JPH04326906A - Filter member - Google Patents

Abstract

PURPOSE:To enhance the arranging density of filter papers to improve filtering capacity by providing through-holes to two opposed wide surfaces of a reinforcing cylinder whose cross section is formed into a rectangular shape and providing filter materials folded in a bellows shape to two opposed wide surfaces. CONSTITUTION:A reinforcing cylinder 1 is formed of opposed surfaces 5,6 and opposed surfaces 7,8 and the cross section thereof is formed into a rectangular shape. It is pref. that the width (a) of each of the surfaces 5,6 for reducing the region unrelated to the arrangement of filter materials occupied by the reinforcing cylinder 1 is made smaller if there is no trouble in the filtering of a liquid to be filtered. A large number of through-holes 9 for passing the liquid to be filtered are provided to the surfaces 7,8 of the reinforcing cylinder 1 but, when the reinforcing cylinder 1 is deformed by the pressure of the liquid to be filtered, said cylinder is reinforced by reinforcing members 10. Filter papers 12 folded in a bellows shape are respectively provided to the surfaces 7,8 of the reinforcing cylinder 1 and both ends of the filter papers 2 are bonded to the surfaces 5,6 of the reinforcing cylinder 1 by an adhesive to prevent the leakage of the liquid to be filtered. Since the wasteful space occupied by the reinforcing cylinder can be reduced, the filtering area can be made large.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to filter members used for gas and liquid filtration.

0002

BACKGROUND OF THE INVENTION Filter members are widely used for, for example, filtration of intake air of automobile engines, filtration of lubricating oil, filtration of fuel oil, filtration of electrical discharge machining fluid, and the like.

[0003] As filter members used for these filtration processes, those in which filter papers folded into bellows are arranged in a chrysanthemum pattern around the entire periphery of a cylindrical reinforcing tube with holes are often used to increase the arrangement density of the filter papers. There is.

[0004] In these conventional filter members,
Since the filter paper is provided in a chrysanthemum shape, the pitch between the folded portions on the outer circumference of the filter paper is inevitably larger than the pitch between the folded portions on the inner circumference that contacts the reinforcing tube. This means that even if the pitch between the folds of the filter paper in contact with the reinforcing cylinder is set to the minimum pitch that allows filtration, the pitch between the folds on the outer periphery of the filter paper must be made larger than necessary. are doing. Therefore, if the filter papers are arranged in a chrysanthemum pattern, there will be wasted space unrelated to filtration, and the filtration capacity cannot be increased. Additionally, if the filter paper is folded many times in an attempt to increase the filtration surface area, the diameter of the reinforcing tube must be increased in order to obtain the minimum pitch possible for filtration, which narrows the area in which the filter paper can be placed. There was a problem with this.

[0005] Japanese Utility Model Publication No. 2-9851 proposes that by specifying the filter paper arrangement pattern, the arrangement density of the filter papers can be made uniform, wasteful space can be eliminated, and the filtration area can be increased. Due to the arrangement pattern, some filter papers cannot be supported by the reinforcing cylinder and cannot obtain sufficient strength. Further, there was a problem that the arrangement pattern of the filter paper was complicated and could not be manufactured at low cost.

Japanese Utility Model Publication No. 2-20010 discloses that a reinforcing tube is formed so as to have a rectangular cross section, and a filter paper folded into a bellows shape is formed so that each side of the reinforcing tube corresponds to the folding width of the filter paper. In an area extending in the same direction on either the left or right by the length of
It is proposed that by forming the filter paper into a rectangular shape as a whole, the inner and outer pitches of the filter paper will be the same, thereby eliminating wasted space and improving the filtration capacity without increasing the size of the device. However, there was a problem in that the filter paper placed in the area where each side of the reinforcing cylinder was extended was not supported by the reinforcing cylinder, and sufficient strength could not be obtained.

Furthermore, Japanese Patent Publication No. 62-35805 discloses that a plurality of concentric chrysanthemum-shaped elements are used, and the difference in pitch between the inner and outer circumferences is reduced by reducing the difference in the inner and outer diameters of each chrysanthemum-shaped element. Although it has been proposed to reduce wasted space, there is a problem that the structure becomes complicated and cannot be manufactured at low cost.

[0008]

OBJECTS OF THE INVENTION Therefore, the first object of the present invention is to make the pitch of the part of the filter medium in contact with the reinforcing tube the same as the pitch of the outer peripheral part, to eliminate wasted space, to increase the arrangement density of the filter paper, and to increase the size of the device. It is an object of the present invention to provide a filter member that can improve filtration ability without being accompanied by.

A second object is to provide a filter member that has sufficient strength and can be manufactured at low cost.

0010

SUMMARY OF THE INVENTION The above object is achieved by the following filter member.

(1) In a filter member consisting of a reinforcing tube and a filter medium bent into a bellows shape, the cross section of the reinforcing tube is formed into a rectangular shape, and through holes are provided on two wide opposing sides of the reinforcing tube. , and the filter media is bent into a bellows shape.
A filter member provided on each of the two opposing wide faces.

(2) The above-mentioned (
1) The filter member according to item 1).

(3) The above-mentioned (
1) The filter member according to item 1).

(4) The above (1) characterized in that the outer periphery of the filter medium bent into a bellows shape is reinforced with a reinforcing member.
), (2) and (3).

The present invention will be explained in more detail below.

In the present invention, various types of filter media can be used depending on the purpose of use, such as the size of the particles to be removed and the required removal efficiency. As the filter medium, filter paper, cloth, non-woven fabric, etc. can be used, and
As the material for the filter medium, any of organic fibers such as natural cellulose fibers, regenerated cellulose fibers, and synthetic fibers, inorganic fibers such as glass fibers, and metal fibers can be used. The filter medium may be a single layer or may be a laminate of multiple layers.

The reinforcing cylinder has two opposing wide surfaces (a) and two opposing narrow surfaces (b), and has a rectangular cross section. The short side of the rectangular cross section [face (
b) Width] is preferably as small as possible within a range that allows the filtrate etc. to pass through without any hindrance in order to reduce the area occupied by the reinforcing tube that is unrelated to the arrangement of the filter medium. A through hole is provided on the surface (a) to allow the filtrate to pass through. It is preferable that one or more reinforcing members be provided on the reinforcing tube to prevent its deformation.

The filter medium is arranged in a bellows-like manner on the surface (a). It is preferable that the outer periphery of the filter medium bent into a bellows shape is reinforced with one or more reinforcing members so that the filter medium is not deformed by the pressure of the filtrate. The reinforcing member may be thread-like or band-like. It is also preferable to surround the outer periphery with a punching plate for reinforcement.

[0019]

[Embodiment] Next, an embodiment of the present invention will be explained based on the drawings.

FIG. 1 is a sectional view taken along the line A-A in FIG. 2, FIG. 2 is a front view of the filter member of the present invention, FIG. 3 is a perspective view of the filter member, and FIG. 4 is a perspective view of the reinforcing cylinder. 5 is a diagram illustrating a reinforcing member of the reinforcing tube.

In the figure, 1 is a reinforcing tube, 2 is a filter paper, and 3 and 4 are end plates.

The reinforcing tube 1 is formed of opposing surfaces 5 and 6 and opposing surfaces 7 and 8, and has a rectangular cross section. In order to reduce the area occupied by the reinforcing cylinder that is not related to the arrangement of the filter medium, the width a of the surfaces 5 and 6 is preferably small as long as it does not impede passage of the filtrate. Further, the width b of the surfaces 7 and 8 is selected so that the filter paper can be arranged to provide the necessary filtration area. Although the ratio of width a to width b cannot be determined uniformly depending on the size of the filter member and the required filtration capacity,
It is necessary that the width b is 4 or more with respect to 1.

A large number of holes 9 are provided in the surfaces 7 and 8 of the reinforcing cylinder 1 so that the filtrate can pass therethrough. In addition, when the reinforcing cylinder 1 is deformed by the pressure of the filtrate, the deformation of the reinforcing cylinder 1 can be prevented by reinforcing it with one or more reinforcing members 10. 11 is reinforcing member 1
This is a through hole provided at 0.

In FIG. 4, the reinforcing member 10 is provided so as to cross the reinforcing tube 1, but it may also be provided so as to traverse the reinforcing tube 1. In this case, the through hole 11 may or may not be provided.

[0025] On the surfaces 7 and 8 of the reinforcing cylinder 1, filter papers 2 each bent into a bellows shape are provided. Both ends of the filter paper 2 are joined 12 to surfaces 5 and 6 of the reinforcing cylinder 1 with adhesive or the like.
13 to prevent the filtrate from leaking.

[0026] In order to increase the pressure resistance of the filter member, it is preferable to bond the filter paper 2 and the reinforcing cylinder 1 together using an adhesive or the like at the portion where the filter paper 2 contacts the reinforcing cylinder 1.

Reference numeral 14 indicates a reinforcing member for reinforcing the outer periphery of the filter paper 2 folded into a bellows shape. The reinforcing member 14 is bonded to the filter paper 2 folded into a bellows shape with an adhesive or the like.

The end plates 3 and 4 are bonded to the top and bottom of the filter member formed by the reinforcing cylinder 1 and the filter paper 2 with an adhesive or the like, so that the filtrate does not leak. 15 is a filtrate inlet/outlet provided in the end plate 3.

FIG. 6 shows a filter member of the present invention in which the outer periphery of a filter medium bent into a bellows shape is reinforced with a punching plate 16. In the figure, 2 is a filter paper, 3 and 4 are end plates, and 15 is a filtrate inlet/outlet provided in the end plate 3.

FIG. 7 shows a filter member of the present invention in which the envelope of the outer periphery of the filter medium is bent into a bellows shape and has a rectangular shape. In the figure, 1 indicates a reinforcing cylinder and 2 indicates a filter paper.

[0031]

Effects of the Invention In the filter member of the present invention, since the filter medium bent into a bellows shape is provided on two opposing wide faces of the reinforcing cylinder having a rectangular cross section, the inner periphery of the filter medium is It is possible to equalize the pitch between the ridge lines of the inner and outer circumferential parts, so that there is no wasted space in arranging the filter material.In addition, the reinforcing tube is made into a rectangular shape with a rectangular cross section, and the filter material is placed opposite the reinforcing tube. Since it is provided on two wide sides, the wasted space occupied by the reinforcing cylinder can be reduced, and the filtration area can be increased. In addition, since the filter medium is provided on two wide opposing sides of the reinforcing cylinder, the filter medium is reinforced by the reinforcing cylinder, which prevents deformation due to the pressure of filtrate, etc. Furthermore, the outer periphery of the filter medium is reinforced with a reinforcing member. By doing so, deformation can be further reduced.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a cross section taken along line A-A in FIG.

FIG. 2 is a front view of the filter member of the present invention.

FIG. 3 is a perspective view of a filter member of the present invention.

FIG. 4 is a perspective view of a reinforcing tube of the filter member of the present invention.

FIG. 5 is a diagram illustrating a reinforcing member of the reinforcing tube.

FIG. 6 is a diagram showing a filter member of the present invention in which the outer periphery of the filter medium is reinforced with a punching plate.

FIG. 7 is a sectional view of a filter member of the present invention in a different embodiment from that shown in FIG. 1;

Claims (4)

[Claims] 1. A filter member comprising a reinforcing tube and a filter medium bent into a bellows shape, wherein the reinforcing tube has a rectangular cross section, and through holes are provided on two opposing wide sides of the reinforcing tube, A filter member characterized in that a filter medium bent into a bellows shape is provided on each of the two opposing wide faces. [Claim 2] Claim 1, wherein the envelope of the outer periphery of the filter medium folded into a bellows shape is circular.
The filter member described in . [Claim 3] Claim 1, wherein the envelope of the outer periphery of the filter medium folded into a bellows shape is rectangular.
The filter member described in . 4. The filter member according to claim 1, wherein the outer periphery of the filter medium bent into a bellows shape is reinforced with a reinforcing member.