JP3031188B2 - Simple fitting - Google Patents

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、建築物の消火用スプリ
ンクラー設備における枝管からスプリンクラーヘッドま
での配管接続に適した管継手に関し、更に詳しくは、ね
じ結合によらない簡易タイプの管継手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint suitable for pipe connection from a branch pipe to a sprinkler head in a fire extinguisher sprinkler facility for a building, and more particularly to a simple type pipe joint which does not use a screw connection. .

【０００２】[0002]

【従来の技術】建築物に設置される消火用スプリンクラ
ー設備は、周知の通り、水源、加圧送水装置、警報装
置、スプリンクラーヘッド等により構成される。スプリ
ンクラーヘッドは閉鎖形（湿式、乾式、予作動式）と開
放形とに大別されるが、いずれの場合も管継手を用いて
接続される。2. Description of the Related Art As is well known, a fire extinguisher sprinkler system installed in a building includes a water source, a pressurized water supply device, an alarm device, a sprinkler head, and the like. Sprinkler heads are roughly classified into a closed type (wet type, dry type, pre-operation type) and an open type, and in each case, they are connected using a pipe joint.

【０００３】ここで配管材料としてはＪＩＳ Ｇ３４５
２にＳＧＰ白管として規定される配管用炭素鋼管（以下
白管と称す）が、また管継手としてはＪＩＳ Ｂ２３０
１に白継手として規定されるねじ込み式の可鍛鋳鉄製管
継手（以下白継手と称す）が我国では専ら使用されてい
る。[0003] Here, JIS G345 is used as a piping material.
2 is a carbon steel pipe for piping specified as an SGP white pipe (hereinafter referred to as white pipe), and a pipe joint is JIS B230.
A threaded malleable cast iron pipe joint (hereinafter referred to as a white joint) specified as a white joint in (1) is exclusively used in Japan.

【０００４】また、放水性能としては、スプリンクラー
ヘッドを同時に使用した場合に、それぞれの先端におい
て放水圧力が0.０９８ＭＰａ（１ｋｇｆ／ｃｍ² ）以上
0.９８ＭＰａ（１０ｋｇｆ／ｃｍ² ）未満となり、放水
量が閉鎖形で８０リットル／min以上、開放形で１６０リットル
／min 以上確保されることが、我国の消防法施工令で定
められている。[0004] The water discharge performance is such that when the sprinkler heads are used simultaneously, the water discharge pressure at each tip is 0.098 MPa (1 kgf / cm ² ) or more.
It is stipulated by the Fire Service Law in Japan that the water discharge rate is less than 0.98 MPa (10 kgf / cm ² ) and the water discharge amount is at least 80 liter / min in the closed type and 160 liter / min in the open type.

【０００５】我国以外では、白管より肉厚が小さい薄肉
管と組み合わされる打ち込み式の簡易管継手が米国で開
発され、ＰＯＺ−ＬＯＫという商品名で市販されてい
る。この簡易管継手の構造については後で詳しく説明す
る。[0005] Outside of Japan, a simple drive-in type pipe joint combined with a thin-walled pipe having a smaller wall thickness than a white pipe has been developed in the United States, and is marketed under the trade name POZ-LOK. The structure of this simple pipe joint will be described later in detail.

【０００６】[0006]

【発明が解決しようとする課題】我国の消火用スプリン
クラー設備に使用されている白管および白継手は、消防
法施工令に定められる放水圧力の制約を十分に満足して
いるが、白継手がねじ込み式であることに起因して次の
ような問題がある。The white pipes and white joints used in fire-extinguishing sprinkler facilities in Japan sufficiently satisfy the restrictions on water discharge pressure stipulated in the Fire Service Law ordinance. There are the following problems due to the screw-in type.

【０００７】現場で白管の端部にねじ加工を行う必要が
あるので、施工性が悪く、施工コストも高い。そのねじ
加工に高度の技術を要し、施工の不具合による洩れ事故
が発生しやすい。すなわち、信頼性が十分でない。白管
に対するねじ加工により端部の肉厚が減少する。これを
見越して必要以上の肉厚を白管に与えているため、管材
コストが高い。このように、我国で使用される白継手は
施工性、施工経済性、信頼性、材料経済性のいずれにも
問題がある。Since it is necessary to thread the end of the white tube on site, the workability is poor and the construction cost is high. The thread processing requires advanced technology, and leakage accidents are likely to occur due to faulty construction. That is, the reliability is not sufficient. The wall thickness at the end is reduced by threading the white tube. In anticipation of this, the wall thickness is given to the white tube more than necessary, so that the cost of the tube material is high. As described above, white joints used in Japan have problems in workability, construction economics, reliability, and material economy.

【０００８】これに対して、米国で開発された打ち込み
式の簡易管継手は、白継手と比較して施工性、施工経済
性、材料経済性に著しく優れるが、それでも施工性に若
干の問題を残しており、また信頼性は十分とは言えな
い。図７にこの打ち込み式の簡易管継手を示し、その構
造および長所・短所について説明する。[0008] On the other hand, the simple-fitting type pipe joints developed in the United States are remarkably excellent in workability, work economics, and material economy compared with white joints, but still have some problems in workability. It remains, and its reliability is not enough. FIG. 7 shows this simple driving type joint, and its structure, advantages and disadvantages will be described.

【０００９】Ｔ字状の継手本体１はダクタイル鋳鉄から
なる。その両側の端部内には管Ｐ，Ｐの各端部が挿入さ
れる。また、下端部には図示されないスプリンクラーヘ
ッドまたは管Ｐが接続される。そして、各端部には、コ
字形をした管端係止部材２の対向縁部が嵌合する中心線
に直角な２つのスリット３，３が、中心線を挟んで平行
に形成されている。The T-shaped joint body 1 is made of ductile cast iron. The ends of the pipes P, P are inserted into the ends on both sides thereof. A sprinkler head or a pipe P (not shown) is connected to the lower end. At each end, two slits 3, 3 perpendicular to the center line at which the opposed edges of the U-shaped tube end locking member 2 are fitted are formed in parallel with the center line interposed therebetween. .

【００１０】施工においては、継手本体１の端部内に管
端部を挿入する。次いで、スリット３，３に沿って管端
係止部材２を打ち込む。これにより、管端部のスリット
３，３に対応する部分が凹み、各凹みにくさび部材２の
対向縁部が嵌合することにより、管端部が抜け止めされ
る。また、凹みと管端との間において、継手本体１の端
部内面と管端部外面との間がＯリング４により全周にわ
たってシールされる。In the construction, a pipe end is inserted into an end of the joint body 1. Next, the pipe end locking member 2 is driven along the slits 3 and 3. Thereby, the portions corresponding to the slits 3 and 3 of the tube end are dented, and the opposing edges of the wedge member 2 are fitted into the depressions, so that the tube end is prevented from coming off. Further, between the recess and the pipe end, the space between the inner end face of the joint main body 1 and the outer face of the pipe end is sealed over the entire circumference by the O-ring 4.

【００１１】このような打ち込み式の簡易管継手は、ね
じ加工もねじ込み作業も必要としないので、ねじ込み式
の白継手と比較すると施工性が良く、施工経済性にも優
れる。また、ねじ加工による減肉が管端部に生じないの
で、管の肉厚を薄くでき、材料経済性に優れる。[0011] Such a simple driving type pipe joint does not require any threading or screwing work, and therefore has better workability and is more economical in construction than a screw-in type white joint. In addition, since the wall thickness is not reduced at the end of the pipe due to the threading, the wall thickness of the pipe can be reduced and the material economy is excellent.

【００１２】しかし、管端係止部材が、管端部に形成さ
れた凹みとの摩擦によってしか保持されていないため、
振動や地震による不測の外力を受けたときに外れ落ちる
危険がある。管端係止部材が外れると管端部は継手本体
の端部から容易に抜け出る。従って、信頼性は十分とは
言えない。また、施工時に継手本体とは別に管端係止部
材を常備携帯しておく必要があり、この点において施工
性に若干の問題が残る。However, since the pipe end locking member is held only by friction with the recess formed in the pipe end,
There is a risk of falling off when receiving unexpected external force due to vibration or earthquake. When the pipe end locking member is released, the pipe end easily comes off from the end of the joint body. Therefore, the reliability is not sufficient. In addition, it is necessary to always carry the pipe end locking member separately from the joint main body at the time of construction, and in this regard, there is a slight problem in the workability.

【００１３】ねじ込み式および打ち込み式以外にも各種
の継手形式が存在するが、スプリンクラー用管継手とし
て上述した打ち込み式の簡易管継手より高い総合評価の
ものは存在しない。There are various types of joints other than the screw-in type and the drive-in type, but none of the sprinkler type pipe joints has a higher overall evaluation than the above-mentioned simple type of drive-in type pipe joint.

【００１４】本発明の目的は、従来の打ち込み式簡易管
継手と同等の施工経済性および材料経済性を有し、施工
性および信頼性についてはその管継手を凌ぐ簡易管継手
を提供することにある。An object of the present invention is to provide a simple pipe joint which has the same construction economy and material economy as that of a conventional driven-in simple pipe joint, and which is superior in terms of workability and reliability. is there.

【００１５】[0015]

【課題を解決するための手段】本発明の簡易管継手は、
結合すべき管端部がスリーブ状の端部内に挿入され、該
端部の周方向複数位置に該端部を半径方向に貫通する貫
通孔が設けられた継手本体と、継手本体の端部内に先端
部が突出しないように各貫通孔に挿入保持され、端部外
からの操作により先端部が端部内へ進入して端部内の管
端部を凹ませ、その凹みに先端部が嵌合した状態で抜け
止めされる複数の管端係止部材と、継手本体の端部に設
けられた貫通孔より奥側においてその端部と端部内の管
端部との間に介装されるリング状のシール部材とを具備
する。SUMMARY OF THE INVENTION The simple fitting of the present invention comprises:
A joint body in which a pipe end to be joined is inserted into a sleeve-like end, and a through-hole is provided at a plurality of positions in the circumferential direction of the end in a radial direction through the end, and inside the end of the joint body. The distal end is inserted and held in each through hole so that the distal end does not protrude, the distal end enters the end by an operation from outside the end, the tube end in the end is recessed, and the distal end is fitted into the recess A plurality of pipe end locking members which are prevented from falling off in a state, and a ring-shaped member interposed between the end and a pipe end in the end on the back side of a through hole provided at an end of the joint body. And a sealing member.

【００１６】管端係止部材を抜け止めする方式は次の３
種類である。 管端係止部材の先端部が継手本体の端
部内に進入したときに、管端部からの反力により先端部
が軸方向に圧潰変形して拡径する圧壊方式（第１実施
例）。 管端係止部の先端部が弾性的に縮径変形して
貫通孔内に挿入され、その先端部が継手本体の端部内に
進入したときに先端部が大径状態に復元する弾性変形方
式（第２，６実施例）。 管端係止部材が貫通孔に深
く挿入されるに従ってその管端係止部材が貫通孔の内面
から強い締め付け力を受ける、くさび部材の使用による
くさび方式（第３，４，５実施例）。The following three methods are used to prevent the tube end locking member from coming off.
Kind . A crush method in which when the tip of the pipe end locking member enters the end of the joint body, the tip is crushed and deformed in the axial direction by a reaction force from the pipe end to expand the diameter (first embodiment). An elastic deformation method in which the distal end of the tube end locking portion is elastically reduced in diameter and inserted into the through hole, and the distal end is restored to a large diameter state when the distal end enters the end of the joint body. (Second and sixth embodiments). As the pipe end locking member is inserted deeper into the through hole, the pipe end locking member receives a strong clamping force from the inner surface of the through hole. Example).

【００１７】弾性変形方式としては、例えば管端係止部
材の先端部自体を弾性変形させるもの（第２実施例）
と、その先端部に弾性変形部材を組み合わせるもの（第
６実施例）とを挙げることができる。As an elastic deformation method, for example, a method of elastically deforming the distal end portion of a tube end locking member (second embodiment)
And a combination of the tip with an elastically deformable member (sixth embodiment).

【００１８】くさび方式としては、例えば管端係止部材
そのものをくさび部材とするもの（第５実施例）と、管
端係止部材の先端部を拡径可能にするとともに、その先
端面にテーパー穴を設け、管端部からの反力によりその
テーパー穴にくさび部材を圧入するもの（第３，４実施
例）とを挙げることができる。As the wedge method, for example, a pipe end locking member itself is used as a wedge member (fifth embodiment), and the tip end of the pipe end locking member can be expanded in diameter and the tip end surface is tapered. An example in which a hole is provided and a wedge member is press-fitted into the tapered hole by a reaction force from the pipe end (the third and fourth embodiments) can be given.

【００１９】管端係止部材の先端部を変形させる方式で
は、その変形を容易ならしめるために、中心線を通るス
リットにより先端部を細分割するのが良い。In the method of deforming the distal end portion of the tube end locking member, it is preferable to subdivide the distal end portion by a slit passing through the center line in order to facilitate the deformation.

【００２０】いずれの方式においても、管端係止部材は
打ち込み等により貫通孔内を直進する直進形（第１，２
実施例）でも、貫通孔内にねじ込まれるねじ込み形（第
３，４，５，６実施例）でもよい。In any of the systems, the pipe end locking member is a straight type (first and second type) which advances straight in the through hole by driving or the like.
Embodiment) or a screw-in type (the third, fourth, fifth and sixth embodiments) which is screwed into the through hole.

【００２１】管端係止部材がねじ込み形の場合は、その
ねじにより管端係止部材が保持される。管端係止部材が
直進形の場合は、その保持に接着剤（第１実施例）や、
弾性的な縮径変形による反力（第２実施例）等を用いる
ことができる。When the pipe end locking member is of a screw type, the screw holds the pipe end locking member. When the pipe end locking member is of a straight type, an adhesive (the first embodiment) may be used for holding the pipe end locking member.
It is possible to use a reaction force (second embodiment) due to elastic contraction.

【００２２】[0022]

【作用】継手本体の端部内に管端部を挿入した後、その
端部に装備されている複数の管端係止部材を操作して端
部内に進入させる。そうすると、各管端係止部材の先端
に折されて管端部が周方向に複数位置において内側へ凹
み、凹みに各管端係止部材の先端部が嵌合することによ
り、管端部が抜け止めされると共に、この状態で各管端
係止部材も抜け止めされる。また、管端係止部材より奥
側において継手本体の端部と端部内の管端部との間がシ
ール部材によりシールされる。After inserting the pipe end into the end of the joint body, a plurality of pipe end locking members provided at the end are operated to enter the end. Then, the pipe ends are bent at the distal ends of the respective pipe end locking members, and the pipe ends are depressed inward at a plurality of positions in the circumferential direction. At this time, the tube end locking members are also prevented from falling off. Further, a portion between the end of the joint main body and the end of the tube in the end on the back side of the tube end locking member is sealed by a seal member.

【００２３】[0023]

【実施例】以下に本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.

【００２４】図１に本発明の第１実施例を示す。本実施
例は消火用スプリンクラー設備における枝管からスプリ
ンクラーヘッドまでの配管接続に使用される。継手本体
１０は図７に示した従来の打ち込み式簡易管継手の継手
本体と基本的に同じ形をしており、その継手本体とは端
部の構造が異なる。FIG. 1 shows a first embodiment of the present invention. This embodiment is used for pipe connection from a branch pipe to a sprinkler head in a fire extinguishing sprinkler facility. The joint body 10 has basically the same shape as the joint body of the conventional driven-in simple pipe joint shown in FIG. 7 , and has a different end structure from the joint body.

【００２５】継手本体１０の各端部には、管Ｐの端部が
収容されるように内径を他の部分より大きくした管端収
容部１１が設けられている。管端収容部１１と他の部分
との境界部内面は、端部の中心線に直角な管端ストッパ
ー１３である。At each end of the joint body 10, there is provided a tube end accommodating portion 11 having an inner diameter larger than other portions so as to accommodate the end of the tube P. The inner surface of the boundary between the tube end accommodating portion 11 and another portion is a tube end stopper 13 perpendicular to the center line of the end.

【００２６】管端収容部１１の先端部分には、その管端
収容部１１を半径方向に貫通する複数の貫通孔１２が、
周方向に等間隔をあけて設けられている。各貫通孔１２
は内面が平坦なストレート孔であり、それぞれにリベッ
ト状の管端係止部材２０が挿入されている。貫通孔１２
の継手内面側の端部は、後述する管端係止部材２０の先
端部の拡径変形を許容するために他の部分より内径が大
きい大径部１５になっている。A plurality of through holes 12 penetrating through the tube end housing 11 in the radial direction are formed at the distal end portion of the tube end housing 11.
They are provided at equal intervals in the circumferential direction. Each through hole 12
Is a straight hole having a flat inner surface, into which a rivet-shaped pipe end locking member 20 is inserted. Through hole 12
The end on the inner surface side of the joint is a large-diameter portion 15 having an inner diameter larger than other portions in order to allow the tip end of the tube end locking member 20 to be expanded and deformed as described later.

【００２７】管端収容部１１の貫通孔１２とストッパー
１３との間の内面には、環状の弾性シール部材３０を嵌
合保持する凹溝１４が全周にわたって設けられている。On the inner surface between the through hole 12 and the stopper 13 of the tube end accommodating portion 11, a concave groove 14 for fitting and holding the annular elastic seal member 30 is provided over the entire circumference.

【００２８】貫通孔１２に挿入されるリベット状の管端
係止部材２０は、管端収容部１１の肉厚より十分に大き
い長さを有し、先端が管端収容部１１内へ突出しない状
態で接着剤２５により貫通孔１２内に保持固定されてい
る。The rivet-shaped tube end locking member 20 inserted into the through hole 12 has a length sufficiently larger than the wall thickness of the tube end accommodating portion 11, and the tip does not protrude into the tube end accommodating portion 11. In this state, it is held and fixed in the through hole 12 by the adhesive 25.

【００２９】管端係止部材２０の挿入方向後部は大径の
頭部２１である。頭部２１の先端側には、胴部２２を介
して易変形部２３が設けられている。易変形部２３は管
端係止部材２０の先端部に位置し、中心線を通る複数の
スリット２４，２４により周方向に細分割されている。
これにより、易変形部２３は軸方向の圧縮力を受けたと
きに容易に圧潰し拡径変形する。The rear end of the tube end locking member 20 in the insertion direction is a large diameter head 21. An easily deformable portion 23 is provided on the distal end side of the head 21 via a trunk 22. The easily deformable portion 23 is located at the distal end of the tube end locking member 20, and is subdivided in the circumferential direction by a plurality of slits 24 passing through the center line.
Thereby, the easily deformable portion 23 is easily crushed and expanded and deformed when it receives an axial compressive force.

【００３０】本実施例においては、継手本体１０の管端
収容部１１に管端部が次のようにして結合される。In this embodiment, the pipe end is connected to the pipe end accommodating portion 11 of the joint body 10 as follows.

【００３１】管端収容部１１の凹溝１４内にシール部材
３０を装着した状態で、管端がストッパー１３に当たる
まで管端部を管端収容部１１内に挿入する。その後、複
数の管端係止部材２０を管端収容部１１の外側から頭部
２１が管端収容部１１に当たるまで内側へ打ち込む。With the seal member 30 mounted in the concave groove 14 of the tube end accommodating portion 11, the tube end is inserted into the tube end accommodating portion 11 until the tube end hits the stopper 13. Thereafter, the plurality of tube end locking members 20 are driven inward from the outside of the tube end housing portion 11 until the head 21 hits the tube end housing portion 11.

【００３２】これにより、管端部の周方向複数位置が管
端係止部材２０に押されて凹む。同時に、管端係止部材
２０の先端部、すなわち易変形部２３が軸方向に圧潰
し、貫通孔１２の大径部１５内を含む管端収容部１１の
内側において貫通孔１２の小径部内径より大きい外径に
拡径変形する。As a result, a plurality of positions in the circumferential direction of the tube end are pressed by the tube end locking member 20 to be recessed. At the same time, the distal end portion of the tube end locking member 20, that is, the easily deformable portion 23 is crushed in the axial direction, and the inside diameter of the small diameter portion of the through hole 12 inside the tube end housing portion 11 including the inside of the large diameter portion 15 of the through hole 12. It expands and deforms to a larger outer diameter.

【００３３】そして、管端部に形成された凹みに拡径変
形した易変形部２３が嵌合することにより、管端部が抜
け止めされる。また、易変形部２３が貫通孔１２の大径
部内を含む管端収容部１１の内側において拡径変形する
ことにより、管端係止部材２０が抜け止めされる。The tube end is prevented from coming off by fitting the easily deformable portion 23 whose diameter has been deformed into the recess formed in the tube end. In addition, since the easily deformable portion 23 expands and deforms inside the tube end accommodating portion 11 including the inside of the large diameter portion of the through hole 12, the tube end locking member 20 is prevented from falling off.

【００３４】従来の打ち込み式簡易管継手と比較した場
合、本実施例の簡易管継手は、管端部にねじ加工を施す
必要がなく、ねじ込み作業も不要であるという点におい
て、共に施工性、施工経済性および材料経済性に優れ
る。When compared with the conventional simple driving type pipe fitting, the simple pipe fitting of this embodiment does not require threading at the pipe end and does not require screwing work. Excellent construction and material economy.

【００３５】第２に、複数の管端係止部材を打ち込む必
要はあるものの、それぞれが継手本体に一体保持されて
いるので、管端係止部材を常備携帯する必要がない。従
って、総合的な施工性は本実施例の方が高いと言える。Second, although it is necessary to drive in a plurality of tube end locking members, since each is integrally held by the joint body, there is no need to carry the tube end locking members on a regular basis. Therefore, it can be said that this embodiment has higher overall workability.

【００３６】第３に、管端係止部材の打ち込みに伴いそ
の先端部が拡径変形して、管端係止部材を確実に抜け止
めするので、振動や地震等による不測の外力を受けても
管端係止部材が外れない。従って、信頼性は本実施例の
方が格段に高い。Third, as the pipe end locking member is driven, the distal end thereof expands and deforms to reliably prevent the pipe end locking member from coming off. The tube end locking member does not come off. Therefore, the reliability is much higher in this embodiment.

【００３７】なお、管端係止部材の材質寸法、先端部形
状については、打ち込みに伴って管端部を変形させると
同時に自らの先端部も変形するように、これらを決定す
る必要のあることは言うまでもない。It is necessary to determine the material dimensions and the shape of the tip of the tube end locking member so that the tube end is deformed with the driving and at the same time the tip is deformed. Needless to say.

【００３８】図２に本発明の第２実施例を示す。本実施
例が第１実施例と異なるのは、リベット状の管端係止部
材２０の先端部形状である。FIG. 2 shows a second embodiment of the present invention. This embodiment differs from the first embodiment in the shape of the distal end of the rivet-shaped tube end locking member 20.

【００３９】本実施例における管端係止部材２０の先端
部は、外周側から外力を受けたときに弾性的に縮径変形
する易変形部２３である。易変形部２３は、中心線を通
る比較的幅の広い複数のスリット２４，２４により、周
方向に細分割された構造になっている。易変形部２３の
先端部は半球状の大径ヘッド部２６である。大径ヘッド
部２６の最大外径は、貫通孔１２の小径部内径より更に
大きく設定されている。また、スリット２４の幅は大径
ヘッド２６を貫通孔１２内に押し込み得るように設定さ
れている。The distal end of the tube end locking member 20 in the present embodiment is an easily deformable portion 23 which elastically reduces its diameter when receiving an external force from the outer peripheral side. The easily deformable portion 23 has a structure in which it is subdivided in the circumferential direction by a plurality of relatively wide slits 24 passing through the center line. The tip of the easily deformable portion 23 is a hemispherical large-diameter head portion 26. The maximum outer diameter of the large diameter head portion 26 is set to be larger than the inner diameter of the small diameter portion of the through hole 12. The width of the slit 24 is set such that the large-diameter head 26 can be pushed into the through hole 12.

【００４０】本実施例においては、管端係止部材２０の
先端が管端収容部１１内へ突出しないようにしてその管
端係止部材２０が貫通孔１２に押し込まれる。この押し
込みにより、先端部の易変形部２３が弾性的に縮径変形
し、その反力により大径ヘッド部２６の最大外径部分が
貫通孔１２の内面に圧接し、管端係止部材２０が管端収
容部１１に保持される。In the present embodiment, the tube end locking member 20 is pushed into the through hole 12 so that the tip of the tube end locking member 20 does not protrude into the tube end accommodating portion 11. By this pushing, the easily deformable portion 23 at the distal end portion is elastically reduced in diameter, and the maximum outer diameter portion of the large diameter head portion 26 is pressed against the inner surface of the through hole 12 by the reaction force, so that the pipe end locking member 20 is pressed. Is held in the tube end accommodating portion 11.

【００４１】管端収容部１１内に管端部を挿入し、複数
の管端係止部材２０を順番に打ち込むと、管端部の周方
向位置が管端係止部材２０に押されて凹み、その凹みに
管端係止部材２０の先端部が嵌合することにより、管端
部が抜け止めされる。また、先端部の大径ヘッド部２６
が貫通孔１２の大径部１５内を含む管端収容部１１の内
側において元の外径に復元し、管端係止部材２０が抜け
止めされる。When the tube end is inserted into the tube end accommodating portion 11 and a plurality of tube end locking members 20 are sequentially driven in, the circumferential position of the tube end is pushed by the tube end locking member 20 so as to be recessed. By fitting the distal end of the tube end locking member 20 into the recess, the tube end is prevented from coming off. Also, the large diameter head portion 26 at the tip end
Is restored to the original outer diameter inside the tube end accommodating portion 11 including the inside of the large diameter portion 15 of the through hole 12, and the tube end locking member 20 is prevented from coming off.

【００４２】従って、本実施例においても、施工時に管
端係止部材２０を携帯する必要がなく、且つ簡単な施工
作業で継手本体１０の端部に管端部を確実に結合するこ
とができる。Therefore, also in this embodiment, it is not necessary to carry the pipe end locking member 20 at the time of construction, and the pipe end can be securely connected to the end of the joint body 10 by a simple construction work. .

【００４３】なお、継手本体１０の端部肉厚が薄く、貫
通孔１２の長さを十分に確保しにくい場合は、本実施例
のように、貫通孔１２の周囲を部分的に増肉するとよ
い。When the thickness of the end of the joint body 10 is small and it is difficult to secure a sufficient length of the through hole 12, it is necessary to partially increase the thickness of the periphery of the through hole 12 as in this embodiment. Good.

【００４４】図３に本発明の第３実施例を示す。本実施
例は、継手本体１０の貫通孔１２および貫通孔１２に挿
入保持される管端係止部材２０が、前記第１，２実施例
と異なる。FIG. 3 shows a third embodiment of the present invention. This embodiment differs from the first and second embodiments in the through hole 12 of the joint body 10 and the pipe end locking member 20 inserted and held in the through hole 12.

【００４５】本実施例における貫通孔１２は、内面に雌
ねじが形成された平行ねじ孔とされている。管端係止部
材２０はそのねじ孔にねじ込まれるストレートなボルト
２０ａと、ボルト２０ａの先端部に装着されるくさび部
材２０ｂとからなる。ボルト２０ａは、先端部に易変形
部２３を有する。易変形部２３は、弾性的に拡径変形す
るように、中心線を通る複数のスリット２４，２４によ
り周方向に細分割されている。易変形部２３の中心部に
は、先端へ向かって内径が徐々に増大するテーパー穴２
７が設けられている。くさび部材２０ｂはテーパー穴２
７に嵌合する円錐体であり、その先端面は半球状に膨出
変形している。またくさび部材２０ｂは、テーパー穴２
７から不用意に脱離しないよう接着剤２５で仮止めされ
ている。The through hole 12 in this embodiment is a parallel screw hole having an internal thread formed on the inner surface. The tube end locking member 20 includes a straight bolt 20a screwed into the screw hole, and a wedge member 20b attached to the tip of the bolt 20a. The bolt 20a has an easily deformable portion 23 at the tip. The easily deformable portion 23 is subdivided in the circumferential direction by a plurality of slits 24 passing through the center line so as to elastically expand the diameter. The center of the easily deformable portion 23 has a tapered hole 2 whose inner diameter gradually increases toward the tip.
7 are provided. The wedge member 20b has a tapered hole 2
7, the tip of which is bulged and deformed into a hemisphere. Further, the wedge member 20b has the tapered hole 2
7 is temporarily fixed with an adhesive 25 so as not to be inadvertently detached.

【００４６】管端収容部１１内に管端部を挿入し、複数
のボルト２０ａを順番にねじ込むと、接着剤２５で仮止
めされたくさび２０ｂはテーパー穴２７から解かれて可
動状態となる。そして、管端部の周方向複数位置がくさ
び部材２０ｂに押されて凹み、その凹みにくさび部材２
０ｂの先端部が嵌合することにより、管端部が抜け止め
される。また、管端部をくさび部材２０ｂが押圧したこ
とによる反力により、そのくさび部材２０ｂがボルト２
０ａのテーパー穴２７内へ深く侵入し、ボルト２０ａの
易変形部２３が貫通孔１２内で拡径変形するので、ボル
ト２０ａが抜け止めされる。When the tube end is inserted into the tube end accommodating portion 11 and a plurality of bolts 20a are screwed in order, the wedge 20b temporarily fixed by the adhesive 25 is released from the tapered hole 27 and becomes movable. Then, a plurality of circumferential positions of the pipe end are pressed by the wedge member 20b and dented, and the wedge member 2
By fitting the leading end of Ob, the tube end is prevented from coming off. In addition, the wedge member 20b is pressed by the wedge member 20b against the pipe end, and the wedge member 20b is
The deeply-deformed portion 23 of the bolt 20a is deeply deformed in the through-hole 12 so that the bolt 20a is prevented from coming off.

【００４７】従って、本実施例においても、施工時に管
端係止部材２０を携帯する必要がなく、且つ簡単な施工
作業で継手本体１０の端部に管端部を確実に結合するこ
とができる。Therefore, also in this embodiment, it is not necessary to carry the pipe end locking member 20 at the time of construction, and the pipe end can be securely connected to the end of the joint body 10 by a simple construction work. .

【００４８】図４に本発明の第４実施例を示す。本実施
例が第３実施例と異なるのは、ボルト２０ａの先端部に
設けられたテーパー穴２７の内面にテーパー雌ねじが形
成され、テーパー穴２７に挿入されるくさび部材２０ｂ
の外面に、その雌ねじに対応するテーパー雄ねじが形成
されている点である。FIG. 4 shows a fourth embodiment of the present invention. This embodiment is different from the third embodiment in that a tapered female screw is formed on the inner surface of a tapered hole 27 provided at the tip of a bolt 20a, and a wedge member 20b inserted into the tapered hole 27.
Is formed on the outer surface of the tapered male screw corresponding to the female screw.

【００４９】本実施例においては、ボルト２０ａのテー
パー穴２７内にくさび部材２０ｂがねじ込まれているの
で、くさび部材２０ｂの不用意な脱離が防止される。ボ
ルト２０ａをねじ込むと、管端部がくさび部材２０ｂに
押されて凹む。このとき、管端部との摩擦により、くさ
び部材２０ｂがテーパー穴２７内に深くねじ込まれる。
従って、本実施例においてもボルト２０ａのねじ込みに
伴ってその易変形部２３が拡径変形し、管端係止部材２
０が抜け止めされる。In this embodiment, since the wedge member 20b is screwed into the tapered hole 27 of the bolt 20a, the wedge member 20b is prevented from being accidentally detached. When the bolt 20a is screwed in, the pipe end is pressed by the wedge member 20b and dented. At this time, the wedge member 20b is screwed deeply into the tapered hole 27 due to friction with the pipe end.
Therefore, also in this embodiment, the easily deformable portion 23 is expanded and deformed in accordance with the screwing of the bolt 20a, and the pipe end locking member 2
0 is retained.

【００５０】図５に本発明の第５実施例を示す。本実施
例も基本的には第３，４実施例と同じねじ込み式（ボル
トタイプ）の管端係止部材２０を用いるが、第３，４実
施例とは貫通孔１２の内面雌ねじが継手内側へ向かって
内径が徐々に減少するテーパーねじである点、管端係止
部材２０の外面がそのテーパー雌ねじに対応するテーパ
ー雄ねじである点、管端係止部材２０の先端部に易変形
部２３がなくくさび部材が省略されている点で相違して
いる。FIG. 5 shows a fifth embodiment of the present invention. This embodiment also basically uses the same screw-in type (bolt type) pipe end locking member 20 as the third and fourth embodiments, but differs from the third and fourth embodiments in that the internal female screw of the through-hole 12 is A tapered screw whose inner diameter gradually decreases toward the end, a point that the outer surface of the tube end locking member 20 is a tapered male screw corresponding to the tapered female screw, and an easily deformable portion 23 at the distal end of the tube end locking member 20. The difference is that the wedge member is omitted.

【００５１】本実施例においては、ボルトタイプの管端
係止部材２０をねじ込むことによりその先端部で管端部
が直接押されて凹み、管端部が抜け止めされる。また、
管端係止部材２０のねじ込みに伴ってその外面が貫通孔
１２の内面に強く圧接するので、くさび部材を省略して
いるにもかかわらず、その抜け止めが行われる。In this embodiment, when the bolt-type pipe end locking member 20 is screwed in, the pipe end is pressed directly at the tip thereof so that the pipe end is depressed and the pipe end is prevented from coming off. Also,
Since the outer surface of the tube end locking member 20 is strongly pressed against the inner surface of the through hole 12 with the screwing of the tube end locking member 20, the wedge member is prevented from being removed even though the wedge member is omitted.

【００５２】従って、本実施例においても、施工時に管
端係止部材２０を携帯する必要がなく、且つ簡単な施工
作業で継手本体１０の端部に管端部を確実に結合するこ
とができる。Therefore, also in this embodiment, it is not necessary to carry the pipe end locking member 20 at the time of construction, and the pipe end can be securely connected to the end of the joint body 10 by a simple construction work. .

【００５３】図６に本発明の第６実施例を示す。本実施
例はねじ込み式であるが、本質的には弾性変形タイプの
第２実施例に類似する。そして、第２実施例とはボルト
２０ａを使用する点、ボルト２０ａの下端部外面に設け
た環状溝２９にスプリットリング２０ｃが嵌合保持され
ている点が相違する。FIG. 6 shows a sixth embodiment of the present invention. This embodiment is a screw-in type, but is essentially similar to the second embodiment of the elastic deformation type. The second embodiment differs from the second embodiment in that a bolt 20a is used, and that a split ring 20c is fitted and held in an annular groove 29 provided on the outer surface of the lower end of the bolt 20a.

【００５４】すなわち、本実施例においては、管端係止
部材２０がボルト２０ａとスプリットリング２０ｃとか
らなる。スプリットリング２０ｃは周方向の一部を除去
した縮径可能な弾性リングであり、外力を受けない状態
で貫通孔１２の小径部内径より大きい外径を有する。That is, in this embodiment, the pipe end locking member 20 is composed of the bolt 20a and the split ring 20c. The split ring 20c is an elastic ring whose diameter in the circumferential direction is removed and whose diameter can be reduced, and has an outer diameter larger than the inner diameter of the small diameter portion of the through-hole 12 without receiving any external force.

【００５５】本実施例においては、スプリットリング２
０ｃを縮径変形させた状態でボルト２０ａが貫通孔１２
にねじ込まれている。管端収容部１１内に管端部を挿入
した後、ホルト２０ａを更にねじ込むと、ボルト２０ａ
の先端で管端部が押圧されて凹むと共に、スプリットリ
ング２０ｃが管端収容部１１内（ここでは貫通孔１２の
大径部１５内）に進出して元の外径に広がる。In this embodiment, the split ring 2
The bolt 20a is inserted into the through hole 12 in a state where the diameter of the bolt 20a is reduced.
Screwed into. After the tube end is inserted into the tube end accommodating portion 11, the holt 20a is further screwed into the bolt 20a.
The pipe end is pressed and depressed at the tip of the pipe, and the split ring 20c advances into the pipe end accommodating portion 11 (here, inside the large diameter portion 15 of the through hole 12) and expands to the original outer diameter.

【００５６】従って、本実施例においても、管端部の抜
け止めと管端係止部材２０の抜け止めとが行われる。Accordingly, also in the present embodiment, the tube end is prevented from coming off and the tube end locking member 20 is prevented from coming off.

【００５７】表１は第１〜６実施例に採用されている管
端係止部材の抜け止め方式、施工方式、保持方式を整理
して示したものである。Table 1 shows the arrangements of the pipe end locking members used in the first to sixth embodiments in order to prevent them from falling off, to construct them, and to maintain them.

【００５８】[0058]

【表１】 [Table 1]

【００５９】管端係止部材の抜け止め方式については、
部材先端部が継手本体の端部内で拡径変形する圧壊方式
および弾性変形方式が、管端係止部材の抜け止め確実性
に優れる。ただし、管に対する抜け止めは、部材先端部
が定形である弾性変形方式およびくさび方式が確実であ
る。弾性変形方式は更にねじ込みを行わない直進型の場
合にも抜け止め部材を自己保持でき、接着剤等を必要と
しない利点もある。部品点数の面では圧壊方式とくさび
部材を使用しないくさび方式が有利である。Regarding the method of preventing the tube end locking member from coming off,
The crushing method and the elastic deformation method in which the distal end of the member expands and deforms in the end of the joint main body are excellent in the reliability of preventing the tube end locking member from coming off. However, the elastic deformation method and the wedge method, in which the distal end of the member is fixed, are surely prevented from falling off the pipe. The elastic deformation method has an advantage that the retaining member can be held by itself even in the case of a straight type in which screwing is not performed, and an adhesive or the like is not required. In terms of the number of parts, the crushing method and the wedge method using no wedge member are advantageous.

【００６０】管端係止部材の施工方式については、打ち
込み方式の方が施工容易であるが、部材推進量の管理が
容易なねじ込み方式の方が管の抜け止め安定性は高い。As for the application method of the pipe end locking member, the driving method is easier, but the screw-in method, in which the control of the propulsion amount of the member is easier, has higher stability in preventing the pipe from coming off.

【００６１】管端係止部材の保持方式については、復元
力によるものが接着剤やねじ込み作業を必要とせず、組
み立てが容易であるが、確実性は接着やねじの方が高
い。As for the holding method of the tube end locking member, the method using the restoring force does not require an adhesive or a screwing operation and is easy to assemble, but the bonding or the screw is higher in reliability.

【００６２】[0062]

【発明の効果】以上に説明した通り、本発明の簡易管継
手は、継手本体の端部内に管端係止部材の先端部を進入
させて、端部内の管端部を凹ませることにより管端部を
抜け止めするので、管端部にねじ加工を行う必要がな
く、ねじ込み作業も不要であるのので、施工性および施
工経済性に優れる。管の肉厚を余分に確保する必要がな
いので、材料経済性にも優れる。継手本体の端部に管端
係止部材が保持されているので、施工時に管端係止部材
を常備携帯する必要がなく、この点においても施工性が
優れる。その管端係止部材が施工後に抜け止めされるの
で、振動や地震等の不測の外力を受けても管端係止部材
が外れず、管端部が不用意に抜けないので、信頼性が非
常に高い。As described above, the simple pipe joint according to the present invention has a pipe formed by making the distal end of the pipe end engaging member enter the end of the joint body and recessing the pipe end in the end. Since the end is prevented from coming off, there is no need to thread the pipe end, and no screwing work is required, so that the workability and construction economy are excellent. Since there is no need to secure an extra wall thickness of the pipe, material economy is excellent. Since the pipe end locking member is held at the end of the joint main body, it is not necessary to carry the pipe end locking member with it at the time of construction, and the workability is also excellent in this respect. Since the pipe end locking member is prevented from falling out after construction, even if it receives unexpected external force such as vibration or earthquake, the pipe end locking member does not come off and the pipe end does not come off accidentally, so reliability is improved. Very high.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の第１実施例を示す管継手の端部構造説
明図である。FIG. 1 is an explanatory view of an end structure of a pipe joint according to a first embodiment of the present invention.

【図２】本発明の第２実施例を示す管継手の端部構造説
明図である。FIG. 2 is an explanatory view of an end structure of a pipe joint according to a second embodiment of the present invention.

【図３】本発明の第３実施例を示す管継手の端部構造説
明図である。FIG. 3 is an explanatory view of an end structure of a pipe joint according to a third embodiment of the present invention.

【図４】本発明の第４実施例を示す管継手の端部構造説
明図である。FIG. 4 is an explanatory view of an end structure of a pipe joint according to a fourth embodiment of the present invention.

【図５】本発明の第５実施例を示す管継手の端部構造説
明図である。FIG. 5 is an explanatory view of an end structure of a pipe joint according to a fifth embodiment of the present invention.

【図６】本発明の第６実施例を示す管継手の端部構造説
明図である。FIG. 6 is an explanatory view of an end structure of a pipe joint according to a sixth embodiment of the present invention.

【図７】従来の管継手の構造説明図である。FIG. 7 is a structural explanatory view of a conventional pipe joint.

【符号の説明】[Explanation of symbols]

１０ 継手本体 １１ 管端収容部 １２ 貫通孔 ２０ 管端係止部材 ２０ａ ボルト ２０ｂ くさび部材 ２０ｃ スプリットリング ２３ 易変形部 ２７ テーパー穴 ３０ 弾性シール部材 DESCRIPTION OF SYMBOLS 10 Joint main body 11 Pipe end accommodating part 12 Through-hole 20 Pipe end locking member 20a Bolt 20b Wedge member 20c Split ring 23 Deformable part 27 Taper hole 30 Elastic seal member

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 結合すべき管端部がスリーブ状の端部内
に挿入され、該端部の周方向複数位置に、該端部を半径
方向に貫通する貫通孔が設けられた継手本体と、 継手本体の端部内に先端部が突出しないように各貫通孔
に挿入保持され、端部外からの操作により先端部が端部
内へ進入して端部内の管端部を凹ませ、その凹みに先端
部が嵌合した状態で抜け止めされる複数の管端係止部材
と、 継手本体の端部に設けられた貫通孔より奥側においてそ
の端部と端部内の管端部との間に介装されるリング状の
シール部材とを具備し、 前記管端係止部材を抜け止めする方式は、管端係止部材
の先端部が継手本体の端部内に進入したときに、管端部
からの反力により先端部が軸方向に圧潰変形して拡径す
る圧壊方式である簡易管継手。 1. A joint body having a tube end to be joined inserted into a sleeve-like end, and having a through hole radially penetrating the end at a plurality of circumferential positions of the end. Inserted and held in each through hole so that the tip does not protrude into the end of the joint body, the tip enters the end by operation from the outside of the end, dents the pipe end inside the end, and A plurality of pipe end locking members that are prevented from falling off in a state where the distal ends are fitted, and between the end and the pipe end within the end on the back side of the through hole provided at the end of the joint body A ring-shaped seal member interposed therebetween , wherein the pipe end locking member is prevented from coming off.
When the tip of the pipe enters the end of the fitting body,
The tip is crushed and deformed in the axial direction by the reaction force from
A simple pipe joint that uses a crushing method. 【請求項２】 結合すべき管端部がスリーブ状の端部内
に挿入され、該端部の周方向複数位置に、該端部を半径
方向に貫通する貫通孔が設けられた継手本体と、 継手本体の端部内に先端部が突出しないように各貫通孔
に挿入保持され、端部外からの操作により先端部が端部
内へ進入して端部内の管端部を凹ませ、その凹みに先端
部が嵌合した状態で抜け止めされる複数の管端係止部材
と、 継手本体の端部に設けられた貫通孔より奥側においてそ
の端部と端部内の管端部との間に介装されるリング状の
シール部材とを具備し、 前記管端係止部材を抜け止めする方式は、管端係止部の
先端部が弾性的に縮径変形して貫通孔内に挿入され、そ
の先端部が継手本体の端部内に進入したときに先端部が
大径状態に復元する弾性変形方式である簡易管継手。 2. A joint body in which a pipe end to be joined is inserted into a sleeve-shaped end, and a through-hole is provided at a plurality of circumferential positions of the end in a radial direction through the end. Inserted and held in each through hole so that the tip does not protrude into the end of the joint body, the tip enters the end by operation from the outside of the end, dents the pipe end inside the end, and A plurality of pipe end locking members that are prevented from falling off in a state where the distal ends are fitted, and between the end and the pipe end within the end on the back side of the through hole provided at the end of the joint body And a ring-shaped seal member interposed therebetween, wherein the pipe end locking member is prevented from coming off, and the tip of the pipe end locking portion is elastically reduced in diameter and inserted into the through hole. , A simple pipe joint that is an elastic deformation type in which the tip is restored to a large diameter state when the tip enters the end of the joint body. 【請求項３】 結合すべき管端部がスリーブ状の端部内
に挿入され、該端部の周方向複数位置に、該端部を半径
方向に貫通する貫通孔が設けられた継手本体と、 継手本体の端部内に先端部が突出しないように各貫通孔
に挿入保持され、端部外からの操作により先端部が端部
内へ進入して端部内の管端部を凹ませ、その凹みに先端
部が嵌合した状態で抜け止めされる複数の管端係止部材
と、 継手本体の端部に設けられた貫通孔より奥側においてそ
の端部と端部内の管端部との間に介装されるリング状の
シール部材とを具備し、 前記管端係止部材を抜け止めする方式は、管端係止部材
が貫通孔に深く挿入されるに従ってその管端係止部材が
貫通孔の内面から強い締め付け力を受ける、くさび部材
の使用によるくさび方式である簡易管継手。 3. A joint body in which a pipe end to be joined is inserted into a sleeve-like end, and a through-hole is provided at a plurality of circumferential positions of the end in a radial direction through the end. Inserted and held in each through hole so that the tip does not protrude into the end of the joint body, the tip enters the end by operation from the outside of the end, dents the pipe end inside the end, and A plurality of pipe end locking members that are prevented from falling off in a state where the distal ends are fitted, and between the end and the pipe end within the end on the back side of the through hole provided at the end of the joint body A ring-shaped seal member interposed therebetween, wherein the pipe end locking member is prevented from coming off. The pipe end locking member is inserted into the through hole as the pipe end locking member is inserted deeper into the through hole. A simple wedge-type pipe joint that uses a wedge member to receive strong tightening force from the inner surface of the pipe.