JP5737697B1 - Lead wire conductor - Google Patents

Abstract

An object of the present invention is to provide a leading conductor for wire that can receive the pressure of air fed into a pipe and reliably advance in the pipe without disturbing the posture. A leading conductor for wiring according to the present invention has a front end portion, a central portion, and a rear end portion, a support shaft to which a wire is attached at the rear end portion, and an air receiver provided at the center portion of the support shaft. And a guide part provided at the tip of the support shaft. The air receiving portion is provided with a plurality of bone members radially provided around the support shaft, and a pressure receiving pressure that is applied to the plurality of bone members and receives air flowing in a direction from the rear end side toward the tip end side. And a first roller provided at the tips of the plurality of bone members, and the guide portion is provided at the tips of the support members and a plurality of support members provided radially around the support shaft. And a second roller. [Selection] Figure 1

Description

  The present invention relates to a lead conductor for wiring that is used when a wire such as an electric wire, cable, or nominal wire is passed through a pipe.

  When passing an electric wire or cable through the laid pipe, a wire is passed through the pipe in advance, and the wire is passed through the pipe by attaching the wire to the nominal wire and pulling it from the opposite side. However, when the call line is not passed in advance, it is necessary to pass the call line through the pipe using the leading conductor.

  Conventionally, as the leading conductor, for example, one using a conical cylinder type air pressure receiver as described in Patent Document 1 or one using a parachute type pressure receiving derivative as described in Patent Documents 2 to 6 is used. It is disclosed. In any of the leading conductors, the leading conductor attached with a wire such as a nominal wire is inserted into the pipe, and the leading conductor is advanced into the pipe by the pressure by feeding air into the pipe. Then, as the leading conductor advances, the wire is passed through the pipe.

JP2013-243893A Utility Model Registration No. 3047549 JP 2000-134750 A JP-A-9-308036 JP-A-6-133426 JP-A-6-121425

  However, when the leading conductor is advanced by air pressure using a leading conductor that is an air pressure receiving body or a parachute-type pressure receiving derivative, the attitude of the leading conductor is disturbed in the pipe due to the balance of air pressure and air flow, etc. Sufficient pressure cannot be obtained, and it may not be possible to proceed further from the middle. In particular, when it is necessary to insert a leading conductor and send air with a strong pressure, such as long piping or thick piping, the leading conductor tends to be disturbed and the wire cannot be passed to the target position. is there.

  An object of the present invention is to provide a leading conductor for wiring that can receive the pressure of the air fed into the pipe and can reliably travel in the pipe without disturbing the posture.

  In order to solve the above-mentioned problems, the leading conductor for wiring according to the present invention has a front end portion, a center portion, and a rear end portion, and is provided at a support shaft to which a wire rod is attached to the rear end portion, and a center portion of the support shaft. And an air receiving portion and a guide portion provided at the tip end portion of the support shaft. The air receiving portion is provided with a plurality of bone members radially provided around the support shaft, and a pressure receiving pressure that is applied to the plurality of bone members and receives air flowing in a direction from the rear end side toward the tip end side. And a first roller provided at the tips of the plurality of bone members, and the guide portion is provided at the tips of the support members and a plurality of support members provided radially around the support shaft. And a second roller.

  According to such a configuration, by inserting the leading conductor for wiring into the pipe and sending air from the insertion port, air pressure is reliably received by the air receiving section, and for the wiring without disturbing the posture by the guide section. The leading conductor is advanced into the pipe. Thereby, the wire rod attached to the rear end portion of the support shaft can be guided into the pipe.

  Since the air receiving portion is provided in the central portion of the support shaft, the air receiving portion can receive air pressure at a position close to the center of gravity of the leading conductor for wiring. Since the pressure receiving portion that receives air in the air receiving portion is covered with a plurality of bone members, the pressure receiving portion is not easily deformed even when receiving high air pressure. In addition, since the first roller provided at the tip of the plurality of bone members rolls while hitting the inner wall of the pipe, it is possible to smoothly and stably advance the leading conductor for wiring while maintaining the posture of the air receiving portion. it can.

  Moreover, since the guide part is provided in the front-end | tip part of a spindle, the position in piping at the front end side rather than the air receiving part of a spindle can be maintained with a guide part. Further, since the second roller provided at the tip of the plurality of support members of the guide portion rolls while hitting the inner wall of the pipe, the leading conductor for wiring is smoothly and stably advanced while maintaining the posture of the guide portion. Can do.

  In the leading conductor for wire of the present invention, the plurality of bone members and the plurality of support members may be provided so as to be openable and closable with the attachment position with the support shaft as a fulcrum. According to such a structure, the magnitude | size of an air receiving part and a guide part can be adjusted according to opening and closing of several bone members and several support members. Thereby, the size of the air receiving portion and the guide portion can be adjusted corresponding to various sizes of pipes, and the leading conductors for wiring can be guided into the pipes.

  In the lead conductor for wire according to the present invention, the size of the air receiving portion when the plurality of bone members are expanded may be substantially equal to the size of the guide portion when the plurality of support members are expanded. Good. According to such a structure, the size which expanded the air receiving part and the size which expanded the guide part can be arrange | equalized, and a leading conductor for wiring can be reliably guide | induced to piping which has a fixed internal diameter.

  The leading conductor for wire of the present invention may further include fixing means for fixing the plurality of bone members and the plurality of support members in an expanded state. According to such a configuration, the sizes of the air receiving portion and the guide portion can be fixed in accordance with the inner diameter of the pipe, and the air receiving portion and the guide portion can be stably advanced.

  The lead conductor for wiring of the present invention may further include interlocking means for interlocking the opening / closing operations of the plurality of bone members and the opening / closing operations of the plurality of support members. According to such a configuration, if the size of one of the plurality of bone members and the plurality of support members is adjusted, the size of the other is also adjusted in conjunction. Thereby, size adjustment of an air receiving part and a guide part can be performed easily.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to receive the pressure of the air sent in in piping, and to provide the front conductor for wiring which can advance the inside of piping reliably, without disturbing an attitude | position.

It is a perspective view which illustrates the tip conductor for wiring which concerns on this embodiment, (a) is a figure which shows the whole structure, (b) is an enlarged view which shows a roller part. It is sectional drawing which illustrates the opening-and-closing state of an air receiving part and a guide part, (a) is the state expanded greatly, (b) is a figure which shows the state expanded small. (A)-(e) is sectional drawing which illustrates the wiring method using the leading conductor for wiring which concerns on this embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same members are denoted by the same reference numerals, and the description of the members once described is omitted as appropriate.

[Configuration of conductor for wiring]
As shown in the perspective view of FIG. 1A, the lead conductor 1 for wiring according to the present embodiment is an instrument used when passing a wire W such as an electric wire, cable, or nominal wire through the inside of the pipe P. is there. By sending the air A into the pipe P, the wire leading conductor 1 is propelled in the pipe P by the pressure of the air A, and the wire W is sent. The main components of the lead wire conductor 1 according to this embodiment are a support shaft 10, an air receiving portion 20, and a guide portion 30.

  The support shaft 10 is a thin rod-shaped member having a front end portion, a center portion, and a rear end portion. The support shaft 10 may be a round bar or a square bar. For example, a ring 11 for attaching the wire W is provided at the rear end portion of the support shaft 10. As the material of the support shaft 10, for example, a resin such as carbon fiber reinforced plastic (CFRP), a metal such as aluminum, or a wood such as bamboo is used.

  The air receiving portion 20 is provided in the central portion of the support shaft 10. The air receiving portion 20 includes a plurality of bone members 21 provided radially around the support shaft 10, a pressure receiving portion 22 covered on the plurality of bone members 21, and the tips of the plurality of bone members 21. And a first roller R1.

  The bone member 21 is curved like an umbrella bone from the connection end to the support shaft 10 to the tip. That is, the connection end side of the bone member 21 extends radially with respect to the support shaft 10 and gradually curves toward the rear end side of the support shaft 10 toward the tip. As a material of the plurality of bone members 21, for example, resin such as CFRP, metal such as aluminum, and wood such as bamboo are used.

  The pressure receiving part 22 is attached so as to cover the plurality of bone members 21. The pressure receiving portion 22 is a portion that receives air A that flows in a direction from the rear end portion side to the front end portion side of the support shaft 10. By covering the pressure receiving part 22 on the plurality of bone members 21, the shape of the air receiving part 20 becomes an umbrella or a parachute. Thus, since the pressure receiving part 22 is covered with the multiple bone members 21, even if a high air pressure is applied to the pressure receiving part 22, it is difficult to be deformed. As a material of the pressure receiving unit 22, for example, vinyl or cloth is used.

  1st roller R1 provided in the front-end | tip of each bone member 21 is provided so that it may roll in the direction where the piping P is extended in contact with the inner wall of the piping P. As shown in FIG. As shown in FIG. 1B, for example, a caster 15 is used as the first roller R1. The caster 15 is provided at the tip of the bone member 21 with the wheel 15r facing outward. The caster 15 may be a fixed vehicle in which the direction of the wheel 15r is fixed, or may be a free wheel in which the direction of the wheel 15r is free. Since the first roller R1 rolls while hitting the inner wall of the pipe P, it can be smoothly and stably advanced while maintaining the posture of the air receiving portion 20 in the pipe P. In addition, if the caster 15 is a fixed vehicle, the rolling direction stability is enhanced, and if it is a free vehicle, the unevenness of the inner wall of the pipe P and the reaction force received from the inner wall can be flexibly followed.

  Since the air receiving portion 20 having such a configuration is provided at the center portion of the support shaft 10, it can receive air pressure at a position close to the center of gravity of the leading conductor 1 for wiring. For this reason, when the support shaft 10 advances through the pipe P by receiving air pressure at the air receiving portion 20, the propulsive force due to the air pressure is transmitted to the support shaft 10 in a well-balanced manner.

  The guide portion 30 is provided at the distal end portion of the support shaft 10. The guide portion 30 includes a plurality of support members 31 provided radially around the support shaft 10 and a second roller R2 provided at the tip of each of the plurality of support members 31.

  The support member 31 is provided so as to extend obliquely rearward from the distal end portion of the support shaft 10. As a material of the plurality of support members 31, for example, a resin such as CFRP, a metal such as aluminum, or a wood such as bamboo is used.

  The second roller R2 provided at the tip of each support member 31 is provided so as to be in contact with the inner wall of the pipe P and to roll in the direction in which the pipe P extends. Similarly to the first roller R1, the second roller R2 uses a caster 15 as shown in FIG. Since the second roller R <b> 2 rolls while hitting the inner wall of the pipe P, the second roller R <b> 2 can be smoothly and stably advanced while maintaining the attitude of the leading conductor 1 for wiring in the pipe P.

  Thus, since the guide part 30 is provided in the front-end | tip part of the spindle 10, the position of the spindle 10 of the front end side rather than the air receiving part 20 can be maintained near the center in the piping P. .

  In the lead conductor 1 for wiring according to the present embodiment having such a configuration, the central portion of the support shaft 10 is supported by the plurality of bone members 21 of the air receiving portion 20, and the tip portion of the support shaft 10 is guided. It is supported by a plurality of support members 31 of the portion 30. When the pressure of the air A sent into the pipe P is received by the air receiving portion 20 provided at the center portion of the support shaft 10, and the leading conductor 1 for propulsion passes through the piping P, the support shaft 10. The leading end portion is guided by the guide portion 30. As a result, when the support shaft 10 to which the wire W is attached is advanced into the pipe P, the through conductor 1 can be stably advanced. Further, the first roller R1 provided in the air receiving portion 20 and the second roller R2 provided in the guide portion 30 reduce the contact resistance with the inner wall of the pipe P, thereby smoothly moving the leading conductor 1 for wiring. I can go.

[Opening and closing of air receiving part and guide part]
In the wiring front conductor 1 according to the present embodiment, the size of the air receiving portion 20 and the guide portion 30 may be a fixed size according to the inner diameter of the pipe P, but the inner diameter of various pipes P You may be able to adjust to match. That is, the plurality of bone members 21 and the plurality of support members 31 may be provided so as to be openable and closable with the attachment position with the support shaft 10 as a fulcrum.

  For example, as shown in the cross-sectional view of FIG. 2A, for the pipe P having a large inner diameter, the plurality of bone members 21 and the plurality of support members 31 are opened widely. Thereby, the air receiving part 20 and the guide part 30 are expanded to the inside diameter of the piping P.

  On the other hand, as shown in the cross-sectional view of FIG. 2B, for the pipe P having a small inner diameter, the plurality of bone members 21 and the plurality of support members 31 are opened small. Thereby, the air receiving part 20 and the guide part 30 are match | combined with the internal diameter of the small piping P. FIG.

  Here, the size of the air receiving portion 20 when the plurality of bone members 21 are expanded may be substantially equal to the size of the guide portion 30 when the plurality of support members 31 are expanded. desirable. Usually, the inner diameter of the pipe P is constant. Therefore, the size when expanded in both the air receiving portion 20 and the guide portion 30 can be reliably fitted to the inner diameter of the pipe P.

  As an opening / closing mechanism for the plurality of bone members 21 and the plurality of support members 31, a slide ring, a link mechanism, or the like may be used to open and close, for example, on the same principle as an umbrella. Further, it is desirable that the plurality of bone members 21 and the plurality of support members 31 can be fixed at an arbitrary size when they are expanded.

  Furthermore, a mechanism for interlocking opening and closing of the plurality of bone members 21 and the plurality of support members 31 may be provided. For example, when one of the plurality of bone members 21 and the plurality of support members 31 is opened by the link mechanism, the other may be opened in conjunction with the opening. Thereby, the magnitude | size of the air receiving part 20 and the guide part 30 can be adjusted easily.

[Adjusting the length of the spindle]
Although not shown in the figure, the length of the support shaft 10 may be provided so as to be adjustable in the leading conductor 1 for a wire according to the present embodiment. For example, the support shaft 10 is divided into two in the length direction, and a length adjusting mechanism using a screw is provided between them. Thereby, the length of the spindle 10 can be adjusted as needed.

  For example, when the inner diameter of the pipe P is large, the support shaft 10 is lengthened, and when the inner diameter of the pipe P is small, the support shaft 10 is shortened. Thereby, the balance between the size of the air receiving portion 20 and the guide portion 30 and the length of the support shaft 10 is adjusted, and the stability of the leading conductor 1 is improved. In addition, when there is a bent portion in the middle of the pipe P, the length of the support shaft 10 is shortened when the curvature radius of the bend is small. Thereby, even if the middle of the piping P is bent, the leading conductor 1 for wiring can be smoothly propelled along this curve.

[Wiring method using the leading conductor for wiring]
Next, a method for laying a cable or the like using the lead wire conductor 1 according to the present embodiment will be described with reference to the cross-sectional views of FIGS.
First, as shown in FIG. 3A, the lead conductor 1 for wiring according to the present embodiment is inserted from one open end P1 of the pipe P. At this time, the sizes of the air receiving portion 20 and the guide portion 30 are matched with the inner diameter of the pipe P. A wire W is attached to the rear end portion of the support shaft 10.

  Next, as shown in FIG. 3B, the air A is sent into the pipe P from one open end P <b> 1 of the pipe P. Air A is sent in by a blower or the like (not shown). The pressure due to the air A sent in is received by the air receiving portion 20 expanded in the pipe P. Using the air pressure received by the air receiving portion 20 as a propulsive force, the leading conductor 1 for wiring advances through the pipe P.

  As shown in FIG. 3C, even if there is a bent portion in the middle of the pipe P, the leading conductor 1 for wiring advances smoothly. In the lead wire conductor 1 according to the present embodiment, the center portion of the support shaft 10 is supported by the plurality of bone members 21 of the air receiving portion 20, and the tip portion of the support shaft 10 is supported by the plurality of guide portions 30. It is supported by the member 31. Therefore, the attitude of the leading conductor 1 for passing through the pipe P is stable, and the bent part of the pipe P can be stably advanced.

  Further, the first conductor R1 provided at the tip of each bone member 21 and the second roller R2 provided at the tip of each support member 31 allow the leading conductor 1 for wiring to smoothly travel in the pipe P. . For this reason, even if there is a bent portion in the middle of the pipe P, it is possible to proceed with less resistance along the bend.

  By continuing to send air A from one open end P1 of the pipe P, the leading conductor 1 for wiring reaches the other open end P2 of the pipe P as shown in FIG. With the arrival of the leading conductor 1 for wire passing, the wire W is drawn into the pipe P.

  When the wire W is a cable or the like to be laid, laying of the cable or the like is completed by removing the wire W from the leading conductor 1 that has reached the other opening end P2. On the other hand, when the wire W is a nominal wire, the nominal wire is removed from the wire leading conductor 1 reaching the other opening end P2, and is laid on one end of the nominal wire (for example, the end attached to the support shaft 10). Attach cables. Then, by pulling the other end of the nominal line and pulling it out from the pipe P, a cable or the like attached to the nominal line is drawn into the pipe P. Thereby, the laying of the cable or the like in the pipe P is completed.

  Thus, the wire rod W can be smoothly and reliably drawn into the pipe P by using the air pressure by using the lead conductor 1 for wiring according to the present embodiment. In particular, since the attitude of the leading conductor 1 for wiring to be propelled in the pipe P can be stabilized and can be smoothly propelled by the first roller R1 and the second roller R2, it is a long pipe P, for example, several kilometers. However, the wire W can be reliably pulled in.

  As described above, according to the embodiment, it is possible to provide the leading conductor 1 for wiring that can receive the pressure of the air A sent into the pipe P and can surely advance in the pipe P without disturbing the posture. Is possible.

  Although the present embodiment has been described above, the present invention is not limited to these examples. For example, although the example using the caster 15 as the first roller R1 and the second roller R2 has been shown, a non-rotating sphere may be provided instead of the caster 15. Moreover, what added the addition, deletion, and design change of the component suitably with respect to the above-mentioned embodiment is also included in the scope of the present invention as long as it has the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Lead conductor 10 for wiring ... Spindle 11 ... Ring 20 ... Air receiving part 21 ... Bone member 22 ... Pressure receiving part 30 ... Guide part 31 ... Support member A ... Air P ... Pipe R1 ... 1st roller R2 ... 2nd Roller W ... Wire

Claims (3)

A support shaft having a front end portion, a central portion and a rear end portion, and a wire rod attached to the rear end portion;
An air receiving portion provided at the central portion of the support shaft;
A guide portion provided at the tip of the support shaft;
With
The air receiver is
A plurality of bone members provided radially about the support shaft;
A pressure receiving portion that covers the plurality of bone members and receives air flowing in a direction from the rear end side toward the tip end side;
A first roller provided at the tip of the plurality of bone members,
The guide portion is
A plurality of support members provided radially about the support shaft;
A second roller provided at the tip of the support member ,
The plurality of bone members and the plurality of support members are provided so as to be openable and closable with an attachment position with the support shaft as a fulcrum, and the plurality of bone members and the plurality of support members are expanded. in further comprising passing wire leading body, characterized in Rukoto a fixing means for fixing. Said plurality of magnitude of the air receiving portion at the time of expanding the bone member according to claim 1, wherein the same size and substantially the guide portion at the time of expanding the support member of the plurality of The leading conductor for the wire. The plurality of opening and closing operation of the bone member, said plurality of through wire leading body according to claim 1 or 2, further comprising an interlocking means for interlocking the opening and closing movement of the support member.