JPH1030247A - Crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of crushing work by crushing concrete lump by providing large, middle, and small crushing tooth plates alternately in opposition in a scooping device of a civil engineering machine to form a crushing space. SOLUTION: A pair of rotary shafts 5, 6 are mounted in parallel above a discharge space in a bottom part of a bucket mounted on a turn arm of a civil engineering machine, and they can be turned by hydraulic motors 7, 8, respectively. Next, a plurality of sets of a small crushing tooth plate 10, a middle crushing tooth plate 11, and a large crushing tooth plate 12 are fixed on the shaft 5 across a predetermined interval, and a large crushing tooth plate 20, a middle crushing tooth plate 21, and a small crushing tooth plate are fixed on the shaft 6 and they are opposed to the tooth plates 10, 11, 12. Then, large, middle, and small crushing tooth projection pieces 30, 31, 32 are provided and protrude in correspondence to each tooth plate provided on the shafts 5, 6 on an inner face of the bucket. A zigzag crushing clearance K is formed in the bucket, the shafts 5, 6 are rotated to crush concrete lumps produced at the site where a building is disassembled, and they are discharged through the discharge space in the bottom part of the bucket. Consequently, it is possible to crush concrete lumps into small lumps having predetermined size by one time operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel idea of a crusher for scooping up concrete lumps and crushing them at a demolition site of a building or the like.

[0002]

SUMMARY OF THE INVENTION An object of the present invention is to provide a scooping device of an earth-moving machine having a function of accommodating a concrete lump or the like in a single operation so as to be crushed into a small size.

[0003]

The means of the present invention are as follows.

[0004] A pair of rotating shafts, which are rotated by a hydraulic motor and are opposed to a bottom discharge space of a scooping device such as a shovel or a bucket attached to the tip of a turning arm of a civil engineering machine, are arranged side by side, and one of the rotating shafts is large, medium or small. The required number of pairs of crushing tooth plates are fixed at a required interval, and the other rotating shaft is a small crushing tooth plate for a large crushing tooth plate of the rotating shaft, and a medium crushing tooth plate for a medium crushing tooth plate. In addition, for the small crushing tooth plate, the large crushing tooth plate is fixed opposite to the small crushing tooth plate, and large and small crushing tooth protrusions approaching each crushing tooth plate are integrally protruded on the inner peripheral surface of the scooping device. A crushing machine in which a zigzag crushing space is formed in a scooping device by a crushing tooth plate of each row and crushing tooth pieces on an inner peripheral surface.

[0005]

1 shows a bucket attached to the tip of a turning arm 3 of a civil engineering machine 2 and a bottom discharge space 4.
At the top, two parallel rotating shafts 5 and 6 are inserted, each of which is equipped with a hydraulic motor 7,8. Rotating shaft 5,
On one of 5, several sets of small crushing tooth plates 10, medium crushing tooth plates 11, and large crushing tooth plates 12 are sequentially arranged at required intervals.
Set) Fix. The other rotary shaft 6 has a large crush tooth plate 20 for the small crush tooth plate 11 of the rotary shaft 5, a medium crush tooth plate 21 for the medium crush tooth plate 11, and a large crush tooth plate 12 for the large crush tooth plate 12. The small crushing tooth plate 22 is fixed so as to face. Also bucket 1
The large, medium and small crush tooth protruding pieces 30, 31, and 32 are provided on the inner peripheral surface corresponding to the large, medium and small crush tooth plates provided on the rotating shafts 5, 6, respectively. Thus, the zigzag crushing gap K in the bucket 1
Is formed. The shape of the teeth of each crushing tooth plate and crushing tooth protruding piece is appropriately selected.

[0006]

According to the present invention, the zigzag crushing gap K is formed by alternately arranging the large, medium and small crushing tooth plates in the scooping device as described above. If the rotary shafts 5 and 6 are rotated while being inserted, the mass C is gradually crushed into a small size and is not sent out from the discharge space 4 until the lumps C are finely crushed. Therefore, it is possible to crush into a predetermined small size by feeding the lump C once, and the crushing efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a side view.

FIG. 2 is a longitudinal sectional side view of a main part.

FIG. 3 is a plan view.

FIG. 4 is a diagram showing an example of a tooth shape.

[Explanation of symbols]

 Reference Signs List 1 bucket 2 civil engineering machine 3 revolving arm 4 discharge space 5, 6 rotating shaft 7, 8 hydraulic motor 10, 22 small crushing tooth plate 11, 21 medium crushing tooth plate 12, 20 large crushing tooth plate 30 large crushing tooth protrusion 31 medium Crushed tooth tip 32 Small crushed tooth tip K Crushing gap

Claims (1)

[Claims] 1. A pair of rotary shafts, which are rotated by a hydraulic motor and opposed to a bottom discharge space of a scooping device such as a shovel or a bucket attached to a tip of a turning arm of a civil engineering machine, are arranged side by side, and one of the rotary shafts is large or medium. A plurality of sets of small crushing tooth plates are fixed at required intervals, and the other rotating shaft is provided with a small crushing tooth plate for the large crushing tooth plate of the rotating shaft, and a medium crushing tooth plate for the medium crushing tooth plate. For the small crushing tooth plate, the large crushing tooth plate is fixed opposite to the small crushing tooth plate, and large and small crushing tooth protruding pieces that approach each crushing tooth plate are integrally projected on the inner peripheral surface of the scooping device. A crushing machine in which a zigzag crushing gap is formed in the scooping device by the crushing tooth plates of each row and the crushing tooth pieces on the inner peripheral surface.