JPS6260928B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filter element, more specifically,
To provide a filter element which allows a filter element to be replaced as a single unit, is easy to handle, and has excellent sealing performance at both upper and lower ends.

The conventional overtube using a paper filter is
As shown in the figure, a large number of pleats 7 are created by simply repeatedly folding the material paper to form a cylindrical body with an approximately chrysanthemum-shaped cross section, and its upper and lower end surfaces are formed by donut-shaped end plates 8,
8' is integrally bonded and closed in an annular shape to form a cylindrical shape.

In such a conventional device, if the overtube becomes clogged, the overtube and both end plates 8, 8' must be replaced as a unit. End plate 8, 8'
is a metal molded product with a specific structure in the shape of a doughnut, and it is extremely uneconomical to dispose of it together with the paper due to high manufacturing and material costs. Therefore, we decided to replace the overtube as a single unit by tightening the donut-shaped end plate in the longitudinal direction instead of gluing it together, or by attaching it to the end of the paper from the inside and outside to match the chrysanthemum-like pattern of the paper. However, the sealing effect would be incomplete if only the overtube and both end plates were tightened, and precise overlays would not be suitable.Also, the method of pinching from the inside and outside according to the chrysanthemum-like pattern was not suitable for paper. They have the drawback of requiring a great deal of effort to replace, and each method requires a separate member with a special structure, making them unsatisfactory.

The present invention has a simple structure that allows the overtube to be replaced as a single unit, and the sealing performance at both ends of the overtube is reliable, making it easy to replace in a short time, and it can be provided economically and at low cost. It is also extremely beneficial in terms of resource saving.

That is, in the present invention, the upper and lower ends of the vertical folds forming the overtube are usually folded inward at an angle of 45 degrees to form a V.
A short cylindrical body is formed along the inner periphery of the folded part, and the zigzag-shaped folded part is thereby sealed from the inside to form an overtube, which is inserted into the outside of the perforated cylinder. The short cylindrical body portion is tightened and fixed to the porous cylinder.
A suitable band or the like may be used for tightening and fixing, and if the short cylindrical body itself is made of an elastic material, there is no need to use a band.

An example of a specific embodiment will be described below with reference to the drawings. FIG. 2 is a perspective view of the filter element of the present invention, FIG. 2 is a longitudinal sectional side view, and FIG. 3 is a partially exploded view of the overtube.

1, for example, folds paper at predetermined intervals to form a large number of pleats 1a, and folds both the upper and lower ends of each pleat at an angle of usually 45 degrees to form a V-shaped folded portion 1b,
1b' is formed into a cylindrical tube.
2 and 2' are short cylindrical bodies that are fitted inside along the folded portions, and the zigzag edge portions thereof are adhered to seal the upper and lower ends of the pleats 1a.

As is clear from FIG. 3, the over-tube 1 is fitted onto the outside of the perforated cylinder 4, and is fastened by bands 6, 6' at its upper and lower ends. 5 and 5' are band stops.

Note that 3 and 3' indicate ring-shaped reinforcing end plates provided at both upper and lower ends of the porous cylinder 4.

Since the filter element of the present invention is configured as described above, the overresistance increases and the overtube 1
If the filter becomes clogged and sufficient overflow cannot be obtained, it can be easily removed by stopping the overflow, removing the stoppers 5, 5', and then pulling out the overflow cylinder 1 from the perforated cylinder 4. All you have to do is replace it with a new overtube and fit it again in the same way as above. In this way, not only is it easy to replace, but also the overtube 1 is attached to the folding part 1.
By forming b and 1b' and adhering the short cylinders 2 and 2' inside thereof, the sealing performance at both ends of the pleat 1a is simple and reliable, and the structure is simple and does not require any special members. Because it is available, it can be provided at a low price, and it is extremely economical because only the overtube needs to be replaced.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view of a conventional filter element, Fig. 2 is a perspective view of an embodiment of the present invention, Fig. 3 is a sectional view thereof, and Fig. 4 is a partially exploded view of the tube. It is. 1...Temper cylinder, 2...Short cylindrical body for fixing, 3...
End plate, 4... Porous cylinder, 5... Stopper, 6... Tightening band.

Claims (1)

[Claims] 1 Paper or other sheet-like material is repeatedly folded in the longitudinal direction to form a large number of folds 1a to form a cylindrical shape, and V-shaped folded portions 1b and 1b' are respectively formed at the upper and lower ends of these folds, and the folded Part 1
A short cylinder 2, 2' for fixing is provided along the inside of the cylinders b, 1b', and an over cylinder 1 formed by sealing and bonding the outer circumferential wall of the short cylinder and the folded end is fitted to the outside of the perforated cylinder 4. A filter element characterized in that it is detachably fixed at the short fixing cylinders 2 and 2'.