JPH08103614A - Method for mounting air filter - Google Patents

Abstract

PURPOSE: To simplify the attaching and detaching operation and to enhance the airtightness by using a gasket with a viscoelastic sealant provided on both sides of the core material. CONSTITUTION: A duct chamber 2 is provided along the lower face of a ceiling plate 1, an air blowoff port 3 is provided to the chamber, and an air filter 5 is pressed and fixed on the blowoff port 3 through a gasket 4. The gasket 4 is obtained by laminating 3 flat viscoelastic sealant consisting of a silicone gel on both sides of the core material consisting of an org.-fiber reticular woven fabric and integrating the laminate utilizing also the adhesion of the sealant. Accordingly, the airtightness of the gasket is attained only by tightening a machine screw on the downstream side of the filter, and the airtightness between the duct chamber and air filter is sufficiently secured.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method of attaching an air filter to a chamber.

[0002]

2. Description of the Related Art Conventionally, for example, a method shown in FIG. 6 has been used to attach an air filter to a chamber. 6 (a) is a cross-sectional view showing an attached state of the air filter, and FIG. 6 (b) is an enlarged view of a portion B in FIG. 6 (a). That is, the filter frame c that hermetically surrounds the outer periphery of the filter 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 stud bolts is tightened. The filter mounting bracket g is fastened to the air filter a. still,
The one shown in the figure applies the method of attaching the air filter to the attachment of the air filter in the blowing device with a built-in filter.
After that, clean air is blown into the clean room j through the air filter a in the chamber e. The peripheral wall of the chamber e extends downward, and a ceiling mounting frame n for fixing the chamber e to the opening m of the ceiling plate k is provided at the end of the peripheral wall of the chamber e. Ceiling board k with perforated board mounting screw r via q
It is fixed to. The peripheral edge of the gasket q is sealed with a sealing material s.

[0003]

When the gasket used in the above conventional method is a closed cell gasket such as chloroprene rubber, the airtightness is maintained by compressing it to a thickness of about 1/2 with a tightening bolt or the like. However, in the long term, due to the restoring force of the rubber material, the pressure bonding force is reduced and the hermeticity is reduced, so that proper tightening is required. Also, the gasket can be cut out, and the airtightness can be improved by filling the groove formed therein with the viscoelastic sealing material, but since it is mixed and used on site during the encapsulation work of the viscoelastic sealing material, For example, if the work site is in an atmosphere of acid gas or the like, the sealing material will not be sufficiently solidified and the airtightness will deteriorate, and the sealing material will be used when the air filter is removed from the air filter mounting frame when the filter is replaced. However, there is a problem that the sealing material needs to be wiped off and the number of working steps increases.

Further, in the case of the conventional stud bolt type tightening, there is a risk of leakage on the downstream side because there is a bolt penetrating portion on the upstream side, so it is necessary to seal the bolt penetrating portion of the filter mounting frame with a sealing material. There was a problem that the number of work processes increased.

[0005]

Means for Solving the Problems As a result of intensive studies by the inventor of the present invention in order to eliminate such inconveniences, in the case where an air filter is pressure-bonded and fixed through gaskets having viscoelastic sealing material layers on both sides of a core material. In the present invention, the inventors have found that the air filter can be fixed with sufficient airtightness even with a weak crimping force, and have completed the present invention. An air filter for crimping and fixing a filter frame of an air filter to an air outlet of a chamber through a gasket. The attachment method is characterized in that a gasket having viscoelastic sealing material layers on both surfaces of a core material is used as the gasket. In this case, the upper end surface of the filter frame of the air filter may be fixed by pressure to the air outlet of the chamber via the gasket.
The air outlet may be formed in a part of the duct chamber, or may be formed by a filter mounting frame provided in the chamber. Further, a fixing member protruding outward is provided on the lower end side of the filter frame of the air filter, and the fixing member is crimped and fixed to the lower surface of the filter mounting frame forming the air outlet through the gasket. Alternatively, the air filter may be mounted and fixed on the lower end surface of the filter frame via the gasket on the filter mounting frame forming an air outlet.

As the core material constituting the gasket, it is preferable to use a mesh made of organic fibers, inorganic fibers or the like, woven cloth or non-woven cloth, and viscoelastic sealing materials provided on both sides of the core material. It is preferable that the structure has a void having a degree of being integrated with each other and has a high flexibility.

The viscoelastic sealing material is not particularly limited as long as it is a sealing material having viscoelasticity. For example, adhesive strength and cushioning as disclosed in JP-A-59-193112. A jelly-like sealing material obtained from a viscoelastic body such as a silicone gel having elasticity (elasticity) is preferable.

Further, it is preferable that a release material such as release paper is laminated on the viscoelastic sealing material to protect the viscous surface of the sealing material before use.

Further, it is preferable that the gasket is attached to the filter frame of the air filter in advance, and in this case also, it is preferable to protect the adhesive surface on the opposite side of the attachment surface to the filter frame.

The thickness of the gasket is 2 to 4 mm.
Sufficient airtightness can be obtained even with a thin plate-like material.

The gasket has the following features. (1) The viscoelastic sealing material is integrated by the adhesiveness via the core material, and a high sealing effect is exhibited in the entire gasket. Further, the viscoelastic sealing material, which has been difficult to handle, is integrated while maintaining its shape due to the presence of the core material, so that it can be attached to and removed from the adherend very easily. (2) Compared with conventional chloroprene rubber, etc., the viscoelastic sealing material does not need to be clamped and pressure-bonded, and the airtightness can be maintained even with a weak pressure-bonding force. Since it suffices to press against the filter mounting frame or the like and fix it with screws, the stud bolt system as in the past is not necessary. Therefore, the air passages on the upstream side and the downstream side of the filter only need to be between the filter frame and the air outlet, and the airtightness is maintained through the viscoelastic sealing material during this period, so that there is no risk of leakage.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a method for mounting an air filter of the present invention will be described with reference to the drawings. FIG.
FIG. 1A is a sectional view showing a mounting state according to the present embodiment, and FIG. 1B is an enlarged view of a B portion of FIG. 1A. In the figure, reference numeral 1 denotes a ceiling plate, a duct chamber 2 is provided along the lower surface of the ceiling plate 1, an air blowout port 3 is provided in the duct chamber 2, and a gasket 4 is provided in the air blowout port 3. The air filter 5 is fixed by pressure.

The gasket 4 comprises a core material made of a net-woven cloth made of organic fibers, and a plate-like viscoelastic sealing material made of silicone gel laminated on both sides of the core material. It was obtained by integrating them.

In the illustrated example, a filter fixing fitting receiver 6 made of a channel material is attached near the air outlet 3 provided on the lower surface of the duct chamber 2, and is attached to the lower end of the filter frame 7 of the air filter 5. By fixing the filter fixing metal member 8 made of a channel material to the filter fixing member receiver 6 with the screw 9, the air filter 5 is fixed to the air outlet 3 by pressure.

In the above embodiment, the perforated plate 10 is attached to the downstream side of the air filter 5 with the screw 11 by utilizing the filter fixing bracket receiver 6. In the figure, 12 indicates a cover.

As described above, according to this embodiment, the airtightness of the gasket can be obtained only by the screw fastening on the downstream side of the air filter, and the airtightness between the duct chamber and the air filter can be sufficiently secured. To be done.

FIGS. 2 and 3 show other embodiments, respectively. In the above-mentioned embodiments, an air filter is attached to the air outlet 3 provided in the duct chamber 2. In the chamber 2
The air filter 23 is attached to the air outlet 22 formed by the filter attachment frame 21 provided in the zero. In the figure, reference numeral 24 is a filter mounting metal fitting, 25 is a filter mounting metal fitting receiver provided in the chamber 20, 26 is a screw, and 27 is a gasket having the same structure as that of the above-mentioned embodiment. As described above, also in each of the above-described embodiments, a sufficient seal can be obtained only by screwing.

FIGS. 4 and 5 show further other embodiments. In each of the above-described embodiments, the upper end surface of the filter frame is crimped and fixed to the air outlet of the chamber through a gasket. In the embodiment shown in FIG. 4, the fixing member 35 protruding outward is attached to the lower end of the side surface of the filter frame 34 of the air filter 33, and is provided to form the air outlet 32 on the inner peripheral surface of the chamber 30. The lower surface of the filter mounting frame 31 is brought into contact with the lower surface of the filter mounting frame 31 via the gasket 37 having the same structure as described above, and the tightening member 40
It was made to fix by pressure. This tightening member 4
0 is composed of a pop rivet 41 provided on the upper surface of the filter mounting frame 31, a pressing plate 42 for pressing the fixing member 35 against the filter mounting frame 31, and a screw 43 for tightening the pressing plate 42 to the pop rivet 41. ing.
Also in this embodiment, a sufficient seal can be obtained only by screwing.

Further, in the embodiment shown in FIG. 5, a gasket 37 having the same structure as that of the above embodiment is provided on the filter mounting frame 31 provided for forming the air outlet 32 in the chamber 30. The air filter 33 is mounted and fixed on the lower end surface of the filter frame 34. In this embodiment, the airtightness of the gasket is obtained and the sufficient sealing is obtained only by the weight of the air filter placed on the filter mounting frame.

[0020]

According to the air filter mounting method of the present invention, a leak is completely prevented only by pressure crimping and fixing by using a viscoelastic gasket without using the conventional tightening and crimping and fixing type stud bolts. Able to install an air filter. Further, if a gasket is attached to the filter frame in advance, the sealing work becomes unnecessary and the work man-hour can be reduced. Further, since the viscoelastic sealing material is used as a gasket, even if the air filter mounting surface has irregularities, it becomes a cushioning material and the airtightness is not deteriorated. Further, even when the filter is replaced, the sealing material does not remain on the mounting frame, so that the mounting frame need not be wiped off.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an attached state of an air filter according to an embodiment of an air filter attaching method of the present invention.

FIG. 2 is a cross-sectional view showing an attached state of an air filter according to another embodiment.

FIG. 3 is a cross-sectional view showing an attached state of an air filter according to still another embodiment.

FIG. 4 is a cross-sectional view showing an attached state of an air filter according to still another embodiment.

FIG. 5 is a cross-sectional view showing an attached state of an air filter according to still another embodiment.

FIG. 6 is a cross-sectional view showing an attachment state of an air filter by a conventional attachment method of an air filter.

[Explanation of symbols]

 1 Ceiling Plate 2 Duct Chamber 3 Air Blowout 4 Gasket 5 Air Filter 6 Filter Fixing Bracket Receptor 7 Filter Frame 8 Filter Fixing Bracket 9 Screw 10 Perforated Plate 12 Cover 20 Chamber 21 Filter Mounting Frame 22 Air Blowout 23 Air Filter 24 Filter Mounting Metal fitting 25 Filter mounting metal fitting receiving 26 Screw 27 Gasket 30 Chamber 31 Filter mounting frame 32 Air outlet 33 Air filter 34 Filter frame 35 Fixing member 37 Gasket 40 Tightening member 41 Pop rivet 42 Push plate 43 Screw

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuya Sato 415 Sakunoya, Yuki-shi, Ibaraki Japan Inorganic stock company Yuki factory

Claims (6)

[Claims] 1. A method for mounting an air filter, comprising: fixing a filter frame of an air filter to an air outlet of a chamber through a gasket by pressure bonding, wherein the gasket includes a core material and viscoelastic sealing material layers on both surfaces thereof. A method for mounting an air filter, characterized by using. 2. The mounting method according to claim 1, wherein the upper end surface of the filter frame of the air filter is fixed by pressure to the air outlet of the chamber via the gasket. 3. The mounting method according to claim 2, wherein the air outlet is formed in a part of the duct chamber. 4. The mounting method according to claim 2, wherein the air outlet is formed by a filter mounting frame provided in the chamber. 5. A fixing member protruding outward is provided on a lower end side of a filter frame of the air filter, and the fixing member is crimped and fixed to a lower surface of a filter mounting frame forming an air outlet through the gasket. The mounting method according to claim 1, wherein 6. The mounting method according to claim 1, wherein the air filter is mounted and fixed on a filter mounting frame that forms an air outlet through the gasket at the lower end surface of the filter frame.