JPH09132888A - Treating device for wastepaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treating device for wastepaper capable of preventing pieces of papers formed by crushing the wastepaper from staying between rotary blades and a frame not falling down. SOLUTION: This treating device for wastepaper is obtained by fixing rotary blades 3, 4 to a pair of rotary shafts 1, 2 so as to be positioned as an alternated arrangement, setting the rotating speed of the rotary blade 3 higher than that of the rotary blade 4, connecting the base end parts of leaf springs 14, 15 arranged along a plane passing through the center of the rotary shaft 1, to a frame 6 and a top lid 7, and facing the top ends of the springs to the outer periphery of the rotary blade 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating used paper, and more particularly to an apparatus for crushing used paper.

[0002]

2. Description of the Related Art Used paper used in offices is discarded or recycled. In order to dispose or recycle the waste paper, it is necessary to crush the waste paper, and a waste paper processing device is used for that purpose.

[0003] Shredders have conventionally been used as used paper processing equipment. The main purpose of the shredder is to keep the information written on the used paper confidential.
Cut into small pieces of about 3 mm. As a result, the fibers are finely cut, and the crushed paper pieces cannot be used as a raw material for recycled paper.

For this reason, there is a processing device shown in FIG. 3 as a processing device which does not cut the fibers of paper. As shown in the drawing, a pair of rotating shafts 1 and 2 extending in the horizontal direction are housed in a frame 6 in a state of being arranged in parallel on a horizontal plane,
A plurality of rotary blades 3 and 4 are fixed to 2 at equal intervals. The rotary blades 3 and 4 are provided so as to be alternately arranged in the axial direction and such that a part of the rotary blades 3 and the rotary blades 4 overlap each other when viewed from the axial direction.

At the upper part of the frame 6, an upper lid 7 also serving as a loading table for temporarily placing the used paper 13, and the used paper 13 is extruded horizontally along the upper lid 7 to guide the used paper 13 onto the rotary blade 4. Guide 8 is provided. 9 is an input port. Below the rotary blades 3 and 4, there is provided a coarse / fine filter 10 which is formed by attaching rod-shaped members at regular intervals in order to lower only a predetermined size of a piece of paper.

Next, the operation of the processing apparatus will be described.

In order to improve the biting efficiency of waste paper,
As shown by changing the length of the arrow in FIG. 3, the rotation speed of the rotary shaft 2 is set to be smaller than that of the rotary shaft 1, the crushed paper pieces are stripped off by the rotary blade 3, and the rotary blade 4 is covered with the paper pieces. It is set so as not to get entangled. When the used paper 13 is put into the inside of the frame 6 through the input port 9 while rotating the rotary blades 3 and 4 in the directions opposite to each other as shown by the arrows in FIG. 3, the used paper 13 becomes the rotary blade 4 having a small number of rotations. It is hooked, rotates downward from the outside of the rotary blade 4, moves to the biting part 5, and is crushed so as to be torn at the biting part 5. Since the rotation speed of the rotary blade 3 is set to be higher than that of the rotary blade 4, the crushed paper pieces are entangled with the rotary blade 3 and do not remain on the rotary blade 4, so that the rotary blade 4 is successively replaced with new waste paper 13. It becomes possible to hook and pull in. The crushed paper pieces fall from the biting portion 5 through the outside of the rotary blade 3, the small paper pieces pass through the coarse / fine filter 10 and descend, while the large paper pieces are caught by the rotary blade 3 and caught in the biting portion. It is transported to 5 and crushed again.

When a large amount of waste paper is continuously fed through the inlet 9, as shown in FIG. 3, the paper pieces 12 are retained between the rotary blade 3 and the inner wall of the frame 6, and the crushing ability is significantly lowered.

In order to favorably hook the paper pieces by the rotary blade 3 and prevent such paper pieces from staying, it is preferable to make the dimension from the blade tip to the blade bottom large. Detachment from the cutting edge and falling are not good, and the crushing ability also decreases. Therefore, there is a limitation in increasing the size of the rotary blade 3 from the blade tip to the blade bottom.

Therefore, as shown in FIG. 4, the guide plate 11
Is provided, and the distance between the guide plate 11 and the rotary blade 3 is set so that the outlet is smaller than the inlet of the sheet 12 so that the sheet 12 is more strongly pressed against the blade edge of the rotary blade 3.

[0011]

However, since the guide plate does not have elasticity, when a large amount of waste paper is continuously fed, a piece of paper may stay between the guide plate and the rotary blade to cause a paper jam. is there. Then, when the rotary blade is rotated in the reverse direction to eliminate the paper jam, the vicinity of the outlet of the paper piece in the guide plate is pushed up via the paper piece and the guide plate may be damaged. Therefore, it is necessary to increase the strength of the guide plate and to firmly attach the guide plate to the inner wall of the frame.

[0012] Therefore, an object of the present invention is to provide a used paper processing apparatus which solves the above problems.

[0013]

The structure of the invention according to claim 1 for achieving the above object is such that a piece of paper can be pressed against a rotary blade and is bent when the piece of paper stays. A leaf spring is provided along the plane that passes through the axis of the rotary shaft so that the paper piece can be ejected.The base end of the leaf spring is connected to the inner surface of the frame, while the tip is attached to the outer peripheral surface of the rotary blade. The structure of the invention according to claim 2 is characterized in that the leaf spring is arranged in a range from above the rotary shaft to a lateral side opposite to the other rotary shaft, In the structure of the invention according to claim 3, the crushed paper piece is stripped off by the rotary blade with a high rotation speed, while the used waste paper is hooked by the rotary blade with a low rotation speed. Provided, the leaf spring was facing the outer peripheral surface of the rotary blade with the higher rotation speed It features the door.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. In this embodiment, since a part of the conventional used paper processing apparatus is improved, the same parts as those in the related art are denoted by the same reference numerals, and the description thereof will be omitted.

The construction of a used paper processing apparatus according to the present invention is shown in FIG. As shown in the figure, leaf springs 14 and 15 are provided above the rotary blade 3 having a high rotational speed. Leaf spring 14,
Reference numeral 15 is arranged along a plane passing through the axis of the rotary shaft 1. The base end portion of the leaf spring 14 is attached to the inner wall of the frame 6, and the tip end faces the outer peripheral portion of the rotary blade 3. Leaf spring 1
The base end portion of 5 is attached to the lower surface of the upper lid 7 which constitutes a part of the frame. The leaf springs 14 and 15 are attached at their base end portions in a dogleg shape, and between the stay 17 connected to the inner wall of the frame 6 and the upper lid 7 and the flat plate 18, the bases of the leaf springs 14 and 15 are attached. It is done by holding the ends.

Regarding the shape of the rotary blades 3 and 4,
The rotary blade 3 has the same angle between two sides and the tangent line of the root circle, and the rotary blade 4 has one side and the tangent line of the root circle at substantially right angles. This is because the pieces of paper after crushing are not easily entangled with the rotary blades 3 and 4, and when entangled, the pieces of paper entangled with the rotary blade 4 are stripped off and the crushing is performed smoothly. Is. Further, the blades of the rotary blades 3 and 4 are not formed continuously but are formed at intervals with intervals. If it is formed continuously like a saw blade, it will be cut rather than crushed, but if it is formed intermittently, the cutting edge will bite into the waste paper and break it, without cutting the fiber of the paper This is because the purpose of crushing can be better achieved. In addition, an enlarged view of the vicinity of the engaging portion 5 in FIG. 1 is shown in FIG.
As shown in, the distance between the rotary shafts 1 and 2 is set so that the blade bottoms of the rotary blade 3 and the rotary blade 4 substantially overlap each other. As shown in FIG. 2 (b), this is the distance between the rotary shafts 1 and 2 shown in FIG.
If it is larger than (a), there will be a gap 19 between the blade bottoms.
When the waste paper is crushed, the waste paper escapes into the gap 19 and only the perforated holes formed by the rotary blades 3 and 4 are provided in the waste paper, so that the good crushing cannot be performed.
This is because when set as in (a), there is no space for the waste paper to escape during crushing, and good crushing is performed.

Next, the operation of the used paper processing apparatus will be described. In FIG. 1, when a piece of paper starts to stay on the rotary blade 3 as in the conventional case, the staying paper piece receives the rotational force of the rotary blade 3, so that the leaf springs 14 and 15 rotate the rotary blade 3 as shown by phantom lines. Bends in the direction of rotation. Therefore, when the amount of the paper piece above the rotary blade 3 increases, the amount of bending of the leaf springs 14 and 15 increases, and the biasing force of the leaf springs 14 and 15 presses the paper piece against the rotary blade 3 more strongly. . Therefore, the pressed paper pieces are hooked on the blade edge of the rotary blade 3 and sequentially transferred, and the local accumulation of the paper pieces is eliminated. Further, since the leaf springs 14 and 15 also serve as a guide plate for the paper pieces, the paper pieces can be transferred smoothly.

When the rotary blades 3 and 4 are reversed for some reason, the leaf springs 14 and 15 may be bent in the opposite direction, but are damaged by excessive force as in the conventional case. There is no fear.

In this embodiment, two leaf springs are attached, but one leaf spring or three or more leaf springs may be attached. Further, in the present embodiment, the leaf spring is arranged so as to face the rotary blade having a high rotation speed, but if there is no difference in the rotation speed, the leaf spring may be provided so as to face both rotary blades. This is because, if there is no difference in the rotation speed, the crushed paper pieces will be transported by any rotary blade. This is because the leaf springs are arranged in the range of about 90 ° between the upper side of the rotary blade and the side opposite to the other rotary blade because the paper pieces stay in this range.

[0020]

As can be seen from the above description, claim 1
According to the used paper processing apparatus according to 3 to 3, since the leaf spring facing the outer peripheral surface of the rotary blade is provided, when the paper piece stays on the rotary blade, the leaf spring is bent and the paper piece is biased by the leaf spring. It is pressed to, the transfer force of the paper piece by the rotary blade is increased, and the local accumulation of the paper piece is eliminated.

Further, the leaf springs are arranged along a plane passing through substantially the axis of the rotary shaft, and the base end portion is connected to the frame so that the front end portion faces the outer peripheral surface of the rotary blade. And the installation cost is low.

According to the used paper processing apparatus of claim 3,
By providing a difference in the rotation speed of the rotating shaft, the crushed paper pieces are stripped off by the rotating blade with a large rotating speed, so the leaf springs need only be exposed to one rotating blade with a large rotating speed. The number of leaf springs is small.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a used paper processing apparatus according to the present invention.

FIG. 2 is an explanatory diagram relating to a space between rotating shafts according to the used paper processing apparatus according to the present invention.

FIG. 3 is a configuration diagram of a conventional used paper processing apparatus.

FIG. 4 is a configuration diagram in which a conventional used paper processing apparatus is improved.

[Explanation of symbols]

 1, 2 ... Rotating shaft 3, 4 ... Rotating blade 5 ... Bit part 6 ... Frame 7 ... Upper lid 14, 15 ... Leaf spring

Claims (3)

[Claims] 1. A pair of rotary shafts, which are arranged substantially parallel to each other on a horizontal plane and are driven in mutually opposite directions, are provided inside a frame, and rotary blades are fixed to the rotary shafts respectively and inserted from above the rotary blades. In a used paper processing device that is designed to bite in used paper from below, a leaf spring is arranged along a plane that passes through substantially the axis of the rotating shaft, and the base end of the leaf spring is connected to the frame while the tip end is connected. An apparatus for treating waste paper, characterized in that the outer peripheral surface of the rotary blade is exposed. 2. The used paper processing apparatus according to claim 1, wherein the leaf spring is arranged in a range from above the rotary shaft to a side opposite to the other rotary shaft. 3. The plate spring according to claim 2, wherein a speed difference is provided between the rotational speeds of the pair of rotating shafts, and a leaf spring is provided with the tip end facing the outer peripheral surface of the rotary blade fixed to the rotating shaft having the higher rotating speed. The described used paper processing equipment.