JPH0711099Y2 - Endless winch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial field of application: The present invention relates to an endless winch suitable for use in hoisting of a high lift.

2. Description of the Related Art: It is well known, without mentioning, that as a driving winch for a suspension line used in a heavy machinery such as a crane, a single-body wind-up type is often used. is there. Further, an endless type in which a take-up reel is used together is already known as a means for pulling or hoisting operation by applying a driving force to a rope without winding the winch winding cylinder.

Problems to be solved: Recently, due to the progress of construction technology and effective use of land, the construction of high-rise buildings has increased, and as a crane to be used with it, hoisting work of materials and the like at high lift is also required. The number of winches mounted on a crane has naturally increased, and it has become necessary to have a high lift.

However, in the case of a single-body winch, apart from its driving force, the length of the take-up rope becomes naturally long for high-lift heads, and the take-up drum must be taken up in multiple stages unless the diameter of the take-up drum is increased. Especially, the head is over 150m and 200-2
At 50 m, the number of rope winding stages in the winding drum is 10
There are up to 12 stages, and the multi-layer winding causes the rope in the upper layer to bite between the ropes in the lower layer, hindering the hoisting work. Since a very long rope will be used in particular, frequent application of local external force to this rope will cause strand breakage, and if such a failure occurs, it will cause a great deal of trouble when replacing the rope. It will be expensive.

Another problem is that ropes used at high lifts rotate in the twisting direction added to the rope as the distance from the tip of the crane boom increases, and the rope extends in the lowering direction. A phenomenon in which the rope extending in the raising direction naturally rotates and twists easily occurs.
Therefore, a method of interposing a spacer between the two suspended ropes to prevent the twisting has been considered, but since the lift is large for many minutes, there is little effect. . As a measure to prevent such a twisting phenomenon of the rope, a method of using a rope having an S twist in the twisting direction and a Z twist having the opposite twist direction is considered, and it is being partially put into practical use. However, even if this method is adopted, it does not solve the problems caused by the multistage winding as described above.

Furthermore, when both the S-twisted rope and the Z-twisted rope are used together, it is naturally a requirement that both ropes can be driven in synchronization at all times. This is difficult for the single-cylinder type, which has the above-mentioned problems. Further, if an endless winch is used, it is necessary to operate the two winches in synchronism with each other, and the installation place becomes large, which is unsuitable for mounting a crane.

An object of the present invention is to provide an endless winch having a function suitable for a high lift having a simple and effective structure which can rationally perform operation at a high lift in which such problems are solved.

Means for Solving the Problems: The present invention provides a drive side drum connected to an output shaft of a drive mechanism directly connected to an electric motor, a driven side drum, and a frame for supporting the drive side drum and the driven side drum. The drive side drum and the driven side drum are provided with rope grooves that are symmetrically oriented from the center in the width direction, and have a different axial distance between the driven side drum and the driven side drum. They are arranged in parallel at a distance, and are configured such that an S-twist rope and a Z-twist rope are synchronously wound a plurality of times on both drums via a rope guide to give tension to both ropes. It is an endless winch.

In the present invention, the driving side drum and the driven side drum are driven by a method in which the driven side drum is idled and the driven side drum is synchronously rotated by the movement of the rope wound between the driven side drum and the driven side drum. It is more preferable to use a drive system in which the side drum and the driven side drum are connected by a gear train so as to drive them synchronously.

Further, the supporting frames of the driving side drum and the driven side drum may be supported on the base at the same level, and the axial positions of both drums may be arranged vertically.

Function: The endless winch of the present invention having the above-mentioned structure has an S-twisted rope and a Z-twisted rope to be driven and operated.
Each of the S-twisted and Z-twisted ropes is synchronously wound from the driven-side drum to the driving-side drum in order from the rope groove on the outer end side of both drums to the inner side (or vice versa), in order symmetrically. The respective ropes are used at the winding / unwinding portions of the respective drums so that they can be properly wound around the rope grooves provided in the respective drums by, for example, a rope guide.

Both ropes wound around are wound around a take-up reel driven by a torque motor installed separately or connected to the feed side, and the tension is constantly applied to the rope to feed it to the driven drum. A driving force is applied by winding the drum around the drum several times.

Therefore, the unwound S-twist rope and the Z-twist rope are synchronously driven on both drums and guided by the rope grooves on each drum to move symmetrically from both outer sides to the center and vice versa. Therefore, the thrust in the axial direction of the support shaft of each drum is canceled out, so that the thrust in one direction normally generated in the winding drum support part of the winch is always canceled out in this winch. It will not occur. Therefore, even if the start / stop differential is intense,
At the bearing, almost only the radial load is applied,
The durability of the bearing has been remarkably improved. Moreover, since the S-twisted rope and the Z-twisted rope are driven in synchronism with each other, it is used at a high lift to cancel the rotation of the hanging portion and eliminate the twisting phenomenon in the rope hanging portion. Material can now be smoothly lifted and lowered at high lift.

Embodiment: An embodiment of the endless winch of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical cross-sectional view showing a pair of support frames 2 and 2'standing on a base 1 in parallel with each other at required intervals, and between the support frames 2 and 2 '. , A driving-side drum 10 and a driven-side drum 15 are rotatably arranged in parallel at predetermined intervals, and are attached to a side surface of the other supporting frame 2'from a motor 20 with a brake attached to one side surface of the supporting frame 2 The drive-side drum 10 and the driven-side drum 15 rotate at a constant speed via the gear wheel support 21.

The drive-side drum 10 and the driven-side drum 15 have the same diameter, and the rope grooves 11 on the outer peripheral surface are symmetrical with respect to the center portion in the width direction from the outside to the center side (or vice versa). However, multiple ropes (usually 4 ~
7), spirally engraved. (See FIG. 2) In both drums 10 and 15, support shafts 13 and 16 are supported by bearings 3 and 3'provided in support frames 2 and 2 '. The support shaft 13 of the drive-side drum 10 is a hollow shaft, and a drive shaft 22 directly connected to the output shaft of the electric motor 20 (or gear meshing connection) is inserted into the support shaft 13 and is provided at the other end of the drive shaft 22. Driven gear 23 and a driven large gear mounted on the intermediate shaft 24 in the gear box 30 attached to the support frame 2 '.
It is designed to mesh with 25. The gear box
Within 30, the small gear 26 on the intermediate shaft 24, the gear 27 with the support shaft 13 fixed to the drive side drum 10 and the gear 28 with the support shaft 16 fixed on the driven side drum 15 mesh under the same conditions, and the same. Constitutes a gear train which is rotationally driven in the direction. These gear trains are confined in a gear box 30, and are refueled by a well-known refueling means so as to rotate.

35 and 36 are rope guides and support frame
It is attached to 2, 2'via a support fitting 38.

The endless winch of the present invention configured in this way is
Behind the driven side drum 15, for example, as shown in FIG. 4, two take-up reels 40 are installed in which a required tension force is applied to the ropes R1 and R2 by a torque motor 41. The ropes R1 and R2 drawn out from the take-up reels 40 are wound around the drive-side drum 10 and the driven-side drum 15 through the rope guides 35 and 35 in order from the outside to the center, and the ropes adjacent to the drive-side drum 10 are provided. Use the ropes R1 and R2 so that they are fed to the load side through the guide 36.

By driving the electric motor 20 in the normal direction, the drive gear 23 on the drive shaft 22
By applying a rotational force to the intermediate shaft 24 from the driven large gear 25, the small gear 26 on the intermediate shaft 24 drives both gears 27 and 28 meshing with the small gear 26, and the driving side drum 10 and the driven gear are driven. The side drum 15 rotates synchronously, and the ropes R1 and R2 wound around both the drums 10 and 15 are synchronously paid out from the drive side drum 10 to the load side. As described above, one of the ropes R1 and R2 has an S twist and the other has a Z twist, and the two ropes R1 and R2 are hung down on the load side, for example, through a boom tip pulley of a crane. , Rope R that moves in parallel even if the pulley block with hook is hung up and down
Since the twisting directions of 1 and R2 are opposite to each other, even if the free hanging length of the rope is long, the natural turning habit of the rope due to the twisting is offset, and as a result Can be made.

When driving, the axial thrust generated by the rope winding drive on the support shafts 13 and 16 of the drums 10 and 15 is a spiral in which two ropes R1 and R2 are provided on the drum peripheral surface. The ropes are wound and moved in opposite directions along the rope groove 11 and thus cancel each other, and as a result, they hardly act as axial thrust. Therefore, if the rigidity of the drum is increased, the supporting bearing portion can bear only the load in the radial direction and can withstand long-term use.

Although the most general structure has been described above, as shown in FIG. 5, power is transmitted only to the driving drum 10 from the electric motor 20 with brake through the reduction gear mechanism to the supporting shaft of the driving drum 10. Thus, the driven drum 15 can be configured to be driven by the movement of the wrapped rope. In this case, the structure of each part is the same as that of the above-mentioned embodiment except the gear mechanism 21 in the above-mentioned embodiment. Therefore, the same parts are denoted by the same reference numerals.

Further, as another embodiment of the present invention, the driving drum 10 and the driven drum 15 may be arranged vertically. An example thereof is shown in FIG. With this format,
Naturally, the supporting frames 2A and 2A 'are vertical, and the driving side drum 1
Arranging 0 on the lower side is a preferable structure for stability. Of course, it is not limited to this. The structure of each part is almost the same as that of the above-mentioned embodiment.

With such a vertical structure, the installation area can be reduced, which is convenient for mounting on a turning table of a crane or the like.

Effect of the Invention: As described above, the endless winch of the present invention has an S twist rope and a Z twist on the driving side drum and the driven side drum, respectively.
Since the twisted rope and the twisted rope can be synchronously wound and driven, the two ropes can always be driven equally. In addition, since the rope is driven symmetrically while being driven, the thrust in the axial direction on the support shaft of each drum is canceled out, and only the radial load acts on the bearings, so the start / stop The durability of this type of machine, in which the operation of the machine is repeated remarkably, is remarkably improved, and it is useful as a winch for high lift, while preventing twisting in the hanging section by using two ropes with different twists. It can be said that there is.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a side view, FIG. 4 is a view showing a mode related to a rope take-up reel, FIG. 5 and FIG. FIG. 6 is a diagram showing another example. 1 ... base 2,2 ', 2A, 2A' ... support frame 10 ... driving side drum, 11 ... rope groove 13,16 ... supporting shaft, 15 ... driven side drum 20 ... motor with brake, 21 ... gear mechanism 22 ... Drive shaft, 23 ... Drive gear 24 ... Intermediate shaft, 25, 26, 27, 28 ... Gear 30 ... Gear box, 35, 36 ... Rope guide R1, R2 ... Rope, 40 ... Rope take-up reel

Claims (4)

[Scope of utility model registration request] 1. A drive-side drum connected to an output shaft of a drive mechanism directly connected to an electric motor, a driven-side drum, a frame for supporting the drive-side drum and the driven-side drum, and a base on which these are mounted. The drive-side drum and the driven-side drum are provided with rope grooves symmetrically oriented from the center in the width direction, and the driven-side drum is parallel to the driving-side drum with a required axial distance. And an endless winch configured so that a tension force is applied to both of the drums by synchronously winding an S twist rope and a Z twist rope a plurality of times through rope guides. 2. The endless winch according to claim 1, wherein the driven drum is movably supported by the supporting shaft end of the driven drum with respect to the driving drum. 3. The endless winch according to claim 1, wherein the driving side drum and the driven side drum are configured to be synchronously driven by a gear train. 4. The endless winch according to claim 1, wherein the driving side drum and the driven side drum are vertically arranged at a required axial distance and are supported on a base by a supporting frame. .