JPH10211411A - Filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filer which is highly airtight and can be easily manufactured. SOLUTION: The filter 1 comprises a filter medium 2 which is folded in a pleats fashion and fixed to retainers 4 arranged around the filter medium 2 with the help of an adhesive 3. These retainers 4 gives shape retention to the filter medium 2 and also serves to fix the filter medium 2 to the interior of frame members 6 without a gap. In addition, the lower end part of the retainers 4 has a protrusion part 4a formed jutting, e.g. about a few millimeters, out of one of the faces 2a of the filter medium 2. The protrusion part 4a is fixed airtightly to the edge parts 6a of the frame members 6 with a U cross section designed to retain an adhesive 5. Thus the filter medium 2 is airtightly bonded firmly to the frame members 6 through the retainers 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter,
The present invention relates to a filter that has excellent airtightness and can be easily manufactured.

[0002]

2. Description of the Related Art Conventionally, an air purifying filter for collecting dust and the like is used by mounting the filter in a limited container, and the collecting performance is related to the ventilation resistance and the filter area. It is also required that one filter can collect as much dust and the like as possible. Therefore, the surface area of the filter is increased by folding the filter material constituting the filter into a pleated shape, and the amount of dust and the like collected is increased while the airflow resistance is kept low.

FIG. 4 is an exploded perspective view showing a conventional foldable filter unit. In the figure, a filter unit 10 includes an upper casing 11 and a lower casing 12.
And a filter medium 20 sandwiched between them.
The upper casing 11 has an upper comb-shaped projection 14 formed thereon. The upper comb-shaped projection 14 includes an upper comb-shaped projection 14a and an upper comb-shaped groove 14b. Similarly, a lower comb-shaped projection 16 is formed on the lower casing 12, and the lower comb-shaped projection 16 is composed of a lower comb-shaped projection 16a and a lower comb-shaped groove 16b. . In addition, a bridging support portion 17 traversing the filter hole 15 is formed in the lower comb-like projection portion 16.

FIG. 5 is a side sectional view showing the filter unit 10, showing a state in which the filter medium 20 is sandwiched between the upper casing 11 and the lower casing 12. That is, as shown in the figure, the circular filter medium 20 is supported by the engagement between the upper comb-shaped projections 14 of the upper casing 11 and the lower comb-shaped projections 16 of the lower casing 12. Further, the airtight projections receiving grooves 19 and the airtight projections 18 formed on the connection surface 13a of the upper casing 11 and the connection surface 15a of the lower casing 12, respectively,
The filter medium 20 is airtightly held. In addition, bridge support 17
Thereby, the pleated shape of the filter medium 20 is maintained. In such a state, the filter unit 10 filters the gas passing between the filter holes 13 and 15.

[0005]

In such a conventional filter unit 10, in order to obtain sufficient airtightness, the upper comb-like projections 14, the lower comb-like projections 16, the filter medium 20 and the like are precisely manufactured. Must. Also, when assembling the filter unit 10, the upper casing 11
There is a problem that it is necessary to accurately position the filter and the lower casing 12, and it is difficult to obtain a filter having excellent airtightness.

Further, in another filter, the filter medium and the frame material are directly integrated with each other by a urethane adhesive or an epoxy adhesive. However, since this adhesive has a long hardening time, it has a characteristic that sagging easily occurs. . For this reason, there has been a problem that the adhesion between the filter medium and the frame material becomes nonuniform, and sufficient airtightness cannot be obtained. Such poor airtightness is particularly noticeable in the case of circular filters.

Accordingly, an object of the present invention is to provide a filter which is excellent in airtightness and can be easily manufactured.

[0008]

According to a first aspect of the present invention, there is provided a filter having a filter medium and a holder having an end protruding from one side of the filter medium, the filter medium being airtightly bonded to the filter medium and being disposed on an outer periphery of the filter medium. What is claimed is: 1. A filter comprising: a material; and a frame member which is disposed on an outer periphery of the holding material and has an edge portion which receives a protruding end of the holding material and is air-tightly bonded.

According to the present invention, since the holding material is provided on the outer periphery of the filter medium and is air-tightly bonded, the shape of the filter medium can be easily held. In addition, by adhering the filter medium to the holding material in advance, the filter medium can be easily and reliably adhered to the frame material, rather than directly adhering the filter medium to the frame material. Furthermore, after the adhesive is held at the edge of the frame material, the protruding end of the holding material may be inserted, so that the adhesive does not hang down and the holding material is uniformly and securely airtightly bonded to the frame material. And a filter can be manufactured by a simple operation.

According to a second aspect of the present invention, the filter medium is pleated. According to the present invention, the surface area of the filter medium can be easily increased, and a large amount of dust and the like can be captured.

According to a third aspect of the present invention, the frame member is provided with a lid member that covers at least one surface of the filter medium. According to this invention, when a force is applied from the outside, the filter member can be protected by the lid member.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a filter according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a filter according to an embodiment of the present invention, and FIG. 2 is an end view showing an end face cut along a line II-II in FIG. In these figures, the filter medium 2 of the filter 1 is bent in a bellows or pleated shape so that the surface area thereof increases.
It is air-tightly fixed by an adhesive 3 to a holding member 4 arranged around the filter medium 2. The holding material 4 gives the filter medium 2 a shape-retaining property, and at the same time, plays a role of fixing the filter medium 2 in the frame material 6 without any gap.

The lower end of the holding member 4 projects from the one surface 2a of the filter medium 2 (the largest projecting surface of one side when the filter medium is pleated), for example, about several millimeters, preferably about 2 mm to 5 mm. The part 4a is formed. The protruding portion 4a is air-tightly fixed to the edge 6a of the frame member 6 having a U-shaped cross section so that the adhesive 5 can be held.

A filter according to one embodiment of the present invention is configured as described above and is manufactured as follows.

First, a pleated filter medium 2 is prepared. As the filter medium 2, various materials such as natural fibers and synthetic fibers can be used without particular limitation, and a melt blown nonwoven fabric, glass filter paper, or the like can be preferably used. Various fiber diameters can be used depending on the size of the dust to be removed.

The pleat spacing of the filter medium 2 and the thickness B of the filter medium 2 shown in FIG. 2 can be of various dimensions depending on the purpose and size of the filter.

Next, the filter medium 2 is bonded to the holding material 4 with the adhesive 3. The holding material 4 does not need to be formed in a ring shape from the beginning, and after applying an adhesive to the flat holding material,
May be wrapped around the outer periphery. In this way, filter medium 2
Can be easily and reliably airtightly bonded to the holding member 4. Here, the holding material 4 can be used without any particular limitation as long as it can impart the shape retaining property of the filter medium 2, and for example, various knitted fabrics, papers, films, nonwoven fabrics, and the like can be used. Further, as shown in FIG. 2, the height A of the holding material 4 is slightly larger than the thickness B of the filter medium 2 to form the protruding portion 4 a. As the adhesives 3 and 5, a hot-melt adhesive made of a thermoplastic resin, for example, polyvinyl acetate or the like can be suitably used because it has a short curing time and does not cause problems such as dripping.

Subsequently, after the edge 5a of the frame 6 is filled with the adhesive 5, the protrusion 4a of the holding material 4 integrated with the filter 2 is formed.
Is embedded in the adhesive 5 and fixed to complete the filter.
As the frame member 6, for example, various plastics and the like can be used without particular limitation. Further, the diameter of the frame member 6 can be appropriately selected from several centimeters to several tens of centimeters according to the purpose of use of the filter. Various values can be adopted for the height of the frame member 6 according to its diameter.

Since each end of the pleats of the filter medium 2 is adhered to the holding material 4, the pleat shape of the filter medium 2 is maintained without using any reinforcing material. However, even when a force is applied from the outside, the lid member 7 as shown in FIG. 3 may be provided on at least one surface of the frame member 6 in order to more reliably hold and protect the pleated shape of the filter medium 2. good. Further, the shape of the edge 6a of the frame member 6 is not limited to the aforementioned U-shaped cross section, but may be any other shape such as a U-shaped cross section that can receive an adhesive.

Further, in the above-described embodiment, the case where the pleated filter medium 2 is used has been described. However, a flat filter medium can be similarly used. Further, the filter medium is not limited to the fibrous filter medium, but may be a sponge-like filter medium. Further, the frame member 6 is not limited to the circular shape, and the same effects as described above can be obtained even if the frame material 6 is elliptical or rectangular.

Further, the filter according to the present invention can be applied not only to a dust collection filter but also to an air filtration filter, an air cleaning filter, a gas mask and the like.

[0023]

As described above, according to the present invention,
By providing the holding material on the outer periphery of the filter medium, the shape of the filter medium can be easily held, and the filter medium can be easily and reliably bonded to the frame material by airtightly bonding the filter medium to the holding material in advance. . Furthermore, after the adhesive is held at the edge of the frame material, the protruding end of the holding material may be inserted, so that the adhesive is uniformly and securely airtightly bonded to the frame material without the adhesive hanging down. And a filter can be manufactured by a simple operation.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a filter according to an embodiment of the present invention.

FIG. 2 is an end view showing an end face cut along a line II-II in FIG. 1;

FIG. 3 is a plan view showing a lid member.

FIG. 4 is an exploded perspective view showing a conventional filter unit.

FIG. 5 is a side sectional view showing a conventional filter unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Filter, 2 ... Filter material, 2a ... Single surface, 3,5 ... Adhesive, 4 ... Holding material, 4a ... Protrusion, 6 ... Frame material, 6a ... Edge, 7 ... Lid member.

Claims (3)

[Claims] 1. A filter medium, a holding material that is disposed on an outer periphery of the filter medium and is hermetically bonded to the filter medium, and that has an end protruding from one surface of the filter medium, and that is disposed on an outer periphery of the holding material, A frame member having an edge portion which receives the protruding end portion of the holding member and is air-tightly bonded thereto. 2. The filter according to claim 1, wherein said filter medium is pleated. 3. The filter according to claim 1, wherein the frame member is provided with a lid member that covers at least one surface of the filter member.