JP2007099522A - Wiring method for hoisting jib crane - Google Patents

Abstract

The present invention relates to a wiring method for a undulating jib crane, and provides a wiring method capable of winding a machine while applying sufficient tension using a drive source, eliminating manual work when wiring to both a horizontal pulling drum and a undulating drum. The purpose is to do.
SOLUTION: A wire winding device including a brake unit provided on an undulation drum and a horizontal pull-in drum, and a clutch unit that connects or cuts off rotation between the two drums is used to fix the undulation wire to the tip of the jib. Pass the wire through the hook sheave and fix it to the horizontal pull-in drum, then fix the hoisting drum with the brake means, shut off the hoisting drum and hoisting drum with the clutch means, and wind the hoisting wire into the horizontal pulling drum in the winding direction of the hoisting wire Take up in the opposite direction.
[Selection] Figure 1

Description

  The present invention relates to a wiring method for an undulating jib crane.

In a hoisting type jib crane, in order to keep the height of a suspended load constant when the jib is raised and lowered, a horizontal pulling drum is provided to wind one end of a hoisting wire for hoisting load, and the horizontal pulling drum and the jib are raised and lowered. The undulation drum around which the undulation wire is wound is integrally formed, and the undulation wire and the hoisting wire are wound around the respective drums in the opposite direction (one is wound in the winding direction and the other is wound in the feeding direction). Thus, for example, when the jib is raised, the hoisting wire is fed out simultaneously with the winding of the undulating wire, and the substantial suspended height of the suspended load is maintained to a certain extent by lowering the suspended load. . However, when wiring a crane, it is not possible to wind a wire around each of the horizontal drum and the undulating drum using the drum drive means, and the wire is wound around one of the drums using the drive means. After that, he had to manually wind a heavy wire on the other drum.
JP 58-122286 A

  In view of the above situation, the present invention eliminates manual work when wiring to both the horizontal pull-in drum and the hoisting drum in the hoisting type jib crane wiring method, and applies mechanical force while applying sufficient tension using a drive source. An object is to provide a possible wiring method.

In order to achieve the above-mentioned object, a wiring method for a hoisting type jib crane according to the present invention comprises two wires, a hoisting wire used for hoisting a jib and a hoisting wire for raising and lowering a suspended load, and a bearing, A undulation drum supported by the bearing and wound with a undulation wire, a horizontal pull-in drum connected to the undulation drum and wound with a hoisting wire, brake means provided on at least one of the two drums, and the two drums The arrangement of the hoisting wire and the hoisting wire at the time of assembling of the hoisting type jib crane using the wire winding device having the clutch means for connecting or interrupting the rotation between them and one driving means for rotating the drum is as follows: It is characterized by the following procedure.
(1) The driving means is actuated to wind the hoisting wire around the hoisting drum, fixed to the tip of the jib through the gantry upper sheave, the hoisting drum is rotated by the driving means to wind the hoisting wire, and the jib is raised to an arbitrary position.
(2) The hoisting wire drawn out from the hoisting drum is passed through a hook sheave that hangs a suspended load through a jib and fixed to a horizontal pulling drum.
(3) The undulation drum is fixed by the brake means, and the undulation drum and the hoisting drum are shut off by the clutch means.
(4) Actuating the driving device to wind up the winding wire having a length corresponding to the jib angle on the horizontal pulling drum in the direction opposite to the winding direction of the undulating wire wound around the undulating drum;
(5) The hoisting drum and the hoisting drum are connected by the clutch means so that the horizontal pulling drum and the hoisting drum can be rotated together, and the brake means is released.

  According to the present invention configured as described above, manual work when winding the winding wire 5 around the horizontal drawing drum 15 is eliminated, and the work becomes safe. Further, since the driving device 17 is used, the winding wire 5 can be wound around the horizontal drawing drum 15 with sufficient tension applied, and the cause of the turbulent winding can be eliminated.

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 gate shape in which one end is fixed to the frame 1 so that it can be raised and lowered, and a jib 3 having a jib tip sheave 2 attached to the other end, and a lower part fixed to the frame 1 and a plurality of sheaves 6 attached to the upper part. Gantry 8, hoisting device 13 for lifting the suspended load, and wire winding device 18 for raising and lowering the jib 3 and keeping the suspended load constant in the horizontal direction are provided.
The hoisting device 13 includes a hoisting drum on which the hoisting wire 5 is wound, one driving means for driving the hoisting drum, and a brake for preventing the suspended load from dropping. The wire winding device 18 includes a undulation drum 14 around which the undulation wire 7 is wound, a horizontal pull-in drum 15 connected to the undulation drum 14 and around which the winding wire 5 is wound, a brake means 29 provided on the undulation drum, and the 2 It comprises a driving means 17 for driving one drum.

  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, jib tip sheave 2, hook sheave 4, jib tip sheave 2, gantry upper sheave 6. , And is fixed to the horizontal drawing drum 15. Further, one end of the hoisting wire 7 is fixed to the hoisting drum 14, and is fixed to the tip of the jib 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 by a bearing 20 at one end and the speed reducer 25 at the other end, and the undulating drum 14 having two flanges at both ends on the shaft of the rotating shaft 33 and the horizontal pull-in device 18 are provided. A drum 15 is provided continuously. The speed reducer 25 serves as a bearing and constitutes a driving means 17 together with the driving motor 26 for the two drums and a brake 27 for stopping the motor 26.
The hoisting drum 14 around which the hoisting wire 7 is wound is rotatable with respect to the rotary shaft 33 and includes flanges 21 and 28 at both ends. One flange 28 is provided on the bearing 20 side and also serves as a brake disk of the brake means 29 for stopping the rotation of the undulation drum 14. The other flange 21 is connected to the horizontal pulling drum and constitutes clutch means together with a flange 22 of the horizontal pulling drum which will be described later.
The horizontal pull-in drum 15 is fixed to the rotary shaft 33 and rotates through the speed reducer 25 along with the drive of the motor 26. The flange 22 on the undulation drum side is provided with coaxial holes 23 and 23 communicating with the flange 21 of the undulation drum. ing.
By inserting the pin 24 into the holes 23, 23 provided in the two flanges 21, 22, the rotational force of the horizontal drawing drum 15 is transmitted to the undulation drum 14, and the rotational force is cut off by removing the pin 24. The clutch means 32 is configured.
The undulation drum 14 and the horizontal pull-in drum 15 are coaxial, and can be rotated 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 in a state where the brake means 29 is operated and the rotation of the hoisting drum 14 is stopped.

A procedure for wiring in assembling a crane including the wire winding device 18 will be described.
(1) The jib 3, the gantry 8, the hoisting device 13, and the wire take-up device 18 are attached to the frame 1, and the jib 3 is supported by another assembling crane or placed on a jib support stand (not shown).
(2) The driving means 17 is operated to wind the hoisting wire 7 around the hoisting drum 14 and fix it to the tip of the jib 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 crane for assembly that is no longer needed is removed.
(3) The hoisting wire 5 fed out from the hoisting drum 9 of the hoisting device 13 is fixed to the horizontal drawing 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. To do.
(4) The undulating drum 14 is fixed by the brake means 29, and the pin 24 is removed from the holes 23 and 23.
(5) The driving device 17 is operated to wind the winding wire 5 having a length corresponding to the jib angle (height) around the horizontal pulling drum 15. At this time, the winding direction of the hoisting wire 5 wound on the horizontal pulling drum 15 and the hoisting wire 7 wound on the hoisting drum 14 are reversed.
(6) The holes 23 and 23 are aligned, the pin 24 is inserted into the holes 23 and 23, the horizontal drawing drum 15 and the undulation drum 14 can be rotated together, the brake means 29 is opened, and the wiring is completed.

  In this state, crane work becomes possible, and when the hoisting drum 14 is rotated in the direction in which the hoisting wire 7 is wound by the driving device 17, the hoisting wire 5 wound around the horizontal pulling drum 15 is unwound and the jib 3 is raised. However, the suspended load will be lowered relatively.

  As a modified example of the wire winding device, the undulation drum and the horizontal drawing drum may have two rotation shafts in parallel so that the length of the winding drum can be sufficiently taken. In addition to the clutch means comprising pins and holes, an electromagnetic clutch, key, claw clutch or the like may be used.

The perspective view of a hoisting type jib crane. The perspective view of a wire winding device.

Explanation of symbols

3 Jib 5 Hoisting wire 7 Hoisting wire 14 Hoisting drum 15 Horizontal retracting drum 17 Drive means 18 Wire winding device 20 Bearing 29 Brake means 32 Clutch means

Claims (1)

It has two wires, a hoisting wire used for raising and lowering the jib and a hoisting wire for raising and lowering a suspended load, and a bearing, a hoisting drum supported by the bearing and wound with the hoisting wire, and connected to the hoisting drum. A horizontal pull-in drum on which the winding wire is wound, brake means provided on at least one of the two drums, clutch means for connecting or blocking rotation between the two drums, and one drive for rotating the drum A method for wiring the hoisting type jib crane in which the hoisting wire and the hoisting wire are arranged in the crane at the time of assembling the hoisting type jib crane using the wire winding device comprising the means,
(1) The driving means is actuated to wind the hoisting wire around the hoisting drum, fixed to the tip of the jib through the gantry upper sheave, the hoisting drum is rotated by the driving means to wind the hoisting wire, and the jib is raised to an arbitrary position.
(2) The hoisting wire drawn out from the hoisting drum is passed through a hook sheave that hangs a suspended load through a jib and fixed to a horizontal pulling drum.
(3) The undulation drum is fixed by the brake means, and the undulation drum and the hoisting drum are shut off by the clutch means.
(4) Actuating the driving device to wind up the winding wire having a length corresponding to the jib angle on the horizontal pulling drum in the direction opposite to the winding direction of the undulating wire wound around the undulating drum;
(5) The hoisting drum and the hoisting drum are connected by the clutch means so that the horizontal pulling drum and the hoisting drum can be rotated together, and the brake means is released.

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