JP6094512B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a seedling transplanter such as a riding rice transplanter.

  As a seedling transplanter such as a riding rice transplanter, a seedling transplanter that takes seedlings from a seedling mat while the seedling transplanter attached to the side of the rotary case rotates with the rotation of the rotary case and is planted in the field is known. (For example, refer to Patent Document 1).

  Such a seedling transplanting machine has a configuration in which a rotary case is provided on both sides of each rear end portion of the planting transmission case branched into two, and two seedling planting tools are provided on one side of the rotary case. Plant multiple seedlings at the same time. Each seedling planting tool has a mechanism for scraping off a predetermined amount of seedlings from the seedling platform with a fixed seedling picking nail, and a mechanism for pushing out the seedling by operating an extrusion claw that pushes the seedling from the seedling picking nail almost simultaneously when entering the soil. In this way, seedlings are planted in the field.

  For each of the two rotary cases provided on both sides of each rear end of the planting transmission case, a partial strip clutch is provided to turn on and off the transmission of driving force to the rotary case and the seedling planting tool. . That is, it becomes the structure which can select the necessity of the seedling planting operation | work for every 2 stripes.

  Then, a switching cam that is rotated by a motor capable of forward / reverse rotation is brought into contact with a plurality of switching arms in stages, and a partial strip clutch that turns on and off the transmission to the seedling planting device for two strips is provided on either the left or right outer end. It is configured to turn on and off in order.

  In conjunction with the raising and lowering operation of the seedling planting part during turning, all the partial clutches are controlled at the same time, and the operation levers provided for each partial clutch are arranged on the left and right sides of the driver's seat. There is also known a seedling transplanting machine that is configured to be operated by an operator on the driver's seat by causing the grip portion of the operation lever to protrude from the upper surface of the floor step (see, for example, Patent Document 2).

JP 2009-028052 A JP2012-050342A

  However, the continuous switching mechanism that continuously switches on / off of the partial strip clutch in the conventional seedling transplanting machine described above has a large number of parts.

  More specifically, the continuous switching mechanism that continuously switches on and off of the partial strip clutch of the former seedling transplanter corresponds to the first and second, third and fourth, fifth and sixth. Since the switching arms are all composed of different parts, the number of parts is large.

  In addition, a large space is required for the arrangement of the continuous switching mechanism, and if it is disassembled during maintenance work, the time and labor required for assembly increase.

  An object of the present invention is to provide a seedling transplanter that can reduce the number of parts in a continuous switching mechanism that continuously switches on / off of a partial clutch in consideration of the above-described conventional problems. And

The first of the present invention performs the planting of seedlings, three or more planting device is arranged in the lateral direction of the vehicle body (2) (52a, 52b, 52c, 52d) and, said planting device (52a , 52b, 52c, 52d), and three or more partial clutches (71a, 52a, 52b, 52c, 52d) respectively corresponding to the planting devices (52a, 52b, 52c, 52d) for individually switching on / off of transmission of driving force to 71b, 71c, 71d) and is provided, the driving force of all of the planting device (52a, 52b, 52c, 52 d) state to pre Symbol driving force transmitted to all of the planting device (52a, 52b , 52c, 52d) until the state where the transmission of the driving force is not reached is switched from the planting device (52a) at the left end toward the planting device (52d) at the right end, or From the planting device (52d) at the right end to the planting at the left end Device (52a) to the headed before Symbol portion row clutch in so that done sequentially (71a, 71b, 71c, 71d) continuously switching mechanism for turning on and off switching of the continuously (70) is provided, the continuous switching The mechanism (70) has long ends (72a, 72b) respectively corresponding to the partial strip clutches (71a, 71b, 71c, 71d), one end of which is connected to the partial strip clutch (71a, 71b, 71c, 71d). 72c, 72d) and the partial clutches (71b, 72c, 72c, 72c) respectively corresponding to the planting device (52b, 52c) in the middle of the planting device (52a) at the left end and the planting device (52d) at the right end. 71c) Intermediate part transmission switching arms (77, 78) for individually switching on and off, and rotational power for continuously switching on and off of the partial clutches (71a, 71b, 71c, 71d) The The intermediate part transmission switching arm (77, 78) is arcuate and is provided so as to be rotatable, and the planting device (52a) at the left end is connected to the right end of the planting device (52a). The long member (72b, 72c) having one end coupled to the partial clutches (71b, 71c) respectively corresponding to the planting devices (52b, 52c) located in the middle of the planting device (52d). The other end of each is connected to the corresponding intermediate portion transmission switching arm (77, 78), and the continuous switching member (82) rotates while contacting the peripheral edge of the intermediate portion transmission switching arm (77, 78). a seedling transplantation machine you further comprising a protruding portion for rotating (86) said intermediate portion transmission switching arm (77, 78) and.

According to a second aspect of the present invention, the other end of the elongated member (72a) whose one end is connected to the partial strip clutch (71a) corresponding to the planting device (52a) at the left end is an elastic member (100a). In addition to the elongated member (72d), one end of which is connected to the projecting portion (86) via the first end and connected to the partial clutch (71d) corresponding to the planting device (52d) at the right end. end is a seedling transplantation machine as set forth in 請 Motomeko 1 you, characterized in that it is connected to the projecting portion through an elastic member (100d) (86).

According to a third aspect of the present invention, the long member (72a) having one end connected to the partial strip clutch (71a) corresponding to the planting device (52a) at the left end has a pivotable member at the other end ( The long member (72d) connected to the protrusion (86) via 101a) and one end connected to the partial clutch (71d) corresponding to the planting device (52d) at the right end. the other end is revolvable member (101d) seedling transplanter according be connected to 請 Motomeko 2 you wherein said protrusion (86) through.

According to a fourth aspect of the present invention, the continuous switching mechanism (70) includes the partial clutch (71a) corresponding to the planting device (52a) at the left end and the portion corresponding to the planting device (52d) at the right end. A single end transmission switching arm (76) for individually switching on / off of the strip clutch (71d) is rotatably provided, and a long hole (84) is formed in the end transmission switching arm (76). The projecting portion (86) rotates while contacting the inner edge of the elongated hole (84) to rotate the end transmission switching arm (76), so that the planting device (52a) at the left end is rotated. The other end of the elongated member (72a), one end of which is connected to the corresponding partial clutch (71a), is branched into two, and the projecting portion (86) is connected to one of the other branched branches. Connected to the slidably fitted slit member (200) and two The other of the branched other ends is connected to the end transmission switching arm (76), and the long member (72a) connected to the partial clutch (71a) corresponding to the planting device (52a) at the left end. And the other end of the long member (72d) whose one end is connected to the partial clutch (71d) corresponding to the planting device (52d) at the right end. The other end branched into two is connected to the slit member (200), and the other end branched into two is connected to the end transmission switching arm (76). ), And one end of the elongated member (72d) connected to the partial strip clutch (71d) corresponding to the planting device (52d) at the right end is configured to be always pulled by a contracting member. claim wherein 1 A seedling transplanting machine according.

According to a fifth aspect of the present invention, when switching of the transmission of the driving force is performed in turn from the planting device (52a) at the left end toward the planting device (52d) at the right end, the on-off switching of the partial row clutch corresponding to planting device (52 d) (71d) is performed by one of the other end branched into two is pulled by the slit member (200), the When the switching of driving force transmission is switched in turn from the planting device (52d) at the right end toward the planting device (52a) at the left end, the planting device (52a) at the left end is switched. on off switching of the corresponding part row clutch (71a) is 請 Motomeko 4 while the other end branched into two is you characterized by being performed by being pulled by the slit member (200) It is a seedling transplanting machine described in 1.

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Transmitting the first of the present invention, the driving force is all the planting device (52a, 52b, 52c, 52d ) from a state that will be transmitted to the driving force all the planting device (52a, 52b, 52c, 52d ) to up to the state that is not, as on-off switching of the transmission of the driving force, will be performed in order from the planting device of the left end for example (52a) towards the planting device rightmost (52 d) parts partial row clutch (71a, 71b, 71c, 71d) by the on-off switching of providing the continuous switching mechanism continuously performed (70), continuous switching for performing on-off switching of the partial row clutch continuously it is possible to without small number of parts in the mechanism.
Further, the continuous switching member (82) has a protrusion (86) that rotates while contacting the peripheral edge of the intermediate transmission switching arm (77, 78) to rotate the intermediate transmission switching arm (77, 78). Therefore, it is possible to realize a continuous switching mechanism with a simpler configuration.

According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, for example, the long member (72a) whose one end is connected to the partial strip clutch (71a) corresponding to the planting device (52a) at the left end. Since the other end is connected to the protruding portion (86) via the elastic member (100a), it is possible to realize a continuous switching mechanism with a more inexpensive configuration .

According to the third aspect of the present invention, in addition to the effects of the second aspect of the present invention, for example, the long member (72a) whose one end is connected to the partial strip clutch (71a) corresponding to the planting device (52a) at the left end is The other end is connected to the projecting portion (86) using the pivotable member (101a) so that no distortion or bending occurs even when pulled by the projecting portion (86) to be rotated. It is possible to more reliably switch the on / off of the strip clutch .

By the fourth invention, in addition to the effects of the first aspect of the present invention, the continuous switching mechanism (70), the left end portion row clutch corresponding to planting device (52a) (71a) and the right end of the planting device Since it has a single end transmission switching arm (76) for individually switching on and off of the partial strip clutch (71d) corresponding to (52d), it is possible to realize a continuous switching mechanism with a more inexpensive configuration It is.

According to the fifth aspect of the present invention, in addition to the effects of the fourth aspect of the present invention, switching of transmission / reception of driving force is performed, for example, from the leftmost planting device (52a) to the rightmost planting device (52d). Are switched sequentially, the partial clutch (71d) corresponding to the right end planting device (52d) is switched on and off, and one of the other ends branched in two is pulled by the slit member (200). Therefore, the partial clutch can be switched on and off more reliably .

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Left side view of a rice transplanter according to an embodiment of the present invention The top view of the rice transplanter of embodiment in this invention The block diagram of the partial strip clutch mechanism of the rice transplanter of embodiment in this invention The left view of the partial strip clutch mechanism of the rice transplanter of embodiment in this invention The top view of the partial strip clutch mechanism of the rice transplanter of embodiment in this invention Partial left side view of a partial strip clutch mechanism of a rice transplanter according to an embodiment of the present invention (No. 1) Partial left view of the partial strip clutch mechanism of the rice transplanter according to the embodiment of the present invention (No. 2) Partial left side view of the partial strip clutch mechanism of the rice transplanter according to the embodiment of the present invention (No. 3) Partial left side view of the partial strip clutch mechanism of the rice transplanter according to the embodiment of the present invention (No. 4) Partial left view of the partial strip clutch mechanism of the rice transplanter according to the embodiment of the present invention (No. 5) The left view of the partial stripe clutch mechanism of the rice transplanter of another embodiment in this invention The top view of the partial strip clutch mechanism of the rice transplanter of another embodiment in this invention Explanatory drawing of the position of a splitter and a connector of the partial strip clutch mechanism of the rice transplanter of another embodiment in this invention, and the state of a 1st clutch wire and a 4th clutch wire (A) Partial left side view of a partial strip clutch mechanism of a rice transplanter according to another embodiment of the present invention (Part 1), (b) Slider of a partial strip clutch mechanism of a rice transplanter according to another embodiment of the present invention Peripheral left side view (Part 1) (A) Partial left side view of a partial strip clutch mechanism of a rice transplanter according to another embodiment of the present invention (Part 2), (b) Slider of a partial strip clutch mechanism of a rice transplanter according to another embodiment of the present invention Peripheral left side view (Part 2) (A) Partial left side view of a partial strip clutch mechanism of a rice transplanter according to another embodiment of the present invention (Part 3), (b) Slider of a partial strip clutch mechanism of a rice transplanter according to another embodiment of the present invention Peripheral left side view (Part 3) (A) Partial left side view (part 4) of the partial strip clutch mechanism of the rice transplanter according to another embodiment of the present invention, (b) Slider of the partial strip clutch mechanism of the rice transplanter according to another embodiment of the present invention Peripheral left side view (Part 4) (A) Partial left side view of a partial strip clutch mechanism of a rice transplanter according to another embodiment of the present invention (Part 5), (b) Slider of a partial strip clutch mechanism of a rice transplanter according to another embodiment of the present invention Peripheral left side view (Part 5) (A) Explanatory drawing of the assist value of HST in which the assist value suppression process of the rice transplanter of the embodiment in the present invention is not performed, (b) The assist value suppression process of the rice transplanter of the embodiment of the present invention is performed. Explanatory diagram of assist value of HST The schematic hitch part periphery left view of the rice transplanter of embodiment in this invention Schematic lifting link device peripheral portion left side view of a rice transplanter according to an embodiment of the present invention

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In the present specification, the front / rear / left / right direction reference defines the front / rear, left / right reference based on the traveling direction of the vehicle body as viewed from the driver's seat.

  First, the configuration of the rice transplanter 8 of the present embodiment will be specifically described with reference to FIGS. 1 and 2.

  FIG. 1 is a left side view of the rice transplanter 8 according to the embodiment of the present invention, and FIG. 2 is a top view of the rice transplanter 8 according to the embodiment of the present invention.

  In FIG. 1, a state in a side view of a riding type 8-row rice transplanter 8 including a traveling vehicle body 2 is illustrated, and a state in a plan view is illustrated in FIG. 2.

  The rice transplanter 8 is an example of a seedling transplanter of the present invention. The traveling vehicle body 2 is an example of the traveling vehicle body of the present invention.

  In the rice transplanter 8, a seedling planting portion 4 is mounted on the rear side of the traveling vehicle body 2 via the lifting link mechanism 3 so as to be movable up and down, and a main body portion of the fertilizer 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 10 and a pair of left and right rear wheels 11 as drive wheels, and a mission case 12 is disposed in the front part of the fuselage. A front wheel final case 13 is provided on the side, and left and right front wheels 10 are respectively attached to left and right front wheel axles that project outward from respective front wheel support portions that can change the steering direction of the left and right front wheel final case 13.

  Further, the front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and a rear wheel gear case 18 is supported by a rear wheel rolling shaft provided horizontally in the front and rear at the center of the rear end of the main frame 15. The rear wheel 11 is attached to a rear wheel axle that is supported so as to be able to roll and projects outward from the rear wheel gear case 18.

  The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via the belt transmission device 21 and the HST 23.

  The rotational power transmitted to the mission case 12 is shifted by the transmission in the mission case 12, and then separated into traveling power and external power to be extracted. A part of the traveling power is transmitted to the front wheel final case 13 to drive the front wheel 10, and the rest is transmitted to the rear wheel gear case 18 to drive the rear wheel 11.

  Further, the external take-out power is transmitted to a planting clutch case 25 provided at the rear part of the traveling vehicle body 2, and then transmitted to the seedling planting unit 4 by the planting transmission shaft 26 and to the fertilizer application device 5 by the fertilization transmission mechanism. Be transmitted.

  The upper part of the engine 20 is covered with an engine cover 30, and a driver's seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the driver seat 31, and a steering handle 34 for steering the front wheels 10 is provided above the front cover 32.

  The engine cover 30 and the front cover 32 have horizontal floor steps 35 on the left and right sides of the lower end. The floor step 35 is partly grid-shaped (see FIG. 2), and mud on the shoe of the worker walking on the floor step 35 falls into the field.

  The elevating link device 3 has a parallel link configuration and includes one upper link 40 and a pair of left and right lower links 41. The upper link 40 and the lower link 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected at the rear end of the main frame 15, and the vertical link 43 is connected to the front end side thereof. Has been. And the connecting shaft 44 rotatably supported by the seedling planting part 4 is inserted and connected to the lower end part of the vertical link 43, and the seedling planting part 4 is connected so as to be able to roll around the connecting shaft 44.

  An elevating hydraulic cylinder 46 is provided between a support member fixed to the main frame 15 and a tip of a swing arm (not shown) integrally formed with the upper link 40, and the elevating hydraulic cylinder 46 is expanded and contracted hydraulically. As a result, the upper link 40 rotates up and down, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

  The seedling planting unit 4 has an eight-row planting structure, and includes a planting transmission case 50 that also serves as a frame, a mat seedling, and reciprocates left and right to supply seedlings one by one to the seedling outlet 51a of each row. When all the seedlings for one row are supplied to the seedling outlet 51a, the seedling stand 51 for transferring the seedlings downward by the seedling feeding belt 51b, and the seedling planting for planting the seedling supplied to the seedling outlet 51a in the field by the seedling planting tool 54 Attaching device 52 and the like are provided.

  The rear portion of the planting transmission case 50 is branched into four, and the planting drive shaft is rotatably supported at each branched rear end portion. The center part of 16 is fixedly attached by the structure which rotates integrally.

  Further, a planting rotation shaft is rotatably supported at both ends of the rotary case 16, and a seedling planting tool 54 is attached to each of these two planting rotation shafts.

  In the lower part of the seedling planting part 4, a center float 55 is provided in the center, and middle floats 57 and side floats 56 are provided on the left and right sides thereof. When the aircraft is advanced with these floats 55, 57, 56 in contact with the mud surface of the farm field, the floats 55, 57, 56 slide while leveling the mud surface, and the seedling planting device 52 is attached to the leveling trace. Seedlings are planted.

  Each of the floats 55, 57, and 56 is rotatably attached so that the front end side moves up and down corresponding to the unevenness of the soil surface of the field, and the vertical movement of the front part of the center float 55 controls the angle of attack during planting work. The planting depth of the seedling is always kept constant by switching the hydraulic valve that controls the lifting hydraulic cylinder 46 in accordance with the detection result and raising and lowering the seedling planting unit 4 according to the detection result. maintain.

  The fertilizer application device 5 feeds the granular fertilizer stored in the fertilizer tank 60 by a certain amount by the feeding unit 61, and applies the fertilizer to the left and right sides of the center float 55 and the side float 56 with the fertilizer hose 62 (see FIG. (Not shown) is guided to a fertilization structure formed in the vicinity of the side portion of the seedling planting line by a grooved body (not shown) provided on the front side of the fertilization guide. A configuration in which air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilizer hose 62 via the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hose 62 is forcibly conveyed by wind pressure. It has become.

  A first leveling rotor 27a and a second leveling rotor 27b (the combination of the first leveling rotor 27a and the second leveling rotor 27b may be simply referred to as a leveling rotor) are attached to the seedling planting portion 4.

  The seedling mount 51 is configured to slide in the left-right direction on the rail using the support roller 65a of the rectangular support frame 65 that is full in the left-right direction and the up-down direction that supports the entire seedling planting unit 4. It is.

  In addition, a pair of spare seedling frames 38 on which replenishment seedlings are placed are provided on the left and right sides of the front portion of the traveling vehicle body 2.

  Next, the configuration and operation of the partial strip clutch mechanism of the rice transplanter 8 of the present embodiment will be specifically described with reference mainly to FIG.

  FIG. 3 is a block diagram of the partial strip clutch mechanism of the rice transplanter 8 according to the embodiment of the present invention.

  In FIG. 3, the state in the top view of the parts of the planting transmission case 50 and the seedling planting device 52 is schematically illustrated, and the driving force transmission to the seedling planting device 52 is turned on and off every two lines. The connection configuration of the partial strip clutch to be controlled is shown in FIG.

  A seedling planting device 52 for planting seedlings for two strips is provided at each rear end portion branched into four rear portions of the planting transmission case 50. Here, these four seedling planting devices 52 are arranged in order from the left side of the machine body, a first seedling planting device 52a, a second seedling planting device 52b, a third seedling planting device 52c, and a fourth seedling planting device. It will be called 52d.

  The first seedling planting device 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d are examples of the planting device of the present invention. The partial clutch switching mechanism 70 is an example of a continuous switching mechanism of the present invention. Moreover, the 1st partial strip clutch 71a, the 2nd partial strip clutch 71b, the 3rd partial strip clutch 71c, and the 4th partial strip clutch 71d are examples of the partial strip clutch of this invention, respectively. Moreover, the 1st clutch wire 72a, the 2nd clutch wire 72b, the 3rd clutch wire 72c, and the 4th clutch wire 72d are examples of the elongate member of this invention, respectively.

  The first seedling planting device 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d are arranged in the left-right direction of the traveling vehicle body 2 for planting seedlings. There are three or more devices in the present embodiment.

  The first partial strip clutch 71a, the second partial strip clutch 71b, the third partial strip clutch 71c, and the fourth partial strip clutch 71d are a first seedling planting device 52a, a second seedling planting device 52b, and a third seedling planting. A first seedling planting device 52a, a second seedling planting device 52b, a third seedling planting device 52c, which individually switch on / off of transmission of driving force to the device 52c and the fourth seedling planting device 52d, and The clutches respectively correspond to the fourth seedling planting device 52d.

  The partial strip clutch switching mechanism 70 is a mechanism that continuously switches on and off of the first partial strip clutch 71a, the second partial strip clutch 71b, the third partial strip clutch 71c, and the fourth partial strip clutch 71d.

  As will be described in detail later, transmission of driving force is performed for all of the first seedling planting device 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d. From the state where the driving force is transmitted, the first seedling planting device 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d are not transmitted. Until the transmission of the driving force is switched from the first seedling planting device 52a at the left end toward the fourth seedling planting device 52d at the right end or from the fourth seedling planting device 52d at the right end. 1 seedling planting apparatus 52a is performed in order.

  Here, the configuration and operation of a partial strip clutch that controls turning on and off of transmission of the driving force to the seedling planting device 52 will be described.

  A partial strip clutch for turning on and off the driving force to the rotary case 16 and the seedling planting tool 54 provided at each rear end portion at each rear end portion branched into four rear portions of the planting transmission case 50 Is provided, and the seedling planting operation for each seedling planting device 52 for planting seedlings for two strips can be individually controlled. That is, the first seedling planting device 52a, the second seedling planting device 52b, the second partial strip clutch 71c, the second partial strip clutch 71c, the third partial strip clutch 71c, and the fourth partial strip clutch 71d, respectively. Transmission of driving force to the third seedling planting device 52c and the fourth seedling planting device 52d is turned on and off.

  The first partial strip clutch 71a, the second partial strip clutch 71b, the third partial strip clutch 71c, and the fourth partial strip clutch 71d are respectively a first clutch wire 72a, a second clutch wire 72b, a third clutch wire 72c, and a second clutch. The four-clutch wire 72d is connected to the partial clutch switching mechanism 70. When the first clutch wire 72a, the second clutch wire 72b, the third clutch wire 72c and the fourth clutch wire 72d are pulled by the partial clutch switching mechanism 70, the corresponding first partial clutch 71a and second partial strip are correspondingly pulled. The clutch 71b, the third partial strip clutch 71c, and the fourth partial strip clutch 71d are disengaged, and the corresponding first seedling planting device 52a, second seedling planting device 52b, third seedling planting device 52c, and fourth seedling The driving force is not transmitted to the planting device 52d.

  As shown in FIG. 2, the switching dial 73 for operating the partial strip clutch switching mechanism 70 is disposed beside the steering handle 34, and the operator operates the switching dial 73 while sitting on the driver's seat 31. It is possible to control switching of the partial clutch.

  Next, the configuration and operation of the partial strip clutch mechanism of the rice transplanter 8 of the present embodiment will be described more specifically with reference mainly to FIGS.

  4 is a left side view of the partial strip clutch mechanism of the rice transplanter 8 according to the embodiment of the present invention. FIG. 5 is a top view of the partial strip clutch mechanism of the rice transplanter 8 according to the embodiment of the present invention. is there.

  In addition, the 2nd switching arm 77 and the 3rd switching arm 78 are examples of the intermediate part transmission switching arm of this invention. The continuous switching gear 82 is an example of the continuous switching member of the present invention. Moreover, the arm contact pin 86 is an example of the protrusion part of this invention. The springs 100a and 100d are examples of the elastic member of the present invention. The rotary cable outers 101a and 101d are examples of the rotary member of the present invention.

  The partial clutch switching mechanism 70 includes a first clutch wire 72a, a second clutch wire 72b, a third clutch wire 72c and a fourth clutch wire 72d, a second switching arm 77 and a third switching arm 78, and a continuous switching gear 82. And having.

  One end of the first clutch wire 72a, the second clutch wire 72b, the third clutch wire 72c, and the fourth clutch wire 72d is a first partial strip clutch 71a, a second partial strip clutch 71b, a third partial strip clutch 71c, and a fourth clutch wire. These wires are respectively connected to the first partial clutch 71a, the second partial strip clutch 71b, the third partial strip clutch 71c, and the fourth partial strip clutch 71d connected to the partial strip clutch 71d.

  The second switching arm 77 and the third switching arm 78 are the second seedling planting device 52b and the third seedling planting that are intermediate between the first seedling planting device 52a at the left end and the fourth seedling planting device 52d at the right end. It is an arm for individually switching on / off of the second partial strip clutch 71b and the third partial strip clutch 71c corresponding to the device 52c.

  The continuous switching gear 82 uses a rotating power for continuously switching on / off of the first partial strip clutch 71a, the second partial strip clutch 71b, the third partial strip clutch 71c, and the fourth partial strip clutch 71d. It is a gear that can be rotated.

  The teeth formed on the arcuate edge of the continuous switching gear 82 mesh with the teeth of the switching mechanism driving gear 83 that is rotated by the switching motor 74, and the continuous switching gear 82 is rotated with the rotation of the switching mechanism driving gear 83. Thus, it rotates around the switching gear rotation fulcrum 87.

  Note that a potentiometer (not shown) for detecting the rotation angle of the continuous switching gear 82 may be provided in order to accurately control the rotation angle of the continuous switching gear 82.

  The second switching arm 77 and the third switching arm 78 are arcuate rotatable members.

  A second partial clutch 71b corresponding to a second seedling planting device 52b and a third seedling planting device 52c, respectively, located between the first seedling planting device 52a at the left end and the fourth seedling planting device 52d at the right end; The other ends of the second clutch wire 72b and the third clutch wire 72c, one end of which is connected to the third partial strip clutch 71c, are connected to the corresponding second switching arm 77 and third switching arm 78, respectively.

  The continuous switching gear 82 has an arm contact pin 86.

  The arm contact pin 86 is a pin that rotates while contacting the peripheral edges of the second switching arm 77 and the third switching arm 78 to rotate the second switching arm 77 and the third switching arm 78.

  The other end of the first clutch wire 72a whose one end is connected to the first partial clutch 71a corresponding to the first seedling planting device 52a at the left end is connected to the arm contact pin 86 via the spring 100a.

  The other end of the fourth clutch wire 72d, one end of which is connected to the fourth partial clutch 71d corresponding to the fourth seedling planting device 52d at the right end, is connected to the arm contact pin 86 via the spring 100d.

  The first clutch wire 72a having one end coupled to the first partial clutch 71a corresponding to the first seedling planting device 52a on the left end is not distorted or bent even when pulled by the arm contact pin 86 that is rotated. As described above, the other end is connected to the arm contact pin 86 by using the rotary cable outer 101a.

  The fourth clutch wire 72d having one end connected to the fourth partial clutch 71d corresponding to the fourth seedling planting device 52d at the right end is not distorted or bent even when pulled by the arm contact pin 86 that is rotated. As described above, the other end is connected to the arm contact pin 86 using the rotary cable outer 101d.

  Next, with reference mainly to FIGS. 4 to 10, the operation over time accompanying the rotation of the continuous switching gear 82 included in the partial strip clutch mechanism of the rice transplanter 8 of the present embodiment will be described in detail.

  Here, FIGS. 6 to 10 are partial left side views (parts 1 to 5) of the partial strip clutch mechanism of the rice transplanter 8 according to the embodiment of the present invention.

  Transmission of driving force from the state where transmission of driving force is performed for all of the first seedling planting device 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d. Until all of the first seedling planting device 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d are in a state of being not transmitted. A specific description will be given of a case where switching is performed in turn from the first seedling planting device 52a at the left end toward the fourth seedling planting device 52d at the right end.

  The driving force is transmitted from the state in which the driving force is transmitted for all of the first seedling planting device 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d. Is transmitted until all the first seedling planting device 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d are transmitted. Even when the on / off switching is sequentially performed from the fourth seedling planting device 52d at the right end toward the first seedling planting device 52a at the left end, detailed description is omitted, but the same applies. .

  Since the configuration is symmetrical, the roles of the first seedling planting device 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d in the former case are as follows: This is because it corresponds to the roles of the fourth seedling planting device 52d, the third seedling planting device 52c, the second seedling planting device 52b, and the first seedling planting device 52a in the latter case.

  Now, the switching gear rotation fulcrum 87 in the case where switching of the transmission of the driving force is sequentially performed from the first seedling planting device 52a at the left end toward the fourth seedling planting device 52d at the right end. The rotation angle of the continuous switching gear 82 that rotates counterclockwise around the center is 0 degree, 30 degrees, 60 degrees, 90 degrees, and 120 degrees with respect to the vertical downward line.

  The rotation state (0) to the rotation state (4) are states corresponding to such a rotation angle of 0 to 120 degrees, and are shown in FIGS.

  In the rotation state (0), the springs 100a and 100d are slightly extended, but the first clutch wire 72a and the fourth clutch wire 72d are only slightly pulled, and the arm contact pin 86 is in the second state. Neither the switching arm 77 nor the third switching arm 78 is in contact.

  In the rotating state (1), the spring 100a is greatly extended by the urging force applied to the spring 100a, and the first clutch wire 72a is also greatly pulled along with this, but the fourth clutch wire 72d is slightly The arm contact pin 86 is about to start the rotation of the second switching arm 77 counterclockwise around the second rotation fulcrum 80, but the third switching arm 78 includes Not yet in contact.

  Even in the rotation state (2), the fourth clutch wire 72d is slightly pulled, and the arm contact pin 86 has almost finished the rotation of the second switching arm 77, but the third rotation The rotation of the third switching arm 78 counterclockwise around the fulcrum 81 is about to start.

  In the rotating state (3), the fourth clutch wire 72d is still pulled slightly, and the arm contact pin 86 has almost finished rotating the third switching arm 78.

  In the rotating state (4), since the biasing force is also applied to the spring 100d, the spring 100d is also greatly expanded, and the fourth clutch wire 72d is also greatly pulled along with the extension of the spring 100d.

  Therefore, the on / off switching of the first partial clutch 71a is performed between the rotation state (0) and the rotation state (1), and the on / off switching of the second partial clutch 71b is in the rotation state ( 1) and the rotation state (2), and the on / off switching of the third partial clutch 71c is performed between the rotation state (2) and the rotation state (3). The on / off switching of the partial strip clutch 71d is performed between the rotating state (3) and the rotating state (4).

  Note that, between the rotating state (3) and the rotating state (4), one end of the third clutch wire 72c is pulled using the clutch spring 102c disposed on the clutch side, but the arm contact pin 86 wraps around the upper side of the third switching arm 78 and presses the third switching arm 78. As a result, the third switching arm 78 that is constrained is not rotated, so the third partial clutch 71c. There is no concern that the on / off switching will be performed.

  Also, transmission of driving force, which is an operation in the opposite direction, is performed for all of the first seedling planting device 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d. The state where the transmission of the driving force is performed for all the first seedling planting devices 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d from the state that is not broken. Detailed description will be given also for the case where the switching of the transmission of the driving force is performed in turn from the fourth seedling planting device 52d at the right end toward the first seedling planting device 52a at the left end. Is omitted, but the same applies.

  This includes a first clutch wire 72a, a second clutch wire 72b, and a third clutch connected to the first partial clutch 71a, the second partial clutch 71b, the third partial clutch 71c, and the fourth partial clutch 71d. This is because one end of each of the wire 72c and the fourth clutch wire 72d is always pulled using the clutch springs 102a, 102b, 102c and 102d arranged on the clutch side.

  Thus, the continuous switching gear 82 provided with the roller-shaped arm contact pin 86 and driven by the switching motor 74 capable of forward and reverse rotation as the switching actuator, and the second switching arm rotated by the arm contact pin 86. 77 and the third switching arm 78, and the first clutch wire 72a and the fourth partial clutch 71d connected to the arm contact pin 86 via the springs 100a and 100d, respectively, and the fully engaged state. Switching between the full cut-off state can be easily performed.

  As described above, in the case of realizing the full cut state, the partial strip clutch connected to the clutch wire pulled by the last overstroke does not enter the cut state due to the extra strokes until then.

  This is because the clutch wire is connected to the arm contact pin via a spring, and even if a certain amount of tension is applied to the clutch wire, the elasticity of the spring advantageously absorbs the tension.

  Of course, for example, the arm contact pin 86 in the rotation state (4) in which the rotation angle of the continuous switching gear 82 is 120 degrees when the rotation described above is counterclockwise, The distance (168.97 mm) between the fourth partial clutch 71d and the rotary cable outer 101d that is in the state is -30 degrees when the rotation angle of the continuous switching gear 82 is clockwise when the rotation is clockwise. Is substantially the same as the distance (171.2 mm) between the arm contact pin 86 in the rotating state and the rotating cable outer 101d of the fourth partial strip clutch 71d that is initially in the disconnected state. , Or almost no difference.

  The first clutch wire 72a and the fourth partial clutch 71d described above are rotated by the arm contact pin 86, not by the partial clutch mechanism in which the first clutch wire 72a and the fourth partial clutch 71d are coupled to the arm contact pin 86 through the springs 100a and 100d, respectively. Similarly, switching between the full-running state and the full-cutting state can be easily performed by using another partial clutch mechanism that uses the end transmission switching arm that is made to move.

  Therefore, with reference mainly to FIGS. 11 and 12, the configuration and operation of the partial strip clutch mechanism of the rice transplanter 8 of another embodiment will be mainly described with respect to the differences from the above-described embodiment.

  FIG. 11 is a left side view of the partial strip clutch mechanism of the rice transplanter 8 according to another embodiment of the present invention. FIG. 12 is a partial strip clutch mechanism of the rice transplanter 8 according to another embodiment of the present invention. FIG.

  In addition, the 1st switching arm 76 is an example of the edge part transmission switching arm of this invention. The contact pin sliding hole 84 is an example of a long hole of the present invention. The slider 200 is an example of a slit member of the present invention. The clutch springs 102a and 102d are examples of the contracting member of the present invention.

  The partial clutch switching mechanism 70 has a first switching arm 76.

  The first switching arm 76 switches on / off of the first partial strip clutch 71a corresponding to the first seedling planting device 52a at the left end and the fourth partial strip clutch 71d corresponding to the fourth seedling planting device 52d at the right end. It is a single arm that performs individually.

  The first switching arm 76 is a rotatable member having a contact pin sliding hole 84.

  The arm contact pin 86 rotates while contacting the inner edge of the contact pin sliding hole 84 to rotate the first switching arm 76.

  The other end of the first clutch wire 72a having one end connected to the first partial clutch 71a corresponding to the first seedling planting device 52a at the left end is branched into two, and one of the other ends branched into two Is connected to a slider 200 in which an arm contact pin 86 is slidably fitted, and the other of the other ends branched in two is connected to a first switching arm 76.

  The other end of the fourth clutch wire 72d whose one end is connected to the fourth partial clutch 71d corresponding to the fourth seedling planting device 52d on the right end is branched into two, and one of the other ends branched into two Is connected to the slider 200, and the other of the other ends branched in two is connected to the first switching arm 76.

  Branches at the other ends of the first clutch wire 72a and the fourth clutch wire 72d are performed using splitters 201a and 201d, respectively, and branched into two, the first clutch wire 72a and the fourth clutch wire 72d. The other end of the slider 200 is connected to the slider 200 using the connector 203 and the connector wire 204 together with the cable outer 202 provided on the first switching arm 76.

  Of course, the use of these components is not essential in the sense that it is sufficient if such branching and linking is realized.

  One end of the first clutch wire 72a connected to the first partial strip clutch 71a corresponding to the first seedling planting device 52a at the left end is always pulled by the clutch spring 102a.

  One end of the fourth clutch wire 72d connected to the fourth partial strip clutch 71d corresponding to the fourth seedling planting device 52d at the right end is always pulled by the clutch spring 102d.

  When the switching of driving force transmission / removal is sequentially performed from the first seedling planting device 52a at the left end toward the fourth seedling planting device 52d at the right end, the fourth seedling planting device 52d at the right end. The on / off switching of the fourth partial clutch 71d corresponding to is performed by pulling one of the other ends branched into two by the slider 200.

  When the switching of driving force transmission / removal is sequentially performed from the fourth seedling planting device 52d at the right end toward the first seedling planting device 52a at the left end, the first seedling planting device 52a at the left end. The on / off switching of the first partial strip clutch 71 a corresponding to is performed by pulling one of the other ends branched into two by the slider 200.

  Next, with reference mainly to FIGS. 11 to 18, the operation over time associated with the rotation of the continuous switching gear 82 included in the partial strip clutch mechanism of the rice transplanter 8 according to another embodiment will be described in detail. .

  Here, FIG. 13 shows the positions of the splitters 201a and 201d and the connector 203 and the states of the first clutch wire 72a and the fourth clutch wire 72d of the partial strip clutch mechanism of the rice transplanter 8 according to another embodiment of the present invention. 14 (a) to 18 (a) are partial left side views (parts 1 to 5) of the partial strip clutch mechanism of the rice transplanter 8 according to another embodiment of the present invention. 14 (b) to 18 (b) are left and right side views (parts 1 to 5) of the periphery of the slider 200 of the partial strip clutch mechanism of the rice transplanter 8 according to another embodiment of the present invention.

  Transmission of driving force from the state where transmission of driving force is performed for all of the first seedling planting device 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d. Until all of the first seedling planting device 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d are in a state of being not transmitted. A specific description will be given of a case where switching is performed in turn from the first seedling planting device 52a at the left end toward the fourth seedling planting device 52d at the right end.

  Now, the switching gear rotation fulcrum 87 in the case where switching of the transmission of the driving force is sequentially performed from the first seedling planting device 52a at the left end toward the fourth seedling planting device 52d at the right end. The rotation angle of the continuous switching gear 82 that rotates counterclockwise around the center is 0 degree, 30 degrees, 60 degrees, 90 degrees, and 120 degrees with respect to the vertical downward line.

  The rotation state (0) to the rotation state (4) are states corresponding to such a rotation angle of 0 degrees to 120 degrees, respectively, and are shown in FIGS.

  In the rotation state (0), the arm contact pin 86 is about to start the rotation of the first switching arm 76 counterclockwise about the first rotation fulcrum 79. Is not in contact with the third switching arm 78.

  The positions of the connector 203 and the splitters 201a and 201d are all clutch side positions.

  Therefore, the slider 200 is pulled by the clutch spring 102a and the clutch spring 102d through the connector wire 204. However, the connector wire 204 has rigidity and does not easily loosen, so the slider 200 is greatly pulled toward the clutch. There is no concern that the arm contact pin 86 is on the slider, and the position of the lower end of the slider 200 is the position on the slider.

  Of course, when there is a concern that the slider 200 may be largely pulled toward the clutch, for example, a stopper for restricting the connector 203 from moving toward the clutch may be provided.

  In the rotation state (1), the arm contact pin 86 has almost finished the rotation of the first switching arm 76, and the second switching arm 77 counterclockwise around the second rotation fulcrum 80 is used. Although the rotation is about to start, the third switching arm 78 is not yet in contact.

  Accordingly, the position of the splitter 201a greatly pulled by the first switching arm 76 is changed to the switching gear side position, but the positions of the connector 203 and the splitter 201d are still the clutch side position.

  Since the slider 200 is pulled by at least the urging force applied by the clutch spring 102d, the distance between the slider 200 and the cable outer 202 has not changed much, and the position of the arm contact pin 86 on the slider has not changed. It changes upward and is located between the lower end and the center of the slider 200.

  In the rotation state (2), the arm contact pin 86 has almost finished the rotation of the second switching arm 77, and the third switching arm 78 counterclockwise around the third rotation fulcrum 81 is used. Trying to start turning.

  Of course, the position of the splitter 201a does not change further and is the switching gear side position, and the positions of the connector 203 and the splitter 201d do not change and are still the clutch side position.

  Since the slider 200 is pulled at least by the urging force applied by the clutch spring 102d, the distance between the slider 200 and the cable outer 202 is hardly changed, and the position of the arm contact pin 86 on the slider is not changed. Further, the position changes upward and is located between the center portion and the upper end portion of the slider 200.

  In the rotation state (3), the arm contact pin 86 has almost completed the rotation of the third switching arm 78.

  Of course, the position of the splitter 201a does not change and is the switching gear side position, and the positions of the connector 203 and the splitter 201d do not change and are still the clutch side position.

  Since the slider 200 is pulled at least by the clutch spring 102d, the distance between the slider 200 and the cable outer 202 is still almost unchanged, but the position of the arm contact pin 86 on the slider is further upward. The position changes to the position of the upper end of the slider 200, and the posture cannot change upward as before.

  In the rotation state (4), the position of the arm contact pin 86 on the slider cannot be changed upward as described above. Therefore, the slider 200 is greatly pulled by the arm contact pin 86, and the slider 200 The distance between the cable outer 202 and the cable outer 202 is greatly increased. As a result, the positions of the connector 203 and the splitter 201d greatly pulled by the connector wire 204 are also changed to the switching gear side position.

  Therefore, the on / off switching of the first partial clutch 71a is performed between the rotation state (0) and the rotation state (1), and the on / off switching of the second partial clutch 71b is in the rotation state ( 1) and the rotation state (2), and the on / off switching of the third partial clutch 71c is performed between the rotation state (2) and the rotation state (3). The on / off switching of the partial strip clutch 71d is performed between the rotating state (3) and the rotating state (4).

  In addition, transmission of driving force, which is an operation in the opposite direction, is performed for all of the first seedling planting device 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d. The state where the transmission of the driving force is performed for all the first seedling planting devices 52a, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d from the state that is not broken. Detailed description will be given also for the case where the switching of the transmission of the driving force is performed in turn from the fourth seedling planting device 52d at the right end toward the first seedling planting device 52a at the left end. Is omitted, but the same applies.

  This includes a first clutch wire 72a, a second clutch wire 72b, and a third clutch connected to the first partial clutch 71a, the second partial clutch 71b, the third partial clutch 71c, and the fourth partial clutch 71d. This is because one end of each of the wire 72c and the fourth clutch wire 72d is always pulled using the clutch springs 102a, 102b, 102c and 102d arranged on the clutch side.

  It should be noted that the positions of the connector 203 and the splitter 201d change to the clutch side position between the rotating state (4) and the rotating state (3) in such a reverse operation, but the first switching arm As a result, the position of the constrained splitter 201a cannot be changed and is the switching gear side position, so the first partial clutch 71a is switched on and off. There is no concern.

  As described above in detail for the embodiment and other embodiments of the present invention, the partial clutch is turned "ON" or "OFF" in order from the left or right outer end by the continuous switching gear 82. Thus, the on / off operation of the first partial strip clutch 71a, the second partial strip clutch 71b, the third partial strip clutch 71c, and the fourth partial strip clutch 71d is simplified, and the work efficiency and operability are improved.

  In other words, the first partial stripe clutch 71a, the second partial stripe clutch 71b, the third partial stripe clutch 71c, and the fourth partial stripe clutch 71d are in the “off” or “on” state in order from the left or right outer end. Thus, it is possible to prevent some partial strip clutches from being forgotten to be cut off, so that it is possible to prevent seedlings from being planted in unnecessary portions and to reduce the consumption of seedlings.

  Then, as in the prior art, an operation lever for turning on and off the first partial clutch 71a, the second partial clutch 71b, the third partial strip clutch 71c, and the fourth partial strip clutch 71d is projected on the upper surface of the traveling vehicle body 2. Since there is no need, the operator's feet or the like may come into contact with each other, and the first partial clutch 71a, the second partial clutch 71b, the third partial clutch 71c, and the fourth partial clutch 71d may be in a “disconnected” state. This prevents the worker from planting the seedling in the section where the seedling has not been planted, reducing the labor of the worker, and conversely, the first partial clutch 71a, the second partial clutch 71b, and the third part. It is prevented that the strip clutch 71c and the fourth partial strip clutch 71d are in the “on” state, so that seedlings are not planted in places where planting is unnecessary, and the consumption of seedlings is suppressed.

  Furthermore, since the seedling planting device 52 is reliably operated and stopped, seedlings are reliably planted in necessary places, so that an operator does not need to plant seedlings and extra seedlings are planted. This will reduce the consumption of seedlings.

  In addition, the switching motor 74 can be automatically stopped according to the number of lines for performing the on / off operation of the first partial line clutch 71a, the second partial line clutch 71b, the third partial line clutch 71c, and the fourth partial line clutch 71d. Therefore, it is not necessary for the operator to perform fine operations on the switching motor 74, and the operability is improved.

  In addition, it is prevented that some partial strip clutches are forgotten to be “on” or “off”, so that seedlings are reliably planted in necessary places, so that an operator does not need to plant seedlings and extra seedlings. Planting is not carried out and the consumption of seedlings is reduced.

  Moreover, since it is possible to prevent the seedling planting device 52 from being stopped by “disconnecting” all the partial strip clutches, it is possible to prevent the seedling from being planted by mistaken operation, and the seedling can be surely placed at a necessary place. Planting the seedling by an operator is unnecessary.

  (A) Next, various configurations and operations of the rice transplanter 8 related to the planting pots of the seedling planting device 52 will be described with reference mainly to FIG.

  An eccentric gear having an appropriate eccentricity corresponding to the number of strains is incorporated so that sparse planting with a predetermined number of strains such as 37 strains or 42 strains can be executed reliably.

  However, when the vehicle body traveling speed is relatively high, the seedling planting tool 54 may move up and down at an excessive pitch, and pulsation is likely to occur, and sparse planting may not be performed well.

  Accordingly, as shown in FIG. 19, for example, when execution of sparse planting is instructed by a stock setting lever or the like, the seventh or eighth vehicle body of the first to eighth vehicle body traveling speeds Even when a large vehicle body traveling speed such as a traveling speed is instructed by the operator's operation, the assist value of the HST 23 is not set to the original large value corresponding to the normal seventh or eighth vehicle body traveling speed. Assist value suppression processing may be performed to make the value smaller than the six vehicle body traveling speed.

  Here, FIG. 19A is an explanatory diagram of the assist value of the HST 23 in which the assist value suppression processing of the rice transplanter 8 according to the embodiment of the present invention is not performed, and FIG. 19B is the embodiment of the present invention. It is explanatory drawing of the assist value of HST23 in which the assist value suppression process of the rice transplanter 8 of a form is performed.

  Such adjustment of assist value suppression can be performed using, for example, a setting in consideration of the eccentricity of the eccentric gear described above for each target vehicle body traveling speed.

  And it is desirable that the float sensitivity suppression process of the center float 55 in which the vertical movement of the front part is detected by the angle-of-attack control sensor is performed together with the assist value suppression process as described above.

  This is because even if the assist value suppression process is performed with difficulty, if the float sensitivity suppression process is not performed normally and the seedling planting depth is too shallow, the planted seedling will fall in the direction of vehicle travel, This is because so-called planted seedlings tend to be tilted, and eventually sparse planting may not be performed well.

  Therefore, in the case where execution of sparse planting is instructed by a stock setting lever or the like, a large vehicle body traveling speed such as the seventh or eighth vehicle body traveling speed among the first to eighth vehicle body traveling speeds is determined by the operator's operation. Even when instructed, the float sensitivity of the center float 55 is not set to the original large value corresponding to the normal seventh or eighth vehicle body traveling speed, but is smaller than that corresponding to the sixth vehicle body traveling speed, for example. Float sensitivity suppression processing may be performed.

  Such adjustment of float sensitivity suppression is, for example, for each target vehicle body traveling speed, (1) increasing the float oil pressure dead zone, which is the float oil pressure non-detection period, or (2) increasing the float oil pressure output delay time. It can be performed using the settings such as.

  Thus, even when sparse planting is being performed, the seedling planting part 4 can be appropriately raised and lowered by switching the hydraulic valve that controls the lifting hydraulic cylinder 46, so that the seedling planting depth is always constant. An automatic planting depth adjustment function for maintaining a sufficient size is effectively exhibited.

  In addition, as shown in FIG. 20, for example, in order to suppress the forward tilting of the planted seedling, the above-described float sensitivity suppression process is not performed, but the angle of the seedling platform 51, or It is mounted via the elevating link mechanism 3 so that the angle of the portion including the seedling platform 51, the seedling platform frame 301, the seedling planting tool 54, and the like is changed to offset the forward tilt of the planting seedling. You may equip the rear side of the raising / lowering link mechanism 3 with the power cylinder 302 for backward tilting of the hitch part which tilts the hitch part 300 in the direction opposite to the vehicle body running direction (indicated by the arrow X).

  FIG. 20 is a schematic left side view of the peripheral portion of the hitch unit 300 of the rice transplanter 8 according to the embodiment of the present invention.

  (B) Next, various configurations and operations of the rice transplanter 8 related to the idling stop of the engine 20 will be described with reference mainly to FIG.

  The idling stop is an operation for suppressing the rotational speed of the engine 20 to 1000 rpm or less when the vehicle body traveling stop is continued for a certain period of time or when the idling stop instruction button is pressed down.

  When such an idling stop is executed, it is desirable to raise the seedling planting part 4 mounted on the rear side of the traveling vehicle body 2 via the lifting link mechanism 3 so as to be liftable.

  This is because if the seedling planting part 4 is raised at least so as not to be immersed in mud, so-called blowback occurs due to an increase in the internal pressure of the fertilizer application device 5 or mud clogging at the outlet of the fertilizer hose 62 occurs. This is because trouble that occurs or the like is less likely to be caused, so that the possibility that fertilization accuracy is reduced is reduced.

  The height position for raising the seedling planting part 4 may be the maximum lift position.

  Then, when the idling stop is released, the dropping energy caused by the lowering of the lifting / lowering link device 3 due to the lowering of the hydraulic pressure of the lifting / lowering hydraulic cylinder 46 is accumulated as (1) regenerative energy by battery charging or the like (2) the engine 20 When the engine is stopped at the time of idling stop, it can be efficiently realized to use it as auxiliary power of the cell motor for restarting the engine 20.

  In the latter case, as shown in FIG. 21, for example, the recoil gear 401 is meshed with the drive gear 400 that rotates as the elevating link device 3 descends so that it can be used as auxiliary power for the cell motor. By using a configuration in which the rotated recoil 402 is wound when the elevating link device 3 is lowered, it is possible to suppress battery consumption.

  FIG. 21 is a schematic left side view of the periphery of the lifting / lowering link device 3 of the rice transplanter 8 according to the embodiment of the present invention.

  Of course, when the idling stop is executed, the hydraulic system valve block of the elevating hydraulic cylinder 46 is also executed so that the raised seedling planting portion 4 does not fall freely, and the idling stop is released. In such a case, such a hydraulic system valve block may be released together.

  Note that when restarting the engine 20 as described above, in order to avoid unstable HST operation during the period until the rotational speed of the engine 20 rises to 1800 rpm or more using the hydraulic circuit setting of the HST 23 or the like. The driving of the HST 23 may be stopped.

  In such a case, all the electrical components that are in the operating state when the idling stop is executed may be temporarily inactivated in order to ensure sufficient power for restarting the engine 20.

  The seedling transplanter in the present invention can reduce the number of parts in a continuous switching mechanism that continuously switches on and off of the partial strip clutch, and is used for a seedling transplanter such as a riding rice transplanter Useful for.

2 traveling vehicle body 8 rice transplanter 52a first seedling planting device 52b second seedling planting device 52c third seedling planting device 52d fourth seedling planting device 70 partial strip clutch switching mechanism 71a first partial strip clutch 71b second portion First clutch 71c Third partial clutch 71d Fourth partial clutch 72a First clutch wire 72b Second clutch wire 72c Third clutch wire 72d Fourth clutch wire 76 First switching arm 77 Second switching arm 78 Third switching arm 82 Continuous switching gear 84 Contact pin sliding hole 86 Arm Contact pin 100a, 100d Spring 101a, 101d Rotary cable outer 102a, 102b, 102c, 102d Clutch spring 200 Slider 201a, 201d Splitter 202 Cable outer 203 Connector 04 connector wire 300 hitch portion 301 seedling table frame 302 after the hitch unit 傾用 power cylinder 400 driving gear 401 Rikoirugiya 402 recoil

Claims (5)

Performing planting seedlings, three or more planting device is arranged in the lateral direction of the vehicle body (2) (52a, 52b, 52c, 52d) and, said planting device (52a, 52b, 52c, 52d ) Three or more partial strip clutches (71a, 71b, 71c, 71d) respectively corresponding to the planting devices (52a, 52b, 52c, 52d) that individually switch on / off of transmission of the driving force to Provided ,
The driving force for all of the planting device is not transmitting (52a, 52b, 52c, 52d ) state to pre Symbol driving force transmitted to all of the planting device (52a, 52b, 52c, 52d ) to Until reaching the state, the switching of driving force transmission is switched from the planting device (52a) at the left end toward the planting device (52d) at the right end or the planting device (52d) at the right end. the planting device left from strip before Symbol portion so that performed in order toward the (52a) clutches (71a, 71b, 71c, 71d ) of the continuous switching mechanism continuously switches the on-off (70) Provided,
The continuous switching mechanism (70) has long members (71a, 71b, 71c, 71d) each corresponding to the partial strip clutch (71a, 71b, 71c, 71d), one end of which is connected to the partial strip clutch (71a, 71b, 71c, 71d). 72a, 72b, 72c, 72d) and the partial strip clutch respectively corresponding to the planting device (52b, 52c) in the middle of the planting device (52a) at the left end and the planting device (52d) at the right end In order to continuously switch on / off of the intermediate transmission switching arms (77, 78) for individually switching on / off of (71b, 71c) and the partial clutches (71a, 71b, 71c, 71d). A continuous switching member (82) that can be rotated using the rotational force of
The intermediate transmission switching arms (77, 78) are arcuate and are provided so as to be rotatable, and the planting device (52d) located at the middle of the planting device (52a) at the left end and the planting device (52d) at the right end. 52b, 52c) corresponding to the partial clutches (71b, 71c) respectively, the other ends of the long members (72b, 72c) connected to the corresponding intermediate portion transmission switching arms (77, 78). )
The continuous switching member (82) rotates while contacting the peripheral edge of the intermediate portion transmission switching arm (77, 78) to rotate the intermediate portion transmission switching arm (77, 78). seedling transplanting machine characterized in that it has a. The other end of the elongated member (72a), one end of which is connected to the partial clutch (71a) corresponding to the planting device (52a) at the left end is connected to the protruding portion ( 86) and
The other end of the elongate member (72d), one end of which is connected to the partial clutch (71d) corresponding to the planting device (52d) at the right end is connected to the projecting portion (100d) via an elastic member (100d). seedling transplantation machine as set forth in 請 Motomeko 1 you, characterized in that it is connected to the 86). The long member (72a) having one end connected to the partial clutch (71a) corresponding to the planting device (52a) at the left end has the other end protruding through the rotary member (101a). Connected to the portion (86),
The long member (72d), one end of which is connected to the partial clutch (71d) corresponding to the planting device (52d) at the right end, the other end projects through the rotary member (101d). seedling transplantation machine as set forth in 請 Motomeko 2 you, characterized in that it is connected to the section (86). The continuous switching mechanism (70) is configured to engage the partial strip clutch (71a) corresponding to the planting device (52a) at the left end and the partial strip clutch (71d) corresponding to the planting device (52d) at the right end. A single end transmission switching arm (76) for individually switching the cutting is rotatably provided, a long hole (84) is formed in the end transmission switching arm (76), and the protrusion (86) Rotates while contacting the inner edge of the elongated hole (84) to rotate the end transmission switching arm (76),
The other end of the elongate member (72a) connected at one end to the partial clutch (71a) corresponding to the planting device (52a) at the left end is bifurcated into two parts. One of the ends is connected to the slit member (200) in which the protruding portion (86) is slidably fitted, and the other of the other ends branched into two is connected to the end transmission switching arm (76),
While having a configuration in which one end of the long member (72a) connected to the partial clutch (71a) corresponding to the planting device (52a) at the left end is always pulled by a contracting member,
The other end of the elongate member (72d) having one end connected to the partial clutch (71d) corresponding to the planting device (52d) at the right end is bifurcated and bifurcated. One of the other ends is connected to the slit member (200), and the other of the other ends branched in two is connected to the end transmission switching arm (76),
One end of the elongate member (72d) connected to the partial strip clutch (71d) corresponding to the planting device (52d) at the right end is configured to be always pulled by a contraction member. seedling transplanting machine according to 1. When switching of the transmission of the driving force is performed sequentially from the leftmost planting device (52a) to the rightmost planting device (52d), the rightmost planting device (52d). Switching of on / off of the partial strip clutch (71d) corresponding to is performed by pulling one of the other ends branched in two by the slit member (200) ,
When the switching of the driving force transmission is switched in turn from the rightmost planting device (52d) to the leftmost planting device (52a), the leftmost planting device (52a). 請 on off switching of the partial row clutch corresponding (71a) is, you characterized by being performed by being towed while the other end branched into two is by the slit member (200) to Motomeko 4. The seedling transplanter according to 4 .

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