JP2020088887A - Underground cable flexible split tube - Google Patents

Underground cable flexible split tube Download PDF

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JP2020088887A
JP2020088887A JP2018214597A JP2018214597A JP2020088887A JP 2020088887 A JP2020088887 A JP 2020088887A JP 2018214597 A JP2018214597 A JP 2018214597A JP 2018214597 A JP2018214597 A JP 2018214597A JP 2020088887 A JP2020088887 A JP 2020088887A
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tube
divided
pipe
concave portion
convex portion
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JP7280688B2 (en
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道浩 清水
Michihiro Shimizu
道浩 清水
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Sekisui Chemical Co Ltd
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Abstract

To easily connect divided pieces to each other, improve the workability, and have a simpler structure for a mold used during manufacturing.SOLUTION: A underground cable flexible split tube includes a main body tube 2 that is divided in the circumferential direction, and a concave portion 31 and a convex portion 32 formed in the divided pieces 2A and 2B of the main body tube 2, and the concave portion 31 is formed in a quadrangular shape in a plan view, and the convex portion 32 is formed in a spherical shape that is inscribed in the inner peripheral surface of the concave portion 31 in a plan view, and the divided pieces 2A and 2B are connected to each other in a state in which the concave portion 31 formed in one of the pair of divided pieces 2A and 2B and the convex portion 32 formed in the other divided piece 2B are engaged with each other.SELECTED DRAWING: Figure 3

Description

本発明は、地中ケーブル用自在割管に関する。 The present invention relates to a universal split tube for underground cables.

近年、景観改善や防災等のために、電線等のケーブル及び該ケーブルに関係する設備等を地中に埋設する電線類地中化（無電柱化）が推進されている。このような電線類地中化の一環として、従来、地中に埋設されている電線等のケーブルの地中管路から電柱等へのケーブルの立ち上がり箇所までの地中ケーブルを挿入させることで被う金属製の半割鋼管からなる地中ケーブル用自在割管が知られている（例えば、特許文献１、２参照）。 2. Description of the Related Art In recent years, for the purpose of landscape improvement, disaster prevention, and the like, undergrounding of electric wires (no electric poles) has been promoted in which cables such as electric wires and equipment related to the cables are buried in the ground. As part of the undergrounding of such electric wires, it is necessary to insert an underground cable from the underground conduit of the cable such as an electric wire conventionally buried in the ground to the rising point of the cable to the utility pole. A flexible split pipe for an underground cable made of a metal half-split steel pipe is known (see, for example, Patent Documents 1 and 2).

特許文献１、２には、一対の半割分割片を互いに突き合わせて連結した本体管同士を環状の継手材を介して直列に継ぎ足し、その管内部にケーブル等を収納した状態で地中に埋設され、ケーブルを防護する地中ケーブル用自在割管であって、これら直列に配置される自在割管がそれぞれ継手材を介して折曲げ自在に接続された構成について記載されている。 In Patent Documents 1 and 2, main body pipes in which a pair of half-divided pieces are butted and connected to each other are connected in series via an annular joint material, and the pipes are buried in the ground with a cable and the like housed inside. In addition, a universal split tube for underground cables that protects a cable is described, in which the flexible split tubes arranged in series are connected to each other via a joint material so as to be bendable.

実開平２−６５０３２号公報Japanese Utility Model Publication No. 2-65032 実開昭６２−５４５２６号公報Japanese Utility Model Publication No. 62-54526

上述したような従来の地中ケーブル用自在割管では、半割分割片同士の接続部は、双方の分割片に管軸方向にずらした突片が設けられ、突片同士を重ね合わせて、突片間をボルトで締結しているため、分割片同士の連結作業に時間と手間がかかっていた。また、ケーブルに対して自在割管を取り付けた後に、位置の変更等で自在割管を取り外したり、ケーブルに付け直す場合には、半割分割片同士がボルト締結により固定されているので、施工しにくいという問題があった。そのため、分割片同士の連結部の構造が簡単で、かつ製造時の金型も簡単なものが求められており、その点で改善の余地があった。 In the conventional flexible tube for underground cable as described above, the connecting portion between the half-divided pieces is provided with projecting pieces that are displaced in the tube axial direction on both of the split pieces, and the projecting pieces are overlapped with each other. Since the projecting pieces are fastened with bolts, it takes time and effort to connect the split pieces together. In addition, after installing the universal split tube to the cable, if you remove the universal split tube due to changing the position or attach it to the cable, the half split pieces are fixed by bolts. There was a problem that it was difficult to do. Therefore, there is a demand for a simple structure of the connecting portion between the divided pieces and a simple mold at the time of manufacturing, and there is room for improvement in this respect.

そこで、本発明は、上記問題点に鑑みてなされたもので、分割片同士の連結を容易に行うことができ、施工性の向上を図ることができるうえ、製造時に使用する金型をより簡単な構造にできる地中ケーブル用自在割管を提供することを目的としている。 Therefore, the present invention has been made in view of the above problems, can easily connect the divided pieces, it is possible to improve the workability, more simple molds used during manufacturing The purpose of the present invention is to provide a flexible split tube for underground cables that can have various structures.

上記目的を達成するため、本発明に係る地中ケーブル用自在割管は、周方向に分割される本体管と、該本体管の各分割片に形成される凹部および凸部と、を備え、前記凹部は、平面視で多角形状に形成され、前記凸部は、平面視で前記凹部の内周面に内接する球状に形成され、複数の前記分割片のうち一の分割管に形成された前記凹部と、他の分割管に形成された前記凸部とが係合された状態で前記分割片同士が連結されていることを特徴としている。 In order to achieve the above object, an underground cable universal split tube according to the present invention includes a main body tube divided in a circumferential direction, and a concave portion and a convex portion formed in each divided piece of the main body tube, The concave portion is formed in a polygonal shape in a plan view, the convex portion is formed in a spherical shape inscribed in the inner peripheral surface of the concave portion in a plan view, and is formed in one of the plurality of divided pieces. It is characterized in that the divided pieces are connected to each other in a state where the concave portion and the convex portion formed on another divided pipe are engaged with each other.

本発明では、分割片同士を対向させて連結する際に、連結する一の分割管の凹部と、他の分割管の凸部とが内接された状態で係合させることで容易に連結することができる。このときの係合構造が凹部に凸部が内接するように嵌め込むだけの着脱容易な構造となるので、各分割片に分割する際も、凹部と凸部との内接した係合状態を解除することで容易に分割することができる。そのため、地中ケーブルに本体管を取り付ける作業にかかる時間や手間を低減することができ、施工性の向上を図ることができる。
また、本発明では、凹部が平面視で多角形状であって凸部が球状であるから、従来のようなボルト締結による連結構造に比べて製造時の金型を簡単な構造にすることができる。 In the present invention, when connecting the divided pieces so as to face each other, the concave portion of one divided pipe to be connected and the convex portion of the other divided pipe are engaged with each other in an inscribed state to easily connect the divided pipes. be able to. Since the engaging structure at this time is a structure that can be easily attached and detached by simply fitting the convex portion into the concave portion so that the convex portion is inscribed, the engaging state in which the concave portion and the convex portion are inscribed is maintained even when the divided pieces are divided. It can be divided easily by releasing it. Therefore, the time and labor required for the work of attaching the main body pipe to the underground cable can be reduced, and the workability can be improved.
Further, in the present invention, since the concave portion has a polygonal shape in a plan view and the convex portion has a spherical shape, the mold at the time of manufacturing can have a simple structure as compared with the conventional connection structure by bolt fastening. ..

また、本発明に係る地中ケーブル用自在割管は、前記分割片における周方向の一端部に前記凹部が設けられ、他端部に前記凸部が設けられていることが好ましい。 Moreover, it is preferable that the subdividing tube for an underground cable according to the present invention is provided with the concave portion at one end portion in the circumferential direction of the divided piece and the convex portion at the other end portion.

このような構成とすることで、断面視で分割片における対称位置に凹部と凸部を配置することが可能になり、各分割片を同形状とすることができる。これにより、金型を共有化することができ、１つの金型で製造することができる。 With such a configuration, it becomes possible to dispose the concave portion and the convex portion at symmetrical positions in the divided piece in cross-sectional view, and each divided piece can have the same shape. As a result, the molds can be shared, and one mold can be used for manufacturing.

また、本発明に係る地中ケーブル用自在割管は、前記分割片における一端部に前記凹部又は前記凸部が設けられ、他端部にねじ締結によって連結されるヒンジ部が設けられていることを特徴としてもよい。 Further, the universal split pipe for an underground cable according to the present invention is provided with the recessed portion or the raised portion at one end of the split piece and a hinge portion connected to the other end by screw fastening. May be a feature.

この場合には、ヒンジ部を介して各分割片が開閉可能に設けられ、分割片の一端部側の凹部と凸部を係合させることで連結作業を行うことができる。つまり、断面視で分割片の片側の一端部のみの係合で着脱作業を行えるので、施工性を向上させることができる。 In this case, each divided piece is provided so as to be openable and closable via the hinge portion, and the connecting work can be performed by engaging the concave portion and the convex portion on one end side of the divided piece. That is, the work of attaching and detaching can be improved because the attachment/detachment work can be performed by engaging only one end portion on one side of the divided piece in a cross-sectional view.

また、本発明に係る地中ケーブル用自在割管は、前記凹部および凸部は、前記本体管の管軸に沿う管軸方向に複数設けられ、同一の前記分割片において、前記凹部と前記凸部とが前記管軸方向に隣り合っていることが好ましい。 Further, in the underground split cable for a submerged cable according to the present invention, the concave portion and the convex portion are provided in a plurality in a pipe axis direction along the pipe axis of the main body pipe, and in the same divided piece, the concave portion and the convex portion are provided. It is preferable that the portion is adjacent to the tube axial direction.

この場合には、凹部および凸部による連結部が管軸方向の複数箇所に設けられているので、分割片同士の連結が安定し、外れ難い構造となる。 In this case, since the connecting portions including the concave portions and the convex portions are provided at a plurality of positions in the pipe axis direction, the connection between the divided pieces is stable and the structure is hard to come off.

また、本発明に係る地中ケーブル用自在割管は、前記本体管は、管軸方向の一端に配された差口と、前記管軸方向の他端に配された受口と、を備え、前記凹部および凸部は、前記管軸方向で前記差口および前記受口を避けた中央寄りに配置されていることを特徴としてもよい。 Further, in the underground split cable universal split tube according to the present invention, the main body tube includes an outlet arranged at one end in the pipe axis direction and a receiving opening arranged at the other end in the pipe axis direction. The recesses and the protrusions may be arranged near the center in the tube axis direction so as to avoid the inlet and the receptacle.

この場合には、凹部および凸部による連結部の位置が差口および受口を避けた位置となるので、複数の本体管を差口と受口で嵌合させて直列に接続した場合において、本体管同士の曲げ方向の力が凹部および凸部に作用することを抑制でき、分割片同士の連結が安定し、外れ難い構造となる。 In this case, since the position of the connecting portion by the concave portion and the convex portion is a position avoiding the inlet and the outlet, when a plurality of main body pipes are fitted at the inlet and the outlet and connected in series, It is possible to suppress the force in the bending direction between the main body tubes from acting on the concave portion and the convex portion, the connection between the divided pieces is stable, and the structure is hard to come off.

また、本発明に係る地中ケーブル用自在割管は、前記受口には、別の前記本体管の前記差口を前記受口の内部に支持可能に構成された支持部が設けられ、前記受口は、前記支持部から前記管軸方向に沿って離れるに従い漸次、拡径していることを特徴としてもよい。 Further, the underground splitting pipe for underground cables according to the present invention, the receiving port is provided with a support portion configured to be able to support the outlet of another main body pipe inside the receiving port, The receiving opening may gradually increase in diameter as the receiving opening is separated from the supporting portion along the tube axis direction.

この場合には、受口が拡径されているので、この受口に別の本体管の差口が挿入しやすくなり、施工性を向上することができる。 In this case, since the diameter of the receiving port is increased, it is easy to insert another outlet of the main body tube into the receiving port, and the workability can be improved.

本発明の地中ケーブル用自在割管によれば、分割片同士の連結を容易に行うことができ、施工性の向上を図ることができる。しかも、製造時に使用する金型をより簡単な構造とすることができる。 According to the universal split tube for an underground cable of the present invention, the divided pieces can be easily connected to each other, and the workability can be improved. In addition, the mold used during manufacturing can have a simpler structure.

本発明の第１実施形態による地中ケーブルに自在割管を備えた概略構成を示す側面図である。FIG. 1 is a side view showing a schematic configuration in which an underground cable according to a first embodiment of the present invention includes a universal split tube. 図１に示す自在割管の斜視図である。It is a perspective view of the universal split tube shown in FIG. （ａ）は一方の分割片を外周側から見た平面図、（ｂ）は他方の分割片を内周側から見た平面図である。(A) is the top view which looked at one division piece from the outer peripheral side, (b) is the top view which saw the other division piece from the inner circumference side. 図２に示すＡ−Ａ線断面図である。It is the sectional view on the AA line shown in FIG. （ａ）は図３（ａ）に示すＢ−Ｂ線断面図、（ｂ）は図３（ｂ）に示すＣ−Ｃ線断面図である。3A is a sectional view taken along the line BB shown in FIG. 3A, and FIG. 3B is a sectional view taken along the line CC shown in FIG. 連結部の連結前の状態を示す要部拡大した側面図である。It is the side view which expanded the principal part which shows the state before connection of a connection part. 連結方向から見た凹部の平面図であって、（ａ）は凹部に凸部を係合する前の状態の図、（ｂ）は凹部に凸部を係合した状態の図である。It is a top view of the recessed part seen from the connection direction, (a) is a state before engaging the protrusion with the recessed part, (b) is a diagram in which the protrusion is engaged with the recessed part. 受口と差口の係合部を示す断面図である。It is sectional drawing which shows the engaging part of a receiving opening and an inlet. 第２実施形態による自在割管の構成を示す図であって、（ａ）は一方の分割片を外周側から見た平面図、（ｂ）は他方の分割片を内周側から見た平面図である。It is a figure which shows the structure of the universal split pipe by 2nd Embodiment, (a) is the top view which looked at one division piece from the outer peripheral side, (b) is the plane which looked at the other division piece from the inner peripheral side. It is a figure. 図９に示す自在割管における分割片を連結させた状態、かつ受口に差口を係合させた状態で管軸方向から見た正面図である。It is the front view seen from a pipe axis direction in the state which connected the division|segmentation piece in the universal split pipe shown in FIG. 9, and the state which engaged the spigot with the receiving opening. 第３実施形態による自在割管の構成を示す図であって、（ａ）はヒンジ部側から見た平面図、（ｂ）は（ａ）に示すＤ−Ｄ線矢視図である。It is a figure which shows the structure of the universal split tube by 3rd Embodiment, (a) is the top view seen from the hinge part side, (b) is the DD line arrow view shown in (a). 図１１に示す自在割管の構成を示す図であって、（ａ）は一方の分割片を外周側から見た平面図、（ｂ）は他方の分割片を内周側から見た平面図である。It is a figure which shows the structure of the universal split pipe shown in FIG. 11, (a) is the top view which looked at one division piece from the outer peripheral side, (b) is the top view which saw the other division piece from the inner circumference side. Is.

以下、本発明による実施形態の地中ケーブル用自在割管について、図面に基づいて詳細に説明する。 Hereinafter, a universal split tube for an underground cable according to an embodiment of the present invention will be described in detail with reference to the drawings.

（第１実施形態）
図１に示すように、本実施形態による地中ケーブル用自在割管（以下、自在割管１という）は、地中に埋設されている電線等の地中ケーブルＫの地中管路１１から電柱１２に沿う立上り管１３までの地中ケーブルＫを挿通させて被うための管であり、一対の半割管（図２に示す分割片２Ａ、２Ｂ）を組み合わせた管構造をなしている。 (First embodiment)
As shown in FIG. 1, a flexible dividing pipe for an underground cable according to the present embodiment (hereinafter referred to as a flexible dividing pipe 1) is provided from an underground conduit 11 of an underground cable K such as an electric wire buried in the ground. It is a pipe for inserting and covering the underground cable K up to the rising pipe 13 along the telephone pole 12, and has a pipe structure in which a pair of half-split pipes (divided pieces 2A, 2B shown in FIG. 2) are combined. ..

図１では、複数の自在割管１、１、…が直列に接続されている。自在割管１には、直管１０Ａと曲がり管１０Ｂがあり、地中管路１１と立上り管１３の位置に応じた線形に基づいて直管１０Ａと曲がり管１０Ｂのそれぞれの本数等が設定される。
以下では、直管１０Ａについて主に説明するが、曲がり管１０Ｂも管軸が湾曲しているだけの違いであって直管１０Ａと同様の構成である。 In FIG. 1, a plurality of universal split tubes 1, 1,... Are connected in series. The flexible split pipe 1 includes a straight pipe 10A and a bent pipe 10B, and the number of each of the straight pipe 10A and the bent pipe 10B is set based on the linear shape corresponding to the positions of the underground pipe 11 and the rising pipe 13. It
The straight pipe 10A will be mainly described below, but the bent pipe 10B has the same configuration as the straight pipe 10A, except that the pipe axis is curved.

自在割管１は、図２及び図３（ａ）、（ｂ）に示すように、略円筒形状をなし、周方向に二分割される本体管２と、本体管２の各分割片２Ａ、２Ｂの周方向の両端部２ａ、２ｂに設けられる連結部３と、を備えている。 As shown in FIGS. 2 and 3A and 3B, the universal split tube 1 has a substantially cylindrical shape, and a main body tube 2 that is divided into two in the circumferential direction, and each divided piece 2A of the main body tube 2, 2B, and a connecting portion 3 provided at both ends 2a and 2b in the circumferential direction.

自在割管１（本体管２及び連結部３）の素材としては、金属製の部材、可撓性を有して弾性変形可能な樹脂が好ましく、例えばポリ塩化ビニル（ＰＶＣ）が挙げられる。 The material of the flexible split tube 1 (main body tube 2 and connecting portion 3) is preferably a metal member or a flexible and elastically deformable resin, such as polyvinyl chloride (PVC).

本体管２は、上述したように一対の半割形状の分割片２Ａ、２Ｂを前記連結部３によって連結され円筒形状に形成されている。
本体管２は、管軸Ｏ方向の一端に配された差口２１と、管軸Ｏ方向の他端に配された受口２２と、を備えている。本体管２の差口２１は、別の本体管２’（図２の二点鎖線）の受口２２’の内部に支持可能に構成された段差形状の支持部２３が設けられている。
支持部２３は、受口２２に挿入された差口２１の差口側端面２１ａが当接することで、差口２１の挿入方向の移動が規制されることになる。 As described above, the main body tube 2 is formed in a cylindrical shape by connecting the pair of half-split divided pieces 2A and 2B by the connecting portion 3.
The main body pipe 2 is provided with an outlet 21 arranged at one end in the pipe axis O direction and a receiving port 22 arranged at the other end in the pipe axis O direction. The outlet 21 of the main body tube 2 is provided with a step-shaped support portion 23 configured to be supported inside a receiving opening 22′ of another main body tube 2′ (two-dot chain line in FIG. 2).
The support portion 23 is regulated in movement in the insertion direction of the spigot 21 by contact with the spout side end surface 21a of the spigot 21 inserted in the receptacle 22.

受口２２は、支持部２３から管軸Ｏ方向に沿って離れるに従い漸次、拡径したラッパ形状となっている。受口２２には、周方向の一部に管内外を連通し、周方向に長い長方形状の開口部２４が形成されている。開口部２４は、一対の分割片２Ａ、２Ｂのそれぞれの同じ位置であって、かつ互いに径方向に対向する位置に配置されている。 The receiving opening 22 has a trumpet shape in which the diameter gradually increases as the receiving opening 22 moves away from the supporting portion 23 along the tube axis O direction. The receiving opening 22 is formed with a rectangular opening 24 that is long in the circumferential direction and communicates with the inside and outside of the pipe in a part of the circumferential direction. The opening 24 is arranged at the same position in each of the pair of divided pieces 2A, 2B, and at a position facing each other in the radial direction.

差口２１には、図３（ａ）に示すように、差口２１の厚さ方向に貫通して管軸Ｏ方向に沿って延びる一対の第１スリット２５１、２５１と、周方向に延びるとともに一対の第１スリット２５１、２５１における管軸Ｏ方向で差口２１側の端面（差口側端面２１ａ）側の端部同士を繋ぐ第２スリット２５２と、によって切り出された弾性片２５０が設けられている。弾性片２５０は、外周面２１ｂに接続される基端部２５０ａを中心にして弾性変形可能に設けられている。また、弾性片２５０の周方向の長さは開口部２４の周方向の長さよりも小さい寸法となっている。 As shown in FIG. 3A, the inlet 21 has a pair of first slits 251 and 251 penetrating in the thickness direction of the outlet 21 and extending along the tube axis O direction, and extending in the circumferential direction. An elastic piece 250 cut out by the second slit 252 that connects the end portions on the end face side on the side of the inlet 21 (side face 21a on the outlet side) in the pipe axis O direction in the pair of first slits 251, 251 is provided. ing. The elastic piece 250 is provided so as to be elastically deformable around a base end portion 250a connected to the outer peripheral surface 21b. The circumferential length of the elastic piece 250 is smaller than the circumferential length of the opening 24.

弾性片２５０の突出先端部には、外周面２１ｂから径方向外側に向けて膨出する係止爪部２５が形成されている。係止爪部２５は、受口２２に形成された開口部２４に係止可能な位置に設けられ、一対の分割片２Ａ、２Ｂのそれぞれの同じ位置であって、かつ互いに径方向に対向する位置に配置されている。係止爪部２５は、管軸Ｏ方向で差口側端面２１ａから受口２２側に向かうに従い漸次、外周面２１ｂから離れる方向に傾斜した形状をなしている。係止爪部２５は、開口部２４の周方向の長さとほぼ同等の長さとなっている。一方の本体管２の受口２２に他方の本体管２の差口２１が挿入されると、弾性片２５０が弾性的に変形しながら係止爪部２５が受口２２の開口部２４に嵌合される（図８参照）。 A locking claw portion 25 that bulges outward from the outer peripheral surface 21b in the radial direction is formed at the protruding tip portion of the elastic piece 250. The locking claw portion 25 is provided at a position where it can be locked in the opening 24 formed in the receiving port 22, is at the same position of each of the pair of divided pieces 2A, 2B, and faces each other in the radial direction. It is located in a position. The locking claw portion 25 has a shape that gradually inclines in a direction away from the outer peripheral surface 21b as it goes from the outlet side end surface 21a toward the receiving port 22 side in the tube axis O direction. The locking claw portion 25 has a length substantially equal to the circumferential length of the opening 24. When the spout 21 of the other body tube 2 is inserted into the receptacle 22 of the one body tube 2, the locking claw portion 25 is fitted into the opening 24 of the receptacle 22 while the elastic piece 250 is elastically deformed. (See FIG. 8).

各分割片２Ａ、２Ｂは、図３（ａ）、（ｂ）、図４、及び図５（ａ）、（ｂ）に示すように、本実施形態では本体管２を半割にしたものであり、連結部３を含めた形状でそれぞれ同一形状に形成されている。分割片２Ａ、２Ｂの周方向の両端部２ａ、２ｂには、連結部３が設けられている。 In each of the divided pieces 2A and 2B, as shown in FIGS. 3A, 3B, 4 and 5A, 5B, the main body tube 2 is divided in half in the present embodiment. Yes, they are formed in the same shape including the connecting portion 3. A connecting portion 3 is provided at both circumferential ends 2a, 2b of the divided pieces 2A, 2B.

連結部３は、図５（ａ）、（ｂ）、図６、及び図７（ａ）、（ｂ）に示すように、分割片２Ａ、２Ｂの両端部２ａ、２ｂから径方向の外側に向けて突出する突片３０と、分割片２Ａにおける周方向の一端部２ａの突片３０に設けられた凹部３１と、凹部３１に係合するとともに分割片２Ａにおける周方向の他端部２ｂの突片３０に設けられた凸部３２と、を備えている。ここで、凹部３１と凸部３２の係合とは、凹部３１と凸部３２の係合とは、嵌合、あるいは嵌り込む状態である。 As shown in FIGS. 5(a), (b), FIG. 6, and FIGS. 7(a), (b), the connecting portion 3 is radially outward from both end portions 2a, 2b of the split pieces 2A, 2B. Of the protruding piece 30 projecting toward the end, the concave portion 31 provided in the protruding piece 30 of the one end portion 2a in the circumferential direction of the divided piece 2A, the other end portion 2b of the divided piece 2A in the circumferential direction that engages with the concave portion 31. The protrusion 32 provided on the protrusion 30 is provided. Here, the engagement of the concave portion 31 and the convex portion 32 is the engagement or the engagement of the concave portion 31 and the convex portion 32.

連結部３は、図２及び図３（ａ）、（ｂ）に示すように、本体管２の管軸Ｏに沿う管軸Ｏ方向に複数（ここでは２箇所）設けられている。連結部３は、管軸Ｏ方向で差口２１および受口２２を避けた中央寄りに配置されている。そして、連結部３は、同一の分割片２Ａ、２Ｂにおいて、凹部３１と凸部３２とが管軸Ｏ方向に隣り合って配置されている。 As shown in FIGS. 2 and 3A and 3B, a plurality of connecting portions 3 are provided in the pipe axis O direction (here, two locations) along the pipe axis O of the main body pipe 2. The connecting portion 3 is arranged near the center in the direction of the tube axis O, avoiding the inlet 21 and the receptacle 22. Then, in the connecting portion 3, in the same divided pieces 2A and 2B, the concave portion 31 and the convex portion 32 are arranged adjacent to each other in the pipe axis O direction.

突片３０は、連結される分割片２Ａ、２Ｂ同士が連結される連結方向（図６に示す矢印Ｅ方向）に直交する連結面３０ａを有し、この連結面３０ａを連結方向Ｅ側に向けた状態で設けられている。分割片２Ａ、２Ｂは、互いに連結された状態で、それぞれの突片３０の連結面３０ａ同士が面で当接される。 The projecting piece 30 has a connecting surface 30a that is orthogonal to the connecting direction (the arrow E direction shown in FIG. 6) in which the connecting divided pieces 2A and 2B are connected, and the connecting surface 30a faces the connecting direction E side. It is provided in a closed state. The divided pieces 2A and 2B are connected to each other, and the connecting surfaces 30a of the respective projecting pieces 30 are in contact with each other at their surfaces.

凹部３１は、図６及び図７（ａ）、（ｂ）に示すように、連結方向Ｅから見た平面視で多角形状（ここでは正四角形）に形成され、所定の深さで凹んだ形状となっている。凹部３１の内周面３１ａは連結面３０ａに対して垂直であり、底面３１ｂは連結面３０ａに対して平行に配置されている。 As shown in FIGS. 6 and 7A and 7B, the recess 31 is formed in a polygonal shape (here, a regular quadrangle) in a plan view seen from the connecting direction E, and is recessed at a predetermined depth. Has become. The inner peripheral surface 31a of the recess 31 is perpendicular to the connecting surface 30a, and the bottom surface 31b is arranged parallel to the connecting surface 30a.

凸部３２は、前記平面視で凹部３１の内周面３１ａに内接する球状に形成されている。凸部３２の外周部３２ａの外径Ｌ２は、図６及び図７（ａ）に示すように、平面視で凹部３１の対向する２辺の内周面３１ａ、３１ａ同士の離間寸法Ｌ１よりも大きく設定さている。凸部３２の連結面３０ａからの突出高さＨ２は、凹部３１の深さＨ１（連結面３０ａから底面３１ｂまでの深さ寸法）よりも大きく設定されている。
すなわち、凹部３１に凸部３２が嵌め込まれると、図７（ｂ）に示すように、凹部３１の壁面（内周面３１ａ）と凸部３２の外面３２ｂとが圧接した状態となり、その摩擦力によりずれが生じにくくなる。 The convex portion 32 is formed in a spherical shape that is inscribed in the inner peripheral surface 31 a of the concave portion 31 in the plan view. As shown in FIGS. 6 and 7A, the outer diameter L2 of the outer peripheral portion 32a of the convex portion 32 is larger than the distance L1 between the inner peripheral surfaces 31a, 31a of the two opposite sides of the concave portion 31 in plan view. It is set large. The protruding height H2 of the convex portion 32 from the connecting surface 30a is set to be larger than the depth H1 of the concave portion 31 (the depth dimension from the connecting surface 30a to the bottom surface 31b).
That is, when the convex portion 32 is fitted into the concave portion 31, as shown in FIG. 7B, the wall surface (inner peripheral surface 31a) of the concave portion 31 and the outer surface 32b of the convex portion 32 are in pressure contact with each other, and the frictional force thereof is generated. This makes it less likely that misalignment will occur.

ここで、曲がり管１０Ｂは、本体部の管軸方向が所定の曲率で湾曲しており、例えば曲率半径Ｒが０．５ｍＲ以上１．０ｍＲ以下とされており、０．６ｍＲ以上０．８ｍＲ以下が好ましい。
また、直管１０Ａ、１０Ａ同士を角度をつけて直列に接続して全体として湾曲するような線形とすることも可能である。この場合には、接続される直管１０Ａ、１０Ａのそれぞれの管軸Ｏ、Ｏに内接する仮想円の曲率半径Ｒが０．５ｍＲ以上１．０ｍＲ以下とされており、０．６ｍＲ以上０．８ｍＲ以下が好ましい。 Here, in the bent tube 10B, the tube axis direction of the main body portion is curved with a predetermined curvature, and for example, the radius of curvature R is set to 0.5 mR or more and 1.0 mR or less, and 0.6 mR or more and 0.8 mR or less. Is preferred.
It is also possible to connect the straight pipes 10A and 10A in series at an angle to form a linear shape as a whole. In this case, the radius of curvature R of the imaginary circle inscribed in the respective pipe axes O, O of the connected straight pipes 10A, 10A is set to 0.5 mR or more and 1.0 mR or less, and 0.6 mR or more. It is preferably 8 mR or less.

次に、上述した構成の地中ケーブル用自在割管の作用について、図面を用いて詳細に説明する。
本実施形態では、図４及び図６に示すように、一対の分割片２Ａ、２Ｂ同士を対向させて連結する際に、連結する一方の分割片２Ａの凹部３１と、他方の分割管２Ｂの凸部３２とが内接された状態で係合させることで容易に連結することができる。このときの係合構造が凹部３１に凸部３２が内接するように嵌め込むだけの着脱容易な構造となるので、各分割片２Ａ、２Ｂに分割する際も、凹部３１と凸部３２との内接した係合状態を解除することで容易に分割することができる。そのため、図１に示すように、地中ケーブルＫに本体管２を取り付ける作業にかかる時間や手間を低減することができ、施工性の向上を図ることができる。 Next, the operation of the universal split tube for an underground cable having the above-described configuration will be described in detail with reference to the drawings.
In this embodiment, as shown in FIGS. 4 and 6, when the pair of divided pieces 2A and 2B are opposed to each other and are connected, the concave portion 31 of one divided piece 2A to be connected and the other divided pipe 2B are connected. It can be easily connected by engaging with the convex portion 32 in an inscribed state. Since the engaging structure at this time is a structure that can be easily attached/detached by fitting the convex portion 32 into the concave portion 31 so as to be inscribed, the concave portion 31 and the convex portion 32 are also separated from each other when dividing into the divided pieces 2A and 2B. It can be easily divided by releasing the engaged state in which it is inscribed. Therefore, as shown in FIG. 1, it is possible to reduce the time and labor required to attach the main body pipe 2 to the underground cable K, and it is possible to improve the workability.

また、本実施形態では、凹部３１が平面視で四角形状であって凸部３２が球状であるから、従来のようなボルト締結による連結構造に比べて製造時の金型を簡単な構造にすることができる。 In addition, in the present embodiment, since the concave portion 31 has a quadrangular shape in a plan view and the convex portion 32 has a spherical shape, the mold at the time of manufacturing has a simpler structure than the conventional connection structure by bolt fastening. be able to.

また、本実施形態では、断面視で分割片２Ａ、２Ｂにおける対称位置に凹部３１と凸部３２を配置することが可能になり、各分割片２Ａ、２Ｂを同形状とすることができる。これにより、金型を共有化することができ、１つの金型で製造することができる。 Further, in the present embodiment, it becomes possible to dispose the concave portion 31 and the convex portion 32 at symmetrical positions in the divided pieces 2A, 2B in a cross-sectional view, and the divided pieces 2A, 2B can have the same shape. As a result, the molds can be shared, and one mold can be used for manufacturing.

また、本実施形態では、凹部３１および凸部３２による連結部３が管軸Ｏ方向の複数箇所（２箇所）に設けられているので、分割片２Ａ、２Ｂ同士の連結が安定し、外れ難い構造となる。 Further, in the present embodiment, since the connecting portions 3 formed by the concave portions 31 and the convex portions 32 are provided at a plurality of locations (two locations) in the pipe axis O direction, the connection between the split pieces 2A and 2B is stable and difficult to remove. It becomes a structure.

さらに、本実施形態では、図２に示すように、凹部３１および凸部３２による連結部３の位置が差口２１および受口２２を避けた位置となるので、複数の本体管２を差口２１と受口２２で嵌合させて直列に接続した場合において、本体管２同士の曲げ方向の力が凹部３１および凸部３２に作用することを抑制でき、分割片２Ａ、２Ｂ同士の連結が安定し、外れ難い構造となる。 Further, in the present embodiment, as shown in FIG. 2, the position of the connecting portion 3 by the concave portion 31 and the convex portion 32 is a position avoiding the inlet 21 and the receptacle 22, so that the plurality of main body tubes 2 are attached to each other. 21 and fitting in the receiving port 22 and connecting in series, it is possible to suppress the force in the bending direction of the main body tubes 2 from acting on the concave portion 31 and the convex portion 32, and to connect the split pieces 2A and 2B to each other. The structure is stable and hard to come off.

また、本実施形態では、受口２２が拡径されているので、この受口２２に別の本体管２の差口２１が挿入しやすくなり、施工性を向上することができる。 Further, in the present embodiment, since the receiving port 22 is expanded in diameter, it is easy to insert the spout 21 of another main body tube 2 into this receiving port 22, and the workability can be improved.

このように、本実施形態による地中ケーブル用自在割管では、分割片２Ａ、２Ｂ同士の連結部３を簡単な構造とすることで、分割片２Ａ、２Ｂ同士の連結を容易に行うことができるうえ、製造時に使用する金型の構造もより簡単なものにできる。 As described above, in the underground split cable for the underground cable according to the present embodiment, the connection between the divided pieces 2A and 2B has a simple structure, so that the divided pieces 2A and 2B can be easily connected to each other. In addition, the structure of the mold used during manufacturing can be simplified.

次に、他の実施の形態による地中ケーブル用自在割管について説明する。なお、上述した第１実施形態の構成要素と同一機能を有する構成要素には同一符号を付し、これらについては、説明が重複するので詳しい説明は省略する。 Next, a universal split tube for an underground cable according to another embodiment will be described. The constituent elements having the same functions as the constituent elements of the above-described first embodiment are designated by the same reference numerals, and the detailed description thereof will be omitted because the description is duplicated.

（第２実施形態）
図９（ａ）、（ｂ）及び図１０に示す第２実施形態による自在割管１Ａ（地中ケーブル用自在割管）は、上述した第１実施形態において連結部３(凹部３１又は凸部３２)の管軸Ｏ方向の位置を変えるとともに、差口２１と受口２２の係止構造を異なる形状としたものである。すなわち、本第２実施形態では、管軸Ｏ方向で受口２２寄りの連結部３が受口２２に位置している。 (Second embodiment)
9(a), (b) and FIG. 10 show a universal split tube 1A (a universal split tube for underground cable) according to the second embodiment, which is different from the first embodiment described above in that the connecting portion 3 (the concave portion 31 or the convex portion) is used. The position of the pipe 32 in the direction of the pipe axis O is changed, and the engaging structure of the inlet 21 and the receiving port 22 has different shapes. That is, in the second embodiment, the connecting portion 3 near the receiving port 22 in the tube axis O direction is located in the receiving port 22.

また、分割片２Ａ、２Ｂにおける差口２１の外周面２１ｂの頂部には、管軸Ｏ方向に沿って延びる凹溝２７が形成されている。受口２２の内周面２２ｃの頂部には、管軸Ｏ方向に沿って延びて差口２１の凹溝２７に係合する凸条２６が形成されている。
第２実施形態の自在割管１Ａの場合には、受口２２に開口部２４（図３（ａ）参照）が形成されていないので、受口２２に連結部３を設けても構造上の強度を確保することができる。
（第３実施形態）
次に、図１１（ａ）、（ｂ）及び図１２（ａ）、（ｂ）に示すように、第３実施形態による自在割管１Ｂ（地中ケーブル用自在割管）は、分割片２Ａ、２Ｂにおける一端部２ａに凹部３１又は凸部３２が設けられ、他端部２ｂにねじ締結によって連結されるヒンジ部３Ａが設けられている。その他の構成は、上述した第１実施形態と同様である。
ヒンジ部３Ａは、一方の分割片２Ａに設けられねじ孔が形成された第１ねじ固定片３３と、他方の分割片２Ｂに設けられねじ孔が形成された第２ねじ固定片３４と、第１ねじ固定片３３と第２ねじ固定片３４をねじ孔が同軸となるように重ねて配置した状態で締結されるボルト３５及びナット３６と、を備えている。 In addition, a concave groove 27 extending along the tube axis O direction is formed at the top of the outer peripheral surface 21b of the spout 21 in each of the divided pieces 2A and 2B. At the top of the inner peripheral surface 22c of the receiving port 22, there is formed a ridge 26 extending along the tube axis O direction and engaging with the concave groove 27 of the spout 21.
In the case of the universal split tube 1A of the second embodiment, since the opening 24 (see FIG. 3A) is not formed in the receiving port 22, even if the connecting part 3 is provided in the receiving port 22, it is structurally structural. The strength can be secured.
(Third Embodiment)
Next, as shown in FIGS. 11(a), (b) and FIGS. 12(a), (b), the universal split pipe 1B (flexible split pipe for underground cable) according to the third embodiment is divided into two pieces 2A. A concave portion 31 or a convex portion 32 is provided at one end portion 2a of 2B, and a hinge portion 3A is connected to the other end portion 2b by screw fastening. Other configurations are similar to those of the above-described first embodiment.
The hinge portion 3A includes a first screw fixing piece 33 having a screw hole formed in one of the divided pieces 2A, a second screw fixing piece 34 having a screw hole formed in the other divided piece 2B, and The first screw fixing piece 33 and the second screw fixing piece 34 are provided with a bolt 35 and a nut 36 that are fastened in a state where they are stacked and arranged so that the screw holes are coaxial with each other.

この場合には、ヒンジ部３Ａを介して各分割片２Ａ、２Ｂが開閉可能に設けられ、分割片２Ａ、２Ｂの一端部２ａ側の凹部３１と凸部３２を係合させることで連結作業を行うことができる。つまり、断面視で分割片２Ａ、２Ｂの片側の一端部２ａのみの係合で着脱作業を行えるので、施工性を向上させることができる。 In this case, the divided pieces 2A and 2B are provided so as to be openable and closable via the hinge portion 3A, and the connecting work is performed by engaging the concave portion 31 and the convex portion 32 on the one end portion 2a side of the divided pieces 2A and 2B. It can be carried out. That is, since the attaching/detaching work can be performed by engaging only the one end portion 2a on one side of the divided pieces 2A, 2B in a sectional view, the workability can be improved.

以上、本発明による地中ケーブル用自在割管の実施形態について説明したが、本発明は上記の実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。
例えば、上述した実施形態では、一対で分割された分割片２Ａ、２Ｂとなっているが、周方向に３つ以上に分割された分割片であってもかまわない。 Although the embodiment of the universal split tube for an underground cable according to the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the spirit of the present invention.
For example, in the above-described embodiment, the divided pieces 2A and 2B are divided into a pair, but the divided pieces may be divided into three or more pieces in the circumferential direction.

また、平面視で凹部の多角形状として四角形状の例を示したが、四角形状であることに制限されることはなく、例えば三角形状、六角形状など他の多角形状であってもかまわない。 In addition, although the quadrangular shape is shown as an example of the polygonal shape of the concave portion in a plan view, the shape is not limited to the quadrangular shape, and may be another polygonal shape such as a triangular shape or a hexagonal shape.

また、本実施形態では、凹部３１および凸部３２による連結部３が管軸Ｏ方向で２箇所に設けた構成としているが、３箇所以上であってもよいし、１箇所であってもかまわない。 Further, in the present embodiment, the connecting portion 3 including the concave portion 31 and the convex portion 32 is provided at two locations in the pipe axis O direction, but may be provided at three locations or more, or at one location. Absent.

また、本実施形態では、受口２２と差口２１を円筒状やラッパ状とした構成としているが、球形としてもよく、球形の受口２２の内部にやや小さい直径をした球形の差口２１が配置されることで折り曲げ可能とされてもよい。 Further, in the present embodiment, the receptacle 22 and the inlet 21 are configured to have a cylindrical shape or a trumpet shape, but may be spherical, and the spherical inlet 21 having a slightly smaller diameter inside the spherical inlet 22. May be foldable by disposing.

また、本発明の趣旨を逸脱しない範囲で、上記した実施形態における構成要素を周知の構成要素に置き換えることは適宜可能である。 Further, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention.

１、１Ａ、１Ｂ 自在割管（地中ケーブル用自在割管）
２、２’ 本体管
２Ａ、２Ｂ 分割片
３ 連結部
３Ａ ヒンジ部
２１ 差口
２２ 受口
２４ 開口部
２５ 係止爪部
３０ 突片
３１ 凹部
３２ 凸部
Ｏ 管軸 1, 1A, 1B Flexible split tube (Flexible split tube for underground cable)
2, 2'main body pipe 2A, 2B split piece 3 connecting part 3A hinge part 21 spout 22 receiving port 24 opening 25 locking claw 30 projecting piece 31 recess 32 convex O pipe shaft

Claims (6)

周方向に分割される本体管と、
該本体管の各分割片に形成される凹部および凸部と、を備え、
前記凹部は、平面視で多角形状に形成され、
前記凸部は、平面視で前記凹部の内周面に内接する球状に形成され、
複数の前記分割片のうち一の分割管に形成された前記凹部と、他の分割管に形成された前記凸部とが係合された状態で前記分割片同士が連結されていることを特徴とする地中ケーブル用自在割管。 A body tube that is divided in the circumferential direction,
A concave portion and a convex portion formed in each divided piece of the main body tube,
The recess is formed in a polygonal shape in a plan view,
The convex portion is formed in a spherical shape inscribed in the inner peripheral surface of the concave portion in a plan view,
Among the plurality of divided pieces, the divided pieces are connected to each other in a state where the concave portion formed in one divided pipe and the convex portion formed in another divided pipe are engaged with each other. Flexible tube for underground cable. 前記分割片における周方向の一端部に前記凹部が設けられ、他端部に前記凸部が設けられていることを特徴とする請求項１に記載の地中ケーブル用自在割管。 The universal split pipe for an underground cable according to claim 1, wherein the concave portion is provided at one end portion in the circumferential direction of the divided piece, and the convex portion is provided at the other end portion. 前記分割片における一端部に前記凹部又は前記凸部が設けられ、他端部にねじ締結によって連結されるヒンジ部が設けられていることを特徴とする請求項１に記載の地中ケーブル用自在割管。 The free-standing underground cable according to claim 1, wherein the concave portion or the convex portion is provided at one end of the divided piece, and a hinge portion connected by screw fastening is provided at the other end. Split tube. 前記凹部および凸部は、前記本体管の管軸に沿う管軸方向に複数設けられ、
同一の前記分割片において、前記凹部と前記凸部とが前記管軸方向に隣り合っていることを特徴とする請求項１乃至３のいずれか１項に記載の地中ケーブル用自在割管。 The concave portion and the convex portion are provided in plural in the tube axis direction along the tube axis of the main body tube,
In the same said division piece, the said recessed part and the said convex part adjoin in the said pipe axial direction, The universal split pipe for underground cables of any one of Claim 1 thru|or 3 characterized by the above-mentioned. 前記本体管は、管軸方向の一端に配された差口と、前記管軸方向の他端に配された受口と、を備え、
前記凹部および凸部は、前記管軸方向で前記差口および前記受口を避けた中央寄りに配置されていることを特徴とする請求項１乃至４のいずれか１項に記載の地中ケーブル用自在割管。 The main body tube includes an outlet arranged at one end in the pipe axis direction and a receiving opening arranged at the other end in the pipe axis direction,
The underground cable according to any one of claims 1 to 4, wherein the concave portion and the convex portion are arranged near the center in the tube axis direction so as to avoid the inlet and the receptacle. Flexible split tube. 前記受口には、別の前記本体管の前記差口を前記受口の内部に支持可能に構成された支持部が設けられ、
前記受口は、前記支持部から前記管軸方向に沿って離れるに従い漸次、拡径していることを特徴とする請求項５に記載の地中ケーブル用自在割管。 The receiving port is provided with a support portion configured to be able to support the outlet of another main body tube inside the receiving port,
The universal split tube for an underground cable according to claim 5, wherein the receiving opening gradually increases in diameter as the receiving opening is separated from the supporting portion along the tube axial direction.
JP2018214597A 2018-11-15 2018-11-15 Flexible split tube for underground cable Active JP7280688B2 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4324653Y1 (en) * 1965-11-17 1968-10-17
JPS63303296A (en) * 1987-06-01 1988-12-09 株式会社　安田製作所 Method of protective construction of underground buried line and universal split pipe used for said method
JPH0265031U (en) * 1988-11-07 1990-05-16
JPH0265032U (en) * 1988-11-07 1990-05-16
JPH0377226U (en) * 1989-11-29 1991-08-02
JP2004248367A (en) * 2003-02-12 2004-09-02 Yazaki Corp Harness sheathing member and harness cabling structure
JP2014233119A (en) * 2013-05-28 2014-12-11 関西電力株式会社 Protective tube and lock member

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4324653B2 (en) 2005-05-26 2009-09-02 本多電子株式会社 Ultrasonic cleaning equipment

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4324653Y1 (en) * 1965-11-17 1968-10-17
JPS63303296A (en) * 1987-06-01 1988-12-09 株式会社　安田製作所 Method of protective construction of underground buried line and universal split pipe used for said method
JPH0265031U (en) * 1988-11-07 1990-05-16
JPH0265032U (en) * 1988-11-07 1990-05-16
JPH0377226U (en) * 1989-11-29 1991-08-02
JP2004248367A (en) * 2003-02-12 2004-09-02 Yazaki Corp Harness sheathing member and harness cabling structure
JP2014233119A (en) * 2013-05-28 2014-12-11 関西電力株式会社 Protective tube and lock member

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