DE1987883U - HANGES - MATERIAL HANDLING DEVICE. - Google Patents

Description

The innovation relates to a suspension material handling device and in particular to an overhead traveling crane which has a single girder bridge and which is movably mounted on the bridge for lifting and lowering loads.

The innovation consists in a new and improved overhead traveling crane or the like. with a bridge, preferably of the single-beam type, and a hoist with a hook or a load gripper, which is suspended by means of a rope on a rope drum arranged on the bridge, the rope drum being arranged so that the rope in each case in the same predetermined The distance from the bridge to the drum is unwound or rolled onto it.

The innovation also consists of a new and improved hoist which has a cable drum, a cable drum bearing and a lifting cable connected to the drum and carrying a load gripper, the cable being released from or rolled onto the cable drum at one point or position, which is kept at a practically constant distance from the drum bearing.

The innovation consists in certain constructions, combinations and arrangements of parts. Further objects and features of the innovation will become apparent to those skilled in the art from the following description of a preferred embodiment with reference to the drawings, which represent part of the description and in which the same parts are each denoted by similar reference numerals. Show it:

Fig. 1 is a partially broken away view of an overhead traveling crane with the features of the innovation,

FIG. 2 shows a partially broken away section along the line 2-2 in FIG. 1, on an enlarged scale,

3 shows a partially broken away sectional view of the cable drum arrangement together with its drive,

FIG. 4 is a side view, partially broken away, taken approximately along line 4-4 in FIG. 2, and FIG

5 shows a section along the line 5-5 in FIG. 3 through a section of the cable drum.

Although the innovation is subject to numerous modifications and can be applied to various fields of application, it is shown and described below in application to an overhead traveling crane of the single-girder type, which comprises a trolley with the hoist with which a

Hook or some other type of load gripper is connected, which in turn is connected to a lifting rope that is connected to the rope drum and can be wound up and unwound on this for lifting and lowering the hook or gripper. Of course, however, the innovation is not intended to be restricted to the specific embodiment shown and described, but rather to include all changes and optional constructions within the extended scope of protection.

The crane shown in the drawings has a single girder bridge A which is supported at its ends by two running sets B and C which are able to run along a bridge guideway. This guideway is through along both sides of a building D or the like. Structure, the floor space of which forms a work space to be operated by the overhead crane, arranged rails 10 and 11 are formed. According to FIG. 1, the bridge A spans the width of the building D and is driven on the rails 10 and 11 in the longitudinal direction of the building by electric motors E (FIG. 2) with reversible direction of rotation, which in turn are supported by the bridge running sets B and C. and are drivingly connected to one or more of the bridge running wheels 12 via a transmission 13.

The bridge A carries a trolley F, which is arranged on the top of the bridge, and a trolley guide on the bridge A forming rails 14 and 15 is movable along the bridge A. The trolley F carries a hoist G for lifting and lowering a load hook 16 attached to a lifting rope 17. The trolley F has wheels 20 and 21 attached in pairs to the ends of axles 22 and 23, respectively. The axles 22, 23 are mounted in the trolley frame 26 near the two ends of the trolley frame. The trolley is moved along the bridge A by a drive device J with an electric motor 24 with a reversible direction of rotation, the output shaft 27 of which is connected to the axis 22 via a coupling 28 and a transmission consisting of gears 30, 32, 34 and 36. By selectively actuating the motors E and 24, the trolley can be leveled over any point on the floor of the building D so that the hook 16 can be connected to loads to be transported between selected areas of the floor space.

The hoist G has a substantially cylindrical cable drum 40 which is attached to the trolley F by means of a drum housing or bearing 42 which is fastened to the trolley frame 26 or which forms part of the same. The cable drum is mounted so that its axis of rotation is essentially horizontal and practically at a right angle to the length of the bridge A; it is by a drive device H in rotation and in axial reciprocating movement in the housing 42 offset. In the preferred embodiment of the innovation, the drum circumference is provided with two uninterrupted, spiral cable-receiving grooves 46 and 48 formed therein by machining or otherwise. The turns of the spiral double grooves 46 and 48 are separated from one another by an uninterrupted spiral partition 50. In cross section, the grooves have the shape of rounded W's which are separated from one another by the partition walls 50. In the preferred embodiment of the innovation, two lifting rope sections 17A and 17B are unwound or rolled up onto the drum 40 at the same time, each of which is received by a groove 46 and 48 and is unwound from it. This groove arrangement enables the lifting rope to be unwound and rolled up while each winding of the rope is kept separate from the other windings; This ensures that the lifting rope is properly wound and unwound on the drum and virtually any rope tangling on the drum is eliminated.

The drum 40 is driven by the drive device H with an electric motor 52 with reversible direction of rotation, which is connected via a reduction gear 56 attached to one end of the shaft 54 and a second shaft 60 which is connected to the motor shaft 58 of the motor 52 via a coupling 62 is attached gear 58 in drive connection with a drum drive shaft 54 stands. The shafts 60 and 61 are provided with braking devices 63 and 64, respectively. The other end of the drum shaft 54 extends into a hollow region 65 of the drum and has a coupling device 66 firmly keyed to it which rotates with the shaft and gives the drum a rotational movement. This coupling device consists of a sleeve 67 wedged firmly to the drum shaft 54, which secures the coupling device against linear movement on the shaft 54, and two radial arms 68 attached to the sleeve 67, protruding radially therefrom, the opposite ends 70 of which can slide into elongated keyways 72 engage, which are formed 180 ° apart from each other in the interior of the drum. As a result of this drive connection, the drum, when it is set in rotation by the shaft 54, can move back and forth linearly with respect to its axis of rotation.

The outer or right end of the drum according to FIG. 2 is mounted on rollers 74 which produce a longitudinal movement of the drum along its axis, of which there are four in the illustrated case. These rollers are mounted between two spaced apart flanges 76, 78 which extend from the inside of the drum housing 42 inwardly towards the drum, the rollers being able to engage in free sections of the cable grooves 46 and / or 48, so that the drum as a result of the spiral groove arrangement relative to the shaft 54 and the clutch 66 is caused to reciprocate in a straight line. The axes of the rollers 74 are arranged according to the pitch of the spiral grooves, so that the rollers properly engage in the grooves without generating unnecessary friction.

The other or left end of the drum is linearly movable and rotatable by means of a carriage 80 with rollers 82, in that these rollers 82 run in a straight line in guides 84 attached to the drum frame 42 and running parallel to the axis of rotation of the drum. A sleeve 86 attached to the left drum cover plate 88 and rotating with the drum is rotatably mounted in the carriage 80 and surrounds the shaft 54. The sleeve 86 has an inner diameter greater than the diameter of the shaft, with a gap 89 between the two parts remains so that the drum can move unhindered in the longitudinal direction of the shaft. Bearings 90 are inserted between the slide 80 and the sleeve 86, which bearings allow the sleeve to rotate relative to the slide 80, but prevent relative axial movement between these parts. As a result of this arrangement, the carriage is able to move along the guides 84 as the drum moves along its axis of rotation. Unless it is the

To allow loading requirements of the drum, the carriage 80, the rollers 82 and the guides 84 can optionally be omitted and the inner or left-hand end of the drum can be supported directly on the drum shaft 54.

When the motor 52 drives the shaft 54, the drum is set in rotation and, depending on the direction of rotation, winds the sections 17A and 17B of the hoisting rope 17 into and out of the grooves 46 and 48 and moves along the shaft 54 during this rotary movement on one side of the trolley F and the bridge A outwards and inwards, respectively, whereby the position of winding or unwinding of the lifting rope is kept at a predetermined distance from the side 92 of the bridge beam, so that the overhang of the load relative to the beam remains constant and the beam is not an obstacle to the lifting rope, hook or load hanging from the hook during the lifting process. The linear movement of the drum as it rotates also ensures proper winding and unwinding of the rope 17 in and out of the grooves 46 and 48, so that the rope is arranged in a number of spaced turns on the drum circumference, whereby tangling or tangling of the lifting rope is avoided.

Although in the preferred embodiment of the innovation the drum is reciprocated by rollers 74 Obviously, other devices, such as ball bearings, sliding blocks fixed to the device, a nut or the like, can also be used in order to fulfill this function, if desired. The pulleys 74 are also shown mounted on the outer side of the hoisting ropes, this arrangement allowing movement of the drum to its outermost inward position when the hook 16 is raised to its uppermost position, which is generally the desired drum position when not in use represents a standing crane; nevertheless, the rollers could also be arranged on the inner side of the lifting rope without deviating from the basic idea of the innovation.

The trolley E is provided with two anti-tipping wheels 94 which protrude from the underside of the trolley frame 26 on its side opposite the lifting side and are able to run along a guide 96 which is attached along the upper portion of the side 97 of the bridge beam A. These wheels prevent the trolley from tilting under the load created by the lifting action on the opposite side of the trolley. From the other side of the trolley frame 26, i.e. from the lifting side, an L-shaped sliding shoe 98 protrudes downwards, the horizontal section of which on a retaining strip 99 extending along the upper end of the beam side 92 aligned, but normally at a distance therefrom, so that tilting of the trolley about the guide 15 by contact of the sliding shoe 98 with the retaining strip 99 is prevented.

The lifting rope 17 shown is a double-reeved rope, the free ends of which are connected to one and the same end of the drum, so that the resulting double rope strands or sections 17A, 17B are rolled up and down on the drum at the same time. In FIGS. 3 and 5, the rope is omitted for the sake of clarity and is shown in phantom in FIGS. 2 and 4. The cable guide of FIG. 2 can be followed from the drum 40, from where the cable extends through an opening in the bottom wall of the drum housing 42 in a downward direction under and around a sheave 100, which is one of six sheaves carried by a hook block 102 represents. From the pulley 100 the rope continues upwards over and around a pulley 104, which is one of a group of four pulleys carried by the drum housing 42, then in the downward direction under and around a pulley 106, in the upward direction over and around a pulley 108 again in the downward direction under and around a pulley 110, then in the upward direction over and around a pulley 112, the axis of rotation of the drum frame running perpendicular to the axis of the other pulleys housing 42, then in the downward direction under and around a pulley 114, again in the upward direction over and around a pulley 116, then again in the downward direction under and around a pulley 118, in the upward direction over and around a pulley 120, in the downward direction over and around a pulley 122 and finally again in the upward direction to the drum 40, to which the other end of the rope is anchored, so that the hanging rope sections 17A, 17B come to lie next to one another in the drum grooves 46 and 48. This rope guide arrangement ensures a plumb bob arrangement in which the rope holds the hook or the load gripper during the vertical movement through the drum 40 in order to achieve stability of the hook in a vertical plane running along the bridge. If the lifting requirements of the crane permit, a simple rope guide can also be used, in which one end of the rope is connected to the drum.

An operator in a cabin K hanging on the underside of the bridge A can, by appropriate control of the motors E, 24 and 52, align the trolley F over any selected point on the building floor and lower the hook 16 or another load connected to the lifting rope 17 -Handling device effect to connect the hook or this device with a load bring to. To lower the hook, the drum 40 is rotated and moved out of the housing 42 as the successive rope windings are unwound, the distance between the depending rope sections 17A and 17B and the side 92 of the bridge beam being kept practically constant. When the hook is in its lowest position, the drum has moved the furthest out of the trolley F. When the hook is lifted, the drum is set in rotation in such a direction that it moves into the housing or into the frame 42 on the trolley. While the rope is being rolled into the spiral grooves 46 and 48, the distance between the rope and the side 92 of the bridge beam is kept practically constant during the lifting process.

From the above description of the preferred embodiment of the innovation it can be seen that the innovation is able to solve the aforementioned and other objects and creates a new and improved lifting device or hoist that has a predetermined distance between the hanging lifting rope 17 and one side of the bridge beam and also ensures proper winding and unwinding of the rope on the lifting drum, so that tangling or tangling of the lifting rope is prevented during operation. Although the preferred one

Embodiment of the innovation is shown and described above in precise details, it should be noted that the innovation, as mentioned, is in no way restricted to the specific construction and arrangement shown, but rather all changes and modifications that are within the possibilities of the person skilled in the art and the scope of the innovation and should include use cases. For example, the hoist could be used in arrangements other than an overhead crane, such as in connection with jibs and hoists that use winches or hoisting drums to lift and lower loads.