JPH05329709A - Scraper for large bore diameter resin pipe - Google Patents

Abstract

PURPOSE:To provide a scraper to simply and quickly peel off the surface of a large bore diameter resin pipe. CONSTITUTION:The thick wall of the bevel of a resin pipe A is held between a capstan roller 3 and a roller 10, and the surface B is peeled off with a blade as the capstan roller 3 is driven by a motor to revolve a main body 1, and moreover a driving screw 18 is rotated by a handle to bring a feed screw 19 into action for moving a blade holder along a capstan 2, and the surface is therefore spirally peeled off by the above moving and revolving actions. Since the scraper is revolved along the outer periphery of the resin pipe A by motor- driving, a peeling work is easy and effective in the case of a large bore diameter pipe, and its surface is finely and spirally peeled off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scraper for peeling the surface of a large diameter resin pipe.

[0002]

2. Description of the Related Art It is necessary to thinly peel off the surface of a resin pipe when piping the resin pipe or attaching valves or instruments to the resin pipe. As this scraper (cutter) for peeling, the one disclosed in Japanese Utility Model Publication No. 2-10590 is known.

[0003]

However, the above-mentioned known scraper is effective for a small-diameter pipe, but for example, when the pipe has a large-diameter pipe having a diameter of 30 cm or more, the pipe makes one round and the cut line is clean. It is inconvenient to remove it.

An object of the present invention is to provide a scraper which is easy and convenient to use, especially when it is applied to a large diameter resin pipe.

[0005]

The structure of the scraper according to the present invention is as follows.

A capstan with a capstan roller attached to the scraper body was attached horizontally, and a free-running roller was attached below the capstan in parallel with the capstan and with adjustable spacing. A roller shaft is arranged, a drive shaft for driving the capstan is provided coaxially with the capstan, and a drive gear is attached to the drive shaft so as to freely rotate, and the drive shaft is parallel to the capstan. A drive screw with a feed screw from the tip side to the middle was attached to the main body, and a feed gear was attached to this drive screw to mesh with the drive gear, and it was screwed into the feed screw of the drive screw with a screw hole. , Attach the blade and step to the capstan The blade holder is mounted at a right angle to the capstan by engaging it from above with a leaf spring on the upper surface, and a support that holds the leaf spring of the blade holder from above from parallel to the capstan. A scraper for large diameter resin pipes, which has a shaft attached to the main body.

[0007]

[Function] At the groove of the target resin pipe, the wall thickness is sandwiched between the capstan and the roller shaft, and the roller shaft is pushed up to strongly press the capstan roller against the surface of the resin pipe. To do. Next, when the drive shaft is driven by connecting the rotary shaft of the hand motor to the drive shaft, the capstan is driven together with this, and the capstan roller rotates. When the capstan roller rotates, the body revolves around the circumference of the tube, and the blade that cuts into the surface makes a cut in the surface. Then, when the drive gear is manually rotated after the pipe has rotated once, this rotation is transmitted to the drive screw via the feed gear, and the feed screw rotates. When the feed screw rotates, the blade holder meshing with the screw hole is fed, and the blade holder moves in the pipe axis direction (the groove direction) along the drive screw and the capstan. This action causes the blade to make a spiral cut in the surface. When the blade holder comes off the feed screw, the movement stops and the surface peeling ends. The cut amount of the blade is determined by the pressing amount of the leaf spring by the support shaft.

[0008]

EXAMPLE 1 1 is a scraper body, and a capstan 2 having capstan rollers 3 having protrusions on its surface is attached horizontally to the body 1 and the capstan 2 is attached to the capstan 2. The drive shaft 4 is coaxially connected. Reference numeral 5 is a drive gear that is fitted onto the drive shaft 4 so as to freely rotate, and 6 is a motor connecting portion formed at the tip of the drive shaft 4. Reference numeral 7 denotes a left and right support arm attached to the main body 1 by a ring shaft 8 so that the front end side is vertically movable, and two rollers 10 are freely rotatable between the front ends of the support arm 7. The attached roller shaft 9 is rotatably attached by a holder 11. 11 'is a holder shaft. It should be noted that the roller shaft 9 is parallel to the capstan 2 in the upper and lower directions, and is provided with an interval that allows the wall thickness of the tube to freely enter, and has a generally U-shaped appearance when viewed from the side.

Reference numeral 12 indicates a threaded portion 1 in a screw hole 13 of the main body 1.
4 is a knob for adjusting the distance between the capstan 2 and the roller shaft 9 by screwing the tip 4 into contact with the contact portion 16 of the support arm 7. 17 is a roller holder, 1
8 is a drive screw with a feed screw 19 rotatably attached to the main body 1 so as to be parallel to the capstan 2, and a feed gear 20 fixed to the drive screw 18 is attached to the drive gear 5. It is in mesh. The feed screw 19 is cut off in the middle, and a coil spring 21 is externally mounted on the tip of the feed screw 19.

A blade holder 22 is engaged with the capstan 2 from above via a step portion 24 with a screw hole 23 screwed into the feed screw 19 of the drive screw 18 as a fulcrum, and 25 is A leaf spring attached to the upper surface of the blade holder 22 is used.
Are pressed from above by a support shaft 26 mounted on the capstan 2 so as to be parallel to the main body 1.

Reference numeral 27 is a blade attached to the blade holder 22, and the orientation of the blade 27 is perpendicular to the capstan 2 (pipe axis direction). 28
Is a blade pressing screw, and 29 is a handle attached to the drive gear 5.

FIG. 5 shows an example of work performed using the scraper described above. When the groove thickness of the resin pipe A is inserted between the capstan 2 and the roller shaft 9 and the knob 12 is tightened, the support arm 8 rings. It rotates clockwise about the shaft 8 (FIG. 1), and as a result, the roller shaft 9 is horizontally pressed against the inner surface of the resin pipe A by the rotating action about the holder shaft 11 '. By this action, the capstan roller 3 of the capstan 2 bites into the surface B and the frictional force is increased. At the same time, the blade 27 bites into the surface B. After the scraper is set on the resin pipe A in this way, the rotary shaft of the hand motor (not shown) is fitted to the motor connecting portion 7 of the capstan 2 and the capstan 2 is driven. The main body 1 revolves around the outer periphery of the resin pipe A while traveling along the outer peripheral surface B of the resin pipe A. By this action, the blade 27 peels the surface B along the periphery.
After rotating once, with the capstan 2 still driven,
When the handle 29 is rotated little by little and the drive gear 5 is rotated, the feed gear 20 meshed with this is rotated and the drive screw 18 is rotated. As a result,
The blade holder 22 moves to the right (FIG. 1) by the action of the feed screw 19 and the screw hole 23 of the blade holder 22, and the blade 27 moves to the surface due to the revolution of the main body 1 and the movement action of the blade holder 22 (blade 27). B is spirally peeled. FIG. 6 shows the state of peeling in this spiral shape, C
Is the capstan indentation. After being peeled off in a spiral shape, the blade holder 22 is disengaged from the feed screw 23 and further movement is stopped. The coil spring 28 is the blade holder 2
2 is pushed back to the side of the feed screw 23, so the handle 2
When 9 is rotated in the reverse direction, the feed screw 19 and the screw hole 23 are engaged again, and it is possible to return to the original position by reverse feeding again.

[0013]

The effects of the present invention are as follows.

A. By sandwiching the groove thickness of the resin pipe between the capstan roller and the roller, and rotating the capstan roller with a hand motor, the resin pipe can be made to go around while peeling the surface with a blade.

Therefore, the peeling operation can be easily and quickly performed on a large-diameter pipe.

B. By rotating the drive gear with the handle and transmitting this rotation with the feed gear → drive screw (feed screw), the blade holder (blade) is moved along the tube axis, and the surface is rotated by the revolution of the body. Can be peeled in a spiral shape.

C. By attaching a leaf spring to the blade holder and pressing the leaf spring with the support shaft, it is possible to surely separate the blade while adjusting the biting amount of the blade.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a scraper according to the present invention.

FIG. 2 is a plan view showing a capstan and a drive screw portion.

FIG. 3 is a front view of the scraper seen from the tip side.

FIG. 4 is a front view of the scraper as seen from the front side.

FIG. 5 is a perspective view showing a state in which a scraper is attached to a resin pipe.

FIG. 6 is a perspective view showing a state where the surface is spirally peeled off.

[Explanation of symbols]

 1 main body 2 capstan 3 capstan roller 4 drive shaft 5 drive gear 6 support arm 9 roller shaft 10 roller 18 drive screw 19 feed screw 20 feed gear 22 blade gear 25 leaf spring 26 support shaft 27 blade A resin pipe B surface

Claims (1)

[Claims] 1. A capstan having a capstan roller attached to the scraper main body is horizontally attached, and below the capstan, the capstan roller is parallel to the capstan and the distance between the capstan roller and the idler roller is adjustable. The mounted roller shaft is arranged, a drive shaft for driving the capstan is provided coaxially with the capstan, and a drive gear is attached to the drive shaft so as to freely rotate, and the drive shaft is parallel to the capstan. The drive screw, which has a feed screw from the tip side to the middle, was attached to the main body, and a feed gear was attached to the drive screw to engage with the drive gear. And attach the blade to the capstan Provided with a blade holder that engages from above at a step, mounts a leaf spring on the upper surface, and is arranged at a right angle to the capstan, presses the leaf spring of the blade holder from above from parallel to the capstan. A scraper for large diameter resin pipes, which has a support shaft attached to the main body.