JPH0734073Y2 - Man lift for tower crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a man lift for a tower crane for moving up and down to an operator house provided on the top of a mast of the tower crane.

[Prior Art] In a tower crane C as shown in FIG. 3, a ladder (not shown) provided inside the mast is usually used for lifting and lowering to an operator house H provided at the top of the mast 1. Was there.

Since this ladder is installed vertically, it is dangerous to move up and down, and the arm becomes tired. Therefore, elderly or female operators cannot move up and down. Moreover, now
Even ordinary operators are required to be able to work more easily and safely.

For this purpose, a technique of providing a man cage in the mast is disclosed in Japanese Patent Laid-Open No.
No. 63-315493. However, such known techniques are not suitable for climbing tower cranes.

[Problems to be Solved by the Invention] Accordingly, an object of the present invention is to provide a manlift for a tower crane, which has a simple structure and is suitable for climbing.

[Means for Solving the Problems] According to the present invention, in a man lift for a tower crane for moving up and down to an operator house provided on the top of the mast of the tower crane, a frame (2) provided on the upper part of the mast (1) is used. ) Is provided with a guide wire tensioning device (3), a sheave (7), and a boarding / alighting stage (8) having a door (8a) through which a mangage (12) can pass, and the guide wire tensioning device (3) is provided. Is a bolt, and the bolt (3) is screwed to the nut (4) embedded in the frame (2) and the nut, and hooks (6, 6) are attached to the bolt (3). Another hook (10, 10) is attached to the base (9) of the mast (1) so as to face the hook (6, 6), and the hook (6, 6) and the other hook (10) are attached. , 10) between the guide wires (11, 11). Is, the guide wire (11, 11) are provided wire-odd portion for climbing (11a) is the Mankeji (12)
Is guided to the guide wire (11, 11) by the guide ring (13, 14), and the man cage (12) is the hanging wire (17).
The operation cable (22) connected to the electric winch (18) via the sheave (7) and attached to the man cage (12) is wound around the cable reel (23), and the frame (2) and the base ( Elevating switches (19, 20, 21) are provided in the 9) and the cage (12), respectively.

[Description of Action and Effect] Therefore, the operator moves the man cage up and down by operating the elevating switch of the frame or the like to enter or leave the operator house. At this time, the man cage is guided by the guide wire, but since there is a stage for getting on and off, it is safe to move up and down from the man cage, and there is no problem in passing the man cage by opening and closing the door.

And when climbing the tower crane, the mast unit is added, but there is a surplus in the guide wire,
At the time of replenishment, the guide wire may change its fixed position with the hook.

And the guide wire is a tensioning device for the guide wire,
The guide wire can be adjusted to an appropriate tension after the climbing work is completed.

Thus, according to the present invention, it can be suitably implemented as a man lift for a climbing tower crane.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a manlift frame generally designated by the reference numeral 2 is provided above the mast 1.

The frame 2 includes a pair of guide wire tensioning devices 3, 3
, A sheave 7, and a stage 8 for getting on and off, which has a passage opening by means of a door 8a that automatically opens and closes when passing through the cage. As shown in FIG. 2, the guide wire tensioning device 3 is composed of bolts, and is composed of a nut 4 embedded in the frame 2 and a lock nut 5 screwed onto the nut 4, and the bolt 3 has a hook 6 attached thereto. Is installed. Further, another hook 10, 10 is erected on the base portion 9 of the mast 1 so as to face the hooks 6, 6, and a guide wire 11 is attached between both hooks 6, 10 for tensioning the guide wire. It is tensioned by the bolt 5 of the device 3. When the tower crane C shown in the figure is a bell climbing type in which the mast unit 1a is fastened by bolting the flange 1b with bolts to attach the guide wire 11 to another hook 10, a wire extra portion 11a is provided and the unit 1a is provided. It is possible to cope with the increase and decrease of the vertical distance according to the addition of.

A man cage, generally designated by 12, is vertically guided on these guide wires 11, 11.

The man cage 12 is guided by the guide wire 11 by a pair of upper and lower guide rings 13 and 14, and the upper guide ring
An unillustrated emergency stop catcher is provided at 13. A wire mesh 15 is provided on the outer periphery of the man cage 12, and an entrance / exit door 16 is provided on one surface. The man cage 12 is an electric winch provided on the manlift frame 2 via a sheave 7 by a hanging wire 17.
It is connected to 18. It should be noted that the man cage 12 can be configured to have a structure adapted to the shape of the mast.

The electric winch 18 may be a small winch depending on the weight of the man cage 12 and the occupant. A parent-child motor type winch is preferable in order to reduce shock at the time of starting and stopping.

On the other hand, the man lift frame 2, the base 9 and the man cage 12 have push button switches 19, 20 and 20 for lifting operation, respectively.
21 are provided. Of these, the switches 19 and 20 are connected to the electric winch 18, respectively, and the switch 21 of the mangage 12 is connected to the electric winch 18 and a lighting power source via the cable reel 23 by the operation cable 22.
Reference numeral 1c in the drawing is a landing provided inside the mast 1 mainly for connecting work and inspection work of the mast unit 1a.

When operating the crane C, the operator gets on the mangage 12 from the base 9, operates the switch 21 to ascend, stops at the mangage frame 2, and enters the operator house H from the stage 8. When going down, the procedure is reversed. Also,
If it is necessary to inspect the fastening bolts or the like of the flange 1b during the ascending / descending operation, the switch 21 is operated to stop the man cage 12 at the required position.

[Effects of the Invention] As described above, the present invention has the following excellent effects.

(I) Since the tension of the guide wire can be adjusted, the guiding of the man cage is reliable.

(Ii) Since the boarding / alighting stage with a door is provided, the boarding / alighting is safe and the operation of the man cage is not hindered.

(Iii) Since the guide wire has an extra portion, the work can be done easily by changing the fixing position with the hook during climbing.

(Iv) The mancage can be properly moved up and down with a simple structure.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is an explanatory view showing an example of a tensioning device, and FIG. 3 is a side view showing an example of a tower crane in which the present invention is implemented. C: Tower crane, 1 ... Mast, 2 ... Frame, 3
...... Guide wire tensioning device, 4 ...... Nut, 6 …… Hook, 7 …… Sheave, 8 …… Embarkation stage, 8 a ……
Door, 10 ... Another hook, 11 ... Guide wire, 12 ... Man cage, 17 ... Suspension wire, 18 ... Electric winch, 1
9, 20, 21 …… Push button switch for lifting operation

Claims (1)

[Scope of utility model registration request] 1. A tower crane man lift for raising and lowering to an operator house provided on the top of a mast of a tower crane, wherein a guide wire tensioning device (3) is provided on a frame (2) provided on an upper part of the mast (1). ), A sheave (7), and a stage (8) for getting on and off having a door (8a) through which the man cage (12) can pass, and the tensioning device (3) for the guide wire is constituted by a bolt, and the bolt (3 ) Is screwed to a nut (4) embedded in the frame (2) and the nut, and hooks (6, 6) are attached to the bolt (3), and the base of the mast (1) is attached. Another hook (10, 10) is attached to the (9) so as to face the hook (6, 6), and a guide wire (between the hook (6, 6) and the other hook (10, 10) is provided. 11, 11) is stretched and its guide wire (11, 11) Wire-odd portion for climbing (11a) is provided, said Mankeji (12)
Is guided to the guide wire (11, 11) by the guide ring (13, 14), and the man cage (12) is the hanging wire (17).
The operation cable (22) connected to the electric winch (18) via the sheave (7) and attached to the man cage (12) is wound around the cable reel (23), and the frame (2) and the base ( 9) and the man cage (12) are provided with lifting switches (19, 20, 21), respectively, and a man lift for tower crane.