JP2001157341A - Piping joint for cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping joint for cable which can secure a sufficient expansion/contraction margin in the axial direction. SOLUTION: A 1st head part 2 into which one side piping is inserted, a 2nd head part 4 into which the other side piping is inserted and an outer cylinder part 5 which are put onto the 2nd head part 4 and the 1st head part 2, are provided. The 1st and 2nd head parts 2 and 4 which can slide in the outer cylinder part 5 respectively comprise sealing material 7, spacers 8 which have tapered surfaces 81 on the inner circumferential surfaces thereof, choking rings 9 whose diameters are reduced by pressing them against the tapered surfaces 81 of the spacers 8, tightening rings 10 which press the spacers 8 in pushing-in directions with the sealing materials 7 therebetween, and an inner cylinder 6 in which the sealing materials 7, the spacers 8, the choking rings 9 and the tightening rings 10 are incorporated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a pipe joint for a cable.

[0002]

2. Description of the Related Art Various types of joints have been used for piping for inserting cables such as optical fiber cables, communication wires, and power wires. Although illustration is omitted, for example, in a joint main body having a tapered surface on the inner side that reduces the diameter in the pipe pulling-out direction, a retaining member that has a claw member on the inner peripheral surface that hooks in the retaining direction with respect to the outer surface of the piping is provided. There are joints in which the ring is tightened with a lock nut.

[0003]

By the way, at a piping site for storing cables for communication and power transmission, the piping work on the bridge side and the piping work on the ground (land) side are performed separately. There was no pipe joint that could cleverly connect the gap in the axial direction between the two pipe ends when connecting and connecting the two pipe ends. In addition, piping for storing cables for communication and power transmission not only secures expansion and contraction allowance due to temperature changes, etc., but also provides sufficient expansion and contraction allowance so that it will not be cut off even when a large earthquake occurs. A joint structure that can be secured is required. However, it is not easy to obtain sufficient expansion and contraction allowance in the joint main body in the above-described conventional pipe joint for cables. In addition, the construction workability on site was not good in the configuration in which the lock nut was used.

[0004] Therefore, the present invention provides a pipe joint that can be satisfactorily filled in the gaps in the axial direction of the pipes that have been separately advanced as described above, and that can be connected so that no recess is formed on the inner diameter side. And a second object of the present invention is to provide a pipe joint for a cable which can secure sufficient expansion and contraction allowance in the pipe axis direction and has good workability.

[0005]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a first head portion into which one pipe is inserted, a second head portion into which the other pipe is inserted, and An outer cylindrical portion extending integrally from the second head portion to the first head portion side and externally fitted to the first head portion in a sealing manner, and an axial gap between the two pipes. The first head portion is provided with a gap interposition extension having an inner diameter substantially equal to the inner diameter of the two pipes and an outer diameter not larger than the outer diameter of the other pipe. , Integrally.

A first head portion into which one pipe is inserted, a second head portion into which the other pipe is inserted,
An outer cylinder portion integrally extending from the head portion to the first head portion side, and externally fitted to the first head portion in a sealing manner, the first cylinder portion being slidable in the outer cylinder portion. The head portion is a sealing material, a spacer having a tapered surface on the inner peripheral surface, a retaining ring that is reduced in diameter by being pressed against the tapered surface of the spacer, and the spacer is pushed in the pushing direction via the sealing material. The pressing ring and the pressing ring are incorporated in the inner cylinder.

A first head portion into which one pipe is inserted, a second head portion into which the other pipe is inserted,
An outer cylinder portion slidably and sealingly fitted to the second head portion, wherein the first head portion and the second head portion have a sealing material and a spacer having a tapered inner peripheral surface; And a retaining ring that is reduced in diameter by being pressed against the tapered surface of the spacer, and a tightening ring that presses the spacer in the pushing direction via the sealing material.

[0008] Alternatively, a first head portion into which one pipe is inserted, a second head portion into which the other pipe is inserted, and one end fixed to the second head portion, and the first head portion is connected to the first head portion. An outer cylinder portion extending integrally and elastically fitted to the first head portion so as to be extendable and retractable, wherein the first head portion and the second
The head portion is a sealing material, a spacer having a tapered surface on the inner peripheral surface, a retaining ring that is reduced in diameter by being pressed against the tapered surface of the spacer, and the spacer is pushed in the pushing direction via the sealing material. The pressing ring and the pressing ring are incorporated in the inner cylinder.

Further, a first head portion into which one of the pipes is inserted, a second head portion into which the other pipe is inserted, and integrally extending from the second head portion toward the first head portion. An outer cylinder part which is fitted to the first head part in a sealing manner. The first head part slidable in the outer cylinder part has a sealing material and a tapered surface on an inner peripheral surface. A spacer, a retaining ring that is reduced in diameter by being pressed against the tapered surface of the spacer, and a tightening ring that presses the spacer in the pushing direction via the sealing material are incorporated in the inner cylindrical body, A retaining member for retaining the second head portion fixed to the outer cylindrical portion at the insertion end of the other pipe in a retaining direction, and a seal disposed inside the retaining member; And a material.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a pipe joint for a cable according to the present invention.

FIGS. 1 to 3 are cross-sectional views showing an embodiment of a pipe joint. In these figures, reference numeral 1 denotes one connected pipe, for example, a vinyl chloride material or a polyethylene material. Is a first head portion into which one of the pipes 1 is inserted. Reference numeral 3 denotes the other pipe to be connected, which is made of, for example, a relatively hard synthetic resin pipe (having a higher hardness than the one pipe 1) or a synthetic resin-coated steel pipe made of a hard vinyl chloride material or the like, Reference numeral 4 denotes a fixed second head into which the other pipe 3 is inserted. Reference numeral 5 denotes an outer cylindrical portion made of a metal material. The outer cylindrical portion 5 extends integrally from the second head portion 4 to the first head portion 2 (see FIG. 1) slid to the farthest position. Head part 2,
4 is externally fitted in a sealed manner.

The first head 2 is a head 61 of the inner cylinder 6.
The sealing material 7, a spacer 8 having a tapered surface 81 on the inner peripheral surface, a retaining ring 9 that is reduced in diameter by being pressed against the tapered surface 81 of the spacer 8,
Tightening ring 10 for pressing the spacer 8 in the pushing direction
And the sponge material 11 are incorporated. A pair of O-rings 12, 12 for sealing between the inner cylinder 6 and the outer cylinder 5 are fitted and mounted on the outer peripheral portion of the inner cylinder 6.
The outer cylinder portion 5 can slide relatively from the position shown in FIG. 1 to the position shown in FIG. One end of the outer cylinder 5 is connected to the head 61 of the inner cylinder 6.
In order to prevent the outside from jumping outward, the diaphragm portion 51 is reduced in diameter.

More specifically, as shown in FIGS. 4 (a), 4 (b) and 4 (c), the inner diameter of the tightening ring 10 is set to be slightly larger than that of one of the pipes 1 and the outer periphery of the front half thereof. A male screw 101 formed on the inner cylindrical body 6 is screwed into a female screw 62 formed on the inner periphery of the outer end of the head portion 61 of the inner cylindrical body 6, and is rearwardly provided from a flange 104 raised in a stepped manner in the latter half thereof. By rotating an operating portion 102 having a knurl groove or the like (not shown) formed on the extended outer peripheral surface, the tightening ring 10 can be moved forward and backward in the cylinder axis direction of the inner cylinder 6. The inner periphery of the latter half (outer side) is a guide portion 103 formed to open outward to facilitate insertion of one of the pipes 1.

A seal member 7, a spacer 8, and a retaining ring 9 which are respectively fitted to one of the pipes 1 are sequentially provided on the inner peripheral surface of the head portion 61 inside the female screw 62, and are sequentially provided. The inner end of the retaining ring 9 is in contact with the first step portion 13 to restrict the movement inward therefrom, and is formed inside (the back side) of the first step portion 13. The sponge material 11 that is in contact with the tip of one of the pipes 1 is fitted to the second step portion 14.

The above-mentioned sealing material 7 is a ring-shaped packing material (or an O-ring or the like) with a lip formed in a direction along the direction in which the pipe 1 is inserted. Is provided. Spacer 8
Is a metal (or hard synthetic resin) ring,
The inner peripheral surface is formed with a tapered surface 81 (in the state of being installed) that is reduced in diameter in the axial direction outward.
It is decorated with 81 facing inward.

A tapered surface 82 is formed on the outer peripheral surface of the spacer 8 so as to reduce its diameter inward in the axial direction (in the pushing direction), while an inner surface corresponding to the tapered surface 82 is formed. The inner peripheral surface of the cylindrical body 6 is formed with a tapered surface 64 whose diameter is reduced inward in the axial direction. Thereby, as described later, when the tightening ring 10 is tightened to the limit, the tapered surface 82 of the spacer 8 comes into contact with the tapered surface 64 of the inner cylindrical body 6 and cannot move inward any more. Retaining ring 9
Is allowed to increase.

The retaining ring 9 is made of a metal (or a hard synthetic resin) having a cut for enabling the diameter to be reduced.
A plurality of annular ridges 92 are formed on the inner peripheral surface of the ring body, and are engaged with the outer peripheral surface of one of the pipes 1 in the retaining direction. The outer peripheral edge of the side of the spacer 8 which comes into contact with the tapered surface 81 (in the state where the spacer is installed) has a tapered surface 91 which is reduced in diameter toward the outside of the cylindrical shaft.
Are formed.

With such a configuration, first, FIG.
Screw the tightening ring 10 from the initial state shown in
104 until it comes into contact with the outer end surface of the inner cylinder 6.
In this state, as shown in FIG.
Is inserted, the pipe 1 is tightened by the elastic urging force while expanding the retaining ring 9, and FIG.
As shown in (1), the tip of the pipe 1 comes into contact with the sponge material 11 to complete the insertion. At this point, the connection of the pipe 1 is completed.

More specifically, as shown in FIG.
When the tightening ring 10 is tightened to the limit, a gap is set between the retaining ring 9 and the spacer 8 to allow the retaining ring 9 to expand in diameter (by inserting the pipe 1). . In this state, when the pipe 1 is pushed in, the sealing material 7 is pushed inward in the axial direction, and the spacer 8 is pushed inward in the axial direction together with the sealing material 7. Tapered surface 82 formed on outer peripheral surface
However, the spacer 8 comes into contact with the tapered surface 64 formed on the inner peripheral surface of the inner cylindrical body 6, so that the spacer 8 cannot move inward any more and stops at a position where the expansion of the retaining ring 9 is not prevented. It becomes possible to push the pipe 1 to the limit.

Therefore, at that time, the pipe 1 is tightened in the retaining state by the elastic urging force of the retaining ring 9 itself. The enlarged tapered surface 91 of the retaining ring 9 comes into contact with the tapered surface 81 of the spacer 8 as shown in FIG. As a result, the sealing material 7 is pressed, so that high sealing performance can be secured.

In such a configuration, the retaining ring 9 expanded in diameter by the pipe 1 is provided with a sufficient retaining state on the outer peripheral surface of the pipe 1 when the pipe 1 is pulled out. Since the hooking is performed, the tapered surface 91 does not necessarily have to be in contact with the tapered surface 82 on the outer peripheral surface of the spacer 8.

The tapered surface 81 of the spacer 8 is a stepped parallel surface, and the tapered surface 64 of the inner peripheral surface of the inner cylindrical body 6 is a stepped parallel surface corresponding to the stepped parallel surface of the spacer 8. At least, the spacer 8 may stop at a position where the expansion of the retaining ring 9 is not hindered. That is, the retaining ring 9 is freely expandable between the spacer 8 and the retaining ring 9. In order to secure the gap as described above, it is sufficient that the configuration is such that movement inward in the axial direction is restricted.

On the other hand, as shown in FIGS. 1 to 3, the second head part 4 is fixedly provided inside the end of the outer cylinder part 5 on the side where the other pipe 3 is inserted. Retaining member 15 that is retained on the outer peripheral surface of the insertion end in the retaining direction.
And a seal member 16 provided inside thereof, and a guide ring 17 formed in an outwardly open shape provided outside the retaining member 15.

More specifically, the guide ring 17 is made of a metal material (or a hard synthetic resin material), and is formed in an outwardly open shape to facilitate insertion of the other pipe 3.
172 and the flange portion 171 are integrally formed. As shown in FIG. 5, the retaining member 15 is provided with a bending angle θ inwardly inside the metal ring body 151 (see FIG. 1).
Are formed at predetermined intervals via an elastically constricted portion 154 which is easily bent and elastically deformed, and has a hook at its tip end for biting into the outer peripheral surface of one of the pipes 1. A stop blade 153 is formed. The locking blade 153
The shape of the inner end is preferably a convex curved surface or a straight shape that is easy to bite into the pipe.

On the inner side of the retaining member 15 in the cylinder axis direction, a lip whose movement is regulated by a retaining projection 52 formed on the inner surface of the outer cylinder portion 5 so as to protrude toward the inner peripheral direction. A ring-shaped spacer for maintaining a space between the seal member 16 and an annular packing material (or an O-ring or the like) provided with
18, the flange portion 181, the peripheral edge of the ring body 151 of the retaining member 15, and the guide ring 17.
And the flange portion 171 are fixed to the other end 55 of the outer cylinder portion 5 bent in a folded shape by caulking.

The bending angle θ (see FIG. 1) of the retaining projection 152 may be appropriately selected and set within a range of 35 ° ≦ θ ≦ 55 °. By inclining at such an angle, the pipe 3 can be easily pushed in, and the latching blade 153 can easily bite into the pipe 3, and the pulling force in the pull-out direction is 30 to 35 with respect to the pushing force. It has been confirmed that it can be doubled. If θ is smaller than 35 ° or larger than 55 °, the biting property of the locking blade 153 is reduced, and a stable locking state cannot be obtained.

With such a configuration, the other pipe 3 is
When inserted into the second head portion 4, the retaining blade 153 of the retaining protrusion 152 can be retained in a retaining state with respect to the outer peripheral surface of the pipe 3, and the retaining member 153 can be retained by the sealing material 16. In a state where the seal between the pipe 3 and the outer cylinder part 5 is secured,
The other pipe 3 can be hooked and connected to the second head 4. 6 and 7 show the retaining member.
15 shows another embodiment, in which an elastic constriction is not particularly provided.

In the first head 2, a gap interposing extension 63 interposed in the axial gap 22 between the pipes 1 and 3 is formed integrally with the head 61. ing.
The extension 63 is a tubular, the inner diameter D _i is substantially equal to the inner diameter of both the pipe 1 and 3 (see FIGS. 2 and 3), and an outer diameter D _o, the other pipe 3 is set to be smaller than the outside diameter.

A method of connecting the pipes 1 and 3 with the pipe joint constructed as described above will be described. Generally, the other pipe 3 shown in FIGS. 2 and 3 (for example, a concrete wall or a bridge) Etc.), and one of the pipes 1 can relatively swing in the directions of the arrows M and N, so that one of the pipes 1 swings in the direction of the arrow M (swing).
Then, as shown in FIG. 1, when the tightening ring 10 is inserted into the first head portion 2 in a state where it is tightened to the limit, and is pushed until the tip portion comes into contact with the sponge material 11, the retaining ring 9 engages Stopped and connected. Then, the outer cylinder part 5 is
To the limit to the left, and swing (swing) in the direction of arrow N in FIG. 2 to insert (extend) the extension 63 into the axial gap 22 between the two pipes 1 and 3. That is, the end face of the extension 63 and the end face of the other pipe 3 are abutted. Next, as shown in FIGS. 2 and 3, the second head 4 and the outer cylinder 5
Is fitted to the other pipe 3 (arrow F in FIG. 3).
Direction), the retaining projections 152 can be hooked on the outer peripheral surface of the other pipe 3, whereby the connection work of both pipes 1 and 3 is completed.

In such a connection state, both pipes 1, 3
Are sealed from the outside by the sealing members 7 and 16 and the O-rings 12 and 12, respectively. As is apparent from a comparison between FIG. 2 and FIG. 3, since the outer cylinder portion 5 and the second head portion 4 are slidable in the direction of arrow F (and the opposite direction), the axial direction gap portion 22 exists. Extension 63 between both pipes 1 and 3
Can be skillfully interposed (interposed), and the workability of construction is improved. As described above, after connecting one pipe 1 to the first head section 2, the other pipe 3 is inserted into the second head section 4 in principle. After inserting one of the pipes 1 into the first head portion 2, a tightening ring (which has been loosened in advance) is used.
10 may be tightened to the limit.

As is apparent from FIG. 3, the inner diameter D _i of the extension portion 63 of the inner cylinder 6, since a substantially equal configuration as the inner diameter of both the pipe 1 and 3, one of the pipe 1 and the other pipe There is no discontinuous portion or large step between them. This allows the cable to be fed smoothly without causing air pockets or vortices when the cable is fed by air. Since the tip of one of the pipes 1 is in contact with the sponge material 11, the sponge material 11 can absorb an assembling error at the time of construction or a processing error at the time of cutting the pipe 1. In addition, discontinuous portions and steps can be more reliably prevented.

In a conventional construction, in the case of a pipe having a plastic anticorrosion outer layer (synthetic resin coating layer), if an annular groove for engaging with a joint member is formed,
An operation called peeling for scraping the plastic anticorrosion outer layer attached to the connection end portion is required,
This work was very troublesome and time-consuming, but with this method, there is no need to perform a peeling work to cut off the plastic anticorrosion outer layer at the time of construction. Can do it.

Further, when the connection of the pipes 1 and 3 is to be released for re-work, repair work, branch work, etc., the outer cylinder 5
To the other pipe 3 side to the limit, and tighten the tightening ring.
When the operating portion 102 of the ten is made to protrude outward from one end of the outer cylinder portion 5 and the operating portion 102 is rotated to retract the tightening ring 10, the retaining ring 9 is removed. Let's expand the diameter,
One of the pipes 1 can be pulled out.

FIGS. 8 to 10 show another embodiment, in which the first head part 2 and the second head part 4 are mutually connected in the outer cylinder part 5 having the narrowed parts 51, 51 formed at both ends. The head portions 2 and 4 are slidable and hermetically sealed.
A spacer 8 having a tapered surface 81 on the inner peripheral surface; a retaining ring 9 which is reduced in diameter by being pressed against the tapered surface 81 of the spacer 8;
And a tightening ring 10 for pressing the inner ring 6 in the pushing direction.
, And has the same configuration as the left and right sides, and has an extension allowance E.

The structure of the two head portions 2 and 4 is different from that of the embodiment shown in FIGS. 1 to 3 in that the extension portion 63 of the inner cylinder 6 in the first head portion 2 is eliminated and only the head portion 61 is provided. The same is true for the connection method,
The description is omitted. In this case, it is suitable for connecting pipes made of a relatively soft material.

FIG. 11 shows another embodiment, in which a concave groove 65 formed on the outer peripheral surface of the inner cylinder body 6 of the second head part 4 is fitted with an outer cylinder part 5.
An engagement end 53 bent in the inner peripheral direction is fitted to the other end side of the inner projection, and the engagement end 53 and the inner protrusion protruding toward the inner periphery are formed.
The second head portion 4 is fixed between the
And a squeezed portion 51 formed on one end side of the outer cylindrical portion 5,
The first head portion 2 is configured to be movable, and has an extension allowance E.

The structure of the two head portions 2 and 4 is different from that of the embodiment shown in FIGS. 1 to 3 in that the extension portion 63 of the inner cylinder 6 in the first head portion 2 is eliminated and only the head portion 61 is provided. The connection is the same, and the connection method is the same, and the description is omitted.

[0038]

According to the first aspect of the present invention, the other pipe 3 is fixed by a concrete wall or the like. Then, by interposing the gap interposed extension 63 here, the (butting) connection operation of the two pipes 1 and 3 can be performed efficiently.

[0039] Moreover, since the inner diameter D _i of the extension portion 63 is substantially equal to the inner diameter of both the pipe 1 and 3, an air pumping method,
Optical fiber cables, communication cables, electric wires (or nominal lines) can be passed smoothly and without catching. The outer diameter D _o of the extension 63 by which the following outer diameter of the other pipe 3, the slide in the second axis direction of the head portion 4 is facilitated.

According to the second aspect of the present invention, the first head portion 2 is slidably sealed in a sealed manner in the outer cylindrical portion 5, and the first head portion 2 is formed of a sealing material 7 and an inner peripheral portion. Tapered surface
A spacer 8 having a spacer 81, a retaining ring 9 that is reduced in diameter by being brought into contact with the tapered surface 81 of the spacer 8, and a tightening ring 10 that presses the spacer 8 in the pushing direction via the sealing material 7. Since it is configured to be incorporated in the inner cylinder 6, one of the pipes 1 can be connected with good workability in a retaining state, and a high sealing performance can be ensured. Can be secured.

The connection configuration of the other pipe 3 is not limited to the embodiment and may be appropriately selected and set. For example, the outer cylinder 5 may be formed by using a fastening member such as a bolt and a nut. Another connecting member may be connected.

(According to claim 3) The first cylindrical member 5
・ The second heads 2 and 4 are sealed and slidable,
The two head portions 2 and 4 are formed of a sealing material 7, a spacer 8 having a tapered surface 81 on an inner peripheral surface, and a tapered surface of the spacer 8.
Since the retaining ring 9 that is reduced in diameter by being brought into contact with 81 and the tightening ring 10 that presses the spacer 8 in the pushing direction via the sealing material 7 have the same configuration in which the inner cylinder 6 is incorporated, The flexibility of construction work is improved, and both pipes 1, 3
With good workability and can be connected in a retaining state,
In addition, a high sealing performance can be ensured, and a sufficient expansion / contraction allowance E can be ensured.

According to a fourth aspect of the present invention, the first head portion 2 is sealed and slidable in an outer cylinder portion 5 having one end fixed to the second head portion 4, and both head portions are sealed. 2,
A spacer 8 having a sealing material 7, a spacer 8 having a tapered surface 81 on an inner peripheral surface, a retaining ring 9 which is reduced in diameter by being pressed against the tapered surface 81 of the spacer 8, and a spacer via the sealing material 7. Since the tightening ring 10 for pressing the pressing member 8 in the pushing direction is incorporated in the inner cylindrical body 6, both the pipes 1 and 3 can be connected with good workability in a retaining state, and high sealing is achieved. In addition to ensuring the properties, a sufficient expansion / contraction allowance E can be ensured.

(According to claim 5), the first head portion 2 is
The second head part 4 is fixed to the outer cylinder part 5 so as to be sealed and slidable inside the outer cylinder part 5, and the second head part 4 is hung on the insertion end of the other pipe 3 in the direction of retaining. Since the simple structure including the retaining member 15 and the sealing member 16 disposed inside the retaining member 15 can realize a low cost, the both pipes 1 and 3 can be prevented from being removed with good workability. And a high sealing performance can be ensured, and a sufficient expansion / contraction allowance E can be ensured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a cable piping joint of the present invention.

FIG. 2 is a cross-sectional view for explaining a connection operation.

FIG. 3 is a cross-sectional view showing an allowance for expansion and contraction.

FIG. 4 is an enlarged sectional view of a main part.

FIG. 5 is a partially enlarged view of a retaining member.

FIG. 6 is a partially enlarged view of another retaining member.

FIG. 7 is a partially enlarged view of another retaining member.

FIG. 8 is a cross-sectional view showing another embodiment.

FIG. 9 is a cross-sectional view of a pipe connection.

FIG. 10 is a cross-sectional view illustrating an extension allowance.

FIG. 11 is a cross-sectional view showing another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 One piping 2 1st head part 3 The other piping 4 2nd head part 5 Outer cylinder part 6 Inner cylinder 7 Sealing material 8 Spacer 9 Retaining ring 10 Tightening ring 15 Retaining retaining member 16 Sealing material 22 shaft Center gap 63 Extension 81 Tapered surface D _i Inside diameter D _o Outside diameter

Claims (5)

[Claims] 1. A first head part 2 into which one pipe 1 is inserted, a second head part 4 into which the other pipe 3 is inserted, and from the second head part 4 to the first head part 2 side. An outer cylinder portion 5 extending integrally and externally fitted to the first head portion 2 in a sealing manner. The outer cylinder portion 5 is interposed in an axial gap 22 between the pipes 1 and 3. Rutotomoni approximately equal inner diameter and inner diameter of both the pipe 1, 3 D _i, and a gap through wear extensions 63 having an outer diameter D _o following the outer diameter of the other pipe 3,
Wherein the first head portion 2 has an integral shape. 2. A first head portion 2 into which one pipe 1 is inserted, a second head portion 4 into which the other pipe 3 is inserted, and a second head portion 4 from the second head portion 4 to the first head portion 2 side. An outer cylinder portion 5 extending integrally and fitted externally to the first head portion 2 in a sealing manner. The first head portion 2 slidable in the outer cylinder portion 5 is provided with a seal. Material 7 and tapered surface 81 on the inner peripheral surface
A sealing ring 9 that is pressed into contact with the tapered surface 81 of the spacer 8 to reduce its diameter, a fastening ring 10 that presses the spacer 8 in the pushing direction via the sealing material 7, Is incorporated in the inner cylindrical body 6. 3. A first head section 2 into which one pipe 1 is inserted, a second head section 4 into which the other pipe 3 is inserted, and slidable on the first and second head sections 2 and 4. An outer cylinder part 5 fitted externally in a sealed manner, and the first head part 2
And the second head portion 4 includes a sealing member 7, a spacer 8 having a tapered surface 81 on an inner peripheral surface, and a tapered surface 81 of the spacer 8.
A retaining ring 9 that is reduced in diameter by being brought into contact with the body and a tightening ring 10 that presses the spacer 8 in the pushing direction via the sealing material 7 are incorporated in the inner cylindrical body 6. And piping joints for cables. 4. A first head part 2 into which one pipe 1 is inserted, a second head part 4 into which the other pipe 3 is inserted, and the first head part 4 having one end fixed to the second head part 4. An outer cylinder part 5 integrally extended on the one head part 2 side and fitted to the first head part 2 so as to be extendable and contractible, and the first head part 2 and the second head part 4 are provided. , Sealing material 7, spacer 8 having tapered surface 81 on the inner peripheral surface, and tapered surface of spacer 8
It is assumed that a retaining ring 9 that is reduced in diameter by being in contact with 81 and a tightening ring 10 that presses the spacer 8 in the pushing direction via the sealing member 7 are incorporated in the inner cylinder 6. Characteristic pipe joint for cable. 5. A first head section 2 into which one pipe 1 is inserted, a second head section 4 into which the other pipe 3 is inserted, and a second head section 4 from the second head section 4 to the first head section 2 side. An outer cylinder portion 5 extending integrally and fitted externally to the first head portion 2 in a sealing manner. The first head portion 2 slidable in the outer cylinder portion 5 is provided with a seal. Material 7 and tapered surface 81 on the inner peripheral surface
A retaining ring 9 having a diameter that is reduced by being pressed against the tapered surface 81 of the spacer 8, a tightening ring 10 that presses the spacer 8 in the pushing direction via the sealing material 7, And the second head portion 4 fixed to the outer cylinder portion 5, wherein the second head portion 4 is fixed to the insertion end of the other pipe 3 in the direction in which the second head portion 4 is retained. And a seal member 16 provided inside the retaining member 15.