JP7563274B2 - Automated Warehouse - Google Patents

Description

This invention relates to an automated warehouse.

For example, an automated warehouse disclosed in Patent Document 1 is known as a conventional technology for an automated warehouse. The automated warehouse disclosed in Patent Document 1 is equipped with a cart lifting and transporting device equipped with lifting guide rails that allow carts to move between the cart travel paths for each stage. When the lifting guide rails are at a predetermined level, a cart travel path is provided that allows carts to move between the lifting guide rails and the cart travel path, and that guides the carts between the loading and unloading work area.

Japanese Patent Application Publication No. 6-156630

However, in the automated warehouse disclosed in Patent Document 1, for example, when storing a load, a cart needs to transport the load and transfer it to the load support section of the shelf, and the next load cannot be stored until the load is stored. Also, when removing a load, the next load cannot be removed until the cart removes the load to be removed. In this way, in the automated warehouse disclosed in Patent Document 1, it is impossible to process the load that exceeds the capacity of the cart and there is a problem that the work efficiency of storing and removing loads is limited by the capacity of the cart.

The present invention was made in consideration of the above problems, and the object of the present invention is to provide an automated warehouse that can transport multiple items while allowing them to be stored and retrieved, thereby improving the work efficiency of storing and retrieving items.

In order to solve the above problems, the present invention provides an automated warehouse comprising a storage shelf having a plurality of cargo storage sections for storing cargo, and a cargo transfer device for transferring cargo into and out of the plurality of cargo storage sections, further comprising a transport device arranged alongside the storage shelf for transporting cargo, the cargo transfer device being arranged above at least one of the storage shelf and the transport device and running along the direction in which cargo is transported by the transport device, and a cargo transfer machine arranged on the travelling body for transferring cargo into and out of the plurality of cargo storage sections by moving back and forth between the transport device and the storage shelf, the storage shelves being arranged alongside each other on both sides of the transport device, and the travelling bodies being arranged above the storage shelves .

In the present invention, the conveying device conveys multiple items to be stored or removed. The traveling body of the item transfer device travels toward the items to be stored that are being conveyed to the conveying device or the items to be removed that are stored on the storage shelf, and the item transfer machine transfers the items to be stored from the item conveying device to the item storage section, or transfers the items to be removed from the item storage section to the conveying device. In other words, it is possible to carry out the entry and exit of items while conveying multiple items to be stored or removed, and it is possible to improve the work efficiency of storing and retrieving items.
In addition, since the running bodies are provided above the storage shelves arranged in parallel on both sides of the conveying device, the load transfer machines are provided above the storage shelves, which significantly improves the efficiency of loading and unloading loads compared to when the running bodies are provided above the conveying device. Also, the load transfer machines can immediately approach the loads stored in the load storage section of the storage shelves. Therefore, loads to be unloaded can be quickly transferred.
Furthermore, in order to solve the above problems, the present invention provides an automated warehouse comprising a storage shelf having a plurality of cargo storage sections for storing cargo, and a cargo transfer device for transferring cargo into and out of the plurality of cargo storage sections, further comprising a transport device arranged juxtaposed to the storage shelf for transporting cargo, the cargo transfer device being arranged above at least one of the storage shelf and the transport device and running along the direction in which cargo is transported by the transport device, and a cargo transfer machine arranged on the travelling body for transferring cargo into and out of the plurality of cargo storage sections by moving back and forth between the transport device and the storage shelf, and the transport device having a plurality of conveyor sections that are independently driven corresponding to the plurality of cargo storage sections.
In the present invention, among the multiple conveyor sections, a specific conveyor section can use the article transfer device to send or retrieve articles from or to the storage shelf, while the conveyor sections other than the specific conveyor section can be used to transport articles for storage or retrieval. In other words, transportation of multiple articles and storage and retrieval of articles from or to the storage shelf can be performed simultaneously.

In addition, in the above-mentioned automated warehouse, the item storage section may be configured to support items and include a conveying device capable of moving the items stored in the item storage section in the extension direction of the item storage section.
In this case, the goods stored in the goods storage section can be moved to the delivery location in advance before they are delivered, so that the efficiency of the delivery and delivery of goods can be further improved.

In the above-mentioned automated warehouse, the traveling body may be configured to be provided above the conveying device.
In this case, since the traveling body is provided above the conveying device, the load transfer machine can immediately approach the load being conveyed by the conveying device, so that the load to be stored can be transferred quickly.

In the above-mentioned automated warehouse, the transport device may be configured to have a plurality of conveyor units that are independently driven corresponding to the plurality of storage units.
In this case, a specific conveyor section among the multiple conveyor sections can use the load transfer device to send or retrieve loads from or to the storage shelf, while the other conveyor sections can be used to transport loads for storage or retrieval. In other words, the transportation of multiple loads and the loading and unloading of loads from or to the storage shelf can be performed simultaneously.

The present invention provides an automated warehouse that can transport multiple items while allowing the items to be stored and retrieved, improving the work efficiency of storing and retrieving items.

1 is a plan view showing an overview of an automated warehouse according to a first embodiment. FIG. 1 is a side view showing an overview of a transport conveyor and a load transfer device in an automated warehouse according to a first embodiment. FIG. 1 is a front view showing an overview of an automated warehouse according to a first embodiment. FIG. (a) is a plan view showing the state in which multiple items are transported on the upstream side while the items are being sent to a storage shelf, (b) is a plan view showing the state in which multiple items are transported on the downstream side while the items are being removed from a storage shelf, and (c) is a plan view showing the state in which multiple items are transported on the upstream and downstream sides while the items are being sent to a storage shelf. FIG. 11 is a plan view showing an overview of an automated warehouse according to a second embodiment. FIG. 13 is a plan view showing an overview of an automated warehouse according to a third embodiment.

First Embodiment
Hereinafter, an automated warehouse according to a first embodiment will be described with reference to the drawings. As shown in Fig. 1, an automated warehouse 10 includes a transfer conveyor 11, an input conveyor 12, an output conveyor 13, a pair of storage shelves 14, a load transfer device 15, and a control device 16.

The transport conveyor 11 corresponds to a transport device for transporting the goods W to be stored or shipped. In this embodiment, the transport conveyor 11 employs a roller conveyor system. Details of the transport conveyor 11 will be described later. As shown in FIG. 1, a storage conveyor 12 is installed at one end of the transport conveyor 11. The storage conveyor 12 sends out the goods W to be stored toward the transport conveyor 11. A shipping conveyor 13 is installed at the other end of the transport conveyor 11. The shipping conveyor 13 transports the goods W to be shipped that have been sent out from the transport conveyor 11. The storage conveyor 12 and the shipping conveyor 13 are roller conveyors, but may be other types of conveyors such as belt conveyors.

As shown in FIG. 1, storage shelves 14 for storing a plurality of loads W are installed on both sides of the conveyor 11. The storage shelves 14 are arranged on both sides of the conveyor 11 and have ten load storage sections 17 for storing the loads W. The load storage sections 17 have a roller conveyor 18 as a conveying device. The roller conveyor 18 has a conveyor frame 19, a plurality of rollers 20 rotatably supported by the conveyor frame 19, and an electric motor (not shown) as a driving source. The load storage sections 17 are arranged along the conveyor 11 at regular intervals. For the sake of convenience, the boundaries of the load storage sections 17 are shown in FIG. 1. The load transfer device 15 is a device that transfers the load W transported by the conveyor 11 to the storage shelves 14 and transfers the load W stored in the storage shelves 14 to the conveyor 11. Details of the load transfer device 15 will be described later. Although the storage shelf 14 has ten storage compartments 17, the number of storage compartments 17 can be any number and is not particularly limited.

The control device 16 is provided near the receiving conveyor 12. The control device 16 controls each part of the automated warehouse 10. Specifically, the control device 16 controls the transport conveyor 11, the receiving conveyor 12, the outgoing conveyor 13, and the load transfer device 15. Although not shown, the control device 16 has a central processing unit (CPU) that executes various programs and a memory unit that stores various programs and data.

Next, the transport conveyor 11 will be described in detail. As shown in FIG. 2, the transport conveyor 11 includes a plurality of conveyor sections 21. The transport conveyor 11 is configured by arranging a plurality of conveyor sections 21 in a straight line. The conveyor section 21 includes a conveyor frame 22, a plurality of rollers 23 rotatably supported by the conveyor frame 22, and an electric motor (not shown) that serves as a drive source. The rollers 23 are arranged in parallel to each other in the conveyor frame 22. A transmission belt (not shown) is hung on each roller 23 in the conveyor section 21, and when a specific roller 23 is rotated by the electric motor, the remaining rollers 23 also rotate. The side of the conveyor section 21 faces the cargo storage section 17 of the storage shelf 14 (see FIG. 1).

The electric motors provided in each conveyor section 21 are controlled by the control device 16. In other words, the control device 16 controls the electric motors of each conveyor section 21. For this reason, in the transport conveyor 11, for example, when some of the adjacent conveyor sections 21 are operated and the remaining conveyor sections 21 are stopped, the load W is transported in some of the transport conveyor 11, and the load W is not transported in other sections than the part transporting the load W. In the transport conveyor 11 of this embodiment, ten conveyor sections 21 are arranged to correspond to the number of load storage sections 17 of the storage shelves 14, but the number of conveyor sections 21 may be more than one and is not particularly limited.

Next, the load transfer device 15 will be described in detail. As shown in FIG. 3, the load transfer device 15 includes a pair of running rails 25, a running body 26, and a load transfer machine 27. The load transfer device 15 also includes a running motor 28 shown in FIG. 2 and a drive motor 29 shown in FIG. 3. As shown in FIG. 2, the pair of running rails 25 extend above the transport conveyor 11 so as to be parallel to the transport direction of the load W. The pair of running rails 25 are disposed in the width direction of the transport conveyor 11 and are parallel to each other. The pair of running rails 25 are supported by a gate-shaped frame (not shown).

The running body 26 has a main body 31, a plurality of rollers 32 that roll on the running rail 25, and a roller support 33 that supports the plurality of rollers 32. The main body 31 is formed of a flat plate-shaped member. A pair of roller support 33 that supports the plurality of rollers 32 is provided on the upper part of the main body 31. The roller support 33 supports the rollers 32 that roll on the upper surface of the running rail 25, the rollers 32 that roll on the lower surface of the running rail 25, and the rollers (not shown) that roll on the side of the running rail 25 so that they can roll. As shown in FIG. 2, the running body 26 runs by being driven by the running motor 28. The running motor 28 is supported by a gate-shaped frame (not shown), and the running motor 28 and the running body 26 are connected by a power transmission member such as a belt, and the rotational force of the running motor 28 is converted into a reciprocating motion of the running body 26. The running motor 28 is controlled by the control device 16.

The load transfer machine 27 is provided on the underside of the main body 31 of the running body 26. The load transfer machine 27 has a slide section 34 that can slide in the width direction of the conveyor 11 relative to the main body 31, and a locking arm 35 provided at both ends of the slide section 34 in the width direction of the conveyor 11. The slide section 34 moves back and forth between the top of one storage shelf 14 and the other storage shelf 14 by driving the drive motor 29. Therefore, the load transfer machine 27 can put in and take out loads W from the pair of storage shelves 14. The drive motor 29 is provided on the upper surface of the main body 31, and the rotational force of the drive motor 29 is converted into a reciprocating movement of the slide section 34 via a power transmission mechanism (not shown). The drive motor 29 is controlled by the control device 16.

The locking arm 35 is rotatably supported at the end of the slide portion 34. The locking arm 35 can be switched between a state in which it extends downward from the slide portion 34 and a state in which it extends horizontally by rotating the locking arm 35 (see FIG. 2). The locking arm 35 is actuated by an actuator (not shown) provided on the slide portion 34. The actuator is controlled by the control device 16.

When a load W on the transport conveyor 11 is to be sent to a storage shelf 14, the locking arm 35 on the side of the storage shelf 14 opposite the destination storage shelf 14 is extended downward, and the locking arm 35 on the destination storage shelf 14 is retracted so as to extend horizontally. When a load W on the storage shelf 14 is to be removed to the transport conveyor 11, with the slide portion 34 moved to the storage shelf 14, the locking arm 35 on the opposite side of the transport conveyor 11 is extended downward, and the locking arm 35 on the transport conveyor 11 is retracted so as to extend horizontally.

Next, the storing and retrieval of goods W by the automated warehouse 10 according to this embodiment will be described. When storing goods W, the transport conveyor 11 transports multiple goods W to be stored based on commands from the control device 16. The multiple goods W transported by the transport conveyor 11 have a designated goods storage section 17 into which they are stored. When the leading goods W among the multiple goods W transported by the transport conveyor 11 reaches a position facing the goods storage section 17 that will be the storage destination of the storage shelf 14, the conveyor section 21 in which the goods W to be stored, including the leading goods W, are located is stopped.

Meanwhile, the running body 26 of the load transfer device 15 moves above the leading load W as soon as it reaches a position facing the load storage section 17 of the storage shelf 14 where the leading load W is to be stored. When the conveyor section 21 containing the loads W to be stored, including the leading load W, is stopped, the slide section 34 of the load transfer machine 27 is slid and the locking arm 35 is pressed against the leading load W, sending the load W from the transport conveyor 11 to the load storage section 17 of the storage shelf 14. The loads W to be stored that remain on the transport conveyor 11 are transported to a position facing the load storage section 17 defined in the storage shelf 14, just like the leading load W, and are sent to the load storage section 17 by the load transfer device 15. Storing operations can be performed until all load storage sections 17 are filled with loads W.

Next, the case of unloading the goods W will be described. When unloading the goods W, the running body 26 of the goods transfer device 15 moves above the conveyor section 21 facing the goods W to be unloaded in order to unload the goods W to be unloaded from the storage shelf 14 based on the command of the control device 16. The slide section 34 of the goods transfer machine 27 is slid from the transport conveyor 11 toward the storage shelf 14, and the locking arm 35 is rotated so that the goods W in the goods storage section 17 can be unloaded. Next, the slide section 34 is moved from the storage shelf 14 toward the transport conveyor 11, and the locking arm 35 is pressed against the goods W in the goods storage section 17 to unload the goods W from the storage shelf 14 to the transport conveyor 11. The goods W unloaded to the transport conveyor 11 are transported toward the unloading conveyor 13 by the operation of the conveyor section 21 that supports the unloaded goods W. Unloading work can be performed until all the goods W in the goods storage section 17 have been unloaded.

In the automated warehouse 10 of this embodiment, when the load transfer machine 27 is sending out or retrieving a load W, the load W can be transported on the conveyor section 21 other than the conveyor section 21 where the load W being sent out or retrieved is located. Therefore, at the same time as the load transfer machine 27 is sending out or retrieving the load W, the conveyor section 21 where the load W is not present may be operated to transport a new load W to be stored that is supplied to the transport conveyor 11, or to retrieve a load W to be retrieved that has already been retrieved on the transport conveyor 11.

Specifically, for example, as shown in FIG. 4(a), when the load transfer machine 27 is sending out loads W from the transport conveyor 11 to the storage shelf 14, the conveyor section 21 upstream of the loads W being sent out on the transport conveyor 11 transports the multiple loads W to be stored. Also, as shown in FIG. 4(b), when the load transfer machine 27 is sending out loads W from the storage shelf 14 to the transport conveyor 11, the conveyor section 21 downstream of the loads W being sent out on the transport conveyor 11 transports the multiple loads W to be shipped out. Furthermore, as shown in FIG. 4(c), when the load transfer machine 27 is sending out loads W from the transport conveyor 11 to the storage shelf 14, the conveyor section 21 upstream of the loads W being sent out on the transport conveyor 11 transports the multiple loads W to be stored. At the same time, the conveyor section 21 downstream of the loads W being sent out on the transport conveyor 11 transports the multiple loads W to be shipped out.

The automated warehouse 10 according to this embodiment has the following advantages.
(1) The transport conveyor 11 transports multiple items W to be stored or removed from the warehouse. The running body 26 of the item transfer device 15 travels toward the items W to be stored that are being transported by the transport conveyor 11, or toward the items W to be removed that are stored on the storage shelf 14. The item transfer machine 27 transfers the items W to be stored from the transport conveyor 11 to the item storage section 17, or transfers the items W to be removed from the item storage section 17 to the transport conveyor 11. In other words, it is possible to take in and out the items W while transporting multiple items W to be stored or removed from the warehouse, and the work efficiency of storing and removing the items W can be improved.

(2) The cargo storage section 17 has a roller conveyor 18 that supports the cargo W and can move the cargo W stored in the cargo storage section 17 in the extension direction of the cargo storage section 17. Therefore, the cargo W stored in the cargo storage section 17 can be moved to the delivery location in advance before it is removed from the warehouse, further improving the work efficiency of storing and retrieving the cargo W. For example, the cargo W stored in the cargo storage section 17 is moved to another cargo storage section 17 that has been determined in advance as the delivery location on the storage shelf 14 before it is removed from the warehouse, and the moved cargo W is then retrieved.

(3) The running body 26 is provided above the transport conveyor 11. This allows the load transfer machine 27 to immediately approach the load W being transported by the transport conveyor 11. This allows the load W to be stored to be transferred quickly.

(4) The transport conveyor 11 has multiple conveyor sections 21 that are driven independently in correspondence with the multiple cargo storage sections 17. Therefore, among the multiple conveyor sections 21, a specific conveyor section 21 can be used to send or remove cargo W from or to the storage shelf 14 using the cargo transfer device 15, while the other conveyor sections 21 can be used to transport cargo W for storage or retrieval. In other words, the transportation of multiple cargo W and the loading and unloading of cargo W from or to the storage shelf 14 can be performed simultaneously.

(5) The transport conveyor 11 transports the goods W to be stored and removed, and the goods transfer device 15 transports the goods W between the transport conveyor 11 and the storage shelf 14. Therefore, the transport of the goods W is less likely to restrict the loading and unloading of the goods W, and the loading and unloading of the goods W is less likely to restrict the transport of the goods W. As a result, the transport of the goods W and the loading and unloading of the goods W can be speeded up.

Second Embodiment
Next, an automated warehouse according to a second embodiment will be described. This embodiment differs from the first embodiment in that the traveling body of the load-transfer device is provided above the storage shelves. In this embodiment, the same configuration as in the first embodiment will be referred to and the same reference numerals will be used.

In the automated warehouse 40 shown in FIG. 5, the load transfer device 41 includes a pair of running rails 25 arranged above the storage shelves 14, a running body 26 that runs on the pair of running rails 25 in the transport direction of the load W, and a load transfer machine 42 provided on each running body 26. The running body 26 runs back and forth on the running rails 25 by a running motor 28 (not shown). The load transfer machine 42 located above one storage shelf 14 moves back and forth between the one storage shelf 14 and the transport conveyor 11 to take in and out the load W from the load storage section 17 of the one storage shelf 14. The load transfer machine 42 located above the other storage shelf 14 moves back and forth between the other storage shelf 14 and the transport conveyor 11 to take in and out the load W from the load storage section 17 of the other storage shelf 14. The pair of load transfer machines 42 take in and out the load W at positions that do not interfere with each other.

Each load transfer machine 42 is equipped with a slide section 34 and a locking arm 35, not shown. The slide section 34 moves back and forth due to a drive motor 29 provided on the running body 26. When the load transfer machine 42 sends out a load W from the transport conveyor 11 to the storage shelf 14, the slide section 34 is moved above the transport conveyor 11, and the locking arm 35 sends the load W from the transport conveyor 11 to the storage shelf 14. When the load transfer machine 42 removes the load W from the storage shelf 14 to the transport conveyor 11, the slide section 34 is positioned above the load W, and the locking arm 35 removes the load W from the storage shelf 14 to the transport conveyor 11.

This embodiment has the same effects as the effects (1), (2), and (4) of the first embodiment. In addition, in the automated warehouse 40, the running bodies 26 equipped with the load transfer machine 42 move back and forth above a pair of storage shelves 14. Therefore, two loads W can be simultaneously loaded and unloaded, and compared to the first embodiment in which the running bodies 26 are provided above the transport conveyor 11, the loading and unloading of loads W by the load transfer device 15 can be doubled, and the work efficiency of loading and unloading loads W is greatly improved. In addition, since the load transfer machines 42 are disposed above the storage shelves 14, the load transfer machines 42 can immediately approach the loads W stored in the load storage sections 17 of the storage shelves 14.

Third Embodiment
Next, an automated warehouse according to a third embodiment will be described. This embodiment differs from the first and second embodiments in that the running body of the load transfer device is provided above the transport conveyor and above the storage shelf. In this embodiment, the same configuration as in the first and second embodiments will be described with reference to the first embodiment, and common reference numerals will be used.

In the automated warehouse 50 shown in FIG. 6, the load transfer device 51 includes a pair of running rails 25 arranged above the transport conveyor 11 and the pair of storage shelves 14, and a running body 26 that runs on the pair of running rails 25 in the transport direction of the load W. The load transfer device 51 further includes a load transfer machine 27 and a pair of load transfer machines 42. The running body 26 runs back and forth on the running rails 25 by a travel motor 28 (not shown). The load transfer machine 27 moves back and forth between above one storage shelf 14 and above the other storage shelf 14, so that the load W can be put in and taken out of the pair of storage shelves 14. One load transfer machine 42 moves back and forth between one storage shelf 14 and the transport conveyor 11, and the other load transfer machine 42 moves back and forth between one storage shelf 14 and the transport conveyor 11. The load transfer machine 27 and the pair of load transfer machines 42 load and unload loads W in positions that do not interfere with each other.

This embodiment provides the same effects as the first embodiment. In addition, in the automated warehouse 50, a running body 26 equipped with a load transfer machine 42 moves back and forth above the transport conveyor 11 and the pair of storage shelves 14. Therefore, three loads W can be simultaneously loaded and unloaded, and compared to the first and second embodiments, the number of loads W loaded and unloaded by the load transfer device 51 can be increased, and the work efficiency of loading and unloading the loads W is greatly improved.

The present invention is not limited to the above embodiment, and various modifications are possible within the scope of the invention. For example, the following modifications may be made:

In the above embodiment, the storage shelves are provided on both sides of the transport device, but the present invention is not limited to this. A storage shelf may be provided on one side of the transport device.
In the above embodiment, the transport device is a roller conveyor, but the present invention is not limited to this. The transport device may be a conveyor other than a roller conveyor, and may be, for example, a transport device having a plurality of conveyor portions formed by belt conveyors.
In the above embodiment, the storage unit supports the load and includes a conveying device that can move the load stored in the load storage unit in the extension direction of the load storage unit, but this is not limited to this. The load storage unit may be configured in a manner other than the conveying device as long as it is capable of supporting the load, and may be, for example, a shelf board having a relatively simple shape that simply supports the load.
In the above embodiment, a travel motor for moving the traveling body and a drive motor for reciprocating the sliding part are provided, but this is not limited to this. A common motor may be used to drive the traveling body and the sliding part.
In the above embodiment, the loader is configured to push the load into and out of the storage shelf using the locking arm of the loader, but this is not limited to the above. The loader may be provided with a means for loading and unloading the load, such as a suspending means for suspending the load.

10, 40, 50 Automated warehouse 11 Transport conveyor 12 Incoming conveyor 13 Outgoing conveyor 14 Storage shelf 15, 41, 51 Load transfer device 16 Control device 17 Load storage section 18 Roller conveyor (transport device)
21 conveyor section 26 running body 27, 42 load transfer machine 34 slide section 35 locking arm W load

Claims (5)

A storage shelf having a plurality of storage compartments for storing items;
In the automated warehouse,
A transport device is provided next to the storage shelf and transports items,
The load transfer device is
a traveling body provided above at least one of the storage shelf and the conveying device and adapted to travel along a direction in which the conveying device conveys articles;
A load transfer machine is provided on the traveling body and moves back and forth between the conveying device and the storage shelf to load and unload loads into and from the multiple load storage sections ,
The storage shelves are provided on both sides of the transport device,
An automated warehouse characterized in that the traveling bodies are each arranged above the storage shelves . A storage shelf having a plurality of storage compartments for storing items;
In the automated warehouse,
A transport device is provided next to the storage shelf and transports items,
The load transfer device is
a traveling body provided above at least one of the storage shelf and the conveying device and adapted to travel along a direction in which the conveying device conveys articles;
A load transfer machine is provided on the traveling body and moves back and forth between the conveying device and the storage shelf to load and unload loads into and from the multiple load storage sections,
The automated warehouse is characterized in that the conveying device has a plurality of conveyor sections that are independently driven corresponding to the plurality of cargo storage sections . 3. The automated warehouse according to claim 1 or 2, characterized in that the cargo storage section has a conveying device that supports cargo and is capable of moving the cargo stored in the cargo storage section in the extension direction of the cargo storage section . The automated warehouse according to any one of claims 1 to 3, characterized in that the traveling body is provided above the conveying device . 2. The automated warehouse according to claim 1 , wherein the transport device has a plurality of conveyor units that are independently driven in correspondence with the plurality of storage units.

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