CN115884859A

CN115884859A - Pipe cutting device

Info

Publication number: CN115884859A
Application number: CN202080102942.4A
Authority: CN
Inventors: 萩原康史
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2023-03-31
Also published as: WO2022102111A1

Abstract

The disclosed device is provided with: a rotating plate which is driven by a motor to rotate, wherein the central area is hollow, and a notch is arranged from the outer periphery to the hollow part; a fixed plate which is arranged adjacent to the rotating plate and has a notch from the outer periphery to the hollow part of the rotating plate; and a pipe support part which has a concave part for supporting the pipe so that the length direction of the pipe is vertical to the cutting blade, and is switched from off to on by a switch, and rotates the rotating plate for one circle to perform one cutting.

Description

Pipe cutting device

Technical Field

The present invention relates to a pipe cutting device for cutting a pipe which is mainly used for protecting an electric wire used for a wire harness for a vehicle.

Background

Conventionally, a pipe used as an exterior protective material for an electric wire or the like constituting a wire harness is cut by using a pipe cutting jig because the pipe needs to be cut at a predetermined position corresponding to a wire material to be protected.

For example, patent document 1 describes a pipe cutting jig for cutting a pipe at a predetermined position corresponding to a wire rod. The pipe cutting jig described in patent document 1 includes a body portion to which a cutting blade is attached and a lever portion attached to be swingable with respect to the body portion, and describes a jig for cutting a pipe by rotating the lever while being grasped by an operator and a jig for cutting a pipe by sliding a cutting blade while being pressed by the operator.

Patent document 2 describes a jig used for similar purposes, although the object to be cut is not a pipe. In the cable cutting jig for cutting a cable described in patent document 2, the cable is held in a predetermined direction on a main body, a cutting position thereof is set, and a force several times as large as an operating force is applied to the cable from a cutting blade by a lever of a cutting lever by swinging the cutting lever with respect to the main body and the cable, thereby cutting the cable.

Prior art documents:

patent documents:

patent document 1 Japanese patent laid-open No. 2017-123903

Patent document 2 Japanese patent laid-open No. 2002-370120

Patent document 3 Japanese patent laid-open No. Hei 9-155627

Disclosure of Invention

The problems to be solved by the invention are as follows:

in the conventional pipe cutting method, an operator grips a rod portion of a pipe cutting jig and rotates the rod to cut a pipe, or the operator presses a cutting blade of the pipe cutting jig with a hand and slides the cutting blade to cut the pipe.

In the cutting device described in patent document 3, a device for cutting a material to be cut such as a pipe by rotating a cutting blade by driving an electric motor or the like is described, but as shown in fig. 3 of patent document 3, a rod of the cutting device is grasped, a first frame member and a second frame member are opened against the elastic force of a coil spring, and a first rotating member and a second rotating member of a cutting rotating means are opened, and the material to be cut is inserted into the blade to be cut while maintaining the openings of the frame member and the rotating members, and this device is complicated in structure and has a problem in workability. In addition, since the operations of holding the lever and opening the frame are manual operations by the operator, there is a problem that the operator is fatigued.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a pipe cutting device driven by an electric motor, which has a simple structure and can appropriately cut a pipe at a predetermined position corresponding to a wire material to be protected.

The scheme for solving the problems is as follows:

a pipe cutting device for cutting a pipe at a predetermined position, comprising: a rotating plate having a hollow rotating central region driven by a motor and having a notch from an outer peripheral edge to the hollow portion; a fixed plate which is arranged adjacent to the rotating plate and has a notch from the outer periphery to the position where the tube is supported by the hollow part of the rotating plate; a cutting blade, the blade part of which is fixed on the rotating plate at an angle vertical to the rotating shaft; and a tube support part having a concave part for supporting the tube so that the length direction of the tube is perpendicular to the cutting blade; the rotary plate is rotated once to perform one-time cutting by switching the switch from off to on, and the pipe is held over the entire circumference by the inner surface of the cylindrical portion of the rotary plate and the pipe support portion when the pipe is cut.

The tube cutting device includes a switch, and is switched from off to on when the presence of a tube on the tube support portion is detected.

The invention has the following effects:

according to the present invention, it is possible to provide a pipe cutting device capable of easily cutting a pipe by driving an electric motor at a predetermined position corresponding to a wire material to be protected with a simple device configuration.

Drawings

FIG. 1 is a perspective view of the pipe cutting apparatus of the present invention;

fig. 2 is a perspective view of the pipe cutting apparatus as viewed from a direction different from that of fig. 1;

FIG. 3 is a schematic view of the pipe cutting apparatus as viewed from a direction different from that of FIG. 1;

FIG. 4 (a) is a schematic view showing a state before an operation of cutting a pipe with a cutting blade;

FIG. 4 (b) is a schematic view showing an operation of cutting the pipe by the cutting blade;

fig. 4 (c) is a schematic view showing the operation of returning the cutting blade to the position before the operation;

fig. 5 is a schematic view showing a range in which the blade part of the cutting blade moves in the hollow part of the rotating plate;

fig. 6 is a schematic view of a tube cutting device having a switch on a tube support portion;

fig. 7 is a schematic view of a pipe cutting device having a handle portion connected to a fixed plate and a switch on the handle portion.

Detailed Description

The rotating mechanism is used for rotating and moving a cutting blade 2 for cutting a pipe 1 in a plane orthogonal to the pipe length direction, and comprises: a fixed plate 4 and a rotating plate 3, wherein a rotating central region of the rotating plate 3 disposed adjacent to the fixed plate 4 is hollow, and the rotating plate 3 is rotationally driven by an electric motor 7.

The cutting blade 2 is a thin plate-like tool such as a blade of a commercially available cutter, and the blade portion of the cutting blade 2 is fixed to the rotary plate 3 at an angle perpendicular to the rotation axis.

The rotating plate 3 has a cutout for inserting and extracting the pipe 1 in a hollow portion from an outer peripheral edge to a central region. Further, in the fixed plate 4 disposed adjacent to the rotating plate 3, a notch for inserting and extracting a tube is provided in the moving region 9 of the cutting edge portion of the hollow portion of the rotating plate from the outer peripheral edge, and the tube 1 is inserted and extracted into the region 9 where the edge portion of the cutting edge of the hollow portion of the rotating plate 3 moves in a state where the notch of the fixed plate 4 and the notch of the rotating plate 3 are aligned. The cutting blade 2 is fixed to the rotating plate 3 at a position that does not interfere with the insertion and removal of the tube when the tube 1 is inserted and removed with the notch of the fixed plate 4 aligned with the notch of the rotating plate 3.

The tube support portion 5 is provided so that the longitudinal direction of the tube is perpendicular to the cutting edge 2 when the tube is supported. The tube support part 5 has a U-shaped recess for supporting the tube 1 in the moving region 9 of the cutting blade part in the hollow part of the rotating plate so that the tube axis is parallel to the rotation center axis of the rotating plate 3. The tube support portion 5 is provided to support the tube 1 at a position close to the rotationally movable surface of the cutting blade 2 when the cutting blade 2 presses and cuts the tube 1.

The apparatus has a switch for starting the turning-off and a control means for controlling the driving of the rotating plate 3 by rotating the rotating plate once and stopping the rotating plate by turning the switch from off to on.

Examples

The operation of the pipe cutting apparatus of the present invention will be described with reference to fig. 1 and 2.

In the tube cutting device shown in fig. 1, which is provided at the tube cutting position, the tube 1 held by the hand of the operator or the device is inserted from the outer peripheral edge into the moving region 9 of the cutting blade portion in the hollow portion of the rotating plate in a state where the notch of the fixed plate 4 and the notch of the rotating plate 3 are aligned, the tube is held by the tube support portion 5 so that the longitudinal direction of the tube is perpendicular to the cutting blade 2, and the position where the tube 1 is cut becomes the rotational moving surface of the cutting blade 2.

As shown in fig. 2, when the switch is pressed and turned from off to on, the rotary plate 3 is driven by the driving force of the electric motor 7 via the belt 6 shown in fig. 2 and 3, and the rotary plate 3 is rotated once and stopped. By rotating the rotating plate 3 once, the tube 1 is cut by the cutting blade 2 provided in the rotating plate 3, and the tube is moved back to the position before the start of rotation and stopped.

As described above, the tube 1 is inserted from the outer peripheral edge of the fixed plate into the moving region 9 of the cutting blade portion in the hollow portion of the rotating plate, held by the tube support portion 5, and the switch is turned from off to on, and the rotating plate provided with the cutting blade 2 is rotated once to cut the tube once.

The tube cutting operation described with reference to fig. 4. Fig. 4 (a) shows a state of the cutting blade before the tube cutting operation. The tube 1 is held on the tube support portion 5 in a state where the cut-outs of the fixed plate 4 and the rotary plate 3 are aligned.

Fig. 4 (b) shows an operation of cutting the tube with the cutting blade. When the switch is turned on from off, the rotating plate 3 rotates in the rotating direction 8, and the tube 1 is cut off. At this time, by rotating the cutting blade 2 provided on the rotating plate 3 and obliquely pressing and cutting the tube 1 supported by the tube supporting portion 5 with the cutting blade 2, the tube can be cut with a smaller force than in the conventional method in which the tube is pressed and cut with the cutting blade sliding. Further, by holding the pipe 1 over the entire circumference by the inner surface of the cylindrical portion of the rotating plate 3 and the pipe support portion 5, the pipe can be prevented from being cut obliquely, and a good cut surface can be maintained, and the dimensional accuracy of the cut length can be improved.

Fig. 4 (c) shows the operation of returning the cutting blade to the position before the cutting operation is started. The cutting blade 2 that has cut the pipe 1 moves as the rotating plate 3 rotates in the direction of rotation 11, and stops moving to a position before the rotation starts as shown in fig. 4 (a). At this time, the cutting blade 2 can return to the position before the start of cutting from the tube cutting without changing the rotation direction and stopping. That is, the rotating plate 3 stops after rotating once, and the operation of returning the pipe cutting movement to the position before the cutting operation starts is completed. Thus, the electric motor can be driven by a simple mechanism to cut the pipe, as compared with a case where the pipe is cut by sliding the conventional cutting blade by manual operation of the operator.

Fig. 5 shows a moving region 9 of the cutting edge portion in the hollow portion of the rotating plate 3. The movement region 9 of the cutting edge portion of the hollow portion of the rotating plate 3 is a circular region having a radius of the shortest length from the rotation center of the rotating plate 3 to the cutting edge portion removed from the hollow portion region of the rotating plate 3. The cutting blade 2 is provided on the rotating plate so as to press-cut the tube obliquely while rotating, and a range in which the cutting blade does not move may occur in a central region including the rotation center axis of the rotating plate. Therefore, the tube support portion 5 is provided to support the tube 1 in the moving region 9 of the cutting blade portion in the hollow portion of the rotating plate 3 shown in fig. 5.

Fig. 6 is a schematic diagram of a tube cutting device having a switch that changes from off to on by being pressed by a tube when the tube is held by the tube holding portion. By providing a switch in the tube support portion that is turned on when the presence of a tube is detected, the tube can be cut only by inserting the tube into the tube support portion. The switch is not limited as long as it can detect the presence of the tube. For example, a proximity switch, a photoelectric switch, or the like may be used.

Fig. 7 is a schematic view of a pipe cutting device including a handle connected to a fixed plate and a switch that can be pressed by a finger of an operator while holding the handle. The device shown in the schematic view is a tube cutting device in which a grip portion is held by hand, the device is moved to a tube cutting position where a tube is stretched in a lateral direction, the tube is inserted into a tube supporting portion from a notch portion of the device, and a switch is pressed to cut the tube at a predetermined position.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. The material, shape, size, arrangement position, and the like of each component in the above embodiment are not limited as long as the present invention can be achieved.

The driving force may be transmitted by a transmission belt, as long as the rotating plate can be rotationally driven and stopped. For example, by using a plurality of gears.

The shape of the tube support portion is not limited to the U-shape, and is not limited as long as the present invention can be realized. For example, square or flat.

In addition, the pipe to be cut is not limited to a pipe shape having a uniform thickness, and even a pipe having a branched shape or a complicated shape may be used as long as the cut portion has a shape that can be cut in the present invention. For example, it may be used to cut off a gasket end portion or the like used for waterproofing or dust-proofing of a wire harness.

Description of reference numerals:

1 tube

2 cutting edge

3 rotating plate

4 fixing plate

5 pipe support

6 driving belt

7 Motor

8 direction of rotation

9 moving area of cutting edge of hollow part of rotating plate

10 switch

Claims

1. A pipe cutting device for cutting a pipe at a predetermined position, comprising:

a rotating plate having a hollow rotating central region driven by a motor and having a notch from an outer peripheral edge to the hollow portion;

a fixed plate which is arranged adjacent to the rotating plate and has a notch from the outer periphery to a position where the pipe is supported by the hollow portion of the rotating plate;

a cutting blade, the blade part of which is fixed on the rotating plate at an angle vertical to the rotating shaft; and

a tube support part having a concave part for supporting the tube so that the length direction of the tube is vertical to the cutting blade;

the rotary plate is rotated once to perform one-time cutting by turning on or off the switch, and the pipe is held over the entire circumference by the inner surface of the cylindrical portion of the rotary plate and the pipe support portion when the rotary plate is cut off.

2. The pipe cutting device according to claim 1, wherein a switch is provided to change from off to on when the presence of the pipe on the pipe support portion is detected.