JPH01242396A - Winch for gondola rope - Google Patents

Abstract

PURPOSE:To make a winch in simple construction and facilitate manufacture by inducing a cable take up on a drum and rewound by a guide pulley of a swing member whose lower end is pivoted at the central bottom of the side. CONSTITUTION:At a certain spacing, a pair are installed in a gondola or on the roof, and one end of each cable is detained with one end of a drum 4, threaded through pulleys 6, 7 passed through a guide roller, and detained with a detaining tool on the roof, and the opposite ends are extended oppositely to be detained with one end of the drum 4. When a motor 5 is rotated in desired direction at the time of taking-up and rewinding, the drum 4 is rotated, and the cable 8 moves in the axial direction from one end of the drum 4 to the other end along a spiral groove 3 depending upon taking-up or rewinding. At this time, a swing member 5 inducing the cable 8 with the guide pulleys 6, 7 swings to the left and right with the bottom as the center, and the cable 8 is held in the perpendicular direction to the drum 4 by the pulley 6 and in tangential direction for the pulley 7, and thus taking-up and rewinding are performed smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a cable hoisting device for a gondola used for construction on the peripheral wall of a building or other structure.

2. Description of the Related Art Conventionally, this type of hoisting device uses a drive motor to rotate a hoisting drum that is rotatably suspended horizontally on a gondola or a platform installed on a rooftop (not shown). Many types of cables are used, in which the cable is suspended between the cables and is wound or rewound. When using such a system, a pair should be placed on both sides of the gondola, or on the roof of a building, with a distance approximately equal to the spacing between the cables, and both ends of the cables should be placed in pairs. are respectively attached to one end of the hoisting drum and to the anchors on the roof.

By the way, in such a hoisting device, since the cable is wound in multiple windings on the hoisting drum, the winding radius of the cable increases as the gondola approaches the rooftop. In addition to being faster and more dangerous, the windings are not always perpendicular to the axis on the hoisting drum and are therefore wound in an orderly manner from the inside to the outside in the radial direction. A so-called random winding condition occurs, in which the winding radius is small in a certain part and becomes large in the vicinity, and as a result, the rope in the part with a large winding radius suddenly becomes There is a problem in that the gondola is subject to shock each time it falls into a part of the narrow winding radius, which is also dangerous.

To solve this problem, a hoisting device as shown in FIG. 3 has come to be used. So, to explain the outline, the support frame 12 established on the machine base 11.
A hoisting drum 14 is rotatably mounted horizontally between 12', and a drum rotation motor 15 is installed on one support frame 12, and on the outer circumferential surface of this drum 14, there are winding drums with opposite twisting directions on both sides of the center as a boundary. Thread grooves 13 and 13' with the same pitch are provided. Further, an auxiliary support frame 18.18' is provided on the machine base 11, and angled guide rails 19.19' are vertically opposed between these frames, and these rails 19.19' Guide roller 20 rolling inside
．． A support member 21.22 having a diameter of 20' is provided, and a cable guide pulley 16.1 is provided at the distal end of this support member 21.22.
7 is horizontally installed rotatably, and a screw stud 23 is screwed into the part that protrudes on the opposite side, and the threaded portion of the screw foot 23 has a screw thread whose twist direction is the same as that of the thread groove 13, 13'. A section 24.24' is formed, the screw stud 23 being rotated by the motor 15 via a pulley 25.26 and a belt 27.

When using such a hoisting device, it is installed on a gondola or on a rooftop, and one end of the cable 28°28' is engaged with the innermost or outermost side of the spiral grooves 13, 13' of the drum 14, respectively. and the other end is a strip 2 that hangs along the wall surface.
The cables 28 and 28' are attached to the roof or the gondola via guide rollers (not shown) arranged on the gondola at intervals equal to the intervals of the cables 28 and 28'. This is done by rotating the screw stud 23.

At this time, the cables 2g and 28' are connected to the spiral groove 13 of the drum 14.
13', the threaded part 24 is rotated 24 degrees 24', and the support member 21.22 and the pulley 16.17 supported thereon are rotated in the same direction. This results in displacement in the direction. As a result, the cables 28.28' are always fed in a direction perpendicular to the drum 14, which prevents the cables 28.28' from getting caught in the peaks between the spiral grooves 13, 13'. winding and unwinding are carried out in an orderly manner.
This prevents the occurrence of one-sided winding and one-sided unwinding.

Problems to be Solved by the Invention Although the hoisting device shown in FIG. 3 has solved the problems of previous hoisting devices, as is clear from the description, its structure is There are problems in that it is extremely complex, difficult to manufacture, and expensive.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the conventional hoisting device as described above, and to provide a hoisting device that is simple in structure, easy to manufacture, and inexpensive.

Means for Solving the Problems In order to achieve the above-mentioned objects, the present invention provides a hoisting drum 4 having a spiral groove 3 for guiding cables on its outer circumferential surface between support frames 2 and 2' established on a machine base 1. is rotatably mounted horizontally, a drum rotation motor 5 is installed on one of the support frames 2, and the lower end of the swinging member 5 is pivotally supported on the machine base 1 at the lower side of the approximately center of the hoisting drum 4. The swinging member 5 is characterized in that cable guide pulleys 6.7 are pivotally supported on the upper and lower sides of the side facing the double drum 4.

For production When using the hoisting device as described above.

Install a pair on the gondola or rooftop at a specified interval,
One end of each cable is attached to one end of the hoisting drum 4, and the boot 1. J 617 and then to a locking device on the roof via a guide roller (not shown), and extends in the opposite direction to be connected to one end of the hoisting drum 4, respectively. When the motor 5 is rotated in a desired direction during winding and unwinding, the winding drum 4 rotates, and the cable 8 is moved from one end of the winding drum to the other end along the spiral groove 3 in accordance with winding and unwinding. tin towards the end
It will move in the s direction. The swinging member 5, which guides the VA cable 8 by a guide pulley 6.7, swings left and right about its lower end. and is held tangentially to the pulley 7.

Effects of the Invention The present invention is as described above, and the strands that are wound onto the winding drum and unwound are guided on the sides by guide pulleys of swinging members pivotally supported at the lower end at the lower center of the drum. Since the swinging member naturally swings due to the tension of the cable during winding and unwinding, the cable is moved naturally by the guide pulley and always almost always against the hoisting drum. The cables can be positioned at right angles, winding and unwinding can be performed smoothly, and the structure is extremely simple and can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a right side view of the same, and FIG. 3 is a perspective view of a typical conventional hoisting device of this type. 1... Machine base, 2.2'... Support frame, 3... Spiral groove. 4... Hoisting drum, 5... Motor, 6, 7... Pulley. Figure 1

Claims (1)

[Claims] 1. A hoisting drum 4 having a spiral groove 3 for guiding cables on its outer circumferential surface is rotatably mounted horizontally between support frames 2 and 2' established on the machine base 1, and one of the support frames 2 is provided for rotating the drum. A motor 5 is installed, and the lower end of the swinging member 5 is pivotally supported on the machine base 1 below the lower center of the hoisting drum 4, and the upper and lower ends of the swinging member 5 on the side facing the upper and lower hoisting drums 4 are cable guide pulley 6
, 7 is pivotally supported.