JP2001294310A - Picking system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a picking system capable of effectively forming discharge pallets bound for customers without enlarging the space and managing well with even an order in minor quantity. SOLUTION: Packaged goods of single item are stacked in layers on goods pallets in a plurality of sorts, and the picking system is to form a discharge pallet bound for customer containing a plurality of items of goods stacked in multiple layers, wherein the operations by this system comprise a first process I in which the goods in single item on the goods pallet 20 are divided layer by layer according to the operation plan prepared on the basis of orders given from a plurality of customers and a second process II in which goods of various items divided by the first process I layer by layer are stacked so that each discharge pallet 30 bound for respective customers is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a picking system for picking a packed product packed in a cardboard box, plastic, or the like according to an order. More specifically, a single type of packed product is stacked in multiple layers. The present invention relates to a picking system for picking a product pallet in layers and forming a shipping pallet for a customer in which different types of packaged products are stacked in multiple layers.

[0002]

2. Description of the Related Art In a conventional picking system of this type, a plurality of types of product pallets required for forming a shipping pallet for one customer are sequentially sent to a depalletizer that takes out the product pallets in layers, and the required number of layers is obtained. After taking out the pallets, they are supplied to a palletizer that is stacked in layers on the pallet, and different types of packing products are stacked on the shipping pallet.

[0003] Therefore, in order to complete a shipping pallet for a plurality of customers, it is necessary to send the same type of product pallet to the depalletizer a plurality of times and replace the product pallet each time, thereby complicating the work plan. In addition, it is necessary to re-enter the automatic warehouse for the product pallets having the remaining number, and the frequency of entering and exiting the automatic warehouse increases, which may cause a problem of insufficient processing capacity of the entire picking system.

[0004] As one example for solving such a problem, there is a picking device described in Japanese Patent Application Laid-Open No. 147743/1993. This picking device connects a plurality of palletizers in series to a single depalletizer via a transport mechanism, takes out the necessary layers from the product pallets of the same product type supplied from the conveyor, and converts them into empty pallets on the palletizer side. By stacking, the number of times of supply and replacement of the product pallets and the frequency of attending the automatic warehouse are reduced.

[0005]

Problems to be Solved by the Invention
The picking device described in Japanese Patent Publication No. 3 is, for example, in the case of a general distribution center that handles several hundred kinds or more of packaged products, the ratio of the same type of packaged product to a plurality of shipping pallets is low. In addition, the operating rate of the palletizers installed in a plurality may be reduced, and as a result, the processing capacity of the picking system may be insufficient.

In order to simultaneously reduce the number of times of supplying the same type of packaged goods, it is conceivable to increase the number of palletizers. However, this requires not only a large amount of space but also a large amount of palletizers. The transport efficiency will be reduced. Furthermore, recently, there has been a tendency for small-lot shipments of various kinds, and the proportion of shipments in units of packaged goods has been increasing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can efficiently form a shipping pallet for a customer without increasing the space, and can cope with a small order. It is an object of the present invention to provide a picking system that can perform the picking.

[0008]

SUMMARY OF THE INVENTION The present invention forms a shipping pallet for a customer in which different types of products are stacked in multiple layers from a plurality of types of product pallets in which a single type of packed product is stacked in multiple layers. A first step of dividing a product of a single product type on the product pallet in units of layers based on a work plan in which orders of a plurality of customers are organized; and a step of dividing the products in layers in the first step. A second step of stacking the divided products of different types to form a shipping pallet for a customer.

The present invention is also a picking system for forming a shipping pallet for a customer in which different types of products are stacked in multiple layers from a plurality of types of product pallets in which packed single type products are stacked in multiple layers. The product pallet includes a depalletizer that divides the product in units of layers from the product pallet, and a palletizer that places the products in units of layer divided by the depalletizer on the product pallet, based on a work plan in which orders of a plurality of customers are organized. A first step of dividing the product into product pallets in units of layers, a plurality of storage conveyors for storing the product pallets divided in units of layer in the first process for each product type, It consists of a mix face palletizer that stacks various types of product pallets in multiple layers, and stacks product pallets of different types to create a shipping pallet for customers. It is obtained by a second step of forming.

[0010] Further, the present invention provides a method for producing a plurality of types of product pallets in which a single type of packed product is stacked in multiple layers.
What is claimed is: 1. A picking system for forming a shipping pallet for a customer in which products of different types are stacked in a multilayer, a depalletizer that divides a product in units of layers from the product pallet, and a product in units of layers divided by the depalletizer. A palletizer to be placed on a pallet, a face palletizer to load a product pallet on which products are placed by the palletizer in a multilayer manner, and has products divided by the layer unit based on a work plan in which orders of a plurality of customers are organized. A first step of stacking product pallets in multiple layers, a plurality of storage conveyors for stacking the product pallets stacked in the first step for each product type, and the multilayer products stored on these storage conveyors Face unit depalletizer for dividing pallets into pallets, and face unit palletizer The product palette of the divided different varieties consists of a mix face palletizer to stack the multi-layer, in which a second step of forming a shipping pallet for customers by stacking items palette different varieties.

In each of the first steps described above, when the commodities on the commodity pallet are divided into layers, unnecessary commodities on the shipping pallet are separated into cases and conveyed to an automatic case warehouse. .

Further, a case palletizer for stacking products in case units in each of the above-mentioned second steps is provided, and when stacking different types of product pallets in multiple layers in the second step,
Cases are stacked by the case palletizer according to the order quantity of the layer unit or less.

Further, a pallet storage shelf having a plurality of shelves instead of the storage conveyor or the storage conveyor face unit depalletizer in the above-mentioned second step, and a pallet transfer device for putting product pallets in and out of the pallet storage shelf Was provided.

[0014]

[First Embodiment] FIG. 1 is a block diagram showing the steps of a picking system according to a first embodiment of the present invention, and FIG. 2 is an explanatory diagram of the configuration of each step. The numbers enclosed by rectangles in the figure indicate each shipping pallet and the corresponding product pallet in operation. In the figure, 11
Is a vertically movable depalletizer, in which a plurality of cases each containing a single type (eg, type C) are packed to form a layer by packing the cases, and a supply conveyor is supplied from an automatic warehouse (not shown). Product pallet 2 transported by 12
0 is loaded, and the packaged goods are detached from the upper part in units of layers by, for example, a clamp 22. A discharge conveyor 13 whose end is connected to an automatic warehouse is provided on the output side.

Reference numeral 14 denotes a vertically movable palletizer provided on the line of the discharge conveyor 13 on the downstream side of the depalletizer 11, which is separated by the depalletizer 11 onto an empty pallet 21 serving as a product pallet sent in the direction of the arrow. The packaged product of each layer is loaded. The depalletizer 11 and the palletizer 14 constitute a first step I.

Reference numeral 15 denotes a storage unit for storing a product pallet comprising a plurality of storage conveyors 15a, 15b, and 15c arranged in a plurality of rows (three rows are shown in the figure) arranged orthogonally to the discharge conveyor 13. On the conveyors 15a, 15b, and 15c, product pallets on which packing products of the single types A, B, and C corresponding to the respective shipping pallets for customers are stored. Reference numeral 16 denotes a shipping conveyor provided at the exit side of the storage conveyors 15a to 15c and orthogonal to the storage conveyor 15a. A mix face palletizer 17 which can move up and down is provided downstream of the junction with the storage conveyor 15c. The face palletizer 17 stacks different types of packaged products for customers on a shipping pallet, and carries it out to a shipping station or the like. These storage conveyors 15a to 15c
And the mix face palletizer 17 constitute the second step II.

Numeral 30 indicates the state of a shipping pallet in which different kinds of packed goods are stacked by the mix face palletizer 17 in accordance with the order of the customer. One layer of package goods of type C is stacked, and one layer of packed goods of type A, one layer of packed goods of quality B, and two layers of packed goods of type C are placed on the shipping pallet 3. Have been.

Next, the operation of the present embodiment configured as described above will be described. Commodity pallets 2 in which packing products of a single type (for example, type C) are stacked in multiple layers, sent out from the supply conveyor 12 and placed on the depalletizer 11
0 is based on a work plan that has organized orders for multiple customers,
For example, with the two-way or four-way clamp 22, the product C
Product of shipping pallet 5 that requires one layer
Are packaged on the shipping pallet 7 which requires three layers. In dividing the packaged product, other means may be used, such as, for example, removing the packaged product in layers by a pickup roller method.

On the other hand, an empty pallet 21 serving as a product pallet is fed onto the palletizer 14, and a single-layer packaged product of the type C divided on the depalletizer 11 is placed on the palletizer 14. Conveyor 15c provided at the most downstream side
Sent up. The product pallet 20 on which the three-layer packaged product of the type C is placed is carried out from the depalletizer 11 through the palletizer 14 by the discharge conveyor 13, and the single-layered packaged product carried out earlier is placed thereon. Following the product pallet, it is sent onto the storage conveyor 15c.

Incidentally, the storage conveyors 15a, 15b,
15c, the varieties A,
The packaged products B and C are placed on a product pallet in accordance with the above-described work plan and are respectively accumulated. That is, all the packing products of the type A are stored on the storage conveyor 15a, and in the figure, a product pallet 25a on which three layers of packing products corresponding to the shipping pallet 1 are placed from the downstream side, and a shipping pallet. A product pallet 25b on which a single-layer packed product corresponding to 3 is placed, a product pallet 25c on which a 2-layer packed product corresponding to the shipping pallet 4 is placed,
The figure shows a case where commodity pallets 25d on which three layers of packaged commodities corresponding to the shipping pallets 5 are placed are sequentially accumulated. However, the case where the product pallet 25a on the most downstream side is transferred onto the shipping conveyor 16 is shown.

Similarly, packing goods of the type B are all stored on the storage conveyor 15b. In the figure, a goods pallet 26a on which two layers of packing goods corresponding to the shipping pallet 2 are placed from the downstream side is shown. A case is shown in which a product pallet 26b on which a single-layer packaged product corresponding to the shipping pallet 3 is placed and a product pallet 26c on which a 3-layer packaged product corresponding to the shipping pallet 6 is placed are sequentially accumulated. .

Further, all kinds of packaged goods of type C are stored on the storage conveyor 15c, and in the figure, a goods pallet 27a on which a single-layer packed goods corresponding to the shipping pallet 1 is placed from the downstream side, A case is shown in which a product pallet 27b on which two layers of packed goods corresponding to the shipping pallet 2 are placed and a product pallet 27c on which two layers of packed goods corresponding to the shipping pallet 3 are placed are sequentially stored. However,
The case where the product pallet 27a on the most downstream side is transferred onto the shipping conveyor 16 is shown.

In forming a shipping pallet (for example, shipping pallet 1) according to a customer's order, first,
The product pallets 27a on the storage conveyor 15c and the product pallets 25a on the storage conveyor 15a are transferred onto the transport conveyor 16, transported by the shipping conveyor 16, and placed on the mix face palletizer 17. Then, mix face palletizer 1
7, the product pallet 27a is lifted, and the product pallet 25a conveyed by the shipping conveyor 16 is inserted below it. When the product pallet 25a is lowered and placed on the three-layer packaged product on the product pallet 25a, the shipping pallet 1 for the customer is formed.

The shipping pallet 1 thus formed
Are transported by the shipping conveyor 16 and sent to, for example, a shipping station and shipped. Note that the product pallet 25a may be first sent onto the mix face palletizer 17, and then the mix face palletizer 17 may be lowered to load the product pallet 27a thereon.

As described above, the storage conveyors 15a, 1
The product pallets on 5 and 15c are sequentially sent to the mix face palletizer 17 from the packing products of the varieties loaded in the upper (or lower) order according to the work plan in which the orders of a plurality of customers are organized, and are placed on the shipping pallets. Stacked and shipped in multiple layers. At this time, the product pallets sent out from the palletizer 14 according to the work plan are sequentially stored in the corresponding storage conveyors 15a, 15
b, 15c and waits. After being divided by the depalletizer 11, the product pallet 20 having the remaining packed product (unnecessary product in the shipping pallet) is again returned to the automatic warehouse by the discharge conveyor 13 or the conveyor 13 a branched from the outlet side of the palletizer 14. Returned to

According to the present embodiment, as described above, a first kind of packaged product, which is stacked on a product pallet, is divided into a plurality of products in layers based on a work plan in which orders of a plurality of customers are organized. And the second step II of accumulating the packaged goods divided in the first step I for each kind and stacking different kinds of packed goods to form a shipping pallet for customers. From a plurality of types of product pallets in which a single type of packaged product is stacked in multiple layers, it is possible to efficiently form a shipping pallet for a customer in which different types of packaged products are stacked in multiple layers.

[Second Embodiment] FIG. 3 is a block diagram showing steps of a picking system according to a second embodiment of the present invention, and FIG. 4 is an explanatory view of the configuration of each step. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 18 denotes a vertically movable face palletizer provided on the downstream side of the palletizer 14. The face palletizer 18 is divided into layers by the depalletizer 11, and is used for stacking the same type of packaged product placed on the product pallet in multiple layers in the product pallet. The first step I is constituted by the depalletizer 11, the palletizer 14, and the face palletizer 18.

Numerals 19a, 19b, and 19c denote face unit depalletizers provided between the storage conveyors 15a, 15b, and 15c and the shipping conveyor 16 at the downstream side of the storage conveyors 15a, 15b, and 15c. The product pallets of the same kind are separated again in units of product pallets. The second step II is performed by the storage conveyors 15a, 15b, 15c, the face unit depalletizers 19a, 19b, 19c, and the mix face palletizer 17. Is configured.

In the present embodiment, as in the case of the first embodiment, for example, a packaged product of the same type C stacked by the depalletizer 11 is converted into a single-layered packaged product and a three-layered packaged product. The pallets are divided, and one layer of packaged goods corresponding to the shipping pallet 6 is placed on the empty (goods) pallet 21 sent on the palletizer 14 and transferred onto the face palletizer 18. Then, the product pallet 21 is lifted by the face palletizer 18, the three-layer packaged product corresponding to the shipping pallet 7 is placed, and the product pallet 20 sent through the palletizer 14 is put under the product pallet 21, The pallet 21 is lowered and stacked. And
The sheet is conveyed by the discharge conveyor 13 and transferred onto the storage conveyor 15c. The product pallet 20 is placed on the face palletizer 18 first, and the product pallet 21 is placed thereon.
May be stacked.

Each of the storage conveyors 15a, 15b, 1
The face unit depalletizers 19a, 19b, and 19c provided downstream of the product pallet 5c are provided, for example, with the product pallets 25a and 25b on which the package products of the same type A are stacked and sent to the shipping pallet 1.
Pallet 25a having three layers of packaged goods corresponding to
And a product pallet 25b having one layer of packaged goods corresponding to the shipping pallet 3 in units of product pallets, and the product pallet 25b is divided into face unit depalletizers 1
It has a function of transferring only the product pallet 25a to the shipping conveyor 16 while remaining on the 9a. Other operations are the same as those in the first embodiment.

In the present embodiment, the product pallets obtained by dividing the packaged products in units of layers in the first step I are stacked in multiple layers in units of product pallets for each same type, and the second step
II, and in the second step II, a large number of product pallets can be stored in the storage conveyors 15a, 15b, 15c because they are separated into product pallets corresponding to the shipping pallets 1 to 7. Therefore, the whole picking system can be saved in space.

[Embodiment 3] FIG. 5 is a block diagram showing steps of a picking system according to Embodiment 3 of the present invention, and FIG. 6 is an explanatory view of the structure of each step. This embodiment is different from the second embodiment in that, in the first step I, the conveyor 13b which separates unnecessary packing goods from the shipping pallet into case units on the exit side of the palletizer 14 and sends them to a case automatic warehouse (not shown). In the second step II, a case palletizer 28 is provided on the upstream side of the mix face palletizer 17 in order to load a small amount of products less than the packaged products on a product pallet on the shipping conveyor 16 in case units. It is provided. The same parts as those in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted.

That is, when the depacketizer 11 divides a packaged product based on a work plan, extra packaged products are separated for each case, and the palletizer 1
The pallet 4 is placed on an empty pallet 21 and returned to the automatic case warehouse by a conveyor 13b provided on the exit side of the palletizer 14. When a small quantity of products less than the packed products is required, the products of each type stored in the case automatic warehouse are picked from the case automatic warehouse based on the work plan, and the mixed face palletizer 17 is picked up. It is sent to a case palletizer 28 provided on the upstream side, and is stacked on a product pallet conveyed on the shipping conveyor 16.

In the present embodiment, in the first step I, extra packed goods are separated into case units and sent to an automatic case warehouse, and in the second step II, case-by-case goods are stacked on a goods pallet. Therefore, it is possible to easily cope with an order of a small quantity less than a layer unit. In the above description, a case has been described in which the present embodiment is applied to the second embodiment, but the present embodiment can be similarly applied to the first embodiment.

[Fourth Embodiment] FIG. 7 is a block diagram showing steps of a picking system according to a fourth embodiment of the present invention, and FIG. 8 is an explanatory view of the structure of each step. The same parts as those in the third embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the figure, reference numeral 31 denotes a crane delivery port branched from the unloading conveyor 13, 32 denotes a plurality of (for example, three) shelves vertically between the crane delivery port 31 and the shipping conveyor 16. One row or plural rows (for example, three rows 32a, 32b, 32
It is a pallet storage shelf provided in c).

Reference numeral 33 denotes a pallet transfer device such as a stacker crane or a forklift, which is movable in the vertical, front-rear, and left-right directions, and is movably mounted on, for example, a rail 34 provided orthogonally to the pallet storage shelf 32. I have.
The pallet storage shelf 32, the pallet transfer device 33, the case palletizer 28, and the mix face palletizer 17 constitute a second step.

In the present embodiment configured as described above, a product pallet (for example, 25a) in which product pallets of the same type are stacked by the face palletizer 18
Are transported on the unloading conveyor 13 and then transferred to the crane delivery port 31. When the product pallet 25a is transferred to the crane delivery port 31, the pallet transfer device 33 moves on the traveling path 34 and
Is picked up, and moved again on the traveling path 34 to store and store the product pallet 25a at a predetermined position (for example, 32a) of the pallet storage shelf 32. At this time, it is desirable that the product pallets loaded with the same type of product are stored in the same positional relationship, but may be stored in different positions.

When a product pallet is to be shipped, a predetermined product stored in the pallet storage shelf 32, for example, a product of type C corresponding to the shipping pallet 1 is transferred by the pallet transfer device 33. The pallet 27a and the product pallet 25a on which products of the type A are stacked in three layers are picked and placed on the shipping conveyor 16. Thereafter, the shipping pallet 1 is formed by the mix face palletizer 17 and shipped as in the case of the third embodiment. In addition,
If necessary, products in case units may be stacked on a product pallet conveyed on the shipping conveyor 16 by the case palletizer 28.

In the present embodiment, a plurality of rows of pallet storage shelves having a plurality of shelves are provided in the second step, and a product pallet on which goods are placed is stored and stored in the pallet storage shelves. Therefore, a large amount of product pallets can be stored, and at the same time, different types of combinations can be easily combined at the time of work planning, and the space of the picking system can be further reduced. In the above description, a case has been described in which the present embodiment is applied to the third embodiment, but the present embodiment can be similarly applied to the first and second embodiments.

In the first to third embodiments, the case where the storage conveyor is fixed and the products of the types A, B and C are allocated is described.
Rows of storage conveyors may be dynamically allocated to the products of the types A, B, and C. Further, in each of the above-described embodiments, for ease of explanation, the types of commodities to be placed on the commodities pallet have been described in the case of three categories of A, B, and C as representatives. In general, picking is performed for several hundred or more varieties.

[0041]

According to the first aspect of the present invention, there is provided a picking system.
A first step of dividing a single type of product on a product pallet in units of layers based on a work plan in which orders of a plurality of customers are organized, and stacking products of different types divided in units of layers in the first process And a second step of forming a shipping pallet for a customer, from a product pallet of a plurality of varieties in which a single kind of product is stacked in a multilayer, to a customer in which a multilayer of different kinds of products are stacked for a customer. Pallets can be formed efficiently.

Further, in the picking system according to the second aspect, a first step including a depalletizer that divides products in units of layers and a palletizer that places the products in units of divided layers on a pallet; A second step including a plurality of storage conveyors for storing the product pallets for each product type and a mix face palletizer for stacking product pallets of different types on the storage conveyors in multiple layers is provided. The effect can be obtained, and the space for the picking system can be reduced.

Further, in the picking system according to a third aspect, in the first step of the second aspect, a face palletizer for laminating a product pallet on which a product is placed by a palletizer in a multilayer manner is provided, and in the second step, Since the face unit depalletizer that divides the multi-layered product pallets stored on the storage conveyor into pallets is provided, the effect of claim 1 can be obtained, and the space of the picking system can be further reduced.

In the picking system according to the fourth aspect, in the first step of the first to third aspects, when the commodities on the commodity pallet are divided into layers, unnecessary commodities in the shipping pallet are separated into case units. The picking system according to claim 5, wherein
In the second step of claims 1 to 4, a case palletizer for stacking products in case units is provided, so that cases are stacked when a large number of products of different types are stacked, so that the order quantity in layer units or less can also be set. It can be easily handled.

Further, a picking system according to claim 5 is a pallet storage shelf having a plurality of shelves instead of the storage conveyor or the storage conveyor and the face unit depalletizer in the second step of claims 2 to 5, and A pallet transfer device for loading and unloading product pallets to and from the pallet storage shelf makes it possible to store a large amount of product pallets and facilitates different types of combinations when planning work.
In addition, the space of the picking system can be further reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing steps of a first embodiment of the present invention.

FIG. 2 is a configuration explanatory view of each step of FIG. 1;

FIG. 3 is a block diagram illustrating a process according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram of a configuration of each step of FIG. 3;

FIG. 5 is a block diagram showing steps of a third embodiment of the present invention.

6 is an explanatory diagram of a configuration of each step of FIG. 5;

FIG. 7 is a block diagram showing the steps of Embodiment 4 of the present invention.

8 is an explanatory diagram of a configuration of each step in FIG. 7;

[Explanation of symbols]

1-7 Shipping pallets and corresponding product pallets in operation 11 Depalletizer 13 Discharge conveyor 14 Palletizer 15a, 15b, 15c Storage conveyor 16 Shipping conveyor 17 Mix face palletizer 18 Face palletizer 19a, 19b, 19c Face unit depalletizer 20 , 21, 25a-25d, 26a-26c, 27a
~ 27c Product pallet 28 Case palletizer 31 Crane delivery port 32 Pallet storage shelf 33 Pallet transfer device

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yoichi Yoshinaga 1-1-2 Marunouchi, Chiyoda-ku, Tokyo, Japan Inside Nihon Kokan Co., Ltd. (72) Inventor Shinichiro Eto 1-2-1, Marunouchi, Chiyoda-ku, Tokyo, Japan Inside Honko Co., Ltd. (72) Inventor Hiroshi Ishikawa 1-2-1, Marunouchi, Chiyoda-ku, Tokyo F-term in Nippon Kokan Co., Ltd. 3F022 AA15 CC03 EE02 EE05 FF02 HH13 LL00 LL31 LL38 MM01 MM08 MM11 3F029 AA05 BA01 DA04 DA05 3F030 AA04 AA09 AB04 BB00

Claims (6)

[Claims] 1. A picking system for forming a shipping pallet for a customer in which different types of products are stacked in a multilayer manner from a plurality of types of product pallets in which a single type of packed product is stacked in a multilayer. A first step of dividing a product of a single type on the product pallet in units of layers based on a work plan in which orders of customers are organized, and stacking products of different types divided in units of layers in the first step; And a second step of forming a shipping pallet for the customer. 2. A picking system for forming a shipping pallet for a customer in which different types of products are stacked in multiple layers from a plurality of types of product pallets in which a single type of packed product is stacked in multiple layers, A depalletizer that divides a product in units of layers from a product pallet, and a palletizer that places the products in units of layers divided by the depalletizer on a product pallet. A first step of dividing into commodity pallets in units of layers, a plurality of accumulation conveyors for accumulating the commodity pallets divided in units of layer in the first step for each product type, and different kinds of commodity pallets on these accumulation conveyors A multi-faced mix face palletizer, which stacks different types of product pallets to form a shipping pallet for customers Picking system being characterized in that a degree. 3. A picking system for forming a shipping pallet for a customer in which products of different types are stacked in layers from a plurality of types of product pallets in which packed single-type products are stacked in layers. A depalletizer that divides commodities from a product pallet in layers, a palletizer that places commodities in units of layers that are divided by the depalletizer on a product pallet, and a face that laminates a product pallet on which commodities are placed by the palletizer. A first step of stacking product pallets, each of which includes a palletizer, and a plurality of product pallets each having a product divided in units of layers based on a work plan in which orders of a plurality of customers are organized; A plurality of storage conveyors for storing product pallets for each product type, and the multilayer product pallets stored on these storage conveyors are palletized. And a mixed face palletizer that stacks different types of product pallets divided by the face unit palletizer in multiple layers, and forms a shipping pallet for customers by stacking different types of product pallets. A picking system, comprising: 4. The method according to claim 1, wherein in the first step, when commodities on a commodity pallet are divided into layers, unnecessary commodities on a shipping pallet are separated into cases and transported to a case automatic warehouse. Item 4. The picking system according to any one of Items 1, 2 and 3. 5. A case palletizer for stacking commodities in case units in the second step, and when stacking different kinds of product pallets in multiple layers in the second step, the case palletizer corresponds to an order quantity equal to or smaller than the layer unit. The picking system according to claim 1, wherein the cases are stacked by a case palletizer. 6. A pallet storage shelf having a plurality of shelves instead of a storage conveyor or a storage unit and a face unit depalletizer in the second step, and a pallet transfer device for putting product pallets into and out of the pallet storage shelf. 6. The picking system according to claim 2, wherein the picking system is provided.