JPH03230712A - wire holder - Google Patents

Abstract

PURPOSE:To prevent the inner wall of a sewer from being damaged by constituting the wire holder in such a manner that its main body of which the inner wall is provided with a wire holding part holding wires or the like is expanded radially to assume a circular form and maintains its shape under a radially acting force when inserted into a sewer pipe. CONSTITUTION:A wire holder 10 consists of a main body 12 which can be expanded for a circular shape by a force exerted in the radial direction, and maintains its shape, and a supporting section 14 provided in the inside of the main body. The supporting section 14 holds lines such as wires and conduits. The main body 12 consists of elastic belt 16 and the like. The main body 12, at an end 16b of which the supporting section 14 is formed, holds the lines and is overwrapped with the other end 16a, after being inserted into a drain C, is expanded in the radial direction, and the end 16b is secured to a nail 18. This enables preventing the wall from being damaged and easy installation of the lines when it is used with a presently installed drain.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for laying electric wires or conduits in sewer pipes, in particular in small diameter sewer pipes, and to a holder for said electric wires or said conduits.

(Prior Art) Conventionally, electric wires have been laid inside sewer pipes. The electric wire is partially inserted with an adhesive into a hole drilled near the top of a concrete pipe constituting the sewer pipe and hooked onto a fixed hook, thereby being held within the sewer pipe.

(Problem to be solved by the invention) However, when it comes to sewage pipes made of concrete pipes, especially when they are old pipes, there is a risk that cracks may develop due to perforation, or that the inner surface of the sewage pipe may become separated. This may cause water leakage, which may impair the original function of the wood pipe.

In addition, generally a large number of attachment pipes are connected to a sewer pipe, and in consideration of the presence of cracks that may occur when connecting the attachment pipes, the connection position is The hook is not attached nearby. For this reason, there is a problem in that the electric wire is forced to extend in a meandering manner within the sewer pipe.

An object of the present invention is to eliminate the need for drilling holes in the sewer pipe when installing electric wires or conduits inside the sewer pipe.

Another object of the present invention is to arrange electric wires or conduit pipes near the connection position of a mounting pipe attached to a sewer pipe.
i) To make it possible.

(Means for Solving the Problems, Functions and Effects of the Invention) A method of laying an electric wire or a conduit which is a tube for accommodating an electric wire in a sewer pipe according to the present invention is to The electric wire or the electric conduit is held in the holding part of the holder, which has a main body that can expand into a shape and maintain this state, and a holding part for the electric wire or the electric conduit located inside the main body. , including placing the retainer inside a drain pipe, and expanding the body of the retainer until it abuts the drain pipe.

According to the present invention, the holder for the electric wire laid in the sewer pipe (or the electric conduit through which the electric wire is passed) has a smaller diameter than the inner diameter of the sewer pipe in an unexpanded state, so that it is easy to transport the electric wire inside the sewer pipe. I can do it. The holder can be fixed to the lower wood pipe by expanding its main body and pressing it against the inner surface of the lower wood pipe, and the electric wire or conduit can be fixed to the lower wood pipe by a holding part provided on the main body. You can keep it. 11. Keep the city line or electrical conduit in contact with the sewer pipe! 1 and held in the sewer pipe.
1- As a result, it is possible to avoid the drilling of the drain pipe, which is indispensable in the conventional installation method, and the occurrence of cracks that may occur in the sewer pipe due to this, as well as the water leakage that accompanies this. . As mentioned above, the holder is ha
Since it is fixed to the sewer pipe by force and does not require drilling for fixing, the retainer can be placed near the joint of the mounting pipe, thereby eliminating the joint of the mounting pipe, which was previously avoided. Hold the wire near the point.”
Make it T-Noh.

As the holder for the electric wire or conduit, it is possible to use a holder having a waterproof and elastic sleeve that contacts and surrounds the main body. According to this FL nail,
This holder can be disposed at a water leakage point due to aging of the sewer pipe, and the water leakage point can be covered with the sleeve to stop water leakage.

In any of the cases described in 11 Zhuangji, an annular groove that opens on the inner peripheral surface of the sewer pipe is provided in advance, and when installing the holder, the main body or the main body and the sleeve are inserted into the annular groove. By fitting the main body or the sleeve into contact with the sewer pipe, the holder can be more firmly fixed within the sewer pipe.

The holder includes a belt-like member having a main body that is curved into a circular shape and has one end that overlaps with the other end and the other end that is located on the inside of the one end. , the tip of the other end may be configured as a lockable claw. In this case, the holding portion is provided on the inner side of the other end of the band-shaped member. For example, by disposing an inflatable bag, jack, etc. inside the strip member, and inflating the bag, a radial force can be applied to the strip member, thereby causing the circular strip member to It can be expanded to a larger diameter. During the application of the radial force, both ends of the strip member move in opposite directions, and when the radial force is released after the other end passes through the mold, the ends move due to elasticity. or in the opposite direction, and the other end engages with the claw. As a result, the expanded state of the band member is maintained.

Further, the main body of the holder may be folded into a butterfly shape.
The ring member may be comprised of six arcuate segments that are continuous or six arcuate segments that are hinged to each other. By applying a radial force to the ring member within the drain pipe, the ring member can be changed to and maintained in a circularly expanded state, which is the most stable state.

The holding portion may be a tube or a hook fixed to the main body. Alternatively, the main body may be provided with a pair of parallel cuts, and the portion between the cuts may be pushed inward of the main body and deformed.

(Example) Referring to Figure 1, sewer pipe C (Figures 5, 6 and 8)
(Fig. 13 to 16) or a conduit (not shown) consisting of a metal tube, plastic tube, flexible tube, etc., for accommodating the electric wire. An example of a holder 10 for said wire or conduit is shown, which is used to carry out the method for carrying out the method. The sewer pipe C targeted by the present invention may be either an existing pipe or a newly constructed pipe, and may be made of any material such as concrete, metal, or plastic. However, the illustrated sewer pipe C is a concrete pipe.

The holder 10 includes a main body 12 that can expand into a circular shape in response to a force in a radial direction and maintain the expanded state, and a main body 12 for holding the electric wire or conduit provided inside the main body 12. It has a holding part 14.

The illustrated main body 12 consists of a circularly curved band member 16 made of metal, plastic, etc., and claws 18 provided on the band member 16 (see FIGS. 2 and 3). Band member 1
6 has one end 16a that overlaps with each other and the other end 16b located on the inner side of the one end. The claw 18 is located on the inner side of one end 16a of the band-like member, and is capable of locking the tip of the other end 16b of the band-like member. The claw 18 shown
is formed by making a U-shaped cut in one end 16a of the band-like member and pushing out the part surrounded by the cut inward, and is open at the tip of the one end 16a. Instead of the illustrated example, the pawl 18 may be formed of a plate member bent into a crank shape and welded to the band member 16, for example.

When the strip member 16 is exposed to the blade 7j through a suitable expansion stage, such as an inflatable and deflated bag 52 (FIG. 13), a liquid jug (not shown), etc., both ends of the band member 16 are exposed. 16a, 16b and r7 move in the opposite direction, and the diameter of the strip member 16 increases. After the other end 16b rides on the claw 18 and then contacts the one end 16a again, when the radial force is released, the other end 16b moves oppositely under the guidance of the one end 16a due to the elasticity of the strip member 16. A portion of the tip thereof is inserted between the claw 18 and one end 16a, and abuts against the claw 18. As a result, the other end portion 16b is engaged with the claw 18, whereby the band member 16 is maintained in its expanded state. In carrying out the laying method of the present invention, the outer diameter of the strip member 16 in the expanded state is set to be approximately equal to the inner diameter of the lower wood pipe (see Fig. 5!]<4.). As a result, the strip member 1
6 is in contact with the drain pipe, and the holder 10 is fixed to the drain pipe so as not to rotate around the axis of the drain pipe or move in the axial direction.

The holding portion 14 is provided on the inner side of the other end portion 16b of the band-like member. The illustrated holding portion 14 is made of a tube made of the same material as the strip member 16, is disposed in the axial direction of the strip member 16, and is welded to the strip member 16. The wire or conduit is passed through the tube and held there. Instead of configuring the holding part 14 with the tube,
For example, as a hook (FIG. 2), or as a strip member 16.
A pair of parallel notches extending in the circumferential direction may be provided in the strip member 16, and the portion between the cuts may be pushed inward to deform the strip member 16 (FIG. 3). Alternatively, as provided in the ring member 22 which will be described later, a hat-shaped cross-sectional member extending in the direction of the axis 17 of the ring member 22 may be used.

1. Another example of the main body 12 of the holder 10 is shown in FIG. The body 12 in this example consists of six interconnected six pieces folded into a butterfly shape.
It consists of a ring member 22 having two circular arc parts 20. The six arcuate portions 20 are defined by three pairs of notches 24 provided at the upper position, lower position, and intermediate position in FIG. 4 and extending in the axial direction of the ring member 22. The pair of notches 24 are located on the ring member 22.
A pair of notches 24 at an intermediate position are open to the inner surface of the ring member 22. For this purpose, the two pairs of arcuate portions 20 are folded inward along the pair of notches 24 at the intermediate position. Instead of the circular arc portions being connected to each other, a ring member (not shown) comprising six arcuate segments hinged to each other may be used. When a radial force is applied to the ring member 22, the ring member 22 changes to a circular expanded state (see FIG. 6). The circular expansion state is the most stable state, and therefore this state will be maintained unless centripetal H forces exert themselves.

The ring member 22 is also preset so that its outer diameter is approximately equal to the inner diameter of the drain pipe, so that the expanded ring member 22 can contact the lower pipe by 1°. Both of the hat-shaped cross-sectional members are made of the same material, for example metal or plastic material. The hat-shaped cross-sectional member can be fixed to the inner surface of the ring member 22 by welding.

Furthermore, referring to FIGS. 7 and 8, the retainer 1
0, it may include a sleeve 26 having waterproof and elastic properties that contacts and surrounds the main body 12 (in the illustrated example, a band-like member 16 similar to that shown in FIG. 3). According to the holder 10 provided with the sleeve 26, the main body 12 can be expanded to press the sleeve 26 against the crack occurrence site of the sewer pipe C and cover the site, thereby preventing water leakage from the site. be able to.

Next, with reference to FIGS. 9 to 16, a description will be given of a method for laying electric wires according to the present invention, which is applicable to water pipes of small diameters that only workers can enter.

The laying method of the present invention basically consists of the following steps:
4 to hold the electric wire, and the holder 10 is placed inside the plurality of water pipes C connected to each other (Fig. 13), and then,
The main body 1 until the main body 12 of the holder 10 comes into contact with the water pipe C.
2 into a circular shape (Fig. 14).
However, in the illustrated example where sewer pipe C is an existing pipe,
In order to remove dirt from the inner circumferential surface of the drain pipe C in advance, as shown in FIG. It is advisable to wash it. In the illustrated example, the washer 30 is inserted into a sewer pipe C through one of a pair of manholes M (the right manhole in the figure), and is not supplied with high-pressure water from a high-pressure water supply vehicle 32 on the ground. Move from to the other manhole M (left manhole).

Furthermore, as shown in FIG. 10, between the two manholes M, a TV camera 36 that can move inside the sewer pipe C was used to photograph the circumferential surface of the cleaned water pipe C.
It is advisable to confirm whether or not you have a job. The situation inside the sewer pipe C can be monitored at the television receiver 42 electrically connected to the motor vehicle 40.

Next, as shown in FIG. 11, the width of the main body 12 of the holder, for example, is such that the holder 10 can be inserted into the inner peripheral surface of the drain pipe C at intervals in the axial direction of the drain pipe. A plurality of annular grooves 44 are formed having a width dimension slightly larger than the width dimension and a depth dimension slightly larger than the thickness dimension of the main body. In the illustrated example, the annular groove 44 is formed at the connection location of the sewer pipe C, or may be formed at another location.

The annular groove 44 is also formed in a region including the crack occurrence location 38. The annular groove 44 can be formed using a grinding device 46 having a disc-shaped rotating grinder. The grinding device 46 is connected to the television camera 36 via lobes 48.50.
and a winch 49 installed at the top of the other manhole M. The grinding device 46 is moved to a predetermined position above the television camera 36. During the grinding operation by the grinding device 46, the grinding position is set by the TV camera 36. However, this can be done remotely without supervision. The winch 49 is used to remove the forming edge of the annular groove 44 and the grinding device 46 separated from the television camera 36.

After that, to remove the grinding waste, preferably drain pipe C
The inside is cleaned using the washer 30 (12th VA).

Next, as shown in FIG. 13, the expander 52 is lowered into the sewer pipe C from the other manhole M and left on standby.

The expander 52 has a cylindrical shaped bag oriented in the axial direction of the sewer pipe C, which expands upon being supplied with compressed air from the power vehicle 40 on the ground.

The expander 52 is also connected by a lobe 53 to the television camera 36 for towing and monitoring thereof. That contact,
Lower the required number of holders 10 into the sewer pipe C from the other manhole M, pass the electric wires attached to the above-ground ropes 54 through the holding parts 14 of all the holders io, and lower one holder 10. is placed on the expander 52 so as to surround the bag body of the expander 52. Thereby, the holder 10 is placed so that its axis is parallel to the axis of the sewer pipe C. Further, at this time, the holding part of the holding tool 10 is positioned upward so that only the electric wire is placed near the top of the sewer pipe C.

When there is a water leakage point 38 in the installation section of the holder 10, the holder 10 (FIG. 7) having the sleeve 26 is prepared.

As shown in FIG. 14, the holders 10 are sequentially installed in the annular groove 44 from the one manhole M side to the other manhole M side.

More specifically, the expander 52 on which the negative holder 10 is placed
is pulled to the right in the figure by the television camera 36, and the holder 10 is placed at a predetermined position where the annular groove 44 is formed, that is, in a space surrounded by the annular groove 44. The retainer 10 is then supplied with compressed air via the air tube 56.
The body of the pipe C is expanded, so that the body with increased diameter fits into the annular groove 44 and contacts the circumferential surface defining the annular groove 44 of the body or the sleeve C. −
After installing the holder 10, the air is expelled from the bag of the expander 52, and the winch 49 is operated to pull the expander 52 and the television camera 36 to the left. Thereafter, the above operations are repeated to complete the installation of all the holders 10.

Thereafter, the television camera 36 is run to confirm the installation status of the holder 10 (FIG. 15). In this way, the electric wire is indirectly fixed to the water pipe C via the plurality of holders 10, and thereby the electric wire is laid inside the sewer pipe C. The wires between the manholes in the pair of valleys are later connected to each other (FIG. 16).

In order to lay the electric wire later, for example, a flexible electric conduit (not shown) is passed through the holding part of the holder 10 instead of the electric wire, and the electric wire is laid in the same manner as in the laying of the electric wire. Can you lay pipes? The electric conduit may be a rigid tube without flexibility. In this case, for example, a plurality of short pipes are connected within the manhole M to form the rigid pipe.

Alternatively, the holder 10 may be directly fixed to the sewer pipe C that has or has not been cleaned, without forming the annular groove 44. When the annular groove 44 is formed, the holder 10 is fitted into the annular groove 44, so there is an advantage that the resistance of sewage water is small.

In the illustrated example, the method and retainer of the present invention may be used in small-diameter sewer pipes, or may be applied to large-diameter sewer pipes that may be accessed by workers.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a holder according to the present invention, FIGS. 2 and 3 are partial elevational views of other examples of holders with different holding parts,
Fig. 4 is a perspective view of another example of a holder with a different main body;
6 are cross-sectional views of the holder shown in FIG. 1 and the holder shown in FIG. 4 installed in a sewer pipe;
8 and 8 are cross-sectional views of other examples of a holder having a sleeve, and the holder when placed in a sewer pipe, FIGS. 9, 10, 12, 13, and 14. Figures 15-1 and 16 show the order of laying electric wires [
This is a diagram. 10, holder, 12 main body, 14: holding part, 16 band-shaped member, 18 claw,
22. Ring member, 24 notches,
26. Sleeve, 44: Annular groove, C: Sewer pipe, L, Electric wire.

Claims (12)

[Claims] (1) It has a main body that can expand into a circular shape and maintain the expanded state in response to a force in a radial direction, and a holding part for an electric wire or conduit provided inside the main body. The holding part of the holder holds the electric wire or the electric conduit, the holder is placed inside a sewer pipe, and the main body of the holder is shaped into a circular shape until the main body of the holder comes into contact with the sewer pipe. A method of laying electrical wire or conduit within a sewer pipe, including spreading it out. (2) Forming an annular groove that opens on the inner peripheral surface of the sewer pipe, and providing a main body that can expand into a circular shape and maintain the expanded state in response to a force in a radial direction, and an inner surface of the main body. holding the electric wire or the electric conduit in the holding part of the holding tool, which has a holding part for the electric wire or the electric conduit, and placing the holding tool in a space surrounded by the annular groove of the sewer pipe. A method for laying an electric wire or conduit into a sewer pipe, the method comprising: expanding the body of the retainer into a circular shape until the body fits into the annular groove and abuts the sewer pipe. (3) According to claim (1), the holder further includes a sleeve having water-stop properties and elasticity surrounding the main body, and the main body is expanded until the sleeve abuts the sewer pipe. Laying method described. (4) The holder further has a waterproof and elastic sleeve that is in contact with and surrounds the main body, and the main body is expanded until the sleeve fits into the annular groove and comes into contact with the sewer pipe. The laying method according to claim (2). (5) A holder for holding electric wires or conduits in a sewer pipe, which includes a main body that can expand into a circular shape and maintain the expanded state in response to a force in a radial direction, and an inner part of the main body. A holder having a holder provided on one side and through which an electric wire or conduit can be passed. (6) A holder for holding electric wires or conduits in a sewer pipe, which is capable of expanding into a circular shape in response to a force in a radial direction and maintaining the expanded state, and the inside of the main body. 1. A holder comprising: a holder provided in the main body through which an electric wire or conduit can pass; and a water-stopping and elastic sleeve surrounding the main body and in contact with the main body. (7) The main body includes a band-shaped member that is curved in a circular shape and has one end that overlaps with another and the other end that is located on the inside of the one end, and the other end that is provided on the inside of the one end. According to claim (5) or (6), the tip of the end portion has a hook that can be locked, and the holding portion is provided on the inner side of the other end portion of the band-shaped member. Retainer as described. (8) The main body has 6 pieces connected to each other folded into a butterfly shape.
Claim (5) Consisting of a ring member consisting of two circular arc parts.
Or the holder described in (6). (9) The holder according to claim 5 or 6, wherein the main body comprises a ring member consisting of six arcuate segments hinged to each other and folded into a butterfly shape. (10) The holder according to claim 5 or 6, wherein the holder is made of a tube fixed to the main body. (11) The holder according to claim 5 or 6, wherein the holder comprises a hook fixed to the main body. (12) The holding portion is formed by providing a pair of parallel cuts in the main body, and pushing out and deforming the part between the cuts inward of the main body. Retainer.