JPH0899011A - Filter element - Google Patents

Abstract

PURPOSE: To exert uniformly a pressing force even on a side of a packing which is not pressed by a rib of a casing by means of a press plate by fitting press plates on at least two corners among four corners of a frame body of a rectangular filter element and bringing them into tight contact with the packing extending in the transverse direction over the whole periphery from the lower end part of the frame body. CONSTITUTION: Pleated filter material 2 is surrounded by a frame body 3 and they are bound together and a packing 4 is fixed on the whole lower end part of the frame body 3 to prepare a filter element 1. Press plates 9, 10, 11 and 12 are fitted on four corners of the frame body 3 and are tightly adhered to the upper face of the packing 4. When the filter element 1 is stored in a casing of an air filter and is pinched by pressing the upper face of the packing 4 by the rib of the casing, even if there exists a side which is not pressed by the rib, a pressing force is transmitted from the press plate pressed by the rib and airtightness is kept over the whole periphery of the packing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter element mounted on an air cleaner or other air filter of an internal combustion engine.

[0002]

2. Description of the Related Art Conventionally, there is known a rectangular filter element in which end faces and side faces of a fold-folded filter medium are surrounded by a rectangular frame, and packing is attached to the lower surface of the frame over four sides. For example, there is an air cleaner filter disclosed in Japanese Utility Model Publication No. 55-6443. As in this example, the packing is provided so as to extend laterally on four sides from the lower surface of the frame body, the lower surface of the packing is supported by the peripheral portion of the body, and the upper surface is pressed by the ribs provided on the peripheral edge of the cover, and the pressed packing The close contact between the lower surface and the peripheral edge of the body maintains the clean side seal.

[0003]

The conventional filter element is pressed over the entire circumference of the upper surface of the packing by the ribs provided over the four peripheral edges of the cover of the air filter,
Since the peripheral edge of the body and the lower surface of the packing were in close contact with each other due to almost uniform pressing force, no problem was caused in maintaining the seal on the clean side. However, it is necessary to open one side of the filter element as the air circulation side due to the demand for reduction of passage resistance of the air filter or the restriction on the shape of the casing in the engine room of the automobile air cleaner. As in the case of the cover of Fig. 4, there are some cases where the four sides of the packing cannot be pressed by the ribs over the entire circumference and only the three sides are pressed, and the ribs are not provided on the other side due to the air flow passage. ing. In such a case, in the conventional filter element, the packing on one side, which is on the distribution side and is not pressed by the rib, tends to rise, and the surface pressure between the lower surface of the packing and the peripheral edge of the body becomes insufficient, resulting in incomplete sealing, resulting in a clean condition. Air leaks to the side.

[0004]

A filter element according to the present invention has two ends parallel to at least two adjacent corners of the four corners of a rectangular frame body having a fold-folded filter medium joined to the inner surface. Is provided with a pressing plate projecting in the lateral direction at right angles to the side, and is closely attached to the packing provided by projecting in the lateral direction from the lower ends of the four sides of the frame. This close contact is made by closely contacting the pressing plate with the upper surface of the packing or by closely embedding it in the packing.

[0005]

The filter element is mounted and used in a state in which the packing is held between the peripheral portion of the body of the air filter and the ribs on the peripheral portion of the cover. 3 ribs around the cover
If only the side is provided, replace the holding plate with a ribless 1
At the corners at both ends of the side, the ribs on the other side are pressed.
The pressing force received by the pressing plate is transmitted from the pressing plates at both ends through the lower end of the frame between them to the part of the packing that is not pressed by the ribs, so there is no tendency to rise even if the ribs do not press directly. .

[0006]

Embodiment A filter element 1 of the embodiment shown in FIG.
Is a fold-folded filter paper 2 and the end faces 2a, 2b of the filter paper 2,
A frame body 3 in which the side surfaces 2c and 2d are joined by an adhesive, and a packing 4 which is fixed to the lower end portion of the frame body 3 and juts out in the lateral direction of the outer periphery of four sides, and is made of a soft material, in this example, a urethane foam material. Composed of and. The frame 3 is an end surface 2 of the filter paper 2.
Paper end plates 5 and 6 for adhering a and 2b, and a side surface 2 of the filter paper 2.
bent portions 7a, 7b, 8a, 8 which are made of iron side plates 7 and 8 for adhering c and 2d, and are bent at both ends of the side plates 7 and 8.
It is formed by stacking and fixing b on both ends of the end plates 5 and 6.
The bent portions 7a, 7b, 8a, 8b are provided at their lower ends with extended portions, which are bent laterally to form the holding plates 9, 10, 11, 12.

The packing 4 is fixed to the entire circumference of the lower end portion of the frame 3 over four sides and has an inverted triangular cross section. The upper surface of the packing 4 projects in a horizontal direction in a substantially horizontal direction. Two upper surfaces 4c and 4d are formed at right angles. The pressing plates 9 and 11 are closely attached to the upper surface 4a, and the upper surface 4b
The pressing plates 10 and 12 are in close contact with each other. Further, the upper edges of the end plates 5 and 6 and the side plates 7 and 8 of the frame body 3 are bent inward to form a reinforcing portion for preventing the filter paper 2 from being deformed, and the lower edges of the side plates 7 and 8 are bent inward to seal the packing 4. And the lower end of the side plate prevents the packing 4 from being sheared. Further, the side plates 7 and 8 are provided with openings 7c and 8c to allow air to flow.

The filter element 1 is shown in FIG.
As shown in (A cross section) and FIG. 3 (BB cross section of FIG. 2), the air cleaner 20 is formed by being housed in a casing 21 composed of a body 22 and a cover 23. Casing 21
Is a substantially rectangular parallelepiped-shaped container, and approximately 1/2 of the mating surface of the body 22 and the cover 23 is an inclined surface, and the filter element 1 is sandwiched in this portion. The body 22 is provided with an air inlet 24 and an air outlet 25, and the groove 2 is formed on the entire periphery.
6 are provided. The body 22 is combined with a peripheral edge cutting portion 28 of the cover 23 via a body packing 27 fitted in the groove 26, and is tightened by a grip 29. Along the inner side of the stepped portion 28 of the cover 23, the rib 30 has three peripheral edges (see FIG. 2).
2 side parallel to the paper surface and the side appearing in cross section on the right side of FIG. 2), presses the upper surfaces 4a, 4b, 4d of the packing 4 of the filter element 1 and forms around the inclined surface of the body 22. It is crimped to the packing seat 31. The rib 30 does not exist on the upper surface 4c on one side of the packing 4.

As shown in FIG. 4 (arrow C--C in FIG. 2), the side plate 7 of the frame 3 of the filter emerent 1 forms a bent portion 7a, and the extended portion is bent in the lateral direction to hold the pressing plate 9.
Is formed. The pressing plate 9 is attached to the packing seat 3 by the rib 30 of the cover 23 pressing the upper surface 4a of the packing 4.
Pressed to 1. The pressing plate 10 (FIG. 1) as well as the pressing plate 9 is pressed by the ribs 30, and these pressing forces are transmitted to the side plates 7 and uniformly press the one side upper surface 4C of the packing 4, so that they are pressed by the ribs 30. Other three sides 4a, 4b,
The packing 4 is brought into close contact with the packing seat 31 located on the lower side of the inclined surface of the body 22 by exerting a pressing force substantially equal to 4d.

As described above, the ribs 3 are formed by the pressing plates 9 and 10.
The seal of the part without 0 is secured. Note that the holding plates 11 and 12 of the element 1 are not necessary in this case, but they are necessary when mounting this element in a form rotated by 180 °, and it is necessary to consider the left and right directions when mounting the element 1. It is convenient because it disappears. Further, the pressing plate may be embedded in the packing, as long as it comes into close contact with the packing and receives the pressing force of the rib.

[0011]

In this prismatic filter element, since the holding plates are provided at least at two corners of the four corners of the frame body, the shape of the casing that accommodates the pressing plates is restricted, and the packing on the peripheral edge of the element is limited to three sides. Even when it is not possible to press, the pressing force is uniformly applied over the entire circumference of the packing, the floating portion of the packing is eliminated, and the clean side can be completely sealed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment.

FIG. 2 is a cross-sectional view showing a mounted state of the filter element of the embodiment.

3 is a diagram showing a main part of a BB cross section of FIG. 2;

FIG. 4 is a diagram showing a main part of a CC cross section of FIG. 2;

[Explanation of symbols]

 2 Filter paper (filter material) 3 Frame 4 Packing 4a, 4b, 4c, 4d Upper surface of packing 5, 6 End plate 7, 8 Side plate 9, 10, 11, 12 Holding plate

[Procedure amendment]

[Submission date] October 31, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

2. Description of the Related Art Conventionally, there is known a rectangular filter element in which end faces and side faces of a fold-folded filter medium are surrounded by a rectangular frame, and packing is attached to the lower surface of the frame over four sides. For example, there is an air cleaner filter disclosed in Japanese Utility Model Laid-Open No. 55-64453. As in this example, the packing is provided so as to extend laterally on four sides from the lower surface of the frame,
The lower surface of the packing is supported by the peripheral portion of the body, the upper surface is pressed by ribs provided on the peripheral edge of the cover, and the clean side seal is maintained by the close contact between the pressed lower surface of the packing and the peripheral portion of the body.

Claims (1)

[Claims] 1. An end face and a side face of a sheet-shaped filter medium folded and folded are joined to an inner surface of a rectangular frame body, and a packing which is laterally extended from lower end portions of four sides of the frame body is formed of a soft elastic material. In this filter element, at least two adjoining corners of the four corners of the frame are provided with presser plates protruding laterally at right angles to the ends of the two parallel sides, and the presser plates are brought into close contact with the packing. A filter element consisting of