KR200301286Y1 - Cargo shake prevention device - Google Patents

Abstract

It is possible to reduce the weight, simplify the simplification and to absorb the impact of shaking, and to effectively prevent the shaking of the cargo, and to connect with the pair of the first link and the first link that can be rotated on the cargo dismounting outlet. And a pair of second links having a circular gear which is formed at one end and disposed to face each other at predetermined intervals, and a circular gear for applying a force to rotate the circular gears mounted on and opposite to the trolley in opposite directions to each other. The invention relates to a cargo shake preventing device comprising a driving means.

Description

Anti-shake device

The present invention relates to a cargo shake prevention device, and in particular, to prevent cargo shake of a crane that can adjust the unloading position and to prevent the shaking of unloading during automatic operation of a yard crane, a container loading cargo crane, a general factory overhead crane, etc. Relates to a device.

In general, cranes are frequently used for heavy load transport and unloading. There are various types of cranes, such as gantry cranes, jib cranes, and overhead cranes, depending on the application. The present invention can be applied to all these cranes, but is particularly effective for gantry cranes which are widely used for loading and unloading containers.

The gantry crane has a configuration that includes a gantry (gantry) running along the rail, a trolley mounted on the gantry and traversed, and a spreader installed in the trolley. Spreaders are attached to and detached from the container as needed and are usually suspended through a wire rope installed in a trolley. That is, by adjusting the length of the wire rope, the spreader can be moved up and down and the required height of the spreader can be maintained.

As described above, the spreader hangs on the wire rope, causing it to sway when the gantry travels or when the trolley traverses. As a result, it takes a long time to load or unload a container in the correct position.

1 is a schematic perspective view of a typical gantry crane, and FIG. 2 is a perspective view of an improved gantry crane. The gantry 10 is shown in FIGS. 1 and 2. The gantry 10 is installed to be able to travel straight along the rail 12. The transverse movement is provided along the girders 13 on the gantry 10. The height is determined by adjusting the length of the wire rope 16 between this trolley 14 and the spreader 18.

In the gantry crane as shown in FIG. 1, the spreader simply hangs on the wire rope 16, causing it to shake when the gantry 10 travels or the trolley 14 traverses. Accordingly, it takes a long time to load or unload the container 20 in the correct position.

In order to solve this problem, as shown in FIG. 2, the upper link 22 and the lower link 24 are installed between the spreader 18 and the trolley 14 to restrain the shaking of the spreader 18. As the link structure increases and the weight increases, the capacity of the motor as the driving source must also increase.

Techniques for controlling the shake of the spreader that are commonly applied are largely divided into manual, hydraulic, electric, purge, feedback, double trolley. The manual type is a method of controlling the spreader shake by operating the trolley or the like to counteract the spreader shake, which requires the skill of the driver and does not control the slight shake of the spreader. . The hydraulic type is to control the shaking of the spreader by sensing the tension change of the wire rope on which the spreader is suspended, which also has the disadvantage of not actively coping with the small shaking of the spreader. In addition, the electric type detects the shaking of the spreader or the container and moves the trolley relative to the shaking to control it, which does not respond to the micro displacement and does not reach the target point accurately. It does not catch and feedback and dual trolleys are still in development.

An object of the present invention is to provide a cargo shake prevention device that can achieve light weight, simplification and can not only absorb the impact of shaking, but also effectively prevent the shaking of the cargo.

1 is a perspective view schematically showing a typical gantry crane,

2 is a perspective view of an improved gantry crane,

3 is a view showing an embodiment of a cargo shake prevention device according to the present invention,

4 is a view showing another embodiment of the anti-shake device according to the present invention,

5 is a view showing another embodiment of the cargo shake prevention apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

14: trolley 16: wire rope

18: spreader 100: cargo shake prevention device

111, 112: first link 113, 114: second link

115, 116: circular gear 120: circular gear drive means

121: rack 122: bearing

123: tooth 124: heavy

125: cylinder mechanism 126: linear sensor

127: worm 128: worm member

129: motor

An object of the present invention is installed on a trolley and a trolley installed horizontally movable along a predetermined path and mounted on a crane equipped with a cargo disengagement that can catch or release cargo as needed, and the shaking of cargo mounted on the cargo disengagement In the cargo shake prevention device for preventing the, comprising a circular gear drive means for applying a force to rotate in a direction opposite to each other circular gears arranged facing each other at a predetermined interval rotatably installed on the cargo outlet Achievable by the cargo shake prevention device characterized in that.

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

3 is a view showing an embodiment of a cargo shake prevention device according to the present invention. In FIG. 1 a spreader 18 is shown. This spreader 18 is a kind of cargo mounting port and is intended to be able to attach and detach a container mainly in a cantree crane. The spreader 18 is a part which is connected to the trolley through the wire rope 16 and is lifted according to the degree of winding of the wire rope 16.

As shown, the cargo shake prevention apparatus 100 according to the present invention includes a pair of first links 111 and 112 rotatably installed on the cargo mounting hole, that is, the spreader 18. In the case of using the other cargo mounting and discharging outlet instead of the spreader 18, the pair of first links 11 and 112 may be installed on the cargo mounting opening.

Second links 113 and 114 are connected to ends of the first links 111 and 112, respectively. The second links 113 and 114 are rotatably connected to the first links 11 and 112. At one end of the two links 113 and 114, circular gears 115 and 116 are provided, respectively. These two circular gears 115 and 116 are arranged to face each other at a predetermined interval. These circular gears 115 and 116 are called pinions.

Cargo shake prevention device 100 according to the present invention is provided with a circular gear drive means (120). In FIG. 3, the circular gear driving means 120 has a rack 121 installed to be able to move up and down between two opposing circular gears 115 and 116. The rack 121 is supported by a bearing 122 installed in a trolley or the like. In the rack 121, teeth 123, which are respectively bitten by the two circular gears 115 and 116, are formed along both sides. The heavy object 124 is attached to the upper end of the rack 121.

When the entire crane or the trolley runs, stops, or stops in FIG. 3, the spreader 18 is subjected to a force to shake in a predetermined direction in proportion to the magnitude of the stopping speed or the like. This force acts as a force to rotate the first link 111, 112 provided on the spreader 18 and the second link 113, 114 connected to the first link 111, 112 in a predetermined direction.

When the spreader 18 receives a force in the direction of the arrow, the first links 111 and 112 receive a force to rotate in a counterclockwise direction with respect to the connection point with the second links 113 and 114, and the second link 113, 114 is a circular gear 115 formed on the upper end of the force to raise the rack 121, the circular gear 116 on the right side to apply a force to lower the rack 121.

That is, only when the spreader 18 tries to shake with the force in the direction of the arrow, the rack 121 remains stationary. Accordingly, the rotation of the pair of second links 113 and 114 is prevented, and the rotation of the pair of first links 111 and 112 is also prevented. This also suppresses the shaking of the spreader 18. In addition, the rack 121 and the circular gears (115, 116) may provide an effect of absorbing the impact force due to the sudden shaking of the spreader 18 and the cargo.

On the other hand, in the third state the rack 121 and the heavy object 124 is forced downward by gravity. Accordingly, the left circular gear 115 always receives a rotational force in a clockwise direction, the right circular gear 116 always receives a force in a counterclockwise direction. This acts as a force to raise the spreader 18. That is, the gravity of the rack 121 and the weight 124 acts as a power to raise the spreader 18 in a state in which the container or the like is mounted on the spreader 18 to reduce the hoisting power.

On the contrary, the lowering of the spreader 18 is caused by the weight of the spreader 18 and the cargo. At this time, the first links 111 and 112 and the second links 113 and 114 are different from each other when the spreader 18 is raised. Rotate in opposite directions, respectively. Accordingly, the rack 121 and the weight 124 is raised due to the rotation of the circular gears (115, 116), the reaction force acts as a force to prevent the spreader 18 and the cargo suddenly fall. That is, the gravity of the rack 121 and the weight 124 serves to mitigate the impact force generated when the spreader 18 is lowered and stopped at a predetermined height.

4 is a view showing another embodiment of the cargo shake prevention apparatus according to the present invention. 4, spreader 18 is shown. This spreader 18 is a portion that can be lifted and mounted on the trolley through the woofer 16 with a wire. A pair of first links 111 and 112 are provided on the spreader 18 so as to rotate in place, and second links 113 and 114 are rotatably connected to the ends of the first links 111 and 112. It is. Circular gears 115 and 116 are respectively provided on the upper ends of the second links 113 and 114, and a rack 121 having teeth 123 formed on both surfaces between the two circular gears 115 and 116, respectively. The bearing 122 is supported so as to be able to move up and down. Since the above configuration is the same as in the third embodiment, detailed description thereof will be omitted, and only the parts having different configurations will be described.

As shown in FIG. 4, the circular gear drive means 120 is comprised of the rack 121, the cylinder mechanism 125, and the linear sensor 126. As shown in FIG. The cylinder mechanism 125 is for raising and lowering the rack 121 as needed, and the linear sensor 126 is for making fine adjustment of the height of the spreader 18 by sensing the operation degree of the cylinder mechanism 125. will be. In this case, the cylinder mechanism 125 serves to absorb the impact force generated when the spreader 18 stops descending.

In FIG. 4, the rack 121 is intended to obtain the effect described in FIG. 3 by elevating the rack 121 as needed using the cylinder mechanism 125 instead of the weight 124 of the third embodiment. The operations of the circular gears 115 and 116 and the first and second links 111, 11, 113 and 114 according to the operation of FIG. 3 are the same as in the third embodiment.

5 is a view showing another embodiment of the cargo shake prevention device according to the present invention. 5, spreader 18 is shown. This spreader 18 is a portion that can be lifted and mounted on the trolley through the wire rope 16. This spreader 18 is a portion that can be lifted and mounted on the trolley through the wire rope 16. On this spreader 18, a pair of first links 11 and 112 are connected so as to be mutually rotatable in place. Circular gears 115 and 116 are provided at the upper ends of the second links 113 and 114, respectively. Worm wheels are suitable for the circular gears 115 and 116. Since the above configuration is almost the same as in the third embodiment, detailed description thereof will be omitted, and only the portions having different configurations will be described.

As shown in FIG. 5, the circular gear driving means 120 is supported by a bearing 122 installed on a trolley and the like, so that it can be rotated in place and a worm member 128 and a worm member having a worm 127 formed on an outer circumferential surface thereof. It consists of a motor 129 and a linear sensor 126 for rotating 128 in the required direction. The motor 129 is for rotating the worm member 128 in the required direction, if necessary, the linear sensor 126 to finely adjust the height of the spreader 18 by detecting the degree of operation of the motor 129. It is to.

The fifth embodiment uses the worm member 128 instead of the rack 121 of the third embodiment, and rotates the worm member 128 as necessary by using the motor 129 instead of the heavy object 124. In order to achieve the effect described in FIG. 3, the operation of the circular gears 115 and 116 and the first and second links 11, 112, 113, and 114 according to the rotation of the worm member 128 is performed in FIG. Same as in

As can be seen from the above description, the cargo shake prevention device according to the present invention makes it possible to reduce the link structure, and to prevent the spread of the spreader and the cargo, as well as to reduce the impact on the wire rope. .

Claims (3)

It is installed on a crane equipped with a trolley installed horizontally movable along a predetermined path and a cargo detachment outlet installed on the trolley and capable of holding or releasing cargo as needed to prevent shaking of cargo mounted at the cargo detachment outlet. In the cargo shake prevention device for giving, A pair of first links installed on an upper portion of the cargo detachable outlet to be rotatable; A pair of second links connected to the first link so as to be rotatable and disposed at one end and facing each other at predetermined intervals, the second links having a circular gear at the other end; The gears mounted on the trolley are provided to be lifted along the two circular gears in order to apply a force to rotate the circular gears facing each other in opposite directions, and teeth each biting the two circular gears are formed along both sides. And a circular gear driving means having a rack and a weight attached to the rack. The rack according to claim 1, wherein the circular gear driving means is provided so as to be movable up and down between the two circular gears facing each other, and the racks having teeth formed on both sides of the two circular gears respectively are formed along both sides thereof, and the rack as necessary. Cargo shake prevention device comprising a cylinder mechanism for lifting up and down. The worm member according to claim 1, wherein the worm member is rotatably installed between the two circular gears facing the circular gear driving means, and a worm bitten by the two circular gears is formed on an outer circumferential surface thereof. Cargo shake prevention device comprising a motor.