KR20230147881A - Turntable anti-rotation device of cargo crane - Google Patents

Abstract

Provided is a turntable rotation preventing apparatus of a cargo crane. According to the present invention, while an operator is sitting in a cockpit of a crane, positions of a through hole and a fixation container are recognized through a sensor installed at a turntable. Therefore, a safety pin to prevent the turntable from rotating is conveniently and accurately inserted and the turntable is fixed. As a result, an accident in which a crane work is not performed or a boom operates arbitrarily during movement can be prevented. The turntable rotation preventing apparatus of the cargo crane of the present invention comprises: the turntable; a base plate; and a safety device.

Description

Turntable anti-rotation device of cargo crane {Turntable anti-rotation device of cargo crane}

The present invention relates to a turntable rotation prevention device for a cargo crane, and more specifically, to prevent a safety accident in which the boom rotates arbitrarily when the crane is not in operation, the turntable can be conveniently fixed while sitting in the cockpit of the crane. This relates to a turntable rotation prevention device for cargo cranes.

A cargo crane is installed at the rear of a truck and moves with the vehicle. It is equipment that allows loading or unloading goods into a loading box using a crane installed on a truck at a work site without separate crane equipment. Cargo crane cranes have overlapping booms that can be expanded and rotated, allowing them to unload cargo at work sites that are lower than the ground, such as high places or underground. Typically, cargo cranes have a boom fixed to a crane column so that it can rotate, and a cabin (control seat) for workers to board is provided. The crane column rotates with the rotation of the turntable while workers board the cabin and view the entire work site. It is possible to move and unload cargo by expanding and adjusting the boom.

The operation of rotating and expanding the cargo crane's boom is operated by hydraulic pressure, and the boom should not operate arbitrarily when the crane is not working or the cargo crane is moving. This may cause malfunction in the hydraulic system or damage to hydraulic hoses, etc. When the crane is not properly controlled, the operator must manually insert safety pins into the through hole and the fixing tube to prevent the turntable from moving after aligning the positions of the through hole formed in the ten table and the fixing tube installed on the base plate where the turntable driving part is fixed. It is being fixed.

However, it is difficult for the operator who sits in the cockpit and operates the crane to come down from the cockpit to the turntable (usually more than 2m) to insert a safety pin, and it is also not easy to rotate the turntable to accurately match the positions of the through hole and the fixed barrel, so the crane operator is usually The reality is that the operator goes up and down the cockpit several times to align the positions of the through hole and the fixing tube, and then inserts a safety pin. In this way, it is cumbersome to go up and down the cockpit several times, so there is a problem that safety accidents caused by moving the cargo crane or standing the crane without inserting a safety pin or fixing the turntable and the boom rotating or moving arbitrarily occur frequently. .

In relation to cargo cranes, many technologies have emerged, such as Utility Model Registration No. 284748 "Crane Cabin", Publication Patent No. 2022-22923 "Crane Vehicle", Patent Registration No. 1946142 "Cargo Crane", etc., but the cargo that has appeared so far is In order to prevent the turntable from rotating, the crane is fixed by manually inserting a safety pin after aligning the position of the through hole formed in the tentable with the fixing barrel installed on the base plate where the turntable driving part is fixed. There is a problem that the crane still has the problems pointed out earlier. .

The present invention was developed to solve the above problems, and the purpose of the present invention is to prevent the turntable from rotating by recognizing the positions of the through hole and the fixing tube through a detection sensor installed on the turntable while the operator is sitting in the cockpit of the crane. The purpose is to provide a turntable rotation prevention device for a cargo crane, which can prevent safety accidents in which the boom operates arbitrarily while the crane is not in operation or is in motion by conveniently and accurately inserting a safety pin to secure the turntable.

The turntable rotation prevention device for a cargo crane according to the present invention includes a turntable in which a crane column is fixedly installed on an upper part of a plate-shaped member and a through hole is formed at an edge of the plate-shaped member; A base plate located below the turntable, on which a turntable driving unit is fixedly installed on the upper surface of the plate-shaped member, and a cylindrical fixing cylinder with an open top installed on an edge of the plate-shaped member; It is provided with a cylindrical safety pin, is installed on the upper surface of the turntable around the through hole, and includes a safety device that prevents rotation of the turntable as the safety pin penetrates the through hole and is inserted into the fixing cylinder installed on the base plate. It is characterized by

Preferably, first and second detection sensors are installed at the edges of the turntable and the turntable driving unit, respectively, and the first and second detection sensors detect whether the positions of the through hole and the fixing tube are aligned and use the safety pin of the safety device. Insert.

Preferably, the safety device includes a cylindrical safety pin; The lower end of the piston rod is coupled to the upper part of the safety pin, so that the piston rod moves up and down to raise and lower the safety pin, and an electric cylinder in which magnets are installed at the upper and lower ends of the piston rod, respectively; a motor that drives the electric cylinder; Forward and backward detection sensors installed on the outer peripheral surfaces of the upper and lower ends of the electric cylinder, respectively, detect the positions of the magnets installed on the upper and lower ends of the piston rod; It is comprised of a gearbox equipped with a reducer that reduces the rotation of the motor and transmits it to the electric cylinder, and the components constituting the safety device are accommodated inside the case, and a fixing plate fixed to the upper surface of the turntable around the through hole. forms the bottom of the case.

Preferably, a controller is installed inside the cabin of the cargo crane, and as the safety pin of the safety device is raised and lowered by operation of the controller, the safety pin penetrates the through hole and is inserted into or separated from the fixing cylinder installed on the base plate.

Preferably, the controller is provided with a lighting lamp that turns on when the position of the through hole formed in the turntable matches the position of the fixing cylinder installed in the base plate, and a switch that controls the lifting and lowering operation of the safety pin.

Preferably, corresponding magnets are installed on the lower part of the turntable and the upper part of the turntable driving unit, so that the positions of the through hole and the fixing tube are aligned to prevent the turntable from rotating when the switch is operated to lower the safety pin.

The turntable rotation prevention device for a cargo crane according to the present invention installs an optical sensor or proximity sensor on the turntable, even if the worker sitting in the cockpit does not go down to the turntable and check it with his own eyes, so that the through hole formed in the turntable and the fixing tube installed in the base plate are installed. It is possible to recognize whether the position of It is possible to fundamentally prevent safety accidents in which the boom operates arbitrarily while the crane is not working or is in motion.

Figure 1 is a diagram schematically showing a cargo crane equipped with a safety device according to the present invention.
Figure 2 is a diagram showing the configuration and installation location of the safety device and controller.
Figure 3 is a diagram showing the operating state of the safety pin of the safety device.
Figure 4 is a diagram showing the configuration and installation location of the safety device and detection sensor.

The technical feature of the turntable rotation prevention device for a cargo crane according to the present invention is to secure the turntable by conveniently and accurately inserting a safety pin to prevent the turntable from rotating while the operator is sitting in the cockpit of the crane, thereby preventing the boom from moving or while the crane is not working. It is possible to fundamentally prevent safety accidents caused by arbitrary operation.

The cargo crane 10 has a crane column 11 installed on the top of the turntable 131, a crane boom 12 is installed on the top of the crane column 11, and a crane is installed on the side of the crane column 11. A cabin 20 equipped with a cockpit for adjustment is installed, and the general structure is to adjust the angle of the boom 12 by operating the boom cylinder 121.

The turntable rotation prevention device for a cargo crane according to the present invention prevents the turntable 131 from rotating arbitrarily by inserting a turntable 131 that rotates the crane, a base plate 133 on which the turntable driving unit 132 is installed, and a safety pin 32. A safety device (30) to prevent this is provided as a basic configuration.

The turntable 131 is formed of a plate-shaped member, and the turntable driving unit 132 located at the bottom of the plate-shaped member is provided with a bearing so that the turntable 131 can rotate, and a bearing is provided at the top of the plate-shaped member. The crane column 11 is fixedly installed, and a through hole 135 for inserting a safety pin 32 is formed at the edge of the plate (see FIGS. 2 and 4).

The base plate 133 is located at the lower part of the turntable 131, the turntable driving unit 132 is fixedly installed on the upper surface of the plate-shaped member, and a cylindrical fixing tube 134 with an open top is installed on the edge of the plate. A safety pin 32 passing through the through hole 135 is inserted into the fixing tube 134, and the base plate 133 and the turntable driving unit 132 are fixed without rotating (see Figures 2 and 4).

The safety device 30 is a device to prevent the boom 12 from rotating arbitrarily while the crane is not working or is moving. It is provided with a cylindrical safety pin 32 and is located around the through hole 135 formed in the turntable. It is installed on the upper surface of the turntable 131, and when the safety pin 32 penetrates the hole 135 and is inserted into the fixing tube 134 installed on the base plate, the turntable 131 is fixed to the base plate 133. As it is fixed, rotation of the turntable 131 is prevented.

The safety device 30 includes a cylindrical safety pin 32, an electric cylinder 33 that operates the safety pin 32, a motor 34 and a gearbox 35 that operate the electric cylinder 33. It is provided in various configurations, and all components are accommodated inside the case 31 (see Figures 2 and 3).

In the electric cylinder (33), the lower end of the piston rod is coupled to the upper part of the safety pin (32), so that the piston rod moves up and down to raise and lower the safety pin (32), and the upper and lower ends of the piston rod are magnetic. These are respectively installed, and the electric cylinder 33 is driven by the motor 34 installed on the side of the cylinder, and the gearbox 35 is equipped with a reducer that reduces the rotation of the motor 34 and transmits it to the electric cylinder 33. ) is provided and configured.

Forward and backward detection sensors (36) are installed on the outer peripheral surfaces of the upper and lower parts of the electric cylinder (33). When the piston rod moves up and down, the positions of the magnets installed at the upper and lower parts of the piston rod are monitored by the forward and backward detection sensors (36). By detecting and recognizing the forward or backward position of the piston rod, the rising and falling positions of the safety pin 32 coupled to the bottom of the piston rod are recognized, and by detecting the position of the safety pin 32 in this way, the safety pin 32 ) is determined whether it is accurately and completely inserted into the fixation tube 134.

All components constituting the safety device 30 are accommodated inside the case 31, and a plate-shaped fixing plate 311 fixed to the upper surface of the turntable 131 around the through hole 135 is attached to the case 31. It forms the lower surface, and the upper part of the gearbox 35 is fixed to the upper inner peripheral surface of the case 31 by a bracket (reference symbol not specified). Of course, the fixing plate 311 must also have a hole through which the safety pin 32 passes (see Figure 3).

A controller 38 is installed to lift and lower the safety pin 32. The controller 38 is installed inside the cabin 20 of the cargo crane, so that the crane operator operates the controller 38 while sitting in the cockpit. The safety pin (32) of the safety device is raised and lowered so that the safety pin (32) passes through the hole and through hole (135) in the fixing plate (311) and is inserted into or separated from the fixing tube (134) installed on the base plate. By doing so, the turntable 131 can be rotated or prevented from rotating arbitrarily.

The controller 38 includes a lighting lamp 381 that lights up when the positions of the through hole 135 formed in the turntable and the fixing tube 134 installed on the base plate match, and to control the lifting operation of the safety pin 32. A switch 382 to operate is provided. The lighting lamp 381 may also be used as a buzzer to provide an audible notification. In addition, the switch 382 can be used as a bar-shaped toggle switch to control the raising or lowering of the safety pin 32 by moving it up and down, and a rising button and a lowering button are installed to control the raising or lowering of the safety pin 32. Alternatively, the descent can be controlled, and such changes can be made by a person skilled in the art without any technical difficulties.

When the crane work is completed and no work is being done, the turntable 131 is rotated and the lighting lamp 381 lights up to indicate that the positions of the through hole 135 and the fixing tube 134 match, and then the switch 382 is operated. When the safety pin 32 is lowered and inserted into the through hole 135 and the fixing tube 134, the turntable 131 is fixed. When starting crane work again, operate the switch 382 to raise the safety pin 32 and take the safety pin 32 out of the through hole 135 and the fixing tube 134, so that the turntable 131 can rotate and the crane You will be able to work.

It is preferable that three lighting lamps 381 are provided. The first lamp is a lamp that lights up when the positions of the through hole 135 and the fixing tube 134 match, and the second lamp is a safety pin (32) when the safety pin 32 is inserted into the through hole 135 and the fixing tube 134. 32) is a lamp that lights up when it is safely and accurately inserted to the end of the fixing tube (134), and the third lamp is when the safety pin (32) is taken out of the through hole (135) and the fixing tube (134). This is a lamp that lights up when it is completely taken out of the through hole (134) and through hole (135). Whether the safety pin 32 is correctly inserted or removed from the through hole 135 and the fixing tube 134 is determined by the forward and backward detection sensor 36 installed on the outer peripheral surface of the upper and lower parts of the electric cylinder 33 and the upper and lower parts of the piston rod. It is recognized by detecting the position of the magnet installed at the bottom.

A position detection unit 37 is installed at a certain position on the side of the turntable 131 and the turntable driving unit 132 to detect the position where the through hole 135 and the hole of the fixing tube 134 coincide. The position detection unit ( 37) consists of a first detection sensor 371 installed on the turntable 131 and a second detection sensor 372 installed on the turntable driving unit 132, and the first and second detection sensors 371 and 372 Accordingly, it is determined whether the hole positions of the through hole 135 and the fixing tube 134 match, and the safety pin 32 of the safety device is inserted. An optical sensor or a proximity sensor can be used as a detection sensor (see Figure 4).

In addition, corresponding magnets are installed at the lower part of the turntable 131 and the upper part of the turntable driving unit 132, so that the position of the turntable 131 can be fixed by magnetic force, so that the through hole 135 and the high After the position of the orthodox 134 is aligned, when the switch 382 is operated to lower the safety pin 32, rotation of the turntable 131 is prevented. The installation positions of the first and second detection sensors 371 and 372 and the magnet can be changed at any time.

The above description is an illustrative description of the present invention, and the embodiments published in the specification are not intended to limit the technical idea of the present invention, but are for illustrative purposes, so those skilled in the art Various modifications and variations will be possible without departing from the technical idea of . Therefore, the scope of protection of the present invention should be interpreted based on the matters stated in the claims, and technical matters within the equivalent scope thereof should also be interpreted as being included in the scope of rights of the present invention.

10: cargo crane 11: crane column
12: Boom 121: Boom cylinder
13: Crane rotating part 131: Turntable
132: Turntable driving unit 133: Base plate
134: fixing tube 135: through hole
20: Cabin
30: Safety device 31: Case
311: fixing plate 32: safety pin
33: electric cylinder 34: motor
35: Gearbox 36: Forward and backward detection sensor
37: Position detection unit 371: First detection sensor
372: Second detection sensor 38: Controller
381: lighting lamp 382: switch

Claims (6)

A turntable in which a crane column is fixedly installed on the top of a plate-shaped member and a through hole is formed at the edge of the plate-shaped member;
A base plate located below the turntable, on which a turntable driving unit is fixedly installed on the upper surface of the plate-shaped member, and a cylindrical fixing cylinder with an open top installed on an edge of the plate-shaped member;
A safety device having a cylindrical safety pin, installed on the upper surface of the turntable around the through hole, and preventing rotation of the turntable as the safety pin penetrates the through hole and is inserted into a fixing cylinder installed on the base plate;
A turntable rotation prevention device for a cargo crane, characterized in that it comprises a.
According to paragraph 1,
First and second detection sensors are installed at the edges of the turntable and the turntable driving unit, respectively, and the first and second detection sensors detect whether the positions of the through hole and the fixing tube are aligned to insert the safety pin of the safety device. Features a turntable rotation prevention device for cargo cranes.
The method of claim 1 or 2, wherein the safety device is:
Cylindrical safety pin;
The lower end of the piston rod is coupled to the upper part of the safety pin, so that the piston rod moves up and down to raise and lower the safety pin, and an electric cylinder in which magnets are installed at the upper and lower ends of the piston rod, respectively;
a motor that drives the electric cylinder;
Forward and backward detection sensors installed on the outer peripheral surfaces of the upper and lower ends of the electric cylinder, respectively, detect the positions of the magnets installed on the upper and lower ends of the piston rod;
A gearbox equipped with a reducer that reduces the rotation of the motor and transmits it to the electric cylinder;
A turntable rotation prevention device for a cargo crane, characterized in that the components constituting the safety device are accommodated inside the case, and the fixing plate fixed to the upper surface of the turntable around the through hole forms the lower surface of the case. .
According to paragraph 3,
A controller is installed inside the cabin of the cargo crane, and by manipulating the controller, the safety pin of the safety device is raised and lowered, and the safety pin penetrates the through hole and is inserted into or separated from the fixture installed on the base plate. Crane turntable rotation prevention device.
According to clause 4,
The controller is equipped with a lighting lamp that turns on when the position of the through hole formed in the turntable matches the position of the fixing cylinder installed in the base plate, and a switch that controls the lifting and lowering operation of the safety pin. Rotation of the turntable of the cargo crane. prevention device.
According to clause 5,
Cargo, characterized in that the rotation of the turntable is prevented when the safety pin is lowered by operating the switch by matching the positions of the through hole and the fixing tube so that corresponding magnets are installed on the lower part of the turntable and the upper part of the turntable driving unit. Crane turntable rotation prevention device.

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