JP2013172696A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling transplanter for planting liana seedlings such as sweet potato seedlings held by a seedling planting holding tool in the longitudinal attitude, capable of easily adjusting the attitude of the seedling planting holding tool for holding the seedling and the position of the end part to plant the seedling in a suitable attitude and position.SOLUTION: A seedling planting device 6 of a seedling transplanter includes: a pair of seedling planting holding tools 31 provided at the end the seedling planting device and holding a seedling N sent from a seedling conveying portion 5 and a pair of holding tool holders 41 connected to the seedling planting holders 31 and operating the width of the seedling planting holding tools 31, wherein the holding tools and the holders are connected to each other on a longitutinal joint surface V as viewed from the back of the seedling transplanter.

Description

  The present invention relates to a seedling transplanter for transplanting vine-shaped seedlings such as sweet potato seedlings.

  A seedling transplanting machine is known in which vine-like seedlings such as sweet potato seedlings clamped by a seedling planting clamp are planted in a posture oriented in the front-rear direction parallel to the traveling direction of the aircraft while the aircraft is advanced by a traveling device (patent) Reference 1). In this seedling transplanting machine, the seedling planting clamp performs the transplanting operation by the following operation. First, the seedling planting clamp clamps the seedling and descends into the soil. Then, it moves backward in the soil, and when it reaches a predetermined position, it releases the pinching of the seedling, rises in a state of releasing the pinching, and exits from the soil. By the above operation, it is possible to plant the seedling in a tilted posture in the front-rear direction.

JP 2009-89712 A

  The seedling planting angle and planting depth can be adjusted by adjusting the mounting angle of the seedling planting clamp and the position of the tip. The problem to be solved by the present invention is to provide a seedling transplanter that can easily adjust the mounting angle of the seedling planting clamp and the position of the tip.

The present invention has taken the following technical means to solve the above problems.
That is, the invention according to claim 1 is a seedling transporting part (5) for transporting a seedling (N) to a machine body provided with a traveling device (4), and a seedling (N In the seedling transplanting machine having a seedling planting device (6) for planting in the field, the seedling planting device (6) has a pair of sandwiching the seedling (N) from the seedling transport unit (5) at the tip thereof. A seedling planting clamp (31) and a pair of clamp tool holders (41) connected to these seedling planting clamps (31) and operating the width of the seedling planting clamp (31) are provided, and the seedling planting clamp It is a seedling transplanting machine characterized by connecting a tool (31) and the said holding tool holder (41) by the vertical joint surface (V) by a back view.

  The invention according to claim 2 is characterized in that a position adjusting bolt (151) for adjusting the position of the seedling planting clamp (31) along the longitudinal joining surface (V) is provided with the longitudinal joining surface (V). The seedling transplanter according to claim 1, wherein the seedling transplanter is provided on a plane perpendicular to the vertical axis.

  The invention according to claim 3 is characterized in that the longitudinal joint surface (V) is provided inside each of the pair of holding tool holders (41), the holding tool holder (41), and the seedling planting holding tool ( 31) The seedling transplanter according to claim 1 or 2, wherein a clamping pressure adjusting member (154) is provided between the first and second members.

  According to a fourth aspect of the present invention, the seedling planting device (6) is provided with a link mechanism (R) that causes a planting operation of a seedling transplanting portion having the seedling planting clamp (31), and this link mechanism. And a connecting shaft supporter (152) having a connecting shaft (40) that is an opening / closing operation fulcrum of the holding tool holder (41) on a support link part (36) that performs the same operation as the seedling planting holding tool (31). 2), and a positional deviation prevention guide (153) for restraining the vertical movement of the clamping tool holder (41) is provided at a position adjacent to the connecting shaft supporter (152). A seedling transplanting machine according to claim 3.

  The invention according to claim 5 is characterized in that the clamping tool holder (41) is joined to the coupling base (41a) with the seedling planting clamping tool (31) and the coupling base (41a), and the coupling shaft ( 40) and a stay portion (41b) that opens and closes, and the joint portion (F) between the coupling base portion (41a) and the stay portion (41b) is shifted in the vertical direction. A seedling transplanter according to any one of claims 1 to 4.

  According to the first aspect of the present invention, the seedling planting clamp (31) is formed by joining the seedling planting clamp (31) and the clamp holder (41) at the longitudinal joint surface (V) in the rear view. The adjustment operation of the claw portion at the tip of the tip is in a plane parallel to the longitudinal joint surface (V), and the attachment angle and planting depth of the seedling planting clamp (31) can be easily adjusted.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the position adjusting bolt (151) for adjusting the position of the seedling planting clamp (31) along the longitudinal joint surface (V). ) Is provided on a surface perpendicular to the longitudinal joint surface (V), it becomes easy to finely adjust the mounting angle and planting depth of the seedling planting clamp (31).

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the longitudinal joint surface (V) is provided inside each of the pair of holding tool holders (41), and the holding pressure is provided there. By sandwiching the adjustment member (154), fine adjustment of the clamping force of the seedling (N) can be performed.

  According to the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, the support link part (36) that performs the same operation as the seedling planting clamp (31), A connection shaft supporter (152) having a connection shaft (40) which is an opening / closing operation fulcrum of the holding tool holder (41) is provided, and the holding tool holder (41) is vertically moved at a position adjacent to the connection shaft supporter (152). By providing the misalignment prevention guide (153) that restricts the operation, it is possible to prevent misalignment of the seedling planting clamp (31) coupled to the tip of the clamp holder (41).

  According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, the joint portion (F) between the coupling base portion (41a) and the stay portion (41b), By shifting each other in the vertical direction, the stay portion (41b) can be configured to overlap with the connecting shaft (40). That is, cost reduction etc. are realizable by making a clamping tool holder (41) into a simpler structure.

It is a side view of the conventional sweet potato seedling transplanter. It is a top view of the sweet potato seedling transplanter of FIG. It is a rear view which shows the drive part of the seedling conveyance part of the sweet potato seedling transplanting machine of FIG. It is a perspective view which shows the seedling planting apparatus of the sweet potato seedling transplanting machine of FIG. It is a perspective view which shows the clip of the seedling transplanter of FIG. It is a top view which shows the seedling transplant part which concerns on one Embodiment of this invention. It is a sectional side view of the seedling transplanting part of FIG. It is a top view which shows the assembly method of the seedling transplanting part of FIG. It is an enlarged view of the position shift prevention guide of the seedling transplant part of FIG. It is a perspective view of the seedling transplant part concerning another embodiment. It is a side view of the link mechanism which operates the seedling transplanting part of FIG.

Embodiments specifically configured based on the above technical idea will be described below with reference to the drawings. In this case, in the plan view, it is referred to as right and left from the airframe toward the forward direction, and the rear view means a case where the airframe is viewed from the rear of the airframe. Details of each part will be specifically described below.

  FIG.1 and FIG.2 shows the conventional sweet potato seedling transplanter 1. FIG. The seedling transplanter 1 has a seedling transporting unit 5 for transporting a sweet potato seedling N and a seedling planting for planting the seedling N transported by the seedling transporting unit 5 on a field provided with a traveling device 4 and a steering handle 2. And a device 6. In the illustrated example, the traveling device 4 includes an engine 3, a pair of left and right rear wheels 7 that are driven and rotated by transmission of the power of the engine 3, and a pair of left and right front wheels that are rotatably supported in front of the rear wheel 7. 8 and so on.

  A mission case 9 is disposed at the rear portion of the engine 3, and the mission case 9 has a case portion extending from the left side portion to the left side of the engine 3, and this is connected to the left side portion of the engine 3. The output shaft of the engine 3 enters the case portion and the power is transmitted to the transmission mechanism in the transmission case 9. A transmission case 10 is rotatably attached to both left and right sides of the transmission case 9, and the tip of the wheel drive shaft extending from the transmission case 9 to the left and right outer sides enters the rotation center of the transmission case 10. Power for traveling is transmitted to the transmission mechanism in 10. The traveling power is transmitted to the axle 11 extending rearward of the machine body and projecting to the rear end side via the transmission mechanism in the transmission case 10, and the rear wheel 7 is driven to rotate. .

  The transmission case 10 is attached to the transmission case 9 integrally with an upwardly extending arm 12, which is attached to the tip of the piston rod of the lifting hydraulic cylinder 13 fixed to the transmission case 9 around the vertical axis. It is connected to the left and right side portions of the balance rod 14 that is rotatably attached. The right side of the connecting portion is connected by a rod 15, and the left side is connected by a left / right horizontal control hydraulic cylinder 16 which can be expanded and contracted.

  When the elevating hydraulic cylinder 13 is actuated and its piston rod protrudes rearward of the machine body, the left and right arms 12 are rotated rearward, and the transmission case 10 is rotated downward accordingly, and the machine body is raised. On the contrary, when the piston rod of the lifting hydraulic cylinder 13 is retracted forward, the left and right arms 12 are rotated forward, and accordingly, the transmission case 10 is rotated upward and the aircraft is lowered. The lifting hydraulic cylinder 13 is configured to operate the airframe to be a set height with respect to the height of the upper surface of the airframe based on the detection result of the sensor 17 that detects the height of the upper surface of the airframe. It is also configured to operate so as to raise or lower the aircraft by human operation of the planting lift lever 18 disposed in the vicinity of the steering handle 2. In addition, the said plant raising / lowering lever 18 can perform on / off operation of the drive of the seedling planting apparatus 6 and the seedling conveyance part 5. FIG. Further, on the side of the planting lift lever 18, there is provided a main clutch lever 19 that can operate a main clutch (not shown) in the mission case 9 to turn on and off the traveling device 4.

  Further, when the left / right horizontal control hydraulic cylinder 16 expands / contracts, the balance rod 14 rotates around the vertical axis connected to the tip of the piston rod of the lifting / lowering hydraulic cylinder 13 at the center of the left / right to transmit left / right transmission. The case 10 is moved up and down alternately to tilt the aircraft to the left and right. The left / right horizontal control hydraulic cylinder 16 is configured to operate the airframe horizontally so as to be horizontal based on a detection result of a sensor (not shown) that detects right / left inclination of the airframe relative to the left / right horizontal.

  The left and right front wheels 8 are fixed to the side of the lower end portion of the arm portion 21 that extends downward at the left and right sides of the front wheel support frame 20 that is pivotally mounted around the axial center in the front-rear direction at the left and right center position below the engine 3. It is rotatably attached to the axle 22. Therefore, the left and right front wheels 8 are capable of rolling around the longitudinal center of the left and right center of the aircraft.

  The steering handle 2 is attached to a rear end portion of a handle frame 23 whose front end portion is fixed to the mission case 9. The handle frame 23 is disposed at a position deviated from the right and left center of the machine body to the right side and extends rearward, and extends obliquely rearward and upward from the front and rear intermediate portion. The steering handle 2 extends rearward left and right from the rear end portion of the handle frame 23, and the rear end portions thereof serve as grip portions 2 a and 2 a of the steering handle 2. The left and right grip portions 2a, 2a of the steering handle 2 are set to an appropriate height so that the operator can easily grip the grip portions 2a, 2a with hands. In the example shown in the figure, the grip portions 2a, 2a are divided into left and right, but the left and right rear end portions of the steering handle 2 may be connected to each other left and right, and the connecting portion may be used as the grip portion.

  The traveling device 4 has a four-wheel configuration, but may have a two-wheel configuration including only a pair of left and right drive wheels, or may be a pressure-reducing wheel that rolls on the upper surface instead of the front wheels. Moreover, it is good also as a crawler type traveling apparatus.

Next, the seedling planting device 6 will be described with reference to FIGS.
The seedling planting device 6 includes a seedling planting clamp 31 and a seedling transplanting unit having a mechanism for opening and closing the seedling planting device 31 and a link mechanism R for operating the seedling transplanting unit.

  The drive unit that drives the link mechanism R of the seedling planting device 6 is provided in a planting transmission case 32 that includes a transmission mechanism that receives power for driving the link mechanism R from the transmission case 9 and transmits it. The planting transmission case 32 has a front portion connected to the rear portion of the transmission case 9 and extending rearward and obliquely upward therefrom, and a first case portion 32a fixed to the upper left portion of the first case portion 32a and extending leftward. It has two case parts 32b and a third case part 32c that is fixed to the left end of the second case part 32b and extends obliquely downward. A transmission mechanism for transmitting power for driving the link mechanism of the seedling planting device 6 is provided in the third case portion 32c from the first case portion 32a. The transmission structure in the third case portion 32c is transmitted from the input shaft 33 of the third case portion 32c to the relay shaft 111 via the chain 110, and from the relay shaft 111 via the pair of transmission gears 100 and 101. It is configured to be transmitted to the drive shaft 35 output from the case portion 32c. The third case portion 32c is rotatably provided around the output shaft of the second case portion 32b, that is, the input shaft 33 of the third case portion 32c. The seedling planting device 6 and the seedling transporting unit 5 are provided so as to be rotatable around the input shaft 33 of the third case portion 32 c with respect to the traveling device 4. Further, the transmission mechanism built in the first case portion 32a includes an intermittent drive mechanism (not shown) for stopping the seedling planting device 6 at a position where the seedling planting device 6 is moved up and down or in the vicinity thereof, and a seedling. A planting clutch (not shown) for stopping the planting device 6 and the seedling transporting unit 5 is provided. The time for stopping by the intermittent drive mechanism is adjusted by a speed change mechanism (not shown) provided in the intermittent drive mechanism, and the adjustment between the seedling planting stocks by the seedling planting device 6 is adjusted by this adjustment.

  The link mechanism R of the seedling planting device 6 includes four bars, that is, a support frame 38, a drive arm 34, a support link portion 36, and a swing link 37, and four pin elements that connect the respective bars. The drive arm 34 is attached to a drive shaft 35 that protrudes from the right side of the rear portion of the third case portion 32c so as to be driven and rotated by a set bolt 34a, and a seedling transplanting portion is implanted at the opposite end of the drive arm 34. The upper end portion of the support link portion 36 that causes the operation is rotatably connected, and the rear end portion of the swing link 37 is rotatably connected to the lower end portion of the support link portion 36. The front end portion of the swing link 37 is rotatably supported by a support shaft 39 provided at the rear end portion of the support frame 38 that is fixed to the third case portion 32c and extends rearward.

  The link mechanism R of the seedling planting device 6 is driven by the drive shaft 35, and when the drive arm 34 is rotated clockwise when viewed from the left side of the machine body, the seedling transplanting section that performs the same operation as the support link section 36 operates according to the link mechanism R. Then, as shown in FIG. 1, the seedling planting clamp 31 at the tip (bottom) is plunged into the soil from substantially above and moved backward in the soil, so that the bottom dead center position is reached. To the upper side of the trajectory of the rushing movement, moving backward and moving out upward from the soil while moving to the front side so as to pass near the trajectory. Will do. The trajectory T as shown in FIG. 1 is a motion trajectory (static trajectory) drawn by the seedling planting clamp 31 with respect to the airframe, and the trajectory T ′ is when the airframe travels forward at the set work speed. It is a movement locus (movement locus) which seedling planting pinching tool 31 draws with respect to a field. In the seedling transplanting machine of this configuration, the plane including the movement locus is a vertical plane from the field where the seedling is planted.

  As shown in the enlarged perspective view of the seedling planting device 6 in FIG. 4, the seedling transplanting section that performs the same operation as the support link section 36 includes a pair of holding tool holders 41 that are pivotally connected around the connecting shaft 40, A pair of seedling planting clamps 31 that are fixed to the distal end portion of the clamping tool holder 41 and clamp the seedling, and a pair of seedling planting clamp operating arms that are fixed to the opposite side of the clamping tool holder 41 from the seedling planting clamping tool 31 42. The clamp holder 41, the pair of seedling planting clamps 31, and the pair of seedling planting clamp operating arms 42 are configured to be slightly inclined forward and long in the vertical direction when viewed from the side of the machine body. Discs 42 a are provided at the upper ends of the seedling planting clamp operating arms 42, and the discs 42 a are in contact with the side surfaces of the opening / closing cam 43. The connecting shaft 40 is attached to the support link portion 36, and the protrusion 43a provided on the side surface of the opening / closing cam 43 comes into contact with the disc 42a, so that the distance between the pair of seedling planting clamp operating arms 42 is widened. In other words, the pair of holding tool holders 41 rotate around the connecting shaft 40 so that the distance between the pair of seedling planting holding tools 31 is increased. Accordingly, the pair of seedling planting clamps 31 are configured to clamp the seedling by the opening / closing cam 43 or release the clamping. A tension spring 44 is provided between the pair of holding tool holders 41, and the pair of seedling planting holding tools 31 are biased by the tension spring 44 toward each other. In addition, dimples are provided on the opposing surfaces of the seedling planting clamp 31 to make it easier to clamp the seedling.

  The opening / closing cam 43 is fixed to the distal end side of the drive arm 34 and rotates integrally with the drive arm 34. Therefore, when the cam 43 is rotated by the driving force from the transmission case 32c, the cam 43 protrudes at the planting supply position A to the seedling planting device 6 near the top dead center of the planting locus T (T ′). The portion 43a abuts against the seedling-planting clamp operating arm 42 and moves in the direction in which the distal ends of the pair of seedling-planting clamps 31 open, and then after the projection 43a, the tension spring 44 between the pair of clamp holders 41 The lower end of the vine t of the sweet potato seedling N at the planting supply position A (the rear end of the sweet potato seedling faces in the front-rear direction at the planting supply position) To do. The seedling planting clamp 31 is configured to embed the seedling in the soil while the seedling planting clamp 31 holds the seedling while the drive arm 34 rotates to the vicinity of the bottom dead center of the planting locus T (T ′). The front and rear postures are tilted forward so that the tip moves rearward, and the projection 43a of the cam 43 again comes into contact with the seedling planting clamp operating arm 42 in the vicinity of the bottom dead center, and a pair of seedling planting clamps The tip part of 31 moves in the opening direction, and the seedling N that has been sandwiched is released and transplanted into the soil.

  In addition, since the sweet potato seedling N is supplied to the planting supply position A in a posture facing in the front-rear direction by a seedling transporting unit 5 described later, the seedling planting device 6 directly puts the sweet potato seedling N in the front-back direction into the soil. The vine t of the sweet potato seedling N is transplanted in a posture inclined with respect to the soil surface D. Since the seedling planting device 6 is operated and planted on the planting locus T extending rearward and downward, the seedling is planted in a state of tilting forward. Thus, when increasing the forward inclination of the seedling planting posture and planting at the bottom of the ship, many roots of the seedlings are easily elongated, the number of sweet potatoes grown is increased, and when cultivating sweet potatoes such as processing, etc. This is useful when you want to grow a large number of sweet potatoes, even if the size of the sweet potatoes is small.

  Then, the pair of seedling planting clamps 31 and the support link portion 36 which are opened near the bottom dead center of the planting trajectory T (T ′) and release the seedlings are moved forward while further tilting the posture toward the forward tilted side. Although it moves, it moves in the middle of the movement and operates while changing the front / rear tilting posture to the side where it becomes a vertical posture, and moves upward and moves out to escape from the soil. Accordingly, since the seedling planting clamp 31 is close to the entry trajectory into the soil and the exit trajectory from the soil into the soil, the seedling planting clamp 31 is suitable for planting seedlings without making the planting holes in the field dark. Can be done.

  A pair of left and right pressure-reducing wheels 84 are provided behind the seedling planting device 6. The pressure wheel 84 is a free wheel, and is configured to suppress the soil above and to the left and right sides of the seedling planted in contact with the soil surface. The pressure wheel support frame is supported from the rear end of the support frame 38. 85 is provided. Therefore, the seedling planting device 6 and the seedling transport unit 5 that rotate around the input shaft 33 of the third case portion 32c of the planting transmission case 32 are supported by the grounding of the pair of left and right pressure wheels 84, and the unevenness of the soil surface D is supported. Following this, the seedling planting device 6 and the seedling transporting unit 5 are swung to be maintained at a predetermined height with respect to the soil surface D. In addition, since the weights of the seedling planting device 6 and the seedling transporting unit 5 act on the pressure-reducing wheel 84, the pressure-reducing wheel 84 can provide a sufficient pressure-reducing action. Moreover, as shown in FIG. 1, the suppression wheel 84 is arrange | positioned above the planting locus | trajectory T of the seedling planting apparatus 6, and since the positional relationship of the suppression wheel 84 and the planted seedling N approaches, it will become close, and the suppression wheel The pressure suppression by 84 can be maintained appropriately and the pressure suppression effect can be obtained satisfactorily.

  Next, the seedling transport unit 5 will be described with reference to FIGS. As shown in FIG. 3, the seedling transport unit 5 includes a plurality of seedling containers 26 in the seedling transport direction C that serve as seedling storage units that store the sweet potato seedlings N in a posture in which the vine t faces in the front-rear direction. The upper lateral feed unit 5a that transports the right side 26 on the upper side of the machine body, the lowering feed unit 5b that transports the seedling container 26 that has been transported by the upper lateral feed unit 5a to the lower side of the machine body, and the lowering feed unit 5b And an ascending feed portion 5c that transports the seedling container 26 that has been transported to the upper side of the machine body and returns it to the transport start end side of the upper lateral feed portion 5a. It is designed to be transported along. Further, the upper lateral feed portion 5a is configured to protrude leftward from the left front wheel 8 and the rear wheel 7, and the left end is the outermost end on the left side of the aircraft. Further, the rear end of the upper lateral feed portion 5 a is disposed at a position behind the left front wheel 8 and the rear wheel 7. Accordingly, the worker supplies seedlings to the upper lateral feed portion 5a on the rear side of the left rear wheel 7 and the upper lateral feed portion 5a. The conveyance path is inclined so that the upper lateral feeding part 5a is located on the rear side in a side view, and the seedling container 26 of the upper lateral feeding part 5a is located at a position close to the operator on the rear side of the seedling conveying part 5. Is arranged so that the operator can easily perform the seedling supply operation to the seedling container 26 of the upper lateral feed portion 5a. The seedling planting device 6 is configured to plant the seedling in the seedling storage unit 26 that has been transported to the planting supply position A at the lowest position of the transport trajectory of the seedling transport unit 5 by the descending feed unit 5b. Yes. The descending feed portion 5b is provided with a seedling fall prevention plate 45 that guides the seedling into the seedling accommodating portion 26 so that the seedling does not fall, supported by the support member 46 at the upper portion thereof.

  The seedling container 26 is shaped like a bowl that is long in the front-rear direction, and a receiving plate part 47 that serves as a receiving surface on which the seedling N is placed by the upper lateral feed part 5a and a side plate part 48 that serves as a surface that partitions the adjacent seedling container 26. And the upper lateral feed portion 5a has an open portion on the upper side. The seedling container 26 is made of resin so as not to damage the seedling to be stored. In addition, the receiving plate part 47 of the seedling container 26 is inclined so that the rear side is lower when positioned in the upper lateral feed part 5a, and the operator behind the seedling transport part 5 receives the upper lateral feed. The seedling supply operation to the seedling container 26 of the part 5a can be easily performed. Further, as shown in FIG. 2, the seedling regulating rod 115 in the left-right direction is connected to the center in the front-rear direction of the seedling container 26 so as to connect the both side plate parts 48 at the substantially center in the up-down direction of the left and right side plate parts 48. Provided. Accordingly, the operator simply places the vine t of the seedling N on the upper side of the seedling regulating rod 115 in the upper lateral feed portion 5a, and the bent side of the vine t of the seedling N becomes the lower side, which is the same as the bending of the vine t. The lower end of the vine t that bends to the side is bent downward, and the seedling can be supplied to the seedling container 26 in a desired state to be described later.

  Further, as shown in FIG. 5, the seedling container 26 has a shape opened to the front and rear, and is provided with a clip 49 that holds the rear end portion of the vine t of the seedling N at the rear end portion. The clip 49 is provided at a central position in the left-right direction of the seedling container 26, and includes a pair of left and right sandwiching bodies 50 and 52 that are integral with the seedling container 26 and protrude upward from the receiving plate portion 47. The pair of left and right holding members 50 and 52 are made of elastic rubber so as not to damage the vine t of the holding seedling N. When the operator pushes the seedling N downward, the right clamping body 52 bends to the side (right side) away from the left clamping body 50, and the seedling holding portion in which the vine t of the seedling N is a recess of the left clamping body 50 The seedlings are clamped and fixed by a pair of left and right sandwiching bodies 50, 52. The right holding body 52 is elastic when the seedling N is supplied to the seedling holding portion because the diameter of the vine t of the seedling N is larger than the distance between the pair of left and right holding bodies 50 and 52 of the seedling holding portion. The right sandwiching body 52 made of rubber with a certain amount is urged toward the left sandwiching body 50 and a sandwiching force acts on the vine t.

  A plurality of the seedling containers 26 are attached to the chain 54, and the chain 54 is provided with a pair of front and rear sprockets 55 and 56 on the left and right on the upper side of the machine body and a pair of front and rear on the left and right on the lower side of the machine body. It is wound around the sprockets 57 and 58. The left and right sprockets 55 and 56 on the upper side of the machine body are attached to shafts 59 and 60 supported by a support member 46 fixed to the support frame 38. The left and right sprockets 57 and 58 on the lower side of the machine body are attached to shafts 62 and 63 supported by a support plate 61 fixed to the support frame 38. When the upper right sprocket 56 is driven, the seedling transport unit 5 is driven so that the seedling container 26 moves in the set transport direction C.

  The drive unit 64 of the seedling transporting unit 5 is interlocked and connected via a interlocking rod 66 to the tip of an interlocking link 65 that swings up and down integrally with the swinging link 37. In addition, the seedling carrier 5 stops so that the seedling container 26 stops until the seedling planting clamp 31 of the seedling planting device 6 clamps the seedling until it descends, and the seedling container 26 moves at other times. Are provided to be intermittently driven.

  Therefore, when the seedling planting holder 31 of the seedling planting device 6 sandwiches the seedling and descends and plantes it in the soil, the seedling container 26 is stopped, so that the seedling can be smoothly taken out from the seedling container 26 and suitable. Certainly seedlings can be planted in the field. Thus, since the seedling planting device 6 or the member that operates by being coupled to the seedling planting device 6 and the drive unit 64 of the seedling transporting unit 5 are coupled to each other, the seedling transplanting machine includes the seedling planting device 6. And there is an advantage that the drive timing of the seedling transport unit 5 can be easily taken and the drive configuration of the seedling transport unit 5 can be simplified.

  In addition, a lower lateral feed portion 5d for horizontally conveying the seedling container 26 is provided on the lower side of the machine body during the transition from the downward feed portion 5b to the upward feed portion 5c, and planting is supplied to the lower lateral feed portion 5d. Position A is provided. Accordingly, during the transition from the descending feed part 5b to the ascending feed part 5c (in the illustrated example, the section conveyed by the lower right sprocket 58 and the lower left sprocket 57), the seedling container 26 is moved by the lower lateral feed part 5d. The seedling planting device 6 transplants the seedling N, which is conveyed in the horizontal direction on the lower side, and accommodated in the seedling container 26 in the field. Therefore, even if the position of the seedling container 26 at the time of planting the seedling planting device 6 to the seedling N due to a shift at the time of assembling or the like, the seedling planting device 6 is moved to the lowest end in the movement path and The seedling N of the seedling container 26 in the same posture can be planted, and the change in the seedling planting state can be minimized.

  On the front side of the seedling conveying unit 5, a seedling mounting table 82 is provided from the first case portion 32 a of the planting transmission case 32 through a seedling mounting table support frame 81. The sweet potato seedlings N are placed on the seedling stage 82 in a state of being accommodated in a storage box or the like, and the operator transfers the seedlings on the seedling stage 82 to the upper lateral feed part 5a of the seedling transport part 5. Supply.

  On the rear side of the seedling transport section 5, a transmission lever 83 is provided extending from the position of the transmission case 9 to the rear side so that the transmission mechanism in the transmission case 9 can be switched and the traveling speed of the traveling device 4 can be stepped. . The seedling transplanter 1 includes a traveling device 4, a seedling transporting unit 5, a seedling planting device 6, and a steering handle 2 at the rear, and the upper lateral feed unit 5 a of the seedling transporting unit 5 from the traveling device 4. The shift lever 83, which is an operation lever that passes through the space surrounded by the descending feed part 5b and the ascending feed part 5c and extends to the rear side of the seedling transport part 5, is provided. That is, the transmission lever 83 passes through a predetermined loop-shaped conveyance path of the seedling conveyance unit 5.

  As described above, in the conventional sweet potato seedling transplanting machine, the aircraft is self-propelled by the traveling device 4 with the left and right front wheels 8 and the rear wheels 7 straddling the cocoon, and the upper side of the seedling conveyance unit 5 of the self-propelled aircraft. Sweet potato seedlings N are supplied from an operator behind the left rear wheel 7 to walk the trough valley where the left front wheel 8 and the rear wheel 7 pass to the feeding part 5a. The seedling transport unit 5 transports the supplied seedling N, and the seedling planting device 6 plants the seedling N that has been transported to the planting supply position A by the seedling transport unit 5 in the field. The seedling transport unit 5 includes a plurality of seedling containers 26 in the seedling transport direction C, and the sweet potato seedlings N are stored in the seedling container 26 in a posture in which the vine t faces in the front-rear direction. An operator supplies the seedling N to the seedling container 26 that is transported in the left-right direction on the upper side of the machine body by the upper lateral feed section 5a. That is, the operator supplies the lower end portion of the vine t of the seedling N to the clip 49 and fixes the seedling to the seedling container 26. The seedling container 26 to which the seedlings are supplied is conveyed to the lower side of the machine body by the descending feeding unit 5b following the upper lateral feeding unit 5a. The seedling container 26 that has been transported by the descending feed part 5b is transported upward by the ascending feed part 5c and returns to the transport start end side of the upper lateral feed part 5a. In the seedling planting device 6, the seedling planting clamp 31 is moved up and down by the drive unit, and is attached to the rear end portion of the seedling N accommodated in the seedling container 26 that has been conveyed to the planting supply position A by the descending feed unit 5b. Acts on the rear side of the seedling container 26 to plant seedlings in the field. At this time, the seedling N is clamped and fixed by the clip 49 of the seedling container 26. Since the clamping force of the seedling planting holder 31 of the seedling planting device 6 is larger than the clamping force of the clip 49, the seedling planting is performed. The apparatus 6 moves the seedling to the rear side along the planting locus T so that the vine t of the seedling N is detached from the clip 49.

  When transplanting this sweet potato seedling, an operator fixes the lower end portion of the seedling vine t to the clip 49 of the seedling container 26 in the upper lateral feed portion 5a of the seedling transporting portion 5 and supplies it. If the lower end of t is supplied in a state of being directed downward, the seedling is transported by the seedling transport unit 5 so that the lower end of the vine t is directed upward at the planting supply position A, and the leaves of the seedling are on the upper side with respect to the vine. Turn to. And a seedling is transplanted in soil with the seedling planting apparatus 6 with the posture. Therefore, since the process of transporting the seedlings into the soil of the seedling planting device 6 is simple, the vines are less likely to be bent or twisted, and the transplanting accuracy is improved, and the leaves are intensively directed upward with respect to the inclined vines. Can be transplanted with sweet potato seedlings Further, since the pair of seedling planting clamps 31 extending vertically sandwich the lower end of the vine t bent upward in the state of being inclined forward at the planting supply position A, the vine t bent in the direction of the seedling planting clamp 31 It can be in a state close to the vertical direction with respect to the direction of the lower end of the plant, and even if the position of the seedling is slightly deviated at the planting supply position A, it is possible to ensure the clamping and stabilization of the seedling, and to have an appropriate posture It is possible to plant seedlings and to transplant stable seedlings.

  Therefore, since the sweet potato seedlings N can be transplanted with the leaves intensively directed to the inclined vine t, the transplanted seedling leaves protrude out of the soil and receive light such as sunlight. The roots are vigorously grown and good growth can be achieved. In addition, since the direction of the leaf with respect to the axis of the vine is determined by the direction of the lower end of the vine that tends to bend, it is easy to determine the direction of the leaves and transplant the seedling to the clip 49. The working efficiency of the seedling supply work to the seedling container 26 of the person is improved, the seedling transporting section 5 can be operated at a high speed so as to improve the transplanting work efficiency, and the working efficiency of the seedling transporting work of the seedling transporting section 5 is improved. Improvements can be made.

  The walking seedling transplanter has been described in detail above, but a riding seedling transplanter including a seat on which an operator sits may be used.

  The seedling planting apparatus 6 which is one embodiment of the invention according to the present application will be described with reference to FIGS. The part which abbreviate | omitted description is the same as the structure and operating method of the conventional seedling transplanter. The seedling planting device 6 includes a seedling transplanting unit and a link mechanism R as in the conventional case. The seedling transplanting part is composed of a seedling planting clamping tool 31 and an opening / closing mechanism thereof, and the link mechanism R causes a planting operation of the seedling transplanting part. FIG. 6 is a top view showing the seedling transplanted portion, and FIG. 7 is a side sectional view of the seedling transplanted portion taken along the line JJ. 8 is a top view showing a method of assembling the seedling planting clamp 31 and the support tool holder 41 constituting the seedling transplanting portion, and FIG. 9 is a position shift prevention provided at the seedling transplanting portion at the KK cut surface. It is an enlarged view of the guide 153. For convenience, in the description of the seedling planting device 6 according to the present invention, the axial direction of the connecting shaft 40 is the vertical direction.

  The seedling transplanting portion according to the present invention includes a pair of seedling planting clamps 31 that clamp the vine-shaped seedling N, and a pair of clamping tools that are connected to the seedling planting clamp 31 and operate the width of the seedling planting clamp 31 Holder 41. And the seedling planting clamping tool 31 and the clamping tool holder 41 are coupled to each other at the longitudinal joint surface V in the rear view. In the present embodiment, the longitudinal joint surface V is a substantially vertical surface parallel to the traveling locus of the traveling device 4, and is a surface substantially parallel to the surface including the operation locus of the link mechanism R that causes the transplanting operation of the seedling transplanting portion. With the above configuration, the attachment angle and planting depth of the seedling planting clamp 31 in the direction indicated by the arrow in FIG. 7 can be easily adjusted. Further, in the present embodiment, of the two bolt holes provided in the joining base portion of the seedling planting clamp 31, the hole closer to the tip of the seedling planting clamp 31 is a long hole. By setting it as said structure, the adjustment allowance of the nail | claw part of the front-end | tip of the seedling planting clamping tool 31 can be enlarged.

  Further, the joining base portion of the seedling-planting sandwich tool 31 has an L-shaped structure, and this longitudinal joint is formed on one side of the L-shaped structure and above the sandwich tool holder 41 and perpendicular to the longitudinal joint surface V. A position adjustment bolt 151 for adjusting the position of the seedling planting clamp 31 along the surface V is provided. With the above configuration, it becomes easy to finely adjust the mounting angle and planting depth of the seedling planting clamp 31. In addition, although it was set as the structure which has the position adjustment volt | bolt 151 above the clamping tool holder 41, even if it is the structure which exists in the downward direction or the side, there is no problem.

  As shown in FIG. 8, the seedling planting clamp 31 is configured to be attached to the longitudinal joining surface V inside the two clamp tool holders 41, and a sandwiching pressure adjusting member 154 such as a shim is sandwiched between the seedling planting clamps The clamping pressure by the tool 31 can be adjusted. By setting it as the said structure, while being able to make the whole seedling transplant part compact, fine adjustment of clamping pressure can be performed. In this embodiment, a shim is used as the clamping pressure adjusting member 154, but there is no problem even if a structure having a certain thickness such as a spacer is used.

  Two spring mounting pins 155 for receiving the tension spring 44 are provided above the holding tool holder 41 so that the tension spring 44 is passed to the opposing holding tool holder 41 so that the holding force is urged. The position adjusting bolt 151 is provided at a position avoiding the two spring mounting pins 155 in plan view. In the present embodiment, the position adjusting bolt 151 is provided at the center of the two spring mounting pins 155, but it is also possible to provide the position adjusting bolt 151 on the side closer to the tip of the seedling planting clamp 31 than the two spring mounting pins 155. .

  As shown in FIG. 8, the holding tool holder 41 includes a coupling base part 41 a with the seedling planting holding tool 31 and a stay part 41 b. The stay portion 41b has one end joined to the coupling base portion 41a by welding. Further, the joint portion F between the paired coupling base portion 41a and the stay portion b is configured to be shifted from each other in the vertical direction. The connecting shaft 40 serving as an opening / closing operation fulcrum of the holding tool holder 41 is positioned at a substantially central portion in the longitudinal direction of the stay portion 41b, and couples the pair of holding tool holders 41 so as to be rotatable about the connecting shaft 40. In addition, a grease-filled bearing 42b is provided at the other end of the stay portion 41b, the outer periphery of the bearing 42b abuts on the opening / closing cam 43, and the protrusion 43a of the opening / closing cam 43 causes a gap between the bearings 42b. The distance between the seedling planting clamps 31 is increased by increasing.

  As described above, by shifting the joint portion F in the vertical direction, it is possible to configure the stay portion 41b so as to overlap each other in the connecting shaft 40 portion. That is, cost reduction etc. are realizable by making the clamping tool holder 41 into a simpler structure.

  The connecting shaft 40 is fixed by a connecting shaft supporter 152 coupled to the support link portion 36, and the support link portion 36 constitutes a link mechanism R and causes the seedling planting clamp 31 to perform a seedling planting operation. In addition, the support link portion 36 is provided with a misalignment prevention guide 153 that restrains the vertical movement of the holding tool holder 41 at a position adjacent to the connecting shaft supporter 152. As shown in FIG. 9, the stay portion 41b of the holding tool holder 41 is sandwiched at positions shifted from each other in the vertical direction, thereby restraining the vertical movement of the stay portion 41b. Further, the stay portion 41b is configured to have a vertical gap. With the configuration described above, it is possible to prevent the positional deviation of the seedling planting clamp 31 that is coupled to the tip of the clamp holder 41. The misalignment prevention guide 153 is provided with a reinforcing plate 156 and is configured to be removable to ensure maintainability.

  Between the connecting shaft 40 fixed to the connecting shaft supporter 152 and the stay portion 41b, metal bushes 157 having a height direction of 20 mm and 30 mm according to the two stay portions are provided.

A seedling transplanting part according to another embodiment will be described with reference to FIGS.
The seedling transplanting portion according to the present embodiment includes a seedling planting clamp 31 that clamps the seedling N, and a clamping tool holder 41 that is connected to the seedling transplanting clamp 31 and operates the width of the seedling planting clamp 31. And this seedling planting clamping tool 31 uses the member which comprises L shape, when it sees from the seedling planting clamping tool 31 like an equilateral mountain shape steel. With the above configuration, it is possible to reduce the weight while securing the rigidity of the holding tool holder 41. The tension spring 44 for securing the clamping pressure is provided with a plurality of holes in the L-shaped rising portion and across the opposing clamping tool holder 41. The plurality of holes are provided in order to adjust the holding force by the tension spring 44.

  In addition, at least one of the two bolt holes for connection provided in the joining base portion of the seedling planting clamp 31 is a long hole. By the said structure, the adjustment allowance of the seedling planting clamping tool 31 can be enlarged.

  In the present embodiment, the holding tool holder 41 can be rotated about two connecting shafts 40 provided as a fulcrum, and a gear 158 is provided at a contact portion between the two holding tool holders 41. By providing the two connecting shafts 40, when the seedling planting clamp 31 is opened, the seedling planting clamps 31 become substantially parallel, and the seedling N can be appropriately removed from the seedling planting clamp 31. Further, by providing the contact portion with the gear 158, the movement of the holding tool holder 41 can be appropriately restricted, the holding force can be properly transmitted to the seedling N, and the seedling N can be reliably held.

  The wide and narrow operation of the holding tool holder 41 is performed by operating the wire 159 between the ends of the holding tool holder 41 opposite to the ends to which the seedling planting holding tool 31 is connected. By doing. Since the tension spring 44 is urged in the direction to reduce the interval between the seedling planting clamps 31, by operating the wire 159 in the direction to increase the interval, that is, in the direction to decrease the interval between the ends, Hold N. By comprising in this way, the space | interval of the seedling planting clamping tools 31 can be enlarged. The wire 159 is configured to be operated by a wire operation cam 160 provided on the side portion of the planting transmission case 32. With the above configuration, the entire seedling transplanting device 6 can be made compact. Moreover, in this embodiment, in order to reduce the number of members that are close to the seedling N, the entire seedling transplanting portion is provided below the link mechanism R. With the above configuration, the connecting shaft 40 can be directly fixed to the support frame 38, and the number of parts can be reduced to reduce the play of the entire seedling planting device 6.

DESCRIPTION OF SYMBOLS 1 Seedling transplanter 4 Traveling apparatus 5 Seedling conveyance part 6 Seedling planting apparatus 31 Seedling planting clamping tool 36 Support link part 40 Connecting shaft 41 Holding tool holder 41a Connecting base part 41b Staying part 151 Position adjustment bolt 152 Connecting shaft supporter 153 Misalignment prevention guide F Joint N Seedling V Vertical joint surface

Claims (5)

A seedling transporting unit (5) for transporting seedlings (N) to a machine body provided with a traveling device (4), and a seedling planting device for planting seedlings (N) transported by the seedling transporting unit (5) in a field ( 6)
In the seedling planting device (6), a pair of seedling planting clamps (31) that sandwich the seedling (N) from the seedling transport unit (5) at its tip,
Connected to these seedling planting clamps (31) and provided with a pair of clamp tool holders (41) for operating the width of the seedling planting clamps (31),
A seedling transplanting machine, wherein the seedling transplanting clamping tool (31) and the clamping tool holder (41) are coupled to each other at a longitudinal joint surface (V) in a rear view.   A position adjusting bolt (151) for adjusting the position of the seedling planting clamp (31) along the longitudinal joint surface (V) is provided on a surface perpendicular to the longitudinal joint surface (V). The seedling transplanter according to claim 1. The longitudinal joint surface (V)
Provided inside each of the pair of holding tool holders (41),
The seedling transplanter according to claim 1 or 2, wherein a clamping pressure adjusting member (154) is provided between the clamping tool holder (41) and the seedling planting clamping tool (31). The seedling planting device (6) includes a link mechanism (R) that causes a planting operation of a seedling transplanting unit having the seedling planting clamp (31),
Constructing this link mechanism, the support link part (36) that performs the same operation as the seedling planting clamp (31),
A connecting shaft supporter (152) having a connecting shaft (40) which is an opening / closing operation fulcrum of the holding tool holder (41);
The position shift prevention guide (153) which restrains the up-and-down movement of the said clamping tool holder (41) in the position adjacent to this connection axis | shaft supporter (152) was provided. Crab seedling transplanter. The clamping tool holder (41) is connected to the seedling planting clamping tool (31) with a coupling base (41a),
It is composed of a stay part (41b) that is joined to the coupling base part (41a) and performs an opening / closing operation with the connecting shaft (40) as a fulcrum,
The seedling transplanter according to any one of claims 1 to 4, wherein the joint portion (F) between the coupling base portion (41a) and the stay portion (41b) is shifted in the vertical direction.

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