JPH10152295A - Wire winding device of derricking jib crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire winding device capable of eliminating the manual winding and performing the mechanical winding while applying the sufficient tension using the drive source in performing the wiring to both a level luffing drum and a derricking drum in a wire winding device of a derricking jib crane. SOLUTION: A wire winding device of a derricking jib crane comprises a bearing, a derricking drum 14 which is supported by the bearing and around which a derricking wire 7 is wound, a level luffing drum 15 which is continuously provided on the derricking drum 14 and around which a winding-up wire 5 is wound, a braking means 29 which is provided on at least one of two drums 14, 15, a clutch means 32 to connect/disconnect the rotation between two drums, and a driving means 17 to rotate the drum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire winding device for a jib crane.

[0002]

2. Description of the Related Art A hoisting jib crane is provided with a horizontal draw-in drum for winding one end of a hoisting wire for a hoisting load in order to keep the height of a hoisting load constant when the jib is raised and lowered. The hoisting drum around which the hoisting wire for raising and lowering the jib is wound is integrally formed, and the hoisting wire and the hoisting wire are wound in opposite directions (winding in one winding direction and winding out in the other direction). Thereby, for example, at the time of raising the jib, the hoisting wire is fed out at the same time as the winding of the undulating wire, and the structure in which the suspended height of the suspended load is maintained to a certain extent by the drop of the suspended load has been made. . However, when wiring the crane, it is not possible to use the drum driving means to wind the wires on the horizontal drum and the undulating drum oppositely to each other, and to wind the wires using the driving means on either one of the drums. After that, the other drum had to be manually wound with heavy wire.

[0003]

SUMMARY OF THE INVENTION In view of the above situation, the present invention eliminates the need for manual operation when wiring to both the horizontal draw-in drum and the up-and-down drum in a wire winding device of an up-and-down jib crane, and eliminates the need for a drive source. An object of the present invention is to provide a wire winding device capable of mechanical winding while applying sufficient tension.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a winding device for a jib crane according to the present invention is provided.
A bearing, an undulating drum supported by the bearing and wound with an undulating wire, a horizontal retracting drum connected to the undulating drum and wound with a hoisting wire, brake means provided on at least one of the two drums, It comprises clutch means for connecting or disconnecting rotation between two drums, and one drive means for rotating the drums. According to the second aspect, the rotating shaft of the up-and-down drum and the rotating shaft of the horizontal drawing drum are configured to be coaxial. According to the third aspect, the brake means is provided on the undulating drum. According to the fourth aspect, the clutch means is constituted by the pin and the hole.

[0005]

FIG. 1 is a perspective view of a crane in which a jib is raised and lowered, and a case of a small crane having a relatively small rated load will be described. FIG. 2 is a perspective view showing the wire winding device 18. The frame 1 has a jib 3 having one end rotatably fixed to the frame 1 and a jib tip sheave 2 attached to the other end, and a gate type having a lower portion fixed to the frame 1 and a plurality of sheaves 6 attached to the upper portion. A gantry 8, a hoisting device 13 for lifting the suspended load, and a wire winding device 18 for raising and lowering the jib 3 and keeping the suspended load constant in the horizontal direction. Hoisting device 1
Reference numeral 3 denotes a hoisting drum around which the hoisting wire 5 is wound, one drive means for driving the hoisting drum, and a brake for preventing a suspended load from dropping. Wire winding device 1
Reference numeral 8 denotes an up / down drum 14 around which the up / down wire 7 is wound, a horizontal retracting drum 15 connected to the up / down drum 14 and around which the hoisting wire 5 is wound, and brake means 29 provided on the up / down drum.
And one driving means 1 for driving the two drums
7 is comprised. .

Next, the arrangement of the wires will be described. One end of the hoisting wire 5 is fixed to the hoisting drum of the hoisting device 13, and the gantry upper sheave 6, the jib tip sheave 2, the hook sheave 4, the jib tip sheave 2, the gantry It is fixed to the horizontal drawing drum 15 through the upper sheave 6. The undulating wire 7 has one end fixed to the undulating drum 14 and is fixed to the jib tip through the gantry upper sheave 6.

The wire winding device will be described in detail with reference to FIG. In the wire winding device 18, one rotating shaft 33 is supported at one end by the bearing 20 and at the other end by the speed reducer 25. On the shaft of the rotating shaft 33, the up-and-down drum 14 having two flanges at each end is provided. The drum 15 is provided continuously. The speed reducer 25 serves as a bearing, and a motor 26 for driving the two drums and the motor 2
The drive means 17 is constituted together with the stop brake 27 of No. 6. The undulating drum 14 around which the undulating wire 7 is wound is rotatable with respect to the rotation shaft 33, and has flanges 2 at both ends.
1 and 28 are provided. One of the flanges 28 is a bearing 20
It is also provided on the side and also serves as a brake disk of a brake means 29 for stopping the rotation of the undulating drum 14.
The other flange 21 is connected to the horizontal pull-in drum and constitutes clutch means together with a horizontal pull-in drum flange 22 described later. The horizontal retraction drum 15 is fixed to a rotating shaft 33 and rotates via a speed reducer 25 together with the driving of a motor 26. A coaxial hole 23, 23 communicating with the flange 21 of the hoist drum is provided in the flange 22 on the hoist drum side. ing. By inserting the pin 24 into the holes 23 provided in the two flanges 21
The clutch means 32 transmits the rotational force of the horizontal retraction drum 15 to the up-and-down drum 14, and cuts off the rotational force by extracting the pin 24. Undulating drum 1
4 and the horizontal pull-in drum 15 are coaxial, and can rotate integrally or independently by the action of the clutch means 32. This means that only the horizontal pull-in drum 15 can be rotated by pulling out the pin 24 with the brake means 29 being operated and the rotation of the undulating drum 14 being stopped.

The procedure of wiring when assembling a crane equipped with the wire winding device 18 will be described. (1) Jib 3, gantry 8, hoisting device 1 on frame 1
3. Attach the wire winding device 18 and support the jib 3 with another assembling crane or place it on a jib support (not shown). (2) Activate the driving means 17 to wind the undulating wire 7 around the undulating drum 14 and fix it to the jib tip through the gantry upper sheave 6. The hoisting drum 14 is rotated by the driving means 17 to wind the hoisting wire 7, the jib 3 is raised to an arbitrary position, and the sling of the unnecessary assembly crane is removed. (3) The hoisting wire 5 unwound from the hoisting drum 9 of the hoisting device 13 is fixed to the horizontal draw-in drum 15 through the gantry upper sheave 6, the jib tip sheave 2, the hook sheave 4, the jib tip sheave 2, and the gantry upper sheave 6. I do. (4) The undulating drum 14 is fixed by the brake means 29, and the pins 24 are removed from the holes 23. (5) The drive device 17 is operated to wind the hoisting wire 5 having a length corresponding to the jib angle (height) on the horizontal drawing drum 15. At this time, the winding directions of the hoisting wire 5 wound on the horizontal drawing drum 15 and the hoisting wire 7 wound on the hoisting drum 14 are reversed. (6) The holes 23 are aligned, the pins 24 are inserted into the holes 23, 23 so that the horizontal retraction drum 15 and the undulating drum 14 can co-rotate, the brake means 29 is released, and the wiring is completed.

In this state, a crane operation becomes possible. When the undulating drum 14 is rotated by the driving device 17 in a direction in which the undulating wire 7 is wound, the horizontal retracting drum 15 is rotated.
The hoisting wire 5 wound up is unreeled, and the suspended load is relatively lowered while the jib 3 is raised.

[0010] As a modification of the wire winding device, the rotating shaft of the hoisting drum and the horizontal drawing drum may be two in parallel so that the winding drum can have a sufficient length. The clutch means may be constituted by pins and holes, or may be an electromagnetic clutch, a key, a claw clutch or the like.

[0011]

According to the present invention configured as described above, the manual work for winding the hoisting wire 5 around the horizontal drawing drum 15 is eliminated, and the work is safe. Further, since the driving device 17 is used, the hoisting wire 5 can be wound around the horizontal pull-in drum 15 in a state where a sufficient tension is applied, and the cause of turbulent winding can be eliminated. According to claim 2, the undulating drum 14
And the horizontal pull-in drum 15 are formed on one concentric rotating shaft 33, so that the arrangement of the plurality of gantry upper sheaves 6 is simplified without interfering with each other,
The number of parts and weight can be reduced. According to the third aspect, since the brake means 29 is provided on the undulating drum 14, the angle of the jib 3 can be stopped at an arbitrary position according to the condition of the site, and the jib 3 is supported by the assembling crane. And the jib 3 need not be left on the jib support. According to claim 4, since the clutch means 32 is constituted by the pin 24 and the holes 23, 23,
The maintenance is visually confirmed when the pin 24 is pulled out, so that the daily inspection is reliable.

[Brief description of the drawings]

FIG. 1 is a perspective view of an up-and-down jib crane.

FIG. 2 is a perspective view of a wire winding device.

[Explanation of symbols]

 Reference Signs List 3 jib 5 hoisting wire 7 undulating wire 14 undulating drum 15 horizontal draw-in drum 17 drive means 18 wire winding device 20 bearing 29 brake means 32 clutch means

Claims (4)

[Claims] 1. A bearing, an up / down drum supported by the bearing and wound with an up / down wire, a horizontal retracting drum connected to the up / down drum and wound up by a hoisting wire, and a brake provided on at least one of the two drums Means, a clutch means for connecting or disconnecting rotation between the two drums, and one drive means for rotating the drums. 2. The wire winding device for an up / down jib crane according to claim 1, wherein the up / down drum and the horizontal draw-in drum are formed on concentric rotating shafts. 3. The wire winding device for an up / down jib crane according to claim 1, wherein said brake means is provided on an up / down drum. 4. A wire winding device for an up-and-down jib crane according to claim 1, wherein said clutch means comprises a pin and a hole.