JP2001307533A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make lighting covers easily openable when forming surface lightings with multiple light covers by covering a plurality of light sources such as fluorescent lamps provided on a ceiling, a wall or the like. SOLUTION: A lighting cover 4 is formed with a frame having a large opening for passing light and a light diffusing part which forms a flat lighting face by covering the opening. The lighting cover 4 is held turnably with one side of the cover as an axis with respect to an object such as the ceiling. The other side of the cover is mounted connected to the object by means of a removable opening stopper. By the constitution, the light cover turns around the one side of the cover as the axis when the stopper is unfastened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device provided on a ceiling, a wall, or the like, and more particularly, to a soft illuminating light from a wide flat surface by diffusing light from a light source such as a plurality of fluorescent tubes arranged in a plane. The present invention relates to a lighting device suitable for use for generating

[0002]

2. Description of the Related Art Conventionally, in galleries and the like, it has been desired that a large number of fluorescent tubes mounted on a ceiling surface have soft surface illumination in which the fluorescent tubes are not visible. There is a need for a lighting device that can function as integrated lighting. In response to this demand, as one of the conventional measures, as a lighting cover, a light-transmitting non-combustible sheet mainly made of a light-transmitting inorganic fiber cloth such as glass cloth is stretched over a rectangular metal frame. A lighting device used has been proposed.

[0003]

However, in order to arrange a large number of such lighting covers over a wide ceiling,
The structure is such that a grid-like frame is attached to the ceiling surface and the lighting cover is attached to the frame, so the interval between the lighting covers cannot be made too small, and there is a wide area between the lighting covers that does not emit light. As a result, even if an attempt is made to perform integrated lighting over a wide area of the ceiling, the area between the lighting covers appears as a thick black line in a lattice pattern on the ceiling, which has a problem of deteriorating the appearance. In addition, when the fluorescent lamp is cut off, it is necessary to remove the lighting cover, but there is a problem that the removal work is troublesome. In particular, in the case where the size of the lighting cover is increased to 2 m × 2 m, the handling becomes more difficult, and there is a problem that one lighting cover cannot be attached or detached by one person.

[0004] The present invention has been made in view of the above problems, and can easily open and close a lighting cover for covering a light source attached to an object such as a ceiling or a wall. It is an object of the present invention to provide a lighting device that can make a black line not irradiated with light as thin as possible and hardly be bothered.

[0005]

According to the present invention, a frame of an illumination cover for diffusing light from a light source is provided on a ceiling,
A structure in which an object such as a wall is pivotally held around one end of the frame frame as a fulcrum, and a position distant from the fulcrum in the other end direction of the frame frame is connected to a detachable opening / closing fastener. It is what it was. With this configuration, the lighting cover can be pivotally opened around a fulcrum near one end by removing the opening / closing locking fastener with the lighting cover attached to a predetermined position, and conversely, the lighting cover can be opened. The lighting cover can be attached to the predetermined position by pivoting back from the state to the predetermined position and locking the open / close locking fastener, so that the lighting cover can be easily opened and closed by one person. In addition, since the center of rotation of the lighting cover is located near the end, the lighting cover can be widely opened, and the amount of movement of one end where the fulcrum of the frame is disposed can be reduced. In doing so, the gap between adjacent lighting covers can be made extremely small, and the area (black line) between the lighting covers that does not emit light is made extremely small.
A good-looking, all-in-one type illumination can be formed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An illumination device according to one embodiment of the present invention is a lighting device, comprising: a light source; and a lighting cover arranged to cover the light source for diffusing light from the light source. Frame having a large opening through which the light passes, and a lighting cover provided with a light diffusing member that is attached to close the end of the opening opposite to the light source and forms a flat lighting surface, and the lighting cover A hinge that connects the frame frame to an object such as a ceiling or a wall so as to be pivotable around one end of the frame frame, and the frame frame at a position away from the fulcrum in the other end direction of the frame frame. It is a configuration having an opening / closing locking fastener detachably connected to the object, and by this configuration, the opening / closing locking fastener is removed or the lighting cover can be easily opened / closed by fastening.
Replacement work of a light source such as a fluorescent lamp can be easily performed.

In a lighting device according to another embodiment of the present invention, the hinge of the above-described lighting device is arranged inside the lighting cover, and a plurality of the lighting covers are close to each other and are on the same plane. It is configured to be arranged as follows. With this configuration, the gap between the adjacent lighting covers can be made extremely small, the area (black line) between the lighting covers that does not emit light can be made extremely small, and an all-in-one integrated lighting with good appearance can be formed.

In a lighting device according to still another embodiment of the present invention, a fixing frame is fixed to an object in order to attach the lighting cover to the object, and a hinge is connected to the fixing frame. Further, the hinge is provided with a light shielding structure that shields light between the frame frame and the fixed frame in the vicinity of a fulcrum including an area extending from a fulcrum of the hinge to a frame end closer to the fulcrum. A flexible structure for shielding the frame of the lighting cover from adjacent frame frames except at least a region extending from a fulcrum of the hinge to a frame end closer to the fulcrum. In this configuration, a plate-shaped light shielding member is attached. With this configuration, it is possible to prevent light from leaking into a gap formed between the frame frames of the adjacent lighting covers, and to improve the appearance.

A lighting device according to still another embodiment of the present invention has a structure in which a buffer device for reducing a turning speed of the lighting cover is provided between a frame of the lighting cover and the object. With this configuration, the turning speed of the lighting cover can be reduced, and the opening / closing operation can be performed safely.

A lighting device according to still another embodiment of the present invention has a structure in which the hinge has a stopper function for restricting an opening position of the lighting cover to a predetermined position. The lighting cover can be opened at a predetermined position, and it is possible to prevent the opening and closing cover from opening too much and causing trouble.

A lighting device according to still another embodiment of the present invention is arranged such that an inner surface of a frame of the lighting cover is formed at an end of an opening of the frame opposite to a light source. It is composed of a substantially perpendicular plane and an inclined surface having a shape that spreads out toward the lighting surface, whereby the entire surface of the lighting cover is irradiated with light through the light diffusion member (lighting surface). It is possible to secure a wide illumination surface and improve the appearance.

A lighting device according to still another embodiment of the present invention is arranged such that an inner surface of a frame of the lighting cover is formed at an end of an opening of the frame opposite to a light source. It is composed of a substantially perpendicular plane, an inclined surface having a shape extending toward the illumination surface, and a curved surface smoothly connecting the plane and the inclined surface, whereby most of the entire surface of the illumination cover is a light diffusing member. Can be used as a surface (illumination surface) for irradiating light through it, a wide illumination surface can be secured and the appearance can be improved, and since there are no corners on the inner surface of the frame, shadows on the illumination surface Is not reflected, and the appearance can be further improved.

[0013] In a lighting device according to still another embodiment of the present invention, the inner surface of the frame of the lighting cover may be moved from the light source side end of the opening of the frame cover to the end opposite to the light source. It is composed of a curved surface or a flat surface that smoothly spreads toward the lighting surface to be formed.
Most of the entire surface of the illumination cover can be made a surface (illumination surface) for irradiating light through the light diffusion member, and a wide illumination surface can be secured to improve the appearance. Since there is no shadow, corner shadows do not appear on the illumination surface, and the appearance can be further improved.

A lighting device according to still another embodiment of the present invention has a structure in which at least the inner surface of the frame of the lighting cover is painted white, and this structure allows the frame to shadow the light diffusing member. Without dropping or seeing the frame through the light diffusing member,
The external appearance can be improved by making the illumination surface of the illumination cover more uniform.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention shown in the drawings will be described below. FIGS. 1A and 1B are schematic perspective views showing a lighting device according to an embodiment in which the present invention is applied to ceiling surface lighting. FIG. 1A is a schematic perspective view of the lighting device, and FIG. FIG. 2 is a schematic perspective view showing the state, FIG. 2 is a schematic bottom view showing one illumination cover of the illumination device and the vicinity thereof, FIG.
FIG. 4 is a schematic cross-sectional view taken along the line AA of FIG. 2, FIG. 4 is a schematic cross-sectional view showing the same part as FIG. 3 with the illumination cover opened, FIG. 5 is a schematic cross-sectional view taken along the line BB of FIG. FIG. 6 is a schematic sectional view showing the same part as FIG. 5 with the illumination cover 4 opened, FIG. 7 is a schematic sectional view taken along the line CC of FIG. 5, and FIG. 8 is a line DD of FIG.
FIG. 9 is a schematic cross-sectional view taken along arrow EE in FIG. 8,
FIG. 10 is a schematic view taken along the line FF in FIG. A lighting device, which is generally designated by reference numeral 1, includes a light source 3 composed of a number of fluorescent tubes attached to a ceiling surface 2, a lighting cover 4 arranged to cover the light source 3, and a back side of the lighting cover 4. (Light source side), and is provided with a fixed frame 5 and the like for mounting the illumination cover 4. A large number of the illumination covers 4 are arranged close to each other so that the entire ceiling surface can perform surface illumination.

The illumination cover 4 has a frame 7 having a large opening 6 through which light passes, and an opening at an end (hereinafter referred to as a tip) of the opening of the frame 7 opposite to the light source 3. It has a light diffusion member 8 provided so as to close and form a flat illumination surface. In this embodiment, a light diffusion sheet (details will be described later) is used as the light diffusion member 8. The overall shape of the frame 7 is a square such as a square or a rectangle. The outer dimensions (length of each side) of the frame 7 are not particularly limited,
It is economically advantageous to be somewhat larger, for example, 1
The length of the side (the length of the long side in the case of a rectangle) is preferably about 1 to 3 m. Each side of the frame 7 is made to have the same cross-sectional shape, and as can be clearly seen from FIGS. 5 to 9, an illumination surface formed by a light diffusion sheet 8 extending on the inner end 7 a of the frame 7. A plane 7b that is almost perpendicular to
And an inclined surface 7c having a shape that spreads toward the tip of the opening. On the outer surface of the frame 7, a flat surface 7d substantially perpendicular to the illumination surface is formed on the front end side, and a clamp groove 7e for clamping the light diffusion sheet 8 is formed in the back. With this configuration, the light diffusion sheet 8
Is stretched so as to cover the opening surrounded by the front end 7a of the frame 7, the end is guided to the clamp groove 7 e, and the square pipe 11 for clamping is pressed from above, and is fixed to the frame 7 with the screw 12. The light diffusing sheet 8 can be attached. At this time, by applying an appropriate tension to the light diffusing sheet 8 in a portion that blocks the opening surrounded by the front end 7a of the frame 7, light diffusing in this portion can be performed. The sheet 8 maintains a flat surface, and can form a flat illumination surface with a very good appearance.

Further, an inclined surface 7 is provided at the front end region of the frame 7.
By forming c, the width of the tip 7a can be made extremely small, and the area of the light diffusion sheet 8 stretched at the tip of the frame 7 that does not contribute to illumination can be made extremely narrow. Moreover, since the light from the light source is also emitted in the direction along the inclined surface 7c as shown by the arrow G, when the lighting cover 4 is viewed from below, it appears that the entire surface of the lighting cover 4 is emitting light, Further, since the inclined surface 7c is formed, there is almost no shadow portion, and therefore, when looking up at the illumination surface, the shadow of the frame 7 at the rear is hardly seen. Thus, the frame 7 behind the frame 7 can be satisfactorily hidden to improve the appearance. The surface, particularly the inner surface, of the frame 7 is painted white. This allows
The frame frame 7 is no longer seen through the light diffusion sheet 8, and the illumination surface of the illumination cover 4 can be made more uniform to improve the appearance. The frame 7
The cross-sectional shape of the inner surface is not limited to the above-described embodiment, and can be variously changed. That is, in the embodiment described above, FIG.
As shown in (a), the inner surface of the frame 7 is constituted by a flat surface 7b substantially perpendicular to the illumination surface formed by the light diffusion sheet 8, and an inclined surface 7c having a shape expanding toward the front end of the opening. However, instead of this, as shown in FIG. 12B, a configuration may be adopted in which the flat surface 7b and the inclined surface 7c are connected by a smooth curved surface 7h such as an arc surface. With this configuration, there is no corner between the flat surface 7b and the inclined surface 7c, so that the corner does not cast a shadow on the light diffusing member 8. Further, as shown in FIGS.
May be configured as a curved surface (for example, an arc surface) 7i or a flat surface 7j having a shape that smoothly spreads from the light source side end toward the illumination surface formed at the end opposite to the light source. Also in this case, since there is no corner on the inner surface of the frame, the occurrence of shadow due to the corner can be prevented.

In FIG. 5, the outer corner of the front end 7a of the frame 7 has a small radius so as not to damage the light diffusion sheet 8. It is preferable that the roundness be as small as possible as long as the light diffusion sheet 8 is not damaged, because the width of the tip 7a, that is, the area that does not contribute to illumination can be reduced. As a specific numerical example, the radius of the roundness of the outer corner of the tip 7a is set to about 0.5 to 2 mm, more preferably 1 m.
m, and the width of the tip 7a (the width of the tip of the inclined surface 7b and the outer flat surface 7d) is selected to be about 1.5 to 3 mm, more preferably about 2 mm.
By employing these numerical values, the illumination cover 4 having an extremely good appearance can be configured.

The material of the frame 7 is arbitrary, such as metal or plastic, as long as it has the required strength. However, it is preferable to use a metal (for example, aluminum) punched die. For example, each side of the frame 7 is made of a stamping die,
The frame 7 can be formed by cutting the end faces at 45 degrees and abutting them together, connecting them using a metal L-shaped corner plate, and assembling them into a frame shape. With this configuration,
It is possible to manufacture and assemble the frame 7 with accurate dimensions without twisting and the like, and it is also possible to easily manufacture a large frame 7 having each side of 2 m. In addition, because of its high strength and rigidity, it can be used stably for a long period of time.

Light diffusion sheet 8 attached to frame 7
Is arbitrary as long as it is a light-diffusing material capable of exhibiting appropriate translucency and concealing property and has appropriate flexibility and bending resistance so that it can be used by being stretched over the frame 7. However, among these, a laminated sheet obtained by sticking a heat-resistant and light-transmitting resin sheet to a light-transmitting inorganic fiber cloth is preferable because it is excellent in heat resistance, non-combustibility, and stain resistance. In this type of laminated sheet, a glass fiber cloth is preferable as the inorganic fiber cloth, and a fluororesin, a Teflon (registered trademark) resin, a silicone resin or the like can be considered as the heat-resistant and translucent resin sheet, but a fluororesin is preferable. Among them, a soft fluororesin is most preferable. As the soft fluororesin, for example, produced by copolymerizing a monomer containing at least one fluorine-containing monomer and a monomer having both a double bond and a peroxy bond in the molecule, the peroxyl in the molecule A soft fluororesin obtained by graft-polymerizing vinylidene fluoride to a trunk polymer comprising a fluoropolymer containing a group and having a glass transition temperature of room temperature or lower can be mentioned. Such a soft fluororesin is commercially available from Central Glass Co., Ltd. as "Sefuralsoft" (trademark) (see "Plastics", March 1988).

Further, when the light diffusion sheet 8 is made of a glass fiber cloth laminated with a soft fluororesin,
It is preferable to include hollow glass beads in the soft fluororesin. In particular, resin 1
0.5 to 5 parts by weight of hollow glass beads per 100 parts by weight, preferably 1.5 to 2.1, particularly 1.52 to 2.5.
When 1.53 hollow glass beads having an average particle size of about 8 to 12 μm are contained, a laminated sheet having a good balance between shielding properties and translucency can be obtained. That is, when the ratio of the hollow glass beads is less than 0.5 parts by weight, the light diffusing property is reduced, and the shielding property is reduced. On the other hand, when the proportion of the hollow glass beads is more than 5 parts by weight, the light transmittance is deteriorated and the film is difficult to form. As described above, the laminated sheet in which the soft fluororesin containing the hollow glass beads is laminated on the glass fiber base cloth is excellent in flexibility, bending resistance, antifouling property, heat resistance, light diffusion property, nonflammability, and light transmission. Rate 40% or more, turbidity 9
0% or more is obtained, and when this is used as the light diffusion sheet 8, the light source can be concealed well to form an illumination surface that shines uniformly and softly, and is excellent in heat resistance and nonflammability, and can be used stably for a long period of time. Benefits are obtained.

In FIG. 1 to FIG. 4, a fixed frame 5 for mounting the lighting cover 4 is formed in a frame shape having substantially the same size as the frame frame 7.
5 is fixed to the ceiling 2. The members constituting the fixed frame 5 are not particularly limited, but in the present embodiment, similarly to the frame 7, an aluminum punched die is used.

2 to 4, in order to hold the illumination cover 4 on the fixed frame 5, a point O is set as a fulcrum on two sides of the illumination cover 4 facing the frame 7 and near one end of the frame 7. The hinge 20 is attached, and an openable / closable locking fastener 30 that can be locked and released is arranged on the side of the frame 7 opposite to the side where the hinge 20 is mounted. Hereinafter, the hinge 20 and the opening / closing stopper 30
Will be described in detail. In the following description, the end of the frame 7 on the side where the hinge fulcrum O is arranged is referred to as a rear end, and the opposite side is referred to as a front end.

In FIGS. 5 to 7, the hinge 20 includes a first hinge plate 21 fixed to the fixed frame 5, a second hinge plate 22 fixed to the frame 7 and a first hinge plate 21.
And a pin 23 for connecting the second hinge plate 22 to pivot about the fulcrum O. As can be clearly understood from FIG. 7, the first hinge plate 21 has its upper end bent, and is fixed to the fixed frame 5 by screws 24. on the other hand,
An L-shaped member 25 is welded to the second hinge plate 22, and the L-shaped member 25 is screwed to the frame 7.
It is fixed to. The first hinge plate 21 and the second hinge plate 22 are arranged inside the frame 7 so that the first hinge plate 21 and the second hinge plate 22 do not protrude outward from the frame 7, so that the frame 7 can be arranged side by side. The width d of the gap 27 between the frame frames 7 can be reduced. Also,
The first hinge plate 21 and the second hinge plate 22 are
Are arranged parallel to and near the inner plane 7b, so that light from the light source 3 (see FIG. 2) to the light diffusion sheet 8 is prevented as much as possible.

As can be clearly understood from FIGS. 5 and 6, the fulcrum O
Is arranged appropriately (about 30 to 50 mm) away from the light diffusion sheet 8 so as not to cast a shadow on the light diffusion sheet 8 stretched on the front end 7a of the frame 7. Further, it is preferable that the fulcrum O be as close as possible to the rear end of the frame 7 in order to open the frame 7 greatly. When the tip 7a of the wheel 6 turns as shown by the arrow H, the amount of movement in the horizontal direction becomes large, and the tip 7a hits the adjacent frame 7. Therefore, the fulcrum O is appropriately separated from the rear end of the frame 7 so as to appropriately reduce the amount of movement of the tip 7a in the lateral direction. Note that the narrower the width d of the gap 28 formed between the front and rear adjacent frame frames 7 is, the better the appearance of the entire illumination surface is, but if it is too small, the position of the fulcrum O cannot be selected. Therefore, usually, the width d of the gap 28 is set to 5 to 15
It is preferable to select about mm.

First hinge plate 21 and second hinge plate 22
Supports not only the pin 23 disposed at the fulcrum O,
A light shielding structure that shields light between the frame frame 7 and the fixed frame 5 near the fulcrum including an area extending from the fulcrum O to the rear end of the frame 7 is formed. That is, the first pin plate 21 has a wide width W from a position substantially before the fulcrum O to a position beyond the rear end of the frame 7, and
An arc edge 21a, a vertical edge 21b, and an inclined edge 21c so as to allow the frame frame 7 to pass when the frame frame 7 is turned by 90 ° from the position shown in FIG. 5 to the open position shown in FIG.
A notch surrounded by is formed. Further, as shown in FIG. 5, the second hinge plate 22 has a shape capable of blocking the cutout of the first hinge plate 21 and shielding light when the frame 7 is set at a predetermined mounting position. Accordingly, it is possible to prevent light from the light source 3 from leaking from the vicinity of the fulcrum O to the gap 27 near the fulcrum O. As described below,
Since the gap 27 is shielded by the light shielding member 41 except for the vicinity of the fulcrum O, the light shielding structure provided on the hinge 20 is provided to shield the region where the light shielding member 41 is not provided. In addition, in order to further ensure the light shielding, the first hinge plate 2 is provided near the end of the first hinge plate 22.
It is preferable to provide an auxiliary light shielding plate (indicated by a broken line 42 in FIG. 2) so as to be positioned at right angles to the frame 2 and between the frame 7 and the fixed frame 5. The vertical edge 21c formed on the first hinge plate 21 is formed such that when the frame 7 is turned to the open position shown in FIG. 6, the vertical edge 21c is prevented from turning further. Thus, the first hinge plate 21
A stopper function for restricting the opening position of the lighting cover 4 to a predetermined position can be achieved, thereby preventing the lighting cover 4 from opening too much and causing trouble.

The opening / closing stopper 30 is for fixing the lighting cover 4 to a predetermined position (the position shown in FIG. 2) close to the fixing frame 5 and for releasing the fixing. As shown in FIGS. 8 to 10, the opening / closing locking fastener 30 is held by the locking rod 32 attached to the frame 7 via the support member 31 and the fixed frame 5. Latch member 33 that can be locked and released
have. This latch member 33 is fixed to the fixed frame 5.
A hook 35a, which is rotatably held by a shaft 35 held via a support member 34, and which is locked to the locking rod 32, and a guide portion 33b which is provided to be inclined on the opposite side. And a lever portion 33c for opening and closing operation. Further, the latch member 33 is normally held at a locking position indicated by a solid line in FIG. 8 by a coil spring 36, and the lever portion 33c of the latch member 33 is pulled down as indicated by an arrow to thereby release the latch member 33 from the locking rod 32. Can be removed. As can be clearly understood from FIGS. 9 and 10, the lever portion 33c of the latch member 33 extends outside the frame 7, and the gap 28 between the adjacent frames 7 is disposed.
It is located above. Thus, a suitable hook is inserted through the gap 28, and the lever 33c is hooked and pulled down by the hook, whereby the latch member 3
3 can be removed. In order to lock the latch rod 32 from the state in which the latch member 33 is removed, the frame 7 in the open state may be simply pushed up. As a result of this operation, the locking rod 32 held by the frame 7 rises, comes into contact with the guide portion 33b of the latch member 33, and pivots the latch member 33, so that the locking rod 32 moves the tip of the guide portion 33b. When passing, the latch member 33 returns to the original position by the coil spring 36, and thereby automatically enters the locked state. Note that the opening / closing locking fastener 30 is not limited to this configuration, and may be configured to release the locking by pushing up the lever portion 33, or may be changed to one using a commercially available latch lock.

As described above, a large number of lighting covers 4 are arranged in front and rear, right and left, and the width of the gaps 27 and 28 between the lighting covers 4 at this time is determined by the hook for pulling down the latch member 33. The lighting cover 4 is set as small as possible within a range in which a tool can be inserted and the lighting cover 4 can be opened without any trouble. Specifically, it is preferably about 5 to 15 mm.
The widths of the vertical and horizontal gaps 27 and 28 may or may not be the same, but it is preferable that the widths be the same since the overall appearance is good.

A gap 27 formed between each lighting cover 4,
Numeral 28 does not emit light unlike the illumination surface formed by the light diffusion sheet 8, and therefore appears as a black line on the ceiling surface. However,
If the light from the light source 3 leaks into the gaps 27 and 28 irregularly, the brightness of the gaps 27 and 28 differs depending on the location, and the appearance of the ceiling surface is deteriorated. Therefore, in order to prevent light from leaking into the gaps 27 and 28, a plate-shaped light shielding member 41 such as a plate material or a sheet is attached to the upper surface of the frame 7 of each lighting cover 4 so as to protrude outward. ing. The protruding length of the light-shielding member 41 is determined by the length of the light-shielding member 41 attached to the adjacent frame 7, FIG.
As shown in the figures, the length is set so as to overlap and exhibit a good light-shielding effect, and is made of a flexible material so as to be easily deformed so as not to cause any trouble when opening and closing the frame 7. . As the light shielding member 41, for example, a garbage plate, a plastic sheet, or the like is used.

The light-shielding member 41 is arranged in the entire periphery of the frame 7 except at least a region extending from the fulcrum O, which is the center of rotation of the frame 7, to the rear end. In FIG.
Hatched areas of the gaps 27 and 28 are areas where the light shielding member 41 is arranged. Here, the frame 7
The reason why the light blocking member 41 was not arranged in the region from the fulcrum O, which is the center of rotation, to the rear end is as follows. That is,
When the light-shielding member is attached over the entire length of the side of the frame frame 7 to which the hinge 20 is attached, when the frame 7 is turned around the fulcrum O, the movement direction is opposite between the front and the back of the fulcrum O. Naru (when you turn down in front of the fulcrum O,
(It turns upward after the fulcrum O), so that the light shielding member 41 attached to the frame 7 is near the fulcrum O,
The light may interfere with the light shielding member 41 attached to the adjacent frame 7 and be twisted. To prevent this twist,
No light-blocking member is provided in a region extending from the fulcrum O to the rear end. In order to prevent light leakage at this portion, the hinge 20 has a light blocking function as described above.

In the illumination device 1 having the above-described structure, as shown in FIG. 1 (a), a large number of illumination covers 4 are arranged close to each other, and the light from the light source is diffused by the light diffusion sheet 8 of the illumination cover 4. By doing so, the entire surface of the illumination cover 4 emits soft light, and a wide surface illumination is formed. Here, gaps 27 and 28 are present between the lighting covers 4, but since these gaps are extremely small, only a grid-like thin line can be seen on the lighting surface and is not very noticeable. In addition, since the light shielding structure is provided in these gaps 27 and 28, there is no light and dark in the thin lines formed by the gaps 27 and 28. Thus, a very attractive surface illumination can be provided.

Next, in order to open the illumination cover 4 for exchanging the fluorescent lamp or the like constituting the light source 3, a hook is inserted through the gap 28 between the illumination covers 4 and the lever portion 33c of the latch member 33 ( Pull down the latch member 3 (see FIG. 8).
3 is removed from the locking rod 32. Accordingly, the lighting cover 4 can be turned around the fulcrum O, and as shown in FIG. 3, the lighting cover 4 is turned downward. Thereby, the lower part of the light source 3 can be widely opened, and operations such as replacement of the fluorescent tube can be performed. In order to close the opened lighting cover 4, it is sufficient to simply turn the lighting cover 4 upward and return to the original position. Thus, the lighting cover 4 can be opened and closed with a simple operation. Further, when performing the opening / closing operation, the worker only needs to support the lighting cover 4 at the portion where the opening / closing locking fastener 30 of the lighting cover 4 is attached, so that the worker can work alone.

In the above-described embodiment, the illumination cover 4 is held simply rotatably with respect to the fixed frame 5, but if necessary, the frame 7 of the illumination cover 4 may be held.
It is also possible to provide a buffer device between the and the fixed frame 5 for reducing the turning speed when the lighting cover 4 is turned downward and opened. By providing such a shock absorber, when the light cover 4 is inadvertently released when the light cover 4 is opened, the light cover 4 suddenly turns downward by its own weight and collides with the stop position. Opening and closing operation can be performed safely. A dashpot, a spring, or the like can be used as appropriate as the shock absorber.

Further, in the above embodiment, the illumination cover 4 is simply held rotatably by the hinge 20 on the fixed frame 5 and is not easily removable.
The connection between the first hinge plate 21 and the second hinge plate 22 constituting the hinge 20 may be easily detached, and the illumination cover 4 may be easily detachable. FIGS. 13 and 14 show the hinge portion of the embodiment configured as described above. The hinge 20A used in this embodiment includes a first hinge plate 21A connected to a fixed frame (not shown) and a second hinge plate 22 fixed to the frame 7 of the lighting cover 4.
A is pivotally connected by pin 23A,
The pin 23A used here is fixed to the first hinge plate 21A and has flat surfaces 23Aa on both side surfaces. On the other hand, the second hinge plate 22A is located at a position facing the first hinge plate 21A.
A groove 22Ab that allows the narrow portion of Aa and the pin 23A to pass is provided. As shown in FIG. 13A, the direction in which the groove 22Ab is formed is horizontal in a normal mounting state in which the frame 7 is in a horizontal state. However, FIGS. 13B and 14A ), The groove 22Ab is set to face downward when the frame 7 is opened vertically. Thus, the pin hole 22Aa
In the state where the pin 23A is inserted into the connector, the lighting cover 4 can be turned around the pin 23A to be opened and closed,
In a state where the lighting cover 4 is opened in a vertical state, FIG.
As shown in FIG. 4 (d), by lifting up the lighting cover 4, the pin 23A can be pulled out through the groove 22Ab, and the lighting cover 4 can be removed. With this configuration, not only the opening and closing of the illumination cover but also the removal thereof can be easily performed, and the maintenance work of the light source and the like can be more easily performed.

Further, in the above embodiment, the light diffusing sheet 8 is used as a light diffusing member for forming the illumination surface of the illumination cover 4, but instead of the light diffusing sheet 8, light such as a glass plate or a plastic plate is used. A diffusion plate may be used. Further, the light diffusion sheet 8 and the light diffusion plate are not limited to those simply for diffusing the light from the light source 3, but may be those for drawing a picture or a pattern and exerting a design effect.

Further, in the above embodiment, the case where the illumination surface formed at the lower end of the illumination cover 4 is a flat surface and a large number of illumination covers 4 are arranged vertically and horizontally to configure a wide area illumination has been described. The lighting device of the present invention is not limited to this case, and can be applied to a case where a plurality of lighting covers 4 are simply arranged in one row, or in some cases, a case where only one lighting cover is used. Even when one row or one lighting cover is used, the lighting cover can be arranged very close to the surrounding wall surface or the like, and a lighting surface with a good appearance can be formed. Furthermore, the illumination surface formed at the lower end of the illumination cover 4 is not limited to a flat surface, but may be an inclined surface, a curved surface, a curved surface, or the like. For example, as shown in FIG. 11, a large number of lighting covers 4 are arranged on the ceiling 2 to form surface lighting, and the end of the surface lighting and the wall 50 are formed.
When the light source 3 is also arranged at the corner between
The illumination cover 4A according to the embodiment of the present invention can be attached to the corner at a position where the light source 3 is covered. The lighting cover 4A has a bent shape when viewed from the side, and the hinge 20 is pivotable about a fulcrum O near one end thereof.
To the fixed frame 5 and the other end is opened and closed
0 detachably connected to the wall 50. The illumination cover 4A having this configuration can also be widely opened around the fulcrum O, and the opening and closing operation can be easily performed. In addition, in this illumination cover 4A, the illumination surface has a shape obtained by bending a straight line, but may have an arc shape instead.

[0037]

As described above, in the lighting device of the present invention, the lighting cover is held rotatably with the vicinity of one end as a fulcrum with respect to the fixed frame provided on the ceiling surface or the like.
In addition, since a position separated from the fulcrum is connected with a detachable opening / closing locking fastener, the lighting cover is detached with the lighting cover attached to a predetermined position, thereby removing the lighting cover near one end. The lighting cover can be opened by pivoting around the fulcrum of the fulcrum. On the contrary, the lighting cover is pivoted back from the opened state to the predetermined position, and the opening / closing locking fastener is locked to attach the lighting cover to the predetermined position. This has the effect that the lighting cover can be easily opened and closed by one person. In addition, since the center of rotation of the lighting cover is located near the end, the lighting cover can be widely opened, and the amount of movement of one end where the fulcrum of the frame is disposed can be reduced. In this case, the gap between the adjacent lighting covers can be made extremely small, and the area (black line) between the lighting covers that does not emit light is made extremely small, so that an all-integrated illumination with good appearance can be formed. .

[Brief description of the drawings]

FIGS. 1A and 1B are schematic perspective views showing a lighting device according to an embodiment in which the present invention is applied to ceiling surface lighting, wherein FIG. 1A is a schematic perspective view of the lighting device, and FIG. Schematic perspective view showing the state of

FIG. 2 is a schematic bottom view showing one lighting cover of the lighting device shown in FIG. 1 and the vicinity thereof;

FIG. 3 is a schematic sectional view taken along the line AA of FIG. 2;

FIG. 4 is a schematic cross-sectional view showing the same portion as FIG. 3 with an illumination cover opened.

FIG. 5 is a schematic sectional view taken along the line BB of FIG. 2;

FIG. 6 is a schematic sectional view showing the same part as in FIG. 5 with the lighting cover 4 opened;

FIG. 7 is a schematic sectional view taken along the line CC of FIG. 5;

8 is a schematic sectional view taken along the line DD of FIG. 2;

9 is a schematic sectional view taken along the line EE in FIG. 8;

FIG. 10 is a schematic view taken along the line FF in FIG. 8;

FIG. 11 is a schematic sectional view showing another embodiment of the present invention.

FIGS. 12A, 12B, 12C, and 12D are schematic cross-sectional views each showing an example of a cross section of a frame.

13A is a schematic front view showing a modification of a hinge for attaching a lighting cover in a horizontal state, and FIG. 13B is a schematic view showing the same part as in FIG. Front view

14A is a schematic front view of a main part of the hinge in the state shown in FIG. 13B, FIG. 14B is a cross-sectional view taken along line GG of FIG. 13A, and FIG. Pin 23A with arrow H-
(D) is a schematic front view showing the same part as (a) with the second hinge plate 22A removed from the first hinge plate 21A.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Illumination device 2 Ceiling 3 Light source 4 Illumination cover 5 Fixed frame 6 Opening 7 Frame frame 7a Tip 7b Flat surface 7c Inclined surface 7d Flat surface 7e Clamp groove 8 Light diffusion sheet 11 Clamp square pipe 12 Screw 20 Hinge 21 First hinge plate 22 First Double hinge plate 23 Pin 27, 28 Gap 30 Opening / closing locking fastener 32 Locking rod 33 Latch member 35 Shaft 36 Coil spring 41 Light shielding member

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme court II (reference) // F21Y 103: 00 F21Y 103: 00

Claims (10)

[Claims] 1. A light source, a lighting cover arranged to cover the light source for diffusing light from the light source, a frame having a large opening for transmitting light, and a light source having the opening. A lighting cover provided with a light diffusing member attached so as to cover the end opposite to the other end, and a frame frame of the lighting cover, which is pivotable around one end of the frame frame as a fulcrum, such as a ceiling or a wall. A lighting device comprising: a hinge connected to an object; and an opening / closing fastener that detachably connects the frame to the object at a position away from the fulcrum in the other end direction of the frame. 2. A light source, a lighting cover arranged to cover the light source for diffusing light from the light source, a frame having a large opening for transmitting light, and a light source having the opening. A lighting cover provided with a light diffusing member that is attached to close the end on the opposite side to form a flat lighting surface, and the frame frame of the lighting cover can be turned around one end of the frame frame as a fulcrum. A hinge for connecting to an object such as a ceiling or a wall, and an open / close locking fastener for detachably connecting the frame to the object at a position away from the fulcrum in the other end direction of the frame. Lighting equipment. 3. The lighting device according to claim 2, wherein the hinge is disposed inside the lighting cover, and the plurality of lighting covers are disposed so as to be close to each other and on the same plane. The lighting device according to the above. 4. A hinge for holding the lighting cover to the object is connected to a fixed frame fixed to the object, and the hinge is a frame end closer to the fulcrum than the fulcrum of the hinge. A light shielding structure for shielding light between the frame frame and the fixed frame in the vicinity of a fulcrum including a region reaching the portion, wherein the lighting cover is provided on the frame frame at least on a side closer to the fulcrum from the fulcrum of the hinge. The lighting device according to any one of claims 1 to 3, wherein a flexible plate-shaped light shielding member that shields light between adjacent frame frames is attached except for a region reaching an end portion. apparatus. 5. The buffer according to claim 1, further comprising a buffer between the frame of the lighting cover and the object to reduce a turning speed of the lighting cover. Lighting equipment. 6. The lighting device according to claim 1, wherein the hinge has a stopper function for restricting an opening position of the lighting cover to a predetermined position. 7. An inner surface of a frame of the lighting cover,
A frame formed at an end of the opening of the frame opposite to the light source, the plane being substantially perpendicular to the illumination surface, and an inclined surface extending toward the illumination surface. Item 7. The lighting device according to any one of Items 1 to 6. 8. An inner surface of a frame of the lighting cover,
A plane substantially perpendicular to the illumination surface formed at the end of the opening of the frame opposite to the light source, an inclined surface extending toward the illumination surface, and smoothly connecting the plane and the inclined surface. The lighting device according to claim 1, wherein the lighting device includes a curved surface. 9. An inner surface of a frame of the lighting cover,
7. A frame or a flat surface having a shape that smoothly spreads from an end on the light source side of an opening of the frame to an illumination surface formed on an end opposite to the light source. The lighting device according to claim 1. 10. The lighting device according to claim 1, wherein at least an inner surface of a frame of the lighting cover is painted white.