JPS643456Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Field of the Invention>> This invention relates to a filter body used in an oil filter or an air filter for an internal combustion engine.

《Prior art and its problems》 A filter body constructed by folding into a continuous zigzag shape with a W-shaped cross section can make the fluid passage surface the entire filtration surface, so a filter body folded into a chrysanthemum shape The filtration area can be increased compared to the filtration area, and it is particularly suitable as a filter body of a pass-through filter.

However, with this filter, the seals on the W-shaped end faces on both sides are complicated, and it is vulnerable to vertical pressure, so a sealing mechanism that serves both as a seal and reinforcement must be used, resulting in a complicated structure. Ta.

<<Purpose of the invention>> The object of this invention is to be able to completely and easily seal the end face of this type of W-shaped filter body, and to eliminate the need for special reinforcement.

《Structure of the device〉 In order to achieve the above purpose, this device has a cross section W
A circular hole penetrating vertically is formed in the center of the filtration member folded into a continuous shape, and each fold on the outer periphery of the circular hole is formed into a concentric arc, and each arc-shaped fold is continuous. It is characterized in that the W-shaped outer end surfaces of the linear folds are gathered together and closed.

<<Example>> FIG. 1 is a perspective view of a filter body according to this invention.

The filter body 1 in the figure is made by folding a filter member such as a filter paper into a continuous shape with a W-shaped cross section, and has a circular hole 2 in the center that passes through the W shape vertically.
Each pair of folds 3a, 3b, 3c, 3 on the outer periphery of
d is an arc concentric with the circular hole 2, and continuous linear folds 4a, 4b, 4c, 4d are gathered at both ends of each arc-shaped fold 3a, 3b, 3c, 3d. In addition, the line segment connecting the outermost arcuate folds 3d has a shape that is almost a perfect circle, and the ends of each of the folds 4a, 4b, 4c, and 4d are located on the line segment of the fold 3d as a whole. The filter body 1 is shaped into a substantially cylindrical shape.

Then, each fold 3d and 4a, 4b, 4
The W-shaped end face 5 constituted by c, is completely sealed by an adhesive coating 6 (only one side shown).

In order to form the filter body 1 having the above structure, folding is performed according to the development diagram, and then press work is performed, or by direct press work,
It has a W-shaped cross section and can be formed into a substantially cylindrical appearance.

The obtained molded body has high pressure resistance in the vertical direction.

Next, the structure of a filter using the filter body 1 is shown in FIG.

In the figure, 10 is a cylindrical case with an open top surface, 12 is a perforated plate that partitions the bottom of the case 10 into upper and lower parts, and 14 is a center tube protruding from the center of the perforated plate 12.

The circular hole 2 of the filter body 1 is fitted onto the outer periphery of the center tube 14. The outer diameter of the filter body 1 is approximately equal to the inner diameter of the case 10, and the filter body 1 defines the case 10 into upper and lower portions.

The center of the end plate 16 fits into the center tube 14, and the peripheral edge of the end plate 16 fits into the inner periphery of the case 10. Further, reference numeral 18 denotes an end plate 1 attached to the periphery of the upper surface of the case 10 by hemming.
6 is a fixing end plate, and 20 is a seal ring provided on the upper surface of the end plate 20. A plurality of communication holes 16a are opened around the end plate 16, and the fluid that has passed through the communication holes 16a as shown by the arrows passes through the entire surface of the filter body 1, passes through the perforated plate 12 and the center tube 14, and exits to the outside. Resupplied. Since the filter body 1 is constantly pressed against the porous plate 12 side by fluid pressure and has high pressure resistance, no special reinforcement or fixing structure is required.

In the embodiment, the present invention is applied to a center tube type filter, but it is also applicable to a center bolt type filter.

<<Effects of the invention>> As explained above, this invention has all the advantages of the W-shaped folding type filter body, while overcoming its drawbacks such as the complexity of the seal and the structural fragility.
A filter with high filtration efficiency and a simple structure can be obtained.

[Brief explanation of drawings]

Figure 1 is a perspective view of the filter body according to this invention, Figure 2 is a perspective view of the filter body according to this invention.
The figure is a side sectional view of a filter using the same filter body. 1... Filter body, 2... Circular hole, 3a, 3b, 3
c, 3d...Circular fold, 4a, 4b, 4c...
... linear fold, 5 ... W-shaped end surface, 6 ... adhesive coating, 10 ... case, 12 ... perforated plate, 14 ...
...Center tube, 16...End plate, 16a...
Communication hole, 18... End plate, 20... Seal ring.

Claims (1)

[Scope of utility model registration request] A circular hole penetrating vertically is formed in the center of the filtration member folded into a continuous W-shaped cross section, and each fold on the outer periphery of the circular hole is formed into a concentric arc, and each arc-shaped fold A filtration body for a filter, characterized in that the W-shaped outer end surfaces of continuous linear folds are closed together.