JPH0141511Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The sieve meshing device of the present invention is a device for stretching the sieve mesh on the sieve frame without distorting it when the sieve mesh is stretched on the sieve frame. In particular, the present invention relates to a device for setting a sieve screen for a large sieve for sieving ceramic slurry and fine powder.

(Prior Art) As is well known, conventional large sieves include those in which a sieve screen is nailed to a wooden frame, and those in which a sieve screen is dot-soldered to a metal frame. These sieves had to be tensioned by experienced workers to prevent the sieve mesh from loosening, but even then it was not possible to increase the tension of the sieve mesh.

(Problems to be solved by the invention) If the sieve screen is stretched in a distorted manner with respect to the sieve frame, the opening of the sieve changes and the accuracy of sieving decreases.

In addition, if the sieve screen is not fixed uniformly to the sieve frame, but is fixed at multiple points, and the sieve is vibrated with a strong vibration force, the sieve screen will concentrate its bending motion in the vicinity of the points fixed. Metal fatigue may cause the sieve mesh to break faster.

Furthermore, if the sieve screen is fixed to the metal frame with dot solder, it takes time to remove the sieve screen when replacing the sieve screen. It was necessary to scrape off the solder with a grinder to avoid damaging the net.

Also, if the tension of the sieve screen stretched over the sieve frame is small,
When the sieve was vibrated, the sieve screen waved and vibrated, and the portions that hit the nodes of the waves often broke and broke due to metal fatigue.

For this reason, in order to reinforce the sieve screen, a double sieve screen is used, in which a sieve screen with a predetermined mesh size is placed on top, and a reinforcing sieve screen with a mesh size coarser than that of the upper sieve screen is placed below it. It is also common practice to do this, but in such cases, a higher level of skill is required.

A specialized and skilled worker is required to put a sieve screen on the sieve frame, but there are no skilled workers specializing in sieve meshing at the factory that operates the sieve equipment delivered by the equipment manufacturer. It is inefficient to transport the sieve to a manufacturer specializing in sieve equipment to have it replaced every time it becomes damaged, and there are many problems such as the sieve user having to skillfully replace it himself.

In order to solve these problems,
- As shown in Publication No. 153183, on a table having an opening larger than the sieve frame, hold the sieve screen with a temporary frame of a sieve screen holder having an opening of the same size, and fix the temporary frame to the table. After that, the sieve frame placed on the sieve screen is pressed with the pressing tool of the pressing device installed on the table, and while the sieve frame is in the pressed state, the other sieve frame is bolted from below to the upper sieve frame. A device was developed to do this.

However, in such devices, there is an opening that is larger than the sieve frame of the sieve used, so when the sieve screen is unfolded over this opening, there is a risk that the sieve screen will hang from the opening, and the temporary frame cannot be used. There is a problem in that the fixing work is difficult.

Since the temporary frame has a larger external size than the sieve used, there is a problem in that it requires a large floor space for storage when not in use.

Another problem is that when the upper and lower sieve frames are fastened to each other, it is necessary to work under the lower sieve frame.

Furthermore, since the temporary frame is a single piece, it is difficult to correct the sieve screen sandwiched between the temporary frames so that it can be stretched correctly. There is also the problem that the parts that protrude outward from the temporary frame must be adjusted by pulling them using large pliers.

[Means for solving problems]

The sieve meshing device of the present invention was developed to eliminate the above-mentioned problems, and includes an annular sieve inner frame having a V-groove on the sieve mesh contact surface, and the sieve inner frame placed thereon. A plate-like body integrally having a plurality of sieve inner frame mounting stands on the outer periphery, a sieve screen pressing surface covered with rubber, and held movably up and down and having approximately the same shape as the sieve inner frame shape; A sieve screen tensioning stand located below the body and having a through hole through which the elevating shaft of the plate-like body passes; It consists of a plurality of screen holders that sandwich and hold the sieve screen in position, and an elevating device connected to the elevating shaft that raises and lowers the plate-shaped body, and the screen holder spreads the sieve screen evenly on the sieve screen tensioning table. The ends of the sieve screen are clamped and held, and the plate-shaped body is pushed up by the lifting device to tension the sieve screen evenly along the sieve inner frame, and the sieve outer frame is fitted around the outer periphery of the sieve inner frame. This sieve meshing device is characterized in that a sieve mesh is tension-held between a sieve inner frame and a sieve outer frame.

Then, the screen presser is attached to the sieve screen tensioning stand with a hinge,
A device that can be tightened to a sieve screen tensioning table using tightening screws.
It is preferable that the elevating device for elevating and lowering the plate-like body is a jack device, that the elevating device for elevating and lowering the plate-like object is a cylinder device, and that the outer shape of the sieve inner frame is circular.

The height at which the sieve inner frame is pushed up by the plate-shaped body is adjusted according to the predetermined tension of the sieve screen stretched over the sieve frame.
The sieve screen is tensioned uniformly along the sieve inner frame, the sieve outer frame is fitted around the outer periphery of the sieve screen, the sieve screen is clamped under tension between the sieve inner frame and the sieve outer frame, and the sieve screen is fixed to the sieve frame. Loosen it, remove the sieve frame, cut off the excess sieve mesh, and adjust the shape.

The device of the present invention can be used when manufacturing sieve devices, but in particular, the device has a structure that is convenient for use in factories using sieve devices that do not have specialized workers for sieve screen relining.
A rubber plate is pasted on the sieve screen pressing surface of the sieve holder, and multiple mounting holes drilled in the sieve inner frame for connecting the sieve frame with the sieve screen stretched to the sieve device are inserted through the sieve screen. It is preferable to provide a light projector for position confirmation and to install rollers to make the sieve screen table movable.

(Operations and Examples) The functions of the sieve and mesh apparatus of the present invention will be described together with examples and usage of the sieve and screen apparatus.

As shown in FIG.
Preferably, two sieve screens 11 and 12 are spread out evenly on the sieve screen table 1 which has been lowered and stopped. When forming a double sieve mesh layer in this way, the sieve mesh of a predetermined mesh size and the reinforcing sieve mesh are placed in a predetermined order in the sieve meshes 11 and 1.
Expand as 2.

These sieve screens 11 and 12 are sandwiched between a screen presser 4 provided on a sieve screen tensioning stand 1 so as to be openable and closable with a hinge 3,
The screen presser 4 is tightened to the sieve screen tensioning stand 1 with the screw 6 of the tightener 5 of the screen presser 4, and the sieve screens 11 and 12 are held. Bolts 7 are installed at a plurality of locations on the screen presser 4 and are tightened to securely hold the sieve screens 11 and 12.

A sieve inner frame 13 is placed on the plate-like body 2, and a plurality of sieve inner frame mounts 8 preferably having an L-shaped cross section are integrally provided on the outer periphery.

It is important that the shape of the plate-like body 2 is almost the same as the shape of the sieve inner frame.The sieve frame is generally circular, but when the sieve frame is rectangular, The body should also be rectangular.

As shown in FIGS. 2 and 3, the sieve screen tensioning stand 1
When the handle 10 of a lifting device such as a jacking device 9 is turned to push up the plate-shaped body 2 through a lifting shaft 16 passing through a through hole 15 provided in the center of the screen, the plate-shaped body 2 and the sieve inner frame are lifted up. The sieve inner frame 13 on the stand 8 is also raised, and the screen presser 4 is provided on the screen holder 1 in close proximity to the shape of the plate-shaped body 2, and the sieve screens 11 and 12 are held at their ends by the screen presser 4. Since the sieve screens 11 and 12 are firmly held, they are tensioned by the screen presser 4, the plate-shaped body 2, and the sieve inner frame 13, and the sieve screens are uniformly tensioned along the sieve inner frame. The tension force at this time is adjusted by the rising height of the plate-like body 2. Plate body 2
A cylinder device or the like can also be used as the lifting device.

When the sieve screen has a uniform tensioned shape along the sieve inner frame 13, the sieve outer frame 14 is fitted around the outer periphery of the sieve screen 1.
1 and 12 are held between the inner sieve frame 13 and the outer sieve frame 14,
Then, fix it on the sieve frame. In addition, the sieve screens 11 and 12
In order to attach the completed sieve frame to the sieve device, multiple bolt holes are provided in the sieve inner frame in a concentric arrangement. put.

At this time, if a double sieve screen is used, the punch holes are difficult to see from above the sieve screen, so the bolt hole positions can be easily confirmed by projecting light from below with a projector.

Next, the clamp 5 of the screen presser 4 is loosened, the sieve frame with the sieve screen stretched thereon is removed, and the protruding extra sieve screen is cut off.

Such sieve meshing can be performed on a new sieve frame as well as when the sieve mesh is being replaced.

In addition, as shown in FIG. 3, a V-shaped groove is provided on the surface of the sieve inner frame 13 that comes into contact with the sieve mesh.
It is preferable to provide a protrusion that fits into the V-groove on the mounting surface of the sieve device in order to prevent the sieve screen from loosening.

When sieve meshing is carried out using such a sieve meshing device of the present invention, the sieve mesh can be spread out on the plate-like body, so that the sieve mesh can be spread out almost horizontally.
It does not hang down from the opening.

Further, a temporary frame larger than the sieve frame is not required. Work can then always be carried out using only the top surface of the device.

Moreover, since the screen presser is divided, it is easy to correct only the portions where the sieve screen is spread unevenly.

In addition, compared to the sieve mesh made using the conventional sieve meshing method, when the sieve meshing device of the present invention is used, the sieve mesh relining time can be reduced by more than 60%, and the sieve rescreened using this device is Since the tension of the sieve screen is sufficient, the service life is 1.4 times longer than the conventional usage time.

(Effect of the invention) Although the sieve meshing device of the present invention has a simple mechanism, it is difficult for an expert to properly stretch the sieve mesh on the sieve frame, which is used for heavy sieving work that requires a large amount of sieving per unit time. Even if it is not, it can be easily carried out, and since the tension of the sieve screen is sufficient, the sieve has a long service life.

In addition, the opening of the sieve will not be disturbed by the sieve mesh, so if you use the sieve mesh set by this sieve mesh device, the product sieved by this sieve mesh will be guaranteed to have accurate particle size. Ru.

The sieve meshing device of the present invention has the above-mentioned effects, and the present invention greatly contributes to the development of industry.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a sieve meshing device according to an embodiment of the present invention, Fig. 2 is a cross-sectional view of the embodiment of Fig. 1, and Fig. 3 is a partial explanatory view of a state in which the plate-shaped body is pushed up. . DESCRIPTION OF SYMBOLS 1... Sieve netting stand, 2... Plate-shaped body, 3... Hinge, 4... Screen presser, 5... Fastener, 6... Screw,
7... Bolt, 8... Sieve inner frame stand, 9... Jacketing device, 10... Handle, 11... Sieve screen A,
12...Sieve screen B, 13...Sieve inner frame, 14...Sieve outer frame, 15...Through hole, 16...Elevating shaft.

Claims (1)

[Scope of utility model registration request] An annular sieve inner frame having a V-groove on the sieve mesh contact surface and a plurality of sieve inner frame holders on which the sieve inner frames are placed are integrally formed on the outer periphery, and the sieve screen pressing surface is covered with rubber. a plate-shaped body having substantially the same shape as the sieve inner frame shape and held movably up and down; a sieve screen tensioning stand located below the plate-shaped body and having a through hole through which an elevating shaft of the plate-shaped body passes; a plurality of screen pressers for holding and holding the sieve screen at positions larger than the outer size of the sieve inner frame and close to the outer size of the sieve inner frame on the sieve screen tensioning stand; It consists of an elevating device connected to an elevating shaft, and the screen presser clamps and holds the ends of the sieve screen evenly spread on the sieve screen tensioning table, and the elevating device pushes up the plate-shaped body to sieve. A sieve screen characterized in that the screen is tensioned uniformly along the sieve inner frame, and the sieve outer frame is fitted around the outer periphery of the sieve inner frame, so that the sieve screen is held under tension between the sieve inner frame and the sieve outer frame. Tensioning device.