JPH0970553A - Stop switch for rotary cutter of shredder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely stop the rotation of a rotary cutter in an emergency by installing a switch plate of large area on about the same surface as a top plate of a shredding part and installing a microswitch which is operated by the descending of the switch plate and for stopping a rotary cutter at a position just below the switch plate. SOLUTION: In a shredder, a rotary cutter is started by the on action of a forward switch 9, and is reversely rotated by a backward switch 10. Further, by the on action of a stop switch 11, the rotary cutter is stopped. The stop switch 11 is provided with a support body on the sure side. To the tip of an operating stick freely rotatably supported on the support body, a switch plate 21 is fitted, and it is energized by a leaf spring 24 fixed to the top plate 7 inside its front end part. A microswitch 25 supported by a fixed plate 26 is installed below the switch plate 21, and by the on action of the switch 25, the rotation of the rotary cutter is immediately stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shredder operation switch for shredding unnecessary documents and the like, and more particularly to a stop switch for quickly and safely stopping a rotary blade of a shredder in an emergency.

[0002]

2. Description of the Related Art In a conventional general shredder, three types of switches are used as operating switches: a forward (shred) switch, a reverse switch, and a stop switch. That is, the paper to be shredded is automatically shredded by inserting it into the input port, or by pressing the forward rotation switch, the shredding cutter (rotary blade) inside rotates to shred the paper. Further, if a paper jam or the like occurs during the shredding, pressing the reverse switch causes the rotary blade to rotate in the reverse direction to eject and remove the paper. On the other hand, the stop switch stops the rotating rotary blade after shredding documents or in some emergency. Most of these switches are arranged near the paper insertion port on the top plate of the shredded part, and push the switch buttons unified in design to have the same size and height into the top plate. It was pushed down like this. Then, the function is displayed only by the characters near the switch, and the function is simply displayed by the pattern and color of the switch button head.

[0003]

However, since the paper inlet is relatively wide, there is a possibility that the user's clothes, necktie, etc. may be caught in the rotating rotary blade due to inexperience or inattention in the operation. In such a case, it is very difficult to press the small stop switch buried in the top plate. In other words, the user is in an unexpected accident and cannot immediately and calmly judge which switch button is the stop switch, and furthermore, he cannot put the fingertip on the switch button head and push it into the top plate. is there.

In order to prevent this, for example, the actual fairness 1-6
As proposed in No. 918, it is proposed to make the switch operation simple by making only the stop button higher than other operation switches and projecting only the push button with respect to the top surface of the body. ing.

However, even in such a switch structure, the user has to press a stop button of the same size as the fingertip with an open hand or fingertip in an emergency, so that the user who is rushed can surely rotate the rotary blade. Was still difficult to stop.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary blade stop switch that can reliably stop the rotation of the rotary blade in such an emergency, and it is widely urged upward in a wide range. By providing a switch plate of an area on substantially the same plane as the top plate of the shredded part, and by providing a micro switch at any position immediately below this switch plate to stop the rotary blade by operating by the lowering of the switch plate, It is a solution to the problem.

Further, a switch plate having a larger area than other switches is attached to the tips of a pair of operating rods rotatably supported by supports provided respectively at the center portions on both sides inside the top plate of the shredded portion. , This switch plate is supported by urging it upward with a wide plate spring fixed to the top plate, and at the arbitrary position just below the switch plate, it is activated by the switch plate being lowered to stop the rotary blade. Was used.

Further, springs are erected at a plurality of positions on the lower surface of the switch plate having a larger area than those of the other switches via guide shafts to support the switch plate so that the switch plate can move up and down. A means of providing a microswitch which stops the rotary blade by being operated by lowering the switch plate at an arbitrary position was also used.

In the stop switch, a plurality of micro switches are provided, and the rotary blade is stopped by the operation of any one of the micro switches by the OR logic.

In the rotary blade stop switch of the present invention having the above-described structure, the area of the switch plate urged in the upward direction is widened so that even in an emergency, the switch plate can be manually operated without being aware of the position of the switch plate. The switch plate is lowered by a slight movement of the body or body, and the micro switch inside operates to reliably stop the rotary blade.

The actuating rod and leaf springs or springs provided at a plurality of positions support the switch plate so that it can move up and down while urging the switch plate upward, and the slight movement of the hand or body is transmitted to the microswitch. It activates the switch. Further, in such a case, if any one of the plurality of micro switches is operated by the OR logic, the rotary blade is stopped to ensure the operation.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a stop switch for a rotary blade of a shredder according to the present invention will be described in detail below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a shredder, which has a shredding portion 2 provided with a shredding mechanism such as a rotary blade, an assembly-type frame frame 3 provided below the shredding portion 2, Draw-out scrap box 4 that fits into the frame 3
And a storage drawer 5. A caster 6 is provided at the lower end of the frame 3 for movement. In addition, the top plate 7 of the shredder 2 is provided with a forward rotation switch 9 and a reverse rotation switch 10 in the vicinity of the paper insertion port 8 and covers the entire width of the front side portion of the top plate 7 from the same plane as the top plate 7. The stop switch 11 having the switch plate 21 having a larger area than the other switches tilted to the lower front is provided.

A conventionally known control circuit (not shown)
As a result, the rotary blade is started by the ON operation of the forward rotation switch 9 to start shredding, and the rotary blade is rotated in the reverse direction by the reverse rotation switch 10 to eliminate paper jams and the like. The stop switch 11 stops the rotary blade when it is turned on.

In the event that a part of clothes, a tie, or the like is caught in the rotary blade due to carelessness or the like, even if an unexpected accident occurs, the user can switch the switch. Without being aware of the position, simply pressing the front part of the top plate 7 with a flat hand or a part of the body causes the stop switch 11 to operate reliably and the rotation of the rotary blade to stop, avoiding danger. You can do it. That is, since the area of the switch plate 21 of the stop switch 11 is extremely large as compared with the other switches 9 and 10, and is provided along the front side,
Instead of pushing the button into the top plate as in the past,
This is because the switch is activated by hitting the front part from above. Further, since it is provided so as to be inclined forward, the hand can move in the direction in which the hand slides along the inclined surface regardless of the pressing direction of the hand, and the operation of the switch can be completed.

Next, FIGS. 2 to 4 show an example of the internal structure of the rotary blade stop switch. In the figures, 21 is a switch provided on the front side of the top plate 7 of the shredder 2. It is a plate that has a width substantially the same as the width of the front side of the top plate 7 and has an extremely wider area than the other switches 9 and 10, and is inclined forward from the same plane as the top plate 7. is there.
Supports 2 are provided on both sides of the center of the top plate in the longitudinal direction.
2 and 22 are provided, and the switch plate 21 is attached to the tips of the arm-length actuating rods 23 and 23 rotatably supported. A broad leaf spring 24 is fixed to the inside of the front end of the top plate 7, and supports the switch plate 21 by urging it upward from the back side. Therefore, the operating rod 23 of the long arm
The plate spring 24 causes the switch plate 21 to move up and down while maintaining a substantially horizontal position. In this case, since the switch plate is supported by the wide leaf spring 24, the whole of the switch plate 21 is uniformly lowered even if any part of the switch plate 21 is pushed down, and the following micro-switch operates even with a slight displacement. Together with the switch, it reliably operates as a stop switch.

Reference numeral 25 is a micro switch supported by a fixed plate 26 below the switch plate 21, and constitutes a part of a power supply circuit or a control circuit (not shown). The rotation of the blade 29 is immediately stopped. 27 is a micro switch 25
When the switch plate 21 is pushed down, the spring 28 provided so as to project on the back surface of the switch plate 21 descends to turn on the micro switch 25. The spring 28 also has a cushioning function to prevent an excessive load from being applied to the micro switch 25. A motor 30 drives a pair of rotary blades 29.

Next, FIGS. 5 and 6 show another embodiment of the rotary blade stop switch according to the present invention. In the drawings, 31 is a spring, and a plurality of locations (in the drawings, 31) are springs on the lower surface of the switch plate 21. The switch plate 21 is supported by a pair of upper and lower guide shafts 32 at four positions). Then, when the switch plate 21 is pushed down, the actuating protrusion 33 provided on the lower surface of the switch plate 21 depresses the actuating piece 27 of the microswitch 25 to actuate the microswitch 25 and stop the rotary blade.

When the switch plate 21 is supported as in this example, when the end of the switch plate 21 is pushed down, the switch plate 21 tilts and descends, and the operating piece 27 cannot be pushed down sufficiently. The switch 25 may not operate.
Therefore, it is desirable to provide at least two or more microswitches as shown in the figure, and to stop the rotary blade if any one of the microswitches operates by the OR logic.

Needless to say, the rotary blade stop switch according to the present invention can be applied not only to the shredder of the above-described embodiment but also to all types of shredders.
Further, the position where the switch plate 21 is provided is not limited to the above-described embodiment, and may be provided on the front side of the paper input port or on the left or right side part depending on the form of the shredder and the positional relationship with the paper input port. Is possible. in short,
Stop switch with extremely wide switch plate area 2
The gist is to provide along any one of the sides.

[0020]

As described above, according to the stop switch of the shredder according to the present invention, since the area of the switch plate is extremely large, even in an emergency, the position of the stop switch is not taken into consideration, and the hand and the body are slightly touched. With such a motion, the rotary blade can be reliably operated and the rotary blade can be stopped.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a shredder having a rotary blade stop switch according to the present invention.

FIG. 2 is a plan view of a shredded portion.

FIG. 3 is a partial cross-sectional view explaining the operation of the stop switch.

FIG. 4 is a partially enlarged view of a micro switch part.

FIG. 5 is a partial plan view showing another configuration example of the stop switch.

FIG. 6 is a partial sectional view of FIG. 5;

[Explanation of symbols]

 2 Shredded part 7 Top plate 11 Stop switch 21 Switch plate 22 Support 23 Actuating rod 24 Leaf spring 25 Micro switch 31 Spring 32 Guide shaft

Claims (4)

[Claims] 1. A switch plate having a large area which is constantly urged upward is provided on substantially the same plane as the top plate of the shredded portion, and the switch plate is operated at an arbitrary position immediately below the switch plate by lowering the switch plate. A switch for stopping the rotary blade of a shredder, which is provided with a micro switch for stopping the rotary blade by means of a shredder. 2. A switch plate having a larger area than other switches is attached to the tips of a pair of actuating rods rotatably supported by supports provided on both sides central portions on the inner side of the top plate of the shredded portion. The switch plate is supported by a wide plate spring fixed to the top plate by urging it upward, and at the arbitrary position immediately below the switch plate, the switch plate is lowered to stop the rotary blade. A switch for stopping the rotary blade of a shredder characterized by having a switch. 3. A switch plate is erected movably up and down via a guide shaft at a plurality of positions on the lower surface of the switch plate having a larger area than that of other switches, and is directly under the guide plate. A switch for stopping a rotary blade of a shredder, which is provided with a micro switch that is operated by a lowering of a switch plate to stop the rotary blade at an arbitrary position of. 4. The stop of the rotary blade of the shredder according to claim 2 or 3, wherein a plurality of microswitches are provided, and the rotary blade is stopped by the operation of any one of the microswitches by OR logic. switch.