JPS6042124B2 - Trolley transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a truck transfer device for transferring a truck between a lifting platform of a stacker crane and a shelf side rail.

In stacker cranes used in automated warehouses,
This work involves transferring the cart carrying the load from the main rail installed on the lifting platform of the stacker crane to the mating rail installed on the shelf in the warehouse.

Also, transfer work in the opposite direction is also performed. Conventional bogie transfer methods include one in which the main rail and the other rail are kept at the same level to take into account shock and smoothness during transfer, and one in which the bogie is already at the same level as the rail on the side receiving the bogie transfer. There is a method of controlling the position of the rail on the side that is facing upward.

In the former method, in which the main rail and the mating rail are placed at the same level, a mechanical positioning device is required for each shelf in addition to accurate positioning. For this reason, there are disadvantages in that it takes time and effort to install the positioning device and requires a lot of time for positioning. In addition, in the latter method, different vertical positioning controls must be performed depending on when the cart is received and when it is sent out, so there is a loss of effort and time due to redoing positioning control when the cart moves back and forth. It has the disadvantage of causing An object of the present invention is to quickly and smoothly transfer carts without spending time on positioning control. An embodiment of the present invention will be described below with reference to FIGS. 1 to 12.

As shown in Figures 1 and 4, the truck 1 has four main wheels 2 on the side.
, 3, 4, 5, with a total of 8 main wheels on both sides.

Further, two auxiliary wheels 6 are provided on the lower surface of each of the front and rear ends of the truck 1. On the other hand, the lifting platform 8 of the stacker crane is provided with two parallel main rails 9 for receiving the main wheels 2, 3, 4, and 5, as shown in FIGS. 2 and 4.

In addition, at the four corners of the area surrounded by the main rail 9, there are third
A chevron-shaped sub-rail 10 as shown in the figure is provided on the lifting platform 8 in an arrangement as shown in FIGS. 2 and 4. As shown in FIG. 5, the main rail 9 is sloped downward toward the end to facilitate receiving the main wheels 2, 5. In this embodiment, how the cart 1 is transferred between the mating rail 11 provided on the shelf and the main rail 9 will be described. When the trolley 1 is riding on the main rail 9 on the stacker crane and is about to transfer from this state to the mating rail 11 on the shelf, the trolley 1 changes from the state shown in FIG. 6 to the state shown in FIG. 1 is the main wheel 2 at this point.
is already on top of the other rail 11, and as the bogie 1 moves further, the center of gravity of the bogie 1 shifts, so it tilts as shown in Figure 8, and the main wheels come into contact with each other's rails 9 and 11 and transfer. go.

And just before the wheel is completely transferred, the last wheel 5 to transfer is,
As shown in FIG. 9, the trolley 1 is lifted together with the end by the auxiliary wheels 6 riding on the auxiliary rails 10. In this way, when the last main wheel 5 of the truck 1 is transferred, it is possible to transfer from the state shown in FIG. 9 to the state shown in FIG. 10 without hitting the edge of the mating rail 11. Next time, move trolley 1 to main rail 9.
When the main wheels 5 return to the auxiliary rail 10 as shown in FIG. It is lifted up by secondary wheels 6. When the auxiliary wheels 6 reach the top of the auxiliary rail 10, the main wheels 5 of the bogie 1 are positioned on the main rail 9, and the transfer to the main rail 9 side is performed in the opposite manner to the method used to transfer to the other rail 11. It will be completed. The lifting platform 8 is stopped so that the main rail 3 is always above the opposing rail 5 by a vertical step C when the cart 1 comes out from the main rail 9 and when it returns, and at the worst, the platform 8 is kept at the same level. In this way, in this embodiment, accurate positioning control and its means, as well as the use of accurate positioning control and means for moving the trolley 1 forward and back, enable smooth transfer in a short time without the need for repositioning.

As described above, according to the present invention, there is no need for time-consuming and accurate positioning work or repositioning work when moving the trolley forward and back, so the cargo handling cycle time of the trolley is improved, and the main Since the wheels are lifted at the time of transfer, the trolley can smoothly cross between transfers.

[Brief explanation of drawings]

FIG. 1 is a top view of a bogie according to an embodiment of the present invention, FIG. 2 is a plan layout diagram of main and sub-rails according to an embodiment of the present invention,
FIG. 3 is an elevational view of the sub-rail shown in FIG. 2, FIG. 4 is a relationship diagram between the bogie shown in FIG. 1 and each rail shown in FIG. 2,
FIG. 5 is an elevational view of the main rail shown in FIG. 2, FIG. 6 is an elevational view showing the state before the start of transfer in one embodiment of the present invention, and FIG. 7 is also a view showing the state during transfer. 8 is an elevational view showing a state where the transfer has further progressed, FIG. 9 is an enlarged elevational view of the main part of the state at the final point of transfer in an embodiment of the present invention, and FIG. 10 is the same. Fig. 11 is an enlarged elevational view of the main part in the state after the transfer, Figure 11 is an enlarged elevational view of the main part in the state where transfer in the opposite direction has started in one embodiment of the present invention, and Fig. 12 is the same when the transfer has further progressed. It is an enlarged elevational view of the main part of the state. 1...Bogie, 2, 3, 4, 5...Main wheel, 6...Secondary wheel, 9...Main rail, 1
0... Sub-rail, 11... Opposite rail.

Claims (1)

[Claims] 1. In a cart transfer device that transfers a load carrying cart between the lifting platform of a stacker crane that runs between shelf rows and the shelf side rail, a rail separate from the main wheels for running the cart is used. Secondary wheels are provided at both ends of the trolley at a position where it can run, and which are closer to the ends in the longitudinal direction of the trolley than the main wheel installation position, and on the lifting platform, the trolley is moved toward the shelf. a main rail for the main wheels, and a chevron-shaped sub-rail parallel to the main rail at a position opposite to the sub-wheel and at the shelf side end of the elevating platform, the chevron-shaped sub-rail teeth,
A dolly having a height and length that allows the main wheels that are finally transferred to the shelf side to be transferred while being lifted above the main rail surface by the sub wheels that have ridden on the sub rails. transfer equipment.