JP5776936B2 - Article storage facility and article stacking method in article storage facility - Google Patents

Description

The present invention includes a stacking unit for stacking articles on a pallet in a stacked state, and a plurality of storage units for mounting and supporting the pallet, under a setting allowable condition that is not more than a set upper limit height and not more than a set upper limit weight. Storage shelves arranged side by side, and transporting the pallet to store the pallet on which articles are stacked in the stacking unit, and to transport the pallet stored in the storage unit Means and control means for controlling the operation of the transport means,
The transporting means is an article mounting body that can be driven back and forth in a retracted state in which it retracts outward from the storage part and a protruding state in which the storage part protrudes, and can be driven up and down, and the pallet is stored in the storage part. Configured to perform a lowering process stored in the storage unit and a scooping process for removing the pallet stored in the storage unit,
The storage portion is configured to place and support both end portions of the pallet with a pair of left and right support bodies arranged in parallel in a state in which the article placement body in the protruding state is spaced vertically.
When the control means performs the lowering process, the article mounting body protrudes into the protruding state at a reference height for lowering than the pair of left and right supports, and then the pair of left and right supports. The article mounting body is lowered to a lower target height for lowering, and then the operation of the conveying means is controlled and the scooping process is performed in order to retract the article mounting body to the retracted state. Sometimes, the article mounting body is protruded in the protruding state at a scooping reference height corresponding to the lowering target height, and then the scooping target height corresponding to the lowering reference height is An article storage facility configured to control the operation of the conveying means so as to raise the article placement body and then retract the article placement body to the retracted state, and an article in the article storage facility Regarding the loading method

When storing articles in an article storage facility having a storage shelf in which a plurality of storage units for placing and supporting the pallets are arranged, the articles are stacked on the pallet at the stacking unit. The pallet is transported by transporting means such as a stacker crane and stored in the storage unit (see, for example, Patent Document 1).
Incidentally, in Patent Document 1, it is exemplified that containers as articles are stacked on a pallet.

  The transport means such as a stacker crane includes an article mounting body that can be driven back and forth in a retracted state that retreats outward from the storage unit and a protruding state that protrudes into the storage unit, and can be driven up and down, and the pallet is stored in the storage unit. The left and right sides are arranged side by side in a state in which the storage unit is spaced apart from each other so that the protruding article mounting body passes vertically. A pair of supports is configured to place and support both ends of the pallet.

  Then, when the control means for controlling the operation of the conveying means performs the lowering process, the article mounting body protrudes into a protruding state at a reference height for lowering than the pair of left and right supports, and then the left and right pair When the article mounting body is lowered to a lower target height for lowering than the support body, and then the operation of the conveying means is controlled and the scooping process is performed in order to retract the article mounting body to the retracted state, The article mounting body protrudes into a protruding state at a scooping reference height corresponding to the lowering target height, and then the article mounting body is raised to a scooping target height corresponding to the lowering reference height. Thereafter, the operation of the conveying means is controlled so that the article mounting body is retracted to the retracted state (see, for example, Patent Document 2).

Although not described in Patent Document 1 and Patent Document 2, when an article is stacked on a pallet, the article is placed on the pallet under a setting allowable condition that is not more than a set upper limit height and not more than a set upper limit weight. Packing in a stacked state will be performed.
That is, a set upper limit weight for loading articles on the pallet is determined based on the load resistance of the storage shelf, the load resistance of the pallet, and the like.
Further, when performing the lowering process or the scooping process, the article placement body having the target height for lowering and the reference height for scooping is set to a set accommodation distance (for example, 15 mm) from the upper surface of the article stored in the lower storage unit. ) The set upper limit height when the article is stacked on the pallet is determined so as to be in a state of being separated from each other.

  In other words, generally, as illustrated in Patent Document 2, a column set composed of a pair of columns arranged in the longitudinal direction of the shelf of the storage shelf is erected on the floor surface side by side in the horizontal direction of the shelf of the storage shelf. In addition, each of the column assemblies is provided with a support body arranged side by side in a vertical direction with the support protruding in a cantilevered manner in the width direction of the shelf, and between the columns arranged adjacent to each other in the width direction of the shelf, the storage unit The storage shelves are configured in such a form that is arranged in a vertically aligned state.

  Then, with respect to the storage unit above the storage unit storing the pallets on which the pallets are stacked so that the distance between adjacent support bodies arranged in the vertical direction is the set upper limit height, When the scooping process is performed, the article placement body having the target height for dropping and the reference height for scooping is in a state of being separated from the upper surface of the article stored in the lower storage unit by a set accommodation distance (for example, 25 mm) or more. Even if there is a slight shift in the stopping position of the article mounting body relative to the target height for lowering and the reference height for scooping or the article mounting body vibrates up and down, Occurrence of troubles such as contact of an object with an article is avoided.

Also, when the pallet is stored in the storage unit, the left and right ends are placed and supported by the left and right supports, so the portion located between the left and right supports is the weight of the stacked article. The amount of bending on the lower side is configured to be within an allowable limit (for example, within 10 mm) when an article is stacked at a set upper limit weight or less.
Further, since it is necessary to provide a margin of about 20 mm between the article placing body having the target height for lowering and the reference height for scooping and the lower surface of the pallet placed on the support, the target height for lowering is set. The height and the reference height for scooping are determined in consideration of the amount of bending on the lower side of the pallet. As a result, the interval between adjacent support members arranged in the vertical direction is the lower side of the pallet. It is determined in consideration of the amount of deflection.

  For example, a state where the article mounting body is projected into the storage portion at the target height for lowering for the lowering process will be described as an example. As shown in FIG. The distance L1 between the pallet is the thickness L5 of the pallet stored in the lower storage unit, the set upper limit height L6 corresponding to the maximum height of the articles stacked on the pallet, the upper surface of the article and the article placement A set accommodation distance L3, which is a distance from the lower surface of the mounting body, a thickness L4 of the article mounting body, and a separation distance L2 between the upper surface of the article mounting body and the upper surface of the support of the storage unit to be stored Value. And the separation distance L2 is a margin amount between the amount of downward deflection of the pallet and the article placement body of the target height for lowering and the reference height for scooping and the lower surface of the pallet placed on the support. The added value.

JP-A-5-262407 JP 2000-229706 A

  As described above, if the pallet used in the article storage facility is stacked so that the weight is less than the set upper limit weight in the set allowable conditions, the amount of deflection on the lower side is within the allowable limit. Even if the articles are stacked with the set upper limit weight in the set allowable conditions, it may be desired to use a pallet whose deflection amount on the lower side exceeds the allowable limit.

  For example, when installing an article storage facility, there may be a pallet that has been in use at the installation location. In such a case, the initial cost for installing the article storage facility is reduced. In order to achieve this, pallets that have been used for a long time will be used as pallets to be stored in storage shelves. In some cases, the amount of deflection on the lower side may exceed an allowable limit.

  Therefore, as a pallet used for an article storage facility, if an article is stacked so as to be equal to or less than a set upper limit weight in the set allowable condition, a pallet in which the lower side deflection amount is within an allowable limit (hereinafter referred to as a difficultly bent pallet). And a pallet (hereinafter abbreviated as an easily-flexible pallet) in which the amount of deflection on the lower side exceeds the allowable limit even if the article is stacked with the set upper limit weight in the set allowable condition. .

And if an article is simply stacked on the easy deflection pallet so as to be equal to or less than the set upper limit weight in the setting allowable condition, an allowable limit (for example, 10 mm) is set such that the amount of bending on the lower side becomes, for example, 30 mm. There will be a case of exceeding.
In such a case, the target height for lowering in the lowering process and the reference height for scooping in the scooping process are determined based on the maximum value of the downward deflection amount of the easy-flexible pallet, and adjusted accordingly. It can be considered that the storage shelf is configured in a form in which the interval between adjacent support bodies arranged in the vertical direction is determined.

  By the way, the amount of downward deflection of the easy-flexible pallet becomes maximum when the article is loaded on the easy-flexible pallet with the set upper limit weight in the setting allowable conditions, and the target height and scooping for lowering. The standard height for use is determined based on the maximum value of the downward deflection of the flexible pallet. The state in which the flexible pallet with the maximum downward deflection is supported by the support of the storage unit , It means that the target height for lowering and the reference height for scooping are determined at a height located below the lower surface of the pallet by a margin interval (for example, 15 mm).

  However, the target height for lowering and the reference height for scooping are determined based on the maximum value of the downward deflection of the easy-flexible pallet, and accordingly, the distance between adjacent support members arranged in the vertical direction is determined. When the storage shelf is configured in a predetermined form, the interval between adjacent support bodies arranged in the vertical direction is larger than that in the case of configuring the storage shelf in view of the amount of bending of the difficult-to-flexible pallet. There was a disadvantage that the storage efficiency of the was lowered.

  The present invention has been made in view of the above-described actual situation, and the object thereof is to provide a pallet with an amount of bending on the lower side when an article is stacked with a set upper limit weight and stored in a storage unit within an allowable limit. It is in providing the article storage equipment which can suppress the fall of the storage efficiency of a storage shelf, while using the pallet used and the pallet which exceeds an allowable limit.

The article storage facility according to the present invention includes a stacking unit that stacks articles on a pallet in a stacked state under a setting allowable condition that is not more than a set upper limit height and not more than a set upper limit weight, and a plurality of the pallets that are placed and supported. A storage shelf in which storage units are arranged side by side, and the pallet for storing the pallet on which articles are stacked in the stacking unit are stored in the storage unit, and the pallet stored in the storage unit is unloaded. And a control means for controlling the operation of the transport means,
The transporting means is an article mounting body that can be driven back and forth in a retracted state in which it retracts outward from the storage part and a protruding state in which the storage part protrudes, and can be driven up and down, and the pallet is stored in the storage part. Configured to perform a lowering process stored in the storage unit and a scooping process for removing the pallet stored in the storage unit,
The storage portion is configured to place and support both end portions of the pallet with a pair of left and right support bodies arranged in parallel in a state in which the article placement body in the protruding state is spaced vertically.
When the control means performs the lowering process, the article mounting body protrudes into the protruding state at a reference height for lowering than the pair of left and right supports, and then the pair of left and right supports. The article mounting body is lowered to a lower target height for lowering, and then the operation of the conveying means is controlled and the scooping process is performed in order to retract the article mounting body to the retracted state. Sometimes, the article mounting body is protruded in the protruding state at a scooping reference height corresponding to the lowering target height, and then the scooping target height corresponding to the lowering reference height is It is configured to control the operation of the conveying means to raise the article mounting body and then to retract the article mounting body to the retracted state.
When the article is loaded with the set upper limit weight when the article is loaded with the set upper limit weight as the pallet, the difficult deflection pallet and the article with the set upper limit weight are loaded. And a flexible pallet that exceeds the allowable limit,
When stacking the article on the difficult-to-deflection pallet, the stacking unit stacks the article under the set allowable condition, and when stacking the article on the easy-to-deflection pallet, It is configured to stack articles under the setting allowance condition for an easy deflection pallet that is equal to or less than the upper limit weight for an easy deflection pallet determined to be lower than the set upper limit weight ,
The weight at which the upper limit weight for the easy deflection pallet is within the allowable limit when the easy deflection pallet loaded with the upper limit weight for the easy deflection pallet is stored in the storage portion. It is characterized by being set to .

  That is, as a pallet, when the article is loaded at the set upper limit weight when the article is loaded at the upper limit weight when stored in the storage unit, and the article is loaded at the set upper limit weight, There are easy-deflection pallets that exceed allowable limits.

  And when the stacking part loads the article on the difficult-to-flexible pallet, it stacks the article on the setting allowable condition, and when to stack the article on the easily-flexible pallet, it is below the set upper limit height and from the set upper limit weight. Also, the articles are stacked under the easy-to-flexible pallet setting allowable condition that is equal to or less than the upper limit weight for the easy-flexible pallet determined to be low.

Thus, when stacking articles on the easy-flexible pallet, the stacking part is intended to stack the articles under the easy-flexible pallet setting conditions, so as the upper limit weight for the easy-flexible pallet in the easy-flexible pallet setting conditions, When an article is stacked on the easy-flexible pallet with the upper limit weight for the easy- flexible pallet, the amount of deflection of the easy- flexible pallet can be within the allowable limit described above.

  Therefore, in both the hard-flexible pallet and the easy-flexible pallet, the downward deflection amount when stored in the storage part is within the above-described allowable limit. Since it can be formed in a form suitable for storing a pallet whose deflection amount is within the allowable limit, the storage part provided in the storage shelf is compared with a form suitable for storing a pallet exceeding the allowable limit described above. Thus, a decrease in storage efficiency of the storage shelf can be suppressed.

  In short, according to the first characteristic configuration of the present invention, as a pallet, when the articles are stacked at the set upper limit weight and stored in the storage unit, the lower side deflection amount is within the allowable limit, and the allowable limit. It is possible to provide an article storage facility that can suppress a decrease in the storage efficiency of the storage shelf while using more pallets.

In addition to the first feature configuration, the second feature configuration of the article storage facility of the present invention,
The storage shelves are erected on a floor surface by arranging a column set consisting of a pair of columns arranged in the longitudinal direction of the shelf in the horizontal direction of the shelf of the storage shelf, and the support is attached to the shelf in each of the column sets. The storage unit is arranged in a vertical direction in a state of projecting in a cantilevered direction in the horizontal width direction, and the storage unit is configured to be formed in a state of being aligned in the vertical direction between the column groups arranged adjacent to each other in the horizontal direction of the shelf. ,
In the storage units arranged in the vertical direction, the upper and lower adjacent intervals of the storage units provided in the storage units are arranged such that the vertical distance between the supports is set to the storage unit below the storage unit to be stored. In the case where it is assumed that the stacked pallets are stored without being bent, the amount of downward bending of the article mounting body is set in order to perform the lowering process on the storage unit to be stored. When the pallet that falls within the allowable limit is positioned at the target height for lowering, the article placement body is set to an interval that leaves a set accommodation distance from the upper surface of the article stored in the lower storage section. It is characterized by that.

That is, the storage shelves are configured in a form in which the storage units are arranged in the vertical direction between the column groups arranged adjacent to each other in the shelf width direction.
And the pallet which piled the articles | goods of the setting upper limit height to the storage part under the storage part of the storage object for the space | interval of the up-down direction of the support body which each of the storage part adjacent to the up-down in the storage part arranged in an up-down direction equips In order to perform the lowering process on the storage unit to be stored, the article mounting body is positioned at the target lowering level for the pallet whose downward deflection amount is within the allowable limit. The article placement body is set at an interval away from the set accommodation distance from the upper surface of the article stored in the lower storage section.

  That is, in both the hard-flexible pallet and the easy-flexible pallet, the upper and lower sides of the storage units arranged in the vertical direction are adjacent to each other in view of the fact that the downward deflection amount when stored in the storage unit is within the allowable limit described above. When the pallet loaded with articles of a set upper limit height is stored in the storage unit below the storage target, the vertical interval between the supports provided in each storage unit to be stored is stored in the storage target storage unit. In order to perform the unloading process and the scooping process, when the article mounting body is positioned at the target lowering height and the scooping reference height for the pallet whose downward deflection is within the allowable limit, Since the body is determined to be spaced apart from the set accommodation distance from the upper surface of the article stored in the lower storage unit, the lowering target height and the scooping reference height are set in order to perform the lowering process and the scooping process. Place The article mounting body thus formed is formed in a state in which it is arranged in the vertical direction between the column assemblies arranged adjacent to each other in the width direction of the shelf while avoiding troubles such as contact with the article stored in the lower storage section. The storage part can be provided in a dense state as much as possible, and a decrease in the storage efficiency of the storage shelf can be accurately suppressed while using the hardly-flexible pallet and the easily-flexible pallet as the pallet.

  In short, according to the second characteristic configuration of the present invention, in addition to the function and effect of the first characteristic configuration, the storage portion is formed in a state of being vertically aligned between the column assemblies arranged adjacent to each other in the shelf width direction. In the case where the storage shelf is configured, the article storage facility can be provided which can accurately suppress the decrease in the storage efficiency of the storage shelf.

The article stacking method in the article storage facility according to the present invention includes a stacking unit that stacks articles on a pallet in a stacked state under a setting allowable condition that is not more than a set upper limit height and not more than a set upper limit weight, and the pallet A storage shelf in which a plurality of storage units to be placed and arranged are arranged side by side, and the pallet on which articles are stacked by the stacking unit is stored in the storage unit, and the pallet stored in the storage unit A conveying means for conveying the pallet to carry out, and a control means for controlling the operation of the conveying means;
The transporting means is an article mounting body that can be driven back and forth in a retracted state in which it retracts outward from the storage part and a protruding state in which the storage part protrudes, and can be driven up and down, and the pallet is stored in the storage part. Configured to perform a lowering process stored in the storage unit and a scooping process for removing the pallet stored in the storage unit,
The storage portion is configured to place and support both end portions of the pallet with a pair of left and right support bodies arranged in parallel in a state in which the article placement body in the protruding state is spaced vertically.
When the control means performs the lowering process, the article mounting body protrudes into the protruding state at a reference height for lowering than the pair of left and right supports, and then the pair of left and right supports. The article mounting body is lowered to a lower target height for lowering, and then the operation of the conveying means is controlled and the scooping process is performed in order to retract the article mounting body to the retracted state. Sometimes, the article mounting body is protruded in the protruding state at a scooping reference height corresponding to the lowering target height, and then the scooping target height corresponding to the lowering reference height is An article stacking method in an article storage facility configured to control the operation of the conveying means to raise the article placing body and then to retract the article placing body to the retreated state,
When the article is loaded with the set upper limit weight when the article is loaded with the set upper limit weight as the pallet, the difficult deflection pallet and the article with the set upper limit weight are loaded. And a flexible pallet that exceeds the allowable limit,
In the stacking portion, when stacking articles on the difficult-to-flexible pallet, stacking articles on the setting allowable condition, and when stacking articles on the easily-flexible pallet, the set upper limit height or less and the The items are stacked in a stacked state on the pallet under the setting allowable conditions for the easy-flexible pallet that is lower than the upper-limit weight for the easy-flexible pallet determined to be lower than the set upper limit weight ,
The upper limit weight for the easy deflection pallet is set to a weight such that the amount of downward deflection when the easy deflection pallet loaded with the upper limit weight for the easy deflection pallet is stored in the storage portion is within the allowable limit. Characterized by set points.

  That is, as a pallet, when the article is loaded at the set upper limit weight when the article is loaded at the upper limit weight when stored in the storage unit, and the article is loaded at the set upper limit weight, There are easy-deflection pallets that exceed allowable limits.

  In the stacking unit, when stacking articles on the difficult-to-flexible pallet, stacking articles on the setting allowable condition, and when stacking articles on the easily-flexible pallet, the set upper limit height or less and the set upper limit weight Also, the articles are stacked under the easy-to-flexible pallet setting allowable condition that is equal to or less than the upper limit weight for the easy-flexible pallet determined to be low.

Thus, when stacking articles on the easy-flexible pallet, the stacking part is intended to stack the articles under the easy-flexible pallet setting conditions, so as the upper limit weight for the easy-flexible pallet in the easy-flexible pallet setting conditions, When an article is stacked on the easy-flexible pallet with the upper limit weight for the easy- flexible pallet, the amount of deflection of the easy- flexible pallet can be within the allowable limit described above.

  Therefore, in both the hard-flexible pallet and the easy-flexible pallet, the downward deflection amount when stored in the storage part is within the above-described allowable limit. Since it can be formed in a form suitable for storing a pallet whose deflection amount is within the allowable limit, the storage part provided in the storage shelf is compared with a form suitable for storing a pallet exceeding the allowable limit described above. Thus, a decrease in storage efficiency of the storage shelf can be suppressed.

  In short, according to the article stacking method in the article storage facility of the present invention, as the pallet, when the article is stacked with the set upper limit weight in the setting allowable condition and stored in the storage unit, the downward deflection amount is within the allowable limit. It is possible to provide an article stacking method in an article storage facility that can suppress a decrease in the storage efficiency of the storage shelf while using a pallet that becomes a pallet that exceeds the allowable limit.

Schematic plan view of goods storage facility Side view of storage shelf Schematic perspective view of the loading part Schematic front view showing relationship between pallet and fork stored in storage Block diagram showing control configuration Flow chart showing control operation of loading unit

Next, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a stacking unit D that stacks articles B carried in from the outside in a stacked state on a pallet P, and a plurality of storage units S that support and mount the pallets P on which the articles B are stacked. The storage shelf 1 provided, the article unloading part E for taking out the article B from the pallet P and carrying it out to the outside, the pallet P on which the article B is stacked by the loading part D is stored in the storage part S and the storage part S The pallet P stored in the pallet P is transported to the article unloading unit E. The pallet P is transported to the pallet P, and the pallet processing unit G for stacking and stacking the empty pallets P is installed and loaded. The article storage facility is configured to store the articles B stacked on the pallet P in the storage section S, take out the articles B stacked on the pallet P from the pallet P, and carry them out to the outside.

A pair of left and right storage shelves 1 are installed with an interval in the state in which the article loading / unloading directions are opposed to each other, and a pair of left and right storage conveyors 2 are installed beside the pair of left and right storage shelves 1. .
A stacker crane K is provided which is guided by a traveling rail 3 installed on the floor surface between the pair of left and right storage shelves 1 and is movable along the lateral width direction of the storage shelves 1. A transport carriage J is provided that can travel along a traveling line 4 that passes through the loading / unloading conveyor 2, the article unloading section E, and the pallet processing section G.
By the way, in the present embodiment, the pallet P is used to store the pallet P on which the article B is stacked in the loading unit D in the storage unit S and to carry the pallet P stored in the storage unit S to the article unloading unit E. The transport means F for transporting the vehicle is configured with the stacker crane K and the transport carriage J as main parts.

  As shown in FIG. 2, the stacker crane K is in a retracted state in which the stacker crane K is retracted to the outside of the storage unit S and the storage unit S is moved up and down along the lift mast 6 erected from the traveling carriage 5. A fork 8 which can be driven out and retracted in a protruding state protruding inward is provided as an article mounting body, and a lowering process for storing the pallet P in the storage portion S by the lifting and lowering operation of the fork 8 and A scooping process for taking out the pallet P stored in the storage unit is performed.

That is, the stacker crane K performs a warehousing operation for storing the pallet P received in the loading / unloading conveyor 2 in the storage portion S and a warehousing operation for unloading the pallet P stored in the storage portion S to the loading / unloading conveyor 2. In addition, when the warehousing operation is performed, the unloading process is performed, and when the warehousing operation is performed, the crawl process is performed.
The stacker crane K operates the fork 8 in the same manner as the scooping process when unloading the pallet P from the loading / unloading conveyor 2 during the loading operation, and also when unloading the pallet P from the loading / unloading conveyor 2 during the loading operation. The fork 8 is operated in the same manner as the above-described lowering process.

As shown in FIG. 1 and FIG. 2, both ends of the pallet P are stored in a pair of left and right support bodies 10 in which the storage portion S of the storage shelf 1 is juxtaposed in a state in which the protruding fork 8 passes vertically. It is comprised so that a part may be mounted and supported.
That is, each of the pair of left and right storage shelves 1 has a pair of front and rear columns 9 and 9 spaced apart in the longitudinal direction of the shelf, arranged side by side along the width direction of the shelf, The support members 10 are arranged in a vertical direction in a state of protruding in a cantilevered manner in the width direction of the shelf, and the storage portions S are arranged in the vertical direction between pairs of columns arranged adjacent to each other in the width direction of the shelf. It is comprised so that it may form.

  Incidentally, the pair of front and rear columns 9 and 9 constituting the column assembly are assembled in advance in an integrated state by a horizontal material or a lattice material, and the column assembly arranged in the width direction of the shelf is a rear portion of the storage shelf 1. It is assembled in an integrated state by a horizontal material, a brace material or the like installed at a location corresponding to

  When the crane control unit KC (see FIG. 5) mounted on the stacker crane K or installed on the ground performs the above-described lowering process, the fork 8 has a lower reference height than the pair of left and right supports 10. , Then the fork 8 is lowered to a lower target height for lowering than the pair of left and right supports 10, and then the operation of the stacker crane K is controlled so that the fork 8 is retracted. Further, when performing the above-described scooping process, the fork 8 is protruded into a projecting state at a scooping reference height corresponding to the lowering target height, and then the scooping target corresponding to the lowering reference height. The operation of the stacker crane K is controlled so that the fork 8 is raised to a height and then the fork 8 is retracted to the retracted state.

  The crane control unit KC detects various sensors such as a travel position detection sensor for detecting the travel position of the travel carriage 5 traveling on the travel rail 3 and a lift position detection sensor for detecting the lift position of the lift base 7. Although the operation of the stacker crane K is controlled based on the information, detailed description thereof is omitted in this document.

  The loading unit D loads the article B, which is carried by the loading vehicle 11 such as a hand cart, on the pallet P in a stacked state under a set allowable condition that is not more than the set upper limit height and not more than the set upper limit weight. As shown in FIG. 3, the pallet P that receives the empty pallet P that is transported by the transport carriage J and is stacked with the articles B in the stacked state is transported as shown in FIG. 3. A pair of loading work conveyors 12 to be sent to J and a palletizing robot M for loading an article B carried in the loading vehicle 11 onto a pallet P placed on the loading work conveyor 12 are provided. .

The articles B to be carried are stacked on the transport pallet Q in a stacked state, and the transport pallet Q is configured using an IC tag or the like, and an article information storage unit 13 for storing article information. The article information storage unit 13 includes identification information of the article B, article specification information indicating the size and weight of the article B, and the number of articles indicating the number of articles stacked on the transport pallet Q. Article information such as information is stored.
And the loading part D is equipped with a portable article information reading part 14 for reading the article information stored in the article information storage part 13, and an operator located in the loading part D By reading the article information stored in the article information storage unit 13 using the article information reading unit 14, the loading management controller HD (see FIG. 5) is less than the set upper limit height and less than the set upper limit weight. The palletizing robot M is operated so that the article B is stacked on the pallet P in a set allowable condition.

In other words, the loading management controller HD stores in advance a loading pattern for loading the article B under the setting allowable condition for each of the plurality of types of articles B to be carried in, and is read by the article information reading unit 14. Based on the received article information, the loading pattern of the article B to be stacked is determined, and the palletizing robot M is operated.
In order to operate the palletizing robot M, information of various sensors such as a sensor for detecting the position of the article B placed on the transfer pallet Q is also used, but their specific configuration is well known. Therefore, the description thereof is omitted in this document.

  The above-mentioned stacking pattern is set as a pattern in which the set number of articles B are arranged in the horizontal direction for each stacking stage, and is set as a pattern for stacking on a plurality of setting stages. Is set as a pattern that allows a small number of articles B to be positioned.

  In addition, when stacking a plurality of articles B that are carried in, when they cannot be stacked on one pallet P, they are distributed and stacked on a plurality of pallets P. The maximum number of articles B satisfying the setting permissible condition is loaded on the pallet P with the placement order earlier, and the number of articles B less than the maximum number satisfying the setup permissible condition is placed on the pallet P with the last placement order. To be stacked.

  Incidentally, the reason why the articles B stacked on the transport pallet Q are reloaded into the pallet P and the pallet P is stored in the storage part S is that the transport pallet Q is weaker than the pallet P and stored. For example, it is not suitable for storing in the part S, and the size of the transport pallet Q is not suitable for storing in the storage part S.

  An empty pallet P is sequentially carried into the pair of loading work conveyors 12 by the transport carriage J, and the pallet P placed on one of the pair of loading work conveyors 12. When the loading of the article B is finished, the loading management controller HD palletizes the loading of the article B on the pallet P placed on the other loading work conveyor 12. The operation of the robot M is configured to be controlled.

  In addition, the pallet P on which the loading of the article B has been completed is taken out from the loading conveyor 12 to the transport carriage J and is transported to the loading / unloading conveyor 2 of the storage shelf 1 by the transport carriage J. The empty pallet P taken out from the pallet processing section G is supplied to the loading work conveyor 12 from which the pallet P is taken out by the transport carriage J.

Incidentally, in the present embodiment, the setting upper limit height in the setting permissible condition is, for example, 1350 mm, and the setting upper limit weight is 500 kg.
Further, the article B is box-shaped, and as described above, the article B is stacked on the pallet P in a stacked state in a state where a predetermined number of articles B are arranged vertically and horizontally in each stage.

  As shown in FIG. 3, the palletizing robot M includes a columnar base frame 15 erected on the floor, a bending / extending arm 16 that can be swiveled and moved up / down with respect to the base frame 15, and its bending / extension An arm 16 is provided with an article holding unit 17 that is attached to the tip of the arm 16 and holds the article B by suction. The article B is loaded on the pallet P while being held by the article holding unit 17 one by one. It is configured to be attached.

  As shown in FIG. 1, the article carry-out section E is configured to carry the article B taken out from the pallet P to the outside by the carry-out conveyor 18. A pair of unloading conveyors 19 for receiving the pallet P in an article stacking state conveyed by J and sending an empty pallet P from which an article B has been taken out to the conveyance carriage J and the pallet P are loaded. A depalletizing robot N for transferring the article B onto the carry-out conveyor 18 is provided.

  The pair of carry-out work conveyors 19 is sequentially loaded with the pallets P in the article loading state by the transport carriage J, and the pallets placed on one of the pair of carry-out work conveyors 19 When the take-out of the article B from P is completed, the take-out management controller HE (see FIG. 5) depalletizes to start taking out the article B from the pallet P placed on the other carry-out work conveyor 19. The operation of the robot N is configured to be controlled.

  Also, the empty pallet P from which the article B has been taken out is taken out from the carry-out conveyor 19 to the transport carriage J, is transported to the pallet processing section G by the transport carriage J, and is unloaded from the storage shelf 1. The pallet P in the article stacking state is configured to be supplied to the carry-out conveyor 19 from which the empty pallet P is taken out by the transport carriage J.

  Although not described in detail, the depalletizing robot N is configured in the same manner as the palletizing robot M, and holds the articles B stacked on the pallet P one by one while taking them out to the carry-out conveyor 18. It is configured.

  The pallet processing unit G that performs stacking processing and stacking processing of the empty pallets P includes a stacking processing unit Gd that stacks the empty pallets P supplied from the transport carriage J, and an empty pallet that is stacked. A leveling processing unit Gb that holds the pallet P and supplies empty pallets P one by one to the transport carriage J is provided.

The pallet P that has been emptied in the article unloading unit E is sequentially supplied to the stacking processing unit Gd in the pallet processing unit G. When the number of stacked pallets P reaches the set number of stacks. The stacked pallets P are supplied to the loading / unloading conveyor 2 of the storage shelf 1 by the transport carriage J and stored in the storage shelf 1 (see FIG. 2).
Incidentally, in the state where the number of stacked pallets P reaches the set number, the height of the stacked pallets P is higher than the sum of the set upper limit height and the thickness of the pallet P in the setting allowable conditions. Of course, it becomes a small height.

  The pallet processing unit Gb in the pallet processing unit G is sequentially supplied with the stacked pallets P stored in the storage shelf 1, and the empty pallet P taken out one by one from the stacking processing unit. The conveyor cart J is configured to be transported to the carry-in / out conveyor of the loading unit D.

  In addition, since the carrying-in operation of the article B and the carrying-out operation of the article B are normally performed in different time zones, the pallet processing unit G is equipped. Since the specific configurations of the stacking processing unit Gd and the stacked stacking processing unit Gb are well known, detailed description thereof will be omitted in this document.

As shown in FIG. 1, the transport carriage J is configured to include a pallet transport conveyor 20 configured using a chain conveyor or the like at the top.
And the pallet conveyance position with respect to the loading / unloading conveyor 2 in the storage shelf 1, the pallet conveyance position with respect to the loading work conveyor 12 in the loading part D, and the pallet conveyance position with respect to the unloading work conveyor 19 in the article unloading part E In addition, in order to carry the pallet P while traveling to the pallet carrying position for the stacking processing unit Gd and the pallet carrying position for the stacking separation processing unit Gb in the pallet processing unit G, the cart management controller HJ A work command is instructed to a cart control unit JC mounted on J, and the cart control unit JC is configured to control the operation of the transport cart J based on the commanded work command (see FIG. 6).

  That is, as shown in FIG. 5, a trolley management controller HJ, a storage shelf management controller HT, a loading management controller HD, a take-out management controller HE, and a pallet processing controller for managing the operation of the pallet processing section G The HG is communicably connected, and the trolley management controller HJ is configured to transport the pallet P by operating the transport trolley J based on command information from another controller. Yes.

  As an example, the conveyance of the pallet P to the stacking unit D will be described. When the stacking of the article B on the empty pallet P is completed, the loading management controller HD loads the article B in a stacked state. The unloading request information for requesting unloading of the attached pallet P in the article stacking state is output, and the cart management controller HJ transports the pallet P in the article stacking state to the loading / unloading conveyor 2 of the storage shelf 1. Therefore, a conveyance command is issued to the carriage control unit JC of the carriage truck J, and in addition, the storage rack management controller stores the pallet P in the article stacking state in the storage rack 1 so that the stacker crane K A conveyance command is commanded to the crane control unit KC.

  Also, the trolley management controller receives the empty pallet P from the spread processing unit Gd of the pallet processing unit G, and the empty pallet is placed on the loading work conveyor 12 from which the pallet P is unloaded in the loading unit D. In order to supply P, it is configured to instruct a transport command to the cart control unit JC of the transport cart J.

  By the way, in the present embodiment, the pallet P is used to store the pallet P on which the article B is stacked in the loading unit D in the storage unit S and to carry the pallet P stored in the storage unit S to the article unloading unit E. The transport means F for transporting the vehicle is composed mainly of the stacker crane K and the transport carriage J. The control means H for controlling the operation of the transport means F is a controller for truck management HJ, storage shelf management. The controller HT, the cart control unit JC of the transport cart J, and the crane control unit KC of the stacker crane K are configured as main parts.

The basic configuration of the present embodiment is as described above, and the characteristic configuration of the present embodiment will be described below.
In the present embodiment, when the article B is loaded with a set upper limit weight (for example, 500 kg) as the pallet P in the storage portion S of the storage shelf 1 with a set upper limit weight (for example, 500 kg), the allowable amount When the article B is stacked with a set upper limit weight, there is an easily-flexible pallet Py exceeding the allowable limit (for example, 10 mm).

  The hard-flexible pallet Pn and the easy-flexible pallet Py are used while being stacked in a state of being mixed in the stacking processing part Gd of the pallet processing part G.

The pallet P stores pallet information such as identification information for identifying each pallet P, start date information indicating a use start date, and pallet type information indicating whether the pallet Pn is a hard-flexible pallet Pn or an easy-flexible pallet Py. A pallet information storage unit 21 is provided (see FIG. 3). As shown in FIG. 1, the pallet information storage unit 21 of the pallet P has a pallet information storage unit 21 at a location corresponding to the loading work conveyor 12 of the stacking unit D. A pallet information reading unit 22 for reading stored pallet information is provided.
The pallet information storage unit 21 is configured using an IC tag or the like, and the pallet information reading unit 22 is configured using a tag reader or the like.

  Incidentally, a pallet information reading unit 22 that reads pallet information stored in the pallet information storage unit 21 of the pallet P is provided at a location corresponding to the loading / unloading conveyor 2 of the storage shelf 1, and a storage shelf management controller The HT is configured to be stored in the storage shelf 1 while identifying the pallet P to be received.

  Based on the reading information of the pallet information reading unit 22, the loading management controller HD determines whether the pallet P on which the article B is loaded is the difficult-to-flexible pallet Pn or the easy-to-flexible pallet Py. In the case of the flexible pallet Pn, the article B is stacked under the set allowable condition described above, that is, the set allowable condition that is not more than the set upper limit height and not more than the set upper limit weight, and is the easily bent pallet Py. In order to load the article B under the setting allowance condition for the easy deflection pallet that is not more than the set upper limit height and lower than the upper limit weight for the easy deflection pallet determined to be lower than the set upper limit weight, The palletizing robot M is configured to operate.

And the upper limit weight for easy-flexible pallets is a weight (e.g., within the allowable limit (e.g., 10 mm) in the hard-flexible pallet Pn when the easy-flexible pallet Py is stored in the storage portion S). 300 kg).
Therefore, when the pallet P on which the article B is stacked in the stacking portion D is stored in the storage portion S, the amount of bending downward is an allowable limit in both the hard-flexible pallet Pn and the easy-flexible pallet Py. (For example, 10 mm).

  As described above, when the pallet P on which the article B is stacked in the stacking portion D is stored in the storage portion S, the downward deflection amount is allowable in both the difficult-flexible pallet Pn and the easy-flexible pallet Py. Since it is within the limit (for example, 10 mm), the vertical interval of the support 10 provided in each of the storage units S adjacent in the vertical direction in the storage units S arranged in the vertical direction of the storage shelf 1 is the storage unit to be stored. In the state where the pallet P loaded with the article B having the set upper limit height is stored in the storage section below the storage section, the fork 8 is bent downward to perform the lowering process on the storage section to be stored. When the fork 8 is positioned at the target lowering height for the pallet P that falls within the allowable limit, the fork 8 is set at an interval that leaves the set accommodation distance from the upper surface of the article B stored in the lower storage portion Sh. .

The state in which the forks 8 are protruded into the storage portion S at the target height for lowering for the lowering process will be described as an example. As shown in FIG. The distance L1 between the thicknesses is a thickness L5 of the pallet P stored in the lower storage section S, a set upper limit height L6 corresponding to the maximum height of the articles B stacked on the pallet P, and the article B A set accommodation distance L3 which is a distance between the upper surface of the fork 8 and the lower surface of the fork 8, a thickness L4 of the fork 8, and a separation distance L2 between the upper surface of the fork 8 and the upper surface of the support 10 of the storage unit S to be stored. The added value.
The separation distance L2 is a value obtained by adding the amount of bending downward of the pallet P and a margin interval between the fork 8 having the reference height for scooping and the lower surface of the pallet P placed on the support 10. .

  Therefore, in the state where the downward deflection amount of the pallet P stored in the storage portion S is within the allowable limit of the difficult-to-flexible pallet Pn (for example, within 10 mm), the distance between adjacent support bodies 10 arranged in the vertical direction Since L1 is determined, the storage section S of the storage shelf 1 can be formed in a closely lined state between adjacent column sets, and the pallet P can be efficiently stored in the storage shelf 1. .

Incidentally, the above-mentioned separation distance L2 corresponds to the scooping reference height or the lowering target height of the fork 8, and is set to 30 mm, for example. Further, the set accommodation distance L3 is set to 25 mm, for example.
In FIG. 4, L7 indicates a separation distance between the lower surface of the pallet P and the upper surface of the support body 10 in a state where the fork 8 is positioned at the reference height for lowering or the target height for scooping. This corresponds to the reference height for lowering the fork 8 and the target height for scooping, and is set to 60 mm, for example.

Next, the loading process executed by the loading management controller HD will be described based on the flowchart of FIG.
First, based on the read information of the article information reading unit 14, information of the article B to be stacked next (type, quantity, etc. of the article B) is set (# 1).
In addition, since the reading operation with respect to the article information storage unit 13 by the article information reading unit 14 is performed by an operator, when the reading operation with respect to the article information storage unit 13 by the article information reading unit 14 is performed in advance, The contents are stored, the stored contents are read out, and the information (article B type, quantity, etc.) of the article B to be stacked next is set.

Next, the storage information of the pallet information storage unit 21 of the empty pallet P placed on the stacking work conveyor 12 that is the current work out of the pair of loading work conveyors 12 is stored as pallet information. Reading is performed by the reading unit 22, and based on the reading information, it is determined whether or not the pallet P to be stacked is a difficult-to-deflection pallet Pn (# 2).
If the pallet Pn is difficult to be set, a setting allowable condition is set as the loading condition for the article B (# 3). If the pallet Pn is not difficult, that is, if the pallet Py is easy, Sets the setting allowance condition for the easy deflection pallet as the loading condition of the article B (# 4).

After setting the loading condition of the article B in # 3 and # 4, a loading pattern for loading the article B on the pallet P to be loaded is set (# 5).
In other words, the loading management controller HD stores in advance a loading pattern for loading the article B with the setting allowable condition and the setting allowable condition for the easy-flexible pallet for each of the plural types of articles B to be carried in, Based on the article information read by the article information reading unit 14, the loading pattern of the article B to be loaded is selected and the loading pattern is set.

The stacking pattern includes information indicating the number of items in the vertical and horizontal directions, information indicating the maximum number to be stacked, and information indicating the loading procedure of the item B when the items B are arranged vertically and horizontally in each step. It is created in a form that includes.
By the way, the information indicating the loading procedure of the article B is information indicating the position and the order of placing the article B on the pallet P to be stacked.

After setting the stacking pattern in # 6, the palletizing robot M is operated to execute a robot operation process for sequentially stacking the articles B on the pallets P to be stacked (# 6).
In this flowchart, this robot operation process is a process of stacking one article B along the stacking pattern.

After executing the robot operation process of # 6, it is determined whether or not all the loadings of the articles B that are currently being stacked are completed (# 7). It will move to processing.
If it is determined in # 7 that the loading of all articles B has not been completed, the pallet P is currently full as a target for loading, that is, the loading pattern for one pallet P is completed. Is determined (# 8), and if it is determined that the pallet P is not full, the robot operation process of # 6 is executed.

  If it is determined in # 8 that the pallet P is full, the process proceeds to # 2, and the empty pallet P placed on the stacking work conveyor 12 to be operated next. The storage information of the pallet information storage unit 21 is read by the pallet information reading unit 22, and based on the read information, it is determined whether or not the pallet P to be stacked is a difficult-to-deflection pallet Pn. Will be repeated.

  Note that the pallet P on which the articles B are stacked is transported to the loading / unloading conveyor 2 by the transport carriage J and stored in the storage shelf 1 as described above, and the pallet P is unloaded. As described above, the empty pallet P stored in the pallet processing unit G is transported by the transport cart J to the loading conveyor 12.

[Another embodiment]
Next, another embodiment is listed.
(1) In the above-described embodiment, the case where the stacking unit is configured to stack articles using a palletizing robot is illustrated. However, in the stacking unit, an operator stacks articles. May be.
In this case, the loading unit may be equipped with display means for displaying information indicating the loading pattern to the worker.

(2) In the above embodiment, the case where the pallet stacked with the article in the stacking unit is transported to the storage conveyor of the storage shelf by the transport cart and stored in the storage shelf is illustrated. The section may be implemented in such a manner that articles are stacked on a pallet placed on the loading / unloading conveyor.
In this case, the stacker crane is used as the transport means for transporting the pallet for storing the pallet on which the articles are stacked in the stacking unit and storing the pallet stored in the storage unit to the article unloading unit E. Will be.

(3) In the above embodiment, when the upper limit weight for the easy deflection pallet in the setting allowance condition for the easy deflection pallet is set to a weight that is not more than the allowable limit, that is, if the article is stacked with the upper limit weight for the easy deflection pallet, Although the case where the amount of deflection to the lower side of the flexible pallet is an allowable limit is illustrated, the upper limit weight for the easy flexible pallet can be reduced to the lower side of the easy flexible pallet by stacking articles with the upper limit weight for the flexible pallet. You may set to the weight from which a deflection amount becomes smaller than an allowable limit.

(4) In the above embodiment, the case where the palletizing robot equipped with the bending arm is provided in the stacking portion is exemplified. However, the traveling carriage that runs vertically and horizontally is provided on the ceiling side, and the article is held with respect to the traveling carriage. As an article stacking device equipped in the stacking unit, such as mounting an article transfer robot equipped with a section that can freely move up and down to allow loading of articles, various forms are provided. Things can be used.

(5) In the above embodiment, the case where the storage shelf is configured in a form in which the support is provided in the column set arranged in the shelf width direction is exemplified, but various configurations can be applied to the configuration of the storage shelf, In short, it is only necessary that the storage portion is configured to place and support both end portions of the pallet with a pair of left and right support bodies.

DESCRIPTION OF SYMBOLS 1 Storage shelf 8 Article mounting body 9 Pillar 10 Support body B Article D Stacking part F Conveying means H Control means L1 Space | interval L3 Set accommodation distance P Pallet S Storage part

Claims (3)

A loading unit for stacking articles on a pallet in a stacked state and a plurality of storage units for placing and supporting the pallet are arranged side by side under a setting allowable condition that is not more than a set upper limit height and not more than a set upper limit weight. A storage shelf; and a transport unit that stores the pallet on which articles are stacked in the stacking unit in the storage unit, and transports the pallet to unload the pallet stored in the storage unit; Control means for controlling the operation of the conveying means,
The transporting means is an article mounting body that can be driven back and forth in a retracted state in which it retracts outward from the storage part and a protruding state in which the storage part protrudes, and can be driven up and down, and the pallet is stored in the storage part. Configured to perform a lowering process stored in the storage unit and a scooping process for removing the pallet stored in the storage unit,
The storage portion is configured to place and support both end portions of the pallet with a pair of left and right support bodies arranged in parallel in a state in which the article placement body in the protruding state is spaced vertically.
When the control means performs the lowering process, the article mounting body protrudes into the protruding state at a reference height for lowering than the pair of left and right supports, and then the pair of left and right supports. The article mounting body is lowered to a lower target height for lowering, and then the operation of the conveying means is controlled and the scooping process is performed in order to retract the article mounting body to the retracted state. Sometimes, the article mounting body is protruded in the protruding state at a scooping reference height corresponding to the lowering target height, and then the scooping target height corresponding to the lowering reference height is An article storage facility configured to control the operation of the conveying means to raise the article placement body and then to retract the article placement body to the retreated state,
When the article is loaded with the set upper limit weight when the article is loaded with the set upper limit weight as the pallet, the difficult deflection pallet and the article with the set upper limit weight are loaded. And a flexible pallet that exceeds the allowable limit,
When stacking the article on the difficult-to-deflection pallet, the stacking unit stacks the article under the set allowable condition, and when stacking the article on the easy-to-deflection pallet, It is configured to stack articles under the setting allowance condition for an easy deflection pallet that is equal to or less than the upper limit weight for an easy deflection pallet determined to be lower than the set upper limit weight,
The weight at which the upper limit weight for the easy deflection pallet is within the allowable limit when the easy deflection pallet loaded with the upper limit weight for the easy deflection pallet is stored in the storage portion. Goods storage facilities set up in The storage shelves are erected on a floor surface by arranging a column set consisting of a pair of columns arranged in the longitudinal direction of the shelf in the horizontal direction of the shelf of the storage shelf, and the support is attached to the shelf in each of the column sets. The storage unit is arranged in a vertical direction in a state of projecting in a cantilevered direction in the horizontal width direction, and the storage unit is configured to be formed in a state of being aligned in the vertical direction between the column groups arranged adjacent to each other in the horizontal direction of the shelf. ,
In the storage units arranged in the vertical direction, the upper and lower adjacent intervals of the storage units provided in the storage units are arranged such that the vertical distance between the supports is set to the storage unit below the storage unit to be stored. In the case where it is assumed that the stacked pallets are stored without being bent, the amount of downward bending of the article mounting body is set in order to perform the lowering process on the storage unit to be stored. When the pallet that falls within the allowable limit is positioned at the target height for lowering, the article placement body is set to an interval that leaves a set accommodation distance from the upper surface of the article stored in the lower storage section. The article storage facility according to claim 1. A loading unit for stacking articles on a pallet in a stacked state and a plurality of storage units for placing and supporting the pallet are arranged side by side under a setting allowable condition that is not more than a set upper limit height and not more than a set upper limit weight. A storage shelf; and a transport unit that stores the pallet on which articles are stacked in the stacking unit in the storage unit, and transports the pallet to unload the pallet stored in the storage unit; Control means for controlling the operation of the conveying means,
The transporting means is an article mounting body that can be driven back and forth in a retracted state in which it retracts outward from the storage part and a protruding state in which the storage part protrudes, and can be driven up and down, and the pallet is stored in the storage part. Configured to perform a lowering process stored in the storage unit and a scooping process for removing the pallet stored in the storage unit,
The storage portion is configured to place and support both end portions of the pallet with a pair of left and right support bodies arranged in parallel in a state in which the article placement body in the protruding state is spaced vertically.
When the control means performs the lowering process, the article mounting body protrudes into the protruding state at a reference height for lowering than the pair of left and right supports, and then the pair of left and right supports. The article mounting body is lowered to a lower target height for lowering, and then the operation of the conveying means is controlled and the scooping process is performed in order to retract the article mounting body to the retracted state. Sometimes, the article mounting body is protruded in the protruding state at a scooping reference height corresponding to the lowering target height, and then the scooping target height corresponding to the lowering reference height is An article stacking method in an article storage facility configured to control the operation of the conveying means to raise the article placing body and then to retract the article placing body to the retreated state,
When the article is loaded with the set upper limit weight when the article is loaded with the set upper limit weight as the pallet, the difficult deflection pallet and the article with the set upper limit weight are loaded. And a flexible pallet that exceeds the allowable limit,
In the stacking portion, when stacking articles on the difficult-to-flexible pallet, stacking articles on the setting allowable condition, and when stacking articles on the easily-flexible pallet, the set upper limit height or less and the The items are stacked in a stacked state on the pallet under the setting allowable conditions for the easy-flexible pallet that is lower than the upper-limit weight for the easy-flexible pallet determined to be lower than the set upper limit weight ,
The upper limit weight for the easy deflection pallet is set to a weight such that the amount of downward deflection when the easy deflection pallet loaded with the upper limit weight for the easy deflection pallet is stored in the storage portion is within the allowable limit. Article stacking method in a set article storage facility.

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