JP2000356002A - Fall prevention device for fan filter unit - Google Patents

Abstract

(57) [Summary] [Problem] To simplify the work with a simple structure so that the fan filter unit installed on the ceiling of a clean room etc. does not fall due to earthquake vibration etc. Provided is a fall prevention device for a fan filter unit. SOLUTION: A fan filter unit is arranged and placed on a ceiling lattice frame suspended from a ceiling or a structure of a building, and a suppression plate is disposed on an upper portion of an adjacent fan filter unit, and a connection bolt is connected to the suppression plate. Thus, the fan filter unit is integrated with the locking member to prevent the fan filter unit from falling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing falling of a fan filter unit, and more particularly, to a device for preventing falling of a fan filter unit which is arranged side by side on a ceiling of a clean room or the like and is cleaned by replacing air in a room by rotation of a fan. About.

[0002]

2. Description of the Related Art Conventionally, with the development of computers, the necessity of improving air cleanliness inside factories that manufacture semiconductor products or related precision / electronic parts has increased, and clean rooms have been installed in various parts of the country. It was started. In general, the necessity of improving the air cleanliness also increases in a factory controlled by a computer or an office where a large-sized computer is installed.
A fan filter unit 61 as shown in FIG.
A system ceiling type clean room in which a filter unit 61 is installed has been adopted.

[0003] In FIG. 6, a filter unit 61 comprises:
A filter 63 having a rectangular box shape, a body case 65 laminated on the filter 63 and having a hollow box shape smaller than the filter 63, an electric motor 67 housed inside the body case 65, and And a fan 69 driven by an electric motor 67. Filter unit 61
The fan 69 for flowing air is driven by the electric motor 67. The flown air flows through the inside of the filter 63 and is cleaned and discharged outside the filter unit 61.

FIGS. 7 and 8 are schematic views showing an example in which a filter unit 61 is installed in a conventional system ceiling type clean room. The system ceiling type clean room includes a filter unit 61 and a ceiling grid frame 71.
And a fluorescent lamp 73, a ceiling grid rod 75, and
It consists of a ceiling grid nut 77. In this example,
A portion of a ceiling grid rod 75 is welded to and suspended from a grooved steel beam 81 (hereinafter referred to as a ceiling 81). A ceiling grid frame 71 having a lip grooved steel shape is attached to the ceiling grid rod 75 by a ceiling grid nut 77. A fluorescent lamp 73 is fitted into the lip-groove-shaped steel ceiling grid frame 71, or is attached by a screw (not shown).

The filter units 61 are arranged side by side at predetermined intervals on a ceiling grid frame 71 attached to a ceiling grid rod 75 suspended from a ceiling 81. In the first conventional example shown in FIG. 7, a steel material 85 that is long in the horizontal direction in the drawing is disposed above the filter units 61 that are arranged and placed. The steel material 85 is attached to a drop prevention rod 89 which is separately suspended from an anchor 87 attached to the ceiling 81. In the first conventional example, the spring 85 of the filter unit 61 due to an earthquake or the like is suppressed by the steel material 85, and the filter unit 61 is prevented from being inclined and dropped through the ceiling lattice frame 71.

In the second conventional example shown in FIG. 8, a wire rope 93 attached between the two walls 91a, 91b and the like is arranged above the filter units 61 arranged side by side. . The steel wire rope 93 is tensioned by a turnbuckle 95. In the second conventional example, the spring of the filter unit 61 due to an earthquake or the like is suppressed by the tension of the wire rope 93 to prevent the filter unit 61 from dropping.

[0007]

However, in the first prior art shown in FIG. 7 described above, it is necessary to provide an anchor for attaching a drop prevention rod to the ceiling in advance. Enormous man-hours to perform
Costly. Further, after the fan filter units are placed side by side on the ceiling lattice frame, it is difficult to attach the steel material to the drop prevention rod. In addition, it is preferable that the weight of the steel material is not applied to the fan filter unit in order to prevent breakage of the fan filter unit. For this reason, it is necessary to adjust the clearance between the steel material and the fan filter unit. However, this operation is more difficult. There is a problem that it falls after passing through.

In the second conventional example shown in FIG. 8, it is necessary to make a hole for a wire rope in an existing wall or the like, and there is a problem in that the strength of the body such as the wall or the like is not sufficient, so that the wire rope cannot be stretched strongly. Also, when the number of fan filter units installed is large, the interval between the wire ropes is long, and the holding force of the wire ropes in the central portion is weak in the vertical direction. For this reason, at the time of vibration such as a large earthquake, there is a problem that the suppression of the fan filter unit at the center becomes insufficient. In addition, if the fan filter unit falls due to an earthquake or the like, expensive equipment provided thereunder is damaged, which makes production impossible and increases the cost of damage.

The present invention is directed to a device for preventing a fan filter unit from falling, focusing on the above-mentioned conventional problems, and in particular, to prevent a fan filter unit provided on a ceiling of a clean room or the like from falling due to earthquake vibration or the like. It is an object of the present invention to provide a fan filter unit drop prevention device which can be easily integrated into a fan filter unit with a simple structure and can suppress a drop.

[0010]

In order to achieve the above object, a first invention of a fall prevention device for a fan filter unit according to the present invention is provided on a ceiling lattice frame suspended from a ceiling or a structure of a building. The fan filter units are arranged side by side, and the suppression plate is arranged on the upper part of the adjacent fan filter unit, and the suppression plate is connected to the locking member by connecting bolts to integrate the fan filter unit, and the fan filter unit is integrated. It is designed to prevent falling. Preferably, the suppression plate is connected to the ceiling lattice frame. Further, the suppression plate is preferably connected to a member attached to the fan filter unit. Further, it is preferable that a locking member is inserted into a transporting dent provided on a side surface of the fan filter unit, and that the locking member is grooved steel.

[0011]

According to the above construction, the box-shaped fan filter units placed side by side on the ceiling lattice frame have the suppression plates placed on both upper surfaces of the adjacent fan filter units, and the suppression plates are provided with It is connected and integrated with the locking member. This locking member is, for example, a ceiling lattice frame, and is connected to the restraining plate by a connecting rod. The fan filter unit is sandwiched between the suppression plate and the ceiling lattice frame via the connecting rod, and is integrated to suppress the vibration of the fan filter unit. Thereby, even if the fan filter unit receives vibration such as an earthquake, the fan filter unit does not jump up and is prevented from falling through the ceiling lattice frame. The connecting rod can be attached and adjusted from above the fan filter unit or from below the ceiling lattice frame.

In the same manner as described above, the suppression plates are mounted on both upper surfaces of the adjacent fan filter units, and the suppression plates are connected to the engaging members provided on the fan filter units. I have.
For example, a locking member is inserted into a recess provided in the fan filter unit, and the suppression plate and the locking member are connected by a connecting rod. The fan filter unit is sandwiched and integrated between the suppression plate and the locking member via the connecting rod, and suppresses the vibration of the fan filter unit. Thus, even if the fan filter unit is subjected to vibration such as an earthquake, the fan filter unit is prevented from dropping through the ceiling lattice frame because the individual fan filter units do not jump up. At this time, the dent provided on the side surface of the fan filter unit is a handle provided for transportation, and if the locking member inserted into the dent is a grooved type steel, the dent is easily caught by the handle and becomes difficult to be removed, and the fan Even if the filter unit is subjected to vibration such as an earthquake, the filter unit does not further fall through the ceiling lattice frame. The connecting rod can be attached and adjusted from above the fan filter unit or from below by providing holes in the ceiling grid frame.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a fan filter unit fall prevention device according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing a partial configuration of a first embodiment of a system ceiling type clean room using a fall prevention device 1 for a fan filter unit, and FIG. 2 is a first embodiment of the fall prevention device 1 for a fan filter unit. FIG. In the following, the same components as those of the related art are denoted by the same reference numerals, and description thereof is omitted.
In FIG. 1, as in the conventional example, the filter unit 61
Is a ceiling grid rod 75 suspended from the ceiling 81
Are placed side by side on the ceiling lattice frame 71 attached at a predetermined interval. Adjacent filter unit 61
Are the filter units 61 sequentially from the left side in the drawing, for example.
a, 61b, 61c,..., and between the filter units 61, the fall prevention device 1 connected to the ceiling lattice frame 71 is arranged.

In FIG. 2, a fall prevention device 1 includes a first nut 5 for attaching a ceiling lattice frame (hereinafter, referred to as a first nut 5).
, A connection screw bar 7, a holding nut 9, and a suppression plate 11. Further, a washer 13 having a hole 13a to be inserted into the connection screw rod 7 may be provided between the holding nut 9 and the suppression plate 11. At this time, the hole 13a of the washer 13 reduces the clearance between the connection screw bar 7 and the washer 1 with the holding nut 9.
Alternatively, the suppression plate 11 may be pushed over a wide range via 3.

The first nut 5 serving as a locking member is accommodated in a nut mounting box 71a provided above a ceiling lattice frame 71 having a lip grooved steel shape. Nut mounting box 7
1a is provided with a hole 71b into which the connecting screw rod 7 is inserted. The first nut 5 includes filter units 61a, 6
1b, 61c,...
It is attached to multiple places.

The connecting screw rod 7 is provided with a thread 7a formed at a part of both ends or over the entire length. Suppression plate 1
Reference numeral 1 denotes a width (La) larger than that between the adjacent filter units 61a and 61b, and
It is formed of a rectangular plate or a disk that suppresses a and 61b with a certain width (Lb). A hole 11a through which the connecting screw rod 7 penetrates is provided at the center of the suppression plate 11.
Has been opened. Thereby, the suppression plate 11
The connecting screw bar 7 is inserted into the hole 11a and is placed on the upper surfaces of the filter units 61a and 61b. The suppression plate 11 can suppress the filter units 61a and 61b with a certain width (Lb) or more in any direction.

The operation of the first embodiment of the fall prevention device 1 for the filter unit 61 of the first embodiment constructed as described above is as follows. In FIG. 2, first, the filter units 61 are placed side by side on the ceiling lattice frame 71 at predetermined intervals. Next, the connecting screw bar 7 is screwed and fixed to the first nut 5 which is a locking member. The suppression plate 11 is inserted into the connecting screw bar 7, and the suppression plate 11 is placed over both filter units 61a and 61b. The holding nut 9 is screwed and attached to the connecting screw rod 7 and stopped at a position where it comes into contact with the suppression plate 11.
At this time, the suppression plate 11 is
The a and 61b may be stopped in a state where there is no pressing force only by abutting the ceiling lattice frame 71, or may be pressed by a constant force. At this time, the connecting rod can be attached and adjusted from above the fan filter unit. Thereby, the fan filter units 61a, 61
Since the b, 61c,... are integrated, an earthquake occurs, and even if the vibration acts on the filter unit 61, the filter unit 61 does not jump up and is prevented from falling through the ceiling lattice frame. Is done.

FIG. 3 is a partially enlarged side view of a second embodiment of the fall prevention device 1A of the filter unit 61. In addition,
In the following, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 3, the fall prevention device 1A is
As in the embodiment, a connecting screw bar 7, a holding nut 9,
And a suppression plate 11. The holding nut 9 is a lip grooved steel shaped ceiling lattice frame 71A.
Are screwed into the connecting screw bar 7 and stored. The ceiling lattice frame 71A has a hole 71c into which the connection screw bar 7 is inserted. Holding nut 9, fall prevention device 1
A represents filter units 61a, 61b, 61c,.
Are mounted on the ceiling lattice frame 71A at a plurality of positions in accordance with the mounting of In FIG. 3, in the fall prevention device 1 </ b> A, the holding nut 9 is provided on the suppression plate 11 with a certain clearance (S
Stop at the position having the condition a). At this time, even if two restraining nuts 9 are used, one of which is used as a lock nut, and the restraining nut 9 is stopped with a clearance (Sa) between the restraining nut 9 and the restraining plate 11. good.
The other parts are the same as those in the first embodiment, and a detailed description thereof will be omitted.

FIG. 4 is a partial side view of a third embodiment of a fall prevention device 1B of a fan filter unit with handle 61A (hereinafter referred to as a filter unit with handle 61A). FIG. 5 shows a partially enlarged side view of the third embodiment of the fall prevention device 1A of the filter unit with handle 61A.
4 and 5, the filter unit 6 with a handle is used.
1A shows a rectangular box-shaped filter 63 and a filter 6
3, an electric motor 67 (shown in FIG. 6) housed inside the main body case 65A with a handle, which is formed in a hollow box shape smaller than the filter 63, and is housed inside the main body case 65A with the handle. And a fan 69 (shown in FIG. 6) driven by the electric motor 67.

The filter unit with handle 61A has handles 31 for transportation on both sides of the main body case 65. The handle 31 is a filter unit with a handle 61A.
Are formed as U-shaped depressions on a part of both side surfaces of. U
The character-shaped depression is provided upward so as to be easily gripped during transportation. In other respects, the configuration is the same as that of the filter unit 61, and a detailed description thereof will be omitted. The filter unit with handle 61A is provided with the ceiling 8 as described above.
On the ceiling grid frame 71B attached to the ceiling grid rods 75 suspended from the ceiling grid frame 71, they are placed side by side at a predetermined interval. Adjacent filter unit with handle 61
In FIG. 4A, for example, in FIG. 4, filter units 61Aa, 61Ab, 61Ac,... Are sequentially arranged from the left, and a fall prevention device 1B is arranged between each filter unit 61.

In FIG. 5, the fall prevention device 1B includes a locking member 33, a connecting screw bar 7A, a holding nut 9, and a suppression plate 11. Also,
A washer 13 having a hole 13a to be inserted into the connecting screw bar 7A may be provided between the holding nut 9 and the locking member 33. At this time, the gap 13a of the washer 13 may reduce the gap between the hole 13a and the connecting screw bar 7, and the retaining member 33 may be pushed by the holding nut 9 via the washer 13 in a wide range.

Although the locking member 33 is shown as a grooved steel shape in the drawing, it may be a flat plate shape. In the illustrated steel shape with a groove, since the handle 31 is provided upward in the U-shape of the handle 31, the handle 31 is provided at the protrusion (Pa) of the recess.
And the fan filter unit is integrated, so that even if it is subjected to vibration such as an earthquake, it will not fall through the ceiling lattice frame 71B. The ceiling lattice frame 71B has a light rectangular steel shape shown in FIG. 2 or a lip grooved steel shape shown in FIG. 3, and a hole for rotating the lower holding nut 9 in the light rectangular steel or the lip grooved steel. 35
May be provided.

In the above-described embodiment, the fall prevention device 1 is disposed between the filter units 61 adjacent to each other in the horizontal direction as shown in FIG. 1, but as shown by a dashed line in FIG. May be provided with a fall prevention device Ma, and four filter units 61 as shown by a two-dot chain line.
A fall prevention device Na may be provided between the two. Further, the locking member may be an accessory protruding above or from the side of the filter unit 61, for example, a handle, or a clip such as a wire connection.

[0024]

As described above, according to the present invention, since the suppression plates are mounted on both upper surfaces of the adjacent fan filter units, and the suppression plates are connected to the ceiling lattice frame by the connection rods, the fan filter This suppresses the unit from vibrating. Thereby, even if the fan filter unit is subjected to vibration such as an earthquake, the fan filter unit does not jump up and is prevented from falling through the ceiling lattice frame by a simple structure. Further, even in an existing system ceiling type clean room, it is possible to inexpensively attach the fall prevention device by an easy additional operation. Further, since the connecting rod can be attached and adjusted from above the fan filter unit or from below the ceiling lattice frame, it is possible to easily attach the fall prevention device of the fan filter unit.

Further, the suppression plate placed on both upper surfaces of the adjacent fan filter units and the suppression plate inserted in the recess provided on the side surface of the adjacent fan filter unit are connected by a connection rod, and the fan Vibration of the filter unit is suppressed. This prevents individual fan filter units from jumping up even when subjected to vibration such as an earthquake, and prevents them from passing through the ceiling lattice frame and falling. At this time, if the depression provided on the side surface is the handle provided for transportation, and if the holding plate is a grooved steel, the depression is easily caught by the handle and difficult to remove, and the fan filter unit receives vibrations such as earthquakes. However, it does not fall further after passing through the ceiling lattice frame. The connecting rod is above the fan filter unit,
Alternatively, since the ceiling lattice frame can be attached from below by providing holes, the attachment work of the fall prevention device of the fan filter unit can be easily performed. In addition, since the fan filter unit does not drop due to an earthquake or the like, expensive equipment disposed below is not damaged,
Production will not be disabled.

[Brief description of the drawings]

FIG. 1 is a partial structural perspective view of a first example of a system ceiling type clean room using a fan filter unit fall prevention device according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of a first example of the fall prevention device for the fan filter unit according to the embodiment of the present invention.

FIG. 3 is a partially enlarged side view of a second example of the fall prevention device for the fan filter unit according to the embodiment of the present invention.

FIG. 4 is a partial configuration side view of a third example of the fall prevention device for the fan filter unit with the handle according to the embodiment of the present invention.

FIG. 5 is a partially enlarged side view of a third example of the fall prevention device for the filter unit with the handle according to the embodiment of the present invention.

FIG. 6 is a side view of the fan filter unit.

FIG. 7 is a partial side view of a first conventional example of a fall prevention device for a fan filter unit according to a conventional embodiment.

FIG. 8 is a side view of a part of a second conventional example of a device for preventing a fan filter unit from falling according to a conventional embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A Fall prevention device of fan filter unit 5 First nut (locking member) for ceiling grid frame 7 Connecting screw rod 9 Suppression nut 11 Suppression plate 13 Washer 31 Handle 33 Locking member 61 Fan filter unit 61A With handle Fan filter unit 63 Filter 65 Body case 65A Body case with handle 67 Electric motor 69 Fan 71, 71A, 71B Ceiling lattice frame 71a Nut mounting box 75 Rod for ceiling lattice 81 Ceiling

Claims (4)

[Claims] 1. A fan filter unit is arranged and mounted on a ceiling grid frame suspended from a ceiling or a structure of a building, and a suppression plate is disposed above an adjacent fan filter unit and connected to the suppression plate. A fall prevention device for a fan filter unit, wherein the fan filter unit is integrated with a locking member by bolts to prevent the fan filter unit from falling. 2. The fall prevention device for a fan filter unit according to claim 1, wherein the suppression plate is connected to a ceiling lattice frame. 3. The fall prevention device for a fan filter unit according to claim 1, wherein the suppression plate is connected to a member attached to the fan filter unit. 4. The dropping of the fan filter unit according to claim 3, wherein a locking member is inserted into a transporting recess provided on a side surface of the fan filter unit, and the locking member is grooved steel. Prevention device.