JPH106277A - Elastic body cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elastic body cutting device which excels in the cutting ability. SOLUTION: On air dampers 4, 4 (blade supporting means), a cutter blade 2 (mounting table 3) is supported at the ends resiliently, and an air cylinder 12 of a pressing means 5 is elongated to press a pressure roller 11 to the cutter blade 2. With movement of the pressing means 5, the pressing position by the pressure roller 11 is changed gradually in the longitudinal direction. With this change of the pressing position, a sheet-form elastic body 25 is cut in order while the cutting edge 2a in the form of circular arc of the cutter blade 2 is rotating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic body cutting device for cutting a sheet-like elastic body.

[0002]

2. Description of the Related Art Conventionally, when cutting an elastic body such as a sheet-like rubber sheet, as shown in FIG. 5, for example, a pressing device a such as an air thinner presses a circular blade b against a cutting table c. While rotating, it is moved on the cut object d in a predetermined direction to cut the cut object d.

[0003]

However, in such an apparatus, the radius of the circular blade b cannot be made too large (for example, when the radius is 150 to 300 mm,
If the pressing force against the circular blade during cutting is increased, the circular blade may be damaged, the cutting table may be damaged, and the like, and the pressing force cannot be increased. Therefore, sufficient cutting ability cannot be expected.

[0004] The present invention has been made in view of the above points, and an object of the present invention is to provide an elastic body cutting device having excellent cutting ability.

[0005]

According to the first aspect of the present invention, there is provided an elastic body cutting apparatus for cutting a sheet-like elastic body, comprising: a cutting blade having an arc-shaped blade portion having a small height difference in a longitudinal direction; Blade supporting means for elastically supporting the cutting blade, and a pressing portion for pressing the cutting blade, the pressing portion is gradually moved along the longitudinal direction of the cutting blade, and the arc blade is rotated while rotating the cutting blade. And a pressing means for causing the portion to cut.

According to the first aspect of the present invention, the cutting blade elastically supported by the blade supporting means is configured such that the pressing portion of the pressing means is gradually moved along the longitudinal direction of the cutting blade, so that the pressing portion is provided. Is gradually changed along the longitudinal direction, the cutting blade is rotated, and the sheet-like elastic body is gradually cut by the arc blade portion.

According to a second aspect of the present invention, in the elastic body cutting apparatus according to the first aspect, the cutting blade is mounted on a mounting table, and the pressing means is capable of rolling on an upper edge of the mounting table so as to press the pressing table. A pressing roller portion serving as a portion, an air cylinder supporting the pressing roller portion, and a movable carriage to which the air cylinder is attached and which can move along the longitudinal direction of the cutting blade.

According to the second aspect of the present invention, the mounting base of the cutting blade is pressed by the pressing roller by the extension operation of the air cylinder, whereby the arc blade of the cutting blade is cut into the object to be cut. When the movable carriage is moved, the pressing roller rolls on the upper edge of the mounting table, and the pressing position on the mounting table (cutting blade) is gradually changed along the longitudinal direction. Therefore, the cutting blade is rotated,
The sheet-shaped elastic body is gradually cut by the arc blade portion.

According to a third aspect of the present invention, in the elastic body cutting apparatus of the second aspect, the blade supporting means is an air damper, and both ends of the mounting table are supported by the air damper.

According to the third aspect of the present invention, both ends of the mounting table to which the cutting blade is mounted are elastically supported by the air dampers.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1 showing a schematic configuration, reference numeral 1 denotes an elastic body cutting device for cutting a sheet-like elastic body, and a cutting blade 2 having an arc-shaped blade portion 2a having a small height difference in a longitudinal direction; The mounting table 3 on which the blade 2 is mounted, the air dampers 4 and 4 serving as blade supporting means for elastically supporting both ends of the mounting table 3, and the pressing position on the mounting table 3 (cutting blade 2) Move it gradually along its longitudinal direction,
Pressing means 5 for cutting the arc blade portion 2 a while rotating the cutting blade 2 is provided, and these are attached to the frame 6.

The pressing means 5 includes a pressing roller 11 capable of rolling the upper edge of the mounting table 3 of the cutting blade 2, an air cylinder 12 for elastically supporting the pressing roller 11, And a movable carriage 13 to which the cylinder 12 is attached and which is movable along the longitudinal direction of the cutting blade 2. In addition, the lower circular blade portion 2a of the cutting blade 2 has a radius of 5,000 to 5,000.
At the time of non-cutting, the two air dampers 4 and 4 have substantially the same length in the free state, and are arranged such that the central portion is located at the lowest position.

The movable carriage 13 has an engagement portion (not shown) movably engaged with the guide rails 21 and 21, and is rotatably driven by the motor 22 between the engagement portions. A screw portion (not shown) that is rotatably screwed to the screw rod 23 is provided. The motor 22 is provided on an auxiliary frame 6 a connected to an upper portion of the frame 6. A drive pulley 24 is connected to a motor shaft of the motor 22, and the drive pulley 24 is linked to a driven pulley 25 connected to a screw rod 23 via a transmission belt 26. 23, the moving carriage 13 and thus the pressing roller portion 11 gradually move along the longitudinal direction of the cutting blade 2 to change the pressing position of the pressing roller portion 11 against the mounting table 3 by the pressing roller portion 11 so that the cutting blade 2 Is rotated to cause the arc blade portion 2a to cut.

Reference numeral 24 denotes a sheet-like elastic body 2 to be cut.
5 (see FIG. 3) is a sheet feed roll for feeding the sheet onto the cutting table 26.

With the above construction, the cutting blade 2 is moved to a position sufficiently away from the upper surface of the cutting table 26 by the urging force of the air dampers 4 and 4 in a normal state where cutting is not performed, as shown in FIG. Will be retained.

When the elastic body 25 on the cutting table 26 is to be cut, first, as shown in FIG.
Of the mounting table 13 is pressed at a constant pressure. At this time,
The mounting table 3 is deflected downward by the pressing force of the pressing roller unit 11, and the air damper 4 on the side closer to the part pressed by the pressing roller unit 11 is extended, and as a result, the arc of the cutting blade 2 is formed. The blade portion 2 a is cut near the end of the elastic body 25 and pressed against the cutting table 26.

Then, in this state, the mobile trolley 13
The cutting blade 2 is moved along the guide rails 21 and 21 in the longitudinal direction of the cutting blade 2 by the drive of the motor 22 (see FIG. 4B), and following the movement, the cutting table 26 of the cutting blade 2 is moved.
The position pressed by the pressing roller unit 11 gradually moves from left to right in FIG. Due to this movement, the elastic body 25 placed on the cutting table 26 is gradually cut by the arcuate blade portion 2a while the cutting blade 2 rotates so as to roll on the elastic body 25.

Then, when the pressing roller 11 finishes pressing along the entire length of the mounting base 3 along the length direction of the cutting blade 2 (see FIG. 4C), the cutting of the elastic body 25 is completed. I do.

Thus, the height difference in the length direction is small,
Since the sheet-like elastic body 25 is cut while rotating the arc-shaped blade portion 2a of the cutting blade 2 having a large radius, a large pressing force is not required for cutting the sheet-like elastic body 25. Cutting can be performed smoothly without causing a problem of damage to the blade 2 and the cutting table 26.

In the above embodiment, the blade supporting means is constituted by an air damper. However, the present invention is not limited to this, and an elastic member such as a spring may be used.

[0022]

According to the first aspect of the present invention, as described above, the pressing portion of the pressing means is gradually moved along the longitudinal direction of the cutting blade, and the pressing position by the pressing portion is gradually changed along the longitudinal direction. The sheet-like elastic body is gradually cut while changing the arc blade part of the cutting blade, so that the sheet-like elastic body can be cut smoothly and the cutting ability is improved. Can be planned. Therefore, it is not necessary to increase the pressing force for pressing the cutting blade against the sheet-like elastic body, and the problem of breakage of the cutting blade does not occur.

According to the second aspect of the present invention, the pressing roller portion is applied to the mounting table of the cutting blade by the extension operation of the air cylinder, and the pressing position is moved by the moving means, so that the cutting operation by the cutting blade is controlled. Can be done easily.

According to the third aspect of the present invention, since both ends of the mounting table to which the cutting blade is mounted are elastically supported by the air damper, the elastic support of the cutting blade can be performed with a simple structure. it can.

[Brief description of the drawings]

FIG. 1 is a front view of an elastic body cutting device according to an embodiment of the present invention.

FIG. 2 is a side view of the elastic body cutting device according to the embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of an elastic body cutting device according to an embodiment of the present invention.

FIGS. 4A to 4C are explanatory diagrams of a cutting operation.

FIG. 5 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elastic body cutting device 2 Cutting blade 2a Arc blade part 3 Mounting stand 4 Air damper (blade support means) 5 Pressing means 11 Press roller part 12 Air cylinder 13 Moving carriage 25 Sheet-like elastic body

Claims (3)

[Claims] 1. An elastic body cutting apparatus for cutting a sheet-like elastic body, comprising: a cutting blade having an arc-shaped blade portion having a small height difference in a length direction; and blade supporting means for elastically supporting the cutting blade. And a pressing means having a pressing portion for pressing the cutting blade, gradually moving the pressing portion along the longitudinal direction of the cutting blade, and cutting the arc blade portion while rotating the cutting blade. An elastic body cutting device characterized by the above-mentioned. 2. The cutting blade is attached to a mounting table, and the pressing means supports the pressing roller section, which can roll on an upper edge of the mounting table and serves as the pressing section, and the pressing roller section. 2. The elastic body cutting device according to claim 1, further comprising an air cylinder, and a movable carriage to which the air cylinder is attached and is movable along a longitudinal direction of the cutting blade. 3. The elastic body cutting device according to claim 2, wherein said blade supporting means is an air damper, and said air damper supports both ends of said mounting base.