Food storage systems and food storage methods

Abstract

To provide a food storage system and food storage method that can improve work efficiency and reduce labor costs. [Solution] A food storage system according to one aspect of the present invention includes: a loading area on which food can be loaded onto a loading section; a first transport section on which the loading section is transported; a storage unit having a storage unit transport section connected to the downstream side of the first transport section in the transport direction of the loading section; a second transport section connected to the downstream side of the storage unit transport section in the transport direction, on which the loading section removed from the storage unit is transported; a removal area provided at the downstream end of the second transport section in the transport direction, from which food can be removed from the loading section; and a third transport section connecting the removal area and the loading area, and returning the loading section that has passed through the removal area back to the loading area.

Description

Technical Field

[0001] The present invention relates to a food storage system and a food storage method.

Background Art

[0002] In a system for refrigerating or freezing goods, a configuration in which a forklift is used to carry goods in and out of a refrigerated warehouse is known (see, for example, Patent Document 1 below).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the prior art, there is still room for improvement in terms of improving workability and labor saving.

[0005] The present invention provides a food storage system and a food storage method capable of improving workability and saving labor.

Means for Solving the Problems

[0006] In order to solve the above problems, the present invention adopts the following aspects. A food storage system according to one aspect of the present invention includes: a loading area on which food can be loaded onto a loading section; a first transport section on which the loading section is transported; a storage cabinet transport section of the first transport section that is connected to the downstream side in the transport direction of the loading section, and which can store the loading section that has been transported onto the storage cabinet transport section at a predetermined temperature with food loaded on it; a second transport section of the storage cabinet transport section that is connected to the downstream side in the transport direction of the storage section, and on which the loading section that has been removed from the storage cabinet is transported; an extraction area provided at the downstream end of the second transport section in the transport direction, from which food can be extracted from the loading section; and a third transport section that connects the extraction area and the loading area, and returns the loading section that has passed through the extraction area back to the loading area.

[0007] According to this embodiment, the loading unit containing the food is stored in a storage area and then transported to a retrieval area. After the food is removed from the loading unit transported to the retrieval area, it is transported back to the loading area by a third transport unit. In this way, transport, storage, and retrieval can be performed on a single line, which improves work efficiency and reduces manpower compared to conventional methods where transport is performed manually. Furthermore, by reducing manpower in the food storage system, it becomes possible to allocate manpower to other processes, thus leveling the workload. Furthermore, in this embodiment, the food contained in the loading section is stored in a storage unit maintained at a predetermined temperature, allowing the food to be transported to the retrieval area at the appropriate time. This enables the food to be supplied at the appropriate time.

[0008] In the food storage system according to the above embodiment, it is preferable that the storage unit includes an entrance door that opens and closes an entrance opening for transporting the mounted unit from the first transport unit into the storage unit, and an exit door that is provided separately from the entrance opening and opens and closes an exit opening for transporting the mounted unit from the storage unit to the second transport unit. According to this embodiment, for example, compared to a case where the entrance and exit of a storage facility are provided as a common entrance and exit, the number of times the same door is opened and closed can be reduced. This makes it easier to maintain a predetermined temperature inside the storage facility.

[0009] In the food storage system according to the above embodiment, it is preferable to have a fourth transport unit that connects the first transport unit and the second transport unit while bypassing the storage unit, and on which the mounted unit is transported. According to this embodiment, unused loading units can be stored in the fourth transport unit. Therefore, the process of loading food transported from the food processing area onto the loading units and the process of shipping food stored in the storage unit can be performed independently at appropriate timings. This allows for efficient system operation. Furthermore, loading units with food loaded can be preferentially stored in the storage unit. In addition, for example, during defrosting, loading units without food loaded can be stored in the fourth transport unit, thereby emptying the storage unit. As a result, running costs can be reduced by making effective use of the storage unit, and initial costs can be reduced by making the storage unit smaller.

[0010] In the food storage system according to the above embodiment, it is preferable to have a fifth transport unit that bypasses the loading area and connects the third transport unit and the fourth transport unit. According to this embodiment, the loading unit can be circulated, stored, or kept on standby regardless of whether or not food is loaded. For example, when it is desired to circulate or keep the loading unit on standby without loading food, the loading unit can be transported from the third transport unit to the fifth transport unit without passing through the loading area. This makes it possible to transport unused loading units to the fourth transport unit without hindering the food loading work in the loading area. As a result, work efficiency can be improved.

[0011] In the food storage system according to the above embodiment, it is preferable that the system includes a first stacking device provided in the first transport section for stacking the loading sections vertically, and a disassembly device provided in the second transport section for separating the loading sections into individual layers. According to this embodiment, food can be stored in a storage facility with the loading units stacked in multiple layers. This allows for three-dimensional storage of food, reducing the required floor space and facilitating increased production. Furthermore, compared to, for example, manual stacking and unstacking, it is possible to improve the working environment by eliminating heavy labor and reducing the risk of injuries associated with such labor.

[0012] In the food storage system according to the above embodiment, it is preferable that the system includes a second stacking device provided in the fifth transport section for stacking the loading sections vertically, and a disassembly device provided in the second transport section for separating the loading sections into individual layers. According to this embodiment, a large number of loading units can be transported without passing through the loading area, regardless of whether or not they contain food. In this case, for example, unused loading units can be stored vertically in the fourth transport unit, making it easier to prioritize the storage of loading units containing food within the storage facility. Therefore, it is easier to increase production while keeping the floor space of the storage facility down. In addition, compared to, for example, manual stacking and unstacking work, it is possible to improve the working environment by eliminating heavy labor and reducing the risk of injuries associated with heavy labor.

[0013] In the food storage system according to the above embodiment, it is preferable that the third transport unit is provided with a cleaning unit for cleaning the mounting unit. According to this embodiment, by cleaning the loading section after it has passed through the retrieval area, the loading section can be returned to the first transport section in a clean state. This makes maintenance of the storage facility easier.

[0014] In the food storage system according to the above embodiment, it is preferable that the storage transport unit comprises a plurality of storage transport paths, each having an upstream end branching off from the first transport unit and a downstream end joining the second transport unit, and that the storage unit comprises a plurality of storage units, each having one of the plurality of storage transport paths and capable of independently adjusting the temperature of each other. According to this embodiment, a large number of food items can be stored by providing multiple storage compartments. Furthermore, since the temperature inside each storage compartment can be adjusted independently, food management becomes easier compared to storing food in a single compartment.

[0015] In the food storage system according to the above embodiment, each of the plurality of storage sections is equipped with a heat exchanger having a defrosting function, and it is preferable that when defrosting occurs in any of the plurality of storage sections, the equipped section housed in any of the plurality of storage sections is transported to the remaining storage section. According to this embodiment, when defrosting any of the storage compartments, the mounting components installed in one of the storage compartments are transported to the remaining storage compartments, thereby enabling defrosting of any of the storage compartments without affecting the food. This allows for efficient system operation and improved maintainability.

[0016] A food storage method according to one aspect of the present invention uses a food storage system according to the above aspect. According to this embodiment, by using the food storage system described above, it is possible to improve work efficiency and reduce manpower when storing food. [Effects of the Invention]

[0017] According to each of the above embodiments, it is possible to improve work efficiency and reduce manpower. [Brief explanation of the drawing]

[0018] [Figure 1] This is a schematic diagram (plan view) of a food storage system. [Figure 2]It is a perspective view of the container. [Figure 3] It is a plan view corresponding to FIG. 1 showing the state at the start of production. [Figure 4] It is a plan view corresponding to FIG. 1 showing the state at the time of warehousing. [Figure 5] It is a plan view corresponding to FIG. 1 showing the state at the time of warehousing and shipping. [Figure 6] It is a plan view corresponding to FIG. 1 showing the state at the time of shipping. [Figure 7] It is a plan view corresponding to FIG. 1 showing the state during defrosting.

Mode for Carrying Out the Invention

[0019] Next, embodiments of the present invention will be described based on the drawings. In the embodiments and modifications described below, corresponding configurations may be denoted by the same reference numerals and the description thereof may be omitted. In the following description, expressions indicating relative or absolute arrangements such as "parallel", "orthogonal", "center", "coaxial", etc. not only strictly represent such arrangements, but also represent a state in which they are relatively displaced with a tolerance or an angle and distance that can obtain the same function. Further, in the present embodiment, "opposite" includes not only the case where the orthogonal directions (normal directions) of two surfaces coincide with each other, but also the case where the orthogonal directions intersect each other.

[0020] FIG. 1 is a schematic configuration diagram (plan view) of the food storage system 1. The food storage system 1 shown in Figure 1 is a system that automatically transports food F (see Figure 2) and stores food F at a predetermined temperature. The food storage system 1 is installed in a food storage area 2 located between the food processing area and the shipping area within the factory. In this embodiment, food F (see Figure 2) is meat such as chicken. Food F is transported to the food storage area 2 (food storage system 1) after undergoing predetermined processing in the food processing area. In this embodiment, "predetermined processing" includes processing steps for the food itself and packaging steps such as wrapping the processed food in bags or pouches. In other words, in the food processing area, the food is processed to a state where it can be shipped. Hereinafter, packaged food F will simply be referred to as food F. However, packaging is not a mandatory component for food F stored in the food storage system 1.

[0021] <Container 3> Figure 2 is a perspective view of container 3. As shown in Figure 2, food is transported and stored in the food storage system 1 while contained in a container (loading section) 3. The container 3 is, for example, a mesh-type transport box. Food F is stored in the container 3 in multiple rows and multiple layers (for example, 2 rows and 4 layers). In the following description, the container 3 containing food F is sometimes referred to as the actual container 3A (see Figure 4), and the container 3 without food is sometimes referred to as the empty container 3B (see Figure 4). The number of food items F loaded into the container 3 can be changed as appropriate.

[0022] [Food Storage System 1] As shown in Figure 1, the food storage system 1 comprises an upstream line 10, a storage unit 11, a buffer line 12, a downstream line 13, a circulation line 14, and a bypass line 15. In Figure 1, the vertical direction is defined as the up and down direction, and the two directions perpendicular to the up and down direction are defined as the X and Y directions. Furthermore, in the following description, the transport direction of the container 3 will be described as the transport direction of the food storage system 1.

[0023] <Upstream Line 10> The upstream line 10 is a line located upstream of the storage unit 11 in the transport direction. The upstream line 10 includes a loading area 21, an upstream transport section 22, and a first-stage stacking device 23. The loading area 21 is the area where food F processed in the food processing area is stored in container 3. The loading area 21 is equipped with a supply conveyor 24 that transports food F from the food processing area, and a work station 25 that stores the food F transported by the supply conveyor 24 into empty container 3B. In the loading area 21, for example, an operator sequentially stores the food F transported from the food processing area into container 3 at the work station 25.

[0024] The upstream transport unit 22 transports the containers 3 within the upstream line 10. The upstream transport unit 22 also transfers the containers 3 between the upstream line 10 and the storage facility 11, between the upstream line 10 and the buffer line 12, and between the upstream line 10 and the circulation line 14. The upstream transport unit 22 includes a first stacking supply conveyor 31, a first stacking discharge conveyor 32, a first upstream transfer conveyor 33, a second upstream transfer conveyor 34, a buffer upstream branching conveyor 35, a first upstream branching conveyor 36, and a second upstream branching conveyor 37.

[0025] Each conveyor in this embodiment is, for example, a roller type, and transports the container 3 downstream by a driving force from a drive source (not shown), such as a motor. In this embodiment, one row of containers 3 can be transported by one row of conveyors. The conveyors 31 to 37 may also be belt type, suspension type, etc. Furthermore, multiple rows of containers 3 may be transported by one row of conveyors.

[0026] The first-stage supply conveyor 31 connects the loading area 21 (work station 25) and the first-stage stacking device 23. The first-stage supply conveyor 31 extends from the loading area 21 (work station 25) to the +Y side. The first-stage supply conveyor 31 transports containers 3 from the loading area 21 to the first-stage stacking device 23. The first stacking discharge conveyor 32 connects the first stacking device 23 and the first upstream transfer conveyor 33. The first stacking discharge conveyor 32 extends from the first stacking device 23 toward the +Y side. On the first stacking discharge conveyor 32, the containers 3 discharged from the first stacking device 23 are transported toward the first upstream transfer conveyor 33. In this embodiment, "connection" means a state in which the containers 3 can be transported between the two components, and is not necessarily limited to the case where the two components are mechanically connected.

[0027] The first upstream transfer conveyor 33 extends from the +Y side end (downstream side end) of the first stacking discharge conveyor 32 toward the -X side. On the first upstream transfer conveyor 33, containers 3 that have passed through the first stacking device 23, or containers 3 that have passed through the bypass line 15, are transported toward the -X side. The second upstream conveyor 34 extends from the -X side end (downstream side end) of the first upstream conveyor 33 toward the -Y side. On the second upstream conveyor 34, containers 3 are transported toward the -Y side.

[0028] The buffer upstream branch conveyor 35 connects the upstream line 10 and the buffer line 12. The buffer upstream branch conveyor 35 extends from the +Y side end (upstream side end) of the second upstream transfer conveyor 34 toward the -X side. In this embodiment, the buffer upstream branch conveyor 35 is provided in multiple rows (for example, 3 rows) in the Y direction. The first upstream branching conveyor 36 connects the upstream line 10 and the storage facility 11 (the first storage unit 40, described later). The first upstream branching conveyor 36 extends from the center of the second upstream transfer conveyor 34 in the Y direction (downstream of the branching point of the buffer branching conveyor 35) toward the -X direction. In this embodiment, the first upstream branching conveyor 36 is provided in multiple rows (for example, 3 rows) in the Y direction. The second upstream branching conveyor 37 connects the upstream line 10 and the storage facility 11 (the second storage unit 41, which will be described later). The second upstream branching conveyor 37 extends from the -Y side end of the second upstream transfer conveyor 34 (downstream of the branching point of the first upstream branching conveyor 36) toward the -X side. In this embodiment, the second upstream branching conveyor 37 is provided in multiple rows (for example, 3 rows) in the Y direction.

[0029] The first stacking device 23 stacks the containers 3 transported from the first stacking supply conveyor 31 vertically and discharges the stacked containers 3 to the first stacking discharge conveyor 32. The first stacking device 23 stacks multiple containers 3 such that containers 3 already brought into the first stacking device 23 are positioned above, and containers 3 to be brought into the first stacking device 23 next are positioned below.

[0030] <Storage 11> The storage unit 11 stores the food F contained in the container 3 in a frozen state at a predetermined temperature. The storage unit 11 is equipped with a first storage unit 40 and a second storage unit 41. The first storage unit 40 is a so-called one-way freezer, in which containers 3 can pass in one direction from the +X side to the -X side. The first storage unit 40 comprises a first storage section 43, a first refrigeration device (not shown), and a first internal transport path 44.

[0031] The first storage unit 43 includes a refrigerated warehouse 45, an entrance door 46, and an exit door 47. The refrigerated warehouse 45 forms the storage space for the container 3. The refrigerated warehouse 45 comprises a housing 48, an upstream shielding section 49, and a downstream shielding section 50. The housing 48 is formed in a rectangular parallelepiped shape with the X direction as its longitudinal direction in a plan view. An inlet opening 48a is formed in the side wall on the +X side of the housing 48, which connects the inside and outside of the refrigerated warehouse 45. An outlet opening 48b is formed in the side wall on the -X side of the housing 48, which connects the inside and outside of the refrigerated warehouse 45. The container 3 is brought into the refrigerated warehouse 45 through the inlet opening 48a and is brought out from the refrigerated warehouse 45 through the outlet opening 48b.

[0032] The upstream shielding section 49 divides the housing 48 into a front chamber 55 and a main chamber 56. In this embodiment, the upstream shielding section 49 protrudes inward in the Y direction from the side walls on both sides in the Y direction of the housing 48. The gaps between each upstream shielding section 49 constitute an upstream communication opening 48c that constantly connects the front chamber 55 and the main chamber 56. That is, the opening area of ​​the upstream communication opening 48c (cross-sectional area perpendicular to the transport direction (X direction)) is smaller than the cross-sectional area perpendicular to the X direction of the front chamber 55 and the main chamber 56, respectively (cross-sectional area perpendicular to the transport direction).

[0033] The downstream shielding section 50 divides the housing 48 into a main chamber 56 and a rear chamber 57. In this embodiment, the downstream shielding section 50 protrudes inward in the Y direction from the side walls on both sides in the Y direction of the housing 48. The gaps between each downstream shielding section 50 constitute a downstream communication opening 48d that constantly connects the main chamber 56 and the rear chamber 57. That is, the opening area of ​​the downstream communication opening 48d (cross-sectional area perpendicular to the transport direction (X direction)) is smaller than the cross-sectional area perpendicular to the X direction of the main chamber 56 and the rear chamber 57 (cross-sectional area perpendicular to the transport direction). Note that each shielding section 49, 50 only needs to be able to obstruct at least a portion of the airflow between the front chamber 55 and the main chamber 56, and between the rear chamber 57 and the main chamber 56. In this case, the shielding parts 49 and 50 in this embodiment may be configured to shield at least a portion of the space between the front chamber 55 and the main chamber 56, and between the rear chamber 57 and the main chamber 56, and may be configured by doors or the like that open and close the corresponding communication openings 48c and 48d.

[0034] The loading door 46 opens and closes the loading opening 48a. The loading door 47 opens and closes the loading opening 48b. Each door 46, 47 can be, for example, a double door that can slide in the Y direction.

[0035] The first refrigeration unit cools the inside of the refrigerated warehouse 45. The first refrigeration unit cools the inside of the refrigerated warehouse 45 by exchanging heat between the air inside the refrigerated warehouse 45 and an evaporator (heat exchanger) installed inside the refrigerated warehouse 45. When food F is stored in at least a portion of the refrigerated warehouse 45 (storage state), the internal temperature of the refrigerated warehouse 45 is maintained at, for example, about -35°C. On the other hand, when no food F is stored in the refrigerated warehouse 45 at all (non-storage state), the internal temperature of the refrigerated warehouse 45 may be increased compared to the storage state, or the fan frequency may be lowered.

[0036] The first internal transport path 44 transports containers 3 within the refrigerated warehouse 45. The first internal transport path 44 is arranged in multiple rows in the Y direction, corresponding to the first upstream branch conveyor 36. The first internal transport path 44 includes a front chamber conveyor 60, a main chamber conveyor 61, and a rear chamber conveyor 62. The front chamber conveyor 60 is located inside the front chamber 55. The front chamber conveyor 60 transfers containers 3 between itself and the first upstream branch conveyor 36 through the loading opening 48a. Multiple rows of front chamber conveyors 60 are provided in the Y direction. Each front chamber conveyor 60 faces the corresponding first upstream branch conveyor 36 in the X direction through the loading opening 48a.

[0037] The main chamber conveyor 61 is located inside the main chamber 56. The main chamber conveyor 61 transfers containers 3 between itself and the front chamber conveyor 60 through the upstream communication port 48c. The main chamber conveyor 61 is arranged in multiple rows in the Y direction. Each main chamber conveyor 61 faces its corresponding front chamber conveyor 60 in the X direction through the upstream communication port 48c. The rear chamber conveyor 62 is located inside the rear chamber 57. The rear chamber conveyor 62 transfers containers 3 between it and the main chamber conveyor 61 through a downstream communication port 48d. Multiple rows of rear chamber conveyors 62 are provided in the Y direction. Each rear chamber conveyor 62 faces the corresponding main chamber conveyor 61 in the X direction through the downstream communication port 48d. Each conveyor 60-62 may operate synchronously with each other or independently. The refrigerated warehouse 45 may also consist only of the main chamber 56.

[0038] The second storage unit 41 comprises a second storage section 63, a second refrigeration device (not shown), and a second internal transport path 64. The second storage unit 41 has the same configuration as the first storage unit 40. Therefore, the components of the second storage unit 41 that correspond to the first storage unit 40 are denoted by the same reference numerals as the first storage unit 40 and their description is omitted. The first internal transport path 44 and the second internal transport path 64 constitute the storage transport section of the present invention.

[0039] <Buffer line 12> The buffer line 12 stores containers 3 outside the storage area 11 at room temperature in the factory (food storage area 2). The buffer line 12 bypasses the storage area 11 and connects the upstream line 10 and the downstream line 13. The buffer line 12 is installed on the +Y side of the first storage unit 40, alongside each storage unit 40, 41. The buffer line 12 is equipped with multiple rows of buffer conveyors 67. Each buffer conveyor 67 extends in the X direction while being aligned in the Y direction. Each buffer conveyor 67 is individually connected to the corresponding buffer upstream branch conveyor 35 at its +X side end.

[0040] In this embodiment, the amount of containers 3 that can be stored in the buffer line 12 is greater than the amount of containers 3 that can be stored in each individual storage unit 40, 41 (internal transport path 44, 64), but less than the total amount of containers 3 that can be stored in all storage units 40, 41 combined. The amount of containers that can be stored is the amount of containers 3 that can be loaded in the buffer line 12 and each storage unit 40, 41. That is, the amount of containers that can be stored is calculated by the product of the length of the conveyor in the transport direction and the number of containers 3 stacked in the vertical direction. In this embodiment, the amount of containers that can be stored is set by making the length of the buffer conveyor 67 longer than the length of the internal transport path 44 for each storage unit 40, 41. However, the amount of containers 3 that can be stored in the buffer line 12 and the amount of containers 3 that can be stored in each individual storage unit 40, 41 can be set as appropriate.

[0041] <Downstream Line 13> The downstream line 13 is a line located downstream of the storage unit 11. The downstream line 13 includes a downstream conveying section 70, a step-breaking device 71, and an retrieval area 72. The downstream transport section 70 transports the containers 3 within the downstream line 13. The downstream transport section 70 also transfers the containers 3 between the downstream line 13 and the storage facility 11, between the downstream line 13 and the circulation line 14, and between the downstream line 13 and the buffer line 12. The downstream transport section 70 includes a first downstream merging conveyor 75, a second downstream merging conveyor 76, a buffer downstream merging conveyor 77, a first downstream transfer conveyor 78, a second downstream transfer conveyor 79, a disassembled supply conveyor 80, and a disassembled discharge conveyor 81.

[0042] The first downstream merging conveyor 75 connects the downstream line 13 and the first storage unit 40. The first downstream merging conveyor 75 transfers containers 3 to the rear chamber conveyor 62 through the discharge opening 48b of the first storage unit 40. Multiple rows of the first downstream merging conveyor 75 are provided in the Y direction. Each first downstream merging conveyor 75 faces the corresponding rear chamber conveyor 62 in the X direction through the discharge opening 48b of the first storage unit 40. The second downstream merging conveyor 76 connects the downstream line 13 and the second storage unit 41. The second downstream merging conveyor 76 transfers containers 3 to the rear chamber conveyor 62 through the discharge opening 48b of the second storage unit 41. Multiple rows of the second downstream merging conveyor 76 are provided in the Y direction. Each second downstream merging conveyor 76 faces the corresponding rear chamber conveyor 62 in the X direction through the discharge opening 48b of the second storage unit 41.

[0043] The buffer downstream merging conveyor 77 connects the downstream line 13 and the buffer line 12. The buffer downstream merging conveyor 77 is provided in multiple rows (e.g., 3 rows) in the Y direction on the +Y side relative to the first downstream transfer conveyor 78. Each buffer downstream merging conveyor 77 extends parallel to each other in the X direction. Each buffer downstream merging conveyor 77 is individually connected to the -X side end (downstream end) of the corresponding buffer conveyor 67.

[0044] The first downstream transfer conveyor 78 merges the branch conveyors 75-77. The first downstream transfer conveyor 78 is located on the -X side relative to the branch conveyors 75-77 and extends in the Y direction. At its center in the Y direction, the first downstream transfer conveyor 78 is connected to the -X side end (downstream end) of each first downstream merging conveyor 75. At its -Y side end, the first downstream transfer conveyor 78 is connected to the -X side end (downstream end) of each second downstream merging conveyor 76. At its +Y side end, the first downstream transfer conveyor 78 is connected to the -X side end (downstream end) of each buffer downstream merging conveyor 77. The second downstream conveyor 79 is connected to the +Y side end (downstream end) of the first downstream conveyor 78. The second downstream conveyor 79 extends in the X direction.

[0045] The disassembly supply conveyor 80 connects the second downstream transfer conveyor 79 and the disassembly device 71. The disassembly supply conveyor 80 extends from the second downstream transfer conveyor 79 towards the -Y side. The disassembly and discharge conveyor 81 connects the disassembly device 71 and the removal area 72. The disassembly and discharge conveyor 81 extends from the disassembly device 71 toward the -Y side.

[0046] Multiple stacks of containers 3, arranged vertically, are supplied to the stacking dismantling device 71 via the stacking dismantling supply conveyor 80. The stacking dismantling device 71 sequentially removes the bottom container 3 from the multiple stacks of containers 3 and discharges them one by one to the stacking dismantling discharge conveyor 81.

[0047] In the unpacking area 72, containers 3 that have passed through the unpacking device 71 are transported one by one by the unpacking discharge conveyor 81. The unpacking area 72 is equipped with a boxing robot 83 and a box transport conveyor 84.

[0048] The box-packing robot 83 sequentially places the food products F contained in the container 3 into boxes (for example, cardboard boxes) supplied from a box-making machine (not shown). In this embodiment, the box-packing robot 83 places the food products F contained in the container 3 into the boxes in multiple rows and multiple layers.

[0049] The box conveyor 84 transports the boxed food F toward a storage facility (freezer) not shown. The boxes are then transported to the storage facility after passing through inspection equipment such as metal detectors, X-ray detectors, and weight detectors, as well as a sealing machine that seals the boxes.

[0050] <Circulation Line 14> The circulation line 14 is a line that returns the containers 3 that have passed through the pick-up area 72 (packing robot 83) back to the upstream line 10. The circulation line 14 includes a circulation transport section 90, a first reversing device 91, a washing section 92, a second reversing device 93, and a sorting station 94.

[0051] The circulating conveying section 90 includes a first circulating conveyor 96, a second circulating conveyor 97, a third circulating conveyor 98, a fourth circulating conveyor 99, and a fifth circulating conveyor 100. The first circulating conveyor 96 connects the boxing robot 83 and the first reversing device 91. The first circulating conveyor 96 extends from the boxing robot 83 toward the -Y side. The second circulation conveyor 97 connects the first reversing device 91 and the washing unit 92. The second circulation conveyor 97 extends in the X direction on the -Y side relative to the second storage unit 41. The third circulating conveyor 98 connects the washing section 92 and the second reversing device 93. The third circulating conveyor 98 extends from the second circulating conveyor 97 towards the +X side. The fourth circulating conveyor 99 connects the washing section 92 and the sorting station 94. The fourth circulating conveyor 99 extends in the Y direction between the second upstream transfer conveyor 34 and the loading area 21. The fifth circulating conveyor 100 connects the distribution station 94 and the loading area 21 (work station 25). The fifth circulating conveyor 100 branches off from the downstream end of the fourth circulating conveyor 99 (upstream of the second stacking device 111) and extends to the +X side.

[0052] The first inversion device 91 is a device that inverts the container 3 between the first circulation conveyor 96 and the second circulation conveyor 97. Specifically, when the container 3 received from the first circulation conveyor 96 is an empty container 3B, the first inversion device 91 inverts the empty container 3B before handing it over to the second circulation conveyor 97 (inversion mode). That is, the first inversion device 91 hands over the empty container 3B with the container facing downwards to the second circulation conveyor 97. On the other hand, when the container 3 received from the first circulation conveyor 96 is a full container 3A, the first inversion device 91 hands it over to the second circulation conveyor 97 without inverting it (through mode). Note that switching between each mode may be done by an operator, or it may be done automatically based on the detection results of a sensor mounted on the first inversion device 91.

[0053] The cleaning unit 92 is a device that cleans the container 3 between the second circulation conveyor 97 and the third circulation conveyor 98. Specifically, when the container 3 received from the second circulation conveyor 97 is an empty container 3B, the cleaning unit 92 cleans the empty container 3B before handing it over to the third circulation conveyor 98 (cleaning mode). That is, the cleaning unit 92 cleans the empty container 3B, which has been turned downwards by the first inversion device 91, by rinsing with water or the like. On the other hand, when the container 3 received from the second circulation conveyor 97 is a real container 3A, the cleaning unit 92 hands it over to the third circulation conveyor 98 without cleaning it (through mode). Note that switching between each mode may be done by an operator, or it may be done automatically based on the detection results of sensors mounted on the cleaning unit 92.

[0054] The second inversion device 93 is a device that inverts the container 3 between the third circulation conveyor 98 and the fourth circulation conveyor 99. Specifically, when the container 3 received from the third circulation conveyor 98 is an empty container 3B, the second inversion device 93 inverts the empty container 3B vertically before handing it over to the fourth circulation conveyor 99 (inversion mode). In other words, the second inversion device 93 returns the downward-facing empty container 3B, which has been cleaned in the cleaning unit 92, to an upward-facing position. On the other hand, when the container 3 received from the third circulation conveyor 98 is a full container 3A, the second inversion device 93 hands it over to the fourth circulation conveyor 99 without inverting it vertically (through mode). Note that switching between each mode may be done by an operator, or it may be done automatically based on the detection results of sensors mounted on the second inversion device 93.

[0055] The sorting station 94 is located at the downstream end of the fourth circulating conveyor 99, at the branching point between the loading area 21 and the bypass line 15 (the second stacking device 111, described later). The decision of whether to supply the container 3 transported to the sorting station 94 to the bypass line 15 or to the fifth circulating conveyor 100 can be made based on the detection results of various sensors installed at the sorting station 94, the fourth circulating conveyor 99, and the fifth circulating conveyor 100. Specifically, the presence or absence of the container 3 on the fifth circulating conveyor 100 when the container 3 arrives at the sorting station 94, the presence or absence of food F inside the container 3, etc., are detected to sort the container 3 at the sorting station 94.

[0056] For example, if container 3 transported to distribution station 94 is actual container 3A, container 3 will pass through distribution station 94 and be handed over to bypass line 15. On the other hand, if the container 3 transported to the sorting station 94 is an empty container 3B, and there is no container 3 (empty container 3B) on the fifth circulation conveyor 100, then container 3 is sorted onto the fifth circulation conveyor 100. Also, if the container 3 transported to the sorting station 94 is an empty container 3B, and there is a container 3 (empty container 3B) on the fifth circulation conveyor 100, then container 3 waits at the sorting station 94. Container 3 waiting at the sorting station 94 may be transferred to the bypass line 15. Container 3 transported to the sorting station 94 may also be transported to the loading area 21 by workers in the loading area 21 themselves, or it may be sorted onto the fifth circulation conveyor 100 by a conveyor switching operation performed by a worker.

[0057] <Bypass Line 15> The bypass line 15 bypasses the loading area 21 and connects the circulating transport section 90 and the upstream transport section 22. The bypass line 15 includes a bypass transport section 110 and a second stacking device 111. The bypass transport section 110 includes a second stacking supply conveyor 115 and a second stacking discharge conveyor 116. The second-stage supply conveyor 115 connects the distribution station 94 and the second-stage stacking device 111. The second stacking discharge conveyor 116 connects the second stacking device 111 and the first upstream transfer conveyor 33.

[0058] The second stacking device 111 stacks the containers 3 transported from the second stacking supply conveyor 115 vertically and discharges the stacked containers 3 to the second stacking discharge conveyor 116. The second stacking device 111 stacks multiple containers 3 such that containers 3 already brought into the second stacking device 111 are positioned above, and containers 3 to be brought into the second stacking device 111 next are positioned below.

[0059] [Food storage method] Next, a food storage method using the food storage system 1 described above will be explained. Below, the operation of each state will be explained, divided into production start (initial state), receiving, receiving / shipping, shipping, and defrosting. Each state may be managed in advance by schedule according to the day of the week and time, or it may be adjusted according to the shipping status, production status, etc. In the following explanation, the state in which actual containers 3A are stacked vertically will be called the actual container stack 103A, and the state in which empty containers 3B are stacked vertically will be called the empty container stack 103B.

[0060] <At the start of production> Figure 3 is a plan view corresponding to Figure 1, which shows the state at the start of production. The production start time shown in Figure 3 is, for example, the start of work on Monday, when no food F is present in the food storage area 2. In this case, as shown in the example, a stack of empty containers 103B is stored in the buffer line 12 and one of the storage units (for example, the first storage unit 40). In the food storage system 1, the number of containers 3 is between two and three times the storage capacity of one of the storage units 40, 41.

[0061] <When received> Figure 4 is a plan view corresponding to Figure 1, which shows the state upon arrival at the warehouse. The receiving state shown in Figure 4 refers to the state in which only the food products F processed in the food processing area are moved into one of the storage units 40, 41 (for example, the second storage unit 41). In this case, from the state at the start of production shown in Figure 1, empty container piles 103B in the first storage unit 40 are sequentially transported toward the loading area 21. Specifically, the empty container piles 103B in the first storage unit 40 are transported one row at a time sequentially from the first internal transport path 44 of the row to be unloaded, starting with those located furthest to the -X side (downstream side) (so-called first-in, first-out). The empty container piles 103B unloaded from the first internal transport path 44 of the row to be unloaded are transported to the unloading device 71 via the first downstream confluence conveyor 75, the first downstream transfer conveyor 78, and the unloading supply conveyor 80. The empty container pile 103B is separated into individual empty containers 3B in the disassembly device 71, and then transported to the disassembly discharge conveyor 81.

[0062] Empty containers 3B transported on the disassembly and discharge conveyor 81 pass through the boxing robot 83 and enter the circulation line 14. Empty containers 3B that have entered the circulation line 14 are transported to the first inversion device 91 via the first circulation conveyor 96. Empty containers 3B transported to the first inversion device 91 are inverted downwards and then transported downstream by the second circulation conveyor 97. Empty containers 3B transported to the second circulation conveyor 97 are washed in the washing section 92 and then transported to the second inversion device 93 via the third circulation conveyor 98. Empty containers 3B transported to the second inversion device 93 are returned to an upward position and then transported downstream by the fourth circulation conveyor 99.

[0063] Empty containers 3B transported to the fourth circulation conveyor 99 are then transported to the sorting station 94. Empty containers 3B transported to the sorting station 94 are then sequentially sorted to the fifth circulation conveyor 100 if there are no empty containers 3B on the fifth circulation conveyor 100. This transports the empty containers 3B to the loading area 21 (work station 25).

[0064] In loading area 21, food F transported from the food processing area is sequentially placed into empty containers 3B at work station 25. Containers 3 (full containers 3A) containing food F are sequentially transported to the first stacking device 23 via the first stacking supply conveyor 31, becoming a stack of full containers 103A, and then handed over to the first stacking discharge conveyor 32. The stack of full containers 103A handed over to the first stacking discharge conveyor 32 is transported by the first upstream transfer conveyor 33 and the second upstream transfer conveyor 34, and then handed over to the second upstream branching conveyor 37. The stack of full containers 103A handed over to the second upstream branching conveyor 37 is handed over to the second internal transport path 64 through the loading opening 48a, and then handed over to the refrigerated warehouse 45.

[0065] Here, the actual container stack 103A is transported to the multiple rows of the second internal transport path 64, filling each row sequentially until it is full. Specifically, the multiple rows of the second upstream branching conveyor 37 and the multiple rows of the second internal transport path 64 are defined as the first row, second row, and third row, respectively, from the +Y side to the -Y side. Then, the actual container stack 103A is first transported to the first row of the second internal transport path 64 via the first row of the second upstream branching conveyor 37. When the second internal transport path 64 in the front row is full, the actual container stack 103A is sequentially transported to the second internal transport path 64 in the rear row via the second upstream branching conveyor 37 in the rear row. The actual container stack 103A brought into the refrigerated warehouse 45 is maintained at a predetermined temperature within the refrigerated warehouse 45. As a result, the food F loaded in the actual container stack 103A is stored at the predetermined temperature.

[0066] <When entering or leaving the warehouse> Figure 5 is a plan view corresponding to Figure 1, which shows the state during loading and unloading. The loading and unloading process shown in Figure 5 refers to a situation where, for example, a stack of actual containers 103A (food F) stored in the second storage unit 41 is unloaded, while food F is sequentially supplied from the food processing area to the loading area 21. Food F stored in storage units 40 and 41 becomes ready for unloading after being stored at a predetermined temperature for a predetermined time.

[0067] First, in order to unload the food products F from the second storage unit 41, the actual container piles 103A loaded on the first row of the second internal transport path 64 are unloaded sequentially, starting with the one located furthest downstream (-X side). Specifically, the actual container piles 103A on the second internal transport path 64 are transferred to the second downstream merging conveyor 76 through the unloading opening 48b, and then transported to the dismantling device 71 via the first downstream transfer conveyor 78 and the second downstream transfer conveyor 79. The actual container piles 103A are then dismantled into individual containers 3A in the dismantling device 71, and then transported to the dismantling discharge conveyor 81.

[0068] The actual containers 3A, transported on the disassembled discharge conveyor 81, are then transported to the boxing robot 83. The boxing robot 83 sequentially places the food F contained in the actual containers 3A into boxes supplied by a box-making machine (not shown). The food F contained in the boxes is then transported to the storage facility via the box transport conveyor 84. The food transported to the storage facility is shipped at the desired timing.

[0069] Meanwhile, the container 3 from which the food F has been removed by the packing robot 83 becomes an empty container 3B and enters the circulation line 14. The empty container 3B that enters the circulation line 14 is transported to the sorting station 94 via the same transport route as when it was first received into storage.

[0070] Empty containers 3B transported to the sorting station 94 are either kept at the sorting station 94 or sorted to the fifth circulation conveyor 100, depending on whether empty containers 3B are present on the fifth circulation conveyor 100. That is, if empty containers 3B are not present on the fifth circulation conveyor 100, empty containers 3B are sorted from the sorting station 94 to the fifth circulation conveyor 100. Empty containers 3B sorted to the fifth circulation conveyor 100 become actual containers 3A when food F is placed inside in the loading area 21. The actual containers 3A are then stacked again by the first stacking device 23 to form a pile of actual containers 103A, which is then transported on the upstream transport conveyors 33 and 34. The pile of actual containers 103A is then transported into the first storage unit 40 via the first upstream branch conveyor 36 and the first internal transport path 44.

[0071] If empty containers 3B are present on the fifth circulation conveyor 100, the empty containers 3B are made to wait at the sorting station 94. Alternatively, the empty containers 3B waiting at the sorting station 94 may be transferred to the bypass line 15. In this case, the empty containers 3B are stacked by the second stacking device 111 to form an empty container pile 103B, which is then transported on the second stacking discharge conveyor 116 and the upstream transfer conveyors 33 and 34. Subsequently, the empty container pile 103B is transported to the buffer line 12 (buffer conveyor 67) via the buffer upstream branching conveyor 35. The transport of the empty container pile 103B to the buffer line 12 is carried out by filling each of the multiple rows of buffer conveyors 67 sequentially, similar to the transport to the storage units 40 and 41. Furthermore, the sorting of empty containers 3B at the sorting station 94 may begin when the row of empty containers 3B starting from the sorting station 94 exceeds a certain length (when the full sensor is activated).

[0072] <Upon departure> Figure 6 is a plan view corresponding to Figure 1, which shows the state when the vehicle is being taken out of storage. The "outbound" process shown in Figure 6 refers to a situation where, for example, only the outbound shipment of a stack of actual containers 103A (food F) stored in the second storage unit 41 is performed. To outbound the food F from the second storage unit 41, the stack of actual containers 103A stored in the second storage unit 41 is outbound row by row from the second internal transport path 64, similar to the inbound and outbound processes described above. The stack of actual containers 103A outbound from the second storage unit 41 is separated into individual containers 3A by the unpacking device 71. The food F contained in each container 3A is transferred to a box by the packing robot 83. After the food F is removed from the container 3 by the packing robot 83, it becomes an empty container 3B and enters the circulation line 14. The empty containers 3B that enter the circulation line 14 are washed in the washing section 92 and then transported to the sorting station 94. The empty containers 3B transported to the sorting station 94 are then handed over to the bypass line 15. The empty containers 3B, which have been transferred to the bypass line 15, are stacked by the second stacking device 111 to form an empty container pile 103B, which is then transported to the buffer line 12 (buffer conveyor 67).

[0073] <When defrosting> Figure 7 is a plan view corresponding to Figure 1, which shows the state during defrosting. The defrosting process shown in Figure 7 refers to a situation where the refrigerated warehouse 45 is defrosted with one of the storage units 40 or 41 (for example, the first storage unit 40) empty. Defrosting is carried out during times when food products F are not being processed, such as on Sundays.

[0074] Defrosting is performed separately for each storage unit 40 and 41. First, in order to defrost the first storage unit 40, all containers 3 are removed from the first storage unit 40. In this case, the containers 3 that have been removed from the first storage unit 40 are transported to the buffer line 12 or the second storage unit 41. With this in place, the inside of the first storage unit 40 is defrosted.

[0075] Next, in order to defrost the second storage unit 41, all containers 3 are removed from the second storage unit 41. In this case, the containers 3 removed from the second storage unit 41 are transported to the buffer line 12 or the first storage unit 40. With the second storage unit 41 in this state, it is defrosted. It is preferable that no food F is present in the food storage area 2 (inside each storage unit 40, 41) during defrosting. However, if food F is present in the food storage area 2, the actual containers 3A can be moved to the storage unit that is not to be defrosted, thereby allowing defrosting to be performed on the empty storage unit. In the food storage system 1 of this embodiment, the above-described process is repeated, thereby automatically transporting the food F (see Figure 2) and storing the food F at a predetermined temperature.

[0076] As described above, the food storage system 1 of this embodiment includes a loading area 21 on which food F can be loaded onto a container (loading section) 3, an upstream transport section (first transport section) 22 on which the container 3 is transported, an internal transport path (storage transport section) 44, 64 connected to the downstream side of the upstream transport section 22 in the transport direction of the container 3, and a storage cabinet 11 on which the container 3 transported on the internal transport path 44, 64 can be stored at a predetermined temperature with the food F loaded on it, a downstream transport section 70 (second transport section) connected to the downstream side of the internal transport path 44, 64 in the transport direction, on which the container 3 that has been unloaded from the storage cabinet 11 is transported, an unloading area 72 provided at the downstream end of the downstream transport section 70 in the transport direction, from which food can be unloaded from the container 3, and a circulating transport section (third transport section) 90 connecting the unloading area 72 and the loading area 21, and returning the container 3 that has passed through the unloading area 72 back to the loading area 21. In this configuration, the container 3 containing the food F is stored in the storage area 11 and then transported to the retrieval area 72. After the food F is removed from the container 3 (actual container 3A) transported to the retrieval area 72, it is transported through the circulation transport section 90 and returned to the loading area 21. In this way, transport, storage, and retrieval can be performed on a single line, which improves work efficiency and reduces manpower compared to conventional methods where transport is done manually. Furthermore, the reduction in manpower in the food storage system 1 means that the only processes that constantly require manpower in the food storage area 2 are the loading area 21 and the retrieval area 72. Therefore, manpower can be allocated to processes other than the food storage area 2 (for example, the food processing area), making it possible to equalize the workload. Furthermore, in this embodiment, the food F contained in the container 3 is stored in a storage room 11 maintained at a predetermined temperature, allowing the food F to be transported to the retrieval area 72 at the appropriate time. This enables the food F to be supplied at the appropriate time. In this case, even if the production quantity on the supply side differs from the quantity required by the demand side, the food F stored in the storage room 11 can be shipped, for example, according to the quantity required by the demand side.

[0077] In the food storage system 1 of this embodiment, the storage unit 11 includes an entrance door 46 that opens and closes an entrance opening 48a for transporting containers 3 from the upstream transport unit 22 to the storage unit 11, and an exit door 47 that is provided separately from the entrance opening 48a and opens and closes an exit opening 48b for transporting containers 3 from the storage unit 11 to the downstream transport unit 70. This configuration reduces the number of times the same door needs to be opened and closed compared to, for example, a case where the loading and unloading openings of the storage unit 11 are shared as a common loading / unloading outlet. This makes it easier to maintain the temperature inside the storage unit 11 at a predetermined level.

[0078] In the food storage system 1 of this embodiment, a buffer line (fourth transport section) 12 is provided that connects the upstream transport section 22 and the downstream transport section 70 while bypassing the storage room 11, and on which the container 3 is transported. With this configuration, unused containers 3 (empty containers 3B) can be stored in the buffer line 12. Therefore, the process of loading food F transported from the food processing area into containers 3 and the process of shipping food F stored in the storage room 11 can be carried out independently at appropriate timings. This allows for efficient system operation. In addition, actual containers 3A containing food F can be preferentially stored in the storage room 11. Furthermore, for example, during defrosting, empty containers 3B that do not contain food F can be stored in the buffer line 12, thereby emptying the storage room 11. As a result, running costs can be reduced by making effective use of the storage room 11, and initial costs can be reduced by making the storage room 11 smaller.

[0079] In the food storage system 1 of this embodiment, a bypass transport unit (fifth transport unit) 110 is provided that bypasses the loading area 21 and connects the circulating transport unit 90 and the buffer line 12. This configuration allows containers 3 to be circulated, stored, or put into storage regardless of whether or not they contain food F. For example, when it is desired to circulate or put into storage containers 3 without loading food F, containers 3 can be transported directly from the circulation line 14 to the buffer line 12 without passing through the loading area 21. This makes it possible to transport unused containers 3 (empty containers 3B) to the buffer line 12 without hindering the loading of food F in the loading area 21. As a result, work efficiency can be improved. Furthermore, even when a container loaded with food F (actual container 3A) is transported along the circulation line 14 during defrosting, containers 3 can be transported from the circulation line 14 to another storage unit via the bypass transport section 110 without passing through the loading area 21. This also helps to shorten transport time.

[0080] The food storage system 1 of this embodiment includes a first-stage stacking device 23 provided in the upstream transport section 22 for stacking containers 3 vertically, and a stage unpacking device 71 provided in the downstream transport section 70 for separating the containers 3 into individual stages. With this configuration, food products F can be stored in the storage room 11 with containers 3 stacked in multiple layers. This allows for three-dimensional storage of food products F, reducing the required floor space and making it easier to increase production. Furthermore, compared to, for example, manual stacking and unstacking, this configuration eliminates heavy labor and reduces the risk of injuries associated with such labor, thereby improving the working environment.

[0081] The food storage system 1 of this embodiment is provided in the bypass transport section 110 and includes a second stacking device 111 for stacking containers 3 vertically. This configuration allows for the transport of a large number of containers 3 without passing through the loading area 21, regardless of whether or not they contain food F. In this case, for example, unused containers 3 can be stored vertically in the buffer line 12, making it easier to prioritize the storage of containers 3 containing food F within the storage facility 11. Therefore, it is easier to increase production while keeping the floor space of the storage facility 11 down. Furthermore, compared to, for example, manual stacking and unstacking, it is possible to improve the working environment by eliminating heavy labor and reducing the risk of injuries associated with heavy labor.

[0082] In the food storage system 1 of this embodiment, the circulation transport unit 90 is provided with a washing unit 92 for washing the container 3. With this configuration, the containers 3 that have passed through the retrieval area 72 can be washed and returned to the upstream transport section 22 in a clean state. This makes maintenance of the storage facility 11 easier.

[0083] In the food storage system 1 of this embodiment, the storage cabinet 11 has a plurality of internal transport paths (storage cabinet transport paths) 44, 64, each separately, and is equipped with a plurality of storage sections 43, 63 whose temperature can be adjusted independently of each other. This configuration allows for the storage of a large number of food items F by providing multiple storage compartments 43 and 63. Furthermore, since the temperature within each storage compartment 43 and 63 can be adjusted independently, managing the food items F becomes easier compared to storing them in a single storage compartment 43 or 63.

[0084] In the food storage system 1 of this embodiment, each of the multiple storage sections 43, 63 is equipped with a heat exchanger having a defrosting function, and when defrosting occurs in any of the multiple storage sections 43, 63, the containers 3 stored in any of the multiple storage sections 43, 63 are transported to the remaining storage sections 43, 63. With this configuration, when defrosting either of the storage sections 43,63, the container 3 installed in one of the storage sections 43,63 is transported to the other storage section 43,63, thereby allowing defrosting of either storage section 43,63 without affecting the food F. This enables efficient system operation and improves maintainability.

[0085] (Other variations) While preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Additions, omissions, substitutions, and other modifications are possible without departing from the spirit of the present invention. The present invention is not limited by the above description, but only by the appended claims. In the embodiments described above, chicken was used as an example of the food F stored in the food storage system 1, but the invention is not limited to this configuration. Food F may be meat other than chicken, and the present invention can be applied to any food that requires storage at a predetermined temperature, such as natto or noodles. In the embodiments described above, a box-shaped container 3 capable of holding food F was used as an example for the mounting section, but the configuration is not limited to this. The mounting section is not limited to a box shape as long as it is capable of holding food F.

[0086] In the embodiment described above, the storage cabinet 11 was configured to have two storage units 40 and 41, but the configuration is not limited to this. The storage unit may be one or more than three. Furthermore, each storage unit may be configured to have a temperature that can be controlled collectively. In the embodiments described above, the storage units 40 and 41 were configured as a one-way system having an inlet opening 48a and an outlet opening 48b, but the configuration is not limited to this. The storage units 40 and 41 may also be configured to perform both loading and unloading through a single loading / unloading opening.

[0087] In the embodiment described above, a configuration was described in which a buffer line 12 is provided separately from the storage unit 11, but the buffer line 12 is not an essential component. In the embodiments described above, a configuration was described that includes a bypass line 15 that bypasses the mounting area 21 and connects the circulating transport unit 90 and the upstream transport unit 22. However, the bypass line 15 is not an essential component. Also, in the embodiments described above, a configuration was described in which the bypass line 15 indirectly connects the circulating transport unit 90 and the buffer line 12 via the upstream transport unit 22. However, the configuration is not limited to this. The bypass line 15 may also directly connect the circulating transport unit 90 and the bypass line 15.

[0088] In the above-described embodiment, a configuration was explained in which the containers 3 are transported and stored in a stacked state by providing stacking devices 23, 111 and a de-stacking device 71, but the configuration is not limited to this. The containers 3 may also be transported and stored in a single layer.

[0089] Furthermore, without departing from the spirit of the present invention, the components in the embodiments described above can be replaced with well-known components as appropriate, and the modifications described above can be combined as appropriate. [Explanation of Symbols]

[0090] 1: Food storage system 3: Container (loading section) 11: Storage 12: Buffer line (4th transport section) 21: Installation Area 22: Upstream transport section (First transport section) 23: First-stage stacking device 43,63:Storage Department 44: First internal transport route (storage room transport section, storage room transport route) 46: Loading door 47: Loading door 48a: Loading opening 48b: Export opening 64: Second internal transport route (storage room transport section, storage room transport route) 70: Downstream transport section (2nd transport section) 71: Step-breaking device 72: Retrieval Area 90: Circulation and transport section (3rd transport section) 92: Cleaning section 110: Bypass transport section (5th transport section) 111: Second-stage stacking device F:Food

Claims

1. The mounting section has a mounting area where food can be placed, The first transport unit on which the mounted unit is transported, The first transport unit includes a storage transport unit connected to the downstream side in the transport direction of the loading unit, and the loading unit, which has been transported on the storage transport unit, is stored in a storage unit capable of being stored at a predetermined temperature with food loaded on it. Of the storage unit transport section, a second transport section is connected to the downstream side in the transport direction, and the mounted unit that has been unloaded from the storage unit is transported there. A removal area is provided at the downstream end in the transport direction of the second transport section, and from which food can be removed from the loading section, A food storage system comprising a third transport unit that connects the aforementioned retrieval area and the aforementioned mounting area, and returns the mounting unit that has passed through the retrieval area back to the mounting area.

2. The aforementioned storage facility is An entrance door that opens and closes an entrance opening for transporting the mounting unit from the first transport unit to the storage unit, The food storage system according to claim 1, further comprising an outlet door provided separately from the loading opening, which opens and closes an outlet opening for loading the loading unit from the storage unit to the second transport unit.

3. A food storage system according to claim 1 or 2, comprising a fourth transport unit that connects the first transport unit and the second transport unit while bypassing the storage unit, and on which the mounted unit is transported.

4. The food storage system according to claim 3, further comprising a fifth transport unit that bypasses the aforementioned mounting area and connects the third transport unit and the fourth transport unit.

5. A first stacking device is provided in the first transport section and stacks the mounting sections vertically, A food storage system according to claim 1 or claim 2, further comprising a device provided in the second transport section and further comprising a device for separating the loading section into individual stages.

6. A second stacking device is provided in the fifth transport section and stacks the mounting sections vertically, The food storage system according to claim 4, further comprising a device provided in the second transport section and further comprising a step-breaking device that divides the loading section into individual steps.

7. The food storage system according to claim 1 or claim 2, wherein the third transport unit is provided with a cleaning unit for cleaning the mounting unit.

8. The storage transport section comprises a plurality of storage transport paths, each having an upstream end branching off from the first transport section and a downstream end merging with the second transport section. The food storage system according to claim 1 or claim 2, wherein the storage facility has separate transport paths for each of the multiple storage facilities and comprises a plurality of storage sections whose temperature can be adjusted independently of each other.

9. Each of the aforementioned storage units is equipped with a heat exchanger having a defrosting function. The food storage system according to claim 8, wherein, during defrosting of any of the storage units, the mounted unit housed in any of the storage units is transported to the remaining storage units among the plurality of storage units.

10. A method for storing food using the food storage system described in claim 1 or claim 2.

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