JPS5932490Y2 - pipe cutter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a pipe cutter for cutting thin-walled pipes such as stainless steel pipes for water piping.

In a conventional pipe cutter, a guide frame is provided with a roller housing with a roller, and a cutter housing is provided that can move forward and backward with respect to the roller housing, and the pipe is inserted between the cutter wheel attached to the cutter housing and the roller. The cutter wheel is held in place and either the guide frame or the pipe is rotated to cut the pipe using an annular cutting blade formed on the circumferential surface of the cutter wheel, and it is used to cut hard thin-walled pipes such as stainless steel pipes. In some cases, it has the disadvantage of poor sharpness.

The present invention was completed with the aim of providing a pipe cutter that eliminates the above-mentioned drawbacks and can simultaneously form an insertion position mark for a connecting joint at a position slightly inward from the cut end surface during cutting, and is as follows: The illustrated embodiment will be described in detail.

Reference numeral 1 denotes a guide frame, and a cutter housing 3 on the fixed side provided between guide rods 2, 2 of the guide frame 1 requires cutter wheels 5, 5 having annular cutting blades 4, 4 on the circumferential surface. It is rotatably provided at intervals of .

Reference numeral 6 denotes a movable cutter housing whose both end portions are slidably guided by the guide rods 2, 2 so as to face the cutter housing 3, and an annular cutting blade 7 is provided in the center of the cutter housing 6. A cutter wheel 9 is rotatably mounted on one side of the cutter wheel 9 and has a plurality of annular low protuberances 8 for forming an insertion position mark lower than the cutting blade 7 on the other side. The housing 6 is connected to a push screw 12 with an operating handle 11 screwed into a connecting member 10 at one end of the guide frame 1, and is moved forward and backward by rotation of the operating handle 11.

In this structure, the guide frame is attached to the reciprocating table of the pipe threading machine, and the pipe buoy held in the holding device of the pipe threading machine is attached to the cutter wheel rotatably provided in the cutter housing 3 on the fixed side. 5, 5 and a cutter wheel 9 rotatably provided on the cutter housing 6 on the movable side, and the pie buoy is rotated via the holding device, or the pie buoy is held in a pipe vise (not shown) and the pie buoy is Similar cutter wheels 5, 5 and cutter wheels 9
If the guide frame 1 is held between them and rotated, the cutting blades 4 of the rotating cutter wheels 5, 5 and the cutting blade 7 of the cutter wheel 9 will bite into the area to be cut, and the pie buoy will cut into the hard material. Even if the material is thin, it can be easily cut. Since a low protrusion 8 for forming an insertion position mark that is slightly lower than the cutting blade 7 is provided with a required spacing between the cutting blade 7 and the cutting blade 7, the pipe buoy created by the cutting blades 4, 4 and the cutting blade 7 is Following cutting, this low raised portion 8 forms a linear shallow insertion position mark for the connecting joint at a position slightly inward from the cut end surface of the pipe buoy, which is indispensable for piping work using conventional stainless steel pipes. The work of forming an insertion position mark on the connecting joint after cutting, which was previously considered necessary, can be omitted.

Moreover, since the insertion position marker formed by the low raised portion 8 is always at a constant position from the cutting end surface and has a constant depth, there is no risk of dimensional errors and the cutting blade is Since it is only necessary to form the low raised portion 8 on one of the three cutter wheels formed, there is an advantage that mass production can be carried out at low cost.

In the illustrated embodiment, a plurality of low protrusions 8 are provided in a ring shape on the cutter wheel 9 provided on the cutter housing 6 on the movable side, but the number may be one, and it is also necessary to form a ring shape. However, one of the cutter wheels 5, 5 may be provided as an elongated cutter wheel.

Therefore, the present invention is an inexpensive method that can accurately and easily cut hard thin-walled pipes, and at the same time forms a mark for the position of pushing into the connecting joint at a certain distance inward from the cut end surface at the same time as cutting. It has great practical value as a pipe cutter.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, and FIG. 2 is a partially cutaway plan view of the main part. 1 Guide frame, 3: Fixed side cutter housing, 4: Cutting blade, 5: Cutter wheel, 6: Movable side cutter housing, 7: Cutting blade, 8: Low protrusion for forming insertion position mark, 9 : Cutter wheel.

Claims (1)

[Scope of utility model registration request] The guide frame is provided with a fixed side cutter housing and a movable side cutter housing that can move forward and backward with respect to the cutter housing, and a cutter wheel rotatably attached to the double-sided blade housing is provided with an annular cutting blade. 1. A pipe cutter, characterized in that a low protuberance for forming an insertion position mark lower than the cutting blade is provided on a surface of each cutter wheel.