JPH0437606Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a filter element in which a large number of filter papers are laminated and a fluid to be filtered is passed in the plane direction of the laminated filter papers.

《Prior Art》 Conventionally, oil filters used for filtering lubricating oil in automobiles, etc., have a type that uses a filter element in which a large number of filter papers are laminated. It is shown.

The filter paper laminated filter element of Utility Model Publication No. 1983-20411 is made by alternately laminating starfish-shaped filter paper and disk-shaped filter paper each having a plurality of radially formed protrusions.
Some of the oil passes through the protrusion of the starfish-shaped filter paper from the outside inward and is collected in the center of the filter paper through radially formed slits or striations in the center of the protrusion. After being drained, it is discharged through a hole formed in the center.

Further, for example, Japanese Utility Model Publication No. 60-34330 discloses a groove formed by press molding or the like as a passage formed in the center of the protrusion.

<<Problems to be solved by the invention>> However, in such a conventional filter element, if the passage in the center of the protrusion is a slit, as shown in FIG. The protruding part 1 of the starfish-shaped filter paper
a A large amount of hydraulic pressure acts on both sides, crushing the slit 2. As a result, the amount of oil that is discharged through the slit 2 as a passage is significantly reduced. In addition, if the passage in the center of the protrusion is a groove formed by press molding, etc., the groove swells while the filter paper is immersed in oil for a long time, and the cross-sectional area of the groove becomes smaller, causing the amount of oil passing through this passage. There was a problem in that the oil filtration function of both of them decreased, and as a result, the oil filtration function was significantly decreased.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a paper laminated filter element that allows oil to pass through sufficiently even when the protruding portion of the starfish-shaped filter paper is clogged.

<<Means and effects for solving the problem>> In order to achieve the above object, the filter paper laminated filter element of the present invention includes a starfish-shaped filter paper in which a plurality of protrusions are formed radially, and a starfish-shaped filter paper in which a plurality of protrusions are formed in a radial manner. In a filter element constituted by alternately stacking disc-shaped filter papers formed to have approximately the same diameter as the tip diameter of the protruding part, the correspondence of the disc-shaped filter paper in which the protruding parts of the starfish-shaped filter paper are overlapped. It is constructed by forming a radially extending cutout feature within the section.

<<Operation>> With the above configuration, in the filter paper laminated filter element of the present invention, the fluid that has entered the protrusion of the starfish-shaped filter paper is introduced into the notch formed in the filter paper disk, and It will easily flow outward through the flow.

<<Example>> Hereinafter, an example of the present invention will be described in detail with reference to the drawings, taking an oil filter as an example as in the prior art.

That is, FIG. 1 shows a starfish-shaped filter paper 10, and FIG. 2 shows a disc-shaped filter paper 12. The starfish-shaped filter paper 10 has a plurality of protrusions (six in this example) arranged radially at equal intervals. A regular hexagonal through hole 10b is formed in the central portion of the protruding portion.

On the other hand, the disc-shaped filter paper 12 is formed to have the same diameter as the tip end diameter of the protruding part 10a of the starfish-shaped filter paper 10, and has the same position and the same position as the through hole 10b formed in the starfish-shaped filter paper 10 in the center part. A radial through hole 12a is formed.

A large number of the starfish-shaped filter papers 10 and disc-shaped filter papers 12 are stacked alternately, and each of the through-holes 10
b and 12a communicate with each other vertically to form an oil discharge path.

Here, in the present invention, the through holes 12 are provided in a corresponding portion (indicated by a two-dot chain line in the figure) of the disc-shaped filter paper 12 where the protrusion 10a of the starfish-shaped filter paper 10 is superposed.
Notch structure 14 extending continuously in the radial direction from a
are formed in a number corresponding to the protrusions 10a of the starfish-shaped filter paper 10.

Therefore, when the starfish-shaped filter paper 10 and the disc-shaped filter paper 12 are respectively polymerized, the upper and lower openings of the notch structure 14 are closed by the adjacent protrusions 10a, as shown in FIG. The cross section is configured.

The filter paper laminated type filter element having the above configuration is housed in a filter case (not shown), and the dirty oil pumped into the filter case is transferred from the outer periphery of the filter paper 10, 12 to each filter paper 10, 12.
Clean oil is introduced into the through-holes 10b, 12a through the through-holes 10b, 12a, and the clean oil from which dust has been removed during the passage is discharged from the through-holes 10b, 12a to the outside of the oil filter.

Incidentally, as shown in FIG. 3, the oil passing through the protrusion 10a flows into the notch structure 14 from within the protrusion 10a, and the oil passes through the notch structure 14.
It passes through the inside and is easily discharged into the through hole 12a. Further, since the notch structure 14 is formed in the disc-shaped filter paper 12, the notch structure 14 will not be crushed even if oil pressure is applied to both sides of the protrusion 10a, and the filtering function can be maintained sufficiently. be able to.

<<Effects of the invention>> As explained above, in the filter paper laminated type filter element of the present invention, the notch structure is formed in the corresponding portion of the disc-shaped filter paper where the protruding part of the starfish-shaped filter paper is superposed. The fluid that has passed through the protrusion flows into the notch structure and is easily discharged through the notch structure, and the notch structure is not crushed even if fluid pressure acts on the protrusion. This has the excellent effect of increasing the amount of filtration fluid discharged, that is, greatly improving the filtration function.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a starfish-shaped filter paper used in the paper laminated filter element of the present invention, FIG. FIG. 4 is an enlarged sectional view of the main part of the filter paper laminated type filter element of the invention, and FIG. 4 is an enlarged sectional view of the main part of the conventional filter paper laminated type filter element. 10...Starfish-shaped filter paper, 10a...Protrusion, 1
2...Disc-shaped filter paper, 14...Notch structure.

Claims (1)

[Scope of utility model registration request] A filter element constructed by alternately stacking starfish-shaped filter paper in which a plurality of protrusions are formed in a radial manner, and disc-shaped filter paper formed to have approximately the same diameter as the tip end diameter of the protrusion of the starfish-shaped filter paper. In,
A filter paper laminated type filter element, characterized in that a cutout structure extending in the radial direction is formed in a corresponding portion of the disk-shaped filter paper on which the protruding portion of the starfish-shaped filter paper is superposed.