JPH0328004Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for moving a transport vehicle from a rail fixed to a shelf to a rail of an elevating device, or from a rail of an elevating device to a rail fixed to a shelf. This invention relates to a rail position correction device that allows smooth transfer.

[Prior Art] In order to handle small rectangular parallelepiped items such as plastic buckets and carton cases, warehouse equipment such as stacker crane type or multi-carousel type has conventionally been used.
A crane with a dead weight of several tons is required to handle a load of less than 1 kg, the drive device becomes larger and the power consumption increases, the building must be strengthened for the heavy crane, and the handling capacity There are problems such as there is a limit to the increase in storage capacity, and there is a limit to the reduction in the cycle time for loading and unloading, and in the case of the latter, it is necessary to use multiple levels of rotating shelves to load and unload the desired cargo. There were problems such as the need to rotate one stage in its entirety toward the transfer device, which required a large amount of power, and the need for a separate moving device and control device for each stage.

Therefore, in order to solve the above-mentioned problems that conventional warehouse equipment has, a transport vehicle that can carry loads and travel is raised and lowered by a lifting device placed at one end of the aisle between shelves, and the upper or lower shelf A warehouse facility is being considered in which warehouses can be loaded and unloaded by transferring to rails.

[Problems to be solved by the invention] However, in warehouse equipment in which the transport vehicle is transferred to the upper or lower rail using a lifting device, it is difficult for the transport vehicle to move from the rail on the shelf side to the rail of the elevator device. When transferring or transferring from the rail of the lifting device to the rail on the shelf side, there is a problem that if there is a step difference between the rail on the shelf side and the rail of the lifting device, the transfer of the carrier cannot be performed smoothly.

The present invention was developed in view of the above-mentioned circumstances, with the purpose of enabling a conveyance cart to be smoothly transferred between the rails on the shelf side and the rails of the lifting device.

[Means for Solving the Problems] The present invention provides a lifting platform that can be raised and lowered, with a substantially central portion in the longitudinal direction of the upper link extending in a direction parallel to the traveling direction of the transporting vehicle being moved in a direction parallel to the traveling direction of the transporting vehicle. The upper link is pivotally supported via an elastic body so as to be movable and rotatable with respect to a vertical plane parallel to the traveling direction of the transport vehicle, and extends downwardly in the longitudinal direction of the upper link and parallel to the travel direction of the transport vehicle. A link capable of swinging in a direction is pivotally connected, a lower horizontal member is pivotally connected to the lower end of the link in parallel with the upper link, and a parallelogram link mechanism is formed by the upper link, the link, and the lower horizontal member. The lower horizontal member of the parallelogram link mechanism is a rail that can be connected to a fixed rail provided on the shelf side, and positioning members for both rails are fixed to the fixed rail side of the rail.

[Function] Therefore, in the present invention, when connecting the rails of the lifting platform with the rails on the shelf side, the parallelogram link mechanism is moved and rotated, and the rails on the shelf side are sandwiched between the positioning members and matched. I do. Also, the impact generated during matching is absorbed by the elastic body.

[Example] Hereinafter, an example of the present invention will be described based on the accompanying drawings.

First, the outline of the warehouse equipment will be explained with reference to FIGS. 6 to 8. On both sides of a passageway 1, shelves 4 equipped with shelf boards 3 for loading small rectangular parallelepiped loads 2 are arranged. A plurality of shelf boards 3 are arranged in the longitudinal direction of the shelf 4, and are also arranged in a plurality of stages in the vertical direction at approximately equal pitches.

There is a transport cart 5 on the side of the left and right shelves 4 facing the aisle 1.
A rail 6 on which the train runs is fixed to each stage. The transport vehicle 5 is equipped with a drive wheel 8 that can be rotationally driven via a drive shaft 7 by a drive device (not shown) and a driven wheel 9 that is not driven. are movably fitted. In addition, the conveyance truck 5 is, for example,
It is equipped with a transfer device 10 consisting of a traverse section and a conveyor section as shown in Newsletter No. 107706, and the belt conveyor 11 of the transfer device 10 is designed to be able to traverse toward the shelf 4 side and rotate the conveyor belt. By driving the belt conveyor 11, the cargo 2 can be loaded and unloaded.

A lifting device 12 is provided at one end of the shelf 4 that is connected to the passage 1.
A mast 13 is erected and fixed on the floor, and a chain 15 is drivably spanned over a sprocket fixed to the output shaft of a drive device 14 disposed on the side of the mast 13. Must have 1
A lifting platform 16 that can be moved up and down along the vertical axis 3 is suspended, and by driving a chain 15 by a drive device 14, the lifting platform 16 can be moved up and down.

The details of the lifting platform 16 will be explained with reference to FIGS. Elevating platform 1 at the top of both sides
6. A square shaft 17 is fixed to the square shaft 17, which projects horizontally toward the center, and an elastic body 18 for shock absorption, such as rubber, is attached to the square shaft 17, as shown in FIGS. 1, 3, and 4. An upper link 19 (hereinafter simply referred to as link 19) is attached to the lifting platform 16 via a mast 13.
Guide wheels 20 and 21 are attached so that they can roll along.

The link 19 extends in the traveling direction of the transport vehicle 5, and links 24 and 25 extending downward are pivotally connected to the front and rear ends of the link 19 via pins 22 and 23.
The rail 2 is connected to the lower end of the rail 25 via pins 26 and 27.
A parallelogram link is formed by the links 19, 24, 25, and the rail 28, and the rail 28 is provided so as to be connectable to the rail 6. A recessed rail positioning member 29 is fixed, and the rod end of a hydraulic cylinder 30 attached to the lower surface of the lifting platform 16 is connected to the lower surface of the rail 28 via a bracket 31.

In addition, in the figure, 32 is a warehousing device, and 33 is a warehousing device.

Next, the operation of the present invention will be explained.

Lifting device 1 moves the carrier 5 from the rail 6 on the shelf 4 side.
When transferring to the rail 28 provided on the lifting platform 16 of No. 2, or from the rail 28 of the lifting platform 16
When transferring to rail 6, move to rail 28.
It is necessary to match the rails 6 to the rails 6 of a predetermined stage. For this purpose, the drive device 14 drives the chain 15.
is driven to raise and lower the lifting table 16 integrally with the rail 28, and when the rail 28 reaches approximately the same height as the rail 6 of a predetermined step, the lifting table 16 is stopped.

When the rail 28 of the lifting platform 16 is at approximately the same level as the predetermined rail 6, the hydraulic cylinder 30 is actuated by a predetermined stroke in the direction in which the rod contracts.
Then, since the rail 28 is pivotally supported by the link 19 via the links 24 and 25, it moves toward the rail 6 due to parallelogram motion, and the rail positioning member 29 fixed to the tip side of the rail 28 moves the rail 6. By sandwiching the rails 6 and 28, they are matched and connected. When correcting the rail 28, if there is a step between the rails 6 and 28, the rail 2
An impact acts on link 24,
25 to the link 19, and from the link 19 it is easily absorbed by the elastic body 18. Therefore, there is no need to make the mast 13 etc. very strong.

FIG. 5 shows an example in which the shock absorbing elastic body 34 applied to the present invention is attached in a ring shape to the pins 22 and 23 instead of to the square shaft 17 at the center of the link 19. Even with such a configuration, the impact acting on the rail 28 during straightening of the rail 28 is easily absorbed by the elastic body 34. In this case the link 19 is the axis 35
It is fixed to the elevating table 16 by etc. Further, the elastic body 34 may be provided at the pins 26 and 27,
Alternatively, it may be provided at the pins 22, 23, 26, and 27.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes may be made without departing from the gist of the present invention.

[Effects of the invention] According to the rail position correction device of the invention, even if there is a level difference between the rail provided on the lifting platform and the rail on the shelf side, it is possible to easily match both rails, and therefore, it is possible to easily match both rails. can achieve various excellent effects, such as being able to smoothly transfer from one rail to the other, and being able to absorb shocks during rail matching without difficulty.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an embodiment of the rail position correction device of the present invention, Fig. 2 is a view taken from the - direction arrow in Fig. 1, and Fig. 3 is a horizontal force support applied to the rail position correction device of the present invention. An explanatory diagram of an example of the part, Fig. 4 is the third
5 is an explanatory diagram of another example of the horizontal force support part applied to the rail position correction device of the present invention, and FIG. 6 is a warehouse equipment to which the rail position correction device of the present invention is applied. FIG. 7 is a plan view of FIG. 6, and FIG. 8 is a side view of FIG. 6. In the figure, 4 is a shelf, 5 is a transport vehicle, 6 is a rail, 12
1 is a lifting device, 16 is a lifting platform, 18 is an elastic body, 1
9, 24, 25 are links, 28 is a rail, 29 is a rail positioning member, 30 is a fluid cylinder, 34
indicates an elastic body.

Claims (1)

[Scope of utility model registration request] A lifting platform that can be raised and lowered is provided with a substantially central portion in the longitudinal direction of the upper link extending in a direction parallel to the traveling direction of the conveying cart so that it can be moved in a direction parallel to the traveling direction of the conveying cart and in a vertical plane parallel to the traveling direction of the conveying cart. A link is pivotally supported via an elastic body so as to be able to rotate relative to the upper link, and a link that extends downwardly and can swing in a direction parallel to the traveling direction of the transport vehicle is pivotally attached to the front and rear parts of the upper link in the longitudinal direction. A lower horizontal member is pivoted to the lower end of the parallelogram in parallel with the upper link, the upper link and the link and the lower horizontal member form a parallelogram link mechanism, and the lower horizontal member of the parallelogram link mechanism is attached to the shelf side. 1. A rail position correction device, characterized in that the rail is connectable to a fixed rail provided on the rail, and positioning members for both rails are fixed to the fixed rail side of the rail.