JP2007228772A - Tool and method for laying electrical cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an appliance and method for wiring electrical cables, capable of smoothly and properly laying a plurality of electric cables to a conduit piped in a building. <P>SOLUTION: The appliance 1 for wiring the electrical cables is constituted of an insertion pipe portion 2, formed by a tapered tube 21 fitted in an opening end portion of a conduit 101 so as to be inserted freely and a tapered tubular body 31, and has a wire guide portion 3, provided by jointing and fixing at the base end of the insertion pipe portion and a cable-aligning portion 4, secured inside the guide portion 3. The cable aligning portion 4 has a plurality of guide portions 41 for aligning cables formed by through holes 41a, in which the electrical cables can be inserted. The electrical cables are inserted into the through holes one by one and are led through from the top end of the tapered rod, the respective lead-through end portions of the electrical cables are jointed by the end portion of an electrical cable traction guide line 111, the tapered rod is fitted in the opening end portion of the conduit, and the guiding line is dragged, and is made electrically continuous. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wire passing device and a wire passing method used when passing a wire through a conduit. More specifically, the wire connections used when passing multiple wires such as IV wires, cords, or cables with insulation coating on the conduit piped in buildings, condominiums, and other various structures. The present invention relates to an appliance and a method for wiring electric wires.

  Conventionally, when a plurality of electric wires are passed through the conduit, the construction method (wire passing method) shown in FIGS. 11 and 12 is generally employed. Hereinafter, a conventional wiring method will be described with reference to FIG. In FIGS. 11 and 12, 101 is a conduit pipe piped to various buildings 102, 103 is a wall, 104 and 105 are installation parts for installing switches, outlets, distribution boards, and the like. 106 and 107 are installed. The conduit 101 is connected between the boxes 106 and 107 of both installation parts. 108, 109, 110 are wires to be connected, 108a, 109a, 110a are wound wires of the wire wound in a ring shape, etc. 111 is a wire pulling lead wire (generally referred to as “bending wire”) 112 and 113 indicate workers. The leading wire 111 is made of a metal wire.

  Therefore, conventionally, the employee 112 enters the wire pulling lead wire 111 into the opening end of the conduit 101 from one installation portion 104 side, and passes through the tube 101 while pushing the wire 111, so that the other installation portion 105 is inserted. Connect to the side. Then, the worker 113 on the other installation section 105 side attaches the end portions of the electric wires 108, 109, 110 to the tip end portion of the wire 111 pushed out from the other opening end portion of the conduit tube 101 by means of a binding 116 or the like. After the connection (joint), the worker 112 on one side pulls the lead wire 111 so that each electric wire passes through the conduit 101. In this case, the worker 113 on the other side pulls out each electric wire from the wound body of the electric wire and performs the feeding work in accordance with the drawing timing of the wire 111 by the employee 112 on the towing side.

Conventionally, the line work is performed by the method described above. However, this conventional wiring method (hereinafter referred to as “conventional method”) has the following problems.
(1) Problems at the time of entry into the conduit According to the conventional method, as shown in FIG. 12 a, the wire contacts the peripheral edge of the open end 101 a of the conduit 101 and is pulled while being slid in the tube 111. Is lined. Therefore, the insulation of the electric wire is reduced due to overload on the contact surface, the electric wire coating (the insulating coating 115 covering the conductive wire 114) is damaged, the electric wires or the electric wire and the electric pipe are fused with each other due to frictional heat. In this case, since the conventional method is carried out without straightening the wire when entering the pipe, the wires are twisted or entangled and connected while being in this state. Many fusing phenomena occur.
(2) Problems at the bent part in the electric pipe Since the electric pipe connects the installation part such as a switch, an outlet, and a distribution board, the bent part of the electric pipe is necessarily at least two places. The load applied when the wire passes through the bent portion is larger on the inner side, and both the load factor and the friction coefficient increase, resulting in electrical effects such as a decrease in insulation and a decrease in conductivity.
(3) Problems due to the use of a line lubricant Since the conventional method enters the wires without adjusting the wires as described above, the wires are twisted or entangled. For this reason, an excessive force is applied to the electric wire due to an increase in frictional resistance when the wire is connected, and the wire connection operation may not be performed smoothly. Therefore, in the case described above, in the conventional method, wiring is performed using a line lubricant, but if a large amount of lubricant enters the conduit, it is easy to harden due to deterioration over time, repair work, etc. In this case, when the electric wire is removed from the conduit, the rubber-like lubricant is frequently obstructed and cannot be removed.

In addition, as a conventional wire-related invention, a flexible rod guide tube is connected to the open end of an underground conduit (underground tube) opened in the hand hole, and the wire rod is passed through the guide tube. Techniques for connecting to underground pipes have been proposed (see, for example, Patent Document 1). According to this invention, the workability | operativity of the rod wiring operation | work which inserts a wiring rod in an underground pipe line can be improved.
However, the above-described invention is to pass one wire rod to the underground conduit, and solve the problems (1) to (3) described above by connecting a plurality of wires to the conduit of the building. At present, the technology that can be connected is not yet proposed.
JP-A-9-65538

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a wire passing device and a wire passing method capable of solving the problems (1) to (3). Is.

In order to achieve the above object, one of the present inventions (first invention) is a wire wiring device used when a plurality of wires are passed through a conduit piped in a building. And
An insertion tube portion that can be removably inserted into the opening end portion of the conduit tube, a wire guide portion that is connected and fixed to the proximal end of the insertion tube portion, and an adjustment portion that is fixed and provided in the guide portion. Line part,
The insertion tube portion is composed of a tapered tube body that opens at both ends and has a taper that increases in diameter from the distal end side toward the proximal end side,
The wire guide portion is configured by a tapered cylindrical body that opens at both ends and has a taper that increases in diameter from the connection end side toward the base end side,
The straightening section includes a plurality of straightening guide sections through which the electric wire can be inserted. In this specification, “electric wire” is used as a concept including all IV electric wires, cords, cables and the like that have been coated with insulation. The “building” includes a building, a condominium, and various other buildings.

  The wire passing instrument of the present invention is to insert one wire through the wire guide into the straight line guiding portion and lead it out from the tip of the insertion tube portion, and each lead-out end portion of the wire pulling lead wire Connect to the end by binding. Next, after inserting the insertion tube portion into the opening end portion of the conduit tube, the leading wire is pulled and passed.

  Another invention of the present invention (second invention) is the wire wiring instrument according to the first invention, wherein the wire-straightening portion has an outer peripheral portion fixed to the inner wall surface of the tapered tubular body. A plurality of insertion holes into which the electric wires can be inserted are provided in the provided plate-like body, and each of the wire guiding guide portions is formed of each of the insertion holes.

  Another invention of the present invention (third invention) is the wire passing device according to the first or second invention, wherein the wire guide portion has a center line of each plug tube portion. A curve portion that curves with an arbitrary curvature is formed.

  Among the present inventions, yet another invention (fourth invention) is the wire passing device of any one of the first to third inventions, wherein the tapered tubular body of the wire guide portion is an arbitrary one. It is made of a flexible metal material that can be bent with a curvature.

  Among the present inventions, still another invention (fifth invention) is a plurality of wire conduits piped in a building using the wire passing device of any one of the first to fourth inventions. A wire passing method for passing two wires, wherein a required number of wires to be passed through the conduit are connected from the base opening side of the wire guide portion to the wire guide portion of the wire guide portion. After being inserted into the book and led out from the tip of the insertion tube portion, each lead-out end portion of the electric wire is connected to an end portion of a wire pulling lead wire by binding or the like, and then the insertion tube portion is connected to the electric wire After engaging with the open end of the tube, the leading wire is pulled to pass through.

  The present invention has the following effects. (1) Since the wire is inserted without contacting the peripheral edge portion of the open end of the conduit, damage to the insulation coating during entry can be prevented. (2) Since the electric wires are lined and inserted at the line-shaping portion, the electric wires can be smoothly and smoothly routed without being twisted or tangled. (3) By adjusting the electric wire, the resistance load applied to the electric wire at the time of wiring is reduced. Therefore, the pulling force that pulls the wire pulling leading wire can be reduced, and as a result, the load applied to the wire can be reduced. (4) The wiring work can be easily performed without using a wiring lubricant. (5) By not using a lubricant, curing of the lubricant and curing of the electric wire can be prevented, so that the work of pulling out the electric wire from the conduit tube during repair work or the like becomes easy.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view (a) and a longitudinal sectional view (b) showing an embodiment of a wire passing device of the present invention, FIG. 2 is an enlarged longitudinal sectional view showing a straightening portion, and FIG. FIG. 4 is an explanatory view showing another connecting means for connecting the insertion tube portion to the electric wire tube, and FIG. 5 is an open end of the electric wire tube. FIG. 6 and FIG. 7 are explanatory diagrams showing the process of constructing a wiring operation using the same wire wiring instrument as above, FIG. In FIG. 7, the explanatory view which expands and shows the part which entrapped the instrument for electric wire connection in the electric conduit, FIG. 9 is an effect explanatory view in the bending part in the electric conduit of the electric wire to be connected. In these drawings, the same components as those already described in the conventional method of the background art section are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 1 to FIG. 9, the wire passing device 1 of this embodiment (Embodiment 1) has a plurality of wires 108, 109, 110 passed through a conduit 101 piped to a building 102. It is an instrument for wire connection used when doing. The wire connecting instrument 1 includes an insertion tube portion 2 that can be removably inserted into an opening end portion 101 a of the conduit tube 101, and an electric wire guide portion 3 that is connected and fixed to the proximal end of the insertion tube portion 2. And a straightening section 4 fixedly provided in the guide section 3.

  The insertion tube portion 2 includes a tapered tube body 21 having both ends opened and a taper that increases in diameter from the distal end 21a side toward the proximal end 21b side. The taper angle of the tube body 21 is set appropriately. The material of the tapered tube body 21 is not particularly limited, and examples thereof include metal materials such as stainless steel and hard plastic materials. In the first embodiment, a metal material such as stainless steel is employed. In the first embodiment, the silicon coating layer 22 coated with silicon is formed on the entire inner peripheral wall surface of the tapered tube body 21 (see FIG. 3). This coating layer 22 is formed as desired.

The wiring device 1 according to the present invention is used by inserting the insertion tube portion 2 into the opening end portion 101a of the conduit tube 101 when constructing the wiring operation. The diameter of the conduit tube is generally about 16 mm to 31 mm.
An example is shown in FIG. The conduits 101, 101A, 101B in the figure have different diameters. That is, the diameter of the conduit shown in FIG. 5 is configured such that tube 101 <tube 101A <tube 101B.

  As described above, conduits having different diameters are used. In the present invention, since the insertion tube portion 2 is constituted by the tapered tube body 21, it is possible to correspond to a conduit tube having a different diameter depending on the engagement degree (insertion depth) of the insertion tube portion 2. The range that can cope with the diameter difference of the conduit tube can be adjusted by the taper angle of the insertion tube portion 2. Note that the wire passing device 1 can also be configured by class, such as for small diameter, large diameter, and intermediate diameter.

The wire guide portion 3 is configured by a tapered cylindrical body 31 that is open at both ends and is provided with a taper that increases in diameter from the distal end 31a (connecting end to the tubular body 21) side to the proximal end 31a side. . The diameter of the cylindrical body 31 on the distal end 31 a side is formed to a size that matches the diameter of the proximal end 21 b of the tapered tubular body 21. Although the material of the said cylindrical body 31 is not specifically limited, Metal materials, such as stainless steel, a hard plastic material, etc. can be mentioned. In the first embodiment, a metal material such as stainless steel is employed.
In the first embodiment, the silicon coating layer 32 (see FIG. 3) coated with silicon is formed on the entire inner peripheral wall surface of the tapered cylindrical body 31.

  In the wire guide portion 3 according to the first embodiment, a curved portion 31 c that curves with an appropriate curvature with respect to the center line of the insertion tube portion 2 is formed. The curvature of the curve portion 31c can be set arbitrarily.

The means for connecting and fixing the insertion tube portion 2 to the wire guide portion 3 is not particularly limited, and any means can be adopted. In the first embodiment, the base end of the tapered tubular body 21 is connected and fixed to the distal end of the tapered tubular body 31 by welding 23.
In this case, as shown in FIG. 4, ring-shaped flanges 33, 34 project from the proximal end 21 b of the tapered tubular body 21 and the distal end 31 a of the tapered tubular body 31, and both flanges 33, 34 are bolt nuts 35. It is possible to adopt means such as fastening and fixing the two and connecting and fixing both 21 and 31. In short, both 21 and 31 may be connected and fixed.

  The straightening section 4 includes a plurality of straightening guide sections 41... 41 through which the electric wires can be inserted. In the first embodiment, as shown in FIG. 1A, an example in which ten guides 41 for line adjustment are provided is disclosed. In this case, the number of the guiding portions 41 can be arbitrarily increased or decreased. One electric wire is inserted into the guiding portion 41 and led out from the tip of the insertion tube portion 2. Thereby, a plurality of electric wires are straightened and sent out. That is, the electric wires are separated from each other in an orderly manner by the guiding portion and are sent out while maintaining the aligned state.

  The wire-straightening section 4 according to the first embodiment includes a plurality of wire wires that can be inserted into a disk-shaped plate-like body 42 having an outer peripheral portion fixed to the inner wall surface of the tapered tubular body 31 by any means ( In the figure, 10) insertion holes 41a... 41a are provided, and each of the guide portions 41 is configured of each of the insertion holes 41a.

  The material of the wire-straightening portion 4 is not particularly limited, and a silicon material, a hard plastic material, a metal material such as stainless steel, or the like can be employed. The means for fixing the wire-straightening section 4 in the wire guide section 3 is not particularly limited, and any other means such as adhesion, welding (in the case of a metal material) or the like can be employed.

  As shown in detail in FIG. 2, the straight line portion 4 of the first embodiment is formed with ring-shaped ridges 43... 43 that are rounded along the peripheral edge portion of each insertion hole 41 a. In the first embodiment, the ridges 43 are formed on both surfaces of the plate-like body 42. The ridge 43 is provided to reduce frictional resistance against the electric wire inserted into the insertion hole 41a. If this structure is employ | adopted, the frictional resistance value at the time of an electric wire passing the hole 41a can be reduced.

  The wire passing device 1 of the first embodiment is configured as described above. Next, an example of a wiring method for passing an electric wire through a conduit using the instrument 1 will be described.

As shown in FIG. 6, as in the conventional method, an operator 112 inserts the leading wire 111 into the opening end of the conduit 101 from the installation portion 104 side, and passes through the tube 101 while pushing the wire 111. The other installation part 105 side is connected.
On the other hand, in parallel with the above-described work, the worker 113 on the other installation part 105 side allows the required number of wires 108, 109, 110 to be passed through the conduit 101 from the proximal end opening side of the wire guide part 3. After one wire is inserted through the insertion hole 41a of the straightening portion 4 and led out from the tip 21a of the tapered tube body 21, each lead-out end portion of the electric wires 108 ... 110 is bonded to the end portion of the leading wire 111. Etc. (see FIG. 6). Next, after inserting the insertion tube portion 2 into the open end portion 101a of the conduit tube 101, the worker 112 pulls the leading wire 111 and passes it (see FIGS. 7 and 8).

  According to the above wiring method, each of the electric wires 108... 110 is straightened through the insertion hole 41a of the straightening section 4 and is inserted into the conduit 101, and is passed while maintaining the straightening state. Therefore, the resistance load applied to the electric wire during the wiring is reduced, and the wiring is made orderly and smoothly. Moreover, as shown in FIG. 9, since each electric wire passes through the bent portion in the conduit 101 while maintaining a straight line state, the frictional resistance is reduced and the bent portion passes.

  FIG. 10 is a side view showing another embodiment (Embodiment 2) of the wire passing device of the present invention. In this wire passing instrument, the same reference numerals are assigned to the same components as those already described in the first embodiment, and the description thereof is omitted.

  The wire passing device 1A of the second embodiment is characterized by the configuration of the wire guide portion 3A. That is, the tapered cylindrical body 31A of the wire guide portion 3A of the second embodiment is made of a flexible metal material that can be bent with an arbitrary curvature.

  The tapered cylindrical body 31A can be made of, for example, a stainless bellows-like metal material or a corrugated metal material. If the structure of Embodiment 2 is employ | adopted, the curvature of the bending curve of the taper cylindrical body of an electric wire guide part can be arbitrarily changed as shown by the virtual line of FIG. Other configurations are the same as those of the wire passing device 1 of the first embodiment.

  The wire passing device of the second embodiment is configured as described above, and is used in the same manner as the first embodiment. Thereby, there exists an effect similar to Embodiment 1. FIG.

  It should be noted that the above-described embodiments are disclosed as examples, and the present invention is not limited to these embodiments, and can be arbitrarily changed within the scope not departing from the technical idea described in the claims. It is possible.

1 shows an embodiment of a wire passing device of the present invention, in which FIG. 1 (a) is a perspective view and FIG. 1 (b) is a longitudinal sectional view. It is a longitudinal cross-sectional view which expands and shows the wire-straightening part employ | adopted as the instrument for electric wire connection same as the above. It is a longitudinal cross-sectional view which expands and shows the insertion tube part and the front end side part of an electric wire guide part of the instrument for electric wire connection same as the above. It is explanatory drawing which shows other embodiment of the connection means which connects an insertion tube part to an electric wire guide part. It is explanatory drawing shown in order to demonstrate an effect | action at the time of engaging an insertion tube part in the opening edge part of a conduit tube. It is explanatory drawing which shows the process of constructing the wiring work using the same electric wire wiring instrument same as the above. It is explanatory drawing which shows the other process which is similarly constructing a wiring work. In FIG. 7, it is explanatory drawing which expands and shows the part which entrapped the instrument for electric wire connection in the conduit. It is operation | movement explanatory drawing in the bending site | part in the conduit tube of the electric wire passed through. It is a side view which shows other embodiment of the instrument for wire wiring of this invention. It is explanatory drawing which shows the conventional wire passing method. It is a figure shown in order to demonstrate the problem by the conventional electric wire wiring method, The figure (a) points out the problem at the time of incoming, and the figure (b) points out the problem in the bending part in a conduit. It is explanatory drawing shown for this purpose.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire wiring instrument 2 Insertion pipe part 3 Electric wire guide part 4 Wire-shaping part 21 Tapered pipe body 31 Tapered cylindrical body 41 Wire-guiding guide part 41a Insertion hole 101 Electric wire pipe 111 Electric wire pulling lead wire

Claims (5)

A wire passing device used when passing a plurality of wires through a conduit piped in a building,
An insertion tube portion that can be removably inserted into the opening end portion of the conduit tube, a wire guide portion that is connected and fixed to the proximal end of the insertion tube portion, and an adjustment portion that is fixed and provided in the guide portion. Line part,
The insertion tube portion is composed of a tapered tube body that opens at both ends and has a taper that increases in diameter from the distal end side toward the proximal end side,
The wire guide portion is configured by a tapered cylindrical body that opens at both ends and has a taper that increases in diameter from the connection end side toward the base end side,
The wire-straightening portion is provided with a plurality of wire-shaping guiding portions through which the electric wire can be inserted,
Appliance for wire connection.   The straightening portion is configured by providing a plurality of insertion holes through which the electric wires can be inserted in a plate-like body provided with an outer peripheral portion fixed to an inner wall surface of the tapered cylindrical body, The wire passing device according to claim 1, wherein the portion is configured by the insertion holes.   The wire passing device according to claim 1 or 2, wherein the wire guide portion is formed with a curved portion that curves with an arbitrary curvature with respect to a center line of each insertion tube portion. An instrument for wire connection.   The wire passing device according to any one of claims 1 to 3, wherein the tapered cylindrical body of the wire guide portion is made of a flexible metal material that can be bent with an arbitrary curvature. A device for wire connection. A wire passing method for passing a plurality of wires through a wire pipe installed in a building using the wire passing device according to any one of claims 1 to 4,
The required number of wires to be connected to the conduit are inserted into the wire guide portion of the wire guide portion from the proximal end opening side of the wire guide portion, and are led out from the tip of the plug tube portion. Then, each lead-out end portion of the electric wire is connected to an end portion of the electric wire pulling leading wire by binding or the like, and then the insertion tube portion is engaged with the open end portion of the electric wire tube, and then the leading wire It is characterized by towing and passing through,
Wire connection method.

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