JPS63226808A - Electric lift - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric lifting device for holding lighting equipment in a room with a high ceiling, such as a gymnasium.

Conventional technology Lighting equipment installed in rooms with high ceilings is itself installed at a considerable height from the floor, so in order to replace the lamp or perform repairs or inspections, the lighting equipment is attached to a lifting device and raised and lowered. It is set freely. In such a lifting device, a lifting platform that holds a lighting device is connected to one end of a cable, and the cable is wound around a cable winding drum driven by a motor.

A conventional example will be explained based on FIG. 3. That is,
A motor 3 with a motor shaft 2 positioned horizontally on a frame 1 is fixed with mounting screws 4.

A cable winding drum 5 is fixed to the tip of the motor shaft 2, and a cable 6 is wound around the cable winding drum 5.

Problems to be Solved by the Invention Mounting screws 4 for fixing the motor 3 protrude from the surface of the frame 1 on the cable winding drum 5 side, and the flange of the cable winding drum 5 on the frame 1 side protrudes. 7 cannot be placed close to the frame 1, and a gap 8 is always required.

Therefore, it is easy for the cables 6 to become loose when lowering the lighting equipment and performing lamp replacement work, etc. In such cases, the cables 6 may climb over the flange 7 and loosen. A part of it may get into the gap 8. In such a case, there is a serious problem that the cable 6 may become wrapped around the motor shaft 2 and may be severed depending on the situation.

Means for solving the problem: An electric lifting device in which a cable take-up drum is attached to the motor shaft of a motor attached to a frame, and a lifting platform is connected to the tip of the cable wound around the cable take-up drum. In this case, a rib is formed protruding from the outer peripheral edge of the flange of the cable winding drum on the side of the frame, the leading edge of which is close to the frame.

A rib is formed on the flange on the frame side of the working cable take-up drum so that the leading edge is close to the frame, so that the cable taken out from the cable take-up drum can be easily connected to the cable take-up drum and the frame. This prevents the cable from falling into the gap between the motor shaft and the motor shaft, thereby providing high safety by preventing the cable from wrapping around the motor shaft.

Embodiment An embodiment of the present invention will be explained based on FIGS. 1 and 2. First, a frame 11 is attached inside an outer case 10 with an open bottom surface and a handle 9 attached to the upper end.

This frame 11 includes two opposing vertical side plates 13 fixed to the lower surface of the top plate 12 of the outer case 10, and a horizontal fixed plate 14 fixed to the lower ends of these side plates 13.
It consists of a vertical support plate 15 fixed under this fixed plate 14.

A motor 17 capable of forward and reverse rotation is fixed above one of the side plates 13 of the frame 11 with a mounting screw 16. A cable winding drum 20 around which a cable 19 is wound is fixed to the tip of the motor shaft 18 of the second motor 17 . At the flange 21 of the cable winding drum 20 on the frame 11 side.

An annular rib 22 is formed that protrudes from the outer peripheral edge toward the frame 11 side. The leading edge of this rib 22 is close to the frame 11.

Further, a holding plate 23 is attached below the side plate 13 of the frame 11, and a PC board 24 on which various electrical parts are attached is attached to this holding plate 23.

Next, the cable winding drum 2o is attached to the support plate 15.
Two guide pulleys 25 are rotatably attached to a support shaft 26 to change the direction of the cable 19 pulled out from the cable. A holding fitting 27 is attached to the outer periphery of these guide pulleys 25 to prevent the cable 19 from coming off.

Furthermore, a lifting platform 28 for holding a support such as a lighting fixture (not shown) is attached to the tip of the cable 19. This elevating table 28 is formed with an engaging stepped portion 29, and an engaging pawl 3 that engages with this engaging step portion 29 to hold the elevating table 28.
0 is provided on the support plate 15.

In such a configuration, the cable take-up drum 20 is rotated by driving the motor 17, and the cable 19 is unwound or wound up from the cable take-up drum 20, so that the lifting platform 28 is raised and lowered. When the lifting platform 28 is lowered to perform work such as lamp replacement, the suspended state by the cables 19 is released and the lifting platform 28 is held or placed on the floor, so that the cables 19 are loosened. occurs. If the motor 17 is started in such a state, the loose cable 19 may come off the flange 21 of the cable take-up drum 20; There is no problem as long as the cable 19 simply passes outside the cable take-up drum 20. Further, even if the cable 19 is located on the side plate 13 side, since the rib 22 exists, the cable 19 will ride on the outer circumference of the rib 22, and while the cable winding drum 20 is rotating, the cable 19 will be Because it receives a force that moves inward,
It will immediately return to the winding section. Therefore, it does not wrap around the motor shaft 18. Therefore, an accident in which the cable 19 is cut due to its wrapping around the motor shaft 18 is prevented.

Effects of the Invention In an electric lifting device in which a cable winding drum is attached to the motor shaft of a motor mounted on a frame, and a lifting platform is connected to the tip of the cable wound on the cable winding drum, the cable Since a protruding rib is formed on the outer circumferential edge of the flange of the winding drum on the frame side, the leading edge of which is close to the frame, the cable untied from the cable winding drum can be easily connected to the cable winding drum and the frame. This prevents the cable from falling into the gap between the cables and the motor shaft, thereby preventing the cable from wrapping around the motor shaft and causing a cutting accident, thereby achieving high safety.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a partially cutaway side view, FIG. 2 is an overall vertical side view, and FIG. 3 is a side view of a conventional example. DESCRIPTION OF SYMBOLS 11... Frame, 17... Motor, 18... Motor shaft, 19... Cable, 20... Cable winding drum,
21...flange, 22...rib, 28...lifting platform ratio Request person Toshiba Electric Materials Corporation, 7), I Figure

Claims (1)

[Claims] In an electric lifting device in which a cable take-up drum is attached to the motor shaft of a motor attached to a frame, and a lifting platform is connected to the tip of the cable wound on the cable take-up drum, the cable take-up drum An electric lifting device characterized in that a rib is formed protruding from the outer peripheral edge of the flange on the frame side, the tip end of which is close to the frame.