JPH09300102A - Scraper for cutting tube surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably reduce the operation for moving a core member and a cutting edge, by installing a cut engagement and removement lever to press an outer face at a spring side, of a screw engagement and removement lever, to the inside. SOLUTION: A cutting edge 41 of a cut engagement and removement lever 4 mounted on a handle grip body 2, is pressed by a coil spring 43, so that the cutting edge is moved in the axial direction, while rotated around a resin tube 10 inserted into a core member 1, to cut an outer peripheral face of the resin tube 10. When cutting of the resin tube 10 has been completed, the basic side of the cut engagement and revilement lever 4 is pressed by a hand, to separate the cutting edge 41 from the surface of the resin tube 10, and a female screw 32 member of a screw engagement and removement lever 3 is separated from a male screw 13. Accordingly the handle group body 2 can be rapidly moved to the initial cutting position without damaging the surface of the resin tube 10 by the cutting edge 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe surface for cutting an outer peripheral surface of a pipe in order to remove dirt and oxide film on a connecting end portion of the resin pipe when the resin pipe is fusion-bonded to a resin joint. The present invention relates to a scraper for cutting.

[0002]

2. Description of the Related Art As a conventional tool for cutting a pipe surface, there is one shown in FIG. 4 disclosed in Japanese Utility Model Laid-Open No. 63-189521. In this case, when cutting the pipe surface, a threaded member 94 is provided so as to project on a guide ring 95 threadedly engaged with a male thread of a shaft 93, and a handle nut 9 threadedly engaged with this threaded member 94.
6 is tightened, the bite holder 97 is pressed against the surface of the pipe 5, and the handle nut 96 is cut while rotating around the resin pipe 5. Further, the fixing to the pipe 5 is to fix the shaft 93 to the inner surface of the pipe 5 by axially compressing and expanding the rubber plug 98 inserted into the inner surface of the pipe by tightening the nut 99.

[0003]

SUMMARY OF THE INVENTION The conventional scraper described above adjusts the force for pressing the cutting tool against the surface of the pipe 5, and
The handle nut 96 and the nut 99 must be tightened to fix each other.
It is difficult to adjust the degree of tightening because the cutting depth on the surface of the pipe 5 is affected. Further, when the handle nut 96 is rotated to rotate the bite around the pipe 5, there is a problem that the degree of tightening of the handle nut 96 changes during the rotation. Therefore, there is a problem that it is difficult to perform the work of rotating the cutting tool during the cutting work. The present invention solves the above problems and provides a scraper for cutting a surface of a resin pipe which is small and lightweight and has good workability.

[0004]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a core member having a locking outer surface for inserting and locking the inner surface of the end of a resin pipe at the tip and a male thread for guiding in the center. , A grip body on which the core member is slidably mounted in an axial direction, and a lever which is swingably mounted on the grip body by a pin joint, and a tip of the lever is provided with a female screw piece screwed to the male screw. The base end side of the lever includes a screw engagement / disengagement lever provided to urge the female screw piece toward the male thread side with a spring interposed between the lever and the grip body, and a screw engagement / disengagement lever of the grip body. A lever is provided so that it can swing freely by a pin joint on the outside, and a cutting edge for cutting the surface of the resin pipe locked to the locking outer surface is provided at the tip of the lever, and the base end side of the lever is a coil spring with the grip body. The cutting edge is urged toward the surface of the resin tube through the A pipe surface cutting scraper, characterized in that the more the cutting-engaged lever provided so as to press the spring-side outer surface of the chromatography.

In the above description, it is preferable that the male screw of the core member and the female screw piece of the engaging / disengaging lever are screwed to each other so as to be removed by forced movement of the core member in the axial direction. Also,
A locking collar may be provided at the base end of the core member, and the locking flange may be locked to the grip body to regulate the sliding distance of the core member so that the core member does not protrude from the grip body. The outer surface of the cutting engagement / disengagement lever on the spring side may be exposed to the outside of the grip body so that it can be pressed by hand.

[0006]

Since the present invention has the above structure, when the inner surface of the end portion of the resin pipe is inserted into the locking outer surface of the core member, the resin pipe and the core member are fixed by the elastic force of the resin pipe. When the grip body is rotated by hand in this state, the female screw piece of the screwing engagement / disengagement lever attached to the grip body is pressed by the spring, so that the grip body is screwed into the male screw of the core member and the grip body moves to the core. Guided by the male thread of the member, it moves back and forth. For this reason, the cutting blade of the cutting engagement / disengagement lever attached to the grip body is pressed by the coil spring, so that the outer peripheral surface of the resin pipe is cut by advancing and retreating in the axial direction while rotating around the resin pipe inserted in the core member. . The female thread piece of the screwing engagement / disengagement lever attached to the grip body and the cutting blade of the cutting engagement / disengagement lever are both urged by a spring and a coil spring on the lever base side. Is urged against the surface of the resin pipe to perform cutting. Since the resin pipe is cut while it is inserted into the locking outer surface, the flatness and bending of the resin pipe are corrected, and the resin pipe is cut in a perfect circle and in a straight pipe state, and a uniform pipe surface is cut. Be seen.

When the cutting of the resin pipe is completed, the cutting edge is separated from the surface of the resin pipe by pressing the outer surface of the base of the cutting engagement / disengagement lever, and at the same time, the inner surface of the base of the cutting engagement / disengagement lever is engaged / disengaged. Since the outer surface of the lever on the base side is pressed, the female thread piece of the screw engagement / disengagement lever separates from the male thread of the core member. Therefore, the grip body can be rapidly moved to the first cutting position without damaging the surface of the resin pipe by the cutting edge. For this reason, the cutting work may be performed by rotating the grip body so as to proceed from the end side of the resin pipe toward the back, or after moving the cutting blade to the back of the resin pipe first, move toward the end. Even if cutting is performed, the cutting blade can be easily moved by pressing the base side of the cutting engagement / disengagement lever, and the movement of the cutting blade does not damage the surface of the resin pipe.

Therefore, the rotary rewinding work of the grip body after the cutting work is omitted and the work is simplified. Further, the cutting blade presses the surface of the resin pipe with a uniform force by pressing with the coil spring of the cutting engagement / disengagement lever, so that the cutting can be performed uniformly. Further, the external thread of the core member and the internal thread of the cutting engagement / disengagement lever are screwed to each other in such a screw shape that they are disengaged from the screw engagement force of the core member in the axial direction. The core member can be forcibly moved in the axial direction without any operation, and the work of returning the core member to the initial position after cutting and removing the resin pipe can be easily performed. Further, by providing an engaging collar on the main body side of the core member and engaging with the grip body, it is possible to perform cutting for a certain distance and the core member does not come off from the grip body.

[0009]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a resin pipe 1 showing an embodiment of the present invention.
2 is an external view thereof, and FIG. 3 is a partially enlarged view showing an embodiment of the screw shape of the screwing guide portion. Main components are a core member 1, a grip body 2 on which the core member 1 is axially slidably mounted, a screw engagement / disengagement lever 3 mounted on the grip body 2 so as to be swingable, and a screw engagement / disengagement lever. Cutting engagement / disengagement lever 4 mounted on the grip body 2 so as to be swingable on the outer surface side of 3
Consists of The core member 1 has a locking member 11 having a locking outer surface at the front end for locking by inserting into the inner surface of the end of the resin pipe 10.
Is fixed by a pin 12 and attached. A male screw 13 for rotation guide is provided at the center, and a locking collar 14 is provided at the base end. The locking brim 14 makes the cutting distance constant,
The core member 1 does not come off from the grip.

The grip body 2 has a substantially cap-like shape on the tip side and an egg-shaped elliptical shape from the center to the head side, and a square hole engaging member for engaging the electric drill or the like on the base end to rotate the grip body. Two
3 is fixed. Male thread 1 of core member 1 inside the center
A cylindrical portion 21 slidably supporting and mounting the outer peripheral surface of the core member 3 is provided, and a sliding space portion 22 for sliding the locking collar 14 of the core member 1 is provided on the base side thereof. A window 24 communicating with the outer surface is provided in the cylindrical portion 21, and an end portion of a later-described screw engagement / disengagement lever 3 for screwing the screw 13 into / out of the window 24 comes in and goes out.

The screw engagement / disengagement lever 3 is swingably mounted on the outer surface side of the sliding space portion 22 by a grip body 2 and a pin joint 31, and is provided with a female screw piece 32 screwed to the screw 13 at the tip thereof. , L-shaped bent through the window 24 to the male thread 13 of the core member
Abutting against. The base side 34 of the lever is the sliding space 2
A spring 33 is interposed between the outer surface 2 and the outer surface of the second member 2 so as to separate them from each other, and the female thread piece 32 at the tip of the lever is biased to the male thread 13. The male screw 13 and the female screw piece 32 may be an ordinary screwing screw, or may have a sawtooth shape as shown in FIG. In this case, when the core member 1 is forcibly moved in the axial direction, the external thread and the internal thread are disengaged from each other, and the core member 1 can be pulled out to the left side in the drawing. , The grip body 2 does not move in the direction into the grip body 2 unless the grip body 2 is rotated. Therefore, the workability when pulling the grip body 2 out of the resin pipe is good.

The cutting engagement / disengagement lever 4 is swingably mounted on the outer surface side of the screw engagement / disengagement lever 3 with a grip body 2 and a pin joint 44, and has a blade 41 for cutting the surface of the resin pipe at its tip. Is attached. The base portion side 42 of the lever is provided so as to be separated from each other with a coil spring 43 interposed between the base portion side 42 and the outer surface of the sliding space portion 22, and the blade 41 at the tip is biased to the surface of the resin pipe. The base portion side 42 of the cutting engagement / disengagement lever is exposed to the outside of the grip body 2, and the inner surface abuts on the outer surface of the screw engagement / disengagement lever 3 on the base portion side 34. By manually pressing the base lever 42 of the cutting engaging / disengaging lever, the base lever 34 of the screw engaging / disengaging lever 3 is also interlocked.

Regarding the cutting procedure, first, the resin tube 10 is inserted into the locking member 11 even when the core member 1 is pulled out from the grip body 2 as shown in FIG. It can be inserted without moving because it is screwed into. Naturally, the core member 1 can be inserted even in the innermost portion of the grip body 2. In this case, the resin pipe 10 is inserted into the locking member in a state in which the base portion side 42 of the cutting engagement / disengagement lever 4 is manually pushed so that the cutting blade 41 does not hit the surface of the resin pipe. The cutting operation is performed by rotating the grip body 2, and when cutting is performed by moving the cutting blade 41 from the end side of the resin pipe 10 to the inner side, after cutting, the base side 4 of the cutting engagement / disengagement lever 4
2 is pushed by hand to separate the cutting blade 41 from the surface of the resin pipe, and the female screw piece 32 of the screw engagement / disengagement lever 3 is separated from the male screw 13 to directly pull out the grip body 2 and remove it from the resin pipe 10. In this state, the core member 1 is pulled out from the grip body 2, and even if the next resin pipe is subsequently inserted, the core member is fixed and can be inserted.

When the cutting blade 41 is moved from the back side to the end side of the resin pipe 10 for cutting, the core member 1 is pulled out from the grip body 2 after the cutting is completed. Pull out from tube 10 and remove. When the external thread 13 of the core member and the internal thread piece 32 of the screw engagement / disengagement lever are screwed into a saw-toothed screw that can move in the direction in which the core member is pulled out from the grip body, when the cutting is completed, The work of removing the resin pipe 10 and returning the work to the initial state can be performed without operating the cutting engagement / disengagement lever 4, and can be simplified.

[0015]

As described above, according to the present invention, the screw engaging / disengaging lever in which the male screw of the core member is attached to the grip body only by inserting the core member into the end portion of the resin pipe and rotating the grip portion. The cutting blade of the cutting engagement / disengagement lever attached to the grip body is screwed with the female screw piece to rotate forward and backward while rotating around the resin pipe for cutting. By operating this cutting engagement / disengagement lever, the screw engagement / disengagement lever is also interlocked, so the work for moving the core member and the cutting blade is greatly simplified,
Further, the movement of the cutting blade in the axial direction does not damage the surface of the resin pipe.

[Brief description of drawings]

FIG. 1 is a sectional view showing a state in which a resin pipe according to an embodiment of the present invention is mounted.

FIG. 2 is an external view of FIG.

FIG. 3 is a partially enlarged view showing an example of a thread shape of a threaded portion of a male screw and a female screw piece.

FIG. 4 is a cross-sectional view showing a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Core member 2 Grip body 3 Screw engagement / disengagement lever 4 Cutting engagement / disengagement lever 10 Resin tube 11 Locking member 12 Pin 13 Male screw 14 Locking collar 21 Cylindrical part 22 Sliding space part 23 Square hole engaging member 24 Window 31 , 44 Pin joint 32 Female thread piece 33 Spring 34 Base part side of screw engagement / disengagement lever 41 Cutting blade 42 Base part side of cutting engagement / disengagement lever 43 Coil spring

Claims (4)

[Claims] 1. A core member having a locking outer surface for inserting and locking the inner surface of the end of a resin pipe at a tip portion, and a male thread for guiding in a central portion, and sliding the core member in an axial direction. A freely attached grip body and a lever are attached to this grip body by means of a pin joint so that the lever can be swung freely.The tip of the lever is provided with a female screw piece that is screwed into the male screw, and the base end side of the lever is the grip body. A screw engagement / disengagement lever provided so as to urge the female screw piece toward the male thread side with a spring interposed between the screw engagement / disengagement lever and a pin joint outside the screw engagement / disengagement lever of the grip body so that the lever can swing freely. And a cutting blade for cutting the surface of the resin pipe locked to the locking outer surface is provided at the tip of the lever, and the cutting edge is cut by the coil spring between the lever and the grip body. Energize the surface and press the spring side outer surface of the screw engagement / disengagement lever inside. A scraper for pipe surface cutting, comprising a cutting engagement / disengagement lever provided in such a manner. 2. The external thread of the core member and the internal thread of the engaging / disengaging lever are screwed together to form a screw that is disengaged by forced axial movement of the core member. The scraper for cutting a pipe surface according to claim 1. 3. The pipe surface according to claim 1, wherein a locking collar is provided at a base end portion of the core member and is locked to the grip body to regulate a sliding distance of the core member. Scraper for cutting. 4. The scraper for pipe surface cutting according to claim 1, wherein an outer surface of the cutting engagement / disengagement lever on the spring side is provided so as to be exposed to the outside of the grip body so as to be pressed by a hand.