JP2003328494A - Lighting equipment for clean room - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To secure an effective height in a clean room room and hold a ceiling filter material in a stable state to secure sufficient illuminance and airtightness and a stable air flow distribution of clean air, and to provide a pipe. To facilitate maintenance such as ball replacement. SOLUTION: The ceiling frame member 11 is vertically and horizontally arranged at predetermined intervals at a ceiling surface position in a clean room, and is formed along the longitudinal direction of the member on the inner surface of an upper flange of a ceiling frame member 11 having an open lower surface in cross section. At an arbitrary position of the female screw formed along the groove side surface of the grooved flange 15, the lighting fixture body 20 is provided.
The lighting fixture main body 20 is housed and held at an arbitrary position in the ceiling frame member 11 by screwing a frame 40 holding a part of the lighting fixture body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for a clean room, which can more effectively secure the height of the room, hold the ceiling filter material in a stable state, obtain sufficient illuminance, and sufficiently seal it. The present invention relates to a clean room lighting fixture incorporated in a ceiling structure of a clean room that secures a high degree and a stable air flow distribution of clean air and can easily perform maintenance work such as replacement of a ceiling filter and lighting from below.

[0002]

2. Description of the Related Art Generally, a high-performance filter material is attached to the ceiling of a clean room to clean the indoor air, while sufficient illuminance and good lighting are provided for safe work inside the clean room. Lighting equipment that can maintain the condition is selected. That is, as the ceiling structure for a clean room, while reliably holding the ceiling filter material composed of the ultra-high performance filter of the air cleaning system, dust is unlikely to accumulate in the ceiling structure itself,
It is required to have excellent airtightness and easy maintenance. In addition, the relationship with the flow of clean air flowing down from the filter material into the room must be taken into consideration.

FIG. 13 is a partial sectional view showing an example of a lighting fixture provided in a conventional ceiling structure of a clean room. As shown in the figure, in a conventional ceiling structure 50 of a clean room, a ceiling frame 52 made of an aluminum shaped material suspended from an upper floor slab (not shown) or a ceiling beam material by suspension bolts 51 is vertically and horizontally arranged. Furthermore, equipment boxes 55 that support the lighting equipment are attached at predetermined intervals. The ceiling filter material 53 such as a HEPA filter has its edges supported along the shoulders of these ceiling frames 52. At this time, the two-lamp type lighting fixture 60 shown as an example is arranged to face the bottom surface (ceiling surface) of the equipment box 55. In this case, a part of the air flow of the clean air flowing down from the ceiling filter material 53 is, as illustrated, the bottom width (α) of the equipment box.
On the other hand, a turbulent flow region having a substantially triangular prism shape in cross section is generated in the longitudinal direction in which the lighting fixture is arranged up to the lower side (α × 3). For this reason, there is a possibility that the cleanliness required for the clean room may not be secured.

Therefore, in order to solve this problem, FIG.
There is also an example in which the one-lamp type fluorescent tube as shown in FIG. 4 is directly attached to the lower surface of the ceiling frame. The ceiling frame 52 used here has a predetermined rigidity on the upper surface of a □ -shaped cross section 52a and a nut accommodating and supporting portion 5 of the hanging bolt 51.
2b is a member formed integrally. A groove 52c is formed on the lower surface of the ceiling frame 52 extending in the longitudinal direction along the frame longitudinal direction, and a direct-mounted fluorescent lamp as a lighting fixture 60 is fixedly supported in the groove 52c via a mounting bolt 55. . By mounting a large number of this kind of lighting fixtures 60 along the lower surface of the ceiling frame 52, necessary illuminance and the like in the clean room are secured. Further, at this time, as shown in FIG. 15, the assumed turbulent flow area is (β × 3) with respect to the width β of the ceiling frame 52, so the ceiling frame 52 and the lighting fixture 60 should be placed in this range. Therefore, the air flow of clean air can be made to flow uniformly in the room.

[0005]

However, in the luminaire shown in FIG. 15, since the ceiling frame and the luminaire are aligned in a row and protrude downward, the effective height from the lower surface of the ceiling filter material 53 to the floor is reduced. Will not be partially secured. Further, since the ceiling filter material 53 is designed to be directly placed on the ceiling frame, the flatness of the ceiling surface cannot be ensured unless the ceiling frame is accurately hung by a hanging member such as a hanging bolt, which makes it attractive. There is a risk of discomfort. Further, in order to mount the conventional ceiling filter material so that it is supported by the ceiling frame, the ceiling filter plate material is inclined and pushed into the space behind the ceiling, and then the ceiling filter plate material is held horizontally by the support member or the like. It was For this reason, the height inside the ceiling becomes more necessary, and the work of mounting the ceiling filter plate material becomes large. Further, in the method of pushing up the ceiling filter plate material once into the space above the ceiling and dropping it from above, it is necessary to secure a sufficient space above the ceiling, which makes installation work troublesome and reduces the effective height in the clean room. There is a fear.

Therefore, an object of the present invention is to solve the problems of the above-mentioned conventional techniques, to reliably secure an effective ceiling height in a clean room, to reduce the height inside the ceiling, and to reduce An object of the present invention is to provide a lighting fixture for a clean room that can easily perform maintenance work such as replacement of a ceiling filter plate material and a tube with the number of parts.

[0007]

In order to achieve the above object, the present invention is directed to a ceiling frame member having a cross-sectional shape which is vertically and horizontally arranged at predetermined positions at a ceiling surface position in a clean room and has an open lower surface. By attaching a frame holding a part of the lighting fixture main body to an arbitrary position of the female screw formed along the groove side surface of the groove-shaped flange formed along the member longitudinal direction on the inner surface of the upper flange, The lighting fixture main body is housed and held at an arbitrary position in the ceiling frame profile.

A plurality of frames are screwed into arbitrary positions of the female thread of the groove-shaped flange so as to hold the socket base and the reflector of the luminaire main body at predetermined positions and hold the ballast at other positions. It is preferable to wear.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a clean room lighting device of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partial cross-sectional view showing a part of a ceiling structure 1 in which a clean room lighting device is incorporated. As shown in the figure, the ceiling structure 1 is illustrated indoors at a level where a ceiling frame 11 having a cross-sectional shape in which a lower part is opened and a fluorescent lamp as the lighting fixture body 20 is housed and supported constitutes a ceiling surface. Not suspended from the upper building.
As a plane layout in which the ceiling frame 11 is arranged, there is a plan view shown in FIGS. 3 and 4. A filter unit 4 as a ceiling filter plate member having a plane size substantially equal to an inner size of a space between ceiling frames 11 arranged vertically and horizontally is held via a bracket 6. Ceiling frame 1
As shown in FIG. 1, 1 itself is suspended from a ceiling body (not shown) by a well-known support structure such as suspension bolts 3 arranged at predetermined intervals in the longitudinal direction. At this time, the hanging bolts 3 adjacent to each other are connected by a steady rest 3B. In the present embodiment, HE is used as the filter unit 4.
A type in which a fan unit 8 having the same thickness is integrally laminated on the PA filter 2 is shown. It goes without saying that various types of filter units such as the HEPA filter 2 alone, the fan unit 8 and the fan unit 8 integrally laminated in two stages, and the like can be applied. Further, the ceiling frame 11 and the suspension bolts 3 supporting the filter unit 4 are designed to have a cross-section in consideration of the individual filter unit 4 and an additional load. The left half of FIG. 1 shows the holding state of the filter unit 4 at the intermediate span position of the ceiling frame 11.

[Construction of Ceiling Frame] Lighting Equipment Main Body 20
As shown in FIG. 1, the ceiling frame 11 for accommodating the inside of the ceiling frame 11 has a U-shaped cross section in which the lower side of the main structure portion 11a is opened. 11b is an integrally formed aluminum member. On the other hand, two upper and lower locking claws 12 and 13 are formed along the longitudinal direction on the inner surface side of the opened lower end. The upper locking claw 12 is provided so as to project horizontally, and the lower locking claw 13 is formed in an L-shaped cross section with its tip facing downward.

[Structure of Lighting Fixture] The lighting fixture main body 20 of the present invention is supported by a box-shaped socket base portion 21 having a flat hollow cross section and lower locking claws 13 of the ceiling frame 11, and the box-shaped socket base portion 21 is ceilinged. A base mounting bracket 22 as a mounting member for holding a predetermined position inside the frame 11, a socket 24 mounted on the lower surface of the box-shaped socket base 21 to which the fluorescent tube 23 is mounted, and an upper side and a lateral side of the fluorescent tube 23. It is composed of a reflecting plate 25 for covering and a transparent cover 26 for covering the open surface of the ceiling frame 11 in which the fluorescent tubes 23 are accommodated.

The box-shaped socket base 21 is a bent member made of a thin steel plate having a flat hollow cross section and having a predetermined bending rigidity in the longitudinal direction. A ballast 27 is attached to a position where the fluorescent tube 23 cannot be attached. It is designed to be used. Therefore, as shown in FIG. 1, the dimensions of the base mounting bracket 22 are set so that the ballast 27 does not protrude from the lower surface of the ceiling frame 11. Base mounting bracket 2
Reference numeral 2 is a processed material obtained by bending a strip-shaped spring steel material having a width of 0.8 to 2.0 mm into a substantially U-shape, and the box-shaped socket base 21 is arranged so as to straddle the cross member, and the longitudinal direction of the box-shaped socket base 21. The rivets are fixed to the upper surface of the box-shaped socket base 21 at predetermined intervals. Then, the lower end portion 22 a bent outward is the lower locking claw 13 of the ceiling frame 11.
A box-shaped socket base 21 to which a socket 24 is attached in advance so as to be placed thereon is housed and supported in the ceiling frame 11. In this state, the reflection plate 25 is attached from below the open surface of the ceiling frame 11, and is fixed to the lower surface of the box-shaped socket base portion 21 with attachment bolts 28. Further, using the lower locking claws 13, the ceiling frame 11
A transparent cover 26 is attached from below.

A fluorescent tube 23 constituting the luminaire main body 20,
Off-the-shelf products can be used for the socket 24, the reflector 25, and the ballast 27. For example, a thin HF fluorescent tube 23 (3
2 W, φ25.5 mm) and corresponding parts may be used. As the transparent cover 26, it is preferable to use a transparent acrylic resin plate that has been subjected to antistatic processing.

[Other Configuration of Lighting Fixture] FIGS. 5 and 6 show another configuration of the lighting fixture for a clean room, in which the width of the ceiling frame 11 is widened to facilitate replacement of the fluorescent tube installed inside. In addition, an example is shown in which the base mounting bracket 22 is fixed to the inner surface of the upper flange of the ceiling frame 11 to be housed in the ceiling frame 11. As shown in FIG. 5, in the ceiling frame 11, the main body frame 4 having a groove-shaped cross section along the longitudinal direction.
0 is accommodated, and a reflector mounting bracket 43 is attached to the main body frame 40 at a predetermined interval in the longitudinal direction. The main body frame 40 is further fixed to the groove-shaped flange 15 formed on the inner surface of the flange 11c of the ceiling frame 11 via mounting screws 41. A female screw that can be screwed into the thread of the mounting screw 41 is formed on the groove side surface of the grooved flange 15. As a result, the mounting screw 41 is
It can be screwed into any position of the groove-shaped flange 15 formed along the longitudinal direction. Further, as shown in FIG. 6, a ballast 27 is attached to a predetermined position of the main body frame 40 so as to fit in the internal space of the ceiling frame 11. A socket base portion 42 that supports the socket 44 is also attached to the main body frame 40. Further, a reflection plate 45 is attached to the reflection plate attachment fitting 43 that supports a fluorescent tube (not shown) from the lower surface side with attachment screws 46. The end of the reflection plate 45 is locked by the locking claw 16 protruding from the inner surface of the flange as in the other modified examples, and can be stably stored in the ceiling frame 11.

[Structure of Bracket] The structure of the bracket for supporting the filter unit 4 by the ceiling frame 11 arranged in a lattice on the ceiling surface so as to hold the lighting apparatus of the present invention will be described below. As shown in FIG. 2, the corner bracket 6 that supports the filter unit 4
Are attached to the lattice joint points of the ceiling frame 11 arranged vertically and horizontally. 3 and 4, the mounting position of the corner bracket 6 is shown as an L-shaped symbol. The corner bracket 6 of the present embodiment is a bent stainless steel product, and is attached to the ceiling frame 11 so that the upper flange 6a is hooked on the shoulder portion of the ceiling frame 11. In this state, each corner end of the filter unit 4 is placed on the lower flange 6b so as to close the space between the adjacent ceiling frames 11 to form a ceiling surface. At this time, the corner bracket 6 is supported by the ceiling frame 11 via the sealing material 7 (FIG. 1) whose thickness can be adjusted at the position of the upper flange 6a. Therefore, air leakage from the gap between the frame body 5 of the filter unit 4 and the ceiling frame 11 can be prevented, and the level of the lower surface of the filter that constitutes the ceiling surface can be adjusted to improve the appearance of the ceiling surface. . The lower surface of the ceiling frame 11 orthogonal to the ceiling frame 11 that houses the lighting fixture body 20 is closed by a joint panel 9 made of an aluminum plate.
The sealing material 7 is a resin sealing material that does not generate dust, and is attached to the shoulder portion of the ceiling frame 11 over the entire length in the longitudinal direction of the frame. As shown in FIG.
In the middle position of the, close contact with the frame body 5 of the filter unit 4,
Ceiling frame 1 with corner bracket 6 attached
At the joining point of No. 1, they are adhered so that the thickness of a part of them becomes thin.

[Layout Layout of Lighting Equipment] FIG. 3 shows a ceiling structure in which a filter unit 4 which is supported by being surrounded by a ceiling-shaped ceiling frame 11 which houses a lighting equipment for a clean room is incorporated. FIG. 3 is a diagram showing a part of the layout of the lighting fixtures as viewed from below in the room. In the present embodiment, one HEPA filter 2 is a bracket 6 attached to a grid joining point of an aluminum ceiling frame 11 arranged in a grid in the vertical and horizontal directions.
The corners are supported by. The lighting fixture body 20 is attached to the lower surface of the ceiling frame 11 extending in the longitudinal direction. At this time, the joint panel 9 closes the space between the adjacent lighting fixture bodies 20.
In the ceiling frame 11 at the position of the joint panel 9, a ballast (not shown) arranged in the extension direction with the lighting device main body 20.
Is installed.

On the other hand, in order to increase the illuminance in the room, the luminaire main body 20 is installed in the longitudinal direction of the extending ceiling frame 11.
It is also planned to arrange them continuously as shown in FIG. For that purpose, the ballast 27 should be installed at
It is preferable to position it on the upper surface of the socket base 21 as described above. Further, by making the height of the ceiling frame 11 a sectional shape as shown in FIG. 4, the section modulus of the ceiling frame 11 becomes large, so that the number of suspension points of the ceiling frame 11 can be reduced and the HEPA filter 2 can be made larger. Can cope well. In the present embodiment, the filter unit 4
When performing the attachment / detachment at the time of maintenance, since the filter unit 4 is placed only on the bracket 6, the adjacent filter unit 4 can be easily removed by removing the ceiling frame 11 of the joint.

[Modification of Lighting Fixture] (Modification 1) FIGS. 8 and 9 show a socket in which an elevating mechanism capable of pulling down one end of the socket is incorporated in order to facilitate replacement work of the fluorescent tube 23. The modification 1 which showed the base part 21 is shown. When the fluorescent lamp 23 is completely housed in the ceiling frame 11 as shown in FIG. 1, the fluorescent lamp 23 may be difficult to replace because the gap between the fluorescent lamp 23 and the reflector 25 is narrow. . Therefore, as shown in FIG. 11, one end of the socket base portion 21 can be pulled down when the fluorescent tube 23 is replaced. As shown in FIG. 8, the socket base 21 of the present modification is attached to a predetermined position of the mounting bracket 22 via a locking claw 32 biased by a spring 31 to the base mounting bracket 22. By pushing up 21 slightly, one end of the socket base 21 is pulled down while the locking claw 32 is opened. At this time, since the socket base portion 21 itself is suspended by the suspension pins 33, only one side of the socket base portion 21 can be pulled out from the ceiling surface by a certain amount and held, as shown in FIG. In this state, after exchanging the fluorescent tube 23, the socket base 21 can be lifted to be put in the original position in the ceiling frame 11.

(Modification 2) Each of FIGS. 10A and 10B shows a modification 2 in which not only the work of exchanging the fluorescent tube 23 is facilitated, but also the illumination rate is improved as an exposure type illumination.
The socket 34 of the present modification shown in FIG. 10A has an upper portion 34 a substantially equal to the inner diameter of the case 35 housed inside the mounting member 22, and is housed in the spring housing hole 34 b formed in the socket 34. It is housed in the case 35 so as to resist the compression spring 36, and its position is held by the stopper pin 37 attached to the side surface. The lower end of the stopper pin 37 engages with the lower end flange 35a of the case 35, thereby preventing the socket 34 from protruding downward. At this time, a locking release hole 38 is formed in the lower end flange 35a. By inserting a wire-like releasing / opening jig (not shown) into the locking / releasing hole 38, the stopper pin 37 is urged inward, and the locking between the lower end of the pin and the lower end flange 35a is released. The urging force of the socket exposes the bulb attachment portion of the socket 34 from the open end of the lower end of the case 35 (FIG. 10B). By using as illumination in this state, the illumination rate can be improved.

(Modification 3) In FIG. 11, the thickness of the socket base 21 is increased by enlarging the hollow cross section of the box-shaped socket base 21 so that part of the socket 24 is projected from the lower surface of the ceiling frame 11. The modified example 3 is shown. In this case, the lower half of the fluorescent tube 23 is the ceiling frame 11
The transparent resin cover 26 that projects from the lower surface and covers it also has a convex curved surface shape as shown in the figure. The cross section of the cover is H
Various curved shapes, surface patterns, and cover materials can be set as long as they have a shape that takes into account the flow of clean air that passes through the EPA filter and flows down into the room. For example, it is also preferable to use a color panel for the cover to prevent ultraviolet rays and adopt a surface pattern for preventing glare. Further, as shown in FIG. 12, the louver 28 can be used to obtain an indirect illumination effect.

The ceiling frame 1 of the ceiling structure of the present invention
In consideration of maintenance work of the HEPA filter 2, a known one-touch attachment / detachment locking mechanism is adopted as a bracket mechanism for supporting the frame of the filter unit 4 supported by the ceiling frame 11 It is also preferable to support it at the shoulder portion of the.

[0022]

As described above, in the clean room lighting device of the present invention, the height of the interior of the ceiling is reduced, and the effective height of the room is ensured, while the clean air flows down into the room. This has the effect of increasing the utilization as a clean room without disturbing.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment of a clean room lighting device of the present invention.

FIG. 2 is a partial perspective view showing an example of a ceiling filter material held by a part of a lighting fixture for a clean room.

FIG. 3 is a perspective view showing a part of a ceiling structure in which a clean room lighting device is incorporated.

FIG. 4 is a perspective view partially showing a reference example of the ceiling structure.

FIG. 5 is a cross-sectional view showing another configuration example (wide type) of the lighting fixture.

FIG. 6 is a cross-sectional view showing another configuration example (wide type) of the lighting fixture.

7 is a cross-sectional view showing a cross-sectional shape of a lighting fixture used in the ceiling structure of FIG.

FIG. 8 is a cross-sectional view showing a modified example of the lighting fixture.

9 is a schematic diagram showing a state of the lighting fixture shown in FIG. 8 when a fluorescent tube is replaced.

FIG. 10 is a cross-sectional view showing another modified example (movable exposure type) of the lighting fixture.

FIG. 11 is a cross-sectional view showing another modified example (fixed exposure type) of the lighting fixture.

FIG. 12 is a perspective view showing an example of a louver attached to the lower surface of the lighting fixture.

FIG. 13 is a partial cross-sectional view schematically showing an example of a clean room ceiling structure using a conventional lighting device directly attached to a ceiling surface and a flow of an air stream of clean air.

FIG. 14 is a partial cross-sectional view showing an example of a conventional clean room ceiling structure.

15 is a partial cross-sectional view schematically showing an example of a clean room ceiling structure using the lighting fixture shown in FIG. 14 and a flow of a clean air stream.

[Explanation of symbols]

1 ceiling structure 2 HEPA filter 3 hanging bolts 4 Filter unit 5 frame 6 bracket 7 Seal member 8 fan units Lighting equipment for 10 clean rooms 11 ceiling frame 15 Groove flange 20 Lighting fixture body 21 Box-shaped socket base 22 Mounting bracket 23 Fluorescent tube 24, 34, 44 sockets 25,45 reflector

Claims (2)

[Claims] 1. An inner surface of an upper flange of a ceiling frame member having a cross-sectional shape whose lower surface is open and which is vertically and horizontally arranged at predetermined positions at a ceiling surface position in a clean room, and is formed along a member longitudinal direction. The luminaire main body is screwed at an arbitrary position of the female screw formed along the groove side surface of the groove-shaped flange to fix the luminaire main body at an arbitrary position in the ceiling frame shape member. A lighting device for a clean room, characterized in that the lighting device is housed and held in. 2. An arbitrary position of an internal thread of the grooved flange so that a plurality of frames hold a socket base of the lighting fixture body and a reflector at a predetermined position and a ballast at another position. The lighting device for a clean room according to claim 1, wherein the lighting device is for a clean room.