JPH0646507Y2 - Document shredder - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a document shredder for shredding documents, drawings, etc. (hereinafter referred to as documents) to be discarded, and particularly to a built-in waste box. It is equipped with a device that automatically disintegrates the scrap pile of fine fragments.

[Conventional technology]

In recent years, many document shredders have been used to shred documents vertically and horizontally. This method improved the bulk of the shredded paper pieces and increased the substantial capacity of the waste bin.

However, since the position and direction of shredded paper pieces ejected from the cutter are generally constant, the scrap pile of shredded paper pieces is concentrated at a certain place in the waste box and stands up like a thin wall. Collect in. If this is left as it is, its top will eventually cross the upper end of the waste box and come into contact with the cutter.
Therefore, a switch that operates when the top of the scrap pile approaches the cutter is installed, and when the switch is turned on, the rotation of the cutter is stopped. Then, manually pulling out the scrap box and shaking it to break up the scrap pile, level it, and operate the cutter again.

However, with this, as the amount of shredded paper pieces in the waste box increases, the operation interval of the switch that detects the top of the waste pile becomes shorter, and the user frequently opens the door and pulls out the waste bin to manually remove the waste pile. It is extremely difficult to use because you have to push it in to flatten it, then close the door and turn on the start switch.

As a countermeasure against this, a method of horizontally swinging the paper piece discharge port so that the shredded paper pieces discharged from the cutter are evenly shaken in the waste box is considered, but the shredding is always performed continuously. It is not a thing, and the scrap pile of paper pieces may be biased, which is not perfect.

Therefore, it is conceivable to automatically disintegrate the scrap pile of fine fragments and forcibly compress them.

A conventional document shredding machine of this type is, for example, Shoukaisho 64-4.
Some are presented in the 4040 publication. This is a box rotating means for rotating and driving a waste box housed in the document shredder body, and a box up-and-down moving means for interlocking with the rotation of the box rotating means to vertically vibrate the entire waste box uniformly. It is the one with and.

The scrap pile of shredded paper pieces formed in the scrap box is destroyed by the centrifugal force applied by the box rotating means, and the whole scrap box is vertically vibrated uniformly by the box moving means to compress the shredded scrap downward. , We are trying to improve the storage capacity of shredded waste.

[Problems to be solved by the device]

However, in the above-described conventional example, the structure is configured such that the destruction of the scrap pile by the centrifugal force of the box rotation and the compression of the shredded scrap due to the uniform vertical vibration of the entire box are separately shared. Becomes complicated. That is, specifically, in order to interlock box rotation and box up-and-down movement, the rotary shaft and bearing are splined, a rotary plate is provided in the document shredder body, and a cam for moving the rotary plate up and down is provided. The drive mechanism has a complicated structure in which bevel gears are combined, and there is a problem in that manufacturing, handling, maintenance, and the like are time-consuming and costly.

Also, since the cutter box is constantly rotated and vertically vibrated while the cutter is rotating (during cutting work), there is a problem that noise during use is large and durability of the device is significantly impaired. It was

Therefore, the present invention has been made by paying attention to the above-mentioned conventional problems, and the purpose thereof is that the structure is simple,
Another object of the present invention is to provide a document shredding machine equipped with means for automatically performing effective demolition and compression without the need for continuous operation during cutting work.

[Means for Solving the Problems]

The present invention relates to a document shredder including a cutter, a cutter driving device, and a waste box inside the document shredder body, and a position where the shredded paper piece discharge position of the cutter is deviated laterally from the center of the waste box. In addition, a seesaw drive device having a fulcrum means for supporting the bottom of the waste box and a vertical movement means for the waste box is provided, and the fulcrum means is provided under the scrap pile of shredded paper pieces formed in the scrap box. The waste box is supported by a box so that the waste box can be moved in a seesaw manner, and the vertical movement means is located at a position biased from the center of the waste box to the side opposite to the fulcrum means, and It is configured by using a cam that raises the biased position at a low speed and descends at a high speed.

[Action]

When the scrap box itself inside the document shredder is moved in a seesaw motion, the shredded paper pieces in the scrap pile are accelerated in the horizontal and vertical directions (G).
Is added, the scrap pile automatically collapses and is leveled, and at the same time, is compressed downward. It has been confirmed by experiments that the optimum position of the fulcrum of this seesaw motion is at the bottom of the scrap box and directly below the top of the scrap pile, as described later.

As the timing of the seesaw exercise, when the summit of the scrap mountain reaches the upper limit, it may be performed several times. Therefore, only intermittent operation is performed at intervals during the cutter work, and there is no problem in terms of noise and durability.

In addition, the drive mechanism need only be a simple vertical swing mechanism.
It is inexpensive and easy to handle and maintain.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a vertical sectional side view of an embodiment of the present invention, and FIG. 2 is a schematic view showing the operation of the main part thereof.

The box body of the document shredder main body 1 is divided into an upper drive unit 2 and a lower waste box storage unit 3. An input port 4 for a document or the like B to be shredded is provided on the upper surface of the drive unit 2, and a photosensor 5 as a detector for detecting the document or the like B is attached to the end of the input port 4. A cutter 6 composed of a pair of rollers having teeth that mesh with each other is rotatably attached at a position diagonally below the insertion port 4. The cutter 6 is connected to a geared motor 7 which is, for example, a cutter driving device through a gear train 8, and is controlled by a control device 9 so as to be driven to rotate normally when shredded and reversely rotated when a paper jam occurs.

The partition 10 that separates the drive unit 2 and the waste box storage unit 3 is provided with a drop port 11 for a piece of paper shredded by the cutter 6, and a photo sensor 12 for detecting the top of the waste pile at the edge of the opening. Has been placed. In the case of the present embodiment, since the flight line of the paper piece shredded by the cutter 6 draws a parabola obliquely downward, the drop port 11 is located closer to the back side than the center line L of the document shredder body 1. It is provided.

A waste box 15 is stored in the waste box storage unit 3, and a door 16 is attached to the front surface. The floor surface 17 of the waste box storage portion 3 is the upper bottom, and the seesaw drive device 20 that moves the waste box 15 on the floor surface 17 in a seesaw motion.
Is provided.

The seesaw driving device 20 is composed of a vertically moving means 21 for vertically swinging the waste box 15 and a fulcrum means 22 for the seesaw movement. The up-and-down moving means 21 of the present embodiment includes an electric motor 23 attached to the lower surface of the floor surface 17, an eccentric cam 25 attached to the output shaft 24 of the electric motor 23, and the cam surface of the eccentric cam 25 to be brought into contact therewith to rotate the cam. A lever that repeats vertical linear movement with a predetermined amplitude in synchronization with
26 and. As the eccentric cam 25, for example, a so-called jumping cam is used which has a shape in which the lever 26 is relatively gradually pushed up and abruptly dropped.

On the other hand, the fulcrum means 22 is a round bar or a triangular bar fixed on the floor surface 17, and its mounting position is just below the top 31 of the scrap pile 30 formed in the scrap box 15 or in the vicinity thereof. The position. According to the experiment, the position where the front and rear lengths of the waste box 15 are divided into a ratio of approximately 1: 4 was recognized to be the most effective.

Reference numeral 29 is a stopper for preventing the scrap box 15 from being moved forward.

In addition, the control device 9 is provided with a circuit that starts the forward rotation of the geared motor 7 when the photo sensor 5 is turned on and shuts off the energization to the geared motor 7 a few seconds after the photo sensor 5 is turned off. Furthermore, when the photo sensor 12 is turned on, the electric motor 23 of the seesaw drive device 20 is started, and the lever
After 26 moves up and down a set number of times (for example, 5 times), a circuit that shuts off the electric power to the electric motor 23 if the photo sensor 12 is off, and a photo sensor even after the electric motor 23 is stopped.
If 12 is turned on, a circuit or the like is provided for judging that the waste box 15 is full and cutting off the power supply to the geared motor 7.

Next, the operation will be described.

When a document B or the like is inserted into the insertion port 4, the photo sensor 5 detects it, starts the geared motor 7, and the cutter 6 starts operating. The shredded paper pieces collect, the scrap pile 30 formed in the scrap box 15 gradually rises, and the photosensor 12 detects when the top 31 of the scrap box 15 reaches near the upper end of the scrap box 15. Photo sensor 12
When the detection signal is output from the electric motor 23, the electric motor 23 of the seesaw driving device 20 is energized and started, and the lever 26 repeats five vertical movements. Therefore, the front end portion of the waste box 15 has the fulcrum means 22.
The operation of being pushed up around and falling rapidly is repeated. That is, the waste box 15 itself performs a seesaw movement around the fulcrum means 22. As a result, as schematically shown in FIG. 2, a force F based on the horizontal and downward vertical acceleration is applied to the shredded paper piece of the scrap pile 30, and the scrap pile 30 is automatically collapsed to form a solid line H. Simultaneously flattened as shown while being compressed downwards.

The photo sensor 12 stops the output of the detection signal of the top 31 when the scrap pile 30 collapses, but the cutting operation is interrupted by delaying the energization of the cutter-driven geared motor 7 until a few seconds thereafter. You can continue continuously without.

Thus, until the shredded paper pieces in the waste box 15 are full,
The process shown in the figure is repeated. The peaks of the peaks in FIG. 3 represent the levels when detected by the photosensor 12, and the valley bottoms represent the levels when flattened.

When the level of waste in the waste box 15 reaches the full level H0, the photo sensor 12 continuously outputs a detection signal. That time,
When it is judged that the waste box 15 is full, the power supply to the geared motor 7 is automatically cut off, and at the same time, it is displayed that it is full.

Table 1 shows the fulcrum means 22 described above by the inventors of the present application.
It shows a part of the result of the experiment conducted to find the optimum position of.

In this experiment, the summit 31 of the scrap pile 30 is the length before and after the scrap box 15 (410 m
m) is divided into 1: 4 so that it is formed at a position closer to the rear. The position of the fulcrum means 22 of the seesaw drive device 20 is such that when one (case No. 1) is provided on the bottom surface directly below the top 31 of the scrap pile, the other (case No. 2) is located at the top 31 of the scrap pile. It was assumed that it was shifted about 45 mm from just below to the front. In each of these cases, the shredding and the seesaw movement of 5 reciprocations were repeated up to the fifth time while following the process shown in FIG.
Then, the total weight of the shredded paper pieces in the waste box was weighed after each end, and the larger the amount, the better the effect of the seesaw movement.

As a result, a difference of 0.2 to 0.3 kg was generated between the two cases each time, which is a considerable difference when the paper pieces are made to be bulky.

As described above, it was confirmed by experiments that the optimum position of the fulcrum of the fulcrum means 22 is the optimum position just below the top of the scrap pile at the bottom of the scrap box.

FIG. 4 shows another embodiment of the present invention.

In this embodiment, the floor surface 17 of the waste box 15 is slanted to support the fulcrum means 22.
Is different from the above embodiment. Other configurations and operations are similar to those of the first embodiment.

[Effect of device]

As described above, according to the present invention, the document shredder is provided with the seesaw driving device for performing the seesaw movement of the scrap box as a means for breaking the scrap pile. Therefore, it is possible to provide a low-cost document shredding machine that is easy to manufacture, handle, maintain, etc., because the pile of shredded scrap can be automatically broken and compressed with an extremely simple structure without rotating the box. Is obtained. Particularly, according to the present invention, since the shredded paper piece discharge position of the cutter is laterally offset from the center of the waste box, the scrap pile is located at the offset position, and the fulcrum means is provided directly below the waste pile, while the vertical movement means is provided. Is provided at a position opposite to the fulcrum means of the waste box, and a cam for raising and lowering the waste box at a low speed and descending at a high speed is used as the vertical movement means, so the waste mountain in the waste box is a valley. By collapsing to the moving means side, the scrap pile is efficiently flattened on the upper surface and simultaneously compressed downward.

In addition, the seesaw movement of the waste box needs to be performed only a few times each time the waste pile reaches the upper limit during the cutting work of documents, etc.
The noise is low and the durability of the device is not impaired.

[Brief description of drawings]

FIG. 1 is a longitudinal side view of the first embodiment of the present invention, FIG. 2 is a schematic diagram for explaining the operation of the main part thereof, and FIG. 3 is a diagram showing the change of the waste level in the waste box due to the operation. FIG. 4 is a vertical sectional side view of the second embodiment. 1 is a document shredding machine main body, 6 is a cutter, 7 is a cutter driving device, 20 is a seesaw driving device, 21 is a vertical moving means, and 22 is a fulcrum means.

Continuation of front page (56) References Showa 50-139484 (JP, U) Showa 61-64345 (JP, U) Showa 61-139740 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A document shredding machine comprising a cutter, a cutter driving device, and a waste box in a document shredding machine main body, in which the shredded paper piece discharge position of the cutter is laterally offset from the center of the waste box. A seesaw drive device having a fulcrum means for supporting the bottom of the waste box and a vertical movement means for the waste box is provided at the position, and the fulcrum means is provided directly below the pile of shredded paper pieces formed in the waste box. The scrap box is supported so that the scrap box can be moved in a seesaw manner, and the vertical movement means is located at a position offset from the center of the scrap box to the side opposite to the fulcrum means, and the bottom of the scrap box. 2. A document shredding machine, comprising: a cam that raises the biased position at a low speed and descends at a high speed.