JPH09284963A - Connection unit for multi-holes conduit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection unit which is used for turning the direction of the holes of a multi-holes conduit which consists of a number of connected multi-holes block which are made of concrete and having a plurality of parallel holes, respectively. SOLUTION: A connection unit is composed of a plurality of resin pipes 13 and a connection block 15 which holds the one side ends of the resin pipes 13. As the resin pipes 13 having flexible corrugated pipe parts 13a, they can be beat. The connection block 15 holds the straight pipe parts 13b of the resin parts 13. Therefore the spacings between the corrugated pipes 13a can be reduced and the block can be compact. As the flange-shaped stoppers 13c of the resin pipes 13 are retained by the recess trenches 21 of the connection block 15, the resin pipes 13 are not drawn out of the connection block 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perforated conduit connection unit which is suitable for use in a part of a perforated conduit which is composed of a perforated block having a plurality of holes and whose direction is changed. .

[0002]

2. Description of the Related Art Conventionally, a cab system has been used for underground electric wires in an urban area. In this method, a concrete U-shaped block is laid by digging a groove on the sidewalk, etc., and a shelf is made in it to store electric and communication wires, covered, covered with soil, and buried. It is to do. However, this method is disadvantageous in that it is large and expensive, and a method of burying a porous pipe (CCBOX) made of concrete or pottery in the ground has recently been studied.

A perforated pipeline is formed by connecting a number of perforated blocks 1 made of concrete or earthenware as shown in FIG. The porous block 1 has a plurality of parallel holes 2 for drawing electric wires. The perforated pipeline using such a perforated block 1 is very compact as a pipeline for drawing a large number of electric wires because the intervals between the holes can be narrowed, and the amount of excavation for burying can be small. There is.

[0004]

However, there is a problem in that the perforated conduit cannot be bent because it is not flexible. Therefore, use of a trapezoidal block 3 made of concrete or ceramic as shown in FIG. This trapezoidal block 3 has the same number and arrangement of the holes 2 as the perforated block 1 of FIG. 8 and has both end faces having an appropriate angle. If several such blocks 3 are connected, the bent portion of the perforated conduit can be formed. However, the condition (curvature, etc.) of the curved part of the pipeline varies depending on the site, so in order to be able to handle all curved parts, there are numerous types of trapezoidal shapes with different angles on both end faces. It is necessary to prepare blocks. This not only increases the cost but also makes the on-site work very troublesome.

Further, the distance between the holes of the perforated conduit is much smaller than the distance between the conduit openings of the manhole and the handhole because it is necessary to make the perforated conduit as compact as possible.
The perforated conduit cannot be directly connected to a manhole or the like. For this reason, when connecting a perforated pipeline to a manhole or the like, the use of a horn-shaped block 4 for widening the interval between the holes 2 as shown in FIG. 10 has been studied. However, the horn-shaped block 4 is difficult to manufacture because the directions of the individual holes 2 are different. Even when the horn-shaped block 4 is used, it is necessary to prepare an extremely large number of types because the distance between the conduit openings of the other party such as a manhole is not constant, which results in high cost and difficult construction work. is there.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a connection unit for a perforated pipeline which can easily cope with various changes in the direction of holes in a perforated pipeline using a perforated block. It is in.

[0007]

That is, the perforated conduit connection unit according to the present invention is used by being attached to a perforated conduit constituted by a perforated block having a plurality of holes, and a plurality of resins. A pipe and a connection block that is butt-connected to the end surface of the perforated block while holding one end side of these resin pipes in the same arrangement as the holes of the perforated block, and the resin pipe is flexible. A straight pipe part is integrally formed on one end side of a corrugated pipe, and a flange-shaped stopper is integrally formed on the straight pipe part.The inner diameter of the straight pipe part is almost the same as the minimum inner diameter of the corrugated pipe. The outer diameter of the collar-shaped stopper is smaller than the maximum outer diameter of the corrugated pipe, and the connection block is designed to grip the straight pipe portion of the resin pipe, and the collar-shaped stopper is provided on the gripping surface. Consisting of those obtained by forming a recessed groove enters, characterized in that. The connection block is preferably made of resin in terms of weight, but concrete ones, earthenware ones or the like can also be used.

In this connection unit, the corrugated pipe portion of the resin pipe has flexibility. Therefore, it is possible to easily change the direction of the hole by connecting the connecting block to the porous block at the end of the perforated pipeline and then connecting another flexible corrugated pipe to the tip of each corrugated pipe. Is possible. In addition, since the connection block is designed to grip the straight pipe part whose outer diameter is smaller than the maximum outer diameter of the corrugated pipe, the gap between the corrugated pipes can be made sufficiently smaller than when directly gripping the corrugated pipe. And it is easy to match the pore spacing of the porous block. In addition, when the straight pipe part is gripped by the connection block, the collar-shaped stopper of the straight pipe part will enter the concave groove of the connection block.
The resin pipe does not pull out from the connection block.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

[Embodiment 1] FIGS. 1 to 4 show an embodiment of the present invention. The perforated conduit connection unit 11 is a resin pipe 1.
3 and a connection block 15. The number of resin pipes 13 is the number of holes 2 in the porous block 1 (see FIGS. 2 and 3).
Is the same as the number (4 in this example). The connection block 15 holds one end side of the four resin pipes 13 in the same arrangement as the holes 2 of the porous block 1.

In the resin pipe 13, a straight pipe portion 13b is integrally formed on one end side of the corrugated pipe 13a, and the straight pipe portion 13 is formed.
The collar-shaped stopper 13c is formed integrally with b. The inner diameter of the straight pipe portion 13b is almost the same as the minimum inner diameter of the corrugated pipe 13a (the inner diameter of the corrugated crest portion envelope surface of the inner surface), and the outer diameter of the collar-shaped stopper 13c is the corrugated pipe 13a.
It is made smaller than the maximum outer diameter of a (outer diameter of the undulating peak crest envelope surface). Such a resin pipe 13 can be manufactured by molding a part of the resin pipe 13 into a straight pipe with a flange-shaped stopper when manufacturing the corrugated pipe. The wall thickness of the straight pipe portion 13b is approximately the same as or slightly larger than the wall thickness of the corrugated pipe 13a. Therefore, the outer diameter of the straight pipe portion 13b is considerably smaller than the maximum outer diameter of the corrugated pipe 13a.

On the other hand, since the connection block 15 holds the resin pipes 13 arranged in the upper and lower two stages, the upper block 15a and the middle block 1 as shown in FIGS. 2 and 4.
5b and the lower block 15c, which are integrated by tightening these blocks with through bolts 17 (see FIG. 4). The upper, middle, and lower blocks 15a to 15c each have a mating surface 1 with a semi-circular cross section for gripping the straight pipe portion 15b of the resin pipe 15 on the mating surface.
9 is formed. As shown in FIGS. 2 and 3, the grip surface 19 is formed with a concave groove 21 into which the flange-shaped stopper 13c of the straight pipe portion 13b is inserted. Therefore, when the straight pipe portion 13b of the resin pipe is gripped by the connection block 15, the flange-shaped stopper 13c falls into the groove 21 and the resin pipe 13 cannot be pulled out from the connection block 15.

The outer diameter of the straight pipe portion 13b is the wavy pipe 1
Since it is considerably smaller than the maximum outer diameter of 3a, even if the interval between the adjacent corrugated pipes 13a is quite small, as shown in FIG.
It is possible to secure a margin to pass through. Therefore, the interval between the corrugated pipes 13a can be made sufficiently small in accordance with the interval between the holes 2 of the porous block 1.

As shown in FIGS. 1 and 4, the connection block 15 is connected to the perforated block 1 by a bolt 23 inserted through the middle block 15b in the same direction as the resin pipe 13. It is advantageous in cost to manufacture the connection block 15 by injection molding or the like using waste plastic.

Further, the connection block 15 has a protective cover portion 2 surrounding the portion of the corrugated pipe 13a near the straight pipe portion 13b on the tip side of the portion of the resin pipe for holding the straight pipe portion 13b.
4 is integrated. The protective cover portion 24 has an inner diameter slightly larger than the maximum outer diameter of the corrugated pipe 13a so as not to tighten the corrugated pipe 13a. If such a protective cover portion 24 is provided, when the corrugated pipe 13a is bent, the corrugated pipe 13a is
There is no risk of stress concentration on the boundary between the straight pipe portion 13b and the straight pipe portion 13b, and damage to the resin pipe 13 can be prevented.

FIG. 5 shows an example of a usage state of the perforated pipeline connection unit 11 configured as described above. This example
This is a case where the perforated conduit 5A and the perforated conduit 5B oriented in a direction substantially perpendicular to this are connected. The perforated conduits 5A and 5B are each configured by connecting a large number of perforated blocks 1. For example, as shown in FIG. 6, the porous blocks 1 are connected by bolts 6 inserted into the porous blocks 1 on the end side.
Is screwed into the head portion 7 of the bolt 6 inserted into the adjacent porous block 1.

When connecting the porous conduits 5A and 5B having different directions, first, the connecting unit 11 of this embodiment is connected to the porous block 1 at each end. This connection is shown in Figure 6.
As shown in FIG. 4, with the end surface of the connection block 15 abutted against the end surface of the perforated block 1, the bolt 23 inserted into the middle block 15b is screwed into the head 7 of the through bolt 6 inserted into the perforated block 1. Can be done by. If the connection unit 11 is made of resin, it is relatively lightweight, and the connection work with the porous block 1 can be easily performed.

Thereafter, a flexible plastic corrugated pipe 25 is placed between the corresponding corrugated pipe 13a, and the corrugated pipe 13a and the corrugated pipe 25 are joined together by a pipe joint 27.
Connect with Corrugated pipe 13a and corrugated pipe 25
Are preferably the same size and the same material. Since the corrugated pipe 13a is flexible, the corrugated pipe 25 can be easily connected by bending the corrugated pipe 13a appropriately.

As is clear from the above description, by using the connection unit 11 of this embodiment, it is possible to flexibly cope with the case where the angles of the perforated pipelines 5A and 5B, the distance between the end portions, the curvature of the bent portion, etc. are different. You can

Next, another usage state of the connection unit 11 of this embodiment will be described with reference to FIG. This usage state is an example in which the perforated conduit 5 is connected to the manhole 29. Since the distance between the holes of the perforated conduit 5 is smaller than the distance between the conduit openings 31 of the manhole 29, the connection unit 11 of this embodiment is used to adjust this difference. The perforated conduit 5 is configured by connecting a large number of perforated blocks 1, and the connection unit 11 is connected to the perforated block 1 at the end portion, as in the case of FIGS. 5 and 6.

After the connection unit 11 is connected to the porous block 1, a flexible plastic corrugated pipe 2 is provided by a pipe joint 27 at the tip of each corrugated pipe 13a.
5 and connect the end of the corrugated pipe 25 to the manhole 29
It may be connected to the conduit opening 31 of. Thus, by using the connection unit 11 of the present embodiment, it is possible to flexibly cope with the case where the intervals of the conduit openings 31 of the manhole 29 are different.

[Second Embodiment] In the first embodiment, the tip positions of the corrugated pipes 13a are the same, but the tip positions of the corrugated pipes 13a can be displaced in the pipe longitudinal direction. By doing so, the position of the pipe joint 27 attached to the tip of the corrugated pipe 13a is displaced in the longitudinal direction of the pipe, which has the advantage of facilitating the connection work between the corrugated pipe 13a and the corrugated pipe 25.

[0022]

As described above, by using the connection unit of the present invention, it is possible to easily change the direction of the perforated pipeline according to the situation at the site. Also, by providing a straight pipe part on one end side of the corrugated pipe, it is possible to reliably grip the straight pipe part of the resin pipe with the connection block even if the interval between the corrugated pipes is sufficiently small, and the connection block It can be made compact according to the porous block.
Further, when the straight pipe portion of the resin pipe is gripped by the connection block, the flange-shaped stopper of the resin pipe enters the concave groove of the connection block, so that the pull-out of the resin pipe can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a perforated conduit connection unit according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG. 1;

FIG. 4 is a cross-sectional view taken along the line CC of FIG.

FIG. 5 is a plan view showing an example of a usage state of the connection unit of FIG.

6 is a cross-sectional view showing a connection state between the connection unit of FIG. 1 and a porous block.

FIG. 7 is a plan view showing another usage state of the connection unit of FIG.

FIG. 8 is a perspective view showing an example of a perforated block.

FIG. 9 is a cross-sectional view showing a trapezoidal block used for a bent portion of a perforated pipeline.

FIG. 10 is a cross-sectional view showing a horn-shaped block used in a portion where the hole interval of the perforated conduit is widened.

[Explanation of symbols]

 1: Porous Block 2: Holes 5, 5A, 5B: Perforated Pipeline 11: Perforated Pipeline Connection Unit 13: Resin Pipe 13a: Corrugated Pipe 13b: Straight Pipe Portion 13c: Collar-shaped Stopper 15: Connection Block 17: Through Bolt 19: Grip surface 21: Recessed groove 24: Protective cover part 25: Corrugated pipe 27: Pipe joint 29: Manhole 31: Pipe opening

Claims (2)

[Claims] 1. A unit used by being attached to a perforated conduit (5) constituted by a perforated block (1) having a plurality of holes (2), comprising a plurality of resin pipes (13) and these. The one end side of the resin pipe (13) is provided with the hole (2) of the porous block (1).
The perforated block (1) in the state of being gripped in the same arrangement as
The resin pipe (13) is formed by integrally forming a straight pipe portion (13b) on one end side of a flexible corrugated pipe (13a). , A flanged stopper (13c) on the straight pipe part (13b)
The inner diameter of the straight pipe portion (13b) is almost the same as the minimum inner diameter of the corrugated pipe (13a), and the outer diameter of the collar-shaped stopper (13c) is the maximum of the corrugated pipe (13a). The connecting block (15) is smaller than the outer diameter, and the connecting block (15) has a straight pipe portion (1
3a) is to be gripped and its gripping surface (1
9. A connection unit for perforated pipelines, characterized by comprising a concave groove (21) in which a collar-shaped stopper (13c) is formed in 9). 2. The connecting block (15) is provided with a straight pipe portion (1) at a tip end side of a portion for holding the straight pipe portion (13b) of the resin pipe.
3. The connection unit for perforated pipelines according to claim 1, further comprising a protective cover portion (24) integrally surrounding a corrugated pipe (13a) portion near 3b).