JP2021046874A - Clamp member - Google Patents

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JP2021046874A
JP2021046874A JP2019168307A JP2019168307A JP2021046874A JP 2021046874 A JP2021046874 A JP 2021046874A JP 2019168307 A JP2019168307 A JP 2019168307A JP 2019168307 A JP2019168307 A JP 2019168307A JP 2021046874 A JP2021046874 A JP 2021046874A
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engaging
resin pipe
tightening band
engaging portion
clamp member
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JP7368988B2 (en
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水川 賢司
Kenji Mizukawa
賢司 水川
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Sekisui Chemical Co Ltd
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Sekisui Chemical Co Ltd
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Abstract

To improve workability in a construction work for connecting a resin pipe to an electrofusion joint.SOLUTION: A clamp member 1 is a resin clamp member 1 for fixing a resin pipe made of a thermoplastic resin, and an electrofusion joint to which the resin pipe is connected by heat fusion. The clamp member includes: a fastening band portion 10 of which a diameter can be reduced to hold the resin pipe in a state of inserting the resin pipe therein; a pair of engagement portions 11A, 11B keeping a diameter reduction state of the fastening band portion 10 by being engaged with each other in a circumferential direction going around a center axis O of the fastening band portion 10; and a holding portion 12 connected to the fastening band portion 10, and holding a power supply terminal of the electrofusion joint. The first engagement portion 11A of the pair of engagement portions 11A, 11B is provided with a projection member 25 projecting toward the second engagement portion 11B and indicating a degree of diameter reduction states of the pair of engagement portions 11A, 11B.SELECTED DRAWING: Figure 2

Description

本発明は、クランプ部材に関する。 The present invention relates to a clamp member.

従来、熱可塑性樹脂製の樹脂管が熱融着により連結される電気融着継手が知られている。電気融着継手は筒状をなしている。電気融着継手の内部に樹脂管を挿通した状態で給電端子に電流を流すことで、電気融着継手の内部に設けられた電熱線が発熱し、樹脂管の外周面が溶融されて、電気融着継手の内周面と融着される。 Conventionally, an electric fusion joint in which a resin tube made of a thermoplastic resin is connected by heat fusion is known. The electric fusion joint has a tubular shape. By passing an electric current through the power supply terminal with the resin pipe inserted inside the electric fusion joint, the heating wire provided inside the electric fusion joint generates heat, and the outer peripheral surface of the resin pipe is melted to generate electricity. It is fused with the inner peripheral surface of the fusion splicer.

このような電気融着継手の熱融着による連結作業では、一定の時間がかかる熱融着の中に、電気融着継手と樹脂管とが位置ずれを起こすことを防ぐために、例えば下記特許文献1に示すようなクランプ部材が用いられる。電気融着継手および樹脂管に許容される位置ずれ量としては、例えば中心軸線同士の傾きが3°以下であることが求められる。また、電気融着継手からの樹脂管の抜け量が1mm以内であることが求められる。
このクランプ部材は金属材料により形成され、熱融着における冷却中に、電気融着継手における一対の給電端子、および電気融着継手に接続される一対の樹脂管を、一体に保持した状態を維持する。
In such a connection work by heat fusion of the electric fusion joint, in order to prevent the electric fusion joint and the resin pipe from being misaligned during the heat fusion that takes a certain period of time, for example, the following patent documents A clamp member as shown in 1 is used. As the amount of misalignment allowed for the electric fusion joint and the resin pipe, for example, the inclination between the central axes is required to be 3 ° or less. Further, the amount of the resin pipe coming out of the electric fusion joint is required to be within 1 mm.
This clamp member is formed of a metal material and maintains a state in which a pair of power supply terminals in the electric fusion joint and a pair of resin tubes connected to the electric fusion joint are integrally held during cooling in the heat fusion joint. To do.

しかしながら、このクランプ部材では、金属材料により形成されているので、クランプ部材が高価になり、同時に複数のクランプ部材を手配するのに費用がかさむ。このため、施工作業の費用を抑えながら、熱融着における冷却中に、他の電気融着継手に樹脂管を接続することができず、作業効率が悪かった。 However, since this clamp member is made of a metal material, the clamp member becomes expensive, and it is costly to arrange a plurality of clamp members at the same time. For this reason, the resin pipe cannot be connected to another electric fusion joint during cooling in the heat fusion while suppressing the cost of the construction work, resulting in poor work efficiency.

特開2007−155064号公報Japanese Unexamined Patent Publication No. 2007-155064

しかしながら、前記従来のクランプ部材では、金属材料により形成されているので、クランプ部材が高価になり、同時に複数のクランプ部材を手配するのに費用がかさむ。このため、施工作業の費用を抑えながら、熱融着における冷却中に、他の電気融着継手に樹脂管を接続することができず、作業効率が悪かった。 However, since the conventional clamp member is made of a metal material, the clamp member becomes expensive, and it is costly to arrange a plurality of clamp members at the same time. For this reason, the resin pipe cannot be connected to another electric fusion joint during cooling in the heat fusion while suppressing the cost of the construction work, resulting in poor work efficiency.

本発明は、前述した事情に鑑みてなされたものであって、安価な構成として費用を抑えながら、電気融着継手に樹脂管を接続する施工作業を、複数の箇所で効率的に行うことができるクランプ部材を提供することを目的とする。 The present invention has been made in view of the above-mentioned circumstances, and it is possible to efficiently perform the construction work of connecting the resin pipe to the electric fusion joint at a plurality of places while suppressing the cost as an inexpensive configuration. It is an object of the present invention to provide a clamp member which can be used.

前記課題を解決するために、本発明は以下の手段を提案している。
本発明に係るクランプ部材は、熱可塑性樹脂製の樹脂管と、前記樹脂管が熱融着により接続される電気融着継手と、を固定する樹脂製のクランプ部材であって、内側に前記樹脂管が挿入された状態で、前記樹脂管を保持するように縮径可能な締付帯部と、前記締付帯部の中心軸線回りに周回する周方向に互いに係合することで、前記締付帯部の縮径状態を維持する一対の係合部と、前記締付帯部に連結され、前記電気融着継手の給電端子を保持する保持部と、を備え、前記一対の係合部のうちの第1係合部には、第2係合部に向けて突出し、前記一対の係合部同士の縮径状態の程度を示す突起部材が形成されている。
In order to solve the above problems, the present invention proposes the following means.
The clamp member according to the present invention is a resin clamp member for fixing a resin pipe made of a thermoplastic resin and an electric fusion joint to which the resin pipe is connected by heat fusion, and the resin inside. With the tube inserted, the tightening band portion that can be reduced in diameter to hold the resin tube and the tightening band portion are engaged with each other in the circumferential direction that orbits around the central axis of the tightening band portion. A pair of engaging portions that maintain the reduced diameter state of the above, and a holding portion that is connected to the tightening band portion and holds a power supply terminal of the electric fusion joint, and is the first of the pair of engaging portions. The one engaging portion is formed with a protruding member that projects toward the second engaging portion and indicates the degree of diameter reduction between the pair of engaging portions.

この発明では、樹脂管を熱融着により電気融着継手に接続、固定する際に、クランプ部材における保持部が、電気融着継手の給電端子を保持した状態にしたうえで、樹脂管をクランプ部材の締付帯部の内側に挿入しながら、電気融着継手の開口部に挿入する。その後、クランプ部材における一対の係合部同士を互いに係合させることで、一対の係合部同士が、互いに締付帯部が拡径する方向に相対変位するのを規制することができる。そしてこのように、クランプ部材により、電気融着継手と樹脂管とを仮固定した状態で、給電端子に電流を流すことで、電気融着継手に樹脂管が熱融着される。 In the present invention, when the resin pipe is connected to and fixed to the electric fusion joint by heat fusion, the holding portion of the clamp member holds the power supply terminal of the electric fusion joint, and then the resin pipe is clamped. It is inserted into the opening of the electric fusion joint while being inserted inside the tightening band of the member. After that, by engaging the pair of engaging portions in the clamp member with each other, it is possible to prevent the pair of engaging portions from being displaced relative to each other in the direction in which the tightening band portions expand in diameter. Then, in this way, the resin pipe is heat-sealed to the electric fusion joint by passing an electric current through the power feeding terminal in a state where the electric fusion joint and the resin pipe are temporarily fixed by the clamp member.

ここで、本発明ではクランプ部材が樹脂製であるため、安価な構成とすることができる。このため、同時に複数のクランプ部材を手配したとしても費用がかさむことが抑えられ、電気融着継手に樹脂管を接続する施工作業を、複数の箇所で効率的に行うことができる。
また、内側に樹脂管が挿入された締付帯部の縮径状態を保持する一対の係合部を備えているので、締付帯部により確実に樹脂管を保持することができる。
また、電気融着継手の給電端子を保持する保持部が締付帯部に連結されているので、電気融着継手と別体により構成されたクランプ部材により、電気融着継手を確実に保持することができる。
Here, in the present invention, since the clamp member is made of resin, it can be inexpensively configured. Therefore, even if a plurality of clamp members are arranged at the same time, the cost is suppressed, and the construction work of connecting the resin pipe to the electric fusion joint can be efficiently performed at a plurality of locations.
Further, since the pair of engaging portions for holding the reduced diameter state of the tightening band portion in which the resin tube is inserted are provided inside, the resin tube can be reliably held by the tightening band portion.
Further, since the holding portion for holding the power supply terminal of the electric fusion joint is connected to the tightening band portion, the electric fusion joint must be securely held by the clamp member formed separately from the electric fusion joint. Can be done.

また、本発明では、一対の係合部のうちの第1係合部に突起部材が形成されている。突起部材は、第2係合部に向けて突出され、一対の係合部同士による締付帯部の縮径状態の程度を示す。よって、締付帯部の縮径状態を、突起部材を目視することにより確認できる。すなわち、施工現場において、一対の係合部の間隔(距離)を測定する手間を省くことができる。これにより、電気融着継手に樹脂管を接続する施工作業の施工性を高めることができる。 Further, in the present invention, a protrusion member is formed on the first engaging portion of the pair of engaging portions. The protruding member is projected toward the second engaging portion, and indicates the degree of diameter reduction of the tightening band portion by the pair of engaging portions. Therefore, the reduced diameter state of the tightening band portion can be confirmed by visually observing the protruding member. That is, it is possible to save the trouble of measuring the distance (distance) between the pair of engaging portions at the construction site. As a result, the workability of the construction work of connecting the resin pipe to the electric fusion joint can be improved.

また、前記突起部材は、前記一対の係合部同士が前記中心軸線に沿う軸方向に相対的にずれることを阻止してもよい。 Further, the protrusion member may prevent the pair of engaging portions from being relatively displaced in the axial direction along the central axis.

この場合には、一対の係合部(すなわち、第1係合部および第2係合部)が、軸方向へ相対的にずれることを突起部材で阻止するようにした。具体的には、一対の係合部同士を係合させる際に、第1係合部の突起部材を第2係合部に接触させる。よって、第1係合部および第2係合部が軸方向へ相対的にずれて、第1係合部と第2係合部との係合面積が小さくなることを突起部材で阻止できる。これにより、クランプ部材の締付帯部により樹脂管を安定してクランプできる。 In this case, the protrusion member prevents the pair of engaging portions (that is, the first engaging portion and the second engaging portion) from being relatively displaced in the axial direction. Specifically, when engaging the pair of engaging portions with each other, the protruding member of the first engaging portion is brought into contact with the second engaging portion. Therefore, the protrusion member can prevent the first engaging portion and the second engaging portion from being relatively displaced in the axial direction and the engaging area between the first engaging portion and the second engaging portion becoming smaller. As a result, the resin tube can be stably clamped by the tightening band portion of the clamp member.

また、前記突起部材は、前記第2係合部に対して前記中心軸線に沿う軸方向にずらされていてもよい。 Further, the protruding member may be displaced in the axial direction along the central axis with respect to the second engaging portion.

この場合には、突起部材を第2係合部に対して軸方向にずらすようにした。よって、第1係合部と第2係合部とを係合させた状態において、突起部材の周方向の端縁と、第2係合部の周方向の端縁とを目視しやすくできる。これにより、締付帯部の縮径状態の程度を確認する際に、突起部材の周方向の端縁と、第2係合部の周方向の端縁とを目視で容易に比較できる。これにより、電気融着継手に樹脂管を接続する施工作業の施工性を一層高めることができる。 In this case, the protruding member is displaced in the axial direction with respect to the second engaging portion. Therefore, in a state where the first engaging portion and the second engaging portion are engaged, the circumferential end edge of the protrusion member and the circumferential end edge of the second engaging portion can be easily visually recognized. Thereby, when confirming the degree of the reduced diameter state of the tightening band portion, the peripheral edge of the protruding member in the circumferential direction and the peripheral edge of the second engaging portion in the circumferential direction can be easily visually compared. As a result, the workability of the construction work of connecting the resin pipe to the electric fusion joint can be further improved.

本発明によれば、安価な構成として費用を抑えながら、電気融着継手に樹脂管を接続する施工作業を、複数の箇所で効率的に行うことができる。 According to the present invention, it is possible to efficiently perform the construction work of connecting the resin pipe to the electric fusion joint at a plurality of places while suppressing the cost as an inexpensive configuration.

本発明の一実施形態に係るクランプ付き電気融着継手の一部断面正面図である。It is a partial cross-sectional front view of the electric fusion joint with a clamp which concerns on one Embodiment of this invention. 図1に示すクランプ部材の斜視図である。It is a perspective view of the clamp member shown in FIG. 図1に示すクランプ部材を軸方向から見た側面図である。FIG. 5 is a side view of the clamp member shown in FIG. 1 as viewed from the axial direction. 図1に示すクランプ部材を樹脂管に取り付けて電気融着継手に連結した斜視図である。FIG. 5 is a perspective view in which the clamp member shown in FIG. 1 is attached to a resin pipe and connected to an electric fusion joint. 図1に示すクランプ部材で突起部材が第2係合部に対して面一に配置されるまで樹脂管をかしめた状態を示す正面図である。It is a front view which shows the state which crimped the resin tube until the protrusion member is arranged flush with respect to the 2nd engaging part in the clamp member shown in FIG. 図1に示すクランプ部材で突起部材が第2係合部に対して補強リブ側に配置されるまで樹脂管をかしめた状態を示す正面図である。It is a front view which shows the state which crimped the resin tube until the protrusion member is arranged on the reinforcing rib side with respect to the 2nd engaging part in the clamp member shown in FIG. 図1に示すクランプ部材で突起部材が第2係合部に対して操作部側に配置されるまで樹脂管をかしめた状態を示す正面図である。It is a front view which shows the state which crimped the resin tube until the protrusion member is arranged on the operation part side with respect to the 2nd engaging part in the clamp member shown in FIG.

以下、図面を参照し、本発明の一実施形態に係るクランプ部材1について説明する。
図1に示すように、クランプ部材付き電気融着継手3は、電気融着継手2とクランプ部材1とを備えている。電気融着継手2の両側の開口端部に、2つのクランプ部材1が各別に設けられている。
Hereinafter, the clamp member 1 according to the embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the electric fusion joint 3 with a clamp member includes an electric fusion joint 2 and a clamp member 1. Two clamp members 1 are separately provided at the open ends on both sides of the electric fusion joint 2.

電気融着継手2には、熱可塑性樹脂製の樹脂管100が熱融着により接続される。
クランプ部材1は、樹脂管100が熱融着により電気融着継手2に接続、固定される際に、樹脂管100と電気融着継手2とを仮固定する樹脂製の部材である。
ここで、樹脂管100と電気融着継手2との仮固定とは、熱融着の作業中に、樹脂管100の中心軸線に対して電気融着継手2の中心軸線が傾いたり、樹脂管100が電気融着継手2の開口部から抜けたりするのを防ぐことを意味する。
A resin pipe 100 made of a thermoplastic resin is connected to the electric fusion joint 2 by heat fusion.
The clamp member 1 is a resin member that temporarily fixes the resin pipe 100 and the electric fusion joint 2 when the resin pipe 100 is connected to and fixed to the electric fusion joint 2 by heat fusion.
Here, the temporary fixing of the resin pipe 100 and the electric fusion joint 2 means that the central axis of the electric fusion joint 2 is tilted with respect to the central axis of the resin pipe 100 or the resin pipe is temporarily fixed during the heat fusion work. It means that 100 is prevented from coming off from the opening of the electric fusion joint 2.

電気融着継手2は筒状をなしている。電気融着継手2の周壁20のうち、内周面の近傍には、電熱線21が樹脂管100毎に各別に埋設されている。また、電気融着継手2の周壁20のうち、各開口端部の近傍には、電熱線21と導通された給電端子22が各別に設けられている。給電端子22から、電熱線21に電流を流すことで、電熱線21を発熱させて、電気融着継手2の内側に挿入された樹脂管100を、電気融着継手2の内面に熱融着することができる。
以下の説明において、電気融着継手2の中心軸線Oに沿う方向を軸方向という。また、軸方向から見た平面視で中心軸線Oに交差する方向を径方向といい、中心軸線O回りに周回する方向を周方向という。
The electric fusion joint 2 has a tubular shape. Of the peripheral wall 20 of the electric fusion joint 2, heating wires 21 are separately embedded for each resin pipe 100 in the vicinity of the inner peripheral surface. Further, in the peripheral wall 20 of the electric fusion joint 2, near each opening end, a power feeding terminal 22 conducting electricity with the heating wire 21 is separately provided. By passing an electric current from the power supply terminal 22 to the heating wire 21, the heating wire 21 is heated, and the resin pipe 100 inserted inside the electric fusion joint 2 is heat-sealed to the inner surface of the electric fusion joint 2. can do.
In the following description, the direction along the central axis O of the electric fusion joint 2 is referred to as an axial direction. Further, the direction that intersects the central axis O in a plan view from the axial direction is referred to as a radial direction, and the direction that orbits around the central axis O is referred to as a circumferential direction.

図1および図2に示すように、クランプ部材1は、内側に樹脂管100が挿入された状態で、樹脂管100を保持するように縮径可能な締付帯部10を備えている。
図3に示すように、締付帯部10は、軸方向から見た平面視で、周方向の一部が分断されたC字状をなしている。締付帯部10のうち、周方向に分断された部分の標準状態における大きさは、中心軸線Oを中心とする中心角θ(°)が式(1)を満たす大きさであることが好ましい。
As shown in FIGS. 1 and 2, the clamp member 1 includes a tightening band portion 10 whose diameter can be reduced so as to hold the resin pipe 100 in a state where the resin pipe 100 is inserted inside.
As shown in FIG. 3, the tightening band portion 10 has a C-shape in which a part of the circumferential direction is divided in a plan view seen from the axial direction. The size of the portion of the tightening band portion 10 divided in the circumferential direction in the standard state is preferably such that the central angle θ (°) about the central axis O satisfies the equation (1).

θ>360−360×D0/D1…(1) θ> 360-360 × D0 / D1 ... (1)

ここで、D0:樹脂管100の外径、D1:締付帯部10の内径を指す。また、締付帯部10の標準状態とは、締付帯部10に外力を加えていない状態を指す。すなわち、クランプ部材1は樹脂製であり、外力を加えると弾性変形し、その外力を解除すると復元変形する。標準状態の締付帯部10は、外力が加えられていない状態の締付帯部10であり、復元変形しきっている状態の締付帯部10であるとも言える。 Here, D0: refers to the outer diameter of the resin pipe 100, and D1: refers to the inner diameter of the tightening band portion 10. Further, the standard state of the tightening band portion 10 refers to a state in which no external force is applied to the tightening band portion 10. That is, the clamp member 1 is made of resin and elastically deforms when an external force is applied, and is restored and deformed when the external force is released. It can be said that the tightening band portion 10 in the standard state is a tightening band portion 10 in a state in which no external force is applied, and is a tightening band portion 10 in a state in which the restoration and deformation are completely completed.

またクランプ部材1は、図2および図3に示すように、一対の係合部11A,11Bと、保持部12と、を備えている。一対の係合部11A,11Bは、周方向に互いに係合することで、締付帯部10の縮径状態を維持する。保持部12は、締付帯部10に連結され、電気融着継手2の給電端子22(図1参照)を保持する。
一対の係合部11A,11B、および保持部12は、合成樹脂材料の射出成形等により、締付帯部10と一体に形成されている。なお、一対の係合部11A,11B、および保持部12を、締付帯部10と別体に形成してもよい。
Further, as shown in FIGS. 2 and 3, the clamp member 1 includes a pair of engaging portions 11A and 11B and a holding portion 12. The pair of engaging portions 11A and 11B engage with each other in the circumferential direction to maintain the reduced diameter state of the tightening band portion 10. The holding portion 12 is connected to the tightening band portion 10 and holds the power feeding terminal 22 (see FIG. 1) of the electric fusion joint 2.
The pair of engaging portions 11A and 11B and the holding portion 12 are integrally formed with the tightening band portion 10 by injection molding or the like of a synthetic resin material. The pair of engaging portions 11A and 11B and the holding portion 12 may be formed separately from the tightening band portion 10.

図3に示すように、一対の係合部11A,11Bは、軸方向から見た平面視で、締付帯部10における周方向の両端部に、各別に形成されている。一対の係合部11A,11Bは、互いに周方向に沿って延びている。
一対の係合部11A,11Bは、第1係合部11Aと、締付帯部10が縮径した状態で、第1係合部11Aよりも径方向の外側に位置する第2係合部11Bと、を備えている。第2係合部11Bは、締付帯部10の周方向に沿って第1係合部11A方向へ向けて円弧状に延びて先端面11Cで仕切られている。
As shown in FIG. 3, the pair of engaging portions 11A and 11B are separately formed at both ends in the circumferential direction of the tightening band portion 10 in a plan view seen from the axial direction. The pair of engaging portions 11A and 11B extend along the circumferential direction of each other.
The pair of engaging portions 11A and 11B have a second engaging portion 11B located outside the first engaging portion 11A in the radial direction in a state where the first engaging portion 11A and the tightening band portion 10 have a reduced diameter. And have. The second engaging portion 11B extends in an arc shape toward the first engaging portion 11A along the circumferential direction of the tightening band portion 10 and is partitioned by the tip surface 11C.

締付帯部10における第2係合部11Bが形成された端部には、第2係合部11Bよりも径方向の内側に位置し、かつ周方向に延びる案内部10Aが形成されている。案内部10Aは、締付帯部10の端部そのものによって形成されている。
案内部10Aは、第1係合部11Aと第2係合部11Bとが、周方向に互いに係合する際に、第1係合部11Aに対して径方向の内側に位置し、第1係合部11Aの周方向の移動を案内する。すなわち、第1係合部11Aは、第2係合部11Bと案内部10Aとの径方向の間の空間に挿入される。
At the end of the tightening band portion 10 on which the second engaging portion 11B is formed, a guide portion 10A located inside the second engaging portion 11B in the radial direction and extending in the circumferential direction is formed. The guide portion 10A is formed by the end portion itself of the tightening band portion 10.
The guide portion 10A is located on the inner side in the radial direction with respect to the first engaging portion 11A when the first engaging portion 11A and the second engaging portion 11B engage with each other in the circumferential direction, and the first It guides the movement of the engaging portion 11A in the circumferential direction. That is, the first engaging portion 11A is inserted into the space between the second engaging portion 11B and the guide portion 10A in the radial direction.

第1係合部11Aには、第1係合歯13Aが形成されている。第1係合歯13Aは、第1係合部11Aにおける径方向の外側を向く外側面に形成されている。第2係合部11Bには、第2係合歯13Bが形成されている。第2係合歯13Bは、第2係合部11Bにおける径方向の内側を向く内側面に形成されている。第1係合部11Aにおいて、第1係合歯13Aが形成されている部分の周方向の長さは、第2係合部11Bにおいて、第2係合歯13Bが形成されている部分の周方向の長さと同等となっている。
第1係合歯13Aおよび第2係合歯13Bは、締付帯部10が縮径する方向の互いの相対変位を許容し、かつ締付帯部10が拡径する方向の互いの相対変位を規制する。具体的には、各係合歯13A,13Bは、軸方向から見た平面視で、三角形状(鋸歯状)をなし、周方向に連続して形成されている。
The first engaging tooth 13A is formed in the first engaging portion 11A. The first engaging tooth 13A is formed on the outer surface of the first engaging portion 11A facing outward in the radial direction. A second engaging tooth 13B is formed on the second engaging portion 11B. The second engaging tooth 13B is formed on the inner side surface of the second engaging portion 11B facing inward in the radial direction. The circumferential length of the portion of the first engaging portion 11A where the first engaging tooth 13A is formed is the circumference of the portion of the second engaging portion 11B where the second engaging tooth 13B is formed. It is equivalent to the length in the direction.
The first engaging tooth 13A and the second engaging tooth 13B allow the relative displacement of the tightening band portion 10 in the direction of contraction, and regulate the relative displacement of the tightening band portion 10 in the direction of expansion. To do. Specifically, the engaging teeth 13A and 13B have a triangular shape (sawtooth shape) in a plan view seen from the axial direction, and are formed continuously in the circumferential direction.

また本実施形態では、第1係合部11Aには、径方向の外側に向けて突出する操作部14が設けられている。操作部14は、第1係合部11Aの基端部に形成されている。図示の例では、操作部14と第2係合部11Bとを、例えばペンチ等の工具で周方向に締める(かしめる)ことができる。これにより、締付帯部10を弾性変形させて縮径させ、係合歯13A、13B同士を係合させることができる。 Further, in the present embodiment, the first engaging portion 11A is provided with an operating portion 14 that projects outward in the radial direction. The operating portion 14 is formed at the base end portion of the first engaging portion 11A. In the illustrated example, the operating portion 14 and the second engaging portion 11B can be tightened (caulked) in the circumferential direction with a tool such as pliers. As a result, the tightening band portion 10 can be elastically deformed to reduce the diameter, and the engaging teeth 13A and 13B can be engaged with each other.

また本実施形態では、図2および図3に示すように、締付帯部10の内周面には、径方向の内側に向けて突出する突起部15が形成されている。突起部15は、周方向に直交する断面視で三角形状をなしている。突起部15は、締付帯部10の内周面における軸方向の中央部に形成されている。突起部15は、締付帯部10の内周面に全周にわたって連続して延びている。なお、このような態様に限られず、突起部15は、締付帯部10の内周面に、周方向に間隔をあけて離散的に設けられてもよい。さらに突起部15はなくてもよい。 Further, in the present embodiment, as shown in FIGS. 2 and 3, a protrusion 15 projecting inward in the radial direction is formed on the inner peripheral surface of the tightening band portion 10. The protrusion 15 has a triangular shape in a cross-sectional view orthogonal to the circumferential direction. The protrusion 15 is formed at the central portion in the axial direction on the inner peripheral surface of the tightening band portion 10. The protrusion 15 extends continuously over the entire circumference to the inner peripheral surface of the tightening band 10. In addition, the present invention is not limited to such an aspect, and the protrusions 15 may be discretely provided on the inner peripheral surface of the tightening band portion 10 at intervals in the circumferential direction. Further, the protrusion 15 may be omitted.

また本実施形態では、保持部12は、締付帯部10における、軸方向の一方側の端部に連結されている。保持部12は、径方向に延びる連結片12Aと、連結片12Aに連結され、電気融着継手2の給電端子22(図1参照)を保持する保持片12Bと、を備えている。連結片12A、および保持片12Bは一体に形成されている。
連結片12Aは、表裏面が軸方向を向く板状部材であり、図3に示すように、軸方向から見た平面視で径方向に延びる略矩形状を呈している。
Further, in the present embodiment, the holding portion 12 is connected to one end portion in the axial direction of the tightening band portion 10. The holding portion 12 includes a connecting piece 12A extending in the radial direction and a holding piece 12B which is connected to the connecting piece 12A and holds the power feeding terminal 22 (see FIG. 1) of the electric fusion joint 2. The connecting piece 12A and the holding piece 12B are integrally formed.
The connecting piece 12A is a plate-shaped member whose front and back surfaces face in the axial direction, and as shown in FIG. 3, has a substantially rectangular shape extending in the radial direction in a plan view seen from the axial direction.

図1および図2に示すように、連結片12Aは、電気融着継手2の開口端縁に当接する。連結片12Aにおける軸方向の大きさL1は、3mm以上である。図示の例では、連結片12Aにおける軸方向の大きさL1は3mmとなっている。
連結片12Aの表裏面のうち、締付帯部10側を向く外面には、補強リブ16が接続されている。補強リブ16は、第2係合部11Bと、連結片12Aの外面と、を接続し、連結片12Aが軸方向に変形するのを抑制している。また、第2係合部11Bと保持部12との間には、隙間CLが形成されている。
As shown in FIGS. 1 and 2, the connecting piece 12A abuts on the open end edge of the electric fusion joint 2. The axial size L1 of the connecting piece 12A is 3 mm or more. In the illustrated example, the axial size L1 of the connecting piece 12A is 3 mm.
A reinforcing rib 16 is connected to the outer surface of the front and back surfaces of the connecting piece 12A facing the tightening band portion 10. The reinforcing rib 16 connects the second engaging portion 11B and the outer surface of the connecting piece 12A, and suppresses the connecting piece 12A from being deformed in the axial direction. Further, a gap CL is formed between the second engaging portion 11B and the holding portion 12.

図2、図3に示すように、隙間CLのうち、周方向において第1係合部11A(操作部14)の反対側の端部が、補強リブ16で閉じられている。また、隙間CLのうち、周方向において第1係合部11Aの端部に、開口部が形成されている。操作部14は、軸方向から見た平面視で、後述する挿通孔12Cの中心から90度以内にある。なお図示の例では、第1係合部11Aおよび第2係合部11Bも、軸方向から見た平面視で、後述する挿通孔12Cの中心から90度以内にある。 As shown in FIGS. 2 and 3, the end of the gap CL on the opposite side of the first engaging portion 11A (operating portion 14) in the circumferential direction is closed by the reinforcing rib 16. Further, in the gap CL, an opening is formed at the end of the first engaging portion 11A in the circumferential direction. The operation unit 14 is within 90 degrees from the center of the insertion hole 12C, which will be described later, in a plan view seen from the axial direction. In the illustrated example, the first engaging portion 11A and the second engaging portion 11B are also within 90 degrees from the center of the insertion hole 12C, which will be described later, in a plan view from the axial direction.

図1、図2に示すように、保持片12Bは、表裏面が径方向を向く板状部材である。連結片12A、および保持片12Bそれぞれにおける周方向の大きさは、互いに同等となっている。保持片12Bは、軸方向から見た平面視で、周方向の中央部が径方向の外側に向けて突出するように湾曲している。保持片12Bの表裏面のうち、径方向の内側を向く内面は、電気融着継手2の外周面に当接する。
保持片12Bには、保持片12Bを径方向に貫く挿通孔12Cが形成されている。挿通孔12C内に電気融着継手2の給電端子22が挿通された状態で保持される。
As shown in FIGS. 1 and 2, the holding piece 12B is a plate-shaped member whose front and back surfaces face in the radial direction. The sizes of the connecting piece 12A and the holding piece 12B in the circumferential direction are the same as each other. The holding piece 12B is curved so that the central portion in the circumferential direction protrudes outward in the radial direction in a plan view seen from the axial direction. Of the front and back surfaces of the holding piece 12B, the inner surface facing inward in the radial direction abuts on the outer peripheral surface of the electric fusion joint 2.
The holding piece 12B is formed with an insertion hole 12C that penetrates the holding piece 12B in the radial direction. The power supply terminal 22 of the electric fusion joint 2 is held in the insertion hole 12C in a state of being inserted.

また本実施形態では、締付帯部10における軸方向の端部には、軸方向に向けて突出する突出片17が形成されている。突出片17は、締付帯部10から、軸方向に沿って保持部12と同一方向に突出している。突出片17は、中心軸線Oを径方向に挟んで、保持部12の反対側に位置している。図示の例では、突出片17は、連結片12Aにおける周方向の中央部と、中心軸線Oを径方向に挟む位置に配置されている。 Further, in the present embodiment, a protruding piece 17 projecting in the axial direction is formed at the end portion of the tightening band portion 10 in the axial direction. The projecting piece 17 projects from the tightening band portion 10 in the same direction as the holding portion 12 along the axial direction. The protruding piece 17 is located on the opposite side of the holding portion 12 with the central axis O sandwiched in the radial direction. In the illustrated example, the protruding piece 17 is arranged at a position that sandwiches the central portion of the connecting piece 12A in the circumferential direction and the central axis O in the radial direction.

突出片17の径方向の大きさは、締付帯部10の径方向の大きさと同等となっている。また、突出片17の軸方向の大きさL2は、連結片12Aにおける軸方向の大きさL1と同じ3mmとなっている。突出片17は、締付帯部10の側面(軸方向の端部)に、周方向に間隔をあけて離散的に設けられてもよい。 The radial size of the protruding piece 17 is the same as the radial size of the tightening band portion 10. Further, the axial size L2 of the protruding piece 17 is 3 mm, which is the same as the axial size L1 of the connecting piece 12A. The projecting pieces 17 may be discretely provided on the side surface (end portion in the axial direction) of the tightening band portion 10 at intervals in the circumferential direction.

また本実施形態では、図2から図4に示すように、第1係合部11Aにおける保持部12側の側面に、突起部材25が一体的に形成されている。突起部材25は、第1係合部11Aのうち保持部12側の側面において、周方向の中央部から先端部に至るまで設けられている。突起部材25は、第1係合部11Aの側面から径方向の外側に向けて突出している。 Further, in the present embodiment, as shown in FIGS. 2 to 4, the protrusion member 25 is integrally formed on the side surface of the first engaging portion 11A on the holding portion 12 side. The protrusion member 25 is provided on the side surface of the first engaging portion 11A on the holding portion 12 side from the central portion to the tip portion in the circumferential direction. The protruding member 25 projects radially outward from the side surface of the first engaging portion 11A.

突起部材25は、第2係合部11Bに対して軸方向において隙間CLの側にずらされて配置されている。隙間CLは、前述したように、第2係合部11Bと保持部12の連結片12Aとの間に形成され、突起部材25の側に開口部が形成されている。隙間CLの周方向の開口部に対して対向する位置に突起部材25が設置されている。突起部材25の厚みは、軸方向において隙間CLの幅より小さく形成されている。また、突起部材25の長さは、周方向において隙間CLの長さより小さく形成されている。よって、締付帯部10を縮径させて係合歯13A、13B同士を係合させた状態において、突起部材25を隙間CLの内部に開口部から進入させることができる。 The protrusion member 25 is arranged so as to be displaced toward the gap CL in the axial direction with respect to the second engaging portion 11B. As described above, the gap CL is formed between the second engaging portion 11B and the connecting piece 12A of the holding portion 12, and an opening is formed on the side of the protrusion member 25. The protrusion member 25 is installed at a position facing the opening in the circumferential direction of the gap CL. The thickness of the protrusion member 25 is formed to be smaller than the width of the gap CL in the axial direction. Further, the length of the protrusion member 25 is formed to be smaller than the length of the gap CL in the circumferential direction. Therefore, in a state where the tightening band portion 10 is reduced in diameter and the engaging teeth 13A and 13B are engaged with each other, the protrusion member 25 can be made to enter the inside of the gap CL from the opening.

図示の例では、突起部材25は、表裏面が軸方向を向く板状部材である。図3に示すように、突起部材25は、軸方向から見た平面視で、第1側辺25aと、第2側辺25bと、内辺25cと、外辺25dと、を有する略矩形状である。
第1側辺25aは、第1係合部11Aの保持部12側の側面のうち、周方向の中央に配置されている。第1側辺25aは、径方向に延びている。第2側辺25bは、第1係合部11Aの保持部12側の側面のうち、周方向の先端に配置されている。第2側辺25bは、径方向に延びている。内辺25cは、第1係合部11Aの内周面に沿って第1側辺25aから第2側辺25bまで延びている。外辺25dは、第1側辺25aの外端から第2側辺25bの外端まで、概ね第2係合部11Bの外周面に沿って円弧状に延びている。
In the illustrated example, the protrusion member 25 is a plate-shaped member whose front and back surfaces face in the axial direction. As shown in FIG. 3, the protrusion member 25 has a substantially rectangular shape having a first side side 25a, a second side side 25b, an inner side 25c, and an outer side 25d in a plan view seen from the axial direction. Is.
The first side side 25a is arranged at the center of the side surface of the first engaging portion 11A on the holding portion 12 side in the circumferential direction. The first side side 25a extends in the radial direction. The second side side 25b is arranged at the tip of the side surface of the first engaging portion 11A on the holding portion 12 side in the circumferential direction. The second side 25b extends in the radial direction. The inner side 25c extends from the first side side 25a to the second side side 25b along the inner peripheral surface of the first engaging portion 11A. The outer side 25d extends substantially along the outer peripheral surface of the second engaging portion 11B in an arc shape from the outer end of the first side side 25a to the outer end of the second side side 25b.

前記クランプ部材1を用いて、締付帯部10に挿入された樹脂管100を締め付けて(かしめて)固定する際には、まず、操作部14と第2係合部11Bを操作する。そして、第1係合部11Aを案内部10Aと第2係合部11Bの間に挿入する。その際、突起部材25が隙間CLにガイドされて隙間CLの内部に進入し、突起部材25が第2係合部11Bに接触する。 When the resin pipe 100 inserted into the tightening band portion 10 is tightened (caulked) and fixed by using the clamp member 1, first, the operation portion 14 and the second engaging portion 11B are operated. Then, the first engaging portion 11A is inserted between the guide portion 10A and the second engaging portion 11B. At that time, the protrusion member 25 is guided by the gap CL and enters the inside of the gap CL, and the protrusion member 25 comes into contact with the second engaging portion 11B.

よって、係合部11A,11B同士が相対的に軸方向にずれることを突起部材25により防止できる。これにより、第1係合部11Aと第2係合部11Bとの係合面積が小さくなることを突起部材25で阻止して、第1係合歯13Aと第2係合歯13Bとの係合を確実に行える。このように、第1係合歯13Aと第2係合歯13Bとを噛合する面積が十分確保されるので、締付帯部10により樹脂管100を安定してクランプできる。 Therefore, the protrusion member 25 can prevent the engaging portions 11A and 11B from being relatively displaced in the axial direction. As a result, the protrusion member 25 prevents the engaging area between the first engaging portion 11A and the second engaging portion 11B from becoming smaller, and the engagement between the first engaging tooth 13A and the second engaging tooth 13B is engaged. You can be sure of the match. As described above, since a sufficient area for meshing the first engaging tooth 13A and the second engaging tooth 13B is secured, the resin tube 100 can be stably clamped by the tightening band portion 10.

また、突起部材25は、締付帯部10の縮径状態(すなわち、かしめ状態)の程度を示す機能を備えている。すなわち、第1係合部11Aと第2係合部11Bとを係合させて締付帯部10で樹脂管100をかしめた状態において、締付帯部10が樹脂管100を正常にかしめているか否かを突起部材25で判断できる。以下、締付帯部10のかしめ状態を突起部材25で判断する例を図5から図7に基づいて説明する。 Further, the protrusion member 25 has a function of indicating the degree of the diameter reduction state (that is, the caulking state) of the tightening band portion 10. That is, in a state where the first engaging portion 11A and the second engaging portion 11B are engaged and the resin pipe 100 is crimped by the tightening band portion 10, whether or not the tightening band portion 10 normally crimps the resin pipe 100. It can be determined by the protrusion member 25. Hereinafter, an example in which the crimped state of the tightening band portion 10 is determined by the protrusion member 25 will be described with reference to FIGS. 5 to 7.

図5に示すように、操作部14と第2係合部11Bとが周方向にかしめられた状態において、第2係合部11Bの先端面(周方向の端縁)11Cが突起部材25の第1側辺(周方向の端縁)25aに対して軸方向において面一(同一線上)に配置されている。この状態において、操作部14と先端面11Cとの周方向の距離がL3になる。 As shown in FIG. 5, in a state where the operating portion 14 and the second engaging portion 11B are crimped in the circumferential direction, the tip surface (edge in the circumferential direction) 11C of the second engaging portion 11B is the protrusion member 25. It is arranged flush with respect to the first side side (edge in the circumferential direction) 25a in the axial direction (on the same line). In this state, the distance between the operation unit 14 and the tip surface 11C in the circumferential direction is L3.

ここで、操作部14と先端面11Cとの周方向の距離L3は、クランプ部材1の締付帯部10で樹脂管100が正常にかしめされた距離である。よって、第2係合部11Bの先端面11Cが突起部材25の第1側辺25aに対して面一に配置されていることを目視する。これにより、樹脂管100が締付帯部10で正常にかしめられていることを確認できる。 Here, the circumferential distance L3 between the operating portion 14 and the tip surface 11C is the distance at which the resin pipe 100 is normally crimped by the tightening band portion 10 of the clamp member 1. Therefore, it is visually observed that the tip surface 11C of the second engaging portion 11B is arranged flush with respect to the first side side 25a of the protrusion member 25. Thereby, it can be confirmed that the resin pipe 100 is normally crimped by the tightening band portion 10.

なお、樹脂管100が締付帯部10で正常にかしめられた状態における操作部14と先端面11Cとの距離L3の具体的な寸法は以下の通りである。
すなわち、樹脂管100の直径が20〜30mmにおいて、樹脂管100が正常にかしめられる操作部14と先端面11Cとの周方向の距離L3は約3mmである。よって、距離L3が約3mm以下の場合に、樹脂管100が締付帯部10で正常にかしめられる。
また、樹脂管100の直径が40mmにおいて、樹脂管100が正常にかしめられる操作部14と先端面11Cとの周方向の距離L3は約4mmである。よって、距離L3が約4mm以下の場合に、樹脂管100が締付帯部10で正常にかしめられる。
さらに、樹脂管100の直径が50mmにおいて、樹脂管100が正常にかしめられる操作部14と先端面11Cとの周方向の距離L3は約5mmである。よって、距離L3が約5mm以下の場合に、樹脂管100が締付帯部10で正常にかしめられる。
The specific dimensions of the distance L3 between the operating portion 14 and the tip surface 11C in a state where the resin pipe 100 is normally crimped by the tightening band portion 10 are as follows.
That is, when the diameter of the resin tube 100 is 20 to 30 mm, the distance L3 in the circumferential direction between the operating portion 14 on which the resin tube 100 is normally crimped and the tip surface 11C is about 3 mm. Therefore, when the distance L3 is about 3 mm or less, the resin pipe 100 is normally crimped by the tightening band portion 10.
Further, when the diameter of the resin tube 100 is 40 mm, the distance L3 in the circumferential direction between the operating portion 14 on which the resin tube 100 is normally crimped and the tip surface 11C is about 4 mm. Therefore, when the distance L3 is about 4 mm or less, the resin pipe 100 is normally crimped by the tightening band portion 10.
Further, when the diameter of the resin tube 100 is 50 mm, the distance L3 in the circumferential direction between the operating portion 14 on which the resin tube 100 is normally crimped and the tip surface 11C is about 5 mm. Therefore, when the distance L3 is about 5 mm or less, the resin pipe 100 is normally crimped by the tightening band portion 10.

図6に示すように、操作部14と第2係合部11Bとが周方向にかしめられた状態において、第2係合部11Bの先端面11Cが突起部材25の第1側辺25aに対して周方向において補強リブ16の側に配置される。この状態において、操作部14と先端面11Cとの周方向の距離が、L3より短いL4になる。 As shown in FIG. 6, in a state where the operating portion 14 and the second engaging portion 11B are crimped in the circumferential direction, the tip surface 11C of the second engaging portion 11B is relative to the first side 25a of the protrusion member 25. It is arranged on the side of the reinforcing rib 16 in the circumferential direction. In this state, the distance between the operation unit 14 and the tip surface 11C in the circumferential direction is L4, which is shorter than L3.

ここで、操作部14と先端面11Cとの周方向の距離L4は、距離L3より小さい。よって、クランプ部材1の締付帯部10で樹脂管100が正常にかしめされた距離である。これにより、第2係合部11Bの先端面11Cが突起部材25の第1側辺25aに対して周方向において操作部14側に配置されていることを目視することにより、樹脂管100が締付帯部10で正常にかしめられていることを確認できる。 Here, the distance L4 in the circumferential direction between the operation unit 14 and the tip surface 11C is smaller than the distance L3. Therefore, it is the distance at which the resin pipe 100 is normally crimped by the tightening band portion 10 of the clamp member 1. As a result, the resin tube 100 is tightened by visually observing that the tip surface 11C of the second engaging portion 11B is arranged on the operating portion 14 side in the circumferential direction with respect to the first side side 25a of the protrusion member 25. It can be confirmed that the incidental portion 10 is normally crimped.

図7に示すように、操作部14と第2係合部11Bとが周方向にかしめられた状態において、第2係合部11Bの先端面11Cが突起部材25の第1側辺25aに対して周方向において操作部14の反対側に配置される。この状態において、操作部14と先端面11Cとの周方向の距離が、L3よりも長いL5になる。 As shown in FIG. 7, in a state where the operating portion 14 and the second engaging portion 11B are crimped in the circumferential direction, the tip surface 11C of the second engaging portion 11B is relative to the first side 25a of the protrusion member 25. It is arranged on the opposite side of the operation unit 14 in the circumferential direction. In this state, the distance between the operation unit 14 and the tip surface 11C in the circumferential direction is L5, which is longer than L3.

ここで、操作部14と先端面11Cとの周方向の距離L5は、距離L3より大きい。よって、クランプ部材1の締付帯部10で樹脂管100が正常にかしめられていない距離である。これにより、第2係合部11Bの先端面11Cが突起部材25の第1側辺25aに対して周方向において操作部14の反対側に配置されていることを目視することにより、樹脂管100が締付帯部10で正常にかしめられていないことを確認できる。 Here, the distance L5 in the circumferential direction between the operation unit 14 and the tip surface 11C is larger than the distance L3. Therefore, the distance is such that the resin pipe 100 is not normally crimped at the tightening band portion 10 of the clamp member 1. As a result, by visually observing that the tip surface 11C of the second engaging portion 11B is arranged on the opposite side of the operating portion 14 in the circumferential direction with respect to the first side side 25a of the protrusion member 25, the resin tube 100 Can be confirmed not to be normally crimped by the tightening band portion 10.

以上説明したように、本実施形態に係るクランプ部材1によれば、第1係合部11Aに突起部材25が形成されている。突起部材25は、第2係合部11Bに向けて突出され、係合部11A,11B同士による締付帯部10の縮径状態の程度を示す。よって、締付帯部10の縮径状態を、突起部材25を目視することにより確認できる。このため、施工現場において、締付帯部10の縮径状態を確認するために、操作部14と先端面11Cとの距離(すなわち、第1係合部11Aと第2係合部11Bとの間隔)を測定する手間を省くことができる。これにより、電気融着継手2に樹脂管100を接続する施工作業の施工性を高めることができる。 As described above, according to the clamp member 1 according to the present embodiment, the protrusion member 25 is formed on the first engaging portion 11A. The protrusion member 25 is projected toward the second engaging portion 11B, and indicates the degree of diameter reduction of the tightening band portion 10 by the engaging portions 11A and 11B. Therefore, the reduced diameter state of the tightening band portion 10 can be confirmed by visually observing the protrusion member 25. Therefore, in order to confirm the reduced diameter state of the tightening band portion 10 at the construction site, the distance between the operating portion 14 and the tip surface 11C (that is, the distance between the first engaging portion 11A and the second engaging portion 11B). ) Can be saved. As a result, the workability of the construction work of connecting the resin pipe 100 to the electric fusion joint 2 can be improved.

また、突起部材25は、第2係合部11Bに対して軸方向にずらされて配置されている。よって、第1係合部11Aと第2係合部11Bとを係合させた状態において、突起部材25を目視しやすい位置に配置できる。このため、締付帯部10の縮径状態を確認する際に、突起部材25の第1側辺25aと、第2係合部11Bの先端面11Cとを目視で容易に比較できる。これにより、電気融着継手2に樹脂管100を接続する施工作業の施工性を一層高めることができる。 Further, the protrusion member 25 is arranged so as to be displaced in the axial direction with respect to the second engaging portion 11B. Therefore, in a state where the first engaging portion 11A and the second engaging portion 11B are engaged, the protrusion member 25 can be arranged at a position where it is easy to see. Therefore, when confirming the reduced diameter state of the tightening band portion 10, the first side side 25a of the protrusion member 25 and the tip surface 11C of the second engaging portion 11B can be easily visually compared. As a result, the workability of the construction work of connecting the resin pipe 100 to the electric fusion joint 2 can be further improved.

さらに、クランプ部材1で締付帯部10に挿入された樹脂管100をかしめて固定する際に、突起部材25が隙間CLにガイドされて隙間CLの内部に進入する。進入した突起部材25は、軸方向に沿って第2係合部11Bに接近すると、第2係合部11Bの軸方向の側面に接触する。この突起部材25は、軸方向に沿って第2係合部11Bから離間しようとすると、連結片12Aに接触する。ここで突起部材25は、第1係合部11Aに一体に設けられ、第2係合部11Bと連結片12A(保持部12)とは一体に設けられている。よって、第1係合部11Aと第2係合部11Bとが軸方向へ相対的にずれることを防止できる。このため、第1係合部11Aと第2係合部11Bとの係合面積が小さくなることを突起部材25で阻止して、第1係合歯13Aと第2係合歯13Bの係合を確実に行える。これにより、第1係合歯13Aと第2係合歯13Bとを噛合する面積が十分確保されるので、締付帯部10により樹脂管100を安定してクランプできる。 Further, when the resin pipe 100 inserted into the tightening band portion 10 is crimped and fixed by the clamp member 1, the protrusion member 25 is guided by the gap CL and enters the inside of the gap CL. When the protruding member 25 that has entered approaches the second engaging portion 11B along the axial direction, it comes into contact with the axial side surface of the second engaging portion 11B. The protruding member 25 comes into contact with the connecting piece 12A when trying to separate from the second engaging portion 11B along the axial direction. Here, the protrusion member 25 is integrally provided with the first engaging portion 11A, and the second engaging portion 11B and the connecting piece 12A (holding portion 12) are integrally provided. Therefore, it is possible to prevent the first engaging portion 11A and the second engaging portion 11B from being relatively displaced in the axial direction. Therefore, the protrusion member 25 prevents the engagement area between the first engaging portion 11A and the second engaging portion 11B from becoming small, and the engagement between the first engaging tooth 13A and the second engaging tooth 13B is prevented. Can be done reliably. As a result, a sufficient area for meshing the first engaging tooth 13A and the second engaging tooth 13B is secured, so that the resin pipe 100 can be stably clamped by the tightening band portion 10.

なお、突起部材25は、予め第2係合部11Bと保持部12の連結片12Aとの間の隙間CLに延ばすように形成してもよい。この場合においても、第1係合歯13Aと第2係合歯13Bは突起部材25にガイドされて係合位置に相対移動できる。
また、突起部材25は、第1係合部11Aに代えて第2係合部11Bの先端部に形成されていてもよい。また、突起部材25は、第1係合部11Aや第2係合部11Bにおいて、隙間CLの反対側の側面に設けてもよい。また、突起部材25は、第1係合部11Aまたは第2係合部11Bの両側面に設けてもよい。すなわち、突起部材25は、第1係合部11Aおよび第2係合部11Bのいずれに設けられていてもよい。突起部材25は、第1係合部11Aおよび第2係合部11Bの一方に設けられ、他方に向けて突出する任意の構成を適宜採用することができる。
The protrusion member 25 may be formed in advance so as to extend into the gap CL between the second engaging portion 11B and the connecting piece 12A of the holding portion 12. Even in this case, the first engaging tooth 13A and the second engaging tooth 13B can be relatively moved to the engaging position by being guided by the protrusion member 25.
Further, the protrusion member 25 may be formed at the tip end portion of the second engaging portion 11B instead of the first engaging portion 11A. Further, the protrusion member 25 may be provided on the side surface of the first engaging portion 11A or the second engaging portion 11B on the opposite side of the gap CL. Further, the protrusion members 25 may be provided on both side surfaces of the first engaging portion 11A or the second engaging portion 11B. That is, the protrusion member 25 may be provided on either the first engaging portion 11A or the second engaging portion 11B. The protrusion member 25 is provided on one of the first engaging portion 11A and the second engaging portion 11B, and any configuration that projects toward the other can be appropriately adopted.

次に、クランプ部材1を用いて電気融着継手2に樹脂管100を接続する施工作業を図1、図2、図4から図6に基づいて説明する。
図1、図2に示すように、樹脂管100を熱融着により電気融着継手2に接続、固定する際には、クランプ部材1における保持部12の挿通孔12C内に、電気融着継手2の給電端子22を挿通する。これにより、電気融着継手2の給電端子22を保持部12で保持する。
Next, the construction work of connecting the resin pipe 100 to the electric fusion joint 2 using the clamp member 1 will be described with reference to FIGS. 1, 2, 4 to 6.
As shown in FIGS. 1 and 2, when the resin pipe 100 is connected to and fixed to the electric fusion joint 2 by heat fusion, the electric fusion joint is formed in the insertion hole 12C of the holding portion 12 of the clamp member 1. The power supply terminal 22 of 2 is inserted. As a result, the power supply terminal 22 of the electric fusion joint 2 is held by the holding portion 12.

そして、保持部12における連結片12A、および締付帯部10に形成された突出片17を、電気融着継手2の開口端縁に各別に当接する。連結片12Aおよび突出片17を当接させた状態において、樹脂管100が締付帯部10の内側を通って、電気融着継手2の開口部内に挿通できるようにクランプ部材1を位置決めする。
この状態において、締付帯部10における軸方向の一方側の端部と、電気融着継手2の開口端縁と、の間に3mm(L1、L2に相当する長さ)の隙間が形成される。
Then, the connecting piece 12A in the holding portion 12 and the protruding piece 17 formed in the tightening band portion 10 are separately brought into contact with the open end edge of the electric fusion joint 2. With the connecting piece 12A and the protruding piece 17 in contact with each other, the clamp member 1 is positioned so that the resin pipe 100 can pass through the inside of the tightening band portion 10 and be inserted into the opening of the electric fusion joint 2.
In this state, a gap of 3 mm (length corresponding to L1 and L2) is formed between the one end of the tightening band 10 in the axial direction and the open end edge of the electric fusion joint 2. ..

そして、樹脂管100をクランプ部材1の締付帯部10の内側に挿入しながら、電気融着継手2の開口部に挿入する。この状態において、クランプ部材1における一対の係合部11A,11Bに各別に形成された係合歯13A,13B同士を互いに係合させる。係合部11A,11Bの操作は、例えば前述したように、操作部14と第2係合部11Bとをペンチで締める(かしめる)ことで行う。 Then, the resin pipe 100 is inserted into the opening of the electric fusion joint 2 while being inserted inside the tightening band portion 10 of the clamp member 1. In this state, the engaging teeth 13A and 13B separately formed on the pair of engaging portions 11A and 11B of the clamp member 1 are engaged with each other. The operation of the engaging portions 11A and 11B is performed, for example, by tightening (caulking) the operating portion 14 and the second engaging portion 11B with pliers, as described above.

図5、図6に示すように、操作部14と第2係合部11Bとをペンチで締めることにより、突起部材25が隙間CLにガイドされて隙間CLの内部に進入する。よって、第1係合部11Aと第2係合部11Bとが相対的に軸方向にずれることを突起部材25で防止できる。この状態において、第2係合部11Bの先端面11Cと、隙間CLの内部に進入した突起部材25と、の相対的な位置関係を目視する。このとき、第2係合部11Bの先端面11Cが、突起部材25の第1側辺25aに対して軸方向において面一に配置されていることを確認する。あるいは、第2係合部11Bの先端面11Cが、突起部材25の第1側辺25aに対して操作部14側に配置されていることを確認する。その後、操作部14と第2係合部11Bとのペンチによるかしめ作業を完了する。 As shown in FIGS. 5 and 6, by tightening the operation portion 14 and the second engaging portion 11B with pliers, the protrusion member 25 is guided by the gap CL and enters the inside of the gap CL. Therefore, the protrusion member 25 can prevent the first engaging portion 11A and the second engaging portion 11B from being relatively displaced in the axial direction. In this state, the relative positional relationship between the tip surface 11C of the second engaging portion 11B and the protrusion member 25 that has entered the inside of the gap CL is visually observed. At this time, it is confirmed that the tip surface 11C of the second engaging portion 11B is arranged flush with respect to the first side side 25a of the protrusion member 25 in the axial direction. Alternatively, it is confirmed that the tip surface 11C of the second engaging portion 11B is arranged on the operating portion 14 side with respect to the first side side 25a of the protrusion member 25. After that, the caulking work of the operating portion 14 and the second engaging portion 11B with pliers is completed.

図1、図4に示すように、係合歯13A,13B同士が互いに係合した状態に保たれる。よって、第1係合部11Aおよび第2係合部11B同士が、締付帯部10が拡径する方向に、互いに相対変位するのを規制することができる。これにより、クランプ部材1により、電気融着継手2と樹脂管100とが仮固定(固定)された状態となる。 As shown in FIGS. 1 and 4, the engaging teeth 13A and 13B are kept engaged with each other. Therefore, it is possible to prevent the first engaging portion 11A and the second engaging portion 11B from being displaced relative to each other in the direction in which the tightening band portion 10 expands in diameter. As a result, the clamp member 1 temporarily fixes (fixes) the electric fusion joint 2 and the resin pipe 100.

この状態において、給電端子22に電流を流すことにより、電気融着継手2に樹脂管100を熱融着する。熱融着が完了した後、例えば、クランプ部材1を電気融着継手2に付けたまま残置しておく。その後、通水試験を行ない、漏水が発生しなければクランプ部材1を残置したまま通水して、電気融着継手2や樹脂管100からなる配管システムを使用する。 In this state, the resin pipe 100 is heat-sealed to the electric fusion joint 2 by passing an electric current through the power feeding terminal 22. After the heat fusion is completed, for example, the clamp member 1 is left attached to the electric fusion joint 2. After that, a water flow test is performed, and if water leakage does not occur, water is passed while leaving the clamp member 1, and a piping system including an electric fusion joint 2 and a resin pipe 100 is used.

なおこれらの作業の後、クランプ部材1を、電気融着継手2および樹脂管100から取り外してもよい。仮に、クランプ部材1を取り外す場合には、例えば、第2係合部11Bを径方向の外側に引張りながら、操作部14を周方向のうち、第2係合部11Bから離間する方向に向けて引きぬく。よって、係合部11A,11B同士の係合が解除される。これにより、締付帯部10を樹脂管100から取り外し、保持部12の挿通孔12Cを給電端子22から取り外すことができる。
また、クランプ部材1を残置する場合には、係合部11A,11Bの幅を引き抜きできない程度にしておくことが好ましい。
After these operations, the clamp member 1 may be removed from the electric fusion joint 2 and the resin pipe 100. If the clamp member 1 is to be removed, for example, while pulling the second engaging portion 11B outward in the radial direction, the operating portion 14 is directed in the circumferential direction away from the second engaging portion 11B. Pull out. Therefore, the engagement between the engaging portions 11A and 11B is released. As a result, the tightening band portion 10 can be removed from the resin pipe 100, and the insertion hole 12C of the holding portion 12 can be removed from the power feeding terminal 22.
Further, when the clamp member 1 is left, it is preferable that the widths of the engaging portions 11A and 11B are set so that they cannot be pulled out.

以上説明したように、本実施形態に係るクランプ部材1によれば、クランプ部材1が樹脂製であるため、安価な構成とすることができる。このため、同時に複数のクランプ部材1を手配したとしても費用がかさむことが抑えられ、例えば、電気融着継手2に樹脂管100を接続する施工作業を、複数の箇所で効率的に行うこと等ができる。
また、内側に樹脂管100が挿入された締付帯部10の縮径状態を保持する一対の係合部11A、11Bを備えているので、締付帯部10により確実に樹脂管100を保持することができる。
また、電気融着継手2の給電端子22を保持する保持部12が締付帯部10に連結されているので、電気融着継手2と別体により構成されたクランプ部材1により、電気融着継手2を確実に保持することができる。
As described above, according to the clamp member 1 according to the present embodiment, since the clamp member 1 is made of resin, an inexpensive configuration can be obtained. Therefore, even if a plurality of clamp members 1 are arranged at the same time, the cost can be suppressed. For example, the construction work of connecting the resin pipe 100 to the electric fusion joint 2 can be efficiently performed at a plurality of locations. Can be done.
Further, since the pair of engaging portions 11A and 11B for holding the reduced diameter state of the tightening band portion 10 in which the resin tube 100 is inserted are provided, the resin tube 100 is securely held by the tightening band portion 10. Can be done.
Further, since the holding portion 12 that holds the power feeding terminal 22 of the electric fusion joint 2 is connected to the tightening band portion 10, the electric fusion joint 2 and the clamp member 1 formed separately from the electric fusion joint 2 are used for the electric fusion joint. 2 can be reliably held.

なお、本発明の技術的範囲は前記実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。
その他、本発明の趣旨に逸脱しない範囲で、前記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り、また、前記した変形例を適宜組み合わせてもよい。
The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
In addition, it is possible to replace the constituent elements in the above-described embodiment with well-known constituent elements as appropriate without departing from the spirit of the present invention, and the above-mentioned modified examples may be appropriately combined.

1 クランプ部材
2 電気融着継手
10 締付帯部
11A 第1係合部(係合部)
11B 第2係合部(係合部)
12 保持部
22 給電端子
25 突起部材
100 樹脂管
CL 隙間
O 中心軸線
1 Clamp member 2 Electric fusion joint 10 Tightening band part 11A First engaging part (engaging part)
11B 2nd engaging part (engaging part)
12 Holding part 22 Power supply terminal 25 Protruding member 100 Resin pipe CL Gap O Center axis

Claims (3)

熱可塑性樹脂製の樹脂管と、前記樹脂管が熱融着により接続される電気融着継手と、を固定する樹脂製のクランプ部材であって、
内側に前記樹脂管が挿入された状態で、前記樹脂管を保持するように縮径可能な締付帯部と、
前記締付帯部の中心軸線回りに周回する周方向に互いに係合することで、前記締付帯部の縮径状態を維持する一対の係合部と、
前記締付帯部に連結され、前記電気融着継手の給電端子を保持する保持部と、を備え、
前記一対の係合部のうちの第1係合部には、第2係合部に向けて突出し、前記一対の係合部同士の縮径状態の程度を示す突起部材が形成されているクランプ部材。
A resin clamp member for fixing a resin pipe made of a thermoplastic resin and an electric fusion joint to which the resin pipe is connected by heat fusion.
With the resin pipe inserted inside, a tightening band that can be reduced in diameter to hold the resin pipe,
A pair of engaging portions that maintain a reduced diameter state of the tightening band portion by engaging with each other in a circumferential direction that orbits around the central axis of the tightening band portion.
It is provided with a holding portion which is connected to the tightening band portion and holds a power feeding terminal of the electric fusion joint.
A clamp in which a protruding member is formed on the first engaging portion of the pair of engaging portions so as to project toward the second engaging portion and indicate the degree of diameter reduction between the pair of engaging portions. Element.
前記突起部材は、前記一対の係合部同士が前記中心軸線に沿う軸方向に相対的にずれることを阻止する請求項1に記載のクランプ部材。 The clamp member according to claim 1, wherein the protrusion member prevents the pair of engaging portions from being relatively displaced in the axial direction along the central axis. 前記突起部材は、前記第2係合部に対して前記中心軸線に沿う軸方向にずらされている請求項1または2に記載のクランプ部材。 The clamp member according to claim 1 or 2, wherein the protruding member is displaced in the axial direction along the central axis with respect to the second engaging portion.
JP2019168307A 2019-09-17 2019-09-17 clamp member Active JP7368988B2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001041212A (en) * 1999-08-02 2001-02-13 Piolax Inc Holder for linear body
JP2006242378A (en) * 2005-02-28 2006-09-14 Illinois Tool Works Inc <Itw> Slipping-out preventive ratchet clip
JP2013113314A (en) * 2011-11-25 2013-06-10 Kubota-Ci Co Electric fusion joint, joining method using the same, and joining structure between electric fusion joint and synthetic resin tube

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001041212A (en) * 1999-08-02 2001-02-13 Piolax Inc Holder for linear body
JP2006242378A (en) * 2005-02-28 2006-09-14 Illinois Tool Works Inc <Itw> Slipping-out preventive ratchet clip
JP2013113314A (en) * 2011-11-25 2013-06-10 Kubota-Ci Co Electric fusion joint, joining method using the same, and joining structure between electric fusion joint and synthetic resin tube

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