JP2005140021A - Air filter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the manufacture of an air filter device and improve the efficiency in replacing a filter. <P>SOLUTION: The air filter device 10 comprises a first frame 11 and a second frame 21 fitted to each other in a detachable manner, and a filter loading part 31 formed between a filter supporting part 14 provided in a suction opening 13 in a frame 12 of the first frame 11 and a filter supporting part 24 provided in a suction opening 23 in a frame 22 of the second frame 21. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an air filter device suitable for use in an intake system of an engine.

  In the air filter device of Patent Document 1, a filter is surrounded by a frame to form a rectangular unit, and packing is integrally formed on the outer edge of the frame.

In the air filter device of Patent Document 2, a filter is loaded into a filter loading portion formed by an upper frame and a lower frame, and concave and convex engaging portions provided in a direction perpendicular to the fitting direction on the fitting surfaces of both frames are engaged with each other. It has been made.
Japanese Patent Laid-Open No.5-195889 JP-A-8-296512

The air filter device of Patent Document 1 has the following problems.
(1) Since the filter, the frame and the packing are integrally formed, the manufacturing equipment and the manufacturing work become complicated.

  (2) Since the entire air filter device is integrally molded after use, it is not possible to replace the single filter, and the entire filter becomes waste and cannot be separated, which is undesirable in terms of recycling and the environment.

The air filter device of Patent Document 2 has the following problems.
(1) Since the upper and lower frames are integrated by engaging the projections and depressions, the manufacturing equipment and manufacturing operations become complicated.

  (2) After use, it is difficult to disassemble the upper and lower frames, the filter itself cannot be replaced, everything becomes garbage, and separation processing cannot be performed, which is undesirable in terms of recycling and the environment.

  An object of the present invention is to simplify the manufacture of an air filter device and improve the exchangeability of the filter.

  According to the first aspect of the present invention, the first frame and the second frame are detachably fitted to each other, the filter support portion provided in the intake opening in the frame of the first frame, and the intake opening in the frame of the second frame are provided. This is an air filter device in which the space between the filter support portions is a filter loading portion.

  According to a second aspect of the present invention, in the first aspect of the present invention, a mounting flange is provided on each of the outer surface of the frame of the first frame and the outer surface of the frame of the second frame, and the first frame and the second frame are fitted in the fitting direction thereof. It is possible to form a gap between the mounting flanges in a state where they are in contact with each other.

  According to a third aspect of the present invention, in the first or second aspect of the invention, in the state in which the outer surface or the inner surface of the frame of the second frame is fitted to the inner surface or the outer surface of the frame of the first frame, A gap can be formed therebetween, and a convex portion for eliminating the gap is provided on the back side in the fitting direction on at least one of the fitting surfaces.

(Claim 1)
(a) Since the first frame and the second frame of the air filter device are detachably fitted, the first frame and the second frame can be easily disassembled and the filter can be attached and detached. After using the air filter device, the filter can be detached and replaced, and there is no inconvenience such as disposal of the first frame and the second frame as waste, which is convenient for recycling and environmental reasons.

(Claim 2)
(b) When the air filter device is attached to the air cleaner box or the like, when the mounting flange of the first frame and the mounting flange of the second frame are sandwiched, both flanges are flexibly deformed due to the presence of the gap between them, Can be installed without play.

(Claim 3)
(c) When the frame of the first frame and the frame of the second frame are fitted, the fitting can be started smoothly due to the presence of a gap between the fitting surfaces in the fitting initial stage, and the presence of the convex part at the fitting finishing stage. The gap disappears and can be fitted without play.

  FIG. 1 is a cross-sectional view showing a mounting state of an air filter device, FIG. 2 shows an air filter device, (A) is an exploded cross-sectional view, (B) is an assembled cross-sectional view, and FIG. 3 shows an air filter device. ) Is an exploded side view, FIG. 4B is an assembled side view, FIG. 4 is a top view showing the first frame, and FIG. 5 is a bottom view showing the second frame.

  FIG. 1 shows a state in which an air filter device 10 is attached to an air cleaner box 1 connected to an intake system of an engine. The air cleaner box 1 includes a case 2 and a case 3, and an air filter device 10 is built in the case 2 and the case 3 as will be described later, and an annular mounting portion 2 A on the outer periphery of the case 2 and an annular mounting on the outer periphery of the case 3. The part 3A is coupled so as to be openable and closable by bolting or the like. As shown by the arrows, air enters from the inlet 4 of the case 2, passes through a filter 30 (to be described later) of the air filter device 10 and removes dust, and then is supplied into the engine from the outlet 5 of the case 3. .

  As shown in FIGS. 2 and 3, the air filter device 10 fits the first frame 11 and the second frame 21 so as to be disassembled. The first frame 11 and the second frame 21 are preferably injection-molded in advance with an elastic synthetic resin such as polypropylene. The first frame 11 has, for example, a rectangular frame 12, and the second frame 21 has, for example, a rectangular frame 22. In this embodiment, the first frame 11 has a first frame 11 on the inner surface side of the frame 12. The frame 22 of the two frames 21 is fitted.

  As shown in FIGS. 2 to 4, the first frame 11 is formed with an intake opening 13 on the upper end side in the inside view of the frame body 12, and a filter support portion 14 formed of ribs that intersect the intake opening 13 vertically and horizontally. Is provided.

  As shown in FIGS. 2, 3, and 5, the second frame 21 has a suction opening 23 formed on the lower end side in the inside of the frame 22, and a filter comprising ribs that intersect the suction opening 23 vertically and horizontally. A support 24 is provided.

  In the state in which the first frame 11 and the second frame 21 are fitted, the filter device 10 serves as a filter loading portion 31 between the filter support portion 14 and the filter support portion 24, and allows the filter 30 to be loaded therein. In this embodiment, since the frame body 22 of the second frame 21 is fitted on the inner surface side of the frame body 12 of the first frame 11 and the first frame 11 is covered with the second frame 21, the frame of the second frame 21. The inside of the body 22 is the filter loading unit 31.

  The first frame 11 is provided with an annular mounting flange 15 on the outer peripheral surface of the frame body 12. In the present embodiment, the mounting flange 15 is provided at a position spaced apart from the lower end surface of the frame body 12 in the vertical direction (the fitting direction with the second frame 21) in the figure of the outer peripheral surface of the frame body 12. An abutting portion 16 with the second frame 21 is defined between the lower end surface of the first frame and the mounting flange 15.

  The second frame 21 is provided with an annular mounting flange 25 on the outer peripheral surface of the frame body 22. In this embodiment, an abutting portion 26 that abuts against the abutting portion 16 of the first frame 11 is provided immediately above the mounting flange 25 in the vertical direction in the drawing of the outer peripheral surface of the frame body 22.

  The air filter device 10 is fitted with the first frame 11 and the second frame 21, and in the state where the abutting portions 16 and the abutting portions 26 are abutted in the fitting direction, A gap 32 is formed between the mounting flanges 25.

  The air filter device 10 has a gap (not shown) between the fitting surfaces 12A and 22A in a state where the outer surface of the frame 22 of the second frame 21 is fitted to the inner surface of the frame 12 of the first frame 11. ) And at least one of the fitting surfaces 12A and 22A, in the present embodiment, a convex portion 27 that eliminates the gap is provided on the inner side of the fitting surface 22A in the fitting direction. In the present embodiment, convex portions 27 are provided at two locations immediately above the mounting flange 25 and the abutting portion 26 on each outer surface (fitting surface 22A) of the frame body 22 of the second frame 21, and thus at all eight locations. .

  The air filter device 10 has a cross-sectional shape of the filter support portions 14 and 24 of the first frame 11 and the second frame 21 in the direction in which air passes through the air filter device 10 as shown in FIGS. It shall be elongated (streamline shape) along the vertical direction, and the resistance to air flow will be reduced.

  The filter 30 has a flat plate shape, for example, a three-layer structure in which a coarse outer filter, a fine intermediate filter, and a coarse filter are joined. These filters are made of a porous resin, in this embodiment, a polyurethane resin. The filter is infiltrated with a high-viscosity adhesive to enhance the dust collection effect.

  Therefore, the air filter device 10 fits the first frame 11 and the second frame 21 with the filter 30 loaded as described above, and the frame body 12 of the outer first frame 11 as shown in FIG. Is inserted into the inner periphery of the case 2 of the air cleaner box 1. Then, the upper surface of the mounting flange 15 of the first frame 11 is applied to the mounting portion 2A of the case 2, the mounting portion 3A of the case 3 is applied to the lower surface of the mounting flange 25 of the second frame 21, and the mounting portions 2A and 3A are attached. By fastening with bolts, the mounting flanges 15 and 25 of both the frames 11 and 21 are clamped by their mounting portions 2A and 3A, and the air filter device 10 is incorporated in the air cleaner box 1 in an airtight manner. At this time, the mounting flanges 15 and 25 of both the frames 11 and 21 are elastically bent and deformed by the clamping force of the both mounting portions 2A and 3A, and the both mounting portions 2A and 3A are not loose and maintain airtightness. It is caught.

According to this embodiment, there exist the following effects.
(a) Since the first frame 11 and the second frame 21 of the air filter device 10 are detachably fitted, the first frame 11 and the second frame 21 can be easily disassembled, and the filter 30 can be attached and detached. After use of the air filter device 10, the filter 30 can be attached and detached and replaced, and there is no inconvenience such as disposal of the first frame 11 and the second frame 21 as waste, which is convenient for recycling and environmental reasons.

  (b) When the air filter device 10 is attached to an air cleaner box or the like, when the mounting flange 15 of the first frame 11 and the mounting flange 25 of the second frame 21 are sandwiched, both the flanges 15 and 25 have an interval 32 between them. It flexes and deforms elastically due to its presence and can be mounted without play.

  (c) When the frame body 12 of the first frame 11 and the frame body 22 of the second frame 21 are fitted, at the initial fitting stage, the fitting can be started smoothly due to the presence of a gap between the fitting surfaces 12A, 22A, At the fitting end stage, the gap disappears due to the presence of the convex portion 27, and the fitting can be performed without play.

  Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. Is included in the present invention.

FIG. 1 is a cross-sectional view showing a mounting state of the air filter device. 2A and 2B show an air filter device, where FIG. 2A is an exploded sectional view and FIG. 2B is an assembled sectional view. FIG. 3 shows an air filter device, (A) is an exploded side view, and (B) is an assembled side view. FIG. 4 is a top view showing the first frame. FIG. 5 is a bottom view showing the second frame.

Explanation of symbols

10 Air Filter Device 11 First Frame 21 Second Frame 12, 22 Frame (Frame)
12A, 22A Fitting surface 13, 23 Intake opening 14, 24 Filter support portion 15, 25 Mounting flange 16, 26 Abutting portion 27 Protruding portion 30 Filter 31 Filter loading portion 32 Interval

Claims (3)

  The first frame and the second frame are detachably fitted, and a space between the filter support provided in the intake opening in the frame of the first frame and the filter support provided in the intake opening in the frame of the second frame An air filter device as a filter loading unit.   A mounting flange is provided on each of the outer surface of the frame of the first frame and the outer surface of the frame of the second frame, and the first frame and the second frame are brought into contact with each other in the fitting direction between the mounting flanges. The air filter device according to claim 1, wherein an interval can be formed. In a state where the outer surface or the inner surface of the frame of the second frame is fitted to the inner surface or the outer surface of the first frame, a gap can be formed between the fitting surfaces, and at least of the fitting surfaces The air filter device according to claim 1 or 2, wherein a convex portion for eliminating the gap is provided on the back side in the fitting direction on one side.

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