JP3014262U - Safety device for cutting machine - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a safety device having a simple structure without using solenoids. [Structure] When the push button of the push button switch that starts driving the cutting blade is pressed, the push rod descends in conjunction with the depression of the push button. When the push rod descends, the dog is pushed and rotated by the push rod, and the dog is removed from the descending passage of the cutting blade. Unless the push button is pressed, the dog collides with the cutting blade and prevents the cutting blade from descending.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a safety device for a cutting machine used for cutting papers.

[0002]

[Prior art]

 As is well known, in this type of cutting machine, the cutting blade is moved up and down by a motor or the like, and paper is cut in the process of lowering. Normally, a push button switch is used to drive the motor, and the push button switch causes the motor to rotate and the cutting blade to reciprocate. That is, the cutting blade is lowered at the beginning of rotation of the motor, and after a predetermined descending stroke, it is raised and returned to the initial position.

By the way, in the cutting machine having such a structure, the cutting blade should not be lowered by any chance even if the push button switch is not pressed. Therefore, conventionally, there is known a safety device in which a lock pin that penetrates the cutting blade in the raised position is provided and the cutting pin prevents the cutting blade from protruding or falling. This is so that when the push button switch is pressed, the solenoid is driven in conjunction with this, and the solenoid is used to pull out the lock pin from the cutting blade.

However, in such a safety device, a solenoid is required, so that the configuration becomes large, and an electric circuit required for driving the solenoid must be prepared, which is extremely complicated and expensive. .

[0005]

[Problems to be solved by the device]

 It is an object of the present invention to provide a safety device having a simple structure without using solenoids and therefore without preparing an electric circuit or the like for driving the solenoids.

[0006]

[Means for Solving the Problems]

 According to the present invention, a push button switch for starting the driving of the cutting blade, a push rod descending in conjunction with the pressing movement of the push button switch, and a spring are always biased by a spring so as to be positioned on the lowering passage of the cutting blade. When the push rod descends, the dog is pushed by the push rod to rotate against the elastic force of the spring and is removed from the descending passage.

[0007]

[Action]

 When the cutting blade is in the raised position, the dog is located on the descending path of the cutting blade. When the push button switch is pressed, the cutting blade starts to descend, but the dog rotates via the push rod in conjunction with the pushing movement of the push button switch, and the cutting blade is removed from the descending passage of the cutting blade. Therefore, when the push button switch is pressed, the cutting blade moves down without being disturbed by the dog.

If, for some reason, the push button switch is not pressed, if the cutting blade starts to descend, the cutting blade collides with the dog located on the descending passage, which causes It cannot descend beyond. This can prevent the cutting blade from descending when the push button switch is not pushed.

[0009]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 is a cutting blade, which moves up and down so as to pass between a pair of guides 3 and 4 installed on a cutting table 2. Similar to a normal cutting blade, this cutting blade 1 descends obliquely downward and rises through the same passage. In order to regulate the elevation of the cutting blade 1, a rotatable guide roller 5 is provided on the side surface of the cutting blade 1, and a slide 6 on which the guide roller 5 can be fitted is formed on the inner surface of the guide 3. The groove 6 extends obliquely downward. The guide 3 is configured in a gate shape, but a part thereof is omitted in the figure.

A push button switch 8 is installed on an upper wall 7 continuous with the upper end of the guide 4. This is composed of a push button 9 supported on the upper surface of the upper wall 7 so as to be able to move up and down, and a switch 10 fixed to the lower surface of the upper wall 7. When the push button 9 is pushed, the switch 10 is operated and a motor (not shown) for moving the cutting blade 1 up and down is driven. The push button 9 is above the cutting blade 1 in the raised position.

According to the present invention, a push rod 11 is provided. The push rod 11 is supported by a bearing 12 attached to the upper wall 7 so as to be able to move up and down. The upper end of the push button 9 is directly contacted with the lower surface of the push button 9 or is fixed thereto. Reference numeral 13 denotes a dog, which is swingably supported by a guide 4 about a shaft 14. A spring, specifically, a coil spring 15 is hung between the rear end of the dog 13 and the upper wall 7, and the dog 13 is biased counterclockwise about the shaft 14 by the coil spring 15. The lower end of the push rod 11 is on the rear end side of the shaft 14 and is in contact with the upper surface of the dog 13.

When the push button 9 is not pushed, the dog 13 is biased counterclockwise by the coil spring 15, but its bias position is regulated by coming into contact with the push rod 11. This regulation position is in a substantially horizontal state as shown in FIGS. 1 and 2, and the tip of the dog 13 faces the tip of the cutting blade 1. This position is on the descending path when the cutting blade 1 descends for cutting.

In the above structure, when the push button 9 is pushed, the cutting blade 1 starts to descend. At this time, the push rod 11 is pushed and descends in conjunction with the depression of the push button 1, whereby the dog 13 rotates clockwise about the shaft 14 against the elasticity of the coil spring 15. By this rotation, the tip of the dog 13 rises and is disengaged from the descending passage of the cutting blade 1. FIG. 3 shows the state at this time.

As a result, the cutting blade 1 descends without being disturbed by the dog 13. The cutting blade 1 descends obliquely downward as the guide roller 5 passes through the groove 6. After the cutting edge of the cutting blade 1 reaches the surface of the cutting table 2, it rises through the same path as when it descends and returns to the initial position.

Even if the dog 13 returns to the initial position due to the elasticity of the coil spring 15 due to the return of the push button 9 during this time, if the tapered portion 16 is formed on the lower surface of the tip of the dog 13 as shown in the figure. Since the upper end of the cutting blade 1 pushes up the dog 13 from the taper portion 16, the cutting blade 1 can be returned without any trouble.

Next, it is assumed that the cutting blade 1 has started descending for some reason even though the push button 9 has not been pressed down. At this time, the dog 13 does not move at all, so the dog 13 is on the descending passage of the cutting blade 1. Therefore, the tip side surface of the cutting blade 1 that has descended collides with the tip surface of the dog 13 and does not descend beyond this.

[0017]

[Effect of device]

 As described above, according to the present invention, unless the push button for controlling the drive of the cutting blade is lowered for that control, the cutting blade is prevented from descending, and the required safety is ensured. In addition to being able to maintain it, the structure for that is sufficient with a push rod that interlocks with the push button and a dog that is pushed by this push rod, and solenoids that drive the lock pin as in the past are completely unnecessary. Therefore, there is an effect that the configuration is downsized and simplified accordingly.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a perspective view with a part incised.

FIG. 2 is a front view of FIG.

FIG. 3 is a front view showing an operating state.

[Explanation of symbols]

 1 Cutting blade 8 Push button switch 9 Push button 11 Push rod 13 Dog 15 Spring

Claims (2)

[Scope of utility model registration request] 1. A push button switch for starting the driving of the cutting blade, a push rod which descends in association with the pressing movement of the push button switch, and a bias which is constantly biased by a spring so as to be positioned on the descending passage of the cutting blade. A safety device for a cutting machine, comprising: a dog that, when the push rod descends, is pushed by the push rod to be rotated against the elastic force of a spring to be removed from the descending passage. 2. The safety device for a cutting machine according to claim 1, wherein the push rod is directly connected to the push button of the push button switch.