JP2564666Y2 - Filtration element - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter element formed by folding a sheet-like filter medium to form a large number of folds, and is particularly preferably used as an air filter element for an internal combustion engine of an automobile or the like.

[0002]

2. Description of the Related Art Conventionally, a single elongated sheet-like filter medium is alternately bent at a predetermined fold interval to form a saw-tooth cross-section, and one end of the fold direction of the filter medium is an inner peripheral side and the other end is an outer peripheral side. Spread and join both ends of the filter media in the longitudinal direction,
2. Description of the Related Art Cylindrical filtration elements formed so that the direction of the pleats are arranged radially are known. Such a filter element is housed in a case and used as an air filter element for an internal combustion engine of an automobile or the like.

[0003]

Recently, many electronic control technologies and the like have been introduced into the internal combustion engine of an automobile. For example, an air purifying element is installed in a case in which an air filtration element for an internal combustion engine is housed. 2. Description of the Related Art Various devices such as a temperature detection sensor for detecting a temperature of air in a container have been installed. In such a case, in the air purifier to which the conventional filtration element is mounted as described above, in order to secure a space for mounting various devices in the case accommodating the filtration element, the size of the case itself is increased, Alternatively, the shape of the case has to be changed and the design has to be redesigned, for example, by forming a bulging portion projecting outside the case. Since the installation space of the air purifier in the engine room is limited, increasing the size or changing the shape of the case may affect other parts, which is undesirable. The purpose of the present invention is that when mounting various devices in a case that accommodates a filtration element, there is no need to increase the size or shape of the case to secure the space for mounting the device, and to manufacture the filtration element itself. It is to provide a filtration element which is very easy.

[0004]

Means for Solving the Problems In order to solve the above problems, the present invention has been made. That is, the present invention is a filter element in which a sheet-shaped filter medium is alternately bent to form a large number of continuous pleats, and the direction of the pleats is radially arranged to form a cylindrical body. The folds having a bending width shorter than the fold width of the pleats forming the cylindrical body are partially partially flat with the pleats forming the cylindrical body.
Various types of machines formed in rows and having partially reduced pleat heights, wherein the cylindrical body has a flat fan shape and a predetermined height.
A notch space necessary for disposing the container is provided.

[0005] Further, the filter element is a filter element in which a sheet-like filter medium is alternately bent to form a large number of continuous pleats, and the direction of the pleats is radially arranged to form a cylindrical body. the height of the folds in the peripheral side, is formed lower than the height of the pleats at the outer side, the inner peripheral side <br/> of the cylindrical body, provided with a cutout space required to dispose the various devices Things. In these filter elements, by forming a sub-pleat between each basic fold connecting the inner peripheral end and the outer peripheral end, starting with a gap from the inner peripheral end and reaching the outer peripheral end. This is preferable because it is possible to prevent the pleats from adhering to each other at the inner peripheral portion and effectively secure a filtration area.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a first embodiment of a filtration element according to the present invention, and FIG.
FIG. 3 is a developed view of the filter medium of the first embodiment, FIG. 3 is a plan view of the second embodiment, FIG. 4 is a cross-sectional view taken along line AA of FIG. 3, and FIG. FIG. 6 is a development view of the filter medium of the third embodiment, FIG. 6 is a development view of the filter medium of the third embodiment, and FIG. 7 is a development view of the filter medium of the third embodiment. FIG.

In the filter element body 11 of the first embodiment shown in FIG. 1, one sheet-like filter medium 1 shown in FIG. 2 is alternately bent in accordance with the folds of the folds, and one end of the filter medium in the fold direction is placed inside. By expanding the peripheral side and the other end side to the outer peripheral side and joining both ends in the longitudinal direction of the filter medium of the filter medium, by forming so that the direction of the fold is radially arranged, the entire cylindrical body It has been formed. 1 and 2
As is clear from FIG.
Is formed, and the basic fold 4 is formed.
Between the inner peripheral end 2 and the outer peripheral end 3
Are formed. That is, the basic folds 4 and the sub-folds 5 are formed alternately and continuously in the circumferential direction, and the sub-folds 5 are formed from the inner circumference side to the outer circumference side with a slight gap. The basic folds 4 on the inner peripheral side are in contact with each other, do not adhere to each other, and the filtering function is efficiently performed. In the portion A shown in FIG. 2, the bending width l ₁ of each of the basic folds 4 a and the sub folds 5 a is formed shorter than that of the other basic folds 4 and the sub folds 5. As shown in the figure, the height of the folds of the basic folds 4a and the sub folds 5a is formed to be partially lower than the heights of the other folds. It has become. Since such a notch space exists, various devices can be arranged in the notch space without changing the overall shape of the case accommodating the filtration element body 1. In this embodiment, the cutout space is provided on the upper surface side of the filtration element main body, but the lower surface side (filtration side)
Needless to say, it may be provided at The inner tube 12 is provided at the center, and the peripheral flange 13 is provided at the outer periphery so as to be able to engage with the case when housed in the case. When the gaps and the like at the inner and outer peripheral end portions (shaded portions in FIG. 1) are filled with a synthetic resin material, they can be formed integrally with the filter material at the same time.

The filter element body 21 of the second embodiment shown in FIGS. 3 and 4 is formed by alternately bending one sheet-like filter medium 1 shown in FIG. 5 in accordance with the folds of the folds. It is. A basic fold 4 connecting the inner peripheral end 2 and the outer peripheral end 3 is formed in the filter medium 1. The basic fold 4 starts with a gap from the inner peripheral end 2 and starts at the outer peripheral end 3. Are formed. That is,
Basic folds 4 and sub-folds 5 are formed alternately and continuously in the circumferential direction, and the sub-folds 5 are formed from the inner circumference to the outer circumference with a slight gap. This is the same as in the first embodiment. In the second embodiment, as shown in FIG. 5, the bending width l ₂ of each of the basic folds 4 and the sub folds 5 is constant, but the basic folds 5 on the inner circumferential side from the portion where the sub folds 5 start. Since the width l ₃ of the fold is cut so as to be shorter than the fold width l ₂ of the fold on the outer peripheral side from the portion where the sub-fold 5 starts, as shown in FIG. wrinkle height h ₃ of the basic folds 4 in the outer peripheral side is formed lower than the wrinkle height h ₂ of the basic folds 4 at the outer peripheral side of the portion where the sub-fold 5 starts, the inner circumference in the filter element body 21 of the cylinder A notch space portion having a concave cross section is formed around the portion. In this embodiment, the cutout space is provided on the lower surface side of the filtration element body, but may be provided on the upper surface side. Further, the notch space portion can be partially provided in the circumferential direction, such as a sector shape, instead of the entire circumferential direction. Normally, the voids at the inner and outer peripheral ends of the basic folds and the sub folds can be formed integrally with the filter material together with the inner cylinder 12 and the peripheral flange 13 at the center portion using a synthetic resin material.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and for example, the first embodiment and the second embodiment may be combined. it can. Further, in the above-described embodiment, the one provided with the basic fold 4 and the sub fold 5 has been described.
The notch space can also be formed by bending the filter medium 1 of the developed view shown in FIG. 7 in accordance with the folding line, and various other changes can be made within the scope of the present invention. .

[0010]

According to the present invention, in order to secure a space for mounting various devices in the case accommodating the filtering element, the size of the case itself is increased or a bulging portion protruding outward from the case is provided. By forming, etc., it is not necessary to change the shape of the case and redesign it, and according to the folding line, a filter medium of a predetermined shape with a predetermined folding line is provided.
By forming by bending, it is possible to provide a notch space necessary for mounting a device such as a sensor. In addition, the notch space required for mounting such a device can be formed partially and in a minimum space with respect to the filtration element that forms a cylindrical body, so that a reduction in filtration area is minimized. It can be suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of a filtration element according to the present invention.

FIG. 2 is a development view of the filter medium of the first embodiment, in which the folds of the pleats are shown.

FIG. 3 is a plan view of a second embodiment.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a development view of the filter medium of the second embodiment, in which the folds of the pleats are shown.

FIG. 6 is a development view of the filter medium of the third embodiment, in which the folds of the pleats are shown.

FIG. 7 is a development view of the filter medium of the fourth embodiment, in which the folds of the pleats are shown.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filter medium 2 Inner peripheral end 3 Outer peripheral end 4 Basic fold 5 Secondary fold 11, 21 Filtration element main body

Claims (3)

(57) [Scope of request for utility model registration] 1. A filter element in which a sheet-like filter medium is alternately bent to form a large number of continuous pleats, and the pleats are arranged in a radial direction so that the overall shape is a cylindrical body. The folds having a bending width shorter than the bending width of the folds forming the cylindrical body are partially formed in the cylindrical body.
And parallel with the Suhida the height of pleat partially low form, on the cylindrical body, having a flat-fan and a predetermined height
A filter element having a notch space required for disposing various devices . 2. A filter element in which a sheet-like filter medium is alternately bent to form a large number of continuous pleats, and the direction of the pleats is radially arranged to form a cylindrical body as a whole. the height of the folds in the peripheral side, is formed lower than the height of the pleats at the outer side, the inner peripheral side of the cylindrical body,
A filtration element having a notch space required for disposing various devices . 3. A sub-pleat formed between each of the basic pleats connecting the inner peripheral end and the outer peripheral end with a gap from the inner peripheral end and extending to the outer peripheral end. Item 3. The filtration element according to Item 1 or 2.