JPH0520476Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to the improvement of a vibrating sieve, and in particular, in a multi-stage vibrating sieve, the lower sieve screen stretched inside the main body of the vibrating sieve machine is made into a cassette type and can be accessed from the outside. This invention relates to a vibrating screen that can be easily replaced.

[Conventional technology]

Generally, asphalt concrete and the like require several types of crushed stone (non-sieve material) with different particle sizes, and therefore vibrating screens having multiple sieve screens are often used. In this type of multistage vibrating sieve, the sieve mesh becomes smaller from the upper stage to the lower stage, and the steel wires forming the mesh also become thinner. Therefore, the lower sieve screen is highly worn and needs to be replaced more frequently.

However, with such a vibrating screen, due to the mounting structure of the sieve screen (see Fig. 3b), in order to replace the lower sieve screen, the upper sieve screen must first be removed, and the replacement work is complicated and extremely complicated. It was inefficient and labor-intensive.

Therefore, in order to alleviate this problem to some extent, Jitsukaiaki
A vibrating sieve as described in Japanese Patent No. 51-113275 has been proposed. That is, as shown in FIGS. 3a and 3b, an appropriately sized opening 23 is formed in the side plate 22 of the sieve main body 21.
is provided to facilitate replacement of the lower sieve screen 24 through this opening 23.

When replacing the lower sieve screen 24, use the clamping bar 25 provided to tension the sieve screen 24.
Loosen the nuts 26a of the mounting bolts 26 of the side plate 2.
The worker inserts the upper body into the main body 2 through the opening 23 provided in the main body 2.
Insert the clamping bar 2 into the
5 inward to release the lock from the sieve screen 27, take out the worn sieve screen 27 (divided into appropriate sizes) from the opening 23, and insert a new sieve screen 2.
3 into the main body 21 in the reverse procedure to the above.

In the figure, 27a is a support frame installed between the side plates 22, and 27b is a support for stretching the sieve nets 27, which are erected at regular intervals on the support frame 27a, on an upwardly convex curved surface. . 28 is a vibrator, 29 is a coil spring for vibration absorption, and 30 is a chute.

[The problem that the idea attempts to solve]

Replacement work using such a narrow opening is extremely inefficient, inefficient, and labor-intensive. The more frequently the sieve screen is replaced, the more the burden on the operator increases.

Therefore, it is difficult to adopt the above-mentioned method for a vibrating screen for asphalt concrete, which has a screen screen that is frequently replaced.

Therefore, in view of the above-mentioned problems of the prior art, the purpose of the present invention is to form a unit in a cassette type so that the lower sieve screen can be inserted into and removed from the main body, so that the sieve screen can be replaced easily and efficiently from the outside. It is to make it.

[Means to solve the problem]

In order to achieve the above object, the present invention is a vibrating sieve in which a plurality of sieve screens are arranged in the sieve screen main body, the lower sieve screen is divided into an appropriate number of cassettes in the longitudinal direction, and these cassette-type sieve screens are divided into cassettes. Inverted L-shaped guided members are protruded from the upper four corners of the frame so as to face each other on the left and right sides, and a U-shaped guide member is provided extending in the depth direction at the lower part of the sieve body corresponding to the guided members. The cassette-type sieve screen is configured to be able to be inserted into and removed from the sieve main body by slidingly guiding the guided member along the guide member.

[Effect]

According to the above configuration, when the sieve mesh of the lower cassetted vibrating sieve is replaced due to wear, the cassetted vibrating sieve can be replaced from the outside of the vibrating sieve without removing the upper tier vibrating sieve. The lower sieve screen can be taken out from the main body along the guide member, replaced with a new screen outside, and then reinserted into the main body to set it.

In this case, since the guided member of the sieve screen can be inserted and removed while being guided along the guide member on the main body side, the removal and insertion work can be carried out quickly and smoothly with little effort. In addition, since it is a combination of a U-shaped guide member and an inverted L-shaped guided member, it is easy to arrange a plurality of cassette-type sieve screens in succession, and since it has vertical and horizontal restraint properties, it is less susceptible to vibration. On the other hand, it functions to stably hold these cassette-type sieve screens.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic side view of a multi-stage vibrating screen.

The main body 1 of the vibrating sieve machine has a coil spring 2 for vibration absorption.
It is placed on a base 3 by a support member 2 with a. A vibrator (vibrating body) 4 is provided at the upper part of the sieve main body 1, and is driven by a drive motor 5 via a belt 6 to induce vibration in an oblique direction.

There are multiple stages (in this embodiment, 5 stages) in the sieve main body 1.
Sieve screens 7, 7A are arranged on the stage). The mesh size of these sieve screens 7 becomes smaller toward the bottom,
The steel wire (piano wire) that forms the mesh is also becoming thinner. Examples of the mesh sizes are 50 mm, 30 mm, 12 mm, 5 mm, and 2.5 mm from the top.
As described above, the mesh of the lowermost sieve screen 7A is extremely small, and the steel wire thereof is also about 1 mm, so that the degree of wear is greater than that of the other sieve screens 7, and the frequency of replacement is higher.

In this embodiment, the first to fourth stages from the top have a conventionally known sieve mesh structure. The lowest sieve screen 7A with the smallest mesh is divided into an appropriate number (four in this embodiment) in the longitudinal direction as shown in the figure.
Each unit is individually formed in a cassette manner, so that it can be easily inserted into and removed from the sieve screen main body 1.

FIG. 2 shows a perspective view of a cassette-type sieve screen 7A disposed at the lowest stage.

The frame structure constituting the sieve screen 7A is generally box-shaped as a whole, and inverted L-shaped guided members 9 are formed protruding from both ends of the upper part of the front and rear frame bodies 8 facing each other from left to right. Then, the net 10 is attached to the front and rear frames 8
It is stretched on an upwardly convex curved surface in between. The net 10 is attached in accordance with the conventionally known method described above.

A rim member 11 is provided on the front side of the frame 8 on all four sides, and a front wall 12 surrounded by the rim member 11 has a latching member ( Three locks 13 are arranged in parallel at regular intervals in the horizontal direction. A handle 14 is also provided as needed to make it easier to pull out the sieve screen 7A by hand.

On the other hand, on the sieve main body 1 side, in the frame structure at the lower end connected to the side plate 15, a U-shaped guide member 16 that engages with the guided member 9 of the above-mentioned cassette-type sieve screen 7A is installed in the depth direction of the main body ( Two U-shaped guide members 16, 16 are integrally formed between adjacent members to form a substantially channel-shaped cross section. And the lower end plate 1
7 has three locking plates 18 that engage with the locking lock 13 and are arranged in parallel at regular intervals in the lateral direction.

As is clear from FIG. 2, the combination of the U-shaped guide member 16 and the inverted L-shaped guided member 9 facilitates the continuous arrangement (in the lateral direction) of the plurality of cassette-type sieve screens 7A. Furthermore, when the sieve screen 7A is installed, the top, bottom, left and right sides are restrained, so it works to stably hold against vibrations.
The U-shaped guide member 16 also serves as a reinforcing member for the edge or middle portion of the sieve main body 1.

Now, when the lower cassette-type sieve screen 7A is worn out and needs to be replaced, first insert the locking lock 13 into the locking plate 18.
After removing the sieve screen 7A by grasping the handle 14 and pulling out the sieve screen 7A in the direction opposite to the arrow in the figure, after replacing the screen 10 with a new one, pull the cassette-type sieve screen 7A again into the sieve machine main body 1 in the direction of the arrow. Insert it inside and set it. During the pulling out and insertion operations performed for the above exchange, the guided member 9 is attached to the sieve screen 7A.
Since it is designed to slide while being guided by the guide member 16 on the side, it is easy to take out and insert it, and moreover, the lowermost sieve screen 7A, which has the highest degree of wear and is replaced most often, can be removed from the upper sieve screen 7. It can be replaced without any hassle. In addition, in FIG. 2, the left cassette-type sieve screen 7A is shown inserted into the main body 1.

This cassette-type sieve screen 7A may be conveniently divided into appropriate sizes in the longitudinal direction of the sieve machine body 1 and arranged in parallel, considering ease of handling.

[Effect of idea]

As explained above, according to the present invention, the lower sieve screen, which is the most prone to wear and is replaced most often, is formed into a cassette structure. It is possible to take out and replace the worn sieve screen efficiently with less effort at any time, and if it is divided into cassettes of appropriate size, handling becomes easier and the replacement work can be done even more easily and efficiently. I can do it.

In particular, in the case of the present invention, since the guided member of the sieve screen can be inserted and removed while being guided along the guide member on the main body side, the removal and insertion work can be performed quickly and smoothly. Furthermore, since it is a combination of a U-shaped guide member and an inverted L-shaped guided member, it is easy to consecutively arrange a plurality of cassette-type sieve screens, and when installing the sieve screens, the cassette-type sieve screens are It can be held stably against vibration. Further, the U-shaped guide member can also serve as a reinforcing member for the edge or middle portion of the sieve main body.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams of an embodiment of the present invention, in which Figure 1 is a schematic side view of the entire vibrating sieve, and Figure 2 is a perspective view of the lower cassette-type sieve screen. .
Figure 3a is a schematic side view of a conventional vibrating sieve, Figure 3b
FIG. 1 is a diagram showing the installation structure of a conventional sieve screen. 1... Sieve machine main body, 7... Sieve screen, 7A... (cassette type) sieve screen, 9... Guided member, 10...
Net, 13...lock, 14...handle, 16...guide member.

Claims (1)

[Scope of utility model registration request] In a vibrating sieve with multiple tiers of sieve screens arranged inside the sieve machine body, the sieve screen in the lower tier is divided into an appropriate number of cassettes in the longitudinal direction, and an inverted L shape is placed at the upper four corners of the frame of each of these cassette-type sieve screens. A U-shaped guide member is provided in the lower part of the sieve main body to correspond to the guided members and extends in the depth direction. A vibrating sieve, characterized in that the cassette-type sieve screen is configured to be freely inserted into and removed from a sieving machine main body by slidingly guiding a guide member.