JP3747286B2 - Tool for removing waterstop material for pipes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention mainly removes the water stop material provided at the mouth of the cable conduit in the manhole, mainly for inspection work of underground cables and pipes, installation work of new cables, and other work. It relates to a tool for use.
[0002]
[Prior art and problems to be solved by the invention]
The underground cable is laid and accommodated in a cable conduit buried underground. Each pipe line communicates between manholes provided at a predetermined distance and opens in the manhole. In particular, the openings are opened in parallel in multiple rows. As shown in FIG. 7, the pipe 30 in use has a cable C inserted therethrough, and the mouth 31 of the duct 30 is slightly inward to stop water and prevent gas inflow and outflow. In the gap S between the inner peripheral surface of the cable and the outer peripheral surface of the cable, a water stop material 32 as a stuffing is provided.
[0003]
As the water-stopping material 32, a so-called water-foaming water-stopping material that reacts by touching water and foams and expands to exhibit a water-stopping effect is used. This water-stopping material is in a state of being firmly fixed to the mouth of the pipe line and slightly inward, and it is not easy to remove it.
[0004]
For example, when a new cable is inserted into the pipe line or when the pipe line is inspected, it is necessary to remove the water-stopping material. Using a rounded and curved driver-type removal tool, etc., the water-stopping material is scraped off by applying a strong force manually. This work has a large risk of accidentally damaging existing cables, and is a difficult and time-consuming work, which is extremely inefficient. Although some attempts have been made to use an electric drill, in this case, even if the work efficiency is improved, the risk of damaging the cable is further increased.
[0005]
As described above, since the work for removing the water stop material is performed using a general tool, publicly known documents relating to this are not found within the scope of the applicant's knowledge.
[0006]
The present invention has been made in view of the above, and provides a pipe water-stopping material removal tool that can easily and efficiently remove a pipe water-stopping material without fear of damaging a cable. It is.
[0007]
[Means for Solving the Problems]
The present invention for solving the above-mentioned problems is a tool for removing a water stop material for a pipe attached to a cable and a mouth of a pipe for a cable in the pipe, the inner circumference of the pipe A protective cylinder that can be inserted into the gap between the surface and the cable inserted into the pipe line, and a scraper blade of a water-stopping material attached to the tip, and inserted into the protective cylinder from the scraper blade side. The rod-shaped tool body is rotatably supported and has a rear end portion protruding rearward from the rear end of the protective cylinder. The rod-shaped tool body is urged toward the rear end by a spring means with respect to the protective cylinder. The scraper blade is held in the protective cylinder by the biasing force of the spring means , and the scraper blade is applied to the biasing force by pushing from the rear end side portion protruding from the rear end of the protective cylinder. It is provided so that it can protrude from the tip of the protective cylinder against this, and in this protruding state Mounting portion of the rotary tool to the rear end portion so that it can impart rotation from the serial rear end portion, characterized in that the thus provided.
[0008]
According to this pipe water-stopping material removal tool, when the water-stopping material provided in the gap between the inner peripheral surface of the pipe port portion and the cable outer peripheral surface is removed using the tool, Hold the tube so that its tip touches the water stop material, and in this state, rotate it with the rotary tool attached to the rear end side part protruding from the rear end of the protective cylinder with respect to the rod-shaped tool body in the protective cylinder. And the rod-shaped tool body is pushed from the rear end side portion so that the scraping blade at the tip protrudes from the tip of the protective cylinder against the urging force in the rear end direction by the spring means, and the scraping blade The water stop material is scraped off by rotation. The protruding amount of the scraping blade can be easily adjusted by the degree of pushing from the rear end side portion, and the scraping operation can be performed with a favorable protruding amount according to the scraped state.
[0009]
During the scraping operation, the rotating rod-shaped tool body is held in the protective cylinder and does not come into contact with the cable. In addition, the tip scraping blade also protrudes slightly only at the time of scraping, and it is inserted into the gap between the inner peripheral surface of the mouth of the pipe and the outer peripheral surface of the cable, or the gap When it is pulled out from the cable, it is stored and held in the protective cylinder by the urging force, so that the scraping blade does not contact the cable and the handling operation is safe. Therefore, the rod-shaped tool body can be rotated and operated without fear of damaging the cable, and the water stop material can be removed safely and efficiently.
[0010]
In addition, as a means for giving rotation to the rod-shaped tool body, it is also possible to use an electric tool that can chuck the rear end side portion of the rod-shaped tool body protruding from the rear end of the protective cylinder as a rotating tool. manually it may be to give the rotation by a rotation handle which can be attached to the rear end portion. In view of work efficiency, it is preferable that an electric tool can be used.
[0011]
It is preferable to provide a stopper for restricting protrusion of the scraping blade beyond a certain level by contacting the rear end of the protective cylinder at the rear end portion of the rod-shaped tool body. Thereby, the excessive protrusion of a scraping blade can be prevented, it can work safely, and the effect of preventing damage to a cable is also heightened. In particular, if the stopper is attached to the rear end side portion by a screwing means or the like so that the position can be adjusted, the maximum protrusion amount of the scraping blade can be easily adjusted.
[0012]
It is preferable that a discharge port for discharging the scraped water-stopping material waste is provided in the vicinity of the tip of the protective cylinder where the scraping blade is stored. Thereby, when the water stop material scraped off by rotation of the scraping blade enters the inside from the tip of the protective cylinder, the water stop material waste can be discharged from the discharge port, and clogging in the protective cylinder can be prevented. .
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described based on examples shown in the drawings.
[0014]
FIG. 1 is a longitudinal sectional view showing a first embodiment of a tool for removing a pipe water-stopping material according to the present invention, a part of which is omitted, FIG. 2 is a plan view of a part of the same, and FIG. FIG. 4 is a front view from the front end side, and FIG. 4 is a longitudinal sectional view showing a state in which the scraping blade is protruded.
[0015]
In the figure, reference numeral 10 denotes a protective cylinder that can be inserted into the gap S between the inner peripheral surface of the cable conduit 30 and the cable C inserted into the mouth portion 31 of the conduit 30, and usually has a diameter. It consists of a cylinder having a length of 20 to 30 mm and a length of 250 to 350 mm. Reference numeral 20 denotes a rod-shaped tool body inserted through the protective cylinder 10, and its overall length is about 50 to 100 mm longer than the protective cylinder 10 and is usually about 300 to 450 mm. Of course, implementation outside the above-mentioned dimension range is also possible.
[0016]
The rod-shaped tool body 20 is provided with a scraping blade 21 of a water-stopping material 32 at the tip, is inserted into the protective cylinder 10 from the scraping blade 21 side, and is spaced from the center in the protective cylinder 10. The bearing members 12, 12 arranged at the shaft are rotatably held in the shaft center portion. Usually, the scraping blade 21 is located inside the tip of the protective cylinder 10. Further, a rear end portion 22 of a required length protrudes from the rear end of the protective cylinder 10. Reference numeral 13 denotes a cap member attached to the rear end of the protective cylinder 10, and reference numeral 14 denotes a fixing screw for the bearing members 12 and 12.
[0017]
The rod-shaped tool body 20 is attached to the protection tube 10 by a spring 24 disposed between the seat member 23 fixed to the rod-shaped tool body 20 and the one bearing member 12 in the protection tube 10. The scraping blade 21 is held in the front end portion of the protective cylinder 10 by the biasing force of the spring 24 and pushed by the rear end side portion 22. The scraper blade 21 is provided so that the required length on the blade edge side can protrude from the tip 11 of the protective cylinder 10 against the biasing force. Reference numeral 21a denotes a cutting edge portion.
[0018]
The rear end side portion 22 of the rod-shaped tool body 20 has an end required length formed as a rotary tool mounting portion, for example, a hexagonal cross section or other angular shaft, and the angular shaft portion 25 is electrically driven by an electric drill or the like. It is provided so that it can be chucked by a chuck part (not shown) of the tool, and is configured so that rotation can be given to the rod-shaped tool body 20 by an electric tool that chucks the angular shaft portion 25. ing. In addition, it is also possible to implement a configuration in which a rotation handle (not shown) is attached to the rear end side portion 22 of the rod-shaped tool body 20 to manually rotate it.
[0019]
A stopper that restricts the scraping blade 21 from protruding beyond a predetermined amount on the rear end portion 22 of the rod-shaped tool body 20 protruding from the rear end of the protective cylinder 10 by contacting the rear end of the protective cylinder 10. 26 is provided. In the case of the figure, a portion closer to the protective cylinder 10 than the angular shaft portion 25 in the rear end side portion 22 is formed as a screw portion 27, and the stopper 26 is screwed and attached to the screw portion 27. By adjusting the screwing position of the stopper 26, the distance between the stopper 26 and the rear end of the protective cylinder can be changed, and the protruding dimension a on the cutting edge side of the scraping blade 21 from the front end 11 of the protective cylinder is arbitrarily adjusted. It is provided so that it can. Usually, the projecting dimension a of the scraping blade 3 is set to a maximum of 30 mm, preferably 20 mm, and more preferably about 5 to 10 mm. Reference numeral 28 denotes a fixing screw for the stopper 26 so that the protruding dimension a which is adjusted and set can be fixed and used.
[0020]
Reference numeral 15 in the figure denotes a water stop material discharge outlet formed in a square shape in the vicinity of the tip portion of the protective cylinder 10 where the scraping blade 21 is housed. It is provided so that the water-stopping material waste that enters can be discharged out of the protective cylinder 10. The discharge port 15 is opened on the tip side from the first bearing member 12 from the tip. The number of the discharge ports 15 is not limited to one, and a plurality, preferably 2 to 3, can be provided at intervals in the circumferential direction. Further, if necessary, an inclined guide (not shown) for guiding the water-stopping material waste to the discharge port 15 can be provided.
[0021]
Note that the scraping blade 21 of the rod-shaped tool body 20 is not limited to the shape in which the blade tip portion 21a has three sharp triangular protrusions as in the embodiment of FIGS. As long as the water-stopping material 32 can be scraped off by rotation, such as a blade shape having a single triangular protrusion, the blade shape may be any shape. Further, the means for fixing the scraping blade 21 to the rod-shaped tool body 20 is not limited to the one using the rivet 29 as shown, and various implementations are possible.
[0022]
Furthermore, as a means for biasing the rod-shaped tool body 20 toward the rear end, is provided with the spring 24 in the protective cylinder 10, In addition, also spring such the spring utilize other spring means It is also possible to provide the means on the outer side of the rear end side portion 22 rearward from the protective cylinder 10. In practice, it is preferable to provide a spring 24 in the protective cylinder 10 as shown in the figure.
[0023]
When removing the water stop material 32 provided in the clearance S between the inner peripheral surface of the pipe port 31 and the outer peripheral surface of the cable C by using the above-described tool for removing the water stop material for the pipe line 6, the protective cylinder 10 is held so that the tip 11 of the protective cylinder 10 is brought into contact with the water stop material 32, and in this state, the rear of the protective cylinder 10 with respect to the rod-shaped tool body 20 in the protective cylinder 10. together impart a rotational, for example, by the power tool mounted on the rear end portion 22 which projects from the end, the spring blade edge portion 21a of the scraping blades 21 of the tip by pushing the rear end portion 22 of the rod-shaped tool body 20 It is made to protrude from the front end 11 of the protective cylinder 10 against the urging force in the rear end direction by 24, and the water stop material 32 is scraped off by the rotation of the scraping blade 21. At this time, when the stopper 26 abuts against the rear end of the protective cylinder 10, the scraping blade 21 can be prevented from excessively protruding.
[0024]
In the scraping operation, the rotating rod-shaped tool body 20 is held in the protective cylinder 10 and does not come into contact with the cable C. Also, the scraping blade 21 at the tip is scraped. Only when the cutting edge protrudes slightly, it is housed in the protective cylinder 10 by the biasing force as long as it is not pushed from the rear end side portion 22 when inserted into the gap S or pulled out from the gap S. Since the scraping blade 21 does not come into contact with the cable C and is prevented from excessive protrusion, the scraping blade 21 can be easily and safely operated.
[0025]
【The invention's effect】
As described above, according to the tool for removing a water stop material for a pipe line of the present invention, a work for removing a water stop material, for example, a water-foaming water stop material, which is firmly fixed to a pipe port portion. Without damaging the cable, the rod-shaped tool body in the protective cylinder can be rotated and easily operated, and the water stop material can be removed safely and efficiently.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a longitudinal sectional view, with a part omitted, illustrating an embodiment of a tool for removing a water stop material for a pipe line of the present invention.
FIG. 2 is a plan view in which a part of the above is omitted.
FIG. 3 is a front view from the tip side.
FIG. 4 is a longitudinal sectional view showing a state in which the scraping blade is protruded.
FIG. 5 is a partial front view showing another example of the scraping blade.
FIG. 6 is an explanatory diagram of a water stop material removing operation state.
FIG. 7 is a cross-sectional view showing an attachment state of a water stop material for pipes.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Protection cylinder 11 Protection cylinder front-end | tips 12, 12 Bearing member 13 Cap member 15 Discharge port 20 Rod-shaped tool body 21 Scraping blade 22 Rear end side portion 23 Seat member 24 Spring 25 Square shaft portion 26 Stopper 27 Screw portion 30 Pipe 31 Mouth 32 of the pipe Water-stopping material a Projecting dimension C of the scraping blade C Cable S Clearance

Claims (3)

A tool for removing a water stop material for a pipe attached to a cable and a mouth of the pipe for a cable in the pipe,
A protective cylinder insertable into a gap between the inner peripheral surface of the pipe and the cable inserted into the pipe;
A rod-shaped tool having a water-scraping scraper blade attached to the tip, inserted through the protective cylinder from the scraper blade side and held rotatably, and a rear end portion protruding rearward from the rear end of the protective cylinder The body,
The rod-shaped tool body is urged toward the rear end by a spring means with respect to the protection cylinder, and the scraping blade is held in the protection cylinder by the urging force of the spring means , and from the rear end of the protection cylinder The scraping blade is provided so as to be able to protrude from the front end of the protective cylinder against the urging force by pushing from the protruding rear end side portion, and in this protruding state, rotation is applied from the rear end side portion. A tool for removing a water-stopping material for a pipeline, wherein a mounting portion for a rotary tool is provided on the rear end side portion so as to be able to do so.   The water stop for pipes according to claim 1, wherein a stopper is provided at a rear end side portion of the rod-shaped tool body so as to restrict protrusion of the scraping blade beyond a certain level by contacting the rear end of the protective cylinder. Tool for removing material.   3. The conduit for a pipe according to claim 1, wherein a discharge port for discharging the scraped water-stopping material waste is provided in the vicinity of the tip of the protective cylinder where the scraping blade is stored. Tool for removing water blocking material.

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