JPH03813Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Field of industrial application) This invention is mainly used at the point where buried cables are set up, when pulling down or pulling up cables from the end of cable protection pipes made of PVC pipes or iron pipes. This relates to a guide roller that pulls up the cable while protecting it from damage at the end.

(Conventional technology) Protective pipe for buried cables (outer diameter 130 to 150
mm) is made of PVC pipe, iron pipe, etc., and when pulling out the cable from the end, care must be taken not to damage the cable at the end.

Therefore, if the hole at the rising point is made of concrete, anchors, stays, etc. are installed around the hole, and the cable is bent using rollers, rollers, etc. supported by this and the cable is pulled up. However, he uses the hooks around him to pull himself up in the same way.

(Problem that the invention aims to solve) However, with this method, it is not possible to install anchors, stays, etc. in areas where the soil around the hole is exposed, which is called a ``point hole'', and the work ends up being difficult. A staff member had entered the hole and was directly holding down the cable.

(Means for solving the problem) Therefore, this idea was made in view of the actual situation, and the guide roller is directly attached to the end of the cable protection pipe, regardless of the condition of the surrounding holes. This is an attempt to solve the problem by supporting the following.

Specifically, the guide roller is pivotally attached to one end of the main body, the lower surface of the main body in contact with the surface of a pipe such as a cable protection pipe is formed into an approximately inverted V shape, and the guide roller is attached to one end of the main body. In order to easily determine the position from the end of the guide roller and prevent the pipe from moving in the axial direction, a locking part for catching the end of the pipe is provided on the bottom surface of the main body parallel to the axis of the guide roller. be. The main body is fixed to the pipe by passing a flexible tightening medium such as a chain or belt around the pipe, attaching it to the main body, and tensioning it with an appropriate fastening member. .

(Function) The guide roller according to this invention has the guide roller on the end side of the pipe, the locking part on the lower surface of the main body is hooked on the end of the pipe, and the lower surface of the approximately inverted V shape is in contact with the outer periphery of the pipe, All that is left is to pass the tightening medium around the tube and attach it to the main body, and tighten it with the tightening member to fix the main body to the tube.

When pulling down or pulling up the cable, the cable is pulled down along the guide rollers and then pulled up, and the cable is delivered into the pipe while contacting the guide rollers, and then raised in the same manner.

(Example) An example of this invention will be described below with reference to the drawings. 1, 2, and 3 are a plan view, a front view, and a side view of a guide roller according to an embodiment, respectively;
is the main body composed of an appropriate framework. Two arm portions 3a of a support arm 3 having a generally U-shaped planar shape with a guide roller 2 pivoted on one end thereof are brought into contact with the outside of both side portions 1a of the main body 1, and a mounting bracket 4 having a generally U-shaped longitudinal section is attached from the outside. The bolt end 4a is inserted into the hole 3b drilled in the arm portion 3a and the hole 1b bored in the main body 1, and is fixed by tightening with a nut 5 from the inside of the main body 1. In this embodiment, as is clear from FIG. 3, the support arm 3 is slightly inclined downward toward the guide roller 2. Bolt holes 6 and 7 for adjusting the angle of the support arm 3 are provided at the end 3c of the support arm 3 opposite to the guide roller 2. In the state shown in FIG. A locking bolt 9 with a tab 9a is screwed into the drilled bolt hole 8, but this can be changed to a combination of the bolt hole 7 of the support arm 3 and the bolt hole 10 drilled in the main body 1 to set the locking bolt 9. If screwed in the same way, the support arm 3 will be in a higher position than in the state shown in FIG. 3, and the angle can be changed.

Further, the lower surface of the main body 1 is formed in a substantially inverted V shape, and a step is provided on the guide roller 2 side parallel to the axis of the guide roller 2 to form a locking portion 1c.

FIG. 4 is a longitudinal cross-sectional view of the generally cylindrical fastener 11, showing the locking shaft 12 between its two projecting arms 1.
A slide member 1 having a bolt end 14a at one end is inserted into a hole 13b made in a locking tool 13 passed between 3a and 3a.
The bolt end 14a is screwed into a grip member 15 having a substantially cylindrical shape. Further, the outer diameter of the portion of this grip member 15 in contact with the locking tool 13 is the diameter of the hole 13.
The diameter of the slide member 14 is larger than the diameter of a, and the rotation of the grip member 15 causes the slide member 14 to move up and down in FIG. As shown in the figure, this locking tool locks the locking shaft 12 by placing it in the groove of the mounting bracket 4 (indicated by dotted lines in the figure) attached to the main body 1. Further, 16 is a chain serving as a tightening medium, one end of which is fixed to the slide member 14.

The method of using the guide roller according to the embodiment is as shown in FIG. Lock the locking tool 13 to the mounting bracket 4 on one side of the main body 1, pull the chain 16, pass it from below the cable protection pipe 17, and lock it to the mounting bracket 4 on the other side of the main body 1. , the chain 16 is tensioned by tightening it by turning the grip member 15 to a certain extent, and the main body 1 is fixed to the cable protection pipe 17. After the fixing is completed, for example, if the cable 18 is pulled up as shown in the figure, the cable 18 will be pulled up by the guide roller 2.
, the cable 18 is not damaged at the end of the cable protection pipe 17. It can also be pulled up smoothly.

(Effect of idea) The effects of this idea are listed below.

(1) The cable can be pulled down and pulled up smoothly at the end of the cable protection pipe without being damaged.

(2) Since it can be attached directly to the end of the cable protection pipe without being affected by the condition of the hole at the rising point, it can of course be applied even in "point-drilled" locations.

(3) The bottom surface of the main body is approximately inverted V-shaped, so it can be used with any pipe diameter.

(4) The main body can be attached and fixed to the pipe extremely easily and quickly.

(5) It is structurally simple.

(6) No other special tools or support members are required.

Furthermore, if configured as in the embodiment, the fastener 11 can be locked from either the left or right side of the main body 1, and can be locked from the side that is easier for the operator.
Further, by providing adjustment bolt holes 6, 7, 8, and 10 as appropriate, the support angle of the guide roller 2 can be changed, and the falling and rising angles of the cable 18 can be changed.

Of course, as mentioned above, the fastener 11 can be locked to the main body 1 from either the left or right side, so even if the cable protection pipe is a so-called multi-threaded pipe,
By appropriately selecting the locking position of the fastener 11, it is possible to install it easily and quickly.

[Brief explanation of drawings]

Each figure is a diagram of an embodiment, and FIG. 1 is a plan view, FIG. 2 is a front view, FIG. 3 is a side view, and FIG.
The figure is a partial vertical sectional view, and FIG. 5 is a front view of the main part showing the state of use. In the figure, 1 is a main body, 1c is a locking portion, 2 is a guide roller, 4 is a mounting bracket, 11 is a fastener, 16 is a chain, 17 is a cable protection pipe, and 18 is a cable.

Claims (1)

[Scope of utility model registration request] The lower surface of the main body, on which the guide roller is pivoted at one end with an appropriate member, is formed so that the longitudinal cross section is approximately inverted V-shape, and the lower surface of the main body, on the guide roller side, is provided with a periphery of the end of a pipe such as a cable protection pipe. A hooking part is provided parallel to the axial direction of the guide roller,
A guide roller characterized in that an appropriate tightening medium that can freely pass around the tube is attached to the main body, and the tightening medium can be tensioned and relaxed by an appropriate tightening member.