JPH06210589A - Cutting device for sheet material - Google Patents

Abstract

PURPOSE:To provide a cutting device which can suitably cut a corrugated cardboard or the like without collapsing the cut face. CONSTITUTION:A turbine structure is used for a prime-mover for a cutting device 7. That is, rotary blades 9 is rotated under the action of compressed air fed into a casing 8, counterclockwise together with a disc 10, in a noncontact condition with respect to the inner peripheral surface of the casing 8. Then, a connecting rod 13 is operated eccentrically from the center axis of the disc 10, and a cutting edge part 17a of a knife 77 attached to the free end side of the connecting rod 13 therebelow is moved so as to depict a substantially circular locus in a clockwise direction in a plane perpendicular to the plane of a corrugated cardboard 2. Accordingly, the cutting edge 17a of the knife 17 wedges into the corrugated cardboard 2 so as to cut the corrugated cardboard 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for cutting a sheet material such as cardboard or paper into a predetermined shape.

[0002]

2. Description of the Related Art For example, when assembling a box using corrugated cardboard, a sheet-shaped corrugated board is preliminarily cut into a predetermined shape corresponding to the box shape. In this case, the conventional method, for example, FIG.
The cutting device 1 as shown in FIG. In the cutting device 1, as shown in the figure, a knife 3 is slidably supported in a direction perpendicular to the plane of the corrugated board 2.
The knife 3 is connected to a prime mover 5 composed of an air motor via a crank mechanism 4. And the knife 3 above
Is vertically driven by the prime mover 5 and is moved in the direction of arrow 6 relative to the plane of the corrugated board 2, whereby the corrugated board 2 is cut into a predetermined shape.

[0003]

However, in the conventional cutting device as described above, since the knife 3 is simply driven to vibrate in the vertical direction as described above, the cut surface of the corrugated board 2 is crushed. There was a possibility that Therefore,
The present invention was devised in view of the above circumstances, and an object thereof is to provide a sheet material cutting device capable of performing a suitable cutting process without crushing the cut surface when cutting a corrugated board. is there.

[0004]

In order to achieve the above-mentioned object, the main means adopted by the present invention is the gist of the above-mentioned knife in a device for cutting a sheet material by a knife driven by a prime mover. The sheet material cutting device according to claim 1, further comprising an operating mechanism for operating the knife so that the blade edge portion draws a substantially circular locus in a plane substantially perpendicular to the plane of the sheet material.

[0005]

In the cutting device having the above structure, the corrugated cardboard is cut while the cutting edge of the knife bites into the corrugated cardboard, which is an example of the sheet material, in an oblique direction. It is cut smoothly.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the accompanying drawings for the understanding of the present invention. The following embodiments are examples of embodying the present invention and are not intended to limit the technical scope of the present invention. Here, FIG. 1 shows a cutting device according to an embodiment of the present invention, in which (A) is a side sectional view and (B) is a front sectional view.
In the cutting device 7 according to this embodiment, as shown in FIGS.
As shown in, inside the casing 8 to which compressed air is supplied,
A disk 10 having a rotary blade 9 on its outer peripheral surface is used as a bearing 11, 1.
1 is rotatably supported, and the tip portion of the rotary blade 9 is in non-contact with the inner peripheral surface of the casing 8. The disk 10 is driven to rotate counterclockwise in a side view by the action of the compressed air on the rotary blade 9. In this case, the casing 8, the rotor blades 9, the disk 10, the bearing 11 and the like constitute a prime mover 12 having a turbine structure. Connecting rods 13 are disposed on both sides of the disk 10 in a front view, and the connecting rod 13 is rotatably supported by bearings 14 and 14 eccentrically with respect to the axis of the disk 10. A shaft 15 extending downward is connected to a lower portion of the connecting rod 13, and an intermediate portion thereof is
It is supported by a spherical bearing 16 so as to be vertically slidable and swingable. Further, a knife 17 is replaceably mounted on the lower free end side of the shaft 15. Therefore, when the disk 10 is driven to rotate counterclockwise by the action of compressed air, the cutting edge portion 17a of the knife 17 is in a plane substantially perpendicular to the plane of the corrugated board 2 which is an example of the sheet material. It is operated so as to draw a substantially circular locus in the clockwise direction. The cutting device 7 according to this embodiment is configured as described above.

Next, the operation of the cutting device 7 when cutting the corrugated board 2 will be described. First, when compressed air is supplied into the casing 8, the rotary vane 9 receives the action of the compressed air, so that the disk 10 is rotationally driven counterclockwise. In this case, since the tip portion of the rotary blade 9 rotates in a state of not contacting the inner peripheral surface of the casing 8, there is no sliding contact portion as in the conventional prime mover 5 (see FIG. 2), and It is possible to prolong the service life of the entire device by reducing the number of mechanically worn portions. When the disc 10 rotates, the connecting rod 13 is eccentrically moved, and the shaft 15 is oscillated while sliding in the vertical direction. As a result, the cutting edge portion 17 of the knife 17
a is operated so as to draw a substantially circular locus in the clockwise direction within a plane substantially perpendicular to the plane of the corrugated board 2. Under the above operating conditions, the cutting device 7 is moved in the direction of arrow 6 relative to the corrugated board 2, so that the blade tip portion 17a of the knife 17 bites into the corrugated board 2 in an oblique direction. The cardboard 2 is cut. As a result, the corrugated board 2 is appropriately cut without crushing the cut surface. It is needless to say that the cutting device 7 can appropriately cut any other sheet material such as paper, resin material, and leather material instead of the corrugated board 2.

[0008]

As described above, the present invention is an apparatus for cutting a sheet material by a knife driven by a prime mover, in which the blade edge portion of the knife is substantially perpendicular to the plane of the sheet material. Since the sheet material cutting device is equipped with an operating mechanism for operating the knife so as to draw a substantially circular locus, for example, the blade edge portion of the knife is slanted with respect to the corrugated cardboard which is an example of the sheet material. The corrugated board is cut while biting in the direction. As a result, when the corrugated cardboard is cut, the cut surface is not crushed and is preferably cut.

[Brief description of drawings]

1A and 1B show a cutting device according to an embodiment of the present invention, in which FIG. 1A is a side sectional view and FIG. 1B is a front sectional view.

FIG. 2 is a schematic configuration diagram of a conventional cutting device.

[Explanation of symbols]

2 ... Corrugated board 7 ... Cutting device 8 ... Casing 9 ... Rotor blades 10 ... Disks 11, 14 ...
Bearing 12 ... Motor 13 ... Connecting rod 15 ... Shaft 16 ... Spherical bearing 17 ... Knife 17a ... Cutting edge portion

Claims (1)

[Claims] 1. An apparatus for cutting a sheet material by a knife driven by a prime mover, wherein the cutting edge portion of the knife draws a substantially circular locus within a plane substantially perpendicular to the plane of the sheet material. An apparatus for cutting a sheet material, comprising an operation mechanism for operating the sheet material.