Seedling tray supply device with dual seedling tray supply means

Abstract

The present invention relates to a conveyor for supplying seedling boxes having a number of seedling box feeders, the number of which are provided at the top at a distance from each other in the front and rear directions, and a number of seedling boxes are stacked inside the conveyor, and the conveyor has a number of seedling box feeders at the bottom for sequentially supplying the seedling boxes one by one. The conveyor has a number of seedling box feeders mounted at the top at a distance from each other in the front and rear directions, a main frame is provided at the top at a distance from each other on both sides and formed long in the front and rear directions, and a pair of main frames are provided between the pair of main frames at a distance from each other in the front and rear directions, both sides are connected to the main frames, and the seedling boxes mounted at the top are transported. A controlled drive unit and an uncontrolled drive unit are provided sequentially from the rear to the front, and a number of support frames are provided at a distance from each other at the bottom of each main frame and extended to the ground, and the bottom of each support frame is connected to the support frame and is slidable up and down on the support frame. a conveyor having a height adjuster at the bottom of each lifting frame, the height adjuster being screwed to the bottom of the lifting frame to move the lifting frame up and down; first and second supply detection sensors spaced apart from each other from rear to front on the main frame of the conveyor, each of which is provided at the bottom of a seedling box supplying device seated on the top of the main frame, for detecting each seedling box supplied to the conveyor through each seedling box supplying device; controlled and uncontrolled motors connected to the lower main frames of the controlled and uncontrolled driving parts of the conveyor, respectively, for providing rotational force to the controlled and uncontrolled driving parts; and a control unit provided on the conveyor, receiving signals from the first and second supply detection sensors and controlling the operation of the controlled and uncontrolled motors according to the signals from the first and second supply detection sensors.

Description

[Technical Field]

[0001] The present invention relates to a seedling box supply conveyor equipped with a plurality of seedling box supplying machines, and more particularly, to a seedling box supply conveyor equipped with a plurality of seedling box supplying machines spaced apart from one another on a conveyor that transports and supplies seedling boxes, and seedling boxes are sequentially supplied onto the conveyor from the rearmost seedling box supplying machine among the plurality of seedling box supplying machines. If a problem occurs in a rearmost seedling box supplying machine and seedling boxes cannot be smoothly supplied onto the conveyor, seedling boxes are supplied onto the conveyor from the seedling box supplying machine located in front of the problematic seedling box supplying machine, so that seedling boxes can be smoothly supplied onto the conveyor while the problem in the problematic seedling box supplying machine is resolved. When seedling boxes are further supplied onto the conveyor from the problem-resolved seedling box supplying machine, the seedling box supplying machine located in front of the problem-resolved seedling box supplying machine stops operating, so that seedling boxes can be smoothly supplied onto the conveyor.

[0002] The present invention also relates to a seedling box supplying process of a seedling box supplying conveyor having a plurality of seedling box supplying machines, and more particularly to a seedling box supplying process of a seedling box supplying conveyor having a plurality of seedling box supplying machines that can smoothly continue to supply and transport seedling boxes to the conveyor even when a problem occurs in one of the plurality of seedling box supplying machines by using a conveyor divided into a controlled drive unit and an uncontrolled drive unit.

[0003] The present invention also relates to a seedling box supplying device having dual seedling box supplying means, and in particular, dual seedling box supplying means for supplying seedling boxes onto a conveyor for transporting seedling boxes are provided spaced apart from each other in the front and rear, and the dual seedling box supplying means are configured so that when one of the dual seedling box supplying means is operated, the operation of the other one is stopped, and when a problem occurs in one of the seedling box supplying means that has supplied seedling boxes to the conveyor and the seedling boxes cannot be supplied to the conveyor, the other one of the dual seedling box supplying means stops operating. The present invention relates to a seedling box supplying device having a double seedling box supplying means, which automatically crosses the raising box supplying means momentarily instead of the raising box supplying means and supplies the raising boxes to the conveyor, so that the raising boxes can be supplied to the conveyor without any hindrance even while an operator is repairing or inspecting the raising box supplying means in which a problem has occurred, and after the repair or inspection of the raising box supplying means in which a problem has occurred is completed, the raising boxes are further supplied to the conveyor through the repaired or inspected raising box supplying means, so that the raising boxes can be supplied smoothly and continuously to the conveyor. [Background technology]

[0004] Generally, a seeder is used to plant rice seeds, which are used in rice cultivation, as well as other paddy crops such as onions and leeks, in order to easily and accurately sow seeds and apply additional fertilizer to the prepared furrows.

[0005] The seed drill is configured to load a seedling tray and provide soil and seeds into the seedling tray.

[0006] At this time, the seed drill must be able to continuously supply seedling trays, but because the work is done one by one, the operator manually supplies the trays one by one from the supply side.

[0007] However, this method requires one worker to always be present at the seedling tray supply location, which is not suitable for the labor shortage in rural areas.

[0008] Therefore, in order to solve the above problems, seedling tray supplying devices disclosed in Korean Patent Registration No. 10-1831111, Korean Patent Registration No. 10-1817039, Korean Patent Registration No. 10-1974329, Korean Patent Registration No. 10-2242222, Korean Patent Registration No. 10-2347573, and Korean Patent Registration No. 10-1886218 have been developed and used.

[0009] However, in the above-mentioned method, the seedling box supplying device is configured as a single device on the conveyor, and a large number of seedling boxes of various shapes and sizes are not reliably supplied one by one to the conveyor from the seedling box supplying device. If the seedling box supplying device breaks down due to reasons such as a seedling box being pinched on the seedling box supplying device, the pinched seedling boxes must be removed or re-aligned and supplied onto the seedling box supplying device. During the time it takes to repair the seedling box supplying device, the seedling boxes cannot be reliably supplied onto the conveyor, resulting in problems such as a poor automatic seedling box supplying rate and poor workability.

[0010] In addition, in the above-mentioned system, the seedling box supplying means is configured as a single unit on the conveyor, and if a problem occurs with the seedling box supplying means, such as a seedling box being caught on the seedling box supplying means or an operator not being able to supply a seedling box to the seedling box supplying means in a timely manner, the caught seedling box must be removed from the seedling box supplying means or a seedling box must be supplied onto the seedling box supplying means. During the time it takes to repair or inspect the seedling box supplying means, seedling boxes cannot be reliably supplied onto the conveyor, which frequently causes problems such as a poor automatic supply rate of seedling boxes and poor workability.

[0011] Therefore, there is a need for a seedling tray supply conveyor that can be equipped with a large number of seedling tray supply devices and that solves the above-mentioned conventional problems.

[0012] Furthermore, there is a demand for a seedling box supplying process using a seedling box supplying conveyor having a number of seedling box supplying devices that solves the above-mentioned conventional problems.

[0013] In addition, there is a demand for a seedling tray supplying device that is provided with dual seedling tray supplying means, which solves the above-mentioned conventional problems. [Prior art documents] [Patent documents]

[0014] [Patent Document 1] Korean Patent Registration No. 10-1831111 [Patent Document 2] Korean Patent Registration No. 10-1817039 [Patent Document 3] Korean Patent Registration No. 10-1974329 [Patent Document 4] Korean Patent Registration No. 10-2242222 [Patent Document 5] Korean Patent Registration No. 10-2347573 [Patent Document 6] Korean Patent Registration No. 10-1886218 Summary of the Invention [Problem to be solved by the invention]

[0015] The present invention has been invented to solve the above-mentioned problems of the prior art. Conventionally, a single seedling box supplying machine is installed on a conveyor, and multiple seedling boxes of various shapes and sizes are not properly supplied one by one to the conveyor. If the seedling box supplying machine breaks down due to reasons such as a seedling box being caught on the seedling box supplying machine, the seedling boxes cannot be properly supplied to the conveyor during the time it takes to repair the seedling box supplying machine by removing the caught seedling boxes or aligning them and supplying them to the seedling box supplying machine, which reduces the automatic supply rate of seedling boxes and workability. In this invention, multiple seedling box supplying machines are installed at intervals on a conveyor that transfers and supplies seedling boxes, and a seedling box supplying machine is installed at the rear of the multiple seedling box supplying machines. To provide a seedling box supply conveyor provided with a number of seedling box supply devices, which allows seedling boxes to be supplied sequentially from seedling box supply devices onto the conveyor, and when a problem occurs in a rear seedling box supply device and seedling boxes cannot be smoothly supplied to the conveyor, the seedling box supply device located in front of the problematic seedling box supply device supplies seedling boxes to the conveyor, so that seedling boxes can be smoothly supplied continuously onto the conveyor while the problem in the problematic seedling box supply device is being solved, and when seedling boxes are further supplied onto the conveyor from the problem-solved seedling box supply device, the seedling box supply device located in front of the problem-solved seedling box supply device stops operation, so that seedling boxes can be smoothly and continuously supplied onto the conveyor.

[0016] In addition, the present invention has been invented to solve the above-mentioned problems of the prior art. Conventionally, a single seedling box supplying machine is constructed on a conveyor, and a large number of seedling boxes having various shapes and sizes are not reliably supplied one by one to the conveyor on the seedling box supplying machine. In addition, if the seedling box supplying machine breaks down due to a seedling box being caught on the seedling box supplying machine, the seedling boxes cannot be reliably supplied to the conveyor during the time it takes to repair the seedling box supplying machine by removing the caught seedling box or aligning it and supplying it on the seedling box supplying machine, resulting in a decrease in the automatic supply rate of the seedling boxes and workability. In contrast, in the present invention, a large number of seedling box supplying machines are spaced apart from each other on a conveyor that transfers and supplies the seedling boxes, and a seedling box supplying machine is installed at the rear of the large number of seedling box supplying machines. To provide a seedling box supplying process for a seedling box supplying conveyor having a number of seedling box supplying machines, in which seedling boxes are supplied onto the conveyor in order from one to another, and when a problem occurs in a seedling box supplying machine located behind and the seedling boxes cannot be smoothly supplied onto the conveyor, the seedling box supplying machine located in front of the problematic seedling box supplying machine supplies the seedling boxes onto the conveyor, so that the seedling boxes can be smoothly supplied onto the conveyor while the problem in the problematic seedling box supplying machine is being solved, and when the problem-solved seedling box supplying machine further supplies seedling boxes onto the conveyor, the seedling box supplying machine located in front of the problem-solved seedling box supplying machine stops operating, so that the seedling boxes can be smoothly supplied and transferred onto the conveyor.

[0017] In addition, the present invention has been invented to solve the problems of the prior art as described above. Conventionally, a single seedling box supplying means is provided on a conveyor, and if a problem occurs in the seedling box supplying means because a seedling box is caught on the seedling box supplying means or an operator is unable to supply a seedling box to the seedling box supplying means in a timely manner, the caught seedling box must be removed from the seedling box supplying means or a seedling box must be supplied onto the seedling box supplying means. During the time it takes to repair or inspect the seedling box supplying means, the seedling boxes cannot be reliably supplied onto the conveyor, which results in a poor automatic supply rate of seedling boxes and poor workability. In this invention, a double seedling box supplying means is provided on the conveyor that transports the seedling boxes, spaced apart from each other at the front and rear, and one of the double seedling box supplying means is operated. To provide a seedling box supplying device having dual seedling box supplying means, in which when one of the seedling box supplying means that has supplied seedling boxes to the conveyor is stopped, the other seedling box supplying means is automatically operated crosswise for a moment to supply seedling boxes to the conveyor in place of the seedling box supplying means in which the problem has occurred, so that seedling boxes can be supplied to the conveyor without hindrance even during a short or long time while an operator repairs or inspects the seedling box supplying means in which the problem has occurred, and after the repair or inspection of the seedling box supplying means in which the problem has occurred is completed, seedling boxes are further supplied to the conveyor through the seedling box supplying means that has been repaired or inspected, so that seedling boxes can be supplied smoothly and continuously onto the conveyor. [Means for solving the problem]

[0018] In order to achieve the above object, the present invention provides a seedling box supply conveyor having a plurality of seedling box supplying devices, the plurality of seedling box supplying devices being provided at an upper portion spaced apart from each other in the front and rear directions, each having a plurality of seedling box stacked inside, and a lower portion having a seedling box supplying device for sequentially supplying the seedling boxes one by one, the plurality of seedling box supplying devices being mounted at an upper portion spaced apart from each other in the front and rear directions, the upper portion being provided with main frames spaced apart from each other on both sides and elongated in the front and rear directions, the pair of main frames being spaced apart from each other in the front and rear directions and each having both sides pivotally connected to the main frames, and being provided to transport the seedling boxes mounted at the upper portion, and a controlled drive unit and an uncontrolled drive unit being provided sequentially from rear to front, the lower portion of each main frame being provided with a plurality of support frames spaced apart from each other and extending to the ground, the lower portion of each support frame being provided with a lifting frame connected to the support frame and being slidable up and down on the support frame, the lifting frame a conveyor having height adjusters at the bottom of each frame that are screw-connected to the bottom of the lifting frame to move the lifting frame up and down; first and second supply detection sensors that are respectively mounted on the main frame of the conveyor at a distance from rear to front, each mounted below a seedling box supplying device seated on the top of the main frame, and that detect each seedling box supplied to the conveyor by each seedling box supplying device; controlled and uncontrolled motors that are connected to the lower main frames of the controlled and uncontrolled driving units of the conveyor and provide rotational force to the controlled and uncontrolled driving units, respectively; and a control unit that is mounted on the conveyor, receives signals from the first and second supply detection sensors, and controls the operation of the controlled and uncontrolled motors according to the signals from the first and second supply detection sensors.

[0019] In order to achieve the above object, the present invention provides a seedling raising box supplying machine, which is provided at the bottom with a plurality of seedling raising boxes spaced apart from one another in the front and rear directions, each having a plurality of seedling raising boxes stacked inside, and which sequentially supplies the seedling boxes one by one; and a pair of main frames, which are provided at the bottom of the seedling raising box supplying machine and receive the seedling boxes from the seedling raising box supplying machine, and which are provided at the top with main frames spaced apart from one another and elongated in the front and rear directions, and which are spaced apart from one another in the front and rear directions and are connected to the main frames on both sides, respectively, to transfer the seedling boxes seated on the top. The conveyor is provided with a controlled drive unit and an uncontrolled drive unit sequentially provided from rear to front, a plurality of support frames spaced apart from each other and extending to the ground at the bottom of each main frame, a lifting frame connected to the bottom of each support frame and slidable up and down on the support frame, and a height adjuster screwed to the bottom of each lifting frame to move the lifting frame up and down; first and second supply detection sensors spaced apart from each other on the main frame of the conveyor, each installed below a seedling tray supplying device seated on the top of the main frame, for detecting each seedling tray supplied to the conveyor through each seedling tray supplying device; a controlled motor and an uncontrolled motor connected to the main frame below the controlled drive unit and the uncontrolled drive unit of the conveyor, for providing rotational force to the controlled drive unit and the uncontrolled drive unit, respectively; and a signal from the first and second supply detection sensors installed on the conveyor. and a control unit configured to control the operation of the controlled motor, the uncontrolled motor, the controlled drive unit, the uncontrolled drive unit, and the seedling box feeder located above the controlled drive unit by operating the control unit. A seedling box supplying process of a seedling box supplying conveyor having a plurality of seedling box feeders each including a first step of operating the control unit to operate the controlled motor, the uncontrolled motor, the controlled drive unit, the uncontrolled drive unit, and the seedling box feeder located above the controlled drive unit; anda second step of detecting the seedling tray to be supplied through a first supply detection sensor and transmitting a signal to the control unit; a third step of detecting that a problem has occurred in the seedling tray supply device located above the control drive device and that the seedling tray is not being supplied to the control drive device through the first supply detection sensor and transmitting a signal to the control unit; a third step of stopping the operation of the seedling tray supply device, the control motor, and the control drive device located above the control drive device and operating the seedling tray supply device located in front of the stopped seedling tray supply device to supply the seedling tray to the non-controlled drive device; A seedling box supplying process for a seedling box supplying conveyor having a number of seedling box supply devices is provided, which comprises: a fourth step of detecting a seedling box supplied to an uncontrolled driving unit through a sensor and transmitting a signal to a control unit; and a fifth step of transmitting an alarm or light signal to an operator in response to a signal from a second supply detection sensor in the control unit, allowing the operator to solve a problem occurring in the seedling box supply device located above the controlled driving unit and supply more seedling boxes to the controlled driving unit, and stopping the operation of the seedling box supply device located in front of the seedling box supply device whose supply has been resumed.

[0020] In order to achieve the above-mentioned object, the present invention provides a seedling box supplying device having dual seedling box supplying means, comprising: a conveyor for transporting seedling boxes; a pair of seedling box supplying means provided above the conveyor at a distance from each other in the front and rear directions, each of which supplies seedling boxes from the top to the inside and supplies the seedling boxes supplied to the inside to the top of the conveyor so that the seedling boxes supplied to the top of the conveyor are transported via the conveyor, and each of which is provided so that when one of the means is operated, the other is stopped; and a control unit provided above the conveyor for controlling the operation of the conveyor and the dual seedling box supplying means. [Effects of the Invention]

[0021] In the seedling box supply conveyor equipped with a plurality of seedling box supply devices according to the present invention, seedling boxes are first supplied to the conveyor from the rearmost seedling box supply device among the plurality of seedling box supply devices installed above the conveyor. When a problem occurs while a seedling box is being supplied to the conveyor and the control unit receives a signal indicating that no seedling boxes are being supplied to the conveyor, the control unit controls the rotational force of the control motor supplied to the control drive device where the problem occurred to stop the control drive device, and operates the seedling box supply device located in front of the seedling box supply device where the problem occurred to supply seedling boxes sequentially onto the conveyor. This has the advantage that seedling boxes can be supplied smoothly to the conveyor while the problem with the seedling box supply device where the problem occurred is resolved. Furthermore, when more seedling boxes are supplied to the conveyor through the seedling box supply device whose problem has been resolved, the operation of the seedling box supply device located in front of the seedling box supply device whose problem has been resolved is stopped by control of the control unit, so that the seedling boxes are not supplied overlapping on the conveyor and are smoothly supplied and transported to the conveyor.

[0022] In addition, in the seedling box supplying process of the seedling box supplying conveyor having a plurality of seedling box supplyers according to the present invention, seedling boxes are first supplied to the conveyor by the rearmost seedling box supplyer among the plurality of seedling box supplyers installed above the conveyor. When a problem occurs while a seedling box is being supplied to the conveyor and the control unit receives a signal indicating that no seedling boxes are being supplied to the conveyor, the control unit controls the rotational force of the control motor supplied to the control drive unit where the problem occurred to stop the control drive unit, and operates the seedling box supplyer located in front of the seedling box supplyer where the problem occurred to supply seedling boxes sequentially onto the conveyor. This has the advantage that seedling boxes can be supplied to the conveyor smoothly while the problem with the seedling box supplyer where the problem occurred is resolved. Furthermore, when more seedling boxes are supplied to the conveyor through the seedling box supplyer whose problem has been resolved, the operation of the seedling box supplyer located in front of the seedling box supplyer whose problem has been resolved is stopped by the control of the control unit, so that the seedling boxes are not supplied overlapping on the conveyor and are smoothly supplied and transported onto the conveyor.

[0023] In addition, the seedling box supplying device according to the present invention has dual seedling box supplying means, which are provided in dual positions spaced apart from each other at the front and rear, for supplying seedling boxes onto a conveyor that transports the seedling boxes. The dual seedling box supplying means are configured so that when one is operated, the other is stopped from operating. If a problem occurs in one of the seedling box supplying means that has supplied seedling boxes to the conveyor and the seedling boxes cannot be supplied to the conveyor, the other seedling box supplying means automatically operates crosswise for a moment to replace the failed seedling box supplying means and supply the seedling boxes to the conveyor. This allows seedling boxes to be supplied to the conveyor without hindrance, regardless of whether it is a short or long time while an operator repairs or inspects the failed seedling box supplying means. After the repair or inspection of the failed seedling box supplying means is completed, seedling boxes are supplied to the conveyor through the repaired or inspected seedling box supplying means, resulting in a smooth and continuous supply of seedling boxes onto the conveyor. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a schematic perspective view of a seedling tray supply conveyor equipped with a plurality of seedling tray supply devices according to the present invention; [Figure 2] 1 is a schematic front view of a seedling tray supply conveyor equipped with a number of seedling tray supply devices according to the present invention; [Figure 3] 1 is a schematic front view of a seedling tray supply conveyor equipped with a number of seedling tray supply devices according to the present invention; [Figure 4] 1 is a schematic perspective view of a seedling tray supply conveyor equipped with a plurality of seedling tray supply devices according to the present invention; [Figure 5] 1 is a schematic perspective view of a seedling tray supply conveyor equipped with a plurality of seedling tray supply devices according to the present invention; [Figure 6] 1 is a schematic front view of a seedling tray supply conveyor equipped with a number of seedling tray supply devices according to the present invention; [Figure 7] 1 is a schematic front view of a seedling tray supply conveyor equipped with a number of seedling tray supply devices according to the present invention; [Figure 8] 1 is a schematic diagram of a seedling box supply process of a seedling box supply conveyor having a number of seedling box supply devices according to the present invention. FIG. [Figure 9] 1 is a schematic perspective view of a seedling box supplying process of a seedling box supplying conveyor having a number of seedling box supplying machines according to the present invention. FIG. [Figure 10] 1 is a schematic front view of a seedling tray supply conveyor equipped with a number of seedling tray supply devices according to the present invention; [Figure 11] 1 is a schematic front view of a seedling tray supply conveyor equipped with a number of seedling tray supply devices according to the present invention; [Figure 12] 1 is a schematic perspective view of a seedling tray supply conveyor equipped with a plurality of seedling tray supply devices according to the present invention; [Figure 13] 1 is a schematic perspective view of a seedling tray supply conveyor equipped with a plurality of seedling tray supply devices according to the present invention; [Figure 14] 1 is a schematic front view of a seedling tray supply conveyor equipped with a number of seedling tray supply devices according to the present invention; [Figure 15] 1 is a schematic front view of a seedling tray supply conveyor equipped with a number of seedling tray supply devices according to the present invention; [Figure 16] 1 is a perspective view of a seedling tray supplying device provided with dual seedling tray supplying means according to the present invention. [Figure 17] 1 is a photograph showing a side view of a seedling tray supplying device provided with double seedling tray supplying means according to the present invention. [Figure 18] 1 is a photograph showing a seedling tray supplying device provided with double seedling tray supplying means according to the present invention, viewed from the front. [Figure 19] 1 is an enlarged photograph of a portion of a seedling tray supplying device according to the present invention, which is provided with two seedling tray supplying means. [Figure 20] 1 is an enlarged photograph of a portion of a seedling tray supplying device according to the present invention, which is provided with two seedling tray supplying means. [Figure 21] 1 is an enlarged photograph of a portion of a seedling tray supplying device according to the present invention, which is provided with two seedling tray supplying means. [Figure 22]1 is an enlarged photograph of a portion of a seedling tray supplying device according to the present invention, which is provided with two seedling tray supplying means. [Figure 23] 1 is an enlarged photograph of a portion of a seedling tray supplying device according to the present invention, which is provided with two seedling tray supplying means. [Figure 24] 1 is an enlarged photograph of a portion of a seedling tray supplying device according to the present invention, which is provided with two seedling tray supplying means. [Figure 25] 1 is an enlarged photograph of a portion of a seedling tray supplying device according to the present invention, which is provided with two seedling tray supplying means. [Figure 26] 1 is an enlarged photograph of a portion of a seedling tray supplying device according to the present invention, which is provided with two seedling tray supplying means. [Figure 27] 1 is an enlarged photograph of a portion of a seedling tray supplying device according to the present invention, which is provided with two seedling tray supplying means. [Figure 28] 1 is an enlarged photograph of a portion of a seedling tray supplying device according to the present invention, which is provided with two seedling tray supplying means. [Figure 29] 1 is a photograph showing a rear view of a seedling tray supplying device provided with dual seedling tray supplying means according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] [First embodiment] Seedling tray supply conveyor DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific implementations of the present invention will be described in more detail with reference to the accompanying drawings.

[0026] 1 to 7, the seedling box supply conveyor equipped with a plurality of seedling box supply devices according to the present invention is a seedling box supply conveyor equipped with a plurality of seedling box supply devices, which are provided at the top at intervals in the front and rear directions, and each of which has a plurality of seedling boxes stacked inside, and a seedling box supply device 10 at the bottom for sequentially supplying the seedling boxes one by one, in which a plurality of seedling box supply devices 10 are mounted at the top at intervals in the front and rear directions, and a main frame 12 is provided at the top at intervals in the front and rear directions and is elongated in the front and rear directions, Between the pair of frames 12, there are provided a controlled drive unit 14 and an uncontrolled drive unit 16, which are spaced apart from each other in the front and rear, and are connected to the main frame 12 on both sides and are provided to transport the seedling trays placed on the top. A plurality of support frames 18 are provided at the bottom of each main frame 12, spaced apart from each other and extending to the ground. A lifting frame 20 is provided at the bottom of each support frame 18, connected to the support frame 18, and is provided to be able to slide up and down on the support frame 18. The lower part of each lifting frame 20 is provided with a conveyor 24 having a height adjuster 22 which is screwed to the lower part of the lifting frame 20 to move the lifting frame 20 up and down; a first supply detection sensor 26 and a second supply detection sensor 28 which are respectively provided on the main frame 12 of the conveyor 24 at a distance from each other from rear to front, and which are respectively provided on the lower part of the seedling tray supplying device 10 seated on the upper part of the main frame 12, and which detect each seedling tray supplied to the conveyor 24 through each seedling tray supplying device 10; The control unit 34 comprises a controlled motor 30 and an uncontrolled motor 32 which are connected to the lower main frame 12 of the controlled drive unit 14 and the uncontrolled drive unit 16, respectively, and which provide rotational force to the controlled drive unit 14 and the uncontrolled drive unit 16, and a control unit 34 which is provided on the conveyor 24, receives signals from the first supply detection sensor 26 and the second supply detection sensor 28, and controls the operation of the controlled motor 30, the uncontrolled motor 32 and each seedling tray supplying machine 10 according to the signals from the first supply detection sensor 26 and the second supply detection sensor 28.

[0027] First, in a seedling box supply conveyor having a number of seedling box supplying devices, a number of which are provided at the top at a distance from each other in the front and rear directions, and a number of seedling boxes stacked inside, and a number of seedling box supplying devices 10 at the bottom for sequentially supplying the seedling boxes one by one, a number of seedling box supplying devices 10 are mounted at the top at a distance from each other in the front and rear directions, and main frames 12 are provided at the top at a distance from each other on both sides and are elongated in the front and rear directions, and between a pair of main frames 12, both sides are pivotally connected to the main frames 12 at a distance from each other in the front and rear directions, and the seedling boxes mounted at the top are transported. The main frame 12 is provided with a controlled drive unit 14 and a non-controlled drive unit 16 arranged in order from rear to front, and a plurality of support frames 18 extending to the ground are provided at the bottom of each main frame 12 at intervals from one another, and a lifting frame 20 is provided at the bottom of each support frame 18, connected to the support frame 18 and slidable up and down on the support frame 18, and a conveyor 24 having a height adjuster 22 screwed to the bottom of the lifting frame 20 to move the lifting frame 20 up and down is provided at the bottom of each lifting frame 20.

[0028] In this case, the seedling tray supplying machine 10 is a conventional one, and any one or more of pneumatic, hydraulic, mechanical, electronic or a combination of two or more of these can be selectively used. Any type and means can be used as long as it can sequentially supply the multiple seedling trays stacked on the seedling tray supplying machine 10 one by one to the conveyor 24 described below, which is provided below the seedling tray supplying machine 10.

[0029] Meanwhile, the controlled drive unit 14 and the uncontrolled drive unit 16 formed on the conveyor 24 can be formed of either rollers 44 or pulleys 46 as shown in Figures 1, 4 and 5. The controlled drive unit 14 supplies seedling boxes to the conveyor 24 from the seedling box supply devices 10 located above the controlled drive unit 14 under the control of the control unit 34 described below. If a problem such as a seedling box getting stuck or a shortage of seedling boxes occurs, the first supply detection sensor 26 transmits a signal to this, and the control motor 30, which provides rotational force to the controlled drive unit 14 located below the seedling box supply device 10 where the problem occurred, turns off only until the problem with the seedling box supply device 10 where the problem occurred is resolved. The uncontrolled drive unit 16 is always rotated by the rotational force transmitted from the uncontrolled motor 32 whenever any one of the multiple seedling box supply devices 10 is operated.

[0030] In addition, the conveyor 24 may be divided into a controlled conveyor 36 having a controlled driving unit 14 and an uncontrolled conveyor 38 having an uncontrolled driving unit 16, as shown in FIG. 2. A plurality of controlled conveyors 36 having controlled driving units 14 may be provided and connected in sequence behind the uncontrolled conveyors 38 having uncontrolled driving units 16.

[0031] Meanwhile, between the controlled driving unit 14 and the uncontrolled driving unit 16 of the conveyor 24, as shown in Figures 3 and 4, a driven driving unit 40, which is spaced apart from each other in the front and rear directions and is connected to the main frame 12 on both sides by a shaft, can be provided and used to transport the seedling trays placed on top, and which does not receive the rotational force of the controlled motor 30 and the uncontrolled motor 32.

[0032] In this case, the driven drive unit 40 is formed to prevent problems such as overlapping when seedling boxes are supplied onto the conveyor 24 from the seedling box supply machine 10 located in front of the seedling box supply machine 10 that has the problem, as the seedling boxes wait on the driven drive unit 40 when the supply of seedling boxes from the rear to the front is not smooth.When the problem with the seedling box supply machine 10 is resolved and more seedling boxes are supplied smoothly onto the conveyor 24, the seedling boxes waiting on the driven drive unit 40 are transferred the rotational force of the control drive unit 14 behind the driven drive unit 40 and are transported forward by the seedling boxes being transported forward.

[0033] The first and second supply sensors 26 and 28 are provided on the main frame 12 of the conveyor 24 at a distance from each other from rear to front, and are respectively provided below the seedling tray supply devices 10 mounted on the upper part of the main frame 12, and detect each seedling tray supplied to the conveyor 24 through each seedling tray supply device 10.

[0034] At this time, the first supply detection sensor 26 and the second supply detection sensor 28 respectively detect the seedling boxes being supplied to the conveyor 24 from the seedling box supply device 10 located above them and transmit the information to the control unit 34 described below. When the first supply detection sensor 26 detects that no seedling boxes are being supplied to the conveyor 24 for a period of time set by the operator, the control unit 34 controls the rotational force of the control motor 30, which provides rotational force to the control drive unit 14, to be turned off only until the problem with the seedling box supply device 10 where the problem occurred is resolved, and during that time, the control unit 34 controls the operation of the seedling box supply device 10 located in front of the seedling box supply device 10 where the problem occurred to be turned on.

[0035] A controlled motor 30 and an uncontrolled motor 32 are provided on the lower main frame 12 of the conveyor 24 and connected to the controlled drive section 14 and the uncontrolled drive section 16, respectively, to provide rotational force to the controlled drive section 14 and the uncontrolled drive section 16, respectively.

[0036] In addition, a control unit 34 is provided on the conveyor 24, receives signals from the first supply detection sensor 26 and the second supply detection sensor 28, and controls the operation of the controlled motor 30, the uncontrolled motor 32 and each seedling tray supplying device 10 according to the signals from the first supply detection sensor 26 and the second supply detection sensor 28.

[0037] In this case, it is preferable that the control unit 34 is provided with a speaker and a warning light (not shown) that receive signals from the first supply detection sensor 26 and the second supply detection sensor 28 and transmit an alarm or light signal to the operator when the seedling tray is not being fed normally onto the conveyor.

[0038] In addition, a number of detection sensors 42 may be installed on the conveyor 24 to detect the seedling trays and transmit signals to the control unit 34. As a result, even if the seedling trays being transported on the conveyor are not normally transported from rear to front, the operation of the seedling tray supply machine 10, the controlled motor 30 and the uncontrolled motor 32 can be smoothly switched on and off by the control of the control unit 34.

[0039] Meanwhile, the first supply detection sensor 26, the second supply detection sensor 28 and the detection sensor 42 are equipped with any one selected from a proximity sensor, an optical sensor, an ultrasonic sensor and a limit switch, but any sensor may be used as long as it can detect a seedling box being supplied onto the conveyor 24 from the seedling box supply machine 10 or a seedling box being transported on the conveyor 24 and transmit a signal to the control unit 34.

[0040] Meanwhile, the seedling tray supply conveyor having a plurality of seedling tray supply devices formed as above is operated as follows.

[0041] First, under the control of the control unit 34, the controlled motor 30, the uncontrolled motor 32 and the seedling tray supplying device 10 located above the control driving unit 14 are operated, thereby transporting the seedling trays one by one from the rear to the front.

[0042] At this time, if the seedling trays are not being supplied smoothly to the controlled drive unit 14 due to a seedling tray being stuck in the seedling tray supply unit 10 located above the controlled drive unit 14 or an insufficient number of seedling trays, this is detected by the first supply detection sensor 26 and the operation of the seedling tray supply unit 10 located above the controlled drive unit 14 and the controlled drive unit 14 is turned off, and the seedling tray supply unit 10 located above the non-controlled drive unit 16 is turned on to supply the seedling trays to the non-controlled drive unit 16. At this time, the control unit 34 transmits an alarm or light signal to an operator, so that the operator who receives the alarm or light signal can understand the cause of the problem and solve it. Once the problem is solved and the seedling trays are normally supplied to the controlled drive unit 14 from the seedling tray supply unit 10 located above the controlled drive unit 14, the operation of the seedling tray supply unit 10 located above the non-controlled drive unit 16 is turned off under the control of the control unit 34.

[0043] In the seedling box supply conveyor provided with a plurality of seedling box supply devices according to the present invention, seedling boxes are first supplied to the conveyor 24 from the rearmost seedling box supply device 10 among the plurality of seedling box supply devices 10 provided on the top of the conveyor 24, and when a problem occurs while the seedling boxes are being supplied to the conveyor 24 and the control unit 34 transmits a signal indicating that the seedling boxes are not being supplied to the conveyor 24, the control unit 34 controls the rotational force of the control motor 30 supplied to the control drive unit 14 where the problem occurs to stop the control drive unit 14, and the control unit 34 transmits a signal indicating that the seedling boxes are not being supplied to the conveyor 24. By operating the seedling box supplying machine 10 installed in front of the problem-solved seedling box supplying machine 10 and supplying the seedling boxes sequentially onto the conveyor 24, the seedling boxes can be smoothly supplied to the conveyor 24 while the problem with the problem-solved seedling box supplying machine 10 is being resolved.In addition, when further seedling boxes are supplied to the conveyor 24 through the problem-solved seedling box supplying machine 10, the operation of the seedling box supplying machine 10 located in front of the problem-solved seedling box supplying machine 10 is stopped by control of the control unit 34, so the seedling boxes are not supplied overlapping on the conveyor 24, and the seedling boxes can be smoothly supplied and transported to the conveyor 24.

[0044] [Second embodiment] Seedling tray supply process DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific implementations of the present invention will be described in more detail with reference to the accompanying drawings.

[0045] 8 to 15, the seedling box supplying process of the seedling box supplying conveyor having a number of seedling box supplying machines according to the present invention comprises a number of seedling boxes provided at intervals from each other in the front and rear, each having a number of seedling boxes stacked inside, a seedling box supplying machine 10 at the bottom for sequentially supplying the seedling boxes one by one, and a main frame 12 provided at the bottom of the seedling box supplying machine 10 to which the seedling boxes are supplied from the seedling box supplying machine 10, and which is spaced apart from each other on both sides and formed long in the front and rear directions, and between the pair of main frames 12, there are two main frames 12 spaced apart from each other in the front and rear directions, and one on each side. The main frame 12 is connected to the shaft on the main frame 12 and is provided with a controlled drive unit 14 and an uncontrolled drive unit 16 provided in order from rear to front to transport the seedling trays placed on the top. A plurality of support frames 18 are provided at the bottom of each main frame 12, spaced apart from each other and extending to the ground. A lifting frame 20 is provided at the bottom of each support frame 18, connected to the support frame 18 and capable of sliding up and down on the support frame 18. The bottom of each lifting frame 20 is connected to the bottom of the lifting frame 20 with a screw. a conveyor 24 having a height adjuster 22 for vertical movement of the lifting frame 20, a first supply detection sensor 26 and a second supply detection sensor 28 each installed on the main frame 12 of the conveyor 24 at a distance from rear to front, each installed under the seedling tray supplying device 10 seated on the upper part of the main frame 12, for detecting each seedling tray supplied to the conveyor 24 through each seedling tray supplying device 10, and a control drive unit 14 and a non-control drive unit 16 of the conveyor 24 each installed on the lower main frame 12 and connected to the control drive unit In a seedling tray supplying process of a seedling tray supplying conveyor having a number of seedling tray supplying devices, the seedling tray supplying conveyor is composed of a controlled motor 30 and an uncontrolled motor 32 which provide rotational force to the control motor 30 and the ...A first step S1 of operating the uncontrolled motor 32, the controlled drive unit 14, the uncontrolled drive unit 16, and the seedling tray supplying device 10 located above the controlled drive unit 14; a second step S2 of supplying seedling trays one by one from the seedling tray supplying device 10 located above the controlled drive unit 14 to the controlled drive unit 14, detecting the supplied seedling trays through the first supply detection sensor 26 and transmitting a signal to the control unit 34; a third step S3 of detecting through the first supply detection sensor 26 that a problem has occurred in the seedling tray supplying device 10 located above the controlled drive unit 14 and that the seedling trays are not being supplied to the controlled drive unit 14, and transmitting a signal to the control unit 34; The fourth step S4 is to stop the operation of the control drive unit 14 and operate the seedling tray supply machine 10 located in front of the stopped seedling tray supply machine 10 to supply seedling trays to the non-controlled drive unit 16, and detect the seedling trays supplied to the non-controlled drive unit 16 through the second supply detection sensor 28 and transmit a signal to the control unit 34. The control unit 34 receives the signal from the second supply detection sensor 28 and transmits an alarm or light signal to the operator, who then solves the problem occurring on the seedling tray supply machine 10 located above the control drive unit 14 and supplies more seedling trays to the control drive unit 14, and the operation of the seedling tray supply machine 10 located in front of the seedling tray supply machine 10 whose supply has been resumed is stopped in a fifth step S5.

[0046] First, a number of raising boxes are provided at intervals in the front and rear directions, and a number of raising boxes are stacked inside each of them. At the bottom, there is a raising box supplying machine 10 that supplies the raising boxes one by one. At the bottom of the raising box supplying machine 10, there are main frames 12 that are provided at the bottom and are supplied with the raising boxes from the raising box supplying machine 10, and are provided at the top, spaced apart on both sides and formed long in the front and rear directions. Between the pair of main frames 12, there are spaced apart from each other in the front and rear directions, and both sides are connected to the main frames 12 by axles, and are provided to transport the raising boxes seated at the top. The conveyor 2 is provided with a controlled driving unit 14 and a non-controlled driving unit 16, which are sequentially provided from the front to the rear, and a plurality of support frames 18 are provided at the bottom of each main frame 12, spaced apart from one another and extending to the ground. The bottom of each support frame 18 is provided with a lifting frame 20, which is connected to the support frame 18 and is slidable up and down on the support frame 18. The bottom of each lifting frame 20 is provided with a height adjusting device 22, which is screw-connected to the bottom of the lifting frame 20 and allows the lifting frame 20 to move up and down. 4, a first supply detection sensor 26 and a second supply detection sensor 28 are respectively provided on the lower part of the seedling tray supplying device 10 seated on the upper part of the main frame 12 and detect the seedling trays supplied to the conveyor 24 through the seedling tray supplying device 10, and are respectively connected to the lower main frame 12 of the controlled driving unit 14 and the uncontrolled driving unit 16 of the conveyor 24 and provide rotational force to the controlled driving unit 14 and the uncontrolled driving unit 16. In a seedling tray supplying process of a seedling tray supplying conveyor having a number of seedling tray supplying devices, the seedling tray supplying conveyor is composed of a controlled motor 30, an uncontrolled motor 32, and a control unit 34 provided on the conveyor 24 to receive signals from a first supply detecting sensor 26 and a second supply detecting sensor 28 and to control the operation of the controlled motor 30, the uncontrolled motor 32 and each seedling tray supplying device 10 according to the signals from the first supply detecting sensor 26 and the second supply detecting sensor 28, and the control unit 34 is operated to control the operation of the controlled motor 30, the uncontrolled motor 32, the controlled driving unit 14,The seedling tray supplying device 10 located above the uncontrolled driving unit 16 and the controlled driving unit 14 is operated (Step S1).

[0047] In this case, the seedling tray supplying machine 10 is a conventional one, and any one or more of pneumatic, hydraulic, mechanical, electronic or a combination of two or more of these can be selectively used, and any type and means can be used as long as it can sequentially supply the multiple seedling trays stacked on the seedling tray supplying machine 10 one by one to the conveyor 24 described below provided below the seedling tray supplying machine 10.

[0048] The seedling tray supplying device 10 located above the control driving unit 14 supplies the seedling trays one by one to the control driving unit 14, and the supplied seedling trays are detected by the first supply detecting sensor 26, and a signal is transmitted to the control unit 34 (Step S2).

[0049] At this time, the operation of the seedling tray supplying device 10 located above the uncontrolled driving unit 16 is stopped, thereby preventing the seedling trays from being fed in a pile.

[0050] When a problem occurs in the seedling tray supplying device 10 located above the control driving unit 14 and seedling trays are not being supplied to the control driving unit 14, the first supply detecting sensor 26 detects this and transmits a signal to the control unit 34 (Step S3).

[0051] In addition, the operation of the seedling tray supplying device 10, the control motor 30, and the control driving device 14 located above the control driving device 14 is stopped, and the seedling tray supplying device 10 located in front of the stopped seedling tray supplying device 10 is operated to supply seedling trays to the non-controlled driving device 16, and the seedling trays supplied to the non-controlled driving device 16 are detected through the second supply detection sensor 28, and a signal is transmitted to the control device 34 (Step S4).

[0052] 9, 12 and 13, the controlled driving unit 14 and the uncontrolled driving unit 16 formed on the conveyor 24 can be formed of either rollers 44 or pulleys 46. The controlled driving unit 14 supplies seedling boxes from the seedling box supply devices 10 located above the controlled driving unit 14 to the conveyor 24 under the control of the control unit 34. If a problem such as a seedling box getting stuck or a shortage of seedling boxes occurs, the first supply detection sensor 26 transmits a signal to the controlled driving unit 14. The controlled motor 30, which provides rotational force to the controlled driving unit 14 located below the seedling box supply device 10 where the problem occurred, stops operating until the problem with the seedling box supply device 10 where the problem occurred is resolved. The uncontrolled driving unit 16 is always rotated by the rotational force transmitted from the uncontrolled motor 32 whenever any one of the seedling box supply devices 10 is operated.

[0053] Also, the conveyor 24 may be divided into a controlled conveyor 36 having a controlled driving unit 14 and an uncontrolled conveyor 38 having an uncontrolled driving unit 16 as shown in FIG. 10, and a plurality of controlled conveyors 36 having controlled driving units 14 may be provided and connected in sequence behind the uncontrolled conveyors 38 having uncontrolled driving units 16.

[0054] Meanwhile, between the controlled driving unit 14 and the uncontrolled driving unit 16 of the conveyor 24, as shown in Figures 11 to 15, a driven driving unit 40, which is spaced apart from each other in the front and rear directions and is axially connected to the main frame 12 on both sides, can be provided and used to transport the seedling trays placed on top, and which does not receive the rotational force of the controlled motor 30 and the uncontrolled motor 32.

[0055] In this case, the driven drive unit 40 is configured to prevent problems such as overlapping when seedling boxes are supplied onto the conveyor 24 from the seedling box supply machine 10 located in front of the problematic seedling box supply machine 10, as the seedling boxes wait on the driven drive unit 40 when the supply of seedling boxes from the rear to the front is not smooth.When the problem with the problematic seedling box supply machine 10 is resolved and more seedling boxes are supplied smoothly onto the conveyor 24, the seedling boxes waiting on the driven drive unit 40 are transferred the rotational force of the control drive unit 14 behind the driven drive unit 40 and are transported forward by the seedling boxes being transported forward.

[0056] In addition, the first supply detection sensor 26 and the second supply detection sensor 28 each detect a seedling box being supplied to the conveyor 24 from the seedling box supply device 10 located above them and transmit the signal to the control unit 34. When no seedling boxes are supplied to the conveyor 24 via the first supply detection sensor 26 for a period of time set by the operator, the control unit 34 controls the rotational force of the control motor 30, which provides rotational force to the control drive unit 14, to an off state only until the problem with the seedling box supply device 10 is resolved, and during that time, the control unit 34 controls the operation of the seedling box supply device 10 located in front of the problematic seedling box supply device 10 to an on state.

[0057] The control unit 34 receives a signal from the second supply sensor 28 and transmits an alarm or light signal to the operator, and the operator solves the problem occurring in the seedling tray supplying device 10 located above the control driving unit 14 and supplies more seedling trays to the control driving unit 14, and the operation of the seedling tray supplying device 10 located in front of the seedling tray supplying device 10 that has resumed supplying is stopped (Step S5).

[0058] At this time, signals from the first supply detection sensor 26 and the second supply detection sensor 28 are transmitted to the control unit 34, and it is preferable that a speaker and a warning light (not shown) are provided to transmit an alarm or light signal to the operator when the seedling trays are not normally supplied onto the conveyor.

[0059] In addition, the conveyor 24 may be provided with a number of sensors 42 that detect the seedling trays and transmit signals to the control unit 34. As a result, even if the seedling trays being transported on the conveyor are not transported normally from rear to front, the control unit 34 can smoothly control the seedling tray supplying machine 10, the controlled motor 30 and the uncontrolled motor 32 to be organically switched on and off.

[0060] The first supply detection sensor 26, the second supply detection sensor 28 and the detection sensor 42 are equipped with any one selected from a proximity sensor, an optical sensor, an ultrasonic sensor and a limit switch, but any sensor may be used as long as it can detect a seedling box being supplied onto the conveyor 24 from the seedling box supply machine 10 or a seedling box being transported on the conveyor 24 and transmit a signal to the control unit 34.

[0061] In the seedling box supplying process of the seedling box supplying conveyor having a number of seedling box supplying machines according to the present invention, the seedling boxes are first supplied to the conveyor 24 from the rearmost seedling box supplying machine 10 among the plurality of seedling box supplying machines 10 provided on the top of the conveyor 24, and when a problem occurs while the seedling boxes are being supplied to the conveyor 24 and the control unit 34 transmits a signal indicating that the seedling boxes are not being supplied to the conveyor 24, the control unit 34 controls the rotational force of the control motor 30 supplied to the control driving unit 14 where the problem occurred to stop the control driving unit 14, and the control unit 34 stops the control driving unit 14. By operating the seedling box supplying machine 10 located in front of the problem-solved seedling box supplying machine 10 and supplying the seedling boxes sequentially onto the conveyor 24, the seedling boxes can be smoothly supplied to the conveyor 24 while the problem with the problem-solved seedling box supplying machine 10 is being resolved, and when more seedling boxes are supplied to the conveyor 24 through the problem-solved seedling box supplying machine 10, the operation of the seedling box supplying machine 10 located in front of the problem-solved seedling box supplying machine 10 is stopped by control of the control unit 34, so the seedling boxes are not supplied overlapping on the conveyor 24 and the seedling boxes can be smoothly supplied and transported to the conveyor 24.

[0062] [Third embodiment] Seedling tray supply device DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific implementations of the present invention will be described in more detail with reference to the accompanying drawings.

[0063] 16 to 29, the seedling tray supplying device according to the present invention, which is provided with dual seedling tray supply means, comprises a conveyor 104 for transporting seedling trays 102 (not shown), a pair of seedling tray supplying means 106 provided on top of the conveyor 104 at a distance from each other in the front and rear directions, each of which supplies seedling trays 102 from the top to the inside and supplies the seedling trays 102 supplied to the inside to the top of the conveyor 104 so that the seedling trays 102 supplied to the top of the conveyor 104 are transported via the conveyor 104, and each of which is provided so that when one of the means is operated, the other is stopped from operating, and a control unit 108 provided on the conveyor 104 for controlling the operation of the conveyor 104 and the dual seedling tray supplying means 106.

[0064] First, a conveyor 104 is provided to transport seedling boxes 102 .

[0065] In this case, the seedling raising box 102 may be a normal one, and various sizes and shapes may be used.

[0066] A pair of upper frames 110 are provided on the conveyor 104, spaced apart on both sides and elongated in the front-to-back direction. Between the pair of upper frames 110, a number of transfer pulleys 112 are provided, spaced apart from each other in the front-to-back direction. The transfer pulleys 112 receive rotational force from a motor 114 operated under the control of the control unit 108. The rotation of the plurality of transfer pulleys 112 is synchronized with the rotation of a belt 116 on which seedling trays 102 supplied from the seedling tray supply means 106 are placed. Below each of the upper frames 110, extension frames 118 are provided, spaced apart from each other in the front-to-back direction and extending downward. Each extension frame 118 is provided with a height adjustment frame 120 that is slidable up and down and is formed to surround the extension frame 118. The extension frame 118 and the height adjustment frame 120 are fixed in sliding movement by height fixing devices 122 formed of bolts and nuts.

[0067] At this time, it is more preferable that the height-adjusting frame 120 is provided with height-adjusting holes 124 that penetrate vertically and vertically, and that each height-adjusting hole 124 is provided with a plurality of height-adjusting stop holes 126 that extend to one side and penetrate vertically at intervals, and that the sliding movement is fixed by height fixing devices 122.

[0068] In addition, it is preferable that the height of the height-adjustable frame 120 can be finely adjusted by providing fine adjustment fixing plates 128 on the front and rear of the height-adjustable frame 120, which extend in the direction facing each other while being spaced apart from the ground. Each fine adjustment fixing plate 128 is provided with a fine adjustment tool 130 whose upper part is connected to the fine adjustment fixing plate 128 by a screw thread and whose lower part extends to the ground.

[0069] Meanwhile, in the opposite direction of the height-adjustable frames 120 facing each other in the front and rear direction, wheel mounting plates 132 are provided at a distance from the ground, each of which is formed long on both sides and fixed on the height-adjustable frames 120, and both ends of which extend in the opposite direction of the height-adjustable frames 120. Each wheel mounting plate 132 is extended, and a rotating plate 134 is provided between the rotating plates 134 facing each other on both sides, and one end of each rotating plate 134 is hinged to each wheel mounting plate 132 so that it can rotate around an axis. Wheel axle inserting bases 136 are provided on both sides, each formed in a long cylindrical shape and connected and fixed onto the rotating plate 134. Wheels 138 are provided on both sides of the wheel axle inserting bases 136, each spaced apart from the rotating plate 134. The wheels 138 are connected to wheel axles 140 that pass through the rotating plate 134 and are inserted into the wheel axle inserting bases 136 so that they can rotate. Inserting base grooves 142 that are recessed inward are formed on the upper and lower sides of the wheel support plate 132 so that the wheel axle inserting bases 136 can be seated therein.

[0070] At this time, the operator can grasp the wheel shaft insertion table 136 and rotate the rotating plate 134 around the axis, thereby making it possible to easily move the seedling tray supply device of the present invention, which is equipped with dual seedling tray supply means, or to fix it in a single seat, and the insertion table groove 142 prevents the wheel shaft insertion table 136 from coming off the insertion table groove 142 even if the bottom is irregular.

[0071] Meanwhile, a pulley foreign matter removal port 144 is provided on the upper frame 110 of the conveyor 104. One end of the port 144 is fixed to the upper frame 110, and the other end of the port 144 extends into the groove of the transport pulley 112 in a direction that prevents the belt 116 from being depressed on the transport pulley 112, thereby removing foreign matter from inside the groove of the transport pulley 112. It is preferable to remove foreign matter from the transport pulley 112 and prevent the belt 116 from coming off.

[0072] A pair of seedling box supply means 106 are provided on the top of the conveyor 104, spaced apart from each other in the front and rear, and each supply seedling boxes 102 from the top to the inside, and supply the seedling boxes 102 supplied to the inside to the top of the conveyor 104 so that the seedling boxes 102 supplied to the top of the conveyor 104 are transported through the conveyor 104, and each is provided so that when one is operated, the other is stopped from operating.

[0073] Also provided is a control unit 108 that is provided on the conveyor 104 and controls the operation of the conveyor 104 and the seedling tray supply means 106 that are provided in duplicate.

[0074] At this time, the seedling tray supply means 106 is provided with a pair of rear cases 146 formed in a box shape, symmetrically formed on both sides, and concave inward on opposite sides. Behind the rear cases 146 is provided a main case 148 formed in a box shape on both sides, with both front sides connected to the rear of the rear cases 146, and concave forward on the inside of the rear. In front of the rear cases 146 are provided a pair of front cases 150 formed in a box shape, spaced apart in front of the rear cases 146, and concave inward on opposite sides. In front of the front cases 150 are provided sub-cases 152 formed in a box shape on both sides, with both rear sides connected to the front of the front cases 150, and concave backward on the inside of the front. Inside the main case 148 are provided a pair of cylinders 150 spaced apart on both sides, The shaft 154 is provided with a pair of cylinders 156 formed in opposite directions facing each other, and each cylinder shaft 154 is provided with a cylinder operating handle 158 whose upper part is hingedly connected to the cylinder shaft 154 and which extends downward. The lower inner part of each cylinder operating handle 158 is connected to an operating shaft 160 which is axially connected to the cylinder operating handle 158 and which extends forward while passing through the main case 148, rear case 146, front case 150, and sub-case 152. The inner operating shafts 160 of the rear case 146 and front case 150 are axially connected to the operating shafts 160, respectively, and are rotated by the operation of the cylinders 156. The operating shafts 160 extend in directions facing each other, and the lower parts of the extended shafts are provided with seedling tray mounting fixtures 162 on which the lower parts of the seedling trays 102 are mounted.

[0075] The upper portion of each of the cylinders 156 is fixedly connected to the upper portion of the inside of the main case 148, and the lower portion is hingedly connected to a cylinder fixing member 64 that extends downward and is hingedly connected to the cylinder 156, respectively.

[0076] At this time, a fixed cylinder 166 is provided inside each of the rear case 146 and the front case 150, and each of the fixed cylinders 166 is provided with a fixed cylinder shaft 168 that reciprocates in opposite directions to support both outer surfaces of the seedling raising box 102.

[0077] Meanwhile, the fixed cylinder shafts 168 are provided with raising box fixing bolts 170 (not shown) in the shape of a butterfly bolt, one end of which is connected to the fixed cylinder shaft 168 and the other end of which extends toward both sides of the raising box 102, or the fixed cylinder shafts 168 are provided with headless bolts 172 each having one end connected to the fixed cylinder shaft 168, and the other end of the headless bolts 172 is provided with raising box fixing devices 174 having one end connected to the headless bolt 172 and recessed grooves in a concave-convex shape on both sides of the raising box 102, but the shape can be modified in various ways.

[0078] In addition, a number of nuts are provided on the headless bolt 172 and the seedling box fixing device 174 to prevent the headless bolt 172 and the seedling box fixing device 174 from coming off the fixed cylinder shaft 168 and also to facilitate length adjustment.

[0079] Meanwhile, the seedling box fixing bolts 170 or seedling box fixtures 174 are provided to easily support both outer surfaces of the seedling box 102, and are formed so that they can support both outer surfaces of a single seedling box 102 formed with a narrow width or height in an optimized area to prevent interference with other stacked seedling boxes 102. If the seedling box fixing bolts 170 or seedling box fixtures 174 are formed with a narrower area or a conical shape with a narrower width in the direction of the seedling box 102, problems such as the outer surfaces of both sides of the seedling box 102 being damaged by strong pressure can be prevented.

[0080] The rear case 146 and the front case 150 are provided with seedling box separators 176 spaced apart from each other in the front and rear directions, each of which is fixedly connected to the operating shaft 160 and rotates with the rotation of the operating shaft 160. The seedling box separators 176 extend in the direction facing each other between the stacked seedling boxes 102 and rotate with the rotation of the operating shaft 160 to separate the stacked seedling boxes 102.

[0081] Each of the seedling box separators 176 is provided with an operating shaft fixture 178 which is cylindrical and is axially connected and fixed on the operating shaft 160 so as to be movable forward and backward. An extension plate 180 is provided on the operating shaft fixture 178, extending in the opposite direction to the seedling box 102 and being bent and extended in either direction. A support base 182 is provided in front of the extension plate 180, and is provided so as to be adjustable up and down and left and right on the extension plate 180 by means of bolts and nuts, with the front, rear, and lower portions being bent and extended toward the seedling box 102. Support base extension plates 184 are formed on the front and rear of the upper part of the support base 182, and are extended upward. Cylindrical extension plate shafts 186 are connected to the front and rear of the support base extension plate 184, and between the support base extension plate 184 The supporting base 182 is provided with seedling box separating plates 188 which are formed in a plate shape and extend in the direction between the stacked seedling boxes 102 to separate the stacked seedling boxes 102. At the front and rear of the seedling box separating plate 188, separation maintaining hinge plates 90 are provided which extend upward and are hingedly connected to extension plate shafts 186, and at the opposite sides of the seedling boxes 102, separation maintaining hinge plates 90 are provided which are extended and seated on the top of the supporting base 182. At the opposite sides of the seedling box separating plate 188 and the seedling boxes 102 below the supporting base 182, springs 192 are provided which are connected to both ends of the seedling box separating plate 188 so that the seedling box separating plate 188 rotates around its axis to separate the stacked seedling boxes 102 and then returns to a specified angle, and so that the seedling box 102 which has been lowered can smoothly return to its specified position even if a seedling box 102 stacked above it interferes with it.

[0082] At this time, the seedling box separating plate 188 rotates on its axis and is supported by the separation maintaining hinge plate 90 seated on the top of the support base 182 when separating the seedling boxes 102, so that the seedling box separating plate 188 maintains its fixed position and separates the stacked seedling boxes 102 with strong force. Furthermore, since the position of the seedling box separating tool 176 can be easily adjusted, seedling boxes 102 sandwiched between each other when stacked in various sizes can be easily separated.

[0083] Meanwhile, the seedling box separator 176 allows the lowest seedling box 102 stacked inside the seedling box supply means 106 to be smoothly separated from the seedling boxes 102 stacked above it and supplied to the conveyor 104, thereby enabling the seedling boxes 102 to be stably supplied to the conveyor 104 one by one.

[0084] In addition, it is preferable that the width of each of the seedling box separating plates 188 toward the seedling box 102 is gradually narrowed from front to back.

[0085] The lower parts of both sides of the upper part of the conveyor 104 and the lower part of the inside of the front case 150 are fixedly connected to each other and formed into a plate shape, which is extended upward, and the extended upper part is extended upward at an angle in the opposite direction to the seedling boxes 102, and is provided with seedling box transport guides 194 to guide the outer frame of the seedling boxes 102 so that they can move along a predetermined path.

[0086] At this time, it is preferable that a transport guide extension plate 96 is formed at the rear of each of the seedling box transport guides 194, extending at an angle in the opposite direction to the seedling box 102, so that the seedling box 102 can be transported stably on the conveyor 104.

[0087] The rear case 146 and the front case 150 have their lower parts connected and fixed to their upper parts, and their upper parts are bent at right angles and extended upward to surround the frame of the seedling raising box 102, and their upper ends are provided with stacking guides 198 that extend upward at an angle opposite to the seedling raising box 102.

[0088] At this time, the height of the stacking guide 198 can be freely formed and used depending on the number of seedling raising boxes 102 to be stacked, and the stacking guide 198 allows a large number of seedling raising boxes 102 to be stacked.

[0089] Each of the rear case 146 and the front case 150 is provided with a number of entry guides 1100 formed in the shape of a plate, which are arranged adjacent to the frame of the seedling box 102 recessed inside the seedling box supply means 106 and whose upper parts are connected to the rear case 146 and the front case 150, respectively.

[0090] At this time, the entry guide 1100 is provided on the rear case 146 and the front case 150 so that the distance from the frame direction of the seedling box 102 can be adjusted. This is to prevent the seedling boxes 102, which are formed in various sizes, from being caught on the seedling box fixing bolts 170 or seedling box fixing fixtures 174 provided on the fixing cylinder 166 and being unable to move downwards because they are locked on the seedling box fixing bolts 170 or seedling box fixing fixtures 174.

[0091] In addition, entry guide rollers 1102 may be further provided and used on the upper inside surfaces of the rear case 146 and the front case 150, which are provided facing each other in the front-to-rear direction and are axially connected to the rear case 146 and the front case 150 to support the outer surfaces of both sides of the seedling raising box 102.

[0092] Meanwhile, the distance between the main case 148 and the sub-case 152 is wider than the width of the front and rear of the seedling raising box 102, making it easy for an operator to hold the front and rear of the seedling raising box 102.

[0093] A sensor 1104 is provided on either the inside or outside of the rear case 146 or the front case 150 to detect when the seedling tray 102 is fed onto the conveyor 104, and the sensor 1104 can be any one or more of the conventional types.

[0094] At this time, the control unit 108 detects that the seedling tray 102 is being supplied to the conveyor 104 through the sensor 1104, and operates only one of the two seedling tray supply means 106 installed at a distance from each other.

[0095] Meanwhile, the cylinder 156 and the fixed cylinder 166 are either air, hydraulic or electric, and a cylinder pressure removing means 1106 is connected to the cylinder 156 and the fixed cylinder 166, respectively, to discharge, recover or cut off the air, hydraulic or electric power supplied to the cylinder 156 and the fixed cylinder 166, thereby enabling the seedling tray 102 sandwiched on the seedling tray supplying means 106 to be easily removed.

[0096] In addition, it is preferable that the rear case 146 and the front case 150 each have a seating adjustment hole 1108 formed therethrough so that the position of the seedling tray seating fixture 162 can be adjusted.

[0097] The upper frames 110 are provided at their lower portions with a space between them in the front and rear directions, with the upper portions of the upper frames 110 connected and fixed to the lower portions of the upper frames 110 and the lower portions extending downward. Opposite the front and rear directions of the upper frames 1110, there are provided lift frames (not shown) formed in the shape of square pipes and with the upper portions fixed to the lower portions of the upper frames 110.

[0098] In this case, the intrusion prevention device 1110 and the lift frame are provided not only to easily grasp the center of gravity of the seedling tray supplying device having dual seedling tray supplying means of the present invention when the seedling tray supplying device having dual seedling tray supplying means of the present invention is moved using a forklift, but also to prevent the seedling tray supplying device having dual seedling tray supplying means of the present invention from being damaged by the forks of the forklift.

[0099] The control unit 108 is provided with a number of operation buttons 1114 and switches 1116 that can turn on and off the conveyor 104 and the seedling tray supply means 106 all at once or individually. Apart from the operation buttons 1114, there is also provided a movement speed adjuster 1118 that can adjust the speed at which the conveyor 104 moves the seedling trays 102, and a switching speed adjuster 1120 that sets the standby time for operating a standby seedling tray supply means 106 in place of a failed seedling tray supply means 106.

[0100] Meanwhile, the control unit 108 controls the pair of seedling tray supply means 106 so that when one of the pair of seedling tray supply means 106 is operated, the other one is stopped from operating. When a problem occurs with the operated seedling tray supply means 106, the other seedling tray supply means 106 that has been on standby is operated to replace the seedling tray supply means 106 that has experienced the problem. The time is set to within 1 to 3 seconds, but can be freely adjusted depending on the working environment.

[0101] In addition, it is preferable that the control unit 108 is provided with a speaker 1122 or a warning light 1124 (not shown) to notify an operator when a problem occurs in the operating seedling tray supply means 106 and another seedling tray supply means 106 that was on standby is operated in place of the seedling tray supply means 106 that has the problem.

[0102] The seedling box supplying device according to the present invention, which is provided with a double seedling box supplying means, is provided with a double seedling box supplying means 106 spaced apart from each other in the front and rear, which supplies the seedling boxes 102 onto the conveyor 104 that transports the seedling boxes 102. The double seedling box supplying means 106 are arranged so that when one of them is operated, the other one stops operating. When a problem occurs in one of the seedling box supplying means 106 that supplied the seedling boxes 102 to the conveyor 104 and the seedling boxes 102 cannot be supplied to the conveyor 104, the other seedling box supplying means 106 stops operating. In addition, by automatically crossing the seedling box supply means 106 for a moment to supply the seedling boxes 102 to the conveyor 104, the seedling boxes 102 can be supplied to the conveyor 104 without any hindrance, regardless of whether it is a short or long time that an operator is repairing or inspecting the seedling box supply means 106 that has a problem. After the repair or inspection of the seedling box supply means 106 that has a problem is completed, the seedling boxes 102 can be supplied to the conveyor 104 again through the seedling box supply means 106 that has been repaired or inspected, which is advantageous in that the seedling boxes 102 can be supplied smoothly and continuously onto the conveyor 104. [Explanation of symbols]

[0103] 10 Seedling box feeding machine 12 Mainframe 14 Control drive unit 16 Uncontrolled drive 18 Support frame 20 Lifting frame 22 Height adjustment device 24 conveyor 26 First supply sensor 28 Second supply sensor 30 Control Motor 32 Uncontrolled motor 34 Control Unit 36 Control Conveyor 38 Uncontrolled conveyor 40 Driven part 42 Sensor 44 Roller 46 Pulley 104 Conveyor 106 Seedling box supply means 108 Control Unit 110 Upper Frame 112 Transfer pulley 114 Motor 116 Belt 118 Extension Frame 120 height adjustable frame 122 Height Fixture 124 Height adjustment hole 126 Height adjustment stop hole 128 Fine adjustment fixing plate 130 Fine adjustment tool 132 Wheel mounting plate 134 Rotating Plate 136 Wheel shaft insert stand 138 Wheels 140 Wheel shaft 142 Insertion table groove 144 Pulley foreign body remover 146 Rear Case 148 Main Case 150 Front case 152 Subcase 154 Cylinder shaft 156 cylinders 158 Cylinder operating handle 160 operating shaft 162 Seedling box anchorage 164 Cylinder Fixture 166 Fixed Cylinder 168 Fixed cylinder axis 170 Seedling tray fixing bolt 172 Headless bolt 174 Seedling box fixture 176 Seedling box separation tool 178 Operating shaft fixing device 180 Extension plate 182 Support stand 184 Support extension plate 186 Extension plate shaft 188 Seedling box separation board 190 Separation maintaining hinge plate 192 Spring 194 Seedling tray transport guide 196 Transfer guide extension plate 198 Stacking Guide 1100 Approach Guide 1102 Entry guide roller 1104 Sensor 1106 Cylinder pressure relief means 1108 Safety tool adjustment hole 1110 Entry prevention device 1114 Operation button 1116 Switch 1118 Movement speed adjuster 1120 Conversion speed adjuster

Claims

1. A conveyor for supplying seedling boxes is provided with a number of seedling box supplying devices, the number of which is provided at the top at a distance from each other in the front and rear directions, the number of which is stacked inside, and the number of seedling box supplying devices 10 at the bottom for sequentially supplying the seedling boxes one by one, A plurality of seedling tray supplying machines 10 are mounted on the upper part, spaced apart from each other in the front and rear directions, and main frames 12 are provided on the upper part, spaced apart from each other on both sides and formed long in the front and rear directions, and between the pair of main frames 12, a controlled drive unit 14 and an uncontrolled drive unit 16 are provided in order from rear to front, spaced apart from each other on both sides and connected to the main frames 12, and are provided to transport the seedling trays mounted on the upper part, and a plurality of support frames 18 are provided at the lower part of each main frame 12, spaced apart from each other and extending to the ground, and a lift frame 20 is provided at the lower part of each support frame 18, connected to the support frame 18 and slidable up and down on the support frame 18, and a conveyor 24 having height adjusters 22 screw-connected to the lower part of the lift frame 20 to move the lift frame 20 up and down; a first supply detection sensor 26 and a second supply detection sensor 28, which are respectively provided on the main frame 12 of the conveyor 24 at a distance from each other from rear to front, and which are respectively provided below the seedling tray supply devices 10 seated on the upper part of the main frame 12, for detecting each seedling tray supplied to the conveyor 24 through each seedling tray supply device 10; a controlled motor 30 and an uncontrolled motor 32, which are respectively connected to the lower main frame 12 of the controlled drive unit 14 and the uncontrolled drive unit 16 of the conveyor 24 and provide rotational force to the controlled drive unit 14 and the uncontrolled drive unit 16; a control unit 34 provided on the conveyor 24 to receive signals from the first and second supply sensors 26 and 28 and to control the operation of the controlled motor 30, the uncontrolled motor 32 and each seedling tray supplying device 10 according to the signals from the first and second supply sensors 26 and 28; The conveyor 24 is divided into a controlled conveyor 36 having a controlled drive 14 and an uncontrolled conveyor 38 having an uncontrolled drive 16; A plurality of the control conveyors 36 having the control drive units 14 are provided, and are sequentially connected to the rear of the non-control conveyors 38 having the non-control drive units 16; Between the controlled driving unit 14 and the uncontrolled driving unit 16 of the conveyor 24, there is provided a driven driving unit 40 which is spaced apart from each other in the front and rear directions and is connected to the main frame 12 on both sides by a shaft, and which is provided to transport the seedling trays placed on the top, and to which the rotational force of the controlled motor 30 and the uncontrolled motor 32 is not transmitted; A seedling tray supply conveyor equipped with a plurality of seedling tray supply devices, characterized in that a plurality of detection sensors 42 are provided on the conveyor 24 to detect the seedling trays and transmit signals to the control unit 34.

2. A number of raising boxes are provided at intervals from each other in the front and rear, and a number of raising boxes are stacked inside each of them. The lower part is provided with a raising box supplying machine 10 for supplying the raising boxes one by one. The lower part is provided with a raising box supplying machine 10, and the raising boxes are supplied from the raising box supplying machine 10. The upper part is provided with a main frame 12 that is spaced apart from each other on both sides and is formed long in the front and rear directions. Between the pair of main frames 12, both sides are spaced apart from each other in the front and rear directions and are connected to the main frame 12 by a shaft, so as to transport the raising boxes placed on the upper part. The main frame 12 is provided with a controlled driving unit 14 and a non-controlled driving unit 16, which are provided sequentially from the rear to the front. A plurality of support frames 18 are provided at the bottom of each main frame 12, spaced apart from one another and extending to the ground. A lifting frame 20 is provided at the bottom of each support frame 18, connected to the support frame 18 and capable of sliding up and down on the support frame 18. A lower part of each lifting frame 20 is screw-coupled to the lower part of the lifting frame 20, thereby enabling the lifting frame 20 to move up and down. a conveyor 24 having a height adjuster 22 for adjusting the height of the conveyor 24, a first supply detection sensor 26 and a second supply detection sensor 28 which are respectively provided on the main frame 12 of the conveyor 24 at a distance from rear to front, and which are respectively provided on the lower part of the seedling box supplying device 10 seated on the upper part of the main frame 12 and detect the seedling boxes supplied to the conveyor 24 through the seedling box supplying device 10; and a control drive unit 14 and a non-control drive unit 16 of the conveyor 24 which are respectively connected to the lower main frame 12 and are controlled. In a seedling box supplying process of a seedling box supplying conveyor having a number of seedling box supplying devices, the seedling box supplying device comprises a controlled motor 30 and an uncontrolled motor 32 which respectively provide rotational force to the controlled drive unit 14 and the uncontrolled drive unit 16, and a control unit 34 which is provided on the conveyor 24 and receives signals from a first feed detection sensor 26 and a second feed detection sensor 28 and controls the operation of the controlled motor 30, the uncontrolled motor 32 and each seedling box supplying device 10 in accordance with the signals from the first feed detection sensor 26 and the second feed detection sensor 28, A first step S1 of operating the control unit 34 to operate the controlled motor 30, the uncontrolled motor 32, the controlled driving unit 14, the uncontrolled driving unit 16, and the seedling tray supplying machine 10 located above the controlled driving unit 14; A second step S2 of supplying seedling boxes one by one from the seedling box supplying device 10 located above the control driving unit 14 to the control driving unit 14, detecting the seedling boxes being supplied through the first supply detecting sensor 26, and transmitting a signal to the control unit 34; A third step S3 of detecting through the first supply detection sensor 26 that a problem has occurred in the seedling tray supplying device 10 located above the control driving unit 14 and that the seedling trays are not being supplied to the control driving unit 14, and transmitting a signal to the control unit 34; A fourth step S4 of stopping the operation of the seedling tray supplying device 10, the control motor 30, and the control driving device 14 located above the controlled driving device 14, and operating the seedling tray supplying device 10 located in front of the stopped seedling tray supplying device 10 to supply seedling trays to the non-controlled driving device 16, detecting the seedling tray supplied to the non-controlled driving device 16 through the second supply detection sensor 28 and transmitting a signal to the control device 34; The control unit 34 receives a signal from the second supply sensor 28 and transmits an alarm or light signal to an operator, so that the operator can solve the problem occurring in the seedling tray supplying device 10 located above the control driving unit 14 and supply more seedling trays to the control driving unit 14, and the operation of the seedling tray supplying device 10 located in front of the seedling tray supplying device 10 whose supply has been resumed is stopped in a fifth step S5; The conveyor 24 is divided into a controlled conveyor 36 having a controlled drive portion 14 and an uncontrolled conveyor 38 having an uncontrolled drive portion 16. A plurality of control conveyors 36 having the control drive units 14 are provided and are sequentially connected to the rear of the non-control conveyors 38 having the non-control drive units 16. Between the controlled driving unit 14 and the uncontrolled driving unit 16 of the conveyor 24, there is provided a driven driving unit 40 which is spaced apart from each other in the front and rear directions and is connected to the main frame 12 on both sides with a shaft, and which is provided to transport the seedling trays placed on the top, and to which the rotational force of the controlled motor 30 and the uncontrolled motor 32 is not transmitted. A seedling box supplying process of a seedling box supplying conveyor having a plurality of seedling box supply devices, characterized in that a plurality of detection sensors 42 are provided on the conveyor 24 to detect the seedling boxes and transmit signals to the control unit 34.

3. a conveyor 104 provided for transporting the seedling trays 102; a pair of seedling box supply means 106 provided in a double arrangement spaced apart from each other in the front and rear above the conveyor 104, each of which supplies seedling boxes 102 from the top to the inside and then supplies the seedling boxes 102 supplied to the inside to the top of the conveyor 104 so that the seedling boxes 102 supplied to the top of the conveyor 104 are transported through the conveyor 104, and each of which is provided so that when one of the means is operated, the other is stopped from operating; a control unit 108 provided on the conveyor 104 to control the operation of the conveyor 104 and the double seedling tray supply means 106; The seedling tray supply means 106 includes a pair of rear cases 146 formed in a box shape, symmetrically formed on both sides, and concave inward on opposite sides. Behind the rear cases 146, there is a main case 148 formed in a long box shape on both sides, with its front sides connected to the rear of the rear cases 146, and its rear inner side concave forward. In front of the rear cases 146, there are a pair of front cases 150 formed in a box shape, spaced apart in front of the rear cases 146, and concave inward on opposite sides. In front of the front cases 150, there are sub-cases 152 formed in a long box shape on both sides, with its rear sides connected to the front of the front cases 150, and its front inner side concave backward. Inside the main case 148, there are sub-cases 152 spaced apart on both sides, with their cylinder axes 154 facing each other in opposite directions. a pair of cylinders 156 each having a shaft 154 hingedly connected to the shaft 154 at its upper end and extending downward; a cylinder operating handle 158 connected to the lower inner end of each cylinder operating handle 158 and axially fixed to the handle 158; and an operating shaft 160 connected to the lower inner end of each cylinder operating handle 158 and extending forward through the main case 148, the rear case 146, the front case 150, and the sub-case 152; and seedling tray mounting devices 162 connected to the inner inner shafts 160 of the rear case 146 and the front case 150 and axially fixed to the operating shafts 160, respectively, which are rotated by the operation of the cylinders 156 and extend in directions facing each other, with the lower portions of the extended shafts being adapted to mount the seedling trays 102.

4. 10. The seedling tray supplying device according to claim 3, wherein the conveyor 104 is provided with a pair of upper frames 110 spaced apart on both sides and elongated in the front-to-rear direction. A plurality of transfer pulleys 112 are provided between the pair of upper frames 110 and spaced apart from each other in the front-to-rear direction. The transfer pulleys 112 receive rotational force from a motor 114 operated under the control of a control unit 108. The rotation of the plurality of transfer pulleys 112 is synchronized with the rotation of a belt 116 on which seedling trays 102 supplied from a seedling tray supplying means 106 are placed. The upper frames 110 are provided with extension frames 118 spaced apart from each other in the front-to-rear direction and extending downward. Each extension frame 118 is provided with a height-adjustable frame 120 slidably moved up and down and surrounding the extension frame 118. The extension frame 118 and the height-adjustable frame 120 are fixed in sliding movement by height fixing members 122 formed of bolts and nuts.

5. 5. The seedling tray supplying device according to claim 4, wherein the height-adjusting frame 120 is provided with height-adjusting holes 124 each penetrating vertically and elongatedly, and each height-adjusting hole 124 is provided with a plurality of height-adjusting stop holes 126 each penetrating vertically and spaced apart from each other.

6. 5. The seedling tray supplying device with dual seedling tray supplying means according to claim 4, wherein the height-adjusting frames 120 are provided with fine adjustment fixing plates 128 extending in the direction facing each other while being spaced apart from the ground, and each fine adjustment fixing plate 128 is provided with a fine adjustment tool 130 whose upper part is connected to the fine adjustment fixing plate 128 by a screw thread and whose lower part extends to the ground.

7. 5. The seedling tray supplying device according to claim 4, wherein the height-adjustable frames (120) are provided with wheel support plates (132) spaced apart from the ground on opposite sides of the height-adjustable frames (120), the wheel support plates (132) being elongated on both sides and fixed on the height-adjustable frames (120), and both ends of the wheel support plates (132) extending in opposite directions of the height-adjustable frames (120). Each wheel support plate (132) is provided with a rotating plate (134) hinged at one end to each wheel support plate (132) so as to be rotatable about an axis. Between the rotating plates (134) facing each other, wheel axle inserting bases (136) are provided, each elongated and cylindrical on both sides and connected and fixed on the rotating plates (134). Wheels (138) are provided on both sides of the wheel axle inserting bases (136) spaced apart from the rotating plates (134), and the wheels (138) are connected to the wheel axle inserting bases (136) by wheel axles (140) that penetrate the rotating plates (134) and are rotatably inserted into the wheel axle inserting bases (136).

8. A seedling tray supplying device having dual seedling tray supplying means as described in claim 7, characterized in that an insertion base groove 142 is formed on each of the upper and lower sides of the wheel mounting plate 132, recessed inward so that the wheel shaft insertion base 136 can be seated therein.

9. 5. The seedling tray supplying device having dual seedling tray supplying means according to claim 4, characterized in that a pulley foreign matter remover 144 is provided on the upper frame 110 of the conveyor 104, one end of which is fixed to the upper frame 110 and the other end of which is extended into the groove of the transport pulley 112 in a direction in which the belt 116 does not sink on the transport pulley 112, thereby removing foreign matter inside the groove of the transport pulley 112.

10. The seedling tray supplying device having dual seedling tray supplying means as described in claim 3, characterized in that each of the cylinders 156 has an upper portion connected and fixed to the upper portion inside the main case 148, and a lower portion inside the cylinder 156 that extends downward and is hingedly connected to a cylinder fixing device 64 that is hingedly connected to each of the cylinders 156.

11. The rear case 146 and the front case 150 are provided with fixed cylinders 166 on the inside thereof, and the fixed cylinders 166 are provided with fixed cylinder shafts 168 that reciprocate in opposite directions to support both outer surfaces of the seedling boxes 102.

12. 12. The seedling box supplying device having dual seedling box supply means as described in claim 11, characterized in that on the fixed cylinder shafts 168, there are provided seedling box fixing bolts 170 in the form of butterfly bolts, one end of which is connected to the fixed cylinder shafts 168 and the other end of which extends in both directions of the seedling boxes 102.

13. 12. The seedling box supplying device with dual seedling box supply means according to claim 11, characterized in that a headless bolt 172 is provided on each of the fixed cylinder shafts 168, one end of which is connected to the fixed cylinder shaft 168 on the shaft, and a seedling box fixing device 174 is provided on the other end of each of the headless bolts 172, one end of which is connected to the headless bolt 172 and has a concave-convex groove on both sides of the other end of the seedling box 102.

14. 4. The seedling box supplying device with dual seedling box supply means according to claim 3, further comprising seedling box separators 176, each of which is provided between the rear case 146 and the front case 150 at a distance from each other in the front and rear directions, fixedly connected to the operating shaft 160 and axially rotated by the rotation of the operating shaft 160, and extending in a direction facing each other between the stacked seedling boxes 102 so as to be axially rotated by the rotation of the operating shaft 160 and to separate the stacked seedling boxes 102.

15. Each raising box separator 176 is provided with an operating shaft fixture 178 which is cylindrical and is axially connected and fixed on the operating shaft 160 so as to be movable forward and backward. An extension plate 180 is provided on the operating shaft fixture 178, extending in the opposite direction to the raising boxes 102 and being bent and extended in either direction. A support base 182 is provided in front of the extension plate 180, which is adjustable up and down and left and right on the extension plate 180 by means of bolts and nuts, and the front, rear and lower parts are bent and extended toward the raising boxes 102. Support base extension plates 184 are formed on the front and rear of the upper part of the support base 182, and are extended upward. Cylindrical extension plate shafts 186 are connected to the front and rear of the support base extension plates 184. Plate-shaped extension plate shafts 186 are provided between the support base extension plates 184, and are formed to adjust the height of the stacked raising boxes 102.

15. The seedling box supplying device according to claim 14, further comprising: a seedling box separating plate (188) extending in the vertical direction to separate the stacked seedling boxes (102); and a separation maintaining hinge plate (90) extending upward from the front and rear of the seedling box separating plate (188) and hingedly connected to the extension plate shaft (186), and extending in the opposite direction from each seedling box (102) and seated on the top of the support base (182). The seedling box separating plate (188) and the seedling boxes (102) below the support base (182) are provided with springs (192) connected at both ends to separate the seedling box separating plate (188) when the seedling box separating plate (188) rotates around its axis to separate the stacked seedling boxes (102) and then returns to a designated angle, and the seedling box (102) that has been lowered is smoothly returned to its designated position even if a seedling box (102) stacked above it interferes with the raising box (102).

16. 16. The seedling box supplying device with double seedling box supplying means according to claim 15, wherein the seedling box separating plates 188 are formed in a shape in which the widths of the seedling boxes 102 toward the front and rear of the seedling box separating plates 188 gradually become narrower.

17. 4. The seedling box supplying device with dual seedling box supply means according to claim 3, characterized in that the lower parts of both sides of the upper part of the conveyor 104 and the lower part of the inside of the front case 150 are connected and fixed, and are formed in a plate shape and extended upward, and the extended upper parts are extended upward at an incline in the opposite direction to the seedling boxes 102, and are provided with seedling box transport guides 194 to guide the outer frames of the seedling boxes 102 so that they can enter along a predetermined path.

18. The seedling box supplying device having dual seedling box supply means as described in claim 17, characterized in that a transport guide extension plate (96) is formed at the rear of each of the seedling box transport guides (194), extending at an angle in the opposite direction of the seedling box (102).

19. The rear case 146 and the front case 150 have their lower parts connected and fixed to their upper parts, their upper parts are bent at right angles and extended upward to surround the frame of the seedling box 102, and their upper ends are provided with stacking guides 198 that extend upward at an angle opposite to the seedling box 102.

20. 4. The seedling box supplying device with dual seedling box supplying means according to claim 3, characterized in that the rear case 146 and the front case 150 are each provided with a plurality of plate-shaped entry guides 1100 which are provided adjacent to the frame of the seedling box 102 recessed inside the seedling box supplying means 106 and whose upper parts are connected and fixed to the rear case 146 and the front case 150, respectively.

21. 4. The seedling tray supplying device having dual seedling tray supply means as described in claim 3, wherein the distance between the main case 148 and the sub-case 152 is wider than the front and rear width of the seedling tray 102.

22. The rear case 146 and the front case 150 are provided at their respective inner upper portions with inlet guide rollers 1102 facing each other in the front-rear direction and axially connected to the rear case 146 and the front case 150 to support both outer surfaces of the seedling boxes 102.

23. A seedling tray supplying device having dual seedling tray supply means as described in claim 3, characterized in that a sensor 1104 for detecting that a seedling tray 102 is supplied to the conveyor 104 is provided on the inside or outside of either or both of the rear case 146 and the front case 150.

24. 4. The seedling tray supplying device with dual seedling tray supply means according to claim 3, wherein the cylinder 156 and the fixed cylinder 166 are powered by any one selected from air, hydraulics, and electricity.

25. 25. The seedling tray supplying device with dual seedling tray supplying means as described in claim 24, characterized in that a cylinder pressure removing means 1106 is connected to the cylinder 156 and the fixed cylinder 166, respectively, to discharge, recover or cut off the air, hydraulic pressure and electricity supplied to the cylinder 156 and the fixed cylinder 166, thereby making it possible to easily remove the seedling trays 102 sandwiched on the seedling tray supplying means 106.

26. The rear case (146) and the front case (150) each have a mounting hole (1108) formed therethrough to adjust the position of the seedling tray mounting device (162).

27. 5. The seedling tray supplying device having dual seedling tray supplying means according to claim 4, characterized in that the lower parts of the upper frames 110 are provided with intrusion prevention devices 1110 spaced apart from each other in the front and rear, each having an upper part connected and fixed to the lower part of the upper frame 110 and a lower part extending downward.

28. The seedling tray supplying device having dual seedling tray supplying means as described in claim 27, characterized in that a lift frame formed in a square pipe shape and having an upper part fixed to the lower part of the upper frame 110 is provided on the opposite side of the intrusion prevention device 1110 facing forward and backward.

29. The control unit 108 controls the pair of seedling tray supplying means 106 so that when one of the pair of seedling tray supplying means 106 is operated, the other one is stopped from operating, and the time during which the other seedling tray supplying means 106 that has been on standby is operated to replace the seedling tray supplying means 106 that has experienced a problem when the operated seedling tray supplying means 106 has a problem is set to within 1 to 3 seconds.

30. The control unit 108 is provided with a plurality of operation buttons 1114 and switches 1116 for turning on and off the conveyor 104 and the seedling box supplying means 106 all at once or individually, and is provided with a moving speed adjuster 1118 that is separate from the operation buttons 1114 and that can adjust the transport speed of the seedling boxes 102 on the conveyor 104, and a switching speed adjuster 1120 that sets the standby time for operating the seedling box supplying means 106 in place of the seedling box supplying means 106 that has encountered a problem.

31. The seedling tray supplying device having dual seedling tray supplying means as described in claim 29, characterized in that the control unit 108 is provided with a speaker 1122 or a warning light 1124 to notify an operator when a problem occurs in the seedling tray supplying means 106 that was in operation and another seedling tray supplying means 106 that was on standby is operated in place of the seedling tray supplying means 106 that has the problem.

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