JPH052388B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a document shredding device, and more particularly to a document shredding device that can reduce noise and improve shredding performance.

[Technical background of the invention and its problems]

A document shredding device for shredding documents, etc. generally includes a casing having an input port into which documents, etc. are input;
It is provided with two rows of cutters arranged in a casing and consisting of a pair of shredding cutters arranged opposite each other so as to be in sliding contact with each other. Documents, etc. are now being infiltrated and shredded.

In this kind of document shredding work, while documents are being shredded, the shredding noise from the cutter row is propagated outside the casing through the input port, which generally creates a harsh noise in the office where the document shredding equipment is installed. often occur.

In addition, depending on the paper quality of documents, etc., the number of sheets stacked, the stacking state, etc. of the documents, etc. that are input, there may be variations in the amount of documents, etc. that the shredding cutter receives, causing wrinkles in the documents, etc., making the noise even higher. This may increase the shredding load and deteriorate shredding performance.

[Purpose of the invention]

The present invention has been made in consideration of these points, and an object of the present invention is to provide a document shredding device that can reduce noise during shredding and improve shredding performance.

[Summary of the invention]

The present invention relates to a casing having an input port into which documents, etc. are input, two rows of cutters disposed within the casing and having a pair of shredding cutters arranged facing each other so as to be in sliding contact with each other, and the input port. and 2
a pair of rollers rotatably disposed in parallel with the two cutter rows and close to each other between the two cutter rows; a rotation drive mechanism for rotating the pair of rollers; and a rotation drive mechanism for rotating the pair of rollers; and a rotation direction switching mechanism for switching the rotation direction of the pair of rollers, and when the two cutter rows rotate in the forward direction, the pair of rollers rotate in the forward direction at a circumferential speed slower than the circumferential speed of the two cutter rows. , the document shredding device is characterized in that when the two cutter rows rotate in reverse, the circumferential speed of is reversely rotated faster than the peripheral speed of the two cutter rows.

According to the present invention, since the pair of rollers are arranged close to each other during shredding, the propagation of the shredding noise generated from the two cutter rows is suppressed, and the noise of the document shredding device is reduced. can be reduced. In addition, when the two cutter rows rotate forward (shredding operation), the circumferential speed of the pair of rollers is slower than the circumferential speed of the two cutter rows. It is possible to apply tension to documents, etc., prevent them from wrinkling, reduce noise generation, and improve shredding performance.
On the other hand, when the two cutter rows rotate in reverse (discharge operation), the circumferential speed of the pair of rollers is faster than the circumferential speed of the two cutter rows, so there is no paper between the two cutter rows and the pair of rollers. The discharge operation can be performed quickly without causing any stagnation.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 are diagrams showing an embodiment of a document shredding device according to the present invention. Reference numeral 11 in the figure
1 is a casing of a document shredding device, and the upper end surface of this casing 11 is opened with an input port 13 into which documents and the like are input. In the casing 11 below the input port 13, two cutter rows 15 are disposed, each consisting of a pair of shredding cutters 15a, 15b arranged facing each other so as to be in sliding contact with each other. Between the two cutter rows 15 and the input port 13, a pair of rollers 16a and 16b are rotatably disposed close to each other and parallel to the two cutter rows. A motor 17 with a gear reducer that rotationally drives the cutter row 15 is provided in the casing 11, and a waste box 1 in which shredded waste is dropped and stored.
9 is installed below the cutter row 15.

FIG. 3 is a partial side view showing an example of a rotation drive mechanism for rotating the pair of rollers 16a, 16b, and a rotation direction switching mechanism for switching the rotation direction of the pair of rollers, and FIG. This is a perspective view.

In FIGS. 3 and 4, the reference numeral 21 is fitted to the rotating shaft 25 of one of the two cutter rows, for example, the cutter row 15a,
This cutter gear has approximately the same circumference as the cutter row 15a. In addition, the rotating shaft 2 of the cutter row 15a
5 includes an arm 22 having a substantially isosceles triangular shape.
is attached so that it can swing around the rotating shaft 25 by loosely fitting its top onto the rotating shaft 25. Furthermore, a forward rotation idler gear 23a and a reverse rotation idler gear 23b, which are always engaged with the cutter gear 21, are rotatably attached to the other ends of the arm 22. A pair of rollers 16
A forward rotation drive gear 24a and a reverse rotation drive gear 24b are fitted to the rotating shaft of one of the rollers a and 16b, for example, the roller 16a, at intervals in the axial direction. The drive gear 24a for normal rotation has a larger circumference than the roller 16a, and is disposed at a position where it can mesh with the idler gear 23a for normal rotation. Further, the reversing drive gear 24a has a smaller circumference than the roller 16a, and the reversing idler gear 23a has a smaller circumference than the roller 16a.
It is arranged at a position where it can mesh with b.

Next, the operation of this embodiment having such a configuration will be explained.

In the document shredding device, cutter rows 15a and 15b are rotated in the forward direction (third
The shredding work is performed by being rotationally driven in the direction of arrow L1 in the figure. In this case, the arm 22 loosely fitted to the rotation shaft 25 of the cutter row 15a is
As the cutter row 15a is rotated in the forward rotational direction, it is swung in the forward rotational direction as the cutter row 15a is rotated in the forward rotational direction. Then, arm 22
A forward rotation idler gear 23a attached to one tip of the forward rotation drive gear 24a is meshed with the forward rotation drive gear 24a. For this reason, the forward rotation of the cutter row 15a is
Cutter gear 21, forward rotation idler gear 23a,
It is transmitted to the roller 16a via the forward rotation drive gear 24a, and this roller 16a rotates in the forward rotation direction. A document or the like input from the input port 13 is held between a pair of rollers 16a and 16b that are close to each other, and is moved in the direction of the cutter row 15 while rotating the roller 16b as the roller 16a rotates. Thereafter, the inserted document etc. is bitten into the space between the rows of cutters 15 which are driven to rotate, and is continuously shredded by the pair of cutters 15a and 15b, and falls into the waste box 19.

In this case, the cutter gear 21 is the cutter row 15
It has approximately the same circumference as a, and the forward rotation drive gear 2
4a has a larger circumferential length than the roller 16a, the circumferential speed of the roller 16a is faster than the cutter row 15a.
It becomes slower than the circumferential speed of For this reason, the document, etc. that has been inserted is in a state of tension between the pair of rollers 16a, 16b and the two cutter rows 15, and tension is applied to the document, etc. This prevents the document, etc. from wrinkling, and allows the document, etc. to be cut into the cutter row 15 well.

Further, since the pair of rollers 16a, 16b are located close to each other, the input port 13 is cut off by the pair of rollers 16a, 16b, and the noise generated from the cutter row 15 is transmitted to the input port 13.
3 to the outside of the casing, and can prevent dust generated during shredding from flying to the input port 13 and its surroundings.

On the other hand, when discharging documents etc. that have been thrown in due to a paper jam, etc., the cutter rows 15a and 15b are rotated in the reverse rotation direction (direction of arrow L2 in Fig. 3) by the motor 17 with gear reduction gear, contrary to the direction during shredding. Driven. Then, the arm 22 that is loosely fitted to the rotation shaft 25 of the cutter row 15a has an appropriate frictional force with the rotation shaft 25, so that the cutter row 15
As a is rotated in the opposite direction,
A reversing idler gear 23b swung in the reverse rotation direction and attached to the other end of the arm 222
is meshed with the reverse rotation drive gear 24b. Therefore, the reverse rotation of the cutter row 15a is transmitted to the roller 16a via the cutter gear 21, the reverse rotation idler gear 23b, and the reverse rotation drive gear 24b, and this roller 16a rotates in the reverse rotation direction.
Documents etc. discharged from the cutter row 15 are transferred to the rollers 16 by reverse rotation of the cutter rows 15a and 15b.
Move to. After that, the document etc. is transferred to a pair of rollers 16.
a and 16b, and as the roller 16a rotates, the roller 16b is rotated,
It is discharged to the outside of the input port 13.

In this case, the cutter gear 21 is the cutter row 15
Since the reversing drive gear 24b has a smaller circumferential length than the roller 16a, the circumferential speed of the roller 16a is faster than the circumferential speed of the cutter gear 15a. As a result, documents, etc. are discharged from the rollers 16 faster than they are discharged from the cutter row 15, so that no debris remains between the cutter row 15 and the rollers 16.

Note that in this embodiment, the pair of rollers 16
An example is shown in which the cutter gear 21, the arm 22, the idler gear 23, and the drive gear 24 are used as a rotational drive mechanism for rotating the rollers 16a and 16b and a rotational direction switching mechanism for switching the rotational direction of the pair of rollers 16a and 16b. However, as this rotational drive mechanism and rotational direction switching mechanism, for example, the roller 16a is rotated by a power source independent from the cutter row 15a, and the roller 16a is rotated by a power source independent from the cutter row 15a.
It is possible to adopt a configuration in which the direction of rotation of a is switched by operating a clutch. Further, in this embodiment, an example was shown in which the rotation of the cutter row 15a is transmitted only to the roller 16a, but the roller 16a, the roller 16
It is also possible to adopt a mechanism that transmits rotation to both of b. Further, in this embodiment, gear transmission is used as the rotation transmission means, but belt transmission may also be used, for example.

〔Effect of the invention〕

As explained above, according to the present invention, by cutting the input port using a pair of rollers,
It is possible to prevent the propagation of the shredding noise generated from the cutter row during shredding, and reduce the noise of the document shredding device. Furthermore, the shredded edges of the pair of rollers prevent dust generated during shredding from scattering around the input port and its surroundings.

By applying tension to documents, etc., while shredding documents, etc., wrinkles can be prevented, an increase in shredding load, an increase in noise, etc. can be prevented, and shredding performance can be improved. Further, while discharging documents, etc., the documents, etc. to be discharged are discharged from the rollers faster than the cutter row, so that there is no accumulation of debris between the rollers and the cutters.

[Brief explanation of drawings]

1 to 4 are views showing an embodiment of the document shredding device according to the present embodiment, in which FIG. 1 is a sectional view thereof, FIG. 2 is a sectional view taken along the line of FIG. 1, and FIG. 3 is a sectional view thereof. FIG. 4 is a partial sectional view showing an example of a rotational drive mechanism and a rotational direction switching mechanism of the roller, and FIG. 4 is a view taken along the line in FIG. 3. 11...Casing, 13...Inlet, 15...
...Cutter row, 16a, 16b...Roller, 21
...Cutter gear, 22...Arm, 23a...
Forward rotation idler gear, 23b... Reverse rotation idler gear, 24a... Forward rotation drive gear, 24b... Reverse rotation drive gear, L1... Line indicating the forward rotation direction, L
2...A line indicating the direction of reverse rotation.

Claims (1)

[Scope of Claims] 1. A casing having an input port into which documents, etc. are input; and two rows of cutters disposed within the casing, each consisting of a pair of shredding cutters arranged facing each other so as to be in sliding contact with each other. ; between the input port and the two cutter rows;
a pair of noise cutter and cutting rollers rotatably disposed close to each other in parallel with the two cutter rows; a rotational drive mechanism for rotating the pair of noise cutter and cutting rollers; a rotational direction switching mechanism for switching the rotational direction of the noise cutting roller; and when the two cutter rows rotate forward;
When the pair of noise cutting rollers are rotated forward at a circumferential speed slower than the circumferential speed of the two cutter rows and the two cutter rows are rotating in reverse, the pair of noise cutting rollers a control mechanism that controls the rotational drive mechanism and the rotational direction switching mechanism so that the circumferential speed of the cutter is reversely rotated at a circumferential speed faster than the circumferential speed of the two cutter rows.