JP2000120925A - Jig for laying piping - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig for laying a piping to facilitate a piping laying work by preventing the occurrence of the damage and buckling of a piping during withdrawing of a piping and carry out a piping laying work with no worker being left entering a box buried in a ground. SOLUTION: A jig 17 for laying a piping consists, in a state to be formed in a curve, of a frame-form body 18 extending in an arcuate state, and a connection cylinder 19 joined to a lower end. The lower end side of the frame-form body 18 is formed in a cylinder state by bundling together in an annular state wire materials 20, and the inner peripheral edges of an annular shape first and second reinforcing plates 21 and 22 are joined with the outer surfaces of the wire materials 20 to fix a shape. On the upper end side extending from the second reinforcing plate 22, the wire materials 20 are bundled in a semiannular shape to be formed in a semicylindrical state, and the inner peripheral edges of a third and fourth reinforcing plates 23 and 24 in a semicircular shape are jointed to each other to fix a shape. The frame-form body 18 is curved in an arcuate shape in the direction of their length by a plurality of the wire materials 20 and a guide passage 25 is formed on the inner surface side thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inserting a pipe into an underground buried path constituted by an underground buried box buried underground and an outer cylinder connecting the underground buried boxes. The present invention relates to a pipe laying jig used in such a case.

[0002]

2. Description of the Related Art Generally, a plurality of underground burial boxes such as manholes and handholes buried in the ground are connected by an outer cylinder, and a plurality of underground burial boxes are connected to each other by an outer cylinder connecting them. The middle buried road is constructed. Wiring such as an optical fiber cable is laid in the underground road, and the wiring is protected by piping such as a sheath pipe. When laying a pipe in an underground passage, first, a pull-in rope is put into the outer cylinder from one underground burying box side. Then, the drawn rope is passed through the outer cylinder and sent out to the other underground buried box side.

[0003] Next, an operator enters the underground box through an upper opening formed in the other underground box, and pulls the ends of a plurality of pipes into the underground box at one time. To the end of the pipe. Then, by pulling back the pulling rope from the one underground buried box side,
Piping is laid in the outer cylinder.

[0004]

However, since the pipe is introduced into the underground box from the upper opening of the underground box and then drawn into the outer cylinder in a bent state, when the pull-in rope is pulled back, It hangs down and crushes, or slides into contact with the periphery of the upper opening of the underground box or the opening of the outer cylinder. For this reason, there has been a problem that the piping is damaged or damaged. Also, since multiple pipes are drawn into the underground box at the same time, when laying pipes, those pipes block the upper opening, and workers who enter the underground box go outside until the end of the work. There was a problem that can not be.

The present invention has been made by focusing on the problems existing in such prior art. The purpose is to prevent damage and buckling of pipes when pulling in pipes, to facilitate pipe laying work, and to keep workers from burying in the underground box. It is an object of the present invention to enable a pipe laying work to be performed.

[0006]

In order to achieve the above object, the invention according to claim 1 has an underground having an upper opening buried in the ground and communicating with the ground, and having a penetrating portion in a side wall. A buried box and an outer cylinder communicating with a through portion of the underground buried box to connect a plurality of buried boxes to form an underground buried path, and to insert a pipe into the underground buried path. A pipe laying jig disposed in an underground burying box, the pipe having a guide having a predetermined length to which the pipe is slid and guided, and a lower end of the guide being an opening of the outer cylinder or In a state in which the guide body is disposed so as to communicate with the penetrating portion of the underground box, at least the vicinity of the lower end in the longitudinal direction is in a state of being curved in an arc shape toward the upper opening direction of the underground box. is there.

According to a second aspect of the present invention, in the first aspect of the present invention, the guide is a frame formed of at least one of a linear member and a plate member. According to a third aspect of the present invention, in the first or second aspect, the guide body has an upper end in a state in which a lower end portion thereof communicates with an opening of an outer cylinder or a penetrating portion of an underground box. The portion is curved so as to face the upper opening of the underground box or to project from the upper opening of the underground box to the ground.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the guide is provided at the lower end of the guide at an opening of an outer cylinder or buried under the ground. A connection portion that can be connected to the through portion of the box is provided.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the connection portion is a connection tube that can be fitted and locked into an opening of an outer cylinder or a through portion of an underground box. According to a sixth aspect of the present invention, in the fourth or fifth aspect of the present invention, the distal end of the connecting portion is notched.

According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, an inner diameter side of the curved portion of the guide is cut off at an upper end side of the guide. Is what it is.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. (First Embodiment) As shown in FIG. 2, an underground box 11 such as a manhole or a handhole is formed in a rectangular box shape from concrete, and an upper opening 12 is formed on the upper surface thereof. In addition, circular through holes 13 as penetrating portions are formed through the side walls at opposing positions of the pair of side walls of the underground box 11. Then, the ground is dug down to a predetermined depth, and the underground burying box 11 is disposed there.

The outer cylinder 14 is formed in a cylindrical shape from concrete or vinyl chloride, and has an outer diameter equal to that of the underground box 11.
Correspond to the inner diameter of the through hole 13. In addition, a plurality of sheath tubes 15 can be inserted into the outer tube 14. The outer tube 14 can be connected to the underground box 11 by fitting the end of the outer tube 14 into the through hole 13 of the underground box 11. As a result, several underground boxes 1
1 and the outer cylinder 14 connecting them, the underground road 1
6 are configured. In addition, the sheath tube 15 made of a synthetic resin as a pipe is formed in a tubular shape, and a wire such as an optical fiber is inserted into the sheath tube 15 to protect it.

As shown in FIG. 1, a pipe laying jig 17 is formed of a frame 18 as a guide formed in an arc shape by a metal material or a synthetic resin material, and is substantially made of a metal material or a synthetic resin material. It is formed in a tubular shape, and is formed into a substantially J-shaped curve by a connecting tube 19 as a connecting portion joined to the lower end of the frame 18.

The lower end of the frame 18 is formed in a cylindrical shape by bundling a plurality of linear members 20 having a slightly arc shape. The lower end of the frame 18 and the outer surface of the linear member 20 located slightly inward therefrom are formed with an annular first reinforcing plate 21 and a second annular reinforcing member 21.
The linear member 20 is fixed to a cylindrical shape by being joined to the inner peripheral edge of the reinforcing plate 22. The outer diameter of the first reinforcing plate 21 is the through hole 13.
Is larger than the inner diameter of

The upper end side of the second reinforcing plate 22 is formed in a semi-cylindrical shape by bundling arc-shaped linear members 20 in a semi-annular shape. The linear material 20 on the upper end side of the frame 18 with respect to the second reinforcing plate 22 and the upper end of the frame 18 is joined to the inner peripheral edges of the third and fourth reinforcing plates 23 and 24 having a semi-annular shape. ing. As a result, the linear material 20 on the upper end side from the second reinforcing plate 22 is fixed in a semi-cylindrical shape. Accordingly, the frame 18 is formed into a circular arc shape in the length direction by the plurality of linear members 20, and a guide path 25 through which the sheath tube 15 can be inserted is formed on the inner surface side. At this time, the inside diameter side of the curved portion is cut out to the upper end side.

The connecting tube 19 has a cylindrical tube portion 19b and a flange portion 1 serving as a locking portion formed at a base end portion of the tube portion 19b by bending so as to be orthogonal to the tube portion 19b.
9a. The outer diameter of the flange portion 19a corresponds to the outer diameter of the first reinforcing plate 21. The inner end surface of the flange portion 19a is joined to the first reinforcing plate 21 to be integrated with the frame 18. Tube portion 19b of connection tube 19
Is formed so as to correspond to the inner diameter of the outer cylinder 14. By fitting the cylindrical portion 19b into the outer cylinder 14, the pipe laying jig 17 can be connected to the outer cylinder 14. It has become. A cutout portion 27 is formed from the distal end portion of the tubular portion 19b of the connecting tube 19 toward the proximal end portion. Therefore, the cylindrical portion 19b is easily fitted into the outer cylinder 14.

As shown in FIG. 3, when the pipe laying jig 17 is arranged in the underground box 11, the upper end of the pipe laying jig 17 is placed in the upper opening 12 of the underground box 11. It is located to face. As a result, the outer cylinder 14 connected to the underground box 11 and the upper opening 12 communicate with each other via the guide path 25 of the piping installation jig 17.

Next, a method of using the pipe laying jig 17 and its operation will be described. First, as shown in FIG. 2, the pull-in rope 28 is inserted into the outer cylinder 14 from one (the left side in FIG. 2) underground burial box 11 a side. Then, the retraction rope 28 is passed through the outer cylinder 14 and the other (FIG. 2)
To the right) (to the right). Further, the pull-in rope 28 is pulled out to the ground from the upper opening 12 of the underground box 11b on the right side.

Next, as shown in FIG. 3, the pull-in rope 28 is inserted from the connection tube 19 side, passed through the frame 18 and inserted into the pipe laying jig 17. And it arrange | positions in the underground burying box 11b so that the upper end part of the piping laying jig 17 may face the upper opening 12 of the right underground burying box 11b,
The tube portion 19b of the connection tube 19 is inserted into the through hole 1 of the underground box 11b.
3 is fitted and locked in the outer cylinder 14 connected to the outer cylinder 3. Further, the outer end surface of the flange portion 19a of the connection tube 19 is
The pipe laying jig 17 is placed in the underground box 11b in contact with the inner wall of the box b.

At this time, since the distal end of the tubular portion 19b of the connecting tube 19 is cut out by the cutout portion 27, the tubular portion 19b can be easily fitted into the outer tube 14. Further, the cylindrical portion 19b is provided with the flange portion 19a and the first reinforcing plate 21.
, The outer end surface of the flange portion 19a contacts the inner wall of the underground box 11b. Therefore, it is possible to prevent the frame-shaped body 18 from entering the inner part of the outer cylinder 14 more than necessary, and to arrange the pipe laying jig 17 at a predetermined position.

Further, the inside diameter side of the curved portion of the frame 18 at the upper end side from the second reinforcing plate 22 is cut off. Therefore, the inside diameter side of the curved portion of the frame 18 is prevented from hitting the lower end edge of the upper opening 12, and the pipe laying jig 17 can be smoothly disposed in the underground box 11b. As a result, the outer cylinder 14 and the upper opening 12 are communicated with each other via the guide path 25 extending in an arc shape of the pipe laying jig 17.

Subsequently, as shown in FIG. 4, the sheath tube 15 is connected to the tip of the pull-in rope 28 pulled out to the ground,
The pull-in rope 28 is pulled back from the left underground buried box 11a side by a winch or the like (not shown). Then, sheath tube 1
5 is a pipe installation jig 17 on a guide path 25 extending in an arc shape.
Are guided in sliding contact from the upper end side to the lower end side, and are drawn into the outer cylinder 14. At this time, since the guide path 25 extends in an arc shape, it is possible to prevent the sheath tube 15 from being drawn into the outer tube 14 in a bent state, from hanging down and buckling. Therefore, the sheath tube 15 can be smoothly drawn into the outer cylinder 14, and the pipe laying operation can be easily performed.

Then, by pulling back the pull-in rope 28 to the left underground box 11a, the sheath tube 15 is
It can be inserted through. As described above, according to the first embodiment, the following effects are exhibited.

(1) Jig 1 for laying piping of this embodiment
According to 7, the tube portion 1 of the connection tube 19 of the pipe laying jig 17 is provided.
When the base 9b is inserted into the outer cylinder 14 and locked and disposed in the underground box 11, the frame 18 is curved in an arc shape so that the other end thereof communicates with the upper opening 12 of the underground box 11. Have been. Then, the outer cylinder 14 and the upper opening 12 are communicated with each other via a guide path 25 extending in an arc shape formed on the inner surface side of the frame 18. Therefore, it is possible to prevent the sheath tube 15 from being buckled by guiding the sheath tube 15 to the guide path 25 and drawing it into the outer cylinder 14. As a result, the sheath tube 15 can be smoothly drawn into the outer tube 14, and the pipe laying operation can be easily performed. In addition, since the pipe laying jig 17 is disposed in the underground box 11 to perform the pipe laying operation, when the sheath tube 15 is pulled into the outer cylinder 14, the operator needs to install the pipe laying jig 17 in the underground box 11. You can work without entering.

(2) Piping Installation Jig 1 of First Embodiment
According to 7, the frame 18 is configured by assembling a plurality of linear members 20 with a first reinforcing plate 21, a second reinforcing plate 22, a third reinforcing plate 23, and a fourth reinforcing plate 24. Therefore, it is possible to reduce the weight of the pipe laying jig 17, and to reduce the labor required for transportation and construction.

(3) Jig 1 for laying piping according to the first embodiment
According to 7, when the pipe laying jig 17 is disposed in the underground box 11, the upper end thereof is located at the upper opening 1 of the underground box 11.
2 is coming. Therefore, the sheath tube 15 can be easily placed on the guide path 25 of the pipe laying jig 17, and the sheath tube 15 hangs down from the upper opening 12 and the upper end of the pipe laying jig 17 to buckle. By doing so, the pipe laying work can be easily performed.

(4) Jig 1 for laying piping according to the first embodiment
According to 7, a connecting tube 19 is provided at the lower end of the pipe laying jig 17 as a connecting portion connectable to the outer tube 14. Therefore, by connecting the connection tube 19 to the outer tube 14, the pipe laying jig 17 can be reliably disposed at a predetermined position of the underground box 11.

(5) Piping installation jig 1 of first embodiment
According to 7, the connecting tube 19 is provided at the lower end of the pipe laying jig 17.
The outer diameter of the cylindrical portion 19 b corresponds to the inner diameter of the outer cylinder 14. Therefore, the pipe laying jig 17 can be easily connected to the underground box 11 by fitting the tube portion 19 b of the connection tube 19 into the outer tube 14.

(6) Jig 1 for laying piping according to the first embodiment
According to 7, since the distal end of the cylindrical portion 19b of the connecting cylinder 19 is cut out by the cutout portion 27, the distal end of the cylindrical portion 19b is prevented from hitting the inner peripheral edge of the outer cylinder 14 during the connection work. It can be easily fitted into the outer cylinder 14.

(7) Piping Installation Jig 1 of First Embodiment
According to FIG. 7, the cylindrical portion 19b of the connection tube 19 is
a and the first reinforcing plate 21, and the outer diameter of the flange portion 19 a is formed larger than the inner diameter of the through hole 13. Therefore, when the pipe laying jig 17 is provided by fitting the tubular portion 19 b of the connecting tube 19 into the outer tube 14 and arranging the pipe laying jig 17, the outer end surface of the flange portion 19 a contacts the inner wall of the underground box 11. Therefore, it is possible to prevent the frame-shaped body 18 from entering the inner part of the outer cylinder 14 more than necessary, and to arrange the pipe laying jig 17 at a predetermined position.

(8) Jig 1 for laying piping according to the first embodiment
According to 7, the inside diameter side of the curved portion of the frame-shaped body 18 at the upper end side from the second reinforcing plate 22 is cut out to form a semi-cylindrical shape. Therefore, when disposing the pipe laying jig 17 in the underground box 11, the inside diameter side of the curved portion of the frame 18 is prevented from hitting the lower edge of the upper opening 12 of the underground box 11, The pipe laying jig 17 can be smoothly arranged in the underground box 11.

(Second Embodiment) In the second embodiment, differences from the first embodiment will be mainly described. FIG.
As shown in FIG. 7, the frame 18 as a guide of the pipe laying jig 17 of the second embodiment is formed by bundling a linear material 20 having an arc shape longer than that of the first embodiment into a substantially cylindrical shape. It is formed in a shape. In addition, the linear material 2 formed in a substantially cylindrical shape
Numeral 0 is joined and fixed to the inner peripheral edges of six annular reinforcing plates 30 arranged at predetermined intervals. The frame 18 is formed in a substantially U-shape, and its bending condition is the first shape.
It is larger than in the case of the embodiment.

As shown in FIG. 6, the tube portion 19b of the connection tube 19 of the pipe laying jig 17 of the second embodiment is fitted and locked in the outer tube 14 and disposed in the underground box 11. In this case, the upper end of the frame 18 protrudes from the upper opening 12 of the underground box 11.

That is, the pipe laying jig 17 of the second embodiment is used.
Is formed in a cylindrical shape in the entire length direction, and the underground buried box 11
When disposed in the underground box 11, the upper end of the frame 18
Project from the upper opening 12 of the vehicle.
Therefore, when the sheath tube 15 is placed in the guide path 25 and pulled into the outer cylinder 14, the outer surface of the sheath tube 15 is protected by the frame 18. Therefore, it is possible to prevent the sheath tube 15 from slidingly contacting the opening edge or the lower end edge of the upper opening 12 and prevent the sheath tube 15 from being damaged.

As shown in FIG. 6, the U-shaped pipe laying jig 17 is different from the J-shaped first embodiment in that the upper end and the lower end are located in the same direction. Therefore, there is a wall 29 near the underground box 11 and the sheath tube 15
Can be dealt with even when the derivation direction is restricted.

The above embodiment can be embodied with the following modifications. In each embodiment, as shown in FIG. 7, a flexible guide tube 31 having a predetermined length and formed in a cylindrical shape.
The sheath tube 15 is inserted through the inside. Next, a scaffold 32 is placed and fixed near the upper opening 12 of the other underground box 11b, and one end of the guide tube 31 into which the sheath tube 15 has been inserted is fixed to the scaffold 32. Then, the sheath tube 15 may be guided on the guide path 25 of the piping installation jig 17 through the guide tube 31, and the sheath tube 15 may be installed in the outer cylinder 14.

In the case of such a configuration, first, the other end of the guide tube 31 into which the sheath tube 15 is inserted is inserted into the piping installation jig 17. Next, the sheath tube 15 is connected to the tip of the pull-in rope 28 pulled out to the ground, and pulled back by a winch or the like in the direction of one underground buried box 11a (not shown).
Then, as the sheath tube 15 moves, the guide tube 31 inserted through the sheath tube 15 and the pipe laying jig 17 inserted through the guide tube 31 are drawn into the underground box 11b, and the connection tube 19 The portion 19b is fitted and locked in the outer cylinder 14.

In this state, the pipe laying jig 17
Is disposed in the underground box 11b so that the upper end thereof faces the upper opening 12 of the underground box 11b. It is drawn into the outer cylinder 14 via the upper part. At this time,
Since the guide tube 31 has a predetermined length and one end is fixed to the scaffold 32, the other end of the guide tube 31 is slightly more than the opening of the outer cylinder 14 connected to the other underground box 11b. It is located in the inner part. Further, when the retracting rope 28 is pulled back in the direction of the one underground burying box 11a, the guide tube 31 is not further retracted, and only the sheath tube 15 is retracted into the outer cylinder 14 through the guide tube 31 and the one underground burying is performed. It is pulled back toward the box 11a. As a result, the sheath tube 15 can be laid in the outer cylinder 14.

Accordingly, the guide tube 31 is guided by the guide path 25 extending in an arc shape and is drawn into the outer cylinder 14, thereby preventing the guide tube 31 from buckling. As a result, it is possible to reliably prevent the sheath tube 15 that passes through the guide tube 31 and is drawn into the outer tube 14 from buckling.
Further, the sheath tube 15 is prevented from slidingly contacting the opening edge of the upper opening 12, the guide path 25 of the pipe laying jig 17 and the opening edge of the outer cylinder 14, thereby preventing the outer surface of the sheath tube 15 from being damaged. It can be further prevented.

The pipe laying jig 17 may be used when laying wiring such as an optical fiber cable in the outer cylinder 14. Also in this case, the guide path 2 extending in an arc shape
5, the wiring can be smoothly drawn into the outer cylinder 14, and the work can be easily performed.

In the first embodiment, when the pipe laying jig 17 is arranged in the underground box 11, the frame 18
May be curved toward the upper opening 12 of the underground box 11 only in the vicinity of the lower end of the underground box 11, and the upper end side may be linearly formed so as to face the upper opening 12 of the underground box 11 from the curved portion. Good. Even in the case of such a configuration, it is possible to configure a guide path 25 that communicates the outer cylinder 14 and the upper opening 12 of the underground box 11, and it is possible to easily guide the sheath tube 15 into the outer cylinder 14. .

In each embodiment, the cross section of the frame 18 extending in an arc shape by a synthetic resin plate, a metal plate or the like is cylindrical.
It may be formed in a U-shaped, channel-shaped, V-shaped or the like guide. Even in the case of such a configuration, the guideway 25 is provided on the inner surface side.
And the sheath tube 15 can be easily guided into the outer cylinder 14.

In the first embodiment, the second reinforcing plate 2
The upper end side from 2 may be formed in a cylindrical shape. With such a configuration, the same effects as those of (1) to (7) can be obtained.

In each embodiment, even if a plurality of linear members 20 are bundled in an annular or semi-annular shape to form a frame, and the separate linear members 20 are joined and their shapes are fixed. Good. With such a configuration, the weight of the piping installation jig 17 can be reduced.

In each embodiment, the notch 27 at the tip of the tubular portion 19b of the connecting tube 19 may be omitted to form a tube. Even in the case of such a configuration, the connecting cylinder 19
By fitting the cylindrical portion 19b into the outer cylinder 14, the pipe laying jig 17 can be connected to the underground box 11.

In the first embodiment, when the pipe laying jig 17 is arranged in the underground box 11, the frame 18
May be formed in a tapered shape so that the upper end side of the second reinforcing plate 22 does not contact the lower end edge of the upper opening 12 of the underground box 11. In the case of such a configuration, the pipe laying jig 17
Is installed in the underground box 11, the second
The upper end side of the reinforcing plate 22 is the upper opening 12 of the underground box 11.
To prevent it from touching the lower edge of the
1 can be arranged.

When the pipe laying jig 17 of the first embodiment is disposed in the underground box 11, the jig 17 may be formed so that its upper end protrudes from the upper opening 12 of the underground box 11. Good. In the case of such a configuration, the pipe laying jig 17
The sheath tube 15 can be easily mounted on the guide path 25 of the above.

In each embodiment, the connection tube 19 is omitted, and a bolt hole is formed in the first reinforcing plate 21. further,
Holes corresponding to the bolt holes are formed in the inner wall of the underground box 11. Then, the pipe laying jig 17 is moved to the underground box 11.
In the first reinforcement plate 21 and the underground box 1
The piping installation jig 17 may be fixed to the underground box 11 by making the holes correspond to each other and inserting bolts. Also in this configuration, the pipe laying jig 17 can be disposed in the underground burying box 11, and the sheath pipe 15 is connected to the guide path 2.
5, the sheath tube 15 can be laid in the outer cylinder 14. Further, when the sheath tube 15 is pulled into the outer cylinder 14, the worker can work without entering the underground box 11.

In each embodiment, the flange 19 a of the connection tube 19 may be omitted, and the base end of the tube 19 b of the connection tube 19 may be joined so as to be orthogonal to the first reinforcing plate 21. . In such a configuration, when the tubular portion 19b of the connecting tube 19 is fitted into the outer tube 14, the outer end surface of the first reinforcing plate 21 contacts the inner wall of the underground box 11. as a result,
The first reinforcing plate 21 acts as a locking portion to prevent the frame-shaped body 18 from entering the inner portion of the outer cylinder 14 more than necessary, and to arrange the pipe laying jig 17 at a predetermined position. it can.

In each embodiment, the end of the outer cylinder 14 is joined to the outer wall of the underground box 11 so that the opening of the outer cylinder 14 and the through hole 13 of the underground box 11 communicate with each other. 1
9 may be fitted into the outer cylinder 14 through the through-hole 13. Also in this configuration, the pipe laying jig 17 can be disposed at a predetermined position in the underground box 11.

In each embodiment, the underground box 11
May be formed by cutting out the penetrating portion from the upper part of the side wall. Also in this case, the outer cylinder 14 can be connected to the underground box 11.

Further, technical ideas other than the inventions described in the claims grasped from the embodiment will be described below together with their effects. The guide body is configured by bundling a plurality of arc-shaped linear materials in a frame shape and joining an outer surface thereof to an inner peripheral edge of a plurality of annular or semi-annular plate-like materials. The jig for piping installation according to any one of claims 1 to 7. With this configuration, the weight of the guide body can be reduced. Further, the curved shape of the guide can be maintained.

In the invention according to any one of claims 1 to 7, the lower end of the guide body may be in communication with an opening of an outer cylinder or a penetrating portion of an underground box.
A pipe laying jig provided with a locking portion that abuts and locks on a side wall of an underground box. In such a configuration, when the lower end portion of the guide body is fitted and locked in the outer cylinder and the pipe laying jig is provided, the outer end surface of the locking portion contacts the side wall of the underground box. Therefore, it is possible to prevent the guide body from entering the inner part of the outer cylinder more than necessary, and to arrange the pipe laying jig at a predetermined position.

[0054]

According to the first aspect of the present invention, the pipe laying work can be easily performed by preventing the pipe from being damaged or buckled when the pipe is pulled in, and the worker can bury the pipe underground. Piping work can be performed without staying in the box.

According to the invention described in claim 2, according to claim 1,
In addition to the effects of the invention described in (1), the weight of the jig for laying piping can be reduced, and labor during transportation and construction can be reduced.

According to the invention described in claim 3, according to claim 1
Or, in addition to the effect of the invention according to claim 2, when the upper end of the pipe laying jig faces the upper opening of the underground burying box, the pipe can be easily inserted into the guide path of the pipe laying jig. The pipe can be placed on the pipe, preventing the pipe from hanging down and buckling from between the upper opening and the other end of the pipe laying jig, thereby facilitating the pipe laying operation. In addition, when the pipe laying jig projects from the upper opening of the underground box to the ground,
The pipe can be prevented from slidingly contacting the opening edge or the lower edge of the upper opening, and the pipe can be more reliably prevented from being damaged. Also, since the upper end and lower end of the pipe laying jig are located in the same direction, there is a wall etc. near the underground box,
It is also possible to cope with a case where the direction in which the pipe is led is restricted.

According to the invention set forth in claim 4, according to claim 1,
In addition to the effects of the invention described in any one of (1) to (3), by connecting the connection portion to the outer cylinder, the jig for laying the pipe can be securely arranged at a predetermined position of the underground box. .

According to the invention described in claim 5, according to claim 4
In addition to the effects of the invention described in (1), by fitting the connection cylinder into the outer cylinder, the pipe laying jig can be easily connected to the underground box.

According to the invention set forth in claim 6, according to claim 5,
In addition to the effects of the invention described in (1), since the distal end of the connecting cylinder is cut out by the notch, the distal end of the connecting cylinder is prevented from hitting the inner end of the outer cylinder, and easily fitted into the outer cylinder. can do.

According to the invention of claim 7, according to claim 1,
In addition to the effect of the invention according to any one of the above-described items 6, when the pipe laying jig is disposed in the underground box, the guide body may hit the lower edge of the upper opening of the underground box. Prevent,
The pipe laying jig can be smoothly disposed in the underground box.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a piping installation jig according to a first embodiment.

FIG. 2 is a sectional view showing a state in which a pull-in rope is inserted into an underground road.

FIG. 3 is a partial cross-sectional view showing a state in which a pipe laying jig is disposed in an underground box.

FIG. 4 is a partial cross-sectional view showing a state in which a sheath tube has been inserted into an outer cylinder from a piping installation jig.

FIG. 5 is a perspective view showing a pipe laying jig according to a second embodiment.

FIG. 6 is a partial cross-sectional view illustrating a usage state of a piping installation jig according to a second embodiment.

FIG. 7 is a partial cross-sectional view showing another example of the embodiment.

[Explanation of symbols]

Reference numeral 11: an underground box, 12: an upper opening, 13: a through hole as a penetrating portion, 14: an outer cylinder, 15: a sheath tube as a pipe,
6 ... Underground road, 17 ... Piping installation jig, 18 ... Frame-shaped body as guide body, 19 ... Connection cylinder as connection part, 20 ...
Linear member, 21: first reinforcing plate as a plate member, 22: second reinforcing plate as a plate member, 23: third reinforcing plate as a plate member, 24: fourth reinforcement as a plate member Plate, 27: Notch, 30: Reinforcement plate as plate-like material.

Claims (7)

[Claims] 1. An underground burying box having an upper opening buried in the ground and communicating with the ground and having a through portion in a side wall, and a plurality of underground burying boxes communicating with the through portion of the underground burying box. A jig for pipe laying which is disposed in an underground burial box for inserting a pipe into the underground buried path with an outer cylinder connecting the pipes, wherein the pipe is It has a guide body of a predetermined length that is slid and guided, and in a state where the lower end of the guide body is disposed so as to communicate with the opening of the outer cylinder or the penetrating part of the underground box, the guide body is A pipe laying jig in which at least a portion near a lower end in a length direction is curved in an arc shape toward an upper opening direction of an underground box. 2. The jig for laying a pipe according to claim 1, wherein the guide is a frame formed of at least one of a wire and a plate. 3. The guide body has a lower end communicating with an opening of the outer cylinder or a penetrating portion of the underground box, with an upper end facing the upper opening of the underground box, or underground. The piping installation jig according to claim 1, wherein the jig is formed so as to protrude from the upper opening of the buried box to the ground. 4. A connecting part capable of connecting the guide to an opening of an outer cylinder or a penetrating part of an underground box is provided at a lower end of the guide. The jig for laying piping according to claim 1. 5. The pipe laying jig according to claim 4, wherein the connection portion is a connection tube that can be fitted and locked in an opening of an outer cylinder or a penetration portion of an underground box. 6. The pipe laying jig according to claim 4, wherein a tip portion of the connection portion is cut off. 7. The pipe laying jig according to claim 1, wherein an inner diameter side of the curved portion of the guide body is cut off at an upper end side of the guide body.