JP3973595B2 - Nursery box stacking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seedling box stacking apparatus that is used when, for example, seedling boxes that have been seeded are stacked in multiple stages for germination.
[0002]
[Prior art]
Conventionally, a nursery box that has been transported horizontally is lifted by a push-up plate driven by an air cylinder, and is stacked and sequentially stacked from below on a nursery box that is supported and supported by a locking claw that can be elastically retracted. When stacked and supported, it is held by a pair of chucks, lifted and conveyed, and stacked on multiple stages and on multiple blocks on a stand such as a pallet that is waiting It is known (see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-8-12081 ([0026] to [0032], FIGS. 6 to 8)
[0004]
[Problems to be solved by the invention]
According to the seedling box stacking device having the above-described configuration, a large number of seedling boxes can be efficiently stacked on the mounting table. However, if the mounting table is not efficiently supplied and carried out, the capacity of this device is fully demonstrated. It is something that cannot be made.
[0005]
The present invention has been made paying attention to such a point, and by devising the supply and carry-out structure of the mounting table, the ability of this kind of seedling box stacking apparatus can be sufficiently exhibited. This is the main purpose.
[0006]
[Means for Solving the Problems]
[0007]
The invention according to claim 1 holds a seedling box stacking mechanism that lifts the seedling boxes that have been placed and transported on the transport device by a lift mechanism and sequentially stacks them from below, and holds a predetermined number of stacked seedling box groups The loading / unloading mechanism that lifts the mechanism together and transports it onto the wheeled mounting table waiting at the predetermined nursery box loading position, and the loading table that has been loaded to the predetermined loading position. And a mounting table unloading mechanism for transferring to a transport cart waiting here,
A mounting table transport mechanism is provided for feeding the plurality of mounting tables stacked on the fixed support frame one by one from the lowest stage to the nursery box loading position, and for transporting the mounting table transport mechanism. The lower stage mounting table is locked by a locking part attached to the chain and transported along the support frame, and the wheels of the mounting table that are locked and removed from the support frame are transported in a box. A horizontally long rail member that is received and supported so as to be able to roll and move in a lateral direction orthogonal to the direction is horizontally mounted on the transport chain.
[0008]
According to the above configuration, the seedling boxes that have been brought to the stacking position of the seedling box stacking mechanism are lifted by the lift mechanism and stacked sequentially from below, and when the predetermined number of seedling boxes are stacked, the loading and transferring mechanism is activated. Then, the seedling box groups are lifted together by a gripping mechanism and stacked on a wheeled mounting table waiting at a predetermined seedling box loading position. The mounting table on which the seedling box group is mounted is transported to a predetermined transfer position by the mounting table unloading mechanism, and then transferred onto the transport cart and unloaded.
[0009]
Here, the mounting table with wheels is stacked and accommodated in multiple stages on a fixed support frame, and only the bottom stage mounting table is locked along the support frame by rotating the transport chain. It is unloaded and sent to the nursery box loading position. In this case, the wheel of the mounting table that is locked and conveyed by the conveyance chain slides on the support frame, and the wheel is received by the rail member that is horizontally mounted on the conveyance chain when the wheel is detached from the support frame. . And in a transfer position, a mounting base is pressed from a horizontal direction, a mounting base rolls along a rail member, is smoothly transferred on a conveyance trolley, and a predetermined number of mounting pedestals are on a conveyance trolley. When the transfer is completed, the transport cart is sent to a desired processing facility.
[0010]
Therefore, according to the first aspect of the present invention, supply of the mounting table for mounting the stacked seedling box groups is automatically performed, and the mounting table on which the seedling box groups are mounted is transferred to the transport carriage and carried out. As a result, the stacking operation and the carrying-out operation can be executed in a well-balanced manner, and the ability of this seedling seedling box stacking device can be fully exhibited.
[0011]
The invention according to claim 2 is the nursery box stacking device according to claim 1, wherein the pair of rail members before and after receiving the wheels provided at the front and rear of the mounting table are horizontally mounted on the transport chain. The locking portion is connected to the rail member at the rear in the transport direction.
[0012]
According to the above configuration, by changing the shape of the rail member that receives and supports the front and rear wheels in the mounting table, it is possible to form a locking unit for transporting the mounting table, and to form the bottom of the stacked mounting table group. A structure in which the mounting tables are taken out one by one in order from one to another and transported can be simplified.
[0013]
The invention according to claim 3 is the seedling box stacking device according to claim 1 or 2, wherein the transport cart is provided with a rail for receiving and guiding the mounting table, and is attached to the transport chain at the transfer position. A carriage lock mechanism is provided for positioning and fixing the carriage so that the rail of the carriage is connected to the rail member. Only when the carriage lock mechanism is in a locked state, the transfer operation of the mounting table unloading mechanism is allowed. It is configured.
[0014]
According to the above configuration, the transfer operation of the mounting table to the transfer carriage is not executed unless the transfer carriage is correctly positioned and locked at the transfer position.
[0015]
Therefore, according to the invention of claim 3, it is possible to reliably transfer the mounting table to the transport carriage, and the effect of the invention of claim 1 or 2 is promoted.
[0016]
The invention according to claim 4 is the seedling box stacking device according to claim 3, wherein wheel mounting members are mounted near both ends of the rail provided in the transport carriage, and the mounting table rolls on the transport carriage. When the wheel stop member is mounted in the wheel stop state at the entrance side of the mounting table while preventing the movement and switching the wheel stop member to the wheel stop release state to enable the mounting table to be taken in and out of the carriage. In addition, restraining means for disabling positioning and positioning of the transport table at the transfer position is provided at the transfer position.
[0017]
According to the above configuration, when the mounting table is placed on the transport carriage and moved, wheel stops are attached to both ends of the rail provided to the transport carriage so that the placement base placed during the movement is unreasonable. It is possible to prevent rolling movement. In addition, when the mounting table is transferred to an empty transport cart, if the wheel stopper member is still mounted on the entrance side of the mounting table, the transport cart cannot be correctly positioned at the transfer position. . For this reason, it becomes impossible to lock the carriage lock mechanism, and the loading operation of the mounting table is not performed.
[0018]
Therefore, according to the fourth aspect of the present invention, it is assumed that the transfer of the mounting table is executed only when the transport carriage is in the correct receiving state, and the operation is interrupted due to the occurrence of a transfer error. Therefore, transfer and unloading can be performed efficiently.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show the whole seedling box stacking apparatus. This seedling box stacking device is used in the process of stacking seedling boxes that have been sowed in multiple stages and sending them to a germination facility. A predetermined number of seedling boxes w are collectively lifted, and the loading / transferring mechanism 2 for stacking the waiting seedling boxes w on the mounting table T with wheels, and the mounting table T on which the seedling boxes w are stacked and placed on the transporting carriage D. A mounting table carry-out mechanism 3 to be transferred is provided.
[0020]
As shown in FIG. 3, the seedling box stacking mechanism 1 horizontally lifts the transporting device 4 that places the seedling box w and carries it in along the longitudinal direction of the box, and the seedling box w that has reached a predetermined stacking position. The lift mechanism 5 and a box support mechanism 6 that receives and supports the seedling box w lifted to a predetermined height from below are described below. The structure of each part will be described in detail below. In the following description, the long side direction of the seedling box w is referred to as the front-rear direction, and the short side direction is referred to as the left-right direction.
[0021]
As shown in FIGS. 5 and 6, the transport device 4 is configured to run a pair of left and right chains 8 driven by a motor 7 along the rails 9, and has been sent out from the end of the sowing line 10. The seedling box w that has been seeded is received and placed and sent to the stacking position. Before and after the stacking position and on the left and right sides, guide rods 11, 12, 13, and 14 made of bar material are arranged in a vertical posture and attached to the apparatus frame 15, and are stacked sequentially from below at the stacking position. A stacked path L that guides the multi-stage seedling box w from the front and rear and from the left and right is formed.
[0022]
Here, among the guide rods 11, 12, 13, and 14 that form the stacking path L, the lower end of the guide rod 12 that is a good transporter is set to a height that does not hinder the passage of the nursery box w to be carried in, The lower end of the lower guide rod 11 is set at a height that interferes with the box conveyance path so as to support the front end of the seedling box w that has been carried in, and the lower ends of the left and right guide rods 13 and 14 are slightly It is formed so as to spread downward, and can absorb a positional shift in the left-right direction at the time of carry-in. The front and rear guide rods 11 and 12 are fixed to a device frame 15 assembled in a bowl shape so that the front and rear positions can be adjusted, and the left guide rod 13 is also fixed to the device frame 15 so that the left and right positions can be adjusted. As shown in FIG. 7, only the right guy bar 14 is supported by the apparatus frame 15 so as to be slidable within a predetermined range from side to side via a support rod 14a, and is urged toward the stacking path L by a spring 16. Even if the width dimension of the seedling box w is slightly different, the difference is absorbed.
[0023]
A box arrival sensor 17 for detecting that the seedling box w has been carried into the stacking position is arranged below the stacking position, and the lift mechanism 5 is activated based on the detection of the box arrival. It has become. This box arrival sensor 17 is composed of a limit switch that is activated by contact with the bottom surface of the seedling box w that has been carried in, and is a box that is closer to the front of the left and right guide bars 13 and 14 than the front part in the transport direction. It is installed at a position off the lower side in the transport direction, and the seedling box w is carried in a state of being inclined in a flat posture, and the front end of the box is caught by one of the left and right guide bars 13, 14 and stopped. In such a case, the arrival of the box is not detected, and the situation where the lift mechanism 5 is unfairly activated without being properly loaded is avoided.
[0024]
As shown in FIGS. 6 and 8, a rubber saucer-shaped soil dropping member 28 is provided before and after the apparatus frame 15 so as to enter the stacked path, and the front wall of the seedling box w that is raised by the lift mechanism 5. And the earth dropping member 28 is slidably contacted with the rear wall, and it is comprised so that the mud and dirt adhering to here may be scraped off. In the sowing line, soil adheres not only to the front and rear walls of the seedling box w but also to the left and right side walls, but the soil on the left and right side walls can be easily removed with a brush or the like during transport to the stacking position. .
[0025]
The lift mechanism 5 is configured by providing a rotary lift member 18 on the left and right of the stacking position. The lift member 18 has a pair of front and rear arm members 20 fixed to a rotary support shaft 19 that is supported horizontally in the front-rear direction, and a scooping member 21 is installed and fixed horizontally across the tops of the front and rear arm members 20. The left and right lift members 18 are rotated by a constant pitch (120 ° pitch in this example) in synchronism with each other in opposite directions by a motor 22.
[0026]
Here, as shown in FIGS. 9 and 10, the scooping member 21 is configured as a hollow body that is lowered by a sheet metal press, and a small portion that contacts the bottom of the seedling box w at the tip portion in the rotation direction. A convex curved surface Sa having a curvature is provided, and a box sliding guide surface Sb is continuously provided over a predetermined length on the upper side in the rotational direction of the convex curved surface Sa. The box sliding guide surface Sb is formed as a convex curved surface having a large curvature that is continuous with the convex curved surface Sa having a small curvature, so that the entire box sliding guide surface Sb is gradually with respect to the maximum rotation locus A of the lift member 18. It is set to move backward to the center of rotation.
[0027]
The box support mechanism 6 is arranged on the left and right sides of the lower part of the stacking path L at a position separated from the front and rear of the lift member 18, and the swing arm 23 in the standing posture is set from the height of the seedling box carrying in. A structure in which a taper-shaped locking claw 24 protruding toward the stacking path L side is attached to the upper end of the swing arm 23 while being supported so as to be capable of swinging horizontally around the lower horizontal fulcrum a. It has become. The locking claw 24 is bolted to the swing arm 23 so that the position of the locking claw 24 can be adjusted in the front-rear direction and the up-down direction, and has an appropriate width in the front-rear direction. The guide surface s1 is inclined at 45 ° and the upper surface of the locking claw 24 is formed as a horizontal box locking surface s2.
[0028]
A spring 25 is installed over the lower extension end of the swing arm 23 and the device frame 15, and the upper end side of the swing arm 23 is swingingly biased so as to enter the stacking path L side. The lower end of the swing arm 23 is in contact with the contact bolt 26 provided on the device frame 15, so that the bias swing limit of the swing arm 23 is restricted. Then, by adjusting the contact bolt 26 forward and backward, it is possible to adjust the limit position of entry of the locking claw 24 attached to the upper end of the arm into the stacking path L side.
[0029]
The seedling box stacking mechanism 1 is configured as described above. Next, the stacking operation will be described in the order of strokes based on FIGS.
[0030]
(1) As shown in FIG. 12, when the first seedling box w is brought into the stacking position in a state where the seedling box w is not supported by the box support mechanism 6, it is supported by contact with the front guide member 11 And positioning in the front-rear direction is performed. At this time, the lift member 18 in the lift mechanism 5 stands by at a position where one scooping member 21 enters the lower left and right of the box moving path.
[0031]
(2) As shown in FIG. 13, when the box arrival sensor 17 senses and confirms that the box is brought into the stacking position, the motor 22 is activated, and the left and right lift members 18 are driven to rotate in synchronization with each other in opposite directions. The nursery box w in the stacked position is lifted horizontally so that it can be scooped up by the scooping member 21 in the left and right lift members 18.
[0032]
(3) When the seedling box w is lifted, the outer edge of the upper left and right sides of the seedling box w is set at the diagonally downward guide surface S1 of the left and right engaging claws 24 in the box support mechanism 6 waiting at the position where it has entered the stacking path L. The abutment presses and the outer edge of the seedling box w rises while slidingly contacting the guide surface S1 of the latching claw 24, so that the latching claw 24 moves backward laterally against the spring 25.
[0033]
(4) When the raised seedling box w passes through the locking claw 24, the locking claw 24 moves back to the stacking path L side together with the swing arm 23, as shown in FIG. It goes under the box w. Thereafter, the lift member 18 is further rotated and detached from the seedling box w, and the seedling box w released from the support by the lift member 18 is received and supported by the box locking surfaces s2 of the left and right locking claws 24.
[0034]
In this case, in the stacking operation, the rotating left and right scooping members 21 smoothly scoop up the seedling box w at the tip portion formed on the convex curved surface Sa with a small curvature and lift it to the highest position, and then the bottom surface of the seedling box w The latching claw where the corner portion rides on the sliding guide surface Sb and the nursery box w slides relatively along the sliding guide surface Sb as the scooping member 21 continues to rotate and returns to the stacking diameter L road side. It is received and supported by 24 box locking surfaces s2 with little impact.
[0035]
(5) The next box is carried in while the seedling box w is being lifted. When the lift member 18 is rotated by one pitch (120 °), it is temporarily stopped, and the next seedling box w is carried into the stacking position. If confirmed, the lift member 18 is rotated again and the next box lifting operation is performed as described above.
[0036]
(6) In lifting the second and subsequent boxes, as shown in FIG. 15, the locking claw 24 that receives and supports the upper nursery box w is moved backward as the lower nursery box w is lifted. The lower nursery box w is stacked under the upper nursery box w.
[0037]
Here, as shown in FIG. 11, vertical ribs 27 are formed on the outer surface of the seedling box w for reinforcement, and the locking claws 24 are positioned on the swing arm 23 so as to face the vertical ribs 27. Installed. Therefore, as shown in FIG. 16, even if the latching claw 24 comes off the bottom of the upper nursery box w, the latching claw 24 acts on the vertical rib 27 so that the upper nursery box w is immediately dropped. In other words, as the locking claw 24 moves backward, the interval between the upper and lower seedling box w gradually decreases and stacks without impact.
[0038]
(8) Thereafter, by sequentially performing the above operations, a large number (10 in this example) of seedling boxes w can be stacked sequentially from below, and the predetermined number of stacked seedling boxes w are loaded and transferred. It is carried out by the loading mechanism 2.
[0039]
As shown in FIGS. 7 to 25, the loading / transferring mechanism 2 includes a gripping mechanism 31 that lifts together a predetermined number of seedling boxes w stacked by the seedling box stacking mechanism 1, and the gripping mechanism 31 at a stacking position. And a loading / conveying mechanism 32 that reciprocally moves left and right between the loading positions separated from the lateral sides thereof. The structure of each part will be described in detail below. In this description as well, the long side direction of the seedling box w is referred to as the front-rear direction and the short side direction is referred to as the left-right direction as in the previous description.
[0040]
The loading / conveying mechanism 32 is provided on a pair of long front and rear rails 33 attached to the upper end of the apparatus frame 15, a conveyance frame 34 mounted so as to be able to travel left and right along the rails 33, and an upper part of the apparatus frame 15. The conveyor belt frame driving motor 35 is connected to the belt 36 by rotating the belt 36 wound in parallel with one rail 33 in the forward and reverse directions by the motor 35. The conveyance frame 34 is reciprocated left and right.
[0041]
A pair of front and rear bosses 37 are provided on the transport frame 34, and an elevating frame 39 is connected to the lower ends of a pair of guide shafts 38 that are slidably inserted into the bosses 37. The elevating frame 39 is suspended and connected to a chain 41 wound around a large-diameter sprocket 40 arranged on the transport frame 34, and the elevating frame 39 is moved forward and backward by a motor 42. The guide is lifted and lowered in parallel with a large stroke. The elevating frame 39 is also provided with a pair of front and rear bosses 43, which are slidably inserted vertically into the bosses 43 within a certain small range, and at the lower end of the guide shaft 44 prevented from dropping by the stopper 44 a, the gripping mechanism 31. Are connected.
[0042]
The gripping mechanism 31 includes a support frame 51 connected to the lower end of the guide shaft 44, a support arm 52 extending downward from the front and rear ends of the support frame 51, and front and rear attached to the left and right sides of the support arm 52. It is composed of a pair of gripping arms 53 and the like, and is attached to the lower ends of the front and rear gripping arms 53 in a state where the stacked seedling box w group is housed between the front and rear support arms 52 and projects inwardly. Then, the seedling box group W is received and supported by the support claws 54 from below.
[0043]
The front and rear support arms 52 function as box support members that support the stacked seedling box groups W from the front and rear, and are configured to be wide in the lateral direction.
[0044]
The grip arm 53 is connected and fixed to a support shaft 55 that is pivotally inserted in the upper part of the support arm 52 around a horizontal fulcrum b, and an operation arm portion 53 a extends upward from the grip arm 53. . The operation arm portion 53a is linked to both ends of a drive arm 56 disposed on the support frame 51 via a rod 57, and is gripped by rotating the drive arm 56 forward and backward with an air cylinder 58. The arm 53 is opened and closed back and forth, and the support claw 54 is driven out and back.
[0045]
The front and rear support arms 52 are provided with a pair of left and right long alignment members 60 supported by a pair of upper and lower parallel quadruple links 59, and the parallel quadruple links 59 are driven by the air cylinder 61. Thus, the alignment member 60 is configured to open and close in parallel over an action position where the corner of the seedling box group W is pressed and a retreat position away from the corner of the seedling box group W upward. Has been.
[0046]
The loading / transferring mechanism 2 is configured as described above. Next, the loading operation will be described in the order of strokes.
[0047]
(1) While the seedling box stacking process is being performed by the seedling box stacking mechanism 1, the transport frame 34 is positioned above the seedling box stacking mechanism 1, and the gripping mechanism 31 is predetermined with the support claws 54 open. It is lowered to the height of and is waiting. At this time, the support claw 54 is at a height position where it can enter the lower part of the seedling box w at the lowest stage.
[0048]
(2) When the counting means confirms that the predetermined number of sheets (10 sheets in this example) has been stacked, the gripping arm 53 that has been swinging open is closed and swings, The support claw 54 is inserted.
[0049]
(3) Next, the elevating frame 39 is driven up, and the gripping mechanism 31 that grips the seedling box group W is raised above the seedling box stacking mechanism 1. In this case, the tip end portion of the extending arm 51a of the support frame 51 in the gripping mechanism 31 is supported by being attached to the lower ends of the four receiving members 45 provided on the movable base frame 34 via the contact rubber 46. Thus, the gripping mechanism 31 is stably held without shaking (see FIGS. 20 and 21).
[0050]
(4) When the seedling box group W is lifted, the movable frame 34 travels to the loading position P1 and stops, and the gripping mechanism 31 is lowered.
[0051]
(5) A loading table (Minitrokko) T with wheels is waiting in advance at the loading position P1, and the seedling box group W gripped by the gripping mechanism 31 is placed on the mounting table T. In this case, the positioning member 60 is first retracted outwardly near the mounting table T. Then, even if the seedling box group W is placed on the mounting table T, the lowering of the lifting frame 39 is still continued, and the supporting frame 51 that cannot be lowered due to the contact of the support claws 54 with the mounting table T is prevented. As a result, the lifting frame 39 is lowered.
[0052]
Here, a detection piece 63 made of an iron plate is erected on the support frame 51, and a proximity switch 64 (see FIG. 22) for the detection piece 63 is provided on the lifting frame 39. When the lift frame 39 approaches and descends and the distance between the frames 51 and 39 approaches the set value or less, the proximity switch 64 detects the detection piece 63, thereby detecting the landing of the seedling box group W and the lift frame The descent of 39 is stopped.
[0053]
(6) Next, the gripping arm 53 is driven to open, and the support claw 54 at the lower end is extracted from between the seedling box group W and the mounting table T, and the seedling box group W is transferred onto the mounting table T. The In this case, the drag movement of the seedling box w accompanying the extraction of the support claws 54 is received and prevented by the wide support arm 53, and the seedling box group W is loaded on the mounting table T while maintaining a predetermined stacked state.
[0054]
(7) When the loading of the seedling box group W onto the mounting table T is completed, the gripping mechanism 31 is raised to above the transferred seedling box group W and moved back to the origin position above the stacking position. The gripping mechanism 31 is lowered to the initial lifting height, and this completes one loading / transferring process.
[0055]
(8) In this example, 10 sheets are loaded three times, and 30 seedling boxes w are conveniently loaded on the mounting table T. In addition, in the second and third loading, by applying the alignment member 60 in the closed posture to the corner of the seedling box group W loaded first, The third-stage seedling box group W can be stacked on the lower seedling box group W in an orderly manner without misalignment. Also, in the second and third loadings, the raising frame 39 can be accommodated after the raising group W held by the holding mechanism 31 is placed on the lower raising group W 1 and cannot be lowered. As described above, the proximity switch 64 detects that the set amount is further lowered in the range, thereby detecting the landing of the seedling box group W 1 and stopping the lowering of the lifting frame 39, and the next operation is started. .
[0056]
(9) When loading of the three-stage (30 sheets) seedling box onto the mounting table T is completed, the full loading table T is transferred to the transporting cart D by the mounting table unloading mechanism 3, and two units are transferred to the transporting cart D. Is transferred to the germination facility by manual movement.
[0057]
Next, the structure and function of the mounting table carry-out mechanism 3 will be described.
[0058]
The mounting table unloading mechanism 3 includes a mounting table supply unit 70 that stacks and stores mounting tables T that are large enough to mount one seedling box, and the mounting tables T that are stacked and stored one by one from the bottom. The loading table transport mechanism 71 that transports the loaded loading table T to the next transfer position P2 and the loading table T transferred to the transfer position P2 are transferred. An extrusion mechanism 72 that pushes out and transfers onto the transport carriage D that is waiting beside the path is provided.
[0059]
As shown in FIG. 26, the mounting table T with wheels used here is configured in an inward-facing frame shape with a size that allows only one seedling box w to be mounted. A small-diameter wheel 73 for rolling in the short side direction (lateral direction) of the seedling box w is provided so as to be freely rotatable.
[0060]
As shown in FIGS. 2, 30, and 31, in the mounting table supply unit 70, four guide frames 74 are erected so as to guide and stack and store the four corners of the plurality of mounting tables T. A pair of left and right support frames 75 that receive and support the wheels 73 of the lowermost mounting table T are provided below the guide frame 74.
[0061]
The mounting table transport mechanism 71 is configured by horizontally winding and stretching a pair of left and right transport chains 77 that are driven to rotate by a motor 76 from the lower part of the mounting table supply unit 70 to the front part of the pushing mechanism 72. A plurality of pairs of a pair of front and rear rail members 78 and 79 are installed at a predetermined pitch across the left and right transport chains 77 at the same front-rear distance as the distance between the front-rear wheels 73 on one mounting table T.
[0062]
Each of the pair of rail members 78 and 79 is formed in a groove shape so as to engage and guide the wheel 73 of the mounting table T so as to be able to roll and move in the lateral direction, and from the rear end of the rear rail member 79. A locking portion 80 is provided extending to lock and press the lowermost mounting table T mounted and supported on the support frame 75 from the rear.
[0063]
Accordingly, when the transport chain 77 is rotationally driven, the front and rear rail members 78 and 79 enter under the mounting table supply unit 70, and when the front and rear rail members 78 and 79 reach under the wheel 73 of the mounting table T. The locking portion 80 starts to press the mounting table T from the rear, and only one mounting table T is pressed and moved forward with the rotation of the transport chain 77, so that the wheels 73 in the lateral posture are supported by the support frame 75. Move forward while sliding on the top.
[0064]
Then, when the front wheel 73 passes over the support frame 75, as shown in FIG. 30, the front wheel member 73 falls into the front rail member 78, and the mounting table T continues to be locked and moved in a slightly inclined posture. Thereafter, when the rear wheel 73 passes over the support frame 75, it falls into the rear rail member 79, and the mounting table T received and supported by the front and rear rail members 78, 79 again becomes a flat posture and is placed and conveyed forward. Go.
[0065]
When the lowermost stage T is unloaded, the subsequent stage T is lowered by its own weight while being guided by the support frame 75, and is prepared for unloading by the next set of rail members 78 and 79. In addition, the mounting table T is guided from the left and right so that the mounting table T is prevented from rolling to the left and right on the rail members 78 and 79 by being locked and transferred to the left and right of the mounting table transport mechanism 71. A rod-shaped conveyance guide 81 is provided.
[0066]
When it is detected by the proximity of the detection piece 65 provided in the conveyance chain 77 and the proximity switch 66 that the unloaded mounting table T has reached the loading position P1, the conveyance is stopped. The nursery box is loaded three times on the mounting table T by the transfer mechanism 2, and 30 nursery boxes w are loaded for convenience. Then, when the seedling box loading on the mounting table T is completed, the transportation of the mounting table T is resumed, and the full loading table T is transported from the loading position to the next transfer position, and from the mounting table supply unit 70. The removed empty mounting table T is transported toward the loading position. Here, the arrangement pitch of the rail members 78 and 79 and the distance between the loading position P1 and the transfer position P2 are set to be the same, and when the empty mounting table T reaches the loading position P1 and the conveyance stops, The full loading table T stops just at the transfer position P2, the next loading is performed at the loading position P1, and the transfer mechanism P moves the loading table T to the transport carriage D at the loading position P2. The loading operation is performed.
[0067]
As shown in FIGS. 27, 28, and 29, the transport carriage D used here has wheels 83, casters fixed to a frame 82 that is large enough to place two mounting tables T side by side. 84 and a handle 85, and a pair of front and rear rails 86 for rolling and guiding the wheels 73 of the mounting table T that have been pushed sideways are provided on the upper surface of the frame 82. .
[0068]
As shown in FIG. 33, the push-out mechanism 72 is provided with a pusher 88 that is screwed forward and backward by a motor 87 to the left and right, and the mounting table T that has been transferred to the transfer position P2 is placed on the transfer carriage D. Are sequentially extruded and transferred. In addition, a relay stand 89 is provided at the laterally outer side of the transfer position P2 in the mounting table transport mechanism 71, and the rail members 78 and 79 before and after the mounting table transport mechanism 71 are arranged on the upper surface of the relay table frame 89. A pair of front and rear relay rails 90 that connect the front and rear rails 86 of the transport carriage D are provided. As shown in FIGS. 33 and 38, a low ridge 90a is provided on the entrance side of the relay rail 90, and the mounting table T transported to the transfer position P2 is not prepared on the relay table 89 side. To stop moving to.
[0069]
The transport carriage D needs to be prevented from moving back and forth and right and left while being correctly positioned at the transfer / unloading position. Therefore, the relay carriage frame 89 is provided with the following positioning means and a carriage lock machine 91 as follows. Yes.
[0070]
As shown in FIGS. 33, 34, and 35, the relay frame 89 is provided with an operation shaft 92 that can be rotated around a longitudinal axis c, and the operation shaft 92 has a pair of front and rear locks. A claw 93 is fixed, and a handle 92a connected to one end of the operation shaft 92 is rotated to rotate the operation shaft 92, and the lock claw 93 is locked to the lower side frame portion 82a of the frame 82 in the transport carriage D. Can be fixed in the left-right direction.
[0071]
The relay frame 89 is provided with a guide plate 94 for engaging and positioning the corner support frame 82b of the transport carriage D from the front direction, and the operation shaft 92 is rotated to the locking position. In this state, the engagement piece 95 that engages with the front end of the transport carriage D is fixed, and the lock pawl 93 is set to the lock operation position in a state where the transport carriage D is engaged with the guide plate 94 and set at the correct position. Since the engagement piece 95 is engaged with the front end of the transport carriage D when it is rotated, the carriage lock mechanism 91 is configured so that the transport carriage D is fixed so as not to move forward and backward and left and right. is there.
[0072]
Further, a limit switch 96 for detecting that the lock claw 93 has been rotated to the lock operating position is provided on the relay base frame 89. If the limit switch 96 is not detected to be locked, the pusher The extrusion transfer operation by 88 is not executed.
[0073]
In addition, slits 97 are formed at the left and right ends of the rail 86 provided in the transport carriage D, and by inserting a wheel stopper member 98 made of a plate material into the rail 86, two units transferred on the rail are mounted. It is possible to prevent the stage T from moving left and right.
[0074]
Then, it is necessary to attach the wheel stopper member 98 only to the lower side of the push-in on the rail 86 of the transport carriage D to be loaded at the transfer / unload position, and to remove the wheel stopper member 98 with the rail entrance. In this case, if the transfer operation of the mounting table T is executed in a state where the rail entrance has forgotten to remove the waving wheel stopper member 98, it causes a big trouble. Means is provided for preventing the forgoing transport carriage D from being loaded into the predetermined transfer position P2.
[0075]
That is, as shown in FIG. 38, a check bracket 99 protruding laterally outward is provided near the outer ends of the front and rear relay rails 90 in the relay stand 89. When the transport carriage D for which the member 98 has been forgotten to be removed is carried in, the check metal fitting 99 and the wheel stopper member 98 forgotten to be removed may interfere with contact, and the transport carriage D cannot be brought closer to the relay frame 89. The lock operation cannot be performed. As shown in FIG. 33, only when the rail entrance is removed from the front and rear wheel stopper members 98, the transport carriage D can be positioned close to the relay frame 89 and locked. It is.
[0076]
As shown in FIG. 36, when the two mounting tables T are sequentially pushed into the transfer carriage D that is correctly positioned and locked at the transfer / unloading position as described above, the front and rear rails of the transfer carriage D are transferred. 86 is fitted with a wheel stop member 98 to prevent the mounting table T from moving left and right on the carriage, and then the lock claw 93 and the engagement piece 95 are released to carry the transport carriage D forward. They are then brought into the budding facility.
[0077]
[Another embodiment]
(1) The wheel stop member 98 can be always provided at both ends of the rail 90 so as to be able to switch back and forth.
[Brief description of the drawings]
[Fig. 1] Overall plan view of a seedling box stacking device
FIG. 2 is a side view of the seedling box stacking device as viewed from the carry-out side.
[Fig. 3] Whole front view of nursery box stacking device
FIG. 4 is a perspective view showing the flow of a seedling box.
[Fig. 5] Plan view of the seedling box stacking mechanism
[Fig. 6] Side view of seedling box stacking mechanism
FIG. 7 is a front view of a nursery box stacking mechanism.
FIG. 8 is a side view (b) and a plan view (b) showing the soil removal means of the seedling box stacking mechanism.
FIG. 9 is a front view of a lift member.
FIG. 10 is a side view of a lift member.
FIG. 11 is a perspective view of a nursery box
FIG. 12 is a front view showing the stacking operation of the seedling box stacking mechanism.
FIG. 13 is a front view showing the stacking operation of the seedling box stacking mechanism.
FIG. 14 is a front view showing the stacking operation of the seedling box stacking mechanism.
FIG. 15 is a front view showing the stacking operation of the seedling box stacking mechanism.
FIG. 16 is a front view showing the main part of the stacking operation.
FIG. 17 is a side view of the loading and conveying mechanism.
FIG. 18 is a side view showing a loading and conveying mechanism in a state where a nursery box is gripped.
FIG. 19 is a front view of the loading and conveying mechanism.
FIG. 20 is a front view showing a loading and conveying mechanism in a state where a nursery box is gripped.
FIG. 21 is a plan view showing the main part of the loading and conveying mechanism.
FIG. 22 is a side view showing the loading and conveying mechanism in the seedling box loading operation state.
FIG. 23 is a side view showing a nursery box gripping portion of the loading and conveying mechanism.
FIG. 24 is a front view showing a nursery box gripping portion of the loading and conveying mechanism.
FIG. 25 is a cross-sectional plan view showing the nursery box gripping portion of the loading and conveying mechanism.
FIG. 26 is a plan view (A), a side view (B), and a partial cross-sectional view (C) of the mounting table.
FIG. 27 is a side view of the transport carriage.
FIG. 28 is a front view of a transport cart
FIG. 29 is a plan view of a transport cart
FIG. 30 is a side view showing the supply operation of the mounting table supply unit.
FIG. 31 is a front view showing the main part of the mounting table supply unit.
FIG. 32 is a front view of the mounting table transport mechanism.
FIG. 33 is a plan view of a transfer position in the mounting table carry-out mechanism.
FIG. 34 is a front view of the transfer position in the mounting table carry-out mechanism.
FIG. 35 is a front view showing a transfer operation state in the mounting table carry-out mechanism.
FIG. 36 is a front view of a transport carriage to which the mounting table is transferred.
FIG. 37 is a plan view of the carriage lock mechanism in the transfer position.
FIG. 38 is a perspective view of the restraining means provided at the transfer position.
[Explanation of symbols]
1 Nursery box stacking mechanism
2 Loading and transferring mechanism
3. Mounting table unloading mechanism
4 Transport mechanism
5 Lift mechanism
31 Grip mechanism
71 Mounting table transport mechanism
73 wheels
75 Support frame
77 Conveyor chain
78 Rail member
79 Rail member
80 Locking part
86 rails
91 Bogie lock mechanism
98 Wheel stopper
w Nursery box
T mounting table
D Transport cart

Claims (4)

A seedling box stacking mechanism that lifts the seedling boxes that have been placed and transported on the transport device by a lift mechanism and stacks them sequentially from below, and a predetermined number of seedling boxes that are stacked together are lifted together by a gripping mechanism, A loading / unloading mechanism that transports and transfers onto a wheeled mounting table that is waiting at the nursery box loading position, and transports the loading table that has been loaded to a predetermined transfer position and waits here. A mounting table unloading mechanism for transferring onto the transporting carriage,
A mounting table transport mechanism is provided for feeding the plurality of mounting tables stacked on the fixed support frame one by one from the lowest stage to the nursery box loading position, and for transporting the mounting table transport mechanism. The lower stage mounting table is locked by a locking part attached to the chain and transported along the support frame, and the wheels of the mounting table that are locked and removed from the support frame are transported in a box. A nursery box stacking apparatus, characterized in that a horizontally long rail member that is received and supported so as to be able to roll and move in a lateral direction perpendicular to the direction is horizontally mounted on the transport chain. The nursery box stacking device according to claim 1,
A seedling box in which a pair of front and rear rail members for receiving the wheels provided on the front and rear sides of the mounting table are horizontally mounted on the transport chain, and the locking portions are connected to the rail members at the rear in the transport direction. Stacking device. The seedling box stacking device according to claim 1 or 2,
The carriage includes a rail for receiving and guiding the mounting table, and a carriage lock mechanism for positioning and fixing the carriage so that the rail of the carriage is connected to a rail member attached to the conveyance chain at the transfer position. The seedling box stacking device configured to allow the transfer operation of the mounting table carry-out mechanism described above only when the carriage locking mechanism is in a locked state. The seedling box stacking device according to claim 3,
Wearing wheel stop members near both ends of the rail provided in the transport carriage to prevent rolling movement of the mounting table on the transport carriage, switching the wheel stop member to a wheel stop release state, and to the transport carriage When the wheel stopper member is mounted in the wheel stop state on the entrance side of the mounting table, the check means for disabling the positioning of the transfer carriage at the transfer position is provided. A nursery box stacking device deployed at the mounting position.

Images