JPH0221845B2 - - Google Patents

Description

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

[Conventional technology]

As a conventionally known overbody, Japanese Patent Application Laid-Open No. 57-140617
There is one shown in the publication.

This includes a ring-shaped over-element having a large number of corrugated sections extending outward, and a resin center portion and a resin supporting portion provided at the innermost and outermost parts, respectively, and the outermost part of the ring-shaped over-element. A striped resin holding part is provided on the cross-sectional corrugated part so as to bridge between the inner part and the outermost part and located between adjacent cross-sectional corrugated parts of the plurality of cross-sectional parts of the over-element. The holding portion holds the shape of the ring-shaped over-element.

[Problem to be solved by the invention]

According to the conventionally known device, the multiple corrugated cross-sectional portions of the ring-shaped over-element can be prevented from deflecting in the axial direction of the element through the cooperation of the holding portion, the center portion, and the support portion.

The present invention further develops this conventionally known method and aims to more reliably suppress the bending of the large number of cross-sectional corrugated portions in the axial direction of the ring-shaped over-element.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides a ring-shaped over-element having a large number of cross-sectional corrugated parts each having a planar ring-like shape extending outward, and a ring-shaped over-element having a plurality of cross-sectional waveforms of the ring-shaped over-element. a resin center part provided at the innermost part of the ring-shaped over-element; a resin-made support part provided at the outermost part of the plurality of cross-sectional corrugated parts of the ring-shaped over-element; provided in the plurality of cross-sectional corrugated portions so as to bridge between the innermost portion and the outermost portion of the cross-sectional corrugated portion, and to be located vertically between adjacent cross-sectional corrugated portions. and a plurality of radial resin holding parts having equal angular intervals and having a streak-like shape that holds the planar ring-like shape of the ring-shaped over-element, and the center part, the supporting part and the holding part are made of resin. It adopts the technical means of being formed into an integral structure by molding.

〔Example〕

The present invention will be explained in detail below using specific examples. FIG. 1 shows the shape of the material constituting the overbody of the present invention. The material 1 as a whole has a generally fan-like shape, with one end A-A' being short and the other end S-S' being long. This material 1 is provided with arc-shaped broken lines B-B'...R-R' having the same center.
Moreover, as is clear from FIG. 1, two groups with different intervals between broken lines are alternately repeated every other group. The above-mentioned fold line is formed using a heated roller or the like, so that the material 1 can be easily bent based on this fold line. Further, in this material 1, the distance between the broken line R-R' and the end S-S' is made large.

FIG. 2 shows a state in which the material 1 shown in FIG. 1 is bent along the fold line. Since the fold line of the material 1 is arc-shaped, the entire material is curved as shown in Fig. 2 after being bent, and by bending the material along the crease line, a large number of planar ring-shaped cross-sectional corrugated portions 2c that extend outward are formed. be done. Note that this cross-sectional corrugated portion 2c
As shown in FIG. 2, the top and bottom rows of the ring-shaped pass element 2 are gently sloped between the innermost and outermost peripheries. This is because, as mentioned above, the intervals between the fold lines of the material 1 are different.

FIG. 3 shows an overbody constructed using the above-mentioned overlay element 2, and FIG. 4 shows a cross section taken along line AA in FIG.

In FIGS. 3 and 4, reference numeral 4 denotes a central portion made of synthetic resin provided at the innermost periphery of the multiple cross-sectional corrugated portions 2c of the over-element 2, and has a hole 3 for attachment. . Reference numeral 5 denotes a synthetic resin connection that connects the butt ends of both sides of the material 1 (A-S and A'-S' in Fig. 1) in order to maintain the ring-shaped shape of the numerous cross-sectional corrugated portions 2c of the over-element 2. Department. This connecting part 5
are arranged so as to bridge between the innermost part and the outermost part of the large number of cross-sectional corrugated parts 2c. Furthermore, reference numeral 6 denotes a reinforcing section made of synthetic resin, and as is clear from FIG. There is. As shown in FIG. 3, the connecting portions 5 and the reinforcing portions 6 are arranged evenly, radially, at equal angular intervals over the circumferential direction of the filter element. Reference numeral 7 denotes a support portion made of synthetic resin and provided at the outermost periphery of the multiple cross-sectionally corrugated portions 2c of the over-element 2. The center portion 4, the connecting portion 5, the reinforcing portion 6, and the supporting portion 7 are integrally molded with each other and are integrally connected to a large number of corrugated cross-sectional portions 2c. Connecting part 5
As is clear from FIG.
It is located between the adjacent side surfaces of c and has a length spanning the entire length from its upper end to its lower end. In addition, the reinforcing portion 6 will also become clear from the explanation below,
It is located between the adjacent side surfaces of a large number of cross-sectional corrugated portions 2c, and has a length spanning the entire length from the upper end to the lower end. In addition, these synthetic resin materials are
Examples include polypropylene, nylon, urethane, and the like.

Next, a method for manufacturing the overbody having the above structure will be explained. For the purpose of explanation, please refer to Figure 2~
Use Figure 9.

First, the over-element 2 shown in Fig. 2 tends to return to its original state due to the elastic reaction force of the material, and therefore it is difficult to maintain it in the state shown in Fig. 2 even if it is bent along the fold line in Fig. 1. . Then, after bending, it is set in a mold having the same shape as shown in FIG. 2, and heat and pressure are applied. As a result, the over-element 2 whose shape is maintained as shown in FIG. 2 is obtained.

Next, this over-element 2 is set in a mold. That is, the set state of the mold and over-element 2 is as shown in FIG. 5, and the molds 8 and 9 form a synthetic resin injection part for forming the support part 7 of FIG. 3. The synthetic resin injection part (see FIG. 6) for molding the connecting part 5 and reinforcing part 6 that constitute the holding part of the present invention shown in FIG. It is formed by cores 10 and 11 having cores 11' at both ends (see FIG. 6). These cores 10, 11 are arranged inside the molds 8, 9, and are designed to sandwich the cross-sectional corrugated portion 2c of the over-element 2 from both sides of its top row and bottom row. . Therefore, core 1
0 and 11 have shapes corresponding to the shape of the cross-sectional corrugated portion 2c of the over-element 2. This core 10, 11
The left half of Fig. 5 shows how the over element 2 is held between the cores 10 and 11. The thickness is getting thinner. In addition, type 9
7 and 8 show the relationship between the lower core 11 and the assembly relationship of the over-element 2 to the mold 9.
As shown in the figure. In addition, in each of these figures, type 8,
12 is omitted.

On the other hand, the molds 12 and 13 form a synthetic resin injection part for molding the center part 4 shown in FIG.

In the above configuration, molten synthetic resin is injected into the synthetic resin injection part in the mold via runners 14 and 15, and molten synthetic resin is injected into the synthetic resin injection part via the runners (not shown). do. After pouring, by cooling and removing the mold, an overbody having the structure shown in FIG. 3 is obtained.

By the way, if the length of the outermost part of the over-element 2 protruding into the synthetic resin injection part is short, the outermost peripheral part of the over-element 2 will curl up due to the resin temperature and pressure during molding, and the support part 7 will not connect to the support part 7 after molding. There are cases where the outer circumferential portion does not connect well with the outer circumferential portion.

On the other hand, in this embodiment, as described above, the distance between the fold line R-R' and the end S-S' of the material 1, which is the starting material, is wide, so that the outermost part of the over-element 2 ends up being The lowest part of the cross-sectional corrugated portion 2c protrudes below the lowest part of the other parts. Therefore, the cross-sectional corrugated portion 2c at the outermost part of the over-element 2 is A.
Since the outermost part protrudes downward by the same size, the length of the outermost part that enters the injection part to form the support part 7 becomes longer, and therefore the position of the injection part is adjusted so that the resin flows as shown by the arrow in FIG. is set, the outermost part of the overlay element 2 is molded by the resin into the mold 9.
It will be pressed against the B side of Therefore,
It is possible to eliminate problems caused by the outermost part of the overlay element 2 being rolled up during molding.

Next, the structure of the air cleaner for an internal combustion engine including the above-mentioned overbody will be explained. Figures 10 and 11
In the figure, the overbody 16 is disposed in the space between the case 17 and the cap 18;
The ring-shaped support part 7 is a sealing gasket 1.
It is clamped and fixed between the case 17 and the cap 18 via 9 and 20.

The center portion 4 of the overbody 16 is supported on a support stay 21 provided within the case 17.

In this overbody 16, a part of the outer periphery of the support portion 7 has a circumferential positioning protrusion 7a (third,
(see Fig. 4) and a thick part 7b for vertical positioning (see Fig. 4) are integrally molded, and the case 17 has a recess 17a and a step 17b corresponding to the positioning parts 7a and 7b. Also cap 18
A protrusion 18a is integrally provided on the. In the figure, 22 is a metal collar, 23 is a rubber ring, and 24 is a clamp for tightening and fixing the case 17 and the cap 18.
a, a lever part 24b, and a tightening part 24c. In addition, 25 indicates the non-clean side, 26 indicates the clean side, and 27
indicates the suction tube.

It goes without saying that the present invention is not limited to the above-described embodiments, and that various modifications can be made as follows.

(1) As shown in Fig. 10, the cross-sectional corrugated portion 2c of the over-element 2 has a structure that is gently sloped between its innermost and outermost parts. By making the intervals between the folded lines the same, the cross-sectional corrugated portions 2c can be made to have the same height.

(2) As shown in Figure 12, the outermost part 2 of the over-element 2
a may be compressed in advance by means such as a hot press.

(3) In the above embodiment, the outermost part 2 of the over element 2
Although the lowermost end of the cross-sectional waveform part 2c of a is projected downward compared to the other parts, as shown in FIG. The lowermost ends of both the innermost cross-sectional corrugated portions 2c may protrude downward.

(4) In the above embodiment, the ring-shaped over-element 2 was constructed from a single piece of material 1, but it is also possible to construct the ring-like over-element by, for example, joining a number of pieces of material. Needless to say.

(4) The present invention can be applied to various liquid and gas filters in vehicles, and has a wide range of other uses.

〔Effect of the invention〕

As detailed above, according to the present invention, a resin center portion and a resin support portion are provided at the innermost and outermost portions of the numerous cross-sectional corrugated portions of the ring-shaped over-element, and the plurality of cross-sectional corrugated portions are provided. provided in the plurality of cross-sectional corrugated portions so as to bridge between the innermost portion and the outermost portion of the portion, and to be located vertically between adjacent cross-sectional corrugated portions of the plurality of cross-sectional corrugated portions; Since a plurality of radial resin holding parts having equal angular intervals are provided to hold the planar ring-shaped shape of the over-element, the plurality of radial resin-made holding parts having the above-mentioned structure can hold the over-element in the axial direction. The rigidity of the cross-sectional corrugated portion is improved evenly in the circumferential direction of the filter element, and as described above, the resin center portion and the resin support portion are formed integrally with this holding portion and are provided on the cross-sectional corrugated portion. In combination, the deflection of the cross-sectional corrugated portion in the over-element axial direction can be more effectively suppressed, and therefore the deformation of the cross-sectional corrugated portion can be suppressed more reliably.

In addition, since the load in the radial direction of the cross-sectional corrugated portion can be effectively suppressed by the plurality of radial resin holding portions, the spacing between adjacent cross-sectional corrugated portions can be reduced by the plurality of radial resin holding portions. The filtration element can be evenly and reliably held in the circumferential direction of the filter element, and therefore deformation and close contact of the corrugated cross-sectional portion due to loads from the radial direction of the corrugated cross-sectional portion can be more reliably suppressed.

Further, since the holding portions are linear and are provided in the cross-sectional corrugated portion at equal radial angular intervals, the proportion of the holding portions in the cross-sectional corrugated portion can be minimized, and an increase in fluid passage resistance can be avoided.

[Brief explanation of drawings]

Fig. 1 is a plan view of the material constituting the overbody of the present invention, Fig. 2 is a perspective view showing the material in Fig. 1 bent along the fold line, and Fig. 3 is a plan view showing the overbody of the present invention. , FIG. 4 is a cross-sectional view taken along line A-A in FIG. 3, FIG. 5 is a cross-sectional view corresponding to line B-B in FIG. 6, and FIG.
7 is a perspective view showing the relationship between the mold 9 and the core 11 in FIG. 5, and FIG. 8 is an overlapping view of FIG. 7. A partially cutaway perspective view showing the assembled state of the elements;
FIG. 9 is an enlarged cross-sectional view of the main part of FIG. 5, and FIG. 10 is a cross-sectional view taken along line C-C in FIG. 11 is a plan view of FIG. 10, and FIGS. 12 and 13 show other embodiments of the present invention. 1... Material, 2... Ring-shaped over-element, 4...
Center part, 5... Connection part, 7... Support part, 2a...
outermost part, 2b... innermost part, 2c... cross-sectional corrugated part.

Claims (1)

[Scope of Claims] 1. A ring-shaped filtration element comprising a large number of cross-sectional corrugated parts having a planar ring-like shape extending outward, and an innermost part of the plurality of cross-sectional corrugated parts of the ring-shaped filtration element. a resin support portion provided at the outermost part of the plurality of cross-sectional corrugated portions of the ring-shaped filtration element; a planar ring of the ring-shaped filtration element provided in the plurality of cross-sectional corrugated portions so as to bridge between the innermost portion and the outermost portion and to be located vertically between adjacent cross-sectional corrugated portions; a plurality of streak-like resin holding parts that hold a shape, the plurality of resin holding parts are arranged radially from the resin center part at equal angular intervals, and the center part, A fluid filter, characterized in that the supporting part and the holding part are integrally formed by resin molding. 2. An end portion of at least one of the innermost portion and the outermost portion of the plurality of cross-sectional corrugated portions of the ring-shaped filter element protrudes dimensionally longer than the end portion of the cross-sectional corrugated portion in the other portion. and
2. The fluid filter according to claim 1, wherein at least one of the support portion and the center portion is provided at the protruding end portion. 3. The fluid filter according to claim 2, wherein the downwardly protruding portion of the filtration element has a thinner wall thickness than other portions. 4 The ring-shaped filtration element has a plate-shaped filter medium that is short at one end and long at the other end, and is bent into a wave-shaped cross section between the one end and the other end, and the filter medium is bent with the one end on the inside and the other end on the outside. Claims 1 to 3 are characterized in that the ring is bent into a planar ring shape, the one end and the other end are butted together, and the abutting portion is joined by one of the holding portions. The fluid filter according to any one of Item 3.