KR980009092A - Ceiling crane - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane for moving an object, and more particularly to an overhead crane installed on a ceiling in a building to be used for moving an object to a required place. An overhead crane according to the present invention comprises a first drum installed at one end of a girder, a first drum disposed at the other end of the girder, a first drum connected to one end of the trolley, a first drum and a first drum, A second drum installed on one end of the girder and rotatable, a second drum disposed on the trolley, and a second drum disposed on the other side of the girder at one end thereof. The first drum is connected to the other end of the first drum, A second drum connected to the second drum and connected to the hook, and a second rope connected to the second drum at an opposite end thereof to raise and lower the hook when the second drum rotates, and the weight of the girder is reduced This provides the effect of saving energy and materials.

Description

Ceiling crane

FIG. 1 is a view showing a configuration of a conventional overhead crane; FIG.

FIG. 2 is a view showing a configuration of an overhead crane according to the present invention; FIG.

FIG. 3 is a view for explaining the operation of the second drum and the second rope; FIG.

FIG. 4 is a view for explaining the operation of the first drum and the first rope; FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

110: support 112: rail

120: girder 130: trolley

140: first drum 150: first drum

160: first rope 170: second drum

180: Hook 182: Third wheel

190: second rope 192: second drawle

end. Object of the invention

(1) Description of the Prior Art

[TECHNICAL FIELD]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane for moving objects, and more particularly, to an electronic overhead crane installed on a ceiling in a building to move an object to a required place.

BACKGROUND ART [0002]

Generally, a ceiling crane is used in a factory interior where a lot of work is carried out. The ceiling crane consists of a rail installed parallel to the ceiling, a girder running along the rail, a trolley running on the girder, and a hoist for hoisting the object have. Such a ceiling crane must have a trolley drive mechanism for traversing the trolley and a hoist drive mechanism for driving the hoist.

FIG. 1 is a view showing a configuration of a conventional overhead crane. In FIG. 1, a pair of pillars 110 are provided in parallel. Of course, the wall of the building may be used instead of the pillars 110. A rail 112 is provided at the upper end of the support 110 and a girder 120 is mounted on the rail 112. The rail 112 is horizontally disposed in the longitudinal direction of the factory or the like and is movable before and after the girder 120.

On the girder 120, a trolley 130 is mounted so as to be movable laterally. A hoist drum 140 is installed on the trolley 130 and a hoist rope 190 is connected to the hoist drum 140. One end of the hoist rope 190 is fixed to one side of the trolley 130 and the other side is wound around the hoist drum 140.

The hoist rope 190 is provided with a hook 180 through a pulley. That is, the hook 180 is raised or lowered in accordance with the rotation direction of the hoist drum 140.

The trolley 130 is provided with a traverse drive device 193. The transverse drive device 193 is for transversely moving the trolley 130. The transverse drive device 193 is constituted by a general motor, a speed reducer, and the like.

As shown in FIG. 1, in the conventional overhead crane, the hoist drum 140 and the traverse drive unit 193 are mounted on the trolley 130. The hoist drum 140 and the transverse drive unit 193 are very heavy in weight. As a result, the trolley 130 becomes very heavy. When the trolley 130 is heavy, the girder 120 supporting the trolley 130 should have a large cross-sectional area because its rigidity must be increased. That is, the weight of the girder 120 is increased and the capacity of the devices for driving the girder 120 should be increased. As a result, energy consumption also increases.

(2) Technical Problems to be Achieved by the Invention

It is an object of the present invention to provide an overhead crane capable of reducing energy consumption by reducing the weight of a girder and reducing the capacity of a motor or the like required for driving a girder and reducing the cross sectional area of a support or the like required for supporting the girder.

I. Structure and function of the invention

An object of the present invention is to provide an overhead crane mounted on a girder installed to be able to move forward and backward along a rail disposed at a predetermined height, a trolley mounted on the girder to allow lateral movement, and a hook for lifting a predetermined object, A first drum installed at one end of the girder, a first drum disposed at the other end of the girder, a first drum connected to one end of the trolley, an opposite end connected to the other side of the trolley through the first drum and the first drum, A second drum installed on one side of the girder and rotatable; a second drum disposed on the trolley; one end connected to the other end of the girder; and a second drum and hooks And a second rope connected to the second drum via the third drum and connected to the second drum to raise and lower the hook when the second drum rotates. Which can be achieved by an overhead crane.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a view showing the construction of an overhead crane according to the present invention. In FIG. 2, a pair of pillars 110 are provided in parallel. Of course, the wall of the building may be used instead of the pillars 110. A rail 112 is provided at the upper end of the support 110 and a girder 120 is mounted on the rail 112. The rail 112 is horizontally disposed in the longitudinal direction of the factory or the like and guides horizontal movement of the girder 120 in the forward and backward directions. That is, the girder 120 is movable forward and backward along the rail 112. On the girder 120, a trolley 130 is mounted so as to be movable laterally.

At one end of the girder 120, a first drum 140 is rotatably installed. The first drum 140 is for driving the trolley 130. A first drum 150 is installed at the other end of the girder 120 facing the first drum 140. The first drum 140 and the first pulley 150 are connected to the first rope 160. The first rope 160 has one end connected to one side of the trolley 130 and the other end connected to the other side of the trolley 130. The first rope 160 traverses the trolley 130 when the first drum 140 rotates. The first rope 160 may be a wire rope.

A second drum 170 is installed at an end of the girder 120 opposite to the first drum 140. The second drum 170 is for lifting the hook 180 up and down. The second drum 170 is connected to the second rope 190. The second rope 190 passes through a pair of second pulleys 192 provided on the trolleys 130 and a third pulley 182 provided on the hooks 180, As shown in FIG. That is, when the second drum 170 rotates, the second rope 190 moves the hook 180 up and down.

FIG. 3 is a view for explaining the operation of the second drum and the second rope; FIG. In FIG. 3, when the second drum 170 is rotated clockwise, the second rope 190 is wound on the outer circumferential surface of the second drum 170. The second rope 190 is pulled to the right and the hook 180 hanging on the second rope 190 through the third pulley 182 is raised. Conversely, when the second drum 170 is rotated counterclockwise, the second rope 190 is released from the second drum 170, and the hook 180 is lowered due to its own weight. That is, the hook 180 can be lifted and lowered by the second drum 170 as required.

FIG. 4 is a view for explaining the operation of the first drum and the first rope; FIG. 4, when the first drum 140 is driven to rotate clockwise, the first rope 160 coming from the first drum 150 is wound on the first drum 140, while the first drum 140 is wound on the trolley 130, 1 rope 160 is released. Accordingly, the trolley 130 receives the rightward force and moves toward the first pulley 150. Conversely, when the first drum 140 is rotated counterclockwise, the first rope 160 on the trolley 130 side is wound on the first drum 140 and the first rope 160 is wound on the first drum 150 ) Is released. Thus, the trolley 130 receives a force toward the first drum 140 and moves to the left. That is, the trolley 130 can be traversed by driving the first drum 140.

All. Effects of the Invention

In the overhead crane according to the present invention as described above with reference to FIGS. 2 to 4, the second drum for lifting and lowering the hook and the first drum for moving the trolley are mounted on both ends of the girder, The weight is much lighter than the conventional one. If the trolley is lighter, the girder supporting the trolley may be made of a member having a smaller cross-sectional area than the conventional one because the rigidity thereof may be reduced. That is, when the weight of the girders is reduced, the capacity of the devices for driving the girders may be small. As a result, energy consumption is reduced.

Claims (3)

An overhead crane mounted on a girder installed to be able to move back and forth along a rail disposed at a predetermined height, a trolley mounted on the girder and capable of lateral movement, and a hook connected to the trolley for lifting a predetermined object, A first drum rotatably installed at one end; A first pulley installed at the other end of the girder; A first rope connected to one end of the trolley and connected to the other end of the trolley through the first drum and the first drum in turn so that the first drum rotates when the first drum rotates; A second drum installed at one end of the girder and rotatable; A second pulley installed on the trolley; A second drum connected to one end of the girder at one end thereof, a third drum connected to the second drum and the hook, an opposite end connected to the second drum, and a second rope Wherein the crane comprises a crane. The overhead crane according to claim 1, wherein the second pulleys are provided at a predetermined interval. The overhead crane according to claim 1, wherein the first drum and the second drum are installed facing each other at both ends of the girder. ※ Note: It is disclosed by the contents of the first application.