WO2016208905A1

WO2016208905A1 - Pipe cutter

Info

Publication number: WO2016208905A1
Application number: PCT/KR2016/006373
Authority: WO
Inventors: 이영수
Original assignee: 이영수
Priority date: 2015-06-26
Filing date: 2016-06-15
Publication date: 2016-12-29
Also published as: DE212016000124U1

Abstract

The present invention relates to a manual pipe cutter for cutting a pipe while being rotated. In particular, the present invention allows a pipe cutter to rotate smoothly so as to prevent malfunction and facilitate the cutting work. The pipe cutter is provided with an auxiliary cutting blade so that a cutting blade can be immediately and easily substituted with the auxiliary cutting blade when the cutting blade wears out.

Description

Pipe cutting machine

The present invention relates to a manual pipe cutter for cutting a pipe pipe made of metal or synthetic resin while repeatedly rotating, and in particular, to prevent the failure by the smooth operation of the pipe cutter to cut the pipe pipe. To facilitate the cutting operation, and provided with an auxiliary cutting knife in the pipe cutter to be able to easily change the auxiliary cutting knife immediately when the cutting knife is worn.

In general, the pipe cutting machine used to cut the pipe pipe is divided into an automatic type that is automatically cut by a motor and a manual type that is cut by the operator by hand.

However, the automatic pipe cutting machine has the advantage of being able to easily cut the pipe by machine operation, while it is installed in a specific place and cannot be moved. This is a fairly expensive drawback.

Therefore, a small manual pipe cutter which is not only inexpensive to purchase but also easy to carry and can work on the job site is used.In order to use such a pipe cutter, a pipe is placed in a state where an operator bites precisely at a position to cut a pipe. The cutting machine is rotated and cut, and the cutting machine rotates the cutting machine several times depending on the thickness of the pipe.

To this end, the conventional manual pipe cutting machine has a guide arm on one side and a mounting arm protruding upward on the other end, and a support moved to the lifting shaft provided with a handle on the guide arm of the body is movable and mounted. The cutting arm is mounted on the mounting arm to rotate with the shaft pin, and rollers for easy rotation on the support shaft are fixed to the shaft pin, respectively, and the support moves according to the movement of the lifting shaft by the steering wheel operation. It is fixed by bite.

These cutting knives and rollers are axially fixed to the mounting arm and the support by the respective shaft pins, so that the pipe is cut by the cutting knife while being rotated while the pipe is bitten.

However, in order to fix the pipe pipe which is bitten by the pipe cutter, the support body is tightened so that a significant pressing force is generated on the roller and the cutting knife. When the cutter is rotated for cutting work in this state, the roller and the cutting knife are worn by frictional force. Is generated so that the rotation for cutting the pipe pipe is not made smoothly and the blade of the cutting knife becomes dull, not only the cutting operation is easy but also causes the failure.

In addition, when the pipe cutter is stored for a long time or not used, most of the supports are stored in close contact with the cutting knife. In this case, the cutting knife gradually dulls and damage to the cutting blade of the cutting knife occurs.

Therefore, in order to replace a cutting knife or a dull cutting knife that has been worn in the field, most auxiliary cutting knives are stored separately in a tool bag, and the inconvenience of having to find and remove the auxiliary cutting knives stored separately is a lot of work time. Of course, it takes a problem, as well as the replacement of the cutting knife when not carrying a tool bag was a problem.

Therefore, the present invention is to solve the conventional problems, the cutting knife and the roller mounted on the pipe cutter for cutting pipe pipes to smoothly rotate while minimizing the occurrence of wear, even in a pressurized state to fix the pipe pipes The purpose is to facilitate the cutting operation without causing any trouble. In addition, the cutting knife is always provided in the pipe cutter body so that the cutting knife can be easily replaced immediately when the cutting knife becomes dull or damaged.

The present invention as a technical idea for solving the above problems, by forming an oil supply passage for supplying the oil consisting of the inlet and outlet on each shaft pin for mounting the roller and the cutting knife is rotated to each shaft pin The oil is supplied between the roller and the cutting knife to rotate the roller and the cutting knife is rotated to minimize the wear caused by the friction by the oil when the rotation is smooth to facilitate the cutting operation.

In addition, in order to mount the shaft pin to form a knurled portion on one side of the shaft pin is mounted by force pinching or one side is formed with a tooth surface or formed a head portion made of a polygon and the other side is a groove frame to the coupling hole or the edge fixed to the coupling pin so as not to be separated By forming and fixing with a snap ring, the roller and the cutting knife can be easily assembled.

In addition, in the center of the roller to form a groove frame to cut the pipe in order to cut the pipe can be cut at the exact position without the flow of the cutter when rotating.

In addition, to form a mounting element on any portion of the body is equipped with a cutting knife to one side or both sides of the mounting element to detachably mount the auxiliary cutting knife by a fixing means.

The mounting element is formed by a threaded mounting groove or a through hole, and the fixing means is formed with a screw thread formed on one side of the head portion and the other side, so that the fixing element is penetrated through the shaft hole of the auxiliary cutting knife. Tighten or penetrated in the state in which the other side is tightened with nuts.

In addition, a stopper protruding more than the position of the cutting knife is formed directly below the mounting arm to which the cutting knife of the body is mounted, so that the roller formed on the support moves to the stopper so that the roller formed on the support stops against the cutting knife. To prevent damage to the blade.

Therefore, according to the pipe cutter of the present invention, even when the roller and the cutting knife pressurized by the pipe tube, the oil is supplied between the roller and the cutting knife mounted on the shaft pin, thereby minimizing the frictional force, thereby enabling smooth rotation operation for the cutting operation. The wear and tear of the roller and the cutting knife are not generated by the frictional force, and thus the failure can be caused for a long time.

In addition, when the cutting knife is damaged during storage or operation, the auxiliary cutting knife provided in the pipe cutter is replaced on the fly to provide a reduction in working time and ease of operation.

1 is a perspective view and an enlarged cross-sectional view showing an embodiment of a cutting machine of the present invention.

Figure 2 is an operation of the support is moved to secure the pipe of the present invention.

Figure 3 is a sectional view showing a state in which oil is supplied to the shaft pin of the present invention.

Figure 4 is a cross-sectional view showing an oil supply passage formed in the shaft pin of the present invention.

Figure 5 is a perspective view showing an embodiment in which the shaft pin of the present invention is coupled so as not to rotate.

Figure 6 is a perspective view showing a state coupled to the shaft pin not to be separated in the coupled state of the shaft pin of the present invention.

Figure 7 is a perspective view showing a state coupled to the snap ring not to be separated in the coupled state of the shaft pin of the present invention.

Figure 8 is a cross-sectional view that is operated so that the cutter is cut in position when cutting the pipe pipe of the present invention.

Figure 9 is a perspective view of the auxiliary cutting knife mounted to the pipe cutter of the present invention.

Figure 10 is a coupling view that the secondary cutting knife of the present invention is mounted.

Figure 11 is a cross-sectional view of the secondary cutting knife of the present invention.

Figure 12 is a coupling diagram showing another mounting element to which the secondary cutting knife of the present invention is mounted.

Figure 13 is a cross-sectional view of the secondary cutting knife mounted to another mounting element of the present invention.

14 is a coupling diagram in which the auxiliary cutting knife is mounted to both sides in the pipe cutter of the present invention.

Figure 15 is a cross-sectional view of the secondary cutting knife of the present invention mounted on both sides.

Figure 16 is a side view showing a stopper preventing wear of the cutting knife of the present invention.

The best form for the practice of the present invention is a body (10) formed with a mounting arm (12) on which a guide arm (11) is formed at one side and a cutting knife (50) is rotatably mounted with a shaft pin (30) at the other side; The support arm 20 is moved to the lifting shaft 21 provided with the handle 22 on the guide arm 11, and the support 20 corresponds to the cutting knife 50 mounted on the body 10. A pair of rollers 40 are positioned at the position to be rotatably mounted with the shaft pins 30 so that the pipe tube 60 is pressed between the rollers 40 and the cutting knife 50 by the movement of the support 20. In the pipe cutting machine for cutting the pipe pipe 60 to rotate the cutter in a fixed state,

The shaft pin 30 forms an oil supply passage 31 through which oil is supplied, so that an oil outlet hole is formed at a portion of the shaft pin where the roller is located, and an oil inlet is formed at a portion where the roller of the shaft pin is not located. When the oil is injected into the inlet, the oil is discharged into the oil outlet formed at the part where the roller is located through the oil supply passage 31, thereby facilitating the rotation of the roller, thereby preventing the breakdown and facilitating the cutting work while damaging the cutting knife. Pipe cutter with auxiliary cutting knife for time change.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 4, the configuration of the pipe cutter according to the present invention includes a guide arm 11 formed at one end thereof and a cutting knife 50 having a shaft hole 51 formed at the other end thereof rotated by the shaft pin 30. The support body 20 is moved to the lifting shaft 21 provided with the handle 22 on the body 10 and the guide arm 11 formed on the body 10 and the mounting arm 12 to be mounted. And the rollers 40 are positioned up and down in a position corresponding to the cutting knife 50 mounted on the body 10 and rotatably mounted with the shaft pins 30, respectively, on the support 20. The oil is supplied between the combined roller 40 and the cutting knife 50 coupled to the shaft pin 30 through 30 to smoothly operate the rotation.

At this time, the guide arm 11 is moved through the lifting shaft 21 on which the support 20 is mounted so that a thread is formed on the inner circumferential surface, and an engagement screw thread is formed on the surface of the lifting shaft 21 to operate the handle. As the lifting shaft 21 is moved from the guide arm 11 to tighten, the support 20 is moved so that the pipe pipe 60 is not moved.

In addition, the guide arm 11 and the mounting arm 12 formed on the body 10 are protruded upwards to form a space for cutting the pipe pipe 60 therebetween and the support 20 is moved from the guide arm 11 The guide bar 14 is formed on the body 10 to allow the stable movement of the guide 10, and the guide groove 23 guided to the guide bar 14 is formed on the support 20.

In addition, the lower end of the body 10 is a handle 13 is formed to facilitate the installation for moving the cutting machine or cutting of the pipe pipe 60.

At this time, the shaft pin 30 is formed even in the pressurized state so that the pipe pipe 60 is formed by forming an oil supply passageway 31 so as to supply oil between the roller 40 and the cutting knife 50 combined. The oil is smoothly rotated for the cutting operation of the pipe 60, so that no wear occurs.

In addition, the oil supply passage 31 is formed with an injection hole 31a for injecting oil into one side of the shaft pin 30, and a passage 31b for moving the oil injected into the shaft pin 30. And the discharge port 31c is discharged to the middle portion of the shaft pin 30 so that the oil moved to the passage 31b can be supplied between the roller 40 and the cutting knife 50 coupled thereto.

Therefore, the roller 40 and the cutting knife 50 coupled to each shaft pin 30 can be easily supplied from the outside without separating the oil, thereby facilitating use.

At this time, the groove 40 is formed in the center of the roller 40 supporting the pipe 60, and when the cutter is rotated for cutting the pipe 60, the pipe 60 is cut by the cutting knife 50. Cutting powder generated at the cutting part is accumulated in the groove frame 41 formed in the roller 40, so that the cutter is rotated at the correct position without flowing in the cut portion of the pipe pipe 60.

That is, while the roller 40 is in close contact with the surface of the pipe pipe 60, the cutter is repeatedly rotated several times while the cutting knife 50 is cutting the cutting portion of the pipe pipe (60) When the surface is in contact with the surface of the pipe 40 and the pipe 60, the cutting machine does not have an uneven surface due to the cutting powder during rotation. will be.

At this time, the shaft pin 30 for axially coupling the roller 40 and the cutting knife 50 to be coupled to the mounting arm 12 formed in the body 10 and the mounting hole 24 formed in the support 20 so as not to rotate. One side of the shaft pin 30 is made of a knurled portion (30a) is mounted so as not to be separated by a forced pinch by punching or formed a head portion 32 formed of a polygonal surface or polygonal to the shaft pin (30) and the body 10 The mounting arm 12 formed on the support body 20 and the mounting hole 24 formed on the support 20 are formed to correspond to the head portion 32 of the shaft pin 30 so that the shaft pin 30 is not rotated in a coupled state. will be.

In addition, the other side of the shaft pin 30, the coupling groove 33 and the coupling groove rim 34 is formed at the same time, respectively formed on the rim surface formed with the coupling hole 33 or the shaft pin 30 is not separated in the coupled state It is to be able to simply assemble by fixing the coupling pin 35 to the coupling hole 33 or by using a snap ring 36 to the coupling groove 34.

Meanwhile, at one side of the body 10 on which the cutting knife 50 is mounted, a mounting element 16 for mounting the auxiliary cutting knife 50a is formed to fix one side or both sides of the mounting element 16. 60) to be detachably mounted.

Therefore, when the blade of the cutting knife 50 becomes dull or damaged due to abrasion, the auxiliary cutting knife 50a mounted on the body 10 can be promptly completed by replacing the auxiliary cutting knife 50a.

At this time, the mounting element 16 is formed in one side or both sides of the body 10, the inner wall is formed of a mounting groove (16a) formed by a screw thread to additionally install the auxiliary cutting knife (50a) one or two additional parts It is to be done.

The fixing means 60 is pin-shaped, one side is formed of the head portion 61 and the other side is formed of the engaging screw thread 62 to the end shaft hole (51) formed on the auxiliary cutting knife (50a) By penetrating through) to fix to the mounting element 16 of the body 10 and to replace the auxiliary cutting knife (50a) is to be able to simply detach by releasing the fixing means (60).

The head portion 61 of the fixing means 60 is formed in a polygonal shape to facilitate the tightening or to form a coupling groove in which a tool such as a driver is coupled to the upper surface to facilitate the tightening operation.

12 shows another embodiment of the mounting element 13 for mounting the auxiliary cutting knife 50a. The mounting element 16 is formed as a through hole 16b having no thread formed therein. The fixing means 60 is penetrated by the ball 16b so that the other end formed with the engagement screw thread 62 is fixed with the nut 63 in the state where it is exposed to the opposite surface of the body 10.

In this case, the auxiliary cutting knife (50a) will be able to simply be mounted as one fixing means 60 in a state located on one side or both sides of the body (10).

On the other hand, the roller 40 is formed on the support 20 while the support 20 is lifted by the lifting shaft 21 directly below the mounting arm 12 on which the cutting knife 50 is mounted cutting knife 50 It is to form a stopper 17 to prevent close contact with.

Since the stopper 17 is formed to protrude more than the position where the cutting knife 50 is formed, the support 20 is mounted on the support 20 even when the support 20 is moved to the end by the lifting shaft 21 by the operation of the handle 22. The roller 40 is caught by the stopper 17 so as not to be in close contact with the cutting knife 50 so as to prevent damage to the blade.

Claims

A guide arm 11 is formed at one side, and a handle 10 is formed at the body 10 and the guide arm 11 having a mounting arm 12 on which the cutting knife 50 is rotatably mounted by the shaft pin 30. The support 20 is moved to the lifting shaft 21 is provided with a pair of rollers 40 in a position corresponding to the cutting knife 50 mounted on the body 10 is mounted on the support (20) Is positioned and rotatably mounted to the shaft pin 30 and the cutter is rotated while the pipe tube 60 is fixed by pressure between the roller 40 and the cutting knife 50 by the movement of the support 20. In a pipe cutter for cutting 60,

The shaft pin 30 forms an oil supply passage 31 through which oil is supplied, so that an oil outlet hole is formed at a portion of the shaft pin where the roller is located, and an oil inlet is formed at a portion where the roller of the shaft pin is not located. When the oil is injected into the inlet, the oil is discharged into the oil outlet formed at the part where the roller is located through the oil supply passage 31, thereby facilitating the rotation of the roller, thereby preventing the breakdown and facilitating the cutting work while damaging the cutting knife. Pipe cutter with an auxiliary cutting knife for time change.
The method of claim 1,

In the center of the roller 40 fitted to the shaft pin is characterized in that the groove frame 41 is formed to be cut at the correct position without flow in the cut portion of the pipe pipe 60 when rotated for the cutting operation of the pipe pipe 60 Pipe cutter with auxiliary cutting knife for replacement in case of damage of cutting knife to make cutting work easier without breakdown.
The method according to claim 1 or 2,

The shaft pin 30 is formed by knurled portion 30a on one side to be mounted by force pinching by punching, so that a failure does not occur and the cutting operation is facilitated while the auxiliary cutting knife for replacement when the cutting knife is damaged. Equipped pipe cutter.
The method of claim 1,

The shaft pin 30 has a chamfered portion formed on one side or a head portion 31 is formed in a polygonal, the other side is formed with a coupling groove rim 34 on the edge formed with the coupling hole 33 and the coupling hole 33 The shaft pin 30 is fixed to any one of the coupling pin 35 or the snap ring 36 so as not to be separated in the coupled state, so that the assembly is easy. Pipe cutter with an auxiliary cutting knife for time change.
The method of claim 1,

Forming the mounting element 16 for mounting the auxiliary cutting knife (50a) to any one side of the body 10, and the auxiliary cutting knife (50a) to one side or both sides of the body 10, the mounting element 16 is formed ) Can be detachably mounted from the mounting element 16 by the fixing means 60 through the shaft hole 51 formed in the auxiliary cutting knife 50a in a state where the cutting operation is performed. This is a pipe cutter with an auxiliary cutting knife for replacement when the cutting knife is damaged.
The method of claim 5,

The mounting element 16 is formed of a threaded mounting groove 16a, and the fixing means 60 is formed at one side of the head portion 61 and the other end of the engagement screw thread 62 to form a tightening fixing. Pipe cutter equipped with an auxiliary cutting knife for replacement in case of damage to the cutting knife while making it easy to cut the work without a breakdown.
The method of claim 5,

The mounting element 16 is formed of a through hole 16b, and the fixing means 60 is formed at one side of the head portion 61 and the other end by engaging thread 62 to mount the auxiliary cutting knife 50a. When the cutting knife is damaged while the cutting means 60 is formed so as to penetrate and fix the fixing means 60 in the left and right sides to be fastened and fixed to the engagement screw thread 62 by the nut 63. Pipe cutter with auxiliary cutting knife for exchange.
The method according to any one of claims 1 to 5,

Immediately below the mounting arm 12 to which the cutting knife 50 is mounted, the stopper 17 is formed to protrude more than the position where the cutting knife 50 is formed to move from the lifting shaft 21 by operating the handle 22. The roller 40 mounted on the support 20 is formed to be stuck to the stopper 17 to be in close contact with the cutting knife 50 so as not to be damaged. Pipe cutter with auxiliary cutting knife for replacement in case of damage.