JPS6221590B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for separating leftover soil generated during road construction, building foundation work, etc. into earth and sand and other foreign matter (stone lumps, etc.) of a certain size or larger.

Generally, the remaining soil generated during road construction and construction foundation work, etc. is earth and sand, earth clods and stone blocks, concrete blocks,
It is mixed with asphalt lumps and the like, and its viscosity and water content ratio vary, making it extremely difficult to reuse it as it is.

The purpose of the present invention is to efficiently sieve these residual soils that cannot be sieved using conventional sieving machines. When a foreign object (stone lump, etc.) larger than the size of the opening comes, a crusher is installed on the sieve surface, which has a mechanism that allows it to escape above the sieve surface due to the difference in crushing resistance.The soil clod is crushed and becomes a product under the sieve, and the foreign material is removed. When particles are present, the crusher escapes above the sieve surface and sends out only these foreign substances onto the sieve surface without crushing them, allowing them to be removed as products on the sieve.

However, by using a vibrating sieve made of grizzly bars, the sieve surface can be
The supporting structure of the grizzly bar is simpler than that of the original patent (No. 60-006711), in which adjacent sieving bars on the sieving surface are sieved by shifting the phase of each other by 180 degrees and repeating alternating circular motions. This allows it to be applied directly to conventional ripple flow type vibrating sieve screens and grizzly feeders.

The embodiments shown in the drawings will be explained below. The illustrated one shows a grizzly feeder, and a sieve frame 1 has grizzly bars 2 with openings of an appropriate size to form a sieve surface. In the illustrated one, a grizzly bar 2 is installed in the flow direction with respect to a deck cross beam 3, and the sieve surface is configured in two stages, upper and lower.

The sieve frame 1 is supported by a machine frame 5 with support springs 4, and a low-head type oscillator 7 is attached to a cross beam 6 for attaching a motor stand.

Therefore, when the motor is driven, the low-head type oscillator 7 causes the entire sieve surface to vibrate as shown by the arrows in the figure.

In the present invention, a crusher 8 is installed on the sieve surface as described above, and its rotary blades 9 are inserted between the grizzly bars 2, and the drive shaft 11 is supported on the side plate of the sieve frame 1 via a bearing 10. Rotational motion is applied by an electric motor 13 through a drive mechanism 12 in the direction of the arrow in the figure. Further, this crusher 8 has a structure in which the arm portion of the drive mechanism 12 is supported by the lower end of a spring 14 whose upper end is supported by the sieve frame 1, and provides adjustable precompression toward the sieve surface.
If a force greater than the given precompression is applied, the spring 14 is lifted and rotated around the drive shaft 11 above the sieve surface, leaving the grizzly bar 2 and moving upward. Note that 15 indicates the bottom plate of the raw material input section. Now, if a suitable loading machine such as a dump truck, bulldozer, power shovel, or shovel hoe is used to load raw material residue with a high viscosity and high water content containing clods and foreign matter onto the sieve surface, the movement of the grizzly bar 2 will sieve the sieve without clogging. They are separated and sent onward.

During this sieving, the soil clods are crushed by the rotating blades 9 of the crusher 8 to form an under-sieve product.

When a foreign substance with a lump diameter larger than the opening of the grizzly bar 2 comes, the foreign substance is not crushed, but lifts up the spring 14, escapes the crusher 8, is sent out onto the sieve surface, and is sent out of the sieve frame 1 as a sieve product. Excluded from emissions.

This device is most suitable for removing foreign matter larger than a certain size from raw materials containing clods and foreign matter that cannot be treated with conventional cutting-type sieving machines.

Additional Relationships The present invention provides a crusher consisting of rotary blades on the sieve surface, and uses a mechanism to release the crusher upwards from the sieve surface only when a force greater than a certain arbitrary predetermined force is applied. This is an improvement on Patent No. 1286012 (Special Publication No. 60-006711) supported on a sieve frame, and in the original patent, the sieve is equipped with a sieve in which adjacent bars of grizzly or bardecks move alternately. However, since the support structure of the bars is complicated, in the present invention, the support structure of the bars is made simpler by using a vibrating screen in which each bar moves integrally, and the support structure of the bars is simpler than the conventional one. The device of the present invention is characterized in that the device of the present invention can be obtained only by attaching a crusher to the vibratory sieve.

[Brief explanation of the drawing]

FIG. 1 is a front view of this device. FIG. 2 is a plan view of this device. FIG. 3 is a side view of the device. 1...Sieve frame, 2...Bar, 8...Crusher, 9...
...Rotating vane, 14...Spring.

Claims (1)

[Claims] 1. A vibrating sieve with a sieve surface in which a plurality of Grizz Rivers move integrally, a crusher consisting of rotating blades is installed on the sieve surface, and an elastic sieve whose other end is supported by a sieve frame is installed to pre-compress toward the sieve surface. A sieving device that supports the crusher with members.