JPH0713779Y2 - Element attachment / detachment structure for air filter for clean room - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to an air filter for a clean room, and more specifically to a structure for simplifying attachment / detachment of an element of a vertically installed cylindrical air filter embedded in a ceiling. Is.

[Prior Art] Conventionally, the ceiling-embedded type air filters for a clean room are a square type and a cylindrical type, each of which has its own characteristic. A plurality of filters are arranged according to the size of the room, and An air supply duct is connected to the air supply port to pass the air that is being sent in, and a diffuser plate that evenly diffuses the clean air flowing downward is sent through the outlet face into the room from the ceiling surface. Is customary.

In a vertically installed cylindrical air filter, the element is tightened by a center bolt that is fixed to the center of the upper end plate of the housing and extends downward, the upper end surface and the end plate are crimped gaskets, and the driven gasket on the outer periphery of the lower end flange is fitted to the inner wall of the housing. There is an example in which the and are sealed to prevent mixing of the primary side air, which is the subject of the present invention.

[Problems to be solved by the invention] A tubular element used for a vertically-arranged tubular air filter for a clean room, which is relatively large, is generally fixed to an upper end plate of a housing by a shaft bolt extending downward, A seat cylinder supported by a radial arm is attached to the opening in the center of the lower end plate by tightening the nut, but when cleaning or replacing the element, loosen the nut while supporting a weight of about 5 kg, and support this when attaching. It is difficult for one person to perform the nut tightening work on the stepladder, and even if two people perform it, the footing is bad and the ceiling surface in a narrow area is limited, so maintenance is easy. However, the problem is that it requires a lot of man-hours.

[Means and Actions for Solving the Problems] In order to solve the above problems, the present invention provides that the mounting of the element is performed by pushing the lower end plate into the housing immediately before reaching a predetermined height. When pushing out a plurality of elastic body holding pieces that have been placed, and when the push-opening ends when it reaches a predetermined position, the holding piece is restored to the state of supporting the lower end plate, which is a push-in set type. The holding piece that has a shape that cannot be removed only by pulling the element is lifted by the hook-type diffusion plate to remove it, and the element is pushed open just before that by contacting the bottom of the element, the holding part is released, and it is removed together with the diffusion plate. Since it can be taken out, it eliminates the fastening points for mounting and taking out, and the maintenance is simplified, so even one person can easily work and contribute to the reduction of man-hours. It is possible.

[Embodiment] Based on an embodiment of the present invention, a detailed description will be given below with reference to the drawings.

FIG. 1 shows a main part breakage of the air filter of the present invention showing an installation state in which the air filter is suspended by a suspension bolt.

The housing 1 having the air supply port 2 on the side surface is hung by a hanging bolt 4 at the center of the upper end plate 3 and has an annular shape at a height position where it contacts the back surface of the ceiling plate near the lower end of the outer periphery whose lower end is an opening. The joint flange 5 is fixed, and the upper end plate 3 has a knurled round nut 6 at the center of the upper end plate 3 which can be manually turned from below.
Is rotatably assembled by a retaining snap ring 7 so that the height position can be adjusted from the inside of the housing 1.

An annular groove 10 that opens in the radial direction is provided in the bent portion of the upper closed end plate 9 of the element 8 on the inner peripheral side, and a driven gasket 11 is fitted therein, and the driven gasket 11 abuts on the outer wall of the annular recess of the upper end plate 3 for the housing 1 to some extent. It also seals up and down without any problem.

Further, the lower end plate 12 has an annular opening whose inside is surrounded by the annular material receiving groove 13 and whose upper end is opened at the outer end of the flange portion 14 which projects outward as shown in FIG. 15 is provided and filled with the liquid sealant 16, the annular collar 17 fixed to the inner wall of the housing 1 is fitted, and the element 8 has a depth that can be followed even if the element 8 moves up and down a little. The dimensional tolerance of the height and a slight vertical movement at the time of mounting and removing can be absorbed, and the primary side and the secondary side of the air supply are completely separated together with the driven gasket 11.

As shown in FIG. 2, at the lower end of the inner circumference of the housing 1, elastic body holding pieces 18 shaped to support and hold the outer circumference bottom end of the annular groove 15 at a predetermined height position are provided at six locations at equal inner circumference intervals. When the element 8 is fixed, the holding piece 18 is pushed open by the outer wall of the annular groove 15 when approaching a predetermined height position when the element 8 is mounted, and when the predetermined height position is reached, the pushing open ends and at the same time the holding piece is held. 18 restores to the position of supporting the outer peripheral bottom end of the annular groove 15 and holds the element 8.

Usually, in the case of the push-in method using the elastic body holding piece,
It is common to release the holding part by pulling what is pushed in and take it out, but as in the embodiment of the present invention, the weight is around 5 kg in a relatively large element 8 and therefore only pulling is necessary. With a holding piece with a shape that can be taken out with, the pressure on the primary side due to clogging in addition to the weight cannot withstand,
Since the holding part may come off and fall during operation, the second
As shown in FIGS. 3 and 4, it is necessary to have a shape capable of sufficiently supporting. Therefore, when removing the element 8, a holding piece
A tool for releasing the holding of 18 is required, but a diffusing plate 19 for evenly diffusing the excess air into the room 19
Is arranged on the lower side of the element 8, and in order to be used also as a tool, a flat surface widened to approximately the same as the outer peripheral diameter of the lower end plate 12 of the element 8 is provided, and the outer peripheral portion is formed as a collar bent downward, As shown by the phantom line in the figure, the holding piece 18 is pushed open just before abutting by pressing it against the lower end plate 12,
Since the element 8 falls under its own weight when the holding part is released, it can be taken out together with the diffuser plate 19. Also, as shown in FIG. 4, the diffuser plate 19 can be attached only by lifting it. The pieces 21 are fixed at six locations at equal intervals around the periphery, and are placed on the six stopper screws 22 fixed near the lower end of the inner wall of the housing 1 at each center of the circumferential distance of the holding piece 18.

The bolt 23 fixed to the center of the diffuser plate 19 tightens and attaches the outlet face 24, which comes into contact with the ceiling surface, with the wing nut 25, so that the placed diffuser plate 19 is not removed.

[Effect of the device] After the installation work of the ceiling embedding, the push-in mounting of the element including the adjustment of the housing height position, the diffuser plate mounting, and the outlet face mounting are performed from below the ceiling without using a tool.
In addition, it can be done by a person, and when removing the element in the push-in set type, the diffusion plate that is mounted and attached is removed, and by pressing it against the bottom of the element as a removal tool, the holding by the holding piece is released and it can be easily taken out. Even though the air filter is relatively large due to simplification of maintenance, it can contribute to a significant reduction in man-hours by being handled by a single operator from below the ceiling surface.

An embodiment according to the present invention has been described below, but it goes without saying that the present invention is not limited to this, and various changes and modifications can be made based on the claims.

[Brief description of drawings]

FIG. 1 is a fragmentary sectional view showing an installed state of an air filter according to an embodiment of the present invention, FIG. 2 is a partial sectional view showing a mounted state in which the element is held by a holding piece, and FIG. FIG. 4 is a partial perspective view showing a hooking piece fixed to the diffusion plate according to the embodiment. 1: Housing, 3: Upper end plate, 6: Round nut, 8: Element, 12: Lower end plate, 15: Annular groove, 18: Holding piece, 19: Diffusion plate,
21: hanging piece, 24: outlet face, 25: wing nut,

Claims (1)

[Scope of utility model registration request] 1. A vertically mounted cylindrical air filter of a ceiling-embedded type having an air supply port on a side surface, a center of an upper end plate is hung by a hanging bolt, and a cylindrical element is mounted in a housing having an opening at a lower part. An air filter device for a clean room in which a diffuser plate that evenly diffuses excess clean air flowing downward in the center is provided to the lower side of the element, and a blowout face is arranged so as to abut the ceiling surface so as to cover the element. By pushing in, a plurality of elastic body holding pieces fixed to the inner wall of the housing are pushed open, and the lower end plate is held in a push-in set type, and when taking out, it is bent to an outer circumference almost equal to the outer diameter of the lower end plate. It is characterized in that the holding plate is pushed open just before abutting by removing the diffuser plate with the element and pressing it against the bottom of the element so that the element can be taken out together with the diffuser plate. Element removable structure of the clean room for Eafuiruta to.