JPH078520Y2 - Fiberscope withdrawal stop mechanism in fiberscope winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a fiberscope withdrawal stop for automatically stopping the withdrawal of a fiberscope wound on a winding drum of a fiberscope winding device. It is related to the mechanism.

(Prior Art) A fiberscope is used, for example, to insert it into a pipeline such as a gas pipe or a water pipe buried underground, project the inside thereof, and observe the inside of the pipeline on the ground. .

This fiberscope B has conventionally been wound around a winding drum A of a fiberscope winding device as shown in FIG. 6 as shown in FIG. 6A, and the winding drum A near the observation site. It is pulled out from and sent into the pipeline.

Since the fiberscope B has a very high bending rigidity,
Whether it is wound on the winding drum A or pulled out, it always tries to be straight, and in the direction of arrow x in FIG. 6 (b) (outside).
And is wound around the drum A as shown in FIG. At this time, as shown in FIG. 6, the fiberscope B is guided by one guide roller C attached in the spreading direction (upper) of the scope B.

(Problems to be solved by the invention) Since the conventional fiberscope B does not have a stopper for stopping the withdrawal from the winding drum A, when the fiberscope B is withdrawn from the winding drum A and sent to a gas pipe or the like, the same drum A is used. Unless the rotation is stopped, it may be pulled out to the end, and even the extra length of the fiberscope B wound on the drum A may be pulled out.

However, since the fiberscope B has a weak tensile strength,
When the fiber is pulled out to the extra length, the end of the fiberscope B wound on the winding drum A is stretched out, and the large rotational force of the drum A is added to the end of the same scope B to make the scope B stronger. There was a problem that the scope B was pulled and the scope B was broken by the impact at that time.

(Object of the Invention) The object of the present invention is to automatically stop the fiberscope when the fiberscope is pulled out from the winding drum by a predetermined length, and prevent the end of the fiberscope from breaking. It is to provide a drawer stop mechanism.

(Means for Solving the Problems) The fiberscope drawing-out stopping mechanism in the fiberscope winding device of the present invention is the fiberscope winding device provided with the winding drum A for winding the fiberscope B as shown in FIG. The two guide rollers 1 are opposed to each other and a passage 2 through which the fiberscope B drawn from the winding drum A passes is formed between the two guide rollers 1.
The draw-out restrictor is formed as shown in the drawing, and has an outer shape larger than the outer diameter of the fiberscope B and larger than the width of the passage 2 along the circumferential direction on the outer circumference of the fiberscope B on the winding start end side. 3 (FIGS. 3 to 5) is attached so as to be pressed against the guide roller 1 when the fiberscope B is pulled out, as shown in FIG. 3 (b).

(Operation) In the fiberscope winding device of the present invention, the withdrawal restrictor 3 as shown in FIGS.
Since it is attached to the outer periphery of the winding start end portion of the same in the circumferential direction thereof, the fiberscope B is wound as shown in FIG. 1 through the passage 2 between the two guide rollers 1 as shown in FIG. When the fiberscope B is pulled out from the drum A and drawn into a conduit such as a gas pipe, and the fiberscope B is pulled out to the vicinity of the end, the pullout restrictor 3 is attached to the two guide rollers 1 as shown in FIG. 3B. Upon pressing, the fiberscope B is not pulled out any more and automatically stops.

(Embodiment) FIGS. 1 and 2 show one embodiment of the fiberscope winding device of the present invention. Reference numeral 1 in FIG. 1 (a) is a pair of two guide rollers. As shown in FIG. 1, this guide roller 1 is attached to a fixed frame 4 of a winding device so as to face each other vertically as shown in FIG. 2, and a passage through which a fiberscope B passes between both guide rollers 1. 2 is formed.

The guide roller 1 serves not only as a guide when the fiberscope B is wound and pulled out, but also for pressing a pullout restrictor 3 described later. The guide roller 1 of this embodiment has an outer peripheral shape in which the central portion in the axial direction is recessed in an arc shape as shown in FIG. 2 so that the fiberscope B does not easily protrude to the outside. Further, the fiberscope B is made of a material such as plastic so that the fiberscope B is slippery and is rotatable.

2 shown in FIG. 2 is a passage through which the fiberscope B passes. The passage 2 is made slightly wider than the diameter of the fiberscope B so that the fiberscope B can easily pass therethrough.

3 of FIG. 3 (a) is attached to the outer circumference of the fiber scope B on the winding start end side along the circumferential direction thereof, and is pressed against the guide roller 1 as shown in FIG. 3 (b), It is a drawer regulator that regulates the drawer of the fiberscope B.

The pull-out restrictor 3 is a ring 5 having a tapered portion 4 formed on the front side, a slit 6 is provided in a part of the ring 5, and both sides of the slit 6 can be fixed to the fiberscope B by tightening with bolts 7. Is done.
Further, the pull-out restrictor 3 is formed of a material having a high cushioning force such as soft plastic or rubber so that the impact at the time of pushing the guide roller 1 can be alleviated.

FIG. 4 shows another embodiment of the drawer regulator 3. The drawer regulator 3 has a passage 2 between the guide rollers 1 at the tip thereof.
A tapered entry cylinder part 10 is formed to enter the inside halfway,
A retaining portion 11 having a large diameter that is pressed against the guide roller 1 is formed in the rear portion thereof. In the case of the pull-out restrictor 3, since the entrance portion 10 gradually enters between the guide rollers 1 when the guide roller 1 is pushed, the impact on the guide roller 1 at the time of pushing is alleviated. Moreover, this drawer regulator 3
Is made of a soft rubber material so that it can be attached closely to the fiberscope B.
By inserting the slit 12, the slit 12 can be opened, removed from the image scope B, and easily replaced at a desired position of the scope B.

FIG. 5 shows another embodiment of the drawer regulator 3. As shown in FIG. 5 (a), the pull-out restrictor 3 is provided with a spring or the like between a locking body 15 fixed to the fiberscope B and a pusher 16 for pushing the guide roller 1. Buffer 17
Is intervened. When the pullout restrictor 3 is pressed against the guide roller 1 as shown in FIG. 5 (b), the presser 16 slides to the side of the locking body 15 and the cushioning body 17 is contracted. The shock is alleviated. Further, a stopper 18 such as a snap lock (trade name) is attached to the locking body 15. When the operator 19 of the snap lock is opened, it can be detached from the fiberscope B and the operator 19 is closed. It can be fixed to the fiberscope B.

The outer shape of the pullout restrictor 3 in the present invention is set to be larger than the outer diameter of the fiberscope B and larger than the width of the passage 2 so as to be pressed against the guide roller 1, but if the outer dimension is too large. Since the fiberscope B is disturbed when the fiberscope B is wound on the winding drum A and the fiberscope B is collapsed, it is desirable that the fiberscope B has a size that does not interfere.

(Effect of the Invention) The fiberscope withdrawal stopping mechanism in the fiberscope winding device of the present invention has the following effects.

． Since the draw-out restrictor 3 is attached to the outer circumference of the fiberscope B on the winding start end side, when the fiberscope B is drawn out by a desired length, the draw-out restrictor 3 pushes against the two guide rollers 1 and the fiber The withdrawal of the scope B is automatically stopped. Therefore, the extra length of the scope B wound on the winding drum A is also pulled out, and the end of the fiberscope B is fully extended.
The fiberscope B does not break.

． Since the pullout restrictor 3 is attached to the winding start end side of the fiberscope B, the fiberscope B can be pulled out by a required length.

． Since the two guide rollers 1 are opposed to each other, the fiberscope B is sandwiched by the two guide rollers 1 and drawn out in the passage 2, and the fiberscope B is smoothly drawn out without lateral shake during the drawing. In addition, since the lateral swing does not occur, the pull-out restrictor 3 reliably presses the guide roller 1. Incidentally, such an effect cannot be obtained when the number of the guide rollers 1 is one.

． Since the fiberscope B does not shake laterally during drawing, the drawing regulator 3 is reliably pressed against the guide roller 1 without coming off from the guide roller 1. For this reason, the outer shape of the draw-out restrictor 3 can be reduced, so that the draw-out restrictor 3 does not become an obstacle when the fiberscope B is wound on the winding drum.

． Since the draw-out restrictor 3 is attached to the outer circumference of the fiberscope B on the side of the starting end portion along the circumferential direction thereof, the draw-out restrictor 3 projects substantially evenly in the circumferential direction of the fiberscope B, and any part of the projecting restrictor 3 is surely projected. Hit the guide roller 1.

． Since the draw-out restrictor 3 is attached along the circumferential direction of the fiberscope B, it does not extremely project to the outside of the fiberscope B and does not interfere with the winding of the fiberscope B, and the fiberscope B Is difficult to collapse.

． Since the outer shape of the draw-out restrictor 3 is made larger than the outer diameter of the fiberscope B and the width of the passage 2, the draw-out restrictor 3 does not come out of the passage 2 and is reliably stopped.

． Since it is composed of two guide rollers 1 for guiding the fiberscope to be pulled out and the pullout restrictor 3 that abuts against it, the structure is simple and inexpensive.

[Brief description of drawings]

FIG. 1 (a) is a front view of a fiberscope pull-out stopping mechanism in the fiberscope winding device of the present invention, FIG. 1 (b) is a side view of the device, and FIG. 2 is a detailed view of a portion E of FIG. 3 (a) and 3 (b) are perspective views showing an example of use of the drawer restrictor in the present invention, FIG. 4 is a use explanatory view of another embodiment of the drawer restrictor in the present invention, and FIG. a),
FIG. 6B is an explanatory view of the use of another example of the withdrawal restrictor in the present invention, FIG. 6A is a front view of a conventional fiberscope winding device, and FIG. 6B is a side view of the device. 1 is a guide roller 2 is a passage 3 is a pullout restrictor A is a drum B is a fiberscope

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiji Higo 5-1-9 Higashi-Hachiman, Hiratsuka-shi, Kanagawa Furukawa Electric Co., Ltd. Hiratsuka Plant (72) Creator Yasuhide Miyazaki 5-1 Higashi-Hachiman, Hiratsuka-shi, Kanagawa 9 Inside Furukawa Electric Co., Ltd. Hiratsuka Plant (72) Creator Koichi Kumagai 5-1-9 Higashi-Hachiman, Hiratsuka City, Kanagawa Prefecture Furukawa Denki Industry Co., Ltd. Hiratsuka Plant (56) References Japanese Patent Publication Sho 60-52060 (JP) , B2)

Claims (1)

[Scope of utility model registration request] 1. A fiberscope winding device having a winding drum A for winding a fiberscope B, wherein two guide rollers 1 are opposed to each other, and
A passage 2 through which the fiberscope B drawn from the winding drum A passes is formed, and is larger than the outer diameter of the fiberscope B along the circumferential direction on the outer circumference of the winding start end side of the fiberscope B, A pullout restrictor 3 having an outer shape larger than the width of the passage 2 is attached so as to be pressed against the guide roller 1 when the fiberscope B is pulled out. .