JPH05325623A - Lifting device for luminaire - Google Patents

Abstract

PURPOSE:To provide a thin type lifting device for a luminaire capable of smoothly lifting or lowering the luminaire and capable of reducing the height size most affecting the fitting of the luminaire. CONSTITUTION:The portion winding a wire rope 5 suspending a luminaire 4 at the lower end is constituted of a timing belt 15 and multiple timing belt pulleys 13, 14, and the winding length of the wire rope 5 is secured to the length of the timing belt 15. The winding width of the wire rope 5 can be made small, the winding diameter of the wire rope 5 can be kept small, thus a lifting device 8 for a luminaire can be made thin and small in the height size, the maximum inclination angle and the fleet angle of the wire rope 5 are kept small, the wire rope 5 is nearly uniformly wound, and the luminaire 4 is smoothly lifted or lowered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture lifting device for a lighting fixture that can be raised and lowered by winding and feeding a wire rope.

[0002]

2. Description of the Related Art Generally, a relatively large luminaire installed on a high ceiling of a gymnasium, a factory, etc. is provided with a lifting device on the ceiling so that maintenance and inspection can be performed on the floor. Many are hung vertically.

In such a lifting device for lighting equipment, at the time of maintenance / inspection, a wire rope wound around a winding drum fixed to the ceiling is gradually fed by a driving force of a motor or the like, When the lighting fixture connected to the lower end of the rope is lowered to the floor surface and the maintenance and inspection of this lighting fixture are completed as required, the winding cylinder is reversed and the wire rope is rewound to position the lighting fixture at a predetermined position. It is designed to be raised up to.

By the way, when the above lighting equipment is raised,
The winding diameter and the winding width of the wire rope wound around the winding drum gradually increase, and the lighting device tends to swing in the horizontal direction according to the changes in the winding diameter and the winding width.

When the lighting fixture swings in the horizontal direction during winding, it becomes difficult to wind the wire rope around the winding cylinder almost uniformly. Therefore, as shown in FIG. 4, conventionally, as shown in FIG. Winding drum 3 and lighting fixture 4 with guide members 1 and 2
The middle part of the wire rope 5 which is continuously connected with is temporarily supported so that the lighting device 4 can be gently lifted up without moving horizontally in the vertical direction during winding.

However, if the distance lg between the winding drum 3 and the guide member 1 is relatively short, the maximum inclination angle θ of the wire rope 5 between the winding drum 3 and the guide member 1, that is, the luminaire 4 is set. Of the wire rope 5 between the winding drum 3 and the guide member 1 when the floor is lowered to the floor 6 (FIG. 4 (a)), the maximum inclination during winding (FIG. 4 (b)) Since the angle θ becomes large, the tangent position of the wire rope 5 with respect to the winding drum 3 is changed from the state of FIG.
It greatly fluctuates until it shifts to the state of (b), and
Fleet angle θ in the width direction of the winding drum 3 generated by winding the wire rope 5 around the winding drum 3.
F also greatly changes, and it becomes difficult to wind the wire rope 5 around the winding drum 3 almost uniformly.

When the wire ropes 5 are wound non-uniformly, so-called biting occurs between the wire ropes 5 during the winding, and the wire ropes 5 wound around the winding drum 3 are disengaged. When attempting to lower the lighting fixture 4, it becomes difficult for the wire rope 5 at the biting portion to be smoothly disengaged, which hinders not only the lowering operation but also the ascending operation.

Incidentally, such a phenomenon also appears when a heavy object is hoisted by an elevating device such as a hoist.

As a measure against this, if the distance lg between the winding drum 3 and the guide member 1 is sufficiently secured, the maximum inclination angle θ and the fleet angle θF can be made relatively small, but in general, illumination is required. Since multiple fixtures are hung vertically on the ceiling of the building, each occupying space is limited, and in consideration of mobility in hoists, downsizing is desirable. It is difficult to secure a sufficient distance lg.

Further, as shown in FIG. 3, in order to reduce the maximum inclination angle θ and the fleet angle θF of the wire rope 5 without increasing the distance between the winding drum and the guide member, the winding drum 7 having a large diameter is arranged. It is conceivable to install the wire rope 5 to secure the required winding length of the wire rope 5.

With such a structure, the maximum tilt angle θ and the fleet angle θF can be made small, and the lifting device can be made thin.

However, both the width w and the height h of the lifting device become large in accordance with the size of the winding cylinder 7. Here, since the lighting fixture 4 is vertically installed on the ceiling of the building and the lifting device is fixed above the lighting fixture 4, it is particularly difficult to secure a large height h of the lifting device.

[0013]

As described above, in the above-mentioned conventional technique, the distance lg between the winding drum and the guide member is sufficiently secured, and the maximum inclination angle θ and the fleet angle θF of the wire rope are reduced. An attempt to smoothly raise and lower the lighting fixture leads to an increase in the size of the lifting device for the lighting fixture. Further, the distance lg is made small and the lifting device for the lighting fixture is made thin by using a large diameter winding drum. However, there is a problem that the height h dimension, which most affects the mounting of the lighting fixture, becomes large.

The present invention has been made in view of the above circumstances, and the maximum inclination angle and fleet angle of the wire rope can be reduced to smoothly move up and down the lighting fixture, and the lighting fixture can be made thin. It is an object of the present invention to provide a lifting device for a lighting fixture that can reduce the height h dimension that most affects the mounting.

[0015]

In order to achieve the above-mentioned object, a lighting device lifting / lowering device according to the present invention is provided with at least one driving-side timing belt pulley which is disposed above and which is directly connected to drive means. Two driven-side timing belt pulleys, a timing belt wound between the driving-side timing belt pulley and the driven-side timing belt pulley, and the upper end of the timing belt is hooked on the timing belt and the lighting fixture is hung at the lower end. A wire rope that can be freely wound around the outer circumference of the timing belt is provided.

[0016]

[Operation] In the above structure, when the driving means is rotated so as to raise the lighting fixture which is hung down from the lower end of the wire rope to the lowest position, the driving mechanism connected to the driving means is rotated. The side timing belt pulley rotates, and the timing belt causes at least one driven side timing belt pulley to rotate.

Then, the wire rope hooked on the timing belt is wound around the outer circumference of the timing belt to raise the lighting fixture.

Since the winding length of the wire rope is longer than that of the timing belt, the winding width of the wire rope can be small, and the winding diameter of the wire rope is also small. Since it does not become so large, it is possible to make the lifting device for lighting fixtures thin and reduce the height dimension, and to wind the wire rope almost uniformly while keeping the maximum inclination angle and fleet angle of the wire rope small.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention. FIG. 1 is a perspective view of a state in which a lifting device for lighting equipment is used, and FIG.

(Structure) Reference numeral 8 in the drawing is a lifting device for lighting equipment, and a support arm 10 fixed to the upper part of a device body 9 of the lifting device 8 for lighting equipment has a high ceiling in a gymnasium or factory not shown. It is fixed to the beam, etc.

A motor bracket 11 is attached to the apparatus body 9.
A low speed motor 12 as an example of a driving means is fixedly installed on the motor bracket 11, and a main drive side timing belt pulley 13 is mounted on a spindle (not shown) of the low speed motor 12.

Further, a driven side timing belt pulley 14 is arranged in parallel to the side of the driving side timing belt pulley 13, and the driven side timing belt pulley 1 is provided.
3 and the driven side timing belt pulley 14 are configured such that a timing belt 15 is wound around and the power from the driving side timing belt pulley 13 is transmitted to the driven side timing belt pulley 14.

In this embodiment, the number of driven side timing belt pulleys 14 is one, and a plurality of driven side timing belt pulleys 14 may be arranged. Further, a constant tension is applied between the driving side timing belt pulley 13 and the driven side timing belt pulley 14 by means such as a spring (not shown) in the direction of separating the shafts, and the timing belt 15 has a fixed tension. The tension is kept constant. Further, the tooth number ratio between the driving side timing belt pulley 13 and the driven side timing belt pulley 14, that is, the reduction ratio, is the output of the low speed motor 12, the number of rotations, and the weight of the load.
Here, the weight is set according to the weight of the lighting fixture 4, the conditions of the selected timing belt 15 (belt length, belt width, belt material, etc.), and in the present embodiment, it is set to 1: 1.

Further, at an arbitrary hooking portion 16 provided on the timing belt 15, the upper end of the wire rope 5 is hooked around the outer circumference of the timing belt 15 so that the wire rope 5 can be freely wound. The luminaire 4 is hung vertically below the device body 9 while being supported by sheaves 1 and 2 provided on the body 9 by fixtures (not shown).

Here, the sheave 1 is for absorbing a slight maximum inclination angle and fleet angle of the wire rope 5 generated when the wire rope 5 is wound around the outer periphery of the timing belt 15. The sheave 2 is for guiding the wire rope 5 at a fixed position vertically below the apparatus body 9.

A position detector (not shown) such as a limit switch for detecting the position of the lighting fixture 4 is provided in the device body 9 of the lighting fixture lifting device 8. .. A motor switch (not shown) that controls the rotation of the low-speed motor 12 is provided outside the lighting device elevating / lowering device 8 at a position where a person can operate it.

(Operation) Next, the operation of the embodiment having the above construction will be described.

Support arm 10 on the high ceiling of gymnasiums, factories, etc.
When performing maintenance / inspection of the lighting fixture 4 installed via the, a low speed incorporated in the lighting fixture elevating device 8 for turning on the lighting fixture 4 by turning on a motor switch (not shown) in the DOWN direction. Timing belt pulley 13 on the driving side, which is attached to a spindle (not shown) of the motor 12
Slowly rotate.

Then, the driven side timing belt pulley 14 is also rotated by the timing belt 15, and at the same time, the wire rope 5 wound around the outer periphery of the timing belt 15 is gradually fed downward through the sheaves 1 and 2. The lighting fixture 4 connected to the lower end of the wire rope 5 is gradually lowered, and when the lighting fixture 4 reaches a certain height, the motor switch is turned off, and the driving side timing belt pulley 13 is turned on. And the timing belt 15 is stopped.

When the timing belt 15 is stopped and the wire rope 5 wound around the outer circumference of the timing belt 15 is disengaged, the upper end portion of the wire rope 5 has the timing belt 15 It is securely hooked by an arbitrary hooking portion 16 provided on the.

When the maintenance / inspection of the lighting fixture 4 is completed in a predetermined manner, the motor switch is turned on.
Is turned on in the reverse direction to the direction in which is lowered, the driven side timing belt pulley 14 is rotated in the reverse direction, and the timing belt 15 is rotated in the reverse direction.

Then, the wire rope 5 for suspending the lighting fixture 4 starts to be wound around the outer periphery of the timing belt 15 via the sheaves 1 and 2.

Since the winding length of the wire rope 5 is longer than the length of the timing belt 15, the winding width of the wire rope 5 can be small.
Moreover, since the winding diameter of the wire rope 5 does not become so large, the device main body 9 of the lighting fixture elevating device 8 can be thin and the height h can be reduced. This wire rope 5
The wire rope 5 is wound almost uniformly while keeping the maximum inclination angle and the fleet angle of the wire rope small.

Then, the wire rope 5 is wound around the outer periphery of the timing belt 15, and the lighting fixture 4
Slowly rises, and it is detected that the upper part of the main body of the lighting fixture 4 has reached a preset uppermost position by a position detector (not shown) provided in the device main body 9 of the lighting fixture lifting device 8. Then, the low speed motor 12 is stopped by the signal from the position detector and the rotation of the timing belt 15 is stopped.

Since the wire rope 5 is wound by the timing belt 15, the timing belt pulley 13 on the driving side and the driven side on the driven side are matched with the installation location of the device body 9 of the lifting device 8 for the lighting fixture. By arranging the timing belt pulley 14, it is possible to effectively use the dead space such as the ceiling.

Further, since the reduction ratio of the driving side timing belt pulley 13 and the driven side timing belt pulley 14 can be set arbitrarily, the range of selection of the driving means can be expanded, and a smaller lighting apparatus lifting device can be realized. You can also do it.

Further, since the wire rope 5 is wound by the timing belt 15 instead of the friction transmission such as the flat belt or the V belt which is an example of the winding transmission, the timing belt pulleys 13 and 14 and the timing belt 15 are used. There is no slip between the two and the safety is very high.

[0039]

As described above, according to the present invention, the wire rope winding portion of the lighting fixture lifting device is composed of the timing belt and the plurality of timing belt pulleys. The maximum tilt angle and fleet angle with respect to the diameter can be reduced to allow smooth lifting and lowering of lighting equipment, and it is thin and
This has excellent effects such that the height h dimension that most affects the mounting of the lighting fixture can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a usage state of a lifting device for a lighting device according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining a configuration and an operation according to an embodiment of the present invention.

FIG. 3 is an explanatory view of a lifting device for a lighting fixture using a conventional large diameter winding drum.

4A and 4B are explanatory views of a conventional lifting device for a lighting fixture, in which FIG. 4A is a diagram in which the lighting fixture is lowered to a floor surface, and FIG. 4B is a diagram in which the lighting fixture is raised to the uppermost position.

[Explanation of symbols]

 4 Lighting Equipment 5 Wire Rope 8 Lifting Device for Lighting Equipment 12 Drive Means 13 Driving Side Timing Belt Pulley 14 Driven Side Timing Belt Pulley 15 Timing Belt

Claims (1)

[Claims] 1. A driving-side timing belt pulley, which is disposed above and which is directly connected to driving means, at least one driven-side timing belt pulley, the driving-side timing belt pulley, and the driven-side timing belt pulley. A timing belt wound between the timing belt and an upper end of the timing belt hooked on the timing belt, and a lighting fixture is provided at the lower end of the timing belt, and a wire rope that can be wound around the outer circumference of the timing belt. Lifting device for lighting equipment.