JP4450184B2 - Chassis and lighting fixture - Google Patents

Description

  The present invention relates to a chassis having a chassis main body including a frame portion bent in a direction opposite to a bending direction of a side plate portion, and a lighting fixture including the chassis.

  2. Description of the Related Art Conventionally, a built-in lighting fixture that is embedded in an installation surface such as a ceiling surface and uses, for example, a straight tube fluorescent lamp, a chassis is formed in a longitudinal shape corresponding to the length of the fluorescent lamp. For this reason, in this type of chassis, the center region in the longitudinal direction is recessed in the width direction as compared with both ends at the stage of being molded. Also, when this chassis is attached to the installation surface, it is further tightened in the width direction by tightening with a bolt or the like.

Therefore, as this kind of lighting fixture, a support tool is inserted from the irradiation opening at the lower part of the chassis, and the chassis and the support tool are supported by the support tool that supports the outer flange formed at the edge of the irradiation opening. Is known to be fixed to the installation surface with bolts (see, for example, Patent Document 1).
Japanese Unexamined Patent Publication No. 2000-133303 (page 2-4, FIG. 1 and FIG. 3)

  However, the above-described lighting fixture has a problem that since the support is inserted into the chassis, the thickness of the chassis must be increased by the amount of the support, and it is difficult to reduce the thickness.

  This invention is made | formed in view of such a point, and it aims at providing the chassis which can prevent the dent to the width direction, and a lighting fixture provided with the same while reducing in thickness.

The chassis according to claim 1 is a longitudinal top plate portion, a side plate portion that is bent from both sides in the width direction of the top plate portion, and a side plate portion at a distal end portion in a direction opposite to the bending direction of the side plate portion. A chassis body with a frame portion bent toward the end; end plates attached to both ends in the longitudinal direction of the top plate portion; and attached to the chassis body on the side opposite to the bending direction of the side plate portion, And a reinforcing bracket for energizing and holding the frame portion so as to be deformed in the expanding direction at a substantially central portion in the longitudinal direction.

End plates are attached to both ends in the longitudinal direction of the top plate portion of the chassis main body, and reinforcing metal fittings for energizing the frame portion at the substantially central portion in the longitudinal direction of the chassis main body so as to deform in the expanding direction. By attaching to the chassis body on the side opposite to the side plate bending direction, there is no space for mounting the reinforcing bracket in the chassis body, making it possible to reduce the thickness of the chassis body, and using the end plates and the reinforcing bracket to extend the length of the chassis body. It is possible to reinforce the chassis body so as to be deformed in the expanding direction at both ends and substantially the center of the direction, and reliably prevent the depression in the width direction.

The chassis according to claim 2 is the chassis according to claim 1, wherein the reinforcing bracket is bent along the side plate portion of the chassis main body from the main body plate portion facing the top plate portion of the chassis main body, and both sides of the main body plate portion. The metal plate side plate portion , the urging portion that abuts and holds the frame portion of the chassis main body so as to deform the frame portion in the expanding direction, and the main body along the urging direction of the urging portion. And a reinforcing groove formed over the plate portion and the metal side plate portion.

  The biasing direction of the biasing portion extends from the main body plate portion facing the top plate portion of the chassis main body, and the metal side plate portions bent along the side plate portions of the chassis main body from both side portions of the main body plate portion. By forming the reinforcing groove along the, the reinforcing metal fitting is reinforced by the reinforcing groove in the urging direction of the urging portion, and the strength of reinforcement of the reinforcing metal fitting is ensured.

  According to a third aspect of the present invention, in the chassis according to the first or second aspect, the frame portion has a curved portion that is bent from the front end portion toward the center in the width direction of the chassis main body, and the reinforcing bracket is attached to the chassis. The biasing portion is in contact with the curved portion.

  Then, the urging portion of the reinforcing bracket can be easily attached to the chassis main body by causing the urging portion of the reinforcing bracket to fold back from the front end of the frame portion to the center side in the width direction of the chassis main body and to come into contact with the curved curved portion. The urging force of the urging portion is reliably transmitted to the frame portion via the curved portion, and the reinforcing effect is improved.

  A lighting fixture according to a fourth aspect includes the chassis according to any one of the first to third aspects; and a lamp attached to the chassis.

  By providing the chassis according to any one of claims 1 to 3, it is possible to reduce the thickness and to prevent the depression in the width direction and to easily attach a lamp or the like to the chassis body. Become.

According to the chassis of claim 1, end plates are respectively attached to both ends in the longitudinal direction of the top plate portion of the chassis main body, and the frame portion is deformed in the expanding direction at a substantially central portion in the longitudinal direction of the chassis main body. By attaching the reinforcing brackets that energize each to the chassis main body on the side opposite to the side plate bending direction, there is no space for mounting the reinforcing brackets in the chassis main body, and the thickness can be reduced, and the end plates and the reinforcing brackets Thus, the chassis main body is reinforced so as to be deformed in the expanding direction at both ends and substantially the center in the longitudinal direction of the chassis main body, and the depression in the width direction can be reliably prevented.

  According to the chassis of the second aspect, in addition to the effect of the chassis of the first aspect, the main body plate portion facing the top plate portion of the chassis main body, and the side plate portions of the chassis main body from both side portions of the main body plate portion. The reinforcing metal fitting is reinforced in the urging direction of the urging portion with the reinforcing groove by forming a reinforcing groove along the urging direction of the urging portion over the metal side plate portion bent along. The strength of reinforcement can be secured.

  According to the chassis of claim 3, in addition to the effect of the chassis of claim 1 or 2, the urging portion of the reinforcing bracket is folded back from the front end portion of the frame portion to the center side in the width direction of the chassis body. By abutting against the curved portion, the reinforcing bracket can be easily attached to the chassis body, and the urging force of the urging portion is reliably transmitted to the frame portion via the curved portion, so that the reinforcing effect can be improved.

  According to the lighting apparatus of the fourth aspect, by providing the chassis according to any one of the first to third aspects, it is possible to reduce the thickness and to prevent the depression in the width direction with certainty, and to easily provide a lamp or the like on the chassis main body. Can be attached to.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 is a cross-sectional view showing a mounting state of a lighting fixture, FIG. 2 is a bottom view showing a chassis, FIG. 3 is a cross-sectional view taken along line AA of FIG. 2, and FIG. 5 is an enlarged perspective view showing a part of the chassis main body, FIG. 6 is a perspective view showing attachment of the chassis main body and the end plate, FIG. 7 is a plan view of the lighting fixture, and FIG. 8 is a perspective view of the lighting fixture. is there.

  As shown in FIGS. 1 to 8, the luminaire is an embedded luminaire that is embedded in an installation surface such as a ceiling surface, and uses a pair of straight fluorescent lamps L as a lamp. The tube-shaped fluorescent lamp L is formed in a longitudinal shape corresponding to the longitudinal direction.

  Reference numeral 11 denotes a chassis that is also used as a main reflector. The chassis 11 is made of a metal and has a longitudinal chassis body 12 and end plates attached to both ends of the chassis body 12 in the longitudinal direction. An irradiation opening 15 is formed on the lower surface of the box having an end plate 13 and a reinforcing metal fitting 14 attached to the chassis body 12.

  The chassis body 12 is formed by pressing a relatively thin metal plate, for example, by press molding, etc., and is formed to be bent so as to expand from the longitudinal top plate portion 21 and both sides of the top plate portion 21. The side plate portions 22 on both sides are formed, and the frame portions 23 are formed by bending the lower end portion, which is the tip portion of the side plate portion 22, into a substantially L-shaped cross section. The chassis body 12 is formed such that the width dimension at both ends in the longitudinal direction is slightly larger than the width dimension of the end plate 13, and the end plate 13 is attached to both ends as shown in FIG. The dimension increases from both ends in the longitudinal direction toward the center.

  As shown in FIGS. 1 and 2, the top plate portion 21 is formed with an electric wire insertion hole 25 into which a power supply line is drawn in a central portion in the longitudinal direction, and a longitudinal portion of the fluorescent lamp L is formed on a side portion of the electric wire insertion hole 25. A lamp holder 26 that holds one end in the direction is provided, and a mounting portion 27 for suspending and installing the chassis 11 is formed in the central area between the longitudinal center and the longitudinal ends, A ballast for turning on the fluorescent lamp L, that is, an inverter 28 is attached between the electric wire insertion hole 25 and the attachment portion 27.

  The attachment portion 27 is partitioned in a longitudinal shape by a pair of slits 31 formed on both sides along the longitudinal direction, and is integrally connected to the top plate portion 21 at both ends in the longitudinal direction. Furthermore, a plurality of attachment holes 32 are formed in these attachment portions 27, respectively, to which bolts B installed on the ceiling or the like are inserted and attached. A pair of bag dowels 33 are formed on the sides of the slits 31 of the mounting portions 27, respectively.

  The inverter 28 is covered with a reflecting plate 34. The reflector 34 is made of metal, is formed in a longitudinal shape along the longitudinal direction of the chassis main body 12, and is formed in a substantially V shape that is pointed downward in a cross-sectional view. It is arranged in between. Further, the reflecting plates 34 are fixedly attached to the chassis 11 by projecting a plurality of projections (not shown) on both sides and fitting these projections into the bag 33.

  The side plate portion 22 is provided over the entire longitudinal direction of the top plate portion 21, and the inner side surface is a reflector of the fluorescent lamp L.

  As shown in FIGS. 3 and 4, the frame portion 23 includes a flange portion 35 protruding in a flange shape from both side edge portions of the irradiation opening 15, and a bent portion 36 formed by bending from the tip portion of the flange portion 35. And a curved portion 37 that is bent from the upper end that is the tip of the bent portion 36, and is formed continuously in the entire longitudinal direction of the side plate portion 22.

  The flange portion 35 protrudes outward from the irradiation opening 15 from the lower end portion of the side plate portion 22, and is inclined to the side plate portion 22 side.

  The bent portion 36 is bent and protrudes from the front end portion of the entire flange portion 35 in an upward direction that is opposite to the bending direction of the side plate portion 22.

  The bending portion 37 is bent so as to be folded back from the distal end portion of the bending portion 36 to the center side in the width direction of the chassis main body 12. Further, as shown in FIG. 5, a notch 38 into which a part of the end plate 13 is fitted is formed in the vicinity of both end portions in the longitudinal direction of the curved portion 37. For this reason, claw portions 39 for preventing the end plate 13 from coming off are formed between both end portions in the longitudinal direction of the curved portion 37 and the cutout portions 38.

  The frame portion 23 is configured such that the upper end side of the bent portion 36 is inclined toward the center side in the width direction of the chassis 11 in a state where the lighting fixture is not attached to the installation surface such as the ceiling, and the bolt B is tightened to install the lighting fixture. The flange portion 35 is deformed so as to be substantially horizontal in a state where it is attached to the.

  On the other hand, as shown in FIGS. 1 and 6, the end plate 13 includes an end plate main body 41 having a substantially trapezoidal shape in plan view, an end plate projecting portion 42 formed by bending from an upper end portion of the end plate main body 41, and an end plate main body. An end plate side portion 43 that is bent from both side portions of 41 and an end plate frame portion 44 that is bent from the lower end portion of the end plate main body 41 are provided.

  Each end plate main body 41 is formed in an isosceles trapezoidal shape in which the upper side is narrow and the lower side is wide along the cross-sectional shape of the top plate portion 21 and the side plate portion 22 of the chassis main body 12. Each end plate main body 41 is provided with two pairs of lamp sockets 45 which form a pair for connecting each fluorescent lamp L. Each fluorescent lamp L connected between the lamp socket 45 and the lamp holder 26 at each end is disposed between the both side plate portions 22 of the chassis 11 and the central reflecting plate 34.

  The end plate protrusions 42 are formed to be bent substantially vertically to the end plate main bodies 41 along the horizontal direction on the chassis main body 12 side, and with the end plates 13 attached to the chassis main body 12, It is in contact with the upper part of the top plate part 21, that is, the outer part.

  The end plate side portions 43 are formed to be bent perpendicularly to the end plate main bodies 41 and contact the outer side portions of the side plate portions 22 of the chassis main body 12 with the end plates 13 attached to the chassis main body 12. is there.

  The end plate frame portion 44 forms a frame portion at both ends of the chassis 11 continuously to the frame portion 23 in a state where the end plate 13 is attached to the chassis main body 12, and ends from the opposite side of the chassis main body 12. The end plate body includes an insertion piece portion 46 that is continuous in a substantially U shape in plan view to both side portions of the plate body 41 and is inserted between the bending portion 36 and the bending portion 37 of the frame portion 23 of the chassis body 12. 41 is formed by bending from both sides.

  The insertion piece portions 46 are respectively provided with dowel-shaped fitting protrusions 47. These fitting protrusions 47 are formed to bend so as to bend in a direction intersecting, for example, orthogonal to the longitudinal direction of the chassis main body 12, which is the mounting direction of the end plate 13, and on the center side in the width direction of the chassis main body 12. It protrudes and fits into the notch 38 with the end plate 13 attached to the chassis body 12.

  As shown in FIGS. 1 and 7, the reinforcing metal fitting 14 is connected to the main body plate portion 51 facing the top plate portion 21 of the chassis main body 12, and from the both side portions of the main body plate portion 51 to the side plate portion 22 of the chassis main body 12. A metal plate side plate 52 bent along the metal plate 52 and a metal frame portion 53 that contacts the frame portion 23 of the chassis main body 12 are provided, and a bead 54 serving as a reinforcing groove extends over the main plate 51 and the metal plate side plate 52. Is formed. Further, the reinforcing metal fitting 14 is formed with a width dimension substantially equal to the width dimension between the two frame portions 23 of the chassis main body 12.

  The main body plate portion 51 is in contact with the upper portion of the top plate portion 21 of the chassis main body 12, that is, the outside, with the reinforcing bracket 14 attached to the chassis main body 12, and has a width dimension substantially equal to the top plate portion 21. It is formed in a slightly long shape along the longitudinal direction of the main body 12. Further, a rectangular opening 55 through which the electric wire insertion hole 25 is exposed is formed at the center of the main body plate portion 51. The opening 55 is formed in a longitudinal shape along the longitudinal direction of the main body plate portion 51.

  The metal side plate portion 52 is formed by being bent along the side plate portion 22 from both side portions of the main body plate portion 51, and is positioned above the side plate portion 22 in a state where the reinforcing metal fitting 14 is attached to the chassis main body 12.

  The metal frame 53 includes a metal flange portion 56 that is bent substantially horizontally in a flange shape outward from the lower end portion of the metal side plate portion 52, and an urging portion that is formed by bending from the front end portion of the metal flange portion 56. And 57.

  The metal flange portion 56 faces the flange portion 35 in a state where the reinforcing metal fitting 14 is attached to the chassis main body 12.

  The urging portion 57 abuts the inside of the curved portion 37 of the frame portion 23 and urges the frame portion 23 in the expanding direction, that is, the width direction outside of the chassis main body 12. It is bent substantially vertically upward.

  The bead 54 is continuous in a straight line along the width direction of the reinforcing bracket 14 at a position between both longitudinal ends of the main body plate portion 51 and the metal plate side plate portion 52 and both longitudinal ends of the opening 55. And is formed in a convex shape in the upward direction opposite to the chassis main body 12.

  Next, the assembly procedure of the one embodiment will be described.

  First, end plates 13 are attached to both ends of the chassis main body 12 in the longitudinal direction.

  At this time, the chassis main body 12 is slightly sunk in the width direction, the end plate protrusions 42 and the end plate side portions 43 of the end plates 13 are directed to the chassis main body 12 side, and the insertion piece portion 46 is the bending portion 36 and the bending portion. It is fitted between 37, inserted into the longitudinal center of the chassis body 12, and the fitting protrusion 47 is fitted into the notch 38.

  Then, each end plate 13 is caulked with the claw portion 39 while closely contacting the chassis main body 12, and a blind rivet or the like (not shown) is driven from below to penetrate the top plate portion 21 and the end plate protruding portion 42, Each end plate 13 is retained from the chassis main body 12.

  Thereafter, the reinforcing metal fitting 14 is attached to the central region in the longitudinal direction of the chassis body 12 from the upper side of the chassis body 12.

  At this time, as shown in FIG. 3, the metal fitting frame portion 53 of the reinforcing metal fitting 14 is pushed into the frame portion 23 of the chassis main body 12, and the urging portion 57 is brought into contact with the inside of the curved portion 37 of the frame portion 23. The frame portion 23 is urged and held in the expanding direction.

  In this state, the reinforcing metal fitting 14 is screwed to the chassis main body 12 with a screw (not shown) while holding the reinforcing metal fitting 14.

  Further, lamp sockets 45 are respectively attached to the inner side of the end plate body 41 of the end plate 13, and are fixed to the chassis main body 12 with a blind rivet (not shown) while holding the lamp holder 26 from below, and the inverter 28 is fixed to the ceiling. After mounting and fixing at a predetermined position of the plate portion 21, when the bolt B is inserted into the mounting hole 32 from below and tightened, the frame portion 23 is deformed from the state shown in FIGS. 2 and 3 to the state shown in FIG. To do.

  Then, after pulling the electric wire downward from the electric wire insertion hole 25 and connecting it to the inverter 28, the protruding portion of the reflecting plate 34 is fitted to the bag dowel 33 while covering the inverter 28 and the like, and the reflecting plate 34 is attached to the chassis 11. Attach and attach both ends of the fluorescent lamp L to the lamp socket 45 and the lamp holder 26, respectively.

  As described above, the end plates 13 are respectively attached to both ends in the longitudinal direction of the top plate portion 21 of the chassis main body 12, and the frame portions 23 are urged in the expanding direction at substantially the center in the longitudinal direction of the chassis main body 12, respectively. By attaching the reinforcing metal fitting 14 to the chassis main body 12 on the side opposite to the bending direction of the side plate portion 22, the chassis 11 can be thinned without taking up a space for attaching the reinforcing metal fitting 14 in the chassis main body 12.

  In particular, the chassis main body 12 is formed by bending a relatively thin longitudinal metal plate or the like by press molding or the like, so that it can easily be squeezed in the width direction in the center region in the longitudinal direction, and the bolt B is mounted on the top plate. Since it is easy to sag in the width direction due to the weight of both side plate portions 22 by inserting it into the mounting hole 32 of the portion 21 and tightening it firmly and attaching it to the installation surface, the chassis is formed by the end plate 13 and the reinforcing bracket 14 Reinforcing the chassis body 12 in the width direction can be reliably prevented by reinforcing the chassis body 12 in the expanding direction at both ends and substantially the center of the body 12 in the longitudinal direction.

  In addition, by providing slits 31 on both sides of the mounting portion 27, when the bolt B is inserted into the mounting hole 32 and tightened, the mounting portion 27 is deformed so that deformation of the entire top plate portion 21 can be suppressed. The depression in the width direction of the side plate portion 22 due to the deformation of the top plate portion 21 can be prevented more reliably.

  Furthermore, by forming the width dimension of both ends in the longitudinal direction of the chassis main body 12 to be larger than the width dimension of the end plate 13, both ends of the chassis main body 12 in the longitudinal direction when the end plate 13 is attached to the chassis main body 12. Since the portion is slightly sunk in the width direction, the elasticity of the metal plate forming the chassis body 12 urges the side plate portion 22 to expand in the width direction at both ends in the longitudinal direction. The depression in the width direction can be further suppressed.

  Then, the main body plate portion 51 that faces the top plate portion 21 of the chassis main body 12 and the bracket side plate portion 52 that is bent along the side plate portion 22 of the chassis main body 12 from both side portions of the main body plate portion 51. By forming the bead 54 along the urging direction of the urging portion 57, the reinforcing metal fitting 14 is reinforced with the bead 54 in the urging direction of the urging portion 57, and the reinforcing strength of the reinforcing metal fitting 14 can be secured.

  Further, the urging portion 57 of the reinforcing metal fitting 14 is brought into contact with the curved portion 37 of the frame portion 23, whereby the reinforcing metal fitting 14 can be easily attached to the chassis main body 12, and the urging portion 57 via the curved portion 37. The urging force is reliably transmitted to the frame portion 23, and the reinforcing effect can be improved.

  Further, a fitting projection 47 is provided on the insertion piece portion 46 of the end plate 13 in a direction intersecting the insertion direction, and the fitting projection 47 is formed when the end plate 13 is attached to the chassis main body 12. By forming the notch portion 38 to be fitted in the curved portion 37 of the frame portion 23, the end plate 13 can be easily positioned with respect to the chassis main body 12 when the end plate 13 is attached to the chassis main body 12. The attachment strength to 13 chassis main bodies 12 can be improved.

  In addition, the fitting protrusions 47 are more securely removed from the notches 38 by caulking and deforming the claw portions 39 respectively formed at both ends in the longitudinal direction of the curved portion 37 adjacent to the notches 38. I can stop it.

  Note that the luminaire can also be applied to a one-lamp luminaire or three or more luminaires.

It is sectional drawing which shows the attachment state of the lighting fixture which shows one embodiment of this invention. It is a bottom view which shows a chassis same as the above. It is AA sectional drawing of FIG. It is sectional drawing which shows attachment of a chassis main body and a reinforcement metal fitting same as the above. It is a perspective view which expands and shows a part of chassis main body same as the above. It is a perspective view which shows attachment of a chassis main body and an end plate same as the above. It is a top view of a lighting fixture same as the above. It is a perspective view of a lighting fixture same as the above.

Explanation of symbols

11 Chassis
12 Chassis body
13 End plate
14 Reinforcing bracket
21 Top plate
22 Side plate
23 Frame
37 Curved part
51 Main plate
52 Bracket side plate
54 Beads as reinforcement grooves
57 Energizing section L Fluorescent lamp as lamp

Claims (4)

A longitudinal top plate portion, a side plate portion that is bent from both sides in the width direction of the top plate portion, and a frame portion that is bent toward the direction opposite to the bending direction of the side plate portion at the front end portion of the side plate portion. A chassis body with;
End plates attached to both ends of the top plate in the longitudinal direction;
A reinforcing bracket attached to the chassis main body on the opposite side of the side plate bending direction and energizing and holding the frame portion so as to be deformed in the expanding direction at a substantially central portion in the longitudinal direction of the chassis main body;
A chassis characterized by comprising: Reinforcing metal fittings
A body plate facing the top plate of the chassis body;
A metal side plate bent from both sides of the main body plate along the side plate of the chassis main body,
An urging portion that urges and holds the frame portion so that the frame portion deforms in the expanding direction by contacting the frame portion of the chassis body
The chassis according to claim 1, further comprising a reinforcing groove formed across the main body plate portion and the metal plate side plate portion along the urging direction of the urging portion. The frame portion has a curved portion that is bent from the tip portion toward the center side in the width direction of the chassis main body,
The chassis according to claim 1, wherein the reinforcing metal member has an urging portion in contact with the curved portion. A chassis according to any one of claims 1 to 3;
A lamp attached to the chassis;
The lighting fixture characterized by comprising.

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