JP4861488B2 - Nursery box conveyor - Google Patents

Description

  In the present invention, a plurality of endless conveyor belts are supported by a conveyor frame so as to be driven and rotated in a direction orthogonal to the nursery box transport direction, and a seedling box is supported by the plurality of endless conveyor belts. The present invention relates to a nursery box conveyor that receives and conveys from below.

  Conventionally, for example, Patent Document 1 discloses a seedling box conveyor as described above. In the device described in Patent Document 1, pulleys are provided on both ends of the drive shaft and the front and rear rotation shafts supported by the main frame (corresponding to the conveyor frame), and a belt is provided between the drive shaft and the pulleys on both ends of the front and rear drive shafts. (Equivalent to an endless conveyor belt) is wound, the belt is driven by the driving force from the motor, and the seedling box placed on the belt is conveyed.

JP 2002-233249 A (paragraph [0011], FIGS. 3, 4 and 5)

  In the nursery box conveyor described above, if the forward path side of the endless conveyor belt may hang down due to the load of the nursery box, the transfer of the nursery box is likely to be hindered. In addition, problems such as tilting of the seedling box and the movement of the floor soil material in the seedling box tend to occur.

  An object of the present invention is to provide a nursery box conveyor that can prevent the endless conveyor belt from drooping at low cost and can exhibit excellent durability.

According to the first aspect of the present invention, a plurality of endless conveyor belts are lined up at a predetermined interval in a direction orthogonal to the nursery box transport direction and supported by a conveyor frame so as to be freely rotatable. In the seedling box conveyor that receives and conveys boxes from below,
The forward path of the plurality of endless conveyor belts between a start side support shaft wound around the transport start end side of the plurality of endless conveyor belts and a terminal end support shaft wound around the transport end side of the plurality of endless conveyor belts Support means for receiving and supporting the side from below is supported on the conveyor frame along a direction orthogonal to the nursery box transport direction, and is rotatably fitted around the support shaft and rotated around the support shaft. A cylindrical body that receives and acts on the plurality of endless conveyor belts while being freely supported,
The cylindrical body is configured to be externally fitted to the support shaft in a state where the inner peripheral surface of the cylindrical body is in direct contact with the outer peripheral surface of the support shaft ,
The axial center of the cylindrical body is deviated from the axial center of the support shaft in a state in which the outer peripheral surface of the support shaft and the inner peripheral surface of the cylindrical body are in point contact with each other as viewed along the axial center of the support shaft. It is .

According to the configuration of the first aspect of the invention, the cylinder is rotated by the rotational force applied by the contact with the forward path side of each endless conveyor belt, and receives and acts on the forward path side of each endless conveyor belt. The endless conveyor belt and the cylindrical body are less likely to wear due to body contact, while the forward side of each endless conveyor belt is supported by the support shaft via the cylindrical body, and the nursery box on the forward side of each endless conveyor belt It is possible to prevent sagging due to the load. A simple structure in which the support shaft is fixed to the conveyor frame and the cylindrical body is directly fitted onto the support shaft can be achieved.
Therefore, while fixing the support shaft to the conveyor frame and making the structure simple by simply fitting the cylinder body directly to the support shaft, the endless conveyor belt is prevented from sagging on the forward path side, and the nursery box is inclined. A high-quality nursery box conveyor that is durable and can be used over a long period of time, while being able to smoothly transport the endless conveyor belt and cylindrical body without being subject to posture changes. Can do.
According to the configuration of the first aspect of the invention, the rotational resistance of the cylindrical body generated by the contact between the cylindrical body and the support shaft is suppressed as much as possible, and the rotation of the cylindrical body due to the contact with the endless conveyor belt is smoothly generated, thereby the endless conveyor belt. In addition, wear of the cylindrical body can be made less likely to occur.
Therefore, it is possible to obtain a nursery box conveyor having excellent durability so that the specification life of the endless conveyor belt and the cylindrical body can be extended and used for a longer period of time.

In the second aspect of the invention, the cylindrical body is sandwiched between a pair of main frames provided in a posture along the nursery box transport direction at both ends of the conveyor frame in a direction orthogonal to the nursery box transport direction. It is comprised so that it may be located in the receiving action position with respect to the said several endless conveyor belt.

According to the third aspect of the present invention, a plurality of endless conveyor belts are lined up at a predetermined interval in a direction orthogonal to the nursery box transport direction and supported by a conveyor frame so as to be able to be driven to rotate. In the seedling box conveyor that receives and conveys boxes from below,
The forward path of the plurality of endless conveyor belts between a start side support shaft wound around the transport start end side of the plurality of endless conveyor belts and a terminal end support shaft wound around the transport end side of the plurality of endless conveyor belts Supporting means for receiving and supporting the side from below, a support shaft fixed to the conveyor frame along a direction orthogonal to the nursery box transfer direction, and a line along the axis of the support shaft aligned with the support shaft. A plurality of cylindrical bodies that are externally fitted rotatably and supported by the support shafts while being rotatably supported by the plurality of endless conveyor belts;
The plurality of cylindrical bodies are configured to be externally fitted to the support shaft in a state where the inner peripheral surface of the cylindrical body is in direct contact with the outer peripheral surface of the support shaft ,
The shafts of the plurality of cylindrical bodies are in contact with each other in a state in which the outer peripheral surface of the support shaft and the inner peripheral surfaces of the plurality of cylindrical bodies are in point contact with each other as viewed along the axis of the support shaft. It is biased with respect to the shaft core .

According to the configuration of the third aspect of the invention, in each of a plurality of endless conveyor belts, the cylinder is rotated by the rotational force applied by contact with the forward path side of the endless conveyor belt and is received on the forward path side of the endless conveyor belt. The endless conveyor belt and the cylindrical body are less likely to wear due to contact between the endless conveyor belt and the cylindrical body. It is possible to prevent sagging caused by the load of the nursery box in The cylindrical body is made into a short cylindrical body sufficient to receive only the corresponding endless conveyor belt of the plurality of endless conveyor belts, and the rotational resistance of the cylindrical body generated by the contact between the cylindrical body and the spindle is minimized. It is possible to suppress the rotation of the cylindrical body due to contact with the endless conveyor belt smoothly, thereby making it more difficult to wear the endless conveyor belt and the cylindrical body. A simple structure in which the supporting shaft is fixed to the conveyor frame and each cylindrical body is directly fitted onto the supporting shaft can be achieved.

According to the configuration of the third aspect of the present invention, when wear occurs due to contact with an endless conveyor belt in a part of the cylinders, the cylinders that are not worn are left and only the worn cylinders are replaced. The means can be restored to a predetermined working state.

Therefore, the support shaft is fixed to the conveyor frame and each cylinder is directly fitted on the support shaft. A high-quality nursery box conveyor with excellent durability so that the endless conveyor belt and the cylindrical body can be used for a long period of time without being worn out can be smoothly transported in a state where the posture change is unlikely to occur. be able to.
Further, even if wear occurs in some of the cylinders, it is possible to restore the support means to a predetermined operating state at low cost by exchanging only the worn cylinders.

According to the configuration of the third invention, the rotational resistance of the cylindrical body generated by the contact between the cylindrical body and the support shaft is suppressed as much as possible, and the rotation of the cylindrical body due to the contact with the endless conveyor belt is smoothly generated, thereby the endless conveyor belt. In addition, wear of the cylindrical body can be made less likely to occur.
Therefore, it is possible to obtain a nursery box conveyor having excellent durability so that the specification life of the endless conveyor belt and the cylindrical body can be extended and used for a longer period of time.

In the fourth aspect of the present invention, the outer end of the plurality of endless conveyor belts is positioned between the pair of cylindrical bodies that receive and act on the pair of adjacent endless conveyor belts, and is externally fitted to the support shaft. A positioning cylindrical body that abuts against the end surfaces of the pair of cylindrical bodies so as to position the pair of cylindrical bodies at the receiving operation position with respect to the endless conveyor belt is provided, and in a direction along the support shafts of the plurality of cylindrical bodies. Is configured to prevent misalignment.

In the fifth aspect of the invention, the positioning cylindrical body is configured to have a longer length in the direction orthogonal to the nursery box transport direction than the pair of cylindrical bodies.

In the sixth aspect of the present invention, the outer end of the plurality of endless conveyor belts is positioned between the pair of cylindrical bodies that receive and act on the pair of adjacent endless conveyor belts, and is externally fitted to the support shaft. A positioning cylinder that contacts the end surfaces of the pair of cylinders so as to position the pair of cylinders at a receiving position for the endless conveyor belt;
The pair of cylindrical bodies is replaced with the cylindrical body as a receiving means for replacing the cylindrical body so that the pair of cylindrical bodies can be mounted on the support shaft instead of the positioning cylindrical body as positioning means for replacing the positioning cylindrical body. Thus, the specifications of the pair of cylindrical bodies and the specifications of the positioning cylinders are set to be the same so that they can be mounted on the spindle.

According to the configuration of the sixth aspect of the present invention, when the cylindrical body is worn away by contact with the endless conveyor belt, the forward path side of the endless conveyor belt can be supported by the positioning cylinder instead of the cylindrical body.
In other words, when wear occurs due to contact with the endless conveyor belt in the cylinder, this cylinder is replaced with the positioning cylinder between the cylinders where the positioning cylinder has been positioned so far and is positioned on the support shaft. The mounting and positioning cylindrical body is mounted on the support shaft by replacing the cylindrical body at the position where the cylindrical body has been positioned until then. Then, the positioning cylinder is positioned so as to receive and act on the forward path side of the endless conveyor belt, and is positioned at this position by the cylinder.

  Therefore, even if wear occurs due to contact with the endless conveyor belt in the cylinder, the positioning cylinder can be used to receive the endless conveyor belt on the forward side, and a new cylinder is required. However, it is possible to obtain an excellent nursery box conveyor that can be used at low cost over a long period as a whole.

In the seventh aspect of the invention, one of the pair of main frames provided at both ends of the conveyor frame in a direction orthogonal to the nursery box transport direction in a posture along the nursery box transport direction is fitted on the main shaft and the support shaft. The cylindrical body on one main frame side is sandwiched between the positioning plate thus formed, and the cylindrical body on the other main frame side is sandwiched between the other main frame and the positioning plate externally fitted to the support shaft, thereby The plurality of cylindrical bodies are configured to be positioned separately at the receiving action positions with respect to the plurality of endless conveyor belts.

In the eighth aspect of the invention, the portion of the cylindrical body that receives the forward path side of the endless conveyor belt is biased toward one end of the cylindrical body with respect to the central portion in the axial direction of the cylindrical body.
According to the structure of this 8th invention, even if abrasion by contact with an endless conveyor belt generate | occur | produces in the location which receives an endless conveyor belt of a cylindrical body, this cylindrical body can be used again.
In other words, by appropriately setting the distance that the location where the cylindrical endless conveyor belt is received deviates from the center in the axial direction of the cylindrical body, the location where the cylindrical endless conveyor belt is received is connected to the endless conveyor belt. If wear due to contact occurs, change the mounting direction of the cylinder to the spindle so that one end of the cylinder located on the left side of the endless conveyor belt moves to the right side of the endless conveyor belt before wear occurs In this case, the worn part is removed from the forward side of the endless conveyor belt, and the part that has been removed from the forward side of the endless conveyor belt before changing the mounting direction is opposed to the forward side of the endless conveyor belt. This is a new location for receiving the forward side of the conveyor belt.
Therefore, even if wear occurs at the location where the endless conveyor belt of the cylindrical body is received, the cylindrical body can be reused to receive the endless conveyor belt on the forward path side, and a new cylindrical body is not required. As a whole, an excellent nursery box conveyor that can be used at low cost over a long period of time can be obtained.

In the ninth aspect of the invention, the support shaft is constituted by a metal rod having a circular longitudinal section, and the cylindrical body is constituted by a resin tube having a circular longitudinal section.
In the tenth aspect of the invention, a posture in which the short side of the long side and the short side of the seedling box is along the nursery box transporting direction is set as the transporting posture.

It is a front view which shows the whole sowing plant. It is a top view which shows the whole sowing plant. It is a top view which shows the site | part in which the attitude | position determination guide plate and 1st supply guide plate of the conveyor apparatus were provided. (A) is a front view which shows the downward use state of a 1st seedling box conveyor, (b) is a front view which shows the raising folding state of a 1st seedling box conveyor. It is a vertical side view which shows a support means. It is a vertical front view which shows a support means. It is a vertical side view which shows the state which replaced the cylindrical body and positioning cylindrical body of the support means. It is a vertical front view which shows a floor earth material supply apparatus. It is a vertical side view which shows a floor earth material supply apparatus. It is a side view which shows a brush height adjustment mechanism. It is a top view which shows a brush height adjustment mechanism. It is a front view which shows the support structure of an adjustment shaft. It is a front view which shows the support structure of a leveling brush. It is a diagram which shows the structure in the front view of a transmission mechanism. It is a top view which shows a transmission mechanism. It is a side view which shows the site | part by which the motor was arrange | positioned. It is a front view which shows a supply drive mechanism. It is a perspective view which shows a connection change mechanism. It is a perspective view which shows a motor stand connection change mechanism. It is a vertical side view which shows the support means provided with 1st another embodiment. It is a vertical side view which shows the support means provided with 2nd another embodiment. It is a vertical side view which shows the support means provided with 3rd another embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing the entire sowing plant according to an embodiment of the present invention. FIG. 2 is a plan view showing the entire sowing plant according to the embodiment of the present invention. As shown in these drawings, the seeding plant according to the embodiment of the present invention is a conveyor device C in which the conveyance start end is constituted by the first seedling box conveyor 10 and the seedling box stand 1 is connected to the conveyance end side. And a floor soil material supply device 40, an irrigation device 50, a seeding device 60, and a soil covering material supply device 70 provided in the conveyor device C side by side in the direction of raising the seedling box by the conveyor device C.

  In this seeding plant, when the seedling box 2 is placed at the conveyance start end of the conveyor device C, the seedling box 2 is supplied by the conveyor device C to the floor soil material supply device 40, the irrigation device 50, the seeding device 60, and the covering material supply. The apparatus 70 is supplied in that order, and the rice seedling box 2 is supplied with rice husk charcoal as charcoal (the rice rice husk has been subjected to a scouring process) to form a bed soil portion. The irrigation water is supplied to the floor soil part, and the seed rice seeds are supplied in a scattered state on the floor soil part after the irrigation water is supplied, and the seed material is applied as a covering material on the floor soil part after the seed sag is supplied. A seeding process is performed in which rice husk charcoal is supplied to form a covering portion, and the seedling box 2 after the seeding process is placed on the seedling box base 1.

  The conveyor device C will be described.

  The conveyor device C includes a first seedling box conveyor 10 that constitutes a transfer start end of the conveyor device C, a second seedling box conveyor 20 that is connected to the transfer terminal end side of the first seedling box conveyor 10, and a second seedling. A third nursery box conveyor 30 connected to the conveyance terminal side of the box conveyor 20 is provided.

The length of the transport distance of the seedling box 2 by the conveyor device C is set as follows.
The posture of the seedling box 2 placed on the conveyor device C with the short side of the long side and the short side of the seedling box 2 along the direction of transporting the seedling box is set as the seedling box 2 in the conveyor device C. Is set as the transport posture. When it is discovered that the seedling box 2 conveyed from the floor soil material supply device 40 to the irrigation device 50 has problems such as a shift of the floor soil portion or poor supply, the leveling brush 41 provided in the floor soil material supply device 40 It is possible to take out the seedling box 2 from the interval D1 with the machine casing 51 of the irrigation apparatus 50. When it is discovered that the seedling box 2 conveyed from the irrigation device 50 to the seeding device 60 has a problem such as displacement of the floor soil portion, from the interval D2 between the machine frame 51 of the irrigation device 50 and the seed tank 61 of the seeding device 60. When the seedling box 2 can be taken out and seed pods are supplied by the sowing device 60, the irrigation water supplied by the irrigation device 50 has already soaked into the floor soil portion, and the irrigation water is placed on the upper surface of the floor soil portion. The seedling box 2 is transported from the irrigation device 50 to the seeding device 60 by taking a water infiltration time so that the seedling box 2 is supplied in a state where it is not floating. A medicine supply device (not shown) may be additionally provided between the seeding device 60 and the soil covering material supply device 70 as required. The seed tank 61 of the seeding device 60 and the soil covering material tank 71 of the soil covering material supply device 70 are provided. The interval D3 is set to a size that allows the medicine supply device to be installed.
In other words, the conveyor device C is configured to have a transport distance considering the length of the seedling box 1 on the short side, the removal of the seedling box 2, the penetration of irrigation water in the floor soil portion, and the additional installation of the chemical supply device. It is.

  As shown in FIGS. 1 and 2, the first nursery box conveyor 10 has an end on the lower side in the nursery box transport direction on the end of the conveyor frame 21 of the second seedling box conveyor 20 on the upper side in the nursery box transport direction. A conveyor frame 11 connected to the conveyor frame 11 and a pair of left and right endless conveyor belts 12 and 12 that are supported on the conveyor frame 11 in a direction orthogonal to the nursery box conveyance direction and spaced apart from each other by a predetermined distance. It is.

  The conveyor frame 11 of the first nursery box conveyor 10 is a pair of left and right main frames 11a, 11a provided at the left and right ends in a direction orthogonal to the nursery box transport direction of the first nursery box conveyor 10. It is configured with. The pair of left and right endless conveyor belts 12 and 12 of the first seedling box conveyor 10 are rotatable integrally with a start end side support shaft 13 rotatably supported at the end of the pair of left and right main frames 11a and 11a on the transfer start end side. A start-side pulley 14 provided on the end-side pulley 15 provided on a start-end side support shaft 22 rotatably supported on an end portion on the transfer start-end side of the conveyor frame 21 of the second seedling conveyor 20; It is wound around.

  Accordingly, in the first nursery box conveyor 10, the pair of left and right endless conveyor belts 12 and 12 are driven by the terminal pulley 15 when the starting end support shaft 22 of the second seedling box conveyor 20 is driven. The placed seedling box 2 is received and conveyed from below by the forward path side of the pair of left and right endless conveyor belts 12, and sent to the second seedling box conveyor 20.

  As shown in FIGS. 1 and 2, the second seedling box conveyor 20 includes a conveyor frame 21 having a pair of front and rear stands 23, 23 arranged in the seedling box transport direction, and a seedling box transport direction on the conveyor frame 21. It comprises a pair of left and right endless conveyor belts 24, 24 that are arranged in a perpendicular direction at a predetermined interval and supported so as to be able to drive and rotate.

  The conveyor frame 21 of the second seedling box conveyor 20 is a pair of left and right main frames 21a, 21a provided at the left and right ends in a direction orthogonal to the nursery box transport direction of the second seedling box conveyor 20. It is configured with. The pair of left and right endless conveyor belts 24, 24 of the second seedling box conveyor 20 are integrally rotatable on a start end side support shaft 22 that is rotatably supported at ends of the pair of left and right main frames 21 a, 21 a on the transfer start end side. And a drive shaft 26 that is rotatably supported by being arranged on the lower end side in the nursery box transport direction than the irrigation device 50 at the end of the pair of left and right main frames 21a, 21a on the transport end side. It is wound around a terminal pulley 27 provided so as to be rotatable integrally.

  Therefore, the second nursery box conveyor 20 is fed by the first nursery box conveyor 10 by driving the drive shaft 26 so that the pair of left and right endless conveyor belts 24, 24 are driven by the terminal-side pulley 27. The nursery box 2 is received and conveyed from below by the forward path side of the pair of left and right endless conveyor belts 24, 24, and is supplied to the floor soil material supply device 40. The floor soil material supply device 40 generates rice husk charcoal as floor soil. The seedling box 2 that has been supplied is supplied to the irrigation device 50, and the seedling box 2 that has been supplied with irrigation water by the irrigation device 50 is fed into the third seedling box conveyor 30.

  As shown in FIGS. 1 and 2, the third seedling box conveyor 30 includes a conveyor frame 32 to which a pair of front and rear stands 31, 31 arranged in the seedling box transport direction are attached, and a seedling box transport direction on the conveyor frame 32. It comprises a pair of left and right endless conveyor belts 33, 33 which are arranged in a perpendicular direction at a predetermined interval and supported so as to be capable of driving and rotating.

  The conveyor frame 32 of the third seedling box conveyor 30 is a pair of left and right main frames 32a, 32a provided at the left and right ends in a direction orthogonal to the nursery box transport direction of the third seedling box conveyor 30. It is configured with. The pair of left and right endless conveyor belts 33, 33 of the third nursery box conveyor 30 are integrally rotatable with a start end side support shaft 34 rotatably supported at the end of the pair of left and right main frames 32a, 32a on the transfer start end side. And a drive shaft which is rotatably supported by being arranged on the lower side of the seedling box transport direction with respect to the covering material supply device 70 at the end of the pair of left and right main frames 32a and 32a on the transport end side. 36 is wound around terminal-side pulleys 37 and 37 provided so as to be rotatable integrally with 36.

  Therefore, the third seedling box conveyor 30 is fed by the second seedling box conveyor 20 by driving the drive shaft 36 so that the pair of left and right endless conveyor belts 33 and 33 are driven by the terminal-side pulley 37. The seedling box 2 is received and conveyed from below by the forward side of the pair of left and right endless conveyor belts 33, 33, supplied to the seeding device 60, and the seedling box 2 after the seed pod is supplied by the seeding device 60 is supplied with a covering material. The seedling box 2 after being supplied to the apparatus 70 and supplied with the rice husk charcoal as the covering soil by the soil covering material supply apparatus 70 is fed into the seedling box base 1.

  The seedling box stand 1 has a pair of left and right main underframes 1a and 1a, one end of which is connected to the lower end of the conveyor frame 32 of the third seedling box conveyor 30 in the nursery box transport direction, and a predetermined number in the nursery box transport direction. A horizontal beam 1b connected to a pair of left and right main underframes 1a, 1a arranged at intervals is provided, and the seedling box 2 that has been seeded from the third seedling box conveyor 30 is connected to the horizontal beam 1b. Receive and support by.

  The conveyor device C is arranged on one end side in a direction orthogonal to the seedling box transport direction of the first seedling box conveyor 10 and supported by the conveyor frame 11 of the first seedling box conveyor 10; A pair of left and right first supply guides arranged at both sides in the direction perpendicular to the nursery box transport direction at the entrance of the floor soil material supply device 40 and supported by the conveyor frame 21 of the second nursery box conveyor 20 It distributes and arrange | positions on both sides in the direction orthogonal to the nursery box conveyance direction of the board | substrates 4 and 4 and the nursery box conveyance direction lower side rather than the leveling brush 41 with which the floor earth material supply apparatus 10 is equipped. And a pair of left and right second supply guide plates 5 and 5 supported by the conveyor frame 21 of the second seedling box conveyor 20.

  Conveyor device C is a pair of left and right third supplies that are distributed and arranged on both sides in the direction orthogonal to the seedling box transport direction at the entrance of seeding device 60 and supported by conveyor frame 32 of third seedling box conveyor 30. A pair of left and right guide plates 6 and 6 and a left and right pair distributed and arranged on both sides in the direction orthogonal to the nursery box transport direction at the entrance of the covering material supply device 70 and supported by the conveyor frame 32 of the third nursery box conveyor 30 4th supply guide plates 7 and 7 are provided.

  As shown in FIG. 3, the posture determining guide plate 3 positioned on the first seedling box conveyor 10 is positioned on the outer surface side of the side wall positioned on the short side of the seedling box 2 inside the conveyor of the posture determining guide plate 3. When the seedling box 2 is placed on the first seedling box conveyor 10 in a state of being abutted against the acting surface, the seedling box 2 placed on the first seedling box conveyor 10 is conveyed by the action surface by a predetermined amount. Determine your posture.

  The pair of left and right first supply guide plates 4, 4 located on the second seedling box conveyor 20 are connected to the first seedling box conveyor 10 from the first seedling conveyor 10 to the seedling box 2 fed to the second seedling conveyor 20. When the conveyance posture disorder due to the connection of the conveyor frames 11 and 21 of the second nursery box conveyor 20 occurs, the end portion of the seedling box 2 fed to the floor soil material supply device 10 is the first supply guide plate 4. The seedling box 2 fed to the floor soil material supply device 10 is corrected to a predetermined transport posture by abutting and slidingly contacting the working surface.

  As shown in FIG. 2, the pair of left and right second supply guide plates 5, 5 positioned on the second seedling box conveyor 20 is used for the action of the leveling brush 41 on the seedling box 2 delivered from the floor soil material supply device 40. When the conveyance posture disorder resulting from this occurs, the end portion of the seedling box 2 conveyed toward the irrigation device 50 comes into contact with and slides on the action surface of the second supply guide plate 5, thereby toward the irrigation device 50. The posture of the nursery box 2 to be transported is corrected to a predetermined transport posture.

  The pair of left and right third supply guide plates 6, 6 located on the third seedling box conveyor 30 is connected to the seedling box 2 fed from the second seedling conveyor 20 to the third seedling conveyor 30. And the end of the seedling box 2 fed to the seeding device 60 is the working surface of the third supply guide plate 6 when the transport posture disorder occurs due to the connection between the conveyor frames 21 and 32 of the third seedling box conveyor 30 and the like. By contact and sliding contact, the posture of the seedling box 2 fed to the seeding device 60 is corrected to a predetermined transport posture.

  The pair of left and right fourth supply guide plates 7, 7 located on the third seedling box conveyor 30 has the conveyance posture disorder caused by the shaking motion of the endless conveyor belt 33 in the seedling box 2 sent out from the seeding device 60. In this case, when the seedling box 2 is sent to the covering material supply device 70, the end portion of the seedling box 2 comes into contact with and slides on the working surface of the fourth supply guide plate 7, thereby being sent to the covering material supply device 70. The posture of the seedling box 2 is corrected to a predetermined transport posture.

  The posture determining guide plate 3, the first supply guide plate 4, the second supply guide plate 5, the third supply guide plate 6 and the fourth supply guide plate 7 are transported in a seedling box using the elongated hole shape of the mounting bolt hole. The position is adjusted in a direction orthogonal to the direction. The first supply guide plate 4, the second supply guide plate 5, the third supply guide plate 6, and the fourth supply guide plate 7 have an inclined introduction surface provided at the start end portion in a state inclined with respect to the nursery box transport direction. I have.

  The 1st seedling box conveyor 10 shown as a continuous line in FIG. 1 shows the lowering use state, and FIG. 4A is a front view showing the lowering use state of the first seedling box conveyor 10. The 1st seedling box conveyor 10 shown with a dashed-two dotted line in FIG. 1 shows an upward folding state, FIG.4 (b) is a front view which shows the upward folding state of the 1st seedling box conveyor 10. FIG. As shown in these drawings, the first nursery box conveyor 10 includes a conveyor frame 11 of the first nursery box conveyor 10 and a conveyor frame 21 of the second nursery box conveyor 20 which are connected by connecting tools 11b and 21b. When the conveyor frame 11 of the first seedling box conveyor 10 is swung up and down around the axis P, the state is switched between the upward folded state and the downward use state. When switching the first nursery box conveyor 10 between the upfolded state and the lowered use state, the shaft core P on which the conveyor frame 11 of the first nursery box conveyor 10 swings and the pair of left and right of the first nursery box conveyor 10 As shown in FIG. 4 (b), the first raising seedling is caused by the difference in the axial center of the starting end side support shaft 22 of the second raising seedling box conveyor 20 around which the conveyance end side of the endless conveyor belt 12 is wound. The pair of left and right endless conveyor belts 12 and 12 of the box conveyor 10 is slightly moved and adjusted to the conveyance end side, so that the pair of left and right endless conveyor belts 12 and 12 are loosened than when they are used. Switch to the state. The movement adjustment of the start end side support shaft 13 is performed using a long hole shape of the shaft hole 16 provided so that the start end side support shaft 13 penetrates the pair of left and right main frames 11a, 11a.

  The seedling box stand 1 shown by a two-dot chain line in FIG. 1 shows an upward folded state, and the seedling box stand 1 shown by a solid line in FIG. 1 shows a downward use state. As shown in this figure, the seedling box base 1 is swung up and down around an axis that connects the main frame 1a of the seedling box base 1 and the conveyor frame 32 of the third seedling box conveyor 30. Then, the state is switched between the upward folded state and the downward use state.

  Accordingly, in the seeding plant, the size of the first seedling box conveyor 10 and the seedling box stand 1 in the ascending folding state during the transfer is smaller than that in use by the conveyor device C in the direction of raising the seedling box. And can be accommodated advantageously in the container.

  The first nursery box conveyor 10 has a first end side support shaft 13 wound around the conveyance start end side of the pair of left and right endless conveyor belts 12 and 12 and a conveyance end side of the pair of left and right endless conveyor belts 12 and 12 wound around. A plurality of support means 80 are provided between the starter side support shafts 22 of the second seedling box conveyor 20 and arranged side by side at a predetermined interval in the nursery box transport direction.

  The second seedling box conveyor 20 has a start end side support shaft 22 around which the conveyance start end side of the pair of left and right endless conveyor belts 24, 24 is wound, and a termination end at which the conveyance end side of the pair of left and right endless conveyor belts 24, 24 is wound. A plurality of support means 80 are provided between the drive shaft 26 serving as a side support shaft and arranged at a predetermined interval in the nursery box transport direction.

  The third nursery box conveyor 30 has a start end side support shaft 34 wound around the conveyance start end side of the pair of left and right endless conveyor belts 33, 33 and a termination end wound around the conveyance end side of the pair of left and right endless conveyor belts 33, 33. A plurality of support means 80 are provided between the drive shaft 36 as a side support shaft and arranged at a predetermined interval in the nursery box transport direction.

  FIG. 5 is a longitudinal side view showing the support means 80 provided in the first nursery box conveyor 10, the second nursery box conveyor 20, and the third nursery box conveyor 30. FIG. FIG. 6 is a longitudinal front view showing the support means 80 provided in the first nursery box conveyor 10, the second nursery box conveyor 20, and the third nursery box conveyor 30. FIG. As shown in these drawings, the support means 80 provided in the first nursery box conveyor 10, the second nursery box conveyor 20, and the third nursery box conveyor 30 is along the direction orthogonal to the nursery box transport direction. A pair of left and right main frames 11a, 11a or 21a, 21a or 32a of the conveyor frame 11 or 21 or 32 of the first nursery box conveyor 20 or the second nursery box conveyor 30 Between a support shaft 82 fixed to the connecting shaft 81 a by a connecting screw 81, a pair of left and right cylindrical bodies 83, 83 that are separately fitted to both ends of the support shaft 82, and the pair of left and right cylindrical bodies 83, 83. The positioning cylindrical body 84 is arranged and externally fitted to the support shaft 82.

  The support shaft 82 is constituted by a metal rod having a circular longitudinal cross-sectional shape. The pair of left and right cylinders 83 and 83 and the positioning cylinder 84 are constituted by resin pipes having a circular longitudinal cross section.

  As shown in FIGS. 5 and 6, the pair of left and right cylindrical bodies 83, 83 are in a state where the inner peripheral surface of the cylindrical body 83 is in direct contact with the outer peripheral surface of the support shaft 82 and to the axis of the support shaft 82. The axial core 83a of the cylindrical body 83 is biased downward with respect to the axial core 82a of the support shaft 82 so that the outer peripheral surface of the support shaft 82 and the inner peripheral surface of the cylindrical body 83 are in point contact with each other as viewed in the direction along the direction.

When one cylindrical body 83 tries to be displaced along the support shaft 82, one end face 84a of the positioning cylinder 84 abuts against one end face 83e of the one cylindrical body 83 to stop, and one main frame 83 11a stops the other end face 83e of one cylindrical body 83. When the other cylindrical body 83 tries to be displaced along the support shaft 82, the other end face 84a of the positioning cylinder 84 comes into contact with one end face 83e of the other cylindrical body 83 to stop, and the other main frame 83 11a stops the other end face 83e of the other cylindrical body 83.
Accordingly, the pair of left and right cylindrical bodies 83 and 83 are positioned by the positioning cylinder 84 and the main frame 11a or 21a or 32a at the receiving action position with respect to the forward path side of the endless conveyor belt 12 or 24 or 33.

  The pair of left and right cylindrical bodies 83, 83 in the support means 80 provided in the first nursery box conveyor 10, the second nursery box conveyor 20, and the third nursery box conveyor 30 is a pair of left and right endless conveyor belts 12, 12, or 24. , 24 or 33, 33 are positioned by the positioning cylinder 84 at the receiving action position with respect to the endless conveyor belt 12 on the corresponding side or the forward path side of 24 or 33, and the left cylinder 83 is connected to the left endless conveyor belt 12 Alternatively, the left endless conveyor belt 12 or 24 or 33 is received by the forward path side while being supported by the support shaft 82 while being rotated with respect to the support shaft 82 by the rotational force applied by contact with the outward path side of 24 or 33. The right cylindrical body 83 is supported on the right endless conveyor belt 12 or 24 or 33. The right endless conveyor belt 12 or 24 or 33 is received from below by the receiving portion 83b while being supported by the support shaft 82 in a state of rotating with respect to the support shaft 82 by the rotational force applied by contact with the outward path side. To support.

  Therefore, the support means 80 provided in the first nursery box conveyor 10, the second nursery box conveyor 20 and the third nursery box conveyor 30 supports the pair of left and right cylindrical bodies 83 and 83 rotatably by the support shaft 82. The pair of left and right cylindrical bodies 83.83 are rotated by contact with the endless conveyor belt 12 or 24 or 33 to reduce the frictional force generated between the cylindrical body 83 and the endless conveyor belt 12 or 24 or 33. The endless conveyor belt 12, 24, or 33 is received and supported from below by the pair of cylinders 83, and the endless conveyor belt 12, 24, or 33 is prevented from sagging due to the load of the seedling box 2.

  The pair of left and right cylinders 83 and 83 and the single positioning cylinder 84 in each support means 80 are constituted by three equal-length divided tubes obtained by dividing one tube, whereby each cylinder The specifications of each cylinder 83 for attaching the body 83 to the support shaft 82 so as to receive the endless conveyor belt 12 or 24 or 33 on the forward path side, and the positioning cylinder 84 are a pair of left and right cylinders 83, 83. The specification for attaching to the support shaft 82 is set to be the same as that for positioning.

  FIG. 7 is a longitudinal sectional side view showing a state in which one cylindrical body 83 and the positioning cylinder 84 of the support means 80 are replaced and attached to the support shaft 82. As shown in this figure, when wear occurs in the portion 83b that receives the conveyor 12 or 24 or 33 of the cylindrical body 83, the worn cylindrical body 83 is positioned at the mounting position of the positioning cylindrical body 84 instead of the positioning cylindrical body 84. Then, the worn cylindrical body 83 and the positioning cylindrical body 84 are replaced with each other and attached to the support shaft 82 so that the positioning cylindrical body 84 is positioned at the mounting position of the cylindrical body 83 instead of the worn cylindrical body 83. Then, the positioning cylinder 84 serves as a receiving means that replaces the worn cylindrical body 83 and acts to receive the endless conveyor belt 12, 24, or 33, and the worn cylindrical body 83 replaces the positioning cylindrical body 84. Thus, the cylinders 83 and 84 can be positioned to receive the pair of left and right endless conveyor belts 12, 12 or 24, 24 or 33, 33 on the forward path side.

  The floor soil material supply device 40 will be described.

  FIG. 8 is a longitudinal front view showing the floor soil material supply device 40. FIG. 9 is a longitudinal side view showing the floor soil material supply device 40. As shown in these drawings and FIG. 1, the floor soil material supply device 40 includes a front wall plate 42 a and a rear wall plate 42 a that are distributed and connected to a pair of left and right main frames 21 a and 21 a of the second seedling box conveyor 20. A hopper-shaped floor soil material tank 43 having a lower portion connected to the body 42, and a second seedling box near the bottom of the discharge port 43 c located at the bottom of the floor soil material tank 43. The feeding belt 44 disposed and provided above the nursery box transport path of the conveyor 20, the supply chute 45 provided near the lower side in the nursery box transport direction of the discharge side end of the feeding belt 44, and the seedling raising than the supply chute 45 And a leveling brush 41 provided on the lower side in the box conveying direction.

  The floor earth material tank 43 is provided with an inlet 43d formed in an upwardly opening state at the upper end of the floor earth material tank 43, and when rice husk charcoal is introduced from the inlet 43d, Charcoal is stored in the tank in a state where the charcoal is received by the forward side 44a of the feeding belt 44 at the discharge port 43c.

  The floor soil material tank 43 is provided with a pair of stirring rotators 46 and 47 that are arranged in the moving direction f of the feeding belt 44 (see FIG. 8) and are rotatably driven near the upper portion of the discharge port 43c in the tank. .

  The pair of agitation rotating bodies 46 and 47 includes an agitation drive shaft 46a or 47a that is rotatably supported by the front and rear wall plates 42a of the floor soil material tank 43, and the axial direction and circumferential direction of the agitation drive shaft 46a or 47a. And a plurality of stirring arms 48 that are attached to the stirring drive shaft 46a or 47a so as to be integrally rotatable. Each stirring arm 48 includes an arm main body 48a extending from the stirring drive shaft 46a or 47a in the radial direction of the stirring rotating body 46 or 47, and a rotating shaft core direction of the stirring rotating body 46 or 47 from the tip of the arm main body 48a. And a stirring claw 48b extending along.

  Accordingly, the pair of stirring rotators 46 and 47 are driven to rotate in the rotation direction r by the stirring drive shaft 46a or 47a being driven to rotate, and the rice husk charcoal in the floor earth material tank 43 is stirred by the stirring arm 48. The chaff husk charcoal treated and stored in the floor soil material tank 43 is prevented from clogging in a bridge shape above the discharge port 43c.

  The feeding belt 44 is disposed slightly on the upper side in the nursery box transport direction with respect to the discharge port 43c of the floor soil material tank 43, and a driven wheel 90 that is rotatably supported by the wall plate 42a via a rotation support shaft 90a; It is wound around a drive wheel 91 that is disposed slightly below the discharge port 43c of the floor soil material tank 43 in the nursery box transport direction and is rotatably supported by the wall plate 42a. The driving wheel body 91 is provided so as to be rotatable integrally with a pay-out driving shaft 92 that is supported by the wall plate 42a so as to be driven to rotate.

  The feeding belt 44 is rotationally driven by the driving wheel body 91 in a state where the forward path side 44a facing the discharge port 43c of the feeding belt 44 moves in the moving direction f by driving the feeding driving shaft 92. The rice husk charcoal stored in the earth material tank 43 is loaded on the outer peripheral surface side of the feeding belt 44 on the portion of the feeding action surface 44b provided over the entire length of the feeding belt 44 and positioned on the forward path side 44a and conveyed. Then, the rice husk charcoal, whose stacking height has reached the set height by the scraping action by the shutter 49 located on the lower side of the discharge port 43c in the nursery box transport direction, is dropped from the discharge side of the feeding belt 44 to the supply chute 45. .

  The shutter 49 is slidably adjusted in the vertical direction by swinging a feed adjusting lever 93 (see FIG. 1) provided outside the machine body 42 to change the position of the sliding action on the feeding belt 44 up and down. The amount of rice husk charcoal fed by the feeding belt 44 is changed.

  The feeding belt 44 includes a non-slip protrusion 44c provided on the feeding surface 44b so as to be arranged in the longitudinal direction of the feeding belt 44 at a predetermined interval. The anti-slip protrusion 44c prevents the occurrence of slipping on the feeding action surface 44b of rice husk charcoal fed from the floor soil material tank 43 by the feeding belt 44, and prevents the misfeeding of rice husk charcoal by the feeding belt 44. Each of the anti-slip protrusions 44c is configured to have a shape that protrudes from the feeding action surface 44b continuously over the entire width of the feeding action surface 44b and linearly along the lateral width direction of the feeding action surface 44b. The protrusions are perpendicular to the moving direction f of the belt 44.

  The supply chute 45 is connected to a bracket 42b in which connecting pieces 45a provided at both ends of the supply chute 45 are fixed to the wall plate 42a by a connection bolt. The supply chute 45 receives and stops the chaff husk charcoal from the feeding belt 44 so as not to scatter to the lower side in the nursery box transport direction, and then drops it. The chaff husk charcoal that has hit the supply chute 45 moves in the direction along the nursery box conveyance direction and the direction orthogonal to the feeding chute 45 by the moving force applied by the contact with the supply chute 45. The thickness of the floor soil portion made of rice husk charcoal is made as uniform as possible throughout the nursery box.

  The leveling brush 41 includes an extended end portion of a support arm 94 extending from the end portion of the feeding drive shaft 92 toward the lower side in the nursery box transport direction on the outer surface side of the front wall plate 42a, and a rear wall plate. The flat drive shaft 41a rotatably supported by the extended end portion of the support arm 94 extended from the end portion of the feeding drive shaft 92 toward the lower side in the nursery box transport direction on the outer surface side of 42a, A plurality of row brushes 41b are arranged side by side in the circumferential direction of the flat drive shaft 41a and attached to the flat drive shaft 41a so as to be integrally rotatable.

  The leveling brush 41 is driven to rotate in the rotation direction Z (see FIG. 8) by driving the leveling drive shaft 41 a, and each row is placed inside the seedling box 2 that has passed under the supply chute 45. The tip side of the brush 41b is inserted, and the floor soil portion inside the nursery box 2 is scraped with the row brush 41b. Each row-shaped brush 41b is configured to have a V-shape that is located closer to the lower side in the rotation direction of the leveling brush 41 toward the inner side in the rotation axis direction of the leveling brush 41.

  Accordingly, the floor earth material supply device 10 stirs the rice husk charcoal charged into the floor earth material tank 43 by the pair of stirring rotating bodies 46 and 47 while receiving the rice husk charcoal by the feeding belt 44 to clog the rice husk charcoal. While being prevented, it is stored in the floor soil tank 43 and the delivery drive shaft 92 is driven, whereby the delivery drive shaft 92 drives the delivery belt 44 through the drive wheel 91 in the moving direction f, and the floor soil material tank. The rice husk charcoal stored in 43 is fed from the discharge port 43a of the floor soil material tank 43 by the forward path side 44a of the feeding belt 44 and dropped through the supply chute 45, whereby the second seedling box conveyor 20 The rice husk charcoal is supplied to the seedling box 2 transported by the above to form a floor soil part, and the floor soil part formed in the seedling box 2 is leveled by the leveling brush 41

As shown in FIGS. 8 and 9, the floor soil material supply device 40 extends from the inner surface side of the front wall plate 42 a and the rear wall plate 42 a toward the lower side of the feeding belt 44 and the second seedling box conveyor 20. A plate-shaped guide body 95 extending toward the transport path is provided. Each guide body 95 has a guide surface 95a that is inclined so as to be located on the inner side in the direction orthogonal to the seedling box transport direction of the second seedling box conveyor 20 toward the lower end side of the discharge side end portion of the feeding belt 44. It is provided in a state of being positioned in series between the lower part and the vicinity of the outer periphery of the flat brush 41.
That is, each guide body 95 guides the rice husk charcoal spilled from the feeding belt 44 and the supply chute 45 to the outside in the direction orthogonal to the nursery box transport direction and the rice husk charcoal bounced up by the leveling brush 41. It is received by 95a and guided so as to fall toward the inside of the seedling box 2, and rice husk charcoal is prevented from falling and accumulating on the upper end surface of the wall plate portion 2a (see FIG. 9) of the seedling box 2.

  As shown in FIG. 8, the floor earth material supply device 40 includes a scraper 96 provided on the outer peripheral side of the leveling brush 41. The scraper 96 is supported by a pair of support arms 94, 94 via connecting piece portions 96 a provided at both ends of the scraper 96, and scrapes rice husk charcoal adhering to the leveling brush 41 from the leveling brush 41. .

  The floor earth material supply device 40 includes a brush height adjustment mechanism 100 having an adjustment shaft 101 provided near the outside of the floor earth material tank 43, and the brush height adjustment mechanism 100 adjusts the height of the leveling brush 41. Is supposed to do.

  As shown in FIGS. 10 and 11, the brush height adjustment mechanism 100 includes the adjustment shaft 101, a pair of contact blocks 102, 102 attached to both ends of the adjustment shaft 101 and a pair of contact blocks. A pair of stoppers 103, 103 that receive and act on the attachment blocks 102, 102 are provided.

  The adjusting shaft 101 is rotatably passed through upper ends of a pair of suspension arms 104, 104 that are distributed and connected to a pair of support arms 94, 94 that rotatably support the leveling brush 41.

  As shown in FIGS. 10 and 12, each stopper 103 includes a screw shaft portion 103 a vertically facing the mounting screw hole 105 a provided in the bracket 105 fixed to the front portion of the wall plate 42 a, and the screw shaft portion. And a block receiving portion 103b fixed to the upper end portion of 103a.

  That is, each stopper 103 is rotated and adjusted when the block receiving portion 103b which is also used as the operation portion is rotated, and the screw shaft portion 103a is rotated up and down with respect to the bracket 105, so that the block receiving portion 103b is moved together with the screw shaft portion 103a. The block receiving portion 103b is lifted and adjusted so as to receive and support the contact block 102 at a higher height than before the adjustment, or the contact block 102 is lower than the height before the adjustment. It is adjusted downward so that it is positioned and supported.

  As shown in FIG. 12, each contact block 102 is configured to have a rectangular outer peripheral shape, and includes four contact edges 102a to 102d. The adjustment shaft 101 rotates together with the operation tool 106 to rotate the pair of contact blocks 102 and 102 by rotating and adjusting the operation tool 106 provided at one end portion of the adjustment shaft 102 so as to be integrally rotatable. One abutting side is selected from the four abutting sides 102 a to 102 d of the abutting blocks 102, 102 and brought into contact with the block receiving portion 103 b of the stopper 103. As shown in FIG. 12, the lengths of the distances from the axis of the adjustment shaft 101 of the four contact edges 102a to 102d of each contact block 102 are set to four different lengths. The attachment block 102 changes the arrangement height of the adjusting shaft 101 received and supported by the stopper 103 via the contact block 102 by changing the contact side that abuts the block receiving portion 103 b of the stopper 103.

  Therefore, the brush height adjusting mechanism 100 adjusts the rotation of the operating tool 106 to change the abutting side of the abutting block 102 that abuts the block receiving portion 103b of the stopper 103, and the block receiving portion 103b in each stopper 103. One or both of the adjustments for changing the mounting height of the stopper 103 by adjusting the rotation of the stopper 103 is performed, whereby the arrangement height of the adjustment shaft 101 is changed to feed the pair of support arms 94 and 94 to the rotation of the drive shaft 92. By swinging up and down around the shaft core, the mounting height of the flat brush 41 with respect to the machine body 42 is changed, and the action position of the flat brush 41 with respect to the seedling box 2 is changed to the vertical side. Each stopper 103 is fixed by a wing nut 108 at a predetermined mounting height with respect to the bracket 105.

  The brush height adjusting mechanism 100 includes springs 107 connected to both ends of the adjusting shaft 101, and the springs 107 abut and bias the pair of abutting blocks 102 and 102 against the block receiving portion 103 b of the stopper 103. Prevents the leveling brush 41 from being lifted.

  The irrigation apparatus 50, the sowing apparatus 60, and the covering material supply apparatus 70 are demonstrated.

  As shown in FIGS. 1 and 2, the irrigation device 50 includes an airframe 51 attached to a pair of left and right main frames 21 a and 21 a of the second seedling box conveyor 20, and an upper part of the nursery box conveyance path of the second seedling conveyor 20. And an irrigation pipe 52 connected to the airframe 51.

  The irrigation device 50 is provided in the floor soil portion of the seedling box 2 from the floor soil material supply device 40 conveyed by the second seedling box conveyor 20, from an ejection hole provided side by side on the irrigation pipe 52 in the axial direction thereof. Spray irrigation water.

  As shown in FIGS. 1 and 2, the seeding device 60 includes a machine body 62 attached to a pair of left and right main frames 32 a and 32 a of the third seedling box conveyor 30, a seed tank 61 supported by the machine body 62, a seed A diffusion plate 63 provided below the discharge port of the tank 61 is provided.

  The seed tank 61 is provided with a feeding roll 64 that is provided at a discharge port of the seed tank 61 so as to be driven to rotate.

  When the feeding roll 64 is driven, the seeding device 60 feeds seed pods stored in the seed tank 61 from the seed tank 61 by the feeding roll 64 and drops them onto the diffusion plate 63, and conveys them by the third seedling box conveyor 30. The seed pods are dropped from the diffusion plate 63 to the seedling box 2 from the irrigation device 50 to be supplied, and the seed pods are supplied in a dispersed state to the floor soil portion of the seedling box 2 to which the irrigation water has been supplied.

  As shown in FIGS. 1 and 2, the soil covering material supply device 70 includes a machine body 72 attached to a pair of left and right main frames 32 a and 32 a of a third seedling box conveyor 30, and a soil covering material tank supported by the machine body 72. 71 and a diffusion plate 73 provided below the discharge port of the soil covering material tank 71.

  The soil covering material tank 71 is provided at the discharge port of the soil covering material tank 71 so as to be driven and rotated, and is located inside the soil covering material tank 71 near the upper side of the discharge port so as to be driven and rotated. The stirring rotator 75 is provided.

  Therefore, the earth covering material supply device 70 stirs the rice husk charcoal as the earth covering material charged into the earth covering material tank 71 by the stirring rotating body 75 so that the rice hull charcoal is bridged and clogged above the discharge port. The rice husk charcoal is stored in the earth covering material tank 71 while the feeding roll 74 is driven, so that the rice husk charcoal stored in the earth covering material tank 71 is fed from the earth covering material tank 71 by the feeding roll 74 and diffused. The rice husk charcoal is dropped onto the seedling box 2 from the seeding device 60 which is dropped on the plate 73 and conveyed by the third seedling box conveyor 30, and the rice husk is placed on the floor soil portion to which the seedlings of the seedling box 2 are supplied. A covering part made of charcoal is formed.

  In the seeding device 60 and the covering material supply device 70, when the seed pod or rice husk charcoal dropped from the feeding roll 64 or 74 hits the diffusion plates 63 and 73, the moving force applied by this hitting causes the nursery box transport direction and the seedling raising Disperses in a direction perpendicular to the box conveyance direction. Thereby, the diffusion plates 63 and 73 of the seeding device 60 and the covering material supply device 70 uniformly disperse the rice husk and charcoal as covering soil over the entire surface of the floor soil portion of the seedling box 2.

  In the seeding device 60 and the soil covering material supply device 70, the guide body configured to have the same guide surface as the guide body 95 included in the soil covering material supply device 40 is formed on both sides in the direction orthogonal to the feeding direction of the feeding roll 64 or 74. The seed body and rice husk kun charcoal are prevented from dropping and accumulating on the upper end surface of the wall plate 2a of the seedling box 2 by the guide body.

  The floor soil material tank 43 of the floor soil material supply device 40, the seed tank 61 of the sowing device 60, and the soil covering material tank 71 of the soil covering material supply device 70 are lower tanks 43a, 61a or 71a connected to the airframe 42, 51 or 62, respectively. The upper tank 43b, 61b or 71b is detachably attached to the lower tank 43a, 61a or 71a. The upper tank 43b, 61b, or 71b is connected to the lower tank 43a, 61a, or 71a in a communication state by inserting the lower end of the upper tank 43b, 61b, or 71b into the upper end of the lower tank 43a, 61a, or 71a.

  That is, when transporting the sowing plant, the floor soil material supply device 40, the seeding device 60, and the covering material supply device 70 are compact in which the upper tank 43b or 61b or 71b is detached and the vertical height is lower than in use. The upper tank 43b, 61b or 71b is compactly accommodated between the remaining lower portions connected to the conveyor device C of the soil covering material supply device 40, the seeding device 60 and the soil covering material supply device 70. It is possible to do.

  The structure which drives the conveyor apparatus C, the floor soil material supply apparatus 40, the seeding apparatus 60, and the covering material supply apparatus 70 is demonstrated.

  The seeding plant includes a motor 111 supported by an input case 110 provided at an end of the conveyor frame 21 of the second seedling box conveyor 20 and a side of the conveyor frame 21 of the second seedling box conveyor 20. And the transmission mechanism 112 provided across the lateral side of the conveyor frame 32 of the third nursery box conveyor 30, and the second and third nursery box conveyors 20, 30 are driven by the transmission mechanism 112 with the driving force output from the motor 111. To drive the endless conveyor belts 12, 24, 33 of the first, second and third nursery box conveyors 10, 20, 30.

The motor 111 is constituted by an electric motor. As shown in FIGS. 1 and 2, the motor 111 has a floor soil material supply device 40 and an end portion on the conveyance termination side of the first seedling box conveyor 10 closer to the seedling box transport direction than the floor soil material supply device 40. Between the two.
Therefore, the motor 111 is located away from the irrigation device 50 and is covered by the floor soil material supply device 40, and the water of the motor 111 due to the irrigation water sprayed by the irrigation device 50 can be avoided. Further, the motor 111 is located on the side of the first seedling box conveyor 10 and is located near the worker who supplies the seedling box 2 to the first seedling box conveyor 10. On / off operation can be easily performed.

  FIG. 14 is a diagram showing the structure of the transmission mechanism 112 in a front view. FIG. 15 is a plan view showing the transmission mechanism 112. FIG. 16 is a side view showing a portion where the motor 111 is disposed. As shown in FIGS. 1 and 2, the transmission mechanism 112 includes an input case 110 provided on the main frame 21 a so as to extend upward from the main frame 21 a of the second seedling box conveyor 20. A transmission case 113 provided across the lateral outer side of the main frame 21a of the second seedling box conveyor 20 and the lateral outer side of the main frame 32a of the third seedling box conveyor 30, and the upper side in the transmission direction of the input case 110 and the transmission case 113 An input chain 114 provided over the inside of the end portion and a plurality of transmission chains 115 provided side by side in the transmission direction inside the transmission case 113 are configured.

  As shown in FIGS. 14, 15, and 16, the input chain 114 is an input shaft positioned inside the output sprocket 111 b provided on the output shaft 111 a of the motor 111 so as to be integrally rotatable and the upper end portion in the transmission direction of the transmission case 113. The output shaft 111 a of the motor 111 is interlocked with the input shaft 116 of the transmission case 113. The input shaft 116 is attached over a pair of left and right main frames 21a and 21a of the second seedling box conveyor 20, and serves as a connecting shaft that connects the pair of left and right main frames 21a and 21a.

  As shown in FIGS. 14 and 15, one transmission chain 115 of the plurality of transmission chains 115 is an input shaft 116 of a plurality of relay transmission shafts arranged in the transmission direction inside the transmission case 113. Is wound around a transmission sprocket 119 provided so as to be integrally rotatable with the relay transmission shaft 118 and a transmission sprocket 119 provided so as to be integrally rotatable with the input shaft 116, and the input shaft 116 is interlocked with the relay transmission shaft 118. A part of the plurality of transmission chains 115 is wound around a transmission sprocket that is rotatably provided integrally with a pair of adjacent relay transmission shafts 120, 120 of the plurality of relay transmission shafts. A pair of adjacent relay transmission shafts 120, 120 are interlocked. One transmission chain 115 of the plurality of transmission chains 115 includes a conveyor drive sprocket that is provided to rotate integrally with the drive shaft 26 of the second seedling box conveyor 20, and a relay transmission shaft that is located near the drive shaft 26. The relay transmission shaft 121 is interlocked with the drive shaft 26 of the second nursery box conveyor 20. One endless transmission chain 115 of the plurality of transmission chains 115 is connected to a conveyor drive sprocket provided integrally with the drive shaft 36 of the third seedling box conveyor 30 and a relay transmission shaft 122 close to the drive shaft 36. The relay transmission shaft 122 is interlocked with the drive shaft 36 of the third nursery box conveyor 30.

  As shown in FIGS. 2 and 15, a pair of left and right endless conveyor belts 12, 12 of the first nursery box conveyor 10, and a pair of left and right ends of the second seedling box conveyor 20 are wound on the terminal pulley 15. A start end side pulley 25 around which the transport start end side of the endless conveyor belts 24, 24 is wound is provided so as to be integrally rotatable on the start end side support shaft 22, and a pair of left and right endless conveyor belts 12 of the first seedling box conveyor 10, 12 is driven from the endless conveyor belt 24 of the second nursery box conveyor 20 and driven.

  The sowing plant includes a supply driving mechanism 130 that transmits the driving force of the motor 111 from the transmission mechanism 112 to the floor soil material supply device 40 to drive the feeding belt 44, the stirring rotating bodies 46 and 47, and the leveling brush 41. Yes.

  FIG. 17 is a front view showing the supply drive mechanism 130. As shown in this figure and FIGS. 9, 14, and 15, the supply drive mechanism 130 includes a transmission chain 131 and a flat transmission chain 132 provided on the lateral outer side of the floor soil material supply device 40 on the side where the transmission mechanism 112 is located. The floor soil material supply device 40 includes a stirring transmission chain 133 and an interlocking chain 134 provided on the lateral outer side opposite to the side where the transmission mechanism 112 is located.

  The transmission chain 131 is located on the upper side in the nursery box transport direction with respect to the irrigation device 50 among the plurality of relay transmission shafts of the transmission mechanism 112 and on the lower side in the nursery box transport direction with respect to the motor 111. 124 is wound around an output sprocket 135 provided so as to be rotatable integrally with 124, and an input sprocket 136 provided at an end portion of the feeding drive shaft 92. The input sprocket 136 is linked to the feed drive shaft 92 via the clutch 145.

  The leveling transmission chain 132 rotates integrally with the output sprocket 137 provided at the end of the feeding drive shaft 92 so as to be integrally rotatable and the end of the leveling brush 41 on the side where the transmission mechanism 112 of the leveling drive shaft 41a is located. It is wound around a flat drive sprocket 138 provided freely.

  The agitating transmission chain 133 is provided with an output sprocket 139 provided at the end of the feeding drive shaft 92 opposite to the side where the transmission mechanism 112 is located, and a feeding drive of the pair of stirring rotating bodies 46 and 47. It is wound around an agitation drive sprocket 140 provided so as to be integrally rotatable at the end of the agitation drive shaft 46a on the side close to the shaft 92 on the side opposite to the side where the transmission mechanism 112 is located. The interlocking chain 134 is an end portion on the opposite side to the side where the transmission mechanism 112 of the stirring drive shaft 46a of the stirring rotating body 46 of the pair of stirring rotating bodies 46 and 47 to which the stirring transmission chain 133 is connected. And an output sprocket 141 provided so as to be integrally rotatable with each other, and an agitation drive shaft 47a of a driven side agitation rotor 47 to which the agitation transmission chain 133 of the pair of agitation rotators 46 and 47 is not connected is integrally rotated. It is wound around an input sprocket 142 provided freely.

  Therefore, the supply driving mechanism 130 transmits the driving force of the motor 111 transmitted to the transmission mechanism 122 from the relay transmission shaft 124 to the feeding drive shaft 92 by the transmission chain 131, and from the feeding driving shaft 92 to the stirring transmission chain 133. Is transmitted from the stirring drive shaft 46 of the one stirring rotor 46 to the other stirring rotor 47 by the interlocking chain 134, and leveled by the leveling transmission chain 132 from the feeding drive shaft 92. The feeding belt 44, the pair of stirring rotating bodies 46 and 47, and the leveling brush 41 are transmitted to the brush 41 using a motor 111 that drives the first, second, and third nursery box conveyors 10, 20, and 30 as a driving source. To drive. The supply drive mechanism 130 drives the pair of stirring rotators 46 and 47 to rotate in the same rotation direction r.

  As shown in FIGS. 14 and 15, the seeding device 60 is fed with an output sprocket that is rotatably provided integrally with the relay transmission shaft 125 located below the seeding device 60 among the plurality of relay transmission shafts of the transmission mechanism 112. A seeding drive chain 66 wound around an input sprocket provided so as to rotate integrally with a seeding drive shaft 65 that is a rotation support shaft of the roll 64 is provided, and the driving force of the motor 111 transmitted to the transmission mechanism 122 is Transmission from the relay transmission shaft 125 to the feeding drive shaft 65 by the seeding drive chain 66 drives the feeding roll 64.

  In the covering material supply device 70, the rotation support of the output sprocket and the feeding roll 74 provided so as to rotate integrally with the relay transmission shaft 122 located below the covering material supply device 70 among the plurality of relay transmission shafts of the transmission mechanism 112. Rotation support shaft of a soil cover drive chain 77 wound around an input sprocket provided on a soil cover drive shaft 76 comprising a shaft, and a transmission sprocket provided on the soil cover drive shaft 76 so as to be rotatable together with an agitation rotating body 75 An agitation transmission chain 79 is provided on an input sprocket provided on an agitation drive shaft 78 which is integrally rotatable.

  Therefore, in the soil covering material supply device 70, the driving force of the motor 111 transmitted to the transmission mechanism 122 is transmitted from the relay transmission shaft 122 to the soil covering drive shaft 76 by the soil covering drive chain 77, and from the soil covering drive shaft 76 to the stirring drive chain 79. To the stirring drive shaft 78 to drive the feeding roll 74 and the stirring rotating body 75.

  Therefore, the conveyor device C, the floor soil material supply device 40, the sowing device 60, and the covering material supply device 70 are driven by a single motor 111.

  As shown in FIG. 9, a clutch 145 is provided across the feed drive shaft 92 and the input sprocket 136 in the floor earth material supply device 40. The clutch 145 is switched between an on state and a disengaged state by a clutch lever 146 (see FIG. 1) located on the laterally outer side of the floor soil material supply device 40, and the transmission to the feed drive shaft 92 is switched between on and off to feed out. The belt 44, the stirring rotators 46 and 47, and the leveling brush 41 are driven or stopped.

  As shown in FIG. 13, each support arm 94 that supports the leveling brush 41 includes a shaft support member 149 that is connected to a distal end portion of the support arm 94 by a connection bolt 148, and the leveling brush 149 is interposed via the shaft support member 149. The flat drive shaft 41a of the flat brush 41 is supported.

  By changing and adjusting the mounting position of the shaft support member 149 with respect to the support arm 94 in the extending direction of the support arm 94 by the action of the elongated hole bolt hole 149a provided in the shaft support member 149, the leveling brush 41 is leveled. The flat drive shaft 41a moves along the shaft hole 94a which is a notch hole of the support arm 94, and the flat drive sprocket 138 moves together with the flat drive shaft 41a.

  That is, by changing the mounting position of the shaft support member 149, the mounting position of the flat drive sprocket 138 is changed to adjust the tension of the flat transmission chain 132.

  As shown in FIG. 9, the airframe 42 of the floor earth material supply device 40 is connected to both ends of the lower end portion of the front wall plate 42 a and the lower end portion of the rear wall plate 42 a in the nursery box transport direction. It is connected to the conveyor frame 21 of the second nursery box conveyor 20 via a change mechanism 150.

  As shown in FIG. 18, each connection changing mechanism 150 includes a connecting plate portion 151 on the machine body side that is configured by including a bent portion toward the lateral outer side of the conveyor at the lower end portion of the wall plate 42 a of the floor earth material supply device 40. The connecting plate portion 151 and a connecting bolt 152 mounted over the main frame 21a of the conveyor frame 21 of the second nursery box conveyor 20 are provided.

  Each connection changing mechanism 150 includes a bolt hole 153 provided in the connection plate portion 151 having a long hole shape and is configured as a guide hole, so that the machine body 42 of the floor earth material supply device 40 is moved along the main frame 21a. Accordingly, by adjusting the movement, the connection position of the body 42 with respect to the conveyor frame 21 of the second nursery box conveyor 20 can be changed in the nursery box transport direction.

  As shown in FIGS. 9 and 17, the output sprocket 135 as the upper ring body wound on the upper side in the transmission direction of the transmission chain 131 transmitted from the relay transmission shaft 124 of the transmission mechanism 112 to the feeding drive shaft 92 is conveyed in the nursery box. The input sprocket 136, which is supported on the conveyor frame side so as to be rotatable about the axis in the direction orthogonal to the direction, and wound on the lower side of the transmission chain 131 in the transmission direction, is orthogonal to the nursery box transport direction. It is supported on the machine body side of the floor earth material supply device 40 so as to be rotatable around the axis in the direction of the movement.

  Therefore, by changing the connection position of the machine body 42 with respect to the conveyor frame 21 of the second nursery box conveyor 20 in the floor soil material supply device 40 by the action of each connection change mechanism 150, the entire floor soil material supply device 40 is raised. The input sprocket 136, which moves in the box conveying direction and is wound on the lower side in the transmission direction of the transmission chain 131, is connected to the output sprocket 135 which is wound on the upper side in the transmission direction of the transmission chain 131. The tension of the transmission chain 131 can be adjusted by moving in the orthogonal direction.

  As shown in FIGS. 3 and 16, the motor 111 is supported by a motor base 159 including an input case 110 and a motor base body 159 a having one end connected to the inner wall plate 110 a of the input case 110. ing. The motor base 159 includes a motor base coupling change mechanism 155 provided on both ends of the inner wall plate 110a of the input case 110 in the seedling box transport direction, and a seedling raising at the end of the motor base body 159a opposite to the input case 110 side. It is connected to the conveyor frame 21 of the second nursery box conveyor 20 via motor base connection changing mechanisms 155 provided at both ends in the box conveying direction.

  As shown in FIG. 19, each motor base connection changing mechanism 155 has a motor base side connecting plate portion 156 configured by providing a bent portion toward the lateral outer side of the conveyor at the lower end portion of the inner wall plate 110a or the motor base main body 159a. And the connecting plate portion 156 and a connecting bolt 157 mounted over the main frame 21 a of the second nursery box conveyor 20.

  Since the bolt holes 158 provided in the connecting plate portion 156 on the motor base side have a long hole shape and are configured as guide holes, each motor base connection changing mechanism 155 allows the motor base 159 to be connected to the main frame 21a. By moving it along, the connection position of the motor stand 159 to the main frame 21 of the second nursery box conveyor 20 can be changed in the nursery box transport direction.

  As shown in FIG. 17, the output sprocket 111b wound on the upper side in the transmission direction of the input chain 114 that is transmitted from the output shaft 111a of the motor 111 to the input shaft 116 of the transmission case 113 is an axis in a direction orthogonal to the nursery box conveyance direction. An input sprocket 117, which is supported on the motor base 159 so as to be rotatable around the core and wound on the lower side in the transmission direction of the input chain 114, is rotatable around the axis in the direction perpendicular to the nursery box conveyance direction. Are supported on the conveyor frame 21 side of the seedling box conveyor 20.

  Therefore, by changing the connection position of the motor base 159 with respect to the main frame 21 by the action of each motor base connection change mechanism 155, the motor 111 moves together with the motor base 159 in the nursery box transport direction, and the transmission direction of the input chain 114 The output sprocket 111b wound on the upper side moves in the direction perpendicular to the rotational axis of each sprocket with respect to the input sprocket 117 wound on the lower side in the transmission direction of the input chain 114, and the tension of the input chain 114 can be adjusted. it can.

[Another embodiment]
FIG. 20 is a longitudinal side view showing the support means 80 provided with the first alternative embodiment. As shown in this figure, in the support means 80 provided with the first alternative embodiment, the metal fixed to the pair of left and right main frames 11a, 11a or 21a, 21a or 32a, 32a of the conveyor frame 11 or 21 or 32 A support shaft 82 made of resin and a single resin cylindrical body 83 that is rotatably fitted to the support shaft 82 are provided.

  The cylindrical body 83 includes a pair of receiving portions 83b, 83b, and is sandwiched between a pair of left and right main frames 11a, 11a or 21a, 21a or 32a, 32a, thereby a pair of left and right endless conveyor belts 12, 12, or 24. , 24 or 33, 33 is positioned in the receiving action position, and the forward path side of one endless conveyor belt 12 or 24 or 33 of the pair of left and right endless conveyor belts 12, 12 or 24, 24 or 33, 33 is The receiving end 83b receives and supports from below, and the other end of the endless conveyor belt 12 or 24 or 33 is received and supported from below by the other receiving portion 83b.

  FIG. 21 is a longitudinal side view showing the support means 80 provided with the second alternative embodiment. As shown in this figure, in the supporting means 80 provided with the second alternative embodiment, the metal fixed to the pair of left and right main frames 11a, 11a or 21a, 21a or 32a, 32a of the conveyor frame 11 or 21 or 32 And a pair of left and right resin cylinders 83 and 83 that are distributed to both ends of the support shaft 82 and are rotatably fitted to the support shaft 82.

  The left and right cylinders 83 are sandwiched between the positioning plate 85 fitted on the support shaft 82 and the one main frame 11a, 21a, or 32a and receive the endless conveyor belt 12 or 24 or 33 on the left or right side. It is in a state of being positioned at a position, and receives and supports the left side or right side endless conveyor belt 12 or the forward path side of 24 or 3 from below at a receiving point 83b. The positioning plate 85 is received and supported by a stopper pin 86 fixed to the support shaft 82.

  FIG. 22 is a longitudinal sectional side view showing a support means 80 having a third alternative embodiment. As shown in this figure, in the support means 80 provided with the third alternative embodiment, the metal fixed to the pair of left and right main frames 11a, 11a or 21a, 21a or 32a, 32a of the conveyor frame 11 or 21 or 32 A pair of left and right cylindrical bodies 83, 83, and a pair of left and right cylindrical bodies 83, 83 that are separately fitted to both ends of the spindle 82 and are rotatably fitted to the spindle 82. A positioning cylinder 84 made of resin and externally fitted on the support shaft 82 so as to be relatively rotatable is arranged.

  The left cylinder 83 is sandwiched between one end face 84a of the positioning cylinder 84 and the left main frame 11a, 21a, or 32a, and is positioned at the receiving position for the left endless conveyor belt 12, 24, or 33. The left endless conveyor belt 12 or 24 or 33 is received and supported from below at the receiving position 83b.

  The right cylinder 83 is positioned between the other end face 84a of the positioning cylinder 84 and the right main frame 11a, 21a, or 32a, so that the right cylinder 83 is positioned at the receiving position for the right endless conveyor belt 12 or 24 or 33. Then, the forward end side of the right endless conveyor belt 12 or 24 or 33 is received and supported from below by the receiving portion 83b.

  In the support means 80 provided with the second alternative embodiment and the support means 80 provided with the third alternative embodiment, a portion 83b for receiving the forward path side of the endless conveyor belt 12 or 24 or 33 of the left and right cylindrical bodies 83. Is set so as to be biased to one end side of the cylindrical body 83 with respect to the central portion 83c in the axial direction of the cylindrical body 83.

  Therefore, in the support means 80 provided with the second alternative embodiment and the support means 80 provided with the third alternative embodiment, wear occurs at the portion 83b of the cylindrical body 83 where the endless conveyor belt 12 or 24 or 33 is received. However, the worn cylindrical body 83 can be used again by changing the mounting direction of the worn cylindrical body 83.

  That is, when wear occurs at a portion 83b (hereinafter, referred to as a receiving portion 83b) for receiving the endless conveyor belt 12 or 24 or 33 of the cylindrical body 83, the wear is generated on the left side of the endless conveyor belt 12 or 24 or 33 before the wear occurs. The mounting direction of the cylindrical body 83 with respect to the support shaft 82 is changed so that one end of the positioned cylindrical body 83 moves to the right side of the endless conveyor belt 12 or 24 or 33. Then, the worn receiving part 83b comes off from the forward side of the endless conveyor belt 12 or 24 or 33, and the part that has been removed from the forward side of the endless conveyor belt 12 or 24 or 33 and has not been used before changing the mounting direction. This is a new location for receiving the forward side of the endless conveyor belt 12, 24, or 33 facing the forward side of the endless conveyor belt 12, 24, or 33.

[Another Example]
(1) In the above-described embodiment, the pair of left and right cylinders 83 and 83 and the positioning cylinder 84 are configured to be equal in length so that the positioning cylinder 84 can be replaced as the cylinder 83 and mounted. In the example shown, the pair of left and right cylinders 83 and 83 and the positioning cylinder 84 have different lengths so that the positioning cylinder 84 can be replaced as the cylinder 83 and mounted. Also good. If the positioning cylindrical body 84 can be replaced with the cylindrical body 83 and the endless conveyor belt can be supported, the same function as that of the above-described embodiment can be exhibited. The length of the positioning cylinder 84 may be different. In this case, the pair of left and right cylindrical bodies 83, 83 may have different lengths.
(2) In addition to arranging two endless conveyor belts in a direction perpendicular to the nursery box transport direction, three or more endless conveyor belts may be arranged in a direction perpendicular to the nursery box transport direction. In this case, the object of the present invention can be achieved.

  INDUSTRIAL APPLICABILITY The present invention can be used for a seedling box conveyor for loading and unloading a seedling box in a warehouse, a vehicle, a farm field, etc. in addition to a seedling box conveyor equipped in a sowing plant.

2 Nursery boxes 11, 21, 32 Conveyor frame
11a, 21a, 32a Main frames 12, 24, 33 Endless conveyor belts 13 , 22, 34 Start end side support shafts 26, 36 End side support shafts 80 Support means 82 Support shafts 82a Support shafts 83 Cylindrical bodies 83b Endless conveyor belts Receiving location 83c Center location of cylindrical body 83e End surface of cylindrical body 83a Axis of cylindrical body 84 Positioning cylindrical body
85 positioning plate

Claims (10)

A plurality of endless conveyor belts are lined up at a predetermined interval in a direction orthogonal to the nursery box transport direction and supported by the conveyor frame so as to be able to be driven and rotated. The plurality of endless conveyor belts receive the nursery box from below. A nursery box conveyor to convey,
The forward path of the plurality of endless conveyor belts between a start side support shaft wound around the transport start end side of the plurality of endless conveyor belts and a terminal end support shaft wound around the transport end side of the plurality of endless conveyor belts Support means for receiving and supporting the side from below is supported on the conveyor frame along a direction orthogonal to the nursery box transport direction, and is rotatably fitted around the support shaft and rotated around the support shaft. A cylindrical body that receives and acts on the plurality of endless conveyor belts while being freely supported,
The cylindrical body is configured to be externally fitted to the support shaft in a state where the inner peripheral surface of the cylindrical body is in direct contact with the outer peripheral surface of the support shaft,
The axial center of the cylindrical body is deviated from the axial center of the support shaft in a state in which the outer peripheral surface of the support shaft and the inner peripheral surface of the cylindrical body are in point contact with each other as viewed along the axial center of the support shaft. Nursery box conveyor.   The cylindrical body is sandwiched between the plurality of endless conveyors by sandwiching the cylindrical body between a pair of main frames provided at both ends of the conveyor frame in a direction perpendicular to the nursery box transport direction. 2. The nursery box conveyor according to claim 1, wherein the nursery box conveyor is configured to be positioned at a receiving action position with respect to the belt. A plurality of endless conveyor belts are lined up at a predetermined interval in a direction orthogonal to the nursery box transport direction and supported by the conveyor frame so as to be able to be driven and rotated. The plurality of endless conveyor belts receive the nursery box from below. A nursery box conveyor to convey,
The forward path of the plurality of endless conveyor belts between a start side support shaft wound around the transport start end side of the plurality of endless conveyor belts and a terminal end support shaft wound around the transport end side of the plurality of endless conveyor belts Supporting means for receiving and supporting the side from below, a support shaft fixed to the conveyor frame along a direction orthogonal to the nursery box transfer direction, and a line along the axis of the support shaft aligned with the support shaft. A plurality of cylindrical bodies that are externally fitted rotatably and supported by the support shafts while being rotatably supported by the plurality of endless conveyor belts;
The plurality of cylindrical bodies are configured to be externally fitted to the support shaft in a state where the inner peripheral surface of the cylindrical body is in direct contact with the outer peripheral surface of the support shaft,
The shafts of the plurality of cylindrical bodies are in contact with each other in a state in which the outer peripheral surface of the support shaft and the inner peripheral surfaces of the plurality of cylindrical bodies are in point contact with each other as viewed along the axis of the support shaft. Nursery box conveyor that is biased with respect to the shaft core.   Positioned between a pair of cylindrical bodies that receive and act separately on a pair of adjacent endless conveyor belts of the plurality of endless conveyor belts, and are fitted on the support shaft, and the pair of cylindrical bodies is A positioning cylindrical body that abuts against the end surfaces of the pair of cylindrical bodies so as to be positioned at a receiving operation position with respect to the endless conveyor belt is provided to prevent positional deviation of the plurality of cylindrical bodies in the direction along the support shaft. The nursery box conveyor according to claim 3 configured as described above.   The nursery box conveyor according to claim 4, wherein the positioning cylinder is configured to have a length in a direction orthogonal to the nursery box transport direction longer than the pair of cylinders. Positioned between a pair of cylindrical bodies that receive and act separately on a pair of adjacent endless conveyor belts of the plurality of endless conveyor belts, and are fitted on the support shaft, and the pair of cylindrical bodies is A positioning cylinder that contacts the end surfaces of the pair of cylinders so as to be positioned at a receiving action position with respect to the endless conveyor belt;
The pair of cylindrical bodies is replaced with the cylindrical body as a receiving means for replacing the cylindrical body so that the pair of cylindrical bodies can be mounted on the support shaft instead of the positioning cylindrical body as positioning means for replacing the positioning cylindrical body. The seedling box conveyor according to claim 3 or 4 , wherein the specifications of the pair of cylindrical bodies and the specifications of the positioning cylinders are set to be the same so that the spindles can be mounted on the spindle.   With one main frame of a pair of main frames provided at both ends in a direction perpendicular to the nursery box transport direction in the conveyor frame in a posture along the nursery box transport direction and a positioning plate externally fitted to the support shaft The cylindrical body on one main frame side is sandwiched, and the cylindrical body on the other main frame side is sandwiched between the other main frame and the positioning plate fitted on the support shaft, so that the plurality of cylindrical bodies are 4. The nursery box conveyor according to claim 3, wherein the seedling box conveyor is configured to be individually positioned at a receiving action position with respect to the plurality of endless conveyor belts.   The part which receives the outward path side of the said endless conveyor belt of the said cylindrical body is biased to the one end side of the said cylindrical body with respect to the center location in the axial center direction of the said cylindrical body. The nursery box conveyor according to Item.   The nursery box conveyor according to any one of claims 1 to 8, wherein the support shaft is constituted by a metal rod having a circular longitudinal section, and the cylindrical body is constituted by a resin tube having a circular longitudinal section. The seedling box conveyor according to any one of claims 1 to 9, wherein a posture in which a short side of the long side and the short side of the seedling box is along the nursery box transporting direction is set as a transporting posture.

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