JP2022035011A - Joint member for buried pipe in precast concrete wall and use thereof - Google Patents

Abstract

An object of the present invention is to easily connect buried pipes to each other even when the distance between the ends of buried pipes in a pair of adjacent precast concrete walls is limited. [Solution] A joint member 30 for a pipe buried in a precast concrete wall, a first precast concrete wall 2 in which a first buried pipe 4 is buried, and a second precast concrete wall 2' in which a second buried pipe 4' is buried. After preparing the joint pipe 6, insert the compression coil spring 7 into the second enlarged diameter end 22 so that it is accommodated, and prevent it from coming out, and then connect the first protruding end 10 and the second enlarged diameter end 22. The first precast concrete wall 2 and the second precast concrete wall 2' are lined up so that they are in opposing positions, and the joint pipe 6 that has been prevented from coming off is released and the second precast concrete wall 2 is pushed back by the compression coil spring 7. The first protruding end 10 and the second enlarged diameter end 22 are connected. [Selection diagram] Figure 1

Description

The present invention relates to a joint member of a buried pipe in a precast concrete wall for connecting a buried pipe buried inside the precast concrete wall and a method of using the joint member.

Conventionally, it has been known to bury a communication pipe or the like for storing a cable inside a concrete wall balustrade of a highway or the like.

For example, as in Patent Document 1, there is known a buried structure that can be suitably used for a transport pipe for utilities such as water supply for ships buried in a quay in a port facility, which is a transport pipe buried in concrete. ing. In this buried structure, the transport pipe joint is located at the concrete expansion joint, the expansion pipe is interposed at the transport pipe joint, and the outer pipe covering the expansion pipe is arranged on one transport pipe side. A sliding pipe that fits outside the outer diameter and is slidable in the axial direction of the outer pipe is arranged on the other transport pipe side, and the transport pipe is embedded in the concrete.

Further, as in Patent Document 2, when laying power / communication lines such as power cables, telephone lines, CATV cables and cable broadcasting cables protected by cable protection pipes, buffers such as bridges and highway bridges are buffered. It is known that a cable protection pipe is connected by using a pipe joint having a specific shape. The connection structure of this cable protection tube is composed of a bellows tube having receiving ports of the cable protection tube at both ends and a cover member fixed to the cable protection tube to protect the outer periphery of the bellows tube. Are opposed to each other around the outer center of the bellows tube at a required interval, and the other end is formed of a pair of left and right tubular members that engage with the cable protection tube, and a connecting member located on the tip side of each tubular member. Except for the attachment portion with and, it is embedded in the balustrade, and the opposing tubular members are integrally connected by a flexible connecting member.

Further, as in Patent Document 3, another precast wall orthogonal to the bridge axis of the deck and joined to the side end portion in the direction parallel to the bridge surface via the ground cover and adjacent to the bridge axis direction. Precast wall balustrade members that are joined to balustrade members are known. This precast wall balustrade member is arranged above the ground cover, and a joint material such as a non-shrink mortar is arranged between both concrete portions. The precast wall balustrade member is moved above the position where it should be placed by a crane or the like, and the first longitudinal anchoring muscle and the second longitudinal anchoring muscle are received in the receiving hole, and the adjacent precast wall already installed in the receiving groove. The precast wall balustrade member is lowered and placed in a predetermined position so that the lateral fixing bar of the balustrade member is received.

Japanese Unexamined Patent Publication No. 62-147192 Japanese Patent No. 3834769 Japanese Unexamined Patent Publication No. 2018-141341

However, if the distance between the ends of the buried pipes of the pair of adjacent precast concrete walls cannot be increased, there is a problem that it is difficult to connect the joint members connecting them.

The present invention has been made in view of this point, and an object thereof is easily made even when the distance between the buried pipe ends of a pair of adjacent precast concrete walls is limited. The purpose is to make it possible to connect buried pipes to each other.

In order to achieve the above object, in the present invention, the joint pipe and the urging member are held in the second enlarged diameter end portion and are held in place between the first precast concrete wall and the second precast concrete wall. After arranging, it was opened, and a pair of buried pipes were connected by a joint pipe pushed by an urging member.

Specifically, in the first invention, the joint member of the buried pipe in the precast concrete wall connecting the buried pipes buried inside the pair of precast concrete walls is targeted.
The above joint member
Formed on the side surface side of the first precast concrete wall in the first protruding end of the first buried pipe buried in one first precast concrete wall and the second buried pipe buried in the other second precast concrete wall. A tubular joint pipe whose both ends are connected to the second expanded end of the concrete,
The second enlarged diameter end is provided with a cylindrical urging member that can accommodate the entire diameter.
The above joint pipe
The enlarged diameter tip connected to the first protruding end and
Including a small-diameter base end having an outer diameter smaller than that of the enlarged-diameter tip, which is inserted into the second-diameter-expanded end.
With the urging member pushed in and at least a part of the joint pipe is housed in the second enlarged diameter end portion, it can be inserted between the first protruding end portion and the second enlarged diameter end portion. In addition, both ends of the joint pipe are configured to be connectable to the first protruding end portion and the second enlarged diameter end portion, respectively, in a state of being pushed back by the urging member.

According to the above configuration, even when the distance between the buried pipe ends of the pair of precast concrete walls is short, the joint pipe and the urging member are installed in the second enlarged diameter end to increase the protrusion amount of the joint pipe. In the reduced state, the joint pipe can be arranged between the first protruding end portion and the second enlarged diameter end portion. After that, when the joint pipe is released from the retaining state, the joint pipe moves toward the first protruding end portion by the urging force of the urging member, so that both ends of the joint pipe are the first protruding end portion and the second enlarged diameter end, respectively. Connected to the unit. This ensures that the pair of buried pipes are connected. Further, by reducing the diameter of the small diameter base end portion side, the inner diameter of the second enlarged diameter end portion can be suppressed. Since the inner diameter of the enlarged diameter tip portion may be formed according to the outer diameter of the first protruding end portion, it is easy to correspond to the shape of the buried pipe.

In the second invention, in the first invention,
A part of the second enlarged diameter end portion protrudes from the side surface of the second precast concrete wall, and a fixing screw for fixing the joint pipe in a state where the urging member is pushed into the protruding portion is screwed. Has screw holes.

According to the above configuration, a screw hole may be formed in an easily accessible portion of the protruding portion of the second enlarged diameter end portion, and the fixing screw can be easily fastened.

In the third invention, in the first invention,
Further, a plate-shaped retaining member for preventing the joint pipe from coming off from the first protruding end portion side of the joint pipe in a state of being pushed into the second enlarged diameter end portion is provided.

According to the above configuration, it is advantageous in that one retaining member can be used, especially when a plurality of joint pipes arranged side by side are released from the state of being prevented from coming off.

In the fourth invention, the joint member of the precast concrete wall-embedded pipe of any one of the first to third inventions is used.
Prepare a first precast concrete wall in which the first buried pipe is buried and a second precast concrete wall in which the second buried pipe is buried.
The joint pipe is inserted into the second enlarged diameter end portion by pushing the urging member so as to accommodate the joint pipe, and then the joint pipe is prevented from coming off.
The first precast concrete wall and the second precast concrete wall are arranged side by side so that the first protruding end portion and the second enlarged diameter end portion face each other.
The first protruding end portion and the second enlarged diameter end portion are connected in a state where the joint pipe that has been prevented from coming off is opened and pushed back to the urging member.

According to the above configuration, even when the distance between the buried pipe ends of the pair of precast concrete walls is short, the joint pipe and the urging member are installed in the second enlarged diameter end to increase the protrusion amount of the joint pipe. In the reduced state, the joint pipe can be arranged between the first protruding end portion and the second enlarged diameter end portion. After that, when the joint pipe is released from the retaining state, the joint pipe moves toward the first protruding end portion by the urging force of the urging member, so that both ends of the joint pipe are the first protruding end portion and the second enlarged diameter end, respectively. Connected to the unit. This ensures that the pair of buried pipes are connected.

In the fifth invention, the joint member of the precast concrete wall-embedded pipe of the second invention and
Prepare a first precast concrete wall in which the first buried pipe is buried and a second precast concrete wall in which the second buried pipe is buried.
With the joint pipe pushed into the urging member and fully accommodated in the second diameter-expanded end, it is inserted into the second-diameter end and a fixing screw is fastened to the screw hole to prevent it from coming off. death,
The first precast concrete wall and the second precast concrete wall are arranged side by side so that the first protruding end portion and the second enlarged diameter end portion face each other.
The structure is such that the first protruding end portion and the second enlarged diameter end portion are connected in a state where the fixing screw is loosened, the joint pipe that has been prevented from coming off is opened, and the joint pipe is pushed back to the urging member.

According to the above configuration, even when the distance between the buried pipe ends of the pair of precast concrete walls is short, the joint pipe and the urging member are installed in the second enlarged diameter end to increase the protrusion amount of the joint pipe. In the reduced state, the joint pipe can be arranged between the first protruding end portion and the second enlarged diameter end portion. After that, the joint pipe can be easily prevented from coming off with the fixing screw. In addition, the joint pipe can be released from the retaining state simply by loosening the fixing screw, and then the joint pipe moves to the first protruding end side by the urging force of the urging member, so that both ends of the joint pipe are respectively. It is connected to the first protruding end and the second expanded end. This ensures that the pair of buried pipes are connected.

In the sixth invention, the joint member of the precast concrete wall-embedded pipe of the third invention and
Prepare a first precast concrete wall in which the first buried pipe is buried and a second precast concrete wall in which the second buried pipe is buried.
The joint pipe is inserted into the second diameter-expanded end portion in a state where the urging member is pushed in and the whole is accommodated in the second diameter-expanded end portion, and the first one of the joint pipe is inserted by the retaining member. Prevent it from coming off from the protruding end side,
The first precast concrete wall and the second precast concrete wall are arranged side by side so that the first protruding end portion and the second enlarged diameter end portion face each other.
The configuration is such that the first protruding end portion and the second enlarged diameter end portion are connected in a state where the retaining member is removed, the joint pipe that has been prevented from coming off is opened, and the joint pipe is pushed back to the urging member. ..

According to the above configuration, even when the distance between the buried pipe ends of the pair of precast concrete walls is short, the joint pipe and the urging member are installed in the second enlarged diameter end to increase the protrusion amount of the joint pipe. In the reduced state, the joint pipe can be arranged between the first protruding end portion and the second enlarged diameter end portion. After that, since it is only necessary to dispose a plate-shaped retaining member in front of the joint pipe, even a plurality of joint pipes can be easily prevented from coming off. Further, since the joint pipe can be released from the retaining state only by removing the retaining member in front of the joint pipe, it is possible to easily release a plurality of joint pipes arranged side by side. By opening the joint pipe, the joint pipe moves toward the first protruding end portion by the urging force of the urging member, so that both ends of the joint pipe are connected to the first protruding end portion and the second enlarged diameter end portion, respectively. This ensures that the pair of buried pipes are connected.

As described above, according to the present invention, since one end of the urging member and the joint pipe can be pushed and accommodated in the second enlarged diameter end portion, the space between the buried pipe ends of the adjacent pair of precast concrete walls can be accommodated. Buried pipes can be easily connected to each other even in a narrow range such as a limited distance.

It is an exploded sectional view which shows the joint pipe connection process of the precast concrete wall which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the joint pipe attachment process of the precast concrete wall which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the joint structure including the joint member of the precast concrete wall buried pipe which concerns on Embodiment 1 of this invention. The precast concrete wall according to the first embodiment of the present invention is shown, (a) shows the side surface on the first protruding end side, and (b) shows the side surface on the second end side. It is sectional drawing corresponding to FIG. 2 which concerns on Embodiment 2 of this invention. FIG. 2 is a cross-sectional view corresponding to FIG. 2 according to a modified example of the second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
-Structure of joint structure-
FIG. 3 shows a joint structure 1 including a joint member 30 of the buried pipes in the precast concrete wall connecting the buried pipes 4 and 4'embedded in the pair of precast concrete walls 2 and 2'. The precast concrete walls 2, 2'and the buried pipes 4, 4'have basically the same shape as a whole as shown in FIG. 3, but as shown in FIG. 1, attention is paid to one joint surface. When I did, I changed the name to make it easier to understand. The joint member 30 of the precast concrete wall-embedded pipe in the present embodiment includes a joint pipe 6 and a compression coil spring 7, which will be described later.

For example, as shown in FIG. 4, the precast concrete walls 2 and 2'have, for example, a height of about 900 mm, a width (thickness) of about 250 to 450 mm, and a length of about 2 to 3 m. As will be described in detail later, a large number of precast concrete walls 2, 2'are manufactured in a state where the first and second buried pipes 4, 4'and the like are embedded in the precast concrete walls 2, 2', and the site is used. A large number of precast concrete walls 2, 2'are connected using a crane or the like. The first and second buried pipes 4, 4'are made of, for example, a general-purpose rigid vinyl chloride conduit. In this embodiment, the first and second buried pipes 4, 4'to be buried inside a balustrade such as an expressway are targeted.

As shown in an enlarged manner in FIGS. 1 and 2, in one of the first precast concrete walls 2, the first protruding end portion 10 at the tip of the first buried pipe 4 embedded therein protrudes from the side surface by a predetermined length. There is. The first protruding end portion 10 may be bonded and connected to the first buried pipe 4 by a socket 13 as shown in the figure, or may be composed of the end portion itself of the first buried pipe 4.

At the end of the second buried pipe 4'embedded inside the other second precast concrete wall 2', a cylindrical second buried pipe connecting portion 20 bonded and connected to this end by a socket 13 is provided. It is connected. The second buried pipe connecting portion 20 has, for example, a second expanded end portion 22 having an enlarged diameter on the tip side and a straight tubular second base end portion 21 to which the second buried pipe 4'is connected. The second buried pipe connecting portion 20 is made of a resin molded product such as hard vinyl chloride. The inner diameters of the first protruding end portion 10 and the second base end portion 21 are slightly larger than the outer diameters of the buried pipes 4 and 4', and the buried pipes are embedded in the first protruding end portion 10 and the second base end portion 21. You may insert 4, 4'respectively.

As shown in FIG. 1, the joint member 30 has a first precast end portion 10 of a first buried pipe 4 embedded in one first precast concrete wall 2 and a first precast in the other second buried pipe 4'. It has a tubular joint pipe 6 whose both ends are connected to a second enlarged diameter end portion 22 formed on the side surface side of the concrete wall 2. The joint pipe 6 is made of, for example, a cylindrical resin molded product, and one end thereof can be accommodated inside the second enlarged diameter end portion 22. Specifically, the joint pipe 6 has an outer diameter smaller than that of the enlarged diameter tip portion 6a connected to the first protruding end portion 10 and the enlarged diameter tip portion 6a inserted into the second enlarged diameter end portion 22. Includes a small diameter base end portion 6b having.

A water-expandable nonwoven fabric 8 that expands when water is contained is wound around the outer circumference of the small-diameter base end portion 6b and the inner circumference of the enlarged-diameter tip portion 6a of the joint pipe 6. Therefore, after connecting the first protruding end portion 10 and the second enlarged diameter end portion 22 with the joint pipe 6, when the mortar 3 as a filler is filled, the water-expandable nonwoven fabric 8 swells due to the moisture of the mortar 3. The mortar 3 is securely sealed with and prevents the mortar 3 from flowing into the first and second buried pipes 4, 4'. The water-expandable nonwoven fabric 8 may be a sealing member having no water-expanding function and simply having watertightness. The water-expandable nonwoven fabric 8 may be provided not on the joint pipe 6 side but on the outer circumference of the first protruding end portion 10 or the inner circumference of the second enlarged diameter end portion 22. A chamfer may be provided on the inner surface of the small-diameter base end portion 6b of the joint pipe 6, and in this case, when the electric wire or the like is passed through, the electric wire or the like is less likely to be caught by the joint pipe 6 and can be smoothly inserted.

Further, the joint member 30 is provided with a cylindrical compression coil spring 7 that can accommodate the entire joint member 30 at the second enlarged diameter end portion 22. The compression coil spring 7 is made of, for example, a stainless steel wire for a spring. The compression coil spring 7 may be made of a rust-preventive coated steel wire for a spring. As shown in FIG. 2, the compression coil spring 7 has a size that fits inside the second expanded end portion 22 together with the small diameter base end portion 6b of the joint pipe 6 in a compressed state in contact with the tapered portion. Therefore, it is desirable to have a smooth inner peripheral surface so that cables and the like will not be caught after burying. The outer diameter of the compression coil spring 7 is slightly smaller than the inner diameter of the second expanded end portion 22 and larger than the inner diameter of the small diameter base end portion 6b of the joint pipe 6 so that the compression coil spring 7 can exert its function.

A cylindrical cover having a smooth inner surface may be provided inside the compression coil spring 7. Further, the compression coil spring 7 may be wrapped in a tubular vinyl or a film so that the compression coil spring 7 can be expanded and contracted together with the compression coil spring 7. In either case, the electric wire or the like is less likely to be caught on the inner peripheral surface of the compression coil spring 7 when the electric wire or the like is passed through the wire.

As described above, as shown in FIG. 1, the joint member 30 of the present embodiment has a first protruding end in a state where the joint pipe 6 pushes the compression coil spring 7 and one end is accommodated in the second enlarged diameter end portion 22. As shown in FIG. 2, both ends of the joint pipe 6 which can be inserted between the portion 10 and the second enlarged diameter end portion 22 and is pushed back to the compression coil spring 7 are the first protruding end portion 10 and the first protruding end portion 22, respectively. 2 It is configured to be connectable to the enlarged diameter end portion 22.

As shown in FIG. 3, in the joint structure 1 having the joint member 30 of the precast concrete wall-embedded pipe of the present embodiment, the first protruding end portion 10 of the first buried pipe 4 and the second of the second buried pipe 4' With the joint pipe 6 connected to the enlarged diameter end portion 22, the joint portion between the side surface of the first precast concrete wall 2 and the side surface of the second precast concrete wall 2'is filled with mortar 3 as a filler. Has been done.

-How to use the joint structure-
Next, a method of using the joint member 30 of the precast concrete wall-embedded pipe will be described.

In the preparation step, the above-mentioned first and second buried pipes 4, 4', the first protruding end portion 10, the second buried pipe connecting portion 20, the joint pipe 6, and the like are prepared.

First, in the formwork assembly process, for example, a wooden formwork is placed in a factory or the like.

Next, in the reinforcing bar assembly step, rod-shaped and annular reinforcing bars 51 are arranged in the formwork.

Next, as shown in FIG. 3, in the buried pipe installation step, the first buried pipe 4 to which the first protruding end portion 10 is connected by the socket 13 is placed in the formwork of the first precast concrete wall 2 by the socket 13. 2 The second buried pipe 4'to which the buried pipe connecting portion 20 is connected is arranged in the second precast concrete wall 2', respectively.

Then, in the concrete placing process, concrete is placed in the formwork.

Next, in the formwork release step, the formwork is released to complete the first and second precast concrete walls 2, 2'.

Many of these precast concrete walls 2, 2'are manufactured and transported to construction sites such as highways.

Next, as shown in FIG. 2, in the joint pipe mounting step, the compression coil spring 7 is pushed in by the small diameter base end portion 6b of the joint pipe 6, and the entire small diameter base end is accommodated in the second diameter expansion end portion 22. At least a part of the portion 6b is inserted into the second enlarged diameter end portion 22, and the fixing screw 24 is fastened to the screw hole 23 to prevent it from coming off. The position of the screw hole 23 shown in the figure is set to the lower side for easy viewing, but any place where the fastening work can be easily performed may be selected.

Then, at the construction site, in the placement process, the first and second precast concrete walls 2 and 2 are placed at intervals using a crane or the like. At this time, as shown in FIG. 2, the first protruding end portion 10 and the second enlarged diameter end portion 22 are arranged at opposite positions. The gap between the side surfaces of the pair of precast concrete walls 2 and 2'is the joint portion 3.

Next, as shown in FIG. 1, in the joint pipe connecting step, the fixing screw 24 is loosened, the joint pipe 6 that has been prevented from coming off is opened, and the joint pipe 6 is pushed back to the compression coil spring 7, and the first protruding end portion 10 and The second enlarged diameter end portion 22 is connected.

After confirming that the compression coil spring 7 is urged and securely connected by the joint pipe 6, as shown in FIG. 3, in the mortar filling step, between the first and second precast concrete walls 2 and 2'. The joint portion is filled with mortar 3. At this time, since the water-expandable nonwoven fabric 8 that expands when water is contained is wound around both ends of the joint pipe 6, the water-expandable nonwoven fabric 8 swells with the moisture of the mortar, and the enlarged diameter tip portion of the joint pipe 6 is formed. It is possible to reliably seal between the inner circumference of 6a, the outer circumference of the first protruding end portion 10, the outer circumference of the small diameter base end portion 6b, and the inner circumference of the second expanded end portion 22.

Next, after the filler 3 has dried, an electric wire or the like is wired in the buried pipes 4, 4'. After connecting the first and second precast concrete walls 2 and 2, the compression coil spring 7 and the joint pipe 6 remain, but since these are cylindrical, cables and the like are connected to the first and second buried pipes 4 and 4'. It doesn't get in the way when you insert it. It should be noted that the insertion into the buried pipes 4 and 4'is not limited to electric wires and the like.

As described above, in the present embodiment, even when the distance between the buried pipe ends of the pair of precast concrete walls 2 and 2'is short, the joint pipe 6 and the compression coil spring 7 are attached to the second enlarged diameter end portion 22. The joint pipe 6 can be arranged between the first protruding end portion 10 and the second enlarged diameter end portion 22 as long as the interior is installed and the protruding amount of the joint pipe 6 is reduced. Then, the joint pipe 6 can be easily prevented from coming off with the fixing screw 24. Further, the joint pipe 6 can be released from the retaining state simply by loosening the fixing screw 24, and then the joint pipe 6 is moved to the first protruding end portion 10 side by the urging force of the compression coil spring 7, so that the joint pipe 6 can be released. Both ends of 6 are connected to the first protruding end portion 10 and the second expanded end portion 22, respectively. This ensures that the pair of buried pipes are connected.

In the present embodiment, the inner diameter of the second enlarged diameter end portion 22 can be suppressed by making the small diameter base end portion 6b side smaller, and the inner diameter of the enlarged diameter tip portion 6a becomes the outer diameter of the first protruding end portion 10. Since it may be molded together, it is easy to correspond to the shape of the buried pipe.

In the present embodiment, the screw hole 23 may be formed in an easily accessible portion of the protruding portion of the second enlarged diameter end portion 22, and the fixing screw 24 can be easily fastened.

Therefore, according to the joint member 30 according to the present embodiment, between the first protruding end portion 10 and the second enlarged diameter end portion 22 of the buried pipes 4, 4'of the pair of adjacent precast concrete walls 2, 2'. Even when the distance is short, the buried pipes 4, 4'can be easily connected to each other.

(Embodiment 2)
-Structure of joint structure-
FIG. 5 shows the second embodiment of the present invention, which is different from the first embodiment mainly in that the retaining pipe 6 has a different retaining structure. In the present embodiment, the same parts as those in FIGS. 1 to 4 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the joint member 130 of the present embodiment, as shown in FIG. 5, a plurality of first buried pipes 4 and second buried pipes 4'are arranged vertically, but a plurality of these may be arranged horizontally. ..

In the present embodiment, instead of the fixing screw 24, a plate-shaped retaining member for preventing the joint pipe 6 from coming off from the first protruding end portion 10 side of the joint pipe 6 in a state of being pushed into the second enlarged diameter end portion 22. It also has 124.

In the present embodiment, it is advantageous in that one retaining member 124 can be used, especially when a plurality of joint pipes 6 are released from the pushed state.

-How to use joint members-
Next, a method of using the joint member 130 according to the present embodiment will be described.

First, the joint member 130 of the precast concrete wall-embedded pipe of the present embodiment described above, and the second precast concrete in which the first precast concrete wall 2 and the second buried pipe 4'in which the first buried pipe 4 is embedded are embedded. Prepare the wall 2'.

Next, the small-diameter base end portion 6b of each joint pipe 6 is inserted into the second diameter-expanded end portion 22 in a state where the compression coil spring 7 is pushed in and the entire joint pipe 6 is accommodated in the second diameter-expanded end portion 22.

Next, the retaining member 124 is used to prevent the joint pipe 6 from coming off from the first protruding end portion 10 side. In the present embodiment, the retaining member 124 is inserted and removed in the vertical direction, but it may be inserted and removed in the horizontal direction.

Next, the first precast concrete wall 2 and the second precast concrete wall 2'are arranged so that the first protruding end portion 10 and the second enlarged diameter end portion 22 face each other.

Next, the retaining member 124 is removed, and the joint pipe 6 that has been retaining is sequentially opened. At this time, if the joint pipes 6 are marked and the joint pipes 6 are opened in order from the lower side, it is possible to confirm that the joint pipes 6 move sequentially from above, so that a plurality of joint pipes 6 can be reliably used. Can be opened to.

Then, in a state of being pushed back by the compression coil spring 7, the enlarged diameter tip portion 6a is connected to the first protruding end portion 10, and the second enlarged diameter end portion 22 is connected to the small diameter base end portion 6b.

In the present embodiment, since it is only necessary to dispose the plate-shaped retaining member 124 in front of the joint pipe 6, it is possible to easily prevent the joint pipe 6 from coming off.

Further, since the joint pipe 6 can be released from the retaining state only by removing the retaining member 124 in front of the joint pipe 6, the joint pipe 6 can be easily released even if a plurality of the joint pipes 6 are arranged side by side.

Also in this embodiment, the buried pipes 4 and 4'can be easily connected to each other as in the first embodiment.

-Modification example-
FIG. 6 shows a modified example of the second embodiment of the present invention, and the retaining member 224 is different from the second embodiment.

That is, as shown in FIG. 6, the retaining member 224 of the present modification is such that separate retaining members 224 are taken in and out from the horizontal direction with respect to the joint pipes 6 arranged one above the other.

Then, the retaining member 224 can be easily inserted and removed in the horizontal direction while visually checking, and the connection of the joint pipe 6 becomes easy.

(Other embodiments)
The present invention may have the following configurations for each of the above embodiments.

That is, in the first embodiment, as shown in FIG. 3, only one buried pipe 4, 4'is arranged on one precast concrete wall 2, 2', but one precast concrete wall 2, 2'. Two or more buried pipes 4, 4'may be arranged vertically or horizontally in'.

It should be noted that the above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications and uses.

1 Fitting structure
2 1st precast concrete wall
2'Second precast concrete wall
3 Mortar (filler, joint)
4 First buried pipe
4'Second buried pipe
6 Fitting pipe
6a Expanded diameter tip
6b Small diameter base end
7 Compression coil spring (urging member)
8 Water-expandable non-woven fabric
10 First protruding end
13 socket
20 Second buried pipe connection
21 2nd base end
22 Second enlarged diameter end
23 screw holes
24 fixing screw
30 Fitting members
51 Reinforcing bars
124 Retaining member 130 Joint member

Claims (6)

A joint member of a precast concrete wall buried pipe that connects buried pipes buried inside a pair of precast concrete walls.
Formed on the side surface side of the first precast concrete wall in the first protruding end of the first buried pipe buried in one first precast concrete wall and the second buried pipe buried in the other second precast concrete wall. A tubular joint pipe whose both ends are connected to the second expanded end of the concrete,
The second enlarged diameter end is provided with a cylindrical urging member that can accommodate the entire diameter.
The above joint pipe
The enlarged diameter tip connected to the first protruding end and
Including a small-diameter base end having an outer diameter smaller than that of the enlarged-diameter tip, which is inserted into the second-diameter-expanded end.
With the urging member pushed in and at least a part of the joint pipe is housed in the second enlarged diameter end portion, it can be inserted between the first protruding end portion and the second enlarged diameter end portion. Further, the precast is characterized in that both ends of the joint pipe are configured to be connectable to the first protruding end portion and the second enlarged diameter end portion, respectively, in a state of being pushed back by the urging member. Joint member for buried pipe in concrete wall. The joint member of the precast concrete wall-embedded pipe according to claim 1.
A part of the second enlarged diameter end portion protrudes from the side surface of the second precast concrete wall, and a fixing screw for fixing the joint pipe in a state where the urging member is pushed into the protruding portion is screwed. A joint member of a precast concrete wall-embedded pipe, characterized by having screw holes. The joint member of the precast concrete wall-embedded pipe according to claim 1.
A precast concrete wall further provided with a plate-shaped retaining member for preventing the joint pipe from coming off from the first protruding end side of the joint pipe in a state of being pushed into the second enlarged diameter end portion. Fitting member for inner buried pipe. The joint member of the precast concrete wall-embedded pipe according to any one of claims 1 to 3.
Prepare a first precast concrete wall in which the first buried pipe is buried and a second precast concrete wall in which the second buried pipe is buried.
The joint pipe is inserted into the second enlarged diameter end portion by pushing the urging member so as to accommodate the joint pipe, and then the joint pipe is prevented from coming off.
The first precast concrete wall and the second precast concrete wall are arranged side by side so that the first protruding end portion and the second enlarged diameter end portion face each other.
Buried in a precast concrete wall, characterized in that the first protruding end portion and the second enlarged diameter end portion are connected in a state where the joint pipe that has been prevented from coming off is opened and pushed back to the urging member. How to use pipe fittings. The joint member of the precast concrete wall-embedded pipe according to claim 2 and
Prepare a first precast concrete wall in which the first buried pipe is buried and a second precast concrete wall in which the second buried pipe is buried.
With the joint pipe pushed into the urging member and fully accommodated in the second diameter-expanded end, it is inserted into the second-diameter end and a fixing screw is fastened to the screw hole to prevent it from coming off. death,
The first precast concrete wall and the second precast concrete wall are arranged side by side so that the first protruding end portion and the second enlarged diameter end portion face each other.
The feature is that the first protruding end portion and the second enlarged diameter end portion are connected in a state where the fixing screw is loosened, the joint pipe that has been prevented from coming off is opened, and the joint pipe is pushed back to the urging member. How to use the joint member of the precast concrete wall buried pipe. The joint member of the precast concrete wall-embedded pipe according to claim 3 and
Prepare a first precast concrete wall in which the first buried pipe is buried and a second precast concrete wall in which the second buried pipe is buried.
The joint pipe is inserted into the second diameter-expanded end portion in a state where the urging member is pushed in and the whole is accommodated in the second diameter-expanded end portion, and the first one of the joint pipe is inserted by the retaining member. Prevent it from coming off from the protruding end side,
The first precast concrete wall and the second precast concrete wall are arranged side by side so that the first protruding end portion and the second enlarged diameter end portion face each other.
It is characterized in that the first protruding end portion and the second enlarged diameter end portion are connected in a state where the retaining member is removed, the joint pipe that has been prevented from coming off is opened, and the joint pipe is pushed back to the urging member. How to use the joint member of the precast concrete wall buried pipe.

Images