JPS5851195Y2 - hoisting device - Google Patents

Description

[Detailed description of the invention] This invention involves 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 an improvement of a lifting device such as an electric hoist for carrying out cargo handling operations.

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

In the figure, reference numeral 1 denotes the main body of the soaring machine, which includes a support frame, a hoisting motor with an electromagnetic brake connected to one end of the support frame, and a hoisting motor with an electromagnetic brake connected to the other end of the support frame and connected to the motor. The winding drum 2 is connected to the speed reducer (none of which is shown) and is substantially surrounded by the support frame.

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; Suspend the load.

Reference numeral 5 denotes one 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 from the one sheave 4a to the equalizer sheave 3. → the other sheave 4b → the center 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 the load is suspended on the hook block 4 and the hoisting drum 2 is hoisted or rotated in the direction of hoisting down to carry out cargo handling work, 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. Since it is necessary to disassemble the equalizer sheave 3, the hook block 4ap4b, and the wire rope 5, and to remove the wire rope 5 wound around the winding drum 2, it is necessary to disassemble the equalizer sheave 3, hook block 4, and wind it. This has the drawback that removal work from the shell 2 and reassembly work are required, and the replacement work requires a considerable amount of time.

This invention was made in an attempt to eliminate the drawbacks of the conventional performance apparatus of this type, and one embodiment of this invention will be described with reference to FIGS. 2 and 3.

In the figure, reference numeral 7 denotes an equalizer hanger which is swingably supported by a manual 8 suspended on the support frame of the hoisting machine main body 1, and 9 is connected to the equalizer hanger 1 so as to be swingable about 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 first support members formed in a substantially cylindrical shape that are swingably connected to the support member 9 by a shaft 12, and are arranged at symmetrical positions with respect to the shaft 10, respectively.

13 is a thrust shaft 14 attached to the pair of first supporting members 11.
A pair of support shafts 15 are rotatably supported through a pair of support shafts 13, and 15 is a pair of cylindrical second support members connected to the pair of support shafts 13. In the figure, a through hole 15a is provided at the lower end. ing.

Reference numeral 5 denotes one wire rope, one end of which is fixed to the right end of the winding drum 2 in the figure and wound toward the center, suspends one sheave 4a of the hook block 4, and has the other end fixed to the right end of the winding drum 2 in the drawing. One terminal fitting 16 that passes through the through hole 15a and is fixed to the other end is supported by one of the pair of second supporting members 15.

The other wire rope 6 is fixed to the left end in the figure of the winding drum 2 and is wound around the center, suspends the other sheave 4b of the hook block 4, and the other end The other terminal fitting 15 passes through the through hole 15a and is fixed to the other end portion, and is supported by the other of the pair of second supporting members 14.

Note that the pair of wire ropes 5 and 6 are formed to have approximately the same overall length.

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

In the structure configured in this way, the hook block 4
When carrying out cargo handling work by suspending a load and rotating the winding drum 2 in the winding or lowering direction, the hanging lengths of the pair of wire ropes 5 and 6 are approximately equal, so the load cannot be suspended. The hook 4C moves up and down approximately below the central portion of the winding drum 2 in the axial direction.

If the pair of wire ropes 5, 6 is cut due to an error in the cutting length of the pair of wire ropes 5, 6, an error in the rope groove machining error in the winding drum 2, or a dimensional error in the fixing part between the winding drum 2 and the wire ropes 5, 6, the pair of wire ropes 5, 6 If an error occurs in the hanging length of each of the wire ropes, 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 A pair of sheaves 4a,
The load applied to 4b comes to be approximately balanced.

Also, due to load swing etc., the pair of wire ropes 5, 6
However, since one end of the pair of wire ropes 5 and 6 is rotatably supported by the pair of first support members 11, the twisting is 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 swingably supported, the thrust bearing 14 and the connecting portions of the wire ropes 5 and 6 to the end fittings 16 are not damaged even if the support member 9 swings.

As described above, this invention consists of a hanging manual whose both ends are fitted into a support frame formed below the axial center of the winding drum of the main body, and an equalizer sheave suspension that is swingably supported on the lifting manual. 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 pair of supports connected to the support member at symmetrical positions from the center of swing A vertical line through a bearing shaft, a pair of cylindrical first bearing members each swingably supported on the pair of bearing shafts, and a thrust bearing disposed at the lower end of the pair of first bearing members. a pair of support shafts rotatably supported around the center; a pair of second support members each connected to the pair of support shafts and formed in a cylindrical shape with an inward flange at the lower end; and one end of each is connected to both ends of the winding drum, and a hook block is wound around the center of the winding drum and has a pair of sheaves, and is connected to the other end of the winding drum. Since the pair of terminal fittings are configured to include a pair of wire ropes of approximately equal length rotatably supported by the flanges of the pair of second supporting members, the wire rope entanglement is prevented. , the twisting back is prevented.

Further, since the rotating mechanism of the wire rope end portion is not damaged, damage to the supporting end portion of the wire rope is prevented.

Further, there is an effect that the wire rope replacement work becomes extremely quick.

[Brief explanation of the drawings] Fig. 1 is a block diagram of a conventional performance device with four wire ropes, Fig. 2 is a block diagram showing an embodiment of this device, and Fig. 3 is a diagram showing the main parts of this device. It is a partially sectional view. In the figure, 1 is the main body of the sojo, 2 is the winding drum, 4 is the hook block, 4a and 4b are the sheaves, 5 and 6 are the wire ropes, 9 is the support member, 10 is the shaft, 11 is the first support member, 12 is the axis,
14 is a thrust bearing, 15 is a pair of second support members,
15a is a flange. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] The main body of the sojo machine, a hanging hand shaft whose both ends are fitted into a support frame formed below the axial center of the winding drum of this main body, and an equalizer sheave hanging hand that is swingably supported on this hanging hand shaft. , 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 pair of supports each connected to this support member at symmetrical positions from the center of swing. A shaft, a pair of cylindrical first support members each swingably supported by the pair of support shafts, and a vertical line through the thrust bearings respectively disposed at the lower ends of the pair of first support members. A pair of support shafts rotatably supported as a center, and a pair of second support shafts each connected to the pair of support shafts and formed in a cylindrical shape with an inward flange at the lower end.
a supporting member, one end of which is connected to both ends of the winding drum, the hook block being wound around the center of the winding drum and having a pair of sheaves; A hoisting device comprising a pair of wire ropes having substantially equal lengths, each of which is rotatably supported by a pair of terminal fittings connected to the collar portion of each of the pair of second support members.