KR100747158B1 - Drop lift - Google Patents

Abstract

A drop lift is provided to easily and safely install and maintain the drop lift by installing a drive unit at a lower portion of the drop lift without moving heavy components to a top portion during an initial installation of the drop lift. A base frame(200), spiral lifts(210), an elevation frame(220), a base plate(230), a pair of motors(240), an electric shaft, a gear box(260), and a branch shaft(251) are provided at a lower portion of a cage connected to a slide guide and lifted along a vertical column. The spiral lifts are installed at four corners of the base frame. The elevation frame is mounted to the upper ends of the spiral lifts. The cage is mounted to the upper surface of the elevation frame. The base plate is mounted to the base frame lengthwise. The motors are mounted to the base plate in opposite directions respectively. The electric shaft transfers the power of the motors to the spiral lift.

Description

Drop lift

1 is a configuration diagram of a conventional drop lift,

2 is a schematic configuration diagram of a drop lift according to the present invention;

3 is a detailed perspective view of the driving device of the drop lift according to the present invention;

4 is a front view of the driving device of the drop lift according to the present invention;

5 is a configuration diagram of a base part of the driving device;

Figure 6 is an enlarged view showing the gearbox side connection structure,

7 is an enlarged view showing the installation structure of the scissors link.

* Description of the symbols for the main parts of the drawings *

10: vertical column, 20: upper frame,

30: sliding guide, 40: cage,

50: conveyor, 200: baseframe,

210: spiral lift, 220: lifting frame,

230: base plate, 240: motor,

250: electric shaft, 251: branch shaft,

252: connecting shaft, 260: gearbox,

270: universal joint, 280: crosslink,

290: Caesar's link.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drop lift, and more particularly, to a drop lift that moves an object part supplied from an outside in an automobile assembly plant to a conveyor installed in a factory.

In the automobile assembly plant, large-size object parts such as crash pads, seats, front-end modules, and front / rear suspension modules are assembled into the car body, and these object parts are manufactured at other production plants and placed in loading docks outside the assembly plant. do.

On the other hand, inside the assembly plant, a conveyor for transferring goods supplied from the outside is installed under the ceiling of the factory building and is connected to each assembly process.

Therefore, a device for lifting and moving the object parts from the truck of the loading dock to the conveyor installed in the upper side of the building is needed. The drop lift serves to perform the role.

In the conventional drop lift, as shown in FIG. 1, four vertical columns 10 are erected between the ground and the upper frame 20, and each sliding guide 30 is provided on the vertical column 10. The cage 40 is connected to these sliding guides 30, and the cage 40 has its own conveyor 50 installed thereon, while the upper frame 20 has a motor 60 and an idle sprocket device ( 70 is provided, the chain 80 over them is made of a configuration that is connected to the sliding guide (30).

And the driving force of the motor 60 is connected to the gearbox 100 for driving the opposite chain 80 by the electric shaft 90, the chain guide 110 to prevent sagging in each chain 80 It is provided.

Therefore, after mounting the components in the cage 40 (or more precisely the conveyor 50) and operating the motor 60, the chain 80 pulls the sliding guide 30 and at the same time the cage 40 rises. When stopped at the target position, the component is moved by using the conveyor 50 to take over the component to a conveyor for transferring parts installed on the ceiling side of the factory. Then, the cage is rotated by the reverse rotation of the motor 60. 40 returns to the ground side home position.

Therefore, it is possible to easily transfer parts from the bottom of the loading dock (or truck loading box) to the conveyor for transporting parts in the assembly plant.

However, the conventional drop lift as described above is a device for driving, that is, the motor 60, the idle sprocket device 70, the chain 80, the electric shaft 90, gearbox 100; Built-in sprockets) are installed on the upper frame 20, which is located at a height of 8 m or more, and it is difficult and dangerous for the worker to directly handle high-load parts, so that the initial installation work and subsequent maintenance are not easy. There was a problem.

Furthermore, the devices for driving are not only located on the upper part of the whole device, but the safety fence 120 for protecting them must be installed on the upper frame 20, so that the structure of the upper part of the device becomes excessively large and the weight also increases. There was a problem of structural instability.

Accordingly, the present invention has been made to solve the above problems, the initial installation work and maintenance, easy to improve the safety of the operator, the structure of the upper structure of the device is simplified and the weight is also reduced structural stability The purpose is to provide a drop lift that can be improved.

The present invention for achieving the above object,

In a drop lift composed of a vertical column fixed upright, an upper frame connecting the vertical columns, sliding guides provided in the vertical columns, and a cage connected to the sliding guides to lift up and down,

A base frame, spiral lifts installed at four corners of the base frame, a lifting frame mounted on top of the spiral lifts, and the cage mounted on its upper surface, and a lengthwise direction to the base frame; And a drive unit including a base plate mounted on the base plate, a pair of motors mounted on the base plate in opposite directions, and an electric shaft, a gear box, and a branch shaft for transmitting power of the respective motors to the spiral lift. Characterized in that installed.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

Figure 2 is a schematic configuration diagram of a drop lift according to the present invention, the present invention is characterized in that the drive device for elevating the cage 40 is installed in the lower portion (A) of the drop lift.

The drop lift according to the present invention is also provided with four vertical columns 10 installed in an upright fixed state, an upper frame 20 for connecting and fixing the upper portions of the vertical columns 10, and the vertical columns 10. Sliding guides 30, the cage 40 is connected to the sliding guides 30 at the same time and comprises a conveyor 50 provided in the cage (40).

As shown in FIGS. 3 and 4, the driving device installed at the lower portion A of the drop lift includes a square base frame 200 fixed to the floor and spirals respectively installed at four corners of the base frame 200. A lift 210, a lifting frame 220 having four corners fixed to the upper ends of the spiral lifts 210 and the cage 40 mounted on an upper surface thereof, and a lengthwise mounting on the upper surface of the base frame 200. Base plate 230, a pair of motors 240 mounted in opposite directions to the base plate 230, and an electric shaft for transmitting the power of the respective motors 240 to the spiral lift 210. It comprises a 250 and the gearbox 260 and the branch shaft 251.

Here, the spiral lift 210 is a known lift device that the rod is raised and lowered by the screw action of the internal structure when the rotational force is input, detailed description thereof will be omitted.

On the other hand, the motor 240 is mounted in opposite directions on both sides of the upper surface of the base plate 230 as described above, the electric shaft 250 connected to the rotation shaft of each motor 240 is the gear box ( 5, the branch shafts 251 are connected to both side directions of the gearbox 260, and the branch shafts 251 are connected to both spiral lifts 210. .

The gearbox 260 includes bevel gears (not shown) installed at the ends of the electric shaft 250 and the branch shaft 251, that is, bevel gears installed at the ends of the electric shaft 250. Bevel gear-type driven gears installed at the ends of both branch shafts 251 in the driving gear of the type are engaged with both sides to transmit power.

Therefore, when the motor 240 is operated, the rotational force of the motor 240 is input to the gearbox 260 along the electric shaft 250, branched from both sides of the gearbox 260 to the branch shaft 251. It is input to each spiral lift 210 via).

Therefore, the spiral lift 210 is operated to push up the lifting frame 220 mounted on the upper end of the lifting frame 220. Since the cage 40 is mounted on the upper surface of the lifting frame 220, the cage 40 is mounted on the cage 40. The parts can be mounted so that the parts can be transferred to the conveyor at the assembly plant located on the upper side.

And, the lowering operation is of course made by the reverse rotation operation of the motor 240.

Meanwhile, both motors 240 are connected to each other by connecting shafts 252, as shown in FIG. 5. That is, the respective connecting shafts 252 are connected to the rear end of the rotating shaft of the motor 240, and they are connected to each other at the center point of the base plate 230. At this time, in order to prevent sagging of the connecting shaft 252, the support 253 may be installed on the base plate 230.

In addition, in the present invention, all the shafts are connected by using the universal joint 260 as shown in FIG. 6 to accommodate the height difference between both ends of the shaft, which is a connecting shaft connecting the motors 240 to each other. The same is true of 252.

As such, by connecting both motors 240 to each other via the connecting shaft 252, the rotation of both motors 240 may be synchronized, so that the four spiral lifts 210 input the same rotational force. Since the lifting operation of the lifting frame 220, that is, the lifting operation of the cage 40 is made stable, the object can be moved more safely.

On the other hand, between the base plate 230 and the lifting frame 220 is provided with a cross link 280 intersecting each other in an X-shape and the center point is connected by a hinge pin.

Guide pins 281 are provided at one end of the cross link 280 and are inserted into guide slots 283 of the guide member 282 fixed to the base plate 230 and the lifting frame 220, respectively. The other end of the cross link 280 is connected by a hinge pin 285 to the fixing brackets 284 mounted to the base plate 230 and the lifting frame 220, respectively.

Therefore, the crosslink 280 is opened and closed according to the lifting operation of the lifting frame 220, and thus the vibration in the front and rear directions (arrow A) during the lift operation is performed without affecting the operation of the drop lift. To make the drop lift more stable.

In addition, a pair of scissor links 290 are installed at both sides of the base plate 230 and the lifting frame 220 (see FIG. 7 simultaneously). These scissor links 290 are configured by connecting the link of the ladder form the hinge (H), these also are folded around the hinge (H) in accordance with the lifting operation of the lifting frame 220 to repeat the operation to be unfolded It is possible to operate the drop lift more stably by suppressing the vibration in the left and right directions (arrow B) during the lift operation without affecting the operation of the drop lift.

As described above, according to the present invention, devices for driving a drop lift, such as a motor, an electric shaft, a branch shaft, and a spiral lift, are installed on the lower side of the drop lift, that is, on the ground side, so There is no need to move to the top and can work on the ground rather than at high places, making installation very easy and safe.

This also has the same effect in terms of maintenance of the drop lift, it is very advantageous in terms of ease of operation and safety by being able to work on the ground during maintenance inspection and repair.

In addition, as the driving devices are installed under the drop lift as described above, the weight of the upper structure is not increased because the weight of the upper part of the drop lift, that is, the upper frame side is not increased, and there is no need to install a safety fence to protect them. As a result, the structural stability of the entire drop lift is improved.

In addition, the present invention includes two driving motors, so that even if one motor fails, it can be operated as another motor. Moreover, both motors are synchronized with each other via an interconnect shaft, so that all spiral lifts have the same phase. Since the rotational force of the drop lift operation is made to be stable and smooth.

In addition, the present invention is provided between the lifting frame and the base plate of the base frame that the cage is mounted, that is, between the fixed portion and the movable portion is provided with a cross link and a scissor link connecting both without disturbing their operation. By suppressing the vibration of the front and rear / left and right there is an effect that the operation of the drop lift is made more stable and smooth. This also helps to extend the endurance life of the drop lift.

Claims (5)

A vertical column 10 fixed upright, an upper frame 20 connecting the vertical columns 10, sliding guides 30 provided in the vertical columns 10, and the sliding guide 30. In the drop lift configured to include a cage 40 connected to the elevating, Under the cage 40, the base frame 200, the spiral lifts 210 installed at the four corners of the base frame 200, and mounted on the top of the spiral lifts 210 and on their upper surface The lifting frame 220 to which the cage 40 is mounted, the base plate 230 mounted in the longitudinal direction to the base frame 200, and a pair of the base plate 230 mounted to the base plate 230 in opposite directions. The motor 240 and the drive unit including the electric shaft 250 and the gear box 260 and the branch shaft 251 for transmitting the power of each motor 240 to the spiral lift 210 is installed Featuring a drop lift. According to claim 1, wherein the motor 240 is connected to the gearbox 260 via the electric shaft 250, the gearbox 260 is the bifurcation shaft 251 using a bevel gear meshing. Branching power, and the branch shaft (251) is connected to the spiral lift (210). The drop lift of claim 1, wherein the rear ends of the rotating shafts of the motors are connected to each other by connecting the connecting shafts. According to claim 1, Between the base plate 230 and the elevating frame 220 is provided with a cross link 280 intersecting each other in an X-shape and the center point is connected to the hinge pin, the cross link 280 of the Guide pins 281 provided at one end portion are inserted into the guide slots 283 of the guide member 282 fixed to the base plate 230 and the lifting frame 220, respectively, and hinges provided at the other ends. Pin 285 is a drop lift, characterized in that connected to the fixed bracket 284 mounted to the base plate 230 and the lifting frame 220, respectively. [Claim 2] The drop of claim 1, wherein a pair of scissor links 290 are formed at both sides of the base plate 230 and the elevating frame 220, respectively. lift.

Images