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KR-102962363-B1 - Seedling box loading and unloading device with seedling box entry prevention means

KR102962363B1KR 102962363 B1KR102962363 B1KR 102962363B1KR-102962363-B1

Abstract

The present invention relates to a seedling box stacking and extraction device having a seedling box entry prevention means, and more specifically, to a seedling box stacking and extraction device having a seedling box entry prevention means that seedling boxes discharged after sowing soil and seeds from a sower are kept awaiting stacking using an entry prevention means, are automatically stacked sequentially, and the stacked seedling boxes are automatically extracted. The present invention for this purpose relates to a seedling box stacking and extraction device configured to receive seedling boxes (4) sown with soil and seeds via a conveyor and stack them, and to extract seedling boxes (4) stacked in a specified quantity. The seedling box stacking and extraction device comprises a stacking means (A) installed on the ground and an extraction means (B) installed on the upper side of the stacking means (A). The stacking means (A) comprises: a stacking conveyor (12) connected to the conveyor (6) and having a plurality of conveyor rollers (10) on its inner side; a cover (14) connected to the lower part of the stacking conveyor (12) and having a space formed therein that can accommodate it; and a motor (16) provided on the inner side of the cover (14) and supplying rotational force to the conveyor rollers (10). A control unit (18) provided on one side of the stacking conveyor (12) and connected to a motor (16), and provided with a plurality of buttons to control the rotational speed of the motor (16); an entry prevention unit (46) connected to the lower part of the stacking conveyor (12) to prevent entry of a seedling box (4); a lifting unit (64) provided on one side of the entry prevention unit (46) to raise and lower the seedling box (4); and a stacking unit (80) provided spaced apart from each other on the upper part of the stacking conveyor (12) to stack the seedling boxes (4). A lifting operating unit (88) is provided on the stacking conveyor (12) and on the other side of the lifting unit (64), and has a push plate (82) formed on the inner side so as to be inclined upward toward the other side and to be formed to contact one side of the seedling box (4) being transported, and a rotating plate (84) is provided on the rear side that is axially connected and rotates, and the rotating plate (84) is provided with a rotating plate tension member (86) that is connected to the stacking conveyor (12) and provides tension; The above-mentioned stacking conveyor (12) is configured to be in contact with a rotating plate (84) at the rear, and a lifting sensor (90) that transmits a rotation signal of the rotating plate (84) to a control unit (18) to facilitate the operation of a cylinder (52); and the above-mentioned extraction means (B) comprises: a sliding plate (102) formed in a flat shape at the front of the stacking conveyor (12) and connected thereto, with both ends extended upward, and a sliding hole (100) formed through each of the extended sides so that a locking rod (96) can slide; and a tension adjustment fixing plate (104) connected to the locking rod (96) of the above-mentioned lifting operation unit (88) and in close contact with one side of the inner side of the sliding plate (102). A tension adjustment member (106) that is fitted onto the outer circumference of the locking rod (96) of the above lifting operation part (88), is provided on the other side of the tension adjustment member fixing plate (104), and is provided on the inner side of the sliding plate (102) to provide a constant tension to the locking rod (96); a lifting member (122) that is symmetrically provided on both upper sides and the front and rear of the above stacking conveyor (12) to lift the seedling box (4); a rear support member (140) formed in a plate shape and provided on the other side of the upper part of the above stacking conveyor (12); a pull-out case (144) that is spaced apart from the upper part of the above stacking conveyor (12), has a accommodating space formed on the inner side, and has a pull-out support member (142) connected to the upper part of the above stacking conveyor (12) on the lower side; and a pull-out motor (146) provided on the inner side of the pull-out case (144) and providing rotational force. A pull-out driven gear unit (150) having a pair of pull-out driven gears (148) spaced apart from each other and axially connected to the inside of the pull-out case (144) to receive rotational force from a pull-out motor (146); a pair of first transmission gear units (156) having a pair spaced apart from each other and symmetrically provided in front of the pull-out driven gear unit (150), each having an opposite side facing each other axially connected to the inside of the pull-out case (144), each having a transmission gear (152) that receives rotational force from the pull-out driven gear (148), and each having a first chain gear (154) in the direction facing the transmission gear (152). A second transmission gear section (160) having a pair of symmetrically spaced apart on both sides in front of the first transmission gear section (156), each having opposite sides facing each other and axially connected on the inside of the extraction case (144), and each having a second chain gear (158) corresponding to the first chain gear (154); a pair of transmission chains (162) connected to the first chain gear (154) and the second chain gear (158) to transmit the rotational force of the first chain gear (154) to the second chain gear (158); and a transfer member (166) formed in a flat shape between the pair of transmission chains (162), with an elongated bearing hole (164) formed on both sides on the inside. A transfer shaft (170) having a transfer bearing (168) that is formed as a cylindrical shaft and inserted into the bearing hole (164) of the transfer member (166), with both ends extended and each end connected and fixed to a transfer chain (162), and seated in the bearing hole (164) on the shaft to enable vertical transfer; a transfer plate (172) formed as a plate and connected to the lower part of the transfer member (166); and a transfer member (176) formed as a plate and connected to the lower part of the transfer plate (172), with the lower part extended downward and the extended end bent and extended backward to form a locking part (174) that supports the lower part of the seedling box (4). The present invention provides a seedling box stacking and extraction device having a seedling box entry prevention means, characterized by comprising: an extraction control unit (178) provided on the extraction case (144) and configured to control the rotational force of the extraction motor (146).

Inventors

  • 구진섭
  • 구기현

Dates

Publication Date
20260508
Application Date
20251118

Claims (14)

  1. In a seedling box stacking and extraction device that is equipped to receive seedling boxes (4) sown with soil and seeds via a conveyor and stack them, and to extract seedling boxes (4) stacked in a designated quantity, The above seedling box stacking and unloading device is composed of a stacking means (A) installed on the ground and an unloading means (B) installed on the upper side of the stacking means (A), wherein The above stacking means (A) is, A stacking conveyor (12) connected to the above conveyor (6) and having a plurality of conveyor rollers (10) on the inside; A cover (14) connected to the lower part of the stacking conveyor (12) and having a space formed therein that can be accommodated; A motor (16) provided on the inner side of the above cover (14) and supplying rotational force to the conveyor roller (10); A control unit (18) provided on one side of the stacking conveyor (12) and connected to the motor (16), and provided with a plurality of buttons to control the rotational speed of the motor (16); An entry prevention device (46) connected to the lower part of the stacking conveyor (12) to prevent entry of the seedling box (4); A lifting unit (64) provided on one side of the above-mentioned entry prevention unit (46) for raising and lowering the seedling box (4); A stacking member (80) spaced apart from each other on the upper part of the stacking conveyor (12) for stacking seedling boxes (4); A lifting operating unit (88) is provided on the stacking conveyor (12) and on the other side of the lifting unit (64), and has a push plate (82) formed on the inner side so as to be inclined upward toward the other side and to be formed to contact one side of the seedling box (4) being transported, and a rotating plate (84) is provided on the rear side that is axially connected and rotates, and the rotating plate (84) is provided with a rotating plate tension member (86) that is connected to the stacking conveyor (12) and provides tension; It comprises a lifting sensor (90) that is provided to contact a rotating plate (84) at the rear of the stacking conveyor (12) and transmits a rotation signal of the rotating plate (84) to a control unit (18) to facilitate the operation of the cylinder (52). The above withdrawal means (B) is, A sliding plate (102) formed in a flat shape and connected to the front of the stacking conveyor (12), with both ends extended upward, and sliding holes (100) formed through each of the extended sides so that a locking rod (96) can slide. A tension adjustment fixing plate (104) connected to the locking rod (96) of the above lifting operating part (88) and in close contact with one side of the inner side of the sliding plate (102); A tension adjustment member (106) that is fitted onto the outer circumference of the locking rod (96) of the above-mentioned lifting operating part (88), is provided on the other side of the tension adjustment member fixing plate (104), and is provided on the inner side of the sliding plate (102) to provide a constant tension to the locking rod (96); Lifting ports (122) that are symmetrically provided on both upper sides and front and rear of the stacking conveyor (12) to raise and lower seedling boxes (4); A rear support member (140) formed in a plate shape and provided on the upper side of the stacking conveyor (12); A withdrawal case (144) spaced apart from the upper part of the stacking conveyor (12), having a accommodable space formed on the inner side, and having a withdrawal support (142) connected to the upper part of the stacking conveyor (12) on the lower side; A pull-out motor (146) provided on the inside of the pull-out case (144) and providing rotational force; A pull-out driven gear unit (150) is provided with shaft connections on both sides inside the pull-out case (144), and a pair of pull-out driven gears (148) spaced apart from each other are provided on the shaft to receive rotational force from a pull-out motor (146); A pair of first transmission gears (156) are symmetrically provided on both sides spaced apart in front of the above-mentioned extraction driven gear unit (150), each having an opposite side facing each other and connected by an axis on the inside of the extraction case (144), each having a transmission gear (152) that receives rotational force from the extraction driven gear (148), and each having a first chain gear (154) provided in the direction facing the transmission gear (152); A second transmission gear unit (160) having a pair of symmetrically spaced apart on both sides in front of the first transmission gear unit (156), each having opposite sides facing each other connected by shafts on the inside of the extraction case (144), and each having a second chain gear (158) corresponding to the first chain gear (154); A pair of transmission chains (162) connected to the first chain gear (154) and the second chain gear (158) to transmit the rotational force of the first chain gear (154) to the second chain gear (158); A transfer member (166) is formed in a flat shape between a pair of the above-mentioned transfer chains (162) and has a bearing hole (164) in the shape of an elongated hole formed on both sides on the inside; A transfer shaft (170) having a transfer bearing (168) formed as a cylindrical shaft and inserted into the bearing hole (164) of the transfer member (166), with both ends extended and each end connected and fixed to a transfer chain (162), and seated in the bearing hole (164) on the shaft so as to be transportable up and down; A transfer plate (172) formed in a plate shape and connected to the lower part of the transfer member (166); A transfer plate (176) formed in a plate shape and connected to the lower part of the transfer plate (172), with the lower part extending downward and the extended end being bent backward to form a locking part (174) that supports the lower part of the seedling box (4); A seedling box stacking and extraction device having a seedling box entry prevention means, characterized by comprising: an extraction control unit (178) provided on the extraction case (144) to control the rotational force of the extraction motor (146).
  2. In paragraph 1, The above entry prevention device (46) is connected to the lower part of the stacking conveyor (12), and a support plate (20) is provided in the central part, formed in a plate shape, with the front and rear ends each extending upward to connect with the stacking conveyor (12). A sliding hole (22) is formed on the inner side of the support plate (20) and penetrates vertically while spaced apart in the front and rear directions. Between the sliding holes (22) of the support plate (20), a spacing hole (24) is formed that penetrates vertically while spaced apart from each other. A spacing bolt (26) that is height-adjustable and protrudes upward is coupled to the spacing hole (24). An upper tension hole (28) that penetrates vertically is formed in the center of the support plate (20). A sliding plate (30) is provided on the lower part of the support plate (20) and is formed in a plate shape and spaced apart from the support plate (20). On the inner side of the sliding plate (30), a hole that penetrates corresponding to the upper tension hole (28) is provided. A lower tension hole (32) is formed, and a sliding rod (34) is provided on the upper part of the sliding plate (30) and formed in a cylindrical shape so as to be slidable on the sliding hole (22). In the upper tension hole (28) and the lower tension hole (32), a tension member (38) is provided, with the upper and lower ends respectively fixed to the support plate (20) and the sliding plate (30) by a fixing member (36) to provide tension. On the upper part of the support plate (30), an entry prevention wall (44) is provided, which is formed in a flat shape with the lower end connected to the upper end of the sliding rod (34), and on one side, a locking partition (40) and an entry prevention partition (42) are formed with their upper ends spaced apart from each other and extending upward. The above lifting unit (64) is provided on one side of the entry prevention unit (46) and is connected to the lower part of the stacking conveyor (12). A cylinder fixing plate (48) is provided, which is formed in a plate shape and has its front and rear ends connected to the stacking conveyor (12). A cylinder (52) is provided at the lower part of the cylinder fixing plate (48), with its upper end fixed and a cylinder rod (50) extending upward through the cylinder fixing plate (48) and operating upon receiving a signal from the control unit (18). A seedling box lifting plate (54) is connected to the upper part of the cylinder rod (50), which is formed in a flat plate shape and has its other end resting on the upper part of the retaining partition (40). On the outer side spaced apart from the cylinder (52), a height adjustment guide rod (56) is provided, which is formed in a cylindrical shape, with its upper end connected to the lower part of the seedling box lifting plate (54) and its lower end extending through the cylinder fixing plate (48). A seedling box stacking and extraction device having a seedling box entry prevention means, characterized in that a height adjustment guide (58) connected to an axis is provided on the height adjustment guide rod (56), a plate-shaped sensor fixing plate (60) is provided on the lower part of the cylinder fixing plate (48), and a height adjustment sensor (62) is provided on the sensor fixing plate (60) to be in contact with the height adjustment guide (58) and to transmit a signal to the control unit (18).
  3. In paragraph 2, The stacking members (80) are spaced apart from each other on the upper side of the stacking conveyor (12) and are symmetrically provided in pairs on the front and rear sides of the seedling box lifting plate (54). Each is provided with a fixed mounting member (66) that extends upward and penetrates forward and rear. On the inner side of the fixed mounting member (66), a first shaft (68) is formed that is axially installed from one side to the other. On the first shaft (68), an inclined plate (70) is formed that is curved and extended inward toward the stacking conveyor (12). On the upper side of each inclined plate (70), a locking plate (72) is formed that extends outward toward the stacking conveyor (12). On the outer side of each locking plate (72), an anti-detachment plate (74) is formed that extends upward and is formed so that its inner side is mounted on the outer side of the fixed mounting member (66). On the outer side of each first shaft (68) A seedling box stacking and extraction device having a seedling box entry prevention means, characterized in that a second shaft (76) is formed on a fixed mounting bracket (66), and a stacking spring (78) is provided on the inner outer circumference of the second shaft (76) to surround the second shaft (76) and extends to supply a constant tension to the inclined plate (70).
  4. In paragraph 3, Each of the above stacking members (80) is provided with a seedling box detachment prevention member (94) formed in a plate shape in the direction facing the stacking member (80) to prevent the seedling box (4) from detaching, and each detachment prevention plate (74) is provided with a noise reduction member (96) formed as a spring. A pair of other-side detachment prevention plates (98) are provided, which are spaced apart from the upper side of the stacking conveyor (12) and are respectively provided at the front and rear, and extend upward, and are connected to the other side of the stacking member (80) provided on the other side to prevent the seedling box (4) from detaching, and each of the other-side detachment prevention plates (98) is formed such that its lower side is inclined downward in the direction of the other side. A seedling box stacking and extraction device having a seedling box entry prevention means, characterized by having a seedling box entry prevention plate (100) provided on one side of the upper part of the stacking conveyor (12) and formed in a plate shape to prevent the seedling box (4) from entering further to one side.
  5. In paragraph 4, The above lifting opening (122) is symmetrically provided on both upper sides and front and rear of the stacking conveyor (12), and each is provided with a pair of flat plates with a lower portion bent and spaced symmetrically in both directions, and a fixing support (107) is provided with the lower portion fixed to the upper part of the stacking conveyor (12). A first shaft (108) is formed on the inner side of each pair of fixing supports (107) and extends from one side to the other. A locking plate (109) is formed on each of the first shafts (108) and extends in a curved direction toward the outer side of each stacking conveyor (12). Additionally, an inclined plate (110) is formed on the upper side of each locking plate (109) and inclined upwardly toward the inner side of the stacking conveyor (12). A seedling box support plate (111) is formed at each end of the inclined plate (110) and extends toward the outer side of the stacking conveyor (12). A seedling box stacking and extraction device having a seedling box entry prevention means, characterized in that a second shaft (112) is formed on the outer side of each first shaft (108) and is mounted on a fixed support (107), and a lifting tension member (113) is provided on the inner outer circumference of the second shaft (112) to surround the second shaft (112) and is supported on the upper part of the locking plate (109) and the stacking conveyor (12) and supplies a constant tension to the locking plate (109), and a third shaft (114) is formed on the upper part of the first shaft (108) and is mounted on the fixed support (107) and is provided between the locking plate (109) and the inclined plate (110).
  6. In paragraph 5, A pair of origin sensor protrusions (180) and stop sensor protrusions (181) protruding upward are formed on the upper part of the transfer member (166), and an origin sensor (182) and a stop sensor (184) are provided on the upper part of the pair of origin sensor protrusions (180) and stop sensor protrusions (181), with the lower part fixed to the withdrawal case (144) and respectively provided to contact the origin sensor protrusions (180) and stop sensor protrusions (181) and transmit the contacted signal to the withdrawal control unit (178). A seedling box stacking and extraction device having a seedling box entry prevention means, characterized in that the lower part of the extraction case (144) is provided with a sliding guide (186) having a rectangular pipe shape that is spaced apart from each other and has an open opposite side facing each other, and each sliding guide (186) is provided with a plurality of sliding bearings (188) that are inserted therein, and each sliding bearing (188) is axially connected to a sliding plate (190) that is provided in a flat shape on the outside, and the lower part of the sliding plate (190) is fixed to the upper part of the transfer plate (172).
  7. In paragraph 6, A pair of push plates (192) spaced apart on both sides are provided at the upper front of the transfer plate (172), and a push member (196) is provided symmetrically on both sides in front of each push plate (192), which is pushed forward by the movement of the push plate (192) and has a push bearing (194) at the end adjacent to the push plate (192). Each push member (196) is provided with an extension member (198) that is axially connected to the opposite side of the push bearing (194) and extends to the rear, and an upper link member (200) that is axially connected to the extension member (198) is provided on the extension member (198), and a link fixing plate (202) is provided at the lower part of each upper link member (200), which is formed in a plate shape, extends to the rear, and has its rear end fixed to the lower part of the extraction case (144), and at the lower part of the link fixing plate (202), each spaced apart A lower link member (204) is provided, and the upper link member (200), link fixing plate (202), and lower link member (204) are axially connected to rotate by a cylindrical link shaft (206). A locking plate (210) having an elongated locking hole (208) that penetrates vertically on the inner side is axially connected to the lower link member (204). A locking fixing plate (214) is provided on the lower side of the locking plate (210), formed in a flat shape and connected to the upper side of the stacking conveyor (12), and on the upper side, having a locking projection (212) that protrudes in a cylindrical shape and penetrates the locking hole (208). On the side of the locking fixing plate (214) adjacent to the lifting port (122), a lifting port support plate (216) is provided, which extends upward in a plate shape and has a front end bent to extend to the rear of the lifting port (122). A seedling box stacking and extraction device having a seedling box entry prevention means, characterized in that both sides of a lifting support plate spring (218) providing tension are respectively connected between the lifting support plate (216) and the lifting port (122).
  8. In Paragraph 7, On each side of each of the above-mentioned lifting shafts (122), lifting shaft bearings (220) are provided that are axially connected to the lifting shafts (122), and each of the lifting shaft bearings (220) has an upper portion that is higher than the upper portion of the lifting shaft (122). A seedling box stacking and extraction device having a seedling box entry prevention means, characterized in that a height adjustment plate (232) having a height adjustment hole (230) on the inner side is provided on the extraction support (142), and a quantity confirmation sensor (222) is provided on the height adjustment plate (232) which is coupled to the height adjustment hole (230) to detect the number of seedling boxes (4) loaded and transmit it to a control unit (22) and an extraction control unit (178).
  9. In paragraph 8, The time taken for the above transfer unit (176) to move from the front to the rear and return to its original position is formed to be shorter than the time taken for one seedling box (4) to be stacked, and A seedling box stacking and extraction device having a seedling box entry prevention means, characterized in that a plurality of buttons (224) for turning ON/OFF the extraction motor (146), origin sensor (182), and stop sensor (184) are formed in front of the extraction control unit (178), and a seedling tray quantity display unit (226) indicating the quantity of seedling boxes (4) is formed on the upper part of the buttons (224).
  10. In Paragraph 9, A seedling box stacking and extraction device having a seedling box entry prevention means, characterized in that the extraction of a seedling box (4) by the above-mentioned conveyor (176) is carried out through an extraction conveyor (512) perpendicular to the stacking conveyor (12), and a roller (522) is provided at a position higher than the extraction conveyor (512) at the starting end of the extraction conveyor (512) so that the bottom surface of the lower seedling box (4) moves smoothly.
  11. In Paragraph 10, A seedling box stacking and extraction device having a seedling box entry prevention means, characterized in that, in order to prevent impact and set the position when the seedling box (4) enters the above-mentioned conveyor (176), an impact elasticity prevention piece (532) is provided in front of the entry direction of the seedling box (4), wherein the impact elasticity prevention piece (532) is provided as a pair, a rotation shaft (534) is connected to the lower end, the rotation shaft (534) is connected to a movable bracket (535), the movable bracket (535) is connected to one end of an elastic spring (536), and the other end of the elastic spring (536) is connected to a distance adjustment rod (537) having a horizontal slot (538) to adjust the elasticity.
  12. In Paragraph 11, A seedling box stacking and extraction device having a seedling box entry prevention means, characterized in that when the button (224) of the extraction control unit (178) is pressed to switch the extraction motor (146), origin sensor (182), and stop sensor (184) from the OFF state to the ON state, the position of the origin sensor projection (180) is always moved to the lower part of the origin sensor (182), and the stop sensor projection (181) is also moved to the lower part of the stop sensor (184), so that the movement of the transfer member (166) is stopped by the signal of the stop sensor (184) and the transfer member (166) is configured to be in a waiting state for movement.
  13. In Paragraph 12, A seedling box stacking and extraction device having a seedling box entry prevention means, characterized in that a center bearing (221) is provided on the inner side of the seedling box support plate (111) of the above-mentioned lifting opening (122) and is axially connected and has its upper portion higher than the upper portion of the seedling box support plate (111), and an oil catcher (234) is provided on the lower portion of the above-mentioned transmission chain (162) to receive oil or foreign matter falling from the upper portion.
  14. In Paragraph 13, An oil collection container (236) is provided in front of the oil collection container (234) to receive oil or foreign matter collected in the oil collection container (234), and an oil drainage pipe (238) is provided at the bottom of the oil collection container (236) to discharge the collected oil or foreign matter to the outside. The above oil tray (234) is formed with a downward slope at the front compared to the rear, and is provided in pairs, each spaced apart from the transfer port (166) so as not to interfere with the movement of the transfer port (166), thereby forming a seedling box stacking and extraction device having a seedling box entry prevention means.

Description

Seedling box loading and unloading device with seedling box entry prevention means The present invention relates to a seedling box stacking and extraction device having a seedling box entry prevention means, and more specifically, to a seedling box stacking and extraction device having a seedling box entry prevention means that seedling boxes discharged after sowing soil and seeds from a sower are kept awaiting stacking using an entry prevention means, are automatically stacked sequentially, and the stacked seedling boxes are automatically extracted. Generally, a seeder is used to easily and accurately sow seeds and apply top dressing in furrows created for cultivating paddy crops, such as rice seeds used for paddy farming, and field crops, such as onions and leeks. This sower feeds seedling trays and supplies soil and seeds into them, and the seedling trays with sown seeds are discharged from the sower and transported to the germination site. Meanwhile, a seedling box transfer device was previously proposed in Korean Registered Patent No. 10-1039193 (hereinafter referred to as the 'prior art document'). In the prior art literature proposed as described above, seedling boxes that are drawn out one by one from a sower and supplied to a loading frame are arranged in a certain quantity on the loading frame by a movement control unit, then positioned on a transfer bed by a transfer unit, and then transferred to a germination room by a discharge transfer unit pulling the transfer bed and moving sequentially on the transfer frame. In this way, seedling boxes drawn out one by one from the sower are arranged flatly on a stacking frame and then transported. However, the seedling box conveying device disclosed in the prior art literature is equipped so that seedling boxes withdrawn from a sower are arranged on a stacking frame, but it has the disadvantage that the overall work process proceeds slowly because it takes a long time to transport the arranged seedling boxes from the stacking frame. That is, seedling boxes with soil and seeds sown in the sower are quickly conveyed and supplied to the stacking frame, and the conveyed seedling boxes are arranged on the stacking frame and discharged in an aligned state. However, since it takes a certain amount of time to discharge the seedling boxes from the stacking frame during this process, the supply speed of the sown seedling boxes supplied to the stacking frame must be slowed down accordingly, which slows down the overall work process. Furthermore, in the prior art literature, despite providing a large surface area for the stacking frame due to the seedling boxes arranged on it, there is a limit to the number of seedling boxes that can be accommodated relative to the large surface area, so many seedling boxes cannot be provided on the stacking frame, resulting in a disadvantage of reduced work efficiency and production efficiency. Therefore, there is a need for a seedling box stacking device equipped with a means to prevent seedling box entry that solves the aforementioned conventional problems. Meanwhile, in order to move the seedling boxes discharged as described above to a designated location, workers have conventionally performed tasks such as moving the boxes one by one or manually stacking and moving multiple boxes; however, these methods had the problem of significantly reduced work efficiency. In order to solve the above-mentioned problems, a seedling box stacking device is provided to receive seedling boxes sown with soil and seeds via a conveyor and stack them, comprising: a stacking conveyor connected to the conveyor and having a plurality of conveyor rollers on its inner side; a cover connected to the lower part of the stacking conveyor and having a space formed therein; a motor provided on the inner side of the cover and supplying rotational force, having a first gear axially mounted at the front, and a second gear formed spaced apart from the first gear and having a diameter smaller than that of the first gear connected axially at the front of the first gear; a control unit connected to the motor and having a plurality of buttons on its front to control the rotational speed of the motor; a tension gear axially mounted on the cover and configured to slide vertically, having a first rotation gear provided at the front that receives rotational force from the first gear; and a first acceleration gear axially mounted on the stacking conveyor and receiving rotational force from the first tension gear at the front An accelerator gear is provided, having a roller made of synthetic resin material on its inner side to facilitate the transport of seedling boxes; a first driven accelerator gear and a second driven accelerator gear are provided, spaced apart from each other in the front and rear directions and receiving rotational force from the first accelerator gear, and a first driven gear is provided, having a roller made of synthetic resin material on its inner si