JPS603722B2 - lift device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an elevating device used for elevating lighting equipment, for example, in which the rotational force of a winding roll, which is a mechanical component of the elevating device, can be easily adjusted using a square nut, and the lifting device can be easily adjusted with a square nut. The purpose of this invention is to easily accommodate weight differences, to securely prevent the square nut from loosening, to stabilize the rotating force of the winding roll, and to simplify the lifting device mechanism.

Conventional lifting and lowering devices have the ability to adjust the rotating force of the take-up roll, and generally the purpose was achieved by adjusting the tightening force using a square nut, but attention has been paid to preventing the square nut from loosening. There is no such thing, and the problem is that the square nut loosens after long-term use, changing the rotational force of the take-up roll and causing the suspended article to sag. Furthermore, since both ends of the shaft that are suitable for insertion into the winding reel must be supported, the mechanism becomes complicated and assembly workability becomes poor. The present invention aims to fundamentally eliminate the above-mentioned drawbacks, and will be explained below based on examples.

In the drawings, reference numerals 1 and 1' designate metal covers coupled together in a pair. Reference numeral 2 denotes a shaft, which has at one end a hoe branch 3 whose both sides are cut flat, and after inserting this rattan branch 3 into the largest hole 4 formed in the cover 1, an E-ring 5 is formed on the shaft branch 3. By press-fitting the shaft 2 into the groove 6
One end of the cover 1 is supported by the cover 1 and fixed so that it cannot be rotated.

Reference numeral 7 is a winding roll made of synthetic resin, which is housed between the covers 1 and 1', and is rotatably inserted through the shaft 2.

Wires 8 and 8' are wound around the winding reel 7.

Reference numeral 9 denotes a spiral spring whose internal circumferential device (not shown) is inserted into the groove 10 of the shaft 2, and whose outer circumferential end (also not shown) is hooked and fixed to the inner circumferential surface of the winding roll 7. Provides rotational return force. Reference numeral 11 denotes a movable rotor, and a protrusion 12 on its outer periphery is accommodated in a movable groove 13 formed on the inner circumferential surface of the winding IJ roll 7, and between it and a partition plate 14 formed at the center of the winding roll 7. It is biased in the mouse direction by a coil spring 15 housed in.

A rotor 16 is rotatably inserted into the other end of the shaft 2, and is sandwiched between friction plates 17 and 18 on both sides.

These friction plates have elongated holes, and both sides of the other end of the shaft 2 are cut flat, so that they are inserted into the shaft 2 in a non-rotatable manner. The rotor 16 has an engaging pawl 19 on one side thereof, which engages with an engaging pawl 20 provided on one side of the movable rotor 11. 21 is a disc spring, and 22 is a square nut.

The square nut 22 is screwed into the threaded part 23 at the other end of the shaft 2, and the friction plates 17 and 18 are connected to the rotor 1 via the disc spring 21.
The rotating force of the winding roll 7 is adjusted through the rotor 16 and the movable rotor 11. Note that the center of the shaft 2 has a large diameter portion 24, on which a friction plate 17 is abutted. The square nut 22 is inserted into a round hole 25 formed in the cover 1', and the other end of the shaft 2 is pivotally supported within the round hole 25 through the square nut 22.
26 is a drum that protects mechanical parts.

Reinforcement plates 27 and 27' are attached to both end surfaces of the winding roll 7.

Reference numeral 28 in FIG. 1 is a chassis to which covers 1 and 1' are attached, and wires 8 and 8' are suspended downward through pulleys 29 and 29' provided at both ends of the chassis. The operation of this elevating device is such that when the wires 8, 8' are pulled, the movable rotor 11 is rotated as the winding roll 7 rotates, and the engaging pawl 20 of the movable rotor 11 rotates. Engagement claw 1 of child 16
9 are engaged, and the rotor 16 whose rotational force is controlled by the friction plates 17 and 18 rotates, and the wires 8 and 8' are fed out.

Also, when winding wires 8 and 8', wires 8 and 8'
' is lifted (lifted as a result of lifting a hanging article (not shown)), the winding roll 7 is rotated by the rotation return force of the spiral spring 9, and the movable rotor 11 and the rotor are lifted. Unlike the previous case, the engaging claws 19 and 20 rotate in a direction that allows them to slide on the double slope without interlocking with each other, unlike the previous case, so that the winding roll 7 can be rolled. In this case, the movable rotor 11 performs an axial piston movement against the biasing force of the coil spring 15. Since the square nut 22 controls the rotational force of the rotor 16 by its vertical pressure,
Furthermore, the rotating force of the winding roll 7 can be adjusted, and the role is to adjust an appropriate vertical pressure in accordance with the weight of the suspended article. With the above configuration, the present invention provides the following complex effects.

1. As mentioned above, since the rotational force of the winding roll 7 can be easily adjusted using the square nut 22, it is possible to obtain an appropriate vertical pressure depending on the weight of the suspended article.

2. Since the square nut 22 is inserted into the round hole 25 of the cover 1', the outer peripheral edge (corner part) of the square nut 22
Since the square nut 22 bites into the inner circumferential surface of the round hole 25, it is possible to prevent the square nut 22 from loosening, and there is an advantage that the hanging article does not sag even after long-term use.

The reason why the square nut 22 bites into the round hole 25 is because the weight of the suspended article acts on the winding roll 7 eccentrically through the wires 8 and 8'. This is because force acts on it. 3. Only one end of the shaft 2 needs to be firmly supported, and the other end of the shaft 2 is simply inserted into the round shaft 25 via the square nut 22, which simplifies the mechanism and reduces assembly work. It also has the advantage of being easier.

[Brief explanation of the drawing]

FIG. 1 is a front view of the lifting device of the present invention, FIG. 2 is a half sectional view on both sides, and FIG. 3 is a perspective view when the same is disassembled. 1, 1'...Cover, 2...Shaft, 3...Tai branch,
7... Winding roll, 8, 8'... Wire 1, 22...' Square nut, 23... Threaded part, 25... ...Round hole. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1 a cover, a shaft with one end pivotally supported on the cover, a take-up reel rotatably inserted through the shaft, a wire wound around the take-up reel, and a wire screwed onto the other end of the shaft. 1. A lifting device comprising a square nut for adjusting the rotational force of a take-up reel, characterized in that the square nut is inserted into a round hole formed in the cover.