JP4991364B2 - Leading tool for insertion of cable tow rope in pipeline - Google Patents

Description

  According to the present invention, when a cable such as an optical fiber cable is newly added to a pipeline in which a cable has already been installed, a cable pulling rope that moves the new cable through the pipeline is provided from one end opening of the pipeline. The present invention relates to a cable pulling rope insertion guide for use in passing through to the other end opening.

  The upper surface has a curvature substantially the same as that of the pipe, and the lower surface extends so as to expand rearward on both sides of a plate-like body formed by a surface having the same curvature as the outer diameter of the cable installed in the pipe. There is a structure in which a guide spring is attached and configured to be used by being attached to the tip of a rod of an extrusion tool (for example, Patent Document 1).

  In general, a configuration in which a rod is pushed and moved from one end side of the conduit to the other end side so as to be interposed between the conduit and the cable installed in the conduit is pressed by the rod. Therefore, the directionality is not fixed, and therefore, there is a possibility that the tube cannot be moved forward due to being pinched between the pipe and the cable.

  For this reason, the above-mentioned conventional example adopts a form in which a guide spring is provided on a plate-like body so that the guide spring comes into contact with the pipe line or the already installed cable, and the plate-like body is inside the pipe line in the pipe line. It is designed to move smoothly as a leading tool by moving to a wide space.

JP-A-9-93740

  In the structure using the spring, since the spring moves in pressure contact with the pipe or cable in the pipe, the pipe or the like is damaged, and the pressure of the spring is used. Therefore, the inside of the pipe line where the cable is laid must have a space area corresponding to the size of the leading tool, and therefore, for example, a pipe suitable for the difference in the inner diameter of the pipe line must be prepared. It lacks general versatility.

  The present invention provides a leading tool that can be expected to smoothly move in a pipe by using a cable as a guide material instead of the above-described conventional example in which a gap between the pipe and an existing cable is used for moving a leading piece in the pipe. It was created for the purpose of providing

  A leading piece is constituted by a frame main body and a clamping piece loosely fitted one by one along the axis of the cable laid through the conduit and combined with each other with an assembly screw or the like, and the frame main body of the leading piece is defined as the axis of the cable It is set as the structure assembled | attached to the front-end | tip of the rigid ridge to push in in the said pipe line along.

  According to the present invention, since the leading piece adopts a configuration in which an existing cable is loosely fitted inside, the leading piece can be freely moved by being guided by the cable through the duct by being pushed by a rigid rod. Since the leading piece moves along the cable while being assembled to the cable, even if there is a relay point between the pipelines such as manholes, it is continuously moved between the pipelines. Can be practical.

  In addition, a nut material is pivotally attached to the main piece, and a male screw material is screwed onto the nut material to provide a leading piece at the tip of the rigid rod, so that the leading piece and the rigid rod can be easily assembled. It can be carried out.

  The drawings show an embodiment of a guide for inserting a cable pulling rope in a conduit according to the present invention, FIG. 1 is an explanatory view showing a use state, FIG. 2 is an enlarged sectional view of FIG. 1, and FIG. 4 is a cross-sectional view taken along the line aa in FIG. 1, FIG. 5 is a cross-sectional view taken along the line bb in FIG. 4, and FIG. 6 is an explanatory view showing the relationship with the cable.

  The leading device for inserting a cable pulling rope in a pipe according to the present invention is constructed by assembling a leading piece 2 to the distal end of a rigid rod 1, and the rigid rod 1 is made of steel wire, glass fiber, etc. The side is attached to the reel 3 and is wound around the reel 3 so that the reel 3 can be fed freely, and a male screw material 5 is provided at the tip for screwing and attaching the nut material 4 of the leading piece 2.

  The rigid rod 1 may be referred to as a wire rod or a propulsion wire, but the point is that the rigid rod 1 may be any one that moves by deforming and following a straight path or a curved path of the pipeline by pressing from outside the pipeline.

  The leading piece 2 is formed by assembling a separate piece main body 6 and a holding piece 7 to each other, and the piece main body 6 is inserted into the pipe p and laid in a thick, substantially trapezoidal base 6a. An arc-shaped piece 6b that fits one half along the axis of the cable c is provided continuously, and a pair of screw holes 8 and 8 are fitted in the base 6a along the axis of the cable c that fits the arc-shaped piece 6b. On the other hand, the nut member 4 is rotatably mounted on the rear end surface of the base 6a on the rigid rod 1 side.

  The nut material 4 is formed of a cap nut body, and the tip of the mounting screw 10 through the through hole 9 provided in the inner wall of the nut material 4 is screwed into the screw hole 11 provided in the base portion 6a, and can be freely rotated to the base portion 6a as described above. It is attached to.

  Then, the piece main body 6 is rotatably provided around the mounting screw 10 at the distal end of the rigid rod 1 by screwing the nut member 4 assembled to the base 6a with the male screw member 5 provided at the distal end of the rigid rod 1. It is a thing.

  The sandwiching piece 7 to be assembled on the piece main body 6 is constructed by connecting an arcuate piece piece 7b to a base portion 7a having a substantially thick trapezoidal outline in the same manner as the piece main piece 6, and being attached to the base portion 7a. The insertion holes 12 and 12 are provided at positions corresponding to the screw holes 8 and 8 provided in the base 6a on the main body 6 side.

  Then, the cable c is inserted through the pipe p and overlapped with the installed cable c outside the pipe, for example, in the manhole m so that the cable c portion is interposed between the piece main body 6 and the holding piece 7, and through the insertion hole 12. When the assembly screw 13 is screwed into the screw hole 8 and tightened, the leading piece 2 is assembled to the cable c, and the leading piece 2 is assembled by the screwed relationship between the nut member 4 and the male screw member 5. When the attached rigid rod 1 is pressed and the leading piece 2 is fed into the pipe p, the leading piece 2 is guided by the cable c and moves in the pipe p to reach the target location. Then, when the rigid rod 1 is pulled at the target location, the tip of the tow rope (not shown) connected to the end of the rigid rod 1 moves to the target location through the pipe p, and in the next stage work A new cable is laid in the pipeline by towing a certain tow rope.

Explanatory drawing which shows a use condition. The expanded sectional view of FIG. Rear view. FIG. 2 is a sectional view taken along line aa in FIG. 1. Bb sectional view taken on the line of FIG. Explanatory drawing which shows the relationship with a cable.

Explanation of symbols

1 Rigid rod 2 Leading piece 6 Frame main body 7 Clamping piece 10 Assembly screw c Cable p Pipe line

Claims (2)

  A leading piece is constituted by a frame main body and a clamping piece loosely fitted one by one along the axis of the cable laid through the conduit and combined with each other with an assembly screw or the like, and the frame main body of the leading piece is defined as the axis of the cable A cable pulling rope insertion guide that is assembled to the tip of a rigid rod that is pushed into the pipe along the line.   The guide for inserting a cable pulling rope in a conduit according to claim 1, wherein a nut member is rotatably attached to the frame main body, and a male screw member provided at the tip of a rigid rod is screwed to the nut member.

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