JPH0738953B2 - Crushing roller in coarse crusher - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing roller in a coarse crusher for crushing coarse materials such as wood, paper, plastic, and asphalt lumps.

[0002]

2. Description of the Related Art An example of the above crusher is shown in FIGS. The crusher 50 is composed of upper crushing rollers 51 and 52, which are generally parallel to each other, and a lower crushing roller 53, which is disposed in close proximity to the upper crushing rollers 51 and 52, and has screw-shaped crushing blades 51a, 52a and 53a, respectively. Equipped with.
Each of these crushing blades has a different feeding speed in the axial direction of a coarse object due to rotation, and the coarse object is gripped and crushed and sheared by the relative speed difference. 54 and 5
Reference numeral 5 denotes a cutter and an auxiliary guide that are respectively provided to face the lower crushing roller.

[0003]

When using the above-mentioned crusher, the coarse particles are first crushed by the upper crushing rollers 51 and 52 to form a crushed material, which is fed into the space C, and then one of the upper crushing roller 52 and the lower crushing roller. It is crushed again by 53 and made into fine particles and discharged. At this time, the surplus coarsely crushed materials remaining in the spaces C and E are returned to the upper portions of the upper crushing rollers 51 and 52 following the rotation of the rollers. However, the crushing blades 51a, 52a are screw-shaped and do not have a scooping function by themselves, and the space C
C and E are filled with the coarsely crushed material, and the coarsely crushed material is pushed up by pushing the coarsely crushed material further from above, and the coarsely crushed material is compressed and accumulated in the spaces C and E. Therefore, the crusher is overloaded. There are problems such as

The present invention has been made in view of the above points, and it is an object of the present invention to effectively scoop up the above-mentioned coarsely crushed material and improve the crushing ability.

[0005]

According to the present invention for achieving the above object, at least one of the upper crushing rollers is provided with a pair of screw-shaped crushing blades whose twist directions are opposite to each other. A crushing blade forms a triangular scooping part, and a part of the coarsely crushed material is scooped up and returned. At this time, an arcuate reinforcing plate may be attached to the scooping portion so as to sequentially approach the outer periphery of the blade edge as it reaches the pointed portion. Alternatively, it may be a bridge-shaped reinforcing plate that straddles a triangular scooping portion.

[0006]

With the rotation of the crushing roller, the roughly crushed material is collected in the scooping part by the screw-shaped crushing blades whose left and right twist directions are opposite. The collected coarsely crushed material is scraped up by the scooping section and effectively returned to the crushing section.

[0007]

1 to 4 show an embodiment of the present invention. The crushing machine 1 comprises a pair of upper crushing rollers 2 and 3 and a lower crushing roller 4 arranged below the upper crushing rollers 2 and 3. These are housed in a casing 5 and rotated by a hydraulic motor or the like.
Reference numerals 6, 7, and 8 are drive shafts for the crushing rollers 2, 3, and 4, respectively. The one crushing roller 2 is the crushing roller according to the present invention, and screw-shaped crushing blades 10 and 11 are provided from the center to the left and right, and the twisting directions are opposite to each other. The supplied coarse material (not shown) is formed in a direction to draw it toward the center side.

Reference numeral 12 is a triangular scooping portion formed by matching both crushing blades 10 and 11. A reinforcing plate 13 is provided on the scooping portion 12 if necessary. The reinforcing plate 13 has a substantially isosceles triangular shape, and as shown in FIG. 3, the base is welded to the roller body 2a, and the tip is curved to a diameter close to the outer circumference of the pointed head 12a formed by the crushing blades 10 and 11. It is formed and both sides are welded to the crushing blade. As another embodiment, a hollow triangular scooping part may be formed by welding a reinforcing plate 13 in a bridging manner across both the crushing blades 10 and 11 at an appropriate position of the triangular scooping part 12. The other crushing roller 3 is provided with crushing blades 15 and 16 corresponding to the crushing blades 10 and 11 of the crushing roller 2 with their twist directions reversed. Although the scooping portions may be formed by the crushing blades 15 and 16 similarly to the crushing blades 10 and 11, the drawing shows an example in which a space portion D is formed between the blades. This is to facilitate the biting of coarse objects.

In the figure, 20 is a crushing blade provided on the lower crushing roller 4, 21 is a cutter, and 22 is an auxiliary guide.

In the above structure, the upper crushing rollers 2, 3
By rotating in the directions of arrows A and B, the supplied coarse material is bitten and crushed. Then, the coarsely crushed material crushed in FIG. 4 is fed into the space C, and the lower crushing roller 4
Then, it is crushed again by the upper crushing roller 3 on one side, further pulverized by the cutter 21 and the lower crushing roller 4, and discharged downward.

At the same time, the crushing blades 10, 11 and 15, 16 of the upper crushing rollers 2, 3 gather the coarsely crushed materials in the space C toward the central portion as they rotate. This center part has a scooping part 1
2 is formed, and the collected coarsely crushed material is the scooping part 1
It is scraped up by 2 and returned to above the crushing roller 2,
The crushing by the upper crushing rollers 2 and 3 is repeated again.

At this time, when the reinforcing plate 13 is provided on the scooping part 12, the blade of the scooping part 12 can be reinforced and the coarsely crushed material can be pressed against the inner wall of the housing 5 to be crushed.
Further, in the above embodiment, the scooping part 1 is provided only on one upper crushing roller.
Although the example in which 2 is provided is shown, a scooping portion may be provided in the other crushing roller.

[0013]

As described above, according to the present invention, at least one of the upper crushing rollers is provided with a pair of screw-like crushing blades whose twist directions are opposite to each other,
Since the triangular scooping portion is formed by both the crushing blades, the coarsely crushed material accumulated under the crushing roller can be returned to the upper side of the scraping roller by the rotation. Therefore, excessive coarse crushed material is not compressed and accumulated between the upper crushing roller and the lower crushing roller, and it is possible to prevent a decrease in work efficiency, a failure, and the like due to this. At this time, when the scooping part is provided with a reinforcing plate which gradually approaches the outer circumference of the cutting edge as it reaches the tip, it is possible to reduce the load applied to the cutting edge of the scooping part and to crush it at the same time.

[Brief description of drawings]

1 to 4 relate to an embodiment of the present invention, and FIG. 1 is a plan view of a crusher.

FIG. 2 is a front view of a scooping portion.

FIG. 3 is a sectional view taken along line XX in FIG.

4 is a cross-sectional view taken along the line YY in FIG.

FIG. 5 is a plan view of a conventional crusher.

6 is a cross-sectional view taken along the line ZZ in FIG.

[Explanation of symbols]

 1 Crusher 2 Crushing roller 3 Crushing roller 10 Crushing blade 11 Crushing blade 12 Scooping part 13 Reinforcing plate

Claims (2)

[Claims] 1. A parallel crushing upper roller and a lower crushing roller arranged below the crushing roller, crushing coarse particles by the upper crushing roller and finely crushing the crushed coarse material by the lower crushing roller. In the coarse crusher to be crushed, at least one crushing roller of the upper crushing roller is provided with a pair of screw-shaped crushing blades whose twisting directions are opposite to each other, and a triangular scooping portion is formed by both crushing blades. A crushing roller for a coarse crusher, which scoops up and returns a part of the crushed material. 2. A crushing roller for a coarse-sized crusher according to claim 1, wherein a reinforcing plate is attached to the scooping portion, and the reinforcing plate is formed into an arcuate shape which sequentially approaches the outer circumference of the cutting edge as it reaches the pointed portion. .