JPH04101208U - Cable insertion device into pipe - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a device for inserting a cable into a pipe, which can easily change the direction of the tip of the cable smoothly in the axial direction of the pipe without much effort. [Structure] In a cable insertion device that inserts an insertion guide tube 13 into the conduit 1 from a branch pipe 3 provided in the conduit 1, passes the cable 6 through the insertion guide tube 13, and inserts the cable 6 into the conduit 1. , at the tip of the insertion guide tube 13,
The guide plate 16 is provided with a guide plate 16 that swings between a posture in which the lower end slightly inclines diagonally forward and protrudes downward with respect to the axis x of the insertion guide tube 13 and an inclined posture in which the lower end protrudes forward. .

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a device for inserting cables into pipes, and in particular, a system for viewing the inside of pipes using a TV camera. A branch pipe in which relatively rigid cables, such as cables used in construction methods, are attached to the pipe. Regarding a device for inserting a cable into a pipe, which is preferably used when inserting a cable into a pipe from It is something.

0002

[Conventional technology]

Traditionally, this method has been used to inspect the condition of a fluid such as water while flowing inside a pipe. Insert the cable with the TV camera attached to the tip from the branch pipe section for installing the fire hydrant into the pipe. There is a well-known intra-pipe inspection method in which the inside of the pipe is inspected using a TV camera. Ru.

0003 The cable insertion device used in this pipe internal construction method uses, for example, feed rollers to The cable is held between the cables and the cable is fed out by the rotational drive of this feed roller. Pass the cable from the branch pipe into the pipe and into the insertion guide cylinder inserted perpendicularly to this pipe. It is configured to be inserted into the tube from the tip of this insertion guide tube.

0004 In this case, when inserting a relatively rigid cable into the pipe, When the tip is fed into the tube from the tip of the insertion guide tube in the direction perpendicular to the tube, this Because it is difficult to change the direction of the cable end in the axial direction of the pipe, The end hit the tube wall and could not be inserted smoothly.

[0005] To deal with this, the direction of the cable tip can be adjusted at the tip of the insertion guide tube. A device for inserting a cable into a pipe that can be smoothly changed in the axial direction has already been proposed. It is.

[0006] As shown in FIG. 4, this cable insertion device includes an insertion guide cylinder having an opening 31. At the tip of the insertion guide cylinder 32, the position is approximately along the axial direction of the insertion guide cylinder 32 and diagonally forward. A guide plate 33 that can swing between a protruding and inclined position is provided, and the insertion guide tube 32 is The guide plate 33 can be temporarily moved by manually rotating the operating shaft 34 that is disposed through it. The tip of the cable 35 is guided by swinging it to the position shown by the phantom line. operation The rotation of the shaft 34 is achieved by a rotatably supported screw shaft 36 and a screw shaft 36 that is screwed into the screw shaft 36. The nut body 37 that moves up and down, the connecting shaft 38 attached to the nut body 37, and the movement The bracket 39 is connected to the rear surface of the movable bracket 39 and the guide plate 33. The vibration is transmitted to the guide plate 33 by the link 40, which causes the guide plate 33 to oscillate. It is designed to be moved. Note that the lower end of 41 is in contact with the guide plate 33 and the guide This is a second guide plate that swings along with the guide plate 33 from the solid line position to the imaginary line position.

[0007]

[Problem that the idea aims to solve]

However, in the conventional configuration described above, the operating position of the operating shaft 34 is the cable insertion device. Since it is located at the top, it has poor operability, and it is difficult to guide while rotating the operating shaft 34. Since the plate 33 and the like are to be swung, it may take time to oscillate the guide plate 33. .

[0008] This invention solves the above problem and allows you to easily connect cables to the cable end without any effort. Cable insertion device into a pipe that can smoothly change the direction of the end in the direction of the pipe axis The purpose is to provide the following.

[0009]

[Means to solve the problem]

In order to solve the above problem, the present invention has been developed to insert a guide into the pipe from a branch pipe installed in the pipe. Insert the guide tube, pass the cable through this insertion guide tube, and insert the cable into the tube. In the cable insertion device, the shaft of the insertion guide tube is attached to the tip of the insertion guide tube. A posture in which the lower end is slightly tilted forward and protrudes downward with respect to the heart, and the lower end is forward. A guide plate is provided that swings between an inclined position and a protruding position.

0010

[Effect] In the above configuration, the guide is activated by the biasing force of the spring or the weight of the guide plate. When no external force is applied to the plate, the guide plate is at the lower end with respect to the axis of the insertion guide tube. Hold it so that it is slightly tilted diagonally forward and protrudes downward. this When the tip of the insertion guide tube is inserted into the tube in this condition, the lower end of the guide plate will touch the bottom of the tube. The guide plate is in an inclined position where it protrudes forward in response to the horizontal component of the reaction force from the bottom of the tube. becomes. Therefore, the cable was fed into the insertion guide tube, and the tip of this cable was When it reaches the guide plate, its direction changes along the inclined guide plate toward the axis of the tube. and the cable is inserted smoothly into the pipe. Also, after removing the cable, When the insertion guide tube is pulled out, the lower end of the guide plate separates from the bottom of the tube and touches the bottom of the tube. Since it no longer receives the reaction force from the The lower end returns to the position where it is slightly tilted diagonally forward and protrudes downward, and the guide plate is inserted. It is accommodated within the cross section of the guide tube and can be taken out from the tube without any problems.

[0011]

【Example】

Hereinafter, one embodiment of the present invention will be described based on the drawings. First, the pipe endoscopic construction method will be explained with reference to FIG. Here 1 is buried underground It is a conduit for water supply, etc., and there are pits for underground fire hydrants at appropriate distances above it. 2 is formed. A branch pipe 3 is led from the pipe line 1 into the pit 2, A fire hydrant (not shown) is attached to the upper end of this branch pipe 3 via a sub-valve 4. has been done. When implementing the pipe internal inspection method, close sub-valve 4 and remove the fire hydrant. Then, a cable insertion device 5 is connected to this sub-valve 4 as shown in the figure.

0012 The cable insertion device 5 is a cable wrapped around a cable 6 to be inserted into the conduit 1. a cable drum 7 and a second tube through which the cable 6 passes while maintaining the internal seal of the conduit 1. A split sealing device 8, a pressure hose 9 for passing the cable 6, and the cable 6 This case can be removed by rotating the rollers while holding the case between the rollers. a cable feeding device 10 configured to feed the cable 6 into the pipe; An emergency shutoff valve 11 interposed between the lower end of the cable feeding device 10 and the sub-valve 4; , an insertion outer cylinder 12 and an insertion guide cylinder 13 inserted into the insertion outer cylinder 12. It is said that it has a configuration with A guide device 14 is provided at the lower end of the insertion guide tube 13. and is configured to bend the cable 6 at right angles and send it out in the axial direction of the conduit 1. It is. TV cameras and their lights are connected to the cable 6 at appropriate intervals from its tip. , a plurality of large-diameter block-like bodies 6a such as a control device are attached.

[0013] Next, the configuration of the guide device 14 provided at the lower end of the insertion guide tube 13 is shown in FIG. I will explain further. At the lower end of the insertion guide tube 13, approximately half of its peripheral wall is cut out. An opening 15 which is wide open laterally is formed. The insert facing this opening 15 The upper end of the guide plate 16 swings on a support shaft 17 at the lower end back side of the input guide cylinder 13. It can be installed freely. A guide plate 16 is urged in the direction a on this support shaft 17. A spring 18 is provided externally, and a stopper 19 is provided below the support shaft 17. As a result, the guide plate 16 moves as shown in FIG. 1 when no external force is applied. , the lower end is slightly inclined diagonally forward with respect to the axis x of the insertion guide cylinder 13, and the lower end is It is held in a protruding position. A sliding roller 20 is provided at the lower end of the guide plate 16. is rotatably attached.

[0014] In addition, the guide plate 16 in the vicinity of the opening 15 of the insertion guide tube 13 is positioned diagonally upward. The upper part of the second guide plate 21 is swingably attached to the support shaft 22 at the position. This support shaft 22 is also equipped with a spring 23 that biases the second guide plate 21 in the b direction. At the same time, a stopper 24 is provided below the support shaft 22, which allows the second guide shaft 22 to The idle plate 21 is approximately aligned with the axis x of the insertion guide cylinder 13 when no external force is applied. It is held in a straight position. Note that the guide plate 16 and the second guide plate 21 are Each of them is formed to a size that fits within the cross section of the insertion guide tube 13.

[0015] In such a configuration, when internally inspecting the inside of pipeline 1, use a fire hydrant (not shown). Connect the insertion outer cylinder 12 to the sub-valve 4 from which the Install the input device 5. Next, open the sub valve 4 and insert the insertion guide tube 1 inside the insertion outer tube 12. 3 and insert its tip into the pipe line 1 through the sub valve 4 and the branch pipe 3. . At this time, the guide plate 16 and the second guide plate 21 are connected to the insertion guide cylinder 13, respectively. Since it is contained within the cross-section of , it can be inserted without any problem.

[0016] When the insertion guide tube 13 is inserted to the vicinity of the bottom of the conduit 1, the insertion guide tube 13 The roller 20 at the lower end of the guide plate 16 attached to the tip comes into contact with the bottom surface 1a of the conduit 1 The horizontal component of the reaction force causes the guide plate 16 to slide forward as shown in FIG. Then, it swings in the direction c against the force of the spring 18 and assumes an inclined position with its lower end protruding forward. In addition, along with this, the lower end of the second guide plate 21 also comes into contact with the guide plate 16 and moves forward. (direction d), and is lowered from above by the second guide plate 21 and the guide plate 16. The guide surface is bent so that the angle of inclination with the horizontal direction gradually becomes gentler toward the direction. It is formed.

[0017] In this state, the cable 6 is inserted through the outer tube 12 using the cable feeding device 10. Insert it into the insertion guide cylinder 13. The tip of the cable 6 is at the position of the guide device 14. When it comes with a curved guide surface as described above, the tip of the cable 6 is The end smoothly changes direction toward the axis of conduit 1 to ensure that cable 6 is fed into conduit 1. The inner surface of the conduit 1 is inspected using a TV camera etc. installed on the block-shaped body 6a. will be held.

[0018] When the inspection is completed, the cable feeding device 10 is operated in the opposite direction to remove the cable. 6 is raised. After that, the insertion guide cylinder 13 is removed from the branch pipe 3 and the sub valve 4. bring it out. At this time, the guide plate 16 is attached to the bottom of the conduit 1 when the insertion guide tube 13 is pulled out. As it moves away from the surface 1a, it swings in the direction a by the spring 18, and along with this, the second The guide plate 21 also swings in the b direction by the spring 23. And these guide plates 1 6 and the second guide plate 21, the roller 20 at the tip is separated from the bottom surface 1a of the conduit 1. At this point, it returns to the position shown in FIG. 1 and can be extracted without any problem.

[0019] Finally, close the sub-valve 4, take out the insertion cylinder 12, and install the fire hydrant. The inspection work is completed. In the above embodiment, the guide plate 16 and the springs 18, 23, etc. Although the second guide plate 21 was configured to be held in the posture shown in FIG. It may be configured so that this posture is achieved only by the weight of the guide plate 16 etc. without .

[0020]

[Effect of the idea]

As described above, according to the present invention, the insertion guide tube is provided at the distal end of the insertion guide tube. The lower end is slightly inclined diagonally forward and protrudes downward with respect to the axis of the lower end. A guide plate is provided that can swing between the forward protruding inclined position and the insertion guide cylinder. The guide is installed using the contact and separation movement of the guide plate with the bottom surface of the pipe based on the movement of insertion into and removal from the pipe. Since the guide plate is configured to swing, the conventional method of swinging the guide plate is no longer required. This eliminates the need for work and allows you to easily insert and remove the insertion guide tube without spending much time. Ru. Furthermore, since the structure is simple, the manufacturing cost is also low.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of a guide device of a cable insertion device into a pipe according to an embodiment of the present invention.

FIG. 2 is an overall schematic diagram of the cable insertion device.

FIG. 3 is a front sectional view illustrating the operation of the guide device.

FIG. 4 is a cross-sectional view of a conventional cable insertion device.

[Explanation of symbols]

1 Pipeline 5 Cable insertion device 6 Cable 13 Insertion guide tube 14 Guide device 16 Guide plate 18, 23 spring 19, 24 Stopper 21 Second guide plate

Claims (1)

[Scope of utility model registration request] 1. A cable insertion device that inserts an insertion guide tube into the tube from a branch tube provided in the tube, passes the cable through the insertion guide tube, and inserts the cable into the tube, comprising:
At the tip of the insertion guide tube, there is a guide that swings between a posture in which the lower end is slightly inclined diagonally forward and protrudes downward with respect to the axis of the insertion guide tube, and an inclined posture in which the lower end protrudes forward. A cable insertion device into a pipe, characterized by being provided with a plate.