JP2011072232A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling transplanter in which mud is hardly attached between a seedling receiving frame and a lower end part of a seedling loading stand. <P>SOLUTION: The seedling transplanter is equipped with the seedling loading stand 80 that is moved right and left above the seedling receiving frame 81 for receiving end parts of seedlings and along the seedling receiving frame 81 and supplies the seedlings to a seedling outlet 78, a scraper 29 attached below the seedling loading stand 80, and one or more grooves 29a at the side of the scraper 29 in contact with the seedling receiving frame 81 in the thickness direction of the seedling loading stand 80 from a seedling loading surface side toward a seedling surface side. The scraper 29 easily removes mud attached to the seedling receiving frame 81 when the seedling loading stand 80 of the scraper 29 is slid right and left. When a plurality of the grooves 29a are arranged at the lower side of the scraper 29, each time the seedling loading stand 80 is moved right and left even if mud is deposited on the seedling receiving frame 81, the lower end part of the scraper 29 is easily deformed to remove the mud on the seedling receiving frame 81. There is no possibility of damaging the seedling loading stand 80 due to forced slide of the seedling loading stand 80. <P>COPYRIGHT: (C)2011,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 portion of a seedling, a seedling outlet provided in the seedling receiving frame, and a right and left reciprocating motion along the seedling receiving frame above the seedling receiving frame Is provided with a seedling mounting base for supplying the seedling to the seedling outlet (see Patent Document 1).

JP 2008-154535 A

  According to the invention described in Patent Document 1, mud adheres between the seedling receiving frame and the lower end portion of the seedling stage that reciprocates left and right when the seedling transplanting operation is advanced by the seedling transplanting machine, and the seedling stage is moved. Since it could not be performed smoothly, it was necessary to interrupt the seedling planting work and frequently perform mudguarding work.

  Then, the subject of this invention is providing the seedling transplanting machine which made it difficult for mud to adhere between a seedling receiving frame and the lower end part of a seedling mounting stand.

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). A seedling mounting stand (80) that moves left and right along (81) to supply seedlings to the seedling outlet (78), and a seedling planting device (37) for planting seedlings supplied to the seedling outlet (78) ) And a scraper (29) for scraping off the soil on the seedling receiving frame (81) is attached to the lower end portion of the seedling mounting base (80).

  The invention according to claim 2 is characterized in that one or more grooves (29a) facing the seedling receiving frame (81) are formed on the side surfaces of the scraper (29) in contact with the seedling receiving frame (81) in a direction away from the thickness direction of the seedling mounting base (80). The seedling transplanter according to claim 1, wherein the seedling transplanter is provided.

  The invention according to claim 3 is characterized in that the cross-sectional shape of the scraper (29) is made narrower as the position is farther from the seedling mounting surface in the thickness direction of the seedling mounting table (80). The seedling transplanting machine described.

  The invention which concerns on Claim 4 attaches the rail (121) for the right-and-left movement of a seedling mounting stand (80) to the back side of the seedling mounting surface of a seedling mounting stand (80), this rail (121), a scraper (29), The seedling transplanting machine according to any one of claims 1 to 3, wherein a common fastening member (31) for fastening the seedling to the seedling mounting table (80) is provided.

  The invention according to claim 5 is characterized in that the scraper (29) having a U-shaped cross section and having a groove in the lower part is mounted on the partition wall (80a) of the seedling stage (80). The seedling transplanter according to any one of claims 1 to 4.

  The invention according to claim 6 is characterized in that a spring (36) is arranged at a connecting portion between the scraper (29) and the lower end of the seedling stage (80). The seedling transplanter according to the item.

  According to the first aspect of the present invention, since the scraper 29 is attached to the lower end portion of the seedling mounting table 80, the scraper 29 is placed on the seedling receiving frame 81 when the seedling mounting table 80 is slid left and right along the seedling receiving frame 81. The adhering mud can be easily removed, and there is no possibility of damaging the seedling stage 80 by forcibly sliding the seedling stage 80.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, mud is deposited on the seedling receiving frame 81 because the plurality of grooves 29a are provided on the side surface of the scraper 29 in contact with the seedling receiving frame 81. Even when the seedling stage 80 moves along the seedling receiving frame 81, the lower end portion of the scraper 29 can be easily deformed and mud on the seedling receiving frame 81 can be removed.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or claim 2, the scraper 29 becomes narrower as it is separated from the seedling mounting surface in the thickness direction of the seedling mounting table 80. Therefore, the mud can be easily crushed, and the mud can be easily pushed out from the seedling receiving frame 81 toward the tip of the scraper 29, so that the mud can be easily removed.

  According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, the rail 121 on the back side of the seedling mounting surface of the seedling mounting base 80 and the scraper 29 are shared. Since the fastening member 31 is fastened to the seedling stage 80, not only the seedling stage 80 and the scraper 29 but also the rail 121 can be attached to the seedling stage 80 at the same time, and the strength of the rail 121 can be increased as compared with the prior art.

  According to the invention described in claim 5, in addition to the effects of the invention described in any one of claims 1 to 4, the scraper 29 is a high-strength scraper 29 because the scraper 29 is a member having a U-shaped horizontal cross section. Is obtained.

According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, the spring 36 is disposed at the connection portion between the scraper 29 and the lower end portion of the seedling stage 80. Thus, if there is an obstacle on the seedling receiving frame 81, the scraper 29 can easily get over the obstacle even if the seedling mounting table 80 is moved along the seedling receiving frame 81, and the seedling mounting table 80 is damaged. There is no fear.

It is a side view of the rice transplanter of one example of the present invention. It is a top view of the rice transplanter of FIG. It is a front view which shows clearly the seedling feeding transmission structure of the seedling mounting stand of the rice transplanter of FIG. It is a cross-sectional side view which shows clearly the seedling transfer amount changing apparatus of the seedling mounting stage of the rice transplanter of FIG. 1 is a partial vertical cross-sectional view of the seedling mounting platform and seedling receiving frame portion of the rice transplanter in FIG. 1 (viewed from the left side in the forward direction of the machine body) (FIG. 5A) and a side view of the scraper (FIG. 5 ( It is a figure (FIG.5 (c)) which shows the scraper seen from the arrow S direction of b)) and FIG.5 (b). ) It is the longitudinal side sectional view (figure seen from the left side toward the advancing direction of a machine body) which shows the part which cut the lower end part of the seedling mounting stand of the rice transplanter of Drawing 1 with an oblique line. A side view of the scraper (FIG. 7 (a)) for covering from the underside of the seedling mount of the rice transplanter in FIG. 1, a view taken along the arrow S1 in FIG. 7 (a) (FIG. 7 (b)), and FIG. ) Is a sectional view taken along line S2-S2 (FIG. 7C). 1 is a side view (FIG. 8 (a)) for covering the seedling mount of the rice transplanter of FIG. 1 from below, FIG. 8 (a) is a view taken along the line S1-S1 (FIG. 8 (b)), FIG. 9 is a view taken along the line S2-S2 in FIG. 8A (FIG. 8C). FIG. 9 is a side sectional view (FIG. 9A) when a scraper is attached to the seedling mount of the rice transplanter in FIG. 1 and a view as seen from the direction of arrow S in FIG. 9A (FIG. 9B). It is a sectional side view at the time of attaching a scraper to the seedling mounting stand of the rice transplanter of FIG.

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 application system, and this riding type rice transplanter 1 is connected to a rear side of a traveling vehicle body 2 via a lifting link device 3. The seedling planting part 4 is mounted so as to be able to move up and down, and a main body part of the 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 including a pair of left and right front wheels 6 and rear wheels 7 which are 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, and a front wheel 6 is attached to a front wheel axle that protrudes outward from a pair of left and right front wheel support portions that can change the direction of the front wheel final case 9. Further, the 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 wheels are supported by a pair of left and right rear wheel rolling shafts provided horizontally at the front and rear center of the rear end of the main frame 10. A rear wheel gear case 12 is supported in a freely rolling manner, and a rear wheel 7 is attached to a rear wheel axle that protrudes outward from the rear wheel gear case 12.

  The engine 13 serving as a prime mover is mounted on the main frame 10, and a hydraulic forward / reverse continuously variable transmission serving as a transmission device in which the rotational power of the engine 13 can be switched between forward and reverse via a belt transmission device 14. 15 is input. The output from the forward / reverse continuously variable transmission 15 is transmitted to the mission case 8. Rotational power transmitted to the mission case 8 is branched and transmitted to a traveling transmission path and a planting transmission path at a transmission branch portion in the transmission case 8, and separated into traveling power and external extraction power. It is.

  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 through the take-out transmission shaft 17, and then transmitted to the seedling planting unit 4 through the planting transmission shaft 19, and fertilizer is applied. It is transmitted to the fertilizer application device 5 by the 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 speed change lever 203 for operating the forward / reverse continuously variable transmission 15 is provided on the right side of the handle 23. In addition, the grip portion of the forward / reverse speed change lever 203 is provided with a planting raising / lowering operation switch capable of raising / lowering the seedling planting unit 4 and turning on / off the operation. The engine cover 20 and the front cover 22 have horizontal floor steps 26 on the left and right sides of the lower end. In addition, on the left and right sides of the front part of the traveling vehicle body 2, a spare seedling stage 27 on which supplementary seedlings are placed is provided.

  The lift link device 3 includes a single 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, and a vertical link 73 is provided at the front end side. It is connected. And the connecting 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 connected so that rolling is possible centering | focusing on the connecting shaft 74. An elevating air cylinder 76 is provided between a support member fixed to the main frame 10 and a tip of a swing arm integrally formed with the upper link 70, and the upper link 70 is expanded and contracted by expanding and contracting the elevating air cylinder 76. It rotates up and down and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

  The seedling planting section 4 has a six-row planting structure, a transmission case 77 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to supply seedlings one by one to the seedling outlet 78 of each row and for one horizontal row When all the seedlings are supplied to the seedling outlet 78, the seedling mount 80 for transferring the seedlings downward by the seedling feeding belt 79, and the seedling planting in which the seedlings supplied to the seedling outlet 78 are planted in the field by the seedling planting tool 37a. The apparatus 37 etc. are provided.

  As shown mainly in FIGS. 3 and 4, 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 the seedling receiving frame 81 provided in the left-right direction at the lower part on the back side. The seedling stage 80 includes a plurality of partition wall portions 80a (FIGS. 2 and 4) extending vertically, and is divided by the partition wall portion 80a to form seedling placement portions 80b (FIG. 2). It is configured to be able to carry 6 seedlings. The seedling receiving frame 81 is provided with six seedling outlets 78 for six strips. A lead cam shaft 82 that protrudes from both the left and right sides of the transmission case 77 and reciprocates the lead cam 82a in the horizontal direction by the power in the transmission case 77 is provided, and the lead cam 82a and the seedling mount 80 are connected to each other, and the lead cam shaft The seedling mounting base 80 reciprocates left and right by driving and rotating 82. The lead cam shaft 82 is supported by a transmission case 77 at one end left end thereof.

  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 back side of the seedling stage 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 the support rollers 122 are provided at appropriate positions along the upper left / right moving guide member 120, and are attached to an upper portion of the seedling support frame 123 fixed to the upper side of the transmission case 77. The lower left / right moving guide member 121 is placed on the seedling receiving frame 81 from above. Therefore, the seedling stage 80 is supported by the support roller 122 and the seedling receiving frame 81 so as to be movable in the left-right direction.

  The seedling stage 80 support frame 123 is provided with left and right moving end sensors 131 (FIG. 4) for detecting that the seedling stage 80 has reached the left and right moving ends. The partition wall portion 80a projecting to the back surface side of the direction end portion is configured to contact and detect.

  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 shafts 86 are provided for every two strips, and each ratchet mechanism 87 transmits rotation only in the direction in which the seedling feed belt 79 feeds the seedlings. Therefore, the seedling feeding belt 79 serves as a seedling transfer device that transfers the seedlings on the seedling mounting table 80 to the seedling receiving frame 81 side at the left and right moving ends of the seedling mounting table 80.

The drive mechanism of the seedling feeding belt 79 has the following configuration.
That is, drive side arms 88 that project from the left and right sides of the transmission case 77 to rotate are provided. The drive arm 88 on the right side of the transmission case 77 is rotationally driven via the lead cam shaft 82. Further, on the upper side of the seedling feed driving shaft 86, a relay shaft 89 in the left-right direction is provided for every two strips, and a driven arm 90 is attached thereto. 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, respectively.

  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 below and rotates the relay shaft 89 (FIG. 3) 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 operates by a predetermined amount. In addition, two driven arms 90 are provided on the same relay shaft 89 on the left and right sides with respect to one driving arm 88 so that the seedling mounting table 80 can transmit seedling feeding power at both ends of the right and left movement. It has been. When the driving side arm 88 moves away from the driven side arm 90, the relay shaft 89 and the driven side arm 90 return to the positions before driving by the tension of a spring (not shown) locked to the relay shaft 89.

  As for the link mechanism 94 and the ratchet mechanism 87, the right two portions are the right end of the seedling mounting base 80, and the central two portions are the right end of the third seedling mounting portion 80 b from the right and the left two portions. Is disposed at the left end of the seedling stage 80. Since the link mechanism 94 and the ratchet mechanism 87 for the two central strips are arranged to be shifted to the right and left side of the right side with respect to the seedling feeding transmission part 77a of the transmission case 77 that is offset to the left side of the left and right side, While the base 80 and the transmission case 77 are brought close to each other, it can be prevented from interfering with the transmission case 77. The ratchet mechanism 87 is provided with seedling feeding clutches (not shown) for turning on and off the driving of the seedling feeding belts 79 for two strips. Therefore, a seedling feeding clutch wire 132 (FIG. 3) for operating the seedling feeding clutch is provided along the seedling mounting table 80 on the back side of the seedling mounting table 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 (FIGS. 1 and 2) for turning on and off the planting every two strips. A total of three hook clutch levers 133 are provided at the rear of the traveling vehicle body 2, and the operation position can be detected by each hook clutch lever sensor (not shown).

  In addition, on the front side of the seedling mounting table 80 of the seedling planting unit 4, the seedling receiving frame 81 is moved up and down so that the seedling planting device 37 (FIGS. 1 and 2) takes out seedlings per strain taken out from the seedling outlet 78. A seedling removal amount adjustment lever 201 (FIG. 1) for changing the amount is provided. A seedling removal amount adjustment lever sensor (not shown) detects the operation position of the seedling removal amount adjustment lever 201.

  Two drive side arms 88 are provided on the left and right sides at appropriate positions on both the left and right sides of the seedling feeding transmission portion 77 a 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 left and right movement right end, and when the seedling stage 80 moves to the left and right movement left end, It 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 and right movement left end, and when the seedling stage 80 moves to the right end of right and left movement, It hits the driven arm 90 on the right side 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 drive side arms 88 is reduced to four with respect to the total of six driven side arms 90.

  Here, 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, but the left and right driven arms 90 of the left and right central relay shafts 89 are The relay shaft 89 is disposed at both left and right ends. As a result, power can be transmitted from the drive side arms 88 on the left and right sides of the transmission case 77 to the relay shaft 89 on the left and right sides of the transmission case 77, and the drive side arm 88 on the left and right sides can be transferred to the left and right relay shafts 89. Can also be used as an arm to transmit power to In addition, the left and right driven arms 90 of each relay shaft 89 can be disposed at positions that are substantially bilaterally symmetric with respect to each relay shaft 89, and by a seedling movement amount changing motor 135, which will be described later, disposed approximately at the center of the left and right for each two strips. The seedling feed amount can be changed and set with high accuracy.

  A seedling reduction sensor 136 (FIGS. 2 and 4) is provided at an appropriate position near the seedling feeding belt 79 of the seedling mounting portion 80b of each row of the seedling mounting base 80. The seedling reduction sensor 136 detects that the seedling has been reduced at an appropriate position on the seedling stage 80 by detecting the presence or absence of the seedling. In addition, seedling movement amount sensors 137 (FIGS. 1 to 3) are respectively provided at appropriate positions near the seedling feeding belt 79 of the first, fourth and sixth seedling mounting portions 80b from the right. This seedling movement amount sensor 137 is provided at the tip of a sensor mounting arm 146 (FIG. 3) urged to the side rotated by the spring 138 (FIG. 3), and the outer peripheral surface is in contact with the bottom surface of the seedling. And a rotation angle detection type sensor potentiometer that detects the rotation angle of the roller, and detects the amount of movement of the seedlings on the seedling mounting base 80 in the seedling transfer direction of the seedling feeding belt 79. The seedling movement amount sensor 137 is configured such that the outer peripheral length of the seedling movement amount sensor 137 becomes larger than the maximum amount of seedlings transferred by the seedling feeding belt 79 by a seedling transfer amount changing motor 135 described later.

The seedling movement amount sensor 137 is a sensor that detects the rotation angle as an angle value of 0 degree or more and less than 360 degrees, and detects the amount of seedling movement from the angle value before and after the seedling feeding operation. In order to be able to detect even when the angle value of 0 degrees is crossed by a control device (not shown), 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 The following equation (1) is calculated by adding both differences of
Amount of movement of seedling = {360 degrees−angle value before seedling feeding operation} + {angle value after seedling feeding operation−0 degree} (1)
Thus, the amount of movement of the seedling can be detected with a simple sensor potentiometer that only detects the angle value.

  Further, 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, which also serves as a protective frame for the seedling movement amount sensor 137, The motor support frame 139 is also provided as a protective frame for the seedling feeding clutch wire 132 by providing the seedling feeding clutch wire 132 (FIG. 3) inside the motor support frame 139. It has a configuration.

  The seedling movement amount sensor 137 is located at the left and right center of the seedling placement portion 80b. The seedling reduction sensor 136 is located at the left and right center of the seedling placement portion 80b in the seedling placement portion 80b where the seedling movement amount sensor 137 is not provided, but in the seedling placement portion 80b provided with the seedling movement amount sensor 137 It is located at one side 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 left and right 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 strip is disposed at an upper position slightly along the seedling mounting base 80 from the seedling movement amount sensor 137.

  Each seedling amount sensor 140 (FIG. 3) for determining the amount of seedlings on the seedling mounting portion 80b is provided above the seedling feeding belt 79 of the seedling mounting portion 80b provided with the seedling movement amount sensor 137. Yes. This seedling amount sensor 140 is provided at an upper position (position 58 cm from the seedling receiving frame 81) one seedling along the seedling mounting base 80 from the seedling receiving frame 81, and detects the presence or absence of the seedling at that position. The size of the seedling on the seedling stage 80 is determined. The seedling amount sensor 140 is located at the left and right center of the seedling mounting portion 80b.

  A seedling transfer amount changing motor 135 (FIG. 3, FIG. 3) is provided on the back side of the partition wall portion 80a at the center of the right and left in each two-row seedling mounting portion 80b. FIG. 4) is provided. This seedling transfer amount changing motor 135 is a seedling transfer amount changing device for changing the amount of seedling transferred by the seedling transferring device. Since the seedling transfer amount changing motor 135 is arranged at the center of the left and right for each two strips, the seedling feed amount can be changed appropriately and accurately for each two strips. A fan-shaped gear 141 that meshes with and rotates with the pinion 135a (FIG. 4) of the seedling transfer amount changing motor 135 is provided, and a seedling feed restricting arm 143 that rotates integrally with the relay shaft 89 from the sector gear 141 via the connecting rod 142 (FIG. 4). 4). The connecting rod 142 is connected to a long hole (not shown) provided in the seedling feed restricting arm 143. Accordingly, when the seedling transfer amount changing motor 135 is driven to rotate the fan-shaped gear 141 and the seedling feeding restricting arm 143 is forcibly turned upward through its long hole (not shown), the seedling feeding operation is performed. The relay shaft 89 can be rotated by the long hole. When the driving side arm 88 moves away from the driven side arm 90, the relay shaft 89 and the driven side arm 90 are placed at the end of a long hole (not shown) serving as a restricting member by the tension of the spring (not shown). It is the structure which returns to the position where the edge part of the connection rod 142 contacts. The seedling feed restriction arm 143 is composed of the right two driven side arms 90, the left two pieces are also used as the left driven arm 90, and the central two pieces are dedicated central seedling feeding restriction arms 144. is doing. 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 (FIG. 4) of the seedling mounting table 80, there is provided a seedling presser 130 (FIG. 4) 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 appropriately presses the mat seedling toward the seedling feeding belt 79 so that the seedling feeding belt 79 can reliably transfer the mat seedling with high accuracy.

  At the lower part of the seedling planting part 4, a center float 100 for leveling the seedling planting positions for the central two strips and a side float 101 for leveling the seedling planting positions for the two left and right outer strips are provided. When the aircraft is advanced while these floats, center float 100 and side float 101 are in contact with the mud surface of the field, the center float 100 and side float 101 slide while leveling the mud surface, and the ground level remains. A seedling is planted by the seedling planting device 37. Each float is pivotally attached so that the front end side moves up and down according to the unevenness of the soil surface of the field, and during planting work, the vertical movement of the front part of the center float 100 is detected by the vertical movement detection mechanism, The planting depth of the seedling is always maintained constant by switching the hydraulic valve that controls the lifting air cylinder 76 according to the detection result to raise and lower the seedling planting unit 4.

  The fertilizer applicator 5 feeds the fertilizer stored in the fertilizer storage tank 110 by a certain amount by the fertilizer feed section 63 of each strip, and applies the fertilizer to the center float 100 and the side float 101 by the fertilizer transfer hose 111. It is discharged to the fertilization groove formed near the side part of the seedling planting line by the groove body 113 provided on the front side of the fertilization guide 112. The pressure air generated by the blower 115 driven by the motor 114 is blown into the fertilizer transfer hose 111 via the air chamber 116 which is long in the left-right direction, and the fertilizer in the fertilizer transfer hose 111 is discharged from the seedling planting part 4 side. It is forcibly transferred to the outlet fertilizer guide 112. The fertilizer supplied in 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.

  It is desirable that the fertilizer application guide 112 and the grooved body 113 of each strip have a uniform positional relation distance with the corresponding seedling planting device 37 so as to uniformize the fertilization effect of each strip. At the same position. Similarly, it is desirable that the distance of the positional relationship between the fertilization guide 112, the groove producing body 113, and the seedling planting device 37 is also uniform for the cover plate 117 of each strip. This is because if the cover plate is positioned too close to the fertilizer guide, 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.

  5A is a partial vertical cross-sectional view of the seedling stage 80 of FIG. 5A and a seedling receiving frame portion on which the seedling stage 80 is placed (viewed from the left side in the forward direction of the machine body). FIG. 5B shows a side view of the scraper 29 in FIG. 5B and FIG. 5C shows the scraper 29 viewed from the direction of arrow S in FIG. FIG. 6 is a vertical cross-sectional view (a diagram viewed from the left side in the forward direction of the machine body) showing a portion where the lower end portion of the seedling mounting base 80 is cut by a dotted line.

  The scraper 29 is fixed from both sides of the front and back surfaces of the seedling table 80 with the insertion bolts 30 and the tapping screws 31 from the cut portion at the lower end of the seedling table 80 to the upper side of the seedling table 80. The material of the scraper 29 may be a metal such as iron or rubber that is inferior in durability but is an elastic material.

If mud enters a small gap between the seedling receiving frame 81 and the seedling mounting table 80 and is fixed, the seedling mounting table 80 cannot be slid or may be damaged if it is forcibly slid.
However, since the scraper 29 is attached to the lower end portion of the seedling stage 80, mud adhered to the seedling receiving frame 81 by the scraper 29 can be easily removed when the seedling stage 80 is slid to the left and right. Further, when a plurality of grooves 29a are provided on the lower side of the scraper 29 as shown in FIGS. 5B and 5C, even if mud is accumulated on the seedling receiving frame 81, the seedling mounting base 80 can be mounted on the machine body. The lower end portion of the scraper 29 can be easily deformed to remove mud on the seedling receiving frame 81 each time it moves in the left-right direction (the direction along the seedling receiving frame 81) with respect to the forward direction.

  Further, as shown in FIG. 5C, the scraper 29 becomes narrower as it moves away from the seedling mounting surface in the thickness direction of the seedling mounting table 80, so that mud is easily crushed, and the seedling at the tip of the scraper 29 is also removed. The further away from the seedling mounting surface of the mounting table 80, the easier the mud is pushed out from the seedling receiving frame 81, and the mud can be easily removed. Further, by increasing the width of the groove 29a in the thickness direction of the seedling stage 80, mud can be removed easily.

  When the scraper 29 is fixed to the lower end portion of the seedling stage 80 with the tapping screw 31, a rail 33 for moving the seedling stage 80 in the left-right direction is attached to the rear side of the seedling stage 80, and the seedling stage of the rail 33 is mounted. When the tapping screw 31 is attached from the back side of the seedling mounting table 80 through the side surface portion by making the side surface portion in contact with the back surface of the 80 comparatively long, not only the scraper 29 but also the rail 33 is simultaneously attached to the seedling mounting table 80. It can be attached, and the strength of the rail 33 can be increased as compared with the prior art.

  Further, in order to cover the scraper 29 made of steel on the seedling stage 80 from below, a side view of FIG. 7A, a view taken in the direction of arrow S1 in FIG. 7A shown in FIG. 7B, and FIG. When a member having a U-shaped cross section is used, as shown in FIG. 7A, the scraper 29 having high strength is obtained.

  Furthermore, in order to cover the steel scraper 29 on the seedling stage 80 from below, a side view of FIG. 8A, a view taken along the line S1-S1 in FIG. 8A shown in FIG. A member having a U-shaped cross section may be used as shown in the view of the arrow S2 in FIG.

  FIG. 9A is a side sectional view (FIG. 9A) when the scraper 29 is attached to the seedling mounting table 80 in FIG. 9A, and FIG. 9A is a view seen from the direction of arrow S (FIG. 9B). As shown in the drawing, a steel scraper 29 having a U-shaped cross section is prepared, and the plane of the scraper 29 is disposed facing the lower end plane of the seedling stage 80, and a spring 36 is attached between the planes. The lower end of the scraper 29 may be in contact with the upper surface of the seedling receiving frame 81.

  In this case, if there is an obstacle d on the seedling receiving frame 81, the scraper 29 can easily get over the obstacle even if the seedling mounting base 80 is moved left and right.

  As shown in the longitudinal sectional view when the scraper 29 is attached to the seedling stage 80 as viewed from the side of the machine body in FIG. 10, a rectangular groove is formed by hollowing out the lower end of the seedling stage 80. A scraper 29 is inserted into the rectangular groove cut out from the opening at the lower end of the seedling stage 80, and is tightened to the scraper 29 with a bolt 30 from the outside of the rear part of the opening at the lower end of the seedling stage 80. The scraper 29 is fixed to the seedling stage 80. At this time, the lower end portion of the scraper 29 is attached so as to protrude from the lower end portion plane of the seedling stage 80. Further, a bolt groove 80a is formed in the scraper 29 so that a space is formed in the scraper 29 on the tip side of the bolt 30 that is bolted, and the spring 36 is disposed in the groove 80a before bolting.

  In the case of the above configuration, the scraper 29 can be moved in the front-rear direction by the action of the spring 36 even if there is an obstacle d between the seedling receiving frame 81 on the front side of the machine body and the seedling mounting base 80 as shown in FIG. There is no possibility that the seedling receiving frame 81 and the seedling mounting table 80 are damaged.

  Although the embodiment of the present invention has been described with respect to the riding type rice transplanter 1, the present invention is not limited to the riding type rice transplanter and is highly applicable to various working machines.

DESCRIPTION OF SYMBOLS 1 Rice transplanter 2 Traveling vehicle body 3 Lifting link apparatus 4 Seedling planting part 5 Fertilizer 6 Front wheel 7 Rear wheel 8 Mission case 9 Front wheel final case 10 Main frame 12 Rear wheel gear case 13 Engine 14 Belt transmission 15 Forward / reverse continuously variable transmission 17 Take-out transmission shaft 18 Planting clutch case 19 Planting transmission shaft 20 Engine cover 21 Seat 22 Front cover 23 Handle
26 Floor step 27 Preliminary seedling stage 29 Scraper 29a Groove 30 Insertion bolt 31 Tapping screw 33 Rail 36 Spring 37 Seedling planting device 37a Seedling planting tool 63 Fertilizer feeding part granular material feeding part 70 Upper link 71 Lower link 72 Link base Frame 73 Vertical link 74 Connecting shaft 76 Elevating air cylinder 77 Transmission case 77a Seedling feed transmission part 78 Seedling outlet 79 Seedling feed belt 80 Seedling mounting stage 80a Partition wall 80b Seedling mounting part 80c Seedling mounting surface 81 Seedling receiving frame 82 Lead cam shaft 82a Lead cam 84 Drive roller 85 Driven roller 86 Seedling feed drive shaft 87 Ratchet mechanism 88 Drive side arm 89 Relay shaft 90 Driven side arm 91 First arm 92 Second arm 93 Link 94 Link mechanism 100 Center float 101 Side float 110 Fertilizer storage tank 111 Fertilizer transfer hose 112 Fertilizer guide 113 Groove body 114 Motor 115 Blower 116 Air chamber 117 Cover plate 120 Upper left and right moving guide member 121 Lower left and right moving guide member 122 Support roller 123 Seedling support frame 130 Seed holder holder 131 Moving end sensor 132 Clutch wire 133 畦 Clutch lever 135 Seedling transfer amount change motor 135a Pinion 136 Seedling reduction sensor 137 Seedling movement amount sensor 138 Spring 139 Motor support frame 140 Seedling amount sensor 141 Fan-shaped gear 142 Connecting rod 143 Seedling feed restriction arm 144 Center Seedling feed restriction arm 146 Sensor mounting arm 201 Seedling amount adjustment lever 203 Forward / reverse speed change lever

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) In a seedling transplanter provided with a seedling mount (80) for supplying seedlings to the seedling outlet (78) and a seedling planting device (37) for planting seedlings supplied to the seedling outlet (78), A seedling transplanting machine, wherein a scraper (29) for scraping off the soil on the seedling receiving frame (81) is attached to the lower end of the seedling placing stand (80).   One or more grooves (29a) facing the seedling receiving frame (81) are provided on the side surface of the scraper (29) in contact with the seedling receiving frame (81) in a direction away from the thickness direction of the seedling mounting base (80). The seedling transplanting machine according to 1.   The seedling transplanter according to claim 1 or 2, wherein the cross-sectional shape of the scraper (29) is made narrower as the distance from the seedling placing surface in the thickness direction of the seedling placing stand (80).   A rail (121) for left-right movement of the seedling stage (80) is attached to the back side of the seedling stage of the seedling stage (80), and the rail (121) and the scraper (29) are attached to the seedling stage (80). The seedling transplanter according to any one of claims 1 to 3, wherein a common fastening member (31) for fastening is provided.   5. The scraper (29) having a U-shaped cross section and having a groove in the lower part is mounted on the partition wall (80 a) of the seedling stage (80). The seedling transplanter according to claim 1.   The seedling transplanter according to any one of claims 1 to 5, wherein a spring (36) is arranged at a connecting portion between the scraper (29) and a lower end portion of the seedling placing stand (80).

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