JPH0796090B2 - Filter element reinforcement - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter element reinforcement for reinforcing a filter element for filtering a fluid.

[0002]

2. Description of the Related Art The inventors of the present invention have previously proposed a filter having a reinforcing member in Japanese Patent Application No. 2-70033. As shown in FIG. 6, the reinforcing body in the already proposed filter has a large number of radial openings 2, ... In a cylindrical reinforcing body 1, and a large number of supporting filter elements 6 on its outer peripheral surface. The narrow ridges 4, ... Are crossed and formed. This filter has the advantages that the filtration rate and strength per unit volume are increased by the reinforcing member 1 and that the life of the filter element is long,
There is a lack of consideration regarding the molding of the reinforcing body 1.

That is, when the reinforcing member 1 is to be molded by two molds divided by the virtual plane X--X, the opening 2,
The circumferential side walls 2a, ... Of 2 impede, and the mold cannot be pulled out from the molded reinforcement body 1 in the arrow direction. For this reason, the reinforcing body 1 needs to be molded by a mold divided into three or more. However, when the number of divided molds increases, not only the manufacturing becomes complicated, but also the operation of the molding machine becomes complicated, so that the reinforcing body becomes expensive.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive filter element reinforcing member.

[0005]

In order to solve the above-mentioned problems, the present invention relates to a reinforcing member for a filter element having a large number of radial openings and having a substantially cylindrical shape. For each of a pair of semi-cylindrical parts constituting the reinforcement, parallel to the direction orthogonal to the diameter of the semi-cylindrical part, or the entire surface is visible from the outside of the direction, the reinforcement is a filter It is characterized in that the supporting surface of the element is provided with a large number of narrow ridges which are inclined and intersect with each other.

In order to solve the same problem, it is preferable that one of the protrusions is discontinuous on both sides in the circumferential direction of the pair of semi-cylindrical portions.

[0007]

In the circumferential side wall of the opening, for each pair of semi-cylindrical parts constituting the reinforcing body, the entire surface is visible in parallel to the direction orthogonal to the diameter of the semi-cylindrical parts or from the outside in the above direction. By doing so, the mold for molding the reinforcing body can be extracted in the direction orthogonal to the diameter of each semi-cylindrical portion, so that the reinforcing body can be molded by two molds. Therefore, the mold can be easily manufactured, and the operation of the molding machine is simplified, so that the filter element reinforcement body can be made inexpensive.

Further, since one of the protrusions is discontinuous on both sides in the circumferential direction of the pair of semi-cylindrical portions, it becomes easier to pull out the mold from the molded reinforcing body.

[0009]

1 to 5 show an embodiment of the present invention in which a reinforcing member 11 of the filter element has a substantially cylindrical shape,
A large number of radial openings 12, ..., And narrow ridges 14, ... And 15, .. It is integrally molded with synthetic resin such as.

The reinforcing member 11 has two side walls in the circumferential direction of the openings 12, ... Opened in the desired semi-cylindrical portions 11a and 11b constituting the reinforcing member in two virtual planes Y--Y. A molding die (not shown) of the divided reinforcing body is configured so as to be able to be pulled out in a direction orthogonal to the semi-imaginary plane. Specifically, the openings 12 in the middle of the semi-cylindrical parts 11a and 11b in the circumferential direction are the side walls 12a, which are parallel to the direction substantially orthogonal to the virtual plane, and the entire surface from the outside in this direction. .. and the like (see FIGS. 2 and 3), and the upper and lower walls of each opening 12 are tapered surfaces that expand slightly horizontally or radially outward. However,
All of the side walls in the circumferential direction may be formed as 12b.
Further, the narrow ridges 14, ... And 15, .. .. intersect at an angle substantially equal to the circumferential direction of the reinforcing body 11, and the ridges 15, .. It is discontinuous on both sides in the circumferential direction of 11a and 11b (see FIG. 4).

On the other hand, the filter element 20 is formed by a sintered body obtained by sintering synthetic resin powder, a thread winding obtained by winding a large number of threads, or a non-woven fabric or a sheet-like sponge wound in a tubular shape, and a supporting surface. It is attached to each ridge on 13.

In the above-mentioned embodiment, since the molding die of the reinforcing body 11 which is divided into two along the virtual plane Y--Y can be extracted from the molded reinforcing body 11 in the direction of the arrow in FIG. Since the mold can be made inexpensive and the operation of the molding machine is simplified, the reinforcing body 11 can be made inexpensive. In this case, the ridges 14, ... Or 15, ... Near the both ends of the semi-cylindrical portions 11a, 11b in the circumferential direction do not hinder the extraction of the mold because the width is narrow, but the ridges 15 ,. Is discontinuous on both sides in the circumferential direction of the semi-cylindrical portion, so that the die can be more easily removed. Also,
By slopingly intersecting the ridges 14, ... And 15, ..., the area of the recess surrounded by these ridges can be effectively used, and the strength of the reinforcing body 11 itself is increased. be able to.

In the above embodiment, the fluid such as compressed air, in which dust and the like are filtered by the filter element 20, flows out into the reinforcing member 11 through the openings 12, ... Is discharged to the outside of the reinforcing body 11. In this case, even if a large pressure difference acts on the filter element 20, the filter element 20 will not
Since the pressure acting on the filter element 20 in close contact with 1 is only the area of the openings 12, ... (See FIG. 5), the breaking pressure can be increased.

[0014]

Since the reinforcing body of the filter element according to the present invention can be molded by the mold divided into two parts, the mold can be manufactured easily and inexpensively, and the operation of the molding machine can be simplified. The reinforcing body can be inexpensive. Furthermore, because the ridges are inclined and crossed,
The area of the recess in the ridge can be effectively used, and the strength of the reinforcing body itself against a force directed in the axial direction and the central direction can be increased.

Further, since one of the protrusions for supporting the filter element is discontinuous on both sides in the circumferential direction of the semi-cylindrical portion, it is easier to remove the mold from the molded reinforcing body.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

3 is a sectional view taken along line BB of FIG.

FIG. 4 is a development view of a semi-cylindrical portion.

FIG. 5 is an explanatory diagram at the time of filtration.

FIG. 6 is a cross-sectional view of a proposed reinforcement body.

[Explanation of symbols]

 11 Reinforcement body 11a, 11b Semi-cylindrical part 12 Opening 12a, 12b Side wall 13 Supporting surface 14, 15 Projection 20 Filter element

Claims (2)

[Claims] 1. A reinforcing body of a filter element having a large number of radial openings and having a substantially cylindrical shape, wherein a circumferential side wall of the opening is provided for each of a pair of semi-cylindrical portions forming the reinforcing body. , Parallel to the direction orthogonal to the diameter of the semi-cylindrical portion, or the entire surface is visible from the outside of the direction, and the reinforcing body crosses the supporting surface of the filter element with a mutual inclination. A reinforcing body for a filter element, which is provided with a narrow ridge. 2. The reinforcement body for a filter element according to claim 1, wherein one of the protrusions is discontinuous on both sides in the circumferential direction of the pair of semi-cylindrical portions.