JPS6140323Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a laminated paper filter.

Internal combustion engines, especially diesel engines, require a large flow of oil and fuel, and also require filtering out a large amount of particulate matter, so laminated paper filters are often used to purify the fuel. This laminated paper filter has a filter body constructed by laminating a large number of filter paper discs, and can satisfy the above-mentioned purification conditions.

By the way, in the case of such a laminated filter paper type filter, when used for a long time, the filter paper disk constituting the filter body gradually becomes thinner due to fatigue, and the total height of the filter body changes in the direction of decrease. Then, a gap is created by the amount corresponding to this decrease in height, and there is a problem in that unfiltered oil/fuel leaks into the filtered oil/fuel from this gap and mixes into the filtered oil/fuel, resulting in a decrease in the purification function.

SUMMARY OF THE INVENTION In view of these conventional problems, it is an object of the present invention to provide a laminated paper filter that prevents oil and fuel from leaking despite the reduction in the overall height of the filter body.

Another object of the present invention is to provide a laminated paper filter in which the filter paper disks constituting the filter body can be positioned reliably.

In order to achieve such an object, the laminated paper filter of the present invention includes a filter body constructed by laminating filter paper discs, end plates attached to both ends of the filter body, and these end plates. a subplate that is polymerized further outwardly of one or both of the
A regulating member that closely penetrates the inside of the filter body and is arranged at the outermost side of both ends of the filter body and determines the length between the sub-plate or the end plate, and the sub-plate and this sub-plate overlap. and a compression spring provided between the end plate and the end plate.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

That is, FIG. 1 shows a laminated paper filter (hereinafter referred to as filter) 1 showing an embodiment of the present invention.
In this filter 1, a filter body 2 formed into a cylindrical shape by stacking annular filter paper disks is housed in a shell (not shown), and the oil and fuel introduced into the shell are passed through a hollow tube from the outside of the filter body 2. It is designed to be filtered when reaching the section 2a. End plates 3 and 4 are provided at both upper and lower ends of the filter body 2.
are integrally attached, and these end plates 3 and 4 separate the outside of the filter body 2 and the inside of the hollow portion 2a. In addition, the lower end plate 4
An opening 4a is formed in the center of the opening 4a.
Filtered oil fuel is discharged from the tank.

On the other hand, a sub-plate 5 is superimposed on the outer side (upper side in the figure) of the upper end plate 3, and the peripheral edge of the sub-plate 5 is bent downward into an annular shape.
The end plate 3 is attached to the inner periphery of this annular bent portion 5a.
The peripheral edges of the two are slidably and closely fitted. Further, a plurality of rods 6 as regulating members are provided inside the filter body 2 and closely penetrate through the end plates 3, 4 and the sub-plate 5, respectively. The sub-plate 5 and the end plate 4 are bent on the outside of the lower end plate 4, and the dimensions are determined so that the distance between the sub-plate 5 and the end plate 4 does not extend beyond a predetermined amount, that is, the distance in the original assembled state.

A recess 2a that recesses into the hollow 2a of the filter body 2 is formed in the center of the upper end plate 3, and a compression spring 7 is inserted between the bottom of the recess 2b and the sub-plate 5. The compression spring 7 urges the end plate 3 and the sub-plate 5 in a direction to separate them from each other.

With the above configuration, even if the total height h of the filter body 2 decreases as shown in FIG. 2 during long-term use, the compression spring 7 pushes the sub-plate 5 upward, so the rod 6 The distance H between the regulated sub-plate 5 and the lower end plate 4 is always kept constant. Therefore, the filter 1 prevents the unfiltered oil-fuel from leaking into the filtered oil-fuel without creating a gap between the filter 1 and the shell.

Further, since the rod 6 is closely penetrated into the filter body 2, it is possible to perform positioning between the filter paper disks constituting the filter body 2, and to position the filter body 2, the end plates 3, 4, and Positioning with the sub-plate 5 can also be performed. In addition, in this embodiment, the sub-plate 5 is the upper end plate 3.
The filter body 2 is provided between the two sides.
The opening 4 through which the filtered oil fuel is filtered is shown to compensate for the thinning of the wall due to settling.
A sub-plate may be provided on the lower end plate 4 side for the purpose of strengthening the liquid-tight function of the portion a, or a sub-plate may be provided on both the upper and lower end plates 3 and 4, respectively. Of course, even in this case, it goes without saying that a compression spring is provided between the sub-plate and the end plate on which this sub-plate is superimposed.

As explained above, in the laminated paper filter of the present invention, the reduction in the overall height of the filter body is compensated for between the sub-plate and the end plate, so that the filter body can be used for a long time. Even if settling occurs due to this, the liquid before filtration will not leak into the liquid after filtration, and a decrease in the purification function can be prevented.

Furthermore, by closely penetrating the regulating member into the filter body, it is possible to position the filter paper disks that make up the filter body, and this also prevents the purification function from deteriorating. It has this excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a laminated paper filter showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the laminated paper filter shown in FIG. 1 in an operating state. DESCRIPTION OF SYMBOLS 1... Laminated paper filter, 2... Filter body, 3, 4... End plate, 5... Sub plate, 6... Rod (regulating member), 7... Compression spring.

Claims (1)

[Scope of utility model registration request] A filter body constituted by stacking filter paper disks, an end plate attached to each end of the filter body, and a sub-plate superimposed on the outer side of one or both of these end plates. , a regulating member that closely penetrates the inside of the filter body and determines the distance between the sub-plate or the end plate, which is disposed at the outermost side of both ends of the filter body; 1. A laminated filter paper filter comprising a compression spring provided between an end plate to be polymerized and a compression spring.