JP2009023388A - Riding type work machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding type work machine equipped with a rotation interlocking controller capable of planting seedlings at appropriate positions even in multiple row planting such as eight row planting. <P>SOLUTION: A traveling distance detecting means 205 is provided for detecting a traveling distance of a traveling vehicle body 2 coupled with a work device 4. When the traveling distance during turning reaches a predetermined value, a buzzer 186 sounds and a steering wheel 34 of the traveling vehicle body 2 is operated to turn 90 degrees, for example. Further, when the traveling distance reaches the predetermined value, the buzzer 186 is sounded again, and the steering handle 34 of the traveling vehicle body 2 is made operable to turn 90 degrees again, for example. This becomes a guide of a steering operation for an operator, and turning can be performed in a desired traveling path. Even in the riding type work machine for multiple row planting such as eight row planting, turning in a farm field is made possible without the risk of planting seedlings in a state of a portion being overlapped with a planting row planted the previous time. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a riding type work machine in which a work device such as a seedling planting device is connected to a work vehicle.

The wheels arranged on the left and right in the direction of travel of the work vehicle are operated by the steering lever, and the side clutch of the wheel corresponding to the operation of the lever is turned on and off, and the rear of the vehicle is 2. Description of the Related Art A riding type work machine is known that includes a turning interlock control device that automatically performs seedling planting work upon completion of turning of a connected working machine such as a seedling planting apparatus.
JP 2004-344020 A

If a riding type rice transplanter for eight-row planting is used instead of the riding type rice transplanter for six-row planting disclosed in Patent Document 1, the lateral radius of the machine body is large, so that the turning radius of the rice transplanter increases and the turning It is necessary to increase or decrease the degree of the planting, but even if the turning interlock control device disclosed in Patent Document 1 is applied, the turning cannot be sufficiently performed and the seedling is planted in a state where it partially overlaps the previous planting line There was a risk of doing.
Accordingly, an object of the present invention is to provide a riding type work machine provided with a turning interlock control device capable of planting seedlings at an appropriate position even for multi-row planting such as 8-row planting.

The above-mentioned problems of the present invention are solved by the following solution means.
According to the first aspect of the present invention, the working device (4) is connected to the traveling vehicle body (2), and the traveling vehicle body (2) is provided with traveling distance detecting means (205) for detecting the traveling distance, and the traveling distance during turning is reduced. This is a riding type work machine provided with notifying means (186) for notifying when a predetermined value is reached, and also provided with steering means (34) capable of changing the steering degree of the traveling vehicle body (2).

  According to the first aspect of the invention, when turning the handle (34), it becomes a guide for the steering operation of the operator, can be turned along a desired traveling route, and is used for multi-row planting such as 8-row planting. Even if it is a type | mold work machine, turning in a farming field is attained without fear of planting a seedling in the state which overlapped with the last planting strip.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 and 2 are a side view and a plan view of a riding type rice transplanter equipped with a fertilizer application device as a granular material feeding device which is an embodiment using the present invention. In this riding type rice transplanter 1 with a fertilizer application, a seedling planting portion 4 is mounted on the rear side of the traveling vehicle body 2 via an elevating link device 3 so that the seedling planting portion 4 can be moved up and down. Is provided.

  The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10 and 10 and a pair of left and right rear wheels 11 and 11 as drive wheels, and a transmission case 12 is disposed at the front of the fuselage. Front wheel final cases 13, 13 are provided on the left and right sides of the case 12, and the left and right front wheels are mounted on the left and right front wheel axles projecting outward from the respective front wheel support portions capable of changing the steering direction of the left and right front wheel final cases 13, 13. 10 and 10 are respectively attached. 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, with a rear wheel rolling shaft provided horizontally in the front and rear sides at the rear left and right center of the main frame 15 as a fulcrum. The rear wheels 11 and 11 are attached to a rear wheel axle that is supported in a freely rolling manner and projects outwardly from the rear wheel gear cases 18 and 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 a transmission in the 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 cases 13 and 13 to drive the front wheels 10 and 10, and the rest is transmitted to the rear wheel gear cases 18 and 18 to drive the rear wheels 11 and 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 also the fertilizer application device 5 by the fertilization transmission mechanism 28. Is transmitted to.

  The upper part of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the seat 31, and a handle 34 for steering the front wheels 10 and 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 through the step 35 falls on the field. The rear part on the floor step 35 is a rear step 36 that also serves as a rear wheel fender.

  Further, on both the left and right sides of the front part of the traveling vehicle body 2, the spare seedling platforms 38, 38 on which the replenishment seedlings are placed can be pivoted to a position projecting laterally from the machine body and a position housed inside. Is provided.

  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. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. ing. 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 cylinder 46 is expanded and contracted by hydraulic pressure. The upper link 40 pivots up and down, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

  The seedling planting section 4 has an eight-row planting structure, a seedling planting transmission case 50 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to supply seedlings to the seedling outlets 51a of each row one by one. When all the seedlings for one horizontal row are supplied to the seedling outlet 51a, ..., the seedling feed belt 51b, ..., the seedling stage 51 for transferring the seedling downward by the seedling feeding belt 51, ..., seedlings supplied to the seedling outlet 51a, ... are planted in the field. A seedling planting device 52 to be attached is provided with a pair of left and right drawing markers (not shown) for drawing the aircraft path in the next stroke to the topsoil surface. 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 to 57 in contact with the mud surface of the field, the floats 55 to 57 slide while leveling the mud surface, and the seedling planting device 52,. Planted. Each of the floats 55 to 57 is rotatably attached so that the front end side moves up and down according to the unevenness of the field topsoil surface, and the vertical movement of the front part of the center float 55 is an angle-of-attack control sensor (see FIG. The planting depth of the seedling is always maintained constant by switching the hydraulic valve that controls the lifting hydraulic cylinder 46 according to the detection result to raise and lower the seedling planting unit 4.

  The fertilizer applicator 5 feeds the granular fertilizer stored in the fertilizer hopper 60 by a fixed amount by the feeding portions 61,..., And applies the fertilizer to the left and right sides of the floats 55-57 with the fertilizer hoses 62,. (Not shown), guided to the fertilizer guide, and a grooving body (not shown) provided on the front side of the fertilizer guide. . Air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilizer hose 62 through the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hose 62 is forced by the wind pressure. It is designed to be transported.

  A rotor 27 (27a, 27b) which is an example of a leveling device is attached to the seedling planting unit 4. In addition, the seedling mount 51 is configured to slide in the left-right direction using a support roller 65a of a rectangular support frame 65 having a full width in the left-right direction and the vertical direction that supports the entire seedling planting unit 4 as a rail.

  The rotor 27 is supported by the following support structure. That is, a beam member 66 supported at both ends 65b of the support frame 65 of the seedling stage 51 so that the upper end thereof is freely rotatable, a support arm 67 fixed to both ends of the beam member 66, and a rotation to the support arm 67. A freely attached rotor support frame 68 is provided, and a drive shaft 70 (70a, 70b) of the rotor 27 (side rotor 27a and center rotor 27b) is attached to the lower end of the rotor support frame 68. Further, the lower end portion of the rotor support frame 68 is connected to a connecting member 71 rotatably attached to the seedling planting transmission case 50.

  The rotor 27 b located in front of the center float 55 is arranged in front of the rotors 27 a located in front of the side float 56 and the middle float 57 in relation to the arrangement positions of the floats 55 to 57. Therefore, the power to the drive shaft 70a of the rotor 27a is transmitted from the gear in the gear case 18 of the rear wheel 11, and the drive shafts 70a of both the rotors 27a and 27a are connected to the inner end of the vehicle body to the drive shaft 70b of the rotor 27b. Power is transmitted from each part.

The rotor 27b is suspended by a pair of link members 76 and 77 whose upper ends are supported by the beam member 66 via a spring 78.
A bent piece 82 is fixed to the lower end portion of the rotor vertical position adjusting lever 81, and the bent piece 82 is rotatably supported by the support frame 65. When the lever 81 is rotated in the left-right direction of the vehicle, the lever 81 is bent near the protrusion 66a fixedly supported by the beam member 66 that is rotatably supported by the side members 65b of the support frame 65. The piece 82 rotates up and down. Since the bent piece 82 is locked below the protrusion 66a, the protrusion 66a rotates upward about the beam member 66 by the lever 81 rotating in the right direction of the machine body. By the rotation of the projecting portion 66a, the end of the first link member 76 opposite to the connecting portion with the beam member 66 is also rotated upward about the beam member 66. By rotating the first link member 76 upward, the rotor 27b can be lifted upward via the second link member 77 and the spring 78. When the rotor 27b is moved upward, the rotor 27a is also simultaneously moved upward via the drive shaft 70b and the drive shaft 70a.
Since the rotor vertical position adjusting lever 81 is provided at substantially the center of the vehicle body 2, it is easy to balance left and right when the rotors 27a and 27b are moved up and down.

  Further, when the seedling planting section 4 is lowered to the field, the cable 45 for returning the seedling planting section 4 to the horizontal position is connected to the pulling spring section including the link members 76 and 77 of the center rotor 27b and the spring 78 and the hydraulic piston 46. (The position in FIG. 1 is corrected).

  Thus, by providing the cable 45 in addition to the swing mechanism by the spring 78 of the center rotor 27b, the center rotor 27b can be returned to the horizontal position every time the seedling planting part 4 is lowered from the raised position. The holding position of 27b can be stabilized.

  The rotational power of the engine 20 is transmitted to the hydraulic transmission HST23 via a belt transmission 21 or the like, and the output from the hydraulic transmission HST23 is an input shaft (not shown) of the transmission case 12 via a belt (not shown). To be told.

  The seedling planting unit 4 is mounted on the main frame 15 of the traveling vehicle body 2 so as to be movable up and down by the lifting link device 3. The configuration for raising and lowering and the configuration of the seedling planting unit 4 will be described. First, a piston upper end portion of a general hydraulic cylinder 46 (FIG. 1) whose base is rotatably provided on the traveling vehicle body 2 is connected to the lifting link device 3, and a hydraulic pump (not shown) provided on the traveling vehicle body 2. ) To supply and discharge the hydraulic oil to and from the hydraulic cylinder 46, and extend and retract the piston of the hydraulic cylinder 46 so that the seedling planting portion 4 connected to the lifting link device 3 is moved up and down. .

Here, the configuration of a portion where the steering wheel 34 steers the front wheels 10 will be described with reference to FIGS.
The steering handle 34 is fixed to the upper part of the steering shaft provided in the front cover 32, and the rotation of the steering shaft is decelerated via a steering transmission gear provided in the transmission case 12 and transmitted to the output shaft 174. The And the lower end of the output shaft 174 protrudes from the bottom face of the mission case 12, and the pitman arm 175 is fixed. The front left and right sides of the pitman arm 175 and the left and right front wheel final cases 13 and 13 (FIG. 1) are connected by left and right rods 176 and 176 (FIG. 4).

  Accordingly, when the steering handle 34 is rotated, the steering wheel 34 is transmitted to the steering shaft, the steering transmission gear, the output shaft 174, the pitman arm 175, the left and right rods 176 and 176, and the left and right front wheel final cases 13 and 13, and the left and right front wheels 10 and 10 are transmitted. Is steered from side to side.

  Further, a right arm 171R that is operated by depressing a pedal (not shown) is fixed to the right end portion of the counter shaft 170 by welding. A left arm 171L is fixed to the left end portion of the counter shaft 170 by welding. Further, left and right connecting rods 172L and 172R are provided from the lower portions of the right arm 171R and the left arm 171L toward the rear, and the rear ends of the left and right connecting rods 172L and 172R operate left and right rear wheel brake devices (not shown). Are connected to left and right brake operation arms 86J and 86J for operating the left and right shifters 85J and 85J.

  On the other hand, an operating roller 177 is rotatably provided on the upper surface of the rear part of the pitman arm 175, and a notch 178 cut out in a U shape in plan view so as to surround the left and right sides of the operating roller 177 is provided. A follower 179 having the transmission case 12 is rotatably supported on the bottom surface of the mission case 12. The left and right side portions of the driven body 179 are connected to the front portions of the left and right rods 180 and 180 connected to the left and right clutch operating arms 86I and 86I. Accordingly, when the steering handle 34 is turned to the right by a predetermined amount (the amount that the operator turns to the right with the intention of turning the aircraft to the right), the pitman arm 175 is also turned to the right, and the operation roller 177 is moved in the (c) direction. In order to push the left side surface 178a of the notch 178 of the driven body 179, the driven body 179 is rotated in the direction (D), the right rod 180 is pulled, and the right clutch operating arm 86I is operated to the right. Because the side clutch is disengaged and the right rear wheel 7 on the turning center side is in a free-wheeling state, the right rear wheel 7 does not damage the cultivator, and the mud surface is roughened by lifting a large amount of mud. The right turn is smooth and clean.

  On the contrary, when the steering handle 34 is turned to the left by a predetermined amount or more, the pitman arm 175 is also rotated to the left, the operation roller 177 is rotated in the opposite (C) direction, and the right side surface 178b of the notch 178 of the driven body 179 is rotated. In order to push, the driven body 179 is rotated in the opposite (d) direction, the left rod 180 is pulled, the left clutch operating arm 86I is operated, the left side clutch is disengaged, and the left rear wheel 11 on the turning center side is idle. Since it is in a rolling state, the left rear wheel 11 does not damage the cultivator, and the mud surface is not roughened by lifting a large amount of mud, making the left turn smooth and clean.

Further, left and right sensor pressing pieces 182 and 182 are provided on the upper surface of the front portion of the pitman arm 175. When the steering handle 34 is rotated 200 degrees to either the left or right, an auto lift fixed to the bottom surface of the mission case 12 is provided. The switch 183 is turned ON (the steering handle 34 rotates up to 360 to 400 degrees to the left and right).
These members 175 to 183 shown in FIG. 3 and FIG.

  In the embodiment described above, an example in which the side clutch (not shown) of the rear wheel 11 inside the turn is turned off by operating the steering handle 34 at a predetermined angle or more is shown. It may be provided on the panel 33 so that the side clutch can be manually turned off. Alternatively, the side clutch may be manually disengaged with the side clutch pedal.

  Next, the control structure which raises the seedling planting part 4 automatically at the time of reverse drive is demonstrated. First, as shown in FIG. 5, when the change lever 90 (forward / reverse lever) is operated to reverse speed, there is provided a backlift switch 191 that comes into contact with a contact piece 190 provided at the base of the change lever 90 and is turned on. The electromagnetic solenoid that operates the electromagnetic hydraulic valve 161 is controlled by the seedling planting device raising means of the control device 163 (FIG. 6), and the seedling planting unit 4 is raised to the maximum position by the hydraulic cylinder 46. It is configured.

  As described above, when the change lever 90 is operated to the reverse speed, the seedling planting part 4 is automatically raised to the maximum position, so that the aircraft can be turned to turn the aircraft at the edge of the field. Since the seedling planting part 4 is automatically raised to the maximum position when it is moved backward toward the cocoon, the seedling planting part 4 can be prevented from colliding with the cocoon and being damaged, and workability is good.

  Further, when the auto-lift switch 183 shown in FIG. 6 is turned on when the steering handle 34 is rotated 200 degrees to the left or right, an electromagnetic solenoid that operates the electromagnetic hydraulic valve 161 by the seedling planting part raising means of the control device 163. And the seedling planting portion 4 is raised to the maximum position by the hydraulic cylinder 46.

  As described above, when the steering handle 34 is rotated to the left or right as much as possible in order to turn the aircraft at the heel, the auto lift switch 183 is turned on, and the seedling planting unit 4 is automatically raised to the maximum position. Therefore, the operation of raising the seedling planting portion 4 during the turning of the body is unnecessary, and the body can be turned efficiently and the workability is good.

  On the other hand, the operation panel 33 is provided with an automatic lift changeover switch 192 (FIG. 6) for switching between a state in which the seedling planting unit 4 is automatically raised and a state in which the seedling planting unit 4 is not raised. When the back lift switch 191 is turned on or the auto lift switch 183 is turned on as described above, the seedling planting unit 4 automatically rises automatically by the seedling planting device raising means of the control device 163. Is done. When the automatic lift changeover switch 192 is turned off, the seedling planting unit 4 is not automatically raised even if the backlift switch 191 is turned on or the autolift switch 183 is turned on.

  In this way, with one automatic lift changeover switch 192, the seedling planting part 4 can be in a state where it is not automatically raised even if the backlift switch 191 is turned on or the autolift switch 183 is turned on. The configuration is simpler than the configuration in which switches for turning on and off each of the backlift and the autolift are provided separately, and the state of both can be switched with one switch, so that operation errors are reduced and workability is good.

  If the automatic lift changeover switch 192 is turned OFF so that the seedling planting part 4 is not automatically raised even if the back lift switch 191 is turned ON or the auto lift switch 183 is turned ON, the aircraft is moved backward. Even if the change lever 90 is operated at a reverse speed when moving to a barn etc., the seedling planting part 4 does not automatically rise, so it can be moved backward with the seedling planting part 4 lowered, and the upper part of the barn entrance or in the barn It is possible to avoid a situation in which the seedling planting part 4 is hit against other members. In addition, when planting around a vine in a deformed field such as a fan shape or a gourd, a planting operation is performed while turning the steering handle 34 along a curved heel. At this time, an automatic lift changeover switch 192 is used. When the steering wheel 34 is turned to the automatic position, if the steering handle 34 is rotated more than 200 degrees to the left or right, the seedling planting part 4 is automatically raised and the planting operation cannot be performed. However, the automatic lift changeover switch 192 is turned off. Then, even if the steering handle 34 is rotated to the left or right by 200 degrees or more, the seedling planting part 4 does not rise, so that the planting operation can be performed, and the seedling planting operation can be appropriately performed even in the modified farm field.

  Further, in the rice transplanter 1 having the above-described configuration, the control device 163 according to the present embodiment makes a turn for automatically performing various operations such as seedling planting during turning based on the detection of the rotation speed of the rear wheel 11 inside the turning. Interlocking control is possible. In particular, when the rear wheel 11 inside the turn is steered by a predetermined angle or more, the turn interlock control can be performed.

The concept of this control is shown in FIGS.

  That is, with the steering handle 34 turned off and the side clutch of the rear wheel 11 inside the turn disengaged, the number of rotations of the left and right drive shafts (transmission shaft) (not shown) is detected, and the inner rear wheel 7 during the turn is detected. When the rotational speed of the transmission shaft exceeds the set value N1, the seedling planting section 4 is lowered. Thereafter, the steering wheel 34 is turned off after the transmission shaft rotational speed of the rear wheel 7 is set to the set value N2 and the operation of the seedling planting tool 126 enters the “cut” state (= the seedling planting device 52 moves up). This is a mechanism for making the planting “enter” when the rotational speed n of the transmission shaft of the rear wheel 11 until the start becomes equal to or greater than the total value.

FIG. 9 shows a flow of the turning interlock control.
First, the rotational speeds of the transmission shafts of the left and right rear wheels 11 and 11 are detected by the transmission shaft rotational speed sensor 205, and set value N1 (inner drive shaft (transmission shaft) rotation signal setting from turning start to turning 90 ° of the body). Value), N2 (setting value of the inner drive shaft (transmission shaft) rotation signal from the start of turning shown in FIG. 8 to the distance (b) between the turn of 180 degrees), θ1 (setting of the steering wheel turning during straight running operation) (Lower limit value) and θ2 (Upper limit value of steering wheel cut angle during straight running operation) are set.

  Next, setting dials 206a to 208b for adjusting the set values of the rotation speeds N1 and N2 and the handle cutting angles θ1 and θ2 in order to cope with differences in the field conditions such as the hardness and water depth of the field, the depth of the tillage, and the like. The correction value n0 is set according to FIG.

  Whether the seedling planting tool 126 of the seedling planting unit 4 is in a seedling planting state or not is detected in the state of the control device 163 accompanying the operation of the finger lever 166, and the planting from “on” to planting “cut” The rotation speed n of the transmission shaft of the rear wheel 11 from when the operation of the seedling planting tool 126 enters the “on” state until the operation of the seedling planting tool 126 becomes the “cut” state. Detection is made at 205 and the value (n) is stored. Next, when the turning angle (steering angle) θ of the steering handle 34 is detected by a steering angle sensor (potentiometer) 193 (FIG. 6) provided on the shaft of the steering handle 34, when the vehicle is not going straight (θ1 <θ <θ2) Detects whether the vehicle is turning in the left or right direction.

  When turning the rice transplanter 1 to plant seedlings on the next planting line at the end of the field or the like, the handle 34 is turned to disengage the side clutch of the rear wheel 11 inside the turn, When the rotational speed of the drive shaft reaches the first set rotational speed N1 from the start of turning (the distance (b) between the start of turning 90 degrees from the start of turning according to the travel locus shown in FIG. 8 at the first set rotational speed N1). ), The buzzer 186 is sounded for a long time, the handle 34 is rotated strongly, and the aircraft is turned 90 degrees.

  When the left turn is in progress, the rotational speed of the transmission shaft of the left rear wheel 11 is detected, and when the rotational speed n1 is n1 ≧ N1 + n0, the aircraft has turned 90 degrees or more from the start of turning, so the seedling planting section 4 Lower. The headland is leveled as the seedling planting part 4 descends. Also, after turning the aircraft 90 degrees, stop sounding the buzzer 186 and move forward while loosening the turning degree of the handle 34, and when the rotational speed n2 of the left and right drive shafts of the left rear wheel 11 becomes n2 ≧ N2 + n + n0 ( The vehicle travels a distance (b) between the start of turning of FIG. 8 and the turn of 180 degrees at the set rotation speed N2, and the long buzzer 186 is sounded and the handle 34 is rotated strongly again to turn the body 90 degrees. After turning the aircraft 90 degrees, the buzzer 186 is stopped and the handle 34 is advanced while loosening the turning degree to travel distance (b) + (c), and the 180 degree turn is completed. At this time, the turning shown in FIG. 9 is completed, and the planting clutch “enters” is performed at the set rotational speed N2, and the seedling planting tool 126 is operated to start planting the seedling.

  Further, after the rotation speed of the left and right drive shafts of the rear wheel 11 reaches the first set rotation speed N1 from the start of turning and the long buzzer 186 is sounded to turn the handle 34 by 90 degrees, the turning of the handle 34 is loosened. If the distance does not return to the vicinity of the center, the interval between the next long buzzer 186 sounds is shortened, and the rotational speed of the left and right drive shafts of the rear wheels 11 turns even if the travel distance (b) is shortened. When the second set rotational speed N2 is reached from the beginning, the long buzzer 186 is sounded and the handle 34 is turned 90 degrees again.

  Also, instead of the buzzer 186, the center mascot 29 blinks or sounds, for example, "Please return the handle" or "Please turn the handle and align", etc. Anyway.

  Thus, even a riding type work machine for multi-row planting such as 8-row planting can be turned in the field without fear of planting seedlings in a state of partially overlapping the previous planting strip.

In the case of a right turn, the same control is performed as in the case of a left turn.
Note that during the turning control, the hydraulic sensitivity of the hydraulic cylinder 46 of the seedling planting unit 4 is insensitive (not switched to the rising side) between “lowering” of the seedling planting unit 4 and “entering” the seedling planting unit 4. It is desirable to set the center float 55 and the like to the front-up state by setting the state. This can be done by setting the control target of the center float sensor 169 so that the center float 55 is in the forwardly raised state. By turning the center float 55 in the forwardly raised state, the turning trace can be leveled, Ground treatment can be performed easily and accurately.

  Since the rotational speed of the transmission shaft (drive shaft) of the rear wheel 11 with the side clutch disengaged is detected in this way, it is less susceptible to slip and the like than the rotational speed detection of the rear wheel 11 to which power is transmitted. There are features. Further, since the rotational speed of the drive shaft that rotates faster than the rear wheel 11 is detected, the measurement accuracy can be easily increased. As a result, there is an effect that the planting start of the seedlings for each planting line becomes substantially constant (the headland width (D) is constant).

  Further, the start button (switch) 184 for turning control for performing various operations of the turning control shown in FIG. 9 may be used as a button for setting the start position for seedling planting.

  In this way, forgetting to operate the button by combining the button for starting the seedling and setting the start position for seedling planting and the start button (switch) 184 for turning control for performing the series of turning control operations. Can be prevented.

  Generally, the operation speed of the seedling planting tool 126 of the seedling planting device 52 is set to be constant so that the seedling planting intervals (between plants) are equal. Then, the operation speed of the seedling planting tool 126 is planted at an unequal speed, which is slower than that at the time of seedling planting compared to the time of seedling planting. Pulsates. At this time, if the vehicle speed is high, the vibration of the traveling vehicle body 2 caused by the rough field is added to the pulsation of the seedling planting tool 126, and the pulsation is amplified.

  Therefore, in this embodiment, a configuration is adopted in which sparse planting can be performed by selecting an appropriate speed stage of a sub-transmission device (not shown), and a transmission lever 16 and a planting clutch case for shifting the vehicle speed in FIG. As shown in the figure explaining the connection relationship of the sparse / standard planting switch lever 118 that operates 25, the sparse / standard planting switch lever 118 is operated in the direction of arrow A from the sparse planting side of the solid line to change the dotted line position. When moved to the standard planting side, the inter-plant shift shifter (not shown) protruding from the planting clutch case 25 provided with the rotation base of the sparse planting / standard planting switching lever 118 is operated, A gear mechanism (not shown) in the planting clutch case 25 changes the seedling planting interval of the seedling planting tool 126 from the loose planting side to the standard planting side.

  At the same time, the vehicle speed regulating plate 47 connected to the other end of the cable 119 is connected to the rotation base of the sparse planting / standard planting switching lever 118 via the cable 119, and the arrow B around the rotation fulcrum 47a. The shift lever 16 can be moved to a higher speed side by moving in the direction.

  This is because the pin 16a protruding from the rotating base of the speed change lever 16 can move the speed change lever 16 to the higher speed side along the lever guide hole 16c of the speed change lever guide plate 16b supported by the airframe. is there.

  However, the end of the vehicle speed regulating plate 47 opposite to the connecting portion with the cable 119 with respect to the rotation fulcrum 47a of the vehicle speed regulating plate 47 is always attached in the direction opposite to the arrow B direction by the spring 48 supported by the machine body. Therefore, when the sparse planting / standard planting switching lever 118 moves to the sparse planting side of the solid line and when the cable 119 is disconnected, the pivot base of the speed change lever 16 is connected to the hook portion at the tip of the vehicle speed regulating plate 47. The pin 16a projecting from is locked, and the rotation of the speed change lever 16 is restricted so that the vehicle speed is on the deceleration side, so that traveling safety can be maintained.

  As shown in the side view of the lower end part of the seedling stage 51 in FIG. 11A and the plan view of the lower end part of the seedling stage 51 in FIG. A shaft 51 d is provided for guiding the seedlings of the face seedbed supported by the joints 51 c provided on the side walls on both sides of the mounting table 51 upward. A circular plate 51da is attached to one end of the shaft 51d. The shaft 51d can be taken out from the joint 51c and used as a scraping bar when the fertilizer is clogged in the residual fertilizer collection pipe (horizontally long) of the fertilizer application device 5.

  As shown in the rear view of the seedling stage 51 in FIGS. 12 (a) and 12 (b), the seedling stage 51 is provided with a spraying device 63 for fertilizer and medicine (for example, insecticide) from the fertilizer application device 5. . At this time, if the planting part frame 51e that does not move laterally is provided with a fertilizer (or medicine) outlet for the number of strips, the fertilizer (or medicine) is seeded to both ends of the seedling by using the lateral movement of the seedling stage 51. Can do.

Next, the seedling planting device 52 will be described in detail.
A side view of the seedling planting device 52 is shown in FIG. 13, and an internal transmission mechanism diagram is shown in FIG. A fixed support body 120 is provided integrally with the seedling planting transmission case 50 at the rear end of the seedling planting transmission case 50, and a rotating body (rotary case) 121 is provided inside the fixed support body 120 with a shaft 122 a by a bearing 122. The center is pivotably fitted. The rotating body 121 is provided with three final shafts 125, 125, and 125 that are rotatable about a rotation axis (sun gear shaft) 124 at a phase of 120 degrees with respect to each other. The seedling planting tools 126 and 126 are integrally attached to both left and right ends protruding from the 125 rotating bodies 121.

  A drive gear 130 that rotates integrally with the rotating body 121 is provided inside the rotating body 121. By rotating the drive gear 130 with an input gear 131 provided at the rear end of the planting transmission unit 50, the rotating body 121 rotates in the direction of arrow B (FIGS. 13 and 16). Note that a transmission clutch from the sprocket 132a to the input gear 131 of the chain transmission 132 that transmits to the input gear 131 has a stop clutch (畦 clutch) 160 that stops the input gear 131 at a predetermined phase when the power transmission is cut off. FIG. 14) is provided. The configuration of the stop clutch 160 will be described later.

  Although the spring 162 for elastically supporting the assembly position of the stop clutch 160 to the transmission shaft 50a is assembled, the shaft diameter of the mounting portion of the spring 162 of the transmission shaft 50a is made smaller than the shaft diameter of the other transmission shaft 50a. Thus, the sprocket 164 integrated with the follower of the stop clutch 160 can be stopped on the shoulder (step portion) that can be connected to the shaft diameter of the spring 162 mounting portion of the transmission shaft 50a and another shaft diameter. Assembling of 164 is facilitated, and the sprocket 164 for transmitting power to the sprocket 132a of the chain transmission device 132 can be reduced in size.

FIG. 15 shows a left side view of the inside of the seedling planting device 52, and FIG. 16 shows a right side view.
FIG. 15 shows the meshing state of the drive gear 130 and the input gear 131. The number of teeth of the drive gear 130 is three times the number of teeth of the input gear 131, and the drive gear 130 has three positions (0 °, 120 °, 240 ° from the center of rotation based on the meshing position with the input gear 131 in FIG. Is a non-equal-diameter gear whose maximum diameter is the maximum diameter, and the input gear 131 has a minimum diameter at one place (a position of 0 ° with respect to the meshing position of the drive gear 130 in FIG. 15) marked with a circle C. It is a non-equal diameter gear. Therefore, when the drive gear 130 meshes with the input gear 131 at the positions of 0 °, 120 °, and 240 °, the rotation speed of the drive gear 130 increases, and the rotation speed of the drive gear 130 changes in a 1/3 cycle.

Further, since a gear train for transmission to the final shafts 125, 125, 125 is provided inside the rotating body 121, the interlocking relationship of this gear train will be described.
The rotation gear 121 meshed with the internal gear 121a (FIG. 16) fixed to the inner surface of the case of the fixed support 120 is rotated by the rotation of the drive gear 130 meshed with the input gear 131. 135 rotates in conjunction with the rotation of the rotating body 121 while moving on a circular orbit about the sun gear shaft 124 of the rotating body 121. The rotating gear 135 is loosely fitted together with the first eccentric gear 136 to a support shaft 134 whose ends are fixedly supported on both side walls of the rotating body 121, and the rotating gear 135 and the first eccentric gear 136 rotate together. A second eccentric gear 137 meshes with the first eccentric gear 136, and the second eccentric gear 137 is fixed to the sun gear shaft 124 whose ends are rotatably supported on both side walls of the rotating body 121. Since the second eccentric gear 137 rotates and the inconstant speed gear 138 rotates because the second eccentric gear 137 rotates, the counter gear 139 that meshes with the sun gear 127 is fixed via the sun gear 127 fixed to the sun gear shaft 124. The final gear 140 meshing with the counter gear 139 is driven. The final gear 140 is individually fixed and supported by three final shafts 125, 125, 125 provided at equal intervals on the circumference around the sun gear shaft 124. The final gears 140, 140, and 140 are also non-circular gears (unequal diameter gears), similarly to the inconstant speed gear 138.

  When the rotating body 121 rotates, three seedling planting tools 126 provided on both sides of the rotating body 121 move on the circular path. At that time, the operation of the rotating gear 135 that is interlocked with the rotation of the rotating body 121 is transmitted to the final shafts 125, 125, 125 via the gear train, and the postures of the seedling transplanters 126, 126, 126 change. Thereby, the seedling planting tool 126 operates so that the tip of the seedling removing claw 147 described later draws a locus P (FIGS. 13 and 15).

  In addition, seedling planting tools 126 are provided on three final shafts 125 provided at approximately equal intervals in the rotation direction of the rotating body 121, and each final shaft 125 supported by the rotating body 121 via a bearing 123 is provided for each. It is rotatably supported by an outer fixed support body 120 attached to the airframe via a bearing 123. Further, bearings 122 for supporting and rotating the rotating body 121 on the airframe are provided on each final shaft 125, and the rotating body 121 is supported by the plurality of bearings 122. Therefore, the bearing 122 can be reduced in size, and therefore rotated. Since the body 121 can be reduced in weight, the rotating body 121 rotates smoothly and the seedling planting accuracy can be improved.

  Since the final shafts 125 are directly supported by the bearings 122, the positional accuracy of each final shaft 125 is improved, such as the amount of seedlings taken from the seedling mount 51 of the seedling planting tool 126 and the seedling planting depth to the field. Improve planting accuracy.

  In addition, the fixed support body of the oil seal 128 for sealing between the fixed support body 120 and the rotating body 121 in which the outer diameter of the bearing 122 in the state where the bearing 122 is assembled to the final shaft 125 is assembled to the outside of the bearing 122. The inner diameter of the assembly to 120 was made smaller. Therefore, when the bearing 122 is assembled between the fixed support body 120 and the rotating body 121, the oil seal assembly surface does not interfere with the bearing 122. Therefore, the oil seal assembly surface is not damaged, and the oil seal 128 is easily damaged. Quality is stable.

  Further, since the position of the bearing 122 is outside the gears 130 and 131 in the rotating body 121, the position of the bearing 122 is on both the left and right sides of the gears 130 and 131 that rotate integrally with the final shaft 125. The rotating body 121 can be supported stably.

  In addition, the alignment position X (see FIGS. 13 and 15) between the seedling planting transmission case 50 and the fixed support 120 is on the rear side of the machine body from the seedling receiving plate 51f (FIGS. 11 and 13) of the seedling mount 51. The fixed support 120 can be assembled to the seedling planting transmission case 50 without being obstructed by the seedling receiving plate 51f of the seedling placing stand 51, and the assembling property is improved as compared with the conventional one.

  Further, a joint mark C (see FIG. 15) for meshing the drive gear 130 and the input gear 131 is fixed before the fixed support 120 and the rotating body 121 are assembled to the seedling planting transmission case 50. Since it exists in the body outer side (rear side) from the rear end of the transmission case 50, the rotating body 121 can be easily assembled to the seedling planting transmission case 50 with the alignment mark C as a mark.

  When the rotating body 121 is assembled to the seedling planting transmission case 50, if the alignment mark C can be seen by the hole 156 of the oil plug provided in the rotating body 121, the seedling planting transmission case 50 and the rotating body 121 are further assembled. In addition to improving the performance, it is possible to easily check the meshing position of the drive gear 130 and the input gear 131 after assembly.

  Further, inside the rotating body 121, a brake cam 142 (FIG. 15) attached so as to rotate integrally with the final shaft 125, and a bifurcated shape that abuts the outer peripheral surface of the brake cam 142 and loosely fits on the fixed shaft 143a. Of the brake arm 143, and a spring 144 that presses the brake arm 143 against the brake cam 142 and the sun gear shaft 124, and a set 145 having a projection 145 that locks inside the spring 144. Is provided.

  This phase shift prevention mechanism brakes the rotation of the final gear 140 when the seedling planting tool 126 is at the seedling extraction position A and the seedling planting position B (planting start position B1, planting end position B2). It absorbs the backlash in the meantime and acts so that the operations of seedling removal and seedling planting described later are performed accurately.

  Further, when the sun gear 127 removes the seedling from the seedling stage 51 (when the seedling is scraped off), the final error of the final shaft 125 (backlash) due to gear backlash does not occur. A spring 144 is provided between the gear 140 via a counter gear 139.

  The member for attaching the rattling spring 144 for killing the operation error (rattle) is on the left and right outer sides of the driving gear 130 for driving the seedling planting tool 126. The rattling spring 144 is the driving gear 130. Therefore, it is on the same side as the final gear 139, and the accuracy of preventing the operation error (backlash) is improved as compared with the prior art.

  The rotational speed of the planting tools 126a to 126c of the seedling planting device 52 of the present embodiment is the highest in the region S near the center of the planting transmission case 50 (near the point B1 of the locus P shown in FIG. 13). The rotation speed is slowed down, so that the seedling transport speed is slowed down, the impact when the planting tools 126a-c enter the field is reduced, and the seedling planting performance is improved.

  For this reason, the constant speed transmission from the gear 131 to the gear 130 is delayed, and the eccentric diameter of the gear 131 that transmits power in which the planting tools 126a to 126c mesh with the gear 130 in the vicinity of the region S is shortened.

  As shown in the side view of the front cover 32 portion in FIG. 17A and the rear view of the front cover 32 portion in FIG. 17B, step on the recess 32a provided below the seat 31 side of the front cover 32 with your foot. By disposing the inter-stock lever 22 that can be operated, it becomes difficult for a foot or the like to hit the inter-stock lever 22, so that an erroneous operation of the inter-stock lever 22 can be prevented.

  Further, by arranging the auxiliary transmission lever 17 in the recess 32a of the front cover 32 in parallel with the partition plate 32b constituting the wall surface of the front cover 32, the auxiliary transmission lever 17 can be arranged at a position where a foot or the like is difficult to hit. is there.

  INDUSTRIAL APPLICABILITY The present invention can be used for a riding type work machine such as a riding type rice transplanter because the operability when turning a multi-row seedling planting work machine such as 8-row planting is good.

It is a side view of the riding type rice transplanter of the Example of this invention. It is a top view of the riding type rice transplanter of FIG. It is a top view which shows the structure of front-wheel steering operation by the steering handle of the riding type rice transplanter of FIG. FIG. 3 is a perspective view showing a configuration of a front wheel steering operation by a steering handle of the riding type rice transplanter of FIG. 1. It is a perspective view of the change lever part of the riding type rice transplanter of FIG. It is a control block diagram of the riding type rice transplanter of FIG. It is a figure which shows the view of the turning interlocking control of the riding type rice transplanter of FIG. It is a figure explaining the traveling control of the turning mode of the rice transplanter of a present Example. It is a flowchart of the turning interlocking control of FIG. It is a figure explaining the connection relation of the speed change lever of the riding type rice transplanter of FIG. 1 and the sparse planting / standard planting switching lever that operates the planting clutch case. It is the side view (FIG. 11 (a)) of the lower end part of the seedling mounting stand of the riding type rice transplanter of FIG. 1, and the top view (FIG. 11 (b)) of the lower end part of the seedling mounting stand. It is a rear view of the seedling mounting part of the riding rice transplanter of FIG. It is a side view of the seedling planting apparatus of the riding rice transplanter of FIG. It is a transmission mechanism figure of the seedling planting apparatus of the riding rice transplanter of FIG. It is an internal left side view of the seedling planting apparatus of the riding rice transplanter of FIG. It is an internal right side view of the seedling planting apparatus of the riding rice transplanter of FIG. It is the side view (FIG. H (a)) and rear view (FIG. 17 (b)) of the front cover part of the riding rice transplanter of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Riding type rice transplanter with fertilizer 2 Traveling vehicle body 3 Elevating link device 4 Seedling planting part 5 Granule feeding device (fertilizer) 10 Front wheel 11 Rear wheel 12 Mission case 13 Front wheel final case 15 Main frame 16 Shift lever 16a Pin 16b Transmission lever guide plate 16c Lever guide hole 17 Sub transmission lever 18 Rear wheel gear case 20 Engine 21 Belt transmission device 22 Stock lever 23 HST
25 Planting clutch case 26 Planting transmission shaft 27 (27a, 27b) Rotor 28 Fertilizer transmission mechanism 29 Center mascot 30 Engine cover 31 Seat 32 Front cover 32a Recess 32b Partition plate 33 Control panel 34 Handle 35 Floor step 36 Rear step 38 Preliminary Seedling stand 40 Upper link 41 Lower link 42 Link base frame 43 Vertical link 44 Connecting shaft 45 Cable 46 Lifting hydraulic cylinder 47 Vehicle speed regulating plate 47a Rotating fulcrum 48 Spring 50 Seedling planting transmission case 50a Transmission shaft 51 Seedling stand 51a Seedling Take-out port 51b Seedling feed belt 51c Joint 51d Shaft 51e Planting part frame 51f Seedling receiving plate 52 Seedling planting device 53 Blower electric motor 55 Center float 56 Side float 57 Middle float 58 Blower DESCRIPTION OF SYMBOLS 9 Air chamber 60 Fertilizer hopper 61 Feeding part 62 Fertilization hose 63 Spreading device 65 Support frame 65a Support roller 65b Both-sides member 66 Beam member 66a Protrusion part 67 Support arm 68 Rotor support frame 70 (70a, 70b) Drive shaft 71 Connecting member 73 Chain case 74 Reinforcement member 76, 77 Link member 78 Spring 81 Rotor vertical position adjustment lever 82 Bending piece 85J, 85J Left and right shifters 86I, 86I Left and right clutch operation arms 86J, 86J Left and right brake operation arms 90 Change lever (forward / reverse lever)
118 Non-planting / Standard planting switching lever 119 Cable 120 Fixed support 121 Rotating body (rotary case) 121a Internal gear 122, 123 Bearing 124 Sun gear shaft 124a Rotating shaft 125 Final shaft 126 Seedling planting tool 127 Sun gear 128 Oil seal 130 Drive gear 131 Input gear 132 Chain transmission device 132a Sprocket 134 Support shaft 135 Rotating gear 136 First eccentric gear 137 Second eccentric gear 138 Inconstant speed gear 139 Counter gear 140 Final gear 142 Brake cam 143 Brake arm 143a Fixed shaft 144 Spring 145 Fastener 147 Seedling claw 156 Lubricant stopper hole 160 Stop clutch (畦 clutch)
161 Electrohydraulic valve 162 Spring 163 Control device 164 Sprocket 166 Finger lever 169 Center float sensor 170 Counter shaft 171 Arm 172L / 172R Left / right connecting rod 174 Output shaft 175 Pitman arm 176, 176 Left / right rod 177 Acting roller 178 Notch 178a Left side 178b Right side 179 Follower 180 Left and right rod 182 Left and right sensor push piece 183 Auto lift switch 184 Start button (switch) for turning control
186 Buzzer 190 Contact piece 191 Back lift switch 192 Automatic lift changeover switch 193 Steering angle sensor (potentiometer)
205 Transmission shaft rotational speed sensors 206a to 208b Setting dial A Rotation linkage mechanism

Claims (1)

The working device (4) is connected to the traveling vehicle body (2), and the traveling vehicle body (2) is provided with traveling distance detection means (205) for detecting the traveling distance,
When the travel distance during turning reaches a predetermined value, a notification means (186) for notifying is provided,
A riding type work machine comprising a steering means (34) capable of changing a steering degree of the traveling vehicle body (2).

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