JPS6128387B2 - - Google Patents

Description

Claim 1: A self-cleaning screen that accommodates a lump of material larger than a predetermined size, and the screen is moved from a horizontal position where separation work is performed to a vertical position where discharge work is performed. death,
A particle size sorter comprising a moving device for moving the screen again to a sorting work position, and a track consisting of a horizontal portion and a downwardly curved portion connected to the horizontal portion to guide the screen, comprising: a carriage 2; , in order to rotatably support the screen 3 thereon, a pivot 13 provided on the carriage 2 passes through the center of gravity of the screen 3 in the lateral direction.
The carriage 2 engages with the fixed horizontal beam 1 on the lower side to move the carriage 2 in the horizontal direction.
The screen 3 is guided by first wheels 4 provided on both sides of the screen 3 and tracks provided on each horizontal beam 1.
two second wheels 5 mounted at the rear end, when the second wheels 5 are at the bottom of the curved section 12 of the track, the screen 3 discharges the material to be sorted and the second wheels 5 5. A particle size sorter characterized in that the material is separated when 5 comes to the front of the horizontal portion 11 of the track.

2. The moving device consists of two symmetrically arranged wires 7, each connected to a bracket 10 at the rear end of each beam 1 and connected to a circle attached to the front end of the carriage 2. through the plate 9 and then to a pulley 8 mounted symmetrically on the beam 1 on the opposite side of the axis of symmetry 14 pointing in the longitudinal direction of the carriage, and further to the release lever 6, which releases the lever 6. The carriage 2
When the wire 7 is moved away from the wire 7, the wire 7 is pulled and the disk 9 is pushed.
2. The particle size sorter according to claim 1, wherein the particle size sorter is separated from the release lever 6 and moved toward the rear end of the beam.

3 The disk 9 is attached to two locking devices adapted to secure the carriage 2 when the screen 3 is in the sorting working position, each locking device being pivotable to the front end of the carriage 2. It consists of a plate 16 which is attached so as to
The hook 15 is pushed into a corresponding hook mounted on the beam, and when the release lever 6 is moved away from the carriage and the wire is pulled, the locking device is released and the carriage is freed. A particle size sorter according to claim 1 or 2, characterized in that the particle size sorter is configured to:

4. A return spring 20 is attached to the rear end of each beam and is pushed by the return movement of the carriage 2 to absorb and store the kinetic energy of the sorting materials of the carriage 2 and the screen 3; 3. Granule size according to any one of claims 1 to 3, characterized in that the spring 20 is adapted to release its absorbed energy to return the carriage to a locked position at the front end of the beam. Sorting machine.

5 a double-acting hydraulic cylinder 18 with a displacement device attached to each beam 1 in its longitudinal direction;
and a piston connected to the carriage for reciprocating the carriage, and said hydraulic cylinder is mechanical-electric;
Alternatively, the particle size sorter according to claim 1 is adapted to be operated by an electronic-electric control valve.

Description The present invention relates to a particle size sorter. This machine is composed of a self-cleaning screen that is designed to retain materials larger than a predetermined size among lump materials, and the screen is separated by a moving device. It is possible to move from a horizontal position to a vertical position where the discharging operation is performed, and then move forward again to the sorting operation position. The screen is therefore guided by a track consisting of a horizontal section and a downwardly curved section connected thereto.

Such a particle size sorter is used to sort out larger particles from block-like materials used for leveling the soil at construction sites and construction sites, for example, by cutting them into blocks using a frame stone machine.

When a frame stone machine is used for a long period of time, sometimes larger frame stones become tightly packed between the baffle plates, and its operation is interrupted. Removing these framework stones requires a great deal of effort and time, during which time the production of the framework plant is greatly reduced.

It would therefore be highly desirable to have a machine which would pick out the larger pieces of rock before it is introduced into the frame machine, thereby ensuring continuous operation.

Bulky materials are used as finishing fillers in soil leveling and roadbed laying, but from a safety standpoint, at construction sites, almost uniform materials are used as much as possible to form the base layer. It is desirable to use safe materials for construction. This problem can be greatly resolved if inappropriately sized materials can be screened out.

U.S. Patent No. 2396954, U.S. Patent No. 2690840
No. 3,402,816 discloses a particle size sorter with a screen that can be rotated upward to discharge the sorted material. Each of the above-mentioned patent specifications relates to a screen that is rotatable about an axis at one end of the screen. This means that the distance from where the sorted material falls to where it is discharged is relatively short. Ejecting the sorted material sometimes requires significant force, depending on the amount of material being ejected. This evacuation operation is performed by an engine, mechanical transmission, or hydraulic power.

U.S. Pat. No. 1,685,823 discloses a screen that can be moved by wheels on a track that includes a horizontal section and a curved section, the screen being pushed until the wheels enter the curved section. The material to be sorted is then discharged, but the spring is also stretched, which causes the screen to
You will be immediately returned to your starting point. Since the entire screen is relatively heavy and pivotable, the center of gravity is located quite low and requires very strong springs that can exert enough energy to return the screen correctly to its starting point. Is required.

Norwegian Patent No. 117159 discloses a screen with two sets of wheels. Each pair of these wheels is guided in a track at an acute angle to each other. According to this method, the screen discharge operation is not sufficiently controlled. This is because when the weight applied to the protruding portion exceeds a certain amount, the screen begins to move toward the discharge position, and when the material to be sorted is discharged, the weight balance shifts significantly, and the center of gravity shifts to the protruding portion. This is because if it moves from the beginning, it will perform a return operation. To begin the screen discharge operation, it is desirable to load the material onto the projections of the screen as much as possible.

In the last two patent specifications mentioned above, the screen is not capable of being reliably moved back to the sorting position.

The object of the present invention is to be able to effectively discharge the sorted material to a place sufficiently far from the place where the sorted material falls, to be able to reliably return the screen to the starting point, and to have a simple structure. It is an object of the present invention to provide a particle size sorter that is both durable and durable.

The particle sizer according to the invention is of the type described above and is in the form of a portal, into which a transport vehicle can enter. The screen of the particle sizer is pivoted on a transverse axis passing approximately through its center of gravity in bearings on both sides of the carriage. This carriage can be moved horizontally by means of wheels on both sides of the carriage, and can roll on fixed horizontal beams of the particle sizer located below both sides of the carriage. At the rear end of the screen are two wheels, each wheel guided by a track on a horizontal beam. The screen is in the sorting material discharge position when its wheels are at the bottom of the curved section, and in the sorting working position when its wheels are at the front of the horizontal section of the track.

The movement device of the particle sizer consists of two symmetrically arranged wires. Each wire is connected to a bracket on the back end of the beam.
through a disc attached to the front end of the carriage,
It is then guided to a pulley mounted symmetrically on a beam opposite the longitudinal axis of symmetry of the carriage, and further to a release lever. When the release lever is moved away from the carriage, the wire is pulled, and by pushing the disk, the carriage is released from the release lever.
Move it toward the rear end of the beam.

The disk is attached to two locking devices adapted to secure the carriage when the screen is in the sorting position. Each locking device consists of a plate pivotally mounted on the front end of the carriage, on which a hook is provided which is loaded by a spring. The hook is pushed into a corresponding hook mounted on the beam. When the release lever is moved away from the carriage and the wire is pulled, the locking device is released and the carriage is free.

A return spring is attached to the rear end of the beam and is biased by the backward movement of the carriage to absorb the kinetic energy possessed by the carriage and screening material of the screen. The spring returns the carriage to the locked position at the front end of the beam by releasing its absorbed energy.

In another embodiment of the invention, the mobile device comprises:
It consists of a double-acting hydraulic cylinder attached to each beam along its length, and a piston connected to the carriage for reciprocating the carriage. The hydraulic cylinder is
Operated by mechanical-electrical or electronic-electrical control valves.

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

Fig. 1 is a side view of the particle size sorter of the present invention, Fig. 2 is a plan view of the wire device, Fig. 3 is a detailed view of the plate of the locking device, and Fig. 4 is a hydraulic cylinder for operating the carriage. It is a perspective view showing an example.

The carriage 2 can be moved on the beam 1 by wheels 4. The carriage 2 includes a frame, and a screen 3 is attached within the frame. The screen 3 is supported by a pivot 13 on an axis passing approximately through its center of gravity.

Two wheels 5 are attached to the screen 3, and each wheel 5 can roll on a horizontal portion 11 and a curved portion 12 that are continuous with each other on a track provided on each beam.

The rock material is introduced into the screen 3 and the separated material is passed through the screen 3 onto a suitable conveying machine (not shown) located below the beam 1, i.e. in the portal frame of the particle sizer. fall into.

After the filling machine, for example a shovel loader, has brought the material onto the screen, it pulls the release lever 6 to the left in FIG. The wire 7 is then pulled and the locking plate 16 is oriented in the direction of the central symmetry axis of the particle sizer. Thereby, the lock plate 16 is released and the loaded carriage 2 is moved to the right in FIG. This movement is caused by pulling the wire 7 between the pulley 8 and the wire bracket 10 in a direction opposite to the disc 9 on the carriage.

As the carriage moves to the right in FIG. 1, the screen remains in the same position until the wheels 5 enter the curved portion 12 of the track. after that,
The screen is rotated so that its top surface forms an angle of 90° or less with the horizontal plane. As a result, the sorted material falls to the right side of the particle sizer, as shown in FIG.

When the screen reaches the ejection position, the carriage 2 has compressed the return spring 20. after that,
The spring 20 releases its absorbed energy, thereby pushing the carriage 2 back to the left in FIG. The spring 20 absorbs the energy exerted by the carriage carrying the sorting material, and this energy is of sufficient magnitude to return the carriage 2 to its starting point.

When the screen 3 returns to its starting point, it is in its sorting position and the lock plate 16 engages another hook on the beam 1. The carriage is thereby fixed in this position.

When the carriage 2 returns to its starting point, the disc 9 tightens the wire 7 and returns the release lever 6 to its vertical initial position. When the carriage 2 is at the starting point, the spring 17 presses against the lock plate 16 and carries the hook on the lock plate in the opposite direction from the axis of symmetry of the particle sizer, engaging another hook (not shown) on the beam. Match.

In another embodiment of the invention, two double-acting hydraulic cylinders 18 are used to move the carriage 2 from the starting point where the screen 3 performs the sorting operation to the rear where the discharge operation takes place. The hydraulic cylinder 18 then moves the carriage to the starting point. Hydraulic cylinders have a constant cycle of operation consisting of repeated operations. This operating cycle can be initiated, for example, by a signal from a radio control device on the filling machine or a mechanically actuated electric switch.