JPS6313822Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a sieve that separates granular materials and powdery materials according to the diameter of the particles.

This type of sieve was developed by the applicant in 1983.
There is one disclosed in Publication No. 47773.

As shown in FIG. 1, this sieve 1' consists of a cylindrical frame 2' with a flange 5' facing outward on one end periphery and a wire mesh 6' fixed to the flange 5', and a cylindrical frame 2' with a flange 5' facing outward on the upper and lower peripheries. In a structure consisting of an underframe 3' having flanges 7' and 8' formed in The concave portion 9' provided in the fixed ring 4' is fitted into the convex portion formed by overlapping the collar portion 7' or 8' of the underframe 3' and the concave portion 9' of the fixed ring 4', and is tightened with a locking tool to complete the above structure. It was meant to unify the elements. This sieve 1' has a cylindrical frame 2' with a wire mesh 6' at the bottom and an underframe 3' which are removable via a fixed ring 4'. Although this was a useful product that made it possible to completely perform the process, there was still room for improvement in terms of the number of components and the simplification of the manufacturing process.

This invention was made to improve the above-mentioned sieve 1', and while it has the advantage of being able to be completely cleaned, it has fewer components and is easy to handle.
In addition, the purpose is to provide a sieve that can reduce manufacturing costs by simplifying the manufacturing process, and its technical means include an underframe that also serves as a fixed ring, and a lower flange of the cylindrical frame. A wire mesh is fixed to the lower surface of the cylindrical frame facing inward, and a protrusion that fits into a recess in the underframe that also serves as a fixed ring is formed with an enlarged diameter above the lower flange of the cylindrical frame.

Examples of this invention will be described below based on the drawings.

Figures 2 to 4 show the sieve 1 of this invention, where 2 is a cylindrical frame and 3 is an underframe. The cylindrical frame 2 has an outward facing flange 4 formed at its upper end periphery, and an inward facing flange 5 formed at its lower end periphery. A wire mesh 6 is fixed to the lower surface of the lower flange 5 by soldering, welding, or the like. The upper flange 4 is provided as a handle, and may be omitted. Above the lower flange 5,
A protrusion 7 is provided which is enlarged in diameter and protrudes outward.

The underframe 3 has an elastic circumferential shape in which an outward-facing flange 8 is formed on the lower peripheral edge, and a recess 9 that fits into the protrusion 7 of the cylindrical frame 2 is formed along the circumferential direction. A locking tool 1 that extends and contracts a locking piece 12 with a locking protrusion 10 attached to one end cut in the axial direction and a spring 11 attached to the other end by a stopper 13.
It is equipped with 4. Note that 15 is a ring made of an elastic material such as rubber, and a groove cut in a radial direction from the inner peripheral surface is inserted into the flange 8 of the underframe 3.
Insert and secure. This ring 15 is provided to make the sieve 1 more comfortable to hold in the hand of an operator.

When using the sieve 1 of this invention having the above configuration, first expand the underframe 3 and fit the recess 9 of the underframe 3 and the protrusion 7 of the cylindrical frame 2, and then adjust the diameter of the underframe 2. The fitting between the recess 9 and the protrusion 7 is further advanced while narrowing. After the locking piece 12 is engaged with the locking protrusion 10, the stopper 13 is tightened against the bias of the spring 11. Therefore, the underframe 3 has a spring 1
The cylindrical frame 2 and the underframe 3 are compressed by the biasing force of the cylindrical frame 2 and the underframe 3 at the same time that both cut ends coincide with each other. After using the sieve 1, loosen the stopper 13 to disengage the locking piece 12 and the locking protrusion 10, release the matching of the cut portion, and connect the recess 9 of the underframe 3 and the cylindrical frame 2.
After removing the underframe 3 from the cylindrical frame 2 while unfitting it with the protrusion 7, both may be thoroughly cleaned.

It should be noted that the locking protrusion 10 of the underframe 3 and the locking tool 14 are not limited to such a pair, and it goes without saying that other known locking means may be used.

As is clear from the above description, the sieve 1 of this invention has one less component compared to the conventional sieve 1', so the labor for the operator is reduced accordingly, and it is also easier for the manufacturer to manufacture. The process can be simplified. Furthermore, in the conventional sieve 1', the wire mesh 6' was fixed to the flange 5' that was formed outwardly on the periphery of one end of the cylindrical frame 2', but in the sieve 1 of this invention, the cylindrical frame Since it is necessary to bring the outer circumferential surface of the frame 2 into close contact with the inner circumferential surface of the underframe 3, the flange 5 at the lower end periphery of the cylindrical frame 2 is formed inward, and the wire mesh 6 is fixed to the flange 5. This further simplifies the work process for the following reasons. That is,
As shown in FIG. 5, in a conventional sieve 1' in which a wire mesh 6' is fixed to an outward facing flange 5',
When fixing the wire mesh 6' to the outward facing flange 5' by welding or the like, force is applied to the base of the flange 5', so the lower opening of the cylindrical frame 2' expands outward in a distorted manner.
Therefore, it becomes difficult to fix the wire mesh 6' in a stretched state, and it also becomes difficult to bring the lower surface of the flange 5' into close contact with the upper surface of the flange 7' of the underframe 3'. Since a problem arises in that it is not possible to form a convex portion that fits into the concave portion 9', the collar portion 5' is usually first inclined outward.
After attaching the wire mesh 6' by spot welding,
After attaching a separate fixing frame or the like to the cylindrical frame 2' and adjusting it so that the opening does not expand, the wire mesh 6' is adjusted to be stretched while the flange 5' is held upright, and then soldered or welded. Since the wire mesh 6' was completely fixed, the process of tensioning the wire mesh 6' required considerable skill and effort. However, when the wire mesh 6 is fixed to the inward facing flange 5 as in the sieve 1 of this invention, as shown in FIG. Since the influence of the force exerted on the opening when the wire mesh 6 is fixed is considerably reduced, the wire mesh 6 is completely stretched by welding or the like with the flange 5 slightly inclined outward. Since it can be fixed without any problem,
In addition to being able to omit spot welding and the accompanying pickling process, no extra effort or skill is required in the tensioning process, so the wire mesh 6 can be fixed very efficiently, resulting in improved productivity. .

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional sieve, Fig. 2 is an exploded explanatory view of the assembly of this embodiment, Fig. 3 is a sectional view when the same is assembled, Fig. 4 is a sectional view when the same is separated, and Fig. 5 is a sectional view of the conventional sieve. Cross-sectional explanatory diagram when fixing the wire mesh to the outward facing flange, No. 6
The figure is an explanatory cross-sectional view when fixing the wire mesh to the inward facing collar. 1... Sieve, 2... Cylindrical frame, 3... Underframe, 4,
5, 8...Brim portion, 6...Wire mesh, 7...Protrusion, 9
... recess, 14 ... locking tool.

Claims (1)

[Scope of utility model registration request] A wire mesh is fixed to a flange formed inward on the periphery of one end, and a cylindrical frame is provided with a protrusion by expanding the diameter above the flange, a recess that fits into the protrusion, and a cylindrical frame is provided on the periphery of the lower end. A sieve consisting of a removable frame forming an outward facing collar and having a locking device attached to the cut end thereof.