JPH075921Y2 - Pipe scraper tool - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a pipe scraper tool, which is suitable for use at a work site where there is an underground pipe for carrying an electric drill, which is a drilling tool. A pipe scraper tool that can be used as a power source.

(Conventional technology and its drawbacks) A work hole is dug from the surface of the earth where there is a buried pipe such as a gas pipe, and the buried pipe is dug out to connect a new branch pipe or part of the buried pipe. In replacement work, a saddle of a resin branch pipe is welded to a resin embedded pipe.

In this case, regardless of whether the pipe is a new pipe or a pipe that is buried and soiled with soil, stable fusion bonding strength cannot be obtained unless the oxide film formed on the surface of the pipe material is scraped off during manufacturing.
Therefore, when fusing the saddle to the main pipe, cutting the surface of the pipe material is a prerequisite. Conventionally, the oxide film was scraped off by a manual scraper having a scraping blade on the lower surface of the tip. However, such a scraper is difficult to use, and there are drawbacks such that it takes too much time to clean the outer circumference (side) of the resin pipe for welding the saddle. Therefore, a scraper that can be used with a simple power source is desired. .

(Problems to be solved by the invention, Purpose of the invention) In view of the above, the invention is to solve the problem of developing a pipe scraper tool that can be powered by an electric drill that is always loaded in a pipe work vehicle such as a gas pipe. Is the purpose of.

(Means for Solving the Problem) The pipe scraper tool of the present invention is adapted to solve the above-mentioned problem, and the outer circumference is shaped to approximate the inner circumference of the cutting pipe, and the inner circumference is in the direction of the mouth of the cutting pipe. In addition to having a tapered inner surface that is narrowed, a coret member divided into several pieces in the circumferential direction, and an external thread that is an outer surface similar to the inner peripheral shape of the coret member and that has a nut screwed into the part protruding from the coret member are provided. Further, a diameter-expanding member fitted in the collet member so as to be freely movable in the axial direction and a female screw formed in a central hole of the diameter-expanding member are screwed into a projecting portion, and the projecting end is sandwiched by an electric drill spindle chuck. And a scraper blade that is attached to the cutting rod that is fixed to the cutting rod and that protrudes substantially parallel to the outer circumference of the cutting pipe so that it contacts the outer circumference of the cutting pipe. It is characterized by being equipped with an object and has brought in an electric drill as a power source into a work hole dug from the ground, and this tool makes it possible to easily scrape off the outer circumference of the cutting pipe and easily remove mud etc. There is a nature.

(Embodiment) The attached drawings show an embodiment of the present invention. Fig. 1 is a partially longitudinal plan view, Fig. 2 is the same plan view, and Fig. 3 is an enlarged front view taken along the line AA of Fig. 1. .

P is a cutting pipe, 1 is a collet member, and is composed of several divided members 2 and 2 equally divided in the axial direction, and an axial expansion / contraction gap S is formed between these divided members. ,
A ring-shaped coil spring 4 is fitted in the circular recessed holes 3 to 3 formed on the outer circumference of each divided member, and the elastic force of the spring closes the gap S for bundling. The outer circumferences in the axial direction of the divided members 2 to 2 are circular outer surfaces 5 to 5 which are generally approximate to the inner circumference surface of the cutting pipe P, and the inner circumference is a tapered inner surface narrowed in the direction of the mouth of the cutting pipe P. 6 to 6, the tapered inner surfaces 6 to 6 are followed by arc portions 7 to 7 having the same thickness, and flanges 8 to 8 which engage with the end surface of the cutting pipe P are provided at the outer end portions. Become.

Reference numeral 9 designates an outer surface as a tapered projecting surface 10 having a shape similar to the tapered inner surfaces 6 to 6 of the split members 2 to 2 of the collet member 1, and the tapered projecting surface 10 is followed by a straight outer surface 11 having a slightly smaller diameter. , A male screw 12 is engraved on the outer surface of the straight line, a center hole 13 is further provided at the center of the tapered projecting surface 10 and the straight outer surface 11, and a female screw 14 is provided on the inner periphery of the outer hole of the center hole 13 for diameter expansion. A member, which is fitted in the collet member 1 so as to be freely movable in the axial direction.

Reference numeral 16 denotes an outer peripheral threaded portion 17 that passes through the center hole 13
With the screw rod screwed onto the female screw 14, the screw portion 17 is projected from the collars 8, 8, 8. The screw rod 16 has a small-diameter screw rod 18 having a reduced outer diameter and a head shaft portion 19 sandwiched between the main shaft chuck 32 of the electric drill and the concentric shaft rod portion 19 which are successively formed concentrically.
An arm 20 which is substantially perpendicular to the threaded rod 16 is fitted to and fixed by a nut 21, and a blade supporting rod which moves along the outer surface of the pipe P at the protruding end of the arm 20 and is substantially parallel to the axial center of the threaded rod 15.
22 is attached, and the scraper blade 23, which cuts the outer surface of the pipe P by about 0.1 mm to the rod 22, is replaceably fixed.

A projecting rod 24 parallel to the blade supporting rod 22 is fixed to the arm 20, the tip of a screw member 25 screwed onto the blade supporting rod 22 is applied to the projecting rod 24, and the screw member 25 is screwed forward to advance the blade supporting rod 22. 2 can be slightly swung in the direction of the arrow in FIG. 2, the degree of contact of the scraper blade 23 with the pipe P can be adjusted.

The collet member 1 is attached to the male screw 12 on the straight outer surface 11 of the member 9 for expanding the diameter.
The tightening nuts 31 to be pressed against the brims 8 to 8 of the divided members 2 to 2 are screwed together.

(Operation) The operation of the present invention will be described.

In the tool of the present invention, the collet member 1 is inserted into the cutting pipe P and the collars 8 to 8 are engaged at the end openings as shown in FIG.
When the nut 31 is screwed into the male screw 12 provided on the straight outer surface 11 of the diameter-expanding member 9 projecting from 8 to 8, the diameter-expanding member 9 is pulled out and the taper-shaped protruding surface 10 is formed. The tapered inner surfaces 6 to 6 of the respective divided members 2 to 2 are used as the first pipe P.
Sliding in the direction of the end port on the right side of the figure, the collet member 1 is expanded to fix the circular outer surfaces 5 to 5 to the inner surface of the cutting pipe P by pressure.

Then, the head shaft portion 19 is clamped and fixed to the main shaft chuck 32 of the portable electric drill, and the screw rod 16 in which the screw portion 17 is screwed into the female screw 14 is turned in the direction of arrow X in FIG. The scraper blade 23 moves in the direction of the arrow Y while rotating with the arm 20 and the blade support rod 22 to scrape the outer surface of the cutting pipe P or remove dirt such as mud.

(Effects) The present invention has the above-described constitutional action, and the outer circumference is shaped to approximate the inner circumference of the cutting pipe P, and the inner circumference is the tapered inner surface 6 narrowed in the direction of the mouth of the cutting pipe P. Together with the collet member 1 divided into several pieces in the circumferential direction, and the outer surface that is close to the shape of the tapered inner surface 6 of the inner circumference of each of the split members 2 to 2 of the collet member 1, and protrudes from the collet member 1. A male screw 12 for screwing a nut 31 is provided at a portion thereof, and a diameter expanding member 9 is fitted in the collet member 1 so as to be movable in the axial direction, and a female screw 14 formed in a center hole 13 of the diameter expanding member 9 is screwed. A head shaft portion 19 which is screwed into the portion 17 to project, and which is sandwiched at the projecting end by the electric drill spindle chuck 32.
A screw rod 16 provided with a scraper blade mounted on the blade support rod 22 fixed to the screw rod 16 and protruding substantially parallel to the outer circumference of the cutting pipe P so as to be in contact with the outer circumference of the cutting pipe P.
23 and a member 9 for expanding the diameter by screwing the nut 31.
Is pulled out from the collet member 1 to fix the collet member 1 and the diameter-expanding member 9 to the cutting pipe P, and further, the screw rod.
16 spindle check driven by electric drill motor
The pipe P is rotated by the scraper blade tool 23 that rotates by 32 and advances by the female screw 14 of the center hole 13 of the diameter-expanding member 9 fixed as described above to rotate and screw together with the screw rod 16.
It has the effect that the work of shaving the surface of or removing the adhering mud can be performed accurately, precisely and at high speed.

BRIEF DESCRIPTION OF THE DRAWINGS The attached drawings show an embodiment of the present invention. FIG. 1 is a partially longitudinal plan view, FIG. 2 is the same plan view, and FIG. It is a figure. P ... Cutting pipe, 1 ... Collet member, 2 ... Dividing material, 5 ... Circular outer surface, 6 ... Tapered inner surface, 7 ...
Arc part, 9 ... Expanding member, 10 ... Tapered surface,
11 …… Straight outer surface, 12 …… Male thread, 13 …… Center hole, 14 ……
Female thread, 16 …… Screw rod, 17 …… Screw part, 18 …… Small diameter screw rod, 19 …… Head shaft part, 20 …… Arm, 21 …… Nut,
22 …… Blade supporting rod, 23 …… Scraper blade, 32 …… Spindle chuck of electric drill

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Makoto Ohno 3-60 Kamiiida Nishimachi, Kita-ku, Nagoya-shi, Aichi Asada Co., Ltd. (56) References JP-A-62-224502 (JP, A) Actual development Sho-49 -61189 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A collet member divided into a plurality of pieces in the circumferential direction, which has a tapered inner surface whose outer circumference is close to the inner circumference of the cutting pipe and whose inner circumference is narrowed in the direction of the mouth of the cutting pipe. A male screw for screwing a nut is provided on an outer surface which is close to the inner peripheral shape of the collect member, and a portion projecting from the collect member, and a diameter expanding member which is fitted to the collect member so as to be freely movable in the axial direction, and the diameter expanding member. A threaded rod provided with a threaded portion that is screwed into a female thread formed in the center hole of the working member and is provided with a headed shaft portion that is clamped to the electric drill spindle chuck at the projecting end, and is fixed to the threaded rod to fix the cutting pipe. A pipe scraper tool comprising a blade support rod protruding substantially parallel to the outer periphery and a scraper blade attached so as to contact the outer periphery of the cutting pipe.