DE1883998U - SAFETY DEVICE ON BOOM LIFT. - Google Patents

Description

Orenstein-Koppel and Lübecker Maschinenbau Aktiengesellschaft, Berlin SW 61, Tempelbofer Ufer 23/24

£ at 808 safety device on cantilever lifts.

The invention relates to a safety device Cantilever lifts or movable on the outer walls of high-rise buildings, Electrically controlled work platforms for the transportation of people are provided.

With such load, lifting and lowering devices result often difficulties due to the fact that the work platform or the the ropes carrying the gondola as a result of an unintended Aufsetzews become limp;

If the ropes become slack in the upper lifting area of the boom, the rope strands running from the lifting drum to the boom pulley also become slack and can run off the cable drums. The ropes are either loosely on the hoist drum, so that they come off sich.in wrap several layers on each other or from the hoist drum. The consequences of this are operational malfunctions, rope destruction and accidents, "which are thus triggered.

There are devices of any type known that, as soon as a Slack rope has formed, address * This is how you have such Equipment directly attached to the hoist drum You have the job of the hoist, provided it is electric operated hoists act to switch off. The real Schlaffτ However, rope formation on the rope drum is not a safe * being prevented "

The object of the invention, the the aforementioned disadvantages should avoid, lies in the fact that you will definitely go to sleep of the rope on the piece between the boom roller in the boom head and the hoist drum · is prevented, while the known devices do not · 'prevent the formation of a slack rope', but only switch off the hoist at the moment when a Slack rope has arisen '* ■■ ^. 2 ^ -

The one associated with the presence of a slack rope. The source of danger remains when restarting »

The solution of the invention proposes that at the same time as the tension of the ropes holding the working platform decreases, a braking device connecting the rope trailing between the cantilever roller and the lifting drum is provided _. A cantilever roller supported on springs, accommodated in the boom head, held by a rocker movable about an axis in the vertical plane, and a brake piece adapted to the cable-receiving recess of the boom roller being fastened in the boom head, serve as braking device.

According to another feature, one operates on the movements the rocker arm, curved control rod, a control circuit breaker built into the boom head *

Are two working platforms supported by a common boom the way that they are arranged one above the other, the upper work platform only from the lower work platform electrically controlled for moving up or down when the lower platform is not moving Several independently working cantilever rollers and rockers can be installed in one boom head /

Such working platforms arranged one above the other are required ζ, B * if the neon » tubes in lengths of several meters have to be replaced

With the goal catch according to the invention is in the simplest way ensures that the formation of slack rope between the cantilever pulley and the lifting drum is prevented. Furthermore, it is achieved that a very little slack rope formation between the cantilever pulley and the working platform or the gondola immediately and automatically leads to shutdown of the hoist. ;

Based on the representations that an embodiment of the subject reproduce the invention schematically, the mode of operation is described ". ■. ■ -." Show in detail

Fig. 1 a boom head in the longitudinal section with a

Safety device, '-

Fig. 2 shows the arrangement in the boom head in section according to

H-II of Fig. 1, · ·. : ■ '"..

Fig. 3 the boom head "in section according to HI-III of Fig, T, Fig »4 the safety device housed in the boom head when switched on,

Fig * 5 the activated safety device with the Boom head in section according to line V-V in Fig. 4 and. · ·

Fig. 6 the design of a cantilever pulley with two rope pulleys in connection with the activated safety device in section analogous to Fig. 5,

In a boom head 1, as a partial section - as far as he is of importance for the subject matter of the invention - reproduced is, a rocker arm 2, which is rotatably mounted about an axis 3, is housed * This rocker arm 2 leads between them A cantilever roller 4 on an axis 5. On the axis 3 on the opposite side, the rocker arm 2 rests on springs. 8a, those in spring pots - 7.7a, which are also in the boom head 1 are attached, rest * ._

Above the cantilever roller 4 - connected to the boom head 1 - a brake piece 6 is provided, which is designed in its shape so that it fits into a recess 41 of the cantilever roller 4 in which a rope 11 is guided. At the same time, the brake piece 6 serves as a safety bracket for the rope 11, which is guided in the cantilever pulley. '.- _- _: _

With the part of the rocker 2 that oscillates about the axis 3 a shift rod 10 coupled, which is held in a curve (Fig. 1 and · 4) and which constantly touches a control circuit breaker installed in the boom head 1. -

■ - 4— ":. Ν

The safety device that prevents the formation of a slack rope on the route between the cantilever roller 4 and the non-dar »- Is to prevent provided hoist and the not shown'Hubtrommel, is in the representation shown in Fig. 1 not switched on. The working · * stage attached. Due to the dead weight of the rope 11 and the full weight of the working platform, the rope 11 is tightened Cantilever roller 4 is based on the rocker 2, which is on the Springs 8,8a rests and has compressed them. The control circuit for the hoist is because the control circuit breaker 9 leads to the upper end of the curved shift rod 10, not interrupted.

Now occurs when moving the working platform downwards: "· The obstacle occurs and the working platform sits up, see that the tension of the rope 11 is reduced and the rope 11 assumes the shape between the cantilever roller 4 and the working platform as it is in FIG Fig. 4 is drawn, the cantilever roller 4 is raised by the rocker 2 as a result of the action of the leather 8,8a, and the brake piece 6 brakes the movement of the cable 11 running over the cantilever roller 4 to the lifting drum. ■ -Anheben the rocker 2 is guided to the control circuit breaker 9 along the curved shift rod 10 so that the control circuit is opened, and thus the lifting mechanism is switched off, _-...;

The hoist is switched in the "upwards" direction and that Pulled rope 11 under the brake piece 6, so that the slack The piece of rope between the cantilever roller 4 and the working platform is tensioned again. ■

As a result of the automatic engagement of the brake piece 6, it is prevented that a slack rope could form between the cantilever roller 2 and the lifting drum. _; . -

The braking force, triggered by the springs 8 _f 8a, is set so that it can only brake the maximum dead weight of the ropes with a small safety margin. The rope 11 can therefore be pulled through the braked cantilever pulley 4 without risk and without any damage to the rope, since this usually only involves rope paths of 4 to 5 cm until the slack rope formation is lifted and through the load or work platform or platform that is firmly attached again The swing arm is released again in the gondola. Even with rope distances of 0.3 to 0.4 m, which can result from worn hoist brakes, no damage to the rope is to be expected.

Claims (4)

P.Ä. 283 21.6 * 27. i63 Orenstein-Koppel and Lübeck mechanical engineering. Aktiengesellschaft, Berlin SW 61, Tempelhofer Ufer 23/24 Pat 808 Eye protection claims 1. Safety device on cantilever lifts or on the outer walls of high-rise buildings, electrically controlled, work platforms intended for the transport of people, d a d u r c h e k e η η ζ eic h η et, that ß at the same time with decreasing tension of the working platform holding ropes a braking device preventing the rope from running between the boom pulley (4) and the lifting drum is provided. 2. Safety device according to claim 1, dadu rc h .g e .. ". ** · ■ k en η ζ e ic h η et» that one on springs (8,8a}, supporting, housed in the boom head (1) Cantilever roller (4) is held by a rocker (2) movable about an axis (3) in a vertical plane and a brake lining (6) adapted to the cable (11) receiving recess (41) of the cantilever roller (4) is attached in the boom head, as Serve braking device » 3. Safety device according to claim 1 and 2, d a d u r ch g e k e η η ζ ei c h η e t, d a ß a, in-the movements of the rocker (2) participating, held in a curved shape switching rod (10) built into the boom head (1) Control circuit breaker (9) activated ». 4. Safety device according to claim 1 to 3 »characterized in that B several independently working cantilever rollers and rockers can be installed in a Ausl.egei> head.