JP2015116154A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice transplanter comprising a conveyance device for conveying seedling trays in which preliminary seedlings are grown by utilizing driving means such as an electric motor.SOLUTION: A rice transplanter comprises: a traveling machine body; a planting part for planting seedlings, which is located at the rear part of the traveling machine body; a conveyance device for conveying seedling trays for preliminary seedlings in a front-to-back direction of the traveling machine body, which has a plurality of conveyance rollers provided at an appropriate interval in a conveying direction; driving means for rotating at least a part of the conveyance rollers in a forward direction or a reverse direction with respect to the conveying direction; and a transmission mechanism for transmitting the rotation by the driving means to other conveyance rollers, which is provided at the end parts of the conveyance rollers in a rotation axis direction.

Description

  The present invention relates to a rice transplanter provided with a transfer device for transferring a seedling tray on which a preliminary seedling has been grown using a driving means such as an electric motor.

  Conventionally, a rice transplanter equipped with a folding seedling transport device that transports a seedling tray from the front of the machine to the rear of the machine in order to reduce the labor of supplying spare seedlings to the rice transplanter in the field from the shore. Are known. The seedling transport device is configured by connecting a plurality of conveyors each composed of a pair of left and right frames and a transport roller for transporting seedlings disposed between the frames by a connecting rod (see, for example, Patent Document 1).

  In the rice transplanter, if the seedlings have been planted and there are fewer seedlings to be planted, it is necessary to replenish the seedlings. . In a rice transplanter equipped with a seedling transporting device, the work assistant places the seedling tray on the seedling transporting device from the edge, transports the seedling tray from the front of the machine to the rear of the machine using the seedling transporting device, and the operator Seedling work was done at the rear of the aircraft.

JP 2008-18974 A JP 2009-65941 A JP 2009-232791 A

  The seedling conveying device conveys a seedling tray on which a preliminary seedling is grown from the front part of the rice transplanter to the rear part of the machine. Among such seedling conveying devices, there is one that conveys a seedling tray using the power of a conveyor drive motor (see, for example, Patent Documents 2 and 3).

  The seedling conveying devices disclosed in Patent Documents 2 and 3 include a driving pulley that is driven to rotate by a conveyor drive motor, a driven pulley that rotates following the driving pulley, and a driving belt and a conveying belt that is stretched around the driven pulley. Therefore, it is possible to convey the seedling tray on the conveyor belt without the intervention of a work assistant.

  However, in Patent Documents 2 and 3, the seedling transport device only has a transport section using a transport belt in a part of all sections in which the seedling tray is transported, and at least reaches a section transported by the transport belt. In the meantime, it was necessary to transport the seedling tray by the hand of the work assistant. In addition, since the seedling conveying devices of Patent Documents 2 and 3 are configured to be foldable by making the front and rear conveying stands movable, the conveying belt stretched and suspended by the driving pulley and the driven pulley is used as the seedling. It is difficult to arrange in the entire section from the front end to the rear end of the transport device.

  This invention is made | formed in view of such a situation, and it aims at providing the rice transplanter which can convey a seedling tray, without intermediating a work assistant's hand.

  The rice transplanter according to the present invention is located in the rear part of the traveling machine body, a planting part for planting seedlings, and a seedling tray for reserve seedlings in the transport direction in order to transport the seedling tray for spare seedlings in the front-rear direction of the traveling machine body. And a rice transplanter provided with a conveying device having a plurality of conveying rollers provided at appropriate intervals in the rice transplanter, wherein at least a part of the plurality of conveying rollers is driven to rotate in the forward or reverse direction with respect to the conveying direction. And a transmission mechanism that is provided at an end portion in the rotation axis direction of the transport roller and transmits the rotation of the drive unit to another transport roller.

  In the present invention, the transmission mechanism provided at the shaft end of the transport roller is configured to transmit the rotation by the driving means to the transport rotor, so that the transmission mechanism can be easily arranged and maintenance can be easily performed.

  In the rice transplanter according to the present invention, the transmission mechanism includes a driving pulley attached to a rotating shaft end portion of a conveying roller that is driven to rotate by the driving means, and a driven pulley attached to a rotating shaft end portion of the conveying roller. And a belt suspended from the drive pulley and the driven pulley.

  In this invention, the freedom degree of arrangement | positioning of a drive pulley and a driven pulley increases, and selection of an efficient drive method is attained.

  In the rice transplanter according to the present invention, the transmission mechanism includes a drive sprocket attached to a rotating shaft end portion of a conveying roller that is driven to rotate by the driving means and a driven sprocket attached to a rotating shaft end portion of the other conveying roller. A sprocket and a chain suspended from the drive sprocket and the driven sprocket are provided.

  In this invention, the freedom degree of arrangement | positioning of a drive sprocket and a driven sprocket increases, and selection of an efficient drive method is attained.

  In the rice transplanter according to the present invention, the transmission mechanism includes a drive gear attached to a rotating shaft end portion of a conveying roller that is driven to rotate by the driving unit, and a driven gear attached to a rotating shaft end portion of the other conveying roller. It is a gear train including gears.

  In this invention, the freedom degree of arrangement | positioning of a drive gear and a driven gear increases, and selection of an efficient drive method is attained.

  The rice transplanter according to the present invention is characterized in that the driving means is provided in the inside of the conveying roller to be rotated or at the end of the rotating shaft.

  In the present invention, space can be saved by providing the driving means inside the transport roller. In addition, by providing the driving means at the end of the rotation shaft of the transport roller, variations are widened in the arrangement positions of the driving means, and it is possible to arrange in consideration of space constraints.

  In the rice transplanter according to the present invention, the transport device includes a plurality of transport units that are foldably connected to a rotation shaft that is arranged in parallel with a rotation axis direction of the transport roller, and the plurality of transport units. An idler is provided at the rotation fulcrum.

  In the present invention, even when one transport unit is rotated with respect to another transport unit, the path length in the transmission path of rotation by the transmission mechanism does not change, so an additional component such as a transmission clutch is used. The rotation can be transmitted without any trouble.

  The rice transplanter according to the present invention includes a support that supports the transport device so as to be tiltable in the front-rear direction of the traveling machine body with a rotation shaft arranged in parallel with the rotation axis direction of the transport roller, and the transport A drive idler is provided at the rotation fulcrum of the apparatus.

  In the present invention, even if the entire conveying apparatus is tilted in the front-rear direction, the path length in the rotation transmission path by the transmission mechanism does not change, so that rotation is transmitted without using additional components such as a transmission clutch. be able to.

  When the rice transplanter according to the present invention detects that the seedling tray to be transported is placed on the transport roller, and the detection means detects that the seedling tray is placed, And a control means for starting rotation driving of the conveying roller by the driving means.

  In the present invention, when the seedling tray is placed on the transport roller, the transport is automatically started.

  The rice transplanter according to the present invention is characterized in that the transport device has a support frame that rotatably supports both ends of each transport roller, and the detection means is provided on an inner side surface of the support frame. .

  In the present invention, since the detecting means is provided on the inner side surface of the support frame, it is not easily affected by the weight of the transported object such as a seedling tray or dirt.

  In the case of the present invention, the transmission mechanism provided at the shaft end of the conveyance roller is configured to transmit the rotation by the driving means to the conveyance rotor, so that the transmission mechanism can be easily arranged and maintenance can be easily performed. Is possible.

It is a side view which shows the rice transplanter which concerns on Embodiment 1. FIG. It is a perspective view which shows a conveying apparatus. It is a figure which shows the conveying apparatus of the state which rotated the front conveyance stand. It is a figure which shows the conveying apparatus of the state which folded the front conveyance stand and the back conveyance stand. It is typical sectional drawing explaining the structure of a start switch. It is typical sectional drawing explaining the structure of a stop switch. It is a block diagram which shows the structure of the control system of a conveyance motor. It is a side view which shows the rice transplanter which concerns on Embodiment 2. FIG.

Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
Embodiment 1 FIG.
1 is a side view showing a rice transplanter according to Embodiment 1. FIG. The rice transplanter according to the present embodiment is, for example, a riding rice transplanter, and is located at the rear of the traveling machine body 10, the traveling machine body 10, and a planting unit 30 for planting seedlings, and a seedling tray 4 ( A transport device 60 for transporting the traveling machine body 10 from the front part to the rear part is provided.

  The traveling machine body 10 includes a vehicle body frame 11, and an engine 14 is mounted on the front upper side of the vehicle body frame 11. A front axle case (not shown) that houses a transmission mechanism that transmits the driving force of the engine 14 and a suspension is provided below the front portion of the vehicle body frame 11, and the front wheels 12 are supported by the front axle case. Yes. A rear axle case (not shown) that houses a transmission mechanism and a clutch for transmitting the driving force of the engine 14 is provided below the rear portion of the traveling machine body 10, and a rear wheel 13 is mounted on the rear axle case. It is supported. The rice transplanter is configured to travel the traveling machine body 10 by transmitting the driving force of the engine 14 to the rear wheels 13 via a transmission mechanism.

  The engine 14 is covered with a bonnet 15. On both the left and right sides of the bonnet 15, preliminary seedling platforms 50, 50 for placing the seedling raising tray 4 on which the preliminary seedlings to be supplied to the planting unit 30 are placed are arranged in parallel in the vertical direction. A dashboard 21 is provided at the rear of the bonnet 15, and a steering handle 22 for steering the rice transplanter is disposed on the upper side of the dashboard 21. In addition, a driver's seat 23 is provided on the rear side of the steering handle 22, and a fertilizer is disposed further on the rear side of the driver's seat 23.

  The planting part 30 is connected to the rear part of the traveling machine body 10 via a lifting link mechanism 39. The planting part 30 is arranged in the vicinity of the lower end part of the eight seedling mounts 31 that are elongated vertically and arranged in the left-right direction, and has a planting claw 34 for planting seedlings. And a float 36 that prevents the planting part 30 from sinking to the left and right of the lower end part of the seedling mount 31. The seedling mounting table 31 is a mounting table for mounting mat-shaped seedlings, and is arranged in front and rear with respect to the traveling machine body 10 and is slidable in the left-right direction by a lateral feed mechanism not shown in the drawing. It is supported by. Note that the number of seedling platforms 31 is not limited to eight, and may be six or four, for example.

  In the rice transplanter having such a configuration, the seedling mounting table 31 is slid in the left-right direction along with the forward traveling by the power of the engine 14, and the rotary case 35 is driven to rotate in each row, so that the planting claw 34 shares one stock. While scraping off the seedlings from the seedling mount 31, the planting operation can be performed continuously.

  As the seedling planting operation proceeds, the seedlings on the seedling table 31 are planted and reduced in the field. Therefore, in order to continue the planting operation, it is necessary to replenish the seedlings appropriately. For example, when the seedlings remaining on the seedling table 31 are low (when the number of seedlings has decreased by a predetermined amount or more), or when the rice transplanter reaches the shoreline, the seedling table 31 is supplemented with seedlings. I do.

  The rice transplanter according to the present embodiment includes two stages of preliminary seedling platforms 50 and 50 at the front of the traveling machine body 10. The preliminary seedling mounts 50 and 50 are rotated upward with the two pillars 51 and 51 erected on the vehicle body frame 11 spaced apart in the front-rear direction and projecting outward from the machine body. Cantilevered so that it can move. For this reason, when the rice transplanter is stored, the spare seedling platforms 50 and 50 are respectively rotated upward to be stored compactly. In the example shown in FIG. 1, the number of stages of the preliminary seedling stage 50 is two, but is not limited to two, and the number of stages of the preliminary seedling stage 50 may be three or more. Further, the number of stages of the reserve seedling stage 50 on the installation side of the transfer device 60 (left side of the rice transplanter in the example shown in FIG. 1) may be two, and the number of stages of the preliminary seedling stage 50 may be three on the non-installation side. Good.

  In addition, the rice transplanter according to the present embodiment includes a transport device 60 that transports the seedling raising tray 4 on which the spare seedlings are grown from the front part to the rear part of the traveling machine body 10. The seedling tray 4 is formed of, for example, a synthetic resin, and is a shallow tray in which a peripheral wall 41 having a height of about 30 mm is provided on the periphery of a rectangular bottom plate 40 having a size of about 580 mm × 280 mm (see FIG. 5). The seedling tray 4 is filled with culture soil to form a culture medium layer, and after absorbing water, seed pods are sown and covered with soil. The seed buds germinate in the cover soil and grow as seedlings.

  The conveyance device 60 conveys the seedling tray 4 placed on the preliminary seedling placement stand 50 or the seedling tray 4 delivered from the work assistant at the time of dredging from the front part to the rear part of the traveling machine body 10. The operator takes out the seedling from the seedling tray 4 that has been transported to the rear part of the traveling machine body 10 by the transport device 60 and replenishes the seedling mount 31 to perform the seeding work.

  The transfer device 60 is configured by connecting a plurality of transfer tables 61, and includes a fixed transfer table 61b, a front transfer table 61a positioned in front of the fixed transfer table 61b, and a rear transfer table 61c positioned behind the fixed transfer table 61b. Is provided. The front transfer table 61a and the rear transfer table 61c are rotatably connected to the fixed transfer table 61b. When the rice transplanter is stored, the front transfer table 61a and the rear transfer table 61c are rotated upward. Thus, the transport device 60 can be folded in a compact manner.

  The transport device 60 is supported by, for example, two support columns 51 and 51 and an auxiliary support column 52. The auxiliary support column 52 has a lower end fixed to a mounting bracket 53 fixed so as to protrude from the body frame 11 in the vicinity of the front support column 51 to the outside of the machine body. The upper side of the two support columns 51, 51 is fixed to a bracket 67 on the airframe side fixed to the lower part of the fixed transport table 61b, and the upper side of the auxiliary support column 52 is fixed to the lower part of the fixed transport table 61b. Fixed to the outer bracket 67. For example, the bracket 67 is formed in a substantially triangular shape when viewed from the side of the front and rear, and is configured such that the entire transport device 60 is inclined to the front and rear and low.

  2 is a perspective view showing the transfer device 60, FIG. 3 is a view showing the transfer device 60 in a state in which the front transfer table 61a is rotated, and FIG. 4 shows transfer in a state where the front transfer table 61a and the rear transfer table 61c are folded. FIG. The transfer device 60 is configured by connecting a plurality of transfer tables 61. Each transport base 61 includes a pair of left and right frames 62, 62, a pair of front and rear frames 63, 63, and a plurality of transport rollers 64, 64, ..., 64 provided at appropriate intervals in the transport direction of the seedling tray 4. Is provided.

  Front and rear frames 63 and 63 each including a horizontal portion 63a and a vertical portion 63b are horizontally provided at both ends of a pair of left and right left and right frames 62 and 62 formed long in the front and rear direction. The rod-shaped transport rollers 64 with which the bottom surface of the seedling raising tray 4 for the preliminary seedling comes into contact are appropriately spaced in the front-rear direction, and are rotatably provided on the opposing inner surfaces of the left and right frames 62, 62. The conveyance roller 64 includes left and right rolling portions 64a and 64a, and a constricted portion 64b that is formed to have a smaller diameter than the rolling portion 64a and is provided at substantially the left and right centers.

  In addition, instead of providing the constricted portion 64b, the conveying roller 64 can be separated into left and right so that only the space or the roller support shaft exists in the central portion. Moreover, the surface of the rolling part 64a is made of rubber, or the rolling part 64a is a star wheel, thereby eliminating slippage between the bottom surface of the seedling tray 4 and the rolling part 64a, and more reliable conveyance. It is good also as composition which performs operation.

  A rod-shaped reinforcing frame 66 is disposed between the conveyance rollers 64 and 64 at the approximate center of the left and right frames 62 and 62. The upper surface of the reinforcing frame 66 is disposed at a position that is substantially the same height as the upper surface of the constricted portion 64b of the transport roller 64 or a position that is lower than the upper surface of the constricted portion 64b.

A conveyance guide 65 is provided at substantially the center of the two left and right frames 62, 62 provided in the front conveyance table 61a, so that the seedling tray 4 does not enter between the conveyance rollers 64, 64 when supplementary seedlings are supplied (loaded). I have to. The conveyance guide 65 is formed of, for example, a linear bar, and the upper surface thereof is disposed at a position lower than the upper surface of the rolling part 64a, and both ends are fixed to the horizontal parts 63a and 63a of the front and rear frames 63 and 63. Has been.
In the present embodiment, the conveyance guide 65 is formed of a bar material, but may be a shape such as a plate material or a square material.

  In addition, plate-like brackets 71 are fixedly provided on the inner sides of the rear ends of the left and right frames 62, 62 of the front transport base 61a so as to protrude upward. The fixed conveyance table 61b connected to the front conveyance table 61a is fixedly provided inside the front ends of the left and right frames 62 and 62 so that the plate-like brackets 72 protrude upward. The upper rear end of the bracket 71 and the upper front end of the bracket 72 are formed so as to overlap in the left-right direction of the airframe, and an opening is provided in both of the overlapping portions, and the rotating shaft 75 is inserted into the opening. Has been. The front conveyance table 61a is rotatably connected to the fixed conveyance table 61b with the rotation shaft 75 as a rotation center.

  On the other hand, plate-like brackets 73 are fixedly provided on the inner sides of the rear ends of the left and right frames 62, 62 of the fixed carrier 61b so as to protrude upward. The rear transfer table 61c connected to the fixed transfer table 61b is fixed inside the front ends of the left and right frames 62, 62 so that plate-like brackets 74 protrude upward. The upper rear end of the bracket 73 and the upper front end of the bracket 74 are formed so as to overlap in the left-right direction of the airframe, and an opening is provided in both of the overlapping portions, and the rotation shaft 76 is inserted into the opening. Has been. The rear transfer table 61c is rotatably connected to the fixed transfer table 61b with the rotation shaft 76 as a rotation center.

  The front brackets 71 and 72 are configured to protrude higher than the rear brackets 73 and 74, and when the front conveyance table 61 a and the rear conveyance table 61 c of the conveyance device 60 are folded, each conveyance table 61 is arranged. Is configured not to touch. That is, when the transfer device 60 is folded, the rear transfer table 61c is accommodated above the fixed transfer table 61b, and the front transfer table 61a is accommodated above the fixed transfer table 61b with a space in the vertical direction.

  In the present embodiment, both the front conveyance table 61a and the rear conveyance table 61c are rotated upward, and the fixed conveyance table 61b, the rear conveyance table 61c, and the front conveyance table 61a are arranged from the bottom as shown in FIG. In this configuration, the front transport table 61a is rotated upward and the rear transport table 61c is rotated downward. When stored, the rear transport table 61c, the fixed transport table 61b, and the front You may comprise so that it may be accommodated so that it may become the order of the conveyance stand 61a.

  The rice transplanter according to the present embodiment includes a transport motor 80 that rotationally drives at least a part of the transport rollers 64, 64,... Provided in the transport device 60 in the forward direction with respect to the transport direction of the seedling tray 4, and the transport motor. And a transmission mechanism for transmitting the rotation of 80 to the other conveying rollers 64, 64,. In the example shown in FIG. 2, among the five transport rollers 64, 64,... Provided in the fixed transport table 61 b, the rearmost transport roller 64 is rotationally driven by the transport motor 80.

  The conveyance motor 80 is an electric motor, for example, and is installed below the fixed conveyance table 61b. The conveyance motor 80 includes an output shaft 80a that is parallel to the rotation axis of the conveyance roller 64, and a drive pulley 81 is fitted and fixed to the output shaft 80a. A driven pulley 82 is fitted and fixed to the shaft end portion of the rotation shaft of the conveying roller 64 that is driven to rotate by the conveying motor 80, and the driven pulley 82 and the driving pulley 81 are stretched between them. They are connected by a transmission belt 83.

  The rotation of the conveyance motor 80 is transmitted to the conveyance roller 64 through the driving pulley 81, the transmission belt 83, and the driven pulley 82, and the conveyance roller 64 is rotated. The drive pulley 81 and the driven pulley 82 are toothed pulleys having teeth on the outer periphery, and the transmission belt 83 is a toothed belt having teeth on the inner surface, so that the rotation of the transport motor 80 is not accompanied by slipping. This can be transmitted to the conveying roller 64 so that a more reliable conveying operation can be performed.

  In addition, the transport device 60 includes a transmission mechanism that transmits the rotation of the transport motor 80 transmitted to the rearmost transport roller 64 of the fixed transport table 61b to the other transport rollers 64, 64,. The transmission mechanism includes a first transmission mechanism 810 that transmits the rotation of the conveyance motor 80 to each conveyance roller 64 of the fixed conveyance table 61b, and a second transmission mechanism that transmits the first transmission mechanism 810 to the conveyance roller 64 of the front conveyance table 61a. 820 and a third transmission mechanism 830 that transmits to each conveyance roller 64 of the front conveyance table 61a.

  The first transmission mechanism 810 includes an interlocking pulley 811 fitted and fixed coaxially with the driven pulley 82 of the rotation shaft of the conveyance roller 64 at the rearmost position of the fixed conveyance table 61b, and the conveyance roller 64 at the most front position of the fixed conveyance table 61b. A driven pulley 812 fitted and fixed to the shaft end of the rotating shaft, and a transmission belt 813 stretched between the interlocking pulley 811 and the driven pulley 812. The rotation of the transport motor 80 transmitted to the driven pulley 82 is transferred to the frontmost transport roller 64 and the rearmost transport roller 64 of the fixed transport table 61b via the interlocking pulley 811, the transmission belt 813, and the driven pulley 812. Then, the conveying rollers 64 and 64 are rotated. In addition, interlocking pulleys 814, 814, and 814 are provided at the rotation shaft end portions of the transport rollers 64, 64, and 64 disposed in the intermediate portion of the fixed transport table 61b, respectively, and these transport rollers 64, 64, and 64 are transmitted. It is configured to rotate through a belt 813.

  The second transmission mechanism 820 includes a rear transmission mechanism 820a and a front transmission mechanism 820b that are rotatably connected to the rotation shaft 75. The rear transmission mechanism 820a includes an interlocking pulley 821 that is fitted and fixed coaxially with the driven pulley 812 of the conveyance roller 64 at the frontmost position of the fixed conveyance table 61b, and a driven pulley that is fitted and fixed to the rotating shaft 75. 822 and a transmission belt 823 stretched between the interlocking pulley 821 and the driven pulley 822. Further, the front transmission mechanism 820b is provided at the shaft end of the rotation shaft of the interlocking pulley 824 that is fitted and fixed coaxially with the driven pulley 822 of the rotation shaft 75 and the conveyance roller 64 that is the rearmost of the front conveyance table 61a. A driven pulley 825 fitted and fixed, and a transmission belt 826 stretched between the interlocking pulley 824 and the driven pulley 825 are provided. The rear transmission mechanism 820a and the front transmission mechanism 820b transmit the rotation of the conveyance motor 80 transmitted from the first transmission mechanism 810 to the conveyance roller 64 of the front conveyance table 61a via the transmission belts 823, 826 and the like.

  The third transmission mechanism 830 includes an interlocking pulley 831 that is fitted and fixed coaxially with the driven pulley 825 of the rotation roller of the conveyance roller 64 closest to the front conveyance table 61a, and the conveyance roller 64 that is closest to the front conveyance table 61a. A driven pulley 832 that is fitted and fixed to the shaft end of the rotating shaft, and a transmission belt 833 that is stretched between the interlocking pulley 831 and the driven pulley 832. The rotation of the conveyance motor 80 transmitted via the second transmission mechanism 820 is caused by the most forward conveyance roller 64 and the most rearmost rotation of the front conveyance table 61a via the interlocking pulley 831, the transmission belt 833, and the driven pulley 832. It is transmitted to the conveyance roller 64, and these conveyance rollers 64 and 64 are rotated. In addition, interlocking pulleys 834, 834, and 834 are provided at the rotation shaft end portions of the transport rollers 64, 64, and 64 disposed in the intermediate portion of the front transport table 61a, respectively, and these transport rollers 64, 64, and 64 are transmitted. It is configured to rotate through a belt 833.

  The two pulleys provided at the rotation fulcrum (rotation shaft 75) of the front transport table 61a are configured to function as idlers. That is, even when the front conveyance table 61a is rotated with respect to the fixed conveyance table 61b, the path length in the transmission path of the second transmission mechanism 820 from the first transmission mechanism 810 to the third transmission mechanism 830 changes. Therefore, the third transmission mechanism 830 that rotates the conveyance roller 64 of the front conveyance table 61a from the first transmission mechanism 810 that rotates the conveyance roller 64 of the fixed conveyance table 61b without using an additional component such as a transmission clutch. The rotation of the transport motor 80 can be transmitted to the head.

In the present embodiment, a belt transmission mechanism including a pulley and a belt is employed as a transmission mechanism that transmits the rotation of the conveyance motor 80 to the conveyance roller 64. However, a chain transmission mechanism including a sprocket and a chain may be used. Good. For example, instead of the drive pulley 81 fitted and fixed to the output shaft 80a of the conveyance motor 80, a driven sprocket and a driven pulley 82 fitted and fixed to the rotation shaft of the conveyance roller 64 at the rearmost position of the fixed conveyance table 61b are substituted. Instead of the driven sprocket and the transmission belt 83, a chain transmission mechanism provided with a chain stretched around the drive sprocket and the driven sprocket may be used. The same applies to the first transmission mechanism 810 to the third transmission mechanism 830, and a chain transmission mechanism in which the pulley is replaced with a sprocket and the transmission belt is replaced with a chain may be used.
Further, the transmission mechanism for transmitting the rotation of the conveyance motor 80 to the conveyance roller 64 is not limited to the belt transmission mechanism and the chain transmission mechanism described above, and other transmission mechanisms such as a gear transmission mechanism such as a gear train may be adopted. Of course.

  In the present embodiment, the rotation of the conveyance motor 80 is transmitted to all the conveyance rollers 64, 64,... Provided in the front conveyance table 61a and the fixed conveyance table 61b, but the conveyance rollers 64, 64,. Among them, the rotation of the conveyance motor 80 may be transmitted only to some of the conveyance rollers 64, 64,. Furthermore, it is good also as a structure which transmits rotation of the conveyance motor 80 to the conveyance rollers 64 and 64 with which the rear conveyance stand 61c is provided.

  Further, in the present embodiment, the transport rollers 64, 64,... Are rotated by the transport motor 80 installed below the fixed transport table 61b. For example, the conveyance motor 80 may be provided in the vicinity of the shaft end of the conveyance roller 64 at the rearmost position of the fixed conveyance table 61b. Moreover, it is good also as a structure which provides a wheel-in motor in the rotating shaft of at least one part of the conveyance rollers 64,64, ... with which each conveyance stand 61 is provided.

  Furthermore, the transport device 60 includes a start switch 101 that starts driving the transport motor 80 and a stop switch 102 that stops driving the transport motor 80. As shown in FIG. 2, the start switch 101 is provided at a position closer to the front side of the inner side surface of the left and right frames 62 of the front conveyance table 61a, and the stop switch 102 is arranged on the inner side surface of the left and right frames 62 of the rear conveyance table 61c. It is provided at the rear position.

  FIG. 5 is a schematic cross-sectional view illustrating the configuration of the start switch 101. 5A and 5B are cross-sectional views of the transfer device 60 as viewed from the front. The start switch 101 is, for example, a switch having both a vertical cross section and a horizontal cross section that are trapezoidal. The top 101a protrudes outward from the inner side surfaces of the left and right frames 62 by the action of a biasing member 101s such as a spring. (See FIG. 5A).

  When the seedling tray 4 is placed on the front transport table 61a (that is, when transport is started), the bottom plate 40 of the seedling tray 4 comes into contact with the upper slope 101b of the start switch 101, and the start switch 101 is connected to the left and right frames 62. Slide inside. When the seedling tray 4 is placed on the transport roller 64, as shown in FIG. 5B, the top portion 101a of the start switch 101 is in contact with the peripheral wall 41 of the seedling tray 4, and the start switch 101 is in the left and right frame 62. Evacuate inside. This state is detected by the detection circuit 105 (see FIG. 7) as a closed state (or open state) of an electrical contact not shown in the drawing. When the detection circuit 105 detects the closed state (or open state) of the electrical contact, the detection circuit 105 sends a drive start signal for the transport motor 80 to the control unit 100 (see FIG. 7).

  FIG. 6 is a schematic cross-sectional view illustrating the configuration of the stop switch 102. 6A and 6B are cross-sectional views of the transfer device 60 as viewed from above. The stop switch 102 is, for example, a switch whose vertical and horizontal cross sections are trapezoidal, and the top 102a protrudes outward from the inner side surfaces of the left and right frames 62 by the action of an urging member 102s such as a spring. (See FIG. 6A).

  When the seedling tray 4 has been transported to the rear transport platform 61 c, the peripheral wall 41 of the seedling tray 4 contacts the front slope 102 c of the stop switch 102, and the stop switch 102 slides into the left and right frames 62. When the seedling tray 4 is conveyed to the rear end of the rear conveying table 61c, the top portion 101a of the stop switch 102 is in contact with the peripheral wall 41 of the seedling tray 4, and the stop switch 102 is retracted into the left and right frames 62. . This state is detected by the detection circuit 105 as a closed state (or open state) of an electrical contact (not shown). When the detection circuit 105 detects the closed state (or open state) of the electrical contact, the detection circuit 105 sends a drive stop signal for the transport motor 80 to the control unit 100.

  FIG. 7 is a block diagram showing the configuration of the control system of the transport motor 80. The transport device 60 includes a detection circuit 105 to which the above-described start switch 101 and stop switch 102 are connected, and a control unit 100. The control unit 100 includes, for example, a CPU and a memory. When a driving start signal for the conveyance motor 80 is input from the detection circuit 105, the control unit 100 gives a driving start signal to the conveyance motor 80 to drive the conveyance motor 80. When a stop signal of the transport motor 80 is input, a drive stop signal is given to the transport motor 80 to stop the transport motor 80.

  In the present embodiment, the feeding direction of the seedling tray 4 is set from the front part to the rear part of the traveling machine body 10, but a changeover switch for switching the rotation direction of the carry motor 80 is connected to the control unit 100, and the carry motor is operated by the changeover switch. By switching the rotation direction of 80, the conveyance direction of the conveyance device 60 may be changed. When the seedling joining operation is performed at the rear part of the traveling machine body 10 and the replenishment of seedlings on the seedling mounting table 31 is completed, the traveling seedling tray 4 that has become an empty box by changing the transportation direction by the transportation device 60 is used as the traveling body body 10. Can be transported to the front part of the vehicle, and can be collected by an auxiliary worker at the shore.

  Further, when detecting the ON state of the stop switch 102 without detecting the ON state of the start switch 101, the detection circuit 105 sends a drive start signal for rotating the transport motor 80 in the reverse direction to the control unit 100. When detecting the ON state of the start switch 101 after detecting the ON state of the stop switch 102, the detection circuit 105 may be configured to send a drive stop signal for stopping the driving of the transport motor 80 to the control unit 100. At this time, the stop switch 102 functions as a switch for controlling the start of driving when the seedling tray 4 is transported from the rear to the front of the transport device 60, and the start switch 101 functions as a switch for stopping the drive. become.

  Further, in the present embodiment, a start switch 101 for starting the conveyance motor 80 is provided on the inner side surface of the left and right frame 62 in the front conveyance table 61a, and the conveyance motor 80 is stopped on the inner side surface of the left and right frame 62 in the rear conveyance table 61c. Although the stop switch 102 is provided, the installation location of these switches is not limited to the transport table 61. For example, the structure provided with the controller provided with these switches in the back side of the driver's seat 23 may be sufficient.

  Moreover, in this Embodiment, it was set as the structure provided with the start switch 101 and the stop switch 102 which are pressed by the seedling raising tray 4, However, It is not limited to a push-type switch, For example, a light emission part and a light-receiving part are used. It is good also as a structure which detects the timing which starts conveyance and the timing which stops conveyance in the control part 100 using the combined optical sensor. For example, when the light receiving unit detects the light emitted by the light emitting unit at a position closer to the front of the front transport table 61a, and the light emitted from the light emitting unit is blocked by the seedling tray 4, the control unit 100 It can be detected that it is time to start the conveyance. Similarly, when the light receiving unit detects light emitted from the light emitting unit at a position behind the rear transport table 61c, and the light emitted from the light emitting unit is blocked by the nursery tray 4 that has been transported, The control unit 100 can detect that it is the timing to stop the conveyance.

  Furthermore, in the present embodiment, the start switch 101 and the stop switch 102 are provided. However, only the start switch 101 is provided, and the transport motor 80 is stopped after a predetermined time has elapsed after the transport motor 80 is started. It is good.

  As described above, in the present embodiment, the first transmission mechanism 810 to the third transmission mechanism provided at the shaft end portion of the conveyance roller 64 by rotating the conveyance motor 80 that rotationally drives the conveyance roller 64 included in the conveyance device 60. Since it is set as the structure transmitted by 830, it has the side surface that a transmission mechanism can be arrange | positioned easily and maintenance can be implemented easily.

  In the present embodiment, an idler is provided at the rotation fulcrum (rotation shaft 75) of the front conveyance table 61a, and the front conveyance table 61a is rotated with respect to the fixed conveyance table 61b. The path length in the transmission path of the second transmission mechanism 820 from the first transmission mechanism 810 to the third transmission mechanism 830 does not change. Therefore, the third transmission mechanism 830 that rotates the conveyance roller 64 of the front conveyance table 61a from the first transmission mechanism 810 that rotates the conveyance roller 64 of the fixed conveyance table 61b without using an additional component such as a transmission clutch. The rotation of the transport motor 80 can be transmitted to the head.

  In this embodiment, since the start switch 101 and the stop switch 102 of the transport motor 80 are provided on the inner side surfaces of the left and right frames 62, the weight of the transport object such as the seedling tray 4 and dirt are hardly affected. Further, since the on / off of the transport motor 80 is controlled at the front end and the rear end in the transport direction, unnecessary transport can be avoided.

Embodiment 2. FIG.
In the first embodiment, the entire conveying device 60 is fixed to the support columns 51 and 51 via the bracket 67 so that the entire conveying device 60 is inclined to the front and rear. However, the conveying device 60 is supported to be rotatable in the vertical direction. It is good also as composition to do.
In the second embodiment, a configuration in which the transport device 60 is supported so as to be rotatable in the vertical direction will be described. In addition, the same code | symbol is attached | subjected about the structure similar to Embodiment 1 among the structures of the rice transplanter concerning Embodiment 2, and the detailed description shall be abbreviate | omitted.

  FIG. 8 is a side view showing a rice transplanter according to the second embodiment. The rice transplanter according to the second embodiment is, for example, a riding rice transplanter, and is provided with a traveling machine body 10, a planting part 30 for planting seedlings, and a seedling tray 4 on which spare seedlings are grown. A transport device 60 that transports the traveling machine body 10 from the front to the rear is provided.

  The conveyance device 60 is supported so as to be rotatable around a substantially horizontal rotation shaft 54 provided on the rear column 51 of the two columns 51, 51. Further, it is assumed that the most rearward transport roller 64 of the fixed transport base 61 b is rotatably supported by the left and right frames 62 and 62 around the rotation shaft 54.

  By setting it as said structure, an idler can be provided in the rotation fulcrum of the up-down direction of the conveying apparatus 60 whole. Therefore, even when the entire conveying device 60 is rotated in the vertical direction, the path length on the transmission path from the conveying motor 80 to the first transmission mechanism 810 does not change, and additional components such as a transmission clutch are used. The rotation of the conveyance motor 80 can be transmitted to the first transmission mechanism 810 to the third transmission mechanism 830 without using the motor.

  The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

60 Conveying device 64 Conveying roller 80 Conveying motor 81 Drive pulley 82 Driven pulley 83 Transmission belt 810 First transmission mechanism 820 Second transmission mechanism 830 Third transmission mechanism

Claims (9)

A traveling body, a planting part for planting seedlings, and a seedling tray for reserve seedling, which are located at the rear part of the traveling body, are provided at appropriate intervals in the transport direction so as to transport the seedling tray in the front-rear direction of the traveling body. In a rice transplanter equipped with a transport device having a plurality of transport rollers,
Drive means for rotationally driving at least a part of the plurality of transport rollers in the forward direction or the reverse direction with respect to the transport direction;
A rice transplanter, comprising: a transmission mechanism provided at an end of the conveyance roller in the rotation axis direction and transmitting the rotation of the driving unit to another conveyance roller. The transmission mechanism is
A driving pulley attached to a rotating shaft end of a conveying roller that is driven to rotate by the driving means;
A driven pulley attached to the end of the rotating shaft of the transport roller;
The rice transplanter according to claim 1, further comprising: a belt suspended from the drive pulley and the driven pulley. The transmission mechanism is
A drive sprocket attached to the end of the rotation shaft of the conveying roller that is driven by the drive means;
A driven sprocket attached to the rotating shaft end of the other transport roller;
The rice transplanter according to claim 1, further comprising: a chain suspended from the drive sprocket and the driven sprocket. The transmission mechanism is
The drive train is a gear train including a drive gear attached to a rotating shaft end portion of a conveying roller that is rotationally driven, and a driven gear attached to a rotating shaft end portion of the other conveying roller. Item 1. Rice transplanter according to item 1.   The rice transplanter according to any one of claims 1 to 4, wherein the driving means is provided in a conveyance roller to be rotationally driven or at a rotating shaft end. The transport device includes a plurality of transport units that are foldably connected to a rotation shaft that is arranged in parallel with a rotation shaft direction of the transport roller,
The rice transplanter according to any one of claims 1 to 5, wherein an idler is provided at a rotation fulcrum of the plurality of transfer units. A support that supports the transport device so as to be tiltable in the front-rear direction of the traveling machine body with a rotation shaft disposed in parallel with the rotation axis direction of the transport roller;
The rice transplanter according to any one of claims 1 to 6, wherein a driving idler is provided at a rotation fulcrum of the transport device. Detection means for detecting that the seedling tray to be transported is placed on the transport roller;
8. The apparatus according to claim 1, further comprising: a control unit that starts rotation of the conveyance roller by the driving unit when the detection unit detects that the seedling tray is placed. Rice transplanter as described in one. The transport device has a support frame that rotatably supports both ends of each transport roller;
9. The rice transplanter according to claim 8, wherein the detecting means is provided on an inner side surface of the support frame.

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