JPH11141943A - Filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter device to use parts in common with each other, improve seal workability, and improve seal reliability. SOLUTION: Joining pieces 9 of four side plates 7 of a casing 2 to surround a square-shaped space incorporated in an air filter 3 are arranged and extended in a state to bend in an angle θ degree, preferably 135 deg., externally from a side plate face part 8 of the side plate 7. The adjoining pieces 9 and 9 are joined together by rivets 11, and a sealant 13 is adhered in a surface seal state to a corner part 12. As a result, leak from the internal part of the casing 2 is prevented from occurring, sealing ability is improved, and by using the side plates 7 in common with each other, the original cost is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter device having an air filter built in a casing.

[0002]

2. Description of the Related Art As a frame-shaped casing in which a ceiling-mounting frame is fixed to one of the open ends and an air filter is incorporated, for example, the one shown in FIG. 5 is conventionally used. As shown in the figure, the casing 2a is formed of a first flat plate.
Side plate 14 and a joint 16 bent at right angles to both ends.
And the second side plate 15 having the above-mentioned structure and being fixed to each other by being adjacent to each other. That is, the first side plate 1 having the same shape
4 and 14 are arranged facing each other, and the joint 16 of the second side plates 15 and 15 arranged facing each other is brought into contact with the edge of the first side plates 14 and 14 to form a frame. Formed of FIG. 6 is an enlarged view of a method of connecting and fixing the edge 14a of the first side plate 14 and the joint 16 and a method of sealing. That is, the edge 14 a and the joint 16 abutting on the edge 14 a are connected and fixed by the rivet 17. In this case, a caulking process using a sealing material 18 is performed between the end of the joining portion 16 and the first side plate 14 and further between the connecting portion 16 and the rivet 17 to prevent leakage.

[0003]

An important item in the filter device is to completely prevent air leakage from portions other than the air filter, and to simplify the assembly as much as possible and to use common components. . From this point, when the filter devices shown in FIGS. 5 and 6 are examined, there are the following problems. First, as for the sealing property, as shown in FIG. 5, the sealing property is temporarily secured by a caulking process. In this case, the caulking is a line seal, and the sealing is likely to be incomplete, and the sealing work is not performed. There are difficult problems. Further, the first side plate 14 and the joint portion 16 are fixed by the rivet 17, but if there is a gap around the rivet 17, there is a problem that the inside and the outside of the casing 2a communicate and a leak occurs. In addition, the casing 2a is made of a combination of the first side plate 14 and the second side plate 15 having different shapes, and there is a problem that the cost increases because the parts cannot be shared. Further, there is a problem that it is difficult to drive the rivet 17 and that the joining is insufficient.

[0004] The present invention solves the above-mentioned problems, and enables commonality of parts, reduction of cost, good assembling workability and sealing workability, and complete sealing. It is an object of the present invention to provide a filter device having a casing having a simple structure without a risk of leakage from around a connecting tool such as a rivet.

[0005]

According to a first aspect of the present invention, there is provided a filter device in which an air filter is incorporated in a casing having a duct connection port. And the casing is
In a filter device comprising a top plate forming a ceiling portion, a side plate attached to the top plate to form a side portion, and a filter receiving frame attached to an inner wall portion of the side plate, a joining portion of the side plates adjacent to each other and having the same shape. However, it is characterized in that joining pieces which are bent outward from the side plate surface of the side plate by an angle θ and joined are joined to each other.

Further, in the filter device according to a second aspect of the present invention, the side plate is formed of four identical plate members, and the angle θ
Is 135 °.

The filter device according to a third aspect of the present invention is characterized in that face seal caulking with a sealing material is applied to a corner portion of the joint between the joint pieces.

[0008] The casing of the present invention comprises a common side plate joined together and connected and fixed. That is, all the side plates are made of a common plate material having a joint piece bent outward from the side plate surface of the side plate, and the joint pieces of the adjacent side plates are joined together and assembled. Therefore, the cost of the components is reduced, and the assembling work is easy. Also,
The connection of the adjacent side plates is such that the portion of the joining piece extending outward is fixed with a rivet or the like.Even if there is a gap around the rivet, it is completely unrelated to the inside of the casing,
Leakage unlike the prior art does not occur. Further, since the surface seal caulking is performed from the inside at the corner portion where the joining pieces are joined, the sealing performance is improved and the sealing work can be facilitated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the filter device of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a filter device 1 of the present invention includes a casing 2 and an air filter 3 incorporated in the casing 2, and a ceiling mounting frame 4 is fixed to a lower end of the casing 2.
A top plate 5 is attached to the upper opening of the casing 2. As shown in the figure, the air filter 3
It is supported by a filter receiving frame 6 provided in the casing 2.

In this embodiment, the casing 2 is formed by using four side plates 7 having the same shape, and joining both edges thereof to each other to form a frame. The side plate 7 has a flat side plate surface portion 8.
And joining pieces 9, 9 that are bent from the both ends by an angle θ and extend outward. Since four side plates 7 having the same shape are used, in this example, θ =
135 °. In addition, one side plate 7 has a duct connection port 1.
0 is provided.

As shown in FIGS. 2 and 3, the adjacent side plates 7, 7 are joined together by joining the respective joining pieces 9, 9, and an intermediate portion of the joining pieces 9, 9 is held by rivets 11, and both are joined. The bonding pieces 9 are pressed against each other.
Thus, a square casing 2 is formed. The top plate 5 and the side plate 7 are joined by joining the joining pieces 5a of the top plate 5 and the upper end 7a of the side plate 7 and fixing them with rivets 11, as shown in FIG.

The air filter 3 has a shape to be housed inside a casing 2 formed in a frame shape as shown in FIG. Incidentally, as shown in FIG.
Is set at a predetermined position by the filter receiving frame 6.

As shown in FIG. 3, the joint pieces 9, 9 which are joints between the adjacent side plates 7, 7 are arranged on the outer side irrespective of the rectangular space in the casing 2 as described above. Therefore, the rivet 11 is driven very easily. Further, the joining pieces 9, 9 can be joined so that a gap between the joining pieces 9, 9 hardly occurs. Therefore, assembling workability is better as compared with the prior art, and the joining pieces 9, 9 are joined with high accuracy. For this reason, unlike the prior art, leakage does not easily occur even without sealing with a sealing material. However, in order to complete the sealing, caulking using a sealing material is also performed in this example.

As shown in FIG. 3, a corner portion 12 having an intersection angle of 90 ° is formed at the corner portion where the joint pieces 9, 9 of the adjacent side plates 7, 7 are formed. Caulking with a sealing material 13 is performed on the corner 12 as shown. In this caulking process, unlike the conventional line seal, the seal material is adhered to the corner 12 in the state of the face seal, so that the seal can be completed and the reliability can be improved. Also, even if there are gaps between the joint pieces 9 and 9 and around the rivet 11, those gaps are blocked by the sealing material 13, and there is no communication between the rectangular space 10 and the outside, and leakage occurs. Absent.

In the above description, the casing 2 has a square shape surrounded by four side plates 7 of the same shape, but the number of the side plates 7 is not limited to four. Therefore, the value of the angle θ changes according to the number of the side plates 7.

[0016]

1) According to the filter device of the present invention, since the casing is formed of a plurality of side plates having the same shape, the members can be standardized, the cost can be reduced, and the joining piece can be removed from the side plate surface. And it is joined at that part, so that workability can be improved. In addition, since the face seal caulking process is performed at the corner portion, completeness of the seal and improvement in reliability can be achieved. Furthermore, rivet sealing is not required, and workability is improved. 2) According to the filter device of the present invention, the angle θ of the joining piece of the casing composed of the four side plates having the same shape is 135.
Therefore, the joining pieces of the adjacent side plates are in close contact with each other, so that the joining work of the joining pieces can be facilitated and the sealing property can be improved. 3) According to the filter device of the present invention, since the corner portion of the joining portion between the joining pieces is surface-sealed, the sealing performance is improved, and even if there is a gap around the joining portion of the joining pieces, the sealing material blocks the gap. No leakage occurs.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall structure of a filter device according to the present invention.

FIG. 2 is a plan view showing the structure of a casing according to the present invention.

FIG. 3 is an enlarged partial cross-sectional view showing a detailed structure around an extended joining piece of a casing.

FIG. 4 is an enlarged partial sectional view showing a detailed structure of a ceiling portion of a casing according to the present invention.

FIG. 5 is a plan view showing a conventional casing.

FIG. 6 is an enlarged partial sectional view showing a detailed structure of a connecting portion of the casing of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filter device 2 Casing 3 Air filter 4 Ceiling mounting frame 5 Top plate 5a Joining piece 6 Filter receiving frame 7 Side plate 7a Upper end portion 8 Side plate surface portion 9 Joining piece 10 Duct connection port 11 Rivet 12 Corner 13 Sealing material

Claims (3)

[Claims] 1. A filter device in which an air filter is built in a casing having a duct connection port, wherein the casing is a top plate forming a ceiling portion, a side plate attached to the top plate to form a side portion, In a filter device including a filter receiving frame attached to an inner wall portion of the side plate, a joining portion of the side plates having the same shape adjacent to each other is formed by joining a bent piece extending outward from a side plate surface of the side plate by an angle θ. A filter device characterized by being joined to each other. 2. The filter device according to claim 1, wherein the side plate is formed of four identical plate members, and the angle θ is 135 °. 3. The filter device according to claim 1, wherein a surface seal caulking by a sealing material is applied to a corner portion of a joining portion between the joining pieces.