JP2009201377A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling transplanter that accurately supplies a proper amount of seedlings (number of seedlings) to a seedling output port and plants seedlings in a proper amount of seedlings on a field regardless of operation conditions etc. <P>SOLUTION: In the seedling transplanter including a seedling receiving frame 81 for receiving the end parts of seedlings, the seedling output port 78 attached to the seedling receiving frame 81, a seedling stand 80 which is horizontally moved along the seedling receiving frame 81 on the upper side of the seedling receiving frame 81 and supplies seedlings to the seedling output port 78, a seedling transport device 79 which transports seedlings on the seedling stand 80 to the seedling receiving frame 81 side at the horizontal transport end of the seedling stand 80, a seedling transport amount change device 135 for changing the transport amount of seedling by the seedling transport device 79 and a seedling planting device for planting seedlings supplied to the seedling output port 78, the seedling transplanter is equipped with a seedling amount sensor 140 for determining the amount of seedlings on the seedling stand 80 and a seedling transport amount controller for controlling the seedling transport amount change device 135 so as to lessen the seedling transport amount of the seedling transport device 79 when the amount of seedlings on the seedling stand 80 is large based on the detection of the seedling amount sensor 140. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seedling transplanter.

In a riding type rice transplanter that is an example of a seedling transplanter, a seedling receiving frame that receives an end of the seedling, a seedling outlet provided in the seedling receiving frame, and a right and left moving along the seedling receiving frame above the seedling receiving frame A seedling mount that is supplied to the seedling outlet, a seedling transfer device that includes an actuator that transfers the seedling on the seedling base to the seedling receiving frame side at the left and right moving ends of the seedling counter, and is supplied to the seedling outlet Provided with a seedling planting device for planting the seedlings, and a seedling movement amount sensor for detecting the amount of movement of the seedlings on the seedling mounting table in the transfer direction of the seedling transfer device, and based on the detection of the seedling movement amount sensor Is provided with a control device for controlling the seedling transfer amount of the seedling transfer device so that the seedlings are transferred at a predetermined transfer amount (see Patent Document 1).
JP 2006-197849 A

  According to the above background art, when a seedling with a soft floor is transferred or when the weight of the seedling on the seedling stage is large, the seedling is compressed on the seedling stage and supplied to the seedling outlet. The amount of seedlings per plant (number of seedlings) may increase. In addition, when the operation speed of the seedling transfer device is high, slippage occurs in the transfer of the seedling of the seedling transfer device and the actual amount of seedling transfer tends to be small.

  Therefore, the present invention has an object to accurately supply an appropriate amount of seedlings (number of seedlings) to a seedling outlet regardless of work conditions and the like, so that seedlings can be planted in a field with an appropriate amount of seedlings. And

In order to solve the above problems, the present invention has taken the following technical means.
That is, the invention according to claim 1 includes a seedling receiving frame (81) for receiving an end of the seedling, a seedling outlet (78) provided in the seedling receiving frame (81), and the seedling receiving frame above the seedling receiving frame (81). (81) and a seedling stage (80) that moves left and right along the seedling outlet (78) by moving left and right along the seedling stage (80). A seedling transfer device (79) for transferring seedlings to the seedling receiving frame (81) side, a seedling transfer amount changing device (135) for changing the transfer amount of seedlings by the seedling transfer device (79), and a seedling outlet (78) In a seedling transplanter provided with a seedling planting device (37) for planting seedlings supplied to the plant, a seedling amount sensor (140) for discriminating the amount of seedlings on the seedling mount (80) is provided, and the seedling amount Based on the detection of the sensor (140), when the amount of seedlings on the seedling mount (80) is large, the seedling transfer amount of the seedling transfer device (79) is reduced. Was seedling transfer rate controller (138) is provided with seedling transplanter for controlling Okuryou change device (135).

  Therefore, the seedling transplanting machine according to claim 1 moves the seedling mounting base (80) along the seedling receiving frame in a state where the seedling is mounted on the seedling mounting base (80), and the seedling is transferred to a predetermined seedling. One stock is supplied to the outlet (78) one by one, and the seedling planting device (37) takes out the one seedling supplied to the seedling outlet (78) and transplants it to the field. The seedling transfer device (79) transfers the seedling on the seedling mounting base (80) to the seedling receiving frame (81) side at the left and right moving ends of the seedling mounting base (80). At this time, if the amount of seedlings on the seedling mount (80) is large based on the detection of the seedling amount sensor (140) by the seedling transfer amount control device (138), the amount of seedlings transferred by the seedling transfer device (79) The seedling transfer amount changing device (135) is controlled so as to be small.

  Further, the invention according to claim 2 is provided with a seedling movement amount sensor (137) for detecting the amount of movement of the seedling on the seedling placing stand (80) in the transfer direction of the seedling transfer device (79), and controls the seedling transfer amount. The device (138) is configured to control the seedling transfer amount changing device (135) so that the seedling transfer device (79) transfers the seedling by a predetermined transfer amount based on the detection of the seedling movement amount sensor (137). The seedling transplanter according to Item 1 was used.

  Therefore, in the seedling transplanting machine according to claim 2, in addition to the operation of the seedling transplanting machine according to claim 1, the seedling transfer device (79) determines the seedling based on the detection of the seedling movement amount sensor (137). Transfer with the transfer amount.

  Moreover, the invention which concerns on Claim 3 provides the planting speed sensor (24a) which judges the operating speed of a seedling planting apparatus (37), and a seedling transfer amount control apparatus (138) is a planting speed sensor (24a). When the operation speed of the seedling planting device (37) is high, the seedling transfer amount changing device (135) is controlled to increase the seedling transfer amount of the seedling transfer device (79) based on the detection of The seedling transplanter according to Item 1 or 2 was used.

  Therefore, the seedling transplanter according to claim 3 has a seedling transfer device (79) when the operation speed of the seedling transplanting device (37) is high in addition to the operation of the seedling transplanter according to claim 1 or 2. The amount of seedlings transferred becomes large.

  The invention according to claim 4 is characterized in that the seedling reduction sensor (136) for detecting that the seedling has decreased at an appropriate position on the seedling mount (80) is transferred from the seedling movement amount sensor (137) to the seedling transfer device (79). ) On the upper side in the transfer direction, the seedling transfer amount control device (138) detects the amount of seedlings decreased by the seedling reduction sensor (136), based on the detection of the seedling movement amount sensor (137). The seedling transplanter according to claim 2, wherein the changing device (135) is not controlled.

  Therefore, in the seedling transplanting machine according to claim 4, in addition to the operation of the seedling transplanting machine according to claim 2, the seedling decreases from the position of the seedling movement amount sensor (137) to the lower side in the transfer direction, and the seedling When the movement amount sensor (137) cannot detect the transfer amount of the seedling, the transfer amount of the seedling is prevented from being controlled based on the seedling movement amount sensor (137).

  In the invention according to claim 5, the seedling movement amount sensor (137) comprises a rotation angle detection type sensor that rotates when the outer peripheral surface contacts the seedling, and the maximum seedling transfer of the seedling transfer device (79) is achieved. The seedling transplanter according to claim 2 or 4, wherein the seedling movement amount sensor (137) has an outer peripheral length larger than the amount.

  Therefore, the seedling transplanting machine according to claim 5 has a seedling movement amount sensor (137) in addition to the operation of the seedling transplanting machine according to claim 2 or 4, in addition to the seedling transfer device (79). ) Does not rotate more than once, and it is possible to prevent erroneous detection of the amount of seedling transferred.

The invention according to claim 6 is configured to count the number of seedlings replenished to the seedling mount (80) by the seedling amount sensor (140). It was.
Therefore, the seedling transplanter according to claim 6 can count the number of seedlings to be used by the seedling amount sensor (140) in addition to the operation of the seedling transplanter according to any one of claims 1 to 5.

  According to the invention according to claim 1, when the amount of seedlings on the seedling stage (80) is large, the seedlings are compressed by their own weight and the density of the seedlings is increased. Since the amount of seedlings is controlled to be small, the amount of seedlings per planting (number of seedlings) supplied to the seedling outlet (78) can be made appropriate, and the number of seedlings per strain can be reduced. You can plant seedlings properly.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the seedling transfer of the seedling transfer device (79) based on the transfer amount of the seedling actually transferred by the seedling movement amount sensor (137) Since the amount is controlled, the amount of seedling transferred can be optimized.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, when the operation speed of the seedling planting device (37) is high, the operation of the seedling transfer device (79) is accordingly high speed. Thus, slippage occurs in the transfer of the seedling of the seedling transfer device (79), and the actual transfer amount of the seedling is prevented from being reduced, so that the transfer amount of the seedling can be optimized.

  According to the invention of claim 4, in addition to the effect of the invention of claim 2, the number of seedlings decreases from the position of the seedling movement amount sensor (137) to the lower side in the transfer direction, and the seedling movement amount sensor (137) becomes the seedling. When the transfer amount of the seedling cannot be detected, it is possible to prevent the transfer amount of the seedling from being controlled based on the seedling movement amount sensor (137) and to appropriately control the transfer amount of the seedling.

  According to the invention of claim 5, in addition to the effect of the invention of claim 2 or 4, the seedling movement amount sensor (137) makes one rotation or more by one transfer of the seedling of the seedling transfer device (79). Therefore, the amount of seedling transferred can be detected accurately without erroneous detection.

  According to the invention which concerns on Claim 6, counting of the number of the seedlings to be used can be performed with the seedling quantity sensor (140). Therefore, the number of seedlings used can be detected with a simple configuration using the seedling amount sensor (140).

One embodiment of the present invention will be described below.
1 and 2 show a riding type rice transplanter (1) with a six-row planting fertilizer, and this riding type rice transplanter (1) is raised and lowered to the rear side of the traveling vehicle body (2). A seedling planting part (4) is mounted so as to be movable up and down via a link device (3), and a main body portion of a fertilizer application device (5) is provided on the rear upper side of the traveling vehicle body (2).

  The traveling vehicle body (2) is a four-wheel drive vehicle provided with a pair of left and right front wheels (6) and rear wheels (7) as drive wheels, and a transmission case (8) is disposed at the front of the fuselage, A pair of left and right front wheel final cases (9) are provided on the left and right sides of the mission case (8), and the front wheel axles project outward from the pair of left and right front wheel support portions that can be turned in the front wheel final case (9). The front wheel (6) is attached to. Further, a front end portion of the main frame (10) is fixed to the rear portion of the transmission case (8), and a pair of left and right rear wheel rolling shafts provided horizontally at the front and rear of the main frame (10). A pair of left and right rear wheel gear cases (12) is supported so as to be able to roll with the fulcrum as a fulcrum, and a rear wheel (7) is attached to a rear wheel axle projecting outward from the rear wheel gear case (12).

  The engine (13) serving as the prime mover is mounted on the main frame (10), and the hydraulic power serving as the transmission device in which the rotational power of the engine (13) can be switched between forward and reverse rotation via the belt transmission device (14). Is input to the forward / reverse continuously variable transmission (15). The output from the forward / reverse continuously variable transmission (15) is transmitted to the mission case (8). The rotational power transmitted to the transmission case (8) is branched and transmitted to the traveling transmission path and the planting transmission path at the transmission branching portion in the transmission case (8), and is converted into the traveling power and the external extraction power. Separated and taken out. A part of the traveling power is transmitted to the front wheel final case (9) to drive the front wheel (6), and the rest is transmitted to the rear wheel gear case (12) to drive the rear wheel (7). Further, the external take-out power is transmitted to the planting clutch case (18) provided at the rear part of the traveling vehicle body (2) via the take-out transmission shaft (17), and then the seedling planting part is provided by the planting transmission shaft (19). While being transmitted to (4), it is transmitted to the fertilizer application device (5) by the fertilizer transmission mechanism.

  The upper part of the engine (13) is covered with an engine cover (20), and a seat (21) is installed thereon. A front cover (22) incorporating various operation mechanisms is provided in front of the seat (21), and a handle (23) for steering the front wheel (6) is provided above the front cover (22). A forward / reverse transmission lever (24) for operating the forward / reverse continuously variable transmission (15) is provided on the right side of the handle (23). A forward / reverse shift lever sensor (24a) for detecting the operation position of the forward / reverse shift lever (24) is provided, and this forward / reverse shift lever sensor (24a) determines the operating speed of a seedling planting device (37) described later. It becomes a planting speed sensor. The grip portion of the forward / reverse speed change lever (24) is provided with a planting raising / lowering operation switch for performing raising / lowering operation and turning on / off of the seedling planting portion (4). The left and right sides of the lower end of the engine cover (20) and the front cover (22) are horizontal floor steps (26). In addition, on the left and right sides of the front part of the traveling vehicle body (2), there are provided spare seedling platforms (27) on which supplementary seedlings are placed.

  The lift link device (3) includes one upper link (70) and a pair of left and right lower links (71). The upper link (70) and the lower link (71) are rotatably attached to a link base frame (72) having a rear-view portal shape whose base side is erected at the rear end of the main frame (10). A vertical link (73) is connected to the tip side. And the connection shaft (74) rotatably supported by the seedling planting part (4) is inserted and connected to the lower end part of the vertical link (73), and the seedling planting part (4) is centered on the connection shaft (74). Are connected in a rolling manner. A lifting hydraulic cylinder (76) is provided between the support member fixed to the main frame (10) and the tip of the swing arm integrally formed with the upper link (70), and the lifting hydraulic cylinder (76) is hydraulically operated. By extending and contracting, the upper link (70) rotates up and down, and the seedling planting part (4) moves up and down while maintaining a substantially constant posture.

  The seedling planting part (4) has an eight-row planting structure, a transmission case (77) that also serves as a frame, and a mat seedling is placed to reciprocate left and right to feed the seedlings to the seedling outlet (78) for each line. When all the seedlings for one horizontal row are supplied to the seedling outlet (78), the seedling stage (80) for transferring the seedlings downward by the seedling feeding belt (79), and the seedling supplied to the seedling outlet (78) A seedling planting device (37) and the like for planting in a field with a seedling planting tool (37a) are provided.

  The seedling mounting table (80) is supported on the back side of the seedling mounting surface so as to be movable in the left-right direction along a horizontal frame (81) serving as a seedling receiving frame provided in a left-right direction at a lower portion on the back side. The seedling stage (80) includes a plurality of partition wall portions (80a) extending vertically, and is divided by the partition wall portion (80a) to form a seedling placement portion (80b) for each strip. , 8 seedlings can be mounted. The horizontal frame (81) is provided with eight seedling outlets (78). A lead cam shaft (82) that protrudes from the left and right sides of the transmission case (77) and moves the lead cam (82a) back and forth in the horizontal direction by the power in the transmission case (77) is provided. (80) is connected, and the lead cam shaft (82) is driven to rotate so that the seedling stage (80) reciprocates left and right. One end (left end) of the lead cam shaft (82) is supported by the transmission case (77).

  An upper left / right moving guide member (120) and a lower left / right moving guide member (121), which are long in the left-right direction, are respectively fixedly provided on the upper and lower sides of the rear surface side of the seedling mount (80). The upper left / right moving guide member (120) is formed in a cross-sectional shape with the lower side cut out in a side view, and is engaged with a rotatable support roller (122) supported from the lower side. A plurality of (four) support rollers (122) are provided at appropriate positions (four locations) along the upper left / right moving guide member (120), and are secured to the upper side of the transmission case (77). It is attached to the upper part of the support frame (123). The lower left / right moving guide member (121) is placed on the horizontal frame (81) from above. Therefore, the seedling stage (80) is supported by the support roller (122) and the horizontal frame (81) so as to be movable in the left-right direction.

  The seedling stage support frame (123) is provided with left and right moving end sensors (131) for detecting that the seedling stage (80) has reached the left and right moving ends, and the moving end sensor (131) is a seedling stage. (80) The partition wall part (80a) which protrudes in the back surface side of the left-right direction edge part contacts, and becomes a structure detected.

  The seedling feeding belt (79) is wound around the driving roller (84) and the driven roller (85). The drive roller (84) is provided so as to rotate integrally with the seedling feed drive shaft (86) in the left-right direction. The seedling feed drive shaft (86) is provided for every two strips, and the ratchet mechanism (87) transmits rotation only in the direction in which the seedling feed belt (79) feeds the seedling. Accordingly, the seedling feeding belt (79) serves as a seedling transfer device for transferring the seedling on the seedling mounting base (80) to the seedling receiving frame (81) side at the left and right moving ends of the seedling mounting base (80).

  The drive mechanism of the seedling feeding belt (79) has the following configuration. That is, the drive side arm (88) which protrudes from both right and left sides of the transmission case (77) and is driven to rotate is provided. The drive arm (88) on the right side of the transmission case (77) is rotationally driven via the lead cam shaft (82). Moreover, the relay shaft (89) of the left-right direction is provided for every 2 articles | strands above the seedling feed drive shaft (86), and the driven arm (90) is attached to it. The relay shaft (89) and the seedling feed drive shaft (86) are connected in transmission by a link mechanism (94) including a first arm (91), a second arm (92), and a link (93).

  When the seedling stage (80) reaches the end of the left-right movement stroke, the driving side arm (88) hits the driven side arm (90) from the lower side, and rotates the relay shaft (89) by a predetermined angle. The rotation is transmitted to the seedling feed drive shaft (86) via the link mechanism (94) and the ratchet mechanism (87). Thereby, the seedling feeding belt (79) is operated by a predetermined amount. Note that the two driven arms (90) on the left and right sides are the same as the single driving arm (88) so that the seedling mount (80) can transmit the seedling feeding power at the left and right moving ends. It is provided on the relay shaft (89). When the driving side arm (88) is separated from the driven side arm (90), the relay shaft (89) and the driven side arm (90) are returned to the positions before driving by the tension of the spring locked to the relay shaft (89).

  As for the link mechanism (94) and the ratchet mechanism (87), the right end portion of the seedling mounting stand (80) is for the right two pieces, and the third seedling mounting portion (80b) from the right is for the central two portions. The right end portion and the left two portions are arranged at the right end portion of the seedling mount (80). The link mechanism (94) and the ratchet mechanism (87) for the two central strips are on the left and right side (right side) with respect to the seedling feed transmission part (77a) of the transmission case (77) that is displaced to the left and right side (left side). Therefore, the seedling stage (80) and the transmission case (77) can be moved close to each other while not interfering with the transmission case (77). The ratchet mechanism (87) is provided with seedling feeding clutches for turning on and off the driving of the seedling feeding belts (79) for two strips. Accordingly, a seedling feeding clutch wire (132) for operating the seedling feeding clutch is provided along the seedling mounting base (80) on the back side of the seedling mounting base (80) from the ratchet mechanism (87). In addition, the other end of the seedling feeding clutch wire (132) is connected to a hook clutch lever (133) for turning on and off the planting for every two strips. A total of three hook clutch levers (133) are provided at the rear part of the traveling vehicle body (2), and the operation position can be detected by each hook clutch lever sensor (133a).

  Further, on the front side of the seedling mount (80) of the seedling planting section (4), per strain that the horizontal frame (81) is moved up and down and the seedling planting device (37) takes out at the seedling outlet (78). A seedling removal amount changing lever (134) for changing the amount of seedlings is provided. The seedling removal amount changing lever sensor (134a) detects the operation position of the seedling removal amount changing lever (134).

  Two drive-side arms (88) are provided on each of the right and left sides of the seedling feed transmission portion (77a) of the transmission case (77). The right outer drive side arm (88) hits the right driven arm (90) of the right relay shaft (89) when the seedling stage (80) moves to the right end of the right and left movement. The right inner drive side arm (88) hits the right side driven arm (90) of the center relay shaft (89) when the seedling stage (80) moves to the right end of the left and right movement, and the seedling stage (80). ) Hits the driven arm (90) on the left side of the right relay shaft (89). The left inner drive side arm (88) hits the driven arm (90) on the left side of the center relay shaft (89) when the seedling stage (80) moves to the left end of the left and right movement, and the seedling stage (80 ) Hits the right-hand driven arm (90) of the left relay shaft (89). The left outer drive side arm (88) hits the driven arm (90) on the left side of the left relay shaft (89) when the seedling stage (80) moves to the left end of the left and right movement. Therefore, the number of driving side arms (88) is reduced to four with respect to the total of six driven side arms (90).

  The left and right driven arms (90) of the left and right relay shafts (89) are arranged at the left and right central portions of the relay shaft (89). The driven arm (90) is disposed at both left and right ends of the relay shaft (89). As a result, power can be transmitted from the drive side arms (88) on both the left and right sides (inside) of the transmission case (77) to the relay shaft (89) at the center on the left and right sides, and the drive side on the left and right sides can be distributed by moving left and right. The arm (88) can also be used as an arm for transmitting power to the left and right relay shafts (89). In addition, the left and right driven arms (90) of each relay shaft (89) can be arranged in a substantially bilaterally symmetric position in each relay shaft (89), and seedlings to be described later are arranged substantially at the center in the left and right every two lines. The change setting of the seedling feed amount by the movement amount changing motor (135) can be performed with high accuracy.

  A seedling reduction sensor (136) is provided at an appropriate position near the seedling feeding belt (79) of the seedling mounting portion (80b) of each strip of the seedling mounting base (80). The seedling reduction sensor (136) detects the presence or absence of seedlings to detect that seedlings have been reduced at an appropriate position on the seedling mount (80). A seedling movement amount sensor (137) is provided at an appropriate position near the seedling feeding belt (79) of the seedling placement part (80b) of the first, fourth and sixth articles from the right. This seedling movement amount sensor (137) is provided at the tip of the sensor mounting arm (139) urged by the spring (138) to turn to the seedling side (upper side), and the outer peripheral surface contacts the bottom surface of the seedling. A rotation angle detection type sensor (potentiometer) for detecting the rotation angle of the seedling feed belt (79) in the direction of seedling transfer of the seedlings on the seedling mount (80). The amount of movement is detected. The seedling movement amount sensor (137) is configured so that the outer peripheral length of the seedling movement amount sensor (137) is larger than the maximum amount of seedlings transferred by the seedling feeding belt (79) by a seedling movement amount changing motor (135) described later.

  The seedling movement amount sensor (137) is a sensor that detects a rotation angle as an angle value of 0 degree or more and less than 360 degrees, and detects a movement amount of the seedling from angle values before and after the seedling feeding operation. The control unit (138) makes the difference between 360 degrees and the angle value before the seedling feeding operation, and the angle value after the seedling feeding operation and 0 degree so that it can be detected even when the angle value is detected across the angle value of 0 degree. (Calculation formula: (Moving amount of seedling) = {360 degrees-(angle value before seedling feeding operation)} + {(angle after seedling feeding operation) Value)-0 degrees}). Accordingly, the amount of movement of the seedling can be detected with a simple sensor (potentiometer) that only detects the angle value.

  In addition, a seedling movement amount sensor (137) is provided on a strip close to the seedling feeding clutch, and a motor support frame (139) of a seedling transfer amount changing motor (135), which will be described later, also serves as a protective frame for the seedling movement amount sensor (137). Is provided only on the back surface side of the first, fourth and sixth seedling placement parts (80b) from the right, and the seedling feed clutch wire (132) is passed inside the motor support frame (139) to provide the motor support frame (139). ) Also serves as a protective frame for the seedling feeding clutch wire (132).

  The seedling movement amount sensor (137) is located at the left and right center of the seedling placement part (80b). The seedling reduction sensor (136) is positioned at the center of the seedling placement part (80b) in the seedling placement part (80b) not provided with the seedling movement amount sensor (137), but the seedling movement amount sensor (137). ) Is provided at one end in the left-right direction of the seedling mounting portion (80b). Thus, the seedling movement amount sensor (137) is positioned in the center of the right and left of the seedling placement portion (80b) in preference to the seedling reduction sensor (136) so that the amount of seedling movement can be detected with high accuracy. The seedling reduction sensor (136) of each line is arranged at an upper position slightly along the seedling mount (80) from the seedling movement amount sensor (137).

  Each seedling amount sensor for determining the amount of seedlings on the seedling placement portion (80b) is located above the seedling feeding belt (79) of the seedling placement portion (80b) provided with the seedling movement amount sensor (137). (140) is provided. This seedling amount sensor (140) is provided at a position (position 58 cm from the horizontal frame (81)) above the horizontal frame (81) along the seedling mount (80) by one seedling. By detecting the presence or absence of seedlings, the amount of seedlings on the seedling mount (80) is determined. The seedling amount sensor (140) is located at the center of the seedling placement part (80b).

  On the back side of the partition wall portion (80a) at the center of the left and right in the seedling placement portion (80b) for every two strips, the seedling transfer amount change for changing the seedling transfer amount by the seedling feeding belt (79) every two strips A motor (135) is provided. This seedling transfer amount changing motor (135) serves as a seedling transfer amount changing device for changing the amount of seedling transferred by the seedling transfer device. Since the seedling transfer amount changing motor (135) is disposed at the center of the left and right of every two strips, the seedling feed amount can be changed appropriately and accurately every two strips. A fan-shaped gear (141) that meshes with and rotates with the pinion (135a) of the seedling transfer amount changing motor (135) is provided, and rotates integrally with the relay shaft (89) from the fan-shaped gear (141) through the connecting rod (142). It is connected to the seedling feed regulating arm. The connecting rod (142) is connected to a long hole (143) provided in the seedling feed restricting arm. Accordingly, when the seedling transfer amount changing motor (135) is driven to rotate the fan-shaped gear (141) and the seedling feeding restricting arm is forcibly turned upward through the long hole (143), the seedling feeding operation is performed. The relay shaft (89) can be rotated by the long hole (143). When the driving side arm (88) is separated from the driven side arm (90), the relay shaft (89) and the driven side arm (90) are end portions of the long hole (143) serving as a regulating member by the tension of the spring. It is the structure which returns to the position where the edge part of a connection rod (142) contacts. The seedling feed restriction arm is also used as the right driven arm (90) for the right two pieces, and the left driven arm (90) for the left two pieces, while the central two pieces are dedicated central seedling feed restriction arms. (144). Accordingly, since the left and right seedling feed restriction arms are the outer driven arms (90), maintenance such as attachment / detachment of the connecting rod (142) is easy.

  On the upper side of the seedling mounting surface (80c) of the seedling mounting base (80), there is provided a seedling presser (130) that hits the upper surface of the mat seedling floor and presses the mat seedling to the seedling mounting surface (80c) side. Yes. The seedling presser (130) presses the mat seedling appropriately to the seedling feeding belt (79) side so that the mat seedling can be reliably and accurately transferred by the seedling feeding belt (79).

  In the lower part of the seedling planting part (4), there are a center float (100) for leveling the seedling planting position for the central two strips, and a side float (101) for leveling the seedling planting positions for the left and right outer strips. Is provided. When the aircraft is advanced with these floats, center float (100) and side float (101) in contact with the mud surface of the field, the center float (100) and side float (101) level the mud surface. The seedling is planted by the seedling planting device (37). Each float is pivotably attached so that the front end side moves up and down according to the unevenness of the field topsoil surface, and the vertical movement of the front part of the center float (100) is detected by the vertical movement detection mechanism during planting work. The seedling planting depth is always kept constant by switching the hydraulic valve that controls the lifting hydraulic cylinder (76) according to the detection result to raise and lower the seedling planting part (4).

  The fertilizer application device (5) uses the fertilizer (powder granule) stored in the fertilizer storage tank (powder storage tank) (110) to be constant by the fertilizer feed part (powder feed part) (63) of each strip. The fertilizer is fed out to the fertilizer transfer hose (powder transfer hose) (111) to the fertilizer guide (112) attached to the center float (100) and the side float (101), and the front side of the fertilizer guide (112) It is made to discharge in the fertilization groove formed in the side part vicinity of a seedling planting strip by the groove body (113) provided in. The pressure air generated by the blower (115) driven by the motor (114) is blown into the fertilizer transfer hose (111) through the air chamber (116) which is long in the left-right direction, and the fertilizer in the fertilizer transfer hose (111) Is forcibly transferred to a fertilizer discharge port (fertilization guide (112)) on the seedling planting part (4) side. The fertilizer supplied into the fertilizer groove is covered with a cover plate (117) attached to the center float (100) and the side float (101) behind the fertilizer guide (112) and the groove body (113).

  Since it is desirable that the fertilizer application guide (112) and the grooved body (113) of each strip are made uniform in the positional relationship (distance) with the corresponding seedling planting device (37) and the fertilization effect of each strip is made uniform. These are arranged at the same position in the front-rear direction (the same position in a side view of the body). Similarly, it is desirable that the distances between the covering plates (117) of the respective strips are made uniform with respect to the corresponding fertilization guide (112), the groove body (113), and the seedling planting device (37). This is because if the cover plate is positioned too close to the fertilizer guide, the mud pushed by the cover plate may be supplied into the fertilizer guide and the fertilizer guide may be clogged. If it is positioned too far from the fertilizer application guide, the fertilizer will rise slightly from the bottom of the fertilizer ditch due to water in the field before covering with the cover plate, resulting in less soil cover and appropriate fertilization effect. It is because there is a risk of disappearing.

  In this riding type rice transplanter (1), the seedling movement amount sensor (137) is detected from the timing when the seedling feeding belt (79) completes the previous seedling feeding operation based on the detection of the moving end sensor (131). Until the seedling feeding operation is completed, the movement amount of the seedling is detected, and the detected movement amount is input to the control unit (138). The control unit (138) compares the input actual moving amount with the set moving amount calculated from the seedling removal amount changing lever sensor (134a). When the actual moving amount is larger than the set moving amount, the next seedling feeding amount is small. On the contrary, when the actual movement amount is smaller than the set movement amount, the seedling transfer amount changing motor (135) is output to operate the seedling transfer amount changing motor (135) so that the next seedling feeding amount is increased. . A signal from the seedling feed amount adjustment dial (145) is input to the control unit (138) by the seedling feed amount adjustment dial (145) provided on the front cover (22), and the set movement amount is corrected. It can be changed.苗 When the signals from the clutch lever sensor (133a) and the seedling reduction sensor (136) are input to the control unit (138) and the seedling feeding clutch is disengaged, or one of the two seedlings is reduced When the sensor (136) detects that the number of seedlings has decreased, the control unit (138) outputs to the seedling transfer amount changing motor (135) to the reference position based on the detection of the seedling removal amount changing lever sensor (134a). Return the seedling transfer amount changing motor (135).

  Then, a signal from the seedling amount sensor (140) is input to the control unit (138), and the control unit (138), when the amount of seedlings is large (when there is a seedling at the position of the seedling amount sensor (140)). Correct the setting movement amount to a smaller value. Further, a signal from the forward / reverse shift lever sensor (24a) is input to the control unit (138), and the control unit (138) greatly corrects the set movement amount when the work speed is high.

  When the seedling reduction sensor (136) of the corresponding two seedling reduction sensors (136) inputs that the seedling has been reduced, the control unit (138) issues a seedling reduction warning, Regardless of the detection of the seedling movement amount sensor (137), the seedling transfer amount change motor (135) is output to the seedling transfer amount change motor (135) to the reference position based on the detection of the seedling removal amount change lever sensor (134a). return.

  The control unit (138) counts the total number of times that all the seedling amount sensors (140) are turned from OFF to ON, and doubles the counted value to replenish the seedling mounting table (80). The number of seedlings may be counted. As a result, the operator can grasp the number of seedlings used, or change the seedling feeding amount by correcting the set moving amount so that the planting work can be performed with an appropriate number of seedlings according to the number of used seedlings. Can do.

Further, since the amount of movement of the seedling is detected by the seedling movement amount sensor (137) even during the turning of the body based on the operation of the handle (23) or the like, it is possible to further optimize the seedling feeding amount.
In addition, when the amount of seedlings is large as detected by the seedling amount sensor (140), the control sensitivity of the raising / lowering control of the seedling planting part (4) is corrected by correcting the angle of attack of the center float (100) to the front lower side. May be corrected to the sensitive side. Further, when the amount of seedlings is large as detected by the seedling amount sensor (140), the seedling removal amount changing lever (134) may be automatically operated to correct the amount of seedlings to be increased.

  Further, when the seedling planting part (4) is deactivated by the planting up / down operation switch, the forward / reverse shift lever sensor (24a) operates the forward / reverse shift lever (24) to the neutral position to stop traveling. If the movement amount of the seedling detected by the seedling movement amount sensor (137) is extremely large, the movement amount of the seedling may not be detected by the seedling movement amount sensor (137). . Thereby, it is possible to prevent erroneous detection at the time of seedling replenishment to the seedling mount (80).

  Note that if the rotation angle of the sensor mounting arm (139) of the seedling movement amount sensor (137) is detected and the set movement amount is corrected by this rotation angle, it depends on the weight of the seedling and the water condition of the seedling. Thus, the actual amount of seedling movement can be controlled to be appropriate.

In addition, a seedling movement amount sensor (137), a seedling amount sensor (140), a seedling transfer amount change motor (135), and the like may be provided for each line, and the amount of seedling movement may be controlled for each line.
In addition, although embodiment of this invention described the riding type rice transplanter (1), this invention is not limited to a riding type rice transplanter.

Side view of rice transplanter Top view of rice transplanter Front view showing the seedling feed transmission configuration of the seedling stand in an easy-to-understand manner Cross-sectional side view showing the device for changing the seedling transfer amount on the seedling stand Cross-sectional side view showing the seedling movement sensor on the seedling stand in an easy-to-understand manner Block Diagram

Explanation of symbols

  1: Rice transplanter, 24a: Forward / reverse speed shift lever sensor, 37: Seedling planting device, 78: Seedling outlet, 79: Seedling feeding belt, 80: Seedling mount, 81: Horizontal frame, 135: Seedling transfer amount changing motor 136: Seedling reduction sensor, 137: Seedling movement amount sensor, 138: Control unit, 140: Seedling amount sensor

Claims (6)

A seedling receiving frame (81) for receiving an end of the seedling, a seedling outlet (78) provided in the seedling receiving frame (81), and a right and left movement along the seedling receiving frame (81) above the seedling receiving frame (81) A seedling stage (80) for supplying seedlings to the seedling outlet (78), and the seedlings on the seedling stage (80) at the left and right moving ends of the seedling stage (80) are transferred to the seedling receiving frame (81) side. Seedling transfer device (79), seedling transfer amount changing device (135) for changing the amount of seedling transferred by the seedling transfer device (79), and seedling planting for seedling supplied to the seedling outlet (78) In the seedling transplanter provided with the attaching device (37), a seedling amount sensor (140) for discriminating the amount of seedlings on the seedling placing stand (80) is provided, and the seedling is determined based on the detection of the seedling amount sensor (140). The seedling transfer amount changing device (135) is controlled so that the seedling transfer amount of the seedling transfer device (79) becomes small when the amount of seedlings on the mounting table (80) is large. Seedlings transfer amount controller seedling transplanter having a (138). A seedling movement amount sensor (137) for detecting a movement amount of the seedling on the seedling mount (80) in the transfer direction of the seedling transfer device (79) is provided, and the seedling transfer amount control device (138) is a seedling movement amount sensor. The seedling transplanter according to claim 1, wherein the seedling transfer device (79) controls the seedling transfer amount changing device (135) so that the seedling transfer device (79) transfers the seedling by a predetermined transfer amount based on the detection of (137). A planting speed sensor (24a) for determining the operating speed of the seedling planting device (37) is provided, and the seedling transfer amount control device (138) is based on the detection of the planting speed sensor (24a). The seedling transplanter according to claim 1 or 2, wherein the seedling transfer amount changing device (135) is controlled so that the seedling transfer amount of the seedling transfer device (79) is increased when the operation speed of 37) is high. . A seedling reduction sensor (136) for detecting that the seedling has been reduced at an appropriate position on the seedling mount (80) is provided on the upper side in the transfer direction of the seedling transfer device (79) from the seedling movement amount sensor (137). The transfer amount control device (138) does not control the seedling transfer amount changing device (135) based on the detection of the seedling movement amount sensor (137) when it is detected by the seedling reduction sensor (136) that the seedling has decreased. The seedling transplanter according to claim 2. The seedling movement amount sensor (137) is composed of a rotation angle detection type sensor that rotates when the outer peripheral surface contacts the seedling, and the seedling movement amount sensor (137) is larger than the maximum amount of seedlings transferred by the seedling transfer device (79). The seedling transplanting machine according to claim 2 or 4 constituted so that perimeter length of may become large. The seedling transplanter according to any one of claims 1 to 5, wherein the seedling amount sensor (140) counts the number of seedlings replenished to the seedling mount (80).

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