JPH067765Y2 - Filter media sealing member for fluid filtration filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a filter for fluid filtration, particularly a filter for an automobile engine, together with a sealing member used for closing an end of a filter medium, for example, a cover of a housing or a filter medium. The present invention relates to an end plate that constitutes a filter element.

(Prior Art) As a conventional fluid filtering filter, as shown in FIG. 8, a housing 11 is made of synthetic resin, and a lower end of a filter medium 12 folded in a chrysanthemum shape is an end plate made of synthetic resin. While mounting the filter element 14 sealed with 13,
It is known that the upper end of the filter medium 12 is sealed by a synthetic resin cover 15 of the housing 11. An adhesive 16 such as an epoxy resin is used to join the upper and lower sides of the filter medium 12, the end plate 13 and the cover 15.

(Problems to be Solved by the Invention) In the above-mentioned conventional filter, since the adhesive is used for joining the filter medium 12 and the end plate 13 and the cover 15 which are the sealing members, it is necessary to dry and solidify the adhesive several times. It takes time. Therefore, it is difficult to shorten the filter assembly time, which is a bottleneck in improving productivity.

As a means for solving such a problem, it has been proposed to fuse the filter medium and the seal member by melting the synthetic resin seal member without using an adhesive when joining the filter medium 12 and the seal member. ing.

However, if an attempt is made to sufficiently melt the seal member while keeping the flat shape of the conventional seal member,
Not only the part necessary for joining melts, but also the peripheral part changes due to heating (Fig. 9). Then, the cover may not be attached to the housing depending on the degree of deformation. Further, if the heating is performed to such an extent that the peripheral portion 17 is not deformed, the joint portion will not be sufficiently melted, so that the filter medium cannot be embedded in the resin and complete joint cannot be performed.

(Means for Solving the Problems) In order to solve the above problems, the present invention proposes a seal member having a structure in which a joint with a filter medium is easily melted.

That is, the sealing member of the present invention is a filter for fluid filtration in which a nonwoven fabric or paper to be a filter medium is folded into a chrysanthemum shape and mounted in a housing having a fluid inlet and a fluid outlet. Is a plate-shaped sealing member that seals the upper end or the lower end of the filter, and includes an end plate that constitutes a filter element together with a filter medium and a cover that is attached to the housing.

In order to facilitate the melting, the sealing member is made of synthetic resin, and a plurality of narrow projected portions having a narrow convex shape are formed on the contact surface with the filter medium.

(Operation of the device) In this device, the planned fusion portion composed of narrow ridges is
The heat receiving area per volume is much larger than other areas. Therefore, it is extremely easy to melt, sufficiently melts before the peripheral portion is deformed, and complete bonding with the filter medium is possible.

An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment) FIG. 1 shows a housing 1 of a fuel filter for an internal combustion engine (fourth embodiment).
The cover 2 made of synthetic resin (for example, polypropylene) attached to the upper part of FIG.
An abutting portion of the central portion of the lower surface with the upper end of the filter medium 3 is an annular groove 4 which is recessed corresponding to the end surface shape of the filter medium 3. Then, a plurality of narrow ridges 5 are formed in the annular groove 4 at regular intervals in a vertical and horizontal grid pattern to form a planned melting portion.
The size of the convex shape is such that the height is equal to the recess depth of the annular groove 4 (about 2 to 3 mm) and the width is about 2 mm at the base.

According to the cover 2 shown in this embodiment, since the convex shape 5 has a large heat receiving area, the convex shape 5 is sufficiently melted to be in a liquid state before being heated and deformed except the portion to be melted. Then, when the upper end of the filter medium 3 is brought into contact with the liquid in a liquid state and then fixed by cooling, the filter medium 3 is attached to the cover 2 without using an adhesive and without deforming the peripheral portion of the cover. Can be fixed.

This heating puts the metal piece close to the convex shape 5,
Is generated by high-frequency induction, or the convex shape 5 is irradiated with far infrared rays.

Then, the resin in the planned molten portion, which has become liquid, stays in the annular groove 4 and does not flow out to the peripheral portion. Therefore, the upper end of the filter medium is embedded in the resin,
No seal failure will occur. This fixed state is as shown in FIG. That is, by inserting the end portion of the filter medium 3 into the melted convex shape 5 and pushing it into the remaining convex base portion, the melted convex shape flows and fills the gap between the cover 2 and the filter medium 3, Some of them have entered the filter medium.

Although various modes of the ridges are possible, the cross-shaped form has the greatest chance of contact between the ridges and the end of the filter medium 3 folded in a chrysanthemum shape, and the distance between the contact positions is large. Since they are even, the most reliable seal can be obtained.

Hereinafter, FIGS. 5 to 7 show other aspects of the ridge 5,
FIG. 5 shows a radial arrangement, FIG. 6 shows a concentric arrangement, and FIG. 7 shows a combination of a radial arrangement and a concentric arrangement.

In the above-mentioned embodiment, the embodiment of the cover is shown, but the same can be applied to the end plate 6. Then, only one of the cover and the end plate may have the structure of the present invention, the other may have a structure using an adhesive, or both may have the structure of the present invention.

(Effect of the Invention) According to the present invention, in the seal member for sealing the end of the filter medium, since the predetermined melting portion composed of the plurality of narrow ridges is formed at the contact portion with the filter medium, a relatively small amount of heat is required. It is possible to sufficiently melt the portion required for joining the filter media, and there is no risk of the peripheral portion being deformed. Further, since the resin at the joint portion can be sufficiently melted, the end portion of the filter medium is reliably sealed, and there is no fear of a sealing failure.

That is, according to the seal member of the present invention, without using an adhesive and without fear of deformation of the seal member,
The end of the filter medium can be reliably sealed with the molten resin.

[Brief description of drawings]

FIG. 1 is a sectional view of the embodiment of the invention, FIG. 2 is a bottom view of the same, FIG. 3 is a partially enlarged sectional view of a state in which a filter medium is joined, and FIG. 4 uses the cover of the embodiment of the invention. Sectional views of the assembled filter, FIGS. 5 to 7 are bottom views showing other arrangements of the ridges, FIG. 8 is a sectional view showing a conventional filter joined using an adhesive, and FIG. 9 is It is sectional drawing which shows the conventional deformed state. 1 ... Housing, 2 ... Cover, 3 ... Filter material, 4 ... Annular groove, 5 ... Convex strip, 6 ... End plate

Claims (1)

[Scope of utility model registration request] 1. A plate-shaped sealing member for sealing the upper end or the lower end of a filter material formed by folding a filter material made of non-woven fabric or paper into a chrysanthemum shape, and the sealing member is made of synthetic resin, and is in contact with the filter material. A filter medium sealing member in a filter for an internal combustion engine, characterized in that a predetermined melting portion composed of a plurality of narrow ridges is formed on the contact surface.