JPH11215677A - Handhole and pipe connecting structure in handhole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handhole and a pipe connecting structure which can prevent a duct sleeve from being damaged at the time of pipeline open-cut work or transport. SOLUTION: A short pipe 4 for fitting installation having a bellmouth 41 and a fitting insertion part 42 is embedded at a prescribed position of the peripheral wall 21 of a body 2 of handhole 1. The insertion parts 62a, 62b of fittings 6a, 6b having receiving openings 54a, 64b and the insertion parts 62a, 62b are inserted in the fitting insertion part 42 of the short pipe 4, and a cable protective pipe 7 is inserted in the receiving opening 64a, 64b of the fittings 6a, 6b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handhole for arranging cables such as a power cable and a communication cable underground and a pipe connection structure in the handhole.

[0002]

2. Description of the Related Art Cables such as electric power cables and communication cables are covered with cable protection tubes and buried underground so as not to be affected by earth pressure or groundwater. When buried underground, hand holes 1P as shown in Fig.
After that, a method is used in which the hand holes 1P are cut open, the hand holes 1P are connected to each other by the cable protection pipe 7P, and the protection pipe 7P is buried.

[0003]

However, in the conventional handhole 1P described above, the duct sleeve 4P
Since the portion other than the root end portion 44P protrudes from the peripheral wall 21P of the main body 2P of the handhole 1P, the duct sleeve protrusion 45P is easily damaged by heavy equipment or the like at the time of pipeline opening work. Even if only one duct sleeve 4P out of a plurality of duct sleeves 4P is damaged,
Since the plurality of duct sleeves 4P are close to each other, only the damaged duct sleeve 4P cannot be replaced, and the entire peripheral wall 21P of the main body 2P of the handhole 1P to which the damaged duct sleeve 4P is fixed. Need to be replaced.

[0004] Also, during transportation, the duct sleeve protrusion 45P protruding from the peripheral wall 21P of the main body 2P of the handhole 1P lowers the loading efficiency, and the duct sleeve protrusion 45P is more likely to be damaged. .

Accordingly, an object of the present invention is to provide a handhole and a pipe connection structure in which a duct sleeve is not liable to be damaged at the time of pipeline opening work or transportation.

[0006]

SUMMARY OF THE INVENTION According to the present invention, in order to solve the above problems, first, a handhole (1) main body (2)
A hand hole (4) characterized in that a short pipe (4) for fitting a pipe fitting having a bell mouth portion (41) and a fitting pipe fitting portion (42) is embedded in a predetermined portion of the peripheral wall (21) of the handhole (21). 1)
Second, a short pipe for fitting a pipe joint (41) having a bell mouth part (41) and a pipe fitting insertion part (42) and buried in a predetermined portion of the peripheral wall (21) of the handhole (1) body (2). 4) and a pipe joint (6) inserted into the pipe joint insertion portion (42) of the short pipe (4).
Thirdly, a pipe joint for the hand hole (1) and a short pipe (4) for fitting a pipe joint in the hand hole (1). Fourth, a handhole (1) with a pipe joint (6a, 6b) comprising a pipe joint (6a, 6b) inserted into the insertion portion (42). A pipe fitting mounting short pipe (4) having a bell mouth part (41) and a pipe fitting insertion part (42) is buried at a predetermined position on a peripheral wall (21) of the main body (2). The fittings (62a, 62b) of fittings (6a, 6b) having fittings (64a, 64b) and fittings (62a, 62b) are fitted to fittings fitting fitting (42). ,
The present invention provides a pipe connection structure in a handhole (1), characterized in that a cable protection pipe (7) is inserted into a socket (64a, 64b) of the pipe joint (6a, 6b).

When the handhole (1) is buried in the ground, a lid (5) for closing the opening is provided in the opening of the fitting portion (42) of the pipe fitting mounting short pipe (4). ) Is preferably removably mounted.

Further, rubber ring mounting grooves (65a, 65b) are formed inside the receiving portions (64a, 64b) of the pipe joints (6a, 6b).
A rubber ring (66a, 66b) is mounted in the rubber ring mounting groove (65a, 65b), and the receiving portion (64a, 64b) is inserted through the rubber ring (66a, 66b). Preferably, the cable protection tube (7) is slidably inserted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. A handhole according to one embodiment of the present invention is shown in FIG. The handhole 1 shown in FIG. 1 has a box-shaped main body 2 and a cover member 3 for closing an upper end opening of the main body 2. (3 rows and 3 rows) are embedded.

[0010] As shown in FIG.
Is a bell mouth portion 41 formed in a bell mouth shape, and a step portion
And a pipe joint insertion portion 42 whose diameter is increased through 43. The end surface 411 of the bell mouth portion 41 does not protrude from the inner peripheral surface 211 of the peripheral wall 21 of the handhole 1 main body 2, and the end surface 421 of the pipe joint insertion portion 42 is connected to the outer peripheral wall 21 of the handhole 1 main body 2. Face 21
It is located slightly behind from 2. In this way, the pipe joint mounting short pipe 4 is buried in the peripheral wall 21 so as not to protrude from the peripheral wall 21 of the main body 2 of the handhole 1.

In the handhole 1 according to this embodiment, a lid 5 for closing the opening is detachably attached to the opening of the insertion portion 42 of the short pipe 4 for attaching a pipe joint.
As shown in FIGS. 2 and 3, in the lid 5,
A flange portion 52 is formed at the end of 51, and a rubber ring mounting groove 53 is provided in the middle of the body portion 51, and the rubber ring mounting groove is provided.
A rubber ring 54 is attached to 53. A handle 55 is provided at the center of the outer surface of the lid 5.

The lid 5 is attached to the opening of the pipe fitting insertion portion 42 of the short pipe 4, and the flange 52 is attached to the end face 42 of the insertion portion 42.
1, the outer surface of the lid 5 does not protrude from the outer peripheral surface 212 of the peripheral wall 21 of the main body 2 of the handhole 1.

When the handhole 1 described above is transported, the handhole 1 is provided with a short pipe 4 for fitting a pipe joint.
The duct sleeve is buried in the peripheral wall 21 and the duct sleeve is
Since it does not protrude from 21, the loading efficiency is high, and there is no risk of damaging the short pipe 4. When the handhole 1 is stored, it can be compactly stored for the same reason.

In the first stage of the cable burying work, such a handhole 1 is provided at a plurality of required places under the ground with the surface of the lid member 3 at substantially the same level as the ground. When the handhole 1 is installed in the ground in this way, the lid 5 is attached to the opening of the pipe joint mounting short pipe 4 insertion portion 42 of the handhole 1. Since the opening of the insertion portion 42 is sealed via the attached rubber ring 54,
It is possible to prevent stones, soil, mud and the like from entering the inside of the handhole 1 and water from entering.

Next, in the second stage of the cable burying work, the pipeline between the handholes 1 installed as described above is cut by a heavy machine or the like. At this time, since the pipe 4 is not protruded from the peripheral wall 21 of the main body 2 of the handhole 1, the pipe 4 is not damaged by the heavy equipment.

After completion of the above-described pipe line excavation work, the lid 5 closing the opening of the short pipe 4 insertion portion 42 of each hand joint 1 of the hand hole 1 is removed, and as shown in FIG. The pipe joint 6a is inserted into the upper and lower short tube 4 insertion portions 42, and the pipe joint 6b is inserted into the middle short tube 4 insertion portion 42.

The pipe joints 6a, 6b are provided with insertion ports 62a, 62b.
And a receiving portion 64a, whose diameter is increased through the step portions 63a, 63b.
64b, and rubber ring mounting grooves 65a, 65b are provided around the openings near the openings of the receiving portions 64a, 64b, and rubber rings 66a, 66b are formed in the rubber ring mounting grooves 65a, 65b. Is installed.

The insertion portions 62a, 62b of the pipe joints 6a, 6b
Is inserted into the short tube 4 insertion portion 42 until the end edges of the insertion portions 62a and 62b abut the step 43 of the short pipe 4 for attaching a pipe joint, and are preferably bonded in that state.

In this embodiment, the lengths of the receiving portions 64a and 64b in the pipe joints 6a and 6b are set to be the same.
The insertion portion 62a is set longer than the insertion portion 62b. Therefore, the pipe joint 6a is long and the pipe joint 6b is short. As a result, as shown in FIG.
The opening of 64b is located at the back.

After the pipe joints 6a and 6b are inserted into the short pipe 4 insertion portion 42 for pipe fitting installation as described above, the receiving portions of the pipe joints 6a and 6b are then turned on as shown in FIG. The cable protection tube 7 is connected to 64a and 64b. The pipe joint 6a of the present embodiment,
In 6b, since the distance between the steps 63a, 63b and the rubber rings 66a, 66b is set to be long, the distal end of the cable protection tube 7 is located substantially at the center of the receiving portions 64a, 64b of the pipe joints 6a, 6b. When the protective tube 7 is connected to the pipe joints 6a and 6b so as to be located, a compressive stress or a tensile stress is generated between the protective tube 7 and the handhole 1 (short tube 4) due to an earthquake or the like. However, the protection tube 7 is a receiving portion of the pipe joints 6a, 6b.
The stress can be absorbed by sliding in 64a and 64b,
The handhole 1 (short pipe 4), the pipe joints 6a and 6b, and the protection pipe 7 are prevented from being damaged.

In this embodiment, as described above, since the opening in the receiving portion 64b of the pipe joint 6b is located at the back, a plurality of cable protection pipes 7 are connected to the pipe joints 6a and 6b. It is not necessary to simultaneously insert the distal ends of all the protective tubes 7 into all the receiving portions 64a and 64b. First, insert the distal ends of the protective tubes 7 into the openings of the receiving portions 64a, and then. Port
Positioning can be easily performed, for example, by inserting it into the opening of the 64b.

The joints 6a, 6b of the cable protection tube 7
When the connection to the pipe is completed, the cut-out pipe is returned to the original state, the pipe joints 6a and 6b and the protection pipe 7 are buried, and cables are passed through the protection pipe 7.

Although the present invention has been described with reference to the drawings, the handhole of the present invention and the pipe connection structure in the handhole are not limited to the embodiments shown in the drawings.
Various changes can be made without departing from the scope of the present invention. For example, the pipe joint mounting short pipe 4 does not have to be completely buried in the peripheral wall 21 of the main body 2 of the handhole 1, but may be buried so as not to substantially protrude. Further, the insertion portion 42 of the short tube 4 may be slightly outwardly expanded and tapered, the step portion 43 of the short tube 4 may not be provided, and the lid 5 attached to the short tube 4 may be omitted. May not be required. Furthermore, the insertion portions 62a, 62b of the pipe joints 6a, 6b
May be the same, and the lengths of the receiving portions 64a, 64b of the pipe joints 6a, 6b may be set short.

[0024]

According to the present invention, there is no fear that the short pipe for fitting the pipe joint will be damaged at the time of pipeline excavation work or transportation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a handhole according to an embodiment of the present invention.

FIG. 2 is a partial sectional view of a handhole in FIG.

FIG. 3 is a perspective view of a short pipe cover for fitting a pipe in the handhole of FIG. 1;

FIG. 4 is a cross-sectional view of a pipe connection structure in a handhole according to an embodiment of the present invention.

5 is a sectional view showing a state in which a cable protection tube is connected to a pipe joint in the pipe connection structure of FIG.

FIG. 6 is a cross-sectional view of a conventional handhole, cable protection tube, and cables.

[Explanation of symbols]

 1, 1P: Hand hole 2, 2P: Main body 21, 21P: Peripheral wall 211: Inner peripheral surface 212: Outer peripheral surface 3: Lid member 4, 4P: Short pipe for fitting a pipe joint 41: Bell mouth part 411: End face of bell mouth part 42 ... Piping fitting part 421 ... Piping fitting end face 43 ... Step 44P ... Piping fitting short pipe root end 45P ... Piping fitting mounting short pipe protruding part 5 ... Lid 51 ... Body 52 ... Flange part 53 ... Rubber ring mounting groove 54 ... Rubber ring 55 ... Handle 6a, 6b ... Piping joint 62a, 62b ... Entrance part 63a, 63b ... Step part 64a, 64b ... Reception part 65a, 65b ... Rubber ring mounting groove 66a , 66b ... Rubber ring 7,7P ... Cable protection tube 8P ... Cables

Claims (6)

[Claims] At a predetermined position on a peripheral wall of a handhole body,
A handhole, wherein a short pipe for fitting fitting having a bell mouth portion and a fitting fitting portion is embedded. 2. The handhole according to claim 1, wherein a lid for closing the opening is detachably attached to an opening of the pipe fitting insertion portion of the pipe fitting mounting short pipe. 3. A short pipe for mounting a pipe joint which has a bell mouth portion and a pipe joint insertion section and is buried in a predetermined portion of a peripheral wall of the handhole body, and is inserted into the pipe joint insertion section of the short pipe. A pipe member for a handhole, comprising: 4. A handhole with a pipe joint, comprising: the handhole according to claim 1; and a pipe joint inserted into a pipe joint insertion portion of a short pipe for fitting the pipe in the handhole. . 5. A pipe joint mounting short pipe having a bell mouth portion and a pipe fitting insertion section is buried in a predetermined portion of a peripheral wall of the handhole main body, and a receiving section is inserted into the pipe fitting insertion section of the short pipe. A pipe connection structure in a handhole, wherein the insertion part of a pipe joint having a mouth part is inserted, and a cable protection tube is inserted into a reception part of the pipe joint. 6. A rubber ring mounting groove is provided around the inside of the socket of the pipe joint, and a rubber ring is mounted in the rubber ring mounting groove.
6. The pipe connection structure for a handhole according to claim 5, wherein said cable protection tube is slidably inserted into said receiving portion through said rubber ring.