JP2666067B2 - Pipe cutting machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pipe cutting machine for cutting a thin pipe used as a transport pipe for flour or the like.

(Prior Art) In a wheat mill, thin metal pipes having a diameter of 150 to 200 mm and a wall thickness of about 0.8 to 2.0 mm are used for transporting flour. This pipe is cut at an appropriate length and joined by a joint or the like to form a transport path.

A pipe cutting machine is used to cut this thin-walled pipe. This type of equipment is equipped with a rotating blade (thin disk-shaped whetstone) that rotates at high speed. After fixing it with a vice, cut it with a rotating blade against the pipe. However, it is difficult to cut a pipe at one time using this cutting machine. This is because the thin wall of the pipe makes it difficult to hold the pipe when it is cut in half or more, and the rotary blade is pinched from both sides by the cut portion of the pipe.

Therefore, when cutting a pipe with this type of cutting machine, after cutting the pipe to a certain extent, loosen the vice of the fixed part and turn the pipe, move the cutting part and tighten it again with a vice. The operation of hitting the rotary blade is repeated two or three times. Therefore, the work of cutting the pipe is considerably troublesome, and it is not preferable from the viewpoint of safety to reset the pipe a few times before the rotating blade rotating at a high speed.

(Objects and Configurations of the Invention) The present invention has been made in view of the above points, and has as its object to enable simple and safe cutting of thin-walled pipes. The pipe is rotated so that the pipe rotating member acts on the pipe in conjunction with the movement of the rotary blade during the cutting of the pipe.

(Example) Hereinafter, the present invention will be described with reference to 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, reference numeral 1 denotes a pipe to be cut, and reference numerals 2 and 3 denote support stands for supporting the pipe 1. The support 2 is fixedly mounted on a gantry 4, and the support 3 is slidably mounted on the gantry 4. Rollers 2a, 2b, 3a are rotatably provided at positions where the supports 2 and 3 contact the pipe 1.
The pipe 1 is supported at three points by these rollers. If the diameter of the pipe 1 is different, the support 3 is moved and adjusted, and then the nut 5 is tightened to fix the support 3. As shown in FIG. 2, a plurality of sets of the support bases 2 and 3 are provided at intervals in the longitudinal direction of the pipe 1.

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 10 provided on the gantry 4, and is urged 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 gantry 4, and a handle 15 is formed at the tip thereof. At the other end of the rod 12, a balance weight 20 whose mounting position can be adjusted is provided. A roller 16 made of rubber (or another elastic material) is provided on the handle 15 side of the rod 12, and the roller 16 is rotated by a small motor 18 installed on the rod 12 via a belt 17 (second motor). The figure shows a belt
17 and the small motor 18 are omitted). The roller 16 may be driven by a motor built in the roller instead of the belt, or may be driven by a belt from outside the apparatus. An arm 9 is provided on a shaft 19 provided substantially at the center of the rod 12.
Are locked. That is, a long hole 9 a is formed at the tip of the arm 9, and the long hole 9 a is engaged with the shaft 19. When the rod 12 is pushed down in the direction of the arrow in FIG. 1, the shaft 19 slides down the elongated hole 9a and pushes down the arm 9 in a counterclockwise direction against the spring 11, and the rotary blade 6 moves toward the pipe 1.

 Next, the operation will be described.

First, the pipe 1 is brought into contact with the rollers 2a and 2b of the support 2 and the support 3 is slid, so that the pipe 1 is fixed to the rollers 2a, 2b and 3a.
Secure so that it is supported by points. In this state, the pipe 1 is rotatably supported on the supports 2 and 3 without rattling.

Next, when the operator grasps the handle 15 and lowers the rod, the motor 7 and the small motor 18 are driven, and the rotary blade 6 and the roller 16 rotate. When the rod 12 is further lowered, the shaft
The arm 9 is pushed by 19, and the rotary blade is
Move to the pipe 1 side as shown by, and the cutting of the pipe 1 is started. When the rod 12 is further lowered, the roller 16
Comes into contact with the pipe 1 as shown by a chain line B in FIG. 1, and the pipe 1 starts rotating. At this time, the roller 16 is mounted almost directly above the pipe 1 so as to be in contact with the pipe 1.
Since the pipe 1 is cut while rotating, it is cut smoothly.

When the cutting is completed, the rod 12 is raised and returned to the original position. Thereby, the motor 7 and the small motor 18 are stopped.

The balance weight 20 is for balancing the vertical movement of the rod 12, and by appropriately adjusting its position,
For example, when the rod 12 is raised, it can stay at the raised position, and when it is lowered, it can stay at the lowered position.

As described above, by using the pipe cutting machine according to the present invention, it is possible to easily cut the pipe, and it is not necessary to reset the pipe many times as in the related art, thereby improving the safety. Furthermore, if the cutting machine shown in the embodiment is used, even if the pipe diameter is different, it can be similarly easily cut, and since the position where the rotary blade and the pipe hit is always constant, the place where the chips are generated changes. In addition, dust can be collected easily and efficiently.

In the above embodiment, the timing at which the roller 16 comes into contact with the pipe 1 can be easily determined by the diameter of the roller 16, the length of the rod 12, or the like, but may be configured to be adjustable.

(Effect of the Invention) As described above, the present invention rotatably supports a pipe on a pipe support, and causes a pipe rotating member to act on the pipe in conjunction with the movement of the rotating blade during cutting of the pipe by the rotating blade. Since the pipe is configured to rotate, the thin pipe can be cut easily and safely.

[Brief description of the drawings]

FIG. 1 is a side view of one embodiment of a pipe cutting machine according to the present invention, and FIG. 2 is a front view thereof. 1 ... pipe, 2,3 ... support, 6 ... rotary blade, 16 ...
roller

Claims (1)

(57) [Claims] A pipe supporting member for rotatably supporting a pipe, a pipe rotating member for applying a driving force to the pipe to rotate the pipe, and a rotary blade for cutting the pipe; After being rotatably supported by a support, the pipe rotating member is made to act on the pipe in conjunction with the movement of the rotary blade during pipe cutting, thereby rotating the pipe. And pipe cutting machine.