JPH02157072A - Multistage screening device for powder and grain - Google Patents

Abstract

PURPOSE:To obtain an automatic screening device for powder and grain easily exchangable for a different type of screen by providing a vibration mechanism for vibrating a movable frame main body, a screen clamping mechanism pro vided on one side of a support frame and a screen positioning mechanism. CONSTITUTION:Screens 36 of finer mesh and screens 36 of large mesh are piled up on receivers 35 starting with the finest mesh first on which screen are piled up in the order of mesh fineness. When piling up is finished, a screen clamping mechanism B is operated. A vibration mechanism A is operated in the state of clamping the receivers 35 and screens 36. Samples in the respective screens 36 are dropped successively by said rocking and screening. When screen ing is completed, a screen positioning mechanism C is operated. Thus, the receivers 35 and the screens 36 on a movable frame main body 1 are taken out one by one from the top downwardly.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a multistage sieving device for sieving each particle size in order to measure the particle size of powder materials such as ore, coal, coke, and limestone. It is something.

[Conventional technology]

As a conventional technique for measuring the particle size after sieving powder and granules,
There is one disclosed in Japanese Patent Publication No. 60-43189.

As shown in FIG. 4, the above-mentioned conventional technology stores a plurality of sieve frames a having meshes classified by particle size that become smaller toward the bottom and a sieve frame a' having a bottom plate without a mesh at the bottom in a stacked state. It is attached to a case b, and the bottom frame f of this storage case b is supported on a base d by a plurality of movable support fittings C, and is made to vibrate by a vibrating device e provided at the bottom of the storage case b. .

Each of the sieve frames a' and a is swingably attached at its rear end to the side frame of the storage case b by a shaft g, and a cylinder for tilting each of the sieve frames a is provided on the bottom frame f. .

At the front of each of the sieve frames a and a', there is a mechanism that opens under its own weight when the sieve frames a and a' are rotated downward, closes when it is in a horizontal state, and is driven by an electromagnetic cylinder (not shown). Each sieve frame and the gate plate 1 to be locked are rotatably provided by a locking device (not shown).

Furthermore, the sample receiver is provided with a chute j above the sieve frame a at the upper end, and the lower receiver is provided with a chute k near the bottom of each sieve frame a and a' in the 11'' direction.

The effect of the above-mentioned prior art is that first, all sieve frames a and a'
While the sieve frames a and a' are maintained horizontally by the locking device, the vibrating device e is operated to vibrate each sieve frame a and a' together with the storage case b.

Meanwhile, the samples collected at the required locations are placed in the top sieve frame a.
When the sample is put into the sieve, the powder particles smaller than the size of the sieve fall into the sieve frame a at the bottom one by one, and when the smallest particle size reaches the sieve frame a at the bottom, the sieve is finished. finish.

When the sieving is completed as described above, the locking device of the lowermost sieve frame a' is released and the lowermost sieve frame a is released by the cylinder h.
When only the sieve frame a' is tilted downward, the gate plate i of the lowest sieve frame a' opens, and the finest sample inside it is transferred to the chute k.
is discharged.

Next, the locking device of the second sieve frame a from the bottom is released, and the second sieve frame a from the bottom is tilted downward by its own weight.

Thereafter, similar operations are repeated until the discharge of the sample in the uppermost sieve frame a is completed, thereby completing the operation.

[Problem to be solved by the invention]

When sieving a sample, if the type of powder or granular material to be sieved is different, it is necessary to replace the sieve frame with a sieve frame having a different mesh size.

However, in the structure in which the sieve frames a and a' are attached to the storage case b by the shaft g as described above, it is extremely troublesome to remove the shaft g each time the sieve frame a is replaced. There is a problem in that it is impossible to make the frame a automatically replaceable.

This invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a device for sifting powder and granular materials that can be automated and that allows for easy change of different sieves. .

[Means to solve the problem]

In order to achieve the above object, the technical means taken by the present invention include a movable frame main body that is movable via wheels on a base, a shaking mechanism that vibrates the movable frame J/main body, and a A support frame installed at intervals on the frame body, a sieve clamp mechanism provided on one side of the support frame, a moving roller supported on the frame body, and a moving roller supported on the frame body. The invention also has a sieve positioning mechanism.

Further, a rear frame is provided on the movable frame main body at the rear between the support frames.

[Effect]

First, one receiver and a plurality of sieves are stacked on a moving roller of a moving frame main body and fixed by a sieve clamp mechanism. Next, the shaking mechanism is activated to swing the movable frame body back and forth, and in this state, a sample is introduced from above the sieve and sieved.

After sieving, the shaking mechanism is stopped and the sieve clamping mechanism is released.

After the sieve clamp mechanism is released, the sieve positioning mechanism is operated to move the sieve stopped at an arbitrary position to a fixed position, and at this position, the sieves containing the sieved samples are sequentially taken out by a transport means (not shown).

By moving the sieve to the fixed position regardless of the stop position of the movable frame body as described above, automatic removal by the conveying means becomes easy.

〔Example〕

In the embodiment shown in FIGS. 1 to 3, reference numeral 1 is a moving frame body with wheels 2 at the bottom, and this body 1 is moved along a rail 4 on a base 3 by means of a shaking mechanism as shown in FIGS. Moves back and forth in the left and right direction with a constant stroke.

The shaking mechanism A is constructed as follows.

An arm 6 having a long groove 7 is provided at one end of the rotating shaft portion 5 supported by a bearing on the base 3, and a variable stroke slide 8 having a crankshaft portion 9 is fitted into the long groove 7 of the arm 6.

Although the variable slide 8 mentioned above is omitted from the illustration, the amount of eccentricity can be adjusted by adjusting the adjustment bolt! After adjustment, it is positioned using a lock nut.

The rotating shaft portion 5 is installed on a machine stand 10 and rotated by a motor 11 via a reduction gear 12, a sprocket 13, a chino 14, and a sprocket 15.

On the other hand, the other end boss portion 16a of the rod 16 is attached to the crankshaft portion 9.
and connect the other end to the movable frame main body 1.

With the above configuration, the crankshaft 9 is caused to perform a crank motion by rotating the rotating shaft 5, and this crank motion is transmitted to the rod 16 to cause the movable frame body 1 to reciprocate.

Reference numerals 17 and 18 are support frames installed on both sides of the main body 1, and between the opposing surfaces 17a and 18a is a sieve 3, which will be described later.
The length is set larger than the length of 6.

Reference numeral 19 denotes a rear frame provided at the rear between the two frames 17 and 18.

Both frames 17 and 18 and the rear frame 19 form a sieve storage space surrounded by three sides and open at the front.

Reference numeral 20 denotes movable rollers arranged in parallel on the upper part of the movable frame main body 1, on which a plurality of sieves, which will be described later, are piled up.

B is a sieve clamp mechanism, which is constructed as follows.

Reference numerals 21 and 22 denote a pair of upper and lower levers that are swingably supported on the Zabo I frame 18 by means of a pin 23, and the tip of each lever 21 and 22 protrudes from the opposing surface 18a of the support frame 18. At the end, the sieve holding plate 24 is rotatably supported vertically by a bottle.

24δ is a corner holding plate of the sieve.

The lower bin 23 rotates together with a lever 21.22, and on the opposite side from this lever 21.22, a pair of upper and lower drive levers 25.26 that rotate together with the bin 23 are provided. The ends are connected by a connecting member 27.

A pin 28 is projected from both sides of the lower portion of the connecting member 27, and a rod 29a of a cylinder 29 which is swingably supported by the support frame 18 is connected to the pin 28.

In the above configuration, by operating the cylinder 29, the connecting member 27 and the levers 21, 22 rotate together with the bin 23, thereby causing the sieve retainer 24 to move upward and retreat.

C is a sieve positioning mechanism, which is constructed as follows.

That is, a horizontal backing plate 3 is installed on the support frame 17 side via a support stand 30 erected from the base 3.
The base 3 is attached to the cylinder 31 with 2 and the support frame 18 side.
It consists of a stopper plate 34 erected via a support stand 33 from above. The stopper plate 34 can be adjusted in the horizontal direction using an adjustment bolt (not shown).

Next, the operation of the above embodiment will be explained.

(a) Stacking the sieves With the presser plate 24 of the sieve clamp mechanism B retracted to the position indicated by the imaginary line in FIG. 2, the sieves 36 are stacked one after another on the movable roller 20 of the movable frame main body 1. Here, the lowest stage is a receiver 35, on which sieves 36 from small to large sieves are placed on support frame 17 and rear frame 19.
Stack them to the side. This stacking is performed by a transport means such as a transport robot (not shown).

(b) Operation of the sieve clamp mechanism When the receiver 35 and the sieve 36 are stacked, the sieve clamp mechanism B is operated.

That is, by operating the second cylinder, the holding plate 24 in the backward position is moved forward, and the sides of the receiver 35 and the sieve 36 are pressed against the support frame 17.

Therefore, the receiver 35 and the sieve 36 are attached to the support frame 1.
7, the rear frame 19, and the presser plate 24, the movable frame body 1 is fixed onto the movable frame body 1. Note that at this time, the sieve positioning mechanism C is retracted so as not to hit the sieve 36.

(C) Operation of the shaking mechanism With the receiver 35 and the sieve 36 clamped, the shaking mechanism A is operated. When a sample is put into the top sieve 36 and the motor 11 is started, the movable frame main body 1 is pushed through the rotating shaft section 5, arm 6, slide 8, crankshaft section 9, and rod 16, and then pulled in (as shown in the figure). (left/right direction) repeat the action. Due to this shaking motion, the samples in each sieve 36 fall one after another and are sieved. When the sieving is completed, the shaking mechanism A is stopped, and then the sieve clamping mechanism B is released.

B) Operation of the sieve positioning mechanism When the shaking mechanism A is stopped, the stopping position of the frame body 1 is not necessarily constant. In this state, the sieve positioning mechanism C is operated.

That is, by the operation of cylinder 31, this cylinder 3
The backing plate 32 of No. 1 presses the side of the receiver 35.

Due to this pressing, the receiver 35 and the sieve 36 move 1'J-
It moves on the roller 20 and stops when it hits the stopper plate 34.

In this way, the receiver 35 and sieve 36 on the movable frame main body 1 are sequentially taken out from above by a conveyance means such as a stationary conveyance robot (not shown), and the next processing step (weighing, discharging, etc.)
It is transported to

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

Since the sieves are stacked on the movable frame body, sieves with different mesh sizes can be easily changed for sieving a wide variety of samples.

In addition, since the sieve is placed on the moving roller of the moving frame body and moved by the sieve positioning mechanism, the sieve can be stopped at a fixed position no matter where the frame body stops. can. Therefore, the sieve can be reliably taken out by the conveying means, which is useful for automation.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a side view of the same, and FIG. 4 is a longitudinal sectional front view showing a conventional example. 1...Moving frame body, 2...Wheels, 3...Base, 1
7.18...The Boat Frame, 20...
...Moving roller, A... Shaking mechanism, B... Sieve clamp mechanism, C... Sieve positioning mechanism.

Claims (2)

[Claims] (1) A movable frame body movable via wheels on a base, a shaking mechanism that vibrates the movable frame body, a support frame erected at a distance from the movable frame body, and a support frame that vibrates the movable frame body; A multi-stage system for powder and granular materials characterized by having a sieve clamp mechanism provided on one side, a moving roller supported on the main body of the moving frame between the support frames, and a sieve positioning mechanism erected on the base. Sieving device. (2) The multi-stage sieving device for powder and granular materials according to claim 1, characterized in that a rear frame is provided on the movable frame main body at the rear between the support frames.