JP2604136B2 - lift device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Technical Field to which the Invention Belongs) The present invention relates to a vertically illuminating device mounted on a ceiling or the like in a room.

(Prior art) Conventionally, as this type of elevating type lighting device, for example,
The thing described in 60-153431 is known.
(Hereinafter, this is referred to as Conventional Technology 1.)
A moving pulley is provided on the elevating portion, and the intermediate portion of the cable is engaged with the moving pulley to suspend the elevating portion. One end of the cable is wound by a single drum disposed on the fixed portion side, and the other end is attached to the fixed portion. In addition, a contact for electrical connection with the elevating section is provided between the cables of the fixed section, and when the elevating section reaches the highest position, this contact comes into contact with the contact on the elevating section side. Electrical connection is made.

Further, as another elevating type lighting device, one described in Japanese Utility Model Publication No. 60-37762 is known. (Hereinafter, this will be referred to as conventional technology 2.) This lifting-type lighting device includes a drum fixed to output shafts at both left and right ends of a motor disposed in a base (box) mounted on the ceiling side, and both ends. Are wound on a pair of drums, respectively, and include a rope suspended from the base at an intermediate portion thereof, and an elevating portion having a pulley engaged with the intermediate portion of the rope. In this elevating lighting device, since both ends of the cable are wound by a pair of drums, the winding amount of each drum can be reduced by half as compared with the case of winding a single drum.

An electric winch, which is not an elevation lighting device but is used for suspending a measuring instrument in underground construction or the like, is disclosed in Japanese Utility Model Publication No. 53-48426. (Hereinafter, this will be referred to as prior art 3.) This electric winch winds up the ends of the ropes by a pair of drums which are arranged left and right, and the other ends of these ropes are intermediate sheaves and guides. It is hung downward through a sheave and suspends the suspended body. According to this electric winch, the lateral movement of the wire in the fleet angle of the drum can be absorbed by the intermediate sheave, so that the swinging and heaving of the suspended body can be reduced.

(Problem to be Solved by the Invention) In the elevating lighting device of the prior art 1, the other end of the rope engaged with the moving pulley of the elevating portion is fixed to the fixed portion, so that the elevating portion moves up and down. Sometimes one of the sheaves is always hung by a cable. As a result, the lifting unit may swing so as to incline in a direction in which one of the moving pulleys is hung, and the lifting operation becomes unstable. In particular, when the elevating unit swings up and rises near the highest position (top dead center), the contact of the fixed unit and the contact of the elevating unit do not make good contact, which hinders electrical connection.

Further, if the rope is not wound up uniformly on the drum, the rope becomes partially bulged at the winding portion. The part cuts into the winding part, which hinders the unwinding of the cord. In addition, there is a problem that the speed of lifting and lowering is low because the cable is wound by a single drum.

The up-and-down lighting device of the prior art 2 can wind up both ends of a wire with a pair of drums, so that the up and down time can be reduced, but it has the following problems.

In other words, since the elevating unit is directly hung by the drum, the rope moves right and left in the drum when winding and unwinding, and this is directly transmitted to the elevating unit. In addition, since both ends of the cable are wound, the roll of the cable is promoted in comparison with a structure in which one end is wound as in the prior art 1, and it is easy to induce the cable to be wound unevenly on the drum. .

Also, since a pair of drums are fixed to the driving shafts at the left and right ends of the motor respectively, two drums are inevitably required, which increases the cost. In addition, the drums, which are relatively many components, are spaced apart from each other. Therefore, miniaturization of the overall size of the apparatus is hindered.

Furthermore, in order to stably lift the elevating section, it is useful to increase the distance between the cords. However, if the distance between the pair of drums is increased, the size of the apparatus is further increased. There are evils.

The electric winch according to the prior art 3 winds up two wires with two drums, respectively, and has a problem that the elevating speed is slow as in the prior art. Furthermore, since the two drums are spaced apart, it is difficult to reduce the size of the entire apparatus.

An object of the present invention is to provide an elevating lighting device that can solve the above-described problems.

[Structure of the Invention] (Means for Solving the Problems) The elevating lighting apparatus of the present invention is mounted on a ceiling side, and is disposed between a direction changing guide roller, a pair of guide rollers, and the pair of guide rollers. A base provided with fixed contacts; an electric motor provided in the base; a pair of drums connected to a driving shaft on one side of the electric motor; and both ends wound on the pair of drums, respectively. And a rope whose width is wider than a winding distance of the drum by the direction changing guide roller, and a middle part of which is suspended from the base via a pair of guide rollers; A moving pulley to be engaged with, and a movable contact provided, and an elevating unit suspended by the cable so that the movable contact is raised by winding the pair of drums and the movable contact comes into contact with the fixed contact; Take Characterized by comprising a; and vignetting luminaire.

In the present invention, a pair of direction change guide rollers may be provided in correspondence with each of the ropes led out from the drum, but may be provided in correspondence with only one of them so as to widen the distance between the ropes.

Further, the pair of drums may be formed individually or integrally.

Further, the winding interval of the drum means an interval between the winding surface ends of the drums that are not adjacent to each other, that is, it corresponds to the maximum interval between the ropes derived from the pair of drums.

According to the present invention, since the rope engaged with the moving pulley of the elevating unit is wound at both ends simultaneously, the moving pulley is less likely to be wound around the rope when the elevating unit moves up and down, and the inclination of the elevating unit is reduced. And swing can be reduced. Therefore, the connection between the contact of the fixed portion and the contact of the lifting / lowering portion can be favorably performed.

Also, compared to a cable with one end fixed,
The amount of cable wound on the drum can be reduced by half, the lifting time can be reduced by half, and the rise of the cable wound on the drum is also relatively small, so that it is difficult for the cable to bite and good unwinding is possible. Can do.

In addition, since the middle portion of the rope passes through a pair of guide rollers, its position is hung down from the base body while its position is regulated, so that the side of the elevating portion which is promoted when winding or unwinding both ends of the rope is promoted. Shaking can be reduced.

Further, since the pair of drums for winding both ends of the cable are provided on one side of the electric motor so as to be connected to the driving shaft, the manufacturing cost can be reduced when the pair of drums are integrally formed. In addition, the size of the entire device can be reduced by being provided collectively on one side of the electric motor. Furthermore, when a pair of drums are collectively provided on one side of the electric motor in this way, the spacing between the cords is reduced, but the cords are turned by the turning guide rollers, and the gap is widened. The spacing between the ropes that suspend the elevating unit can be made sufficiently large, and the elevating unit can be stably moved up and down.

(Embodiment of the Invention) An embodiment of a lifting-type lighting device according to the present invention will be described with reference to FIGS.

FIG. 1 is a side view of the elevation type lighting apparatus excluding a side plate of a base, FIG. 2 is a top view of the same main part, FIG. 3 is a cross-sectional view of the main part seen from the direction of arrow A in FIG. FIG. 4 is a side view excluding the side plate of the base body in a state where the elevating unit is lowered.

In the drawing, reference numerals 1 and 1 denote a pair of drums provided in connection with a driving shaft 2a on one side of the electric motor 2. The driving shaft of this electric motor 2
2a extends in one lateral direction in the base 4.
The drums 1 and 1 have a structure in which a pair of drums are integrally formed so as to be connected to each other, and are separated into respective winding portions by a partition plate 1a. Numeral 3 is a cable whose both ends are wound around the drums 1 and 1, respectively. The electric motor 2 is fixed to a base 4, and the base 4 is attached to, for example, a ceiling surface or a beam (not shown).

Reference numerals 5 and 5 denote direction changing guide rollers which are provided on the base 4 and engage the ropes 3 unwound from the drums 1 and 1 to change the extending direction thereof. Since the direction changing guide rollers 5 and 5 have their rotating shafts mounted in the direction perpendicular to the moving shaft 2a of the electric motor 2, they rotate horizontally in the roller base 4 to move the rope 3 horizontally. It has the effect of inducing bending in the direction. This direction changing guide roller 5,
The cable 3 is guided to the electric motor 2 by 5 so that the distance between the cables 3 is wider than the winding distance between the pair of drums 1, 1. Reference numerals 6 and 6 denote a pair of guide rollers for engaging the ropes 3 turned by the direction changing guide rollers 5 and 5 so as to hang down below the base 4. The guide rollers 6, 6
Is mounted so that the rotating shaft of the roller is oriented in the direction parallel to the moving shaft 2a of the electric motor 2, so that the roller rotates vertically in the base 4 and guides the cable 3 to bend in the vertical direction. Have.

An elevating unit 7 is suspended at an intermediate portion of the rope 3 suspended through the guide rollers 6. A pair of moving pulleys 8 and 8 are mounted inside the elevating unit 7,
Are engaged with these moving pulleys 8,8. Each of the movable pulleys 8 and 8 is provided at a position where the weight of the elevating unit 7 can be balanced. In addition, if the weight balance is taken, only one pulley 8 may be used. A lighting device (not shown) such as a HID lamp floodlight is attached to the elevating unit 7.

Further, a pair of fixed contacts 9, 9 are provided inside the base 4, and movable contacts 10, 10 are provided above the elevating unit 7 so as to face the fixed contacts 9, 9. The fixed contacts 9 and 9 and the movable contacts 10 and 10 come into contact and are electrically connected to each other when the elevating unit 7 reaches the top dead center where the ascending and descending unit 7 has completed the ascending operation. Since the movable contacts 10 and 10 incorporate springs 11 and 11 that allow the contact portions to move up and down, the fixed contacts 9 and 9 and the movable contacts 10 and 10 reliably contact with a desired contact pressure. Can be done.

According to this embodiment, the space between the cords unwound from the drum is widened toward the electric motor by the direction changing guide roller, so that the space in the base can be effectively used and the apparatus can be downsized.

(Effects of the Invention) According to the present invention, it is possible to provide a liftable lighting device having the effects listed below at the same time.

Since both ends of the cable are wound simultaneously on the pair of drums, the inclination and swing of the elevating part during the elevating operation can be reduced, and the electrical connection between the contact of the fixed part and the contact of the elevating part can be made well.

The amount of rope wound around each drum can be halved, and the elevating time can be halved, and bite of the rope is less likely to occur, so that good unwinding can be performed.

Since the middle part of the rope is suspended from the base via the guide roller, even when both ends of the rope are simultaneously wound or unwound, the horizontal movement of the elevating part can be reduced.

The pair of drums that wind both ends of the cable are provided in connection with the driving shaft on one side of the electric motor, so that the size of the entire instrument can be reduced, and if the pair of drums are integrally formed, it is manufactured. Cost can be reduced. In addition, since the ropes unwound from the pair of drums at relatively narrow intervals are turned by the direction changing guide rollers and engaged with the pair of guide rollers arranged at the required interval to be drooped, Even though the drums are provided on one side of the electric motor, the interval between the ropes suspending the elevating unit can be made sufficiently large, and the swing of the elevating unit in accordance with the elevating operation can be sufficiently and sufficiently suppressed.

[Brief description of the drawings]

FIG. 1 is a side view of a base according to an embodiment of the present invention excluding a side plate, FIG. 2 is a top view of the same main part, FIG. 3 is a cross-sectional view of the main part viewed from the direction of arrow A in FIG. FIG. 4 is a side view showing a state where the elevating unit is lowered, excluding a side plate of the base. 1, 1... Drum 2... Electric motor 2a... Moving shaft 3... Rope 4... Base 5, 5... Guide rollers 6, 6. 9, 9 ... fixed contact 10, 10 ... moving contact

Continuation of the front page (56) References Japanese Utility Model Showa 60-59311 (JP, U) Japanese Utility Model Showa 60-153431 (JP, U) Japanese Utility Model Showa 62-56584 (JP, U) Japanese Utility Model Showa 56-29091 (JP, U) , U) Jiko 60-37762 (JP, Y2) Jiko 53-48426 (JP, Y2) Jiko 59-23285 (JP, Y2) Jiko 59-28567 (JP, Y2)

Claims (1)

(57) [Claims] A base mounted on the ceiling side and provided with a direction changing guide roller, a pair of guide rollers, and fixed contacts disposed between the pair of guide rollers; and an electric motor provided in the base. A pair of drums provided so as to be connected to a driving shaft on one side of the electric motor; both end portions are wound around the pair of drums, respectively, and the direction changing guide rollers are arranged so as to be closer to each other than a winding interval of the drums; A cable having a widened interval and an intermediate portion hanging down from the base via a pair of guide rollers; a movable pulley engaging with the intermediate portion of the cable, and a movable contact; An elevating portion suspended by the cable so that the movable contact comes into contact with the fixed contact by being wound by winding the lighting device; and a lighting fixture attached to the elevating portion. Akira apparatus.