JP2012187696A - Cutting tool, and cutting device equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting tool capable of changing its amplitude according to materials and the thickness of a cutting object.SOLUTION: The cutting tool includes a housing, an electric motor, a cutting blade, a slider attached with the cutting blade, an operation mechanism connected to the electric motor and reciprocatably supporting the slider. The operation mechanism is configured so that the reciprocating distance of the reciprocating movement of the slider can be varied.

Description

  The present invention relates to a cutting tool and a cutting device provided with the cutting tool.

  As a device for cutting a cardboard or a resin molded body into a predetermined shape, a cutting device called a so-called sample cutter is widely used. Such a cutting apparatus typically includes an automatic drafting machine, an electronic controller that controls the automatic drafting machine, and a cutting blade that reciprocally attaches to the pen mounting head of the automatic drafting machine in a replaceable manner. And a mounting table on which the object to be cut is mounted (see, for example, Patent Document 1). However, such a cutting device has to replace the cutting blade in accordance with the material and thickness of the object to be cut, which is very inconvenient and has poor processing efficiency. Specifically, according to such a cutting device, the cutting blade must be replaced every time the cutting object changes, and even if it is a single cutting object, the thickness and material differ depending on the portion. In some cases, the cutting blade must be replaced.

JP-A-10-119149

  The present invention has been made to solve such problems, and an object of the present invention is to provide a cutting tool capable of changing the amplitude in accordance with the material and thickness of the object to be cut. .

The cutting tool of the present invention comprises a housing, an electric motor, a cutting blade, a slider to which the cutting blade is attached, and an operation mechanism that is connected to the electric motor and supports the slider so as to be able to reciprocate. The mechanism is configured to be able to vary the reciprocating distance of the reciprocating motion of the slider.
In a preferred embodiment, the operating mechanism is a crank mechanism, and the crank mechanism is rotated according to the rotation of the electric motor; and is attached eccentrically to the crank disk and integrated with the crank disk. A crank pin that is rotated; and a relay member that converts the rotational motion of the crank pin into a reciprocating motion and transmits the reciprocating motion to the slider, and the crank pin is attached to be movable in the radial direction of the crank disk. .
In a preferred embodiment, the operation mechanism is a link mechanism, and the link mechanism includes a link that defines a predetermined angle with respect to the rotation axis of the electric motor and moves circularly around the rotation axis of the electric motor; The reciprocating motion conversion mechanism has a rotating body whose center moves circularly in conjunction with the circular motion of the link, and a relay member that converts the circular motion of the rotating body into reciprocating motion and transmits the reciprocating motion to the slider. The rotating body is mounted so as to be movable relative to the link, and the slider moves when the rotating body moves in the link and the radius of circular motion at the center of the rotating body changes. The reciprocating distance of the reciprocating motion is changed.
According to another aspect of the present invention, a cutting device is provided. This cutting apparatus is provided with the above cutting tool, a mounting part that can be exchanged and mounted in a two-dimensional direction, a control unit that controls movement of the mounting part, and an object to be cut. A mounting table.

  According to the cutting tool of the present invention, since the reciprocating distance of the reciprocating motion of the cutting blade can be changed, it can be used without exchanging the cutting blade even if the thickness or material of the cutting object changes.

It is a schematic sectional drawing showing one operation state of the cutting tool by preferable embodiment of this invention. It is a schematic sectional drawing showing another operation state of the cutting tool of FIG. 1A. FIG. 6 is a schematic cross-sectional view illustrating one operating state of a cutting tool according to another preferred embodiment of the present invention. It is a schematic sectional drawing showing another operation state of the cutting tool of FIG. 2A. It is the schematic explaining the rotary body attached to the link of a link mechanism in the cutting tool shown to FIG. 2A and 2B. It is a schematic sectional drawing which shows another example of the connection form of the electric motor and link mechanism in the cutting tool shown to FIG. 2A and FIG. 2B. 1 is a schematic perspective view of a cutting device according to a preferred embodiment of the present invention.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to these specific embodiments.

  FIG. 1A is a schematic cross-sectional view illustrating one operating state of a cutting tool according to a preferred embodiment of the present invention. The cutting tool 100 includes an electric motor 10, a cutting blade 20, a slider 30 to which the cutting blade 20 is attached, and an operation mechanism that is connected to the electric motor 10 and supports the slider 30 so as to be able to reciprocate. In the example shown in FIG. 1A, the operating mechanism is a crank mechanism 40. This will be specifically described below.

  The cutting tool 100 includes a housing 50 having a cross-sectional key shape extending in the front-rear direction and the vertical direction. A slider 30 that reciprocates in the vertical direction is accommodated in a portion extending in the vertical direction of the housing 50. The slider 30 is supported by two bearings 31 at the top and bottom in the axial direction. The lower end of the slider 30 protrudes from a hole formed in the lower end of a portion extending in the vertical direction of the housing 50, and the cutting blade 20 is attached to the most distal end portion thereof through any appropriate attachment means.

  The crank mechanism 40 is accommodated in the upper part of the slider 30 in a portion extending in the vertical direction of the housing 50. The crank mechanism 40 converts the rotary motion of the electric motor 10 into a reciprocating motion and transmits it to the slider 30. More specifically, the crank mechanism 40 is connected to the drive shaft 11 of the electric motor 10 via the coupling 12 and is rotatably supported by a bearing 45, and the rotation of the electric motor 10 via the crank shaft 41. The crank disk 42 rotated in accordance with the crank disk 42, the crank pin 43 eccentrically attached to the crank disk 42, and the rotary motion of the crank pin 43 converted into a reciprocating motion by converting the rotary motion of the crank pin 43 into the reciprocating motion. And a relay member 44 serving as a connecting rod for transmitting to the terminal. The crankshaft 41 is inserted into a hole formed in the center of the crank disk 42 and is integrated coaxially.

  Therefore, when the electric motor 10 is driven and the crank disk 42 is rotated from the drive shaft 11, the rotation movement of the crank pin 43 that rotates integrally with the crank disk 42 is converted into a reciprocating movement by the relay member 44 as a connecting rod. Is transmitted to the slider 30, and the slider 30 reciprocates in the axial direction. As a result, the cutting blade 20 attached to the slider 30 cuts the object to be cut.

  In the present invention, the crank mechanism 40 is configured such that the reciprocating distance (hereinafter also referred to as amplitude) of the reciprocating motion of the slider 30 can vary. That is, the crank mechanism 40 has a function of adjusting the amplitude of the slider 30. Specifically, a crank pin position adjusting screw 46 is inserted from the outer peripheral portion of the crank disk 42 in the radial direction. On the other hand, the crank pin 43 is formed with a screw hole in a portion corresponding to the crank pin position adjusting screw 46 in a portion extending inside the crank disk 42 and is screwed into the crank pin position adjusting screw 46 through the screw hole. In addition, a long hole for moving the crank pin is formed in the radial direction on the crank pin mounting surface of the crank disk 42. According to such a configuration, for example, when the crank pin position adjusting screw 46 is turned in the state shown in FIG. 1A (the crank pin is near the outer periphery of the crank disk), the crank pin 43 screwed to the screw 46 moves. 1B is moved (a state in which the crank pin is near the center of the crank disk). As a result, the amplitude of the slider 30 can be adjusted. For example, the amplitude of the slider 30 is large in the state of FIG. 1A where the crank pin is near the outer periphery of the crank disk, and the amplitude of the slider 30 is small in the state of FIG. 1B where the crank pin is near the center of the crank disk. According to the present invention, since the position of the crank pin 43 can be adjusted by the amount of rotation of the screw 46, the amplitude of the slider (as a result, the cutting blade) can be precisely adjusted. Specifically, the amplitude of the slider can be varied in multiple stages (preferably substantially continuously) according to the material and thickness of the object to be cut, not in two stages such as “large and small”.

  FIG. 2A is a schematic cross-sectional view illustrating one operating state of a cutting tool according to another preferred embodiment of the present invention. In the present embodiment, the operating mechanism is a link mechanism 70. Specifically, the electric motor 10 and the link mechanism 70 are accommodated in an inner cylinder 52 that is fitted into a guide 51 in the housing 50 and moves in the left-right direction in the housing. A wall 54 is provided at the end 53 of the inner cylinder 52 opposite to the electric motor 10, and a position adjustment screw 55 screwed into the screw hole formed in the housing 50 from the outside of the housing 50 is formed on the wall 54. The end is fixed. By turning the position adjusting screw 55, the wall 54 to which the screw is fixed moves in the left-right direction, and thereby the entire inner cylinder 52 moves in the left-right direction. The link mechanism 70 according to the present embodiment is a three-dimensional link mechanism including four links 71a, 71b, 71c and 71d and three joints (for example, ball joints) 72a, 72b and 72c. The link 71a is connected to the drive shaft 11 of the electric motor 10 via the coupling 12, and is rotatably supported by a bearing. The link 71d is fixed to the wall 54. One end of the link 71b is movably connected to the link 71a via the joint 72a, and the other end is movably connected to the link 71c via the joint 72b. The end of the link 71c that is not connected to the link 71b is connected to the link 71d via a joint 72c so as to be freely movable. Each of the links 71b and 71c defines a variable angle with respect to the rotation axis of the electric motor 10. As a result, when the electric motor 10 is driven and the link 71a is rotated from the drive shaft 11, the links 71b and 71c rotate so that the connecting portion draws a circle around the rotation axis (link 71a) of the electric motor 10 ( Hereinafter, the movement that rotates in a circle around the rotation axis of the electric motor is also simply referred to as a circular movement). A reciprocating motion conversion mechanism 80 is attached to the link mechanism 70. The reciprocating motion conversion mechanism 80 is typically attached by rotating a rotating body 81 by inserting a link 71b through the rotating body. The rotating body 81 is movable relative to the link 71b. As shown in FIG. 2C, the reciprocating motion conversion mechanism 80 has a circular motion in which the center of the rotating body 81 is interlocked with the circular motion of the link 71 b, and as a result, the pin 82 eccentrically attached to the rotating body 81 rotates. Performs a circular motion in conjunction with the circular motion of the body. A relay member 83 as a connecting rod is attached to the pin 82, and the circular motion of the pin 82 is converted into a reciprocating motion and transmitted to the slider 30. Therefore, when the motor 10 is driven and the link 71b is rotated by rotating the link 71a from the drive shaft 11, the center of the rotating body 81 moves circularly in conjunction with the circular motion, and the circular motion is connected. The relay member 83 as a rod is converted into a reciprocating motion and transmitted to the slider 30, and the slider 30 reciprocates in the axial direction. As a result, the cutting blade 20 attached to the slider 30 cuts the object to be cut.

  In the present embodiment, the amplitude of the slider 30 can be adjusted by moving the position of the rotating body 81 in the link 71b and / or by changing the rotational radius of the circular motion of the link 71b. Specifically, when the wall 54 is moved by turning the position adjusting screw 55 and thereby the inner cylinder 52 is moved, the position of the rotating body 81 in the link 71b is moved. For example, when the position adjusting screw 55 is turned in the state shown in FIG. 2A (in which the inner cylinder 52 is close to the right side of the housing), the inner cylinder whose end is fixed to the screw 55 passes through the guide 51 inside the housing. It moves to the left and becomes a state as shown in FIG. 2B (a state where the inner cylinder 52 is close to the left side of the housing). As a result, in the state shown in FIG. 2B, the position of the rotating body in the link 71b moves relatively to the link 71a side than in the state shown in FIG. 2A. Since the center of the rotator 81 is circularly moved in conjunction with the circular motion of the link 71b, the radius of the circular motion at the center of the rotator 81 in FIG. 2B is smaller than the radius of the circular motion in FIG. 2A. As a result, the amplitude of the slider 30 in the state shown in FIG. 2B is smaller than that in the state shown in FIG. 2A. According to the present embodiment, the position of the inner cylinder 52 can be adjusted by the amount of rotation of the screw 55, and the radius of the circular motion of the rotating body 81 interlocked with the link 71b can be adjusted. Similar to the embodiment, the amplitude of the slider (as a result, the cutting blade) can be precisely adjusted. Specifically, the amplitude of the slider can be varied in multiple stages (preferably substantially continuously) according to the material and thickness of the object to be cut, not in two stages such as “large and small”. Furthermore, according to the present embodiment, the amplitude of the slider can be adjusted from the outside of the cutting tool. If the end of the inner cylinder 52 on the electric motor 10 side is fixed, when the wall 54 is moved by turning the position adjusting screw 55, the angle defined by the links 71b and 71c with respect to the rotating shaft of the electric motor changes (FIG. Not shown). As a result, the rotational radius of the circular motion of the link 71b changes. As a result, the radius of the circular motion of the rotating body 81 interlocked with the link 71b can be changed.

  FIG. 2D is a schematic cross-sectional view showing another example of a connection form between the electric motor and the link mechanism in the embodiment shown in FIGS. 2A and 2B. In the embodiment shown in FIG. 2D, the driving force of the electric motor 10 is transmitted to the link mechanism 70 (substantially the link 71a) via the pulleys 91 and 93 and the belt 92. With such a configuration, the housing can be made compact.

  The forms specifically described above may be combined as appropriate. As a representative example of the operation mechanism, the crank mechanism and the link mechanism have been described. However, as the operation mechanism in the present invention, any appropriate mechanism capable of converting the rotational motion of the electric motor 10 into a reciprocating motion is adopted. obtain. Other representative examples of the operating mechanism include a Scotch-yoke mechanism and a rack and pinion mechanism.

  FIG. 3 is a schematic perspective view of a cutting device according to a preferred embodiment of the present invention. The cutting device 200 includes a cutting tool 100 according to the present invention, a mounting part 110 that can be replaced in a two-dimensional direction, a control unit 120 that controls the movement of the mounting part 110, and a cutting tool. And a mounting table 130 on which the object 140 is mounted. More specifically, the attachment part 110 includes an attachment head 111 for attaching the cutting tool 100 in a replaceable manner, a first moving part 112 for attaching the attachment head 111 so as to be movable up and down and rotatable, and a first moving part 112 in the left-right direction. A second moving portion 113 that is movably supported, and left and right support portions 114 and 114 that support both left and right ends of the second moving portion and are movable in the front-rear direction. With such a configuration, the mounting portion 110 can be moved in a two-dimensional direction.

  The movement and operation of the attachment part 110 are controlled by the control part 120 according to the desired cutting shape of the cutting object. The control unit 120 has a calculation unit (not shown). The calculation unit outputs a control command according to predetermined processing data (for example, CAD data relating to which position of the cutting target 140 is processed) input to the calculation unit, and according to the control command, Processing is performed. Specifically, the control unit 120 moves the first moving unit 112 in the left-right direction and moves the second moving unit 113 in the front-rear direction, thereby moving the mounting unit 110 in the front-rear / left-right direction and the mounting head. 11 is rotated to a desired angle, and the cutting tool 100 (substantially, its cutting blade) is moved back and forth, right and left, and obliquely, thereby processing the object to be cut.

  The cutting tool of the present invention can be suitably used when cutting a cardboard or a resin molded body into a desired shape.

DESCRIPTION OF SYMBOLS 10 Electric motor 20 Cutting blade 30 Slider 40 Crank mechanism 41 Crank shaft 42 Crank disc 43 Crank pin 44 Relay member 46 Position adjusting screw 50 Housing 52 Inner cylinder 54 Wall 55 Position adjusting screw 70 Link mechanism 71a, 71b, 71c, 71d Link 72a, 72b, 72c Joint 80 Reciprocating motion conversion mechanism 81 Rotating body 82 Pin 83 Relay member 100 Cutting tool 110 Mounting portion 120 Control portion 130 Mounting table 140 Cutting object 200 Cutting device

Claims (4)

A housing, an electric motor, a cutting blade, a slider to which the cutting blade is attached, and an operating mechanism connected to the electric motor to support the slider so as to be capable of reciprocating;
A cutting tool in which the operation mechanism is configured to be capable of changing a reciprocating distance of a reciprocating motion of the slider. The operating mechanism is a crank mechanism;
A crank disk that is rotated according to the rotation of the electric motor; a crank pin that is eccentrically attached to the crank disk and rotated integrally with the crank disk; and a reciprocating motion of the crank pin. A relay member that converts to the slider and transmits it to the slider,
The crank pin is attached to be movable in the radial direction of the crank disk;
The cutting tool according to claim 1. The operating mechanism has a link mechanism and a reciprocating motion conversion mechanism,
The link mechanism defines a predetermined angle with respect to the rotating shaft of the electric motor, and includes a link that moves circularly around the rotating shaft of the electric motor,
The reciprocating motion conversion mechanism has a rotating body whose center moves circularly in conjunction with the circular motion of the link, and a relay member that converts the circular motion of the rotating body into reciprocating motion and transmits the reciprocating motion to the slider. ,
The rotating body is mounted so as to be movable relative to the link, and when the rotating body moves in the link and the radius of circular motion at the center of the rotating body changes, Fluctuate the reciprocating distance of reciprocating motion,
The cutting tool according to claim 1. The cutting tool according to any one of claims 1 to 3, a mounting portion that can be replaced in a two-dimensional direction, a control unit that controls movement of the mounting portion, and a cutting target A cutting device comprising a mounting table for mounting an object.

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