JPS6224882Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a lighting fixture applied to a system ceiling.

[Background technology]

Conventional lighting equipment that functions as an inspection port on the back side of the ceiling is constructed as shown in FIGS. 1 to 5. That is, between a pair of main body channels 1 and 1', a ballast box 2, a socket base 3,
3', etc., and the main body channels 1, 1' are mounted on the heads 5, 5' of a pair of T-bars 4, 4' on the ceiling via mounting brackets 6, 6'. The mounting brackets 6, 6' have push screws 7 on their side pieces, and are fixed by pressing the tips of the push screws 7 against the vertical pieces of the T-bars 4, 4'. The reflector 8 is inserted between the T-bars 4 and 4' in a curved manner,
Place it on the collars 9 and 9'. 10 is a lamp socket, and 11 is an equipment plate. Now, when opening the inspection port, the lamp (not shown) is removed from the lamp socket 10, and the reflector plate 8 is bent and removed from the T-bars 4, 4'. As a result, the socket base 3,
An inspection port M is opened between the main body channels 1 and 1' between the main body channels 1 and 3'.

However, this lighting fixture has T-bar 4,
Even if the distance L ₁ between the main body channels 1 and 1' is 305 mm, for example, the distance L ₂ between the main body channels 1 and 1' is as narrow as 240 mm, which has the disadvantage that it cannot accommodate the human chest thickness. In addition, when fixing the main body channels 1, 1' to the T-bars 4, 4', the adhesion between the mounting brackets 6, 6' and the T-bars 4, 4' is weak with the push screw 7, and the heads 5, 5' Although this prevents floating, there is a problem in that the T-bars 4, 4' are easily moved in the longitudinal direction due to vibration or the like. Furthermore, as shown in FIG. 5, if the push screws 7 are tightened too much, the T-bars 4, 4' will tilt as shown in the imaginary line, making the ceiling surface unsightly.

On the other hand, in contrast to the above-mentioned sliding type, there was also a rotary type, as shown in FIG. 6, in which a rotating shaft 13 was provided on the T-bar 12 and the instrument body 14 was rotated to a vertical position to form an inspection port. This one has an opening width of the inspection port of T
Since the bar spacing can be set to L ₁ , there will be no problem for people to enter the inspection opening, but when the bar is in a vertical position, the height H from the T-bar 12 to the back of the ceiling is the maximum.
The position was 300 to 500 mm, and the drawback was that it could not be applied to objects with ceiling pockets of 300 mm or less.

[Purpose of invention]

The purpose of this invention is to provide a sliding type lighting fixture that can provide a sufficient opening width for the inspection port.

[Disclosure of invention]

This invention includes a first socket base installed on a pair of T-bars on the system ceiling, and a first socket base that is slidably installed on the T-bars and slides toward the first socket base. a second socket base which opens an inspection port on the side opposite to the socket base; a lead wire cover for positioning the lamp socket spacing between the first socket holder and the second socket holder to the interval at which the lamp is installed; It is provided with a reflective plate that is detachably mounted and closes the inspection port. When the lamp is removed, the reflector is removed, and the socket base is moved a certain amount closer to the other socket base as in the conventional method, the inspection port opens, but the width of the opening is the same as in the conventional case since there is no main body channel. This will ensure that there is no problem for people to enter.

An embodiment of this invention is shown in FIGS. 7 to 10. That is, in this lighting fixture, a pair of socket stands 15, 15' are installed on T-bars 16, 16' at a predetermined distance. Mounting pieces 18, 18' to be placed on the heads 17, 17' of the T-bars 16, 16' are bent on both side plates of each socket base 15, 15', and clamping pieces 19, 19' and mounting screw 2
0 and 20', the heads 17 and 17' are held in a fixed state, but since they are only held in place, they are slidable in the longitudinal direction of the T-bars 16 and 16'. At the lower end of these clamping pieces 19, 19', there is a lifting prevention claw 2 that engages with the lower edge of the heads 17, 17'.
1 is provided. The socket pedestals 15, 15' are provided with an end plate 22 on the back, a lamp socket (not shown) is attached, a ballast box 23 is installed on the top surface of one of the socket pedestals 15, and The cylindrical lead wire covers 24 and 25 are extended in the direction, and the lead wire covers 24 and 25 are slidably fitted to each other, and the fitting portion at the tip is attached to one cover 25 with a socket base spacing claw. 26, an engagement hole 27 is formed in the other cover 24, and a fixing thumb screw 28 is threaded into the engagement portion. A crossover wiring is passed through these covers 24 and 25.
The reflector 29 has the same flexibility as the conventional one, and is inserted between the T-bars 16 and 16' between the socket bases 15 and 15', and is mounted between the ribs 30 and 30' of the T-bars 16 and 16'. be done. Further, a straight tube lamp (not shown) is installed between the lamp sockets.

With this configuration, when opening the inspection port, the lamp is removed from the lamp socket, the reflector is removed, and the thumb screw 28 is removed. Therefore, the socket base 15' where the ballast box 23 is not installed is slid in the direction approaching the socket base 15 (the first
Figure 0). Normally, the total length _L3 of the instrument is 1300mm, and the inspection port
The appropriate length of M′ L ₄ is about 470 mm. As a result,
The opening width of inspection port M' is the distance between T bars 16 and 16' L ₁
The width of the opening corresponds to the width of the opening, and the length of the opening can be set to a sufficient length. Also T bar 1
Since the attachment portions to 6 and 16' are closely held by the mounting piece and the holding piece, sufficient adhesion force is obtained and the parts do not easily move due to vibrations. Furthermore, since the packaging can be carried out by contracting the socket bases 15, 15' into the state shown in FIG. 10 to form an inspection hole, the packaging can be made smaller, the packaging material is less, the cost is reduced, and transportation is also facilitated. Also, the height of the equipment (ballast box) is sufficient for the ceiling pocket.

In addition, in the lighting fixture of this invention, the means for positioning the socket base in the normal use state is not limited to the above-mentioned spacing claws or thumbscrews. Further, it is sufficient that at least one of the socket bases is slidable.

[Effect of idea]

As described above, in the lighting equipment of this invention, a pair of socket stands are installed between the installation bars at a predetermined interval, and at least one of them is made slidable.
It is possible to obtain the inspection port width for the bar spacing, and there is an effect that packaging and transportation are facilitated.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional example, FIG. 2 is a schematic sectional view thereof, and FIG. 3 is a perspective view showing how it is attached to a bar.
Fig. 4 is a side view of the device, Fig. 5 is a side view with the push screw over-tightened, Fig. 6 is a front view of the rotary lighting fixture with its inspection port open, and Fig. 7 is an example of this invention. FIG. 8 is a schematic sectional view thereof, FIG. 9 is a partially enlarged view thereof, and FIG. 10 is a perspective view with an inspection port formed. 15, 15'...Socket stand, 16, 16'...T bar, 17, 17'...Head, 18, 18'... Crown piece,
19, 19'... clamping piece, 20, 20'... mounting screw,
24, 25... Lead wire cover, 26... Spacing claw, 28... Fixing thumb screw, 29... Reflector, 3
0,30'...Brim, M'...Inspection port.

Claims (1)

[Scope of utility model registration request] The first one is installed on a pair of T-bars on the system ceiling.
a second socket base that is slidably installed on the T-bar and that opens an inspection port on the side opposite to the first socket base by sliding toward the first socket base; , is extendable and retractable, and both ends thereof are connected to the first socket base and the second socket base, and in an extended state, the first socket base is connected to the first socket base and the second socket base.
a lead wire cover for positioning the lamp socket spacing between the first socket pedestal and the second socket pedestal to the interval at which the lamp is mounted;
and a reflector plate that is detachably mounted between the socket bases of the T-bar and between the brim of the T-bar and closes the inspection opening.