JPH0833414A - Paddy work machine - Google Patents

Abstract

(57) [Summary] [Purpose] In the case where the working device after that is automatically raised when the traveling direction is set to reverse, the working device is not automatically raised when the paddy working machine is on the road.
Make storage work in the warehouse effective. [Composition] A paddy working machine is constructed by installing a working device 2 on a traveling vehicle body 1 whose traveling direction is changed back and forth by operating a shift lever 21 so as to move up and down by operating a lifting lever 34. A discrimination sensor 39 for discriminating whether the machine is in a paddy field or on the road, and an automatic raising device X for automatically raising the working device 2 when the speed change lever 21 is operated to the reverse side.
The discrimination sensor 39 and the automatic raising device X are connected so that the automatic raising device X does not operate when the paddy working machine is on the road.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a riding type paddy working machine such as a rice transplanter or a direct watering machine.

[0002]

2. Description of the Related Art A riding type paddy working machine is constructed by mounting a working device on a rear portion of a traveling vehicle body so as to move up and down by a link. Then, when the traveling direction of the traveling vehicle body is operated backward,
It has been proposed to provide an automatic lifting device for automatically lifting the work device due to the operation of the shift lever.

[0003]

According to the conventional paddy working machine, for example, when the gear shift lever is operated to the reverse side in order to store the paddy working machine in the warehouse, the working device is automatically raised, and There was a risk that it would hinder the backward movement because of the high position.

[0004]

In order to solve the above-mentioned problems, the present invention has a working device 2 mounted on a traveling vehicle body 1 whose traveling direction is changed back and forth by operating a speed change lever 21.
The paddy work machine is configured to move up and down by the operation of No. 4, and a discrimination sensor 39 for discriminating whether this paddy work machine is in the paddy field or on the road, and the work device when the shift lever 21 is operated to the reverse side. 2 is equipped with an automatic raising device X that automatically raises, and the discrimination sensor 39 and the automatic raising device X are connected so that the above-mentioned automatic raising device X does not operate when the paddy working machine is on the road. It was a characteristic paddy working machine.

[0005]

In the paddy work machine described above, when it is in the paddy field, the automatic lifting device X operates. That is, when the operator operates the speed change lever 21 to move the traveling vehicle body 1 backward, the working device 2 is automatically raised. When the paddy work machine is on the road A (a hard place on the road surface), the discrimination sensor 39
Detects this and transmits it, and the signal stops the operation of the automatic lifting device X. That is, while on the road A, the operator operates the speed change lever 21 to operate the traveling vehicle body 1.
When the vehicle is moved backward, the working device 2 does not automatically rise, and the working device 2 is moved up and down by the operation of the elevating lever 34 by the operator.

[0006]

According to the present invention, when the paddy field working machine is in the paddy field, the automatic lifting device X that automatically lifts the working unit 2 when the paddy field machine moves backward is activated, and when the paddy field working machine is on the road A, The automatic lifting device X stops operating. Then, the operation of the automatic lifting device X and the non-operation thereof are automatically selected by the signal from the discrimination sensor 39. Therefore, in the paddy field, the working device 2 automatically rises when the paddy working machine moves backward, and there is no possibility that the seedlings of the working device 2 or the like will hit the mud surface or the ridge and be damaged. Further, when the paddy working machine is moved backward for storage in the warehouse, the automatic lifting device X does not operate, so that the working device 2 can be lifted to the minimum required height by operating the lifting lever 34.
It does not hinder the subsequent movement.

[0007]

Embodiments of the present invention will be described below. FIG.
As described above, the seedling planting device (working device) 2 is attached by the link 3 after the traveling vehicle body 1 to form a riding type rice transplanter (paddy working machine). As shown in FIGS. 1 and 2, a pair of front wheels 4 and 4 and rear wheels 5 and 5 that rotate and move forward and backward on a hard surface (road A) on a cultivator in a paddy field and on a road are a traveling vehicle body 1.
It is provided in. The engine 6 is attached to the center of the machine frame 7, and the power of the engine 6 is applied to the hydraulic transmission (HS
T) 9 and then the transmission belt 10 to the main gearbox 11
Front wheel frame 12, 12
It is transmitted to the front wheels 4 and 4 via the inner shaft. Yoko rod 13
Is swingably attached to the rear portion of the machine frame 7 by a shaft 14 in the front-rear direction, and rear wheel gear boxes 15, 15 are fixed to both ends thereof. The rear wheels 5, 5 are fixed to the axles 16, 16 protruding from the rear wheel gearboxes 15, 15, and the power in the main gearbox 11 is extended by the pair of transmission shafts 17, 17 to form the rear wheel gearboxes. It reaches the inside of 15, 15 to rotate the rear wheels 5, 5.

As shown in FIG. 2, the hydraulic transmission 9 is provided with a transmission arm 18 which rotates about a vertical axis. When the hydraulic transmission 9 is rotated by pushing and pulling a rod 19, the input from the belt 8 is moved to a central position. It is neutral (stopped), and as it is swung back and forth, the speed is increased in forward and backward directions and output to the transmission belt 10. As shown in FIG. 1, a shift lever 21 is provided near the steering handle 20. As shown in FIG. 3, the shift lever 21 can be moved along a crank-shaped guide groove 22, and the lower end thereof is connected to the rod 19. The speed change lever 21 is neutral in the lateral groove 22b, and when it moves forward in the front groove 22a, the front wheels 4, 4 and the rear wheels 5, 5 gradually rotate in the forward direction to gradually increase speed.
When moving backward in c, the front wheels 4, 4 and the rear wheels 5, 5 reversely rotate and gradually increase in speed. That is, when the gear shift lever 21 of FIG. 1 is pushed forward, the traveling vehicle body 1 starts to move forward, and the forward speed becomes faster as it is pushed. When the transmission lever 21 is pulled backward from that position, the forward speed is reduced,
When it reaches the lateral groove 22b, its forward movement stops and the lateral groove 22b
When the inside is moved to the right and pulled backward, the vehicle body 1 enters the rear groove 22c and starts to move backward. When pulled further backward, the reverse speed increases.

As shown in FIG. 3, a solenoid 23 is provided, and when a current is passed, the pin 23a projects and the rear groove 22c.
When the inlet is closed and the current is cut off, the pin 23a is returned and closed, and then the inlet of the groove 22c is opened. The switch S1 is provided near the rear groove 22c, and when the speed change lever 21 comes to the right end of the lateral groove 22b, the actuator is pushed and turned on. The speed change lever 21
After that, even if it comes to the rear end of the rear groove 22c, the ON state is continued.

As shown in FIG. 1, a column 24 extends upward from a rear portion of the machine frame 7, and tips of a pair of upper and lower links 3 and 3 are rotatably attached. Each link 3, in the vertical frame 25
The rear end of 3 is rotatably attached, and when the links 3 and 3 swing around the rotary shaft of the front end, the vertical frame 25 moves up and down in the same posture. An arm 26 extends downward from the tip of the upper link 3, and a piston rod 27 is connected to this. A lower end of the piston rod 27 projects obliquely upward from a hydraulic cylinder 28 attached to the machine frame 7.

The seedling planting device 2 is provided with a gear box 29 mounted on a vertical frame 25, a seedling mounting table 30 which is obliquely tilted forward and is reciprocally driven to the left and right, and behind the lower end of the seedling mounting table 30. .. and the float that slides on the mud surface B provided under the seedling mounting table 30. This float is composed of a center float 32a in the center and side floats 32b on both sides of the center float 32a. The transmission shaft 33 extends rearward from the right front of the main gear box 11 (Fig. 2), and the rotation thereof drives the seedling mounting table 30 and the seedling planting claws 31, 31 ,.

As shown in FIG. 1, an elevating lever 34 is provided on the left side of the seat 33, and as shown in FIG. 5, its raising operation causes "up", "fixing", "lowering", and "planting" in order from the top. You can select from four positions. As shown in FIG. 4, a valve 36 is provided between the pump 35 and the hydraulic cylinder 28. When the valve 36 is in the neutral position in the figure, oil is trapped in the hydraulic cylinder 28 and the position of the seedling planting device 2 is increased. Is fixed and pushed to the right, the oil discharged from the pump 35 reaches the hydraulic cylinder 28, the piston rod 27 is pushed out, the links 3 and 3 rotate counterclockwise, and the seedling planting apparatus 2 rises. , When pulled to the left, the hydraulic cylinder 28
The oil inside returns to the tank 37, the links 3 and 3 rotate clockwise, and the seedling planting device 2 descends. The elevating lever 34 and the valve 36 are connected by a link or the like, and the left, middle and right of the oil passage of the valve 36 are used in the "up", "fixed" and "down" positions, respectively. And the lifting lever 3
When "4" is set to "planting", a clutch (not shown) is engaged and the transmission shaft 33 transmits the rotation of the engine 6 to the seedling planting device 2.

The center float 32a gliding on the mud surface is
It is designed to swing around the horizontal axis 38 at the rear end,
Its front end is connected to the valve 36 by a link or the like.
When the raising / lowering lever 34 is set to “planting”, the seedling planting device 2 is lowered, the clutch is engaged, and the operation of the seedling planting device 2 is started.
When the center float 32a reaches the mud surface B by the above descent, the valve 36 is returned to the neutral position by pushing up the tip of the center float 32a. Then, when the traveling vehicle body 1 comes to a shallow place on the cultivator, the horizontal axis 38 of the center float 32a goes up above the mud surface B, the tip of the center float 32a goes down, the valve 36 moves to the left, and the seedling planting device 2 moves. Go down. On the contrary, when the traveling vehicle body 1 comes to a deep place in the cultivator, the tip of the center float 32a is pushed up by the mud surface B, the valve 36 moves to the right, and the seedling planting device 2 goes up. In this way, the seedling planting device 2 is held on the mud level basis regardless of the depth of the cultivator, and the uniformity of the transplanting depth of the seedlings is maintained.

As shown in FIG. 1, the discrimination sensor 39 has a machine frame 7
The vehicle body 1 is installed in the vehicle and determines whether the traveling vehicle body 1 is on the paddy field or on the road A. The discrimination sensor 39 shown in the figure is of ultrasonic type. When the traveling vehicle body 1 is in the paddy field, the front wheels 4, 4 and the rear wheels 5, 5 reach the cultivator, and the sound waves emitted from the transmitter 39a are higher than the lower ends of the wheels 4, 5 on the mud surface B. Reflected by the receiver 39b
When the traveling vehicle body 1 is on the road A, the sound wave emitted from the transmitter 39a is reflected on the road A having substantially the same height as the lower ends of the wheels 4 and 5 and returns to the receiver 39b. Based on this time difference, it is determined whether the traveling device 1 is in the paddy field or on the road.

The automatic lifting device X is constructed as follows. As shown in FIG. 5, the pinion 4 rotated by the motor 40
The gear 42 is in mesh with 1. The oblique arm 43 is fixed to the side surface of the gear 42. An arm 44 extends downward from the elevating lever 34, and its lower end and the lower end of the arm 43 are connected by a link 45. The link 45 is provided with a turnbuckle 45a in the middle to adjust the length, and the long hole 45b at the right end of the link 45 has a pin 4 of the arm 44.
4a is engaged. When the gear 42 rotates in the clockwise direction, the arm 43 pulls the arm 44 in the same direction by the link 45, and rotates the elevating lever 34, which was at the "planting" position, to the "up" position. ing. In addition,
When the gear 42 makes one rotation, the motor 40 stops at the position shown in the figure, and the engagement between the elongated hole 45b and the pin 44a causes the lifting lever 3 to move.
4 is kept in the "raised" position. As shown in FIG. 4, the arm 46 extends downward from the lifting lever 34, and
When the link 3 is rotated by a predetermined angle (the seedling planting device 2 is lifted), the lifting lever 34 in the “raised” position is “fixed”.
It is designed to be pulled back to the position.

As shown in FIG. 5, the switch S2 is connected to the arm 43.
The arm 43 is arranged above and is turned on when the upper end of the arm 43 hits, and turned off when the arm 43 is separated during rotation. A cam 48 is fixed to the lower end of the elevating lever 34, and a switch S3 is arranged below it. Then, when the elevating lever 34 is in the "implantation" and "down" positions, the cam 48 hits the switch S3 to be turned on, and in the "fixed" and "up" positions, it is turned off separately. Switch S4 is located above the base of link 3 above and link 3
It turns on when you hit up and turns off when you go down.

As shown in FIG. 6, from the positive terminal to the motor 4
The current is made to flow to the negative terminal via 0 and the relay switch 49. When the discrimination sensor 39 discriminates a paddy field (mud surface B), the electric current that has entered the control device 50 from the positive terminal enters the relay switch 49 through the route C, and the route C1 through the switches S1 and S3 from its coil 49a. Through the relay switch 49a and the path C2 of the switch S2 to the minus terminal.
The current passing through the switch S1 also flows through the switch S4 and the solenoid 23 to the minus terminal.

Further, when the discrimination sensor 39 discriminates the road A, the control device 50 closes the route C so that the flow can flow from the route D to the minus terminal via the solenoid 23 (the automatic lifting device X does not operate). ). Therefore, when the seedling planting machine is in the paddy field, the control device 50 is activated by the signal from the discrimination sensor 39, and the current from the positive terminal is passed through the path C. Here, when the seedling planting device 2 is in operation (the traveling vehicle body 1 is moving forward and the seedling planting device 2 is descending), only the switch S3 is ON and the others are OFF. Here, in order to move the traveling vehicle body 1 backward, the speed change lever 21 is returned to the lateral groove 22b and moved to the right. Then, the switch S1 is turned on, but the pin 23a is projected and the gear shift lever 21 cannot enter the rear groove 22c (it cannot be moved backward). Switch S1 is ON
Then, the coil 49a is activated, the switch 49b is turned on, and the motor 40 is rotated. Then, the gear 42 pulls the link 45, the arm 44 is pulled, and the elevating lever 34 is in the "up" position. Therefore, the valve 36 moves to the right, the oil of the pump 35 flows to the hydraulic cylinder 28, and the link 3,
3 rotates counterclockwise and the seedling planting device 2 rises. Thus, when the seedling planting device 2 reaches a predetermined height, the switch S3 is turned off and the switch S4 is turned on, a current flows through the solenoid 23, the pin 23a is pulled, and the rear groove 2
2c opens. Therefore, the shift lever 21 moves rearward in the rear groove 22c, and the traveling vehicle body 1 moves backward. Even if the gear shift lever 21 is returned to the neutral position and is separated from the switch S1, the switch S2 is ON and the motor 40 continues to rotate. Then, the gear 42 is pushed by the arm 43 at the position of one rotation of FIG. 5 to be turned off, and the rotation is stopped. That is, since the backward movement is started after the seedling planting apparatus 2 is raised, even if the seedling planting apparatus 2 moves the seedling planting machine near the ridge backward, there is no possibility of damaging it.

When the seedling planter is on the road A, the control device 50 is activated by the signal from the discrimination sensor 39, and the current from the positive terminal flows through the solenoid 23 on the path D to the negative terminal. Then, the pin 23a is pulled and the rear groove 22c is opened. That is, when the seedling planter is on the road, the automatic raising device X is deactivated and the speed change lever 21 can freely move in the guide groove 22 to move the seedling planter backward.

As described above, when the seedling planting machine is in the paddy field, the automatic raising device X which automatically raises the seedling planting device 2 when the gear shift lever 21 is operated to the reverse side is operated, and the seedling planting machine is operated. Is on the road, the automatic lifting device X does not operate.
The discrimination sensor 39 may be one that comes into contact with the mud surface or the cultivator. When the discrimination sensor 39 detects a paddy field, the gear shift lever can be prevented from shifting to the road speed side, the differentials of the rear wheels 5 and 5 can be locked, and the operation of the automatic marker can be turned on. .

[Brief description of drawings]

FIG. 1 is a side view of a paddy field working machine to which the present invention is applied.

FIG. 2 is an enlarged plan view of a part thereof.

FIG. 3 is a plan view of part 1 thereof.

FIG. 4 is a layout view of the hydraulic pressure.

FIG. 5 is a layout diagram of the transmission relationship.

FIG. 6 is a wiring diagram thereof.

[Explanation of symbols]

 1 Traveling vehicle 2 Working device (seedling planting device) 21 Speed change lever 34 Elevating lever 39 Discrimination sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideyuki Kusumoto 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture, Engineering Department, Iseki Agricultural Machinery Co., Ltd. Inside (72) Inventor Hiroshi Suzuki, No. 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture

Claims (1)

[Claims] 1. A work device 2 is provided with a lifting lever 34 on a traveling body 1 whose traveling direction is changed back and forth by operating a speed change lever 21.
The paddy work machine is configured so as to be moved up and down by the operation of, and a discrimination sensor 39 for discriminating whether the paddy work machine is in the paddy field or on the road, and the work device 2 when the shift lever 21 is operated to the reverse side. Is equipped with an automatic raising device X that automatically raises, and the discrimination sensor 39 and the automatic raising device X are connected so that the above automatic raising device X does not operate when the paddy working machine is on the road. Paddy working machine.