JP3011380U - Pipe cutting machine - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a pipe cutting machine, and an object thereof is to realize a pipe cutting machine that can easily align a planned cutting position of a workpiece with a cutting position of a metal saw. [Structure] A frame 10 and a workpiece 1 attached to a horizontal rotary shaft provided in a head portion 11 of the frame 10
A chuck 12 that bites 8, a metal saw 15 that cuts a workpiece 18 bitten by the chuck 12, and a metal saw 15 that supports the metal saw 15 and can swing at a position away from the central axis of the metal saw 15. In a pipe cutting machine including a metal saw support arm 14 that is axially supported, a cutting position index plate 16 is provided on the frame 10 in accordance with a position where the metal saw 15 cuts the machined object 18. To configure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe cutting machine. Specifically, the present invention relates to a portable pipe cutting machine that uses a metal saw to cut a workpiece such as a pipe or a bar while rotating the workpiece.

Conventionally, for gas pipes and water pipes, plastic-lined steel pipes whose inner or outer circumferences are lined with a plastic such as polyethylene are often used for the purpose of anticorrosion. A roller blade type cutter is generally used for cutting such a plastic-lined steel pipe, but there is a drawback that so-called "burr" of the plastic is likely to occur on the cut surface and a clean cut surface cannot be obtained. For this reason, pipe cutting machines using metal saws that do not cause "burrs" are currently used.

[0003]

[Prior art]

 FIG. 5 is a view showing a conventional portable pipe cutting machine. This has a chuck 2 rotatably driven by a motor (not shown) attached to a head portion 1a of a frame 1 by a horizontal shaft. The chuck 2 and the horizontal shaft have a hollow central portion so that a workpiece 3 such as a pipe can be inserted from the rear side to the front side and can be bitten by a claw 2a provided on the chuck 2. .

A metal saw support arm 4 whose one end is swingably supported by a horizontally-supported support shaft (not shown) is provided on the front side portion of the frame 1, and the metal saw support arm 4 is attached to the metal saw support arm 4. Is provided with a metal saw 5. The metal saw 5 is rotatably driven by a motor provided in the drive unit 6 of the metal saw support arm. Reference numeral 7 in the figure denotes a thread cutting head supported by two guide shafts 8.

When the workpiece 3 is cut by this pipe cutting machine, a mark 9 is attached to a desired cutting position of the workpiece 3 with a felt-tip pen or the like as shown in FIG. Is rotated to bring the metal saw 5 closer to the workpiece 3, and while fixing the workpiece 3 to the chuck 2 while aligning the metal saw 5 and the mark 9, the chuck 2 and the metal saw 5 are rotated to move the metal saw. 5 is pressed against the work material 3 and cut.

[0006]

[Problems to be solved by the device]

 In the conventional pipe cutting machine described above, when aligning the cutting position mark 9 of the work piece 3 and the metal saw 5, the operator supports the metal saw support arm 4 with one hand and, at the same time, with the other hand. Since the position of the processed material 3 must be adjusted, there is a problem that it is difficult to perform accurate positioning with one-handed operation.

In view of the above conventional problems, an object of the present invention is to realize a pipe cutting machine that can easily perform cutting position alignment of a workpiece.

[0008]

[Means for Solving the Problems]

 In the pipe cutting machine of the present invention, a frame, a chuck mounted on a horizontal rotary shaft provided in a head portion of the frame for biting a workpiece, and a workpiece cut by the chuck are cut. In the pipe cutting machine, a metal saw supporting the metal saw and a metal saw supporting arm pivotally supported at a position apart from the central axis of the metal saw are swingable. An index plate for cutting position alignment is provided on the frame according to the position to be cut.

[0009]

[Action]

 In the present invention, as shown in FIG. 2, a pipe cutting machine that cuts a workpiece with a metal saw while rotating the workpiece is provided with an index plate at a position corresponding to the cutting position of the metal saw, so that the required workpiece can be processed. The cutting position can be aligned with the index plate, and the alignment can be performed extremely easily as compared with the conventional method of aligning with the metal saw.

[0010]

【Example】

 FIG. 1 is a perspective view showing an embodiment of the present invention. In this embodiment, as shown in the figure, a hollow horizontal shaft (not shown) is provided on the head portion 11 of the frame 10, a chuck 12 is attached to the horizontal shaft, and further provided on the side portion of the front portion of the frame. A metal saw support arm 14 is swingably supported by a horizontal support shaft 13, and a metal saw 15 is provided at the other end of the metal saw support arm 14. The metal saw 15 and the chuck 12 are provided with a single common motor or Each of them is driven to rotate by a separate motor.

Although the above is almost the same as the conventional example described in FIG. 5, the feature of the present embodiment is that the cutting position is on the side opposite to the head portion 11 of the frame 10 and facing the metal saw 15. That is, the indicator plate 16 for indicating is provided. The index plate 16 has a substantially semicircular cutout 17 that surrounds the work piece 17, and the cutout 17 must have a size such that the work piece having the maximum workable diameter does not come into contact with the work piece 17. Further, it is preferable that the indicating plate 16 has substantially the same thickness as the metal saw 15.

The present embodiment configured as described above is used as shown in FIGS. In the usage shown in FIGS. 2 and 3, a mark 19 is attached to a required cutting position of the workpiece 18, the mark 19 is aligned with the indicator plate 16 and the chuck 12 bites the chuck 12, Cutting is performed by rotating the metal saw 15 and pressing the metal saw 15 against the workpiece 17 as shown in FIG.

Further, in the usage shown in FIG. 4, when fixing the workpiece 18 to the chuck 12, the scale 20 is abutted against the index plate 16 as shown in the figure so that the workpiece 18 having a required length can be obtained. The tip of the processed material 18 is aligned with the scale of the scale 20 and then fixed to the chuck 12. After that, the workpiece 18 and the metal saw 15 are rotated, and the metal saw 15 is pressed against the workpiece 18 and cut.

According to the method of use described with reference to FIGS. 2 to 4 above, the planned cutting position of the workpiece 18 can be aligned with the index plate 16 while the metal saw 15 is retracted. Matching is extremely easy.

[0015]

[Effect of device]

 According to the present invention, it is possible to realize a pipe cutting machine that can extremely easily position the cutting position of a workpiece by providing an index plate that indicates the cutting position.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of an embodiment of the present invention.

FIG. 2 is a view for explaining how to use the embodiment of the present invention.

FIG. 3 is a view for explaining how to use the embodiment of the present invention.

FIG. 4 is a view for explaining another method of using the embodiment of the present invention.

FIG. 5 is a view showing a conventional portable pipe cutting machine.

[Explanation of symbols]

 10 ... Frame 11 ... Head 12 ... Chuck 13 ... Spindle 14 ... Metal saw support arm 15 ... Metal saw 16 ... Index plate 18 ... Workpiece material 19 ... Mark 20 ... Scale

Claims (1)

[Scope of utility model registration request] 1. A frame, a chuck that is attached to a horizontal rotation shaft provided in a head portion of the frame and holds a workpiece, and a metal saw that cuts the workpiece held by the chuck. A pipe cutting machine, comprising: a metal saw supporting arm that supports the metal saw and that is pivotally supported at a position away from a central axis of the metal saw, in accordance with a position where the metal saw cuts a workpiece. A pipe cutting machine characterized in that an index plate for cutting position alignment is provided on the frame.