JPH0114616Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a brake device for a wall lift that moves up and down a substantially vertical wall of a power transmission line tower or the like along a guide rail.

Conventionally, this type of elevator lifts and lowers by controlling the forward and reverse rotation of the sprocket that engages with the guide rail by swinging the operating lever, and when the operating lever is in an intermediate position, a brake is applied to the rotation of the sprocket. It's summery. However, when the elevator moves from a stopped state to an ascending operation, the brake is released and the sprocket becomes temporarily free, resulting in a descending state, which poses a problem in that operation is difficult. This phenomenon occurs because the time for which the brake is held in a stopped state is short.

The present invention was developed by focusing on the above-mentioned problems with conventional brake devices for wall lifts.The above-mentioned problems are solved by reliably holding the brake in a stopped state until the sprocket starts rotating in the upward direction. It aims to solve the problem.

Embodiments of the present invention will be described below with reference to the figures. The cage 1 moves up and down along a guide rail laid approximately perpendicular to the wall surface while engaging the sprocket 2 with the pin rack. Sprocket 2 is cage 1
It is rotated by the upper drive device 3.

The drive device 3 consists of a small engine 4 with a drive pulley 5. The drive device 3 is mounted on the cage.
Although it is installed so as to maintain a horizontal state by a spring 6, it can swing toward and away from the sprocket 2 by swinging around a shaft 8 by an operating lever 7.

Passive pulley 9 that rotates integrally with sprocket 2
A belt 10 is wound between the drive pulley 5 of the drive device 3, and the sprocket 2 rotates in the normal direction, causing the cage 1 to rise. The drive pulley 5 can also press against the drive pulley 9 when the engine 4 is tilted, thereby causing the sprocket 2 to reverse and the cage 1 to be lowered. The belt support 11 holds the belt 10 when not needed.

A cylindrical case 12 is vertically fixed to the lower part of the passive pulley 9. A pair of longitudinal elongated holes 12a, 12a are bored in the opposite sides of the case 12, and a bottom cover 13 is screwably screwed into the bottom of the case 12.

The slide pin 14, whose lower portion is divided into two by a cut 14a, is inserted into the case 12 via a push spring 15 so as to be vertically movable. Slide pin 14
A female threaded portion 14b is provided at the upper portion of the lining base 16, and a male threaded portion 16a at the lower portion of the lining base 16 is screwed into this female threaded portion 14b. On the top surface of the lining base 16,
A friction member 17 that contacts the lower part of the driven pulley 9 and brakes it is detachably attached with a screw 18.

The lever 19 passes through the case 12 through long holes 12a, 12a. The intermediate portion of the lever 19 is inserted into the cutout 14a of the slide pin 14 within the case 12, and is pivotally attached to the slide pin 14 by a pivot pin 20. A long hole 19a is bored in the proximal end of the lever 19 on the side of the drive device 3, and a pin 21 implanted on the side of the drive device 3 is slidably engaged with this. Therefore, the lever 19 is
It can be rotated forward and backward about the pivot pin 20 in conjunction with the rocking of the drive device 3.

Lever receivers 22a and 22b are fixed to both sides of the case 12 and above the elongated holes 12a and 12a. The lower surfaces of these lever holders 22a, 22b are spaced apart from the upper edge of the horizontal lever 19, and when the lever 19 is rotated, the upper edge of the lever holder 22a, 22b is It is configured to abut against the lower surface.

Next, the action will be explained. FIG. 1 shows the machine in a stopped state, with the operating lever 7 standing vertically. In this state, the drive device 3 also stands upright, and since the distance between its drive pulley 5 and driven pulley 9 is narrow, the belt 10 is not stretched and the driven pulley 9 and sprocket 2 do not rotate. In this state, the lever 19 is in a horizontal state, the slide pin 14 is pushed up by the push spring 15 and is in the raised position, and the friction member 17 is pressed against the driven pulley. Therefore, rotation of the driven pulley 9 is prevented, the sprocket 2 cannot rotate, and the cage 1 is stopped. When the operating lever 7 is tilted in the direction of the arrow A from this state, the drive device 3 compresses the outer spring 6 and tilts around the shaft 8. Then, as the pin 21 rises, the lever 19 rotates counterclockwise about the pivot pin 20, and its upper edge on the driving device side comes into contact with one of the lever receivers 22a. Then, when the lever 19 further rotates, the lever 19 rotates using the lever holder 22a as a fulcrum, pushes down the slide pin 14 together with the pivot pin 20, and releases the brake. At the same time, the belt 10 is tensioned and the rotation of the driving pulley 5 is controlled by the driven pulley 9.
The signal is transmitted to the sprocket 2, and the cage 1 rises along the guide rail. In order to lower the cage 1 from this state, the operating lever 7 may be pushed down in the direction of the arrow B. By operating the lever, the drive device 3 is tilted toward the driven pulley 9, and its drive pulley 5
is in direct contact with the passive pulley 9, and the passive pulley 9
rotates together with the sprocket 2 in the opposite direction to the drive pulley 5, causing the cage 1 to descend.
During this time, the lever 19 suddenly moves to the lever holder 22.
a, the slide pin 14 rises, the friction member 17 comes into contact with the driven pulley 9, and the brake is applied.The lever 19 further rotates clockwise, and the upper edge of the distal end thereof touches the other lever holder 22b. After abutting, the slide pin 14 is further rotated using the lever holder 22b as a fulcrum while pushing down the slide pin 14,
Release the brake. In other words, when switching from ascending operation to descending operation, the brake is applied instantaneously, so
Cage 1 is never in a falling state.

When adjusting the strength of the brake, use case 1.
The screwing depth can be adjusted by turning the bottom cover 13 of No. 2.

When the friction member 17 becomes worn, it can be replaced by rotating the lining base 16, appropriately pulling out the male threaded portion 16a from the slide pin 14, adjusting it, and then removing the screws 18, 18.

As described above, in the present invention, the slide pin 14 is urged upward, the friction member 17 on the upper part thereof is provided in frictional contact with the driven pulley 9, and the slide pin 14 is driven to tilt. The lever 19, which rotates in conjunction with the device 3, is pushed down by rotating around the lever holders 22a and 22b to release the brake, and at the same time the brake is released, the rotation of the drive pulley 5 is controlled by the passive pulley 9.
and sprocket 2, so
When the drive device 3 is in the upright position, the slide pin 14 is automatically pushed up by the spring 15 to apply the brake, and the brake operation is reliable, and the cage 1 is automatically pushed up by the spring 15 when the driving device 3 is in the upright position. The effect is that the vehicle does not fall and is easy to operate.

[Brief explanation of the drawing]

Figure 1 is a front view, Figure 2 is a partially enlarged sectional view,
FIG. 3 is a partially exploded perspective view. 1... Cage, 2... Sprocket, 3... Drive device, 4... Engine, 5... Drive pulley,
6...Spring, 7...Operation lever, 8...Shaft, 9...
... Passive pulley, 10 ... Belt, 12 ... Case, 12a ... Long hole, 14 ... Slide pin, 1
7... Friction member, 19... Lever, 20... Pivotal pin, 21... Pin, 22a, 22b... Lever receiver.

Claims (1)

[Scope of utility model registration request] a sprocket that engages with the guide rail on a cage that can be raised and lowered along the guide rail on the wall;
In a wall lift having a drive device that swings relative to the floor surface of the cage by operating a lever and selectively rotates the sprocket in forward and reverse directions via a belt or a passive pulley, the A cylindrical case is vertically fixed to the cylindrical case, and vertical elongated holes are formed on opposite sides of the case, and a slide pin with a friction member on the upper part is inserted into the case via a push spring. The slide pin is inserted so as to be movable up and down so as to be in pressure contact with the pulley, and the middle portion of a lever passing through the elongated hole of the case is pivotally attached to the lower part of the slide pin.
An elongated hole is formed at the base end of the lever, into which a pin installed on the side of the drive device is movably inserted. A pair of lever holders are fixed to each other, and when the driving device swings, the lever pushes down the slide pin using a point of contact with one of the lever holders as a fulcrum, and releases the brake. A bottom cover for adjusting the spring force is screwed onto the case so that its vertical position can be adjusted, and the friction member is screwed onto the top of the slide pin so that its vertical position can be adjusted. Brake device for wall lifts.