JP2580571Y2 - Cable insertion device into pipe - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for inserting a cable into a pipe, and more particularly, to insert a relatively rigid cable, such as a cable in a pipe end view method using a TV camera, from a branch pipe provided in the pipe into the pipe. The present invention relates to an apparatus for inserting a cable into a pipe, which is suitably used in such a case.

[0002]

2. Description of the Related Art Conventionally, as a method of inspecting a state of a fluid such as water flowing in a pipe, a cable having a TV camera attached to a distal end thereof is inserted into a pipe from a branch pipe portion for attaching a digestive plug. There is known an in-tube endoscope construction method in which the inside of a tube is inspected by using this TV camera.

[0003] In the cable insertion device in the pipe endoscope method, for example, a cable is sandwiched by a feed roller and the cable is sent out by rotating the feed roller, and inserted into the pipe from the branch pipe in a direction perpendicular to the axis of the pipe. The cable is passed through the insertion guide tube, and inserted into the tube from the tip of the insertion guide tube.

In this case, when a relatively rigid cable is inserted into the pipe, when the tip of the cable is fed into the pipe from the tip of the insertion guide tube in a direction perpendicular to the pipe, the direction of the tip of the cable is changed. Since it is difficult to change the length of the cable in the axial direction of the pipe, the tip of the cable hits the pipe wall and cannot be inserted smoothly.

To cope with this, there has been already proposed a cable insertion device into a pipe that can smoothly change the direction of the cable tip at the tip of the insertion guide tube in the axial direction of the pipe.

In this cable insertion device, as shown in FIG. 5, an insertion guide tube 32 having an opening 31 is provided at a tip thereof with a posture substantially along the axial center direction of the insertion guide tube 32 and an inclined posture projecting obliquely forward. Guide plate 33 that can swing between
And manually rotating an operation shaft 34 disposed through the insertion guide cylinder 32 to swing the guide plate 33 to a position indicated by a virtual line to guide the distal end of the cable 35. The operation shaft 34 is rotated by a screw shaft 36 rotatably supported, a nut body 37 screwed up and down by screwing the screw shaft 36, and a connection shaft 3 attached to the nut body 37.
8 and the moving bracket 39 and the moving bracket 3
9 and a link 40 connecting the back surface of the guide plate 33 to the guide plate 33, whereby the guide plate 33 is swung. Reference numeral 41 denotes a second guide plate whose lower end is in contact with the guide plate 33 and swings with the guide plate 33 from a solid line position to a virtual line position.

[0007]

However, in the above-mentioned conventional structure, the operability is poor because the operating position of the operating shaft 34 is the uppermost part of the cable insertion device, and the operating shaft 34 is not operated.
Since the guide plate 33 is swung by rotating the guide plate 33, it takes time to swing the guide plate 33, and the configuration is complicated.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and has a simple structure and can easily change the direction of the tip of the cable in the axial direction of the tube easily and without trouble. The purpose is to provide.

[0009]

According to the present invention, there is provided a cable for inserting an insertion guide tube into a tube from a branch tube provided in the tube, passing the cable through the insertion guide tube, and inserting the cable into the tube. In the insertion device, a distal end guide portion whose one side is cut and opened is formed at a portion of the insertion guide tube to be inserted into the tube, and the distal end guide portion is divided into a plurality of portions in the longitudinal direction, and the divided edges are joined together. A swinging means is connected so that the divided body on the distal end side can be bent toward the opening, and biasing means for biasing the divided body to a position along the axis of the insertion guide cylinder is provided. The tip-side split body is bent toward the opening against the urging means when the insertion guide tube is inserted into the tube and abutted against the tube bottom to receive a reaction force from the tube bottom. It is configured so that

[0010]

According to such a configuration, in the natural state where no external force acts, the distal end guide portion of the insertion guide cylinder is in a straight posture along its axis by the urging means, that is, its own weight or a spring. Insert the guide tube into the tube. When the distal end of the insertion guide cylinder comes into contact with the bottom of the tube and a pushing reaction force acts, the distal end divided portion of the distal end guide portion is bent toward the opening side against the urging means, and the subsequent divided body is also bent toward the opening side. I do. Then, when the cable is sent out into the insertion guide tube, the tip of the cable is guided by each bent segment, and its direction is changed to the axial direction of the pipe, whereby the cable is smoothly inserted into the pipe. You.

When the insertion guide tube is pulled out after the cable is pulled out, the distal end thereof separates from the tube bottom and no longer receives a reaction force, so that the divided body of the distal guide portion is returned to its original state by the urging means. It returns to the position along the axis of the insertion guide tube, and is taken out of the tube without any trouble.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the in-pipe endoscopy method will be described with reference to FIG. Here, reference numeral 1 denotes a pipeline such as tap water buried underground, and a pit 2 for an underground digestion plug is formed at an appropriate distance above the pipeline. A branch pipe 3 is led into the pit 2 from a pipeline 1, and an auxiliary valve 4 is provided at an upper end of the branch pipe 3.
It is configured to attach a digestive plug (not shown) via the. When performing the in-tube endoscope method, the sub-valve 4 is closed, the digestion plug is removed, and the cable insertion device 5 is connected to the sub-valve 4 as shown in the figure.

The cable insertion device 5 includes a cable drum 7 around which a cable 6 to be inserted into the pipeline 1 is wound, and a split sealing device 8 for passing the cable 6 while maintaining the inside of the pipeline 1 in a sealed state. , A pressure-resistant hose 9 for passing the cable 6, and a cable feeder 10 configured to feed the cable 6 into the pipe by rotating the roller while holding the cable 6 between the pair of rollers. An emergency shut-off valve 11 interposed between the lower end of the cable feeding device 10 and the auxiliary valve 4, an insertion outer cylinder 12, and an insertion guide cylinder 13 inserted into the insertion outer cylinder 12. The configuration is as follows. A plurality of large-diameter block-like bodies 6a such as a TV camera, its lighting, and a control device are attached to the cable 6 at appropriate intervals from the end thereof.

Next, the structure of the lower end of the insertion guide cylinder 13 will be described with reference to FIGS. The distal end guide portion 14 of the insertion guide tube 13 has substantially a half of its peripheral wall cut away to form an opening 15 that is largely open on one side. The tip guide section 14 is divided into upper and lower parts. Upper split 1
6 is formed integrally with the insertion guide cylinder 13. The lower divided body 17 is swingably connected to a lower end of the upper divided body 16 by a connecting pin 18 so as to be bent toward the opening 15 side. At the lower end of the lower divided body 17,
An inclined surface 19 that is inclined obliquely downward toward the opening 15 is provided. A roller 20 for rolling is rotatably attached to a tip of the inclined surface 19, that is, a lower end of the divided body 17.

A V-shaped notch 21 is formed at the connecting portion between the upper and lower divided bodies 16 and 17 so that the lower divided body 17 can be bent toward the opening 15. A leaf spring 22 that elastically urges the lower divided body 17 toward a position along the axis of the insertion guide cylinder 13 is provided on the back of the connection between the upper and lower divided bodies 16 and 17. The upper and lower ends of the leaf spring 22 are fixed to the back surfaces of the divided bodies 16 and 17, respectively.

In such a configuration, when performing an endoscopic inspection of the inside of the conduit 1, the insertion outer cylinder 12 is connected to the sub-valve 4 from which the digestion plug (not shown) has been removed, as shown in FIG. The cable insertion device 5 is installed in the device. Next, the sub-valve 4 is opened, the insertion guide cylinder 13 in the insertion outer cylinder 12 is lowered, and its tip is inserted into the pipe 1 through the sub-valve 4 and the branch pipe 3. At this time, the divided body 17 below the tip guide portion 14
Is positioned along the axis of the insertion guide tube 13, so that insertion can be performed without any trouble.

The lower divided body 1 in the tip guide portion 14
When the lower end of the pipe 7 contacts the bottom of the pipe 1, the reaction force causes the divided body 17 to have an opening 15 around the connecting pin 18.
A sideward moment acts. Therefore, as shown by the phantom line in FIG.
7 swings toward the opening 15 side to assume a bent posture, and the divided body 17 forms a guide surface which is bent in the horizontal direction from the upper side to the lower side.

In this state, the cable 6 is inserted into the insertion guide cylinder 13 through the insertion outer cylinder 12 by the cable feeding device 10.
Send in. The tip of the cable 6 is the tip guide portion 14
In this case, since the guide surface bent as described above is formed, the distal end of the cable 6 smoothly changes its direction in the axial direction of the pipeline 1. Then, the cable 6 is reliably sent out into the pipeline 1, and the inner surface of the pipeline 1 is inspected by a TV camera or the like provided on the block-shaped body 6a.

When the inspection is completed, the cable feeding device 10 is operated in the reverse direction, and the cable 6 is pulled up. Then, the insertion guide cylinder 13 is connected to the branch pipe 3 and the sub-valve 4.
Extract from At this time, as the insertion guide tube 13 is pulled out and separated from the bottom of the pipeline 1, the lower divided body 17 is returned to the original position by the leaf spring 22 and swings, and is withdrawn without any trouble.

Finally, the inspection operation is completed by closing the sub-valve 4, taking out the inserted outer cylinder 12 and attaching the digestive plug. In the above-described embodiment, the lower split body 17 is held by the leaf spring 22 in a posture along the axis of the insertion guide tube 13. However, other urging means and the split body 1 are used.
It is also possible to adopt a configuration in which this posture is achieved only by the weight of the self-weight 7.

Further, in the above embodiment, the distal end guide 1
4 is divided into upper and lower divided bodies 16 and 17, but as shown in FIG. 4 (a), divided bodies 26, 27 and 2 are divided.
The same effect can be obtained by dividing into three into eight, by dividing into four divided bodies 36, 37, 38, and 39 as shown in FIG. In addition, when the number of divisions is increased, a guide surface that is bent so that the inclination angle becomes gradually gentle from the vertical posture toward the horizontal direction is formed, and a smoother guide function can be obtained.

[0022]

As described above, according to the present invention, at the portion of the insertion guide tube to be inserted into the pipe, a distal end guide portion having one side cut and opened is formed, and this distal end guide portion is formed in the longitudinal direction. Divided into a plurality, and the divided edges are swingably connected so that the divided body on the distal end side can bend toward the opening, and the divided body is oriented along the axis of the insertion guide cylinder. A biasing means for biasing the divided body on the distal end side into contact with the bottom of the tube by inserting the insertion guide tube into the tube and receiving a reaction force from the bottom of the tube. Therefore, the conventional operation for swinging the guide plate is not required, and the insertion and removal operation of the insertion guide tube can be easily performed. Further, since the structure is simple, the manufacturing cost is low.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a distal end guide portion of an insertion guide tube in a cable insertion device according to an embodiment of the present invention.

FIG. 2 is a left side view of the portion shown in FIG.

FIG. 3 is an overall view of a cable insertion device according to the present invention.

FIG. 4 is a view illustrating a distal end guide portion according to another embodiment of the present invention.

FIG. 5 is a sectional view of a conventional cable insertion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipeline 5 Cable insertion device 6 Cable 13 Insertion guide cylinder 14 Tip guide part 15 Opening 16 Upper divided body 17 Lower divided body 18 Connecting pin 19 Inclined surface

Continuing on the front page (72) Inventor Yoshimi Sakurai 2-26-2 Ohama-cho, Amagasaki-shi, Hyogo Prefecture Inside the Kubota Mukogawa Works (72) Inventor Hirobo Ohama 2-26-2, Ohama-cho, Amagasaki-shi, Hyogo Kubota Mukogawa Corporation (56) References JP-A-3-277896 (JP, A) JP-A-5-79190 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16L 55/00 H02G 1/08

Claims (1)

(57) [Scope of request for utility model registration] 1. A cable insertion device for inserting an insertion guide cylinder into a pipe from a branch pipe provided on the pipe, and inserting a cable into the pipe through the insertion guide cylinder.
At the portion of the insertion guide tube to be inserted into the tube, a tip guide portion having one side portion cut and opened is formed, and this tip guide portion is divided into a plurality of pieces in the longitudinal direction. Of the insertion guide cylinder are connected so as to be swingable so that the divided body can be bent to the side of the opening .
An urging means for urging the posture along the axis;
The split body on the side is inserted by inserting the insertion guide tube into the pipe.
When abutting against the pipe bottom and receiving a reaction force from this pipe bottom,
It is configured to bend toward the opening against the urging means.
A device for inserting a cable into a pipe, characterized in that it is formed .