JP3098745B1 - Crushing machine - Google Patents

Abstract

An object of the present invention is to provide a crusher capable of preventing a crushed piece from being wound around or entangled with a rotating shaft. SOLUTION: A pair of crushing units 1a and 1b are arranged so that the rotary blades 20a and the rotary blades 20b are alternately provided next to each other, and the rotating shafts 10a and 10b are rotated in opposite directions to each other to rotate the rotating shafts. This is a crusher for crushing an object to be crushed by the blades 20a and 20b. Between the rotary blades 20a and 20a,
Alternatively, ring-shaped members 30a and 30b are provided between the rotary blades 20b and 20b. Ring-shaped member 30
a and 30b are configured to be elastically displaced when the outer periphery thereof is pressed by the crushed pieces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher used for crushing an object to be crushed, such as waste paper or plastic products, into small pieces.

[0002]

2. Description of the Related Art When discarding used documents (computer paper, copy paper, and the like) and maintaining confidentiality or the like is necessary, processing such as finely crushing or shearing them may be performed. As a conventional apparatus used for such processing, for example, there is a shearing machine whose main part is shown in FIG. 9 and a crusher whose main part is shown in FIG. In the shearing machine shown in FIG. 9, the rotary blades 20a and 20a arranged in parallel at predetermined intervals on the outer circumference of a pair of opposed rotary shafts 10a and 10b, respectively.
b are brought into close contact with each other, and the rotating blades 20a and 20b are configured to shear documents and the like. on the other hand,
The crusher shown in FIG. 10 has rotating blades 20a and 20b arranged side by side at predetermined intervals on the outer periphery of rotating shafts 10a and 10b, respectively. When the blades 20a and 20b are rotated, the cutting edges 40a and 40b at the tip end of the blades 20a and 20b pierce and tear a crushing object such as a document.

In the case of the shearing machine shown in FIG. 9, if the paper to be sheared is paper such as a document, the paper fibers are sheared during the processing, so that the small pieces after the processing cannot be used as a raw material for recycled paper. There are inconveniences. On the other hand, in the crusher shown in FIG. 10, since the paper fibers are not sheared, there is no such disadvantage. In the crusher shown in FIG. 10, usually, the rotary blades 20a and 20b
A filter member that allows only crushed pieces smaller than a predetermined size to pass therethrough, for example, below, is provided.
0b, the crushed pieces smaller than the predetermined size among the crushed pieces obtained by the crushing by passing through the filter member are allowed to pass through and fall down, and the crushed pieces not larger than the predetermined size that do not pass through the filter member are rotated blades 20a, It is configured to be crushed again by 20b into smaller fragments. Such re-grinding may be repeated several times depending on the situation.

[0004] In these apparatuses, the treated small piece may be pushed between the other rotating blades by one rotating blade and wrapped around the rotating shaft. In particular, FIG.
In a crusher of the type that crushes crushed pieces again as in 0, since the crushed pieces stay around the rotary blade, if the crushing by the rotary blade is insufficient, the crushed pieces after treatment will be removed by the rotary blade. Crushed pieces tend to be entangled with the rotating shaft and pressed by the rotating blades on the opposed rotating shaft to be firmly compressed. As a result, the crusher may be stopped due to overload.

As a technique for preventing such entanglement, for example, there is a technique disclosed in Japanese Patent Application Laid-Open No. Hei 5-7790. As shown in FIG. 11, this technique employs an adjacent rotary blade 20 provided on each of the rotary shafts 10a and 10b.
The main content is that the ring-shaped members 30a and 30b are provided between a and 20b. Ring members 30a, 30b
Is a state in which the inner diameter is larger than the outer diameter of the rotating shafts 10a and 10b and is loosely fitted to the rotating shafts 10a and 10b, and does not rotate with the rotating shafts 10a and 10b. For this reason, the crushed pieces after the treatment do not wind around the ring-shaped members 30a and 30b, and the above-mentioned winding and entanglement are avoided.

[0006]

For example, when continuously processing a large number of crushed objects, a large amount of crushed pieces are pushed between the rotary blades. Therefore, in such a case, even if the configuration shown in FIG. 11 is employed, it is difficult to properly separate the crushed pieces from between the rotary blades, and the overload of the crusher may be stopped. This will be discussed in detail below for various types of ring-shaped members. <When the outer diameter of the ring-shaped member is small> In FIG.
The supplied crushing target 60 rotates together with the rotary blade 20a, and is crushed at a portion overlapping the rotary blade 20b, and the crushed piece 70 rotates together with the rotary blade 20b (FIG. 12).
(A)). Then, the ring-shaped member 30b provided on the rotating shaft 10b is lifted by the crushed pieces 70 and starts to rotate together with the crushed pieces 70 (FIG. 12B). When the object 60 to be crushed is further supplied in this state, the crushed piece 70 causes the ring-shaped member 30b to be eccentric (FIG. 12).
(C)) As a result, the crushed pieces 70 are concentrated and hardened at one place (FIG. 12 (d)), resulting in an overload stop of the crusher.

<When the outer diameter of the ring-shaped member is large> FIG.
In 3, as in the example of FIG. 12, the supplied crushed piece 70 of the crushed object 60 rotates together with the rotary blade 20 b (FIG. 13A). Here, the rotary blade 20b has a crushing process and a function of transporting the crushed pieces 70 sandwiched between the side-by-side rotary blades (FIG. 13B). However, at the portion where the ring-shaped member 30b protrudes from the outer periphery of the rotary blade 20b, this transport function is lost, and the crushed pieces 70 tend to accumulate inside the crusher. On the other hand, if the outer diameter of the ring-shaped member 30b is large, the outer periphery of the ring-shaped member 30b is pressed against and contacts the blade edge of the opposed rotary blade 20a. This state continues as long as the supply of the crushing object 60 continues, and when the contact pressure is strong, the ring-shaped member 30b is flipped up by the cutting edge of the rotary blade 20a. In this state, the discharge of the crushed pieces 70 by the ring-shaped member 30b becomes unstable, and the crushed pieces 70 gradually accumulate (FIG. 13 (c)). As a result, the crushed pieces 70 are concentrated in one place (FIG. 13).
(D)) As in the case where the outer diameter of the ring-shaped member is small,
Overload shutdown of the crusher occurs.

<Other ring-shaped members> As illustrated in FIG. 14, the outer periphery of the ring-shaped member is
It is also conceivable that the outer diameter is set to be substantially the same as the outer circumference of b. However, even in this case, the ring-shaped member 30b is gradually pushed up by the crushed pieces 70 (FIG. 14).
(B)) Finally, the crushed pieces 70 are concentrated in one place (FIG. 14 (c)). As illustrated in FIG. 15, a method of increasing the discharge efficiency of the crushed pieces 70 by reducing the inner diameter of the ring-shaped member 30b and increasing the outer diameter of the ring-shaped member may be considered. However, in this example, since the play interval between the rotating shaft 10b and the ring-shaped member 30b is reduced, the crushed pieces 70 are concentrated at one place as described above (FIG. 1).
5 (b)), overload stop is inevitable.

As described above, in the conventional crusher, the overload stop due to the wrapping or entanglement as described above cannot be reliably prevented. For this reason, it was necessary to separately provide a device for scraping off crushed pieces outside the rotary blade. Therefore, an object of the present invention is to provide a crusher having a structure capable of reliably preventing the crushed pieces from being wound around or entangled with the rotating shaft.

[0010]

According to the crusher provided by the present invention, a plurality of rotary blades are arranged at predetermined intervals on the outer circumference of a pair of rotary shafts rotatably supported at predetermined intervals in the axial direction of the rotary shafts. A pair of crushing units, and a pair of crushing units are arranged such that a rotary blade of one crushing unit and a rotary blade of the other crushing unit are alternately provided next to each other. A crushing machine that rotates in opposite directions and crushes an object to be crushed by a neighboring rotating blade, wherein a ring-shaped member mounted on an outer periphery of a rotating shaft is provided in a gap between the rotating blades in at least one of the crushing units. The ring-shaped member is configured to be elastically displaced when pressure is applied to the outer peripheral surface. Specifically, by providing an elastic member between the rotating shaft and the ring-shaped member, the ring-shaped member is elastically displaced. Preferably, a circumferential groove is provided on the outer peripheral surface of the ring-shaped member at a position corresponding to the cutting edge of the rotary blade of the other crushing unit to reduce the area of direct contact. As a more preferred form, the link-shaped member is loosely fitted to a rotation shaft between the elastic member and the link-shaped member.

The crusher according to the present invention includes a pair of crushing units each having a plurality of rotary blades arranged in parallel at predetermined intervals in the axial direction of the rotary shaft on the outer circumference of the pair of rotary shafts rotatably supported. A pair of crushing units are arranged such that the rotary blade of one crushing unit and the rotary blade of the other crushing unit are alternately provided adjacent to each other, and the pair of rotating shafts rotate in opposite directions to each other and are adjacent to each other. A crusher for crushing an object to be crushed by a rotating blade provided, wherein a ring-shaped member mounted on the outer periphery of the rotating shaft is provided in a gap between the rotating blades in at least one of the crushing units, and a cam is provided around the rotating shaft. Fix the member
The ring-shaped member is configured such that the position of the outer periphery thereof is displaced as the rotation shaft rotates.

In a preferred embodiment, a filter member is provided in the vicinity of the pair of crushing units for passing crushed pieces smaller than a predetermined size among crushed pieces obtained by crushing an object to be crushed by the pair of crushing units. The crushed pieces that do not pass through the filter member and are equal to or larger than the predetermined size are crushed again by the pair of crushing units.

[0013]

Embodiments of the present invention will be described below. An outline of the entire crusher of this embodiment is shown in FIG.
(B). This crushing machine is, for example, a paper such as a used document (hereinafter referred to as “used paper”) as a crushing target, and has a pair of crushing units 1 a and 1 b positioned in parallel in a case 9. Furthermore, this crushing unit 1
A used paper input port 2 is formed in the upper part of a and 1b. The rotating blades of the crushing units 1a and 1b are rotating in the directions indicated by arrows, and the waste paper supplied from the input port 2 is pressed against the outer peripheral surface of the crushing unit 1a by the pressing member 3 so that the crushing unit 1a is pressed. The crushing unit 1a is guided by a rotating blade of the crushing unit 1a to a portion where the pair of crushing units 1a and 1b mesh with each other (hereinafter referred to as a "meshing portion"). It is discharged from the meshing portion and reaches the filter member 4 having a passage hole of a predetermined size. The crushed pieces (recovered paper) having a size smaller than the passage hole fall to the compression section 5 located below the filter member 4, but the crushed pieces larger than the passage hole cannot be dropped and remain on the filter member 4. And the crushing units 1a and 1b are guided again to the meshing portion by the rotation of the rotary blades and crushed. Normally, the above operation is repeated until all the crushed pieces fall from the filter member 4. Since the used paper is crushed and stirred in the crusher by repeating the above operation, it is suitable for processing confidential documents and the like. The compression unit 5 compresses fine crushed pieces dropped from the filter member 4 by a screw press method into a lump. This mass
It is sequentially discharged to the outside along the chute 6. The crushing units 1a and 1b are driven by a drive mechanism 7 including a motor and gears, and the compression unit 5 is driven by a drive mechanism 8 including a motor, screws, and gears.

The structure of the crushing units 1a and 1b is as shown in FIG. In other words, the crushing units 1a and 1b of the present embodiment are arranged in parallel with each other, and each of the rotating shafts 10a and 10b supported rotatably and the rotating shaft 10a.
a, 10b, a plurality of rotary blades 20a, 20b arranged side by side at predetermined intervals in the axial length direction, and a plurality of rotary blades 20a, 20b arranged in a gap between the plurality of rotary blades 20a, 20b, and rotating shafts 10a, 10b. And ring-shaped members 30a and 30b mounted on the outer periphery of the device.

The pair of crushing units 1a and 1b are composed of a rotary blade 20a arranged on the rotating shaft 10a of one crushing unit 1a and a rotary blade 20b arranged on the rotating shaft 10b of the other crushing unit 1b. Are arranged alternately next to each other as shown. In addition, these adjacent rotary blades 20
The cutting edges 40a, 40b of a, 20b overlap by a length S.

The rotating shafts 10a and 10b are driven to rotate in opposite directions by driving means such as a motor (not shown). In addition, the rotary blades 20a and 20b
The rotating shafts 10a and 10b are fixed to the rotating shafts 10a and 10b by press-fitting or welding so as to rotate integrally with the rotating shafts 10a and 10b. Further, the rotary blades 20a, 20b may be formed integrally with the rotary shafts 10a, 10b. When integrally formed, for example, the ring-shaped members 30a and 30b are divided into a pair of semi-circular members, and the pair of semi-circular members are divided into the rotary blades 20 of the rotating shafts 10a and 10b.
a, the ring-shaped members 30a, 3b
0b is used.

The ring-shaped members 30a and 30b are made of a material having a predetermined hardness such that they do not deform themselves, such as metal or hard plastic. The inner diameter of the ring-shaped members 30a, 30b is
And the length thereof is set smaller than the distance between the rotary blades 20a and between the rotary blades 20b. Note that the ring-shaped member 30b may have an outer radius smaller than the shortest distance from the center of the rotary shaft 10b to the outer circumference of the rotary blade 20a as illustrated in FIG.
From the center of the rotating shaft 10b as shown in FIG.
It may be larger than the shortest distance to the outer circumference. The same applies to the case of the ring-shaped member 30a. Between the ring-shaped member 30a and the rotating shaft 10a, and between the ring-shaped member 30b and the rotating shaft 10a.
b, elastic members 50a and 50b are provided respectively. The elastic members 50a and 50b are preferably made of an elastic material such as foamed rubber. Further, the elasticity of the elastic member 5 is appropriately selected as needed.

Next, the operation of the crusher configured as described above will be described focusing on the interaction between the crushing units 1a and 1b. First, referring to FIG.
The case where the outer diameters of a and 30b are relatively small as illustrated in FIG. 3A will be described. The rotating shaft 10 constituting the crushing units 1a and 1b is driven by driving means (not shown).
a and 10b are rotated in arrow directions I and II, respectively.
In this state, the used paper 60 to be crushed is thrown in from above the crushing unit 1a. The used paper 60 is the rotating blade 20a.
Pierced or caught by the blade edge 40a (not shown), and moved to the engaging portion 25 together with the rotary blade 20a rotating in the arrow direction I, and crushed into crushed pieces 70 by the engaging portion 25. The crushed pieces 70 are sandwiched between a plurality of rotary blades 20b arranged in parallel in the crushing unit 1b, and the rotary blades 2
It moves in the arrow direction II with the rotation of 0b.

The fragment 70 conveyed by the rotary blade 20b
When it is in a relatively small amount, it falls below the rotary blade 20b due to centrifugal force and its own weight due to rotation during transport. Here, when the waste paper 60 is to be continuously processed in a large amount, the crushed pieces 70 returning to the engaging portion 25 increase,
The crushed pieces 70 may be in a state unevenly distributed in the engagement portion 25. In this case, in the crusher of the present embodiment, the rotary blade 20a presses the outer peripheral surface of the ring-shaped member 30b to the left in FIG. 4A via the crushed pieces 70 thus collected.

As a result, the elastic member 50b inside the ring-shaped member 30b is deformed by the stress from the ring-shaped member 30b. As a result, the ring-shaped member 30b is in the state shown in FIG.
At the left side, it is elastically displaced to the left and becomes eccentric. Since the crushed pieces 70 interposed between the engagement portions 25 and the respective rotary blades 20b coaxially arranged in the vicinity of the crushing unit 1b are pushed outward from between the rotary blades 20b by the elastic displacement of the ring-shaped member 30b. In addition, winding and entanglement of the crushed pieces 70 can be reliably prevented. Also,
In the case of this elastic displacement, the distance between the ring-shaped member 30b of the crushing unit 1b and the rotary blade 20a of the crushing unit 1a increases, and the force applied to the crushed pieces 70 decreases. FIG.
As shown in (a) and (b), it is led out of the crushing unit 1a and removed. The crushed pieces 70
In the state in which there is no longer, the above-mentioned pressing is released, so that the ring-shaped member 30b autonomously returns to the original position by the elasticity of the elastic member 50b. The above operation is performed by the rotary blades 20a, 2
Ob is repeated while rotating, and the crushed pieces 70 sandwiched between the meshing portions 25 are removed each time.

As described above, by providing the elastic member 50b inside the ring-shaped member 30b, the ring-shaped member 30b
Rotates about the same point as the rotating shaft 10b, while being eccentric when pressed by the crushed pieces 70 as described above. In addition, the amount of eccentricity of the ring-shaped member 30b increases in accordance with the increase in the crushed pieces 70, and the ability to discharge the crushed pieces increases. However, after the pressing is released, the elasticity of the elastic member 50b causes the ring-shaped member 30b to return to the original position autonomously, so that compared to a conventional crusher of this type in which the eccentric state is continued. Overload stop due to biting is less likely to occur.

By appropriately increasing the elasticity of the elastic member 50b, the ring-shaped member 30b is not easily lifted by the crushed pieces 70, so that the crushed pieces 70
Can be avoided, and the stoppage of the crusher due to biting becomes more unlikely. Further, the ring-shaped member 30
b, the elastic member 50b is provided between the rotating shaft 10b
And the ring-shaped member 30b are not in contact with each other, so that noise due to the contact is prevented.

Next, referring to FIG. 4B, the operation when the outer diameters of the ring-shaped members 30a and 30b are large as illustrated in FIG. 3B will be described. The operation in this case is basically the same as the case where the outer diameter is small, except that the rotary blade 20a
4B is always in contact with the ring-shaped member 30b, and the ring-shaped member 30b is constantly pushed to the left in FIG. This means that even if the amount of the used paper 60 is small,
Since “b” is always at a position where each crushed piece 70 can be discharged, it means that excessive biting can be prevented in advance.

FIG. 5 shows the ring-shaped member 30b as described above.
In the case where the outer periphery of the rotary blade 20a comes into contact with the cutting edge 40a of the rotary blade 20a, a configuration example for preventing abrasion due to contact on the outer peripheral surfaces of the rotary blade 20a and the ring-shaped member 30b has been described. That is, in this example, the circumferential groove 3 is located at a position corresponding to the cutting edge 40a of the rotary blade 20a on the outer peripheral surface of the ring-shaped member 30b.
2b is formed, and both sides of the cutting edge 40a are brought into contact with or contact with both edges of the peripheral groove 32b. With such a structure, wear of the ring-shaped member 30b is prevented, and wear of the tip of the cutting edge 40a is prevented, so that it is possible to prevent the cutting edge 40a from piercing and tearing the used paper and lowering the function of tearing.

Further, as shown in the illustrated example, the distance between the outer periphery of the ring-shaped member 30b and the cutting edge 40a of the rotary blade 20a is increased by forming the outer periphery of the ring-shaped member 30b into a V-shape without a V-shape. can do. As a result, the effective outer diameter of the ring-shaped member 30b is substantially increased, and the effect of discharging the crushed pieces by the ring-shaped member 30b can be increased. The shape is not limited to the above-described V-shape or U-shape, and may be, for example, a semicircular shape.

As shown in FIGS. 6A and 6B, a second ring-shaped member (inner ring-shaped member) 35b is provided between the rotating shaft 10b and the elastic member 50b. By forming a gap 56b between the rotary shaft 35b and the rotary shaft 10b, the ring-shaped member 30b may be freely rotatably fitted to the rotary shaft 10b. By loosely fitting the ring-shaped member 30b in this manner, the rotating shaft 10b
And the ring-shaped member 30b do not rotate together,
The overload stop of the crusher due to the bite becomes more difficult to occur. Note that a structure may be employed in which the rotating shaft 10b and the ring-shaped member 30b co-rotate without providing an interval between the ring-shaped member 35b and the rotating shaft 10b.

As described above, the following effects can be obtained by providing the elastic member inside the ring-shaped member. (1) Noise during operation can be suppressed by vibration absorption by the elastic member. (2) In the conventional crusher, the degree of freedom of the operation of the ring-shaped member may be lost due to intrusion, accumulation, and solidification of dust inside the ring-shaped member, but in the present embodiment, an elastic member is provided inside the ring-shaped member. As a result, there is no intrusion of dust and the freedom of operation of the ring-shaped member is ensured. (3) Since the ring-shaped member is elastically displaced, the outer diameter of the ring-shaped member can be freely selected to some extent, thereby facilitating the design of the crusher. Further, by the elastic displacement, the crushed pieces can be pushed and discharged by the ring-shaped member using the force of the opposing rotary blade and crushed pieces. In this case, as the load becomes heavier, the amount of elastic displacement increases, and the discharge function improves. Moreover, even if the height of the rotary blade (dimension from the cutting edge to the blade bottom) of the crushing machine is low and the cutting edge does not sufficiently penetrate the crushed pieces, the height of the rotary blade is increased to some extent by the elastic displacement of the ring-shaped member. Since it can be ensured, the crusher of this type can easily apply the present invention. Further, in the crusher in which the overlapping distance between the opposed rotary blades is large, the amount of elastic displacement can be increased by that much, and a greater effect can be obtained.

<Other Embodiment 1> FIG. 7 is a view showing another embodiment of the present invention. In this embodiment,
This is an example in which a large number of springs 51b are used as elastic members instead of the elastic material such as the foamable member described above. These springs 51b are connected to the rotating shaft 10b.
The ring-shaped member 30b is mounted between the outer periphery of the ring-shaped member 30b and the inner peripheral surface of the ring-shaped member 30b, and holds the ring-shaped member 30b in an elastically biased state with respect to the rotating shaft 10b.

<Other Embodiment 2> FIG. 8 shows another embodiment of the present invention. In this embodiment, a cam member 52b fixed to the outer periphery of the rotating shaft 10b and rotating integrally therewith between the rotating shaft 10b and the ring-shaped member 30b.
And the ring member 30b is provided by the cam member 52b.
The eccentricity of The cam member 52b presses the inner peripheral surface of the ring-shaped member 30b according to the shape of the outer peripheral surface thereof when the rotating shaft 10b rotates, whereby
The ring-shaped member 30b is swung from the inside with the rotation of the rotating shaft 10b. As a result, the ring-shaped member 30
As for b, the position of the outer periphery thereof is displaced with the rotation of the rotating shaft 10b, that is, the eccentricity is changed while changing the distance from the rotating blade 20a of the opposing crushing unit. Due to this eccentricity, crushed pieces sandwiched between the meshing portions are removed as in the above-described example. In the illustrated example, the cam member 5
As 2b, a member having a triangular cross section whose distance from the center to three vertices is smaller than the inner diameter of the ring-shaped member 30b is used, but other members having a polygonal cross section or the distance from the center to the outer peripheral surface vary. A member to be used can be used as appropriate. Preferably, the cam member 52b is made of a material that allows a slight elastic deformation.

<Other Embodiment 3> In addition to the above embodiments, for example, as shown in FIGS. 9 (a) and 9 (b), they are juxtaposed at predetermined intervals on the outer periphery of a pair of opposed rotating shafts. The present invention can be similarly applied to a crusher in which a crushing unit is configured by closely contacting the rotated blades with each other. Although the above description is an example in which the object to be crushed is waste paper, the present invention
In addition to waste paper, the present invention is similarly applicable to a crusher for crushing plastic products such as plastic bottles, fabrics, and vegetable waste. In particular, by appropriately selecting the elastic force of the elastic member inside the ring-shaped member, even in the case of a crushing object such as a plastic bottle where the material is hard and easily clogged between the rotary blades, The overload stop of the crusher can be effectively prevented.

[0031]

As is apparent from the above description, according to the crushing machine of the present invention, the ring-shaped member mounted in the gap between the rotary blades juxtaposed to the rotary shaft of the crushing unit is pressed against the outer peripheral surface thereof. Since it is configured to be elastically displaced when it is applied, or because the ring-shaped member is configured so that the position of its outer periphery is displaced with the rotation of the rotating shaft, the crushed pieces are reliably prevented from winding or tangling around the rotating shaft. In addition, it is possible to prevent the crusher from being overloaded due to the winding or entanglement. And the uneven distribution of the crushed pieces between the rotary blades is eliminated, and the transport function of the rotary blades is not impaired. Therefore, the material to be crushed is relatively effective, such as a plastic bottle, and is particularly effective for a material that is easily clogged between the rotary blades. further,
Since the overload can be prevented, the horsepower can be reduced and the size of the electric motor can be reduced, and the stress applied to the device can be reduced to extend the life. According to the present invention, the conventional problem can be solved by a simple, lightweight and inexpensive mechanism that does not require a conventional scraping device.

[Brief description of the drawings]

FIG. 1A is an explanatory diagram viewed from a side of a crusher according to an embodiment of the present invention, and FIG. 1B is an explanatory diagram viewed from the same front.

2 (a) is an explanatory view of a crushing unit constituting the crushing machine of FIG. 1, and FIG. 2 (b) is a sectional view taken along the line AA in FIG. 2 (a).

FIG. 3A is an explanatory view of a main part of a crusher according to an embodiment of the present invention when a ring-shaped member having a small outer diameter is used,
(B) is an explanatory view of a similar main part when a ring-shaped member having a large outer diameter is used.

FIG. 4 (a) is an explanatory view of the operation of the crusher of FIG. 3 (a),
(B) is an explanatory view of the operation of the crusher of FIG. 3 (b).

FIG. 5 is an explanatory view of another embodiment of the present invention in which a circumferential groove is provided on the outer periphery of a ring-shaped member.

FIG. 6 (a) is a side view of a main part of a crushing unit constituting another embodiment of the present invention provided with a second ring member,
FIG. 7B is a sectional view taken along line BB in FIG.

FIG. 7 is an explanatory view showing a main part of a crusher according to another embodiment of the present invention.

FIG. 8 is an explanatory view showing a main part of a crusher according to another embodiment of the present invention.

9A is a side view of a conventional crushing unit of a crusher, and FIG. 9B is a cross-sectional view taken along the line CC in FIG. 9A.

10 (a) is a side view of another conventional crushing unit of the crusher, and FIG. 10 (b) is a sectional view taken along the line DD in FIG. 10 (a).

11A is a side view of another conventional crushing unit of the crusher, and FIG. 11B is a cross-sectional view taken along the line EE in FIG. 11A.

FIGS. 12A to 12D are explanatory diagrams of a problem in the related art.

FIGS. 13A to 13D are explanatory diagrams of problems in the related art.

FIGS. 14 (a) to (c) are explanatory diagrams of problems in the related art.

FIGS. 15A and 15B are explanatory diagrams of problems in the conventional technology.

[Explanation of symbols]

 1a, 1b Crushing unit 5 Compressor 10a, 10b Rotary shaft 20a, 20b Rotary blade 30a, 30b Ring-shaped member 35b Inner ring-shaped member 40a, 40b Blade tip 50a, 50b Elastic member 51b Spring 52b Cam member 60 Crushed object 70 Crushed piece

Claims (6)

(57) [Claims] 1. A pair of crushing units each having a plurality of rotary blades arranged in parallel at predetermined intervals in an axial direction of the rotary shaft on the outer circumference of the pair of rotary shafts rotatably supported, respectively.
The rotating blades of one crushing unit and the rotating blades of the other crushing unit are arranged so as to be adjacent to each other alternately, and the pair of rotating shafts rotate in opposite directions to each other and are crushed by the adjacent rotating blade. A crusher for crushing an object, wherein a ring-shaped member attached to an outer periphery of the rotating shaft is provided in a gap between the side-by-side rotating blades in at least one of the crushing units; However, a crusher configured to be elastically displaced when pressure is applied to the outer peripheral surface thereof. 2. The crusher according to claim 1, wherein the ring-shaped member is elastically displaced by providing an elastic member between the rotating shaft and an inner wall of the ring-shaped member. 3. The crusher according to claim 1, wherein a circumferential groove is provided at a position corresponding to a cutting edge of a rotary blade of the other crushing unit on an outer peripheral surface of the ring-shaped member. 4. The crusher according to claim 2, wherein a second ring-shaped member loosely fitted to the rotating shaft is provided between the rotating shaft and the elastic member. 5. A pair of crushing units in which a plurality of rotary blades are respectively provided on the outer periphery of a pair of rotary shafts rotatably supported at predetermined intervals in an axial direction of the rotary shafts, respectively.
The rotary blade of one crushing unit and the rotary blade of the other crushing unit are arranged so as to be adjacent to each other alternately, and the pair of rotary shafts rotate in opposite directions to each other and crush by the adjacent rotary blade. A crusher for crushing an object, wherein a ring-shaped member mounted on the outer periphery of the rotating shaft is provided in a gap between the juxtaposed rotating blades in at least one of the crushing units, and Between the ring-shaped member and the outer periphery of the rotating shaft
A crusher provided with a cam member which is fixed and rotates integrally therewith, and wherein the ring-shaped member is configured such that the position of the outer periphery thereof is displaced with the rotation of the rotating shaft. 6. A filter member is provided in the vicinity of said pair of crushing units, wherein a filter member for passing crushed pieces smaller than a predetermined size among crushed pieces obtained by crushing an object to be crushed by said pair of crushing units is provided. The crusher according to any one of claims 1 to 5, wherein the crushed pieces having the predetermined size or more that do not pass through the filter member are crushed again by the pair of crushing units.