JPH0513408Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a document shredding machine equipped with a compression roller that compresses shredded waste shredded by a shredding blade and discharges it toward a waste bin. be.

<Prior Art> In a conventional document shredding machine equipped with a compression roller, when the shredding blade is reversed due to a paper jam or the like, the compression roller is stopped.

<Problems to be Solved by the Invention> In the prior art described above, since the compression roller stops when the shredding blade is reversed, the shredded waste between the shredding blade and the compression roller flows back toward the document input port. As a result, there is a lot of shredded debris around the document input port, which requires a great deal of effort to clean.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a document shredding machine that can prevent shredded waste from flowing back into the document input port when the shredding blade is reversed, and that can simplify cleaning of the vicinity of the document input port.

<Means for solving the problem> The means for solving the problem according to the present invention are shown in Figures 1 to 4.
As shown in the figure, a rotary drive shredding blade 1 that shreds documents
and a rotationally driven compression roller 4 that compresses the shredded waste 2 shredded by the shredding blade 1 and discharges it in the direction of the waste box 3.
and a shredding blade drive device 5 for driving the shredding blade 1 in forward and reverse rotation, and a direction in which the shredded waste 2 is discharged in the direction of the waste box 3 when the shredding blade 1 rotates in the forward and reverse directions. A compression roller drive device 6 is provided for rotating the compression roller 4 at a faster speed than the shredding blade.

<Operation> In the above-mentioned problem solving means, when a paper jam or the like occurs in the shredding blade 1 during document shredding, the shredding blade drive device 5 reverses the shredding blade 1 and transfers the jammed document to the document input slot 8. Return to At this time, the compression roller drive device 6 rotates the compression roller 4 in the normal rotation direction and discharges the shredded waste toward the waste box. Therefore, it is possible to prevent shredded waste from flowing back into the document input port when the shredding blade is reversed, and cleaning around the document input port can be simplified.

<Example> Hereinafter, a first example of the present invention will be described based on FIGS. 1 to 4. Fig. 1 is a longitudinal side view of the document shredding machine of the present invention, Fig. 2 is an electric circuit diagram, Fig. 3 is a plan view of the shredding blade drive device, and Fig. 4 is a plan view of the compression roller drive device. It is.

As shown in the figure, the document shredding machine of the present invention includes a shredding blade 1 for shredding documents, and a compressor for compressing shredded waste 2 shredded by the shredding blade 1 and discharging it toward a trash box 3. The shredding blade 1 includes a roller 4 and a shredding blade drive device 5 that drives the shredding blade 1 in forward and reverse rotation.
A compression roller driving device 6 is provided which drives the compression roller 4 in a direction (normal rotation direction) in which the shredded waste 2 is discharged toward the waste box 3 during normal rotation and reverse rotation.

The shredding blade 1 is a pair of upper and lower rollers rotatably supported by the main body 7, and shreds a document inputted from a document input port 8 formed on the upper surface of the main body 7 into strips. .

As shown in FIGS. 1 and 3, the shredding blade drive device 5 includes a shredding blade drive motor 9, which is a capacitor run type induction motor, and is externally fixed to a rotor shaft 10 of the shredding motor 9. Small diameter sprocket 11,
A large-diameter sprocket 13 externally fitted and fixed to one rotating shaft 12 of the shredding blade 1, and a driving force transmission chain 14 wound around both sprockets 11 and 13.
and gears 16 and 17 that are externally fitted and fixed to the respective rotating shafts 12 and 15 of the chopping blade 1 on the side of the chopping blade 1 with respect to the large diameter sprocket 13 and meshing with each other. It is driven by an electric circuit as shown in the figure.

The compression roller 4 is a pair of upper and lower rollers rotatably supported by the rotating shaft of the main body 7, and is disposed downstream of the shredding blade 1, and is moved at a slightly higher speed than the shredding blade 1. Rotate.

As shown in FIGS. 1 and 4, the compression roller drive device 6 includes a compression roller drive motor 18, a sprocket 20 externally fitted and fixed to a motor shaft 19 of the compression motor 18, and one of the compression rollers 4. Sprocket 22 externally fitted and fixed to the rotating shaft 21 of
, a driving force transmission chain 25 wound around both the sprockets 20 and 22, and the sprocket 2.
Each rotating shaft 2 is closer to the compression roller 4 than 2.
gears 27 which are externally fitted and fixed to 1 and 26 and mesh with each other;
28, and similarly to the shredding blade drive device 5, it is driven by an electric circuit as shown in FIG.
23 and 24 are bearings.

As shown in FIG. 2, the electric circuit for driving the shredding blade drive device 5 and the compression roller drive device 4 includes a commercial AC power source 29, a power switch 30 connected to the commercial AC power source 29, and a power switch 30 connected to the commercial AC power source 29. A rectifier smoothing circuit 31 connected to the switch 30, a series connection body of a first relay 32 and a reverse key 33 connected to the output of the rectifier smoothing circuit 31, and a second relay connected to the output of the rectifier smoothing circuit 31. The power switch 3 is connected to the series connection body of the relay 34, the start key 35, and the stop key 36, and the commercial AC power source 29.
0 and a compression motor 18 connected in the same way.

A contact 32a of the first relay 32 is connected in parallel with the start key 35, and another contact 32b of the first relay 32 serves as a forward/reverse switch for the shredding motor 9.

Further, a contact 34a of the second relay 34 is connected in parallel with the start key 35, and other contacts 34b and 34c of the second relay 34 are connected in series with the shredding motor 9 and compression motor 18, respectively. There is.

The rectifying and smoothing circuit 31 also includes a rectifying diode 37, a smoothing capacitor 38, and a resistor 39.
40 and 41 are diodes for absorbing the reverse voltage generated from the coils of the relays 32 and 34.

In FIG. 1, 42 is a shredded waste guide plate disposed between the shredding blade 1 and the compression roller 4.

In the above configuration, the normal shredding operation will be explained first.

A user who wants to shred unnecessary documents first turns on the power switch 30 and presses the start key 35. Then, current flows through the second relay 34, and the contact 34a
is turned on, and the second relay 34 is self-held. At the same time, the contacts 34b and 34c are turned on, the shredding motor 9 and the compression motor 18 start rotating, and the shredding blade 1 and the compression roller 4 rotate. and,
When a document is inputted into the document input port 8, the document is shredded by the shredding blade 1, becomes shredded waste 2, and the guide plate 42
and is sent to the compression roller 4. here,
The shredded waste 2 is compressed and discharged into a waste box 3.

When the stop key 36, which is a normally closed switch, is pressed, the second relay 34 is de-energized and self-holding is released, so the second relay 34 is turned off and the shredding motor 9 and compression motor 18 are turned off. Stop.

Next, due to reasons such as a large amount of documents being input from the document input port 8 that exceeds the shredding capacity of the shredding blade 1,
A case where a paper jam occurs in the shredding blade 1 will be explained.

When a paper jam occurs, the user must press the reverse key 33.
Press to reverse the shredding blade 1 and remove the jammed paper.

That is, when the reverse rotation key 33 is pressed, the first relay 32 is energized, and the forward/reverse switching contact 32b of the shredding motor 9 is switched to the reverse direction. At the same time, the contact 32a connected in parallel to the start key 35 is also turned on.
The second relay 34 is self-held as in normal operation.

Then, the contacts 34b and 34c are turned on, and the shredding motor 9 and compression motor 18 start rotating.
At this time, the compression motor 18 rotates in the normal direction, but the shredding motor 9 rotates in the reverse direction because it is connected to the reverse side.

In this way, in the document shredding machine of the present invention, the compression motor 18 rotates in the normal direction even when the shredding motor 9 rotates in the reverse direction. It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

For example, the configurations of the shredding blade drive device 5 and the compression roller drive device 6 are not limited to those in the embodiment, and the electric circuits thereof are not limited to those shown in the figures.

That is, an overload detection circuit for the shredding motor 9 may be provided to automatically stop or reverse the shredding motor 9 when the occurrence of a paper jam is detected. Of course, at this time, the compression motor 18 is driven in the normal rotation direction.

Further, an automatic paper feeding device may be attached to the document input port 8, and a shredded waste dispersing device may be attached to the lower part of the compression roller 4.

<Effects of the invention> As is clear from the above explanation, according to the invention, the compression roller is rotated in the normal direction at a faster speed than the shredding blade when the shredding blade rotates forward and backward, so documents can be shredded. The shredded waste does not accumulate and clog the shredded waste guide plate portion between the shredding blade and the compression roller, and the shredded waste can be reliably discharged to the waste box. That is, it is possible to prevent shredded waste from flowing back into the document input port when the shredding blade is reversed, and there is an excellent effect that cleaning around the document input port can be simplified.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional side view of the document shredding machine of the present invention;
3 is a plan view of the shredding blade drive device, and FIG. 4 is a plan view of the compression roller drive device. 1...Shredder blade, 2...Shredded waste, 3...Scrap box, 4
... Compression roller, 5 ... Shredding blade drive device, 6 ...
Compression roller drive device, 7... Main body, 8... Document input port, 9... Shredding motor, 10... Motor shaft, 1
8... Compression motor, 33... Reverse key, 35...
Start key, 36...Stop key.

Claims (1)

[Scope of utility model registration request] A rotary-driven shredding blade that shreds documents; a rotary-driven compression roller that compresses the shredded waste by the shredding blade and discharges it toward the waste bin; and a shredding blade drive device that drives the compression roller at a faster speed than the shredding blade in a direction to discharge the shredded waste toward the waste box when the shredding blade rotates forward and backward. A document shredding machine characterized by being provided with a compression roller drive device.