JP6872783B2 - Pipe cutting device - Google Patents

Description

The present invention relates to a pipe cutting device capable of cutting a plurality of pipes at the same time.

If a plurality of pipes are cut by one device, the work efficiency can be improved, and the configuration and installation space of the device can be omitted. Further, Patent Document 1 (Japanese Unexamined Patent Publication No. 2016-518995) discloses a pipe cutting device technique for simultaneously tightening and fixing a plurality of types of pipes having different diameters in order to cut a plurality of types of pipes at the same time.

Japanese Unexamined Patent Publication No. 2016-518995

For example, as a kind of pipe cutting device, there is a so-called tension type pipe cutting device that cuts a pipe while applying a tensile force to the pipe. However, in a tension type pipe cutting device, there are the following problems in cutting a plurality of types of pipes at the same time. That is, from the viewpoint of device configuration and omission of installation space, it is desirable to operate the cutting mechanism and the tensioning mechanism by a single drive source. However, when trying to cut different types of pipes with different diameters and wall thicknesses, some pipes are cut first due to the difference in diameter and wall thickness, and the tensile force due to the tension mechanism is applied only to the remaining pipes. Become. Then, the balance between the cutting speed by the cutting mechanism and the tensile force by the tensioning mechanism is lost, and the cutting surface may be defective or the blade may be spilled in the cutting mechanism. However, Patent Document 1 does not disclose a technique for simultaneously cutting a plurality of types of pipes by solving such a problem in a tension type pipe cutting device.

Therefore, in a tension type pipe cutting device, it is desired to realize a pipe cutting device suitable for cutting a plurality of types of pipes at the same time.

The pipe cutting device according to the present invention is
A pipe cutting device that can cut multiple pipes at the same time.
A fixing mechanism for fixing one end side of the plurality of pipes,
A tension mechanism that applies a tensile force in the longitudinal direction to the plurality of pipes by grasping the plurality of pipes fixed by the fixing mechanism and pulling them toward the other end side.
A cutting mechanism, which is arranged between the fixing mechanism and the tensioning mechanism and can be driven by a single driving unit to cut the plurality of pipes at the same time, is provided.
The tension mechanism includes a plurality of gripping portions that separately grip the plurality of pipes.
Each grip has an independent drive mechanism and can apply a tensile force to the corresponding pipe independently of the other grips.

According to this configuration, the cutting mechanism is operated by a single drive source, and the tensile force by the tension mechanism is applied separately for each pipe, so that the configuration and installation space of the device are omitted. It is possible to solve the above-mentioned problems that a defect in the cut surface and a blade spill in the cutting mechanism occur when some of the pipes are cut first.

In one embodiment, the fixing mechanism is immovable along the longitudinal direction, the cutting mechanism is movable along the longitudinal direction, and the tensioning mechanism side is interlocked with the tensioning mechanism. It is preferable to move to.

That is, in the case of so-called one-sided pulling in which the pipe is pulled only by the tension mechanism, a load is applied to the cutter blade from the fixing mechanism side, which may cause a defective cutting surface or a blade spill in the cutting mechanism. According to the above, since the cutting mechanism is moved to the tension mechanism side in conjunction with the tension mechanism, the load applied to the cutter blade from the fixing mechanism side is effectively relaxed, and such a defect is less likely to occur.

In one embodiment, it is preferable that the cutting mechanism is connected to the fixing mechanism via a spring member.

According to this configuration, the cutting mechanism automatically returns to the initial position when the drive mechanism in each grip portion is not driven.

Perspective view of pipe cutting device Perspective view showing a slide machine of a cutting mechanism and a tensioning mechanism

An embodiment of the pipe cutting device according to the present invention will be described with reference to the drawings. FIG. 1 shows a pipe cutting device 1 according to the present embodiment, in which the pipe cutting device 1 includes a feed mechanism 2 for supplying a pipe, a fixing mechanism 3 for fixing the pipe, and a cutting for cutting the pipe. A mechanism 4 and a tension mechanism 5 for applying a tensile force to the pipe are provided. The pipe cutting device 1 according to the present embodiment is a device capable of cutting a plurality of pipes at the same time, and has a configuration particularly suitable for cutting a plurality of types of pipes having different diameters and wall thicknesses at the same time. Hereinafter, the configuration of each part will be described.

The feeding mechanism 2 feeds a plurality of pipes (two in this embodiment) to the pipe cutting device 1. Specifically, in the present embodiment, the feed mechanism 2 includes a plurality of feed clamps 21 that separately grip each pipe, and each feed clamp 21 uses the upper and lower clamp members 21a and 21b with clamp cylinders 21c. It is possible to grip and release the pipe by moving it closer to or further from each other. The plurality of feed clamps 21 can move back and forth along the longitudinal direction L of the pipes by a common drive source (not shown), and the feed clamps 21 move back and forth at the same time to simultaneously determine a plurality of pipes. It is possible to feed the pipe cutting device 1 by the length. The feed clamp 21 grips the pipe so that the position of the central axis of the pipe is the same regardless of the type of the pipe (the same applies to the fixed clamp 31 and the tension clamp 51 described later).

The fixing mechanism 3 fixes one end side of a plurality of pipes fed by the feeding mechanism 2. Specifically, in the present embodiment, the fixing mechanism 3 includes a plurality of fixed clamps 31 that separately grip each pipe, and each fixed clamp 31 has upper and lower clamp members 31a like the feed clamp 21. , 31b can be gripped and released from the pipe by moving them closer to or further from each other by the clamp cylinder 31c. The fixing mechanism 3 fixes the plurality of pipes by gripping the plurality of pipes fed by the feeding mechanism 2 by the fixing clamps 31. The fixing mechanism 3 is immovable along the longitudinal direction L.

The cutting mechanism 4 is arranged between the fixing mechanism 3 and the tension mechanism 5, and can be driven by a single driving unit 42 to cut a plurality of pipes at the same time. Specifically, in the present embodiment, the cutting mechanism 4 has a plurality of cutter heads 41 that insert pipes into the inside and cut the pipes by a cutter provided at the tip, and a drive common to the plurality of cutter heads 41. A portion 42 and a slide board 43 that can move along the longitudinal direction L are provided. When the pipe is cut, the cutter head 41 is rotated by the drive of the drive unit 42, and the cutter provided at the tip of each cutter head 41 gradually moves toward the axis of the pipe. That is, the pipe is cut by bringing the cutter that revolves around the pipe into contact with the pipe. Further, as the slide board 43 slides, each cutter head 41 and the drive unit 42 can be translated in the longitudinal direction.

The tension mechanism 5 applies a tensile force in the longitudinal direction L to the plurality of pipes by grasping the plurality of pipes fixed by the fixing mechanism 3 and pulling them toward the other end side. Specifically, in the present embodiment, the tension mechanism 5 includes a plurality of tension clamps (corresponding to a plurality of grip portions) 51 that separately grip a plurality of pipes. Similar to the feed clamp 21, each tension clamp 51 can grip and release the pipe by moving the upper and lower clamp members 51a and 51b closer to each other and away from each other by the clamp cylinder 51c. ..

In the present embodiment, the plurality of tension clamps 51 each have an independent drive mechanism (slide plate 52 and tension cylinder 53). Specifically, each tension clamp 51 is provided on a slide plate 52 that can move along the longitudinal direction L, and each tension clamp 51 is driven by a tension cylinder 53 connected to the slide plate 52. Together with the slide board 52, it moves to the other end side of each pipe along the longitudinal direction L. That is, by driving each tensioning cylinder 53, each tensioning clamp 51 moves in the longitudinal direction L independently of the other tensioning clamps 51, and applies a tensile force to the corresponding pipe independently of the other tensioning clamps 51. It can be granted.

Further, in the present embodiment, the cutting mechanism 4 and the tensioning mechanism 5 are connected by a link mechanism 6, and the cutting mechanism 4 moves to the tensioning mechanism 5 side in conjunction with the tensioning mechanism 5. Specifically, in the link mechanism 6, a plurality of second link portions 62 provided on the slide plate 43 of the cutting mechanism 4 are separately provided on the first link portion 61 provided on each slide plate 52 of the tension mechanism 5. It is connected. Then, the slide plate 52 moves to the other end side of each pipe along the longitudinal direction L by driving the tension cylinder 53, so that the slide plate 43, that is, the cutting mechanism 4 is interlocked with the tension mechanism 5 and the tension mechanism 5 is used. It is designed to move to the side.

Further, the slide board 43 is connected to the fixing mechanism 3 via two tension springs (corresponding to spring members) 7. As a result, when the tension cylinder 53 is no longer driven, the slide plate 43, that is, the cutting mechanism 4, is pulled toward the fixing mechanism 3 by the urging force of the tension spring 7 and returns to a predetermined position. Further, as the cutting mechanism 4 returns to the initial position, the tension mechanism 5 connected to the cutting mechanism 4 by the link mechanism 6 also returns to the initial position.

Next, a step of cutting a plurality of pipes at the same time using the pipe cutting device 1 will be described. First, a plurality of types of pipes are fed to the pipe cutting device 1 by a predetermined length by the feeding mechanism 2. Then, the pipe is gripped by each of the fixing clamps 31 of the fixing mechanism 3 and each of the tension clamps 51 of the tension mechanism 5. After that, the tensioning cylinder 53 of the tensioning mechanism 5 starts driving, and each cutter head 41 of the cutting mechanism 4 starts rotating, and each pipe by each cutter head 41 in a state where a tensile force is applied to each pipe. The disconnection starts. In this case, when only the tension mechanism 5 moves, a load is applied to the cutter blade from the fixing mechanism 3 side by the pipe, which may cause a defective cutting surface or a blade spill in the cutting mechanism. Then, since the cutting mechanism 4 is moved to the tension mechanism 5 side in conjunction with the tension mechanism 5, the load applied to the cutter blade from the fixing mechanism 3 side is relaxed, and such a problem is less likely to occur. When the cutting of all the pipes is completed, the rotation of the cutter head 41 and the drive of the tensioning cylinder 53 are stopped, and the cutting mechanism 4 and the tensioning mechanism 5 are pulled toward the fixing mechanism 3 by the urging force of the tension spring 7. And return to the specified position.

When the tension mechanism 5 is driven by a single drive source, when trying to cut different types of pipes having different diameters and wall thicknesses, some pipes are cut first due to the difference in diameter and wall thickness. Then, the tensile force of the tension mechanism 5 is applied only to the remaining pipes. Then, the balance between the cutting speed by the cutting mechanism and the tensile force by the tensioning mechanism is lost, and the cutting surface may be defective or the blade may be spilled in the cutting mechanism. On the other hand, according to the pipe cutting device 1 according to the present embodiment, since the tensile force by the tension mechanism 5 is applied to each pipe separately, when cutting a plurality of types of pipes having different diameters and wall thicknesses. However, it is possible to solve the above-mentioned problems that a defect in the cut surface and a blade spill in the cutting mechanism occur when some of the pipes are cut first. Further, since the cutting mechanism 4 is operated by a single drive source, the configuration of the device and the installation space can be omitted.

[Other Embodiments]
Finally, other embodiments of the pipe cutting device according to the present invention will be described. The configurations disclosed in each of the following embodiments can be applied in combination with the configurations disclosed in other embodiments as long as there is no contradiction.

(1) In the above-described embodiment, the pipe cutting device 1 capable of cutting two pipes at the same time has been described as an example. However, the embodiment of the present invention is not limited to this, and may be capable of cutting three or more pipes at the same time.

(2) In the above-described embodiment, the configuration in which the cutting mechanism 4 and the tensioning mechanism 5 are connected by the link mechanism 6 and the cutting mechanism 4 moves to the tensioning mechanism 5 side in conjunction with the tensioning mechanism 5 has been described as an example. However, the embodiment of the present invention is not limited to this, the cutting mechanism 4 does not have to move to the tension mechanism 5 side in conjunction with the tension mechanism 5, and the cutting mechanism 4 and the tension mechanism 5 are linked. The cutting mechanism 4 may move to the tension mechanism 5 side in conjunction with the tension mechanism 5 by a configuration other than being connected by 6. Further, the cutting mechanism 4 does not have to be connected to the fixing mechanism 3 via the tension spring 7. In addition, the fixing mechanism 3 may be movable along the longitudinal direction L and may also serve as a tensioning means, so as a so-called double-pull type device.

(3) With respect to other configurations, it should be understood that the embodiments disclosed herein are exemplary in all respects and the scope of the invention is not limited thereto. Those skilled in the art will be able to easily understand that modifications can be made as appropriate without departing from the spirit of the present invention. Therefore, another embodiment modified without departing from the spirit of the present invention is naturally included in the scope of the present invention.

The present invention can be used, for example, for cutting pipes.

1 Pipe cutting device 3 Fixing mechanism 4 Cutting mechanism 42 Single drive unit 5 Pulling mechanism 51 Multiple gripping parts 52 Slide board (drive mechanism)
53 Tension cylinder (drive mechanism)
7 Spring member

Claims (3)

A pipe cutting device that can cut multiple pipes with different diameters and wall thicknesses at the same time.
A fixing mechanism for fixing one end side of the plurality of pipes,
A tension mechanism that applies a tensile force in the longitudinal direction to the plurality of pipes by grasping the plurality of pipes fixed by the fixing mechanism and pulling them toward the other end side.
A cutting mechanism, which is arranged between the fixing mechanism and the tensioning mechanism and can be driven by a single driving unit to cut the plurality of pipes at the same time, is provided.
The tension mechanism includes a plurality of gripping portions that separately grip the plurality of pipes.
A pipe cutting device in which each grip portion has an independent drive mechanism and can apply a tensile force to the corresponding pipe independently of the other grip portions. The fixing mechanism is immovable along the longitudinal direction and is immovable.
The pipe cutting device according to claim 1, wherein the cutting mechanism is movable along the longitudinal direction and moves to the tension mechanism side in conjunction with the tension mechanism. The pipe cutting device according to claim 2, wherein the cutting mechanism is connected to the fixing mechanism via a spring member.

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