JP4258153B2 - Cutting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cutting device for safely cutting a flexible object.
[0002]
[Prior art]
For example, when a coiled plastic foam sheet is slit to a certain width, the coil is placed on a table and is directed to a working blade, typically a saw blade such as a band saw or circular saw. And push to cut. The same operation is performed on a plastic foam sheet, that is, a plastic processed product obtained by bonding a flat plastic back film to the bottom of the projection of a plastic cap film provided with a number of projections by vacuum forming. It is also necessary for what has been wound up.
[0003]
Cutting the coil-shaped article as described above is often performed manually, that is, by pushing the object to be cut toward the blade by hand in many cases due to a change in the width to be cut. Since such an operation is dangerous, it is desirable to be able to perform the operation without getting close to the blade even if it is not automatic. However, coils of flexible articles such as plastic foam sheets and plastic foam sheets can be easily deformed by a slight external force, so it is difficult to obtain the desired slit product unless the force applied to the coil can be finely adjusted. is there.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a cutting apparatus that can safely perform cutting of a flexible article with a blade, represented by a coil of a plastic foam sheet or a plastic foam sheet, in view of the current state of the technology as described above. .
[0005]
[Means for Solving the Problems]
The cutting device of the present invention that achieves the above object is a device that cuts a flexible object, and is for placing an object to be cut as shown in FIG. 1 as a plan view and as shown in a side view in FIG. The table (1) provided with a stop plate (2) at one end thereof, a fixing means for fixing the object to be cut on the table in cooperation with the stop plate, a cutting tool (3) for cutting and its driving means (FIG. (Not shown), and a cutting device comprising a means (not shown) for relatively moving the table and the blade to advance the cutting, the fixing means includes a stop plate (2) on the table, and A pressing device (4) that presses an object to be cut, and the pressing device (4) includes an inclined L-shaped backup frame (5) and a flexible touch sensor (6) stretched at both ends thereof, and Press the touch sensor against the workpiece and release it Comprising a moving means (7) for advancing retract the backup frame in order, where the touch sensor detects that the contact with the object to be cut, stop the backup frame to secure toward the object to be cut to the stop plate It is characterized by comprising.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
A typical structure of the touch sensor (6) is a structure in which two conductors are arranged in a flexible tube-like body at a slight distance. When the tube contacts an object, the two conductors are arranged. The contact is detected by causing electrical conduction between the two. It is desirable to adjust the tension of the tube in accordance with the hardness of the object to be contacted and to make it gentle if it is soft. As a means for achieving this object, it is preferable to attach a tension adjusting means such as a small air cylinder, for example, indicated by reference numeral (8) in FIG.
[0007]
The cutting device of the present invention is used as follows. First, a soft object (9) to be cut, for example, a coil of a bubble sheet, is placed on the table (1), and the backup frame (5) is moved toward the coil by the moving means (7). As shown in FIG. 3, when the touch sensor (6) stretched at both ends of the backup frame that has been moved contacts the coil (9), the contact is detected as an electrical signal output from the sensor. Therefore, the movement is stopped and the coil is fixed toward the stop plate (2). At this time, if the tension of the touch sensor (6) is adjusted according to the hardness and softness of the object to be cut, the force up to the necessary limit can be applied, and the soft object will be unduly distorted. It can be fixed to avoid it.
[0008]
Next, the table (1) on which the object to be cut is fixed is moved toward the cutting tool for cutting, in the example shown, the band saw (3). This movement is a relative movement, and it goes without saying that it is possible to move the blade with the table fixed, move the table with the blade fixed, or move both of them (Fig. 1 and FIG. 2 are examples of moving the table while fixing the blade). When the cutting is finished, in the case of slitting work, the backup frame (5) is retracted and the touch sensor (6) informs that the contact has been lost. To a predetermined amount. This movement is easy to perform automatically using an appropriate air cylinder or the like. When the predetermined amount of movement has been made, the second operation is performed by repeating the above operation.
[0009]
【The invention's effect】
All of the above operations can be automated by microcomputer control, and even if it does not lead to full automation, it is easy to realize a mode that does not require manual cutting after fixing the workpiece. In addition, since various dangers associated with cutting can be avoided, an operation of cutting a soft object such as a plastic bubble sheet can be performed safely and efficiently.
[Brief description of the drawings]
FIG. 1 is a side view showing an overall configuration of an example of a cutting apparatus according to the present invention.
FIG. 2 is a plan view of the apparatus of FIG.
FIG. 3 is a side view of the main part showing the stage of fixing the object to be cut in the apparatus of FIG. 1;
[Explanation of symbols]
1 Table 2 Stop plate 3 Cutlery (band saw)
4 Pressing device 5 Backup frame 6 Touch sensor 7 (Frame) moving means 8 Tension adjusting means (air cylinder)
9 Workpiece (coil)

Claims (3)

A device for cutting a flexible object, on which a workpiece is mounted, a table having a stop plate at one end, a fixing means for fixing the workpiece on the table in cooperation with the stop plate, for cutting In a cutting apparatus comprising a blade and its driving means, and means for relatively moving the table and the blade to advance the cutting, the fixing means presses the stop plate on the table and the object to be cut against it The pressure device includes an inclined L-shaped backup frame, a flexible touch sensor stretched at both ends thereof, and presses the touch sensor against an object to be cut and advances and retracts the backup frame to release it. It includes moving means, where the touch sensor detects that the contact with the object to be cut, to secure toward the stop plate object to be cut by stopping the backup frame Cutting apparatus characterized by being configured so. The cutting device according to claim 1, wherein the pressing device is provided with means for adjusting the tension of the touch sensor. The cutting device according to claim 1 or 2, for cutting a plastic foam sheet.

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