JPH0128830Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) In recent years, the amount of leftover soil generated from construction sites has increased enormously. This surplus soil used to be reclaimed on the coast or dumped inland, but recently restrictions on these disposal sites have become stronger, and it has become difficult to collect mountain sand for backfilling due to environmental damage, making it difficult to dispose of by dumping. It is becoming. Therefore, various plants have been developed that can improve the soil quality and reuse this residual soil. The movable grizzly is a device that separates and removes lumps such as coarse stones, asphalt, and concrete in this plant, and the crusher attached to this movable grizzly is a device that breaks up soil clods.

The present invention relates to an improvement of this crusher.

(Prior Art) A movable grizzly is shown, for example, in a plan view in FIG. 3 and in a side view in FIG. 4, in which a plurality of sieving bars 9, 9, . , a set 20 of two drive shafts, both of which are arranged in parallel.
A, 20b and one of 21a, 21b are alternately connected via connecting plates 22a or 22b.
The sieving bars 9, 9,..., 9 are drive shafts 20a, 20
b, 21a, and 21b rotate, and are divided into two groups, 9a and 9b, and alternately move up and down by the action of a plate cam (or eccentric shaft). Each drive shaft 20a, 20b, 21
a, 21b are driven by a motor 23 or 24, and the drive shaft 20b is rotated so that their rotations are perfectly matched.
A chain 25 is installed between the drive shaft 21a and the drive shaft 21a. These drive shafts 20a, 20b, 21a,
21b are both supported by the side plate 4 fixed to the inclined upper frame 27 of the pedestal 26.

The crusher is installed on this movable grizzly, and includes a rotary crushing blade 3 and an arm 2 that pivotally supports the rotary crushing blade 3 at its tip.
and a drive mechanism for the rotary crushing blades 3.

Each rotary crushing blade 3, 3, . . . , 3 is fixed to a shaft 28 so as to be located between the sieving bars 9, 9, . This shaft 28 is the motor 29
It is designed to rotate via a chain. A pair of arms 2, 2 supporting both ends of the shaft 28 are each shaped like a "he", and their curved portions are pivoted. A rod 30 is passed to the rear ends of the arms 2, 2, and the rod 30 is stopped by a stopper (not shown).
The rising range of the rotary crushing blades 3 is regulated to prevent the rotary crushing blades 3 from lowering too much. Further, this arm 2 applies a downward force to the rotary crushing blade 3 by the repulsive force of a coil spring 31 connected to the intermediate portion.

(Problem to be solved by the invention) In such a crusher, all of the rotary crushing blades 3 are fixed to one shaft 28, so when a block of stone, concrete, etc. passes, all the rotary crushing blades are There was a problem in that when the blade 3 rose, it also allowed clods of soil to pass through. This not only resulted in a decrease in the recovery rate of earth and sand, but also created a burden on the use of stone blocks, etc.

In addition, since the coil spring 31 is used as a force to push the arm 2 downward, this force increases as the rotary crushing blade 3 rises, and once the coil spring is fully contracted, it cannot rise any further, and as a result, There were cases where stone blocks etc. could not pass through the rotary crushing blades 3. The stone blocks and the like accumulated in front of the rotary crushing blade 3 constantly hit the rotary crushing blade 3 and not only produced noise but also sometimes caused damage to the rotary crushing blade.

(Means for solving the problem) The present invention was made to solve the above problem, and each arm having a rotary crushing blade arranged above the movable grizzly is independent of each other. It is characterized in that the arm is provided so as to be able to rotate downward as a unit, and a motor that drives and rotates the rotary crushing blade is installed on the arm.

The position of each arm on the movable grizzly may be a normal position, and the shape, support portion, etc. of each arm may be the same as conventional ones.

Usually, one or two rotary crushing blades are attached to each arm, but it is also possible to attach three or four rotary crushing blades. The number of arms is two or more, and usually about 3 to 15. The means for independently rotating each arm is not limited; for example, a shaft may be fixed to the arm and both sides of this shaft may be supported by bearings, or the arm may be fitted so as to be rotatable about the shaft. good.

(Function) Each arm rotates upward independently, and when a lump of concrete or other difficult-to-crush material passes through, only the arm in that area rises, and the rotating crushing blades of the other arms continue to move. Continue crushing.

Further, this arm is constantly pushed downward by the weight of the motor that drives and rotates the rotary crushing blades installed there.

(Example) A side view of a crusher which is an example of the present invention is shown in the first example.
and a front view is shown in FIG. 2, respectively.

As shown in Figure 1, the crusher is a movable grizzly 1
It consists of an arm 2, a rotary crushing blade 3 attached to the tip of the arm 2, and a drive mechanism thereof.

A side plate 5 of the crusher is connected to the upper part of the side plate 4 of the movable grizzly 1, and beams 6a and 6 are attached to the upper edge of the side plate 5 of the crusher.
b has been passed.

Three arms 2 of the same shape are used for the arm 2, and a shaft 7 that passes through the upper part of the curved part and is fixed is rotatably supported by a bearing 8 at the lower part of the beam 6a. .

One rotary crushing blade 3a is attached to each side of the tip of each arm 2, and each crushing blade 3a is disposed in the middle of the sieving bar 9 of the movable grizzly 1. In addition, a rotary crushing blade 3b with a slightly small diameter is attached to a rotating shaft 10 extending from one of the arms 2 at the intermediate portion of each arm 2, so that it can crush soil clods passing between them. ing.

The drive mechanism for the rotary crushing blades 3a and 3b (sometimes collectively referred to as 3) is the arm 2.
The motor 1 is mounted on the motor holder 11 protruding near the tip of the motor 1.
2 is mounted, and the rotating shaft 10 of the rotary crushing blade 3 is rotated via two endless chains 13 and 14.

In the present invention, this motor 12 is
Another feature is that the motor 12 is disposed at the tip of the rotary crushing blade 3, and the weight of the motor 12 is used as a force to press down the rotary crushing blade 3, thereby omitting the coil spring 31 shown in FIG. are doing. This method of arranging the motor 12 at the tip of the arm has the advantage of not only eliminating the possibility of failure of the coil spring 31 but also shortening the power transmission distance.

The rear end of the arm 2 is brought into contact with the beam 6b, thereby acting as a stopper. A rubber plate 15 is attached to the upper surface of the rear end as a cushioning material.

Regarding the operational relationship of the movable grizzly equipped with the crusher of the present invention, the residual soil 17 transferred from the conveyor 16 on the left side of FIG. It falls near the left edge of the drawing. Therefore, the earth and sand 18 fall through the gaps between the sieving bars 9, and lumps such as earth clots and concrete lumps move to the right in the drawing and reach the 3 parts of the rotary crushing blades. There, the soil clods are broken up and fall, resulting in difficult-to-break lumps such as concrete blocks19.
passes through the rotary crushing blades 3, falls from the right end of the sieving bar 9 in the figure, and is separated and collected.

(Effects of the invention) The crusher of the invention was able to reliably crush soil lumps without passing them through, and was able to increase the rate of separation and collection of earth and sand, stone lumps, concrete lumps, etc. This facilitates the processing or effective use of recovered stone blocks, concrete blocks, etc.

It was also possible to eliminate the accumulation of stone blocks, concrete blocks, etc. in front of the rotary crushing blade.

[Brief explanation of drawings]

FIG. 1 is a side view of a crusher which is an embodiment of the present invention, and FIG. 2 is a front view. FIG. 3 is a plan view of an example of a movable grizzly equipped with a conventional crusher, and FIG. 4 is a side view. 1...Movable grizzly, 2...Arm, 3,3
a, 3b...Rotary crushing blade.

Claims (1)

[Scope of utility model registration request] Each arm having a rotary crushing blade arranged above the movable grizzly is provided so as to be able to rotate upward independently and integrally, and a motor for driving and rotating the rotary crushing blade is installed on the arm. A mobile grizzly crusher.