JPH0728892Y2 - Fold filter element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a pleated filter element, more specifically, a gas for various uses such as automobiles, in which a single filter paper is folded to form a large number of pleats. The present invention relates to a filter element for liquid.

[Conventional technology]

As a filter paper type filter element conventionally used for an oil filter for an internal combustion engine, an air filter and the like, as shown in FIG. 3, one filter paper (1) (sheet-shaped filter material) is sequentially arranged in the longitudinal direction. It is known that the elements are alternately folded back to form a wavy or zigzag element body as a whole.

[Problems to be solved by the device]

The above-mentioned conventional filter element is easy to manufacture,
It is not always sufficient in terms of securing the pressure resistance against the fluid and the filtration area.

An object of the present invention is to provide a filter element which has an improved filtration area and is excellent in shape retention and hardly deformed by improving the pleated structure of the conventional filter element.

[Means for Solving the Problems]

The present inventor has completed the present invention as a result of earnest research on the pleated structure of the filter element made of a piece of filter paper.

That is, according to the present invention, a large number of pleated folds (2) are formed in parallel in the longitudinal direction of a piece of filter paper (1) at regular intervals.
And forming a valley fold forming fold (3) which intersects on the mountain fold forming fold (2) to form a rhombus and extends obliquely,
These filter folds (2, 3) are used as folds to bend the filter paper to form folds (2a) and folds (3a), respectively.
Folds and folds for forming folds (4) that form a lozenge between the intersections of the folds for forming valley folds (3) in the lateral direction.
And a folding fold forming fold (5) is formed in the center of the folding fold forming fold (4), and the folding fold forming fold (4) is alternately folded back in the longitudinal direction with the fold forming fold (4) as a fold. Folded streaks (5) for forming the folded folds (4a) and forming the fold
A fold-fold filter element in which a folded fold portion (5a) is formed by using as a fold, and has a wavy fold structure as a whole, which solves the above problems.

[Action]

The filter element according to the present invention has the above-mentioned structure, and the valley folds (3a) are formed obliquely between the ridges (2a) extending in the longitudinal direction of the filter paper, and the folded corner portions are formed in the longitudinal direction. Since (4a) is formed in a rhombus shape, it is structurally resistant to deformation and has excellent shape retention, and since many folds are formed on one filter paper, the filtration area can be increased. .

〔Example〕

Hereinafter, a specific embodiment of the filter element according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a state where a part of a filter element of an embodiment of the present invention is assembled, and FIG. 2 is a development view of a filter paper showing a fold line of a fold. In FIG. 2, the solid line portion represents a mountain fold crease, and the broken line portion represents a valley fold crease.

In the longitudinal direction of one sheet of filter paper 1 (filter paper, non-woven fabric or other sheet-like filter paper), a large number of pleating folds 2 are formed in parallel at regular intervals, and the folds for fold forming 2 cross each other. Then, a trough-shaped fold line 3 for forming a valley fold is formed in an oblique direction. The folds 2 for forming folds are folded in a mountain shape, the folds 3 for forming valley folds are folded in a valley shape, and are bent to form a mountain fold 2a and a valley fold, respectively.
3a is formed.

Between the intersecting points in the lateral direction of the valley fold forming folds 3 (intersection point: also the intersection of the mountain fold forming folds 2 and the valley fold forming folds), there is a diamond-shaped folded fold forming fold 4. Are formed, and the folded corners 4a are formed by alternately folding back the folded folds 4 for forming folded folds in the longitudinal direction.
As a whole, a wavy (zigzag) fold-fold structure is formed. In addition, a folding fold forming fold 5 is formed at the center of the folded fold forming fold 4 (a portion continuous with the mountain fold forming fold 2). The folded folds 5a are formed by being folded into.

It is needless to say that the size, pleating density, number of pleats, etc., of the filter element configured as described above can be appropriately set according to the purpose and application of the filter to which it is applied. Further, it is possible to bond the ends of the fold-folded filter element in the longitudinal direction to each other to form a cylindrical shape as a whole, and the filter element can be housed not only in a rectangular case but also in a cylindrical case. Of.

[Effect of device]

The filter element according to the present invention is made of a piece of filter paper, and is provided with a fold-fold line to form a large number of folds only by bending, so that it is of course easy to manufacture. The filtration area can be greatly increased as compared with the conventional one, and the pleated structure has an excellent shape-retaining property, so that pressure resistance against fluid is high and deformation is less likely to occur. .

[Brief description of drawings]

FIG. 1 is a perspective view showing a partially assembled state of a filter element according to an embodiment of the present invention, FIG. 2 is a developed view of a filter paper showing a fold line, and FIG. 3 is a conventional filter element. It is a perspective view. 1 ... filter paper, 2 ... folds for forming mountain folds, 2a ... yama folds,
3 ... Valley fold forming folds, 3a ... Valley folds 4 ... Fold fold forming folds, 4a ...... Folding corners, 5 ... Fold fold forming folds, 5a ... Fold folds

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location F02M 37/22 J

Claims (1)

[Scope of utility model registration request] 1. A large number of pleated folds (2) are formed in parallel at a constant interval in the longitudinal direction of a piece of filter paper (1), and are crossed on the pleated folds (2). Forming a rhombus and extending diagonally to form a valley fold forming fold (3), and bending the filter paper using these folds and valley fold forming folds (2, 3) as folds, respectively. 2a) and valley folds (3a) are formed, and folds for fold formation (4) and folds for fold formation that form a lozenge between the intersections of valley fold formation folds (3) in the lateral direction A fold for forming folds (5) is formed at the center of (4), and the folds for forming folds (4) are used as folds to alternately fold back in the longitudinal direction to form fold corners (4a). The folds (5a) for forming the folding folds are used as folds to form the folding folds (5a), and the folds have a wavy fold structure as a whole. Filter element.