DE2307355A1 - LIFT DEVICE FOR THE DRIVER'S STAND OF A TRADE-WORKED CRANE - Google Patents

Description

PATENT ADVOCATE PIPL-IN Q. JOACHIM STRASSE 2307355 MC HANAU · HUMEITSTIL W · POST BOX Tti · TELtM (S · TE LEQKAMME: HANAUPATENT · TELEX: 4 «47Mp« t

POTAIN S.A. February 14, 1973

Chevilly Larue, France Se / si - To 898

Lifting device for the driver's cab of a crane in truss design

The invention relates to a lift device for the driver's cab of a crane in truss design.

It is known that a crane operator of a crane of about 50 m height per working day at least four times on the 300 rungs must go down and up a narrow ladder, whereby he has to open and close a number of safety devices. As a result, valuable working time is lost and the The crane operator tires quickly, which reduces his ability to concentrate and perform well.

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It is the object of the present invention to address these disadvantages to avoid and to create a lifting device for the driver's cab of a crane, which enables the crane operator to to get into the cab on the ground or just above it, then to press a button and securely to his ar-. to drive up to the workplace and, if necessary, to drive down again. ■

This object is achieved in that the Device a swiveling cabin that is independent of the crane, a movement device and a holding device for the cabin, an electric control winch for this movement and Holding device with which the cabin can be raised or lowered along the outer surfaces of the crane mast and has swing-out or extendable devices, to lock the cabin to the mast.

The movement device for the cabin expediently consists of two hoisting ropes, which are over on each side of the Rollers attached to the canopy run, with a safety rope attached in the middle of the canopy.

The holding device for the cabin is advantageous Way of a deformable parallelogram system with a ' Bridge made of two supports hinged on both sides of the cabin mast, between which guide rollers for the hoist ropes and the safety rope are attached; a shark rope that is attached on the one hand to the cabin mast and on the other hand to the bridge · which can be lowered until the tether is excited to swing the cabin away from the mast and initiate its unimpeded descent; and one automatic locking device for the car roof with the bridge, as soon as that on its ascent the height of the

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Has reached the cabin mast, the unit of cabin and The bridge describes an arch as it ascends until the two pillars of the bridge take their place on either side of the Cabin mast on the truss of the crane mast, where they are locked automatically or by hand and surround the cabin in the working position.

The control winch for the movement and holding device of the cabin preferably consists of one with a transmission gear coupled electric motor, which are attached to a base with an intermediate bearing and an external bearing, wherein a shaft of the transmission rotates in the intermediate bearing and thereby drives and drives a winding drum for hoisting ropes its end on the side of the bearing carries a free-running wheel, which when the shaft of the gearbox rotates in the sense an upward movement of the car actuates a notched hub, which drives a sliding friction disc, which in turn drives a Return drum for the safety rope via an intermediate Operates friction system that is attached to the outer bearing.

In a further embodiment of the invention, the diameter of the drum for retrieving the safety rope is somewhat larger than half the diameter of the drum for winding the lifting ropes, which run with two strands over rollers on the roof of the cabin at such a speed that the dio the retrieval drum through the safety rope, transmitted speed below the speed of the wave of the Drum for winding the hoist ropes is located, the friction system compensates for this speed difference and keeps the safety rope taut and through the retrieval drum for the safety rope the retrieval of the electrical remote control cable of the device takes place when this cable is not in the Safety rope is included as a soul.

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-The outer bearing, which supports the shaft of the retrieval drum, preferably consists of a ball bearing provided with a bell, inside of which there is a hub carried by the shaft of the drum, which has two flyweights which are held in position by springs and whose profile is designed in such a way that they spread under the action of centrifugal force and wedge in the bell and thereby fix the hub and consequently the return drum for the safety rope and which, in the event of a malfunction in the mechanism of the device or a break in the working ropes, x \ rby the descent speed of the car, the speed of rotation of the drum and thus the hub are suddenly accelerated, immediately wedged in the bell of the outer bearing by the high centrifugal force and fix the drum, whereby the fall of the car is slowed down by the safety rope.

The safety rope is in particular on a bracket and guided on a tension spring attached roller to a sudden stop of the car by the safety rope at a Use the bracket and the tension spring to dampen the malfunction.

Furthermore, the devices for locking the cabin with the mast as a bridge of the cabin to create a transition in front of the cabin to the lattice mast on two fixed slide rails Slidable under the cabin floor, a lever located inside the cabin being provided for the displacement is.

In a further embodiment, the entry and exit webs are The cabin is hinged to the rear beam of the cabin via two cardan hinges and is fitted with a detachable loop held, the solution of which fold the bar on the lattice mast

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lets to make a transition between the cabin and the lattice mast to manufacture.

The cabin is advantageously equipped with a multiple plug for branching off the general control lines for the crane provided as soon as the cabin is in its working position on the cabin mast is locked.

With the lifting device according to the invention, the advantages. ι ο achieved that the car works as a lift regardless of the position of the crane boom, with only one electrical control is required for both upward and downward travel. namely that of the winds. The crane will do it completely separated from the cabin during changes in position controlled, which offers additional security. The Ilaltebrücke ensures the distance between the cabin and the lattice mast of the crane and thus prevents any possible hitting of obstacles.

The height of the upward travel is arbitrary within the construction height of the crane.

The lifting system for the cabin with the two sets of rollers that are attached to the side of the cabin width as well as the safety rope, secure the change of position of the cabin without much Fluctuations even in strong winds.

In its working position, the cabin is secured by its attachment on the bridge and fixed by its attachment to the framework of the cabin mast.

The safety when driving up and down is automatically ensured by the friction systems attached to the steering winch guaranteed.

Leaving the cabin in the event of a malfunction is made easier by the bridge provided on the cabin. Furthermore, the risk of fatigue for the crane operator is

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avoided walking and time gained by the fact that the crane driver no longer visits his cab several times a day needs to climb up and down from there. In addition, there is another advantage that the risk of falling during these climbing processes, as required in known cranes are turned off.

Further details of the invention are illustrated by means of a drawing illustrated Ausftihrungsbeispiels explained in more detail.

Show it:

Fig. 1 is a schematic side view of the cabin in the working position on the cabin mast of a Timber-framed crane,

FIG. 2 is a view corresponding to FIG. 1, in which the cabin is in a position from which it can be lowered over the bridge,

Fig. 3 is a schematic view of the deformable Parallelogram system of the bridge,

K shows a schematic side view of the driver's cab, which is attached to the crane mast at any height of the mast via its bridge web,

Fig. 5 is a schematic front view of the control cabin and their lifting and moving system,

Fig. 6 is a view of the electrical control cable of the device, which is in the safety rope for the cabin is included,

7 is a simplified perspective view

of the lifting and safety system for the cabin, in which only one

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single set of pulleys and a single hoist rope are shown on the cabin roof,

Fig. 8 is a sectional view through the control winch mechanism for raising and lowering the Cabin and

Fig. 9 is a detailed sectional view of the on (ler Winch from Fig. 8 provided safety device.

In the drawings, a crane is partially shown with a lattice mast 1 and a cabin mast 2. A retaining bridge 3 consisting of two supports k articulated on both sides of the cabin mast is attached to this cabin mast, between which the guide rollers for the hoisting ropes and a roller 5 for the safety rope 6 are attached. This bridge represents a deformable parallelogram system, to which a tether 7 is attached at one end, the other end of which is attached to the cabin mast 2 so that the bridge 3 can be unclipped until the tether 7 is tensioned. The bridge 3 also has a known automatic fastening device 8 for connection to the roof of a cabin 1o and a further fastening device 9, which can be operated either automatically or by hand, for dio Hofes maintenance of the bridge 3 on the framework of the cabin mast, if the cabin has reached the point from which the crane is controlled.

The cabin 1o known type is on its roof with two Sets of rollers 11 are provided, which are attached laterally to the edge of the cabin width (in Fig. 7 for the sake of clarity only one set of these rollers is shown), over which two hoisting ropes 12 run, which are loaded on the truss of the crane

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Inventive anchor points 1 '3 go out and before they go around the guide rollers of the bridge 3 and are wound up on a lifting drum 18 around the rollers 11. The safety rope 6 is attached in the middle of the car roof and runs over the guide pulley 5 of the bridge and over another pulley 13 - the structure and operation of which will be described in more detail later - before it is wound onto a retrieval drum 19. The car 1o is connected to the control device by an electric remote control cable Ak which has a control button 15 for moving up and down. The button 15 is located inside the cabin. The electrical cable Λk is either an independent separate cable or is contained in the interior of the safety rope 6 as its core (Fig. 6).

An electrically operated winch causes the up and down movements of the Lifting ropes 12 and the safety rope 6.

This winch has an electric motor 16 of a known type with a specific power, which is connected to a transmission gear 17. The motor 16 and the transmission gear 17 are fastened on a base with an intermediate bearing 2o and an outer bearing 21 (FIG. 8). A shaft 22 of the gearbox runs on balls in the bearing 2o and drives the hoisting drum 18 via a wedge and thus the winding of the hoisting rope 12. At the end of the shaft 22 on the side of the bearing 2o, a free-running wheel 23 is attached. When the shaft 22 rotates in the upward direction of the hoist rope 12, this free-running wheel 23 takes a notched hub 2k with it. This notched hub 2k drives a friction disk 25 which is provided on each side with a lining 26, for example a friction lining. This disk 25 drives the drum 19 to retrieve the safety rope 6 via the outer bearing 21.

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The diameter of the drum 19 for the retrieval of the safety rope 6 is, taking into account the fact that the hoisting ropes 12 run with two strands over rollers, chosen to be a little over half larger than the diameter the lifting drum 18, so that the speed transmitted to the drum 19 by the rope 6 is below the speed the shaft of the lifting drum 18 is located. The sliding friction between the friction disk 25 and the lining 26 is compensated this difference in speed and ensures that the safety rope 6 is tightened.

A compression spring 27 which can be adjusted via a screw 28 is fixed between the bearing 2o and a fixed friction plate ^ o. The spring 27 is with your during rotation Bearing r> firmly connected and freely movable during movement. The plate Uo is on the pads 26 on the Friction disk 25 and enables the adjustment of the clamping

strength. The drum 19 can also be a sufficient one Have space 28 for winding the electrical cable 1 * 1, if this is not included in the safety rope 6.

The part of the drum 19 is attached to that of the friction disk 25 opposite side supported by the outer bearing 21 provided with ball bearings, which has a bell 29 ″. the The shaft of the drum 19 carries a one located inside the bell 29 Hub 3o.

The shaft 3o has two plied weights 31, which by Springs 32 are held in place and the like Have profile that they are under the action of centrifugal force spread and wedge tight in the bell 29 as indicated in Fig. 9 with dashed lines and during of rotation, the hub 3o and consequently the return drum for the safety rope 6.

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The roller 13 (Fig. 7), the rope 6 running over plural marriage of retrieving is mounted on a bracket 33, which is connected via a tension spring '\ h with a fixed point on the truss of the crane and is used at an operating fault to dampen a sudden stop of the car by the safety rope 6.

The cabin 1o is provided with a web 35 (FIG. 4) which consists of assembled, folded metal profiles and is provided with hooks (not shown) at its ends, with the help of which the cabin 1o can be fixed on the framework of the lattice mast of the crane.

The web 35 is on two fixed sliding clips, not shown Slidable under the floor of the cabin, the shifting being effected by a lever located inside the cabin or a crank is accomplished. It is also possible not to have the web 35 on the rear beam of the cabin 1o with two hinges shown, for example cardan hinges to articulate and fasten with a loop, which is only released needs to be so that the web 35 can be folded onto the lattice mast.

The cabin "Io is provided with a multiple plug j6 (FIG. 4) via which the control lines for the crane can be branched off when the cabin is in its working position on the cabin mast.

The mode of action is as follows:

To travel upwards, the crane operator gets into the cabin Io, which is located at a height of about 3 m above the ground, which enables the crane to be set up regardless of the weather without the cabin in case of an eventual

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Rotation by cU; ti litterraast hits obstacles. The crane operator operates the button 15 in the "up" direction, whereby the electric motor 16 is energized in the "up" direction. The hoisting ropes 19 wind up on the ilub drum 18 and lift the cabin 1o. At the height of the cabin mast 2, the cabin 1o meets the bridge 3, which is unfolded and held by its Ilalteseil 7, which is tense. The roof of the cabin 1o is automatically locked with the bridge 3 via the fastening device 8. The unit of car and bridge is raised further, describing an arc of a circle in order to reach the workplace where the car is enclosed by the side supports k of the bridge 3, which in turn are locked to the framework of the car mast 2 via the fastening device 9. The connection of the crane's control lines is then established via the multiple plug 36 of the cabin Io so that the crane is ready for operation. Of course, a cabin 1o can also be used that has no window flaps or no open front.

To set the cabin down on the Erc e, the control lines for the crane are first disconnected when traveling downwards. As soon as the electric motor initiates the downward movement, the crane operator releases the bridge 3 from the cabin mast 2 from inside the cabin. The car 10, detached from the bridge 3, continues its downward movement. The free-running wheel 23 no longer entrains the friction disk 25, which is defined by the friction grease 2.6 - ko . The safety rope 6 exerts a train on the retrieval drum 19, which rotates in the unwinding direction. The friction causes the safety rope 6 to remain taut during unwinding.

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In the event of a malfunction of the mechanism or a breakage or rupture of the working ropes, the cabin 1o will accelerate its descent strongly and drive the return drum 19 of the safety rope 6. The speed of this drum 19 will increase and the flyweights 31 in the hub 3o will spread under the action of centrifugal force and wedge themselves in the bell 29, so that the drum 19 is stopped immediately. This abrupt stop of the car 1o is dampened by the spring "} h. Of the roller 13.

If such an incident occurs at a great height, the crane operator can leave his cabin and use the bridge 35 climb onto the lattice mast.

Expectations :

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Claims (1)

Expectations : 1. Lifting device for the driver's cab of a crane in specialist , Factory execution, characterized that the device has an independent and swiveling cabin (io), a movement device and a holding device for the cabin (io), an electrical one Control winch for this movement and holding device, aiit the cabin (io) along the outer surfaces of the crane mast (i) can be raised or lowered and has swiveling or extendable devices (35), to lock the cabin (io) to the mast (i). 2. Device according to (3 claim 1, characterized in that the movement device for the Cabin (io) consists of two hoisting ropes (12) that are connected to rollers (ii) attached to each side of the car roof run, a safety rope (6) is attached in the middle of the car roof. 3. Device according to claim 1, characterized in that the holding device for the cabin (io) consists of a deformable parallelogram system with a bridge (3) of two supports (h) hinged on both sides of the cabin mast (2), between which guide rollers ( io, 11) for the hoisting ropes (12) and the safety rope (6) are attached; a tether (7) t which is attached on the one hand to the cabin mast (2) and on the other hand to the bridge (3), which can be lowered until the Ilalteseil (7) is tensioned to pivot the cabin (lo) away from the mast (1) and initiate their unimpeded descent; and an automatic locking device (8) for the car roof with the bridge (3) »as soon as that 309835/0472 has reached the cave of the cabin mast (2) during its ascent, the unit of cabin (lo) and Brüti.e (3) describing an arc on its upward journey until the two supports (U) of the bridge (3) are in their place with both Have taken sides of the cabin mast (2) on the framework of the crane mast (1), where they are locked automatically or by hand and surround the cabin (lo) in the working position. H. Device according to one or more of claims 1 to 3, characterized in that the control winch for the movement and holding device of the cabin (lo) consists of an electric motor (16) coupled to a transmission gear (17) which is mounted on a base with a Intermediate bearing (2o) and an outer bearing (21) are attached, a shaft (22) of the gear (17) rotating in the intermediate bearing (21) and thereby driving a winding drum (18) for hoisting ropes (12) and at its end on the Side of the bearing (21) carries a free-running wheel (23), which when the shaft (22) of the gear (17) rotates in the sense of an upward movement of the car (10) actuates a notched hub (24) which is a sliding Friction disk (25) drives, which in turn drives a return drum (19) for the safety rope (6) via an interposed Friction system operates, which is attached to the outer bearing (2o). 5. Apparatus according to claim 4, characterized in that the diameter of the drum (19) to retrieve the safety rope (6) is slightly larger than half the diameter of the drum (18) for winding up the hoisting ropes (12), which with two strands over pulleys (11) on the roof of the cabin (lo) with such a Run speed that the return drum (19) - 15 - 309835/0472 speed transmitted by the safety rope (6) below the speed of the shaft (22) of the drum (18) to unwind the hoisting ropes (12), whereby the Friction system compensates for this speed difference and keeps the safety rope (6) taut and through the retrieval drum (19) for the safety rope (υ) retrieving the electrical remote control cable (14) the device takes place when this cable (i4) is not in the Safety rope (6) is included as a soul. 6. Device according to claims h and 5, characterized in that the outer laper (21) which supports the './eile (22) of the return drum (19) consists of a ball bearing which is provided with a bell (29), in the interior of which a hub (3o) carried by the shaft (22) of the drum (19) is arranged, which has two flyweights (31) which are held in position by springs (32) and whose profile is designed such that they spread under the action of centrifugal force and wedged in the bell (29) and thereby the hub (3o) and consequently the return drum (19) for the safety rope (6) set and which in the event of a malfunction in the mechanism of the device or a rupture of the Working ropes, increasing the rate of descent of the car (iu), the speed of rotation of the drum (19) and thereby the hub (3o) accelerated suddenly immediately wedged in the bell (29) of the outer bearing (21) and the drum (19) determine what causes the fall of the cabin (io) by the safety rope (ό) is braked. 7. Apparatus according to claim 6, characterized that the safety rope (6) is attached to a bracket (33) and to a tension spring (34) - 16 - 309835/0472 Roller (13) is guided to an abrupt stop of the Cabin (io) through the safety rope (6) in the event of a malfunction with the help of the bracket (33) and the tension spring. 8. The device according to one or more of claims 1 to 7, characterized in that the Devices (35) for locking the cabin (1 ο) with the Mast (1) as a bridge of the cabin (io) for the production of a. Transition in front of the cabin (io) to the lattice mast (i) two fixed slide rails are slidable under the cabin floor, with one inside the cabin for the shift (io) located lever is provided. 9 · Device according to one or more of claims 1 to 7, characterized in that the entrance and exit web (35) of the cabin (io) has two Cardan hinges are hinged to the rear beam of the cabin (io) and held with a detachable loop, the Solution fold the bar (35) onto the lattice mast (i), t, to create a transition between the cabin (io) and the lattice mast (1). 1o. Device according to one or more of claims 1 to 9, characterized in that the cabin (io) has a multiple plug (36) for branching off the general control lines for the crane are provided, as soon as the cabin (io) is locked in its working position on the cabin mast (2). 309835/0472 Blank page