JPH01234154A - Pipe cutter - Google Patents

Abstract

PURPOSE:To cut a thin pipe simply and safely by rotating the pipe at least at a certain time during cutting the pipe with a rotary edge. CONSTITUTION:A rod 12 is lowered by operating a handle 15, and a motor 7 and a small-sized motor 18 are driven to rotate a rotary edge 6 and an elastic roller 16. The rod 12 is further lowered, and an arm 9 is pushed by a shaft 19, whereby the rotary edge 6 is moved to the pipe 1 side to start cutting a thin pipe 1. The rod 12 is pushed with the progress of such cutting, so that the roller 16 is moved to the pipe 1 side and brought into contact with the pipe 1. While the thin pipe 1 supported at three points by rollers 2a, 2b, 3a of support tables 2, 3 is rotated by the above contact, the pipe is cut by the rotary cutting edge 6 smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pipe cutting machine for cutting thin-walled pipes used as transport pipes for flour and the like.

(Prior art) In a wheat flour mill, a diameter of 150 to 200 m5 and a wall thickness of 0.8 to 2.0 m are used to transport flour. .

Thin-walled metal pipes of grade I are used.

This pipe is cut to an appropriate length and then joined together using a handshake to form a transport route.

A pipe cutting machine is used to cut this thin-walled pipe, and this type of equipment is equipped with a rotary blade (a disc-shaped grindstone) that rotates at high speed, and the pipe is attached to the fixed part of the equipment on both sides. After securing it in a vise, place a rotary blade against the pipe and cut it.

However, even with this cutting machine, it is difficult to cut the pipe in one go, because the pipe is thin, and if more than half of the pipe is cut, it becomes difficult to hold the pipe, and the rotary blade does not cut the pipe. This is because it may be pinched from both sides depending on the location where it was touched.

Therefore, when cutting a pipe using this type of cutting machine, after cutting the pipe for a certain amount of time, loosen the vise on the fixed part to surround the pipe, move the cut part, and tighten the vise again. This process is repeated two to three times. Therefore, the pipe cutting operation is quite troublesome, and it is not desirable from a safety standpoint to reset the vibrator two or three times in front of a rotating blade that rotates at high speed.

(Object and Structure of the Invention) The present invention has been made in view of the above points, and an object of the present invention is to make it possible to easily and safely cut a thin-walled pipe. The pipe is rotatably supported by the rotary blade, and the pipe is cut while being rotated at least for a period of time while the pipe is being cut by the rotary blade.

(Example) The present invention will be explained below based on the drawings.

FIG. 1 is a side view showing an embodiment of a pipe cutting machine according to the present invention, and FIG. 2 is a front view thereof.

In the figure, 1 is the pipe to be cut, and 2.3 is a support stand that supports the pipe 1. The support base 2 is fixedly attached to the pedestal 4, and the support base 3 is slidably attached to the pedestal 4. Rollers 2a, 2b, and 3a are rotatably provided at locations where the support base 2.3 contacts the pipe 1, and the pipe 1 is supported at three points by these rollers. If the diameter of the pipe l is different, the support stand 3 is moved and adjusted, and then the nut 5 is tightened to fix the support stand 3. As shown in FIG. 2, a plurality of these support stands 2.3 are installed at intervals in the longitudinal direction of the pipe l.

The rotary blade 6 is attached to a rotating shaft 8 of a motor 7, and the motor 7 is attached to an arm 9.

The arm 9 is rotatably attached to a shaft lO provided on the pedestal 4, and is biased by a spring 11 in a direction in which the rotary blade 6 is retracted.

The rod 12 is rotatably attached to a support shaft 14 of a column 13 erected on the pedestal 4, and has a handle 15 formed at its tip. A balance weight 16 whose attachment position is adjustable is provided at the other end of the rod 12. The handle 15 side of the rod 12 is made of rubber (or other elastic material).
A roller 16 is provided, and the roller 16 is rotated by a small motor 18 installed on the rod 12 via a belt 17 (the belt 17 and the small motor 18 are omitted in FIG. 2). may be driven by a motor built into the roller instead of using a belt, or may be driven by a belt from outside the device. part is locked. That is, an elongated hole 9a is formed at the tip of the arm 9, and this elongated hole 9a engages with the shaft 19. Rod 12
When pushed down in the direction of the arrow in FIG.
While sliding, the arm 9 is pushed down counterclockwise against the spring 11, and the rotary blade 16 moves toward the pipe l side.

Next, the operation will be explained.

First, the pipe l is placed on the rollers 2a and 2b of the support stand 2, and the support stand 3 is slid so that the pipe l is placed on the rollers 2a and 2b
, 3a so that it is supported at three points. In this state, the pipe 1 is rotatably supported on the support base 2.3 without wobbling.

Next, when the operator grips the handle 15 and lowers the rod 12, the motor 7 and the small motor 18 are driven, and the blade 6 and roller 16 rotate once. When the rod 12 is lowered further, the arm 9 is pushed by the shaft 19, and the rotary blade moves to the first position.
As shown by the chain line A in the figure, it moves to the pipe I side, and cutting of the pipe I is started. When the rod 12 is lowered further, the roller 16 moves toward the pipe 1 as shown by the m line B in FIG.
, and the pipe 1 begins to rotate. At this time, roller 1
6 is attached so as to be in contact with the pipe 1 almost directly above the pipe 1. Since the pipe l is cut while rotating, it is cut smoothly.

When cutting is completed, the rod 12 is raised and returned to its original position, thereby stopping the motor 7 and the small motor 18.

The balance weight 16 is used to balance the vertical movement of the rod 12, and by appropriately adjusting its position, for example, when the rod 12 is raised, it remains in the raised position, and when lowered, it remains in the lowered position. It can be made to stay in place.

As described above, by using the pipe cutting machine according to the present invention, pipes can be easily cut, and safety is improved without the need to reset pipes many times as in the past. Furthermore, by using the cutting machine shown in the example, it is possible to easily cut pipes of different diameters, and since the contact position between the rotary blade and the pipe is always the same, the location where chips are generated changes. Dust collection can be done easily and efficiently.

In the above embodiment, the pipe 1 is rotated by the rollers 16 after the pipe 1 has been cut to a certain extent, but the timing at which the rollers 16 start rotating is not particularly limited. The timing at which the rollers 16 come into contact with the pipe 1 can be easily determined by the diameter of the rollers 16, the length of the rod 12, etc., but it is possible to keep the pipe rotating. Good too.

(Effects of the Invention) As explained above, the present invention is configured such that a pipe is rotatably supported on a pipe support, and the pipe is rotated and cut at least for a period of time while the pipe is being cut by a rotary blade. So thin-walled pipes can be cut easily and safely.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of a pipe cutting machine according to the present invention, and FIG. 2 is a front view thereof. l...Pipe, 2.3-...Support stand, 6...Rotary blade, 16-...Roller

Claims (1)

[Claims] A pipe support body that rotatably supports a pipe, a rotating member that rotates the pipe, and a rotary blade that cuts the pipe, and rotates the pipe at least for a period of time while the rotary blade is cutting the pipe. A pipe cutting machine characterized by being configured as follows.