JPS6225206Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a filter that filters fluid.
In particular, the present invention relates to an improvement in the fixing structure of a spouting part for extracting fluid to the outside.

Conventionally, a filter paper element is housed in a container with openings at both ends, a cap with an unsealable spout is attached to one open end, and a fluid such as oil is fed from the other open end, and the filtrate is discharged from the cap's spout. There are so-called separate type filters that take out the .

In this type of filter, the cap is usually screwed onto the container, and a boss member with a screw is attached to the container side.

In this case, the structure for fixing the boss member and the container is often such that the boss member is welded to the periphery of the opening end of the container. However, the fixing structure by welding has drawbacks such as a complicated process, a long processing time, and if the welding is incomplete, cracks will form in the welded part and the filter will no longer function as a filter.

This idea was created in view of the above problems, and its purpose is to provide a flange with a diameter larger than the diameter of the opening end of the container body of the filter, so that it can be inserted into the opening end of the container body. It consists of a boss member that is inserted from the side, a ring-shaped gasket that is interposed between the flange of the boss member and the container body, and a ring material that is fitted on the outer surface of the boss member. By press-fitting the ring material, the gasket is compressed between the end of the ring material and the flange via the open end, and the open end and the boss member are fixed in a liquid-tight manner. By employing this configuration, it is possible to provide a filter that can liquid-tightly fix the boss member to the main body with just one touch.

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

FIG. 1 shows an embodiment of a filter according to the present invention.

The filter shown in the figure has a cylindrical container body 10.
A diameter-reduced opening 10a is formed at the upper end, and upper and lower end plates 11 and 12, each having a plurality of through holes 11a and 12a, are sandwiched inside the container body 10, similar to a normal filter. If the filter element 36 is attached and, for example, lubricating oil is supplied through the through hole 12a of the lower end plate 12, the oil filtered by the filter element 36 will flow through the through hole 11a of the upper end plate 11. It can be taken out from the spout which will be described later. A synthetic resin boss member 14 having a ring-shaped flange 13 having a diameter larger than the diameter of the opening 10a is inserted from inside the opening 10a of the container body 10. The boss member 14 has a double structure of an outer cylinder 16 that is formed upright on the flange 13 and has approximately the same diameter as the opening 10a, and a hollow inner cylinder 18 that is formed upright inside the outer cylinder concentrically with the outer cylinder 16, A spiral groove 18a is provided on the inner surface of the inner tube 18, a concave groove 16a is provided on the outer surface of the outer tube 16 so as to go around the outer surface, and a ring groove 13a is provided on the upper surface side periphery of the collar portion 13. is formed into an annular shape, and this ring groove 13a
An annular gasket 20 is seated on. A gap is defined below the flange 13 by forming a plurality of ribs at predetermined intervals, and the filtrate is delivered to the cap spouting pipe through the gap, and a substantially conical A closing portion 22 that is closed by inserting the protrusion 22a into the spout tube is integrally formed to hang down.

Further, an outer cylinder 1 is provided on the outer surface of the boss member 14.
A ring material 24 made of synthetic resin having a protrusion 24a on the inner surface that fits into the groove 16a provided in the boss member 6 is press-fitted from above, and the lower end of the ring material 24 and the flange portion 13 of the boss member 14 are press-fitted from above. The gasket 20 is compressed between the opening 10a of the container body 10, and the container body 10 and the boss member 14 are fixed liquid-tightly.

The boss member 14 fixed in this way has
A cap 26 is removably screwed on. A hollow spouting pipe 28 is formed hanging down from the cap 26 almost at the center thereof, and a spiral groove is formed on the outer peripheral surface of the spouting pipe 28 to engage with a spiral groove provided in the inner cylinder 18 of the boss member 14. A concentric outer wall 30 is formed to hang down from the outside of the spouting tube 28. An O-ring 32 is fitted into a groove 30a formed on the outer peripheral edge of the outer wall 30. Furthermore, when screwing the cap 26 onto the boss member 14, the outer wall 30
The O-ring 32 fits into the space defined between the cap 26 and the boss member 14.
is compressed in close contact with the inner surface of the outer cylinder 16.

In the filter configured as described above, the boss member 14 is attached to the gasket 20 at the opening of the container body 10.
After inserting the ring material 2 through the boss member 14,
Even with just one touch of press-fitting 4,
The boss member 14 can be fixed, and
Since the container body 10 of the boss member 14 is maintained uniformly liquid-tight by the gasket 20 interposed therebetween, there is no possibility that cracks would occur in places where welding is incomplete and the liquid-tightness could not be maintained as in the conventional case. Since the boss member 14 and the like are made of synthetic resin, it is possible to manufacture a filter of high quality at a very low cost and in a short period of time. Further, when the cap 26 is screwed onto the boss member 14, the outer wall 30 provided on the cap 26 expands the outer cylinder 16 of the boss member 14 outward through the O-ring, so that the outer cylinder 16 is pushed outward. The boss member 14 and the ring member 24 are more firmly fitted together, and thereby the boss member 14 and the container body 10 are more firmly fixed. Furthermore,
When the opening 10a of the container body 10 and the outer cylinder 16 of the boss member 14 are made into substantially the same polygonal shape, they match and the boss member 14 is more firmly fixed without rotating. Various effects can be achieved, such as the ability to

In addition, in the above-mentioned embodiment, the outer cylinder 1 of the boss member 14
Although the concave groove 16a is provided on the boss member 14 and the concave groove 24a is provided on the inner surface of the ring material 24, the present invention is not limited to the shape, and the boss member 14 is provided with a convex groove and the ring material 24 is provided with a concave groove. A similar effect can also be obtained.

[Brief explanation of the drawing]

The figure is a partially cutaway exploded view showing a filter according to the present invention. 10... Container body, 10a... Opening, 13...
...Flame portion, 14...Boss member, 20...Gasket, 22...Closing portion, 24...Ring material, 26...
...Cap, 36...Filter paper element.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A filter in which a filter paper element is housed in a container body with openings at both ends, and a cap is attached to one opening end with a spout for taking out the filtrate; a boss member that is inserted from the other side of the container body and is interposed between the open end and the cap; It consists of a ring-shaped gasket interposed between the boss member and a ring material fitted to the outer surface of the boss member, and by press-fitting the ring material, the end of the ring material and the flange are connected. 1. A filter characterized in that the gasket is compressed through the open end between the gasket and the boss member, and the open end and the boss member are fixed. (2) The filter according to claim 1, wherein the opening end and the vicinity of the lower flange of the boss member have substantially the same polygonal shape. (3) Utility model registration claim 1, characterized in that a groove is formed on one of the boss member and the ring material, and a protrusion that fits into the groove is formed on the other. Or the filter described in Section 2.