JP2976065B2 - filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter having a filter frame body (hereinafter referred to as "frame body") which is folded in a zigzag shape and which can be replaced with airtightness.

[0002]

2. Description of the Related Art Conventionally, as a filter of this type, in order to ensure airtightness, both end surfaces and upper and lower end surfaces of a filter material folded in a zigzag shape are fixed to an inner wall of a frame body with an adhesive. A filter medium in which a filter medium is integrally fixed in a frame is used.

[0003] In addition, a heat seal portion is formed by heat-sealing the folded folds at both ends of the filter material which is folded in a zigzag shape, and this heat seal portion is formed on the outflow side of both side walls of a rigid frame formed in a box shape. There is also proposed a filter in which only the filter medium is replaceable by being inserted between a rib provided at an interval and a rigid frame side wall (Japanese Utility Model Laid-Open No. 6-39109).
Reference).

[0004]

However, the former cannot replace only the filter medium after a certain period of use,
The entire filter must be replaced, and most, except for some that can be incinerated, are disposed of as industrial waste and contribute to pollution.

In the latter case, not only is it necessary to form a heat seal portion and a rib for inserting the heat seal portion, but also the heat seal portion is simply inserted into a gap formed by the rib and the side wall. So there is a problem with airtightness,
In addition, since the filter medium is not foldable, there is a problem that not only does the filter medium become bulky during transportation and storage, but also the dirty surface on the upstream side that has collected dust is exposed when the filter medium is replaced, and becomes dirty during the replacement and transportation work of the filter medium.

The present invention solves the above-mentioned problems of the prior art, enhances the exchangeability and airtightness of the filter medium, makes it compact and foldable, makes it easy to transport and store, and has a dust collecting surface on the upstream side. It is an object of the present invention to provide a filter which can be folded inward so as to conceal the filter, thereby improving workability.

[0007]

Means for Solving the Problems To achieve the above object, a filter according to the present invention according to claim 1 includes a frame body,
A filter made of a filter material which is folded in a zigzag shape and has a deformation preventing material attached to upper and lower end surfaces, and a filter material fixing frame fitted to the frame body, wherein the frame body is at least one of an upper frame member and a lower frame member. To the left and right frame members so as to be slidable,
And a fitting part for mounting the filter medium fixing frame is formed in the opening portion on the upstream side, and a sealing piece provided with the filter medium fixing frame at the fitting part of the frame main body and the left and right edges of the filter medium continuously provided through the folded processing parts. It is inserted between the fitting pieces of the left and right frame members and the filter medium fixing frame, and is detachably fitted. With this configuration, the upstream opening portion of the frame body can be largely opened, so that replacement of the filter medium can be simplified, and the airtightness of the filter medium can be improved. Further, the filter of the present invention according to claim 2, the deformation preventing material attached to the upper and lower end surfaces of the filter medium, so that the filter medium can be folded with part or all of the upstream dust collection surface inside, One or a plurality of cuts are provided at intervals at a bottom of the valley approximately at the center of the zigzag mountain and mountain. With this configuration, the filter medium can be folded so as to conceal part or all of the dust collecting surface on the upstream side, which facilitates transportation and storage, and does not become dirty when replacing or transporting the filter, thereby improving workability. it can. Furthermore, the filter of the present invention described in claim 3 is:
Upper and lower end surface fixed to the deformation preventing material and above the filter media, between the lower frame member, formed by interposing a sealing member having elasticity. With this configuration, the upper and lower airtightness of the filter medium can be further improved.

By the way, at least one of the upper and lower frame members and the left and right frame members are provided with one or more longitudinal slots at at least one end of the left and right frame members, and the channel portions of the left and right frame members are provided. To insert the upper and lower frame members at both ends insertion part,
A rivet having a head is provided so as to be slid up and down by engagement of the elongated hole and the rivet, but a rivet is provided on the left and right frame members, and an elongated hole is provided on the upper and lower frame members. It is also possible. Further, at least one of the upper and lower frame members may be made slidable by other known means. Further, when screws are used instead of the rivets, the upper and lower frame members can be firmly fixed after sliding.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.
1, 2 and 3 show an embodiment of a filter according to the present invention. FIG. 1 is an exploded perspective view, FIG. 2 is an enlarged sectional view of a main part, and FIG. 3 is a perspective view showing a folded state of a filter medium. In the frame body of the filter, the frame body A is composed of left and right frame members 1, 1 and upper and lower frame members 2, 2. And the fitting pieces 11,
11, 21, and 21 are integrally protruded from each other, and the four fitting pieces constitute a fitting portion for attaching a filter medium fixing frame C described later. Also, at least one of the upper and lower frame members 2, 2 and the left and right frame members 1, 1 are provided with one or more longitudinal slots 13 at at least one end of the left and right frame members 1, 1, respectively. ,
A rivet 24 having a head is protruded from insertion portions 23, 23 formed by bending both end portions of the upper and lower frame members 2, 2 to be inserted into the channel portion of the right frame member. Thus, it is pivotally mounted so as to be able to slide up and down. B
Is a filter medium. This filter medium B is formed by attaching deformation preventing materials 4 to upper and lower end surfaces of a filter medium body 3 which is folded in a zigzag shape. Sealing pieces 31 having a width are continuously provided, and the deformation preventing member 4 is provided with a valley bottom almost at the center of the ridges of the filter medium body 3.
Or a plurality of notches 41, 41 are provided at intervals. C is a filter medium fixing frame, and the filter medium fixing frame C is the filter medium B
Of the left and right frame members 1, 1
It has a size that abuts on the outsides of the frame bodies 1 and 11 and securely fits into the fitting portion of the frame body A, and is provided with a filter material pressing portion 5 around the opening on the upstream side thereof.

By the way, when both the upper and lower frame members 2 and 2 can be slid to the left and right frame members 1 and 1,
The opening portion of the frame main body A can be further enlarged, and the replacement of the filter medium can be further facilitated.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments, but the present invention is not limited to these embodiments.

As shown in FIG. 1, the filter comprises a frame body A
, A filter medium B folded in a zigzag shape, and a filter medium fixing frame C. The frame body A includes left and right frame members 1 and 1 and upper and lower frame members 2 and 2 formed by molding a metal mold material such as aluminum or an aluminum alloy into a substantially angled shape by extrusion or drawing. And both frame members 1, 1, 2,
On the upstream side of 2, fitting pieces 11, 11, 21, 21 are integrally provided with stepped portions 12, 22 on the outer side, respectively.
The two fitting pieces constitute a fitting part for attaching the filter medium fixing frame C described later. By the way, the step 12 of the left and right frame members is
The fitting piece 11 and the filter material fixing frame C
So that it is slightly larger than the step 22 of the upper and lower frame members. Further, at least one of the upper and lower frame members 2 and 2 and the left and right frame members 1 and 1 are provided with one or more longitudinal slots 13 at at least one end of the left and right frame members 1 and 1, Insertion portion 2 formed by bending both end portions of upper and lower frame members 2 and 2 to be inserted into channel portions of left and right frame members.
A rivet 24 having a head is protruded from each of the rivets 3 and 23, and the rivet 24 is pivotally connected to the elongate hole 13 and the rivet 24 so as to be vertically slidable. In the figure, reference numerals 14 and 25 denote contact pieces that constitute a filter material contact portion that contacts the peripheral edge of the downstream end surface of the filter material B. By the way, in the above embodiment, the long hole 13 is on the left,
Although provided at one end of the right frame members 1 and 1, provided at both ends,
Both the lower frame members 3 and 3 may be slidable, and the long holes and the rivets may be provided in reverse.

Next, as for the filter medium B, seal pieces 31, 31 are connected to the left and right edges of the filter medium body 3 obtained by folding a nonwoven sheet formed in a sheet shape in a zigzag shape to a constant width, through a folded portion. Further, a deformation preventing member 4 made of nonwoven fabric or paper processed with a hot melt resin is integrally adhered to the upper and lower end surfaces of the filter medium body 3. The deformation preventing members 4 and 4 are spaced apart by 1
Or a plurality of cuts 41 are provided substantially at the center of the ridges of the filter medium main body 3 except for the valley bottom, and the filter medium B is positioned on the upstream dust collecting surface of the filter medium with the folding folds at the valley bottom centered. A part or the whole is concealed and can be folded inside, such as two-fold, three-fold, or four-fold. The number of the cuts 41 is determined according to the size (particularly, width) of the filter medium. by the way,
The notch part sets the folding part of the filter medium B in advance,
It is also possible to form a plurality of deformation preventing materials 4 by attaching them to the upper and lower end surfaces of the filter medium body 3. The deformation preventing material 4
A known nonwoven fabric or paper base material processed with a resin, polymer, plastic, or an adhesive thereof can be used.

Further, the filter medium fixing frame C is a frame material having a substantially L-shaped cross section made of the same material as that of the above-mentioned frame main body, and the filter material B is sealed outside the fitting pieces 11 of the left and right frame members. It is formed into a substantially rectangular shape having a size that sandwiches the pieces 31 and 31 and firmly fits into the fitting portion of the frame main body, and is provided with a filter material pressing portion 5 around its upstream side. .

When the filter medium is replaced using the filter of the above embodiment, it can be easily replaced by the following procedure.

First, after the filter medium fixing frame C is detached from the frame main body A, when one or both of the upper and lower frame members 2 are pulled outward, the frame slides so that the opening of the frame main body A becomes larger.
The filter medium B can be easily pulled out to the upstream side. As shown in FIG. 3, the extracted filter medium B is set so that the upstream side collecting surface, which is contaminated by collecting dust and the like at the cut portion 41, is inside. It can be folded and transported.

Next, when a new filter medium B is installed in the frame main body A, one or both of the upper and lower frame members 2 are pulled to enlarge the opening of the frame main body A, and the filter medium B is loaded. Then, when the upper and lower frame members 2 are slid and pushed in, the sealing pieces 31, 31 of the filter medium B are positioned outside the fitting pieces 11, 11, and the filter medium fixing frame C is fitted into the fitting portion. B can be attached while keeping its airtightness by sandwiching the left and right seal pieces 31, 31 and pressing the upper and lower end surfaces thereof by the upper and lower frame members 2, 2. At this time, if an elastic sealing member (not shown) is interposed between the upper and lower frame members 2 and 2 and the upper and lower end surfaces of the filter medium B, the airtightness of the filter medium can be further improved.

In the above-described embodiment, a long hole and a rivet are used as the slide mechanism for the upper and lower frame members. However, other known mechanisms can be used.

[0019]

The present invention is embodied in the form described above and has the following effects.

Since at least one of the upper and lower frame members is made slidable, the filter medium can be easily replaced, and the sealing pieces at both ends of the filter medium are sandwiched as they are as seal materials. It has excellent airtightness, and does not change in airtightness at both ends of the filter medium even if the filter medium shrinks during use.

Further, since the filter medium is foldable by concealing a part or the whole of the dust collecting surface on the upstream side thereof,
Not only is the handleability excellent during storage, but also the workability is improved without becoming dirty during replacement work.

Furthermore, it is possible to filter medium as above, since the interposed seal member having elasticity between the lower frame member, to further improve the upper and lower air-tightness of the filter media.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a filter of the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is a perspective view showing a folded state of the filter medium.

[Explanation of symbols]

 A. . . Frame body B. . . Filter medium C. . . Filter medium fixing frame 1. . . Left and right frame members 11. . Fitting piece 12. . Step 13. . Slot 14. . Contact piece 2. . . Upper and lower frame members 21. . Fitting piece 22. . Step 23. . Insertion section 24. . Rivets 25. . Contact piece 3. . . Filter medium body 31. . Seal piece 4. . . Deformation preventing material 41. . Notch 5. . . Filter media holder

Claims (3)

(57) [Claims] 1. A frame body in which a frame body is formed by left and right frame members and upper and lower frame members, a filter medium folded in a zigzag shape, and a deformation preventing material stuck to upper and lower end surfaces, and a frame body. A filter medium fixing frame attached to the upstream opening portion of the filter body, wherein the frame body pivotally slidably attaches at least one of the upper and lower frame members to one end of the left and right frame members, and In the opening part, a fitting part for attaching the filter medium fixing frame is configured,
The filter medium fixing frame is fitted to the fitting part of the frame body, and the sealing pieces provided continuously at the left and right end edges of the filter medium via the folded parts are sandwiched between the left and right frame members and the filter medium fixing frame, and fitted. The filter characterized by the above. 2. The deformation preventing material according to claim 1, wherein one or a plurality of cuts are provided at intervals so that the filter medium can be folded with part or all of the upstream dust collecting surface inside. The filter according to 1. Wherein said filter medium and the upper, between the lower frame member, according to claim 1 or 2 filter according to interposing a sealing member having elasticity.