JP2000139141A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling transplanter, capable of simplifying a mechanism for carrying seedling trays for pot seedlings along a prescribed seedling tray- carrying route, facilitating the maintenance and improving the carrying accuracy. SOLUTION: A mechanism for carrying seedling trays T along a seedling tray-carrying route 31 is formed so as to be switched to a state for carrying a seedling tray T or to a state capable of taking out the seedling tray T. In the state for carrying a seedling tray T, the seedling tray T is carried by nipping a part of the seedling tray T with a pair of carrying rollers 60, 61 arranged in the direction crossing a seedling tray-carrying direction and then rotating and driving a pair of the carrying rollers 60, 61 in a prescribed direction. In the state capable of taking out the seedling tray T, the seedling tray T can be taken out from the seedling tray-carrying route 31 without nipping a part of the seedling tray T with a pair of the carrying rollers 60, 61.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling tray transport mechanism in a pot seedling transplanter.

[0002]

2. Description of the Related Art A seedling tray formed by connecting a plurality of pots for accommodating seedlings one by one is intermittently transported in a predetermined direction at a pot pitch along a predetermined seedling tray transport path. There is a seedling transplanter that takes out seedlings from a seedling tray at a location and transplants them to a field. Conventionally, this type of seedling transplanter
As a mechanism for transporting the seedling tray, a feed claw that can be engaged with a square hole for seedling tray feeding drilled at the same pitch as the pot pitch is provided along the seedling tray transport path at the left and right edge portions of the seedling tray. When the feed claw moves forward, it engages with the square hole and conveys the seedling tray by one pitch. When the feed claw returns, the engagement with the square hole is released and the next A claw-type transport mechanism was used to get over the square hole.

[0003]

The above-described claw-type transport mechanism is configured to mechanically drive a large number of driving parts including the feed claw, so that the structure is complicated, and it is necessary to adjust the amount of seedling tray to be fed or to adjust the number of seedling trays. Was difficult to maintain. In addition, since the number of parts is large and the overall weight is heavy, the frame must be rugged, and the total weight of the planting portion has been heavy. Furthermore, feed claws and other members engage with square holes in the seedling tray,
Since the movement of the seedling tray is regulated, it is not easy to take out the seedling tray from the seedling tray transport path at the end of work or the like.

[0004]

In order to solve the above problems, the present invention has the following arrangement. That is, the seedling transplanter according to the first invention intermittently conveys a seedling tray formed by connecting a plurality of pots for accommodating seedlings one by one along a predetermined seedling tray conveying path at a pot pitch intermittently. In a seedling transplanter that takes out seedlings from a seedling tray at a predetermined position in the seedling tray transport path and transplants the seedlings in a field, a mechanism for transporting the seedling tray along the seedling tray transport path intersects the seedling tray transport direction. A state in which a part of the seedling tray is pinched by a pair of transport rollers arranged side by side in a direction, and the pair of transport rollers are driven to rotate in a predetermined direction to transport the seedling tray,
The invention is characterized in that the seedling tray is configured to be switched to a state where the seedling tray can be taken out from the seedling tray transport path without pinching a part of the seedling tray by the pair of transport rollers.

In the seedling transplanter according to the second invention, a seedling tray formed by connecting a plurality of pots for accommodating seedlings one by one intermittently in a predetermined direction at a pot pitch along a predetermined seedling tray transport path. In a seedling transplanter that takes out seedlings from a seedling tray at a predetermined position on the seedling tray transfer path and transplants the seedlings to a field, a mechanism for transferring the seedling tray along the seedling tray transfer path is provided in a seedling tray transfer direction. A pair of transport rollers arranged side by side in a direction intersecting with the seedling tray are provided so as to sandwich a part of the seedling tray, and the seedling tray is transported in the fixed direction by rotating the pair of transport rollers in one direction. The seedling tray is taken out from the seedling tray transfer path by rotating the feeding roller in the reverse direction.

In the first and second aspects of the present invention, if the transport roller is driven by, for example, an electric motor, the rotation of the transport roller can be appropriately controlled, and the seedling tray can be transported accurately during operation. At the same time, the seedling tray can be easily removed from the seedling tray transport path at the end of the work.

When the transport roller is driven by a motor as described above, a detecting means for detecting the operation of the transport device for transporting the seedling tray is provided in the event of a failure in transporting the seedling tray due to a failure of the motor or the like. If the detecting means does not detect the operation of the transport device for a certain period of time or more, an alarm is output, or a detecting device for detecting the operation of the transport device for transporting the seedling tray is provided, and When the operation of the device is not detected for a certain period of time or more, the planting of the seedlings may be stopped.

In this case, it is preferable to change the detection interval of the detection means in accordance with one or both of the inter-strain distance and the working speed of the seedlings to be planted in the field, because the detection accuracy is improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment shown in the drawings will be described. In the seedling transplanter 1, a planting section 4 for 6-row planting is mounted on the rear side of the riding traveling vehicle body 2 via a link device 3 so as to be able to move up and down. 5 and a fertilizer feeding device 5b for feeding the fertilizer for each strip.
The seedling transplanter 1 is for planting paddy rice seedlings in a paddy field, but the present invention is not limited to this, and is also applicable to a seedling transplanter for planting vegetable seedlings in a field.

The traveling vehicle body 2 includes a pair of left and right steerable front wheels 6 and 6 that are driven and rotated, and a pair of right and left rear wheels 7 that are driven and rotated.
A transmission case 9 is provided on the front side of the main frame 8 and an engine E is provided on the rear side thereof. After the rotational power of the engine E is shifted by the transmission in the transmission case 9, the traveling power is transmitted to the front wheels 6, 6 and the rear wheels 7, and the external take-out power (PT
O) is transmitted to the planting section 4 and the fertilizer application device 5 via the planting clutch 10. A seat 11 is provided above the engine E, and a handle 12 for steering the front wheels 6 and 6 is provided in front of the seat 11. The periphery of the seat 11 is a horizontal step floor 14 on which an operator can move. In the drawing, reference numeral 15 denotes a spare seedling mounting table on which spare seedlings are placed, and reference numeral 16 denotes a drawing marker for drawing the course of the traveling vehicle body 2 in the next step to a field scene.

In the link device 3, an upper link 21, 21 and a lower link 22, 22 are rotatably mounted on a link base frame 20 fixed to the rear end of the main frame 8 of the traveling vehicle body 2. Connection frame 23 at rear end
Are connected. A rolling shaft 24 rotatably supported on the planting portion side is provided at a lower end portion of the connection frame 23.
Is inserted and connected. Thereby, the planting part 4 is mounted so as to be able to freely roll in the traveling direction. Further, a hydraulic cylinder 26 for driving the link device 3 is provided with the base side attached to the frame 8 and the piston rod side thereof is integrally fixed downward from the bases of the upper links 21 and 21 integrally. Is connected via a spring to the tip of the. When the hydraulic cylinder 26 expands and contracts, the upper and lower links 21, 22, 22 and 22 rotate around the support shaft on the link base frame 20 side, and the planting portion 4 is rotated.
Move up and down.

The planting section 4 has a six-row planting structure. Three sets of upper and lower two-stage seedling platforms 30, 30,... The seedling tray transport paths 31,... Are connected to the ends. Each seedling tray transport path 3
1 is a substantially U-shaped side view so that the seedling trays supplied one by one from the seedling mounting tables 30, 30 are conveyed downward in the first half, the conveyance direction is gradually changed in the middle, and the second half is conveyed upward. Is formed.

In correspondence with each seedling tray transport path 31, at the seedling extraction position P, a seedling extracting device 33 for extracting a seedling from the seedling tray by one horizontal row is drawn, and the extracted seedlings are drawn forward and downward in an arc. Seedling transport device 34 for transporting along such a locus,
Seedling removing device 35 for extracting seedlings from the seedling transfer device, seedling lateral feeding devices 36, 36 for laterally feeding the extracted one row of seedlings halfway to the left and right sides, and the seedling lateral feeding devices 36, 36.
Seedling devices 37, 37 for taking the seedlings conveyed by the plant and planting them in the field. That is, the seedling tray transport path 31, the seedling take-out device 33, the seedling transporting device 34, and the seedling removing device 35 constitute one set of two lines. At the exit of the seedling tray transport path 31, a collection case 38 for collecting empty seedling trays after the seedlings have been taken out at the seedling removal position P is detachably mounted.

The planting section frame supporting each of these devices is disposed inside the U-shape of the main frame 40 and the seedling tray transport paths 31, provided horizontally below the seedling tray transport paths 31,. ..., connecting frames 42, 4 for connecting adjacent seedling removing drive cases.
2. Upper and lower transmission frames 43, 43 for connecting the left and right end portions of the main frame 40 and the outer surface portions of the seedling removal drive cases 41, 41 at the left and right ends, and the main frame 40 and the connection frame 4.
, A seedling having a base fixed to the upper surface of a seedling removal drive case 41,... The supporting frames 46,..., The upper and lower transmission frames 43, 43 or the reinforcing frames 47,... Connecting the upper ends of the upper and lower frames 44, 44 to the rear ends of the planting transmission frames 45,. A U-shaped planting portion support bracket 48 fixed to the center front surface, and a pipe 4 integral with the planting portion support bracket.
8a and connecting plates 49, 49 connecting the inner flange portions of the connecting frames 42, 42. The rolling shaft 24 is rotatably inserted into a bearing case 50 provided at the left and right central portions of the planting portion support bracket 48, and supports the planting portion 4 in a freely rolling manner.

A center float 52 is provided below the planting section 4.
And a pair of left and right side floats 53, 53. During the planting operation, these floats slide while leveling the field scene. Each of the floats 52, 53, 53 is provided with a groove-forming device 54, which forms a groove for fertilization in a field scene near the seedling planting position of each line, and has a rear opening having a cross section in a plan view at the rear side. Are attached, and fertilizing hoses 5d for transferring the fertilizer fed from the fertilizer feeding device 5b are connected to each of the strips.

The center float 52 is also a sensor for detecting unevenness in the field scene. During the planting operation, the vertical movement of the front end of the center float 52 is detected by the vertical movement detecting mechanism 55, and the hydraulic cylinder is operated in accordance with the detection result. By switching the control valve 26 to raise and lower the planting section 4,
Always keep the seedling depth constant. Each of the floats 52, 53, 53 is attached to a float support arm 58,... Which rotates integrally with the planting depth adjusting shaft 57 in the left-right direction, and the float 52 is rotated by rotating the planting depth adjusting shaft 57. The height of the seedlings is adjusted by changing the installation height of the seedlings.

Next, the configuration of each section of the planting section 4 will be described. First, the seedling tray T will be described. The seedling transplanter 1 is a flexible seedling tray made of plastic. As shown in FIGS. 25 and 26, seedling pots 200,. They are arranged at a predetermined pitch in front, rear, left and right, and they are connected to each other on the opening side, and the bottom side has an independent structure. At the bottom of each of the pots 200,... Are formed cuts 201,. Flat edge 2 at the left and right ends along the longitudinal direction
02, 202 are formed. Further, a wide interval zone 203 in which the distance between the pots is large is provided in the longitudinal direction at the left and right (transverse direction) central portions. At the time of raising seedlings, the pots 200,... Are packed with floor soil, sowed and covered, and then germinated and greened under appropriate management.

The upper and lower two-stage seedling platforms 30, 30 have a space in which two seedling trays can be placed in series with the longitudinal direction thereof facing forward and backward. Seedling stand 3
The idle rollers 30a,...
The seedling tray slides backward on the seedling table. A pair of left and right supply rollers (not shown) are provided at the rear end of each seedling table 30 so as to sandwich the edge of the seedling tray from both sides. Then, the seedling tray is sent out to the seedling tray transport path 31, and when the driving is stopped, the seedling tray is held on the seedling mounting table. The seedling trays of the seedling mounting tables 30 and 30 are supplied one by one to the seedling tray transport path 31 by controlling a motor that rotationally drives the supply roller by a control device.

The seedling tray transport path 31 includes left and right transport guides 31a for guiding the edge portions 202 of the seedling tray T.
31a, and a central guide 31b that engages with the wide interval zone 203 of the seedling tray T. A pair of transport rollers for nipping the edge 202 of the seedling tray T from both sides (the upper surface of the seedling tray is set to the front) at positions on the right and left transport guides 31a near the upstream side of the seedling take-out position P in the transporting direction. 60 and 61 are provided. Back roller 60
Denotes a drive roller, which is rotated by an electric motor 62. The front roller 61 is a pressing roller, which is supported by a support arm 63 which is rotatable back and forth, and is urged forward by a spring 64. Therefore, in a normal state, as shown by a solid line in FIG. 7, the pair of transport rollers 60 and 61 are in a state where the pair of transport rollers 60 and 61 can transport the seedling tray with the edge of the seedling tray sandwiched therebetween. As shown by a dashed line in FIG. 7, when the spring 64 is moved beyond the dead center and the pressing roller 61 is rotated upward, the pair of transport rollers can take out the seedling tray without pinching the edge of the seedling tray. Become. These transport rollers 60, 6
For 1, it is desirable to take measures against non-slip such as using an elastic material such as rubber and providing a groove in the left and right direction on the outer peripheral portion.

The driving of the motor 62 is controlled by the controller 65 based on information from the seedling tray transport detecting limit switch SW1, the seedling pushing pin operation detecting limit switch SW2, and the like (see FIG. 16). The limit switch SW1 is provided on the back side (front side) of the seedling tray transport path 31. The limit switch SW1 is ON when the actuator urged rearward by a spring is engaged with the pot portion of the seedling tray. The state where the actuator is pushed to the bottom of the pot and turned forward is turned off. Therefore, each time the seedling tray is transported by one pitch, the limit switch SW
1 is switched ON / OFF. The limit switch SW2 is linked to the operation of the seedling removal device 33, and the state in which the seedling pushing pins 72,.
N, the state where the seedling pushing pins 72,... Are inserted into the pots 200,.

During normal operation, the control shown in the flowchart of FIG. 17 is performed, and when the limit switch SW2 is ON, that is, when the seedling push-out pin is out of the pot, the motor 62 is driven so as to convey the seedling tray by the pot pitch. I do. By repeating this, the seedling tray is intermittently conveyed by the pot pitch, and during the stop of the conveyance, the seedling push-out pin operates to take out the seedling from the pot.

When the limit switch SW1 is ON or OF
If the state of F continues for a predetermined time or longer, it is determined that the seedling tray has not been transported due to a failure of the motor 62, etc., and the planting clutch 10 is turned off, and an abnormality is detected with the ramp or buzzer 66. Inform. The predetermined time is
The setting value of the inter-strain setting dial 67 for setting the inter-strain distance of the seedlings to be planted so that the time matches the inter-strain distance of the seedlings to be planted and the working speed, and the external removal power (PT
It is calculated based on the detection value of the PTO rotation speed sensor 68 which detects the rotation speed of O).

When the seedling tray take-out switch 69 is turned on in a state where the seedling tray is not present on the seedling mounting tables 30, 30, the motor 62 can rotate in the reverse direction to rotate the seedling tray transport path. The seedling tray at 31 can be taken out. Whether or not the seedling trays 30, 30 have the seedling tray is determined by the state of the automatic supply switch 70 for controlling the drive of the automatic supply rollers of the seedling platforms 30, 30.

The seedling tray conveyance detecting means is not limited to the limit switch SW1, but may be a detecting means shown in FIGS. 20 and 21. A limit switch SW1 'shown in FIG.
Seedling tray T 'with holes pierced at the same interval as the pot pitch
When the seedling tray is conveyed by one pitch, the actuator is driven by the hole 204 for feeding.
To detect the conveyance of the seedling tray. The sensor SW1 ″ shown in FIG.
02, the roller is detected to detect the conveyance of the seedling tray.

The seedling take-out device 33 includes seedling push-out pins 72 arranged at equal pitches with respect to the horizontal pot of the seedling tray.
Are slide shafts 73 slidably supported in the front-rear direction.
73 are provided so as to operate integrally. As shown in FIG. 11 and FIG.
a is formed, and the fan-shaped pinion gear 74 meshes with the rack. Another sector gear 76 is attached to a gear shaft 75 to which the pinion gear 74 is attached. The sector gear 76 is provided with a gear portion 7 of a seedling removal operating arm 79 rotatably supported by a support shaft 78.
9a. A roller 80 is rotatably supported at an end of the seedling removal operating arm 79 opposite to the gear portion 79a, and the roller 80 is connected to the seedling removal drive case 41.
Is inserted into a guide groove 81a of a seedling removal cam 81 provided on a seedling removal cam shaft 65 penetrating the upper part of the seedling from left to right. The rotation of the seedling removal cam 81 causes the slide shafts 73, 73 to rotate.
Slides back and forth, and when the slide shaft slides rearward, the seedling pushing pins 72,... Are formed at the bottom of the pot with respect to the pot for one row in the horizontal direction of the seedling tray at the seedling removal position P. From the pot and push the seedlings backwards.

The seedling conveying device 34 includes seedling pushing pins 72,.
And a seedling holder 83 formed with a seedling holding portion having a concave shape as viewed from the rear, which communicates with the front and rear. Seedling holder 8
Reference numeral 3 denotes two upper and lower swing links 84, 85, 84, 8
The left and right ends are fixed to support members 86 connected to 5 and reciprocate in a circular locus by the swing of the swing link. The drive mechanism of the seedling transfer device fixes the rotation of the seedling removal cam shaft 65 to the upper and lower transmission frames 43, 43 via the arm 88, the telescopic rod 89, and the arm 90, as shown in FIGS. Is transmitted to the input shaft 92 of the seedling transporting transmission case 91 as a repetitive rotation motion, and a pair of transmission gears 9 are transmitted from the input shaft.
The base of the lower swing link 85 is configured to transmit the repetitive rotation motion to the seedling transport drive shaft 95, which is integrally attached thereto, via the bases 3 and 94.

By the repetitive rotation of the seedling transport drive shaft 95, the swing links 84, 85, 84, 85 swing up and down, and the seedling holder 83 reciprocates along an arc locus. When the seedling holder 83 is positioned at the upper end of the trajectory, the seedling holding unit receives one row of seedlings pushed out of the seedling tray by the seedling removal device 33, and the seedling holder moves to convey the received seedling to the lower front side. I do. When the swing links 84 and 85 move upward and the seedling holder 83 reaches the upper end of the trajectory, the lower swing link 85 hits the stopper 96 and stops. Arm 88
Still rotates to move the swing link 85 upward, but the rotation of the arm 88 is absorbed by the spring 89a interposed in the telescopic rod 89, and the swing link 85 is stopped by the stopper 96. Will remain. During this time, the seedling holder 83 is stopped at the upper end of the trajectory, so that the seedling removal device 33 reliably transfers the seedlings from the seedling tray to the seedling holder 83.

The seedling transfer drive shaft 95 is provided so as to extend between the left and right seedling transfer transmission cases 91, 91, and a total of four swing links 84, 85 are attached thereto. Then, as shown in FIG. 7, the support member 86 (O) connected to the left and right outer swing links and the support member 86 (I) connected to the inner swing link form a left and right set. The seedling holder is supported, and the center set of seedling holders is supported by support members 86 (I) and 86 (I) connected to the two inner swing links. Therefore, the seedling holders 83 of each unit have a structure in which adjacent seedling holders are connected via the support members 86 (I) and 86 (I).
... work together.

The seedling removing device 35, as shown in FIGS. 14 and 15, comprises a plate-like portion 100a which is long in the left-right direction, and a comb-like portion 100b which is suspended from the tip of the seedling hitting portion. A seedling hitting 100 is integrally attached to a left-right rotating seedling hitting mounting shaft 101 that is rotatably provided. A roller 103 is attached to a rotating arm 102 fixed to the left and right ends of the seedling hitting mounting shaft 101, and a spring is provided so that the roller comes into contact with a cam surface of a seedling hitting cam 105 attached to a seedling hitting cam shaft 104. Urges the rotating arm 102. As a result, when the seedling hitting cam 105 rotates, when the roller 103 fits into the concave portion of the cam, the seedling hitting 100 quickly rotates downward due to the tension of the spring, and operates immediately to return to the original position.

When the seedling holder 83 moves to the lower end of the movement locus, the comb-shaped portions 100b,... Of hitting the seedling relatively pass through the seedling holders of the seedling holder 83 back and forth, and are held by the seedling holders. Pull out the seedlings that are behind. Next, the seedling strike 100 rotates downward, and the plate-like portion 100
The seedlings from which a has been extracted are knocked down onto seedling feed belts 113 of the seedling lateral feeding devices 36, 36 described later. Comb 100
are formed by bending a wire into a U-shape.
For this reason, the contact area between the comb portion 100b and the seedling is small,
Since the two have weak adhesion to each other, the extracted seedlings can be reliably knocked down.

The seedling lateral feeder 36 includes a main frame 40.
A seedling feed belt 113 is wound around a drive roller 111 and a driven roller 112 attached to a seedling lateral feed drive shaft 110 protruding rearward from the rear end of the seedling feed belt 113. Two sets with one seedling tray transport path are provided symmetrically to move outward from the center. One row of seedlings N,... Removed by the seedling removing device 35 fall in an aligned state on the seedling feed belts 113 of the two sets of seedling lateral feeding devices, and receive the seedling feed belts. 113, 113 conveys the left and right half seedlings to the left and right sides, respectively. Seedling feed belt 11
The seedling N transported in 3 is dropped between a pair of planting guides 114 provided with an appropriate gap.

On the lower side of the seedling feed belt 113, a mud-dropping brush 115 having a hair-like body spirally planted with respect to the rotational axis in the front-rear direction is provided so as to slide on the surface of the seedling feed belt. Have been. The brush 115 is driven by power taken out from the shaft of the driven roller 112 via the gears G1, G2, G3, and rotates in a direction opposite to the seedling feeding belt 113. As the mud dropping brush 115 rotates, the mud adhering to the surface of the seedling feed belt 113 is rubbed off, sent backward by a spiral hair, and dropped at the rear end.

The seedling planting device 37 includes a planting transmission frame 45.
A pair of seedling implants 122, 122 are attached to a rotating case 121 that rotates integrally with a planting drive shaft 120 provided at the rear end of the plant, and the seedling implants 122, 122 move along a closed-loop tip trajectory. I do. Each seedling implantation tool 122 alternately takes the seedlings dropped between the planting guides 114, 114 one by one, and moves them between the planting guides 114, 114 to plant the seedlings in the field.

FIG. 9 is a diagram of the transmission mechanism of the planting section. The rotational power from the traveling vehicle body 2 is input to the planting section 4 from an input shaft 130 provided at a position slightly to the right of the left and right centers. The input shaft 130 is drivingly connected to a main transmission shaft 133 rotatably supported inside the main frame 40 via bevel gears 131 and 132. From this main transmission shaft 133,
It is transmitted to each seedling lateral feed drive shaft 110 provided orthogonally to this via bevel gears 135 and 136. The pair of seedling lateral feed drive shafts 110 of each set rotate in opposite directions to each other. In the planting transmission frame 45, a sprocket 137a attached to the main transmission shaft 133 is provided.
137b attached to the planting drive shaft 120
And a transmission chain 137 is provided, which transmits power from the main transmission shaft 133 to the planting drive shaft 120.

Further, near the left and right ends of the main transmission shaft 133, the lower ends of the upper and lower transmission shafts 142 (L or R) provided in the left and right upper and lower transmission frames 43 are connected through bevel gears 140 and 141, respectively. are doing. The upper end of the upper and lower transmission shaft 142 is drivingly connected to the seedling removal cam shaft 65 (L or R) via bevel gears 143 and 144. The seedling removal cam 81 is formed integrally with a cylinder 145 that is rotatably fitted to the seedling removal camshaft 65, and the cylindrical body and the seedling removal camshaft 65 are transmitted and received by a fixed position stop clutch 146.
It is connected so that it can be cut. Thereby, the drive of the seedling extracting device 33 can be stopped in units of two lines. In addition, the bevel gear 14
7,148 is transmitted to the seedling hitting camshaft 104. Clutch pin 146a of fixed position stop clutch 146
Is externally operated via a wire 146b.

As shown in FIGS. 18 and 19, the seedling tray collection case 38 has a rectangular parallelepiped shape capable of accommodating a predetermined number of seedling trays T, and has an upper surface and a part of a surface orthogonal to the upper surface. Is a rotatable lid 150. Cutouts 151 and 151 are formed at both left and right ends of the tip of the lid. The lid 150 is interlocked with the handle 152. When the handle 152 is pressed, the lid 150 opens, and when the handle 152 is pulled, the lid 150 closes.

At the time of planting operation, the seedling table support frame 46
The recovery case 38 is placed on the support base 153 fixed to the support 150, and the transport guides 31a, 31a are inserted into the cutouts 151, 151 of the opened lid 150. When the planting section 4 is operated in this state, the seedling tray is moved to the seedling tray transport path 3.
1 and the empty seedling tray from which the seedlings have been taken out at the seedling take-out position P
8 is discharged. When a predetermined number of seedling trays T have been collected in the collection case 38, the handle 152 is pulled up and the collection case 38 is taken out of the support 153. Along with this, the lid 150 is closed.

FIGS. 22 and 23 show different seedling transplanters. The seedling transplanter 1 'includes a seedling tray collection unit 155,
… Are provided at the rear of the traveling vehicle body, and rails 156, 15
6 to be slidable in the left-right direction. For this reason, an empty seedling tray can be collected from the traveling vehicle body, and work efficiency is good.

FIG. 24 is a conceptual view of a washing apparatus for washing a used seedling tray. This cleaning device removes mud attached to the seedling tray by the rotating brushes 162 and 162 while transporting the seedling tray T along a predetermined path 161 by a pair of transport rollers 160 and 160 and further removing the motor. Air is blown into the pot 200 by the turbine 164 driven by 163, and moisture remaining in the pot is discharged to the outside through the cut 201 at the bottom of the pot. As described above, since the use of air can completely remove moisture, the occurrence of inconvenience due to freezing of moisture remaining in the pot in a cold region or the like is prevented.

[0040]

As described above, the seedling transplanter according to the present invention has a simple structure in which a part of a seedling tray is sandwiched between a pair of transport rollers, and the pair of transport rollers are rotated by an electric motor or the like. Therefore, maintenance is easy, the number of parts can be reduced, the weight can be reduced, and the seedling tray can be accurately transported at the time of work by properly controlling the electric motor, etc. Can easily take out the seedling tray from.

In the case where the transport roller is driven by a motor, a detecting means for detecting the operation of the transport apparatus for transporting the seedling tray is provided. If the detecting means does not detect the operation of the transport apparatus for a predetermined time or more, an alarm is issued. Is output or seedling planting is stopped, so that it is possible to prevent occurrence of a lack of stock due to defective seedling tray conveyance due to a motor failure or the like.

[Brief description of the drawings]

FIG. 1 is a side view of a seedling transplanter.

FIG. 2 is a plan view of the seedling transplanter.

FIG. 3 is a side view showing a part of the planting portion.

FIG. 4 is a rear view of the planting section.

FIG. 5 is a rear view of a main part of the planting section.

FIG. 6 is a developed sectional view of the planting section frame.

FIG. 7 is a side view of the seedling tray transport mechanism.

FIG. 8 is a sectional view taken along line S1-S1.

FIG. 9 is a transmission mechanism diagram of the planting section.

FIG. 10 is a rear sectional view of the upper and lower transmission frames and the periphery thereof.

FIG. 11 is a rear sectional view of the seedling removal drive case.

FIG. 12 is a sectional view taken along line S2-S2.

FIG. 13 is a side sectional view of a seedling transport drive case.

FIG. 14 is a side view of the seedling removing device.

FIG. 15 is a rear sectional view of the seedling removing device.

FIG. 16 is a block diagram of a seedling tray transfer control device.

FIG. 17 is a flowchart of seedling tray transfer control.

FIG. 18 is a perspective view of a seedling tray collection case.

FIG. 19 is a side view of a seedling tray collection case attachment portion.

FIG. 20 is a side view of another example of the seedling tray transport detection limit switch.

FIG. 21 is a side view of a sensor for detecting seedling tray conveyance.

FIG. 22 is a side view of a different seedling transplanter.

FIG. 23 is a plan view of the seedling transplanter.

FIG. 24 is a conceptual diagram of a seedling tray cleaning device.

FIG. 25 is a plan view of a seedling tray.

26A and 26B are a side view and a front view of a seedling tray.

[Explanation of symbols]

SW1 Seedling tray transport detection limit switch (detection means) T Seedling tray 1 Seedling transplanter 2 Traveling car body 3 Link device 4 Planting unit 31 Seedling tray transport path 33 Seedling removal device 34 Seedling transport device 35 Seedling removal device 36 Seedling lateral feeding Device 37 Seedling planting device 38 Seedling tray collection case 60 Driving roller (conveying roller) 61 Holding roller (conveying roller) 62 Electric motor

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shizuo Niimi 1-Yakura Hachikura, Tobe-cho, Iyo-gun, Ehime Pref. Iseki Agricultural Machinery Co., Ltd. Technical Department (72) Inventor Yuji Sugawara 1 Yatsukura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. F-term (Reference) 2B064 AA05 AA07 AB07 CA33 DB01 DB03 DB14 DC02 DC04 DC08 EC18

Claims (5)

[Claims] 1. A seedling tray formed by connecting a plurality of pots for accommodating seedlings one by one is intermittently transported in a predetermined direction at a pot pitch along a predetermined seedling tray transport path. In a seedling transplanter that removes seedlings from a seedling tray at a position and transplants the seedlings in a field, a mechanism for transferring the seedling trays along the seedling tray transfer path is arranged in a pair of transferers arranged in a direction intersecting the seedling tray transfer direction. A state in which a part of the seedling tray is sandwiched by rollers, the pair of transport rollers are driven to rotate in a predetermined direction to transport the seedling tray, and a part of the seedling tray is not sandwiched by the pair of transport rollers, and the seedling tray transport path. A seedling transplanter characterized in that it can be switched to a state in which a seedling tray can be removed from the seedling tray. 2. A seedling tray formed by connecting a plurality of pots for accommodating seedlings one by one is intermittently transported in a predetermined direction at a pot pitch along a predetermined seedling tray transport path. In a seedling transplanter that removes seedlings from a seedling tray at a position and transplants the seedlings in a field, a mechanism for transferring the seedling trays along the seedling tray transfer path is arranged in a pair of transferers arranged in a direction intersecting the seedling tray transfer direction. A roller is provided in a state of sandwiching a part of the seedling tray, and the seedling tray is transported in the fixed direction by rotating the pair of transport rollers in one direction, and by rotating the pair of transport rollers in the opposite direction. A seedling transplanter configured to take out a seedling tray from a seedling tray transport path. 3. A seedling tray formed by connecting a plurality of pots for accommodating seedlings one by one is intermittently transported in a predetermined direction at a pot pitch along a predetermined seedling tray transport path. In a seedling transplanter that removes seedlings from a seedling tray at a position and transplants the seedlings to a field, a detecting unit that detects an operation of a transport device that transports the seedling tray is provided. A seedling transplanter characterized by outputting an alarm. 4. A seedling tray formed by connecting a plurality of pots for accommodating seedlings one by one is intermittently conveyed in a predetermined direction at a pot pitch along a predetermined seedling tray conveying path, and is provided in the seedling tray conveying path. In a seedling transplanter that removes seedlings from a seedling tray at a position and transplants the seedlings to a field, a detecting unit that detects an operation of a transport device that transports the seedling tray is provided. A seedling transplanter configured to stop seedling planting. 5. The seedling transplanter according to claim 3, wherein the detection interval of the detection means is changed in accordance with one or both of the distance between the plants and the working speed of the seedlings planted in the field.