JPH0218893B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fluid filter used in an air cleaner for an automobile internal combustion engine.

[Conventional technology]

The applicant has previously provided a ring-shaped filtration part having a number of planar ring-shaped cross-sectional corrugated parts extending outward to which radial abutting parts are joined, and the outermost part of this filtration part is We have proposed a filter structure with joined support parts (Patent application 172429/1986).
No.: Japanese Patent Publication No. 58-74122).

[Problem to be solved by the invention]

In the above-mentioned filter body, the abutting portions of the ring-shaped filter portions are joined together, and then the support portion is joined to the outermost portion of the filter portion to form the filter body, so that the manufacturing process of the filter body is troublesome.

In view of the above points, the present invention aims to simplify the manufacturing process of a filter body, and to increase the bonding strength of the abutted portions.

[Means to solve the problem]

In the present invention, there is provided a ring-shaped filter portion having an abutment portion in the radial direction and a large number of planar ring-shaped cross-sectional corrugated portions extending outward; The method includes: a streak-like resin holding part that is joined together to maintain the ring-shaped shape of the filtering part; and a resin support part joined to the outermost part of the plurality of cross-sectional corrugated parts of the filtering part. , the holding part and the supporting part are integrally formed with each other by resin molding, and the holding part is located in the vertical direction between adjacent of the plurality of cross-sectional corrugated parts at the abutting part of the filtration part. It employs technical means to do so.

〔Example〕

The present invention will be explained in detail below using specific examples.

The shape of the filter medium constituting the filter body in the present invention is as shown in FIG.
It has a trapezoidal plate shape in which the length of A' is short and the length of the other end I-I' is long. When this trapezoidal filter medium 1 is bent and pleated into a wavy cross-sectional shape along the folding lines B-B', C-C',...H-H' with a constant folding width, both ends of the filter medium 1 are shown in Fig. 2. A filter medium 2 having a wavy cross-sectional shape with a plurality of continuous top rows and bottom rows formed therebetween.
is obtained. As shown in Fig. 3, this filter medium 2 is
The folded filter medium 2 shown in the figure has a ring shape (including an ellipse) with the folded area of the folded filter medium 2 having a small folded area, that is, the shorter length side A-A' being on the inner periphery and the longer length side I-I' being on the outer periphery. When curved, a large number of planar ring-shaped cross-sectional corrugated portions 3 continuously extend outward from the middle.
A planar ring-shaped filter section 3 with a is obtained.

Incidentally, in the radial direction of this filter portion 3, an abutting portion indicated by the symbol Y in FIG. 3 is formed.

By putting the filtration part 3 obtained in this way into a mold and molding it with resin, as shown in Fig. 4,
A resin holding part 4 joins a large number of cross-sectional corrugated parts 3a at the abutting part Y of the filtration part 3 to hold the filtration part 3 in a ring shape, and a resin holding part 4 joins a large number of cross-sectional corrugated parts 3a at the abutting part Y of the filtration part 3, and A resin support portion 5 provided on the cross-sectional corrugated portion 3a of the outer peripheral portion, and a resin center portion 6 provided on the cross-sectional corrugated portion 3a of the innermost peripheral portion of the filtration portion 3 to serve both as a seal and support for the inner peripheral portion. A filter body 7 is obtained which is integrally molded.
To explain this filter body in detail, FIG. 5 shows a cross section taken along the line AA in FIG. 4. In FIG. 5, the holding part 4, the center part 6, and the supporting part 5 are integrally formed by resin molding. Moreover, the holding part 4, the center part 6, and the support part 5 are integrally connected to the filter part 3 by resin molding. Note that the holding part 4 is attached to the filtering part 3 in a direction that crosses a large number of cross-sectional corrugated parts 3a, that is, as can be seen from FIG.
The holding portion 4 is provided over the entire radial abutting portion Y of the filter portion 3 shown in FIG. As shown, at the abutting portion Y, the cross-sectional corrugated portions 3a are provided so as to be located over the entire vertical direction inside the adjacent portions of the corrugated portions 3a.
Note that the holding portion 4 has a linear shape as shown in the figure.

FIG. 6 shows a BB cross section in FIG. 4.

Next, a method for manufacturing the filter body 7 shown in FIG. 4 will be explained with reference to FIGS. 7 to 10. FIG. 7 shows a method for forming the support portion 5 for the filter portion 3. The filter portion 3 is housed in molds 8 and 9. The molds 8 and 9 form a ring-shaped space 10 around the entire periphery of the filter portion 3 in which the support portion 5 is to be integrally molded. By injecting resin such as polypropylene, nylon, or urethane into this space 10,
A support portion 5 is integrally molded with resin into the cross-sectional corrugated portion 3a of the outermost peripheral portion of the filter portion 3.

FIGS. 8 and 9 show a method of integrally molding the holding part 4 and the supporting part 5, which join the abutting part Y of the filtration part 3, from a resin material at the same time. Note that FIG. 9 is a cross section taken along line C-C in FIG. 8. In FIGS. 8 and 9, the filter portion 3 is placed in molds 8 and 9 with a gap 11 (see FIG. 3) formed at the abutting portion Y thereof. These molds 8 and 9 are formed with a holding part space 12 and a support part space 10 (same space as in FIG. 7) for joining the abutting part Y of the filtration part 3. FIG. 10 shows the entirety of FIGS. 7 and 8, including the portion forming the center portion 6. FIG. Reference numeral 13 is a space for molding the center portion 6. The resin is injected into these spaces 10, 12, and 13 to form the holding part 4, the supporting part 5, and the center part 6 into the filter part 3 as an integral structure.

Other embodiments of the present invention are shown in FIGS. 11 and 12. In this embodiment, in FIGS. 11 and 12, a supporting part 5 and a central part 6 are provided on the clean side of the filtration part 3.
A reinforcing part 16 is provided so as to bridge between the two, and the reinforcing part 16, the supporting part 5, and the center part 6 are integrally molded with each other from a resin material. Cross-sectional corrugated portion 3a of portion 3
This prevents the filtering portion 3 from changing, and also improves the strength of the filter portion 3 when it is supported in cooperation with the support portion 5.

13 and 14, the filter body 7 of FIG. 11 is shown.
The manufacturing method of the reinforcing portion 16 is shown. FIG. 14 shows a cross section taken along line E-E in FIG. 13. In FIGS. 13 and 14, the filtration part 3 is a mold 8,
9, and by injecting resin into the space 20 of the reinforcing part 16 part and the space 19 of the outer peripheral support part 5 in FIG. Reinforcement part 16 coupled to
is obtained. The center portion 6 and the holding portion 4 are molded in the same manner as shown in FIGS. 7 to 10 above. In addition,
As is clear from FIG. 12, the holding part 4, the supporting part 5, the reinforcing part 16, and the center part 6 are integrally formed by resin molding.

15 to 17 show still other embodiments of the present invention. In the embodiments shown in FIGS. 11 and 12, the reinforcing part 6 is provided on the downstream side of the fluid of the filtration part 3, but it is also provided on the upstream side to further improve the strength of the corrugated cross-sectional part 3a. The number of reinforcing portions 6 is increased. That is, in FIGS. 15 to 17, a center portion 6, a holding portion 4, reinforcing portions 16, 17, 18, and a support portion 5 are integrally molded on the filter portion 3.

FIG. 18 shows an example in which the filter body 17 of FIG. 6 is applied to an air cleaner for an internal combustion engine. In FIG. 18, to explain the structure, the center part 6 and the support part 5
A filter body 7 integrally formed with the filter body 7 is housed between a case 27 having a holding frame 22 for holding the filter body 7 and a cap 21 having an air intake port, and the case 27 and the cap 21 are connected to the outer periphery. The support part 5 of the filter body 7 is held between the attached elastic bodies 23 and 28 such as rubber, and the inner peripheral part of the filter body 7 is inserted between the center part 6 and the cap 21 via the elastic body 26 such as rubber. It is sealed with the mounting screw 24 and nut 25 attached to the carburetor and is attached to the engine.

Contaminated air entering from the air intake port travels in the direction of the arrow, is purified by the filter 7, and is supplied to the engine.

In this application example, the inner and outer peripheries of the filter body 7 are sealed using elastic bodies 28 and 23 such as rubber attached to the case 27 and the cap 21, but a ring-shaped seal is attached to the support portion 5 of the filter body 7. An elastic body may be attached. Further, if the center portion 6 and the support portion 5 are made of an elastic material such as urethane resin foam or sponge rubber, there is no need to use the elastic members 28, 23, and 26.

The present invention is not limited to the above embodiments,
Various modifications are possible as described below.

(1) The planar shape of the plate-shaped filter medium 1 is trapezoidal,
For example, a triangular filter medium in which one side is much closer to zero than the other side may be used. Also,
By making one side A-A' and I-I' of the filter medium 1 in FIG. 1 can be made into a ring shape.

Moreover, the length dimension of one side part and the other end part of the filter medium 1 may be the same.

(2) Furthermore, it is of course possible to create the above-mentioned planar filter medium by folding an arbitrarily shaped filter medium like origami.

(3) The filtration portion 3 does not need to have the cross-sectional corrugated portion 3 continuously between both ends, and may have a structure in which the cross-sectional corrugated portion is not provided in part. This case is convenient when arranging other functional parts inside the filter body. Further, the cross-sectional shape of the cross-sectional corrugated portion 3a is triangular,
Various shapes can be considered, such as a sinusoidal shape or a rectangular shape such as a rectangle. Furthermore, the filter portion 3 can be constructed by joining a large number of filter media pieces.

(4) The folding lines of the filter medium 1 do not need to be provided at equal intervals, and of course, the intervals between the folding lines may be different. As a result, the filtration portion can be formed into a continuous stepped shape in vertical cross section as shown in FIG.

(5) The top surface of the cross-sectional corrugated portion 3 of the filtration portion 3 is concentric in a flat state, but this can be changed by gradually increasing (or decreasing) the interval between the fold lines between both ends of the filter medium 1. It can be made eccentric as shown in Figure 20.

Alternatively, the filter section 3 may be elliptical. This is constructed by combining the folding lines of the filter medium 1 in FIG. 1 into arcs and straight lines to form a U-shaped filtering portion, and then joining the U-shaped filtering portions against each other.

(6) When joining the abutting portions of the filtration portion 3 with a resin material as shown in FIG. side of
A'-I', make A-I uneven).

(7) The holding part 4, the support part 5, the center part 6, and the reinforcing parts 16, 17, 18 are not limited to polyurethane, polypropylene, or nylon, and may of course be made of other resins (foamed or non-foamed). Since synthetic rubber is also a resin in a broad sense, it may be constructed using synthetic rubber.

(8) The material of the filter medium 1 may be any material as long as it filters the fluid.

(9) The filtration element of the present invention can be applied to filters for various liquids and gases in vehicles, and has a wide range of other uses.

〔Effect of the invention〕

The effects of the present invention detailed above are enumerated as follows.

(a) In the filter body of the present invention, the resin holding portion coupled to the abutting portion in the radial direction of the many planar ring-shaped cross-sectional corrugated portions of the ring-shaped filter portion has a plurality of cross-sectional corrugated portions at the abutting portions. Since the cross-sectional corrugated portion of the ring-shaped filtration portion is located in the vertical direction between adjacent portions, the radial abutting portion of the cross-sectional corrugated portion has a planar ring-like shape. Therefore, due to the abutting structure of the radial abutting portion of the filtration portion, the cross-sectional corrugated portion of the filtration portion tends to be more easily deflected, and the joint at the abutting portion does not separate due to this deflection. Although it is necessary to pay special attention to this, the load in the radial direction can be reliably received by the resin holding part by positioning it in the vertical direction between the many adjacent cross-sectional corrugated parts of the abutting part. becomes possible. Therefore, even if the abutting portion is subjected to a radial load, it is possible to avoid deflection of the cross-sectional corrugated portion in the abutting portion, thereby ensuring the joining of the abutting portion by the holding portion and avoiding separation of the bonded portion. can.

(b) Further, in the present invention, the holding portion can maintain the spacing between adjacent cross-sectional corrugated portions and prevent the cross-sectional corrugated portions from coming into close contact with each other;
Therefore, the holding portion can serve both of the function of ensuring the abutting portions of the large number of corrugated cross-sectional portions of the filtration portion and the function of preventing the corrugated cross-sectional portions from coming into close contact with each other.

(c) Furthermore, in the present invention, since the holding portion has a linear shape, the holding portion has a reliable joining function of the abutting portions of the many cross-sectional corrugated portions of the filtration portion, as described above. Although it also has the function of preventing the adhesion of the cross-sectional corrugated portion, the holding portion occupies a small proportion of the large number of cross-sectional corrugated portions, and therefore hardly obstructs the passage of fluid to the filtration portion. , an increase in fluid passage resistance can be avoided.

(d) Furthermore, according to the present invention, the support part connected to the outermost part of the many cross-sectional corrugated parts of the filtration part and the holding part are made into an integral structure by resin molding,
When resin-molding the holding portion for joining the abutting portions of the filtration portion, the supporting portion can be resin-molded at the same time, and therefore the manufacturing process can be simplified.

[Brief explanation of drawings]

Figures 1 to 3 are diagrams showing the manufacturing process of the filter element according to the present invention. Figure 1 is a developed view of the filter element, and Figure 2 is a
The figure is a perspective view showing the filter medium in Figure 1 in a bent state;
FIG. 3 is a perspective view showing the filter medium shown in FIG. 2 in a curved state, FIGS. A perspective view of the body, FIG. 5 is a sectional view taken along line AA in FIG. 4, FIG. 6 is a sectional view taken along line BB in FIG.
Fig. 7 is a partial sectional view of a mold showing a method of integrally molding the support part with the filter part, and Fig. 8 shows the holding part and the support part of the abutting part of the filter part. FIG. 9 is a sectional view taken along the line CC in FIG. 8, and FIG. 10 is a sectional view showing the entire mold part including FIGS. 7 and 8. , FIG. 11 is a perspective view showing another embodiment of the present invention, FIG. 12 is a sectional view taken along line DD in FIG. 11, and FIGS. Figure 13 is a partial sectional view of the mold, and Figure 14 is E in Figure 13.
15 to 17 are views showing still other embodiments of the present invention, in which FIG. 15 is a perspective view of the filter, and FIG. 16 is a sectional view taken along line 15-F, and FIG. 17 is a sectional view taken along line GG in FIG. 15, FIG. 18 is a sectional view showing an example in which the filter body shown in FIG. 20th partial cross-sectional perspective view showing another embodiment of
The figure is a plan view showing still another embodiment of the shape of the filter portion in the present invention. DESCRIPTION OF SYMBOLS 1... Filter medium, 3... Filtering part, 3a... Cross-sectional corrugated part, 4... Holding part, 5... Supporting part.

Claims (1)

[Scope of Claims] 1. A ring-shaped filtration part having an abutting part in the radial direction and having a large number of planar ring-shaped cross-sectional corrugated parts extending outward; and the abutting part of the filtration part. A streak-like resin holding part that is joined to the whole to maintain the ring-shaped shape of the filtering part, and a resin support part that is joined to the outermost part of the plurality of cross-sectional corrugated parts of the filtering part. The holding part and the supporting part are integrally formed with each other by resin molding, and the holding part is arranged in a vertical direction between adjacent sections of the plurality of cross-sectional corrugated parts at the abutting part of the filtration part. A fluid filtration body characterized by being located at. 2. The filtration part is formed by bending a plate-shaped filter medium, which is short at one end and long at the other end, into a wave-shaped cross section between the one end and the other end, and bends the bent filter medium with the one end inside and the other end Claim 1, characterized in that the ring is curved into a planar ring shape with the curved edges facing outward, and the curved ends are butted against each other, and the entire butted portion is joined by the holding portion.
The fluid filter body described in Section 1.