JPH0647196Y2 - Rope guide for buried pipe welding repair device - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a rope guide for a buried pipe welding repair device, and in particular, a rope guide for assisting a rope for towing the buried pipe welding repair device in a pipe such as a gas conduit. It is about.

[Prior Art] In general, most of gas conduits are buried in the ground, and it is difficult to directly grasp the state thereof, and efficient maintenance is not always easy. It is extremely effective from the viewpoint of planned preventive maintenance if the state of these gas pipes can be grasped as they are buried. Therefore, a gas pipe inspection robot that inspects the gas pipes without exposing them is very effective. Developed (Reference. Robot No. 59, P
72, Japan Industrial Robot Manufacturers Association, 1987-9-1).

Therefore, when a gas pipe inspection robot or the like detects a repaired portion of the buried pipe, the buried pipe must be dug up to carry out grinding repair and welding repair of the repaired portion.

[Problems to be Solved by the Invention] However, in the conventional buried pipe repair, since the buried pipe was dug and repaired, not only was the heavy equipment cost increased, but the buried pipe Since it is becoming difficult to efficiently excavate, inspect and repair due to traffic conditions, etc., the applicant separately repairs the repaired part from the inside of the pipe without digging up the buried pipe. We proposed the "Built-in pipe welding repair device" and the "Positioning device for buried-pipe welding repair device" that reliably positions the buried pipe welding repair device at the repair position. The buried pipe welding repair device is connected to a rope, one of the ropes is connected to a take-up drum, the other is connected to a take-up drum, etc.
The welding repair device in the buried pipe was guided and moved into the buried pipe so that it was reliably positioned at the repair position. However, regardless of the piping system of any equipment, it is unlikely that it will be composed of only straight pipes, and bend pipes such as bends, assembles, and miter bends are present everywhere. When the rope is towed by a rope, there is a problem that the rope causes a large friction due to contact with the inner wall of the pipe (in particular, the inner wall of the bent pipe), and the pulling force of the rope becomes large. Further, the rope comes into contact with the inner wall portion of the curved pipe, so that the rope may be worn and the inner wall portion thereof may be worn.

Therefore, the present invention has been made to solve the above-mentioned problems, and a rope guide for a buried pipe welding repair device capable of maintaining the rope and the curved pipe inner wall portion with a small rope pulling force when pulling the pipe repair device with a rope. The purpose is to provide.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a rope guide body mounted on a rope, wheels rotatably provided at both ends of the body, and the body formed on the body. The groove into which the rope is inserted, and the rope that is provided movably in the longitudinal direction on the outside of the main body and is urged toward the rope and that is inserted into the groove at the end on the rope side are installed. Rope fixing means consisting of a sleeve having a rope locking groove for preventing the rope from entering and pulling out from the groove of the rope, and preventing movement of the main body along the longitudinal direction of the rope provided on the front and rear ropes of the main body It is configured by including a frame for.

[Operation] With the above structure, the rope fixing means is provided, so that the rope guide can be fixed at a predetermined position of the rope. That is, move the sleeve against the biasing force until the groove of the main body is exposed, and after loading the rope in this groove,
Move the sleeve to the rope side and insert the rope into the rope locking groove. As a result, the rope is prevented from being pulled out from the groove and the sleeve is biased toward the rope to press the rope, so that the rope guide is fixed to the rope without coming off the rope. Therefore, the rope guide can be attached and detached only by moving the sleeve, so that the rope guide can be easily attached to a predetermined position of the rope. Further, by providing the ropes at the front and rear portions of the rope guide, the movement of the rope guide in the longitudinal direction of the rope is prevented. Further, when the buried pipe welding repair device is towed to a predetermined position in the pipe, the rope guides are arranged at appropriate intervals. The rotatably mounted wheels contact the inner wall of the pipe, and even if the curved pipe is present everywhere, the rope does not contact the inner wall of the curved pipe so much that it wears. For this reason, the rope is pulled while the wheels of the rope guide rotate, so that pulling the rope does not require a large force.

[Embodiment] A preferred embodiment of the rope guide according to the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, the rope guide body 1 is
Wheels 3 are formed in a cylindrical shape, and wheels 3 are rotatably provided at both ends of the main body 1 via bearings 2 such as pole bearings. The diameters of these wheels 3 are formed to be larger than the diameter of the main body 1 so that the ropes 4 fixed to the center of the main body 1 by these wheels 3 do not come into contact with the pipe inner wall 5. The outer side surface of the wheel 3 is formed in a truncated cone shape, and the side surface comes into contact with the pipe inner wall 5.

A rope fixing means 6 for fixing to the rope 4 is provided at the center of the main body 1. This rope fixing means 6 has a groove 7 formed in the central portion of the main body 1 and having a U-shaped cross section and opened upward, and a cylindrical shape provided on the outer periphery of the main body 1 so as to be slidable along its axial direction. It is mainly composed of a sleeve 8. A rope locking groove 9 having a U-shaped cross section and opened to the rope 4 side is formed at the end of the sleeve 8 on the rope 4 side.
The rope 4 loaded into the rope 4 is loaded to prevent the rope 4 from being pulled out from the groove 7, and the rope guide 10 is fixed to the rope 4. A coil spring 11 is provided between the sleeve 8 and the wheel 3 so as to cover the main body 1, and the sleeve 8 is biased toward the rope 4 by the biasing force of the coil spring 11.

Further, a pair of disc-shaped tops 12 are provided on the ropes 4 at the front and rear of the rope guide body 1 so as to sandwich the body 1.

Next, the operation of this embodiment will be described.

By providing the rope fixing means 6 in the central portion of the rope guide body 1, the sleeve 8 is slid toward the coil spring 11 against the biasing force of the coil spring 11 as shown in FIG. After exposing the groove 7 of the main body and loading the rope 4 into the groove 7, the sleeve 8 is moved to the rope 4 side to load the rope 4 into the rope locking groove 9. Then, since the sleeve 8 presses the rope 4 by the biasing force of the coil spring 11, the rope guide 10 is fixed to the rope 4 without coming off from the rope 4. Therefore, by providing the rope fixing means 6 in the central portion of the rope guide body 1, the rope guide 10 can be fixed at a predetermined position of the rope 4. In addition, as shown in FIG. 1, since a pair of tops 12 are provided so as to sandwich the rope guide body 1 between the ropes 4 at the front and rear of the rope guide 10, the rope guide 10 has a longitudinal length of the rope 4. Movement in the direction will be prevented. Therefore, the rope guide 10 can be easily attached and detached only by sliding the sleeve 8 along the axis of the rope guide body 1.

In addition, a buried pipe welding repair device is provided on the rope 4 on which the rope guides 10 are mounted at appropriate intervals (400 mm to 500 mm).
One of the ropes 4 is connected to a winding drum and the other is connected to a feeding drum or the like. Then, in winding and unwinding the winding drum and the unwinding drum, when the buried pipe welding repair device is guided and moved into the buried pipe by the pulling of the rope 4 to surely position it in the repair position, as shown in FIG. Rope guide
When 10 is mounted with an appropriate interval (400 mm to 500 mm), the wheels 3 at both ends of the rope guide 11 come into contact with the pipe inner wall 5, so that the rope 4 hardly comes into contact with the pipe inner wall 5. Therefore, when the rope 4 is wound by the winding drum or the like, the wheels 3 of the rope guide 10 come into contact with the inside of the pipe 5 and rotate, so that the pulling force of the rope 4 becomes small. Even if there are curved pipes everywhere, appropriate intervals (400 mm to 500 mm
mm), the rope guide 10 is attached to the rope 4, so that the rope 4 does not come into contact with the curved pipe inner wall portion 5 so as to wear, so that a large force is not required to pull the rope 4. Further, when the rope 4 does not come into contact with the curved pipe inner wall portion 5 to such an extent that it is worn away, the abrasion caused by friction between the rope 4 and the curved pipe inner wall portion 5 is almost eliminated, and the rope 4 and the pipe inner wall portion 5 are maintained. become.

[Effects of the Invention] Since the present invention is configured as described above, it has the following effects.

(1) Since the rope fixing means is provided, the rope guide can be easily attached to a predetermined position of the rope.

(2) When the welding repair device in the buried pipe is guided and moved into the buried pipe by pulling the rope, and is reliably positioned at the repair position,
Since the rope guides can be attached to the rope at appropriate intervals, the traction force of the rope can be reduced and the rope and the inner wall of the pipe can be maintained.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG.
FIG. 3 is a perspective view of the drawing, FIG. 3 is a perspective view of an essential part showing attachment / detachment of the rope guide of FIG. 2, and FIG. 4 is a sectional view showing a pulled state of a rope provided with the rope guide of the present invention. In the figure, 1 is a rope guide body, 3 is wheels, 4 is a rope,
6 is a rope fixing means and 12 is a top.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takashi Sakoma 4-1-2, Hiranocho, Chuo-ku, Osaka City, Osaka Prefecture Osaka Gas Co., Ltd. (72) Inventor, Isa Yamada 5-chome, Takada-cho, Mizuho-ku, Nagoya 2-8 (72) Inventor Toshio Kojima 3-1-15-1 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Ltd. Tokyo Second Factory (72) Inventor Akira Tanaka 3-1-15-1 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Ltd. Tokyo Second Factory (56) References

Claims (1)

[Scope of utility model registration request] 1. A rope guide body mounted on a rope,
Wheels rotatably provided at both ends of the main body, grooves formed in the main body into which the rope is inserted, and movably provided in the longitudinal direction on the outside of the main body and urged to the rope side, Also, a rope fixing means including a sleeve having a rope locking groove for preventing the rope from being pulled out from the groove by loading the rope inserted in the groove at the end on the rope side, and the front and rear of the main body. A rope guide for a buried pipe welding repair device, characterized in that the rope guide is provided on the rope of the section and is provided with a top for preventing movement of the main body along the longitudinal direction thereof.