JP2015027269A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling transplanter which solves a problem that a conventional seedling transplanter has the same number of switches as the number of partial row clutches at a front part of a driver seat, but a cost is increased due to the installation of a wasteful switch although it is not necessary to install each switch for each partial row clutch, and furthermore, an erroneous operation is caused by a worker who turns off all the switches.SOLUTION: In a seedling transplanter, a switch operation member (73) is constituted by horizontally aligning switches (94a ...) smaller in number than partial row clutches (71a ...), the partial row clutch located at a left end is turned off when firstly operating the left-side switch, and when operating the right-side switch firstly, the partial row clutch located at a right end is turned off.

Description

The present invention relates to a seedling transplanter such as a rice transplanter for transplanting rice seedlings or the like in a field.

  The seedling transplanting machine described in Patent Document 1 is provided with the same number of switches (clutch switches) on the dashboard in front of the driver's seat as the number of partial strip clutches (seedling claw unit clutches). In addition, there are as many switching arms as the number of partial clutches in the partial clutch switching mechanism (unit case), and a switching cam rotated by a motor capable of forward and reverse rotation is brought into contact with these switching arms step by step. The partial strip clutch for turning on and off the transmission to the seedling planting device for two pieces is turned on and off in order from either the left or right outer end.

JP 2009-28052 A JP 2012-135245 A

  However, when the worker uses the partial strip clutch for planting the end of the field, etc., the partial strip clutch is not turned off. Therefore, it is not necessary to provide a switch for each partial clutch, and there is a problem that the cost increases in this respect. In addition, since all of the partial strip clutches of Patent Document 1 can be “turned off”, there is a problem that an operator performs an erroneous operation of “turning off” all of them.

  In addition, the partial clutch switching mechanism has separate switching arms corresponding to the 1st and 2nd articles, the 3rd and 4th articles, the 5th and 6th articles, and has a large number of parts. Then, there is a problem that the time and labor required for assembly increase. This problem is particularly serious when there are many stripes.

  In addition, in order to ensure the rotation range of each switching arm in the partial clutch switching mechanism, each switching arm is provided at a different phase in the vertical direction, so the thickness in the vertical direction is created, and the partial clutch switching There is a problem that the space for disposing the mechanism becomes excessively large.

  The seedling transplanter of Patent Document 2 is configured to include a radiator at the rear of the engine to cool the engine.

  However, since the heat of the engine provided at the lower part of the floor step is also dissipated to the front side of the aircraft and the side of the aircraft, the heat accumulates around the engine, and overheating tends to occur if the work continues for a long time. There is.

  Also, the hydraulic continuously variable transmission (HST) provided on the front side of the engine may become hot due to operation, and if the internal hydraulic fluid is overheated, the flow of hydraulic fluid will be disturbed, and the HST will operate according to the operator's operation. There is a problem that does not work.

  Therefore, it is a problem to be solved by the present invention to provide a seedling transplanter that solves the above problems.

The present invention has taken the following technical means to solve the above problems.
That is, the invention described in claim 1 is a seedling placement part (51) for loading a plurality of seedlings on the rear side of the traveling vehicle body (2), and taking seedlings from the seedling placement part (51) in the field. A plurality of seedling planting devices (52a, 52b,...) To be planted and partial strip clutches (71a, 71) for turning on and off the transmission of driving force to any of these seedling planting devices (52a, 52b,...) 71b,..., And a number of switching operation members (73) that operate these partial strip clutches (71a, 71b,...) Less than the partial strip clutches (71a, 71b,...). Are arranged side by side, and when the leftmost one of these switches (94a, 94b,...) Is operated first, the leftmost of the partial strip clutches (71a, 71b,...) Cut the one located at the front and Switch (94a, 94b, ...) first to Operating the right end of those portions row clutch of the (71a, 71b, ...) is a seedling transplantation machine, characterized in that cut one located at the right end of the.

  Further, the invention according to claim 2 is that the switch (94a, 94b,...) Of the left end or the right end is first operated, and then the end opposite to the operated side is selected. 2. The seedling transplanter according to claim 1, wherein when the second operation is performed, the partial strip clutches (71 a, 71 b,...) Are configured to cut other than the second operated side end. .

  Further, the invention according to claim 3 is characterized in that the transmission switching arm (76, 77a, 77b,...) For turning on and off the partial clutch (71a, 71b,...) Is connected to the partial clutch (71a, 71b,. ...) one main transmission switching arm (76) for turning on and off one located at the left and right outer ends, and one not located at the left and right outer ends among the partial clutches (71a, 71b, ...) One or more sub-transmission switching arms (77a, 77b,...) For turning on and off, and these transmission switching arms (76, 77a, 77b. The switch clutch (71a, 71b,...) Is turned on and off, and the switching operation member (73) is configured by horizontally arranging two or more switches (94a, 94b,...). , 94b, ... When the left end of the first is operated, the main transmission switching arm (76) operates in a direction to cut the left end of the partial clutches (71a, 71b,...), And the switches (94a, 94b, ..), The main transmission switching arm (76) operates in a direction to cut the one located at the right end of the partial strip clutches (71a, 71b,...). The seedling transplanter according to claim 1 or claim 2.

  According to a fourth aspect of the present invention, the transmission switching arm (76, 77a, 77b,...) Rotatably disposed on the support frame (75) and the transmission switching arms (76, 77a,. 77b,...) Are provided with a continuous switching member (82) having a contact pin (86) for rotating, and a switching actuator (74) for driving the continuous switching member (82). 82) and the switching actuator (74) are transmitted by gear transmission, and angle detection means (90) for detecting the angle of the continuous switching member (82) is provided. It is a seedling transplanter.

  According to the fifth aspect of the present invention, an HST (23) is provided on the traveling vehicle body (2), and an engine (20) is provided behind the HST (23), and the driving force of the engine (20) is increased. 2. A transmission shaft (100) for transmission to the HST (23) is provided, and a wind generating member (101) for generating cooling air toward the rear of the machine body is provided on the transmission shaft (100). The seedling transplanting machine according to any one of claims 1 to 4.

  According to the sixth aspect of the present invention, auxiliary wind-up members (102, 102) are provided on both the left and right sides of the transmission shaft (100), and the auxiliary wind-up members (102, 102) are connected to the transmission shaft (100). Driven by the transmission endless body (103) wound around the cooling wind generated in the left-right direction by the wind-generating member (101), the auxiliary wind-generating member (102, 102) can be used either forward or backward. The seedling transplanting machine according to claim 5, wherein the air is blown toward the crab.

  According to the seventh aspect of the invention, of the auxiliary wind members (102, 102) provided on the left and right sides, the air blowing direction of the left and right auxiliary wind members (102) is the front side of the machine body, A radiator (104) for cooling the engine (20) is arranged to be biased to the left and right other sides with the wind direction of the auxiliary wind member (102) on the other side as the rear side of the fuselage, and further, the HST (23) The seedling transplanter according to claim 5, wherein an HST wind-up member (105) for raising cooling air in the left-right direction of the machine body is provided on the output shaft.

  According to the invention described in claim 1, the switching operation member (73) for operating the partial strip clutch (71a, 71b,...) Is provided with a smaller number of switches (94a, 71a, 71b,...) Than the partial strip clutch (71a, 71b,. 94b,...) Are arranged horizontally to reduce the number of parts and the cost.

  Further, when the leftmost one of the switches (94a, 94b,...) Is operated, the leftmost one of the partial strip clutches (71a, 71b,...) Is disconnected and the switch (94a, 94b,. First of all, when the right end is operated, the one located at the right end of the partial clutches (71a, 71b,...) Is cut off, so that the operator is unlikely to press the first switch and the operability is improved. To do.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, after the switch (94a, 94b,...) Is first operated at the left end or the right end, When the second end is operated at the end opposite to the operated side, all of the partial strip clutches (71a, 71b,...) Are configured to cut all but the second operated end. Since the erroneous operation of disengaging the partial strip clutches (71a, 71b,...) Is eliminated and the number of operation steps is reduced, the operability is improved.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the transmission switching arm (76, 77a, 77b. Since it is possible to prevent forgetting to disconnect some partial strip clutches (71a, 71b,...) By adopting a configuration in which the strip clutches (71a, 71b,...) Are turned on and off, plant seedlings in unnecessary places. Can be prevented and consumption of seedlings can be reduced.

  Also, one of the partial clutches (71a, 71b,...) Is provided with one main transmission switching arm (76) for turning on and off the one located at the left and right outer ends, and among the switches (94a, 94b,...) First, when the leftmost one is operated, the main transmission switching arm (76) is operated in a direction to cut the partial clutch (71a, 71b,...) Located at the left end, and the switch (71a, 71b,...) First, when the right end is operated, the main transmission switching arm (76) operates in the direction of cutting the right end of the partial strip clutches (71a, 71b,...), Thereby reducing the number of parts. As a result, the structure becomes simple and maintainability is improved.

  According to the fourth aspect of the present invention, in addition to the effect of the third aspect of the present invention, a continuous pin having a contact pin (86) for rotating the transmission switching arm (76, 77a, 77b,...) Is provided. Transmission of the switching member (82) and the switching actuator (74) is performed by gear transmission, and by providing an angle detection means (90) for detecting the angle of the continuous switching member (82), transmission errors are reduced. Therefore, the partial clutch (71a, 71b,...) On / off operation is more reliably performed.

  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, a transmission shaft for transmitting the driving force of the engine (20) to the HST (23) ( 100), by providing a wind generating member (101) that generates cooling air toward the rear of the machine body, it is possible to generate cooling air from the wind generating member (101) by the driving force of the engine (20), The engine (20) can be cooled with this cooling air. Thereby, since overheating can be prevented with a simple configuration, work efficiency is improved.

  According to the invention described in claim 6, in addition to the effect of the invention described in claim 5, the auxiliary wind-up members (102, 102) provided on the left and right sides of the transmission shaft (22) are connected to the transmission shaft (100). ), The auxiliary wind-up member (102, 102) can be driven using the existing driving force.

  In addition, when the cooling air generated in the left-right direction by the wind-up member (101) is blown toward the front of the machine body by the auxiliary wind-up members (102, 102), overheating of the HST (23) can be prevented, Efficiency is improved.

  When the cooling air generated in the left-right direction by the wind-up member (101) is blown toward the rear of the machine body by the auxiliary wind-up members (102, 102), the engine (20) can be cooled more appropriately. Since the overheating can be prevented, the work efficiency is improved.

  According to the seventh aspect of the invention, in addition to the effect of the fifth aspect of the invention, the air blowing direction of the left and right side auxiliary wind-up members (102) is set to the front side of the machine body, and the left and right side auxiliary wind-up members The wind direction of the wind member (102) is the rear side of the fuselage, and the radiator (104) that cools the engine (20) is biased to the left and right sides, and further, the output shaft of the HST (23) By providing the HST wind-up member (105) for raising the cooling air in the direction, the cooling air is circulated around the traveling vehicle body (2) while cooling the engine (20) and HST (23), and the radiator (104 ) Can efficiently inhale the hot air flowing backward, so that the engine (20) and the like are efficiently cooled, overheating is prevented, and work efficiency is improved.

It is a side view of the seedling transplanter concerning a first embodiment of the present invention. It is a top view of the seedling transplanting machine of FIG. FIG. 2 is a block diagram showing a connection configuration of a partial strip clutch of the seedling transplanting machine of FIG. It is the figure which looked at the switch of the switching operation member of the seedling transplanter of FIG. 1 from the front. It is the front view and bottom view of the partial stripe clutch switching mechanism of the seedling transplanter of FIG. It is a front view of the partial strip clutch of the seedling transplanting machine of FIG. It is a front view at the time of adding a potentiometer to the partial stripe clutch of the seedling transplanter of FIG. It is operation | movement explanatory drawing of the partial strip clutch switching mechanism of the seedling transplanting machine of FIG. It is operation | movement explanatory drawing of the partial strip clutch switching mechanism of the seedling transplanting machine of FIG. It is a top view which shows the cooling air passage route of the seedling transplanter concerning 2nd embodiment of this invention. It is a top view which shows the cooling air passage path | route of the seedling transplanter concerning 3rd embodiment of this invention. It is a top view which shows the cooling air passage path | route of the seedling transplanter concerning 4th embodiment of this invention. It is a top view which shows the cooling air passage path | route of the seedling transplanter concerning 5th embodiment of this invention. It is a top view which shows the cooling air passage route of the seedling transplanter concerning 6th embodiment of this invention. It is a top view of the mission case periphery of the seedling transplanter concerning 7th embodiment. It is a side view around the steering handle of the seedling transplanter according to the eighth embodiment. It is the figure which looked at the steering handle of the seedling transplanter of Drawing 16 from the front. It is a side view of the periphery of a fertilizer application machine of a seedling transplanter concerning a ninth embodiment. It is a side view around a fertilizer application machine of a seedling transplanter concerning a 10th embodiment.

  Embodiments specifically configured based on the above technical idea will be described below with reference to the drawings. The forward and backward directions and the left and right directions are based on the forward direction of the seedling transplanter.

  FIG. 1 is a side view of an 8-row seedling transplanter according to the first embodiment of the present invention, and FIG. 2 is a plan view. In the seedling transplanting machine according to the first embodiment of the present invention, a seedling planting unit 4 is mounted on the rear side of the traveling vehicle body 2 so as to be movable up and down via the lifting link mechanism 3, and the fertilizer device 5 is disposed on the rear upper side of the traveling vehicle body 2. Main body portion is provided.

  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 that are drive wheels. A mission case 12 is disposed at the front of the fuselage. A front wheel final case 13 is provided on the side, and the 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.

  The front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and the rear wheel gear case 18 is freely rotatable with a rear wheel rolling shaft provided horizontally in the front and rear sides at the center of the rear end of the main frame 15 as a fulcrum. The rear wheel 11 is attached to a rear wheel axle that is supported by the rear wheel and protrudes 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, 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 placement unit 51 that transfers the seedlings downward by the seedling feeding belt 51b, and the seedling supplied to the seedling outlet 51a is planted in the field by the seedling planting tool 54. A seedling planting device 52 and a pair of left and right line drawing markers 19 for drawing the aircraft path in the next process to the topsoil surface 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 leveling rotor 27 (a combination of the first leveling rotor 27a and the second leveling rotor 27b is simply referred to as leveling rotor 27) is attached to the seedling planting portion 4. The seedling placement unit 51 is configured to slide in the left-right direction using a support roller 65a of a 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 as a rail.

  On the left and right sides of the front part of the traveling vehicle body 2, a pair of spare seedling frames 38 on which supplementary seedlings are placed are provided.

  FIG. 3 is a block diagram showing the connection configuration of the partial strip clutches 71a, 71b,... In FIG. 3, the figure seen from the top about the part of the planting transmission case 50 and the seedling planting apparatus 52 is shown.

  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. 52d.

  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 71a, 71b ... are 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 in the “disconnected” state, and the corresponding first seedling planting device 52a, second seedling planting device 52b, third seedling planting device 52c, and second The transmission of the driving force to the 4 seedling planting device 52d is cut off.

  In the seedling transplanting machine according to the first embodiment of the present invention, the switching operation member 73 for operating the partial strip clutch switching mechanism 70 has a number of switches 94a, 94b that is one fewer than the partial strip clutches 71a, 71b, 71c, 71d. , 94c are arranged horizontally. FIG. 4 shows a view of the switches 94a, 94b, 94c as seen from the front (that is, a view seen from the rear of the vehicle body). These switches 94a, 94b, 94c are arranged on the upper surface of the column provided with the steering handle 34 or the like. The first switch 94a is a switch located at the left end, the third switch 94c is a switch located at the right end, and when the operator first operates the first switch 94a at the left end, the partial clutch switching mechanism 70 is activated, When the first partial clutch 71a located at the left end of the partial strip clutches 71a, 71b, 71c, 71d is disengaged and the operator first operates the third switch 94c at the right end, the partial strip clutches 71a, 71b, 71c, The fourth partial strip clutch 71d located at the right end of 71d is disengaged.

  When the operator firstly operates the first switch 94a at the left end and then disengages the second partial strip clutch 71b in addition to the first partial strip clutch 71a, the first switch is secondly again according to the configuration of the control program. 94a is operated and the second switch 94b is operated. When the operator disengages the second and third partial strip clutches 71b and 71c in addition to the first partial strip clutch 71a, that is, when only the fourth partial strip clutch 71d located at the right end is put into the state, When the first switch 94a positioned at the left end is pressed, and then the third switch 94c positioned at the right end is pressed, the first to third partial strip clutches 71a other than the fourth partial strip clutch 71d positioned at the right end are pressed. , 71b, 71c.

  Conversely, when the operator first operates the third switch 94c at the right end and then disengages the third partial strip clutch 71c in addition to the fourth partial strip clutch 71d, the second is again performed according to the configuration of the control program. The third switch 94c is operated or the second switch 94b is operated. When the worker disengages the second and third partial strip clutches 71b and 71c in addition to the fourth partial strip clutch 71d, that is, when only the first partial strip clutch 71a located at the left end is put into the state, After the third switch 94c located at the right end is pushed, and then the first switch 94a located at the left end is pushed second, the second to fourth partial clutch 71b other than the first partial clutch 91a located at the left end are pressed. , 71c, 71d.

  When the partial clutches 71a, 71b, 71c, 71d in the disengaged state are reengaged, the switch that is first operated by the control program is operated again, or a separately provided reset switch is operated. Or

  The switching operation member 73 for operating the partial strip clutches 71a, 71b,... Is configured by horizontally arranging switches 94a, 94b,..., One fewer than the partial strip clutches 71a, 71b,. Cost.

  In addition, when the leftmost one of the switches 94a, 94b,... Is operated, the leftmost of the partial clutches 71a, 71b,... Can be cut off, and among the switches 94a, 94b,. First, since the one located at the right end of the partial strip clutches 71a, 71b,... Can be disconnected when the one at the right end is operated, the switch that the operator should press first is less likely to be mistaken, and the operability is improved.

  When the switches 94a, 94b,... Are operated first on the left end or on the right end, and then on the end opposite to the operated side, the partial clutches 71a, 71b, By cutting the ones other than the side end that was operated secondly, there is no mistaken operation of cutting all the partial clutches 71a, 71b,... To do.

  In FIG. 5, the structure of the partial strip clutch switching mechanism 70 of the seedling transplanter of FIG. 1 is shown. FIG. 5 (a) shows a front view of the partial strip clutch switching mechanism 70 of the seedling transplanter, and FIG. 5 (b) shows a bottom view. Further, FIG. 6 shows a front view in which the illustration of the clutch wire is omitted in order to make it easy to understand the front-rear relations of the members constituting the partial strip clutch switching mechanism 70.

  On the front side of the support frame 75 of the switching mechanism, the main transmission switching arm 76, the first sub transmission switching arm 77a, and the second sub transmission switching arm 77b are respectively a first rotation fulcrum 79 and a second rotation fulcrum. 80 and the third rotation fulcrum 81 are attached so as to be rotatable.

  The main transmission switching arm 76 is a flat plate member having a ring-shaped contact pin sliding hole 84 formed in the upper part. The sub-transmission switching arms 77a and 77b are flat plate members having a "<" shape having a bent portion. These switching arms are arranged in the order of the main transmission switching arm 76, the first sub transmission switching arm 77a, and the second sub transmission switching arm 77b in this order from the front side in the front-rear direction.

  The respective ends of the first clutch wire 72a and the fourth clutch wire 72d are connected to the lower end of the main transmission switching arm 76. The second clutch wire 72b is connected to the lower end of the first sub-transmission switching arm 77a, and the third clutch wire 72c is connected to the lower end of the second sub-transmission switching arm 77b. Yes.

  5 (a), 5 (b) and 6 show a state where none of the clutch wires is pulled, that is, the first partial strip clutch 71a, the second partial strip clutch 71b, the third partial strip clutch 71c and the fourth portion. All the partial strip clutches 71d are in the “ON” state.

  In this partial strip clutch switching mechanism 70, the main transmission switching arm 76 and the first and second auxiliary transmission switching arms 77a and 77b are sequentially rotated, so that the partial strip clutch 71a. It is configured to turn on and off in order. When the main transmission switching arm 76 rotates clockwise (clockwise) about the first rotation fulcrum 79 from the state shown in FIG. 5A, the first clutch wire 72a is pulled and the first partial strip is pulled. The clutch 71a is “disengaged”. On the other hand, when the main transmission switching arm 76 rotates counterclockwise (counterclockwise) around the first rotation fulcrum 79 from the state shown in FIG. 5A, the fourth clutch wire 72d is pulled, The 4-part clutch 71d is “disengaged”.

  When the first sub-transmission switching arm 77a rotates clockwise around the second rotation fulcrum 80 from the state shown in FIG. 5A, the second clutch wire 72b is pulled, and the second partial clutch 71b becomes “OFF”. When the second auxiliary transmission switching arm 77b rotates clockwise around the third rotation fulcrum 81 from the state shown in FIG. 5A, the third clutch wire 72c is pulled, and the third partial strip clutch 71c becomes “OFF”.

  On the back side of the support frame 75 of the switching mechanism, a fan-shaped continuous switching member 82 having teeth formed on arcuate edges is attached to be rotatable about a switching gear rotation fulcrum 87. . The teeth formed at the arcuate edge of the continuous switching member 82 mesh with the teeth of the switching mechanism drive gear 83 that is rotated by the switching actuator 74 that is an electric motor. The continuous switching member 82 is switched to the switching mechanism drive gear 83. Is rotated around the switching gear rotation fulcrum 87.

  A contact pin 86 is erected at a position close to the arc-shaped edge of the continuous switching member 82. A contact pin moving hole 85 is formed in the support frame 75 at a position corresponding to the contact pin 86 so as to penetrate the contact pin 86. The contact pin moving hole 85 is an arc-shaped long hole with the switching gear rotation fulcrum 87 as the center, and the contact pin 86 moves in the contact pin moving hole 85 when the continuous switching member 82 rotates. It has become. The contact pin 86 arranged in a configuration that penetrates the switching gear rotation fulcrum 87 has a length that also penetrates the contact pin sliding hole 84 of the main transmission switching arm 76 arranged on the foremost side.

  Therefore, when the contact pin 86 moves along with the rotation of the continuous switching member 82, the contact pin 86 moves while contacting and pushing the inner edge of the contact pin sliding hole 84, so that the posture of the main transmission switching arm 76 is changed.

Specifically, when the continuous switching member 82 rotates counterclockwise from the state shown in FIG. 5A, the inner edge portion on the right side of the contact pin sliding hole 84 is pushed by the contact pin 86, and the main transmission The upper part of the switching arm 76 is moved to the right. Since the main transmission switching arm 76 rotates about the first rotation fulcrum 79, the main transmission switching arm 76 rotates clockwise and the first clutch wire 72a is pulled.
On the other hand, when the continuous switching member 82 rotates clockwise from the state shown in FIG. 5A, the left inner edge portion of the contact pin sliding hole 84 is pushed by the contact pin 86, and the main transmission switching arm 76. Move the top of to the left. Therefore, the main transmission switching arm 76 rotates counterclockwise around the first rotation fulcrum 79, and the fourth clutch wire 72d is pulled.

  Since the contact pin 86 protrudes to the nearer side than the first sub-transmission switching arm 77a, when the contact pin 86 moves and reaches the peripheral position of the first sub-transmission switching arm 77a, the first Therefore, the posture of the first sub-transmission switching arm 77a is changed.

  Specifically, when the continuous switching member 82 rotates counterclockwise from the state shown in FIG. 5A, the contact pin 86 rotates counterclockwise around the switching gear rotation fulcrum 87. Before the contact pin 86 contacts the first sub-transmission switching arm 77a, the posture of the sub-transmission switching arm 77a does not change, but after the contact pin 86 contacts the sub-transmission switching arm 77a, the sub-transmission switching arm 77a. The right peripheral part of the “ku” character is pushed upward to the right. Since the first sub-transmission switching arm 77a rotates about the second rotation fulcrum 80, when the right peripheral portion of the "<" is pushed upward, it rotates clockwise. The two clutch wires 72b are pulled.

  On the other hand, when the continuous switching member 82 rotates clockwise from the state shown in FIG. 5A, the contact pin 86 rotates clockwise around the switching gear rotation fulcrum 87. Before the contact pin 86 contacts the first sub-transmission switching arm 77a, the posture of the sub-transmission switching arm 77a does not change, but after the contact pin 86 contacts the sub-transmission switching arm 77a, the sub-transmission switching arm 77a. The left peripheral portion of the “ku” character is pushed upward. Since the auxiliary transmission switching arm 77a rotates around the second rotation fulcrum 80, when the left peripheral portion of the "<" is pushed upward, it also rotates clockwise, The clutch wire 72b is pulled. The bending angle of the “<” character of the first sub-transmission switching arm 77a and the position of the second rotation fulcrum 80 are determined so as to perform the above-described operation.

  Since the contact pin 86 protrudes to the nearer side than the second sub-transmission switching arm 77b, when the contact pin 86 moves and reaches the position of the peripheral edge of the sub-transmission switching arm 77b, then the sub-transmission switching arm 77b. Therefore, the posture of the sub-transmission switching arm 77b is changed.

  The sub-transmission switching arm 77b also operates in the same manner as the first sub-transmission switching arm 77a after the contact pin 86 contacts the peripheral edge as the contact pin 86 moves.

  That is, when the continuous switching member 82 rotates counterclockwise or clockwise, after the contact pin 86 contacts the peripheral edge of the second sub-transmission switching arm 77b, the contact pin As 86 rotates, the sub-transmission switching arm 77b rotates clockwise around the third rotation fulcrum 81, and the third clutch wire 72c is pulled.

  However, the first sub-transmission switching arm 77a and the second sub-transmission switching arm 77b do not rotate simultaneously because the position of the contact pin 86 when the contact pin 86 contacts is different. Therefore, the second clutch wire 72b and the third clutch wire 72c are not pulled simultaneously.

  When the contact pin 86 rotates counterclockwise, it comes into contact with the first sub-transmission switching arm 77a before the second sub-transmission switching arm 77b, so that the second clutch wire 72b is first pulled. After that, when the contact pin 86 further rotates counterclockwise, it comes into contact with the second auxiliary transmission switching arm 77b and the third clutch wire 72c is also pulled.

  On the other hand, when the contact pin 86 rotates clockwise, it comes into contact with the second sub-transmission switching arm 77b before the first sub-transmission switching arm 77a, so that the third clutch wire 72c is first pulled. Thereafter, when the contact pin 86 further rotates clockwise, the second clutch wire 72b is also pulled in contact with the first sub-transmission switching arm 77a. The bending angle of the “<” character of the second sub-transmission switching arm 77b and the position of the third rotation fulcrum 81 are determined so as to perform the above-described operation.

  In the present embodiment, an angle detection member 90 that is a potentiometer for detecting the rotation angle of the continuous switching member 82 is provided in order to accurately control the rotation angle of the continuous switching member 82.

  FIG. 7 shows a front view of the partial strip clutch switching mechanism 70 when a potentiometer as the angle detection member 90 is added to the partial strip clutch of the seedling transplanter of FIG. The angle detection member 90 is provided on the back side of the support frame 75, that is, on the back side surface of the support frame 75 toward FIG. The angle detection member 90 has a meter arm 91 in which a position detection hole 92 is formed on the distal end side, and is configured to detect the rotation angle of the meter arm 91.

  In the continuous switching member 82, a position detection pin 93 is erected toward the back side, and is fitted in a position detection hole 92 formed in the meter arm 91. The position detection hole 92 is a long hole, and when the continuous switching member 82 rotates, the position detection pin 93 moves while contacting the position detection hole 92 to rotate the meter arm 91. Since the rotation angle of the meter arm 91 changes corresponding to the rotation angle of the continuous switching member 82, the angle detection member 90 detects the rotation angle of the meter arm 91, so that the continuous switching member 82 can be accurately detected. A rotation angle is required.

  Thereby, the continuous switching member 82 can be controlled to have an appropriate rotation angle. That is, since the position where the contact pin 86 is rotated and stopped can be accurately controlled, the rotation postures of the main transmission switching arm 76, the first sub transmission switching arm 77a, and the second sub transmission switching arm 77b. Can be controlled accurately.

  Next, the detailed operation of the partial strip clutch switching mechanism 70 will be described. FIGS. 8A to 8C are front views of the partial clutch switching mechanism 70 when the continuous switching member 82 is rotated counterclockwise. 8 (a) to 8 (c), respectively, when the continuous switching member 82 is rotated 30 °, 60 ° and 90 ° counterclockwise with reference to the position of the continuous switching member 82 shown in FIG. The front view of is shown. FIGS. 9A to 9C are front views of the partial clutch switching mechanism 70 when the continuous switching member 82 is rotated clockwise. 9 (a) to 9 (c), respectively, when the continuous switching member 82 is rotated clockwise by 30 °, 60 ° and 90 ° with reference to the position of the continuous switching member 82 shown in FIG. The front view of is shown. In FIGS. 8A to 8C and FIGS. 9A to 9C, the illustration of the clutch wire is omitted for easy understanding of the posture of each switching arm.

  When the continuous switching member 82 shown in FIG. 6 rotates 30 ° counterclockwise about the switching gear rotation fulcrum 87, the contact pin 86 rotates while contacting the right inner edge portion of the contact pin sliding hole 84. As shown in FIG. 8A, the main transmission switching arm 76 rotates clockwise about the first rotation fulcrum 79.

  When the main transmission switching arm 76 rotates clockwise, the first clutch wire 72a connected to the lower end of the main transmission switching arm 76 is pulled, and the first partial clutch 71a is in the “disconnected” state. It becomes. That is, at this time, only the first partial strip clutch 71a is in the “off” state while the second partial strip clutch 71b, the third partial strip clutch 71c, and the fourth partial strip clutch 71d are in the “on” state. Accordingly, at this time, only the first seedling planting device 52a stops operating.

  When the continuous switching member 82 further rotates counterclockwise from the position illustrated in FIG. 8A and rotates counterclockwise to a position of 60 ° with respect to the position illustrated in FIG. 6, the contact pin 86 is moved to the first position. As shown in FIG. 8 (b), the first sub-transmission switching arm 77a is rotated in the second direction. It rotates clockwise around the fulcrum 80.

  When the first sub-transmission switching arm 77a rotates clockwise, the second clutch wire 72b connected to the lower end of the sub-transmission switching arm 77a is pulled, and the second partial clutch 71b is disengaged. ”State.

  The shape of the right inner edge portion of the contact pin sliding hole 84 of the main transmission switching arm 76 is such that when the main transmission switching arm 76 is rotated to the position shown in FIG. The shape follows the inner edge shape of the moving hole 85.

  Therefore, when the continuous switching member 82 rotates from the position rotated 30 ° counterclockwise as shown in FIG. 8A to the position rotated 60 ° counterclockwise as shown in FIG. The rotation angle of the transmission switching arm 76 hardly changes, and the posture shown in FIG. That is, at this time, the first partial clutch 71a is maintained in the “disengaged” state. Therefore, in the state shown in FIG. 8B, the first partial clutch 71a and the second partial clutch 71b are “disengaged” while the third partial clutch 71c and the fourth partial clutch 71d are in the “on” state. ”State. Accordingly, at this time, the first seedling planting device 52a and the second seedling planting device 52b stop operating.

  When the continuous switching member 82 further rotates counterclockwise from the position illustrated in FIG. 8B and rotates counterclockwise to a position of 90 ° with respect to the position illustrated in FIG. 6, the contact pin 86 is moved to the second position. As shown in FIG. 8C, the second sub-transmission switching arm 77b is turned to the third rotation fulcrum. Rotate clockwise about 81.

  When the second sub-transmission switching arm 77b rotates clockwise, the third clutch wire 72c connected to the lower end of the second sub-transmission switching arm 77b is pulled, and the third partial clutch 71c. Becomes “OFF”. When the continuous switching member 82 is rotated from the position rotated counterclockwise by 60 ° shown in FIG. 8B to the position rotated counterclockwise by 90 ° shown in FIG. The rotation angle of the transmission switching arm 76 hardly changes, and the posture shown in FIGS. 8A and 8B is substantially maintained. That is, at this time, the first partial clutch 71a is maintained in the “disengaged” state. In addition, the shape of the peripheral portion of the “<” character on the right side of the first sub-transmission switching arm 77a is such that the first sub-transmission switching arm 77a is rotated to the position shown in FIG. Moreover, it is set as the shape which follows the inner edge shape of the contact pin moving hole 85 by front view.

  Therefore, when the continuous switching member 82 rotates from the position rotated 60 ° counterclockwise as shown in FIG. 8B to the position rotated 90 ° counterclockwise as shown in FIG. The rotation angle of the first sub-transmission switching arm 77a hardly changes, and the posture shown in FIG. 8B is substantially maintained. That is, at this time, the second partial strip clutch 71b is maintained in the “disengaged” state. Therefore, in the state shown in FIG. 8C, the first partial clutch 71a, the second partial clutch 71b, and the third partial clutch 71c are " “Off”. Therefore, at this time, the first seedling planting device 52a, the second seedling planting device 52b, and the third seedling planting device 52c stop operating.

  As described above, by rotating the continuous switching member 82 counterclockwise, as the rotation angle of the continuous switching member 82 increases, the first partial clutch 71a, the second partial clutch 71b, and the third portion. It is possible to switch from “ON” to “OFF” in the order of the strip clutch 71c.

  Next, when the continuous switching member 82 shown in FIG. 6 rotates 30 ° clockwise around the switching gear rotation fulcrum 87, the contact pin 86 rotates while contacting the left inner edge portion of the contact pin sliding hole 84. Therefore, as shown in FIG. 9A, the main transmission switching arm 76 rotates counterclockwise around the first rotation fulcrum 79. When the main transmission switching arm 76 rotates counterclockwise, the fourth clutch wire 72d connected to the lower end of the main transmission switching arm 76 is pulled, and the fourth partial clutch 71d is in the “disconnected” state. It becomes. That is, at this time, only the fourth partial strip clutch 71d is in the “off” state while the first partial strip clutch 71a, the second partial strip clutch 71b, and the third partial strip clutch 71c are in the “on” state. Accordingly, at this time, only the fourth seedling planting device 52d stops its operation.

  When the continuous switching member 82 further rotates clockwise from the position shown in FIG. 9A and rotates clockwise to a position of 60 ° with reference to the position shown in FIG. 6, the contact pin 86 is moved to the second position. Since the left peripheral portion of the “<” character of the sub-transmission switching arm 77 b is rotated while being pushed upward to the left, the second sub-transmission switching arm 77 b is third rotated as shown in FIG. It rotates clockwise around the fulcrum 81. When the second sub-transmission switching arm 77b rotates clockwise, the third clutch wire 72c connected to the lower end of the second sub-transmission switching arm 77b is pulled, and the third partial clutch 71c. Becomes “OFF”.

  The shape of the left inner edge portion of the contact pin sliding hole 84 of the main transmission switching arm 76 is such that when the main transmission switching arm 76 is rotated to the position shown in FIG. The shape follows the inner edge shape of the moving hole 85. Therefore, when the continuous switching member 82 is rotated from the position rotated clockwise by 30 ° shown in FIG. 9A to the position rotated clockwise by 60 ° shown in FIG. The rotation angle of the transmission switching arm 76 hardly changes, and the posture shown in FIG. 9A is substantially maintained. That is, at this time, the fourth partial clutch 71d is maintained in the “disengaged” state.

  Accordingly, in the state shown in FIG. 9B, the third partial strip clutch 71c and the fourth partial strip clutch 71d are “disengaged” while the first partial strip clutch 71a and the second partial strip clutch 71b are in the “on” state. ”State. At this time, the third seedling planting device 52c and the fourth seedling planting device 52d stop operating.

  When the continuous switching member 82 further rotates clockwise from the position shown in FIG. 9B and rotates clockwise to a position of 90 ° with reference to the position shown in FIG. 6, the contact pin 86 is moved to the first position. Since the left peripheral portion on the left side of the "<" character of the sub-transmission switching arm 77a is rotated upward, as shown in FIG. 9C, the first sub-transmission switching arm 77a is moved to the second rotational fulcrum. Rotate clockwise around 80.

  When the first sub-transmission switching arm 77a rotates clockwise, the second clutch wire 72b connected to the lower end of the first sub-transmission switching arm 77a is pulled, and the second partial clutch 71b. Becomes “OFF”.

  When the continuous switching member 82 is rotated from the position rotated clockwise by 60 ° shown in FIG. 9B to the position rotated counterclockwise by 90 ° shown in FIG. The rotation angle of the transmission switching arm 76 hardly changes, and the posture shown in FIGS. 9A and 9B is substantially maintained. That is, at this time, the fourth partial clutch 71d is maintained in the “disengaged” state.

  Further, the shape of the peripheral portion of the left end portion of the second sub-transmission switching arm 77b is such that the contact pin 86 is further moved after the second sub-transmission switching arm 77b is rotated to the position shown in FIG. 9B. When rotating clockwise, the contact pin 86 that rotates is kept in contact with the second auxiliary transmission switching arm 77b so that the posture of the second auxiliary transmission switching arm 77b is maintained.

  Therefore, when the continuous switching member 82 is rotated from the position rotated clockwise by 60 ° shown in FIG. 9B to the position rotated clockwise by 90 ° shown in FIG. The rotation angle of the second sub-transmission switching arm 77b hardly changes, and the posture shown in FIG. 9B is substantially maintained. That is, at this time, the third partial strip clutch 71c is maintained in the “disengaged” state. Accordingly, in the state shown in FIG. 9C, only the first partial strip clutch 71a remains in the “ON” state, and the second partial strip clutch 71b, the third partial strip clutch 71c, and the fourth partial strip clutch 71d are “ “Off”. At this time, the second seedling planting device 52b, the third seedling planting device 52c, and the fourth seedling planting device 52d stop operating.

  As described above, by rotating the continuous switching member 82 clockwise, as the rotation angle of the continuous switching member 82 increases, the fourth partial strip clutch 71d, the third partial strip clutch 71c, and the second portion It is possible to switch from “ON” to “OFF” in the order of the strip clutch 71b.

  The transmission switching arms 76, 77a, 77b,... Are configured so that the partial strip clutches 71a, 71b,. Since it is possible to prevent forgetting to cut, it is possible to prevent seedlings from being planted in unnecessary places and to reduce the consumption of seedlings.

  In addition, one main transmission switching arm 76 for turning on and off one of the partial strip clutches 71a, 71b,... Located at the left and right outer ends is provided, and the switch 94a, 94b,. Then, the main transmission switching arm 76 operates in the direction of cutting the leftmost one of the partial strip clutches 71a, 71b,..., And when the switch 71a, 71b,. , 71b,... Operating the main transmission switching arm 76 in the direction of cutting the one located at the right end, the number of parts can be reduced, so that the structure becomes simple and the maintainability is improved.

  Further, since the three switching arms of the main transmission switching arm 76, the first sub transmission switching arm 77a, and the second sub transmission switching arm 77b are configured to overlap in the front-rear direction, the partial clutch switching mechanism 70 can be reduced in size. The space for installing the partial clutch switching mechanism 70 can be reduced.

  An angle at which the continuous switching member 82 provided with the contact pin 86 for rotating the transmission switching arms 76, 77a, 77b,... And the switching actuator 74 is transmitted by gear transmission and the angle of the continuous switching member 82 is detected. By providing the detection means 90, transmission errors can be reduced, so that the partial clutches 71a, 71b,.

  It is also possible to link the pair of left and right drawing markers 19, 19 and the switches 94a,. In this case, a part of the line clutch 71a,.

  FIG. 10 shows a cooling air passage path of the seedling transplanter according to the second embodiment of the present invention. What is indicated by a thick line in FIG. 10 is a main passage route of the cooling air. The seedling transplanter according to the first embodiment includes the HST 23 and the engine 20 on the traveling vehicle body 2, and the engine 20 is located behind the HST 23. The driving force of the engine 20 is transmitted to the HST 23 by abutting the transmission shaft 100 from the engine 20 with the input shaft from the HST and directly connecting with the shaft joint. Is provided. The wind generating member 101 has a propeller structure having a plurality of blades, and fixes the pitch of the blades so that the cooling air branches from the axial center to the left and right sides as shown in FIG. The wind generating member 101 is fixed to the transmission shaft 100 and rotates together with the transmission shaft 100 to blow cooling air toward the rear of the machine body. The cooling air passes through the radiator 104 and is guided to the rear of the vehicle body.

  By providing a wind generating member 101 that generates cooling air toward the rear of the fuselage on the transmission shaft 100 that transmits the driving force of the engine 20 to the HST 23, cooling air is generated from the wind generating member 101 by the driving force of the engine 20. Since the engine 20 can be cooled with this cooling air, overheating can be prevented with a simple configuration, so that the work efficiency is improved.

  FIG. 11 shows a cooling air passage path of the seedling transplanter according to the third embodiment of the present invention. The difference from the seedling transplanting machine according to the second embodiment is that auxiliary wind members 102 and 102 are provided on both the left and right sides of the transmission shaft 100. The auxiliary wind-up member 102 is provided between the output rotary body 106 that is a V-belt pulley fixed to the transmission shaft 100 and the input rotary body 107 that is also fixed to the shaft of the auxiliary wind-up member 102 and is also a V-belt pulley. A transmission endless body 103 as a belt is wound and driven by the transmission endless body 103. In the seedling transplanter according to the third embodiment, the blades of the wind-up member 101 are allowed to flow toward the sides, and the pitch of the blades of the auxiliary wind-up members 102 and 102 provided on the left and right sides is determined by the machine body. Set to guide the cooling air toward the rear.

  The auxiliary wind-up members 102, 102 provided on the left and right sides of the transmission shaft 100 are driven by the transmission endless body 103 wound around the transmission shaft 100, so that the auxiliary wind-up members 102, 102 are used with the existing driving force. Can be driven.

  When the cooling wind generated in the left-right direction by the wind-up member 101 is blown toward the rear of the machine body by the auxiliary wind-up members 102, 102, the engine 20 can be cooled more appropriately, and overheating can be prevented. Will improve.

  FIG. 12 shows a cooling air passage path of the seedling transplanter according to the fourth embodiment of the present invention. The difference from the seedling transplanter according to the third embodiment is that the pitch of the blades of the auxiliary wind members 102 and 102 provided on the left and right sides is set so as to guide the cooling air toward the front of the machine body.

  When cooling air generated in the left-right direction by the wind-up member 101 is blown toward the front of the machine body by the auxiliary wind-up members 102 and 102, overheating of the HST 23 can be prevented, and work efficiency is improved.

  In FIG. 13, the cooling air passage path | route of the seedling transplanter concerning 5th embodiment of this invention is shown. The difference from the seedling transplanter according to the third embodiment is that auxiliary auxiliary wind members 102, 102 provided on the left and right sides of the transmission shaft 100 are located on one side of the left and right sides (right side of the machine body in this embodiment). The cooling air is guided to the front side of the body by the wind member 102, and the cooling air is guided to the rear side of the body by the auxiliary wind members 102 located on the left and right other sides (the left side of the body in the present embodiment). is there. In addition, the radiator 104 that cools the engine 20 is arranged to be biased to the left side of the body, and the HST wind-up member 105 that winds cooling air in the left-right direction of the body is provided on the output shaft of the HST 23.

  The air blowing direction of the auxiliary wind-up member 102 on the left and right side is the front side of the machine body, the wind direction of the auxiliary wind-up member 102 on the left and right side is the rear side of the machine body, and the radiator 104 that cools the engine 20 is Further, the HST wind-up member 105 for raising the cooling air in the left-right direction of the fuselage is provided on the output shaft of the HST 23, so that the cooling air is supplied to the traveling vehicle body 2 while cooling the engine 20 and the HST 23. Further, the radiator 104 can efficiently suck the hot air flowing backward, so that the engine 20 and the like are efficiently cooled, and overheating can be prevented, so that work efficiency is improved.

  FIG. 14 shows a cooling air passage path of the seedling transplanter according to the sixth embodiment. The difference from the seedling transplanter according to the fifth embodiment is that the radiator 104 is arranged such that the right side is the front and the left side is the rear. With this arrangement, the cooling air can easily pass through the radiator 104, and cooling can be performed more efficiently.

  In FIG. 15, the top view of mission case 12 periphery of the seedling transplanter concerning 7th Embodiment is shown. Conventionally, a side clutch and a brake are configured in series, and the brake is operated after the side clutch is operated by a clutch shifter. This necessitates brake clearance management, which increases the cost. In the seedling transplanter according to the seventh embodiment, a clutch shifter 111 is provided for the side clutch 112, and a brake shifter 110 is provided for the brake 113. Thereby, the operation of the side clutch 112 and the brake 113 is stabilized, and the cost is reduced. Further, the clutch shifter 111 and the pitman arm are connected by an interlocking rod 115. By making the brake system independent, the components below the mission case 12 can be reduced. Further, the brake shifter 110 is operated by a pedal via a cable with a spring attached, and the number of brake discs is further increased. With this configuration, weight reduction can be achieved with a simple configuration.

  16 is a side view around the steering handle 34 of the seedling transplanter according to the eighth embodiment. FIG. 17 is a front view of the steering handle 34 of the seedling transplanter shown in FIG. Figure). The seedling transplanter according to the present embodiment is provided with an annular steering wheel as the steering handle 34 and a liquid crystal monitor panel 116 for displaying the operating state of the machine. The upper end of the monitor panel 116 is set lower than the upper end of the steering handle 34. Further, the shape of the steering handle 34 is such that an annular member and a support at the center of rotation are connected by two radial supporters, and the two supporters are positioned below the support. With this configuration, when the operator looks at the monitor panel 116, the steering handle 34 is not obstructed and workability is improved.

  FIG. 18 shows a side view around the fertilizer application device 5 of the seedling transplanter according to the ninth embodiment. The seedling transplanter according to the present embodiment employs a configuration in which hot air after the engine 20 is cooled is taken into the fertilizer application device 5. In the seedling transplanter according to the present embodiment, the hot air intake port of the hot air duct 117 is provided at a relatively high position of the radiator 104. In addition, a blocking plate 118 is provided on the lower side of the hot air duct 117 so as to face upward. By adopting such a configuration, the hot air duct 117 does not take in cooling air having a low temperature supplied from a relatively low position of the radiator 104.

FIG. 19 shows a side view around the fertilizer application device 5 of the seedling transplanter according to the tenth embodiment. In the seedling transplanter according to the present embodiment, the shield plate 118 is disposed in the vicinity of the radiator 104 so that the hot air duct 117 does not take in the cooling air having a low temperature supplied from a relatively low position of the radiator 104. Provide backward and downward.

1 seedling transplanter 2 traveling body 20 engine 23 HST
51 Seedling placement part 52 Seedling planting device (52a first seedling planting device, ...)
71 partial strip clutch (71a first partial strip clutch, ...)
73 Switching operation member 74 Switching actuator 75 Support frame 76 Main transmission switching arm 77 Sub transmission switching arm (77a First sub transmission switching arm, ...)
82 continuous switching member 86 contact pin 90 angle detection means 94 switch (94a first switch,...)
100 Transmission shaft 101 Wind generating member 102 Auxiliary wind generating member 103 Transmission endless body 104 Radiator 105 HST wind generating member

Claims (7)

A seedling placement part (51) for loading a plurality of seedlings behind the traveling vehicle body (2);
A plurality of seedling planting devices (52a, 52b,...) For taking seedlings from this seedling placement section (51) and planting them in the field;
In a seedling transplanting machine provided with partial strip clutches (71a, 71b, ...) for turning on and off the transmission of driving force to any of these seedling planting devices (52a, 52b, ...),
A switching operation member (73) for operating these partial strip clutches (71a, 71b,...) Is horizontally arranged with a smaller number of switches (94a, 94b,...) Than the partial strip clutches (71a, 71b,...). Configure
When the leftmost one of these switches (94a, 94b,...) Is operated first, the partial clutch (71a, 71b,.
A seedling transplanter characterized in that when the switch (94a, 94b,...) Is first operated at the right end, the partial clutch (71a, 71b,...) At the right end is disconnected. After first operating the left end or right end of the switches (94a, 94b, ...),
When the second end of the opposite end of the operated side,
The seedling transplanting machine according to claim 1, wherein the partial strip clutch (71a, 71b, ...) is configured to cut a portion other than the side end operated second. Transmission switching arms (76, 77a, 77b,...) For turning on and off the partial strip clutches (71a, 71b,...)
Of the partial strip clutches (71a, 71b,...), One main transmission switching arm (76) for turning on and off the one located at the left and right outer ends, and the partial strip clutch (71a, 71b,...) And one or more sub-transmission switching arms (77a, 77b,...) For turning on / off those not located at the left and right outer ends,
These transmission switching arms (76, 77a, 77b...) Are configured to turn on and off the partial clutches (71a, 71b,...) In order from either the left or right outer end,
The switching operation member (73) is configured by horizontally arranging two or more switches (94a, 94b,...)
When the leftmost one of these switches (94a, 94b,...) Is operated first, the main transmission switching arm (76) moves in the direction to cut the leftmost one of the partial strip clutches (71a, 71b,...). Work,
When the rightmost one of the switches (94a, 94b,...) Is operated first, the main transmission switching arm (76) operates in a direction to cut the rightmost of the partial strip clutches (71a, 71b,...). The seedling transplanter according to claim 1 or 2, wherein On the support frame (75)
The transmission switching arm (76, 77a, 77b,...) Arranged rotatably,
A continuous switching member (82) having a contact pin (86) for rotating these transmission switching arms (76, 77a, 77b,...), And a switching actuator (74) for driving the continuous switching member (82). ) And
Transmission of the continuous switching member (82) and the switching actuator (74) is performed by gear transmission,
The seedling transplanter according to claim 3, further comprising angle detection means (90) for detecting an angle of the continuous switching member (82). On the traveling vehicle body (2),
An HST (23) and an engine (20) are provided behind the HST (23),
A transmission shaft (100) for transmitting the driving force of the engine (20) to the HST (23);
The seedling transplanter according to any one of claims 1 to 4, wherein a wind-up member (101) for generating cooling air toward the rear of the machine body is provided on the transmission shaft (100). . Auxiliary wind members (102, 102) are provided on the left and right sides of the transmission shaft (100),
The auxiliary wind generating member (102, 102) is driven by a transmission endless body (103) wound around the transmission shaft (100),
The cooling air generated in the left-right direction by the wind-up member (101) is blown by the auxiliary wind-up members (102, 102) toward either the front of the body or the back of the body. The seedling transplanter described in 1. Of the auxiliary wind members (102, 102) provided on the left and right sides,
The air blowing direction of the left and right auxiliary wind members (102) is the front side of the machine body, and the wind direction of the left and right auxiliary wind members (102) is the machine body rear side
The radiator (104) for cooling the engine (20) is arranged so as to be biased to the left and right sides,
The seedling transplanter according to claim 5, further comprising an HST wind-up member (105) for raising cooling air in the left-right direction of the machine body on the output shaft of the HST (23).

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