SU1230972A1 - Tower crane - Google Patents

Description

FIELD OF THE INVENTION The invention relates to a lifting and transport machinery, namely, tower cranes.

The purpose of the invention is to improve the performance of the crane.

FIG. 1 shows a tower crane, a general view; in fig. 2 - crane with the holder installed in the lower position, and the boom, lowered down, general view; in fig. 3 shows the node I in FIG. 2 (seizure of the boom rush); in fig. 4 is a view A of FIG. 3; in fig. 5 - tower crane with a pull-over, stored on a tension device, general view; in fig. 6 — node II in FIG. 5 (tensioning device); in fig. 7 - crane with boom inclined upwards, general view.

The tower crane consists of a running frame 1, on which a rotating platform 2 with a tower 3 is installed, along which the holder 4 can move with a beam boom 5 suspended on the cradle 6 having insert 7. The raschal 6 is attached to the eyes 8 on the lower boom lines 5, passes through the blocks 9 on the top of the holder 4 and through the equalizing unit 10 is fixed on the end of the strut. The strut 11 is hinged to the holder 4 at one end, and connected to the head of the holder 4 by the tie 12 12. The rope of the mounting winch 13, which serves to lift the tower 3 into a vertical position when mounting the crane, forms a mounting pulley 14 between the mounting stand 15 and spacer 11, as well as equalizing pulley 16 between the yoke 4 and the head of the tower 3.

The mounting 14 and equalizing 16 tackles are made of the same multiplicity, which ensures a constant tilt angle of the boom 5 when the holder 4 is moved.

The trolley 17 with a hook suspension (not shown) can be moved along the lower ones of the boom 5 itself by means of a moving mechanism (not shown).

On the trolley 17, on the side of the insert 7, a gripper 18 is mounted to secure the end of the 6 or the end of the insert 7.

A clamping device 19 is mounted on the yoke 4, which is a fixed unit 20 and a movable unit 21 mounted on a bracket 22, forming a tackle with a zigzag on them, a yoke 12 and a screw lanyard consisting of a screw 23 with a nut 24 and an emphasis 25.

For operation of a crane with an upwardly inclined boom, the translation of the boom is carried out as follows.

By means of a moving mechanism (not shown), the sleeve 4 is lowered and locked in the lower position. By turning on the mounting winch 13, the length of the mounting pulley 14 increases. In this case, the head of the boom 5 is lowered to the ground, the spreader 11 rises, and the delay 12 sags. Truck trolley 17 with a mechanism

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movement (not shown) is brought to the eyelets 8 of the boom 5. The end of the insert 7 is fixed in the grip 18 and then disconnected from the eyelet 8. Then the trolley 17 moves to the root of the boom 5 until the end of the insert 7 moves away from the eyelet 8, after which 18 is set aside to allow the bypass of the lug 8 during the reverse movement of the carriage 17 to the head of the boom 5.

When the mounting winch 13 is turned on again, the mounting tackle 14 is weakened. At the same time, the trolley 17 moves to the head of the boom 5, pulls 6 through the insert 7. At the same time, the strut 11 is additionally raised, and the delay 12 additionally sags. Then, the delay 12, through the fixed unit 20, is piled up onto the movable unit 21 and, by rotating the nut 24, tightens up to the stop 25.

When the load trolley 17 is moved to the root of the boom 5, the strut 11 is fixed by the pull 12 (stored on the attachment device) at an angle ensuring that the boom 5 is in an upward sloping position, and the 6 has sagged. The insert 7 is pulled through the grip 18, placed on the frame of the cargo carriage 17 and detached from the rascal 6, the end of which is fixed in the grip 18.

When moving the trolley 17 to the eyelet 8, the end of the rash 6 is tightened, supplied by the gripper 18 to the eyelet 8 and attached to it. Then, the gripper 18 is disconnected from the rascal 6, the trolley 17 moves to the boom root 5, after which the gripper 18 is retracted to the side. By turning the nut 24, the tensioner 19 is loosened, the delay 12 is removed from the movable block 21 and the fixed block 20.

When the mounting winch 13 is turned on, the length of the mounting pulley 14 decreases and the boom 5 is in an upward slant position. In this case, the spacer 11 is lowered to the initial (horizontal) position before the tension of the pull 12.

The translation of the boom 5 into a horizontal position is performed in the reverse order.

The proposed construction of a tower crane for a boom ramp installed on a trolley and a tension device to retract a strut mounted on the holder prompted the to translate the boom of the crane into an upward working position without auxiliary lifting mechanisms, as well as to improve safety and improve labor conditions of installers, since they can perform all the operations on the boom that rests the head on the ground.

At the same time, to lift the strut by an angle, which ensures the transfer of the boom to an upward inclined position, in the proposed crane design a slight force of the mechanism for moving the trolley is required, since the latter with the end of the buckle fixed on it moves downwards

on the inclined boom, and the boom has broken up due to the presence of the equalizing block forms a double pulley lifting of the strut.

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Editor I. Casard Order 2316/25

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Compiled by V. Preobrazhensk

Tehred I. VeresKorrektor M. Pojo

Circulation 799 Subscription

Claims (3)

1. TOWER CRANE containing a clip movable along the tower, bearing an arrow, suspended on a brace stored through the head blocks of the holder, a cargo trolley mounted on the arrow, and a spacer pivotally attached to the clip at one end and connected to the other via a flexible guy its head, characterized in that, in order to increase productivity, it is equipped with a grip for the jib mount mounted on a cargo trolley, and a tension device for pulling the spacers mounted on a clip. 2. The crane on π. 1, characterized in that the gripper for boom calculation is made folding. 3. The crane on π. 1, characterized in that the tensioner is made in the form of a chain hoist with a screw lanyard. FIG. 1