JP2007262841A - Mounting structure of tubular body to piping box - Google Patents

Abstract

An object of the present invention is to provide a tubular body and attachment structure to a piping box that is easy to construct, has good workability, has good water-stopping properties, has a small number of parts, and has a simple structure.
A short tubular joint having a flange having a diameter larger than that of the attachment hole is inserted into an attachment hole of a tubular body of a piping box from the inside of the piping box, and is connected to the other end of the joint. A ring-shaped packing is pressed against the outer peripheral wall surface of the mounting hole by a sleeve-shaped holder attached in a retaining shape.
[Selection] Figure 1

Description

  The present invention generally relates to an attachment structure for attaching a tubular body such as a receiving joint or a pipe to an attachment hole of a tubular body formed in a piping box such as a hand hole or a manhole.

  Piping boxes are installed at intervals of several hundred meters, and a large number of pipes for passing cables and the like are laid between the piping boxes. These pipes are attached directly to a wall of the piping box or a mounting hole formed in the fixing plate of the wall or via a joint, and communicate with the piping box.

In order to attach a tubular body such as a pipe or a joint to the mounting hole, the tubular body is inserted into the mounting hole, and the gap between the inner peripheral surface of the mounting hole and the outer peripheral surface of the tubular body is stopped by the following means. It is fixed.
First, the tubular body is fixed by filling mortar or epoxy paste in the gap between the mounting hole and the tubular body.
Secondly, a water-swellable rubber water-stop ring and a water-foamable material water-stop ring are inserted and sealed into the gap in a double manner (summary of Patent Document 1 described later).

According to the first means, the work of completely filling the mortar and the epoxy putty in the narrow gap is not easy, and the work for kneading the mortar and the epoxy putty is troublesome, so the workability is poor.
Specifically, the second means is based on the following work procedure. That is, first, the end of the pipe fitted with the water-swellable rubber is inserted into the mounting hole of the pipe box from the outside, and the water-swellable rubber is fixed with the fastening band after positioning. After inserting the water foam material from the inside of the piping box, insert a sponge impregnated with water to foam and solidify the water foam material and fix the pipe, and to prevent the water foam material from flowing out, Pack mortar from the inside. Since such a work is required, the workability of the second means is extremely poor and the number of parts is large.
JP 09-324437 A

  The problem to be solved by the present invention is to improve workability when attaching a tubular body with water-stopping properties to a piping box, and its purpose is easy construction, good water-stopping, fewer parts, and simple structure. To provide a tubular body and a mounting structure to a piping box.

One of the mounting structures of the tubular body to the piping box according to the present invention is to solve the above-mentioned problem,
A short tubular joint having a flange having a diameter larger than that of the mounting hole is inserted into the mounting hole of the tubular body of the piping box from the inside of the piping box, and the other end of the joint is prevented from coming off. The most important feature is that the ring-shaped packing is pressed against the outer peripheral wall surface of the mounting hole by the mounted sleeve-shaped holder.

  Another one of the attachment structures of the tubular body to the piping box according to the present invention is to insert the end portion of the pipe into the attachment hole of the tubular body of the piping box and to the pipe end portion in order to solve the above-mentioned problem. A bell mouth having a flange larger in diameter than the mounting hole is inserted from the inside of the piping box in a retaining shape, and is attached to the outer peripheral surface of the pipe outside the piping box via a water stop member. The main feature is that the ring-shaped packing is pressed against the outer peripheral wall surface of the mounting hole by the sleeve-shaped holder.

  According to one of the mounting structures of the tubular body to the piping box according to the present invention, a short tubular joint is inserted into the mounting hole of the piping box from the inside of the piping box, and the sleeve is connected to the other end of the joint. When the cylindrical holder is attached in a retaining shape, the packing is pressed against the outer peripheral wall surface of the mounting hole by the holder, and at the same time, the receiving joint (tubular body) is attached to the mounting hole. Can be attached to the attachment hole.

That is, when the packing is pressed against the outer peripheral wall surface of the mounting hole with the holder, the tubular joint is connected to the mounting hole with the flange of the receiving joint and the holder through the packing sandwiching the wall of the piping box. At the same time, the gap between the mounting hole and the outer peripheral surface of the receiving joint is stopped by the packing outside the mounting hole.
Further, the number of parts is small and the structure is simpler.

  According to another one of the mounting structures of the tubular body to the piping box according to the present invention, the end of the pipe is inserted into the mounting hole of the piping box, and the pipe end is larger in diameter than the mounting hole. When a bell mouth having a flange is inserted from the inside of the piping box in a retaining shape, and a sleeve-like holder is attached to the outer peripheral surface of the pipe outside the piping box via a water stop member, the outer peripheral wall surface of the mounting hole Since the herring-like packing is pressed and at the same time the tube is attached to the attachment hole, the tubular body (tube) can be attached to the attachment hole easily and with good workability.

That is, when the packing is pressed against the outer peripheral wall surface of the mounting hole with the holder, the pipe is fixed to the mounting hole with the flange of the bell mouth and the holder through the packing sandwiching the wall of the piping box. And the outer peripheral surface of the receiving joint are water-stopped by the packing and the water-stop member outside the mounting hole.
Also, the number of parts is small and the structure is simpler.

First Embodiment FIG. 1 is a partial sectional view showing a first embodiment of a mounting structure according to the present invention.
The wall 10 of the piping box 1 such as a hand hole or a manhole is formed with a mounting hole 11 having a diameter slightly larger than the outer shape of the short tubular receiving joint 2 which is a tubular body. A short tubular joint 2 having a flange 20 formed at one end is inserted into the mounting hole 11 from the inside of the piping box 1.
The receiving joint 2 is a hard plastic spiral wave tube, and a hard plastic sleeve-like holder 3 is attached to the other end protruding from the mounting hole 11 to the outside of the piping box 1 in a retaining manner. .

  The holder 3 is formed with a flange-shaped holding portion 32 having a holding groove at the end on the mounting hole 11 side, and the ring-shaped packing 4 is held on the holding portion 32. Therefore, by attaching the holder 3, the packing 4 is pressed in a compressed state against the outer peripheral wall surface while closing the outer end portion of the mounting hole 11, and a gap between the outer peripheral surface of the receiving joint 2 and the inner surface of the mounting hole 11 is formed. At the same time as the water is stopped, the receiving joint 2 is attached to the attachment hole 11 in a tightened state.

In this embodiment, since the sleeve-shaped holder 3 is attached to the protruding other end of the joint 2 by screwing, the joint 2 has its own flange 20 and the holding part 32 of the holder 3. Thus, the wall 10 of the piping box 1 is firmly fixed to the mounting hole 11 in a sandwiched state.
The packing 4 may be made of any material as long as it is generally used for waterproofing sealing, but may be a material that expands by absorbing moisture such as a water-expandable rubber packing or a water-expandable nonwoven. It is preferable in operation.

The holder 3 in this embodiment is formed of hard plastic so as to serve also as a pipe joint, and has a connecting part 30 having an internal thread for attaching to the end of the receiving joint 2 and a pipe joint 5 or a pipe (cable protection pipe). ) And a joint portion 31 connected to one end portion of 6.
In this embodiment, the first joint portion 50 of the pipe joint 5 having the first joint portion 50 at one end and the second joint portion 51 at the other end is connected to the joint portion 30 of the holder 3 as follows. Is done. That is, the first joint portion 50 of the pipe joint 5 is a spiral-wave-like joint portion that matches the inner surface screw formed in the joint portion 30, and the waterstop material 7 is attached to the outer peripheral surface thereof. In this state, it is connected to the joint portion 30 of the holder 3 by screwing.

Moreover, the end part of the pipe 6 with a spiral wave having a spiral wave that fits the second joint part 51 with a spiral wave of the pipe joint 5 is connected by screwing together through a similar water stop material 7. Is done.
As the water-stopping material 7, a water-expandable water-stopping material, a highly water-absorbing resin, or a non-woven fabric / high-grade water-based resin mixture is preferably used. A water material is preferable in terms of operation. Moreover, it is preferable that these water blocking materials 7 are previously attached to the outer peripheral surface of the pipe joint 5 or the pipe 6.

The tubular body mounting structure of the first embodiment has the following effects.
First, the other end of the joint 2 having a flange 20 at one end is inserted into the mounting hole 11 of the piping box 1, and a sleeve-like packing 4 is held on the other end of the joint 2. By attaching the holder 3, the fitting of the receiving joint 2, which is a tubular body, to the attachment hole 11 and the sealing between them are performed at the same time, so that workability is further improved.

  Second, the joint 2 is fixed in a state where the wall 10 of the piping box 1 is sandwiched between the flange 20 and the holding portion 32 that holds the packing 4 of the holder 3, and the elasticity of the packing 4 also acts. Thus, the receiving joint is more firmly fixed to the mounting hole 11. For example, when a load on the outer side of the pipe box 1 is applied to the joint 2 that is a tubular body for some reason, the flange 20 of the joint 2 is caught in a pressed state on the wall 10. 2 can be prevented from slipping out of the mounting hole 11. On the other hand, when a load toward the inner side of the piping box 1 is applied to the receiving joint 2 due to various causes, the flange-shaped holding portion 32 of the holder 3 is caught on the outer wall surface of the piping box 1 in a pressed state. Further, it is possible to prevent the receiving joint 2 from coming out of the mounting hole 11 inward.

Thirdly, since the holder 3 has a joint part 31 for connecting the end part of the inter-joint 5 and the pipe 6 in addition to the connection part 30 to the receiving joint 2, the pipe 6 and the piping box 1 are simply connected. Or you can communicate.
Fourth, when the first joint portion 50 of the pipe joint 5 is connected to the joint portion 31 of the holder 3, the water stop material 7 is interposed as described above, thereby preventing the pipe box 1 from being connected to the outside. Water structure becomes more sufficient.

Second Embodiment FIG. 2 is a partial sectional view showing a second embodiment of the mounting structure according to the present invention.
At the end of the holder 3 on the connection part 30 side, an annular protrusion 33 is formed integrally with the inner groove wall of the flange-shaped holding part 32 and has an outer diameter slightly smaller than the inner diameter of the mounting hole 11.
The annular protrusion 33 serves as a guide when the holder 3 is attached to the end of the receiving joint 2 that protrudes outside the box, and the annular protrusion 33 is guided from the outside to the inside of the attachment hole 11 during the attachment. The centering of the three members 11, the receiving joint 2, and the holder 3 is facilitated, and at the same time, the receiving joint 2 is more stably fixed to the mounting hole 11.

As shown in the drawing, the end of the pipe 6 such as a cable protection pipe is connected to the joint 31 of the holder 3 via the water stop material 7 as described above without using the pipe joint 5 of FIG.
In addition, the pipe 6 can be connected to the joint part 31 of the holder 3 through the pipe joint 5 similarly to the attachment structure of the first embodiment.
Since the other structure of the mounting structure of this embodiment is the same as that of the first embodiment, its description is omitted.

Third Embodiment FIG. 3 is a partially exploded sectional view showing a third embodiment of the mounting structure according to the present invention.
In the mounting structure of this embodiment, the holder 3 is not configured to serve as a pipe joint as in each of the above-described embodiments, but includes a means for mounting the receiving joint 2 that is a tubular body to the mounting hole 11 of the piping box 1 and the packing 4. Only the function of the water stop assisting means for the gap between the mounting hole 11 and the receiving joint 2 is provided.
Accordingly, the first joint portion 50 of the pipe joint 5 or the end portion of the pipe 6 is connected to the end portion of the receiving joint 2 that protrudes outside the box 1.

In this embodiment, since the packing 4 is in contact with the outer peripheral surface of the joint 2 and the outer wall surface of the piping box 1 outside the mounting hole 11, the gap between the mounting hole 11 and the outer peripheral surface of the joint 2 is stopped. I'm watering. If this water stop structure is still insufficient, a water stop material similar to the water stop material 7 is preferably interposed between the outer peripheral surface of the receiving joint 2 and the inner peripheral surface of the holder 3.
Since other configurations and operational effects of the mounting structure according to this embodiment are the same as those of the first embodiment, description thereof will be omitted.

4th Embodiment FIG. 4: is a fragmentary sectional view of the attachment structure based on 4th Embodiment of this invention.
A mounting hole 11 having an inner diameter slightly larger than the outer diameter of the tube 6 such as a tubular cable protection tube is formed in the wall (or fixing plate of the pipe line) 10 of the piping box 1. The end of the tube 6 shaped like a spiral wave is inserted from the outside.
Before the end of the tube 6 is inserted into the mounting hole 11, the sleeve-shaped holder 3 is slightly deepened to the outer periphery of the end of the tube 6 through the water-stopping material 7 as in the above embodiment (the end of the tube 6). It is temporarily attached by screwing (in a state where the distance to the packing 4 held by the holder 3 is slightly larger than the thickness of the wall 10).

  A bell mouth 8 having a flange 80 having a diameter larger than that of the attachment hole 11 is inserted into the end portion of the pipe 6 from the inside to the one end portion of the pipe box 1 so as not to come off. In this embodiment, the bell mouth 8 has an inner surface spiral wave that matches the outer surface spiral wave of the tube 6, so that they are coupled by screwing. After this insertion, the holder 3 is screwed toward the outer wall surface of the piping box 1, and the packing 4 held on the flange-like holding portion 32 of the holder 3 is pressed against the outer peripheral surface of the mounting hole 11 in a compressed manner.

According to the mounting structure of the fourth embodiment, the following effects can be obtained.
First, after the end portion of the pipe 6 is inserted into the attachment hole 11 from the outside of the piping box 1, the other end portion of the bell mouth 8 having the flange 80 at one end portion is prevented from coming off from the inside of the piping box 1 to the pipe 6. And attaching the sleeve-like holder 3 holding the ring-like packing 4 to the outer peripheral surface of the pipe 6 via the water blocking material 7, so that the pipe 6 is attached to the attachment hole 11 and the attachment hole 11. Since the gap between the outer peripheral surfaces of the end portions of the tube 6 is simultaneously sealed, workability is further improved.

Secondly, the pipe 8 is fixed in a state where the wall 10 of the piping box is sandwiched between the flange 80 of the bell mouth 8 and the holding portion 32 holding the packing 4 of the holder 3, and the elasticity of the packing 4 acts together. Therefore, the tube 6 is more completely and firmly fixed to the attachment hole 11. When various external forces are applied to the pipe 6, the movement of the pipe 6 to the outside of the piping box 1 and the movement of the pipe box 1 to the inside are effectively prevented according to the first embodiment. It is the same as that.
Since the other structure and effect of the attachment structure of 4th Embodiment are the same as that of 1st Embodiment, those description is abbreviate | omitted.

It is a fragmentary sectional view which shows 1st Embodiment of the attachment structure of the tubular body to the piping box which concerns on this invention. It is a fragmentary sectional view which shows 2nd Embodiment of the attachment structure of the tubular body to the piping box which concerns on this invention. It is a fragmentary sectional view which shows 3rd Embodiment of the attachment structure of the tubular body to the piping box which concerns on this invention. It is a fragmentary sectional view which shows 4th Embodiment of the attachment structure of the state to the piping box which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Piping books 10 Wall of piping box 11 Hole of wall 2 Joint 20 and 80 Flange 3 Holder 30 Connection part 31 Joint part 32 Holding part 4 Packing 5 Pipe joint 50 First joint part 51 Second joint part 6 Pipe 7 Water stop Material 8 Bellmouth

Claims (7)

A short tubular joint having a flange having a diameter larger than that of the mounting hole is inserted into the mounting hole of the tubular body of the piping box from the inside of the piping box, and the other end of the joint is prevented from coming off. A structure for mounting a tubular body to a piping box, wherein a ring-shaped packing is pressed against the outer peripheral wall surface of the mounting hole by a mounted sleeve-shaped holder. The receiving joint is fixed to the mounting hole in a state in which a wall of the piping box is sandwiched between the flange and a flange-shaped holding portion of the holder that holds the packing. 1. A structure for attaching a tubular body to the piping box according to 1. The said holder has a connection part for attaching to the said receiving joint to one end part, and has a joint part connected with the one end part of a pipe | tube or a pipe joint to the other end part. Attachment structure of the tubular body to the described piping box. The attachment structure of the tubular body to the piping box according to any one of claims 1 to 3, wherein the holder is attached to the other end of the receiving joint by screwing. Insert the end of the pipe into the mounting hole of the tubular body of the piping box, and insert a bell mouth having a flange larger in diameter than the mounting hole into the pipe end from the inside of the piping box, A pipe characterized in that a ring-shaped packing is pressed against the outer peripheral wall surface of the mounting hole by a sleeve-like holder attached to the outer peripheral surface of the pipe via a water-stopping member outside the piping box. Mounting structure of tubular body to box. The holder is attached to the outer peripheral surface of the pipe by screwing, and the pipe is sandwiched between the flange of the bell mouth and the flange-shaped holding portion of the holder holding the packing. The tubular body mounting structure to a piping box according to claim 5, wherein the mounting structure is fixed to the mounting hole. The structure for attaching a tubular body to a piping box according to any one of claims 1 to 6, wherein the packing is a water-expandable rubber packing or a water-expandable nonwoven fabric.

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