JP2513971B2 - Crushing equipment for used paper - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste paper crushing device used for discarding or recycling used waste paper.

[0002]

2. Description of the Related Art Used paper used in offices is discarded or recycled for use. It is necessary to roughly crush waste paper in order to dispose of it or recycle it, and therefore a waste paper crushing device is used.

The structure of the main part of a generally known conventional crushing apparatus is shown in FIGS. 6 (a) and 6 (b). As shown, a pair of rotating shafts 1 and 2 extending in the horizontal direction are arranged in parallel on a horizontal plane, and a plurality of rotating blades 3 and 4 are fixed to the rotating shafts 1 and 2 at equal intervals. Blades 3a and 4a are formed on the rotary blades 3 and 4, and the rotary blades 3 and 4 are provided so as to be alternately arranged in the axial direction and a part of the rotary blades overlap each other.

When used paper is loaded from above the rotary blades 3 and 4 in such a crushing device, the used paper is rotated by its own weight.
It is sent to the space between the two and is roughly crushed, and then falls down by its own weight.

[0005]

However, if, for example, hundreds of pieces of waste paper having a thickness corresponding to the telephone directory are thrown together, a large amount of waste paper is fed into the rotary blades 3 and 4 due to its own weight. There is a case where the rotary shaft is stopped by being bitten between the rotary blades and the rotary shaft at the same time. Further, even when the waste paper is crushed, the waste paper passes through between the rotary blades 3 and 4 and is crushed only once, so that the waste paper becomes a band and does not become a small piece. On the other hand, if the dimensions a and b shown in FIG. 6 are made larger in order to prevent this, if the number of used paper is small, the used paper will fall without being sufficiently crushed.

[0006] Therefore, an object of the present invention is to provide a waste paper crushing apparatus that solves the above problems.

[0007]

The structure of the present invention for achieving the above-mentioned object is such that a pair of rotating shafts extending in a substantially vertical direction inside a housing are substantially parallel to each other and opposite to each other. And a plurality of rotary blades are fixed to the respective rotary shafts, and the rotary blades provided on one rotary shaft and the rotary blades provided on the other rotary shaft are alternately arranged in the axial direction. It is characterized in that the interval between adjacent rotary blades is set to decrease from top to bottom, and a waste paper inlet is provided at the top of the housing, while a discharge outlet is provided at the bottom, or in addition to this. The outer diameter of the rotary blade located on the lower side is set larger than the outer diameter of the rotary blade located on the upper side.

[0008]

In the apparatus for crushing used paper according to the first aspect, when the used paper is fed from the charging port, the rotary blades provided on the pair of rotary shafts bite the used paper to roughly crush the used paper, and then the other weight is applied to the other. While being wound around the used paper, the used paper is bitten by the rotary blade a plurality of times, is thus roughly crushed, and is then discharged from the housing through the discharge port. In the upper part of the housing, the rotation axis extends vertically so that the gravity of the waste paper does not help to feed the waste paper, and because the gap between the rotating blades is wide at the top, the pulling force of the waste paper is smaller than at the bottom, Most waste paper is not caught. Therefore, the rotating shaft does not stop due to the frictional force with the used paper. On the other hand, the waste paper that has been bitten once is bitten between the rotary blades a plurality of times until it moves to the lowermost part of the housing, so that it is roughly crushed into small pieces.

In the waste paper crushing apparatus according to the second aspect, since the outer diameter of the lower rotary blade is larger than that of the upper blade, the area of the overlapping portions of the rotary blades is larger in the lower portion and larger in the upper portion. Waste paper that has been crushed into pieces is crushed smaller at the bottom. In other words, in the upper part, the overlapping area of the rotary blades can be made smaller so that the drawing force of the waste paper can be made smaller than in the lower part, and the rotation shaft can be prevented from stopping due to overload.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

(A) First Embodiment A first embodiment of a waste paper crushing apparatus according to the present invention will be described with reference to FIGS.
Shown in As shown in FIG. 1, a rectangular parallelepiped casing 11 is provided which is long in the vertical direction, and a pair of rotating shafts 12 and 13 extending in the vertical direction are rotatably supported in the casing 11 in parallel with each other. It These rotary shafts 12 and 13 are configured to be rotationally driven in mutually opposite directions as indicated by arrows in FIGS. In this embodiment, the rotary shaft 1
Spur gears 14, 15 that mesh with each other are provided on the upper portions of 2, 13, a motor 16 is attached to the upper surface portion of the housing 11, and a bevel gear that meshes with the output shaft of the motor 16 and the upper end of the rotary shaft 12 is provided. By providing 17 and 18, the rotation shafts 12 and 13 are driven to rotate in mutually opposite directions by the rotation driving of the motor 16. However, the present invention is not limited to this, and an appropriate means such as a structure in which a motor is connected to each of the rotating shafts 12 and 13 can be adopted.

As shown in FIG. 3, two kinds of rotary blades, a rotary blade 19 and a rotary blade 20, are fixed to the upper and lower portions of the rotary shafts 12 and 13, respectively, in this embodiment, three blades. These rotary blades 19 and 20 are arranged such that the one fixed to the rotary shaft 12 and the one fixed to the rotary shaft 13 are arranged alternately in the axial direction, and the intervals between the rotary blades are from top to bottom. It is fixed so that it becomes smaller as it goes. In this way, we arranged so that the distance between the rotary blades becomes smaller as we move downward, so that even if many stacked waste papers are thrown in at the same time, the rotary shaft will stop and the rotary shaft will stop. There is a sufficiently wide interval without any gap, and the lower part has a narrower interval than the upper part in order to roughly crush the waste paper roughly crushed in the upper part to an arbitrary size. In the following, the upper part with a wide interval in FIG. 3 will be described as a crushing part 21, and the lower part with a narrow interval will be described as a crushing part 22.

In the present embodiment, the rotary blade 19 arranged in the crushing section 21 has blades 19a and 19b having sharp tips as shown in FIG. 4 (a). On the other hand, as shown in FIG. 4B, the rotary blade 20 arranged in the coarsely crushing section 22 has a sharp blade. The blades 19a and 19b shown in FIG. 4 (a) are cut by cutting off the lower side of the blade portion of the rotary blade 20 as shown in FIG. 4 (b).
The blades 19b are formed by cutting off the upper side, and the blades 19a and the blades 19b are alternately arranged, but the shape is not limited to this, that is, a blade having a pointed tip. Is preferably used.

The crushing unit 21 having the blades 19a and 19b with sharp tips like the rotary blade 19 is used in some cases so long as the crushing unit 21 can roughly crush a large amount of used paper. However, as shown in FIG. 4A, only the rotary blades with sharp tips are arranged on the pair of rotary shafts at the same intervals, and only the rotary blades as shown in FIG. 4B are the same on the pair of rotary shafts. An experiment was conducted by inserting the same amount of laminated paper for the case of arranging at intervals, and it was found that the case of using a rotary blade having a sharp-edged blade as shown in FIG. This is because it was found that a large amount of the laminated paper was pulled in little by little without being caught, and a large load was not applied to the motor 16, and the motor 16 operated more smoothly. The reason why the rotary blade 20 as shown in FIG. 4B is used in the crushing section 22 is to crush the waste paper to a desired size sufficiently. The shape of the blade is not particularly limited to these, and can be selected according to the paper quality, the amount of paper, and the like.

A winding prevention ring 23 is provided between the rotary blades 19 and 20 in order to prevent the waste paper from winding around the rotary shafts 12 and 13 and stopping when the crushed paper becomes a band. It is provided.

An input port 24 for inputting used paper to the upper side of the crushing section 21 shown in FIG. 3 is formed in the upper part on the back side of the casing 11, while discharging the used paper after coarse crushing. The discharge port 25 is formed in the lower part on the front side. Reference numeral 26 is a horizontal bar, and the waste paper loaded from the loading port 24 is the rotary blade 1.
9 and 20 fall to the bottom without being crushed, and the lump of waste paper after passing through the crushing unit 21 passes through the crushing unit 22 and is sequentially dropped without being crushed. This is provided in order to prevent this from happening as much as possible and to perform the crushing of the waste paper better, and in the present embodiment, the boundary between the crushing section 21 and the crushing section 22 and each position above the crushing section 22. There are two in total, but the number and installation position are appropriately provided as needed. Since the horizontal bar 26 is arranged in the horizontal direction, the used paper is prevented from falling, but the rotary blade 1
When 9 and 20 rotate to perform coarse crushing, they do not interfere with the rotation or the like.

Next, the operation of such a waste paper crushing device will be described. With the output shaft of the motor 16 rotated, the inlet 24
When the used paper 27 is further loaded, the sharp blades 19a and 19b of the rotary blade 19 hook the used paper 27 and draw it between the rotary shafts 12 and 13. At this time, even if a large amount of waste paper is thrown in, since the interval between the rotary blades is widened in the upper crushing unit 21, the waste paper is not caught and the rotation is not stopped. The sharp ends of the blades 19a and 19b pull in the used paper in an appropriate amount so that the used paper can be smoothly drawn. The waste paper drawn into the crushing section 21 is rotated while being entwined with the rotary blade 19,
As it continues to rotate, it is gradually crushed. Then, the used paper crushed to an appropriate size falls to the lower part, but the crushed paper is not sufficiently crushed, and the used paper separated from the blades 19a and 19b as a lump is caught again by the horizontal bar 26 while falling downward, The lower rotary blade 19 is brought into contact with the lower rotary blade 19 to be pulled in, and similarly crushed.

The waste paper that has been crushed and dropped downward is caught by the rotary blade 20 of the coarse crushing section 22 and further crushed into a proper size depending on the position of the drop, and the waste paper that has fallen around the rotary blade 20 gradually. Then, they are stacked below each other in a state in which they are entwined with each other, and when they are stacked to some extent, they come into contact with the rotary blade 20 and are eventually drawn into the rotary blade 20 to be crushed.

A part of the waste paper 27 charged from the charging port 24 and a part of the waste paper mass passing through the crushing section 21 are not drawn into the crushing section 22 in some cases, and the horizontal bar 2 is used.
There is a case in which 6 also falls down without being caught. However, even when the used paper drops to the lower side in this way, when the used paper that is crushed or crushed and stacked below the housing 11 is drawn into the rotary blade 20 and is entangled together and crushed. Is done. Since there is a small amount of waste paper in such a state, there is no concern that it will be caught and rotation will stop.

As described above, the waste paper that is thrown in from the upper side and gradually crushed and dropped downward is finally coarsened to an arbitrary size from the discharge port 25 of the housing 11 by the rotational force of the rotary blade 20. It is crushed and discharged.

The coarsely crushed waste paper discharged from the housing 11 in this manner is reduced in size by adding water and then squeezed, and then discarded or used as recycled paper.

The number of rotary blades is not limited to this embodiment, but may be set arbitrarily, and the interval between adjacent rotary blades may be continuously reduced from top to bottom as in this embodiment. ,
Alternatively, it may be divided into an upper block having a large interval and a lower block having a small interval.

(B) Second Embodiment Next, a second embodiment of the waste paper crushing apparatus will be described with reference to FIG.

As can be seen from comparison with FIG. 3, the outer diameter dimension of the lower rotary blade 20 of each rotary shaft 12, 13 is set larger than the outer diameter dimension of the upper rotary blade 19.
The outer diameter of the anti-winding ring 23 of the other rotary shaft positioned at the height corresponding to the rotary blade 20 is set smaller than the outer diameter of the upper anti-winding ring 23. this is,
This is for suppressing contact with the rotary blade 20.

As in the first embodiment, not only is the spacing of the lower rotary blades 20 smaller than that of the upper rotary blades 20, but also the lower rotary blades 20.
Since the outer diameter of the is larger than that of the upper part, the lower part has a larger crushing capacity than the upper part. Therefore, in the upper part, the pulling force of the waste paper is small and many waste papers are not bitten at once and the rotation axis does not stop, while in the lower part, the waste paper roughly crushed in the upper part is crushed into smaller pieces. can do. Since the difference in crushing capacity between the upper part and the lower part can be increased in this way, the distance between the rotating shafts should normally be increased at the time of biting, as in the case of crushing thick booklets, and it should be made smaller after crushing. Even in such cases, crushing can be performed without changing the distance between the shafts.

The rest of the configuration and operation are similar to those of the first embodiment, and the explanation thereof is omitted.

[0027]

As is apparent from the above description, claim 1
According to the waste paper crushing apparatus according to the above, since the pair of rotary shafts having the rotary blades are installed in the state of the vertical long axis in the vertical direction, unlike the case where the horizontal axis is used, the self-weight of the used waste paper is different between the rotary blades. It does not force the sending of waste paper between
In addition, since the upper part of the rotary blades is wider than the lower part to reduce the pulling force of waste paper, even if many waste papers are thrown in at one time, a large amount of waste paper is caught between the rotary blades at the top at one time. The rotating shaft does not stop because a large amount of waste paper is caught between the rotating blades. In other words, these means that the used paper can be roughly crushed without stopping the rotating shaft, and can be performed with a driving force smaller than the conventional one. In addition, since the rotation axis is the vertical axis, the waste paper roughly crushed at the top moves downwards of the housing while being repeatedly bitten between the rotary blades by other dead paper due to its own weight and the rotating force of the rotary blade. Moving. For this reason,
By the time it moves to the bottom of the housing, the waste paper is surely crushed into small pieces.

On the other hand, according to the waste paper crushing apparatus of the second aspect, since the outer diameter of the lower rotary blade is larger than that of the upper portion, the crushing capacity is small in the upper part and the force for taking in the waste paper is small, so that it is thick. Even if a booklet or the like is caught, the rotating shaft does not stop due to overload, and the crushing capacity is large in the lower part, and crushing can be performed reliably. Therefore, even when a thick booklet is crushed, it is not necessary to take measures such as changing the interval between the rotating shafts to prevent the rotating shafts from stopping due to overload.

[Brief description of drawings]

FIG. 1 is a front perspective view showing a first embodiment of a used paper crushing apparatus according to the present invention.

FIG. 2 is a rear perspective view showing the first embodiment of the waste paper crushing apparatus according to the present invention.

FIG. 3 is a configuration diagram of a main part showing a first embodiment of a waste paper crushing apparatus according to the present invention.

FIG. 4 is a perspective view of an upper rotary blade and FIG. 4B is a perspective view of a lower rotary blade according to the first embodiment of the used paper crushing apparatus according to the present invention.

FIG. 5 is a configuration diagram showing a main part of a second embodiment of a waste paper crushing apparatus according to the present invention.

FIG. 6 is a diagram showing a main part of a conventional waste paper crushing apparatus.
6A is a plan view and FIG. 6B is a front view.

[Explanation of symbols]

 11 ... Housing 12, 13 ... Rotating shaft 16 ... Motor 19,20 ... Rotating blade 24 ... Input port 25 ... Discharge port

Claims (2)

(57) [Claims] 1. A pair of rotary shafts extending in a substantially vertical direction are supported in a housing so as to be rotatable in opposite directions to each other in a state of being substantially parallel to each other, and each rotary shaft has a plurality of rotary blades. And the rotary blades provided on one rotary shaft and the rotary blades provided on the other rotary shaft are alternately arranged in the axial direction and the distance between adjacent rotary blades becomes smaller from top to bottom. The waste paper crushing device is characterized in that the waste paper input port is provided in the upper part of the housing while the discharge port is provided in the lower part. 2. The waste paper crushing apparatus according to claim 1, wherein the outer diameter of the rotary blade located at the lower portion is set larger than the outer diameter of the rotary blade located at the upper portion.