JP3390750B2 - Handhole and method of connecting pipe to handhole - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handhole provided at a relay point for cables such as electric wires and optical fibers buried underground.

[0002]

2. Description of the Related Art Generally, cables such as electric wires and optical fibers for communication are buried in the ground, but a hand hole for connecting and branching cables is installed in the middle of these cables. There is. Conventionally, a handhole is formed into a box by vertically arranging a rectangular tubular side wall on a rectangular bottom wall by, for example, concrete molding, and cables embedded in the ground are formed on the front and rear side walls. It is formed with an insertion hole having a circular cross section that is inserted through a tube body called a so-called sheath tube or the like. As shown in FIG. 5, when the tubular body K is provided in such a handhole H, a box-shaped handhole H (FIG. 5) prepared in advance is prepared.
A required number of insertion holes 1 are formed at required positions on the side wall of the
), In this state, the tubular body K is inserted into the insertion hole 1 (see FIG. 5).
) Finally, seal the gap between the insertion hole 1 and the tubular body K from the outside and inside of the hand hole H by attaching a sealing agent 2 called a caulking agent or the like (FIG. 5) to waterproof it. There is.

[0003]

By the way, in such a conventional hand hole, since the sealing agent 2 is attached and sealed in the gap between the insertion hole 1 and the tubular body K, the sealing work is not performed. There was a problem that it was complicated and workability was poor. For example, when the through holes 1 are provided on the side wall in the front-rear direction at 10 positions, the total number of the insertion holes 1 is 20, and the sealing sites are at the outside and inside of the hand hole H. It also becomes. Since the sealant 2 is attached to all the parts, the work is extremely complicated and difficult. Further, since it is difficult to fill the sealant 2 into the gap between the insertion hole 1 and the tubular body K, the seal is likely to be non-uniform, and there is a demand for further perfecting the seal and improving waterproofness. . The present invention has been made in view of such problems, and aims to improve the sealing workability by simplifying the sealing of the gap between the insertion hole and the tubular body, and the sealing property of the gap between the insertion hole and the tubular body. It is an object of the present invention to provide a handhole and a method for connecting a pipe body to the handhole, which are improved in

[0004]

The technical means of the present invention for solving such a problem is to insert a side wall on a bottom wall in a box shape and insert a pipe into the side wall. In a concrete hand hole in which a hole is formed, an opening is formed at the upper end of the side wall in the widthwise middle part of the side wall in which the insertion hole is formed, and the outer periphery of the middle part of the insertion hole communicates across the insertion hole. The recess is filled with the sealant. More specifically, a tubular side wall having four rectangular surface portions is erected on a rectangular bottom wall to form a box shape, and the tubular body is inserted into at least one surface portion of the side wall. In a concrete hand hole in which a hole is formed, an opening is provided at the upper end of the side wall in the widthwise middle portion of the side wall portion in which the insertion hole is formed, and the outer periphery of the middle portion of the insertion hole traverses the insertion hole. Is formed so as to communicate with each other and form a recess filled with the sealant.

According to this, when the pipe body is inserted into the insertion hole and then the sealant is poured from the opening of the recess, the sealant is applied to the outer periphery of the pipe body exposed from the middle portion of the insertion hole to the recess. , The recess is filled with the sealant, and the tube body and the insertion hole are sealed with the sealant. Therefore, it is possible to temporarily seal the pipes simply by pouring the sealant into the recesses, which makes the work extremely easy compared to the conventional case where the sealant is attached to each pipe. Therefore, the sealing workability is significantly improved. In particular, it is extremely effective when there are a large number of pipes and insertion holes. In addition, the sealant is filled inside the gap between the insertion hole and the pipe, and the sealant adheres to the outer periphery of the pipe, so the seal is uniform and groundwater, rainwater, etc. can easily enter. Therefore, the sealing is surely performed and the waterproofing is improved. Furthermore, since the recess is formed in the widthwise middle portion of the side wall, the shape of the existing side wall is not changed, and since the sealant is filled, the strength is not inferior.

[0006] And, the forming a top Symbol recess in a rectangular shape having a respective sides parallel to each side face portion of the side wall. The range of forming the insertion hole can be widened. Also, it has a configuration which is molded on the Symbol recess in the recess mold. The recess can be molded at the same time as the entire molding, and the molding efficiency can be improved. In this case, the recess is formed by a recess forming die that is a set of split dies that are pulled out from the opening.
It Demolding is facilitated, damage to the side wall having a recess during demolding is prevented, the recess can be reliably formed on the side wall, and the yield can be improved.

Further, in order to solve the above-mentioned problems, a method of connecting a pipe body to a handhole according to the present invention is a rectangular bottom wall.
A cylindrical side wall with four rectangular surface parts is erected on the box
-Shaped concrete handhole is provided with an insertion hole through which the pipe is inserted in the surface portion of the side wall , the pipe is inserted into the insertion hole, and then the pipe and the insertion hole are sealed. in connection of the seal to the tube body in the hand hole for connecting the tube to the hand hole in agent, the have a clear aperture at the upper end of the side wall <br/> width direction intermediate portion of the surface portion of the side wall Each of the face parts
Insert the rectangular recess with the sides parallel to the open mouth.
Molded with a recess molding die consisting of a set of split dies that are pulled out from
Prepare a shaped handhole, and form the insertion hole in the side wall of the handhole so that the outer periphery of the intermediate portion communicates with the recess, insert the tube into the insertion hole, and then insert the recess. The sealant is poured from the opening of the plug, the sealant is adhered to the outer periphery of the tube body exposed in the recess from the intermediate portion of the insertion hole to fill the recess with the sealant, and the tube and the insertion hole are separated from each other. The connection is made by sealing with a sealant. According to this, since it is possible to temporarily seal the tubular body simply by pouring the sealing agent into the recess, the work can be performed in comparison with the conventional case where the sealing agent is attached to each tubular body. It becomes extremely easy and the sealing workability is greatly improved. Especially when there are a large number of pipes and insertion holes,
It will be extremely effective. In addition, the sealant is filled inside the gap between the insertion hole and the pipe, and the sealant adheres to the outer periphery of the pipe, so the seal is uniform and groundwater, rainwater, etc. can easily enter. Therefore, the sealing is surely performed and the waterproofing is improved. Furthermore, since the recess is formed in the widthwise intermediate portion of the side wall, the shape of the existing side wall is not changed, and since the sealant is filled, the strength is not inferior.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A handhole and a method of connecting a pipe body to the handhole according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The method of connecting the tubular body to the handhole according to the embodiment is realized by using the handhole according to the embodiment, and will be described in the operation of the handhole. As shown in FIGS. 1 and 2, the handhole H according to the embodiment of the present invention has a rectangular bottom wall 10.
A tubular side wall 12 having four rectangular surface portions 11 is erected to form a box shape, and at least one surface portion 11 of the side wall 12 has a cable (not shown) buried in the ground. No. 2) is formed with an insertion hole 13 having a circular cross section, which is inserted through a tubular body K called a so-called sheath tube or the like.
In the embodiment, the insertion holes 13 are formed on the pair of surface portions 11 of the side wall 12 in the front-rear direction at the same position, six at a time.

The side wall 1 is formed in the widthwise intermediate portion of the pair of surface portions 11 of the side wall 12 in the front-rear direction in which the insertion hole 13 is formed.
2 has an opening 14 at the upper end and traverses the insertion hole 13 so that the outer periphery of the intermediate portion of the insertion hole 13 communicates with the sealing agent M.
A recess 15 filled with (mortar in the embodiment) is formed. The recess 15 is formed in a rectangular shape having sides parallel to each side of the surface portion 11 of the side wall 12.
Since the recess 15 is rectangular, the range in which the insertion hole 13 is formed can be widened. As shown in FIG. 3, the recess 15 is formed by molding with a recess molding die 20. The recess molding die 20 is composed of a group of split molds that are pulled out from the opening 14, and specifically, the recess molding die 20 is a rectangular plate-shaped outer side which is joined in a row in the width direction and is slidable with respect to each other. It is composed of a split mold 21, a rectangular plate-shaped intermediate split mold 22 including the first and second intermediate split molds 22a and 22b, and a rectangular plate-shaped inner split mold 23. First and second intermediate split molds 22a,
22b is configured to have an inclined surface 24 that is inclined with respect to the die cutting direction (vertical direction) and is joined to each other. still,
The entire handhole H is molded by a known molding die (not shown).

Therefore, when molding the handhole H, the outer split mold 21, the intermediate split mold 22, and the inner split mold 23 are assembled and adhered to a mold (not shown) for molding the entire handhole H. A rectangular recess molding die 20 joined with an agent or the like is installed by an appropriate supporting means, and fluidized concrete is poured into this molding die, cured for a predetermined time, and when solidified, released from the mold. In this case, the recess 15 can be molded at the same time as the entire molding, and the molding efficiency is improved. When the recess molding die 20 is released, first, the first intermediate split die 2 of the intermediate split die 22 is pressed.
Pull out 2a. In this case, the first intermediate split mold 22a is
It can slide with respect to the outer split mold 21 and the inner split mold 23 on both sides, and moreover, because it is joined to the second intermediate split mold 22b by the inclined surface 24, it can be easily pulled out. Next, the second intermediate split mold 22b is pulled out. In this case, the second intermediate split mold 22b can slide with respect to the outer split mold 21 and the inner split mold 23 on both sides, and moreover, since there is a space where the first intermediate split mold 22a is pulled out, it is easy to Be pulled out. Then, the outer split mold 21 and the inner split mold 23
Pull out. In this case, the first and second intermediate split molds 22
When the rectangular plate-shaped intermediate split mold 22 composed of a and 22b is pulled out, a space is created between the outer split mold 21 and the inner split mold 23. The outer split mold 21 and the inner split mold 23 are easily peeled off from the concrete surface. for that reason,
The outer split mold 21 and the inner split mold 23 can also be demolded very easily. Therefore, at the time of demolding, the sidewall 1 having the recess 15 is formed.
2 is prevented from being damaged, and the recess 15 is surely secured to the side wall 1
2 can be formed, and the yield can be improved.

Next, the handhole H according to the embodiment.
The case of installing and connecting the pipe body K will be described.
As shown in FIG. 4, when the tubular body K is provided in this handhole H, a handhole H having a box shape and a recess 15 formed in the widthwise middle portion of the side wall 12 is prepared (see FIG. 4).
), A required number of insertion holes 13 are formed at required positions of the side wall 12 of the handhole H so that the outer periphery of the intermediate portion communicates with the recess 15 (FIG. 4). In this state, the tubular body K is inserted into the insertion hole 13 (FIG. 4). Then, in this state, the sealant M (mortar) is poured from the opening 14 of the recess 15 (FIG. 4). As a result, the sealing agent M adheres to the outer periphery of the tube body K exposed in the recess 15 from the intermediate portion of the insertion hole 13, and when the recess 15 is filled with the sealing agent M, the tube body K and the insertion hole 13 are separated from each other. Are sealed and connected with the sealing agent M (FIG. 4). In this case, all the pipes K can be sealed at once by simply pouring the sealant M into the recesses 15. Therefore, in comparison with the conventional case where the sealant is attached to each pipe K, Therefore, the work becomes extremely easy, and the sealing workability is greatly improved.

In the handhole H in which the pipe body K is connected in this manner, and then the cables are drawn through the pipe body K and is buried in the ground, groundwater, rainwater, etc. are inserted into the insertion hole 13 and the pipe body K. However, the sealant M is filled in the gap between the insertion hole 13 and the pipe body K, and the sealant M is attached to the entire outer circumference of the pipe body K. As a result, the seal is uniform, and groundwater, rainwater, etc. do not easily infiltrate, so that the seal is reliable and waterproofing is improved. Further, since the recess 15 is formed in the widthwise intermediate portion of the side wall 12, the existing side wall 12 is not formed.
The shape is not changed, and since the sealing agent M is filled, the strength is comparable.

Although mortar is used as the sealant M in the above embodiment, the sealant M is not limited to this, and any material may be used. In addition, in the embodiment, the insertion holes 13 are formed in each of the six surface portions 11 of the front and rear side walls 12, but the number of insertion holes 13 is not limited to this, and any number may be formed as necessary. Furthermore, in the embodiment, the recess 15 is provided in the surface portion 11 of the front and rear side walls 12, but the invention is not necessarily limited to this, and only one surface portion 11 or three surface portions 11 or four surface portions are provided. Needless to say, it may be formed as necessary, for example, by providing it in No. 11.

[0014]

As described above, according to the handhole and the method of connecting the pipe body to the handhole of the present invention, the pipe body can be temporarily sealed only by pouring the sealant into the recess. Therefore, as compared with the conventional case where the sealing agent is attached to each pipe, the work is extremely easy and the sealing workability can be greatly improved. In particular, it is extremely effective when there are a large number of pipes and insertion holes. In addition, the sealant is filled inside the gap between the insertion hole and the pipe, and the sealant adheres to the outer periphery of the pipe, so the seal is uniform and groundwater, rainwater, etc. can easily enter. Therefore, the sealing is surely performed, and the waterproofness can be improved. Furthermore, since the recess is formed in the widthwise middle portion of the side wall, the shape of the existing side wall is not changed, and since the sealant is filled, the strength is not inferior.

In a rectangular box-shaped handhole,
Since the recess is formed in a rectangular shape having a respective sides parallel to each side face portion of the side wall, it is possible to widen the range of forming the through hole. Furthermore, since the recess was molded with the recess mold ,
The recess can be molded at the same time as the entire molding, and the molding efficiency can be improved. Furthermore, the recess was molded with a recess molding die consisting of a set of split molds that were pulled out from the opening .
Thus, the mold release is facilitated, the side wall having the recess is prevented from being damaged during the mold release, the recess can be surely formed on the side wall, and the yield can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a handhole according to an embodiment of the present invention together with a method of connecting a pipe body to the handhole.

FIG. 2 is a sectional view showing a handhole according to an embodiment of the present invention.

FIG. 3 is a perspective view showing the handhole according to the embodiment of the present invention together with a recess forming die for forming the recess.

FIG. 4 is a diagram showing a process of connecting a pipe body to a handhole according to an embodiment of the present invention.

FIG. 5 is a diagram showing a process of connecting a tubular body to a conventional handhole.

[Explanation of symbols]

H hand hole K tube 10 bottom wall 11 faces 12 Side wall 13 insertion holes 14 Opening mouth 15 recess 20 Recessed mold 21 Outside split type 22 Intermediate division type 22a First intermediate division type 22b Second intermediate split type 23 Inner split type 24 inclined surface

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-11-234830 (JP, A) JP-A-4-4721 (JP, A) JP-A-9-254120 (JP, A) JP-A-7- 42186 (JP, A) JP 11-313433 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02G 1/06 H02G 9/10 E02D 29/12 F16L 5/02

Claims (2)

(57) [Claims] 1. A through hole in which a tubular side wall having four rectangular surface portions is erected on a rectangular bottom wall to form a box shape, and a tubular body is inserted through at least one surface portion of the side wall. In the concrete handhole in which the insertion hole is formed, an opening at the upper end of the side wall is formed in the widthwise intermediate portion of the surface portion of the side wall where the insertion hole is formed, and the outer periphery of the intermediate portion of the insertion hole traverses the insertion hole. A recess is formed in which the sealant is communicated, and the recess has a side parallel to each side of the surface of the side wall.
It is formed into a rectangular shape, and the recess is connected to the opening.
Molded with a recess molding die consisting of a set of split dies that are pulled out from
A hand hole characterized by being shaped . 2. A rectangular bottom wall having four rectangular surface portions.
A tubular side wall is erected to form a box-shaped concrete handhole with an insertion hole through which the tubular body is inserted in the surface portion of the side wall , and the tubular body is inserted into the insertion hole, and thereafter. In the method of connecting the pipe body to the handhole by sealing the pipe body and the insertion hole with a sealant to connect the pipe body to the handhole, in the widthwise intermediate portion of the face portion of the side wall, the upper end of the side wall is provided. It has a mouth opening rectangular concave having a respective sides parallel to the sides of said surface portion
It consists of a split type set that is pulled out from the opening
Prepare a hand hole that is molded with a recess molding die, form the insertion hole in the side wall of the hand hole so that the outer periphery of the intermediate portion communicates with the recess, and insert the tubular body into the insertion hole. After that, a sealant is poured from the opening of the recess, and the sealant is adhered to the outer periphery of the tubular body exposed in the recess from the intermediate portion of the insertion hole to fill the recess with the sealant,
A method of connecting a pipe body to a handhole, characterized in that the pipe body and the insertion hole are sealed and connected with a sealant.