JPH0116492Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet-like material, and relates to a filter element in which a single sheet-like material forms a large number of channels and has an increased overarea.

2. Description of the Related Art Conventionally, filter elements are known in which a sheet-like material is folded into pleats in multiple layers.

However, with such conventional products that are simply folded to form pleats, increasing the number of pleats causes adjacent pleats to become extremely close to each other and even closer together due to an increase in area, making it difficult to use. This has the disadvantage that the fluid passage is obstructed and the overefficiency decreases.

The present invention eliminates the drawbacks of conventional filter elements of this type, and proposes a filter element that significantly increases the excess area, is smaller in size, can be efficiently filtered without impairing fluid flow, and can be manufactured at a low cost. It is something to do.

In other words, the present invention folds a sheet material at equal intervals to form folds consisting of many peaks and valleys.
This is further bent in a meandering manner to a certain length along the longitudinal direction of the pleats, and the opposing ridgelines of each bent pleat are held in contact with each other, thereby forming a rhombic or square cross section surrounded by the pleats. This is a filter element formed by forming a large number of spaces.

Hereinafter, embodiments will be specifically explained with reference to the drawings. FIG. 1 is a perspective view showing a state in which a sheet material 1 is folded in parallel to form a large number of peaks 2 and troughs 3. (Conventional products are rolled into a cylindrical shape or used in a plate-like state.) Figure 2 shows the back pleats (crests 2, valleys 3) formed in this way along the longitudinal direction. Although the material of the present invention is formed by sequentially bending and folding the material into a certain length in a meandering manner, it is a perspective view illustrating the folding mode with the ridge lines 2 and 2 of the bent portions slightly separated. Therefore, in the final shape, 2 and 2 are in contact as shown by the arrows. FIG. 3 is a developed view of the same, in which solid line portions 2 and 3a are ridge lines that form peaks when folded as shown in FIG. 2, and broken line portions 3 and 2a are lines that form troughs.

FIG. 4 is a perspective view of the filter element of the present invention, in which the opposing peaks 2 and 2 in FIG. Spaces a and b each having a rhombic or square cross section are formed. In FIG. 4, the upper end of space b is closed by a bending part, and space 2a
is the valley line. On the other hand, the lower end of space a is the fourth
Although not shown in the figure, as can be seen from FIG. 2, it is similarly closed and 3a protrudes like a mountain. In this way, the present invention has a space a with an open upper end and a closed lower end, and a space b with a closed upper end and an open lower end.
are arranged alternately.

Note that if the contact portions of each ridge line are fixed by welding, bonding with an adhesive, or point bonding, the above-mentioned shape can be maintained even more reliably.

With such a configuration, when fluid flows into the space a, it flows out into the space b through the wall surfaces of each material and is passed through the surrounding surfaces.

The present invention has an increased overarea and can be made smaller, and even when the number of pleats is increased, a space is formed and maintained between the materials. is achieved and can be provided at a low price, so it is extremely effective as a fluid filter element.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a pleated material sheet, Fig. 2 is a perspective view showing the material sheet of Fig. 1 bent in a meandering shape, and Fig. 3 is a developed view showing the folds of Fig. 2. FIG. 4 is a perspective view showing an example of the filter element of the present invention. DESCRIPTION OF SYMBOLS 1... Sheet material, 2... Mountain part, 3... Valley part, a, b... Space, 2a... Valley part of closed part, 3
a... Mountain part of the blocked part.

Claims (1)

[Claims for Utility Model Registration] 1. Folding a sheet-like material alternately at equal intervals to form pleats consisting of a large number of peaks and troughs, which are further folded to a constant length along the longitudinal direction of the pleats. A filter element which is bent in a meandering manner, and the opposing ridge lines of each bent pleat are held in contact with each other to form a large number of spaces having a rhombic or square cross section surrounded by the folds. 2. The filter element according to claim 1, wherein the contacting ridge lines are joined or point joined to each other.