JPH0680393A - Hoist - Google Patents

Abstract

PURPOSE:To increase the safety of a wire rope by preventing the irregular winding where wire ropes are mutually abraded to cause severe wears, to shorten the service life, and to reduce the safety. CONSTITUTION:In a hoist having a motor part and a reduction gear part at each end and a drum part in the center part, a roller is mounted on the position where the drum is brought into contact with the wire rope or on the position close to the operator when the wire rope is coiled around the drum by passing a roller 1 through a shaft 2 at a wire rope winding part of the drum part, and by means of elastic bodies 5, 6, and then, the roller is pressed in the axial direction of the drum through the elastic force of the elastic bodies 5, 6 and the wire rope 8 is held by the roller 1 and the drum groove.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a hoist using a grooved drum.

[0002]

2. Description of the Related Art A conventional hoist has no device for preventing irregular winding, and when the wire rope oscillates due to extreme load shaking, the angle θ between the drum groove 7 and the wire rope 8 shown in FIG.
₁ became larger and random winding occurred when winding the wire rope.

[0003]

When the wire ropes of the hoist are wound irregularly, the wire ropes are slid against each other, and the wear is severe, the life is shortened, and the safety is lowered. An object of the present invention is to improve safety by preventing irregular winding of a wire rope.

[0004]

In order to solve the above problems, the position A where the drum 13 and the wire rope 8 are in contact with each other when the wire rope 8 shown in FIG.
Or, it is attached at a position C before this, and the roller is pushed in the axial direction of the drum by the elastic force of the elastic bodies 5 and 6, and the wire rope 8 shown in FIG. .

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the present invention will be described below with reference to FIGS. First, FIG. 5 shows the shape of the roller 1 of the present invention. A groove 9 is provided on the outer periphery of the roller 1, and a hole 10 for passing the roller traverse shaft 2 is provided. The shape of the hole 10 is provided with a groove 11 for putting grease in order to reduce friction with the traverse shaft 2. There is.

Next, both ends of the traverse shaft 2 passing through the roller 1 shown in FIG. 1 are fixed by metal fittings 3 and 4 formed of steel plates, and attached to the main body by mounting metal fittings 5 and 6 formed of spring material. By mounting with a spring material, the roller 1 can be pressed in the drum axial direction by utilizing the elastic force of the spring material.

A mounting member 5 formed by molding a spring material shown in FIG.
Fine adjustment of the roller position shown in FIG. 2 in the B-C direction is possible by making the screw hole 12 for attaching the main body 6 of FIG. 6 elongated.

Next, an explanation will be given of the operation when the wire rope is wound with the irregular winding prevention device attached to the main body. As described above, the irregular winding is performed by the drum groove 7 and the wire rope 8 shown in FIG. Since this occurs when the angle θ ₁ becomes large, the angle θ ₁ shown in FIG. 4 is passed between the roller 1 and the drum groove 7 shown in FIG. ₁ can be reduced to the drum groove angle in FIG. 7 and the groove angle θ ₂ of the roller 1.

When the wire rope is wound around the drum or unwound from the drum, the position where the wire rope contacts the drum moves in the drum groove from 8'to 8 as shown in FIG. At this time, the roller 1 also moves on the track of the shaft 2 so that the groove 9 of the roller is caught by the wire rope,
It makes a movement to follow the movement of the wire rope. Here, by forming a shape in which several rollers 1 are connected to each other as shown in FIG. 9, the effect of guiding the movement of the rollers is increased, the stability of the rollers is improved, and the function is improved.

[0010]

By attaching this device to the hoist body, it is possible to prevent irregular winding even if a considerably extreme load shake occurs. As a result, the acceleration of wire rope wear was suppressed and the safety factor was improved in addition to the conventional level.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which an irregular winding prevention device is attached to a hoist.

FIG. 2 is a diagram showing a position where the drum and the wire rope come into contact with each other when the wire rope is wound around the drum.

FIG. 3 is a diagram in which a wire rope is sandwiched between a roller and a drum groove.

FIG. 4 is a diagram showing an angle of a wire rope and an angle of a drum groove when the wire rope swings.

FIG. 5 is a diagram showing a shape of a roller.

FIG. 6 is a diagram showing the shape of a mounting member formed by molding a spring material.

FIG. 7 is a diagram in which the angle of the wire rope and the angle of the drum groove when the wire rope is swung change between the roller groove angle and the drum groove angle by passing between the roller and the drum groove.

FIG. 8 is a diagram showing how the roller also follows and moves when the position where the drum and the wire rope contact each other moves when the wire rope is wound around the drum.

FIG. 9 is a diagram showing an example in which the shape of a roller is increased by one.

[Explanation of symbols]

1 ... Roller, 2 ... Shaft, 3 ... Metal fitting 1, 4 ... Metal fitting 2, 5 ...
Spring material 1, 6 ... Spring material 2, 7 ... Drum groove, 8 ... Wire rope, 8 '... View before wire rope moves, 9 ... Roller groove, 10 ... Hole for passing roller through shaft, 11
… Grooves for inserting grease, 12… Screw holes for attaching the spring material to the main body.

Claims (1)

[Claims] 1. A hoist having a motor section and a speed reduction section on both sides and a drum section in the center, wherein a roller (1) is passed through a shaft (2) and an elastic body is provided in a wire rope winding section of the drum section.
When the wire rope is wound around the drum in (5) and (6), it is attached at a position where the drum and the wire rope come into contact with each other or a position before this, and the elastic force of the elastic bodies (5) and (6) causes the roller to roll in the drum axial direction. Press the wire rope (8) to the roller (1)
And a hoist characterized by being pinched in the drum groove (7).