JPH0952012A - Filter attaching structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter attaching structure capable of reducing a dead space. SOLUTION: This filter attaching structure is constituted so that a filter frame 12 airtightly surrounding the filter material 11 of an air filter is airtightly fixed to the filter attaching frame 2 provided in a chamber 1. An engaging recessed part 13 is provided to the outer periphery of the filter frame 12 and the engaging pin 3 freely engaged with the engaging recessed part 13 is provided to the filter attaching frame 2 and the gap between the filter frame 12 and the filter attaching frame 2 is sealed by a seal material 7 in such a state that the engaging pin 3 is engaged with the engaging recessed part 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter mounting structure for fixing an air filter to a filter mounting frame provided inside a chamber.

[0002]

2. Description of the Related Art Conventionally, for example, a method shown in FIG. 4 is known for attaching an air filter to a chamber. That is, the filter frame c that hermetically surrounds the outer periphery of the filter material b of the air filter a is clamped and fixed to the filter mounting frame f provided in the chamber e via the gasket d made of chloroprene rubber. In this tightening and fixing, for example, the upper end surface of the filter frame c is brought into contact with the filter mounting frame f, the filter mounting bracket g is brought into contact with the lower surface of the filter frame c, and the tightening member h composed of a stat bolt is tightened. The filter mounting bracket g is fastened to the air filter a.

[0003]

However, in the above-mentioned conventional stat bolt method, the chamber e and the filter a are used.
There is a problem in that a dead space where air is not blown out becomes large because a space for mounting a stat bolt is required between them. Therefore, an object of the present invention is to provide a filter mounting structure that solves the above-mentioned inconveniences of the prior art and that requires a small dead space.

[0004]

In order to achieve the above object, the air filter mounting structure according to the present invention hermetically seals the filter frame surrounding the outer periphery of the filter medium of the air filter to the filter mounting frame provided in the chamber. In the filter mounting structure that is fixed, an engaging recess is provided on the outer periphery of the filter frame, and an engaging pin engageable with the engaging recess is provided on the filter mounting frame. It is characterized in that the space between the filter frame and the filter mounting frame is sealed with a sealing material in a state of being engaged with the engagement recess.

In this case, the engaging pin is provided at the upper end of the shaft airtightly attached to the filter mounting frame, the lower end of the shaft is projected to the lower surface of the filter mounting frame, and the rotation of this projecting portion is increased. It is preferable that the engaging pin can be operated by movement. In order to airtightly attach the shaft for rotating the engagement pin to the filter attachment frame, it is preferable to adopt a seal structure using, for example, an O-ring or oil. In particular, an O-ring is preferable because it is easy to handle the sealing material. The shape of the engagement pin is not particularly limited as long as it is integral with the shaft and protrudes in the horizontal direction. For example, there are various shapes such as a band plate shape and a bar shape, but the deformation strength is large. A pin shape is preferable. Further, the engagement recess provided in the filter frame may be present at least at the engagement position corresponding to the engagement pin, and the shape thereof is not particularly limited, and for example, the filter frame may be used to reinforce the filter frame. A long groove portion or the like extending along the longitudinal direction of the side plate can also be used.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the air filter mounting structure of the present invention will be described with reference to FIGS. In the figure, reference numeral 1 denotes a casing (chamber), and along the inner peripheral surface of the casing 1, a frame-like shape slightly larger than the outer periphery of a filter frame 12 that hermetically surrounds the filter medium 11 of the air filter 10. A filter mounting frame 2 made of assembled channel material is provided.

Two engaging recesses 13 are provided on the outer peripheral surface of each side plate of the filter frame 12. Further, the filter frame 1 is attached to the filter mounting frame 2.
2 at the positions corresponding to the respective engaging recesses 13
Is provided with an engagement pin 3 formed of a spring pin that can be engaged with. The engagement pin 3 is used for the filter mounting frame 2
Is fixed to the upper end of a shaft 6 that is airtightly attached to a washer 4 provided on the shaft 6 through an O-ring 5, and the shaft 6 can be engaged with the engaging recess 13 by a rotating operation. . The lower end of the shaft 6 projects downward from the lower end surface of the filter mounting frame 2, and the engaging pin 3 can be operated by rotating the projecting portion 6a. A sealing material 7 is provided between the filter frame 12 and the filter mounting frame 2 in a state in which the engaging pin 3 is engaged with the engaging concave groove 13 so as to be airtight.

To construct the filter mounting structure, first, the engaging pin 3 is removed at a position where it does not engage with the engaging recess 13, and in this state, the air filter 10 is formed by the filter mounting frame 2. Horizontally lifted from the downstream side with respect to the opening and inserted, and then the protruding portion 6a of the shaft 6
Is rotated with a wrench or the like to rotate the engagement pin 3 to engage with the engagement recess 13 of the filter frame 12, and in this state, the sealing material 7 is provided between the filter frame 12 and the filter mounting frame 2. Should be given.

When removing the air filter 10,
The protrusion 6a of the shaft 6 is rotated with a wrench or the like to rotate the engagement pin 3 to release the engagement with the engagement recess 13, and the air filter 10 is lowered to the downstream side in this state. Good.

[0010]

As described above, according to the filter mounting structure of the present invention, since the filter is not clamped and crimped to the filter mounting frame by the stat bolt through the gasket, the installation space for the stat bolt and the filter mounting bracket is reduced. It is possible to reduce the dead space for blowing clean air. Moreover, the problem of dust generation from the gasket, which is a problem in the super clean room, is eliminated. Also, since the air filter can be installed and removed only by rotating the shaft, it is easy to install and remove the filter.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of a filter mounting structure of the present invention.

FIG. 2 is a perspective view of the main part.

FIG. 3 is a perspective view showing details of a mounting state of the shaft.

FIG. 4 is a front sectional view of a conventional filter mounting structure.

[Explanation of symbols]

 1 Casing (Chamber) 2 Filter Mounting Frame 3 Engagement Pin 4 Washer 5 O-Ring 6 Shaft 6a Projection 7 Sealing Material 10 Air Filter 11 Filter Material 12 Filter Frame 13 Engagement Recess

Claims (3)

[Claims] 1. A filter mounting structure in which a filter frame surrounding an outer periphery of a filter medium of an air filter is airtightly fixed to a filter mounting frame provided in a chamber, the filter mounting structure engaging with an outer periphery of the filter frame. In addition to providing the concave portion, the filter mounting frame is provided with an engaging pin that is engageable with the engaging concave portion, and the filter frame and the filter mounting frame are provided with the engaging pin engaged with the engaging concave portion. A filter mounting structure characterized in that the space is sealed with a sealing material. 2. The engagement pin is provided on an upper end portion of a shaft airtightly attached to the filter mounting frame, a lower end portion of the shaft is projected to a lower surface of the filter mounting frame, and the protruding portion is rotated. The filter mounting structure according to claim 1, wherein the engaging pin can be operated by means of. 3. The filter mounting structure according to claim 2, wherein the shaft is airtightly mounted on a washer provided on the filter mounting frame via an O-ring.