JPS597360Y2 - hoisting device - Google Patents

Description

[Detailed description of the invention] This invention is capable of hoisting or lowering a load suspended on the hook of a hook block having a pair of sheaves using four wire ropes wound around each sheave and wound around the winding drum. The present invention relates to improvements in hoisting devices, such as electric hoists, for carrying out cargo handling operations.

A conventional performance device of this type will be briefly explained with reference to FIG.

In the figure, 1 is the main body of the sojo machine, a support frame, an electric motor for rolling soil with an electromagnetic brake connected to one end of the support frame,
a reduction gear (not shown) coupled to the other end of the support frame and connected to the electric motor; and a winding drum 2 coupled to the reduction gear and substantially surrounded by the support frame.
It is structured by.

3 is an equalizer sheave rotatably supported by an equalizer sheave hanger (not shown) that is swingably connected to the support frame; 4 is a hook block having a pair of sheaves 4a and 4b; suspends the load.

Reference numeral 5 denotes a continuous wire rope, one end of which is fixed to one end of the winding drum 2 and wound around the center of the winding drum 2, and connected to the one sheave 4a→the equalizer sheave. 3→the other sheave 4b→the central part of the winding drum 2→the other end of the winding drum 2, and the other end is fixed to the other end of the winding drum 2.

Since this kind of conventional hoisting device is constructed as described above, when carrying out cargo handling work by suspending a load on the hook block 4 and rotating the hoisting drum 2 in the hoisting or hoisting direction, the load is suspended on the hook block 4. There is a drawback that the hook block 4 and the four wire ropes 5 suspending the hook block 4 become tangled due to load swinging, etc., making cargo handling operations impossible.

In addition, there is a drawback that the wire rope 5 loses its twist and quickly becomes unusable.

Furthermore, when the wire rope 5 is damaged and needs to be replaced, since the wire rope 5 is a series of long objects and is wound around the equalizer sheave 3, the equalizer sheave 3 must be removed and the hook block 4 must be removed. The equalizer sheave 3 and hook block 4 must be disassembled to disassemble and disengage from the equalizer sheave 3, hook sheaves 4a, 4b, and wire rope 5, as well as to remove the wire rope 5 wound around the winding drum 2. This has the disadvantage that it requires removal from the winding drum 2 and reassembly, which requires a considerable amount of time for replacement.

This invention eliminates the drawbacks of the conventional hoisting device of this type, and also allows the hanging length of the pair of wire ropes to be approximately The object of the present invention is to provide a hoisting device that can be adjusted to have equal lengths.

An embodiment of this invention will be described below with reference to FIGS. 2 and 3.

In the figure, reference numeral 7 denotes an equalizer hanger that is swingably supported on the support frame of the hoisting machine main body 1 by a hanger shaft 8, and 9 is connected to the equalizer hanger 7 so as to be able to swing around a shaft 10 as a fulcrum. In the supporting member, the center of the shaft 10 is disposed approximately below the center of the winding drum 2 in the axial direction.

Reference numeral 11 denotes a pair of substantially cylindrical first support members which are swingably connected to the support member 9 by a shaft 12, and are arranged at symmetrical positions with respect to the shaft 10. .

13 is a thrust bearing 1 attached to the pair of first supporting members 11.
A pair of support shafts are rotatably supported via a pair of first support members 11, and a male thread is engraved on a protruding portion 13a from the lower end of the pair of first support members 11, and a male thread is provided at a predetermined interval in the axial direction. A plurality of small diameter through holes 13b are bored.

Reference numeral 15 is a pair of cylindrical second support members which are threadedly connected to the projections 13a of the pair of first support members 11 and have a small diameter through hole (not shown) opposite to the small diameter through hole. A pair of adjusting members are provided with a through hole 15a at their lower ends.

Reference numeral 16 denotes a cotter pin fitted across the small-diameter through-holes 13b of the pair of support shafts 13 and the small-diameter through-holes (not shown) of the pair of adjustment members 15, and the pair of support shafts 13 are connected to the corresponding pair of support shafts 13. The adjustment member 15 is prevented from rotating.

Reference numeral 5 designates one wire rope, the second end of which is fixed to the right end of the winding drum 2 in the figure, is wound around the center, suspends one sheave 4a of the hook block 4, and the other end passes through the through hole 15a, and one terminal fitting 17 fixed to the other end is supported by one of the pair of adjustment members 15.

Reference numeral 6 designates the other wire rope, one end of which is fixed to the left end of the winding drum 2 in the figure and wound around the center, suspends the other sheave 4b of the hook block 4, and has the other end fixed to the left end of the winding drum 2 in the drawing. The other terminal fitting 17, which passes through the hole 15a and is fixed to the other end of the wire rope 6, is supported by the other of the pair of adjustment members 15.

The rest of the configuration is the same as that of the conventional device, so the explanation will be omitted.

In this structure, the hook block 4
When performing cargo handling work by suspending a load on the winding drum 2 in the winding or winding direction, a pair of wire ropes 5,
If the hanging lengths of the winding drums 6 are approximately equal, the hooks 4C on which the load is suspended will move up and down approximately below the central portion of the winding drum 2 in the axial direction.

Also, the cutting length of the pair of wire ropes 5 and 6, the error in the rope groove machining of the winding drum 2, and the difference between the wire ropes 5 and 6 of the winding drum 2,
If there is a small error in the dimensions of the fixed part, etc., and a small error in the hanging length of the pair of wire ropes 5, 6,
The support member 9 rotates about the shaft 10 so that the shorter wire rope is upward, and the pair of first support members 11 rotate about the shaft 11, and the pair of sheaves 4a
, 4b can be approximately balanced.

However, if the above-mentioned error is large, the hanging lengths of the pair of wire ropes 5, 6 will be significantly different, the support member 9 and the hook block 4 will be greatly inclined, and the wire ropes 5, 6 and the sheave 4a, 4b will be in a state of shedding, which will not only cause early damage to the wire ropes 5, 6 and the hook block 4, but also hinder cargo handling operations.

In such a case, remove the cotter pin 16 and rotate the adjustment member 15, which supports the wire rope with the longer hanging length, upward while supporting the shorter hanging length. Adjustment member 15 is rotated so as to move downward to adjust each hook block 4 to be horizontal.

Furthermore, although the pair of wire ropes 5 and 6 tend to twist due to load swings, etc., since one end of the pair of wire ropes 5 and 6 is rotatably supported by the pair of support members 11, the wire ropes 5 and 6 tend to twist. 6 kinks are prevented.

Further, the pair of first support members 11 are connected to the support member 9 by the shaft 12.
Since the support member 9 is movably supported, even if the support member 9 moves, the thrust bearing 14 and the joint portions of the wire ropes 5 and 6 with the end fittings 17 will not be damaged.

As described above, the present invention includes a hanging shaft having both ends fitted into a support frame formed below the axial center of the winding drum of the main body, and a hanging shaft that is swingably supported on the hanging shaft. An equalizer sheave hanger, a support shaft connected to the axial center of the equalizer sheave hanger, a support member supported with this support shaft as the center of swing, and a support member connected to the support member at symmetrical positions from the center of swing. a pair of support shafts, each of which is rotatably supported by the pair of first support members via a thrust bearing; The protrusion from the first support member is formed with a male thread, and the male thread has a pair of support shafts each having a plurality of through holes arranged in the axial direction, passing through the male thread in the radial direction. a pair of adjusting members that are screwed onto the pair of support shafts, and each of the pair of support shafts has a through hole that can be opposed to any one of the plurality of through holes; a pair of locking members fitted across the through holes of the pair of support shafts and the through holes of the pair of support shafts, and one end of each of the locking members is coupled to both ends of the winding drum, and A pair of wire ropes are provided, each of which suspends a hook block wound around the center side and has a pair of sheaves, and each of which is connected to the other end of each wire rope is supported by the pair of adjustment members. This structure prevents the wire rope from becoming entangled and untwisting, thereby extending the life of the wire rope.

Furthermore, since the hanging lengths of the pair of wire ropes can be adjusted by the pair of adjustment members, the efficiency and safety of cargo handling operations are significantly improved.

In addition, damage to the rotation mechanism of the wire rope end is less likely to occur.
Furthermore, there are effects such as speeding up the wire rope replacement work.

[Brief explanation of the drawing]

Fig. 1 is a structural diagram of a conventional hoisting device with four wire ropes, Fig. 2 is a structural diagram showing an embodiment of this invention, and Fig. 3 is a partial sectional view of the main parts of this invention. It is. In the figure, 1 is the main body of the hoist, 2 is the winding drum, 4 is the hook block, 4a, 4b are the sheaves, 5, 6 are the wire ropes, 9 is the support member, 10 is the shaft, 11 is a pair of support members, 12 Ha axis,
13 is a support shaft, 13a is a protrusion, 13b is a small diameter through hole,
14 is a thrust bearing, 15 is a pair of adjustment members, 16 is a cotter pin, and 17 is an end fitting. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A hoisting machine main body, a support shaft formed below the center of the winding drum in the axial direction of the main body, and a hanging shaft having both ends fitted into the shaft, and an equalizer thief suspension swingably supported on this hanging shaft. a support shaft connected to the axial center of the equalizer thief hand; a support member supported with this support shaft as the center of swing; a pair of first bearing members rotatably supported by the pair of bearing shafts, each rotatably supported by the pair of first bearing members via a thrust bearing; A pair of support shafts each having a male threaded part formed on the protruding part from the supporting member and having a plurality of through holes arranged in the axial direction passing through the male threaded part in the radial direction; a pair of adjustment members each having a through hole that is threaded onto the support shafts of the pair of support shafts and that can face any one of the plurality of through holes in each of the pair of support shafts, each of the pair of adjustment members; a pair of locking members fitted across the through-hole and each through-hole of the pair of support shafts, and one end of each of which is coupled to both ends of the winding drum and positioned at the center of the winding drum; A pair of wire ropes that suspends a hook block that is wound and has a pair of sheaves, and each of which has a terminal fitting connected to the other end thereof is supported by the pair of adjustment members. Device.