JPH05213324A - Film cutter - Google Patents

Abstract

PURPOSE:To provide a film cutter capable of protecting the hand and finger from injury. CONSTITUTION:The driving of a cutter 16 is separated from the driving of a seal holding bar 7, and the cutter 16 is driven after the lower limit position of the seal holding bar 7 is detected. Therefor, as a lower limit switch 15 is not activated even when a hand or finger having a thickness is caught, the cutter 15 is not brought in action, so that the hand and finger are protected from injury.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film cutting device for heat-sealing a packaging film and then cutting and separating the film.

[0002]

2. Description of the Related Art When a packaging film is cut, it may accidentally injure a hand, a finger or the like, and its safety is required.

A conventional film cutting device will be described with reference to FIG. As shown in the figure, the drive motor 1
A cutter 5 is fixed to a shaft 4 that moves up and down by a crank 2 and a link 3. The seal retainer bar 7 is held by the cutter 5 via a spring 6. Further, the seal base 8 is a nichrome wire 8a for welding the film 9
Are arranged.

In the above structure, when the shaft 4 descends, the seal retainer bar 7 descends to the seal base 8 to retain the film 9, and when the crank 2 approaches the lower limit position and the shaft 4 descends, the cutter 5 causes the seal 5 to move. It projects between 8 and cuts the film 9.

[0005]

However, in such a mechanism, the crank 2 makes one continuous movement, and foreign matter other than the film 9, such as a hand or a finger, is caught when the seal holding bar 7 is lowered. If the error occurs, even if the drive of the motor 1 is stopped by the foreign matter detection switch, the motor 1 continues to overrun, and there is a risk that the cutter 5 descends and injures a hand, a finger, or the like.

The present invention solves the above problems, and an object of the present invention is to prevent the injuries of hands and fingers by a cutter.

[0007]

In order to achieve the above object, the present invention is configured such that the drive of the cutter is separated from the drive of the seal pressing bar, and the cutter is driven after the lower limit position of the seal pressing bar is detected. is there.

[0008]

According to the present invention, in the above structure, the seal holding bar is lowered by the drive motor via the belt to hold the film on the seal base. At this time, at the same time, when the lower limit position of the seal retainer bar is detected, the cutter is driven to cut the film sandwiched between the seal retainer bar and the seal base. Therefore, when a thick hand or finger is inserted between the seal retainer bar and the seal base, the seal retainer bar does not come into close contact with the seal base, that is, the lower limit switch does not operate, so the cutter is not driven and the It will not hurt your fingers.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same components as those described in the conventional example are designated by the same reference numerals, and the description thereof will be omitted.

As shown in the figure, the seal retainer bar 7 is held by the guide brackets 10 of the guide rails 11 facing each other. The guide bracket 10 is fixed to the belt 13 by a metal fitting 12. To detect the upper limit position and the lower limit position of the seal retainer bar 7, the upper limit switch 14
And the lower limit switch 15 is attached so as to detect the vertical position of the guide bracket 10. The seal base 8 has nichrome wires 8a for welding the film arranged in front of and behind the cutter 16. The cutter 16 is fixed to a plunger 17a of a solenoid 17 that performs a vertical stroke operation.

Next, the operation of the above configuration will be described. FIG. 2 is a schematic side view showing a film cutting process.
In FIG. 2A, the seal retainer bar 7 is held by the guide bracket 10 and is stationary at the upper limit position. Two films 9 are placed between the seal base 8 and the seal retainer bar 7.
a and 9b are set. Next, the drive motor 1 shown in FIG.
Is operated to move the seal pressing bar 7 downward via the belt 13. As shown in Fig. 2 (b), the seal retainer bar 7
The film 9a, when it descends until it comes into close contact with the seal base 8.
9b is sandwiched between them. At this time, when the lower limit switch 15 detects that the seal holding bar 7 is at the lower limit position, the solenoid 17 is turned on and the plunger 17 is turned on.
The cutter 16 rises via a, and at the same time the nichrome wire 8
The power is also turned on to a. The power is turned off after a certain period of time, and the cutter 16 descends again. In this way, the films 9a and 9b are linearly welded in two places by the nichrome wire 8a, and the space between them is cut by the cutter 16. After cutting, as shown in FIG. 2C, the drive motor 1 rotates in the reverse direction and the seal pressing bar 7 rises. When the upper limit switch 14 detects the upper limit position, the drive motor 1 is stopped and the seal retainer bar 7 is again stopped at the upper limit position.

Therefore, since the cutter is driven after the lower limit position of the seal pressing bar 7 is detected, it is possible to prevent injury even when a thick hand or finger is caught in the apparatus. Further, since the seal pressing bar 7 and the cutter 16 are independently driven, it is easy to change the pressing time, the cutting time and the cutting force.

[0013]

As is apparent from the above description of the embodiments, the present invention is designed so that the cutter does not move up, that is, does not cut unless the lower limit switch is turned on. It is safe even if your hands or fingers are caught in this device.

[Brief description of drawings]

FIG. 1 is a perspective view of a film cutting apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic side view showing a film cutting step in the example.

FIG. 3 is a perspective view of a conventional film cutting device.

[Explanation of symbols]

 7 Seal presser bar 8 Seal base 10 Guide bracket 11 Guide rail 14 Upper limit switch 15 Lower limit switch 16 Cutter 17 Solenoid

Claims (1)

[Claims] 1. A guide rail facing each other, a seal retainer bar which is held by a guide bracket and can move in parallel in the vertical direction, an upper limit switch mounted on the guide rail side for detecting the upper and lower limit positions of the seal retainer bar, and It is equipped with a lower limit switch and a cutter that is held between two seal bases and held by a drive solenoid for moving up and down, and separates the drive of the cutter from the drive of the seal retainer bar, and the lower limit of the seal retainer bar. A film cutting device configured to drive a cutter after position detection.