JPH0551807U - Stacker crane - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a stacker crane capable of positioning a pallet mounted on a lifting platform at an appropriate position and preventing transfer failures of the pallet in advance. [Structure] Lower frame 11 traveling on traveling rail 1
A stacker crane comprising a pair of left and right masts 12 and 13 which are erected on the lower frame 11, and an elevating table 14 that moves up and down along the masts 12 and 13, and is provided on the lower frame 11. The present invention is characterized by including a positioning tool 16 which is installed upright and corrects and positions the mounting position of the pallet P mounted on the elevating table 14.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stacker crane used in an automated warehouse or the like. In particular, the present invention relates to a stacker crane that can correct and position the loading position of luggage loaded on a lifting platform.

[0002]

[Prior Art]

 FIG. 5 is a schematic plan view showing an automatic warehouse using a general stacker crane.

In FIG. 1, reference numeral 1 is a traveling rail, and 2 is a stacker crane traveling along the traveling rail 1. The stacker crane 2 includes a lower frame 3 that travels on the traveling rail 1, a front mast 4 and a rear mast 5 that are erected on the lower frame 3, and a lift table 6 that moves up and down along the masts 4 and 5. I have it.

A slide fork 7 is provided on the elevating table 6 so that a pallet carrying the luggage W1 can be transferred between shelves and the like. Reference numeral 8 denotes a shelf provided along the traveling rail 1, and is composed of a plurality of columns 9 and a beam 10 passed over these columns 9.

In the automatic warehouse having such a configuration, the stacker crane 2 travels along the traveling rails 1 to elevate the elevating table 6, and the slide fork 7 is used to palletize between the shelves 8 and the stations. Put P in and out.

[0006]

[Problems to be solved by the device]

 The above-mentioned conventional stacker crane has the following problems.

Since the stacker crane is not provided with a means for positioning the pallet P, there is a risk that the pallet mounted on the elevating table 14 during the transfer of the pallet may be displaced and may come into support in the loading / unloading warehouse.

An object of the present invention is to solve the above-mentioned conventional problems, to position a pallet mounted on a lift table at an appropriate position, and prevent pallet transfer failure in advance. It is to provide a stacker crane that can handle the above.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is a stacker including a lower frame that travels on a traveling rail, a pair of left and right masts that are erected on the lower frame, and an elevator that moves up and down along the masts. The crane is provided with a positioning device which is erected on the lower frame and corrects and positions the mounting position of the pallet mounted on the lift table.

[0010]

[Operation effect]

 Since the present invention has the above-mentioned configuration, it has the following operational effects.

That is, after mounting a pallet on a lift table from a loading station or the like using a slide fork, the lift table is once lowered onto the lower frame. On the lower frame, there is a positioning tool that corrects and positions the mounting position of the pallet mounted on the lift, so the pallet mounted on the lift should be placed at the proper position on the lift. Will be positioned. After that, the positioned pallet is transferred to a shelf or the like by a sliding fork.

As described above, according to the stacker crane of the present invention, it is possible to position the pallet mounted on the elevating table at an appropriate position, and prevent the pallet transfer failure from occurring. is there.

[0013]

【Example】

 Hereinafter, the illustrated embodiment will be described.

FIG. 1 is a schematic front view showing an embodiment of a stacker crane according to the present invention, FIG. 2 is a schematic plan view of the same, and FIG. 3 is a perspective view of a positioning tool.

In these drawings, 1 is a traveling rail, and 10 is a stacker crane traveling along the traveling rail 1. Reference numeral 20 denotes a shelf mounted on the pallet P and accommodating the luggage W, and having a plurality of racks.

The stacker crane 10 includes a lower frame 11 that travels on the traveling rail 1, a front mast 12 and a rear mast 13 that are erected on the lower frame 11, and an elevating platform 14 that moves up and down along the masts 12 and 13. Is equipped with. Reference numeral 15 is a slide fork provided on the lifting table 14 so that the pallet P can be transferred between the shelf 20 and the station.

Reference numerals 16 and 16 denote a pair of positioning tools fixed on the lower frame 11, and are arranged in accordance with the lateral width W of the pallet P. Reference numerals 17 and 17 denote pallet mounting portions of the positioning tool 16, which are erected in accordance with the depth D of the pallet P so that the respective corner portions of the pallet P are mounted on the upper portion. Reference numerals 18 and 18 denote guide plates that are erected on the upper portion of the pallet mounting portion, and are erected on the upper portion of the pallet mounting portion 17 so as to extend radially and have a wide opening 18a. Such a positioning tool 16 allows the guide plates 18 to come into contact with the respective corner portions of the pallet P and bring the pallet P to an appropriate position when the lift table 14 having the pallet P mounted thereon is lowered onto the lower frame 11. The position of the pallet P is set so that the corners of the pallet P are guided on the pallet mounting portion 17 even if the pallet P is slightly displaced.

Next, the operation of the stacker crane having the above-described configuration will be described by taking as an example the case where a pallet received from the loading station is stored in a shelf.

As shown in FIG. 4A, the pallet P on the loading station S is pulled out by the slide fork 15 onto the lift table 14. Then, the stacker crane 10 is made to travel toward the shelf 20. At the same time, as shown in FIG. 4B, the lifting platform 14 is lowered onto the lower frame 11 at the bottom of the crane. Then, the pallet P mounted on the elevating table 14 is placed on the pallet rest 17 of the positioning tool 16. In this case, even if the pallet P on the elevating table 14 is slightly displaced, the position is suitably corrected by the guide plates 18 and 18 and the pallet P is placed on the pallet placing portion 17. As a result, even if the pallet conveyed to the loading station S is misaligned, the pallet P can be corrected to the proper position before entering the shelves.

After that, as shown in FIG. 4C, the elevating table 14 is lifted to mount the pallet P mounted on the pallet platform 17 on the elevating table 14. In this case, the level difference between the loading station S and the lowermost stage of the crane is small, and since the position linkage operation is performed during the movement of the crane, no loss time is generated.

After that, as shown in FIG. 4D, the elevating table 14 is moved up and down to a predetermined position of the shelf 20, and the pallet P is transferred into the rack of the shelf 20 by the slide fork 15. In this way, the pallets P received from the loading station S can be positioned and stored on the shelves 20.

When the pallet P is unloaded from the shelf 20 to the loading station S, it can be carried out by the reverse operation to the above operation. That is, after the pallet P is transferred from the shelf 20 to the elevating table 14 by the slide fork 15, the pallet P is positioned by the positioning tool 16 and is then delivered to the loading station S.

As described above, according to the stacker crane of the present embodiment, the pallet mounted on the lift table can be positioned at an appropriate position, and the transfer failure caused by the displacement of the pallet can be prevented. be able to.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, but can be appropriately modified and implemented within the scope of the gist of the present invention.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an embodiment of a stacker crane according to the present invention.

FIG. 2 is a schematic plan view of the same.

FIG. 3 is a perspective view of a positioning tool.

FIG. 4 is a diagram for explaining the operation when the pallet is stored.

FIG. 5 is a schematic plan view of an automatic warehouse using a conventional stacker crane.

[Explanation of symbols]

 10 Stacker Crane 11 Lower Frame 14 Lifting Platform 15 Slide Fork 16 Positioning Tool P Pallet

Claims (1)

[Scope of utility model registration request] 1. A stacker crane comprising a lower frame that travels on a traveling rail, a pair of left and right masts that are erected on the lower frame, and a lifting platform that moves up and down along the masts. A stacker crane, comprising a positioning tool which is erected on a lower frame and corrects and positions the mounting position of a pallet mounted on a lift table.