JP2517262B2 - Ring-shaped filter element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an annular cap-shaped filter element made of pleated material.

(Prior Art) Conventionally, an excess body obtained by folding a sheet-shaped material is used as an excess element, but it is known that the folds are expanded in a fan shape 360 ° as a ring-shaped plate-shaped excess body. For example, the one disclosed in Japanese Utility Model Publication No. 57-25708 is shown in FIG. The overbody 41 in FIG. 8 is a sheet-shaped material in which mountain lines 45 and valley lines 46 are boundaries of long rectangular oversurfaces 44, and mountain lines and valley lines are alternately provided in parallel to the width direction of the strip. Formed from.

(Problems to be Solved by the Invention) In the above-mentioned 360 ° fan-shaped ring-shaped overbody 41, the mountain lines 45 and the valley lines 46 are radial, and the adjacent outer faces 44 are closer to each other toward the ring-shaped outer diameter 43. The intervals between are large. A space above the gap required for the fluid flow path is a wasteful space,
Has a large volume. However, at present, there is a demand for reducing the fluid resistance and prolonging the service life by holding the largest possible over-area in the same volume, or for downsizing without reducing the over-area.

(Means for Solving the Problems) The mountain lines and the valley lines are alternately arranged radially and inclined, a filtering surface is formed between the mountain lines and the valley lines, and each mountain line and the valley lines. And the filtering surface are bent in a zigzag shape,
Further, these bending angles are sharpened as they go from the inner diameter portion toward the outer diameter portion, the packings provided on the side surfaces of the inner diameter portion and the outer diameter portion of the filter body, and the lower surface of the filter body. And a support body having radial and circumferential columns, and an annular cap-shaped filtration element.

(Operation) This filter element is used by allowing the fluid to flow in the direction of the upper and lower surfaces where zigzag peak lines and valley lines appear, and sealing the inner and outer peripheral side surfaces.

Since the mountain line and the valley line are zigzag-shaped, the space between the outer surfaces near the outer diameter is narrowed to reduce the wasted space, and the outer diameter is smaller than that of the conventional equal excess area.
Also, a larger over-area is accommodated within the same outer diameter.
Furthermore, since the zigzag bending angle of the mountain line and the valley line is made sharper toward the outer diameter of the overbody, it is possible to prevent the distance between adjacent oversurfaces from increasing to the outer diameter. Can be made smaller. Further, by maintaining a substantially uniform superficial distance closer to the inner diameter, the fluid resistance is made uniform over the entire superficial surface, local clogging is prevented, and the life of the filter body is extended.

Moreover, because this filter body has a sloped shape,
When it is housed in an air cleaner casing or the like, it can be inclined according to the ratio of the height to the diameter of the casing, so that it can have a shape advantageous for space utilization.

Further, the flexibility of the filter body having the folds in the radial direction and the circumferential direction is supported by the columns in the circumferential direction and the radial direction, and the self-shape retention is ensured. .

(Example) FIG. 1 shows a filter body 1 as a pre-stage of the filter body according to the present invention. The filter body 1 has an inner diameter portion 2 and an outer diameter portion 3 as a whole.
It forms an annular body having a superficial surface 4 between them. The mountain line 5 on the upper surface side and the valley line 6 on the lower surface side are alternately arranged in a shape in which line segments 5a, 5b, 5c ..., 6a, 6b, 6c ... of equal length are bent and connected in zigzag. Are arranged in a radial pattern, and the oversurface 4 is formed between the mountain line 5 and the valley line 6. Each side 4
Is a unit surface 4 surrounded by line segments 5a, 6a, 5b, 6b, 5c, 6c ... and a fold line 7 connecting both ends of each line segment
A, 4b, 4c ... are connected in a zigzag shape.

The overbody 1 as described above is formed from the band-shaped paper 20 shown in FIG. One side edge 21 of the strip 20 is the inner diameter portion 2 of the excess body 1 and the other side edge 22 is the outer diameter portion 3. The ends 23, 24 are superposed and joined. The zigzag line in the 21-22 direction in FIG. 2 is a crease mark which becomes a mountain line 5 and a valley line 6. 23-24
The straight line in the direction is a crease mark that becomes the crease line 7. In both cases, the solid line is a fold mark that is convex upward, and the chain line is a concave fold mark that is upward.

Next, the bending angle a as shown in FIG. The filter body 11 has a zigzag line segment 15a, 15b, 15c .. . The same applies to the valley line 16.

Further, like the overbody 21 shown by the cut surface along the valley line in FIG. 4, the mountain line 25 and the valley line 26 are connected to each other, and the upper surface and the lower surface are conically inclined to form an annular shade. And the filter body 21. In the filter body 21 of FIG. 4, 24a, 2
4b, 24c ... are unit faces, and 27 is a crease line.

In the excess body as described above, the inner diameter portion 22 and the outer diameter portion 23 are closed by the seal packing.

FIG. 5 shows an example of the excess element of the present invention. The excess element 31 is a radial or oblique radial column 32a.
And a support 32 whose upper surface is a conical surface and which holds the excess body 21. Innermost column
A plurality of claws 32c, 32d are provided on the outer peripheral support 32a and the outermost support 32a, respectively.
Is projected, and the inner diameter portion 22 and the outer diameter portion 23 of the excess body 21 are claws 32.
It is locked to c and 32d. A closing plate 33 that covers a circular space surrounded by the innermost peripheral columns 32a of the support 32 is integrally provided, and a bolt hole 33a is formed in the center thereof. The inner diameter portion 22 of the excess body 21 is sealed by a packing 34 made of an elastic material, and the claw 32c is embedded in the packing 34. The outer diameter portion 23 of the overbody 21 is sealed by a packing 35 made of an elastic material, and the packing 35 is a claw.
32d is embedded inside, and an annular tongue 35a is projected on the outer periphery. The annular tongue piece 35a separates the clean side and the non-clean side of the fluid when assembled in the casing. FIG. 6 shows a portion of another excess element. (A) is the shape of the packing 34 'of the inner diameter portion 22, and 33' is the closing plate of the support.
(B) shows the shape of the packing 35 'of the outer diameter portion 23.

The air cleaner in which the excess element 31 is mounted in FIG.
36 is shown. An excess element 31 is placed on a dish-shaped body 37 having an air outlet 37a, a ring-shaped tongue 35a is sandwiched between the periphery of the body 37 and a cover 38 is mounted, and a center bolt 39 is tightened. 38a is an air inlet.

(Effect of the Invention) Since the radial body of the present invention has the radial radial surface formed in a zigzag shape as described above, it can accommodate a wider excessive area with the same volume as the conventional one. Therefore, there is an effect of reducing the pressure loss of the fluid passing therethrough and extending the life of the excess element. Alternatively, it is possible to reduce the size of the excess element without reducing the excess area as compared with the conventional case. This effect is more remarkable because the angle between the mountain line, the valley line, and the filtering surface is made sharper toward the outer diameter to prevent the spacing between the filtering surfaces closer to the outer diameter from increasing. Becomes

Further, since the filter body is supported by the support columns in the radial direction and the circumferential direction, since the fold line is provided in the radial direction and the circumferential direction, the filter body, which is easily bent, can be used as a reliable filter element that maintains its own shape. Further, when the air cleaner casing is housed in an air cleaner casing or the like due to the inclination, the inclination can be made according to the height and diameter of the casing, and the space can be effectively used to form a more compact air cleaner or the like.

[Brief description of drawings]

FIG. 1 is a perspective view showing a filter body without a cap-shaped inclination as a pre-stage of the filter body in the present invention, FIG. 2 is a development view of a filter medium, and FIG. 3 is a pile of the filter body of FIG. Fig. 4 is a cross-sectional view of the filter body according to the present invention, Fig. 5 is a cross-sectional view showing an embodiment of the present invention, and Fig. 6 (a) ) (B) is a partial cross section showing a portion different from that of FIG. 5 in another embodiment,
FIG. 7 is a view showing an example of an air cleaner using the filter element of the present invention, and FIG. 8 is a view of a conventional filter body. Inner diameter 2,12,22, outer diameter 3,13,23 4,24 ... Oversurface 5,15,25 ... Mountain line 6,16,26 .. Valley line

Claims (1)

(57) [Claims] 1. A mountain line and a valley line are alternately arranged in a radial pattern with an inclination, a filtering surface is formed between the mountain line and the valley line, and each mountain line, the valley line and the filtering surface are formed. It is bent in a zigzag shape, and the bending angle of these is made sharper as the bending angle goes from the inner diameter part toward the outer diameter part, and the filter body is formed into a sharp shape. An annular cap-shaped filter element comprising a provided packing and a support disposed on a lower surface of the filter, the support having radial and circumferential columns.