JPH07148443A - Shredder - Google Patents

Abstract

PURPOSE:To provide a means to solve a problem in which paper pieces, which were cut by cutters and intruded behind the cutters along the rotary shaft of the cutters, are accumulated between guide plates to lay load on the rotation of the cutters in a shredder in which paper sheets inserted from the slit of a main body case are cut into pieces. CONSTITUTION:In a shredder in which paper sheets inserted from the slit 13 of a main body case 11 are cut into pieces by cutters 15 rotating around a rotary shaft 14, an opening 24 which exposes the cutters 15 partly is formed in the back of a guide plate 16 which is installed between the cutters 15 and guides paper pieces downward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shredder for rotating a cutter to finely cut paper.

[0002]

2. Description of the Related Art Shredders used in offices or the like are designed so that when a paper is inserted through a slit formed in the upper surface of a main body case, the paper is cut into small pieces by a cutter that is arranged below the slit and rotates at high speed. It has become. The conventional shredder will be described below.

FIG. 4 is a sectional view of a conventional shredder in the vicinity of a cutter. Two rotary shafts 1 are arranged in parallel with each other inside a main body case (not shown), and cutters 2 are provided at a pitch on the rotary shaft 1. Further, between the cutters 2 is provided a guide plate 3 for guiding the waste paper cut by the cutter 2 downward. The guide plate 3 is fitted to the rotary shaft 1 so that the inner edge thereof holds the rotary shaft 1, and the edge 4 is fitted to the rotary shaft 1.
By bringing the waste paper adhering to the rotary shaft 1 away from the rotary shaft 1 by this edge 4,
It is designed to fall in the direction of arrow A. Reference numeral 5 is a stay for fixing the guide plate 3.

Therefore, when the paper 8 is inserted from above, the paper 8 is finely cut by the cutter 2, and the cut paper waste is discharged downward along the guide plate 3 as indicated by an arrow A.

[0005]

However, all of the cut scraps are not discharged downward as shown by arrow A, and a part of them is behind the cutter 2 along the rotary shaft 1 as shown by arrow B. It goes around and gradually accumulates between the guide plates 3. And the accumulated waste paper gradually becomes a state of being compressed and pressed,
There has been a problem that the cutting load of the cutter 2 is reduced due to the rotation load of the cutter 2, and eventually the rotation of the cutter 2 becomes impossible.

Therefore, an object of the present invention is to provide a highly reliable shredder free from paper jams.

[0007]

To this end, the present invention provides a shredder in which a paper inserted through a slit of a main body case is finely cut by a cutter that rotates about a rotation axis. An opening for partially exposing the cutter is formed on the back surface of the guide plate that is provided to guide the waste paper downward.

[0008]

According to the above construction, since the waste paper that has turned around behind the cutter along the rotary shaft of the cutter is discharged downward from the opening of the guide rail, the paper jam behind the cutter can be reliably eliminated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the drawings. FIG. 1 is a perspective view of a shredder according to an embodiment of the present invention, and FIG. 2 is a sectional view of the same. Reference numeral 11 denotes a main body case, which is installed on the cabinet 12. A dust box (not shown) is housed inside the cabinet 12 so as to be freely taken in and out. A slit 13 for inserting paper is opened on the upper surface of the main body case 11. Slit 1
A pair of rotating shafts 14 are arranged below the member 3 in parallel with the slit 13. A cutter 15 is provided on the rotary shaft 14 at a pitch, and a guide plate 16 is provided between the cutters 15 and 15. The rotary shaft 14 and the cutter 15 may be mounted or integrated. Both ends of the rotary shaft 14 are rotatably supported by chassis 17 standing on both sides in the main body case 11. Reference numeral 18 is a stay bridged between the chassis 17 and the chassis 17, and the guide plate 16 is fixed to the stay 18.

In FIG. 1, a motor 19 is mounted on the inner surface of one chassis 17, and the rotation of the motor 19 is controlled by the sprocket 2 arranged on the outer surface of the chassis 17.
0, the chain 21, and the sprocket 22 are transmitted to the one rotating shaft 14, and the gear 23 and the like are transmitted to the other rotating shaft 14.

Next, the arrangement structure of the guide plate 16 will be described. FIG. 3 is a sectional view around the cutter of the shredder according to the embodiment of the present invention. The guide plate 16 is fitted on the rotary shaft 14 so as to hold the rotary shaft 14.
The back of the guide plate 16 is fixed to the stay 18, and the guide plate 16 is loosely fitted to the rotary shaft 14 so as not to hinder the rotation of the rotary shaft 14. In addition, the guide plate 16
The opening 24 is opened so that the back of the cutter 15 is largely recessed, and the back of the cutter 15 is partially exposed from the opening 24. Further, in FIG. 2, the guide plate 16
The distance L between the side wall and the side wall is longer than the length of the cut waste paper. The guide plate 16 peels off the waste paper adhering to the rotary shaft 14 from the rotary shaft 14 by the edge 25 thereof similarly to the conventional example shown in FIG.

The shredder is constructed as described above. Next, a method of cutting paper will be described. When the paper 8 is inserted through the slit 13 of the main body case 11 shown in FIG. 2, the paper 8 is introduced between the cutters 15 as shown in FIG. Then, the paper 8 is finely cut by the cutter 15,
The cut waste paper falls in the direction of arrow A along the guide surface of the guide plate 16. In this case, all the cut scraps are not discharged downward as indicated by arrow A,
A part of it moves in the direction of rotation of the rotary shaft 14 as shown by the arrow B, and wraps around behind the cutter 15, but the waste paper that has turned around behind falls downward from the opening 24 of the guide plate 16. Therefore, unlike the above-mentioned conventional example, the paper waste does not accumulate between the guide plates 16.

Further, in this case, by ensuring a large space L as in the present embodiment, it is possible to surely drop the paper waste downward so that it does not collect between the guide plate 16 or the stay 18 and the side wall. You can If the interval L is shorter than the length of the cut waste paper, the waste paper may be accumulated between the guide plate 16 and the side wall to cause a paper jam.
Is large, it is desirable to make this interval L as small as possible without causing a paper jam. The distance L is optimally the same as the cut waste paper length.

[0014]

As described above, according to the present invention, the paper inserted from the slit of the main body case is finely cut by the cutter rotating about the rotation axis, and the shredder is disposed between the cutters. The back of the guide plate that guides the scraps downward is formed with an opening that partially exposes the cutter, so the scraps that wrap around the back of the cutter along the axis of rotation will come out of the guide rail opening. Since the paper is discharged downward, the occurrence of paper jam behind the cutter can be eliminated, and the paper can be cut by the smooth rotation of the cutter.

[Brief description of drawings]

FIG. 1 is a perspective view of a shredder according to an embodiment of the present invention.

FIG. 2 is a sectional view of a shredder according to an embodiment of the present invention.

FIG. 3 is a sectional view around a cutter of a shredder according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view around a cutter of a conventional shredder.

[Explanation of symbols]

 11 Body Case 12 Cabinet 13 Slit 14 Rotating Shaft 15 Cutter 16 Guide Plate 17 Chassis 18 Stay 19 Motor 20, 22 Sprocket 21 Chain 24 Opening

Claims (1)

[Claims] 1. A main body case having a slit for inserting paper on an upper surface thereof, a pair of rotary shafts arranged below the slit in parallel with each other, a motor for rotating the rotary shaft, and the rotary shaft. A cutter provided with a pitch at
A shredder provided between the cutter and a guide plate for guiding the paper pieces cut by the cutter downward, wherein the cutter is partially exposed on the back surface of the guide plate. A shredder characterized by having an opening formed therein.