Nursery box supply device with double nursery box supply unit

Abstract

The present invention relates to a seedling box feeding conveyor with multiple seedling box feeders, which is provided with multiple seedling box feeders at the upper portion and spaced apart from each other in the front and rear directions, the seedling box feeders are respectively stacked with multiple seedling boxes at the inner side and sequentially feed the seedling boxes one by one to the lower portion, the seedling box feeding conveyor with multiple seedling box feeders comprises: a conveyor, which is provided with multiple seedling box feeders at the upper portion and spaced apart from each other in the front and rear directions, has a main frame at the upper portion and arranged spaced apart from each other along the two sides and formed longer in the front and rear directions, has a control driving part and a non-control driving part arranged in sequence from the rear to the front while being spaced apart from each other in the front and rear directions between the pair of main frames and axially connected to the main frame on the two sides for moving the seedling boxes installed at the upper portion, has multiple support frames extending to the ground and spaced apart from each other at the lower portion of the main frame, has a lifting frame connected with the support frame and capable of sliding up and down on the support frame at the lower portion of the support frame, and has a height adjusting body threadedly combined with the lower portion of the lifting frame to move the lifting frame up and down at the lower portion of the lifting frame; a first feeding sensing sensor and a second feeding sensing sensor, which are arranged spaced apart from each other from the rear to the front on the main frame of the conveyor and respectively arranged at the lower portion of the seedling box feeder installed at the upper portion of the main frame to sense the seedling boxes fed to the conveyor by each seedling box feeder; a control motor and a non-control motor, which are connected to the main frame at the lower portion of the control driving part and the non-control driving part of the conveyor to respectively provide the control driving part and the non-control driving part with a rotating force; and a control part, which is arranged on the conveyor, receives the signals of the first feeding sensing sensor and the second feeding sensing sensor, and controls the operation of the control motor and the non-control motor according to the signals of the first feeding sensing sensor and the second feeding sensing sensor.

Description

Technical Field

[0001] This invention relates to a seedling box supply conveyor with multiple seedling box suppliers. More specifically, the seedling box supply conveyor has multiple seedling box suppliers spaced apart on a conveyor for transferring and supplying seedling boxes. Seedling boxes are sequentially supplied to the conveyor from the rearmost seedling box supplier. When a problem occurs with the rearmost seedling box supplier, preventing the supply of seedling boxes to the conveyor, seedling boxes are supplied to the conveyor from the seedling box supplier in front of the problematic supplier. Thus, while the problem with the problematic seedling box supplier is being resolved, seedling boxes can be continuously and smoothly supplied to the conveyor. When the seedling box supplier that has resolved the problem resumes supplying seedling boxes to the conveyor, the seedling box supplier in front of the problematic supplier stops working, thereby ensuring a smooth and continuous supply of seedling boxes to the conveyor.

[0002] Furthermore, the present invention relates to a seedling box supply process of a seedling box supply conveyor having multiple seedling box suppliers. More specifically, the seedling box supply process of the seedling box supply conveyor having multiple seedling box suppliers, based on the conveyor which is divided into a control drive unit and a non-control drive unit, can continue to supply and transfer seedling boxes smoothly to the conveyor even when one of the multiple seedling box suppliers malfunctions.

[0003] Furthermore, the present invention relates to a seedling box supply device with dual seedling box supply units. More specifically, the seedling box supply device with dual seedling box supply units has dual seedling box supply units spaced apart from each other along the front and rear sides on a conveyor for transferring seedling boxes. When one of the dual seedling box supply units is working, the other stops working. Moreover, when one of the seedling box supply units that supplies seedling boxes to the conveyor malfunctions and cannot supply seedling boxes to the conveyor, the other seedling box supply unit takes over the malfunctioning seedling box supply unit and temporarily and automatically alternates working to supply seedling boxes to the conveyor. Thus, even when the operator is repairing or inspecting the malfunctioning seedling box supply unit, it can ensure that seedling boxes are smoothly supplied to the conveyor. After the malfunctioning seedling box supply unit has been repaired or inspected, the repaired or inspected seedling box supply unit supplies seedling boxes to the conveyor again, thereby enabling the seedling boxes to be smoothly and continuously supplied to the conveyor. Background Technology

[0004] Generally speaking, in order to cultivate paddy field crops such as rice seed used for rice planting (rice cultivation) and dryland crops such as onions and scallions, a seeder is used to carry out simple and accurate sowing and fertilization in the dug furrows.

[0005] The seeder supplies soil and seeds to the seedling tray by inserting the seedling tray.

[0006] At this point, seedling boxes need to be continuously supplied to the seeder. In one process after another, the operator supplies them one by one by hand from the supply side.

[0007] However, this method requires an operator to be always positioned at the seedling tray supply point, which is unsuitable for the labor shortage in rural areas.

[0008] To solve the problems mentioned above, people have developed and used seedling box supply devices as disclosed in Korean Patent Publication No. 10-1831111, Korean Patent Publication No. 10-1817039, Korean Patent Publication No. 10-1974329, Korean Patent Publication No. 10-2242222, Korean Patent Publication No. 10-2347573, and Korean Patent Publication No. 10-1886218.

[0009] However, as described above, because the conveyor has a single seedling box supply device, multiple seedling boxes of various shapes and sizes cannot be accurately supplied to the conveyor one after another in sequence. When the seedling box supply device malfunctions due to seedling boxes getting stuck, the stuck seedling boxes need to be removed or reordered before being supplied to the seedling box supply device. As a result, during the maintenance of the seedling box supply device, seedling boxes cannot be supplied to the conveyor normally, which often leads to a decrease in the automatic supply rate and operability of seedling boxes.

[0010] Furthermore, as described above, since the conveyor is equipped with a single seedling box supply unit, when the seedling box supply unit malfunctions due to reasons such as the seedling box getting stuck or the operator failing to supply the seedling box in a timely manner, it is necessary to remove the seedling box from the supply unit and then supply it again. As a result, during the maintenance or inspection of the seedling box supply unit, the seedling box cannot be supplied to the conveyor normally, which often leads to a decrease in the automatic supply rate and operability of the seedling box.

[0011] Accordingly, there is a need to provide a seedling box supply conveyor with multiple seedling box feeders to solve the problems in the prior art as described above.

[0012] Furthermore, there is a need to provide a seedling box supply process with a seedling box supply conveyor having multiple seedling box suppliers, in order to solve the problems in the prior art as described above.

[0013] Furthermore, there is a need to provide a seedling box supply device with dual seedling box supply units to solve the problems in the prior art as described above.

[0014] [Existing Technical Documents]

[0015] [Patent Literature]

[0016] (Patent Document 1) Korean Patent Publication No. 10-1831111

[0017] (Patent Document 2) Korean Patent Publication No. 10-1817039,

[0018] (Patent Document 3) Korean Patent Publication No. 10-1974329,

[0019] (Patent Document 4) Korean Patent Publication No. 10-2242222,

[0020] (Patent Document 5) Korean Patent Publication No. 10-2347573

[0021] (Patent Document 6) Korean Patent Publication No. 10-1886218. Summary of the Invention

[0022] Technical problems to be solved

[0023] This invention addresses the problems existing in the prior art, aiming to provide a seedling box supply conveyor with multiple seedling box feeders. Compared to the prior art, which uses a single seedling box feeder on the conveyor, multiple seedling boxes of various shapes and sizes cannot be accurately supplied sequentially one after another. Furthermore, when the seedling box feeder malfunctions due to seedling boxes getting stuck, the stuck boxes need to be removed or reordered before being supplied. This results in a decrease in automatic seedling box supply rate and operability during feeder maintenance. In contrast, this invention provides a more efficient and reliable seedling box supply system. The conveyor for transferring seedling boxes is equipped with multiple seedling box feeders spaced apart from each other. Seedling boxes are supplied to the conveyor sequentially from the rear seedling box feeders. When a problem occurs with a rear seedling box feeder, preventing the supply of seedling boxes to the conveyor, seedling boxes are supplied to the conveyor from the seedling box feeder in front of the problematic feeder. This ensures a continuous and smooth supply of seedling boxes to the conveyor while the problem with the problematic feeder is being resolved. When the seedling box feeder that has resolved the problem resumes supplying seedling boxes to the conveyor, the seedling box feeder in front of the problematic feeder stops working, thus ensuring a smooth and continuous supply of seedling boxes to the conveyor.

[0024] Furthermore, this invention addresses the problems existing in the prior art described above. Its purpose is to provide a seedling box supply process using a conveyor with multiple seedling box feeders. This is in contrast to the prior art, where a single seedling box feeder on the conveyor prevents the accurate, sequential supply of seedling boxes of various shapes and sizes. Furthermore, when the feeder malfunctions due to seedling boxes getting stuck, the stuck boxes need to be removed or reordered before being supplied. This results in disruptions to seedling box supply during feeder maintenance, leading to a decrease in automatic seedling box supply rate and workability. This invention features multiple seedling box suppliers spaced apart on a conveyor for transporting seedling boxes. Seedling boxes are sequentially supplied to the conveyor from the rearmost seedling box supplier. When a problem occurs at the rearmost seedling box supplier, preventing the supply of seedling boxes to the conveyor, seedling boxes are supplied to the conveyor from the seedling box supplier in front of the problematic supplier. This ensures a continuous and smooth supply of seedling boxes to the conveyor while the problem at the problematic supplier is being resolved. When the resolved seedling box supplier resumes supplying seedling boxes to the conveyor, the seedling box supplier in front of the resolved supplier stops operating, thus ensuring a smooth and continuous supply of seedling boxes to the conveyor.

[0025] Furthermore, this invention addresses the problems existing in the prior art described above. Its purpose is to provide a seedling box supply device with dual seedling box supply units. This differs from the prior art, where a single seedling box supply unit on the conveyor causes problems such as seedling boxes getting stuck or operators failing to supply them in time. In such cases, the seedling box supply unit needs to be removed from the original unit before supplying new seedling boxes, leading to delays in supplying seedling boxes to the conveyor during maintenance or inspection. This results in a frequent decrease in the automatic supply rate and workability of the seedling boxes. In contrast, this invention provides a seedling box supply device with dual seedling box supply units spaced apart along the front and rear sides of the conveyor for transferring seedling boxes. In the dual seedling box supply unit, when one of the two seedling box supply units is working, the other stops working. Moreover, when one of the seedling box supply units malfunctions and is unable to supply seedling boxes to the conveyor, the other seedling box supply unit takes over and temporarily and automatically alternates working to supply seedling boxes to the conveyor. Thus, even if the operator is repairing or inspecting the malfunctioning seedling box supply unit for a short or long period of time, the seedling boxes can be supplied to the conveyor smoothly. After the malfunctioning seedling box supply unit has been repaired or inspected, the repaired or inspected seedling box supply unit will supply seedling boxes to the conveyor again, thereby ensuring a smooth and continuous supply of seedling boxes to the conveyor.

[0026] Technical solution

[0027] To achieve the aforementioned objective, the present invention provides a seedling box supply conveyor with multiple seedling box feeders. Multiple seedling box feeders are spaced apart along the front-to-back direction at the top. These feeders stack multiple seedling boxes on their inner sides and sequentially supply seedling boxes one after another downwards. The seedling box supply conveyor includes: a conveyor with multiple seedling box feeders spaced apart along the front-to-back direction at the top; a main frame that is spaced apart along both sides and forms a relatively long front-to-back direction at the top; control drive units and non-control drive units arranged sequentially from back to front between a pair of main frames, spaced apart along the front-to-back direction and axially connected to the main frames on both sides, for moving the seedling boxes installed at the top; multiple support frames extending towards the ground spaced apart at the bottom of each main frame; and a connection between the support frame and the support frame. A lifting frame connected to and capable of sliding up and down on a support frame is provided at the lower part of each lifting frame, with a height adjustment body threaded into the lower part of the lifting frame to allow the lifting frame to move up and down; a first supply sensing sensor and a second supply sensing sensor are provided at intervals from rear to front on the main frame of the conveyor, and are respectively located at the lower part of the seedling box feeder installed on the upper part of the main frame to sense the seedling boxes supplied to the conveyor through each seedling box feeder; a control motor and a non-control motor are connected and installed on the main frame below the control drive unit and the non-control drive unit of the conveyor, respectively, for providing rotational force to the control drive unit and the non-control drive unit; a control unit is installed on the conveyor, receives signals from the first supply sensing sensor and the second supply sensing sensor, and controls the operation of the control motor and the non-control motor according to the signals from the first supply sensing sensor and the second supply sensing sensor.

[0028] Furthermore, in order to achieve the above-mentioned objective, the present invention provides a seedling box supply process for a seedling box supply conveyor with multiple seedling box suppliers, wherein the seedling box supply conveyor with multiple seedling box suppliers includes: a conveyor having multiple seedling box suppliers spaced apart along the front and rear sides, wherein multiple seedling boxes are stacked on the inner side of each seedling box supplier and the seedling boxes are sequentially supplied downwards one after another; a main frame that is spaced apart along both sides and formed in a long front and rear direction is located at the lower part of the seedling box suppliers and receives seedling boxes from the seedling box suppliers; and a pair of main frames are spaced apart along the front and rear sides and are axially connected to the main frames on both sides, while the seedling boxes are supplied from the rear to the front. The conveyor is equipped with a control drive unit and a non-control drive unit for transferring seedling boxes installed on the upper part. Multiple support frames extending towards the ground are spaced apart on the lower part of each main frame. A lifting frame connected to and capable of sliding up and down on each support frame is installed at the lower part of each support frame. A height adjustment body threaded into the lower part of each lifting frame allows for vertical movement. A first supply sensing sensor and a second supply sensing sensor are spaced apart from each other from rear to front on the main frame of the conveyor, each located below the seedling box feeder installed on the upper part of the main frame to sense the seedling boxes supplied to the conveyor through each feeder. A control motor and a non-control motor are also included. The conveyor has a main frame connected to and mounted on the lower part of the control drive unit and the non-control drive unit, respectively, for providing rotational force to the control drive unit and the non-control drive unit. The control unit, mounted on the conveyor, receives signals from the first supply sensing sensor and the second supply sensing sensor, and controls the operation of the control motor, the non-control motor, and each seedling box feeder according to the signals from the first supply sensing sensor and the second supply sensing sensor. Here, the seedling box feeding process includes: a first step, driving the control unit to start the operation of the control motor, the non-control motor, the control drive unit, the non-control drive unit, and the seedling box feeder located above the control drive unit; a second step, feeding the seedling box from the seedling box located above the control drive unit... The seedling feeder supplies seedling boxes one by one to the control drive unit, and simultaneously senses the supplied seedling boxes through the first supply sensing sensor and transmits the signal to the controller; in the third step, the first supply sensing sensor senses that the seedling box feeder located above the control drive unit has a problem and the seedling boxes have not been supplied to the control drive unit, and transmits the signal to the control unit; in the fourth step, the operation of the seedling box feeder located above the control drive unit, the control motor, and the control drive unit is stopped, and at the same time, the seedling box feeder located in front of the stopped seedling box feeder is driven to supply seedling boxes to the non-control drive unit, and the second supply sensing sensor senses the seedling boxes supplied to the non-control drive unit and transmits the signal to the control unit;In the fifth step, the control unit receives the signal from the second supply sensing sensor and transmits a reminder or light signal to the operator, thereby enabling the operator to resolve the problem occurring on the seedling box feeder located above the control drive unit, and resume supplying seedling boxes to the control drive unit. Simultaneously, the operation of the seedling box feeder located in front of the feeder that has resumed supplying is stopped.

[0029] Furthermore, in order to achieve the above-mentioned objective, a seedling box supply device with dual seedling box supply units provided by the present invention includes: a conveyor for transporting seedling boxes; a pair of seedling box supply units, which are arranged alternately along the front and rear sides of the upper part of the conveyor, each receiving seedling boxes from the upper part inward and supplying the seedling boxes received inward to the upper part of the conveyor, and the seedling boxes supplied to the upper part of the conveyor are transported by the conveyor, and the other stops working when one is working; and a control unit, which is provided on the conveyor for controlling the operation of the conveyor and the dual seedling box supply units respectively.

[0030] Beneficial effects

[0031] According to the present invention, a seedling box supply conveyor having multiple seedling box feeders first supplies seedling boxes to the conveyor from the last of the multiple seedling box feeders located on the upper part of the conveyor. When a problem occurs during the supply of seedling boxes to the conveyor and the control unit receives a signal that a seedling box has failed to be supplied to the conveyor, the control unit controls the rotational force of the control motor transmitted to the control drive unit where the problem occurred, so that the control drive unit stops working. At the same time, the control drive unit drives the seedling box feeder located in front of the seedling box feeder where the problem occurred, thereby sequentially supplying seedling boxes to the conveyor. Thus, even while the problem of the seedling box feeder where the problem occurred is being resolved, seedling boxes can be supplied to the conveyor smoothly. Moreover, when the seedling box feeder whose problem has been resolved supplies seedling boxes to the conveyor again, the control unit stops the operation of the seedling box feeder located in front of the seedling box feeder whose problem has been resolved, so that seedling boxes are not repeatedly supplied to the conveyor, and seedling boxes can be smoothly supplied and transferred to the conveyor.

[0032] Furthermore, according to the seedling box supply process of the seedling box supply conveyor with multiple seedling box suppliers of the present invention, seedling boxes are first supplied to the conveyor from the seedling box supplier located at the rear of the multiple seedling box suppliers provided on the upper part of the conveyor. When a problem occurs during the supply of seedling boxes to the conveyor and the control unit receives a signal that the seedling box has failed to be supplied to the conveyor, the rotational force of the control motor transmitted to the control drive unit where the problem occurred is controlled to stop the operation of the control drive unit. At the same time, the seedling box supplier located in front of the seedling box supplier where the problem occurred is driven to supply seedling boxes to the conveyor in sequence. Thus, while the problem of the seedling box supplier where the problem occurred is being resolved, the seedling boxes can be supplied to the conveyor smoothly. Moreover, when the seedling box supplier whose problem has been resolved supplies seedling boxes to the conveyor again, the operation of the seedling box supplier located in front of the seedling box supplier whose problem has been resolved is stopped according to the control of the control unit. Thus, the seedling boxes are not repeatedly supplied to the conveyor, and the seedling boxes can be supplied and transferred to the conveyor smoothly.

[0033] Furthermore, according to the seedling box supply device with dual seedling box supply units of the present invention, dual seedling box supply units for supplying seedling boxes are provided at intervals along the front and rear sides of the conveyor for transferring seedling boxes. When one of the dual seedling box supply units is working, the other stops working. Moreover, when one of the seedling box supply units that supplies seedling boxes to the conveyor malfunctions and is unable to supply seedling boxes to the conveyor, the other seedling box supply unit takes over the malfunctioning seedling box supply unit and temporarily and automatically alternates working to supply seedling boxes to the conveyor. Thus, it is not limited by the short or long time required for the operator to repair or inspect the malfunctioning seedling box supply unit, and it can ensure that the seedling boxes are supplied to the conveyor smoothly. After the malfunctioning seedling box supply unit has been repaired or inspected, the repaired or inspected seedling box supply unit supplies seedling boxes to the conveyor again, thereby enabling the seedling boxes to be supplied to the conveyor smoothly and continuously. Attached Figure Description

[0034] Figure 1 This is a schematic perspective view of the seedling box supply conveyor with multiple seedling box feeders of the present invention.

[0035] Figures 2 to 3 This is a schematic front view of the seedling box supply conveyor with multiple seedling box feeders of the present invention.

[0036] Figures 4 to 5 This is a schematic perspective view of the seedling box supply conveyor with multiple seedling box feeders of the present invention.

[0037] Figures 6 to 7 This is a schematic front view of the seedling box supply conveyor with multiple seedling box feeders of the present invention.

[0038] Figure 8 This is a schematic diagram of the seedling box supply process of the seedling box supply conveyor with multiple seedling box suppliers according to the present invention.

[0039] Figure 9 This is a schematic perspective view illustrating the seedling box supply process of the seedling box supply conveyor having multiple seedling box suppliers according to the present invention.

[0040] Figures 10 to 11 This is a schematic front view of the seedling box supply conveyor with multiple seedling box feeders of the present invention.

[0041] Figures 12 to 13 This is a schematic perspective view of the seedling box supply conveyor with multiple seedling box feeders of the present invention.

[0042] Figures 14 to 15 This is a schematic front view of the seedling box supply conveyor with multiple seedling box feeders of the present invention.

[0043] Figure 16 This is a photograph of the seedling box supply device with dual seedling box supply units of the present invention viewed from an oblique angle.

[0044] Figure 17 This is a photograph showing the seedling box supply device with dual seedling box supply units of the present invention viewed from the side.

[0045] Figure 18 This is a photograph showing the seedling box supply device with dual seedling box supply units of the present invention viewed from the front.

[0046] Figures 19 to 28 This is a partially enlarged photograph of the seedling box supply device with a dual seedling box supply unit according to the present invention.

[0047] Figure 29 This is a photograph showing the seedling box supply device of the present invention with a dual seedling box supply unit viewed from the rear. Detailed Implementation

[0048] [First Implementation] Conveyor for Seedling Box Supply

[0049] The specific details for carrying out the present invention will now be described in more detail with reference to the accompanying drawings.

[0050] Reference Figures 1 to 7According to the present invention, a seedling box supply conveyor having multiple seedling box feeders is provided, wherein multiple seedling box feeders 10 are arranged at intervals along the front and back of the upper part, and the seedling box feeders 10 are stacked on the inner side and sequentially supply seedling boxes one after another to the lower part. The seedling box supply conveyor having multiple seedling box feeders includes: a conveyor 24, wherein multiple seedling box feeders 10 are installed at intervals along the front and back of the upper part, and the upper part has a spaced arrangement along both sides and along the front and back. A relatively long main frame 12 is formed. Between a pair of main frames 12, spaced apart front to back and axially connected to the main frames 12 on both sides, control drive units 14 and non-control drive units 16 are sequentially arranged from back to front for moving the seedling boxes installed on top. Multiple support frames 18 extending towards the ground are spaced apart at the lower part of each main frame 12. At the lower part of each support frame 18, a lifting frame 20 is connected to and can slide up and down on the support frame 18. Each of the 20 components has a height adjustment body 22 at its lower part that is threadedly connected to the lower part of the lifting frame 20 to allow the lifting frame 20 to move up and down; a first supply sensing sensor 26 and a second supply sensing sensor 28 are arranged at intervals from rear to front on the main frame 12 of the conveyor 24, and are respectively located at the lower part of the seedling box feeder 10 installed on the upper part of the main frame 12 to sense the seedling boxes supplied to the conveyor 24 through each seedling box feeder 10; a control motor 30 and a non-control motor 32 are connected and arranged on the main frame 12 at the lower part of the control drive unit 14 and the non-control drive unit 16 of the conveyor 24, and are used to provide rotational force to the control drive unit 14 and the non-control drive unit 16 respectively; a control unit 34 is arranged on the conveyor 24, receives signals from the first supply sensing sensor 26 and the second supply sensing sensor 28, and controls the operation of the control motor 30, the non-control motor 32 and each seedling box feeder 10 according to the signals from the first supply sensing sensor 26 and the second supply sensing sensor 28.

[0051] First, the seedling box supply conveyor of the present invention, which has multiple seedling box feeders, has multiple seedling box feeders 10 spaced apart along the front and back sides at the top. These seedling box feeders 10 stack multiple seedling boxes on their inner sides and supply seedling boxes one after another sequentially downwards. The present invention includes a conveyor 24, which has multiple seedling box feeders 10 spaced apart along the front and back sides at the top. The conveyor 24 has a main frame 12 at the top, arranged spaced apart along both sides and forming a relatively long front and back side. Between a pair of main frames 12, there are... A control drive unit 14 and a non-control drive unit 16 are arranged sequentially from back to front, with each side axially connected to the main frame 12 for transferring the seedling box installed on the upper part. Multiple support frames 18 extending towards the ground are arranged at intervals on the lower part of each main frame 12. A lifting frame 20 connected to the support frame 18 and capable of sliding up and down on the support frame 18 is arranged on the lower part of each support frame 18. A height adjustment body 22 is arranged on the lower part of each lifting frame 20, which is threaded to the lower part of the lifting frame 20 to allow the lifting frame 20 to move up and down.

[0052] Here, the seedling box feeder 10 adopts conventional means, and can selectively adopt one or more of the following methods: pneumatic, hydraulic, mechanical, electronic, or a combination of two or more. As long as the means can supply multiple seedling boxes stacked in the seedling box feeder 10 one after another to the conveyor 24 located at the lower part of the seedling box feeder 10 (described later), then no matter what method or means is used, it is acceptable.

[0053] In addition, such as Figure 1 , Figure 4 , Figure 5 As shown, the control drive unit 14 and the non-control drive unit 16 provided on the conveyor 24 can be composed of either a roller 44 or a pulley 46. The control drive unit 14 is controlled by the control unit 34 described later. When a problem occurs during the process of the seedling box feeder 10 located above the control drive unit 14 supplying seedling boxes to the conveyor 24, such as the seedling box getting stuck or insufficient seedling box supply, the control motor 30 that provides rotational force to the control drive unit 14 located below the seedling box feeder 10 with the problem is shut off until the problem of the seedling box feeder 10 with the problem is resolved. The non-control drive unit 16 always receives rotational force from the non-control motor 32 and can rotate when any of the multiple seedling box feeders 10 is working.

[0054] And, as Figure 2As shown, the conveyor 24 can be divided into a controlled conveyor 36 having a control drive unit 14 and a non-controlled conveyor 38 having a non-control drive unit 16. Multiple controlled conveyors 36 with control drive units 14 can be configured and used in sequence after the non-controlled conveyors 38 with non-control drive units 16.

[0055] Moreover, such as Figures 3 to 4 As shown, a passive drive unit 40 can also be provided between the control drive unit 14 and the non-control drive unit 16 of the conveyor 24. The passive drive unit 40 is arranged at intervals along the front and rear and is connected to the main frame 12 on both sides. At the same time, it does not receive the rotational force of the control motor 30 and the non-control motor 32. It is used to transfer the seedling box installed on the upper part.

[0056] At this time, the function of the passive drive unit 40 is that when the supply of seedling boxes from the rear to the front is not smooth, the seedling boxes can wait on the passive drive unit 40, thereby preventing problems such as overlap when the seedling box supplier 10 located in front of the problematic seedling box supplier 10 supplies seedling boxes to the conveyor 24. When the problem of the problematic seedling box supplier 10 is resolved and it successfully supplies seedling boxes to the conveyor 24 again, the seedling boxes waiting on the passive drive unit 40 are moved forward by receiving the rotational force of the control drive unit 14 at the rear of the passive drive unit 40.

[0057] The seedling box supply conveyor of the present invention is provided with a first supply sensing sensor 26 and a second supply sensing sensor 28. The first supply sensing sensor 26 and the second supply sensing sensor 28 are arranged at intervals from rear to front on the main frame 12 of the conveyor 24, and each is respectively arranged at the lower part of the seedling box supply device 10 installed on the upper part of the main frame 12 to sense each seedling box supplied to the conveyor 24 through each seedling box supply device 10.

[0058] Here, the first supply sensing sensor 26 and the second supply sensing sensor 28 respectively sense the seedling boxes supplied from the seedling box feeder 10 located above them to the conveyor 24 and transmit the corresponding signals to the control unit 34 described later. When the first supply sensing sensor 26 senses that the seedling box has not been supplied to the conveyor 24 for more than the time set by the operator, the control unit 34 will control the rotation force of the control motor 30 that provides rotation force to the control drive unit 14 to the off state until the problem of the seedling box feeder 10 with the problem is resolved. During this period, the operation of the seedling box feeder 10 located in front of the seedling box feeder 10 with the problem will be controlled to the on state.

[0059] The seedling box supply conveyor of the present invention is provided with a control motor 30 and a non-control motor 32. The control motor 30 and the non-control motor 32 are connected to the main frame 12 at the lower part of the control drive unit 14 and the non-control drive unit 16 of the conveyor 24, respectively, and are used to provide rotational force to the control drive unit 14 and the non-control drive unit 16.

[0060] Furthermore, the seedling box supply conveyor of the present invention is provided with a control unit 34, which is disposed on the conveyor 24, receives signals from the first supply sensing sensor 26 and the second supply sensing sensor 28, and controls the operation of the control motor 30, the non-control motor 32 and each seedling box supply device 10 according to the signals from the first supply sensing sensor 26 and the second supply sensing sensor 28.

[0061] Preferably, a speaker (not shown) and an alarm light are provided on the control unit 34 so that when the first supply sensing sensor 26 and the second supply sensing sensor 28 are received and it is determined that the seedling box is not being supplied to the conveyor normally, a reminder or light signal is transmitted to the operator.

[0062] Furthermore, multiple sensing sensors 42 can be installed on the conveyor 24 to transmit signals to the control unit 34 through sensing the seedling box. Thus, even if the seedling box on the conveyor is not moved normally from the back to the front, the operation of the seedling box feeder 10, the control motor 30 and the non-control motor 32 can be organically switched to the on or off state through the control of the control unit 34.

[0063] Here, the first supply sensing sensor 26, the second supply sensing sensor 28, and the sensing sensor 42 can be selected from proximity sensors, light sensors, ultrasonic sensors, and limit switches. However, any sensor can be used as long as it is a means that can sense the seedling box supplied from the seedling box supplier 10 to the conveyor 24 or can sense the seedling box that is being moved on the conveyor 24 and transmit the signal to the control unit 34.

[0064] In addition, the working process of the seedling box supply conveyor with multiple seedling box feeders as described above is as follows.

[0065] First, under the control of the control unit 34, the control motor 30, the non-control motor 32, and the seedling box feeder 10 located on the upper part of the control drive unit 14 start to work, so that the seedling boxes are transported one after another from the rear to the front.

[0066] At this time, if the seedling box supplier 10 located on the upper part of the control drive unit 14 cannot smoothly supply seedling boxes to the control drive unit 14 due to reasons such as the seedling boxes being stuck or the number of seedling boxes being insufficient, the first supply sensing sensor 26 senses this situation and shuts down the operation of the seedling box supplier 10 located on the upper part of the control drive unit 14 and the control drive unit 14, and turns on the seedling box supplier 10 located on the upper part of the non-control drive unit 16 to supply seedling boxes to the non-control drive unit 16. At the same time, the control unit 34 transmits a reminder or light signal to the operator, and the operator who receives the reminder or light signal will investigate the cause of the problem and solve the problem. When the problem is solved and the seedling box supplier 10 located on the upper part of the control drive unit 14 can supply seedling boxes to the control drive unit 14 normally, the operation of the seedling box supplier 10 located on the upper part of the non-control drive unit 16 is turned off according to the control of the control unit 34.

[0067] According to the present invention, a seedling box supply conveyor having multiple seedling box feeders first supplies seedling boxes to the conveyor 24 from the seedling box feeder 10 located at the rearmost of the multiple seedling box feeders 10 disposed on the upper part of the conveyor 24. When a problem occurs during the supply of seedling boxes to the conveyor 24 and the control unit 34 receives a signal that a seedling box has failed to be supplied to the conveyor 24, it controls the rotational force of the control motor 30 transmitted to the control drive unit 14 where the problem occurred, so that the control drive unit 14 stops working, and at the same time drives the seedling box feeder 10 located where the problem occurred. The seedling box feeder 10 in front of the seedling box feeder 20 sequentially supplies seedling boxes to the conveyor 24. Thus, even when the problem of the seedling box feeder 10 that has a problem is being resolved, the seedling box feeder 10 can still be supplied to the conveyor 24 smoothly. Moreover, when the seedling box feeder 10 whose problem has been resolved supplies seedling boxes to the conveyor 24 again, the operation of the seedling box feeder 10 located in front of the seedling box feeder 10 whose problem has been resolved is stopped according to the control of the control unit 34. Thus, the seedling boxes are not repeatedly supplied to the conveyor 24, and the seedling boxes can be smoothly supplied and transferred to the conveyor 24.

[0068] [Second Implementation Form] Seedling Box Supply Process

[0069] The specific details for carrying out the present invention will now be described in more detail with reference to the accompanying drawings.

[0070] Reference Figures 8 to 15According to the present invention, a seedling box supply process using a seedling box supply conveyor with multiple seedling box suppliers is provided, wherein the seedling box supply conveyor with multiple seedling box suppliers includes: a conveyor 24, wherein multiple seedling box suppliers 10 are arranged at intervals along the front and rear, wherein multiple seedling boxes are stacked on the inner side of each seedling box supplier 10 and the seedling boxes are supplied sequentially one after another to the lower part; a main frame 12 is provided at the upper part, which is arranged at intervals along both sides and is formed to be relatively long along the front and rear, the main frame 12 is located at the lower part of the seedling box suppliers 10 and receives seedling boxes from the seedling box suppliers 10; and seedling boxes are arranged at intervals along the front and rear between a pair of main frames 12 and are respectively axially connected to the main frame 12 on both sides, while simultaneously supplying seedling boxes from the rear to the lower part of the seedling box suppliers 10. A control drive unit 14 and a non-control drive unit 16 are sequentially arranged at the front for transferring the seedling boxes installed on the upper part. Multiple support frames 18 extending towards the ground are spaced apart at the lower part of each main frame 12. A lifting frame 20 connected to and capable of sliding up and down on each support frame 18 is provided at the lower part of each support frame 18. A height adjustment body 22, threadedly engaged with the lower part of each lifting frame 20, is provided at the lower part of each lifting frame 20 to allow for vertical movement. A first supply sensing sensor 26 and a second supply sensing sensor 28 are spaced apart from each other from rear to front on the main frame 12 of the conveyor 24, and each is respectively mounted on the seedling box feeder 1 installed on the upper part of the main frame 12. The lower part of the 0 senses the supply of each seedling box to the conveyor 24 via each seedling box feeder 10; the control motor 30 and the non-control motor 32 are connected and installed on the main frame 12 at the lower part of the control drive unit 14 and the non-control drive unit 16 of the conveyor 24, respectively, to provide rotational force to the control drive unit 14 and the non-control drive unit 16; the control unit 34 is installed on the conveyor 24, receives signals from the first supply sensing sensor 26 and the second supply sensing sensor 28, and controls the operation of the control motor 30, the non-control motor 32 and each seedling box feeder 10 according to the signals from the first supply sensing sensor 26 and the second supply sensing sensor 28. Here, the seedling box supply process includes: a first step S1, by driving the control unit 34, the control motor 30, the non-control motor 32, the control drive unit 14, the non-control drive unit 16, and the seedling box feeder 10 located on the control drive unit 14 start working; the second step S2, seedling boxes are supplied to the control drive unit 14 one after another from the seedling box feeder 10 located on the control drive unit 14, and the first supply sensing sensor 26 senses the supplied seedling boxes and transmits the signal to the controller 34; the third step S3, the first supply sensing sensor 26 senses that the seedling boxes have failed to be supplied to the control drive unit 14 due to a problem with the seedling box feeder 10 located on the control drive unit 14, and transmits the signal to the control unit 34;In the fourth step S4, the operation of the seedling box feeder 10, control motor 30, and control drive unit 14 located above the control drive unit 14 is stopped. Simultaneously, the seedling box feeder 10 located in front of the stopped seedling box feeder 10 is activated to supply seedling boxes to the non-control drive unit 16. The second supply sensing sensor 28 detects the seedling boxes being supplied to the non-control drive unit 16 and transmits the signal to the control unit 34. In the fifth step S5, the control unit 34 receives the signal from the second supply sensing sensor 28 and transmits a reminder or light signal to the operator. This allows the operator to resolve the problem occurring on the seedling box feeder 10 located above the control drive unit 14 and resume supplying seedling boxes to the control drive unit 14. Simultaneously, the operation of the seedling box feeder 10 located in front of the resumed seedling box feeder 10 is stopped.

[0071] First, the seedling box supply process of the seedling box supply conveyor with multiple seedling box suppliers of the present invention includes: a conveyor 24, wherein multiple seedling box suppliers 10 are arranged at intervals along the front and back, and the seedling box suppliers 10 stack multiple seedling boxes on their inner sides and supply seedling boxes one after another sequentially downwards; and a main frame 12 arranged at intervals along both sides and formed in a long front and back direction at the upper part, the main frame 12 being located below the seedling box suppliers 10 and receiving seedling boxes from the seedling box suppliers 10. Between a pair of main frames 12, spaced apart front to back and axially connected to the main frames 12 on both sides, control drive units 14 and non-control drive units 16 are sequentially arranged from back to front for moving the seedling boxes installed on top. Multiple support frames 18 extending towards the ground are spaced apart at the lower part of each main frame 12. At the lower part of each support frame 18, a lifting frame 20 is connected to and can slide up and down on the support frame 18. At the lower part of each lifting frame 20, a threaded connection is provided to allow the lifting frame 20 to move up and down. A height adjustment body 22; a first supply sensing sensor 26 and a second supply sensing sensor 28 are arranged at intervals from rear to front on the main frame 12 of the conveyor 24, and each is respectively installed below the seedling box feeder 10 installed on the upper part of the main frame 12 to sense the seedling boxes supplied to the conveyor 24 through each seedling box feeder 10; a control motor 30 and a non-control motor 32 are connected and installed on the main frame 12 below the control drive unit 14 and the non-control drive unit 16 of the conveyor 24, respectively, for providing rotation to the control drive unit 14 and the non-control drive unit 16 respectively. The control unit 34, which is mounted on the conveyor 24, receives signals from the first supply sensing sensor 26 and the second supply sensing sensor 28. Based on the signals from the first supply sensing sensor 26 and the second supply sensing sensor 28, it controls the operation of the control motor 30, the non-control motor 32, and each seedling box feeder 10. Here, in the seedling box supply process, the control unit 34 is driven to start the operation of the control motor 30, the non-control motor 32, the control drive unit 14, the non-control drive unit 16, and the seedling box feeder 10 located on the control drive unit 14 (step S1).

[0072] Here, the seedling box feeder 10 adopts conventional means, and can selectively adopt one or more of the following methods: pneumatic, hydraulic, mechanical, electronic, or a combination of two or more. As long as the means can supply multiple seedling boxes stacked in the seedling box feeder 10 one after another to the conveyor 24 located at the lower part of the seedling box feeder 10 (described later), then no matter what method or means is used, it is acceptable.

[0073] In the seedling box supply process of the present invention, seedling boxes are supplied one after another from the seedling box supplier 10 located on the upper part of the control drive unit 14, and the supplied seedling boxes are sensed by the first supply sensing sensor 26 and the signal is transmitted to the controller 34 (S2 step).

[0074] At this time, the seedling box feeder 10 located on the upper part of the non-control drive unit 16 stops working, thereby preventing the seedling boxes from being fed in an overlapping manner.

[0075] In the seedling box supply process of the present invention, the first supply sensing sensor 26 detects that the seedling box is not supplied to the control drive unit 14 because the seedling box supplier 10 located on the upper part of the control drive unit 14 has a problem, and transmits the signal to the control unit 34 (S3 step).

[0076] Furthermore, in the seedling box supply process of the present invention, the operation of the seedling box supplier 10 located on the upper part of the control drive unit 14, the control motor 30, and the control drive unit 14 is stopped, and at the same time, the seedling box supplier 10 located in front of the stopped seedling box supplier 10 is driven to supply seedling boxes to the non-control drive unit 16. The second supply sensing sensor 28 senses the seedling box supplied to the non-control drive unit 16 and transmits the signal to the control unit 34 (step S4).

[0077] Here, as Figure 9 , Figure 12 , Figure 13 As shown, the control drive unit 14 and the non-control drive unit 16 provided on the conveyor 24 can be composed of either a roller 44 or a pulley 46. The control drive unit 14 is controlled by the control unit 34. When a problem occurs during the process of the seedling box feeder 10 located above the control drive unit 14 supplying seedling boxes to the conveyor 24, such as the seedling box getting stuck or insufficient seedling box supply, the control motor 30 that provides rotational force to the control drive unit 14 located below the seedling box feeder 10 with the problem is shut off until the problem of the seedling box feeder 10 with the problem is resolved. The non-control drive unit 16 always receives rotational force from the non-control motor 32 and can rotate when any of the multiple seedling box feeders 10 is working.

[0078] And, as Figure 10 As shown, the conveyor 24 can be divided into a controlled conveyor 36 having a control drive unit 14 and a non-controlled conveyor 38 having a non-control drive unit 16. Multiple controlled conveyors 36 with control drive units 14 can be configured and used in sequence after the non-controlled conveyors 38 with non-control drive units 16.

[0079] Moreover, such as Figures 11 to 15As shown, a passive drive unit 40 can also be provided between the control drive unit 14 and the non-control drive unit 16 of the conveyor 24. The passive drive unit 40 is arranged at intervals along the front and rear and is connected to the main frame 12 on both sides. At the same time, it does not receive the rotational force of the control motor 30 and the non-control motor 32. It is used to transfer the seedling box installed on the upper part.

[0080] At this time, the function of the passive drive unit 40 is that when the supply of seedling boxes from the rear to the front is not smooth, the seedling boxes can wait on the passive drive unit 40, thereby preventing problems such as overlap when the seedling box supplier 10 located in front of the problematic seedling box supplier 10 supplies seedling boxes to the conveyor 24. When the problem of the problematic seedling box supplier 10 is resolved and it successfully supplies seedling boxes to the conveyor 24 again, the seedling boxes waiting on the passive drive unit 40 are moved forward by receiving the rotational force of the control drive unit 14 at the rear of the passive drive unit 40.

[0081] Furthermore, the first supply sensing sensor 26 and the second supply sensing sensor 28 respectively sense the seedling boxes supplied from the seedling box feeder 10 located above them to the conveyor 24 and transmit the corresponding signals to the control unit 34 described later. When the first supply sensing sensor 26 senses that the seedling box has not been supplied to the conveyor 24 for more than the time set by the operator, the control unit 34 will control the rotation force of the control motor 30 that provides rotation force to the control drive unit 14 to the off state until the problem of the seedling box feeder 10 with the problem is resolved. During this period, the operation of the seedling box feeder 10 located in front of the seedling box feeder 10 with the problem will be controlled to the on state.

[0082] In the seedling box supply process of the present invention, the control unit 34 receives the signal from the second supply sensing sensor 28 and transmits a reminder or light signal to the operator, thereby enabling the operator to resolve the problem occurring on the seedling box supplier 10 located on the upper part of the control drive unit 14 and resume supplying seedling boxes to the control drive unit 14, while stopping the operation of the seedling box supplier 10 located in front of the seedling box supplier 10 that has resumed supplying (step S5).

[0083] Preferably, a speaker (not shown) and an alarm light are provided on the control unit 34 so that when the first supply sensing sensor 26 and the second supply sensing sensor 28 are received and it is determined that the seedling box is not being supplied to the conveyor normally, a reminder or light signal is transmitted to the operator.

[0084] Furthermore, multiple sensing sensors 42 can be installed on the conveyor 24 to transmit signals to the control unit 34 through sensing the seedling box. Thus, even if the seedling box on the conveyor is not moved normally from the back to the front, the operation of the seedling box feeder 10, the control motor 30 and the non-control motor 32 can be organically switched to the on or off state through the control of the control unit 34.

[0085] Here, the first supply sensing sensor 26, the second supply sensing sensor 28, and the sensing sensor 42 can be selected from proximity sensors, light sensors, ultrasonic sensors, and limit switches. However, any sensor can be used as long as it is a means that can sense the seedling box supplied from the seedling box supplier 10 to the conveyor 24 or can sense the seedling box that is being moved on the conveyor 24 and transmit the signal to the control unit 34.

[0086] According to the seedling box supply process of the seedling box supply conveyor with multiple seedling box feeders of the present invention, seedling boxes are first supplied to the conveyor 24 from the seedling box feeder 10 located at the rearmost of the multiple seedling box feeders 10 provided on the upper part of the conveyor 24. When a problem occurs during the supply of seedling boxes to the conveyor 24 and the control unit 34 receives a signal that a seedling box has failed to be supplied to the conveyor 24, the control unit 34 controls the rotational force of the control motor 30 transmitted to the control drive unit 14 where the problem occurred, so that the control drive unit 14 stops working, and at the same time, drives the seedling box feeder located at the rearmost of the multiple seedling box feeders 10 provided on the upper part of the conveyor 24. The seedling box feeder 10 in front of the feeder 10 sequentially supplies seedling boxes to the conveyor 24. Thus, even when the problem of the seedling box feeder 10 that has a problem is being resolved, the seedling boxes can still be supplied to the conveyor 24 smoothly. Moreover, when the seedling box feeder 10 whose problem has been resolved supplies seedling boxes to the conveyor 24 again, the operation of the seedling box feeder 10 located in front of the seedling box feeder 10 whose problem has been resolved is stopped according to the control of the control unit 34. Thus, the seedling boxes are not repeatedly supplied to the conveyor 24, and the seedling boxes can be smoothly supplied and transferred to the conveyor 24.

[0087] [Third Implementation Form] Seedling Box Supply Device

[0088] The specific details for carrying out the present invention will now be described in more detail with reference to the accompanying drawings.

[0089] Reference Figures 16 to 29The seedling box supply device of the present invention with dual seedling box supply units includes: a conveyor 104 for conveying seedling boxes 102 (not shown); a pair of seedling box supply units 106, which are arranged alternately on the upper part of the conveyor 104 along the front and back, each receiving seedling boxes 102 from the upper part inward and supplying the seedling boxes 102 received on the inner side to the upper part of the conveyor 104, and the seedling boxes 102 supplied to the upper part of the conveyor 104 are moved by the conveyor 104, and the other stops working when one is working; and a control unit 108, which is provided on the conveyor 104 for controlling the operation of the conveyor 104 and the dual seedling box supply units 106 respectively.

[0090] First, the seedling box supply device of the present invention is provided with a conveyor 104, which is used to transfer the seedling box 102.

[0091] Here, the seedling box 102 can be produced using conventional methods, and seedling boxes of various sizes and shapes can be used.

[0092] The conveyor 104 is provided with a pair of upper frames 110 that are spaced apart on both sides and are longer in the front and back direction. Between the pair of upper frames 110, there are a plurality of transfer pulleys 112 that are spaced apart in the front and back direction. The transfer pulleys 112 receive rotational force from the motor 114 that operates based on the control of the control unit 108. The plurality of transfer pulleys 112 can rotate synchronously by placing the belt of the seedling box 102 supplied from the seedling box supply unit 106 on the upper part. Each of the upper frames 110 has an extension frame 118 that is spaced apart in the front and back direction and extends downward. Each extension frame 118 has a height adjustment frame 120 that can slide up and down and covers the extension frame 118. The extension frame 118 and the height adjustment frame 120 are fixed to slide together by a height fixing body 122 composed of bolts and nuts.

[0093] Preferably, a height adjustment groove 124 extending vertically is formed on the height adjustment frame 120, and a plurality of height adjustment stop holes 126 extending along one side and spaced vertically are formed in each height adjustment groove 124, so that the sliding movement is fixed by the height fixing body 122.

[0094] Furthermore, preferably, each of the height adjustment frames 120 is provided with a fine-tuning fixing plate 128 that is spaced from the ground and extends in the direction of mutual viewing along the front and rear. Each fine-tuning fixing plate 128 is provided with a fine-tuning body 130 that is threaded to the fine-tuning fixing plate 128 at the top and extends towards the ground at the bottom, thereby allowing the height of the height adjustment frame 120 to be finely adjusted.

[0095] Additionally, in the opposite direction of the front and rear views of each height adjustment frame 120, wheel trays 132 are provided at intervals from the ground. These trays are relatively long on both sides and fixed to the height adjustment frame 120, while both ends extend in the opposite direction of the height adjustment frame 120. A rotating disk 134 is provided on the extension line of each wheel tray 132, which is hinged at one end and can rotate. Between the rotating disks 134 on both sides, a wheel axle insertion bracket 136 is provided. This bracket is long in a cylindrical shape and is connected and fixed to the rotating disk 134. On both sides of the wheel axle insertion bracket 136, a wheel 138 is provided, spaced apart from the rotating disk 134. The wheel 138 is connected and installed by a wheel axle 140 that passes through the rotating disk 134 and is rotatably inserted into the wheel axle insertion bracket 136. Insertion bracket recess grooves 142 are formed on the upper and lower parts of both sides of the wheel tray 132, which are recessed inward for installing the wheel axle insertion bracket 136.

[0096] At this time, as the operator holds the axle insertion bracket 136 and rotates the rotating disk 134, the seedling box supply device with dual seedling box supply unit of the present invention can be easily moved or fixed in one place. Because of the insertion bracket retraction groove 142, even on irregular ground, the axle insertion bracket 136 can be prevented from disengaging from the insertion bracket retraction groove 142.

[0097] In addition, preferably, a pulley foreign matter removal body 144 is provided on the upper frame 110 of the conveyor 104. One end is fixed to the upper frame 110 and the other end extends into the groove of the transfer pulley 112 in the direction where the belt 116 is not inserted, thereby removing foreign matter from the groove of the transfer pulley 112. This prevents the belt 116 from detaching by removing foreign matter from the transfer pulley 112.

[0098] The seedling box supply device of the present invention includes a pair of seedling box supply units 106. The seedling box supply units 106 are arranged in pairs at intervals along the front and back of the upper part of the conveyor 104. Each of them receives seedling boxes 102 from the upper part to the inner side and supplies the seedling boxes 102 received from the inner side to the upper part of the conveyor 104. The seedling boxes 102 supplied to the upper part of the conveyor 104 are transferred by the conveyor 104. When one of them is working, the other stops working.

[0099] The seedling box supply device of the present invention includes a control unit 108, which is disposed on the conveyor 104 and is used to control the operation of the conveyor 104 and the dual-configured seedling box supply unit 106 respectively.

[0100] Here, the seedling box supply unit 106 is provided with a pair of rear shells 146 that are box-shaped and symmetrically formed on both sides, and are recessed inwards while facing each other. Behind the rear shells 146 is a main shell 148 that is box-shaped and elongated on both sides, with its front sides respectively connected to the rear of each rear shell 146, and its rear inner side recessed inwards. In front of the rear shells 146 are a pair of front shells 150 that are box-shaped and recessed inwards while facing each other, spaced apart from the front of the rear shells 146. In front of the front shells 150 are secondary shells 152 that are box-shaped and elongated on both sides, with their rear sides respectively connected to the front of each front shell 150, and their front inner side recessed inwards. Inside the main shells 148 are spaced apart on both sides, each with its own air... A pair of cylinders 156 are formed by cylinder shafts 154 facing each other in opposite directions. Each cylinder shaft 154 is provided with a cylinder operating handle 158 that is hinged to the upper part of the cylinder shaft 154 and extends downward. On the lower inner side of each cylinder operating handle 158, an operating shaft 160 is respectively connected and fixed to the cylinder operating handle 158 shaft, and extends forward through the main housing 148, rear housing 146, front housing 150, and auxiliary housing 152. On the inner side of the operating shaft 160 of the rear housing 146 and the front housing 150, a seedling box mounting body 162 is respectively provided, which is connected and fixed to the operating shaft 160 shaft, so that the shaft rotates according to the operation of the cylinder 156 and extends in the direction facing each other on both sides, and the seedling box 102 is placed on the upper part of the extension.

[0101] Furthermore, the cylinder 156 is hinged to the cylinder fixing body 164, which is fixed to the upper part of the inner side of the main housing 148 and extends downward to the inner side of the lower part and is hinged to the cylinder 156.

[0102] At this time, a fixed cylinder 166 is provided on the inner side of the rear housing 146 and the front housing 150 respectively. A fixed cylinder shaft 168 is provided on each fixed cylinder 166 to support the outer sides of the seedling box 102 by reciprocating along the direction of mutual facing on both sides.

[0103] Additionally, a butterfly-shaped (not shown) seedling box fixing bolt 170, which is axially connected to the fixed cylinder shaft 168 at one end and extends to both sides of the seedling box 102 at the other end, can be provided on the fixed cylinder shaft 168. Alternatively, a headless bolt 172, which is axially connected to the fixed cylinder shaft 168 at one end, can be provided on the fixed cylinder shaft 168. At the other end of the headless bolt 172, a seedling box fixing body 174, which is connected to the headless bolt 172 at one end and has a groove with a concave-convex shape formed on both sides of the seedling box 102 at the other end, can be provided. However, its shape can have various variations.

[0104] Furthermore, multiple nuts are attached to the headless bolt 172 and the seedling box fixing body 174, which can prevent the headless bolt 172 and the seedling box fixing body 174 from detaching from the fixing cylinder shaft 168, and at the same time, the length can be easily adjusted.

[0105] Here, the seedling box fixing bolts 170 or seedling box fixing bodies 174 are used to facilitate the support of the two outer sides of the seedling box 102. Thus, the two outer sides of a single seedling box 102 with a smaller width or height can be supported by an optimal area that can prevent interference from other stacked seedling boxes 102. When the seedling box 102 is formed with an area smaller than that of the seedling box fixing bolts 170 or seedling box fixing bodies 174, or with a cone shape whose width decreases in the direction of the seedling box 102, the two outer sides of the seedling box 102 will be damaged by strong pressure. The present invention can prevent this problem.

[0106] Between the rear housing 146 and the front housing 150, there are seedling box separators 176 arranged at intervals along the front and rear sides. The seedling box separators 176 are respectively connected and fixed to the operating shaft 160 so that they rotate with the rotation of the operating shaft 160. At the same time, they extend in the direction of mutual viewing on both sides towards the stacked seedling boxes 102, so that they rotate with the rotation of the operating shaft 160 and thus separate the stacked seedling boxes 102.

[0107] At this time, the seedling box separator 176 is provided with a cylindrical operating shaft fixing body 178 that is movably connected and fixed to the operating shaft 160 along the front and rear. An extension plate 180 extending in the opposite direction to the seedling box 102 and bending in a certain direction is provided on the operating shaft fixing body 178. A support platform 182 is provided in front of the extension plate 180, which can be adjusted up and down and left and right on the extension plate 180 by bolts and nuts, while bending and extending towards the seedling box 102 in the front, rear, and lower parts respectively. Support platform extension plates 184 extending upwards are formed at the front and rear of the upper part of the support platform 182. A cylindrical extension plate shaft 186 is connected to the support platform extension plate 184 along the front and rear. A plate-shaped extension plate 186 is provided between the support platform extension plates 184 and faces the stacked seedling boxes 102. A seedling box separation plate 188 extends in the direction between 02 to separate the stacked seedling boxes 102. Separation and holding hinge plates 190 are provided at the front and rear of the seedling box separation plate 188, extending upward and hinged to the extension plate shaft 186, and extending in the opposite direction to the seedling box 102 and placed on the upper part of the support platform 182. Springs 192 are provided at both ends of the seedling box separation plate 188 and the support platform 182 in the opposite direction to the seedling box 102. So when the seedling box separation plate 188 rotates its shaft to separate the stacked seedling boxes 102 and return to the specified angle, even if it is interfered with by the seedling boxes 102 stacked on the upper part of the separated and descending seedling boxes 102, it can be smoothly returned to the specified position.

[0108] At this time, when the seedling box separation plate 188 rotates to separate the seedling box 102, the seedling box separation plate 188 is supported by the separation maintaining hinge plate 190 installed on the support platform 182 and is kept in a fixed position, thereby forcefully separating the stacked seedling boxes 102. The seedling box separation body 176 can be easily adjusted in position, so as to easily separate the seedling boxes 102 of various specifications that are squeezed against each other when stacked.

[0109] Moreover, the seedling box separator 176 can smoothly separate the seedling box 102 stacked at the bottom of the inner side of the seedling box supply unit 106 from the seedling box 102 stacked on top of it and supply them to the conveyor 104, thereby stably supplying the seedling boxes 102 to the conveyor 104 one after another.

[0110] Furthermore, preferably, the portion of each of the seedling box separation plates 188 facing the seedling box 102 is formed in a shape that gradually narrows in width along the front and back.

[0111] On the upper sides of the conveyor 104 and the lower inner side of each front housing 150, there are seedling box transfer guides 194 whose lower parts are connected and fixed. The seedling box transfer guide 194 is plate-shaped and extends upward, while the upper part of the extension extends upward in the opposite direction of the seedling box 102, thereby guiding the outer edge of the seedling box 102 and allowing it to enter along the set path.

[0112] Preferably, a transfer guide extension plate 196 is formed behind each of the seedling box transfer guides 194, extending obliquely in the opposite direction to the seedling box 102, so that the seedling box 102 can be stably transferred on the conveyor 104.

[0113] Each of the rear housing 146 and the front housing 150 has a stacking guide 198 whose lower part is connected and fixed on its upper part. The upper part of each stacking guide 198 is bent at a right angle and extends upward to cover the edge of the seedling box 102, and the upper end of each extends upward at an angle in the opposite direction to the seedling box 102.

[0114] Here, the height of the stacking guide 198 can be freely formed according to the number of seedling boxes 102 stacked, and multiple seedling boxes 102 can be stacked through the stacking guide 198.

[0115] Furthermore, each of the rear housing 146 and the front housing 150 is provided with a plurality of plate-shaped entry guides 1100, the upper part of which is connected to the rear housing 146 and the front housing 150 respectively. The entry guides 1100 are adjacent to the edge of the seedling box 102 that enters the inner side of the seedling box supply unit 106.

[0116] Here, the entry guide 1100 is used to adjust the distance between the rear housing 146 and the edge of the seedling box 102 on the rear housing 146 and the front housing 150, respectively. That is, in order to prevent seedling boxes 102 of various sizes from being stuck on the seedling box fixing bolt 170 or the seedling box fixing body 174 provided on the fixing cylinder 166 and thus unable to move to the lower part, the entry guide 1100 is configured to be adjustable in the distance between the seedling box 102 and the edge.

[0117] Furthermore, on the upper inner side of the rear housing 146 and the front housing 150, shafts can be added to connect the rear housing 146 and the front housing 150 in the direction of mutual viewing between the front and rear, thereby supporting the entry guide rollers 1102 on both sides of the outside of the seedling box 102.

[0118] In addition, the distance between the main shell 148 and the secondary shell 152 is greater than the front-to-back width of the seedling box 102, so that the operator can easily hold the front and back of the seedling box 102.

[0119] A sensor 1104 for sensing the seedling box 102 supplied to the conveyor 104 is provided on the inner or outer side of one or each of the rear housing 146 and the front housing 150. The sensor 1104 may be one or more conventional sensors.

[0120] At this time, the control unit 108 senses the seedling box 102 supplied to the conveyor 104 through the sensor 1104, so that only one of the dual seedling box supply units 106 arranged at intervals is selected to work.

[0121] In addition, the cylinder 156 and the fixed cylinder 166 are selected from pneumatic, hydraulic and electric types. A cylinder pressure release unit 1106 is connected to the seedling box supply unit 106. The cylinder pressure release unit 1106 is connected to the cylinder 156 and the fixed cylinder 166 respectively, so as to discharge, recover or cut off the air pressure, hydraulic pressure and electricity supplied to the cylinder 156 and the fixed cylinder 166, thereby easily releasing the seedling box 102 clamped on the seedling box supply unit 106.

[0122] Furthermore, preferably, mounting adjustment holes 1108 for adjusting the position of the seedling box mounting body 162 are formed through each of the rear housing 146 and the front housing 150.

[0123] Each of the upper frames 110 has an entry prevention body 1110 arranged at intervals along the front and rear sides, with its upper part connected and fixed to the lower part of the upper frame 110 and extending downward. An entry prevention body 1110 is provided with a square tube-shaped lifting frame (not shown) in the opposite direction of the front and rear views, with its upper part fixed to the lower part of the upper frame 110.

[0124] At this time, the function of the entry prevention body 1110 and the lifting frame is that when the seedling box supply device with dual seedling box supply unit of the present invention is moved by a forklift, not only can the center of gravity of the seedling box supply device with dual seedling box supply unit of the present invention be easily grasped, but also the forklift forks can be prevented from damaging the seedling box supply device with dual seedling box supply unit of the present invention.

[0125] In addition, the control unit 108 is provided with a plurality of operation buttons 1114 and switches 1116 for simultaneously or individually turning on or off the conveyor 104 and the seedling box supply unit 106. It is also provided with a moving speed regulator 1118 arranged at intervals from the operation buttons 1114 for adjusting the conveying speed of the seedling box 102 of the conveyor 104, and a conversion speed regulator 1120 for setting the waiting time of the waiting seedling box supply unit 106 that is working in place of the seedling box supply unit 106 that has a problem.

[0126] In addition, the control unit 108 controls the other seedling box supply unit 106 to stop working when one of the pair of seedling box supply units 106 is working. The time for the other seedling box supply unit 106 to work in place of the seedling box supply unit 106 that is waiting due to a problem is set to within 1 to 3 seconds, but it can be freely adjusted according to the working environment.

[0127] Furthermore, preferably, a speaker 1122 (not shown) or an alarm light 1124 is provided on the control unit 108 to inform the operator when a problem occurs with the seedling box supply unit 106 in operation and another seedling box supply unit 106 is waiting to replace the problematic seedling box supply unit 106.

[0128] According to the present invention, a seedling box supply device with dual seedling box supply units is provided on a conveyor 104 for transferring seedling boxes 102, with dual seedling box supply units 106 spaced apart from each other along the front and rear sides. When one of the dual seedling box supply units 106 is working, the other stops working. Furthermore, when one seedling box supply unit 106 malfunctions and is unable to supply seedling boxes 102 to the conveyor 104, the other seedling box supply unit 106 takes over. The seedling box supply unit 106 temporarily and automatically alternates its operation to supply the seedling boxes 102 to the conveyor 104. This ensures that the seedling boxes 102 are smoothly supplied to the conveyor 104, regardless of the short or long time that the operator needs to repair or inspect the seedling box supply unit 106 that has malfunctioned. After the seedling box supply unit 106 that has malfunctioned has completed its repair or inspection, the repaired or inspected seedling box supply unit 106 supplies the seedling boxes 102 to the conveyor 104 again, so that the seedling boxes 102 can be smoothly and continuously supplied to the conveyor 104.

[0129] [Explanation of Labels in the Attached Image]

[0130] 10: Seedling box feeder; 12: Main frame

[0131] 14: Control drive unit; 16: Non-control drive unit

[0132] 18: Support frame 20: Lifting frame

[0133] 22: Height Adjuster 24: Conveyor

[0134] 26: First supply sensing sensor; 28: Second supply sensing sensor

[0135] 30: Controlled motor; 32: Non-controlled motor

[0136] 34: Control Unit 36: Control Conveyor

[0137] 38: Non-controlled conveyor; 40: Passive drive unit

[0138] 42: Sensing sensor 44: Roller

[0139] 46: Pulley

[0140] 104: Conveyor; 106: Seedling box supply unit

[0141] 108: Control Unit; 110: Upper Frame

[0142] 112: Transfer pulley; 114: Motor

[0143] 116: Belt; 118: Extension Frame

[0144] 120: Height adjustment frame; 122: Height fixing body

[0145] 124: Height adjustment slot; 126: Height adjustment stop hole

[0146] 128: Fine-tuning fixing plate; 130: Fine-tuning body

[0147] 132: Wheel tray 134: Rotary disc

[0148] 136: Axle insert bracket 138: Wheel

[0149] 140: Axle; 142: Insertion bracket retractor groove

[0150] 144: Belt pulley foreign object removal device; 146: Rear housing

[0151] 148: Main housing; 150: Front housing

[0152] 152: Sub-housing housing; 154: Cylinder shaft

[0153] 156: Cylinder; 158: Cylinder operating handle

[0154] 160: Operating shaft; 162: Seedling box mounting body

[0155] 164: Cylinder mounting body; 166: Fixed cylinder

[0156] 168: Fixed cylinder shaft; 170: Seedling box fixing bolts

[0157] 172: Headless bolt; 174: Seedling box fixing body

[0158] 176: Seedling box separator; 178: Operating shaft fixing body

[0159] 180: Extension plate; 182: Support platform

[0160] 184: Support platform extension plate; 186: Extension plate shaft

[0161] 188: Seedling box separation plate; 190: Separation and maintenance hinge plate

[0162] 192: Spring; 194: Seedling box transfer guide.

[0163] 196: Transfer guide extension plate; 198: Stacking guide.

[0164] 1100: Entering the bootloader 1102: Entering the bootloader

[0165] 1104: Sensor; 1106: Cylinder pressure release unit

[0166] 1108: Mounting body adjustment hole; 1110: Entry prevention body

[0167] 1114: Operation button 1116: Switch

[0168] 1118: Movement Speed ​​Adjuster 1120: Conversion Speed ​​Adjuster

Claims

1. A seedling box feeding conveyor having a plurality of seedling box feeders, a plurality of seedling box feeders (10) being arranged at an upper portion in a front-rear direction at intervals from each other, the seedling box feeders (10) each stacking a plurality of seedling boxes at an inner side and sequentially feeding the seedling boxes one by one to a lower portion, the seedling box feeding conveyor comprising: a conveyor having a plurality of seedling box feeders (10) mounted at an upper portion at intervals in a front-rear direction, having main frames (12) arranged at intervals in a front-rear direction at both sides of the upper portion and being longer in the front-rear direction, having control drive portions (14) and non-control drive portions (16) arranged in order from a rear portion to a front portion at intervals in the front-rear direction between the pair of main frames (12) while being axially coupled to the main frames (12) at both sides thereof for transferring the seedling boxes mounted at the upper portion, having a plurality of support frames (18) arranged at intervals in the front-rear direction at lower portions of the main frames (12) for extending to a ground surface, having lift frames (20) coupled to the support frames (18) at lower portions of the support frames (18) for being vertically moved on the support frames (18), and having height adjustment bodies (22) threadedly coupled to lower portions of the lift frames (20) for vertically moving the lift frames (20); first and second feeding sensing sensors (26, 28) arranged at intervals in the front-rear direction at the main frames (12) of the conveyor and each arranged at a lower portion of the seedling box feeder (10) mounted at an upper portion of the main frame (12) for sensing the seedling boxes fed to the conveyor by each seedling box feeder (10); control and non-control motors (30, 32) coupled to the main frames (12) at lower portions of the control and non-control drive portions (14, 16) of the conveyor for respectively providing a rotational force to the control and non-control drive portions (14, 16); a control portion provided at the conveyor for receiving signals of the first and second feeding sensing sensors (26, 28) and controlling operations of the control and non-control motors (30, 32) and each seedling box feeder (10) based on the signals of the first and second feeding sensing sensors (26, 28); wherein the conveyor is divided into a control conveyor (36) having the control drive portions (14) and a non-control conveyor (38) having the non-control drive portions (16) to constitute, the control conveyor (36) having the control drive portions (14) is provided in a plurality and sequentially coupled to a rear portion of the non-control conveyor (38) having the non-control drive portions (16), a passive drive portion (40) is provided between the control and non-control drive portions (14, 16) of the conveyor, the passive drive portion (40) is arranged at intervals in the front-rear direction and axially coupled to the main frames (12) at both sides thereof while not receiving the rotational force of the control and non-control motors (30, 32) for transferring the seedling boxes mounted at the upper portion, and the passive drive portion (40) is provided in a plurality and sequentially coupled to the rear portion of the control conveyor (36) having the control drive portions (14). ​ ​ ​ ​ ​ ​ ​ A plurality of sensing sensors (42) are provided on the conveyor to transmit signals to the control unit by sensing the seedling boxes.

2. A seedling pot supplying process of a seedling pot supplying conveyor having a plurality of seedling pot feeders, wherein The seedling box supply conveyor with a plurality of seedling box feeders includes a conveyor with a plurality of seedling box feeders (10) arranged at intervals in the front-rear direction, each of which stacks a plurality of seedling boxes on the inner side and sequentially feeds the seedling boxes one by one to the lower part, and a main frame (12) arranged at intervals in the two sides and formed longer in the front-rear direction on the upper part, which is located below the seedling box feeder (10) and receives the seedling boxes from the seedling box feeder (10), a control drive unit (14) and a non-control drive unit (16) arranged at intervals in the front-rear direction between the pair of main frames (12) and sequentially arranged from the rear to the front while being respectively shaft-connected to the main frames (12) on the two sides for moving the seedling boxes installed on the upper part, a plurality of support frames (18) arranged at intervals in the front-rear direction on the lower part of the main frames (12), a lifting frame (20) connected to the support frame (18) on the lower part of the support frame (18) and capable of moving up and down on the support frame (18), and a height adjustment body (22) threadedly combined with the lower part of the lifting frame (20) to move the lifting frame (20) up and down on the lower part of the lifting frame (20), a first supply sensing sensor (26) and a second supply sensing sensor (28) arranged at intervals in the front-rear direction on the main frame (12) of the conveyor and respectively arranged on the lower part of the seedling box feeder (10) installed on the upper part of the main frame (12) to sense the seedling boxes supplied to the conveyor by each seedling box feeder (10), a control motor (30) and a non-control motor (32) connected to the main frame (12) on the lower part of the control drive unit (14) and the non-control drive unit (16) of the conveyor to respectively provide rotational force to the control drive unit (14) and the non-control drive unit (16), and a control unit arranged on the conveyor to receive signals from the first supply sensing sensor (26) and the second supply sensing sensor (28) and control the operation of the control motor (30), the non-control motor (32), and each seedling box feeder (10) according to the signals from the first supply sensing sensor (26) and the second supply sensing sensor (28), The seedling box supply process includes: In a first step S1, the control motor (30), the non-control motor (32), the control drive unit (14), the non-control drive unit (16), and the seedling box feeder (10) located on the upper part of the control drive unit (14) are started by driving the control unit; In a second step S2, the seedling boxes are sequentially fed one by one from the seedling box feeder (10) located on the upper part of the control drive unit (14) to the control drive unit (14), and the supplied seedling boxes are sensed by the first supply sensing sensor (26) and signals are transmitted to the control unit. In the third step S3, the first supply sensing sensor (26) senses that the seedling box supply unit (10) positioned on the upper portion of the control driving unit (14) has a problem and that the seedling box is not supplied to the control driving unit (14), and transmits a signal to the control unit. In the fourth step S4, the operation of the seedling box supply unit (10) positioned on the upper portion of the control driving unit (14), the control motor (30), and the control driving unit (14) is stopped, and the seedling box supply unit (10) positioned in front of the seedling box supply unit (10) that has stopped the operation is driven to supply the seedling box to the non-control driving unit (16), and the second supply sensing sensor (28) senses the seedling box supplied to the non-control driving unit (16) and transmits a signal to the control unit. In the fifth step S5, the control unit receives the signal of the second supply sensing sensor (28) and transmits a warning or a light signal to the operator, so that the operator solves the problem of the seedling box supply unit (10) positioned on the upper portion of the control driving unit (14), and resumes the supply of the seedling box to the control driving unit (14), and stops the operation of the seedling box supply unit (10) positioned in front of the seedling box supply unit (10) that has resumed the supply operation. The conveyor is divided into the control conveyor (36) having the control driving unit (14) and the non-control conveyor (38) having the non-control driving unit (16), The control conveyor (36) having the control driving unit (14) is provided in plurality and sequentially combined behind the non-control conveyor (38) having the non-control driving unit (16), A passive driving unit (40) is provided between the control driving unit (14) and the non-control driving unit (16) of the conveyor, and is arranged to be spaced apart in the front and rear directions and axially connected to the main frame (12) on both sides while not receiving the rotational force of the control motor (30) and the non-control motor (32), and is used to move the seedling box installed on the upper portion, A plurality of sensing sensors (42) are provided on the conveyor, which transmit a signal to the control unit by sensing the seedling box.

3. A seedling box supply device having a double seedling box supply unit, comprising: a conveyor for moving a seedling box (102); a pair of seedling box supply units (106) double provided in the front and rear directions and spaced apart from each other on the upper portion of the conveyor, each receiving the seedling box (102) from the inside of the upper portion and supplying the seedling box (102) received on the inside to the upper portion of the conveyor, and the seedling box (102) supplied to the upper portion of the conveyor is moved by the conveyor, and each is in operation while the other is stopped; a control unit provided on the conveyor for controlling the operation of the conveyor and the double provided seedling box supply units (106); and a pair of seedling box supply units (106) double provided in the front and rear directions and spaced apart from each other on the upper portion of the conveyor, each receiving the seedling box (102) from the inside of the upper portion and supplying the seedling box (102) received on the inside to the upper portion of the conveyor, and the seedling box (102) supplied to the upper portion of the conveyor is moved by the conveyor, and each is in operation while the other is stopped; a control unit provided on the conveyor for controlling the operation of the conveyor and the double provided seedling box supply units (106); and The seedling box supply unit (106) is provided with a pair of rear housings (146) which are box-shaped, symmetrical along the two sides, and recessed inward along the direction of mutual viewing, a main housing (148) which is box-shaped along the two longer sides, and recessed inward along the inner side of the rear and front, and connected to the rear of each rear housing (146) at the front of the rear housing (146), a pair of front housings (150) which are box-shaped, symmetrical along the direction of mutual viewing, and recessed inward along the inner side of the front and rear, and arranged at intervals along the front of each rear housing (146), a sub-housing (152) which is box-shaped along the two longer sides, and recessed inward along the inner side of the front and rear, and connected to the front of each front housing (150) at the rear of the front housing (150), a pair of air cylinders (156) which are arranged at intervals along the two sides, and formed along the opposite direction of mutual viewing with the respective cylinder shafts (154) facing each other, an air cylinder operating handle (158) which is arranged on each cylinder shaft (154) and extends downward from the upper part which is hingedly connected to the cylinder shaft (154), an operating shaft (160) which is fixedly connected to the air cylinder operating handle (158) at the shaft and extends forward through the main housing (148), the rear housing (146), the front housing (150), and the sub-housing (152), and arranged at the inner side of each operating shaft (160) of the rear housing (146) and the front housing (150), and an air cylinder mounting body (162) which extends along the direction of mutual viewing along the two sides and accommodates the lower part of the seedling box (102) on the extended upper part, and is fixedly connected to the operating shaft (160) at the shaft and rotates along the direction of mutual viewing along the two sides according to the operation of the air cylinder (156).

4. The plug flat feeding device having a double plug flat feeding unit according to claim 3, wherein The conveyor is provided with a pair of upper frames (110) which are arranged at intervals along the two sides and are longer along the front and rear, a plurality of transfer pulleys (112) which are arranged at intervals along the front and rear between the pair of upper frames (110), a motor (114) which receives a rotating force from the transfer pulleys (112) and operates based on the control of the control unit, a belt which is arranged on the upper part of the seedling box (102) supplied from the seedling box supply unit (106), and the plurality of transfer pulleys (112) which are synchronously rotated by the belt, an extension frame (118) which is arranged at the lower part of each upper frame (110) and extends downward along the front and rear, a height adjustment frame (120) which is slidably moved up and down and covers the extension frame (118) and is arranged on each extension frame (118), and a height fixing body (122) which is composed of a bolt and a nut and fixes the sliding movement of the extension frame (118) and the height adjustment frame (120) relative to each other.

5. The plug flat feeding device having a double plug flat feeding unit according to claim 4, wherein The height adjustment frame (120) is provided with a height adjustment slot (124) which is longer and extends along the upper and lower directions, and a plurality of height adjustment stop holes (126) which are arranged at intervals along the upper and lower directions and extend along one side and are formed on each height adjustment slot (124).

6. The plug flat feeding device having a double plug flat feeding unit according to claim 4, wherein A fine adjustment fixing disc (128) is provided in a direction in which the height adjustment frames (120) face each other in the front and rear direction, and is spaced apart from the ground and extends in the direction in which the height adjustment frames (120) face each other. An upper portion of a fine adjustment body (130) is combined with the fine adjustment fixing disc (128) by a screw thread, and a lower portion extends toward the ground.

7. The seedling box supply apparatus having a double seedling box supply unit according to claim 4, wherein In a direction opposite to the direction in which the height adjustment frames (120) face each other in the front and rear direction, a wheel tray (132) is provided which is spaced apart from the ground, is longer in a direction in which both sides face each other, and is fixed to the height adjustment frames (120) so that both ends of the wheel tray (132) extend in the direction opposite to the direction in which the height adjustment frames (120) face each other. A rotation disc (134) is provided which is hingedly connected to one end of the wheel tray (132) so that the rotation disc (134) can rotate on an axis. A wheel shaft insertion rack (136) is provided which is longer in a cylindrical shape in a direction in which both sides face each other, is fixed to the rotation disc (134), and is inserted into the wheel shaft (140) which is rotatably inserted into the wheel shaft insertion rack (136) through the rotation disc (134). A wheel (138) is provided which is spaced apart from the rotation disc (134) on both sides of the wheel shaft insertion rack (136), and is connected and mounted to the wheel shaft (140) which is rotatably inserted into the wheel shaft insertion rack (136) through the rotation disc (134).

8. The seedling box supply device with a double seedling box supply unit according to claim 7, wherein Insertion rack recessed grooves (142) are formed on both sides of the wheel tray (132) so that the wheel shaft insertion rack (136) is recessed inward on both sides of the wheel tray (132).

9. The seedling box supply device with a double seedling box supply unit according to claim 4, wherein A belt pulley foreign matter removing body (144) is provided on the upper frame (110) of the conveyor, and is fixed to the upper frame (110) at one end and extends into a groove of the transfer pulley (112) in a direction in which the belt (116) is not fitted into the groove of the transfer pulley (112), and is used to remove foreign matter in the groove of the transfer pulley (112).

10. The seedling box supply device with a double seedling box supply unit according to claim 3, wherein The air cylinder (156) is hingedly connected to a cylinder fixing body (164) which is fixed to the inside of the main housing (148) at an upper portion and extends downward at a lower portion, and is hingedly connected to the cylinder fixing body (164).

11. The seedling box supply device with a double seedling box supply unit according to Claim 3, wherein A fixing cylinder (166) is provided on the inside of each of the rear housing (146) and the front housing (150), and a fixing cylinder shaft (168) is provided on the fixing cylinder (166) so that the fixing cylinder shaft (168) reciprocates in a direction in which both sides face each other, and supports the outside of both sides of the seedling box (102).

12. The plug flat feeding device having a double plug flat feeding unit according to claim 11, wherein A butterfly bolt-shaped seedling box fixing bolt (170) is provided on the fixing cylinder shaft (168), and one end of the seedling box fixing bolt (170) is combined with the fixing cylinder shaft (168) in an axial direction, and the other end of the seedling box fixing bolt (170) extends in a direction in which both sides of the seedling box (102) face each other.

13. The plug flat feeding device having a double plug flat feeding unit according to claim 11, wherein A stud bolt (172) is provided on the fixing cylinder shaft (168), and one end of the stud bolt (172) is combined with the fixing cylinder shaft (168) in an axial direction. A seedling box fixing body (174) is provided on the other end of the stud bolt (172), and one end of the seedling box fixing body (174) is combined with the stud bolt (172), and a concave-convex groove is formed in a concave-convex shape in a direction in which both sides of the seedling box (102) face each other.

14. The plug flat feeding device having a double plug flat feeding unit according to claim 3, wherein Between the rear housing (146) and the front housing (150), seedling box separating bodies (176) are arranged at intervals in the front-rear direction and are fixed to the operation shafts (160) so as to rotate with the operation shafts (160) and extend in the direction between the stacked seedling boxes (102) so as to separate the stacked seedling boxes (102) from each other.

15. The plug flat feeding device having a double plug flat feeding unit according to claim 14, wherein The seedling box separating bodies (176) are each provided with an operation shaft fixing body (178) in the form of a cylinder that is movably fixed to the operation shaft (160) in the front-rear direction, an extension plate (180) that extends in the opposite direction of the seedling box (102) and is bent in a certain direction, a support table (182) that is adjusted up and down and left and right on the extension plate (180) by a bolt and a nut while being bent in the front-rear direction and the lower portion in the direction of the seedling box (102), a support table extension plate (184) that is formed in the upper portion of the front-rear direction of the support table (182) and extends upward, an extension plate shaft (186) that is provided in the form of a cylinder in the front-rear direction of the support table extension plate (184), a seedling box separating plate (188) that is provided in the form of a plate and extends in the direction between the stacked seedling boxes (102) so as to separate the stacked seedling boxes (102) from each other, a separation maintaining hinge plate (190) that extends upward and is hingedly connected to the extension plate shaft (186) while extending in the opposite direction of the seedling box (102) so as to be disposed on the upper portion of the support table (182), and springs (192) that are provided in the opposite direction of the seedling box (102) on the lower portion of the seedling box separating plate (188) and the support table (182) and have both ends connected so as to return the stacked seedling boxes (102) to a specified angle when the seedling box separating plate (188) is rotated and separates the stacked seedling boxes (102) and then returns to the specified angle, and even when the stacked seedling boxes (102) are interfered by the seedling boxes (102) that are separated and lowered, the stacked seedling boxes (102) can be smoothly returned to the specified position.

16. The plug flat feeding device having a double plug flat feeding unit according to claim 15, wherein The seedling box separating plate (188) is formed so as to gradually narrow in the front-rear direction toward the seedling box (102).

17. The plug flat feeding device having a double plug flat feeding unit according to claim 3, wherein Lower portion fixed seedling box transfer guides (194) are provided on the upper portions of both sides of the conveyor and the inner sides of the front housings (150) and are fixed, the seedling box transfer guides (194) are in the form of a plate and extend upward while the upper portion that extends is inclined upward in the opposite direction of the seedling box (102) so as to guide the outer edge of the seedling box (102) and cause it to enter along a specified path.

18. The plug flat feeding device having a double plug flat feeding unit according to claim 17, wherein Transfer guide extension plates (196) that are inclined in the opposite direction of the seedling box (102) are formed in the rear of each seedling box transfer guide (194).

19. The plug flat feeding device having a double plug flat feeding unit according to claim 3, wherein In the upper portions of each of the rear housing (146) and the front housing (150), a lower portion of a stacking guide (198) is connected and fixed, the upper portion of the stacking guide (198) is bent at a right angle and extends upward to cover the edge of the seedling box (102), and the upper end portion thereof extends upward obliquely in the opposite direction of the seedling box (102).

20. The plug flat feeding device having a double plug flat feeding unit according to claim 3, wherein In each of the rear housing (146) and the front housing (150), a plurality of entry guides (1100) in the form of a plate are provided, the upper portions of the entry guides (1100) are connected and fixed to the rear housing (146) and the front housing (150), respectively, and the entry guides (1100) are adjacent to the edge of the seedling box (102) entering the inside of the seedling box supply unit (106).

21. The plug flat feeding device having a double plug flat feeding unit according to claim 3, wherein The interval between the main housing (148) and the sub housing (152) is greater than the width of the seedling box (102) in the front-rear direction.

22. The plug flat feeding device having a double plug flat feeding unit according to claim 3, wherein In the upper portions of the inside of each of the rear housing (146) and the front housing (150), entry guide rollers (1102) are provided, the entry guide rollers (1102) are connected to the rear housing (146) and the front housing (150) in the front-rear direction, and the entry guide rollers (1102) support the outer sides of the seedling box (102).

23. The plug flat feeding device having a double plug flat feeding unit according to claim 3, wherein In one or each of the inside or the outside of the rear housing (146) and the front housing (150), a sensor (1104) for sensing the seedling box (102) supplied to the conveyor is provided.

24. The plug flat feeding device having a double plug flat feeding unit according to claim 3, wherein The air cylinder (156) and the fixed air cylinder (166) are selected from among air pressure type, oil pressure type, and electric type.

25. The plug flat feeding device having a double plug flat feeding unit according to claim 24, wherein The air cylinder pressure release unit (1106) is connected to the seedling box supply unit (106), the air cylinder pressure release unit (1106) is connected to the air cylinder (156) and the fixed air cylinder (166), respectively, and the air cylinder pressure release unit (1106) releases, recovers, or cuts off the air pressure, the oil pressure, or the electricity supplied to the air cylinder (156) and the fixed air cylinder (166), thereby easily releasing the seedling box (102) clamped on the seedling box supply unit (106).

26. The plug flat feeding device having a double plug flat feeding unit according to claim 3, wherein In each of the rear housing (146) and the front housing (150), an installation body adjustment hole (1108) for adjusting the position of the seedling box installation body (162) is formed.

27. The plug flat feeding device having a double plug flat feeding unit according to claim 4, wherein In the lower portion of each of the upper frames (110), an entry prevention body (1110) is provided, the entry prevention body (1110) is arranged in the front-rear direction, the upper portion of the entry prevention body (1110) is connected and fixed to the upper frame (110), and the lower portion of the entry prevention body (1110) extends downward.

28. The plug flat feeding device having a double plug flat feeding unit according to claim 27, wherein In the opposite direction of the front-rear direction of the entry prevention body (1110), a lifting frame in the form of a square tube is provided, the upper portion of the lifting frame is fixed to the lower portion of the upper frame (110).

29. The plug flat feeding device having a double plug flat feeding unit according to claim 4, wherein The control portion controls one of the pair of seedling box supply units (106) to work and controls the other to stop working, and sets the time for the working seedling box supply unit (106) to be replaced by the other seedling box supply unit (106) waiting for a problem to occur in the working seedling box supply unit (106) to be within 1 to 3 seconds.

30. The plug flat feeding device having a double plug flat feeding unit according to claim 29, wherein On the control section, a plurality of operation buttons (1114) and switches (1116) for simultaneously or individually turning on or off the conveyer and the seedling box supply units (106) are provided, and a movement speed adjusting body (1118) for adjusting the movement speed of the seedling boxes (102) of the conveyer and a switching speed adjusting body (1120) for setting the waiting time of the seedling box supply unit (106) in standby in place of the seedling box supply unit (106) that has developed a problem and is working are also provided.

31. The plug flat feeding device having a double plug flat feeding unit according to claim 29, wherein A speaker (1122) or an alarm lamp (1124) is provided on the control section to inform the operator when the seedling box supply unit (106) in standby takes the place of the seedling box supply unit (106) that has developed a problem and is working.

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