JP2000317237A - Filter element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter element capable of preventing the deformation of a filter body resulting from the bending of an outer frame and capable of letting effectively work the whole filter material by making a ridgeline of the filter body so as not to bend while easy in production. SOLUTION: The element is formed by making the filter body 2 by bending a belt-shaped filter material 1 in bellows shape, and embedding four outer side parts 4 of an upper part 3 of the filter body 2 in a synthetic resin made outer frame 6 having a flange part 5 for a packing projecting to the outer direction from the center of thickness, and embedding both ends 9 and 10 along a bent ridgeline 8 of the filter body 2 of the lower part 7 of the filter body 2 in synthetic resin made holding plates 11 and 12. Notched recessed parts 18 and 19 whose upper part 14 has a wide port part 16 at the upper end and whose lower part 15 has a wide port part 17 are formed so as to face each other at the upper and lower parts 14 and 15 of the flange part 5 at the piece of an outer frame part 13 parallel to the bent ridgeline 8 of the filter body 2 among four pieces constituting the outer frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a square filter element used for, for example, an air cleaner for an automobile.

[0002]

2. Description of the Related Art As a filter element used in a conventional automobile air cleaner, for example, as shown in FIG. 3, a filter medium 30 is bent into a bellows shape to form a filter body 31. It is embedded in an outer frame 33 made of a synthetic resin having a packing flange 32 projecting outward from the center in the thickness direction. There is a square element in which the right and left outer sides (in the direction perpendicular to each other) are embedded in a holding plate 35 made of synthetic resin. Reference numeral 36 in the figure denotes a reinforcing plate formed on the outer frame 33 at a substantially central portion of the filtering body 31 in a direction along the bent ridgeline 34 and orthogonal to the ridgeline 34.

However, there are actually the following technical problems.

[0004]

That is, in the above-described conventional filter element, the outer frame 33 having the packing flange 32 projecting outward from the center in the thickness direction is formed when the synthetic resin is cooled during the manufacturing process. The four corners are curved so as to lift upward. As a result, there is a problem that the filter body 31 is deformed and the ridgeline is bent, so that the filter body 31 becomes uneven and the entire filter body 31 does not work effectively.

On the other hand, Japanese Unexamined Utility Model Publication No. Sho 62-170121 discloses an invention for adjusting the interval between the ridge lines of the filter medium. However, in the invention described in this publication, the ridge line of the filter medium is disclosed. The irregularity of the ridge line due to the deformation of the filter due to the curvature of the outer frame along the direction orthogonal to the direction can be suppressed, but the deformation of the filter due to the curvature of the outer frame along the direction parallel to the ridge of the filter media The problem that the entire filter does not work effectively has not been solved yet.

The present invention has been made to solve the above problems, and it is easy to manufacture, while preventing the deformation of the filter due to the bending of the outer frame and preventing the ridge of the filter from bending. It is an object of the present invention to provide a filter element capable of effectively operating the entire filter medium.

[0007]

In order to achieve the above-mentioned object, the present invention provides a filter body which is formed by bending a band-shaped filter material into a bellows shape, and the upper sides of the filter body are arranged outward from the center in the thickness direction. The filter body was formed by embedding it in an outer frame made of synthetic resin having a flange portion for packing protruding from the filter body, and embedding the lower portion of the filter body at both ends along the bent ridge line of the filter body in a holding plate made of synthetic resin. A filter element, wherein the filter element is characterized in that one or a plurality of notched recesses are formed in a piece parallel to a ridge line of the filter medium among four pieces constituting the outer frame. It is.

[0008] According to the above configuration, the notch recess absorbs the curvature of the outer frame along the direction parallel to the ridge line of the filter medium, thereby preventing the filter body from being deformed while the notch recess is easily manufactured. As a result, since the ridgeline of the filter medium does not bend, the entire filter medium can work effectively.

In the present invention, the notch recess may have a fan-like shape that expands as the distance from the packing collar increases. In this case, the die can be easily removed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view in which a part of a filter element according to one embodiment of the present invention is cut away, and FIG. 2 is a perspective view in which a part of a filter element according to another embodiment is cut out.

In the embodiment shown in FIG. 1, a filter medium 2 is formed by bending a band-shaped filter medium 1 into a bellows shape, and a four-side outer portion 4 of an upper portion 3 of the filter body 2 is moved outward from the center in the thickness direction. The filter body 2 is embedded in an outer frame 6 made of a synthetic resin having a packing flange 5 protruding toward the lower side, and the lower part 7 of the filter body 2 is cut at both ends along a bent ridge line 8 of the filter body 2 (in a direction orthogonal to the ridge line 8) (Right and left outer sides) 9 and 10 are embedded in holding plates 11 and 12 made of synthetic resin, similarly to the conventional filter element. It is to be noted that 22 in the figure is a reinforcing plate formed on the outer frame 6 at a substantially central portion in the direction along the bent ridge line 8 of the filter body 2 so as to be orthogonal to the ridge line 8 as in the conventional case. is there.

The features of the present invention are as follows:
Of the four pieces constituting the outer frame, the upper and lower portions 14 of the collar portion 5 are attached to pieces of the outer frame portion 13 (pieces located at the lower right and upper left in FIG. 1) parallel to the bent ridge line 8 of the filter body 2. , 15, the upper portion 14 has a wide mouth portion 16 at the upper end, and the lower portion 15 has cutout recesses 18, 19 having a wide mouth portion 17 at the lower end. Since the notches 18 and 19 have a fan shape that expands as the distance from the flange portion 5 increases, the mold can be easily removed and manufacturing can be easily performed.

In this embodiment, the embedding portion 2 of the filter 2 is
Except for 0, two notches 18 and 19 are provided. However, one notch may be provided, or three or more notches may be provided for a large filter element.

In another embodiment shown in FIG. 2, in addition to the configuration of the embodiment shown in FIG. 1, an elastic material 23 such as rubber is injected into the notches 19 and 20.

In the above configuration, the cutout recesses 18 and 19 are formed in the outer frame portion 13 parallel to the ridge line 8 of the filter body 2, but the cutout recesses 18 and 19 are formed along the direction parallel to the ridge line 8 of the filter medium 1. The notches 18 and 19 absorb the curvature of the outer frame 6 to prevent the deformation of the filter body 2, whereby the ridgeline of the filter medium 1 does not bend.
The whole can work effectively.

[0016]

According to the above construction, the notch concave portion absorbs the curvature of the outer frame along the direction parallel to the ridge line of the filter medium, while the notch concave portion is easy to manufacture. As a result, the ridgeline of the filter medium does not bend, so that the entire filter medium can work effectively.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a filter element according to an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing a filter element according to another embodiment of the present invention.

FIG. 3 is a perspective view showing a conventional filter element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filtration material 2 Filter body 5 Collar part 6 Outer frame 8 Ridge 11,12 Retention plate 16,17 Wide mouth part 18,19 Notch recessed part 20 Embedded part 22 Reinforcement plate 23 Elastic material

Continued on the front page (72) Inventor Kazuo Ishikawa 588-8 Gosanjo-cho, Hikone-shi, Shiga F-term (reference) 4D058 JA14 KA01 KA14 SA07

Claims (2)

[Claims] 1. A band-shaped filter medium is bent into a bellows shape to form a filter, and the upper four sides of the filter are formed in a synthetic resin outer frame having a packing flange protruding outward from the center in the thickness direction. And a filter element formed by embedding a lower portion of the filter body at both ends along a bent ridge line of the filter body in a holding plate made of synthetic resin, wherein the filter element comprises four pieces constituting the outer frame. A filter element formed by forming one or a plurality of notched concave portions in a piece parallel to a ridge line of the filter medium. 2. The filter element according to claim 1, wherein the cut-out recess has a fan-like shape that expands away from the packing collar.