JPH07230713A - Flange case mounting structure of lighting fixture - Google Patents

Abstract

PURPOSE:To provide a flange case mounting structure which is not likely to impair the appearances of mounting and also flange case itself and which permits the flange case to be mounted on and removed from a ceiling easily. CONSTITUTION:An inward protruding flange 4 is provided ring-shapedly along the upper edge of a flange case 1 of sheet metal in a cup form having a small wall thickness in which a cord 3 is inserted in such a way as incapable of slipping off in the condition that the body of lighting fixture is hung down, and a plurality of outward protruding flanges 5 are fixed to a ceiling A at a certain spacing circumferentially. The undersurface of the inward flange 4 is engaged by the oversurfaces of the outward flanges 5 by rotating the flange case 1 in the condition that the outward flanges 5 are intruded downward from notches 6 provided in the inward flange 4, and the flange case 1 is mounted to the ceiling A removably in such a condition as restricting the motion in the radial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bowl-shaped flange case in which a cord for suspending an instrument body is inserted in a state in which the instrument body is suspended so that the cord cannot be pulled out. The present invention relates to a flange case mounting structure for a lighting fixture that is detachably mounted from its lower surface side.

[0002]

2. Description of the Related Art A flange case mounting structure for a lighting fixture has a structure in which an excess cord is stored in a bowl-shaped flange case when adjusting the hanging height of the fixture body. It will be supported with a flange case,
Conventionally, as described in JP-A-60-63806,
Attach the engaging claws on the ceiling side, position the upper and lower positions of the flange case by the contact between the flange case and the ceiling surface, and insert the engaging claws into the groove formed on the inner peripheral surface side of the flange case. Then, the flange case is attached to the ceiling side.

[0003]

When a thin metal plate is processed into a bowl to form a bowl-shaped flange case, the cord accommodation space inside the flange case is enlarged so that the adjustable range of the cord length is widened. The larger the diameter of the flange case, the easier the flange case is to deform in the radial direction.
There is a drawback that the mounting appearance of the flange case is likely to be damaged, and if the position of the concave groove formed in the flange case and the position of the engaging claw fixed to the ceiling do not match due to the deformation of the flange case, the flange There is also a drawback that it becomes difficult to attach the case to the ceiling side.

Further, when a recessed groove into which the engaging claw is inserted is formed on the inner side of the flange case by sheet metal, the outer surface of the flange case at the portion where the recessed groove is formed bulges in a streak shape, which impairs the appearance of the flange case itself. There is a drawback that it is easily damaged.

Further, when the flange case is abutted against the ceiling surface, the mounting vertical position of the flange case is positioned, and the engaging claw fixed to the ceiling side is inserted into the groove formed in the flange case. There is a drawback that the ceiling surface is easily damaged.

Further, when the flange case is mounted on the ceiling side in a state where it is easily displaced in the circumferential direction, the gap between the flange case and the engaging claws is widened due to the deformation of the flange case, resulting in a concave groove. The engagement margin with the engagement claw may be insufficient, and in this case, there is a drawback that the flange case easily falls off together with the instrument body.

The present invention has been made in view of the above circumstances, and when the flange case made of sheet metal is detachably attached to the ceiling side, the attachment structure of the flange case is devised to attach the flange case. It is an object of the present invention to provide a flange case mounting structure for a lighting fixture, which is less likely to impair the appearance and the appearance of the flange case itself, and which allows the flange case to be easily attached to and removed from the ceiling side.

It is another object of the present invention to provide a flange case mounting structure for a lighting fixture in which the flange case is less likely to fall off from the ceiling side.

Another object of the present invention is to provide a flange case mounting structure for a lighting fixture which is less likely to damage the ceiling surface when the flange case is attached to or detached from the ceiling side.

[0010]

To achieve the above object, the present invention is characterized in that a cord for suspending an instrument body is pulled out from a thin bowl-shaped flange case made of sheet metal while the instrument body is suspended. Is a flange case mounting structure of a lighting fixture, which is inserted through the flange case in a detachable manner, and the flange case is detachably attached to the ceiling side from the lower surface side thereof. The annular flange is provided with a cutout portion on the inner peripheral edge of the inward flange, and the outward flange is fixed to the ceiling side, and the outward flange is downwardly moved from the cutout portion of the inward flange. By rotating the flange case in a state of being inserted, the lower surface side of the inward flange and the upper surface side of the outward flange are locked so that the flange case has a diameter larger than that of the ceiling side. Moving in the direction There lies in mounted detachably in a state of being restricted.

A detent for elastically engaging and disengaging the flange case from above and below by the rotation operation of the flange case across the inward flange and the ceiling side to prevent the flange case from rotating with respect to the ceiling side. When the section is provided, the flange case is hard to fall off from the ceiling side.

A contact member which contacts the upper surface side of the inward flange in a state where the outward flange is inserted downward from the cutout portion of the inward flange is fixed to the ceiling side, and the contact member. In the case where the lower surface side of the inward flange and the upper surface side of the outward flange are disengaged by the rotation operation of the flange case with the upper surface side of the inward flange remaining in contact with , It is hard to damage the ceiling surface when attaching or detaching the flange case to the ceiling side.

When the inward flange is elastically sandwiched between the contact member and the outward flange in the vertical direction, and the flange case is detachably attached to the ceiling side, It is difficult to damage the ceiling surface when attaching or detaching the flange case to the ceiling side, and the flange case does not easily fall off from the ceiling side.

[0014]

[Operation] Since the inward flange is annularly provided along the upper edge side of the flange case, the flange case can be reinforced without impairing the external appearance, and the radial deformation of the thin bowl-shaped sheet metal flange case can be prevented. At the same time, by making good use of this inward flange, the inward flange and the outward flange fixed to the ceiling side are locked by rotating the flange case, and the flange case is detachably attached to the ceiling side. Therefore, the attachment / detachment operation of the flange case is simple, the mounting portion of the flange case to the ceiling side is difficult to see from the outside of the flange case, and the outer surface of the flange case is not deformed.

A detent portion is provided over the inward flange and the ceiling side so as to elastically engage and disengage from each other in the vertical direction by the rotation operation of the flange case and prevent the flange case from rotating with respect to the ceiling side. In this case, the movement of the flange case in the circumferential direction can be restricted.

A contact member that contacts the upper surface of the inward flange with the outward flange inserted downward from the notch of the inward flange is fixed to the ceiling side, and the inward flange of the inward member is fixed to the contact member. If the lower surface of the inward flange and the upper surface of the outward flange are engaged and disengaged when the flange case is rotated while the upper surface is still in contact with the flange case, the upper and lower positions of the flange case must be in contact with each other. Since the positioning is performed by the contact between the member and the outward flange, the flange case can be attached and detached without contacting the flange case with the ceiling surface.

When the flange case is elastically sandwiched between the contact member and the outward flange in the vertical direction and the flange case is detachably attached to the ceiling side, the flange case is attached vertically. The position of the flange case can be determined by the contact between the contact member and the outward flange, and the flange case can be attached and detached without contacting the flange case with the ceiling surface, and the flange case can be displaced in the circumferential direction. Can be regulated.

[0018]

According to the flange case mounting structure of the lighting apparatus according to the first aspect, it is difficult to damage the mounting appearance of the flange case and the appearance of the flange case itself, and the flange case can be easily attached to and detached from the ceiling side.

In the structure for mounting the flange case of the luminaire according to the second aspect, the flange case is hard to fall off from the ceiling side.

In the flange case mounting structure for a lighting device according to the third aspect, the ceiling surface is less likely to be damaged when the flange case is attached to and detached from the ceiling side.

In the structure for mounting the flange case of the luminaire according to the fourth aspect, the ceiling surface is not easily damaged when the flange case is attached to or detached from the ceiling side, and the flange case is unlikely to drop off from the ceiling side.

[0022]

【Example】

[First Embodiment] FIG. 1 shows a thin bowl-shaped flange case 1 made of sheet metal, and a cord 3 for suspending an instrument body (not shown) is inserted into the flange case 1 in a state in which the instrument body is suspended so that the instrument body cannot be pulled out. 1 shows a flange case mounting structure of a lighting fixture in which a flange case 1 is detachably attached to the ceiling A side from its lower surface side via a sheet metal mounting substrate 2 that is screwed to the ceiling A side. The inward flange 4 is provided in an annular shape along the upper edge side of the flange case 1, and the inward flange 4 is provided.
Notch portions 6 are formed at two locations (plural locations) on the inner peripheral edge of the mounting board 2 fixed to the ceiling A side, and two (plural) outward flanges are provided at intervals in the circumferential direction of the flange case. When the flange case 1 is rotated with the outward flange 5 inserted downward from the notch 6 formed in the inward flange 4, the lower surface side of the inward flange 4 and the outward flange 5 are rotated.
The flange case 1 is detachably attached to the ceiling A side in a state in which the radial movement thereof is restricted by engaging with the upper surface side.

The flange case 1 is formed by processing a thin plate material into a bowl shape to form a circular horizontal section, and a resin cord stopper 8 having an annular base is formed in a through hole 7 formed at the lower end of the flange case. The power supply cord 3 which is attached in a retaining state and suspends the instrument body is inserted through the cord stopper 8, and a hooking ceiling 9 for electrically connecting the power supply cord 3 is provided on the ceiling A side with screws. It is inserted into the hooked sealing body 10 that has been stopped.

In the cord stopper 8, a large number of claws 8a for sandwiching the power feeding cord 3 are integrally formed so as to be elastically displaceable in the radial direction, and the power feeding cord 3 is inserted with the claws 8a inserted inside the flange case 1. While being inserted, the cord stopper 8 is pulled down to the outside of the flange case 1 and the pawl 8a is elastically displaced inward in the radial direction at the inner peripheral edge of the through hole 7, so that the feeding cord 3 is pinched by the pawl 8a. Then, the power supply cord 3 is fixed so that the power supply cord 3 cannot be pulled out while the instrument body is suspended, and from this state, the cord stopper 8 is pushed into the inside of the flange case 1 together with the power supply cord 3 to obtain the claw 8a.
By allowing elastic displacement in the radial direction, the feeding length of the power supply cord 3 from the flange case 1 can be adjusted.

As shown in FIG. 2, the inward flange 4 provided on the flange case 1 is a ring member 12 made of a metal plate and having an L-shaped cross section formed by bending a cylindrical peripheral wall 11.
Is provided by spot welding on the inner peripheral surface of the flange case 1, and notches 6 are formed at two locations facing each other in the radial direction of the inward flange 4, and the notch 6 extends in the circumferential direction toward each of the notches 6. The inward flange 4 of the portion facing from one side is stamped upward by the thickness of the plate to form an engaging flange 13 that engages with the upper surface of the outward flange 5, and engages with the lower surface of the engaging flange 13. Tsuba 1
The upper surface of the inward facing collar 4 that does not form 3 is aligned with the same height level.

The mounting substrate 2 is, as shown in FIG.
The thin plate material is processed into sheet metal by metal working to form a dish having a cylindrical peripheral wall 14, and a fixing plate 15 for fixing bolts, which will be described later, is punched out from the central portion of the thin plate material formed in the dish shape to face inward. It is formed in a ring shape having a screw-fastening collar 16 and surrounds the outer periphery of the hooking sealing body 19 and is fixed to the ceiling surface B by screw-fastening the screw-fastening collar 16 applied to the ceiling A side.

Two outwardly facing flanges 5 are formed by bending at the lower end of the peripheral wall 14 of the mounting board 2 in the radial direction, which are spaced from each other in the circumferential direction of the flange case, and these outwardly facing flanges 5 are formed. The two tongue pieces 17 have a phase difference of 90 ° with respect to 5, and the lower surface of the tongue piece 17 and the outward facing collar 5
The outer surface is bent and formed so as to be at the same height level as the upper surface.

Then, as shown in FIGS. 4 and 5, when the flange case 1 is held by hand and the outward flange 5 is inserted downward from the notch 6 formed in the inward flange 4, the inward flange 4 is inserted. With the lower surface of the tongue piece 17 serving as a contact member abutting on the upper surface of the flange case 1 to form a slight gap between the upper end of the flange case 1 and the ceiling surface B, the mounting vertical position of the flange case 1 is Positioned and in this state, flange case 1
When the rotating operation is performed while pressing the tongue piece 17 side, the engaging flange 1 formed on the inward flange 4 does not damage the ceiling surface B.
The upper surface of the outward facing collar 5 is disengaged from the lower surface of 3, and the flange case 1 is detachably attached to the ceiling A side.
The movement of the flange case 1 in the radial direction is caused by the inward flange 4
It is regulated by the contact between the inner peripheral edge of and the outer surface of the peripheral wall 14 of the mounting substrate 2.

The flange case 1 is elastically engaged with and disengaged from the vertical direction by the rotation operation of the flange case 1 across the engaging flange 13 and the outward flange 5 on the ceiling A side, and the flange case 1 is moved to the ceiling A side. A detent portion 18 for deterring rotation is provided.

The anti-rotation portion 18 has a protrusion 19 downwardly formed on the engaging collar 13 and also has an outward facing collar 5.
A small hole 20 is formed so as to penetrate therethrough, and the outward flange 5 is inserted downward from the notch 6 of the inward flange 4 to form the protrusion 19.
Flange case 1 in the state where it is in contact with the end face of the collar 5 facing outward.
When is rotated, each of the inward flange 4, the outward flange 5, and the tongue piece 17 including the engaging flange 13 elastically deforms in the thickness direction,
When the projection 19 is inserted into the upper surface side of the outward flange 5 and the flange case 1 is further rotated, the projection 19 elastically engages and disengages in the small hole 20 of the outward flange 5, and the flange case 1 is locked against the ceiling A side.

[Second Embodiment] FIGS. 6 and 7 show a fixing structure of the mounting board 2 when the ceiling surface B is made of concrete or the like and the mounting board 2 cannot be screwed. The mounting substrate 2 is integrally assembled in advance, the bolts 24 on the ceiling A side are inserted into the fixing plate 15, and the nuts 25 are tightened and fixed. The fixing plate 15
The mounting board 2 is a state in which the two engaging tongue pieces 21 formed on the peripheral edge of the fixing plate 15 are inserted into the upper surface side of the screw fixing flange 16 from the notch 22 formed in the screw fixing flange 16. Then, the fixing plate 15 and the mounting substrate 2 are rotated relative to each other so as to engage and disengage freely, and the two flanges 23 and the two engaging members 23 formed on the fixing plate 15 which is the punching remaining portion of the notch 22. The flange 16 for screwing is sandwiched between the joint tongue piece 21 and assembled together. The power supply cord 3 is connected to the wiring 26 on the ceiling A side via a free terminal 27. Other configurations are similar to those of the first embodiment.

[Third Embodiment] In the mounting substrate 2 shown in the first embodiment, the two outward facing flanges 5 and the two tongue pieces 17 are arranged such that the lower surface of the tongue pieces 17 is higher than the upper surface of the outward facing flange 5. The flange is formed by bending it in a state in which it is positioned slightly below and elastically sandwiching the inward flange 4 from the vertical direction by elastically deforming the tongue piece 17 as a contact member and the outward flange 5 in the thickness direction. The case 1 may be detachably attached to the ceiling A side. In this case, since the inward flange 4 is elastically sandwiched between the tongue piece 17 and the outward flange 5 to restrict the circumferential displacement of the flange case 1, the engagement of the inward flange 4 is restricted. Joint 1
It is also possible to omit the anti-rotation portion 18 including the protrusion 19 formed on the outer peripheral surface 3 and the small hole 20 penetratingly formed on the outward flange 5. Other configurations are similar to those of the first embodiment.

[Other Embodiments] 1. The sectional shape of the flange case in the horizontal direction is not limited to a circular shape, and may be a rectangular shape or a polygonal shape. 2. The inward flange may be integrally formed with the flange case. 3. The inward flange may be provided along the upper edge of the flange case or may be provided so as to enter the inside of the upper edge of the flange case. 4. The contact member that contacts the upper surface side of the inward flange is not limited to a flange-shaped member, and for example, a wiring member such as a hooking sealing body or a hooking sealing member or the mounting substrate shown in the first embodiment. The screw-stopping brim itself may also be used as the contact member. 5. The outward flange may be formed integrally with, for example, the hooking sealing body or the outer peripheral surface of the hooking ceiling.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 Sectional view

FIG. 2 is a top view of the flange case.

FIG. 3 is a top view of a mounting board.

FIG. 4 is a top view of the mounting board with the flange case attached.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a sectional view showing a second embodiment.

FIG. 7 is a top view of essential parts.

[Explanation of symbols]

 1 Flange case 3 Cord 4 Inward flange 5 Outward flange 6 Notch section 17 Contact member 18 Rotation stop section A Ceiling

Claims (4)

[Claims] 1. A thin bowl-shaped sheet metal flange case (1)
A cord (3) for suspending the instrument body is inserted into the instrument body in a suspended state, and the flange case (1) is detachably attached to the ceiling (A) side from its lower surface side. A flange case mounting structure for an installed lighting fixture, wherein an inward flange (4) is provided in an annular shape along an upper edge side of the flange case (1), and an inward flange of the inward flange (4) is provided. A cutout (6) is formed, and an outward flange (5) is fixed to the ceiling (A) side, and the outward flange (5) is extended from the cutout (6) of the inward flange (4). By rotating the flange case (1) with 5) inserted downward, the lower surface side of the inward flange (4) and the upper surface side of the outward flange (5) are locked. ,
A flange case attachment structure for a lighting fixture, wherein the flange case (1) is detachably attached to the ceiling (A) side in a state where its radial movement is restricted. 2. The flange case (1) is elastically engaged with and disengaged from the up and down direction by the turning operation of the flange case (1) across the inward flange (4) and the ceiling (A) side. The flange case mounting structure for a lighting fixture according to claim 1, further comprising a rotation stopping portion (18) for stopping the rotation of (1) with respect to the ceiling (A) side. 3. The notch (6) of the inward facing collar (4).
From the contact member (1) which contacts the upper surface side of the inward flange (4) in a state where the outward flange (5) is inserted downward.
7) is fixed to the ceiling (A) side, and the contact member (1)
When the flange case (1) is rotated while the upper surface side of the inward flange (4) is kept in contact with (7), the lower surface side of the inward flange (4) and the outward flange. The flange case mounting structure for a lighting fixture according to claim 1 or 2, wherein the upper surface side of (5) is disengaged. 4. The flange case (1) is elastically sandwiched between the contact member (17) and the outward flange (5) from above and below, so that the flange case (1) is attached to the ceiling. The device is detachably attached to the (A) side.
Flange case mounting structure for the described lighting equipment.