバー１の全体を見た図である。図４は、配管等７が延び出す開口部２２の側から（２つの開口部２２が重なるように）カバー１の全体を見た図である。カバー１は、カバー本体２と係合部３を有している。カバー本体２は、配管等７の軸を取り囲む方向（以下、これを周方向という。）に沿って湾曲する曲面状に形成されている。板金製のカバー本体２は、弾性変形可能であるため、配管等７に可及的に密着させることができる。
The cover 1 is a sheet metal (plating) exterior material, and is formed of a material such as an iron plate, a galvanized iron plate (ton), a stainless steel plate, or a galvalume steel plate. The cover 1 is an elbow cover for covering a bent portion (elbow portion) where the pipe 7 or the like is bent. The cover 1 is manufactured in a shape that roughly follows the bent portion of the pipe 7 or the like, and has a shape that follows the bent portion. Installed. FIG. 2 is a view of the entire cover 1 as viewed from a direction orthogonal to a plane including the axis of the pipe 7 or the like (bent portion). FIG. 3 is a view of the entire cover 1 as viewed from the inner diameter side of the bent portion. FIG. 4 is a view of the entire cover 1 as viewed from the side of the opening 22 from which the piping or the like 7 extends (so that the two openings 22 overlap). The cover 1 has a cover body 2 and an engaging portion 3. The cover body 2 is formed in a curved surface shape that curves along a direction (hereinafter, referred to as a circumferential direction) that surrounds the axis of the pipe 7 or the like. Since the cover body 2 made of sheet metal can be elastically deformed, it can be brought into close contact with the pipe 7 or the like as much as possible.
カバー本体２は、背甲部２０と顎部２１を備えている。背甲部２０は、配管等７（屈曲部）の外径側の周面に沿うように湾曲する海老の背状であり、半円筒状の複数の短冊状の板材201〜205が、配管等７の軸方向につなぎ合わせられることにより形成されている。顎部２１は、背甲部２０から屈曲部の内径側に向って延び、屈曲部の内径側の周面に沿うように湾曲する２つの板材21a,21bにより形成されている。以下、顎部２１の面に平行であって周方向に対し直交する方向を幅方向という。板材21a,21bは、屈曲部の内径側に向かうにつれて幅方向寸法が小さくなる銀杏の葉状ないし扇状である。板材21a,21bは、屈曲部の外径側に配置される基端部がスポット溶接により背甲部２０に連結され、屈曲部の内径側に配置される先端部が周方向で互いに対向している。板材201〜205，21a,21bの連結部分にはロウ付けがなされ、隙間が生じないように設けられている。
The cover body 2 includes a back part 20 and a jaw part 21. The back 20 is a shrimp spine that curves along the outer surface of the pipe 7 or the like (bent part), and a plurality of semi-cylindrical strip plates 201 to 205 are pipes or the like. 7 are joined together in the axial direction. The jaw portion 21 is formed of two plate materials 21a and 21b that extend from the back portion 20 toward the inner diameter side of the bent portion and bend along the peripheral surface on the inner diameter side of the bent portion. Hereinafter, a direction parallel to the surface of the jaw 21 and perpendicular to the circumferential direction is referred to as a width direction. The plate members 21a and 21b are in the shape of a ginkgo leaf or fan that decreases in the width direction as it goes toward the inner diameter side of the bent portion. The plate members 21a and 21b have base end portions arranged on the outer diameter side of the bent portion connected to the back portion 20 by spot welding, and tip portions arranged on the inner diameter side of the bent portion are opposed to each other in the circumferential direction. Yes. The connecting portions of the plate members 201 to 205, 21a, and 21b are brazed so that no gap is generated.
カバー本体２は、周方向の一部が幅方向に切断された形状であり、一対の板状の端部２ａ，２ｂが周方向で対向するように配置される。端部２ａ，２ｂは、顎部２１（板材21a,21b）の先端側の部分であり、屈曲部の内径側に配置されて互いに係合される。端部２ａ，２ｂを含む顎部２１は、カバー外側（配管等７から遠ざかる側、ないし配管の径方向外側）に凸の曲面状に形成されている。配管等７への装着前（カバー１が弾性変形する前）の状態で、両端部２ａ，２ｂ（顎部２１）は、装着すべき配管等７に相当する仮想的な円筒の外周よりもカバー外側に延びるように設けられている。また、対向する両端部２ａ，２ｂの間には周方向で所定の隙間が設けられている。両端部２ａ，２ｂの互いに対向する部分の幅方向寸法は略等しく（W1に）設けられている（図５参照）。カバー１を配管等７に装着するときは、（両端部２ａ，２ｂを離間させてカバー本体２を拡開させ、配管等７をカバー本体２の内部に収容する。配管等７（屈曲部）は、その外径側が背甲部２０に位置するように、カバー本体２の内部に収容される。その後、両端部２ａ，２ｂを接近させてカバー本体２を縮閉させ、両端部２ａ，２ｂを係合させる。これにより、カバー本体２が配管等７を覆って収容した状態を維持する。カバー本体２の幅方向寸法が最小となる屈曲部の内径側に端部２ａ，２ｂを配置することで、両端部２ａ，２ｂを係合するための機構の小型化・簡素化を図ることができる。
The cover body 2 has a shape in which a part in the circumferential direction is cut in the width direction, and is arranged so that the pair of plate-like end portions 2a and 2b face each other in the circumferential direction. The end portions 2a and 2b are portions on the distal end side of the jaw portion 21 (plate materials 21a and 21b), and are disposed on the inner diameter side of the bent portion and engaged with each other. The jaw portion 21 including the end portions 2a and 2b is formed in a curved surface convex to the outside of the cover (the side away from the pipe 7 or the outside in the radial direction of the pipe). Both ends 2a, 2b (jaws 21) cover the outer circumference of the virtual cylinder corresponding to the pipe 7 to be mounted before being attached to the pipe 7 (before the cover 1 is elastically deformed). It is provided so as to extend outward. Further, a predetermined gap is provided in the circumferential direction between the opposite end portions 2a and 2b. The width direction dimensions of the opposing portions of both end portions 2a and 2b are substantially equal (to W1) (see FIG. 5). When the cover 1 is attached to the pipe 7 or the like (the two ends 2a and 2b are separated to expand the cover body 2 and the pipe 7 is accommodated inside the cover body 2. The pipe 7 (bent portion) Is accommodated inside the cover main body 2 so that the outer diameter side thereof is located on the back portion 20. Thereafter, the two ends 2a and 2b are brought close to each other to close the cover main body 2, and the two ends 2a and 2b are closed. This maintains the state in which the cover body 2 covers and accommodates the piping etc. 7. The end portions 2a and 2b are disposed on the inner diameter side of the bent portion where the dimension in the width direction of the cover body 2 is minimized. Thus, it is possible to reduce the size and simplify the mechanism for engaging the both end portions 2a and 2b.
カバー１は、両端部２ａ，２ｂを係合するための機構（係合部３）として、一方の端部２ａの延長部分を折り曲げて溝４を形成し、この溝４内に他方の端部２ｂの延長部分を差し込んで係止させる、所謂雄雌構造を採用している。以下、溝４が形成される側の上記一方の端部２ａを雌側端部といい、上記他方の端部２ｂを雄側端部という。雌側端部２ａに雌側係合部３ａが設けられると共に、雄側端部２ｂに雄側係合部３ｂが設けられている。図５は、カバー１に対して配管等７の側、すなわちカバー１の内側から両係合部３ａ，３ｂを見た図である。図６は、配管等７（屈曲部）の軸に対し直交する平面で両係合部３ａ，３ｂを切った断面図であり、図５のI-I視断面を示す。図７は、雌側係合部３ａの断面図であり、図５のII-II視断面を示す。配管等７を併せて示す。図８は、カバー１の開口部２２の側から、係合した状態の両係合部３ａ，３ｂを見た図である。
The cover 1 serves as a mechanism (engagement portion 3) for engaging both end portions 2a and 2b to bend an extension portion of one end portion 2a to form a groove 4, and the other end portion in the groove 4 is formed. A so-called male-female structure is adopted in which the extension portion 2b is inserted and locked. Hereinafter, the one end 2a on the side where the groove 4 is formed is referred to as a female end, and the other end 2b is referred to as a male end. A female side engaging portion 3a is provided at the female side end portion 2a, and a male side engaging portion 3b is provided at the male side end portion 2b. FIG. 5 is a view of the engagement portions 3 a and 3 b as viewed from the side of the pipe 7 or the like with respect to the cover 1, i. 6 is a cross-sectional view in which both engaging portions 3a and 3b are cut along a plane orthogonal to the axis of the pipe 7 or the like (bent portion), and shows a cross section taken along line II in FIG. FIG. 7 is a cross-sectional view of the female side engaging portion 3a, and shows a cross section taken along the line II-II of FIG. The piping 7 is also shown. FIG. 8 is a view of the engaging portions 3 a and 3 b in an engaged state from the opening 22 side of the cover 1.
雌側係合部３ａは、板状片３１〜３３と溝４と雌側突起５とを有している。第１板状片３１は、雌側端部２ａに連続して雌側端部２ａから周方向に延長された板状部分が雌側端部２ａに対向するように折り返されることで形成されており、上記折り返された部位から周方向一方側に延びる。第１板状片３１は、雌側端部２ａに対しカバー内側（配管等７の側）へ折り返されている。これにより、雌側係合部３ａが雌側端部２ａの内側に配置される。図５に示すように、第１板状片３１における周方向他方側で雌側端部２ａと連続する接続部分（折り返し部位）の幅方向寸法は、雌側端部２ａの周方向他方側の先端部位の幅方向寸法W1と略等しい。第１板状片３１の幅方向寸法は、雌側端部２ａとの接続部分から周方向一方側に向うにつれて徐々に小さくなり、周方向一方側の端部でW1より若干小さいW2となる。
The female side engaging portion 3 a has plate-like pieces 31 to 33, a groove 4, and a female side protrusion 5. The first plate-like piece 31 is formed by folding back so that a plate-like portion extending in the circumferential direction from the female-side end 2a is continuous with the female-side end 2a so as to face the female-side end 2a. And extends from the folded portion to one side in the circumferential direction. The first plate-like piece 31 is folded back to the inner side of the cover (the side of the pipe 7 or the like) with respect to the female end 2a. Thereby, the female side engaging part 3a is arrange | positioned inside the female side edge part 2a. As shown in FIG. 5, the width direction dimension of the connection part (folding part) which continues to the female end part 2a on the other circumferential side of the first plate-like piece 31 is the same as that on the other circumferential side of the female end part 2a. It is substantially equal to the width direction dimension W1 of the tip part. The widthwise dimension of the first plate-like piece 31 gradually decreases from the connecting portion with the female end 2a toward the one side in the circumferential direction, and becomes W2 slightly smaller than W1 at the end on the one side in the circumferential direction.
第２板状片３２は、第１板状片３１に連続して第１板状片３１から周方向に延長された板状部分が、第１板状片３１に対向するように、第１板状片３１を挟んで雌側端部２ａとは反対側（カバー内側）へ折り返されることで形成されており、折り返された部位から周方向他方側に延びる。図５に示すように、上記延長された板状部分（第２板状片３２）の幅方向寸法は、第１板状片３１の周方向一方側の上記端部の幅方向寸法W2よりも小さいW3に設けられている。なお、第１板状片３１には、周方向一方側の上記端部であって幅方向両端縁と第２板状片３２との間の角部に、テーパ状の切り欠き310が設けられている。第２板状片３２の折り返し部位は、第１板状片３１の周方向一方側の上記端部から周方向一方側に若干の距離をおいた位置にある。第２板状片３２には、上記折り返し部位に周方向他方側で隣接する部位に湾曲部320が設けられている。図６に示すように、湾曲部320は、上記折り返し部位から周方向他方側に向かうにつれて、第１板状片３１との間の距離が徐々に大きくなった後、上記距離が徐々に小さくなるS字状に形成されている。
The second plate-like piece 32 is first so that a plate-like portion that is continuous with the first plate-like piece 31 and extends in the circumferential direction from the first plate-like piece 31 faces the first plate-like piece 31. It is formed by being folded back to the side opposite the female end 2a (inside the cover) across the plate-like piece 31, and extends from the folded portion to the other side in the circumferential direction. As shown in FIG. 5, the width dimension of the extended plate-like portion (second plate-like piece 32) is larger than the width-direction dimension W2 of the end portion on one side in the circumferential direction of the first plate-like piece 31. Provided in small W3. Note that the first plate-like piece 31 is provided with a tapered notch 310 at the end portion on one side in the circumferential direction between the both edges in the width direction and the second plate-like piece 32. ing. The folded portion of the second plate-like piece 32 is located at a distance from the end portion on one side in the circumferential direction of the first plate-like piece 31 to one side in the circumferential direction. The second plate-like piece 32 is provided with a curved portion 320 at a portion adjacent to the folded portion on the other side in the circumferential direction. As shown in FIG. 6, the distance between the bending portion 320 and the first plate-shaped piece 31 gradually increases from the folded portion toward the other side in the circumferential direction, and then the distance gradually decreases. It is formed in an S shape.
第２板状片３２の周方向他方側の端部が小さく折り返されることで第３板状片３３が形成されている。第３板状片３３は、第２板状片３２に連続して第２板状片３２から周方向に延長された板状部分が、第２板状片３２に対向するように、第２板状片３２を挟んで第１板状片３１とは反対側へ折り返されることで形成されており、折り返された部位から周方向一方側に延びる。図５に示すように、第３板状片３３の幅方向寸法は、第２板状片３２の幅方向寸法W3と略等しい。第３板状片３３の上記折り返し部位は、第１板状片３１の雌側端部２ａとの接続部分（折り返し部位）から周方向一方側に若干の距離をおいた位置にある。雌側係合部３ａ（第１板状片３１、第２板状片３２）および雌側端部２ａにはアールが付けられており、これらはカバー外側に向って凸の曲面状に形成されている。
The third plate-like piece 33 is formed by folding the end portion on the other circumferential side of the second plate-like piece 32 small. The third plate-like piece 33 is formed so that a plate-like portion that is continuous with the second plate-like piece 32 and extends in the circumferential direction from the second plate-like piece 32 faces the second plate-like piece 32. It is formed by being folded back to the opposite side to the first plate-like piece 31 with the plate-like piece 32 interposed therebetween, and extends from the folded portion to one side in the circumferential direction. As shown in FIG. 5, the widthwise dimension of the third plate-like piece 33 is substantially equal to the widthwise dimension W3 of the second plate-like piece 32. The folded portion of the third plate-like piece 33 is located at a distance from the connecting portion (folded portion) of the first plate-like piece 31 with the female side end 2a to one side in the circumferential direction. The female side engaging portion 3a (the first plate-like piece 31, the second plate-like piece 32) and the female-side end portion 2a are rounded, and these are formed in a convex curved shape toward the outside of the cover. ing.
溝４は、対面する第１板状片３１と第２板状片３２との間の隙間（スリット）である。第１板状片３１と第２板状片３２との接続部分（折り返し部位）が溝４の底部４０を構成している。底部４０は閉じられており、穴等が設けられていない。第１板状片３１と雌側端部２ａとの接続部分（折り返し部位）の側で溝４が開口し、開口部４１を構成している。雌側突起５は係合受歯であり、第２板状片３２に複数設けられている。雌側突起５は、第２板状片３２の面内から溝４内に突出する凸形状である。図５〜図７に示すように、雌側突起５は、第２板状片３２がその面内で局所的に幅方向に延びる切れ目（切り込み）500を付けられ、この切れ目500に周方向他方側で隣接する部分が溝４内（カバー外側）に持ち上げられ（押し出され）ることで、形成されている。雌側突起５は、溝４の底部４０に向って開口するポケット状（ドーム状）に形成されている。
The groove 4 is a gap (slit) between the first plate-like piece 31 and the second plate-like piece 32 facing each other. A connecting portion (folded portion) between the first plate-like piece 31 and the second plate-like piece 32 constitutes the bottom portion 40 of the groove 4. The bottom 40 is closed and no hole or the like is provided. The groove 4 is opened on the side of the connection portion (folded portion) between the first plate-shaped piece 31 and the female-side end portion 2 a to form an opening 41. The female projections 5 are engagement teeth, and a plurality of the female projections 5 are provided on the second plate-like piece 32. The female-side protrusion 5 has a convex shape that protrudes into the groove 4 from the surface of the second plate-like piece 32. As shown in FIG. 5 to FIG. 7, the female projection 5 is provided with a cut (notch) 500 in which the second plate-like piece 32 extends in the width direction locally in the plane, and the other end in the circumferential direction is provided in the cut 500. A portion adjacent on the side is formed by being lifted (extruded) into the groove 4 (outside of the cover). The female projection 5 is formed in a pocket shape (dome shape) that opens toward the bottom 40 of the groove 4.
雌側突起５は、後背部501と当接面502を備えている。後背部501は、第２板状片３２の面内から溝４内に突出しつつ周方向に延びるドーム状の部分であり、周方向一方側で開口し周方向他方側が閉じられている。後背部501は、その開口部から周方向他方側に向かうにつれて徐々に第２板状片３２からの高さが低くなり、周方向他方側の端で第２板状片３２と一体化する。後背部501は、その幅方向中央から幅方向両側に向かうにつれて徐々に上記高さが低くなり、幅方向両端で第２板状片３２と一体化する。当接面502は、後背部501の開口部を縁取る端面（端縁）であり、周方向で溝４の底部４０に対向する（周方向一方側に面する）。図７に示すように、当接面502は、幅方向における両端部503と、両端部503に連続する中間部504とを有している。中間部504は両端部503よりも溝４内に突出している。このように、雌側突起５は、第２板状片３２の一部分を、その厚さが第２板状片３２とあまり変わらない状態で、幅方向における両端が（突出元となる）第２板状片３２の面に連続すると共に溝４内に突出する山形に変形させることで、形成されている。
The female projection 5 includes a back portion 501 and a contact surface 502. The back portion 501 is a dome-shaped portion that extends in the circumferential direction while projecting into the groove 4 from the plane of the second plate-like piece 32, and is open on one side in the circumferential direction and closed on the other side in the circumferential direction. The back portion 501 gradually decreases in height from the second plate-like piece 32 from the opening toward the other side in the circumferential direction, and is integrated with the second plate-like piece 32 at the end on the other side in the circumferential direction. The rear portion 501 gradually decreases in height from the center in the width direction toward both sides in the width direction, and is integrated with the second plate-like piece 32 at both ends in the width direction. The contact surface 502 is an end surface (end edge) that borders the opening of the back portion 501 and faces the bottom 40 of the groove 4 in the circumferential direction (facing to one side in the circumferential direction). As shown in FIG. 7, the contact surface 502 has both end portions 503 in the width direction and an intermediate portion 504 continuous with the both end portions 503. The intermediate portion 504 protrudes into the groove 4 from both end portions 503. In this way, the female projection 5 is a second part of the second plate-like piece 32, with the thickness not much different from that of the second plate-like piece 32, and both ends in the width direction (to be the projection source). It is formed by being deformed into a mountain shape that continues to the surface of the plate-like piece 32 and protrudes into the groove 4.
雌側突起５は、第２板状片３２の面内に複数、周方向に（溝４の開口部４１の側から底部４０の側に向って）並んで設けられている。すなわち、係合受歯が複数段、形成されている。図５に示すように、これらの雌側突起５は、千鳥状に（斜めに互い違いに入り交じって）配置されている。周方向に並ぶ４つの雌側突起5m1〜5m4からなる列が５つ（mは列を表す自然数１〜５）、幅方向に並んでいる。隣り合う列は、雌側突起５の略１つ分ずつ周方向で互い違いにずれている。雌側突起５は、周方向から見たとき、幅方向に並んで５つ設けられている。また、幅方向に並ぶ３つの雌側突起51n,53n,55nからなる段と、幅方向に並ぶ２つの雌側突起52n,54nからなる段とがそれぞれ４つ（nは段を表す自然数１〜４）、周方向に交互に並んでいる。３つの雌側突起51n,53n,55nからなる段における隣接する２つの雌側突起５の略中間に、周方向で隣接する（２つの雌側突起52n,54nからなる）段の各雌側突起５がそれぞれ位置する。図８に示すように、雌側突起５は、幅方向から見たとき、周方向に並んで８つ（８段）設けられている。
A plurality of the female-side protrusions 5 are provided side by side in the circumferential direction (from the opening 41 side of the groove 4 toward the bottom 40 side) in the surface of the second plate-like piece 32. That is, a plurality of engagement teeth are formed. As shown in FIG. 5, these female side protrusions 5 are arranged in a staggered manner (obliquely staggered). There are five rows (m is a natural number 1 to 5 representing a row) of four female side protrusions 5m1 to 5m4 arranged in the circumferential direction, and are arranged in the width direction. Adjacent rows are staggered in the circumferential direction by approximately one of the female projections 5. When viewed from the circumferential direction, five female side protrusions 5 are provided side by side in the width direction. Each of the four stages includes three female-side protrusions 51n, 53n, and 55n arranged in the width direction and four stages that include two female-side protrusions 52n and 54n arranged in the width direction (n is a natural number 1 to 1 representing the stage). 4) They are arranged alternately in the circumferential direction. Each female-side projection in the step (consisting of two female-side projections 52n, 54n) that is adjacent in the circumferential direction substantially in the middle of two adjacent female-side projections 5 in the step consisting of three female-side projections 51n, 53n, 55n 5 is located respectively. As shown in FIG. 8, when viewed from the width direction, the female-side protrusions 5 are provided in eight (eight steps) side by side in the circumferential direction.
雌側係合部３ａを作製する方法の一例としては、板材21aの先端側を雌側係合部３ａ（第１〜第３板状片３１〜３３）に必要な長さだけ延長し、適宜成形したものを用意しておく。まず、第３板状片３３を折り返す。この状態で、第２板状片３２となることが予定されている部位（第２板状片３２に相当する部位）に、工具や機械を用いてパンチやプレス加工を施すことによって、複数の雌側突起５を切り起こし（抜き起こし）形成する。上記工具や機械は、第２板状片３２（に相当する部位）を両面から挟み込んで切れ目500を入れる歯と、切れ目500に隣接する部分を面の片側一方へ押圧して持ち上げる突起とを有する。その後、第１板状片３１と第２板状片３２を折り返すことで溝４を形成する。そして、例えばプレス加工を施すことによって、雌側係合部３ａ（第１板状片３１、第２板状片３２）およびこれに対向する雌側端部２ａを含む板材21a（顎部２１）にアール形状を付け、これらをカバー外側に凸の曲面状に形成する。なお、図５に示すように、第３板状片３３に重なって雌側突起５を形成することは妨げられない。また、第３板状片３３を折り返す前に雌側突起５を形成してもよい。
As an example of a method for producing the female side engaging portion 3a, the front end side of the plate material 21a is extended by a length necessary for the female side engaging portion 3a (first to third plate-like pieces 31 to 33), and appropriately. Prepare a molded one. First, the third plate-like piece 33 is folded back. In this state, by punching or pressing a part (part corresponding to the second plate-like piece 32) that is planned to become the second plate-like piece 32 using a tool or a machine, a plurality of pieces are obtained. The female protrusion 5 is cut and raised (pulled and raised). The tool or machine has a tooth for inserting the cut 500 by sandwiching the second plate-like piece 32 (corresponding portion) from both sides, and a protrusion that presses and lifts a portion adjacent to the cut 500 to one side of the surface. . Thereafter, the groove 4 is formed by folding back the first plate-like piece 31 and the second plate-like piece 32. Then, for example, by pressing, a plate member 21a (jaw portion 21) including the female engagement portion 3a (first plate-like piece 31, second plate-like piece 32) and the female-side end portion 2a facing the female engagement portion 3a (first plate-like piece 31, second plate-like piece 32). Are rounded and formed into a convex curved shape on the outside of the cover. As shown in FIG. 5, it is not hindered to form the female projection 5 so as to overlap the third plate-like piece 33. Further, the female projection 5 may be formed before the third plate-like piece 33 is folded back.
雄側係合部３ｂは、雄側係合片３０と雄側突起６を有している。雄側係合片３０は、雄側端部２ｂに連続して雄側端部２ｂから（雄側端部２ｂと同様に）周方向一方側に延びるように延長された板状部分であって、溝４内に挿入される（差し込まれる）。雄側係合片３０および雄側端部２ｂを含む板材21b（顎部２１）は、ローラによってアールが付けられており、カバー外側に凸の曲面状に形成されている。雄側係合片３０の周方向一方側の端部が小さく折り返されることで雄側突起６が形成されている。雄側突起６は係合歯であり、雄側係合片３０が溝４内から抜き取られる方向（周方向他方側）で雌側突起５に当接可能に設けられている。すなわち、雄側突起６および雌側突起５は、両係合部３ａ，３ｂが互いに離隔する方向へ移動するに際し、互いに当接して係止する当接部である。
The male side engaging portion 3 b has a male side engaging piece 30 and a male side protrusion 6. The male side engagement piece 30 is a plate-like portion extended so as to extend from the male side end 2b to the one side in the circumferential direction (similar to the male side end 2b) continuously to the male side end 2b. , Inserted into the groove 4 (inserted). The plate 21b (jaw portion 21) including the male engagement piece 30 and the male end 2b is rounded by a roller, and is formed in a convex curved shape on the outside of the cover. The male-side protrusion 6 is formed by folding back one end of the male-side engagement piece 30 in the circumferential direction. The male projection 6 is an engagement tooth, and is provided so as to be able to contact the female projection 5 in the direction in which the male engagement piece 30 is extracted from the groove 4 (the other side in the circumferential direction). That is, the male-side protrusion 6 and the female-side protrusion 5 are contact portions that are brought into contact with each other and locked when the engaging portions 3a and 3b move in a direction away from each other.
雄側突起６は、基端部６０と突起部６１を有している。基端部６０は、雄側係合片３０に連続して雄側係合片３０から周方向に延長された板状部分が、雄側係合片３０に対向するように、雄側係合片３０に対しカバー内側すなわち配管等７の側へ折り返されることで、形成されている。基端部６０は、上記折り返された部位から（カバー外側へ向って）雄側係合片３０に近づくように、周方向他方側に延びる。基端部６０は、雄側係合部３ｂの先端側の幅方向全範囲にわたって設けられている。基端部６０の幅方向寸法は、雄側端部２ｂの周方向一方側の先端部位の幅方向寸法W1と略等しい。
The male projection 6 has a base end 60 and a projection 61. The base end portion 60 is engaged with the male side engagement piece 30 such that a plate-like portion that is continuous with the male side engagement piece 30 and extends in the circumferential direction from the male side engagement piece 30 faces the male side engagement piece 30. The strip 30 is formed by being folded back toward the inside of the cover, that is, the pipe 7 or the like. The base end portion 60 extends to the other side in the circumferential direction so as to approach the male engagement piece 30 (toward the outside of the cover) from the folded portion. The base end portion 60 is provided over the entire range in the width direction on the distal end side of the male side engaging portion 3b. The width direction dimension of the base end portion 60 is substantially equal to the width direction dimension W1 of the distal end portion on one side in the circumferential direction of the male end portion 2b.
突起部６１は、基端部６０に連続して基端部６０から周方向に延長された板状部分が、基端部６０に対し雄側係合片３０とは反対の側へ折り曲げられることで、幅方向に延びる直線状に形成されている。突起部６１は、上記折り曲げられた部位から（カバー内側へ向って）雄側係合片３０から遠ざかるように、周方向他方側に延びる。上記延長された板状部分（突起部６１）の幅方向寸法は、雌側突起５の当接面502の幅方向寸法よりも大きく、基端部６０の幅方向寸法W1よりも小さく、第２板状片３２の幅方向寸法と略等しいW3に設けられている。突起部６１の幅方向寸法W3は、第１板状片３１の幅方向寸法W1〜W2よりも小さい。突起部６１は、幅方向で第２板状片３２の幅方向全範囲と略重なるように設けられている。
In the protrusion 61, a plate-like portion that is continuous with the base end portion 60 and extends from the base end portion 60 in the circumferential direction is bent toward the side opposite to the male engagement piece 30 with respect to the base end portion 60. Thus, it is formed in a straight line extending in the width direction. The protrusion 61 extends to the other side in the circumferential direction so as to be away from the male side engaging piece 30 (toward the inside of the cover) from the bent portion. The width direction dimension of the extended plate-like portion (projection part 61) is larger than the width direction dimension of the contact surface 502 of the female-side protrusion 5, and smaller than the width direction dimension W1 of the base end part 60, It is provided at W3 which is substantially equal to the dimension in the width direction of the plate-like piece 32. The width direction dimension W3 of the protrusion 61 is smaller than the width direction dimensions W1 to W2 of the first plate-like piece 31. The protrusion 61 is provided so as to substantially overlap the entire range in the width direction of the second plate-like piece 32 in the width direction.
幅方向から見て周方向に並ぶ８つの雌側突起５の略中間位置で雄側突起６が係合したとき（具体的には周方向他方側から数えて４段目の雌側突起５の当接面502に雄側突起６の突起部６１が突き当たったとき）のカバー本体２の寸法が、装着すべき配管等７の寸法に適合するように、折り返し前の板材21a，21b等の寸法が設計され、カバー１が作製される。また、配管等７への装着前（カバー１が弾性変形する前）の状態で、雄側係合部３ｂの周方向先端が、雌側係合部３ａの溝４の開口部４１の近傍に位置するように、望ましくは開口部４１に周方向で対向するように、位置関係が調整される。
When the male projection 6 is engaged at approximately the middle position of the eight female projections 5 arranged in the circumferential direction as viewed from the width direction (specifically, the fourth projection of the female projection 5 at the fourth stage counting from the other circumferential side). The dimensions of the plate materials 21a, 21b, etc. before turning back so that the dimensions of the cover body 2 (when the projection 61 of the male projection 6 abuts against the abutment surface 502) match the dimensions of the piping 7 to be mounted. Is designed, and the cover 1 is manufactured. Further, in a state before being attached to the pipe 7 or the like (before the cover 1 is elastically deformed), the circumferential end of the male side engaging portion 3b is in the vicinity of the opening 41 of the groove 4 of the female side engaging portion 3a. The positional relationship is adjusted so that it preferably faces the opening 41 in the circumferential direction.
［作用］
次に、作用を説明する。
（顎部２１の形状による作用）
雌側係合部３ａの溝４内へ雄側係合部３ｂが挿入されると、雄側突起６（の突起部６１）が雌側突起５の後背部501を通過するのに伴って溝４が弾性的に若干拡開し、通過後には弾性力により溝４が縮閉する。雄側突起６（の突起部６１）が後背部501を乗り越えた状態でこの雌側突起５の当接面502に当接することにより、両突起５，６が係合する。すなわち、顎部２１は、外力や自身の弾性力等により、その先端部（端部２ａ，２ｂ）がカバー外側へ拡開し、離間しようとする。これにより雌側係合部３ａの溝４内から雄側係合部３ｂが引き抜かれる方向へ移動しようとする。その際、周方向に並ぶ雌側突起５（の当接面502）のいずれかに雄側突起６（の突起部６１）が突き当たると、上記移動が制限され、両係合部３ａ，３ｂの係合状態が維持される。このように所謂雄雌構造の係合部３を採用したことにより、装着作業がワンタッチで済み、簡単な作業で比較的強固に両端部２ａ，２ｂを係合させることができるため、施工性を向上することができる。
[Action]
Next, the operation will be described.
(Operation by the shape of the jaw 21)
When the male side engaging part 3b is inserted into the groove 4 of the female side engaging part 3a, the male side protrusion 6 (the protruding part 61) passes through the back part 501 of the female side protrusion 5 and the groove 4 slightly expands elastically, and after passing, the groove 4 is closed and closed by the elastic force. When the male projection 6 (the projection 61 thereof) has come over the rear portion 501 and abuts against the abutment surface 502 of the female projection 5, the projections 5 and 6 are engaged. That is, the jaw portion 21 tends to be separated by the distal end portion (end portions 2a, 2b) expanding to the outside of the cover by an external force or its own elastic force. Thereby, it tries to move in the direction in which the male side engaging part 3b is pulled out from the groove 4 of the female side engaging part 3a. At that time, when the male projection 6 (projection portion 61) hits one of the female projections 5 (contact surface 502) aligned in the circumferential direction, the movement is restricted, and the engagement portions 3a and 3b are moved. The engaged state is maintained. By adopting the so-called male-female engaging portion 3 in this way, the mounting work can be done with a single touch, and both ends 2a, 2b can be engaged relatively easily with a simple work. Can be improved.
端部２ａ，２ｂを含む顎部２１は、カバー外側に凸の曲面状に湾曲形成されている。よって、顎部２１が、例えば平面状である場合に比べ、装着前から配管等７に大まかに倣う形状となっているため、配管等７をカバー本体２の内部に収容した後、両端部２ａ，２ｂを接近させて係合させる作業を容易化でき、より容易にカバー本体２と配管等７との密着度を向上することができる。また、配管等７への装着前の状態で、カバー１の両端部２ａ，２ｂ（顎部２１）は、装着すべき配管等７に相当する仮想的な円筒の外周よりもカバー外側に延びるように設けられている。よって、端部２ａ，２ｂを含む顎部２１に付けるべきアールの曲率を比較的小さくして作製を容易化できる。また、両端部２ａ，２ｂが上記円筒の外周よりもカバー内側に延びている場合に比べ、両端部２ａ，２ｂを離間させてカバー本体２を拡開させる量や力を低減できるため、配管等７へカバー１を装着する作業を容易化できる。
The jaw portion 21 including the end portions 2a and 2b is curved and formed in a convex curved shape on the outside of the cover. Therefore, compared with the case where the jaw portion 21 is flat, for example, the jaw portion 21 has a shape that roughly follows the piping etc. 7 before mounting. , 2b can be made closer to each other and engaged, and the degree of adhesion between the cover body 2 and the piping 7 can be more easily improved. Moreover, both ends 2a and 2b (jaw part 21) of the cover 1 extend beyond the outer periphery of the virtual cylinder corresponding to the pipe 7 to be attached before being attached to the pipe 7 or the like. Is provided. Therefore, the curvature of the radius which should be attached to the jaw part 21 including the ends 2a and 2b can be made relatively small to facilitate the production. Further, compared to the case where both end portions 2a and 2b extend to the inside of the cover from the outer periphery of the cylinder, the amount and force for expanding the cover body 2 by separating the both end portions 2a and 2b can be reduced. The work of attaching the cover 1 to 7 can be facilitated.
また、カバー１が弾性変形する前の状態で、対向する両端部２ａ，２ｂの間には周方向で所定の隙間が設けられている。よって、上記状態で両端部２ａ，２ｂが周方向で互いに重なっていた場合に比べ、配管等７をカバー本体２の内部に収容した後、両端部２ａ，２ｂを係合させる際、両端部２ａ，２ｂを周方向でいったん離間させてから接近させる必要がなく、（元々周方向で離間している）両端部２ａ，２ｂを接近させるだけでよいため、係合作業を容易化できる。また、カバー１が弾性変形する前の状態で、雄側係合部３ｂの周方向先端が雌側係合部３ａの溝４の開口部４１の近傍に位置する（望ましくは開口部４１に周方向で対向する）ように調整されている。よって、雄側係合部３ｂを溝４内へ挿入するのに適当な角度を維持することが可能であるため、両係合部３ａ，３ｂを係合させる作業をより容易化できる。
Further, in a state before the cover 1 is elastically deformed, a predetermined gap is provided in the circumferential direction between the opposite end portions 2a and 2b. Therefore, compared with the case where both ends 2a and 2b overlap each other in the above state in the above state, both ends 2a and 2b are engaged when both ends 2a and 2b are engaged after the pipe 7 is accommodated inside the cover body 2. , 2b need not be separated from each other in the circumferential direction and then approached, and it is only necessary to bring both end portions 2a and 2b (which are originally separated in the circumferential direction) close to each other. Further, in the state before the cover 1 is elastically deformed, the circumferential tip of the male side engaging portion 3b is positioned in the vicinity of the opening 41 of the groove 4 of the female side engaging portion 3a (desirably around the opening 41). In the direction). Therefore, since it is possible to maintain an appropriate angle for inserting the male side engaging portion 3b into the groove 4, the operation of engaging both the engaging portions 3a and 3b can be facilitated.
配管等７への装着前の状態で、両端部２ａ，２ｂ（顎部２１）が上記円筒の外周よりもカバー外側に延びるように設けられているため、両係合部３ａ，３ｂが係合する際、または係合した状態で、顎部２１はその弾性力によりカバー外側へ広がろうとする。これに対し、上記のように両突起５，６が突き当たることで、両係合部３ａ，３ｂの係合状態が維持される。一方、両係合部３ａ，３ｂを係合させる際、または係合させた後、カバー１に作用する外力（風による振動等）や、カバー１自身の弾性力や、寒暖差によるカバー１の膨張・縮小等により、溝４の幅（第１板状片３１と第２板状片３２との間の距離）を広げる力が雌側係合部３ａに作用し、溝４の幅が広がるように雌側係合部３ａが変形する場合がある。
Since both end portions 2a and 2b (jaw portion 21) are provided so as to extend to the outside of the cover from the outer periphery of the cylinder in a state before being attached to the pipe 7 or the like, both engaging portions 3a and 3b are engaged. In this case, or in an engaged state, the jaw portion 21 tends to spread to the outside of the cover due to its elastic force. On the other hand, the engaging state of both the engaging portions 3a and 3b is maintained by the contact of the two protrusions 5 and 6 as described above. On the other hand, when the engaging portions 3a and 3b are engaged, or after the engaging portions 3a and 3b are engaged, the external force (vibration caused by wind, etc.) acting on the cover 1, the elastic force of the cover 1 itself, and the cover 1 due to a difference in temperature. A force for expanding the width of the groove 4 (distance between the first plate-like piece 31 and the second plate-like piece 32) acts on the female side engaging portion 3a due to expansion / reduction, etc., and the width of the groove 4 is increased. Thus, the female side engaging part 3a may be deformed.
すなわち、カバー本体２の一方の端部２ａに連続する板状部分を繰り返し折り返すだけで雌側係合部３ａ（第１板状片３１、第２板状片３２、溝４）を形成することができる。よって、係合部３を容易に作製することができる。この場合、溝４を構成する第１板状片３１と第２板状片３２のうち、溝４の開口側における第１板状片３１の端部はカバー本体２（雌側端部２ａ）に接続された固定端となっているのに対し、溝４の開口側における第２板状片３２の端部はカバー本体２（雌側端部２ａ）に接続されない自由端となっている。よって、第１板状片３１と第２板状片３２のうち主に第２板状片３２に入力される力が、溝４の幅を広げる方向に作用する。第２板状片３２には雄側係合部３ｂを介して力が作用する。外力やカバー１自身の弾性力等により雄側係合部３ｂを介して第２板状片３２に力が作用した場合、この力のうち溝４の幅を広げる方向の成分により雌側係合部３ａが弾性変形または塑性変形すると、溝４の幅が広がる。
That is, the female side engaging portion 3a (the first plate-like piece 31, the second plate-like piece 32, and the groove 4) is formed simply by repeatedly turning back the plate-like portion continuous with the one end 2a of the cover body 2. Can do. Therefore, the engaging part 3 can be produced easily. In this case, of the first plate-like piece 31 and the second plate-like piece 32 constituting the groove 4, the end portion of the first plate-like piece 31 on the opening side of the groove 4 is the cover body 2 (female-side end portion 2a). The end of the second plate-like piece 32 on the opening side of the groove 4 is a free end that is not connected to the cover body 2 (female side end 2a). Therefore, the force mainly input to the second plate-like piece 32 out of the first plate-like piece 31 and the second plate-like piece 32 acts in the direction of increasing the width of the groove 4. A force acts on the second plate-like piece 32 via the male side engaging portion 3b. When a force acts on the second plate-like piece 32 through the male side engaging portion 3b due to an external force or the elastic force of the cover 1 itself, the female side engagement is caused by a component of the force in the direction of widening the groove 4. When the portion 3a is elastically deformed or plastically deformed, the width of the groove 4 increases.
上記のように、端部２ａ，２ｂを含む顎部２１は、カバー外側に凸の曲面状に形成されている。このため、端部２ａ，２ｂがカバー外側へ拡開し、離間しようとする力が低減される。よって、雄側係合部３ｂが溝４内から引き抜かれる方向へ移動しようとする力や、溝４の幅を広げようとする力を低減することができる。これにより雄側係合部３ｂ（雄側突起６）と雌側係合部３ａ（雌側突起５）との係合を外れにくくすることができる。
As described above, the jaw portion 21 including the end portions 2a and 2b is formed in a convex curved shape on the outer side of the cover. For this reason, the end portions 2a and 2b expand to the outside of the cover, and the force for separating them is reduced. Therefore, it is possible to reduce the force for moving the male side engaging portion 3b in the direction of being pulled out of the groove 4 and the force for expanding the width of the groove 4. Thereby, engagement with the male side engaging part 3b (male side protrusion 6) and the female side engaging part 3a (female side protrusion 5) can be made hard to disengage.
（雌側突起５を溝４の内部に設けたことによる作用）
雌側係合部３ａにおける第１板状片３１と第２板状片３２との接続部分、すなわち溝４の底部４０、および底部４０に隣接する部位は、その弾性力により、第１板状片３１と第２板状片３２が雄側係合部３ｂを挟み込むための力を発生する。溝４の幅が広がる方向に第１板状片３１と第２板状片３２が離間しても、ばね鋏やトングの支点のように、底部４０、および底部４０に隣接する部位が弾性力を発生することで、第１板状片３１と第２板状片３２を元の位置に戻そうとする。第１板状片３１と第２板状片３２が（雌側突起５に係合する）雄側突起６を挟み込む力は、溝４の底部４０から上記雄側突起６までの距離L1が短いほど大きくなる。仮に、雌側突起５が、溝４の開口部４１に（例えば第２板状片３２の周方向先端部分を折り曲げることにより）設けられた場合には、溝４の底部４０から（雌側突起５に係合する）雄側突起６までの距離L1が長くなるおそれがある（図１２、図１３参照）。この場合、この雄側突起６が第１板状片３１と第２板状片３２とにより挟み込まれる力が弱くなる。これに対し、雌側突起５が、溝４を構成する板状片（第２板状片３２）の面内に設けられている。よって、上記距離L1が長くなるおそれを抑制できるため、この雄側突起６が第１板状片３１と第２板状片３２とにより挟み込まれる力を強くすることができる。よって、雄側係合部３ｂ（雄側突起６）と雌側係合部３ａ（雌側突起５）との係合が外れにくい。したがって、カバー１による保護機能（信頼性）を向上することができる。
(Operation by providing the female projection 5 inside the groove 4)
The connecting portion between the first plate-like piece 31 and the second plate-like piece 32 in the female-side engaging portion 3a, that is, the bottom 40 of the groove 4 and the portion adjacent to the bottom 40 are, due to their elastic force, the first plate-like The piece 31 and the second plate-like piece 32 generate a force for sandwiching the male engagement portion 3b. Even if the first plate-like piece 31 and the second plate-like piece 32 are separated in the direction in which the width of the groove 4 widens, the bottom portion 40 and the portion adjacent to the bottom portion 40 are elastic as in the spring rod and the fulcrum of the tongue. As a result, the first plate-like piece 31 and the second plate-like piece 32 are returned to their original positions. The force by which the first plate-like piece 31 and the second plate-like piece 32 sandwich the male-side projection 6 (engaging with the female-side projection 5) is short in the distance L1 from the bottom 40 of the groove 4 to the male-side projection 6. It gets bigger. If the female projection 5 is provided in the opening 41 of the groove 4 (for example, by bending the circumferential tip of the second plate-like piece 32), the female projection 5 is formed from the bottom 40 of the groove 4 (female projection). There is a possibility that the distance L1 to the male projection 6 (which engages with 5) becomes long (see FIGS. 12 and 13). In this case, the force with which the male projection 6 is sandwiched between the first plate-like piece 31 and the second plate-like piece 32 is weakened. On the other hand, the female-side protrusion 5 is provided in the plane of the plate-like piece (second plate-like piece 32) constituting the groove 4. Therefore, since the possibility that the distance L1 becomes long can be suppressed, the force with which the male projection 6 is sandwiched between the first plate-like piece 31 and the second plate-like piece 32 can be increased. Therefore, the engagement between the male side engaging portion 3b (male side protrusion 6) and the female side engaging portion 3a (female side protrusion 5) is difficult to be disengaged. Therefore, the protection function (reliability) by the cover 1 can be improved.
ここで、底部４０は閉じられている。すなわち、底部４０に穴等が設けられていない。よって、この底部４０が発生する挟み込み力の低下が抑制されるため、雄側係合部３ｂないし雄側突起６が第１板状片３１と第２板状片３２とにより挟み込まれる力が強くなる。よって、雄側係合部３ｂ（雄側突起６）と雌側係合部３ａ（雌側突起５）との係合が外れにくい。
Here, the bottom 40 is closed. That is, the bottom 40 is not provided with a hole or the like. Therefore, since the fall of the pinching force generated by the bottom portion 40 is suppressed, the force with which the male side engaging portion 3b or the male side protrusion 6 is pinched by the first plate-like piece 31 and the second plate-like piece 32 is strong. Become. Therefore, the engagement between the male side engaging portion 3b (male side protrusion 6) and the female side engaging portion 3a (female side protrusion 5) is difficult to be disengaged.
第２板状片３２における底部４０に隣接する部位にS字状の湾曲部320が設けられている。よって、湾曲部320がばねとして機能することで、上記弾性力をより効果的に発生することができる。また、溝４の幅が広がった状態に雌側係合部３ａが塑性変形することを抑制することができるため、雄側係合部３ｂ（雄側突起６）と雌側係合部３ａ（雌側突起５）との係合が外れにくい。第１板状片３１と第２板状片３２を折り返した状態で雌側端部２ａと第１板状片３１と第２板状片３２とが周方向で重なる部分にプレスによりアールを付ける工程において、底部４０に連続したS字状の湾曲部が自然にできる場合がある。これを上記湾曲部320として利用すれば、特別な工程が不要となる。なお、第１板状片３１における底部４０に隣接する部位に（も）、同様の湾曲部を設けることとしてもよい。
An S-shaped curved portion 320 is provided at a portion adjacent to the bottom portion 40 in the second plate-shaped piece 32. Accordingly, the elastic force can be generated more effectively by the bending portion 320 functioning as a spring. Moreover, since it can suppress that the female side engaging part 3a plastically deforms in the state where the width | variety of the groove | channel 4 was expanded, the male side engaging part 3b (male side protrusion 6) and the female side engaging part 3a ( It is difficult to disengage from the female projection 5). In a state where the first plate-like piece 31 and the second plate-like piece 32 are folded back, a portion where the female side end 2a, the first plate-like piece 31 and the second plate-like piece 32 overlap in the circumferential direction is rounded by pressing. In the process, an S-shaped curved portion continuous with the bottom 40 may be naturally formed. If this is used as the bending portion 320, a special process is not necessary. In addition, it is good also as providing the same curved part in the site | part adjacent to the bottom part 40 in the 1st plate-shaped piece 31 (also).
雄側係合部３ｂを雌側係合部３ａの溝４に挿入することを容易にするため、又は加工の都合上、溝４の内部の幅よりも開口部４１の幅のほうが大きくなる（溝４がＶ字状になる）ように元々設けられている場合がある。［特に、雌側突起５が、溝４を構成する第１板状片３１または第２板状片３２の面内から突出するのではなく、溝４の開口部４１に（例えば第２板状片３２の周方向先端部分を折り曲げることにより）設けられた場合には、溝４の開口部４１の幅は、雄側係合部３ｂが挿入される分に加え、雌側突起５の分だけ、余計に必要となる。よって、溝４の内部の幅よりも開口部４１の幅のほうが大きくなりやすい。］また、上記のように、溝４の幅を広げる力が作用することにより、両係合部３ａ，３ｂを係合させた後、溝４の内部の幅よりも開口部４１の幅のほうが大きくなるように雌側係合部３ａが変形する場合もある。これに対し、雌側突起５が、溝４を構成する板状片（第２板状片３２）の面内に設けられている。よって、上記のように溝４の内部の幅よりも開口部４１の幅のほうが大きい（溝４がＶ字状になる）場合でも、雄側突起６は、幅が大きい溝４の開口部４１ではなく、幅が小さい溝４の内部で、雌側突起５と係合する。したがって、雄側突起６は、雌側突起５との係合部位において、より確実に、第１板状片３１と第２板状片３２との間に挟まれるように保持されるため、雄側係合部３ｂ（雄側突起６）と雌側係合部３ａ（雌側突起５）との係合が外れにくい。
In order to facilitate the insertion of the male side engaging portion 3b into the groove 4 of the female side engaging portion 3a, or for convenience of processing, the width of the opening 41 is larger than the width inside the groove 4 ( The groove 4 may be originally provided so as to have a V shape. [In particular, the female projection 5 does not protrude from the surface of the first plate-like piece 31 or the second plate-like piece 32 constituting the groove 4 but is formed in the opening 41 of the groove 4 (for example, the second plate-like piece). In the case where it is provided (by bending the distal end portion in the circumferential direction of the piece 32), the width of the opening 41 of the groove 4 is equal to the female projection 5 in addition to the insertion of the male engagement portion 3b. It is necessary more. Therefore, the width of the opening 41 is likely to be larger than the width inside the groove 4. In addition, as described above, the force of expanding the width of the groove 4 acts, so that after engaging both the engaging portions 3a and 3b, the width of the opening 41 is larger than the width inside the groove 4. The female side engaging portion 3a may be deformed so as to increase. On the other hand, the female-side protrusion 5 is provided in the plane of the plate-like piece (second plate-like piece 32) constituting the groove 4. Therefore, even when the width of the opening 41 is larger than the width inside the groove 4 as described above (the groove 4 is V-shaped), the male projection 6 has the opening 41 of the groove 4 having a large width. Instead, it engages with the female projection 5 inside the groove 4 having a small width. Accordingly, the male projection 6 is held so as to be more reliably sandwiched between the first plate-like piece 31 and the second plate-like piece 32 at the engagement portion with the female-side projection 5. The engagement between the side engaging portion 3b (male side protrusion 6) and the female side engaging portion 3a (female side protrusion 5) is difficult to be disengaged.
（アール形状による作用）
雄側係合部３ｂ（雄側係合片３０）、雌側係合部３ａ（第１板状片３１、第２板状片３２）、および第１板状片３１に対向する（周方向で溝４と重なる）雌側端部２ａを、カバー外側に凸の曲面状とした（アールを付けた）。よって、カバー１において雄側係合部３ｂと雌側係合部３ａが係合する部位を配管等７の外周面に沿った曲面形状とすることができる。よって、カバー１の密着度をより高めることができる。具体的には、係合部３の近傍を含めたカバー１の開口部２２の形状を、カバー１が覆う対象物（配管等７）の外周形状に倣った円筒状にすることが容易となる。また、雌側係合部３ａを雌側端部２ａに沿った曲面形状とすることで、雄側係合部３ｂと係合する雌側係合部３ａがカバー内側に突出する（膨らむ）ことを抑制することができる。
(Effects by R shape)
Opposing the male engagement portion 3b (male engagement piece 30), the female engagement portion 3a (first plate-like piece 31, second plate-like piece 32), and the first plate-like piece 31 (circumferential direction) The female side end 2a (which overlaps with the groove 4) is formed in a convex curved shape on the outer side of the cover (with a rounded shape). Therefore, a portion of the cover 1 where the male side engaging portion 3b and the female side engaging portion 3a are engaged can be formed into a curved shape along the outer peripheral surface of the pipe 7 or the like. Therefore, the adhesion degree of the cover 1 can be further increased. Specifically, it becomes easy to make the shape of the opening 22 of the cover 1 including the vicinity of the engaging portion 3 into a cylindrical shape following the outer peripheral shape of the object (pipe 7 or the like) covered by the cover 1. . Further, by forming the female side engaging portion 3a into a curved shape along the female side end portion 2a, the female side engaging portion 3a that engages with the male side engaging portion 3b protrudes (inflates) inside the cover. Can be suppressed.
また、雄側係合部３ｂ（雄側係合片３０）と雌側係合部３ａ（第１板状片３１、第２板状片３２）にアールを付けた。よって、例えば雌側係合部３ａ（第１板状片３１または第２板状片３２）にアールが付けられていない場合に比べ、雄側係合部３ｂの溝４内での移動がスムースになる。このように溝４内での雄側係合部３ｂの移動を案内することにより、カバー１の装着作業を容易化することができる。また、溝４を構成する第１板状片３１及び第２板状片３２と、溝４に挿入される雄側係合部３ｂとの密着度が向上する。このため、雄側突起６は、雌側突起５との係合部位において、より確実に、第１板状片３１と第２板状片３２との間に挟まれる。よって、雄側係合部３ｂ（雄側突起６）と雌側係合部３ａ（雌側突起５）との係合が外れにくい。また、雄側係合片３０と第１，第２板状片３２との密着度を高めることで、これらの間の隙間内に外部から水が浸入したり溜まったりすることを抑制できる。また、雄側係合片３０と雌側係合部３ａ（第１板状片３１、第２板状片３２）を同じ方向（カバー外側）に凸の曲面状としたことで、雄側係合片３０から雌側係合部３ａ（第１板状片３１、第２板状片３２）に入力される力の作用点が分散され、力が逃げやすい。よって、溝４の開口部４１が広がりにくくなるため、雌側係合部３ａと雄側係合部３ｂの係合が外れにくくなる。
Further, the male side engaging portion 3b (male side engaging piece 30) and the female side engaging portion 3a (first plate-like piece 31, second plate-like piece 32) are rounded. Therefore, for example, the movement of the male side engaging portion 3b in the groove 4 is smoother than when the female side engaging portion 3a (the first plate-like piece 31 or the second plate-like piece 32) is not rounded. become. Thus, by guiding the movement of the male side engaging portion 3 b in the groove 4, the mounting work of the cover 1 can be facilitated. Further, the degree of adhesion between the first plate-like piece 31 and the second plate-like piece 32 constituting the groove 4 and the male side engaging portion 3b inserted into the groove 4 is improved. For this reason, the male side protrusion 6 is more reliably sandwiched between the first plate-like piece 31 and the second plate-like piece 32 at the engagement portion with the female-side protrusion 5. Therefore, the engagement between the male side engaging portion 3b (male side protrusion 6) and the female side engaging portion 3a (female side protrusion 5) is difficult to be disengaged. Further, by increasing the degree of adhesion between the male engagement piece 30 and the first and second plate-like pieces 32, it is possible to prevent water from entering or accumulating from the outside into the gap between them. In addition, the male side engaging piece 30 and the female side engaging portion 3a (the first plate-like piece 31 and the second plate-like piece 32) are curved in the same direction (cover outer side), so that the male side The point of application of the force input from the combined piece 30 to the female side engaging portion 3a (the first plate-like piece 31 and the second plate-like piece 32) is dispersed, and the force is likely to escape. Therefore, since the opening 41 of the groove 4 is difficult to expand, the engagement of the female side engaging portion 3a and the male side engaging portion 3b is difficult to disengage.
（雌側突起５を複数設けたことによる作用）
カバー１は板金を加工することで形成されているため、高精度に作製することが困難である。よって、配管等７とカバー１との間の隙間が生じやすい。隙間が大きくなると、断熱材による保温の効果を低下させてしまう。これに対し、係合用の突起を周方向（雄側係合部３ｂが溝４へ挿入され又は抜き取られる方向）に複数設けて多段化した。具体的には、周方向に複数並ぶ雌側突起５のいずれに雄側突起６が係合するかに応じて、雌側係合部３ａに対する雄側係合部３ｂの係合位置（雌側端部２ａに対する雄側端部２ｂの周方向位置）を任意に調節することができる。よって、事後的に（カバー１の作製後、装着時に）、カバー１が覆う対象（配管等７）の寸法に合わせてカバー本体２の寸法を適宜調整することが可能となる。これにより、寸法精度に余裕を持たせてカバー１を安価に作製できると共に、カバー本体２を配管等７の外周面に接近させて密着度を高め、配管等７をより高品質に覆って、カバー１による保護機能を向上することができる。
(Operation by providing a plurality of female projections 5)
Since the cover 1 is formed by processing a sheet metal, it is difficult to manufacture the cover 1 with high accuracy. Therefore, a gap between the piping 7 and the cover 1 is likely to occur. When the gap becomes large, the effect of heat insulation by the heat insulating material is reduced. On the other hand, a plurality of engaging projections are provided in the circumferential direction (in the direction in which the male side engaging portion 3b is inserted into or removed from the groove 4) to be multistage. Specifically, the engagement position (female side) of the male side engagement portion 3b with respect to the female side engagement portion 3a depends on which of the plurality of female side projections 5 arranged in the circumferential direction is engaged with the male side projection 6. The circumferential position of the male side end 2b with respect to the end 2a can be adjusted arbitrarily. Therefore, the dimensions of the cover main body 2 can be appropriately adjusted according to the dimensions of the target (pipe 7 or the like) covered by the cover 1 afterwards (after the cover 1 is manufactured and attached). As a result, the cover 1 can be produced at a low cost with a margin of dimensional accuracy, and the cover body 2 is brought close to the outer peripheral surface of the pipes 7 to increase the degree of adhesion, thereby covering the pipes 7 with higher quality, The protection function by the cover 1 can be improved.
なお、カバー１は、配管等７の直線部（直管部分）を覆うための直管用カバー（周方向の一部が切れて拡開可能な円筒形状のラッキングカバー）であってもよい。本実施例のカバー１は、配管等７の屈曲部を覆うためのエルボ用カバーである。配管等７の直線部のカバーよりも屈曲部のカバー１のほうが、高精度に作製することが困難である。また、配管に巻き付けられた状態の断熱材の径が予め設定されたサイズからズレる可能性は、屈曲部のほうが高い。よって、屈曲部用のカバー１の寸法を、対応する屈曲部の寸法に合わせて予め設定しても、実際にカバー１を配管等７に装着したときに、配管等７とカバー１との間の隙間が大きくなるおそれが高い。［なお、直線部用のカバーによって覆われた配管等７の直線部（直管部分）の端部が屈曲部用のカバー１の開口部２２に嵌合する場合には、この開口部２２を構成する屈曲部用のカバー本体２と、直線部用のカバーとの間の隙間が問題となる。よって、本実施例で「配管等７とカバー１との間」という場合の「配管等７」には、上記直線部用のカバーを含めるものとする。］
The cover 1 may be a straight pipe cover (cylindrical racking cover that can be expanded by cutting off a part in the circumferential direction) for covering a straight portion (straight pipe portion) of the pipe 7 or the like. The cover 1 of the present embodiment is an elbow cover for covering the bent portion of the pipe 7 or the like. It is more difficult to produce the bent cover 1 with higher accuracy than the straight cover of the pipe 7 or the like. In addition, the possibility that the diameter of the heat insulating material wound around the pipe deviates from a preset size is higher in the bent portion. Therefore, even if the dimensions of the cover 1 for the bent portion are set in advance in accordance with the dimensions of the corresponding bent portion, when the cover 1 is actually attached to the pipe 7 or the like, There is a high possibility that the gaps of [If the end of the straight part (straight pipe part) of the pipe 7 or the like covered by the cover for the straight part fits into the opening 22 of the cover 1 for the bent part, the opening 22 is The gap between the cover body 2 for the bent portion and the cover for the straight portion is a problem. Therefore, in the present embodiment, “pipe etc. 7” in the case of “between the pipe etc. 7 and the cover 1” includes the cover for the straight portion. ]
これに対し、屈曲部用のカバー１に上記位置調整機能を設けることで、カバー１が覆う実際の配管等７の径に合わせてカバー本体２の開口部２２の径を適宜調整することが可能となる。これにより、開口部２２その他の部位におけるカバー１と配管等７との間の隙間を小さくして、カバー１の密着度を高めることができる。よって、断熱材による保温の効果を向上できると共に、開口部２２におけるカバー１の配管等７に対する密着度を高めることで、開口部２２における隙間を介してカバー１の内側へ水が浸入すること等を抑制できる。したがって、より効果的に、カバー１による保護機能を向上することができる。
On the other hand, by providing the position adjustment function in the cover 1 for the bent portion, it is possible to appropriately adjust the diameter of the opening 22 of the cover main body 2 according to the diameter of the actual piping 7 or the like that the cover 1 covers. It becomes. Thereby, the clearance gap between the cover 1 and piping 7 etc. in the opening part 22 other site | part can be made small, and the adhesion degree of the cover 1 can be raised. Therefore, while being able to improve the effect of heat insulation by the heat insulating material, increasing the degree of adhesion of the cover 1 to the piping 7 or the like 7 in the opening 22 allows water to enter the inside of the cover 1 through the gap in the opening 22. Can be suppressed. Therefore, the protection function by the cover 1 can be improved more effectively.
仮に、雌側係合部３ａではなく雄側係合部３ｂに複数の突起を周方向に並んで設けた場合、これらの雄側突起６の少なくとも一部が溝４内に収容されず（雌側端部２ａまたは第２板状片３２によって覆われず）カバー１の外周面（カバー外側）や内周面（カバー内側）に露出する可能性が高まる（図１２、図１３参照）。特に、雄側突起６を雌側係合部３ａの浅い位置（溝４の開口側）で係合させたときや、雄側突起６の周方向に並ぶ数（実現可能な係合の段数）を増やしたときには、上記可能性がより高くなる。また、係合用の突起（またはこれを形成するための切れ目）がカバー１の外周面に露出した状態であると、美観が悪化するおそれがある。また、突起がカバー１の外周面に突出した状態であると、カバー１の販売や梱包や取付けなどの取扱い時に、突起が人の手等の身体に触れてこれを傷付ける（怪我をする）おそれがある。さらに、突起がカバー１の内周面に突出した状態であると、突起がカバー１の内部の断熱材等に干渉する（引っ掛って邪魔になったり傷つけたりする）おそれがある。
If a plurality of projections are provided in the circumferential direction in the male engagement portion 3b instead of the female engagement portion 3a, at least a part of these male projections 6 is not accommodated in the groove 4 (female The possibility of exposure to the outer peripheral surface (cover outer side) or inner peripheral surface (cover inner side) of the cover 1 is increased (not covered by the side end 2a or the second plate-like piece 32) (see FIGS. 12 and 13). In particular, when the male projection 6 is engaged at a shallow position (opening side of the groove 4) of the female engagement portion 3a, or when the male projection 6 is arranged in the circumferential direction (number of possible engagement steps). When the number is increased, the above possibility becomes higher. Further, when the engaging protrusion (or the cut line for forming the engaging protrusion) is exposed on the outer peripheral surface of the cover 1, the appearance may be deteriorated. Further, if the protrusion protrudes from the outer peripheral surface of the cover 1, the protrusion may touch the body of a human hand or the like when the cover 1 is sold, packaged or mounted, or may be injured (injured). There is. Furthermore, when the protrusion is in a state of protruding from the inner peripheral surface of the cover 1, the protrusion may interfere with a heat insulating material or the like inside the cover 1 (being caught and obstructed or damaged).
これに対し、雌側係合部３ａ（溝４を構成する第２板状片３２）に複数の雌側突起５を周方向に並んで設けた。よって、実現可能な係合の段数を増やしても、雄側係合部３ｂと雌側係合部３ａのいずれについても、その突起がカバー１の外周面や内周面に露出したり突出したりすることを抑制することができる。すなわち、複数の雌側突起５により複数の段数を実現できるため、雄側突起６を複数設けることは不要となる。これにより、係合させる位置（実現される係合の段数）に関わらず、雄側突起６を雌側係合部３ａによって容易に覆い隠すことができる。本実施例のように雌側係合部３ａをカバー１の内側に配置した（第１板状片３１を雌側端部２ａの内側に折り返した）場合には、複数の雌側突起５を溝４内に設けることで、これらをカバー１の外周面（周方向で溝４と重なる雌側端部２ａ）により覆い隠すことが可能である。よって、美観が悪化するおそれを抑制することができる。また、複数の雌側突起５は溝４内に突出するように設けられているため、雌側突起５が人の手等に触れて傷付けたりカバー１の内部の断熱材等に干渉したりするおそれはない。
On the other hand, a plurality of female projections 5 are provided side by side in the circumferential direction on the female engagement portion 3a (second plate-like piece 32 constituting the groove 4). Therefore, even if the number of steps of engagement that can be realized is increased, the protrusions of the male side engaging part 3b and the female side engaging part 3a are exposed or protruded on the outer peripheral surface or inner peripheral surface of the cover 1. Can be suppressed. That is, since a plurality of stages can be realized by the plurality of female projections 5, it is not necessary to provide a plurality of male projections 6. Thereby, the male projection 6 can be easily covered with the female engagement portion 3a regardless of the position to be engaged (the number of engagement stages realized). When the female side engaging portion 3a is disposed inside the cover 1 as in the present embodiment (the first plate-like piece 31 is folded back inside the female side end portion 2a), the plurality of female side protrusions 5 are provided. By providing in the groove | channel 4, it is possible to cover these by the outer peripheral surface of the cover 1 (female side edge part 2a which overlaps with the groove | channel 4 in the circumferential direction). Therefore, the possibility that the aesthetics deteriorate can be suppressed. Further, since the plurality of female side protrusions 5 are provided so as to protrude into the groove 4, the female side protrusions 5 may be damaged by touching a human hand or the like or may interfere with a heat insulating material or the like inside the cover 1. There is no fear.
ここで、仮に、雄側係合部３ｂに複数の突起（雄側突起６）を周方向に並んで設けた場合、これら雄側突起６の上記露出を回避するために、雄側係合部３ｂを収容する雌側係合部３ａの溝４を深く設定する（溝４を構成する第１板状片３１や第２板状片３２の長さを長くする）ことも考えられる。しかし、この場合、材料が余分に必要となって無駄が発生したりコスト高となったりする。また、雌側係合部３ａが大型化することで、美観が悪化したり、雌側係合部３ａが人の手等に触れて傷付けたりカバー１の内部の断熱材等に干渉したりするおそれが高くなる。これに対し、本実施例では、雌側係合部３ａの溝４を構成する第１板状片３１や第２板状片３２の長さは、少なくとも複数の雌側突起５を周方向に並んで設けるための長さがあれば足りる。すなわち、上記場合のような、溝４を深くして突起の露出を回避するための分が不要である。よって、材料を余分に必要とせずに無駄を削減してコストを抑制できる。また、雌側係合部３ａを小型化することで、これが人の手等に触れて傷付けたりカバー１の内部の断熱材等に干渉したりすることを抑制できる。
Here, if a plurality of protrusions (male-side protrusions 6) are provided in the circumferential direction on the male-side engagement part 3b, the male-side engagement part is used in order to avoid the exposure of the male-side protrusions 6. It is also conceivable that the groove 4 of the female side engaging portion 3a that accommodates 3b is set deep (the length of the first plate-like piece 31 and the second plate-like piece 32 constituting the groove 4 is increased). In this case, however, extra material is required, resulting in waste and high costs. In addition, the female-side engaging portion 3a is enlarged, so that the beauty is deteriorated, the female-side engaging portion 3a is touched and damaged by a human hand or the like, and interferes with the heat insulating material inside the cover 1 or the like. The fear increases. On the other hand, in the present embodiment, the length of the first plate-like piece 31 and the second plate-like piece 32 constituting the groove 4 of the female-side engaging portion 3a is such that at least the plurality of female-side protrusions 5 are arranged in the circumferential direction. It is enough if there is a length to provide it side by side. That is, there is no need to make the groove 4 deeper to avoid exposure of the protrusion as in the above case. Therefore, waste can be reduced and costs can be suppressed without requiring extra material. Further, by reducing the size of the female side engaging portion 3a, it is possible to prevent the female side engaging portion 3a from being damaged by touching a human hand or the like or from interfering with the heat insulating material inside the cover 1 or the like.
言換えると、仮に、雄側係合部３ｂに複数の突起（雄側突起６）を周方向に並んで設けた場合、雌側係合部３ａの大型化を抑制しつつ、雄側突起６を雌側係合部３ａの浅い位置（溝４の開口側）で係合させても雄側突起６がカバー１の外周面や内周面へ露出しないようにしようとすると、雄側突起６の数（実現可能な係合の段数）を減らす必要がある。しかし、実現可能な係合の段数を減らすと、カバー１の寸法の調整代が限定されるだけでなく、雌側係合部３ａの溝４に挿入される雄側係合部３ｂの長さが短くなりやすい。よって、雄側係合部３ｂが雌側係合部３ａの溝４内に十分に支持されにくくなるため、係合が外れやすい。また、顎部２１の弾性力等によりカバー外側へ広がろうとする雌側端部２ａおよび雄側端部２ｂに起因して、雌側係合部３ａには、これに係合する雄側係合部３ｂから力が作用する。本実施例のように雌側係合部３ａをカバー１の内側に設けた場合、図８に示すように、溝４内における雄側係合部３ｂの先端と第１板状片３１との接触部位Pを支点とし、溝４の開口部４１における第２板状片３２の先端近傍と雄側係合片３０との接触部位Qを作用点として、第２板状片３２を第１板状片３１から引き離して溝４の幅を広げる方向に、第２板状片３２に力が作用する場合がある。上記のように雌側係合部３ａの溝４に挿入される雄側係合部３ｂの長さが短くなると、支点Pから作用点Qまでの距離L3が短くなり、溝４が広がり（開き）やすくなる。よって、係合が外れやすい。
In other words, if a plurality of protrusions (male protrusions 6) are provided in the circumferential direction on the male engagement portion 3b, the male protrusion 6 is suppressed while suppressing an increase in size of the female engagement portion 3a. If the male side projection 6 is not exposed to the outer peripheral surface or inner peripheral surface of the cover 1 even when the female side engagement portion 3a is engaged at a shallow position (opening side of the groove 4), the male side projection 6 (The number of possible engagement stages) must be reduced. However, if the number of steps of engagement that can be realized is reduced, not only the adjustment margin of the dimension of the cover 1 is limited, but also the length of the male side engaging portion 3b inserted into the groove 4 of the female side engaging portion 3a. Tends to be shorter. Therefore, the male side engaging portion 3b is not sufficiently supported in the groove 4 of the female side engaging portion 3a, so that the engagement is easily released. Further, due to the female side end 2a and the male side end 2b that are about to spread outward due to the elastic force of the jaw portion 21, the female side engaging portion 3a has a male side engaging portion engaged therewith. A force acts from the joint part 3b. When the female side engaging portion 3a is provided inside the cover 1 as in the present embodiment, as shown in FIG. 8, the tip of the male side engaging portion 3b in the groove 4 and the first plate-like piece 31 Using the contact site P as a fulcrum and the contact site Q between the vicinity of the tip of the second plate-like piece 32 and the male engagement piece 30 in the opening 41 of the groove 4 as the action point, the second plate-like piece 32 is used as the first plate. A force may act on the second plate-like piece 32 in a direction in which the width of the groove 4 is widened away from the shaped piece 31. When the length of the male side engaging portion 3b inserted into the groove 4 of the female side engaging portion 3a is shortened as described above, the distance L3 from the fulcrum P to the action point Q is shortened, and the groove 4 is expanded (opened). ) It becomes easy. Therefore, the engagement is easily released.
これに対し、本実施例では、雌側係合部３ａの大型化を抑制しつつ、雄側突起６を雌側係合部３ａの浅い位置（溝４の開口側）で係合させても突起５がカバー１の外周面や内周面へ露出しないようにすることができるため、実現可能な係合の段数を増やすことができる。これにより、カバー１の寸法の調整代を増大することができる。また、段数を増やす分だけ、雌側係合部３ａの溝４に挿入される雄側係合部３ｂの長さを長くすることが可能である。よって、雄側係合部３ｂが雌側係合部３ａの溝４内に十分に支持されやすくなる。また、上記距離L3が長くなり、溝４が広がりにくくなる。よって、係合が外れにくい。
On the other hand, in this embodiment, even if the male-side protrusion 6 is engaged at a shallow position (opening side of the groove 4) of the female-side engaging portion 3a while suppressing an increase in size of the female-side engaging portion 3a. Since the protrusion 5 can be prevented from being exposed to the outer peripheral surface or inner peripheral surface of the cover 1, the number of engagement stages that can be realized can be increased. Thereby, the adjustment margin of the dimension of the cover 1 can be increased. Moreover, the length of the male side engaging part 3b inserted in the groove | channel 4 of the female side engaging part 3a can be lengthened by the part which increases the number of steps. Therefore, it becomes easy to fully support the male side engaging part 3b in the groove | channel 4 of the female side engaging part 3a. Further, the distance L3 becomes longer, and the groove 4 becomes difficult to expand. Therefore, it is difficult to disengage.
（雌側突起５等の形状や配置による作用）
なお、第２板状片３２に切れ目500を伴うことなく雌側突起５を付加してもよい。本実施例では、雌側突起５は、第２板状片３２がその面内で局所的に切れ目500を付けられ、この切れ目500に隣接する部分が溝４内に持ち上げられるように塑性変形することで、形成されている。具体的には、板材21a（第２板状片３２に相当する部位）にパンチやプレス加工を施すことにより、雌側突起５を切り起こし（抜き起こし）形成することができる。よって、雌側突起５の形成が容易であり、また追加的な材料や部品が不要であるため、製造コストを低減できる。また、１つの型を用いて複数の突起５を形成する場合には、これらの突起５を一度に形成できるため、製造コストをより低減できる。
(Operation by the shape and arrangement of the female projection 5 etc.)
The female projection 5 may be added to the second plate-like piece 32 without the cut 500. In the present embodiment, the female projection 5 is plastically deformed so that the second plate-like piece 32 is locally provided with a cut 500 in the plane, and a portion adjacent to the cut 500 is lifted into the groove 4. By that, it is formed. Specifically, the female projection 5 can be cut and raised (pulled up) by punching or pressing the plate material 21a (the portion corresponding to the second plate-like piece 32). Therefore, the formation of the female projection 5 is easy, and additional materials and parts are unnecessary, so that the manufacturing cost can be reduced. Moreover, when forming the some protrusion 5 using one type | mold, since these protrusion 5 can be formed at once, manufacturing cost can be reduced more.
雌側突起５は、溝４の底部４０に向って開口するポケット状（ドーム状）に形成されている。雌側突起５の上記開口部を囲む端面である当接面502に雄側突起６が当接することにより、雄側係合部３ｂの溝４内からの抜き取られる方向での変位が規制され、係合が実現する。仮に、雌側係合部３ａではなく雄側係合部３ｂに複数の突起を周方向に並んで設けた場合、これらの雄側突起６の形状をポケット状に形成したときは、雄側係合片３０の曲げ方向の剛性が高くなる（図１２、図１３参照）。よって、雄側係合部３ｂを雌側係合部３ａの溝４に挿入する際、溝４が広がりやすくなる。又は、両者３ａ，３ｂが係合した状態で、溝４の幅を広げる方向に作用する上記力が大きくなり、溝４が広がりやすくなる。また、複数の雄側突起６の形状をポケット状に形成したときは、雄側係合部３ｂ（雄側係合片３０）にアールを付けることが難しくなる。これに対し、本実施例では、複数の突起５を雌側係合部３ａに設けたことで、雄側係合部３ｂに複数の突起を設けることが不要となるため、雄側係合片３０の曲げ方向の剛性が高くなることが抑制される。よって、溝４が広がりにくくなる。また、雄側係合部３ｂ（雄側係合片３０）にアールを付けることが容易となる。
The female projection 5 is formed in a pocket shape (dome shape) that opens toward the bottom 40 of the groove 4. When the male projection 6 comes into contact with the contact surface 502 which is the end surface surrounding the opening of the female projection 5, the displacement in the direction in which the male engagement portion 3b is extracted from the groove 4 is restricted, Engagement is achieved. If a plurality of protrusions are provided in the circumferential direction in the male side engaging part 3b instead of the female side engaging part 3a, when the male side protrusions 6 are formed in a pocket shape, The bending direction of the joint piece 30 is increased in rigidity (see FIGS. 12 and 13). Therefore, when inserting the male side engaging part 3b in the groove | channel 4 of the female side engaging part 3a, the groove | channel 4 becomes easy to spread. Or in the state which both 3a and 3b engaged, the said force which acts on the direction which expands the width | variety of the groove | channel 4 becomes large, and the groove | channel 4 becomes easy to spread. Moreover, when the shape of the plurality of male side protrusions 6 is formed in a pocket shape, it is difficult to put a round on the male side engaging portion 3b (male side engaging piece 30). On the other hand, in the present embodiment, since the plurality of protrusions 5 are provided on the female side engaging portion 3a, it is not necessary to provide a plurality of protrusions on the male side engaging portion 3b. It is suppressed that the rigidity of 30 bending directions becomes high. Therefore, the groove 4 is difficult to expand. Moreover, it becomes easy to give a round to the male side engaging part 3b (male side engaging piece 30).
切れ目500を付けるとその部分の剛性が低下するおそれがある。仮に、第２板状片３２の面内において幅方向に延びる単一の切れ目500を付けることで雌側突起５を１つだけ形成した場合、第２板状片３２の剛性を確保しつつ幅方向で雌側突起５が占める範囲を広げることが困難である。これに対し、第２板状片３２の面内において雌側突起５を複数、幅方向に並んで設けたため、切れ目500を付けることで雌側突起５を形成しても、雌側係合部３ａの剛性を確保しつつ、幅方向で（複数の）雌側突起５が全体として占める範囲を広げることができる。雌側突起５が幅方向で占める範囲を広げることで、雌側突起５と雄側突起６との係合を外れにくくすることができる。また、個々の雌側突起５の切れ目500の開口面積を小さくすることができる。このように開口面積を小さくすることで、水の表面張力と相俟って、水が切れ目500を通ってカバー１の内側へ浸入することを抑制することができる。
If the cut 500 is made, the rigidity of the portion may be lowered. If only one female-side protrusion 5 is formed by attaching a single cut 500 extending in the width direction in the plane of the second plate-like piece 32, the width of the second plate-like piece 32 is secured while ensuring the rigidity. It is difficult to widen the range occupied by the female projection 5 in the direction. On the other hand, since a plurality of female projections 5 are provided in the width direction in the plane of the second plate-like piece 32, the female engagement portion can be formed even if the female projection 5 is formed by providing a cut 500. While securing the rigidity of 3a, the range occupied by the female projections 5 as a whole in the width direction can be expanded. Enlarging the range occupied by the female projection 5 in the width direction makes it difficult to disengage the female projection 5 from the male projection 6. Moreover, the opening area of the cut 500 of each female projection 5 can be reduced. By reducing the opening area in this manner, it is possible to prevent water from entering the inside of the cover 1 through the break 500 in combination with the surface tension of water.
複数の雌側突起５は、幅方向で一直線上に並ぶのではなく幅方向で蛇行し、斜めに互い違いに入り交じるように配置されている。よって、雌側係合部３ａ（複数の雌側突起５）に対して雄側係合部３ｂ（雄側突起６）が若干斜めの状態であっても、すなわち同じ周方向位置で幅方向に並ぶ複数の雌側突起５に対して、（幅方向に延びる）雄側突起６が若干の角度をもって配置されていても、雄側突起６が、複数の異なる周方向位置の雌側突起５に跨って係合することが可能となる。よって、溝４に雄側係合部３ｂを挿入して係合する作業を容易化できる。また、一旦実現された係合を外れにくくすることができる。また、第２板状片３２に切れ目500を付けることで雌側突起５を形成した場合でも、この雌側突起５を斜めに互い違いに複数設けることで、第２板状片３２の剛性を確保しつつ、第２板状片３２の面内における雌側突起５の（周方向および幅方向での）密度を高めることができる。よって、剛性を確保しつつ雌側突起５の数を周方向で増やすことが容易となる。言換えると、第２板状片３２の周方向寸法の増大を抑制して雌側係合部３ａの小型化を図りつつ、実現可能な係合の段数を増やすことができる。また、周方向で隣接する雌側突起５間の距離を縮めることで、雌側係合部３ａに対する雄側係合部３ｂの係合位置（周方向位置）をより細かく調節することができる。したがって、カバー１の密着度を高め、カバー１による保護機能を向上することができる。
The plurality of female-side protrusions 5 are arranged so as to meander in the width direction instead of being aligned in a straight line in the width direction, and to enter each other in an oblique manner. Therefore, even if the male engagement portion 3b (male protrusion 6) is slightly inclined with respect to the female engagement portion 3a (the plurality of female protrusions 5), that is, in the width direction at the same circumferential position. Even if the male projections 6 (extending in the width direction) are arranged at a slight angle with respect to the plurality of female projections 5 arranged side by side, the male projections 6 are formed on the female projections 5 at different circumferential positions. It is possible to engage across the two. Therefore, the operation | work which inserts and engages the male side engaging part 3b in the groove | channel 4 can be facilitated. Further, it is possible to make it difficult to disengage the engagement once realized. Further, even when the female projection 5 is formed by making a cut 500 in the second plate-like piece 32, the plurality of female-side projections 5 are provided obliquely and alternately to ensure the rigidity of the second plate-like piece 32. However, the density (in the circumferential direction and the width direction) of the female projection 5 in the plane of the second plate-like piece 32 can be increased. Therefore, it is easy to increase the number of female projections 5 in the circumferential direction while ensuring rigidity. In other words, it is possible to increase the number of engagement stages that can be achieved while suppressing the increase in the circumferential dimension of the second plate-like piece 32 and reducing the size of the female engagement portion 3a. Moreover, the engagement position (circumferential position) of the male side engaging part 3b with respect to the female side engaging part 3a can be adjusted more finely by shortening the distance between the female side protrusions 5 adjacent in the circumferential direction. Therefore, the adhesion degree of the cover 1 can be increased, and the protection function by the cover 1 can be improved.
第２板状片３２の先端部分が第２板状片３２の本体に対向するように折り返され、第３板状片３３を構成している。よって、第２板状片３２の周方向先端側の強度を向上できる。また、第２板状片３２の周方向先端側が丸みを帯びることとなる。このため、第２板状片３２の周方向先端側が人の手等を傷つけたり、カバー１の内部の断熱材等に干渉したりするおそれを低減できる。また、雌側係合部３ａの溝４内への雄側係合部３ｂの挿入を容易にし、カバー１の取付け作業性を向上することができる。第３板状片３３は、第２板状片３２を挟んで、第１板状片３１とは反対側に折り返されている。よって、溝４の開口部４１の幅が、雄側係合部３ｂが挿入される分に加え、第３板状片３３が折り返された分だけ余計に必要となることを回避し、これにより溝４の幅をより小さく設定することが可能である。
The tip end portion of the second plate-like piece 32 is folded back so as to face the main body of the second plate-like piece 32, thereby constituting a third plate-like piece 33. Therefore, the strength on the distal end side in the circumferential direction of the second plate-like piece 32 can be improved. Moreover, the circumferential direction front end side of the 2nd plate-shaped piece 32 will be rounded. For this reason, the possibility that the distal end side in the circumferential direction of the second plate-like piece 32 may injure human hands or the like or interfere with the heat insulating material or the like inside the cover 1 can be reduced. Moreover, the male side engaging part 3b can be easily inserted into the groove 4 of the female side engaging part 3a, and the mounting workability of the cover 1 can be improved. The third plate-like piece 33 is folded back on the opposite side to the first plate-like piece 31 with the second plate-like piece 32 interposed therebetween. Therefore, the width of the opening 41 of the groove 4 avoids the need for an extra portion corresponding to the amount of the third plate-shaped piece 33 being folded in addition to the amount of insertion of the male side engaging portion 3b. The width of the groove 4 can be set smaller.
（雌側係合部３ａをカバー内側に配置したことによる作用）
雌側係合部３ａをカバー１の内側に配置した。よって、両係合部３ａ，３ｂを係合させた状態でも、雌側係合部３ａがカバー１の外側に露出しない。これにより、装着後の仕上がり体裁を良くし、美観を向上することができる。また、雌側係合部３ａの角部がカバー１の外側に露出しないため、カバー１の取扱い時に上記角部が人の手等に触れてこれを傷付けるおそれがない。また、雌側係合部３ａ（第１板状片３１）と雌側端部２ａとの間の隙間がカバー１の外側に開口しないため、この隙間に水が溜まって錆びが発生し、美観が損なわれるといったおそれもない。
(Operation by arranging the female side engaging portion 3a inside the cover)
The female side engaging portion 3 a is disposed inside the cover 1. Therefore, even when both engaging portions 3 a and 3 b are engaged, the female side engaging portion 3 a is not exposed to the outside of the cover 1. Thereby, the finishing appearance after mounting | wearing can be improved and aesthetics can be improved. Moreover, since the corner | angular part of the female side engaging part 3a is not exposed to the outer side of the cover 1, there is no possibility that the said corner | angular part touches a human hand etc. at the time of handling of the cover 1, and this is damaged. In addition, since the gap between the female side engaging portion 3a (first plate-like piece 31) and the female side end portion 2a does not open to the outside of the cover 1, water accumulates in the gap and rust is generated, and the aesthetic appearance is increased. There is no risk of damage.
雌側係合部３ａをカバー１の内側に配置した場合、外力やカバー１自身の弾性力等により雄側係合部３ｂを介して雌側係合部３ａに作用する力は、雌側係合部３ａの溝４内（第１板状片３１の中間側の部位P）を支点として第２板状片３２の先端（溝４の開口部４１）側の部位Qを作用点としがちとなる。この場合、溝４の幅を広げようとする力の作用部位が第２板状片３２の先端（溝４の開口部４１）側の部位Qとなるため、第１板状片３１と第２板状片３２との接続部分Oから力の作用部位Qまでの距離L2が長くなる。よって、溝４の幅が広がりやすくなり、係合が外れやすくなるという課題が発生しやすい。したがって、「雌側突起５を溝４の内部に設けること等により溝４が広がりにくくなり係合が外れにくくなる」という上記作用効果を、雌側係合部３ａをカバー１の外側に配置した場合よりも、効果的に得ることができる。
When the female side engaging portion 3a is arranged inside the cover 1, the force acting on the female side engaging portion 3a via the male side engaging portion 3b due to an external force or the elastic force of the cover 1 itself is It tends to be a site Q on the tip (opening 41 of the groove 4) side of the second plate-like piece 32 with the inside of the groove 4 of the joint portion 3a (a portion P on the intermediate side of the first plate-like piece 31) as a fulcrum. Become. In this case, since the part where the force to increase the width of the groove 4 is the part Q on the tip (opening 41 of the groove 4) side of the second plate-like piece 32, the first plate-like piece 31 and the second plate The distance L2 from the connection portion O to the plate-like piece 32 to the force application site Q becomes longer. Therefore, the width | variety of the groove | channel 4 becomes easy to expand and it is easy to generate | occur | produce the subject that an engagement becomes easy to remove | release. Therefore, the female side engaging portion 3a is arranged outside the cover 1 with the above-mentioned effect of “the female side protrusion 5 is provided inside the groove 4 so that the groove 4 is difficult to expand and the engagement is difficult to disengage”. It can be obtained more effectively than the case.
また、雌側係合部３ａをカバー１の内側に配置した場合、溝４が広がると、第２板状片３２のカバー内側への突出量が増えるため、雌側係合部３ａ（第２板状片３２）とカバー内側の断熱材等との干渉が起きやすい。これに対し、上記のように溝４の幅を広がりにくくすることにより、上記干渉を抑制することができる。
Further, when the female side engaging portion 3a is arranged inside the cover 1, when the groove 4 is widened, the amount of protrusion of the second plate-like piece 32 to the inside of the cover increases, so that the female side engaging portion 3a (second Interference between the plate-like piece 32) and the heat insulating material inside the cover tends to occur. On the other hand, the interference can be suppressed by making the width of the groove 4 difficult to expand as described above.
本実施例のカバー１は配管等７の屈曲部用である。両係合部３ａ，３ｂは配管等７の屈曲部の内径側に配置される。この屈曲部の内径側において、カバー本体２の開口部２２は、雄側端部２ｂ（雄側係合片３０）の幅方向両端および雌側端部２ａの幅方向両端で、配管等７の外周面と密着することにより、カバー１の内側を保護する。仮に、カバー１の開口部２２で第２板状片３２の幅方向両端が屈曲部の外周面に干渉した場合、カバー本体２を屈曲部の外周面から離間させ、雄側端部２ｂ（雄側係合片３０）の幅方向両端および雌側端部２ａの幅方向両端と配管等７の屈曲部の外周面との間の隙間が大きくなる。これにより、カバー１の密着度が低下し、開口部２２における隙間を介してカバー１の内側へ水が浸入する等のおそれもある。また、カバー１の開口部２２に段差ができて美観が損なわれるおそれがある。また、雌側端部２ａが配管等７によりカバー外側へ押圧されることで、雄側係合部３ｂを雌側係合部３ａの溝４内へ挿入して係合させる際に適当な挿入角度を維持できなくなり、両係合部３ａ，３ｂを係合させる作業が繁雑になるおそれがある。
The cover 1 of this embodiment is for a bent portion of a pipe 7 or the like. Both the engaging portions 3 a and 3 b are arranged on the inner diameter side of the bent portion of the pipe 7 or the like. On the inner diameter side of the bent portion, the opening 22 of the cover main body 2 is formed at the both ends in the width direction of the male end 2b (male engaging piece 30) and the both ends in the width of the female end 2a. The inner side of the cover 1 is protected by being in close contact with the outer peripheral surface. If both ends in the width direction of the second plate-like piece 32 interfere with the outer peripheral surface of the bent portion at the opening 22 of the cover 1, the cover body 2 is separated from the outer peripheral surface of the bent portion, and the male end 2b (male) The gap between the width direction both ends of the side engagement piece 30) and the width direction both ends of the female side end portion 2a and the outer peripheral surface of the bent portion of the pipe 7 or the like becomes large. As a result, the degree of adhesion of the cover 1 is reduced, and water may enter the inside of the cover 1 through a gap in the opening 22. Moreover, there exists a possibility that a level | step difference may be made in the opening part 22 of the cover 1, and an aesthetics may be impaired. Further, when the female end 2a is pressed to the outside of the cover by the pipe 7 or the like, an appropriate insertion is performed when the male engaging portion 3b is inserted into the groove 4 of the female engaging portion 3a and engaged. There is a possibility that the angle cannot be maintained, and the operation of engaging the engaging portions 3a and 3b becomes complicated.
これに対し、第２板状片３２の幅方向寸法W3を第１板状片３１の幅方向寸法W1〜W2よりも小さくしたため、カバー内側に向うほど雌側係合部３ａの幅方向寸法が小さくなる（幅狭となる）。よって、図７に示すように、雌側係合部３ａのカバー内側の形状が、配管等７の屈曲部の外周面と干渉しにくい形状となる。具体的には、雄側係合部３ｂの係合により溝４が多少広がったとしても、雌側係合部３ａにおける周方向のいずれの部位でも、雌側端部２ａの幅方向両端と第２板状片３２の幅方向両端とを通る曲面の曲率が、配管等７の外周面の曲率よりも小さくなるように設けられている。よって、第２板状片３２の幅方向両端が屈曲部の外周面に干渉することを抑制し、上記のおそれを抑制することが可能である。
On the other hand, since the widthwise dimension W3 of the second plate-like piece 32 is made smaller than the widthwise dimensions W1 to W2 of the first plate-like piece 31, the widthwise dimension of the female-side engaging portion 3a increases toward the inside of the cover. It becomes smaller (becomes narrower). Therefore, as shown in FIG. 7, the shape inside the cover of the female side engaging portion 3a is a shape that hardly interferes with the outer peripheral surface of the bent portion of the pipe 7 or the like. Specifically, even if the groove 4 is somewhat widened by the engagement of the male side engaging portion 3b, the widthwise ends of the female side end portion 2a and the second end of the female side engaging portion 3a may be The curvature of the curved surface passing through both ends in the width direction of the two plate-like pieces 32 is provided so as to be smaller than the curvature of the outer peripheral surface of the pipe 7 or the like. Therefore, it is possible to suppress the both ends in the width direction of the second plate-like piece 32 from interfering with the outer peripheral surface of the bent portion, and to suppress the above-described fear.
また、第１板状片３１の幅方向寸法W1〜W2を雌側端部２ａの幅方向寸法W1よりも若干小さくした。よって、第２板状片３２と同様、第１板状片３１の幅方向両端が屈曲部の外周面に干渉することを抑制することができる。また、上記のように第２板状片３２の幅方向寸法を第１板状片３１の幅方向寸法よりも小さくした場合、カバー内側から見て、第１板状片３１の幅方向両端側が第２板状片３２によって覆われないで露出する。よって、第１板状片３１の幅方向両端縁が人の手等を傷つけるおそれがある。これに対し、第１板状片３１の幅方向両端縁を雌側端部２ａの面内に収めたことで、これらの端縁が人の手等を傷つけるおそれを抑制できる。さらに、第１板状片３１において第２板状片３２と接続する側の幅方向両端の角部を切り欠いてテーパ状とした（切り欠き310）。上記のように第２板状片３２の幅方向寸法W3を第１板状片３１の幅方向寸法W1〜W2よりも小さくした場合、カバー内側から見て、第２板状片３２の第１板状片３１と接続する側の幅方向両端の角部が第１板状片３１によって覆われないで露出する。よって、この角部が人の手等に触れて傷付けたりカバー１の内部の断熱材等に干渉したりするおそれがある。これに対し、この角部を切り欠いてテーパ状としたことで、上記おそれを抑制できる。
Further, the width direction dimensions W1 to W2 of the first plate-like piece 31 are slightly smaller than the width direction dimension W1 of the female side end 2a. Therefore, similarly to the second plate-like piece 32, it is possible to prevent the both ends in the width direction of the first plate-like piece 31 from interfering with the outer peripheral surface of the bent portion. Moreover, when the width direction dimension of the 2nd plate-shaped piece 32 is made smaller than the width direction dimension of the 1st plate-shaped piece 31 as mentioned above, the width direction both ends of the 1st plate-shaped piece 31 are seen from the cover inner side. It is not covered by the second plate-like piece 32 and is exposed. Therefore, there is a possibility that both edges in the width direction of the first plate-shaped piece 31 may hurt human hands and the like. On the other hand, the possibility that these end edges may hurt human hands or the like can be suppressed by storing both end edges in the width direction of the first plate-shaped piece 31 within the surface of the female end 2a. Further, the corners at both ends in the width direction of the first plate-like piece 31 on the side connected to the second plate-like piece 32 are notched to be tapered (notch 310). As described above, when the widthwise dimension W3 of the second plate-like piece 32 is smaller than the widthwise dimensions W1 to W2 of the first plate-like piece 31, the first plate-like piece 32 first is seen from the inside of the cover. The corners at both ends in the width direction on the side connected to the plate-like piece 31 are exposed without being covered by the first plate-like piece 31. Therefore, there is a possibility that the corners may be touched and damaged by human hands or may interfere with the heat insulating material inside the cover 1. On the other hand, the above-mentioned fear can be suppressed by notching this corner part and making it taper shape.
なお、カバー内側に設けられた溝４の底部４０は閉じられており、穴等が設けられていない。よって、溝４の開口部４１から溝４内へ水が浸入したとしても、この溝４内の水が底部４０を通ってカバー１の内側へ至ることは抑制される。よって、カバー１による保護機能を向上することができる。
In addition, the bottom part 40 of the groove | channel 4 provided in the cover inner side is closed, and the hole etc. are not provided. Therefore, even if water intrudes into the groove 4 from the opening 41 of the groove 4, the water in the groove 4 is suppressed from passing through the bottom portion 40 to the inside of the cover 1. Therefore, the protection function by the cover 1 can be improved.
（雌側突起５を第２板状片３２に配置したことによる作用）
第１板状片３１ではなく第２板状片３２の側に雌側突起５を設けたため、この雌側突起５に雄側突起６が係合すると、この係合部位Rを介して第２板状片３２に力が作用する。この力は、溝４の幅を広げる方向の成分を含む。仮に、第２板状片３２における溝４の開口側に雌側突起５を設けた場合、（溝４の幅が広がる際の支点となる）第１板状片３１と第２板状片３２との接続部分Oから、上記力の作用点Rまでの距離L1が長くなる（図１２、図１３参照）。これにより、溝４の幅が広がりやすくなる。このため、雌側係合部３ａと雄側係合部３ｂの係合が外れやすくなる。例えば、雄側係合部３ｂに周方向に並んで複数の雄側突起６を設けた場合、加工の容易性等から、雌側係合部３ａの第２板状片３２の先端部を折り曲げて溝４の開口側に（１つの）雌側突起５を設けることが通常である。しかし、この場合、雌側突起５に複数の雄側突起６（のいずれか）が係合すると、常に溝４の開口側から第２板状片３２に力が作用することになり、溝４の幅が広がりやすい。これに対し、第２板状片３２の面内に複数の雌側突起５を設けているため、この雌側突起５（のいずれか）に雄側突起６が係合しても、上記係合部位Rを介して第２板状片３２に入力される力（溝４の幅を広げる方向の成分を含む）の作用点が、溝４の開口側ではなく溝４の内部側となりやすい。よって上記距離L1が短くなるため、溝４の幅が広がりにくくなる。これにより、雌側係合部３ａと雄側係合部３ｂの係合が外れにくくなる。すなわち、第２板状片３２における溝４の開口側だけでなく底部側にも雌側突起５が設けられており、両突起５，６の係合部位が溝４の開口側になる場合は限られている。よって、溝４の開口側から第２板状片３２に力が作用する確率は低いため、溝４の幅が広がりにくい。
(Operation by arranging the female projection 5 on the second plate-like piece 32)
Since the female projection 5 is provided not on the first plate 31 but on the second plate 32, when the male projection 6 is engaged with the female projection 5, the second projection 5 is engaged via the engagement portion R. A force acts on the plate-like piece 32. This force includes a component in the direction of increasing the width of the groove 4. If the female projection 5 is provided on the opening side of the groove 4 in the second plate-like piece 32, the first plate-like piece 31 and the second plate-like piece 32 (which serve as a fulcrum when the width of the groove 4 widens) are provided. The distance L1 from the connection portion O to the point of action R of the force becomes longer (see FIGS. 12 and 13). Thereby, the width | variety of the groove | channel 4 becomes easy to spread. For this reason, engagement of the female side engaging part 3a and the male side engaging part 3b becomes easy to remove | deviate. For example, when a plurality of male protrusions 6 are provided side by side in the circumferential direction on the male engagement portion 3b, the distal end portion of the second plate-like piece 32 of the female engagement portion 3a is bent for ease of processing. It is usual to provide (one) female projection 5 on the opening side of the groove 4. However, in this case, when a plurality of male projections 6 (any one) are engaged with the female projection 5, a force always acts on the second plate-like piece 32 from the opening side of the groove 4. The width of is easy to spread. On the other hand, since the plurality of female projections 5 are provided in the surface of the second plate-like piece 32, even if the male projection 6 is engaged with any one of the female projections 5, the above-mentioned relationship is established. The point of action of a force (including a component in the direction of increasing the width of the groove 4) input to the second plate-like piece 32 via the joint portion R tends to be on the inner side of the groove 4 instead of the opening side of the groove 4. Therefore, since the distance L1 is shortened, the width of the groove 4 is difficult to expand. Thereby, engagement of the female side engaging part 3a and the male side engaging part 3b becomes difficult to remove | deviate. That is, when the female projection 5 is provided not only on the opening side of the groove 4 in the second plate-shaped piece 32 but also on the bottom side, and the engaging portion of both the protrusions 5 and 6 is on the opening side of the groove 4. limited. Accordingly, since the probability that a force acts on the second plate-like piece 32 from the opening side of the groove 4 is low, the width of the groove 4 is difficult to expand.
また、雌側突起５を第２板状片３２の側に設けたため、雌側突起５を第１板状片３１の側に設けた場合（図９参照）に比べ、各突起５，６のスペースの分だけ、溝４内において雄側係合片３０がカバー外側に位置する。すなわち、雄側係合片３０が第１板状片３１に近づくと共に、第２板状片３２から遠ざかる。よって、溝４の開口部４１の側でも、雄側係合片３０が第２板状片３２と接触しにくくなる。言換えると、溝４内（第１板状片３１の中間側の部位P）を支点として第２板状片３２の先端（溝４の開口部４１）側の部位Qを作用点とする力が作用しにくくなる。よって、溝４の幅が広がりにくい。仮に、溝４の開口部４１の側の部位Qで雄側係合片３０が第２板状片３２と接触し、溝４内の部位Pを支点とし部位Qを作用点とする力が作用する場合でも、雌側突起５を第１板状片３１の側に設けた場合（図９参照）に比べ、溝４内の部位Pの近傍において雄側突起６のスペースの分だけ雄側係合片３０が第２板状片３２から離れてカバー外側に位置する（すなわち、雄側係合片３０が第１板状片３１に近づくと共に、第２板状片３２から遠ざかる）。よって、溝４の開口部４１の側の部位Qにおいて第２板状片３２に対し第１板状片３１がなす角度が大きくなる。これにより、部位Qにおいて溝４の幅を広げる方向の力の成分が減少する。よって、溝４の幅が広がりにくい。また、雌側突起５を第１板状片３１の側に設けた場合（図９参照）と異なり、支点Pが移動可能である（雄側係合片３０の周方向先端部分が第１板状片３１に対してスライド可能である）。上記力の作用に伴い支点Pが移動することで、部位Qにおける上記角度が大きくなるため、部位Qにおいて溝４の幅を広げる方向の力の成分が減少する。よって、溝４の幅が広がりにくい。したがって、雌側係合部３ａと雄側係合部３ｂの係合が外れにくくなる。なお、雌側突起５を第１板状片３１の側に設けた場合に対する雌側突起５を第２板状片３２の側に設けた場合の上記各作用効果は、雄側突起６に突起部６１を設けた場合、すなわち雄側係合片３０に対する雄側突起６の高さh3（図６参照）がある程度高い場合に、顕著となる。
Further, since the female projection 5 is provided on the second plate-like piece 32 side, each of the projections 5 and 6 is compared with the case where the female projection 5 is provided on the first plate-like piece 31 side (see FIG. 9). The male engagement piece 30 is positioned outside the cover in the groove 4 by the amount of space. That is, the male engagement piece 30 approaches the first plate-like piece 31 and moves away from the second plate-like piece 32. Therefore, the male engagement piece 30 is less likely to contact the second plate-like piece 32 even on the opening 41 side of the groove 4. In other words, the force having the site Q on the tip (opening 41 of the groove 4) side of the second plate-like piece 32 with the inside of the groove 4 (the site P on the intermediate side of the first plate-like piece 31) as a fulcrum. Becomes difficult to act. Therefore, the width of the groove 4 is difficult to expand. Temporarily, the male side engagement piece 30 contacts the 2nd plate-shaped piece 32 in the site | part Q by the side of the opening part 41 of the groove | channel 4, and the force which uses the site | part P in the groove | channel 4 as a fulcrum and the site | part Q acts as an action. Even when the female side protrusion 5 is provided on the first plate-like piece 31 side (see FIG. 9), the male side engagement is increased by the space of the male side protrusion 6 in the vicinity of the portion P in the groove 4. The joining piece 30 is separated from the second plate-like piece 32 and is located outside the cover (that is, the male engagement piece 30 approaches the first plate-like piece 31 and moves away from the second plate-like piece 32). Therefore, the angle formed by the first plate-like piece 31 with respect to the second plate-like piece 32 in the portion Q on the opening 41 side of the groove 4 is increased. As a result, the force component in the direction of expanding the width of the groove 4 in the portion Q decreases. Therefore, the width of the groove 4 is difficult to expand. Further, unlike the case where the female projection 5 is provided on the first plate-like piece 31 side (see FIG. 9), the fulcrum P is movable (the circumferential tip of the male engagement piece 30 is the first plate). Slidable with respect to the strip 31). As the fulcrum P moves in accordance with the action of the force, the angle at the part Q increases, so that the force component in the direction of widening the groove 4 at the part Q decreases. Therefore, the width of the groove 4 is difficult to expand. Therefore, it becomes difficult to disengage the female side engaging portion 3a and the male side engaging portion 3b. In addition, each said effect in the case of providing the female side protrusion 5 in the 2nd plate-shaped piece 32 side with respect to the case where the female side protrusion 5 is provided in the 1st plate-shaped piece 31 side protrudes in the male side protrusion 6. FIG. When the portion 61 is provided, that is, when the height h3 (see FIG. 6) of the male projection 6 with respect to the male engagement piece 30 is high to some extent, this becomes remarkable.
なお、第２板状片３２に雌側突起５をポケット状に複数形成した場合、第２板状片３２の曲げ方向の剛性が高まり、第２板状片３２が曲げられ難くなる。このため、雌側係合部３ａの溝４の開口部４１が広がりにくくなる。よって、溝４が広がった状態で係合することを抑制し、係合を外れにくくすることができる。一方、ポケット状の雌側突起５が設けられていない第１板状片３１にアールを付けることが容易となる。
If a plurality of female projections 5 are formed in the second plate-like piece 32 in a pocket shape, the rigidity in the bending direction of the second plate-like piece 32 is increased, and the second plate-like piece 32 is difficult to bend. For this reason, the opening part 41 of the groove | channel 4 of the female side engaging part 3a becomes difficult to spread. Therefore, it can suppress engaging in the state where the groove | channel 4 was expanded, and can make it difficult to remove | engage. On the other hand, it becomes easy to give a round to the 1st plate-shaped piece 31 in which the pocket-shaped female side protrusion 5 is not provided.
また、第２板状片３２の面内に局所的に切れ目500を付けることで雌側突起５を形成した場合、この切れ目500がカバー１の外側に露出していると、この切れ目500を通って外部からカバー１の内側に水が浸入するおそれがある。これに対し、上記のように、雌側突起５（切れ目500）がカバー１の外側に露出することを抑制できる。具体的には、複数の雌側突起５は雌側端部２ａおよび第１板状片３１により覆い隠され、カバー１の外側に露出しない。よって、両端部２ａ，２ｂの係合部位において、切れ目500からカバー１の内側に水が浸入することを抑制することができる。したがって、カバー１による保護機能を向上することができる。
Further, when the female projection 5 is formed by locally making a cut 500 in the surface of the second plate-like piece 32, if the cut 500 is exposed to the outside of the cover 1, the cut 500 passes through the cut 500. There is a risk that water may enter the inside of the cover 1 from the outside. On the other hand, as described above, the female-side protrusion 5 (cut 500) can be prevented from being exposed to the outside of the cover 1. Specifically, the plurality of female-side protrusions 5 are covered and hidden by the female-side end portion 2 a and the first plate-like piece 31 and are not exposed to the outside of the cover 1. Therefore, it is possible to prevent water from entering the cover 1 from the cut 500 at the engagement portions of the both end portions 2a and 2b. Therefore, the protection function by the cover 1 can be improved.
なお、カバー１を配管等に設置した状態で、溝４の開口部４１にコーキング剤（シール剤）を充填してこれを塞ぐ（シールする）ことは可能であるが、経年劣化したり剥がれたりする等によりコーキング剤の防水機能には限界がある。また、溝４の開口部にそもそもコーキング剤を充填しない場合もある。よって、水が溝４内を通ってカバー１の内側に浸入するおそれもある。本実施例では、雌側係合部３ａをカバー１の内側に配置している。このため、溝４内に浸入した水が第２板状片３２の面内に形成された切れ目500を通ってカバー１の内側に浸入することも考えられる。しかし、上記のように、雌側突起５を溝４の内部に設けること等により、溝４の幅が広がりにくい。よって、開口部４１から溝４内への水の浸入が抑制される。また、雄側係合片３０と第１板状片３１との密着度が高く、雌側突起５と雄側突起６との係合部位の近傍における溝４の幅が広がりにくい。よって、雄側係合片３０と第１板状片３１との間の隙間を通った水の浸入が抑制される。また、第１板状片３１と第２板状片３２が雄側係合部３ｂ（雄側突起６）を挟み込む弾性力に加えて、カバー外側に広がろうとする顎部２１の弾性力により、溝４の内部において、雄側係合部３ｂ（周方向先端部分）のカバー外側の面と、（溝４内に面する）第１板状片３１のカバー内側の面との接触が強化される。よって、この接触部位Pで両者が密着してシール性が担保される。これにより、溝４の開口部４１から雄側係合片３０と第１板状片３１との間の隙間に浸入した水が上記接触部位Pにおける隙間を通って溝４の底部４０側に浸入したり第２板状片３２の側へ回り込んだりすることが抑制される。よって、第２板状片３２の面内に形成された切れ目500を通ってカバー１の内側へ水が浸入することが抑制される。
In addition, it is possible to fill the opening 41 of the groove 4 with a caulking agent (sealant) and close (seal) it with the cover 1 installed on a pipe or the like, but it may deteriorate over time or peel off. As a result, the waterproofing function of the caulking agent is limited. Further, the caulking agent may not be filled in the opening of the groove 4 in the first place. Therefore, water may enter the inside of the cover 1 through the groove 4. In the present embodiment, the female side engaging portion 3 a is disposed inside the cover 1. For this reason, it is also conceivable that the water that has entered the groove 4 enters the inside of the cover 1 through the cut 500 formed in the surface of the second plate-like piece 32. However, as described above, the width of the groove 4 is not easily increased by providing the female projection 5 inside the groove 4 or the like. Therefore, the intrusion of water from the opening 41 into the groove 4 is suppressed. Further, the degree of close contact between the male side engaging piece 30 and the first plate-like piece 31 is high, and the width of the groove 4 in the vicinity of the engaging portion between the female side protrusion 5 and the male side protrusion 6 is difficult to expand. Therefore, the infiltration of water through the gap between the male engagement piece 30 and the first plate-like piece 31 is suppressed. Further, in addition to the elastic force between the first plate-like piece 31 and the second plate-like piece 32 sandwiching the male side engaging portion 3b (male side protrusion 6), the elastic force of the jaw portion 21 that attempts to spread outside the cover. In the inside of the groove 4, the contact between the outer surface of the male engaging portion 3 b (circumferential tip) and the inner surface of the first plate 31 (facing in the groove 4) is enhanced. Is done. Therefore, both of them are brought into close contact with each other at the contact portion P to ensure the sealing performance. Thus, water that has entered the gap between the male engagement piece 30 and the first plate-like piece 31 from the opening 41 of the groove 4 enters the bottom 40 side of the groove 4 through the gap at the contact site P. Or wrapping around the second plate-like piece 32 is suppressed. Therefore, it is possible to prevent water from entering the inside of the cover 1 through the cut 500 formed in the surface of the second plate-like piece 32.
すなわち、雄側係合片３０や第１板状片３１に切れ目が形成されていないため、溝４の開口部４１から雄側係合片３０と第１板状片３１との間の隙間に浸入した水が第２板状片３２の切れ目500へ向う経路は、上記接触部位Pにおける隙間か、または雄側係合片３０と雌側端部２ａとの間の隙間であって第１板状片３１が設けられていない部位（図５のγに示す、幅方向で第１板状片３１の両端より外側）を通るものに限られる。よって、上記接触部位Pにおける接触が強化されることで、上記経路が効果的に遮断されるため、シール性が担保される。なお、第１板状片３１の幅方向寸法W1〜W2は、雄側係合部３ｂ（周方向先端部分）の幅方向寸法W1より若干小さいだけである。よって、雄側係合片３０と雌側端部２ａとの間の隙間であって第１板状片３１が設けられていない部位γ（幅方向で第１板状片３１の両端より外側）を通る水の浸入も抑制されるため、シール性が担保される。
That is, since no cut is formed in the male side engaging piece 30 or the first plate-like piece 31, the gap between the male side engaging piece 30 and the first plate-like piece 31 from the opening 41 of the groove 4. The path of the infiltrated water toward the cut 500 of the second plate-like piece 32 is the gap at the contact site P or the gap between the male engagement piece 30 and the female end 2a, and the first plate. It is limited to passing through a portion where the shaped piece 31 is not provided (shown by γ in FIG. 5, outside the both ends of the first plate-like piece 31 in the width direction). Therefore, since the said path | route is interrupted | blocked effectively by the contact in the said contact part P, a sealing performance is ensured. In addition, the width direction dimensions W1 to W2 of the first plate-like piece 31 are only slightly smaller than the width direction dimension W1 of the male side engaging portion 3b (circumferential tip portion). Accordingly, a portion γ that is a gap between the male-side engagement piece 30 and the female-side end portion 2a and is not provided with the first plate-like piece 31 (outside from both ends of the first plate-like piece 31 in the width direction). Since the infiltration of water passing through is suppressed, sealing performance is ensured.
（雄側突起６の形状や配置による作用）
雄側係合片３０に周方向一方側で連続する板状部分が折り返されることで雄側突起６が形成されている。すなわち、雄側係合部３ｂの周方向先端側に雄側突起６が設けられている。仮に、雄側係合部３ｂの周方向先端側に雄側突起６を設けず、例えば雄側係合部３ｂの周方向中間側に雄側突起６を設けた場合、雌側係合部３ａの溝４を構成する第１板状片３１や第２板状片３２の周方向長さは、周方向に複数の雌側突起５を設けるための長さに加え、雄側係合部３ｂにおける雄側突起６よりも周方向先端側に延びる分（例えば溝４の底部４０に雄側係合部３ｂの周方向先端が突き当たった状態における雄側係合部３ｂの周方向先端（溝４の底部４０）から雄側突起６までの距離の分）だけ、余計に必要となる。これに対し、雄側係合部３ｂの周方向先端側に雄側突起６を設けたため、第１板状片３１や第２板状片３２の長さとして、複数の雌側突起５を周方向に設けるために必要な長さ以外の分を削減可能である。よって、材料を余分に必要とせずにコストを抑制できると共に、雌側係合部３ａを小型化することができる。
(Operation by the shape and arrangement of the male projection 6)
The male projection 6 is formed by folding back a plate-like portion that is continuous with the male engagement piece 30 on one side in the circumferential direction. That is, the male side protrusion 6 is provided on the distal end side in the circumferential direction of the male side engaging portion 3b. If the male projection 6 is not provided on the circumferential front end side of the male engagement portion 3b, and the male projection 6 is provided on the circumferential middle side of the male engagement portion 3b, for example, the female engagement portion 3a. The circumferential lengths of the first plate-like piece 31 and the second plate-like piece 32 constituting the groove 4 are in addition to the length for providing the plurality of female-side projections 5 in the circumferential direction, and the male-side engaging portion 3b. (For example, the circumferential tip of the male engaging portion 3b in the state where the circumferential tip of the male engaging portion 3b abuts against the bottom 40 of the groove 4 (groove 4). The distance from the bottom 40) to the male projection 6 is required more. On the other hand, since the male side protrusion 6 is provided on the circumferential front end side of the male side engaging portion 3b, the length of the first plate-like piece 31 and the second plate-like piece 32 is set so as to surround the plurality of female-side protrusions 5. It is possible to reduce the amount other than the length necessary for providing in the direction. Therefore, the cost can be suppressed without requiring extra material, and the female side engaging portion 3a can be downsized.
雄側係合部３ｂの周方向先端部分が折り返されることで雄側突起６（基端部６０）が形成されている。よって、雄側係合部３ｂの周方向先端側の強度を向上できる。また、雄側係合部３ｂの周方向先端側が丸みを帯びた曲面状になる。このため、カバー１の取扱い時に、雄側係合部３ｂの周方向先端側が人の手等を傷つけるおそれを低減できる。また、雄側係合部３ｂを雌側係合部３ａの溝４の開口部４１から溝４内に挿入しやすくなる。よって、カバー１の取付け作業性を向上することができる。また、上記のように、雄側係合部３ｂの周方向先端部分のカバー外側の面と第１板状片３１のカバー内側の面とが接触する場合、雄側係合部３ｂの周方向先端が丸みを帯びた曲面状になることで、上記接触部位Pにおける両者の密着性が向上する。よって、シール性を向上することができる。ここで、基端部６０は、幅方向で雄側係合部３ｂの先端側の全範囲にわたって設けられている。よって、上記作用効果を向上できる。
The male side protrusion 6 (base end part 60) is formed by folding back the circumferential front end portion of the male side engaging part 3b. Therefore, the strength of the front end side in the circumferential direction of the male side engaging portion 3b can be improved. Further, the distal end side in the circumferential direction of the male side engaging portion 3b has a rounded curved surface. For this reason, at the time of handling of the cover 1, the possibility that the distal end side in the circumferential direction of the male side engaging portion 3b may injure a human hand or the like can be reduced. Moreover, it becomes easy to insert the male side engaging part 3b into the groove | channel 4 from the opening part 41 of the groove | channel 4 of the female side engaging part 3a. Therefore, the workability of attaching the cover 1 can be improved. Further, as described above, when the outer surface of the cover at the distal end portion in the circumferential direction of the male side engaging portion 3b and the inner surface of the cover of the first plate-like piece 31 are in contact, the circumferential direction of the male side engaging portion 3b. Since the tip has a rounded curved surface, the adhesion between the two at the contact site P is improved. Therefore, sealing performance can be improved. Here, the base end part 60 is provided over the whole range of the front end side of the male side engaging part 3b in the width direction. Therefore, the said effect can be improved.
雌側突起５は、第２板状片３２の一部分を、溝４内に突出する山形に変形させることで、形成されている。この場合、雌側突起５の幅方向における両端が（突出元となる）第２板状片３２の面に連続することになるため、加工の都合上、雌側突起５の高さ（溝４内に突出する当接面502の中間部504の高さ）を一定以上高くする（当接面502の突出量をある程度以上増やす）ことが困難である。よって、溝４内において雄側突起６（の先端）を雌側突起５（の当接面502）に十分に近づけることが困難となり、両突起５，６の係合が外れやすくなるおそれがある。特に、雌側係合部３ａをカバー１の内側に配置すると共に、雌側突起５を第２板状片３２に配置した場合には、雌側端部２ａないし雄側端部２ｂがカバー外側に広がろうとすることにより、溝４内において、雄側係合部３ｂの周方向先端部分（雄側突起６の先端）が第２板状片３２（雌側突起５の当接面502）から離れてカバー外側へ変位しがちである。よって、上記おそれが高い。
The female projection 5 is formed by deforming a part of the second plate-like piece 32 into a mountain shape protruding into the groove 4. In this case, since both ends in the width direction of the female projection 5 are continuous with the surface of the second plate-like piece 32 (which is the projection source), the height of the female projection 5 (groove 4) for convenience of processing. It is difficult to increase the height of the intermediate portion 504 of the contact surface 502 protruding inward by a certain level or more (increase the amount of protrusion of the contact surface 502 to some extent). Therefore, it is difficult to bring the male projection 6 (the tip) into the groove 4 sufficiently close to the female projection 5 (the contact surface 502), and the engagement between the projections 5 and 6 may be easily released. . In particular, when the female side engaging portion 3a is arranged inside the cover 1 and the female side projection 5 is arranged on the second plate-like piece 32, the female side end portion 2a to the male side end portion 2b are located outside the cover. In the groove 4, the distal end portion in the circumferential direction of the male engagement portion 3 b (the distal end of the male projection 6) is the second plate-like piece 32 (the contact surface 502 of the female projection 5) in the groove 4. Tends to move away from the outside of the cover. Therefore, the fear is high.
これに対し、雄側突起６の突起部６１は、雄側係合片３０とは反対の側に（すなわち雄側係合片３０から遠ざかるように）基端部６０に対し折れ曲がっている。これにより、雄側係合部３ｂが溝４内に挿入された状態で、突起部６１は、雄側係合片３０に対向する第２板状片３２へ向って延びることとなる。よって、雄側突起６の突起部６１の先端を、溝４内に突出する雌側突起５の当接面502に近づけることができる。したがって、より確実に雄側突起６を雌側突起５に係合させることができるため、係合が外れにくい。なお、基端部６０に対する突起部６１の（折れ曲がり）角度は、突起部６１の先端が雌側突起５の当接面502に当接可能な範囲であればよく、本実施例の角度に限定されない。また、突起部６１は基端部６０に対する折れ曲がり部位から必ずしも周方向の他方側に延びていなくてもよい。また、突起部６１の先端を更に折り曲げる等によってその形状を変化させることは妨げられない。また、雄側係合部３ｂの周方向先端側ではなく周方向中間側に雄側突起６を設けたとしても、その突起部６１の形状を本実施例のように設ければ、同様の作用効果を得ることができる。例えば、雄側係合片３０の周方向中間側に切れ目を付けてこれを折り返し、基端部６０と突起部６１を形成することで、この部位に雄側突起６を設けることも可能である。
On the other hand, the protrusion 61 of the male protrusion 6 is bent with respect to the base end 60 on the side opposite to the male engagement piece 30 (ie, away from the male engagement piece 30). Accordingly, the protrusion 61 extends toward the second plate-like piece 32 facing the male side engaging piece 30 in a state where the male side engaging portion 3 b is inserted into the groove 4. Therefore, the tip of the protrusion 61 of the male protrusion 6 can be brought close to the contact surface 502 of the female protrusion 5 protruding into the groove 4. Therefore, since the male projection 6 can be more reliably engaged with the female projection 5, it is difficult to disengage. In addition, the angle of the bent portion 61 with respect to the base end portion 60 may be in a range in which the tip of the protruding portion 61 can be in contact with the contact surface 502 of the female side protrusion 5, and is limited to the angle of the present embodiment. Not. Further, the protrusion 61 may not necessarily extend from the bent portion with respect to the base end portion 60 to the other side in the circumferential direction. Further, it is not hindered to change the shape of the protrusion 61 by further bending the tip. Even if the male projection 6 is provided not on the circumferential tip of the male engagement portion 3b but on the middle side in the circumferential direction, the same effect can be obtained if the shape of the projection 61 is provided as in this embodiment. An effect can be obtained. For example, it is also possible to provide the male projection 6 at this portion by forming a base end 60 and a projection 61 by making a cut in the circumferential intermediate side of the male engagement piece 30 and turning it back. .
なお、雌側突起５は、周方向または幅方向で複数設けられていなくてもよい。雌側突起５（当接面502）は、第２板状片３２の面内に局所的に切れ目500を付けて切り起こすことにより形成したものに限らず、例えば、第２板状片３２の先端部を周方向から見たとき幅方向で蛇行する波形に加工し、この先端部を第２板状片３２の本体に対向するよう折り返すことで幅方向に複数並んで形成したものでもよい。すなわち、第２板状片３２に連続する板状片の一部分を山形に変形させることで、雌側突起５を形成することとしてもよい。また、幅方向に限らず、第２板状片３２（に連続する板状片）の面に平行な所定方向において雌側突起５の両端が第２板状片３２（に連続する板状片）の面に連続するように雌側突起５を形成することとしてもよい。言換えると、当接面502は幅方向に広がるものに限らず、幅方向に対し所定の角度を有していてもよい。
Note that a plurality of female-side protrusions 5 may not be provided in the circumferential direction or the width direction. The female-side protrusion 5 (contact surface 502) is not limited to the one formed by locally raising the cut 500 in the surface of the second plate-like piece 32, and for example, the second plate-like piece 32 of the second plate-like piece 32. The tip portion may be formed into a waveform that meanders in the width direction when viewed from the circumferential direction, and the tip portion is folded back so as to face the main body of the second plate-like piece 32 to be formed side by side in the width direction. That is, the female projection 5 may be formed by deforming a part of the plate-like piece continuous to the second plate-like piece 32 into a mountain shape. Further, not only in the width direction, but in the predetermined direction parallel to the surface of the second plate-like piece 32 (the plate-like piece continuous), both ends of the female projection 5 are the plate-like pieces continuous to the second plate-like piece 32 ( It is good also as forming the female side protrusion 5 so that it may continue to the surface of). In other words, the contact surface 502 is not limited to the one that extends in the width direction, and may have a predetermined angle with respect to the width direction.
また、カバー１は、配管等の直線部を覆うためのラッキングカバーであってもよい。
本実施例のカバー１は、配管等の屈曲部を覆うためのエルボ用カバーであって、幅方向で係合部３が占める範囲が限定されているため、係合が外れるおそれが比較的高い。よって、雄側突起６（突起部６１）の形状によって係合を外れにくくする上記作用効果を、より効果的に得ることができる。
The cover 1 may be a racking cover for covering a straight portion such as a pipe.
The cover 1 according to the present embodiment is an elbow cover for covering a bent portion such as a pipe, and the range occupied by the engaging portion 3 in the width direction is limited. Therefore, the possibility of disengagement is relatively high. . Therefore, the above-described operation effect that makes it difficult to disengage due to the shape of the male projection 6 (projection 61) can be obtained more effectively.
ここで、雄側突起６の突起部６１は、雌側突起５の当接面502よりも幅方向寸法が大きい直線状（板状）である。よって、雄側係合部３ｂが雌側係合部３ａに対して幅方向で若干ズレても、雄側突起６の突起部６１と雌側突起５の当接面502との当接が確保されるため、係合が外れにくい。また、突起部６１は、幅方向で第２板状片３２の全範囲と重なるように設けられている。よって、突起部６１の幅方向寸法を大きくすることでその強度を向上できる。また、係合を外れにくくする上記作用効果を向上できる。また、突起部６１の幅方向寸法を第１板状片３１の幅方向寸法W1〜W2よりも小さくした。よって、両係合部３ａ，３ｂが係合した状態で、カバー１の開口部２２において、第２板状片３２の幅方向両端と同様、突起部６１の幅方向両端が配管等７の屈曲部の外周面（断熱材等）に干渉しにくくなる。これにより、雄側端部２ｂ（雄側係合片３０）および雌側端部２ａの幅方向両端と屈曲部の外周面との間に隙間ができる事態が抑制される。したがって、カバー１の密着度を高め、カバー１による保護機能を向上することができる。具体的には、突起部６１の幅方向寸法を第２板状片３２の幅方向寸法W3と略等しくした。よって、雄側突起６と雌側突起５とをより確実に係合させつつ、上記効果を得ることができる。
Here, the protrusion 61 of the male protrusion 6 has a linear shape (plate shape) having a larger width dimension than the contact surface 502 of the female protrusion 5. Therefore, even if the male engagement portion 3b is slightly shifted in the width direction with respect to the female engagement portion 3a, the contact between the protrusion 61 of the male protrusion 6 and the contact surface 502 of the female protrusion 5 is ensured. Therefore, it is difficult to disengage. Further, the protrusion 61 is provided so as to overlap the entire range of the second plate-like piece 32 in the width direction. Therefore, the strength can be improved by increasing the widthwise dimension of the protrusion 61. Moreover, the said effect which makes it difficult to disengage can be improved. Moreover, the width direction dimension of the protrusion 61 was made smaller than the width direction dimensions W1 to W2 of the first plate-like piece 31. Therefore, in the state where both the engaging portions 3a and 3b are engaged, in the opening portion 22 of the cover 1, the both ends in the width direction of the projecting portion 61 are bent of the pipe 7 or the like, similarly to both ends in the width direction of the second plate piece 32 It becomes difficult to interfere with the outer peripheral surface (heat insulating material etc.) of the part. Thereby, the situation where a clearance gap is formed between the width direction both ends of the male side edge part 2b (male side engaging piece 30) and the female side edge part 2a, and the outer peripheral surface of a bending part is suppressed. Therefore, the adhesion degree of the cover 1 can be increased, and the protection function by the cover 1 can be improved. Specifically, the widthwise dimension of the protrusion 61 is made substantially equal to the widthwise dimension W3 of the second plate-like piece 32. Therefore, the above-mentioned effect can be obtained while the male projection 6 and the female projection 5 are more reliably engaged.
雌側突起５は、第２板状片３２の面内に複数、周方向に並んで設けられている。雄側突起６の突起部６１は、基端部６０に対し雄側係合片３０とは反対側へ折れ曲がっており、この折れ曲がり部位から周方向他方側に延びる。これにより、ある雌側突起５に雄側突起６が係合する際、この雌側突起５に周方向で隣接する雌側突起５と雄側突起６とが干渉することが抑制される。具体的には、ある雌側突起５の当接面502に雄側突起６の突起部６１の先端が当接した状態で、この突起部６１の周方向中間部が、上記雌側突起５に周方向一方側で隣接する雌側突起５の後背部501に乗り上げることが抑制されるため、上記干渉が抑制される。言換えると、雄側突起６の突起部６１が当接する雌側突起５に周方向一方側で隣接する雌側突起５が、雄側突起６の突起部６１と基端部６０との間に形成される凹部内に部分的に収容されることで、上記干渉が抑制される。よって、雄側突起６の突起部６１の先端は、雌側突起５の当接面502の先端側（第２板状片３２から遠い側）でなく根元側（第２板状片３２に近い側）に当接することができる。言換えると、雄側突起６は、周方向で隣接する雌側突起５間に形成される隙間における、より深い位置で係合することができる。よって、係合が外れにくい。
A plurality of female projections 5 are provided in the circumferential direction in the second plate-like piece 32. The protrusion 61 of the male protrusion 6 is bent toward the opposite side of the male engagement piece 30 with respect to the base end 60, and extends from the bent portion to the other circumferential side. Thereby, when the male projection 6 is engaged with a certain female projection 5, interference between the female projection 5 and the male projection 6 adjacent to the female projection 5 in the circumferential direction is suppressed. Specifically, in the state where the tip of the projection 61 of the male projection 6 is in contact with the contact surface 502 of a certain female projection 5, the circumferential intermediate portion of the projection 61 is in contact with the female projection 5. The interference is suppressed because it is suppressed to ride on the back portion 501 of the female projection 5 adjacent on one side in the circumferential direction. In other words, the female projection 5 adjacent on one side in the circumferential direction to the female projection 5 with which the projection 61 of the male projection 6 abuts is located between the projection 61 and the base end 60 of the male projection 6. The interference is suppressed by being partially accommodated in the formed recess. Therefore, the tip of the projection 61 of the male projection 6 is not the tip of the contact surface 502 of the female projection 5 (the side far from the second plate 32) but the base (close to the second plate 32). Side). In other words, the male projection 6 can be engaged at a deeper position in the gap formed between the female projections 5 adjacent in the circumferential direction. Therefore, it is difficult to disengage.
なお、より深い位置での係合を実現するために、図８に示すように、任意の係合段で、第２板状片３２の面（雄側突起６が係合する雌側突起５における第２板状片３２の接平面）に対する雄側突起６の突起部６１の角度αが、第２板状片３２の面に対する雌側突起５の後背部501の（望ましくは最大の）角度βよりも大きくなるように設定することが好ましい。また、第２板状片３２の面に対する雌側突起５の高さh1（図６参照）よりも、雄側係合片３０の（周方向先端側の）面に直交する方向における基端部６０に対する突起部６１の高さh2のほうを大きく設定することが好ましい。
In order to realize engagement at a deeper position, as shown in FIG. 8, the surface of the second plate-like piece 32 (female-side projection 5 with which the male-side projection 6 is engaged) at an arbitrary engagement stage. The angle α of the projection 61 of the male projection 6 with respect to the tangent plane of the second plate-like piece 32 in FIG. 5 is the (desirably maximum) angle of the back portion 501 of the female-side projection 5 with respect to the surface of the second plate-like piece 32. It is preferable to set so as to be larger than β. Further, the base end portion in the direction perpendicular to the surface (on the distal end side in the circumferential direction) of the male engagement piece 30 rather than the height h1 (see FIG. 6) of the female projection 5 with respect to the surface of the second plate-like piece 32. It is preferable that the height h2 of the protrusion 61 with respect to 60 is set larger.
基端部６０は、雄側係合片３０に対する折り返し部位から雄側係合片３０に近づくように周方向他方側に延びる。これにより、雄側係合片３０に対する、基端部６０と突起部６１とを含めた雄側突起６全体としての高さh3（図６参照）が増大することを抑制できる。よって、雄側係合部３ｂと雌側係合部３ａが係合した状態での溝４の幅を狭くし、雌側係合部３ａ（第２板状片３２）がカバー内側に突出する（膨らむ）ことを抑制することができる。言換えると、雄側突起６全体としての高さh3はそのままで、突起部６１を長くする（高さh2を大きく設定する）ことができるため、溝４の幅が広がることを抑制しつつ、より深い位置での係合を実現できる。また、雌形突起との係合により雄側突起６に入力される力に対し、基端部６０がばねとして機能し、雄側突起６（基端部６０）の塑性変形を抑制する弾性力を発生する。よって、雄側突起６の強度を向上することができるため、雄側係合部３ｂ（雄側突起６）と雌側係合部３ａ（雌側突起５）との係合が外れにくい。
The base end portion 60 extends to the other side in the circumferential direction so as to approach the male side engagement piece 30 from the folded portion with respect to the male side engagement piece 30. Thereby, it can suppress that the height h3 (refer FIG. 6) as the whole male side protrusion 6 including the base end part 60 and the projection part 61 with respect to the male side engaging piece 30 increases. Therefore, the width of the groove 4 in a state where the male side engaging part 3b and the female side engaging part 3a are engaged is reduced, and the female side engaging part 3a (second plate-like piece 32) protrudes inside the cover. (Swelling) can be suppressed. In other words, while the height h3 of the male projection 6 as a whole can be kept as it is, the projection 61 can be lengthened (the height h2 is set to be large), so that the width of the groove 4 can be prevented from expanding, Engagement at a deeper position can be realized. In addition, the base end portion 60 functions as a spring against the force input to the male projection 6 by engagement with the female projection, and an elastic force that suppresses plastic deformation of the male projection 6 (base end portion 60). Is generated. Therefore, since the strength of the male projection 6 can be improved, the engagement between the male engagement portion 3b (male projection 6) and the female engagement portion 3a (female projection 5) is difficult to disengage.
［効果］
以下、本実施例のカバー１が奏する効果を列挙する。
（１）配管等７（断熱材が巻き付けられた配管）の屈曲部を覆うためのエルボ用カバー１であって、
配管の軸を取り囲む周方向で対向し互いに係合される一対の板状の端部２ａ，２ｂを備え、
雌側端部２ａ（一方の端部）に雌側係合部３ａが設けられると共に、雄側端部２ｂ（他方の端部）に雄側係合部３ｂが設けられ、
雌側係合部３ａは、
雌側端部２ａに連続する板状部分であって、雌側端部２ａに対向するようにカバー内側（配管等７の側）へ折り返し、この折り返し部位から周方向の一方側に延びる第１板状片３１と、
第１板状片３１に連続する板状部分であって、第１板状片３１に対向するように第１板状片３１を挟んで雌側端部２ａとは反対の側へ折り返し、この折り返し部位から周方向の他方側に延びる第２板状片３２と、
第１板状片３１と第２板状片３２との間の隙間であって、第１板状片３１と第２板状片３２との接続部分が閉じられた底部４０を構成する溝４と、
第２板状片３２の面内に複数、周方向に並んで設けられ、溝４内に突出する雌側突起５とを有し、
雄側係合部３ｂは、
雄側端部２ｂに連続して周方向一方側に延びる板状部分であって溝４内に挿入される雄側係合片３０と、
雄側係合片３０が溝４内から抜き取られる方向で雌側突起５に係合可能に設けられた雄側突起６とを有している。
よって、配管等７の寸法に合わせてカバー１の寸法を調整可能であるため、カバー１による保護機能を向上することができる。また、雌側係合部３ａをカバー内側へ配置したことで、美観を向上することができる。また、複数の雌側突起５の一部がカバー１の外周面や内周面に露出することを抑制することができる。また、雌側突起５の上記配置により、雄側突起６（雄側係合部３ｂ）と雌側突起５（雌側係合部３ａ）との係合を外れにくくすることができる。特に、雌側突起５を第２板状片３２の側に設けたことで、溝４の開口部４１の側で第２板状片３２に力が作用することを抑制できるため、溝４が広がりにくい。よって、係合を外れにくくし、カバー１による保護機能を向上することができる。
[effect]
Hereafter, the effect which the cover 1 of a present Example show | plays is enumerated.
(1) An elbow cover 1 for covering a bent portion of a pipe or the like 7 (a pipe around which a heat insulating material is wound),
A pair of plate-like ends 2a and 2b which are opposed to each other in the circumferential direction surrounding the axis of the pipe and are engaged with each other;
A female-side engagement portion 3a is provided at the female-side end portion 2a (one end portion), and a male-side engagement portion 3b is provided at the male-side end portion 2b (the other end portion).
The female side engaging portion 3a is
A plate-like portion that is continuous with the female end 2a, and is folded back to the inside of the cover (on the side of the pipe 7 etc.) so as to face the female end 2a, and extends from the folded portion to one side in the circumferential direction. A plate-shaped piece 31;
It is a plate-like portion that is continuous with the first plate-like piece 31, and is folded back to the side opposite to the female end 2a with the first plate-like piece 31 sandwiched so as to face the first plate-like piece 31. A second plate-like piece 32 extending from the folded portion to the other side in the circumferential direction;
A groove 4 between the first plate-like piece 31 and the second plate-like piece 32 and constituting the bottom portion 40 where the connecting portion between the first plate-like piece 31 and the second plate-like piece 32 is closed. When,
A plurality of female projections 5 provided in the circumferential direction in the surface of the second plate-like piece 32 and projecting into the groove 4,
The male side engaging portion 3b is
A male-side engagement piece 30 which is a plate-like portion extending continuously to one side in the circumferential direction continuously to the male-side end 2b and inserted into the groove 4;
The male side engaging piece 30 has a male side protrusion 6 provided so as to be engageable with the female side protrusion 5 in the direction of being extracted from the groove 4.
Therefore, since the dimension of the cover 1 can be adjusted in accordance with the dimension of the pipe 7 or the like, the protection function by the cover 1 can be improved. Moreover, the beauty | look can be improved by arrange | positioning the female side engaging part 3a inside a cover. Moreover, it can suppress that some of the some female side protrusion 5 is exposed to the outer peripheral surface and inner peripheral surface of the cover 1. FIG. Further, the above arrangement of the female projection 5 makes it difficult to disengage the male projection 6 (male engagement portion 3b) from the female projection 5 (female engagement portion 3a). In particular, by providing the female projection 5 on the second plate-like piece 32 side, it is possible to suppress the force from acting on the second plate-like piece 32 on the opening 41 side of the groove 4. Difficult to spread. Therefore, it is difficult to disengage and the protection function by the cover 1 can be improved.
（２）雌側突起５は、第２板状片３２の一部分を、溝４内に突出する山形に変形させた形状であり、
雄側突起６は、
雄側係合片３０に連続する板状部分であって、雄側係合片３０に対向するように折り返し、この折り返し部位から周方向他方側に延びる基端部６０と、
基端部６０に連続する板状部分であって、基端部６０に対し雄側係合片３０とは反対の側へ折れ曲がる突起部６１とを有する。
よって、雄側突起６の上記形状により、雄側突起６（雄側係合部３ｂ）と雌側突起５（雌側係合部３ａ）との係合を外れにくくすることができるため、カバー１による保護機能を向上することができる。
(2) The female projection 5 has a shape obtained by deforming a part of the second plate-shaped piece 32 into a mountain shape protruding into the groove 4.
The male projection 6 is
A plate-like portion continuous to the male engagement piece 30, folded back so as to face the male engagement piece 30, and a base end portion 60 extending from the folded portion to the other circumferential side;
A plate-like portion that is continuous with the base end portion 60 and has a protrusion 61 that bends to the side opposite to the male engagement piece 30 with respect to the base end portion 60.
Therefore, the male protrusion 6 (male engaging part 3b) and the female protrusion 5 (female engaging part 3a) can be made difficult to disengage due to the shape of the male protrusion 6, so that the cover 1 can be improved.
（３）配管等７（断熱材が巻き付けられた配管）の屈曲部を覆うためのエルボ用カバー１であって、
配管の軸を取り囲む周方向で対向し互いに係合される一対の板状の端部２ａ，２ｂを備え、
雌側端部２ａ（一方の端部）に雌側係合部３ａが設けられると共に、雄側端部２ｂ（他方の端部）に雄側係合部３ｂが設けられ、
雌側係合部３ａは、
雌側端部２ａに連続する板状部分であって、雌側端部２ａに対向するように折り返し、この折り返し部位から周方向の一方側に延びる第１板状片３１と、
第１板状片３１に連続する板状部分であって、第１板状片３１に対向するように第１板状片３１を挟んで雌側端部２ａとは反対側へ折り返し、この折り返し部位から周方向の他方側に延びる第２板状片３２と、
第１板状片３１と第２板状片３２との間の隙間により構成される溝４と、
溝４内に突出する雌側突起５とを有し、
雌側突起５は、第２板状片３２の一部分、または第２板状片３２に連続する板状片の一部分を、溝４内に突出する山形に変形させた形状であり、
雄側係合部３ｂは、
雄側端部２ｂに連続して周方向一方側に延びる板状部分であって溝４内に挿入される雄側係合片３０と、
雄側係合片３０が溝４内から抜き取られる方向で雌側突起５に係合可能に設けられた雄側突起６とを有し、
雄側突起６は、
雄側係合片３０に連続する板状部分であって、雄側係合片３０に対向するように折り返し、この折り返し部位から周方向他方側に延びる基端部６０と、
基端部６０に連続する板状部分であって、基端部６０に対し雄側係合片３０とは反対の側へ折れ曲がる突起部６１とを有する。
よって、雄側突起６の上記形状により、雄側突起６（雄側係合部３ｂ）と雌側突起５（雌側係合部３ａ）との係合を外れにくくすることができるため、カバー１による保護機能を向上することができる。
(3) An elbow cover 1 for covering a bent portion of a pipe or the like 7 (a pipe around which a heat insulating material is wound),
A pair of plate-like ends 2a and 2b which are opposed to each other in the circumferential direction surrounding the axis of the pipe and are engaged with each other;
A female-side engagement portion 3a is provided at the female-side end portion 2a (one end portion), and a male-side engagement portion 3b is provided at the male-side end portion 2b (the other end portion).
The female side engaging portion 3a is
A plate-like portion continuous to the female-side end 2a, folded back so as to face the female-side end 2a, and a first plate-like piece 31 extending from the turned-up portion to one side in the circumferential direction;
A plate-like portion that is continuous with the first plate-like piece 31 and is folded back to the side opposite to the female end 2a across the first plate-like piece 31 so as to face the first plate-like piece 31. A second plate-like piece 32 extending from the part to the other side in the circumferential direction;
A groove 4 constituted by a gap between the first plate-like piece 31 and the second plate-like piece 32;
A female projection 5 projecting into the groove 4;
The female projection 5 has a shape obtained by deforming a part of the second plate-like piece 32 or a part of the plate-like piece continuous to the second plate-like piece 32 into a mountain shape protruding into the groove 4.
The male side engaging portion 3b is
A male-side engagement piece 30 which is a plate-like portion extending continuously to one side in the circumferential direction continuously to the male-side end 2b and inserted into the groove 4;
A male-side protrusion 6 provided so as to be engageable with the female-side protrusion 5 in a direction in which the male-side engaging piece 30 is extracted from the groove 4;
The male projection 6 is
A plate-like portion continuous to the male engagement piece 30, folded back so as to face the male engagement piece 30, and a base end portion 60 extending from the folded portion to the other circumferential side;
A plate-like portion that is continuous with the base end portion 60 and has a protrusion 61 that bends to the side opposite to the male engagement piece 30 with respect to the base end portion 60.
Therefore, the male protrusion 6 (male engaging part 3b) and the female protrusion 5 (female engaging part 3a) can be made difficult to disengage due to the shape of the male protrusion 6, so that the cover 1 can be improved.
（４）雌側突起５は、第２板状片３２の面内に複数、周方向に並んで設けられている。
よって、上記（１）と同様の効果を得る。
(4) A plurality of female projections 5 are provided in the plane of the second plate-like piece 32 and arranged in the circumferential direction.
Therefore, the same effect as the above (1) is obtained.
（５）複数の雌側突起５は、第２板状片３２がその面内で局所的に切れ目500を付けられ、この切れ目500に隣接する部分が溝４内に持ち上げられた形状である。
よって、雌側突起５を容易に形成することができる。また、カバー１の外周面に切れ目500が露出することが抑制されるため、切れ目500を通ってカバー１の内側に水が浸入することを抑制することができる。
(5) The plurality of female-side protrusions 5 have a shape in which the second plate-like piece 32 is locally provided with a cut 500 in the plane, and a portion adjacent to the cut 500 is lifted into the groove 4.
Therefore, the female projection 5 can be easily formed. In addition, since the cut 500 is prevented from being exposed on the outer peripheral surface of the cover 1, it is possible to prevent water from entering the cover 1 through the cut 500.
（６）第１板状片３１、第２板状片３２、および雄側係合片３０を、カバー外側（配管等７の径方向外側）に向って凸の曲面状とした。
よって、雄側突起６（雄側係合部３ｂ）と雌側突起５（雌側係合部３ａ）との係合を外れにくくすることができるため、カバー１による保護機能を向上することができる。
(6) The 1st plate-shaped piece 31, the 2nd plate-shaped piece 32, and the male side engagement piece 30 were made into the curved surface shape convex toward the cover outer side (radial direction outer side of piping 7 etc.).
Therefore, the engagement between the male projection 6 (male engagement portion 3b) and the female projection 5 (female engagement portion 3a) can be made difficult to disengage, so that the protection function by the cover 1 can be improved. it can.
［実施例２］
図９は、実施例２のカバー１の係合した状態の両係合部３ａ，３ｂを開口部２２の側から見た、図８と同様の図である。実施例２のカバー１は、実施例１と同様、雌側係合部３ａを雌側端部２ａに対しカバー外側に配置している。実施例１と異なり、雌側突起５を、第２板状片３２ではなく第１板状片３１の面内に複数、周方向に並んで設けている。第１板状片３１の面内における複数の雌側突起５の配置は、実施例１の第２板状片３２の面内における複数の雌側突起５の配置と同様である。雄側突起６は、カバー外側へ折り返されることで形成されている。他の構成は実施例１と同様であるため、対応する構成について実施例１と同一の符号を付して説明を省略する。
[Example 2]
FIG. 9 is a view similar to FIG. 8, in which both the engaging portions 3 a and 3 b in the engaged state of the cover 1 according to the second embodiment are viewed from the opening 22 side. The cover 1 of Example 2 arrange | positions the female side engaging part 3a on the outer side of a cover with respect to the female side edge part 2a similarly to Example 1. FIG. Unlike the first embodiment, a plurality of female projections 5 are provided side by side in the circumferential direction in the surface of the first plate-like piece 31 instead of the second plate-like piece 32. The arrangement of the plurality of female projections 5 in the plane of the first plate-like piece 31 is the same as the arrangement of the plurality of female projections 5 in the plane of the second plate-like piece 32 of the first embodiment. The male projection 6 is formed by being folded back to the outside of the cover. Since other configurations are the same as those in the first embodiment, the corresponding configurations are denoted by the same reference numerals as those in the first embodiment and description thereof is omitted.
（雌側突起５を第１板状片３１に配置したことによる作用）
雌側突起５（のいずれか）に雄側突起６が係合しても、係合部位Rを介して第２板状片３２に力が入力されない。よって、その分だけ、溝４の幅を広げる力を抑制できるため、雌側係合部３ａと雄側係合部３ｂの係合が外れにくい。なお、本実施例のように複数の雌側突起５をポケット状に形成した場合、雌側突起５が設けられていない第２板状片３２にアールを付けることが容易となる。
(Operation by arranging the female projection 5 on the first plate-like piece 31)
Even if the male projection 6 is engaged with any one of the female projections 5, no force is input to the second plate-like piece 32 via the engagement portion R. Therefore, since the force which expands the width | variety of the groove | channel 4 by that much can be suppressed, engagement of the female side engaging part 3a and the male side engaging part 3b is hard to remove | deviate. In addition, when the some female side protrusion 5 is formed in a pocket shape like a present Example, it becomes easy to put a round on the 2nd plate-shaped piece 32 in which the female side protrusion 5 is not provided.
第１板状片３１の面内に局所的に切れ目500を付けることで雌側突起５を形成した場合、この切れ目500を通って外部からカバー１の内側に水が浸入するおそれがある。これに対し、実施例１と同様、雌側突起５（切れ目500）がカバー１の外側に露出することを抑制できる。具体的には、複数の雌側突起５は雌側端部２ａにより覆い隠され、カバー１の外側に露出しない。よって、両端部２ａ，２ｂの係合部位において、切れ目500からカバー１の内側に水が浸入することを抑制することができる。
When the female projection 5 is formed by locally making a cut 500 in the surface of the first plate-shaped piece 31, water may enter the inside of the cover 1 from the outside through the cut 500. On the other hand, as in the first embodiment, the female protrusion 5 (cut 500) can be prevented from being exposed to the outside of the cover 1. Specifically, the plurality of female-side protrusions 5 are covered and hidden by the female-side end portion 2 a and are not exposed to the outside of the cover 1. Therefore, it is possible to prevent water from entering the cover 1 from the cut 500 at the engagement portions of the both end portions 2a and 2b.
なお、溝４内に浸入した水が第１板状片３１の面内に形成された切れ目500を通ってカバー１の内側に浸入することも考えられる。しかし、実施例１と同様、溝４の幅が広がりにくく、また雄側係合片３０と第１板状片３１との密着度が高い。よって、溝４の開口部４１や雄側係合片３０と第１板状片３１との間の隙間を通った水の浸入が抑制されるため、上記のような切れ目500を通った水の浸入は抑制される。また、雌側係合部３ａの第１板状片３１、および第１板状片３１に対向する雌側端部２ａに、同様のアールを付けたことで、これらの密着度が高い。さらに、雄側突起６から第１板状片３１に入力される力に加えて、カバー外側に広がろうとする顎部２１の弾性力により、雌側端部２ａのカバー内側の面と、（雌側突起５が突出しない）第１板状片３１のカバー外側の面との間の隙間が縮められる。よって、仮に、溝４内に浸入した水が第１板状片３１の面内に形成された切れ目500を通って雌側端部２ａと第１板状片３１との間の上記隙間に入り込んでも、この隙間の開口側（第１板状片３１と第２板状片３２との接続部分の側）に漏れ出してカバー１の内側へ浸入することが抑制される。
It is also conceivable that water that has entered the groove 4 enters the inside of the cover 1 through a cut 500 formed in the surface of the first plate-like piece 31. However, as in the first embodiment, the width of the groove 4 is difficult to expand, and the degree of adhesion between the male side engaging piece 30 and the first plate-like piece 31 is high. Therefore, since the intrusion of water through the opening 41 of the groove 4 or the gap between the male engagement piece 30 and the first plate-like piece 31 is suppressed, the water passing through the cut 500 as described above is suppressed. Intrusion is suppressed. Moreover, since the same round is given to the 1st plate-shaped piece 31 of the female side engaging part 3a, and the female side end part 2a facing the 1st plate-shaped piece 31, these adhesion degrees are high. Furthermore, in addition to the force input to the first plate-like piece 31 from the male projection 6, the inner surface of the cover of the female end portion 2 a by the elastic force of the jaw portion 21 trying to spread outside the cover, The gap between the first plate-shaped piece 31 and the outer surface of the cover is reduced. Therefore, temporarily, water that has entered the groove 4 passes through the cut 500 formed in the surface of the first plate-like piece 31 and enters the gap between the female-side end portion 2a and the first plate-like piece 31. However, leakage to the opening side of the gap (the side of the connection portion between the first plate-like piece 31 and the second plate-like piece 32) and entry into the inside of the cover 1 are suppressed.
その他、実施例１と同様の構成により実施例１と同様の作用効果を得る。
In addition, the same effect as that of the first embodiment is obtained by the same configuration as that of the first embodiment.
［実施例３］
図１０は、実施例３のカバー１の係合した状態の両係合部３ａ，３ｂを開口部２２の側から見た、図８と同様の図である。実施例３のカバー１は、雌側係合部３ａを、雌側端部２ａに対しカバー外側に配置している。第１板状片３１は、雌側端部２ａに連続する板状部分が雌側端部２ａを挟んで配管等７とは反対側へ折り返されることで形成されている。第２板状片３２の幅方向寸法は第１板状片３１の幅方向寸法と略等しい。雌側突起５は、実施例２と同様、第１板状片３１の面内に複数、周方向に並んで設けられている。雄側突起６は、実施例１と同様、カバー内側へ折り返されることで形成されている。雄側突起６の突起部６１の幅方向寸法は基端部６０（雄側係合片３０の先端側）の幅方向寸法と略等しい。他の構成は実施例１と同様であるため、対応する構成について実施例１と同一の符号を付して説明を省略する。
[Example 3]
FIG. 10 is a view similar to FIG. 8, in which both the engaging portions 3 a and 3 b in the engaged state of the cover 1 according to the third embodiment are viewed from the opening 22 side. In the cover 1 of the third embodiment, the female side engaging portion 3a is disposed outside the cover with respect to the female side end portion 2a. The first plate-like piece 31 is formed by folding a plate-like portion continuous with the female-side end portion 2a toward the opposite side of the pipe 7 or the like across the female-side end portion 2a. The width direction dimension of the second plate-like piece 32 is substantially equal to the width direction dimension of the first plate-like piece 31. Similar to the second embodiment, a plurality of female-side protrusions 5 are provided side by side in the circumferential direction within the surface of the first plate-like piece 31. Similar to the first embodiment, the male projection 6 is formed by being folded back to the inside of the cover. The width-direction dimension of the protrusion 61 of the male-side protrusion 6 is substantially equal to the width-direction dimension of the base end portion 60 (the distal end side of the male-side engagement piece 30). Since other configurations are the same as those in the first embodiment, the corresponding configurations are denoted by the same reference numerals as those in the first embodiment and description thereof is omitted.
（雌側係合部３ａをカバー外側に配置したことによる作用）
雄側係合片３０、雌側係合部３ａ（第１板状片３１、第２板状片３２）、および第１板状片３１に対向する雌側端部２ａを、カバー外側に凸の曲面状とした（アールを付けた）。雌側係合部３ａを雌側端部２ａに沿った曲面形状とすることで、雌側係合部３ａがカバー１の外側に突出する（膨らむ）ことを抑制することができる。雄側係合部３ｂと第２板状片３２との密着度や、第１板状片３１と雌側端部２ａとの密着度を高めることで、これらの間の隙間内に外部から水が浸入したり溜まったりすることを抑制できる。
(Operation by disposing the female engagement portion 3a on the outside of the cover)
The male side engaging piece 30, the female side engaging part 3 a (first plate-like piece 31, second plate-like piece 32), and the female side end 2 a facing the first plate-like piece 31 are projected outward from the cover. It was made into a curved surface shape (with a rounded shape). By making the female side engaging part 3a into a curved surface shape along the female side end part 2a, it is possible to suppress the female side engaging part 3a from protruding (inflating) to the outside of the cover 1. By increasing the degree of adhesion between the male side engaging portion 3b and the second plate-like piece 32 and the degree of adhesion between the first plate-like piece 31 and the female-side end portion 2a, water is externally introduced into the gap between them. Can be prevented from entering and accumulating.
雌側係合部３ａをカバー１の外側に配置した場合でも、複数の雌側突起５は溝４内に突出し、カバー１の外側に突出することはない。よって、雌側突起５が人の手等に触れて傷付けるおそれはない。また、複数の雌側突起５を第１板状片３１に設けることで、これらを第２板状片３２により覆い隠すことが可能である。これにより、美観が悪化するおそれを回避することができる。
Even when the female side engaging portion 3 a is disposed outside the cover 1, the plurality of female side protrusions 5 protrude into the groove 4 and do not protrude outside the cover 1. Therefore, there is no possibility that the female-side protrusion 5 touches a human hand or the like and is damaged. Further, by providing the plurality of female side protrusions 5 on the first plate-like piece 31, it is possible to cover them with the second plate-like piece 32. Thereby, the possibility that aesthetics may deteriorate can be avoided.
雌側係合部３ａには、これに係合する雄側係合部３ｂを介して力が作用する。本実施例のように雌側係合部３ａをカバー１の外側に設けた場合、溝４の開口部４１における雌側端部２ａと第１板状片３１との接続部分近傍と雄側係合片３０との接触部位P'を支点とし、溝４内における雄側係合部３ｂの先端と第２板状片３２との接触部位Q'を作用点として、第２板状片３２を第１板状片３１から引き離して溝４の幅を広げる方向に、雄側係合部３ｂを介して第２板状片３２に力が作用する場合がある。ここで、実施例１と同様に、雌側係合部３ａの溝４に挿入される雄側係合部３ｂの長さを長くすることができる。よって、雄側係合部３ｂが雌側係合部３ａの溝４内に十分に支持されやすくなる。また、上記支点P'から上記作用点Q'までの距離L3が長くなり、溝４が広がりにくくなる。よって、係合が外れにくい。
A force acts on the female side engaging portion 3a via a male side engaging portion 3b engaged therewith. When the female engagement portion 3a is provided outside the cover 1 as in the present embodiment, the vicinity of the connection portion between the female end portion 2a and the first plate-like piece 31 at the opening 41 of the groove 4 and the male engagement. The contact point P ′ with the joint piece 30 is a fulcrum, and the contact point Q ′ between the tip of the male engagement portion 3b and the second plate-like piece 32 in the groove 4 is the action point, and the second plate-like piece 32 is A force may act on the second plate-like piece 32 via the male-side engaging portion 3b in a direction in which the groove 4 is widened away from the first plate-like piece 31. Here, the length of the male side engaging part 3b inserted in the groove | channel 4 of the female side engaging part 3a can be lengthened similarly to Example 1. FIG. Therefore, it becomes easy to fully support the male side engaging part 3b in the groove | channel 4 of the female side engaging part 3a. Further, the distance L3 from the fulcrum P ′ to the action point Q ′ is increased, and the groove 4 is difficult to expand. Therefore, it is difficult to disengage.
雌側係合部３ａをカバー１の外側に配置したため、雄側係合部３ｂと係合する雌側係合部３ａがカバー内側の配管等７と干渉するおそれはない。よって、カバー本体２（顎部２１等）を配管等７の外周面に接近させて密着度を高め、カバー１による保護機能を向上することができる。言換えると、第２板状片３２や雄側突起６の突起部６１の幅方向寸法を第１板状片３１の幅方向寸法より小さくしなくても、上記干渉を回避しつつ、カバー１の密着度を向上することができる。よって、雌側係合部３ａをカバー１の内側に配置した場合に比べ、第２板状片３２において雌側突起５が幅方向で占める範囲や、雄側突起６の突起部６１が幅方向に延びる範囲を大きくすることができるため、係合の強度を向上することが可能である。
Since the female side engaging portion 3a is disposed outside the cover 1, there is no possibility that the female side engaging portion 3a that engages with the male side engaging portion 3b interferes with the piping 7 inside the cover. Therefore, the cover main body 2 (jaw part 21 etc.) can be brought close to the outer peripheral surface of the pipe etc. 7 to increase the degree of adhesion, and the protection function by the cover 1 can be improved. In other words, even if the width direction dimensions of the second plate-like piece 32 and the protrusion 61 of the male projection 6 are not smaller than the width-direction dimension of the first plate-like piece 31, the cover 1 is avoided while avoiding the interference. The degree of adhesion can be improved. Therefore, compared with the case where the female side engaging part 3a is arranged inside the cover 1, the range in which the female side protrusion 5 occupies in the width direction in the second plate-like piece 32 or the protrusion part 61 of the male side protrusion 6 is in the width direction. Since the range extending in the direction can be increased, the strength of engagement can be improved.
カバー外側へ広がろうとする顎部２１の弾性力により雄側係合部３ｂを介して雌側係合部３ａに作用する力は、雌側端部２ａと第１板状片３１との接続部分近傍の部位P'（溝４の開口部４１）を支点として第２板状片３２の中間側の部位Q'を作用点とする。雌側係合部３ａをカバー１の内側に配置した場合に比べ、雄側係合部３ｂから雌側係合部３ａに作用する力の作用部位Q'が溝４の内部（第２板状片３２の面内）すなわち第２板状片３２の中間側となり、第１板状片３１と第２板状片３２との接続部分Oから力の作用部位Q'までの距離L2が短くなる。よって、溝４が広がりにくいため、係合が外れにくい。
The force acting on the female side engaging part 3a via the male side engaging part 3b by the elastic force of the jaw part 21 that is going to spread outside the cover is the connection between the female side end part 2a and the first plate-like piece 31. A site P ′ (opening 41 of the groove 4) in the vicinity of the portion is used as a fulcrum, and a site Q ′ on the intermediate side of the second plate-shaped piece 32 is used as an action point. Compared with the case where the female side engaging part 3a is arranged inside the cover 1, the action site Q ′ of the force acting on the female side engaging part 3a from the male side engaging part 3b is located inside the groove 4 (second plate shape). The distance L2 from the connection portion O between the first plate-like piece 31 and the second plate-like piece 32 to the force application site Q ′ becomes shorter. . Therefore, since the groove 4 is difficult to expand, it is difficult to disengage.
溝４の底部４０は閉じられており、穴等が設けられていない。よって、外部から溝４の底部４０を通って溝４内へ水が浸入し、カバー１の内周側へ至ることは抑制される。また、雌側端部２ａと第１板状片３１との接続部分は閉じられており、穴等が設けられていない。よって、雌側端部２ａと第１板状片３１との間の隙間へ水が浸入したとしても、この水が上記接続部分を通ってカバー１の内周側へ至ることは抑制される。よって、カバー１による保護機能を向上することができる。
The bottom 40 of the groove 4 is closed, and no hole or the like is provided. Therefore, water can be prevented from entering the groove 4 from the outside through the bottom 40 of the groove 4 and reaching the inner peripheral side of the cover 1. Moreover, the connection part of the female side edge part 2a and the 1st plate-shaped piece 31 is closed, and the hole etc. are not provided. Therefore, even if water enters the gap between the female end portion 2a and the first plate-like piece 31, the water is prevented from passing through the connecting portion to the inner peripheral side of the cover 1. Therefore, the protection function by the cover 1 can be improved.
（雌側突起５を第１板状片３１に配置したことによる作用）
雌側突起５を第１板状片３１に配置したことにより、実施例２と同様の作用効果を得る。第１板状片３１の面内に局所的に切れ目500を付けることで雌側突起５を形成した場合、この切れ目500がカバー１の外側に露出していると、この切れ目500を通って外部からカバー１の内側に水が浸入するおそれがある。これに対し、上記のように、複数の雌側突起５（切れ目500）は第２板状片３２により覆い隠され、カバー１の外側に露出しない。また、雌側係合部３ａの第１板状片３１、および第１板状片３１に対向する雌側端部２ａに、同様のアールを付けたことで、これらの密着度が高い。よって、これらの間の隙間に水が浸入することを抑制することができる。したがって、第１板状片３１の面内に形成された切れ目500から溝４内に水が浸入することを抑制することができる。これにより、カバー１の内側に水が浸入することを抑制することができる。また、実施例１と同様、溝４の幅が広がりにくく、また、雄側係合部３ｂと第１板状片３１および第２板状片３２との密着度が高い。よって、溝４の開口部４１から溝４内へ水が浸入したり、溝４内へ浸入した水が第１板状片３１と雄側係合部３ｂとの間の隙間を通ってカバー１の内側に浸入したりすることが抑制される。
(Operation by arranging the female projection 5 on the first plate-like piece 31)
By arranging the female side protrusion 5 on the first plate-like piece 31, the same effect as that of the second embodiment is obtained. When the female projection 5 is formed by locally making a cut 500 in the surface of the first plate-shaped piece 31, if the cut 500 is exposed to the outside of the cover 1, it passes through the cut 500 to the outside. There is a risk that water may enter the cover 1 from the inside. On the other hand, as described above, the plurality of female projections 5 (cuts 500) are covered with the second plate-like piece 32 and are not exposed to the outside of the cover 1. Moreover, since the same round is given to the 1st plate-shaped piece 31 of the female side engaging part 3a, and the female side end part 2a facing the 1st plate-shaped piece 31, these adhesion degrees are high. Therefore, it can suppress that water permeates into the gap between them. Therefore, water can be prevented from entering the groove 4 from the cut 500 formed in the surface of the first plate-like piece 31. Thereby, water can be prevented from entering the inside of the cover 1. Further, as in the first embodiment, the width of the groove 4 is difficult to expand, and the degree of adhesion between the male side engaging portion 3b and the first plate-like piece 31 and the second plate-like piece 32 is high. Therefore, water enters the groove 4 from the opening 41 of the groove 4, or the water that has entered the groove 4 passes through the gap between the first plate-like piece 31 and the male engagement portion 3 b. It is suppressed that it penetrates into the inside.
また、第１板状片３１と第２板状片３２が雄側係合部３ｂを挟み込む弾性力に加えて、カバー外側に広がろうとする顎部２１の弾性力により、溝４内の部位Q'において、雄側係合部３ｂ（周方向先端部分）のカバー外側の面と、（溝４内に面する）第１板状片３１のカバー内側の面とが接触する。また、雄側係合部３ｂのカバー内側の面が、雌側端部２ａと第１板状片３１との接続部分近傍の部位P'に接触し、押付けられる。上記各弾性力により、上記各接触が強化され、これらの接触部位P', Q'で各部分が密着してシール性が担保される。よって、溝４の開口部４１から浸入した水が上記各接触部位P', Q'における隙間を通ってカバー１の内側へ浸入することが抑制される。
Further, in addition to the elastic force with which the first plate-like piece 31 and the second plate-like piece 32 sandwich the male-side engaging portion 3b, the portion in the groove 4 is caused by the elastic force of the jaw portion 21 that is about to spread outside the cover. In Q ′, the outer surface of the cover of the male engaging portion 3b (circumferential tip) contacts the inner surface of the cover of the first plate-shaped piece 31 (facing in the groove 4). Further, the inner surface of the cover of the male side engaging portion 3b comes into contact with and pressed against a portion P ′ in the vicinity of the connecting portion between the female side end portion 2a and the first plate-like piece 31. The respective contacts are strengthened by the respective elastic forces, and the respective portions are brought into close contact with each other at the contact portions P ′ and Q ′ to ensure the sealing performance. Therefore, the water that has entered from the opening 41 of the groove 4 is prevented from entering the inside of the cover 1 through the gaps at the contact portions P ′ and Q ′.
その他、実施例１と同様の構成により実施例１と同様の作用効果を得る。
In addition, the same effect as that of the first embodiment is obtained by the same configuration as that of the first embodiment.
［実施例４］
図１１は、実施例４のカバー１の係合した状態の両係合部３ａ，３ｂを開口部２２の側から見た、図８と同様の図である。実施例４のカバー１は、実施例３と同様、雌側係合部３ａを雌側端部２ａに対しカバー外側に配置している。雌側突起５は、実施例１と同様、第２板状片３２の面内に複数、周方向に並んで設けられている。雄側突起６は、実施例２と同様、カバー外側へ折り返されることで形成されている。他の構成は実施例１，３と同様であるため、対応する構成について実施例１，３と同一の符号を付して説明を省略する。
[Example 4]
FIG. 11 is a view similar to FIG. 8, in which both engaging portions 3 a and 3 b in a state in which the cover 1 of the fourth embodiment is engaged are viewed from the opening 22 side. In the cover 1 of the fourth embodiment, as in the third embodiment, the female side engaging portion 3a is disposed on the outer side of the cover with respect to the female side end portion 2a. Similar to the first embodiment, a plurality of female side protrusions 5 are provided in the circumferential direction in the surface of the second plate-like piece 32. Similar to the second embodiment, the male projection 6 is formed by being folded back to the outside of the cover. Since other configurations are the same as those of the first and third embodiments, the corresponding configurations are denoted by the same reference numerals as those of the first and third embodiments, and description thereof is omitted.
雌側係合部３ａをカバー外側に配置したことにより、実施例３と同様の作用効果を得る。
By arranging the female side engaging portion 3a on the outer side of the cover, the same effect as that of the third embodiment is obtained.
（雌側突起５を第２板状片３２に配置したことによる作用）
雌側突起５を第２板状片３２に配置したことにより、実施例１と同様の作用効果を得る。第２板状片３２の面内に局所的に切れ目500を付けることで雌側突起５を形成した場合、この切れ目500がカバー１の外側に露出するため、この切れ目500を通って外部からカバー１の内側に水が浸入することも考えられる。しかし、実施例１と同様、溝４の幅（第１板状片３１や第２板状片３２と雄側係合部３ｂとの間の隙間）が広がりにくい。また、第１板状片３１と第２板状片３２が雄側係合部３ｂを挟み込む弾性力に加えて、カバー外側に広がろうとする顎部２１の弾性力により、雄側係合片３０のカバー内側の面が、雌側端部２ａと第１板状片３１との接続部分近傍の部位P'に対して押付けられる。よって、仮に、第２板状片３２の面内に形成された切れ目500を通って水が溝４内に浸入しても、第１板状片３１と雄側係合部３ｂとの間の隙間を通り、溝４の開口側（雌側端部２ａと第１板状片３１との接続部分の側）からカバー１の内側へ浸入することが抑制される。なお、複数の雌側突起５を第１板状片３１に設けた場合と異なり、雄側係合部３ｂのカバー内側の面と、雌側端部２ａと第１板状片３１との接続部分近傍の部位P'との接触が、雌側突起５によって妨げられるおそれがないため、上記接触部位P'での両者の密着度を向上できる。よって、より確実に水の浸入を抑制することができる。
(Operation by arranging the female projection 5 on the second plate-like piece 32)
By arranging the female side protrusion 5 on the second plate-like piece 32, the same effect as that of the first embodiment is obtained. When the female projection 5 is formed by locally making a cut 500 in the surface of the second plate-like piece 32, the cut 500 is exposed to the outside of the cover 1, so that the cover is applied from the outside through the cut 500. It is also conceivable for water to enter the inside of 1. However, as in the first embodiment, the width of the groove 4 (the gap between the first plate-like piece 31 and the second plate-like piece 32 and the male engagement portion 3b) is difficult to spread. Further, in addition to the elastic force between the first plate-like piece 31 and the second plate-like piece 32 sandwiching the male-side engaging portion 3b, the male-side engaging piece is caused by the elastic force of the jaw portion 21 that is about to spread outside the cover. The inner surface of the cover 30 is pressed against a portion P ′ in the vicinity of the connection portion between the female end 2a and the first plate-like piece 31. Therefore, even if water enters the groove 4 through the cut 500 formed in the surface of the second plate-like piece 32, it is between the first plate-like piece 31 and the male side engaging portion 3b. Intrusion into the inside of the cover 1 from the opening side of the groove 4 (the side of the connecting portion between the female side end 2a and the first plate-like piece 31) through the gap is suppressed. Unlike the case where a plurality of female projections 5 are provided on the first plate-like piece 31, the inner surface of the male engagement portion 3 b and the connection between the female end 2 a and the first plate-like piece 31 are provided. Since contact with the part P ′ in the vicinity of the part is not likely to be hindered by the female projection 5, the degree of adhesion between the two at the contact part P ′ can be improved. Therefore, it is possible to more reliably suppress the entry of water.
その他、実施例１と同様の構成により実施例１と同様の作用効果を得る。
In addition, the same effect as that of the first embodiment is obtained by the same configuration as that of the first embodiment.
［実施例５］
まず、構成を説明する。図１２は、実施例５のカバー１の係合した状態の両係合部３ａ，３ｂを開口部２２の側から見た、図８と同様の図である。実施例５のカバー１は、係合位置調節用の複数の突起を雌側係合部３ａではなく雄側係合部３ｂに設けている（複数の雄側突起６）。雌側突起５は、第２板状片３２の先端部分が折り返されることで１つ形成されている。実施例１と同様、雌側係合部３ａを、雌側端部２ａに対しカバー内側に配置している。
[Example 5]
First, the configuration will be described. FIG. 12 is a view similar to FIG. 8, in which both engaging portions 3 a and 3 b in a state in which the cover 1 of the fifth embodiment is engaged are viewed from the opening 22 side. In the cover 1 of the fifth embodiment, a plurality of protrusions for adjusting the engagement position are provided not on the female side engaging part 3a but on the male side engaging part 3b (a plurality of male side protrusions 6). One female projection 5 is formed by folding the tip of the second plate-like piece 32. Similar to the first embodiment, the female side engaging portion 3a is disposed inside the cover with respect to the female side end portion 2a.
雌側突起５は、実施例１の雄側突起６と同様の形状であり、基端部５０と突起部５１を有している。基端部５０は、第２板状片３２に連続して第２板状片３２から周方向に延長された板状部分が第２板状片３２に対向するように溝４内に折り返されることで形成されており、折り返された部位から周方向一方側に延びる。基端部５０は、第２板状片３２の周方向他方側の幅方向全範囲にわたって設けられている。突起部５１は、基端部５０に連続して基端部５０から周方向に延長された板状部分が、基端部５０に対し第２板状片３２とは反対側へ折り曲げられることで形成されており、折り曲げられた部位から周方向一方側に第２板状片３２から遠ざかるように延びる。突起部５１は、幅方向で基端部５０（第２板状片３２の周方向先端側）の全範囲にわたって設けられている。
The female-side protrusion 5 has the same shape as the male-side protrusion 6 of Example 1, and has a base end portion 50 and a protrusion portion 51. The base end portion 50 is folded back into the groove 4 so that a plate-like portion extending in the circumferential direction from the second plate-like piece 32 and continuing to the second plate-like piece 32 faces the second plate-like piece 32. It is formed by this and extends from the folded part to one side in the circumferential direction. The base end portion 50 is provided over the entire range in the width direction on the other circumferential side of the second plate-like piece 32. The protrusion 51 is formed by bending a plate-like portion extending from the base end 50 in the circumferential direction continuously to the base end 50 to the side opposite to the second plate-like piece 32 with respect to the base end 50. It is formed and extends away from the second plate-like piece 32 in the circumferential direction one side from the bent portion. The protruding portion 51 is provided over the entire range of the base end portion 50 (the distal end side in the circumferential direction of the second plate-like piece 32) in the width direction.
雄側突起６は、実施例１の雌側突起５と同様の形状であり、周方向他方側に面する当接面602と、当接面602から周方向一方側へ延びて雄側係合片３０の面に連続する後背部601とを備えている。雄側突起６は、雄側係合片３０の一部分を、幅方向における両端が雄側係合片３０の面に連続すると共に雄側係合片３０の面に直交する方向に突出する山形に変形させることで、形成されている。雄側突起６は、雄側係合片３０の面内に複数、周方向に並んで設けられている。複数の雄側突起６は、実施例１の雌側突起５と同様、千鳥状に配置されている。複数の雄側突起６は、第２板状片３２（雌側突起５）が占める幅方向範囲と略等しい幅方向範囲内に配置されている。他の構成は実施例１と同様であるため、対応する構成について実施例１と同一の符号を付して説明を省略する。
The male-side protrusion 6 has the same shape as the female-side protrusion 5 of Example 1, and has a contact surface 602 facing the other circumferential side and a male-side engagement extending from the contact surface 602 to the one circumferential direction. A back portion 601 continuous with the surface of the piece 30 is provided. The male-side protrusion 6 has a part of the male-side engagement piece 30 in a mountain shape whose both ends in the width direction are continuous with the surface of the male-side engagement piece 30 and project in a direction perpendicular to the surface of the male-side engagement piece 30. It is formed by deforming. A plurality of male projections 6 are provided in the circumferential direction in the surface of the male engagement piece 30. The plurality of male projections 6 are arranged in a staggered manner, like the female projection 5 of the first embodiment. The plurality of male projections 6 are arranged in a width direction range substantially equal to the width direction range occupied by the second plate-like piece 32 (female side projection 5). Since other configurations are the same as those in the first embodiment, the corresponding configurations are denoted by the same reference numerals as those in the first embodiment and description thereof is omitted.
次に、作用を説明する。雄側係合片３０の先端部分が雄側係合片３０の本体に対向するように折り返されている。よって、実施例１雄側突起６と同様、雄側係合部３ｂの周方向先端側の強度を向上できる。また、雄側係合部３ｂの周方向先端側が人の手等を傷つけるおそれを低減できる。また、雌側係合部３ａの溝４内への雄側係合部３ｂの挿入を容易にし、カバー１の取付け作業性を向上することができる。
Next, the operation will be described. The distal end portion of the male engagement piece 30 is folded back so as to face the main body of the male engagement piece 30. Therefore, as in the first embodiment, the strength on the distal end side in the circumferential direction of the male engagement portion 3b can be improved. Moreover, the possibility that the distal end side in the circumferential direction of the male engagement portion 3b may injure human hands or the like can be reduced. Moreover, the male side engaging part 3b can be easily inserted into the groove 4 of the female side engaging part 3a, and the mounting workability of the cover 1 can be improved.
（雌側突起５の形状や配置による作用）
第２板状片３２の先端側に雌側突起５が設けられているため、第１板状片３１や第２板状片３２の長さとして、複数の雄側突起６を係合させるために必要な長さ以外の分を削減可能である。よって、材料を余分に必要とせずにコストを抑制できると共に、雌側係合部３ａを小型化することができる。
(Operation by shape and arrangement of female projection 5)
Since the female projection 5 is provided on the distal end side of the second plate-like piece 32, the lengths of the first plate-like piece 31 and the second plate-like piece 32 are used to engage a plurality of male-side projections 6. It is possible to reduce the amount other than the length required for. Therefore, the cost can be suppressed without requiring extra material, and the female side engaging portion 3a can be downsized.
第２板状片３２の周方向先端部分が折り返されることで雌側突起５が形成されている。よって、実施例１の第３板状片３３と同様、第２板状片３２の周方向先端側の強度を向上できる。また、第２板状片３２の周方向先端側が人の手等を傷つけるおそれを低減できる。また、雌側係合部３ａの溝４内への雄側係合部３ｂの挿入を容易にし、カバー１の取付け作業性を向上することができる。
The female-side protrusion 5 is formed by folding back the circumferential tip portion of the second plate-like piece 32. Therefore, similarly to the third plate-like piece 33 of the first embodiment, the strength of the second plate-like piece 32 on the distal end side in the circumferential direction can be improved. Moreover, the possibility that the distal end side in the circumferential direction of the second plate-like piece 32 may hurt human hands or the like can be reduced. Moreover, the male side engaging part 3b can be easily inserted into the groove 4 of the female side engaging part 3a, and the mounting workability of the cover 1 can be improved.
雄側突起６は、雄側係合片３０の一部分を山形に変形させることで、形成されている。よって、実施例１の雌側突起５と同様、雄側突起６の高さ（雄側係合片３０の面に直交する方向に突出する当接面602の中間部の高さ）を一定以上高くすることが困難である。よって、溝４内において雌側突起５（の先端）を雄側突起６（の当接面602）に十分に近づけることが困難となり、両突起５，６の係合が外れやすくなるおそれがある。これに対し、雌側突起５の突起部５１は、第２板状片３２とは反対の側に（すなわち第２板状片３２から遠ざかるように）基端部５０に対し折れ曲がっている。これにより、雄側係合部３ｂが溝４内に挿入された状態で、突起部５１は、第２板状片３２に対向する雄側係合片３０へ向って延びることとなる。よって、雌側突起５の突起部５１の先端を、雄側係合片３０に対して突出する雄側突起６の当接面602に近づけることができる。したがって、より確実に雄側突起６を雌側突起５に係合させることができるため、係合が外れにくい。
The male projection 6 is formed by deforming a part of the male engagement piece 30 into a mountain shape. Therefore, like the female projection 5 of the first embodiment, the height of the male projection 6 (the height of the intermediate portion of the contact surface 602 protruding in the direction orthogonal to the surface of the male engagement piece 30) is a certain level or more. It is difficult to make it high. Therefore, it is difficult to bring the female-side protrusion 5 (the tip) into the groove 4 sufficiently close to the male-side protrusion 6 (the contact surface 602), and the engagement between the protrusions 5 and 6 may be easily released. . On the other hand, the protrusion 51 of the female protrusion 5 is bent with respect to the base end portion 50 on the side opposite to the second plate-like piece 32 (that is, away from the second plate-like piece 32). As a result, the protrusion 51 extends toward the male engagement piece 30 facing the second plate-like piece 32 in a state where the male engagement portion 3 b is inserted into the groove 4. Therefore, the tip of the protrusion 51 of the female protrusion 5 can be brought close to the contact surface 602 of the male protrusion 6 that protrudes with respect to the male engagement piece 30. Therefore, since the male projection 6 can be more reliably engaged with the female projection 5, it is difficult to disengage.
なお、雄側突起６は、周方向または幅方向で複数設けられていなくてもよい。雄側突起６（当接面602）は、雄側係合片３０の面内に局所的に切れ目を付けて切り起こすことにより形成したものに限らず、例えば、雄側係合部３ｂの先端部を周方向から見たとき幅方向で蛇行する波形に加工し、この先端部を雄側係合片３０に対向するよう折り返すことで幅方向に複数並んで形成したものでもよい。すなわち、雄側係合片３０に連続する板状片の一部分を山形に変形させることで、雄側突起６を形成することとしてもよい。また、当接面602は幅方向に対し所定の角度を有していてもよい。また、カバー１は、配管の直線部を覆うためのラッキングカバーであってもよい。
In addition, the male side protrusion 6 does not need to be provided with two or more by the circumferential direction or the width direction. The male-side protrusion 6 (contact surface 602) is not limited to the one formed by locally cutting and raising the surface of the male-side engagement piece 30, for example, the tip of the male-side engagement portion 3b. The portion may be formed into a waveform that meanders in the width direction when viewed from the circumferential direction, and the tip portion is folded back so as to face the male engagement piece 30 so as to be aligned in the width direction. That is, the male protrusion 6 may be formed by deforming a part of the plate-shaped piece continuous to the male engagement piece 30 into a mountain shape. Further, the contact surface 602 may have a predetermined angle with respect to the width direction. Moreover, the cover 1 may be a racking cover for covering the straight portion of the pipe.
雄側突起６は、雄側係合片３０の面内に複数、周方向に並んで設けられている。雌側突起５の突起部５１は、基端部５０に対し第２板状片３２とは反対側へ折れ曲がっており、この折れ曲がり部位から周方向一方側に延びる。よって、実施例１と同様、ある雄側突起６に雌側突起５が係合する際、この雄側突起６に周方向他方側で隣接する雄側突起６と雌側突起５とが干渉することが抑制される。よって、雌側突起５の突起部５１の先端は、雄側突起６の当接面602の根元側に当接することができるため、係合が外れにくい。なお、より深い位置での係合を実現するために、雄側係合片３０の面（雌側突起５が係合する雄側突起６における雄側係合片３０の接平面）に対する雌側突起５の突起部５１の角度α'を、雄側係合片３０の面に対する雄側突起６の後背部501の（望ましくは最大の）角度β'よりも大きく設定することが好ましい。また、雄側係合片３０の面に対する雄側突起６の高さh1'よりも、第２板状片３２の（周方向先端側の）面に直交する方向における基端部５０に対する突起部５１の高さh2'のほうを大きく設定することが好ましい。
A plurality of male projections 6 are provided in the circumferential direction in the surface of the male engagement piece 30. The protrusion 51 of the female protrusion 5 is bent to the side opposite to the second plate-like piece 32 with respect to the base end portion 50, and extends from the bent portion to one side in the circumferential direction. Therefore, as in the first embodiment, when the female projection 5 is engaged with a certain male projection 6, the male projection 6 and the female projection 5 adjacent to the male projection 6 on the other circumferential side interfere with each other. It is suppressed. Therefore, the tip of the projection 51 of the female projection 5 can be brought into contact with the base side of the contact surface 602 of the male projection 6, so that the engagement is not easily released. In order to realize engagement at a deeper position, the female side with respect to the surface of the male side engaging piece 30 (the tangent plane of the male side engaging piece 30 in the male side protrusion 6 with which the female side protrusion 5 engages). The angle α ′ of the protrusion 51 of the protrusion 5 is preferably set to be larger than the (desirably maximum) angle β ′ of the back portion 501 of the male protrusion 6 with respect to the surface of the male engagement piece 30. Further, the protrusion with respect to the base end portion 50 in the direction orthogonal to the surface (on the distal end side in the circumferential direction) of the second plate-shaped piece 32 than the height h1 ′ of the male protrusion 6 with respect to the surface of the male engagement piece 30 It is preferable to set the height h2 ′ of 51 larger.
基端部５０は、第２板状片３２に対する折り返し部位から第２板状片３２に近づくように周方向一方側に延びる。これにより、第２板状片３２に対する、基端部５０と突起部５１とを含めた雌側突起５全体としての高さh3' が増大することを抑制できる。よって、雄側係合部３ｂと雌側係合部３ａが係合した状態での溝４（開口部４１）の幅を狭くし、雌側係合部３ａ（第２板状片３２）がカバー１の内側に突出する（膨らむ）ことを抑制することができる。また、雌側突起５の全体としての高さh3'はそのままで、突起部５１を長くできるため、上記効果を向上できる。
The base end portion 50 extends to one side in the circumferential direction so as to approach the second plate-like piece 32 from the folded portion with respect to the second plate-like piece 32. Thereby, it is possible to suppress an increase in the height h3 ′ of the female projection 5 including the proximal end portion 50 and the projection 51 with respect to the second plate-like piece 32. Therefore, the width of the groove 4 (opening 41) in a state in which the male side engaging portion 3b and the female side engaging portion 3a are engaged is reduced, and the female side engaging portion 3a (second plate-like piece 32) is reduced. Protruding (inflating) to the inside of the cover 1 can be suppressed. In addition, the height h3 ′ of the female projection 5 as a whole can be kept as it is, and the projection 51 can be lengthened. Therefore, the above effect can be improved.
その他、実施例１と同様の構成により実施例１と同様の作用効果を得る。以下、本実施例のカバー１が奏する効果を記す。
In addition, the same effect as that of the first embodiment is obtained by the same configuration as that of the first embodiment. Hereinafter, the effect which the cover 1 of a present Example show | plays is described.
（７）配管等７（断熱材が巻き付けられた配管）の屈曲部を覆うためのエルボ用カバー１であって、
配管の軸を取り囲む周方向で対向し互いに係合される一対の板状の端部２ａ，２ｂを備え、
雌側端部２ａ（一方の端部）に雌側係合部３ａが設けられると共に、雄側端部２ｂ（他方の端部）に雄側係合部３ｂが設けられ、
雌側係合部３ａは、
雌側端部２ａに連続する板状部分であって、雌側端部２ａに対向するように折り返し、この折り返し部位から周方向の一方側に延びる第１板状片３１と、
第１板状片３１に連続する板状部分であって、第１板状片３１に対向するように第１板状片３１を挟んで雌側端部２ａとは反対側へ折り返し、この折り返し部位から周方向の他方側に延びる第２板状片３２と、
第１板状片３１と第２板状片３２との間の隙間により構成される溝４と、
溝４内に突出する雌側突起５とを有し、
雌側突起５は、
第２板状片３２に連続する板状部分であって、第２板状片３２に対向するように溝４内に折り返し、この折り返し部位から周方向一方側に延びる基端部６０と、
基端部６０に連続する板状部分であって、基端部６０に対し第２板状片３２とは反対の側へ折れ曲がる突起部６１とを有し、
雄側係合部３ｂは、
雄側端部２ｂに連続して周方向一方側に延びる板状部分であって溝４内に挿入される雄側係合片３０と、
雄側係合片３０が溝４内から抜き取られる方向で雌側突起５に係合可能に設けられた雄側突起６とを有し、
雄側突起６は、雄側係合片３０の一部分、または雄側係合片３０に連続する板状片の一部分を、雄側係合片３０の面に直交する方向に突出する山形に変形させた形状である。
よって、雌側突起５の上記形状により、雄側突起６（雄側係合部３ｂ）と雌側突起５（雌側係合部３ａ）との係合を外れにくくすることができるため、カバー１による保護機能を向上することができる。
(7) An elbow cover 1 for covering a bent portion of a pipe 7 or the like (a pipe around which a heat insulating material is wound),
A pair of plate-like ends 2a and 2b which are opposed to each other in the circumferential direction surrounding the axis of the pipe and are engaged with each other;
A female-side engagement portion 3a is provided at the female-side end portion 2a (one end portion), and a male-side engagement portion 3b is provided at the male-side end portion 2b (the other end portion).
The female side engaging portion 3a is
A plate-like portion continuous to the female-side end 2a, folded back so as to face the female-side end 2a, and a first plate-like piece 31 extending from the turned-up portion to one side in the circumferential direction;
A plate-like portion that is continuous with the first plate-like piece 31 and is folded back to the side opposite to the female end 2a across the first plate-like piece 31 so as to face the first plate-like piece 31. A second plate-like piece 32 extending from the part to the other side in the circumferential direction;
A groove 4 constituted by a gap between the first plate-like piece 31 and the second plate-like piece 32;
A female projection 5 projecting into the groove 4;
The female projection 5 is
A plate-like portion continuous to the second plate-like piece 32, folded back into the groove 4 so as to face the second plate-like piece 32, and a base end portion 60 extending from the folded portion to one side in the circumferential direction;
A plate-like portion that is continuous with the base end portion 60, and has a protrusion 61 that bends to the side opposite to the second plate-like piece 32 with respect to the base end portion 60;
The male side engaging portion 3b is
A male-side engagement piece 30 which is a plate-like portion extending continuously to one side in the circumferential direction continuously to the male-side end 2b and inserted into the groove 4;
A male-side protrusion 6 provided so as to be engageable with the female-side protrusion 5 in a direction in which the male-side engaging piece 30 is extracted from the groove 4;
The male protrusion 6 deforms a part of the male engagement piece 30 or a part of the plate-like piece continuous to the male engagement piece 30 into a mountain shape protruding in a direction perpendicular to the surface of the male engagement piece 30. Shape.
Therefore, the shape of the female projection 5 can make it difficult to disengage the male projection 6 (male engagement portion 3b) and the female projection 5 (female engagement portion 3a). 1 can be improved.
［実施例６］
図１３は、実施例６のカバー１の係合した状態の両係合部３ａ，３ｂを開口部２２の側から見た、図８と同様の図である。実施例６のカバー１は、実施例５と同様、複数の突起を雄側係合部３ｂに設けると共に、第２板状片３２の先端部分を折り返すことで雌側突起５を形成している。実施例３と同様、雌側係合部３ａを雌側端部２ａに対しカバー外側に配置している。他の構成は実施例１と同様であるため、対応する構成について実施例１と同一の符号を付して説明を省略する。
[Example 6]
FIG. 13 is a view similar to FIG. 8, in which both the engaging portions 3 a and 3 b in the engaged state of the cover 1 according to the sixth embodiment are viewed from the opening 22 side. As in the fifth embodiment, the cover 1 according to the sixth embodiment is provided with a plurality of protrusions on the male engagement portion 3b and the female protrusion 5 is formed by folding back the tip of the second plate-like piece 32. . Similar to the third embodiment, the female side engaging portion 3a is disposed outside the cover with respect to the female side end portion 2a. Since other configurations are the same as those in the first embodiment, the corresponding configurations are denoted by the same reference numerals as those in the first embodiment and description thereof is omitted.
雌側係合部３ａをカバー外側に配置したことにより、実施例３と同様の作用効果を得る。また、複数の突起を雄側係合部３ｂに設けると共に、第２板状片３２の先端部分を折り返すことにより雌側突起５を形成することで、実施例５と同様の作用効果を得る。
By arranging the female side engaging portion 3a on the outer side of the cover, the same effect as that of the third embodiment is obtained. Further, by providing a plurality of protrusions on the male side engaging portion 3b and forming the female side protrusion 5 by folding back the tip portion of the second plate-like piece 32, the same effects as those of the fifth embodiment are obtained.
雌側係合部３ａをカバー１の外側に配置すると共に、雌側突起５を第２板状片３２の周方向先端側に設けた場合には、カバー外側に広がろうとする顎部２１の弾性力により、溝４の開口部４１において、雄側係合片３０（雄側突起６）が第２板状片３２の周方向先端部分（雌側突起５）から離間しやすくなる。よって、雌側突起５（の先端）を雄側突起６（の当接面602）に十分に近づけることが困難となり、両突起５，６の係合が外れやすくなるおそれが高い。よって、雌側突起５の突起部５１が第２板状片３２とは反対の側に（すなわち第２板状片３２から遠ざかるように）基端部５０に対し折れ曲がった形状とすることで、より確実に雄側突起６を雌側突起５に係合させることができるという上記作用効果を、より効果的に得ることができる。
When the female side engaging portion 3a is disposed outside the cover 1 and the female side protrusion 5 is provided on the distal end side in the circumferential direction of the second plate-like piece 32, the jaw portion 21 that is about to spread outside the cover is provided. Due to the elastic force, in the opening 41 of the groove 4, the male side engagement piece 30 (male side protrusion 6) can be easily separated from the circumferential tip portion (female side protrusion 5) of the second plate-like piece 32. Therefore, it is difficult to bring the female-side protrusion 5 (the tip) sufficiently close to the male-side protrusion 6 (the contact surface 602 thereof), and there is a high possibility that the engagement of both the protrusions 5 and 6 is likely to be released. Therefore, by making the protruding portion 51 of the female-side protrusion 5 bend with respect to the base end portion 50 on the side opposite to the second plate-like piece 32 (that is, away from the second plate-like piece 32), The above-described effect that the male projection 6 can be more reliably engaged with the female projection 5 can be obtained more effectively.
その他、実施例１と同様の構成により実施例１と同様の作用効果を得る。
In addition, the same effect as that of the first embodiment is obtained by the same configuration as that of the first embodiment.
［他の実施例］
以上、本発明を実現するための形態を、実施例に基づいて説明してきたが、本発明の具体的な構成は実施例に限定されるものではなく、発明の要旨を逸脱しない範囲の設計変更等があっても、本発明に含まれる。例えば、エルボ用カバーの材料は弾性変形可能なものであればよく、金属（板金）に限らず、例えば樹脂であってもよい。この場合、雌側係合部等を一体に成形する必要はなく、複数の部品を結合することで実施例と同様の形状を実現することとしてもよい。実施例では、エルボ用カバーの材料として金属（板金）を用いたため、十分な強度と良好な耐久性を実現することができる。
[Other embodiments]
As mentioned above, although the form for implement | achieving this invention has been demonstrated based on the Example, the concrete structure of this invention is not limited to an Example, The design change of the range which does not deviate from the summary of invention Are included in the present invention. For example, the material of the elbow cover is not limited to metal (sheet metal) as long as it can be elastically deformed, and may be resin, for example. In this case, it is not necessary to integrally form the female side engaging portion or the like, and a shape similar to that of the embodiment may be realized by combining a plurality of parts. In the embodiment, since metal (sheet metal) is used as a material for the elbow cover, sufficient strength and good durability can be realized.
