JPS63226807A - 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 Industrial Application) The present invention relates to an elevating device that is used in ceiling lighting equipment and the like and is designed to prevent an elevating part from falling.

(Prior Art) This type of lighting fixture is described in, for example, Japanese Utility Model Publication No. 60-37762. This device has an enlarged part on a part of the pair of cables that engage with the pulley in the lifting section, and a stopper is provided near the pulley, so that even if the cable should break during use, The enlarged portion is locked by the stopper to prevent the elevating portion from falling and to prevent danger.

(Problems to be Solved by the Invention) In the above-mentioned lifting device, a stopper must be specially provided as a fall prevention means, which has the drawbacks of complicating the structure, making it troublesome to manufacture, and reducing effectiveness.

SUMMARY OF THE INVENTION The present invention aims to eliminate the above-mentioned drawbacks and to provide a lifting device in which falling can be prevented using inexpensive means.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a through-hole for a cable that suspends an elevating part in the elevating part. It is characterized in that the enlarged part provided at the hanging part of the strip is so large that it does not penetrate.

(Function) Since the through hole of the cable provided in the lifting section itself is used as a stopper, there is no special need for a stopper member, and a lifting device equipped with a fall prevention mechanism can be manufactured with a simple structure and at low cost. It becomes possible.

(Example) An example of the present invention will be described with reference to FIGS. 1 and 2.

1 is a winding device; 2 is a pair of cables; one end of each cable 2 is wound on the winding device 1; the other ends are connected to each other and are suspended; It has an enlarged portion 4 in the middle of the hanging portion 3. Reference numeral 5 designates an elevating section, which accommodates the enlarged portion 4 therein, has a pulley 6 therein that fits into the hanging portion 3, and has a through hole 7 roughly.
It is suspended by a pair of ropes 2 with a . The above through hole 7
Although the cable 2 passes through the cable, the ampulla 4 is formed in such a size that it cannot be penetrated.

To roughly explain the above embodiment in detail, in this embodiment, the winding device 1 includes a pair of winding drums 8, a conductor (not shown) having a shaft 9 that interlocks the drums 8, and a guide roller 10. and is fixed to the substrate 11. Further, reference numeral 12 denotes a contact portion, which has a fixed contact 13. 14 is a guide part of the elevating part 5. On the other hand, the elevating part 5 has a movable contact 16 facing the fixed contact 13, and a pair of pulleys 5 are provided spaced apart, and the hanging part 3 of the cable 2 fitted with these pulleys 5 is enlarged. Part 4 is
It is located between a pair of pulleys 5. In addition, 17 is a lighting fixture, which is fixed to the lower surface of the elevating part 5, and 18 is a shaft 9.
This is a support part that supports the middle of the .

Next, the operation of the above embodiment will be explained. By winding and unwinding the cable 2 with the winding device 1, the elevating section 5 is raised and lowered. The lighting fixture 17 is energized by the lifting portion 5 rising to its highest point and the fixed contact 15 and the movable contact 16 coming into contact. Normally, in this state, the elevating section 5 is locked by a locking mechanism (not shown).

Next, while the elevating unit 3 is ascending and descending, the pair of cables 2
If for some reason the length is unbalanced and the elevating section is tilted, the action of the pulley 6 will automatically correct the inclination of the elevating section 3 and restore the normal state. Zarani, cable 2
If you disconnect it while it is in use, for example,
In the figure, when the right side of the enlarged part 4 is cut in the middle, the enlarged part 4 is locked in the through hole 7 on the left side of the elevating part 3, thereby preventing the elevating part 3 from falling. Since the through hole 7 of the cable 2 provided in the elevating part 3 is used as a stopper and no separate stopper is provided, the structure is simple.

Note that the enlarged portion 4 can be made more inexpensive if a metal fitting for connecting a pair of cables is used.

Furthermore, if a return fitting is used as the connection fitting, that is, the enlarged portion 4, the twisting of the pair of cables 2 can be absorbed by the return fitting, and the rotation of the lighting fixture 17 in the plane can be prevented. It can be prevented.

In addition, for a pair of cables 2, one twists in the S direction and the other in the 7 direction, that is, if they are made in opposite directions, the twist directions of the respective cables 2 will cancel each other out. Therefore, rotation of the lighting fixture 17 can be similarly prevented.

Furthermore, FIG. 3 shows another embodiment, in which the same parts are given the same reference numerals and detailed explanation will be omitted. In this embodiment, there is only one pulley 6, and the enlarged portion 4 is located between the pulley 6 and the through hole 7.

By cutting the cable 2, the enlarged portion 4 is similarly locked in the through hole, and the lifting portion 3 is prevented from falling. Note that the number of the winding drum 10 of the winding device 1 may be one.

In that case, a pair of cables 2 derived from the winding drum 10
In order to maintain appropriate intervals, the winding drum 10
A pair of guide rollers 12 may be disposed at a distance in front of the winding drum 10, and each roller 12 may guide the pair of cables 2 led out from the winding drum 10. Further, instead of providing a pair of through holes 7, it is sufficient to provide only one single slit through which each cable 2 passes. in this case,
Since the through-hole 7 is weak in strength, it is not suitable for a heavy device to be attached to the elevating section 5.

(Effects of the Invention) As described in detail above, in the present invention, when providing a through hole for a pair of cables that suspends an elevating part in the elevating part, the pair of cables pass through the through hole. Since the enlarged part is formed to a size that cannot be penetrated, the through hole of the cable provided in the elevating part itself can be used as a part of the stopper, and no special stopper member is required. Therefore, a lifting device equipped with fall prevention means can be manufactured with a simple structure and at low cost.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front sectional view of one embodiment of the present invention, and FIG.
Similarly, the figures are a partially cutaway side view, and FIG. 3 is a partially cutaway front sectional view of another embodiment. DESCRIPTION OF SYMBOLS 1... Winding device, 2... Cable, 3... Drooping part. 4... Ampullary part, 5... Lifting part, 6... Pulley. 7...Through hole. Patent Applicant Toshiba Electric Materials Corporation Agent Patent Attorney Ono 1) Yoshihiro 1 Figure

Claims (1)

[Scope of Claims] A winding device; one end of each is wound on the winding device, and the other ends are connected to each other and are suspended, and a winding device is provided in the middle of the hanging portion. A pair of cables having an ampulla; The ampulla is housed inside and has a pulley therein that fits into the hanging part of the cable, and the pair of cables penetrate through the ampulla. An elevating and lowering device comprising: an elevating part suspended by the pair of cables, the part having a through hole for the pair of cables formed in a size that cannot be penetrated.