JPH064672Y2 - Travel control device for work vehicle - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial field of application The present invention relates to a traveling control device for a working vehicle such as a combine harvester and a harvester, and more specifically, to enable safe operation of the aircraft while away from the driver's seat. The present invention relates to a travel control device.

(B) Conventional Technology Conventionally, a working vehicle, for example, a combine, cuts a grain rod that has been planted in a field by operating a cutting blade and traveling while appropriately raising and lowering a pretreatment unit. Further, even after the mowing work is finished, the pillow culms that have been mowed are left unthrushed in the headland part at the corner of the field, and the mowing part also falls or falls off the cutting blade. Grains may be left behind little by little due to reasons such as the above. Then, in order to process these unthreshed grain culms and uncut grain culms, the operator, while keeping the automatic threshing device in operation, temporarily stops the operation of the combine and descends from the driver's seat to leave the uncut grain remaining in the field. The grain culms are collected by hand cutting and manually put into the opening of the threshing device where the feed chain is located for threshing work.

However, the above-mentioned conventional combine, when threshing the grain culm collected from the field in the state of being stopped at the same place, the straw by the work is discharged to the same place by the cutter or knotter, so it is as it is. If the work is continued, the straw will be raised and a problem will occur in which the straw outlet of the cutter or the notter is clogged. Furthermore, if straw piles are made in several places in the field by this method, not only the appearance is bad but also the composting of straw is bad. Further, in order to carry the grain culms in the distant headland portion to the combine portion, the operator is forced to carry out a heavy labor and the efficiency is lowered.
For this reason, the operator occasionally interrupts the manual handling work to remove the straw accumulated under the cutter or knotter,
It is necessary to return to the driver's seat and move the aircraft to another place to continue the manual handling work. Especially when the number of operators is one or a small number, the manual handling work and the driving must be repeated. Not only that, it causes heavy labor to increase the burden on the operator, and there is also a risk that the operator may be less careful and get caught in the feed chain.

Therefore, by operating the operating means provided on the fuselage from outside the fuselage, the combine can be moved forward or backward at a preset speed so that the fuselage can be moved while in the field without returning to the driver's seat. The present applicant has proposed a travel control device configured as described above.

(C) Problems to be solved by the invention However, in the traveling control device proposed by the applicant of the present invention, the operating means has a non-momentary switch that maintains the same state even after the operator releases his / her hand. When the operator operates the operating means and is operating in parallel with the combine, if the operator looks away from the aircraft or falls and leaves the aircraft, the combine will travel to an unexpected location. , There is a risk that it may lead to personal injury.

(D) Means for Solving the Problems The present invention is intended to solve the above problems, and for example, as shown in FIG. In the working vehicle 1 including the step-variable shift lever 13 and the actuator 32 for operating the continuously variable transmission 31 and the shift position detecting means 37 for detecting the shift position, the work vehicle 1 is provided at a position different from the driver's seat 10 of the machine body 3. The traveling operation means 19 is installed, the traveling operation means 19 is composed of a momentary switch, and the actuator 32 is operated by a signal from the control section 21 based on the pressing operation of the operation means 19 to operate the continuously variable transmission 31.
Is configured to operate at a set speed.

(E) Operation Based on the above-described configuration, when performing manual handling work such as collecting and threshing grain culms left uncut in the field by hand cutting, the operator stops the work vehicle 1 at an appropriate work position, and continuously The speed change lever 13 is set in the forward drive range F (or the reverse drive range R) at the neutral position N and the driver's seat 10 is separated. In this state, the operator starts the manual handling work, and when the work is completed, or when the straw is piled up below the straw exit 18 (see FIG. 4) of the automatic threshing device 6, the work vehicle In order to move 1 to another work position, the traveling operation means 19 is operated and the manual traveling switch 15 is operated. Then,
The actuator 32 is operated by a signal from the control unit 21 based on the operation of the traveling operation means 19 to drive the continuously variable transmission 31 at a set speed, and the working vehicle 1 moves forward or backward at a predetermined set speed. Then, it is moved to the next work position. At this time, since the traveling operation means 19 is a momentary switch, the operator is walking with the working vehicle 1 while pressing the operation means 19, and when an emergency occurs, simply release the hand from the operation means 19 and immediately drive the vehicle 1. Can stop running. Then, the working vehicle 1 is stopped at an appropriate work position when the operator releases the hand from the traveling operation means 19, and the manual handling work is restarted at the position.

(F) Embodiment An embodiment according to the present invention will be described below with reference to the drawings.

As shown in FIGS. 3 and 4, the combine 1 has a machine body 3 supported by crawlers 2, and the machine body 3 is provided with a feed chain 5 on one side thereof. 6 are arranged. Further, in front of the machine body 3, a pretreatment section 7 is arranged so as to be able to move up and down, and a narrow guide 9 is installed on the side of the pretreatment section 7 so as to be able to rise and fall.
A driver's seat 10 is arranged on the other side of the machine body 3, an operation console 11 is arranged in front of the driver's seat 10, and a crank-shaped lever groove is provided on an operation panel 12 provided on the side thereof. 12a is formed, and a continuously variable transmission lever 13 is swingably installed in the lever groove 12a. In addition, on the front side of the automatic threshing device 6, a hand-operated traveling switch 15 including a momentary switch, and in some cases, an operation switch system 19 including a leftward correction switch 16 and a rightward correction switch 17 are installed. (First
See figure). In addition, what is shown by 18 in the figure is a straw mouth.

On the other hand, as shown in FIG. 1, the shift position by the continuously variable transmission lever 13 is detected by the potentiometer 20, and the detected value is input to the microcomputer 21 (hereinafter referred to as a microcomputer). Further, in the mission case 22 installed in the machine body 3, side clutch solenoids 26 and 27 for switching the left and right side clutches 23 and 25 are output from the microcomputer 21 to turn on and off, respectively, and the left and right side clutches 23 are output. , 25 are connected and disconnected as appropriate. In addition, the drive side split pulley 29
The driven side split pulley 30 constitutes a continuously variable transmission 31, and the hydraulic actuator 32 including a double-acting cylinder that changes the width of the drive side split pulley 29 is installed. Furthermore, an operation signal is sent from the hand-operated traveling switch 15 (the left direction correction switch 16 and the right direction correction switch 17) of the operation switch system 19 to the microcomputer 21 at the time of the operation. The signal from the handling switch 15 is input to the setting means 33 provided in the microcomputer 21 and sent to the comparing means 35 also provided in the microcomputer 21. Further, the piston rod 36 of the hydraulic actuator 32 is connected to a potentiometer 37 for detecting the expansion / contraction position of the piston rod 36, and the value detected by the potentiometer 37 is the comparing means 3
5 is input. Then, the setting means 33 sends a setting signal for causing the machine body 3 to travel at a low set speed to the comparing means 35, and when the solenoid valve 39 is operated by this, the piston rod 3
Expansion / contraction of 6 is detected by the potentiometer 37 and input to the comparison means 35. Then, the detected value and the setting means 3
3 is compared with the setting signal from the control unit 35, and as a result, the actuator 32 is further extended, contracted, or stopped, so that the continuously variable transmission 31 is brought to the shift position corresponding to the setting signal. Has been done. In addition, a crank-shaped lever groove 12 formed on the steering panel 12
a is defined as a forward drive range F on one side and a reverse drive range R on the other side,
Further, an intermediate portion where the forward travel region F and the reverse travel region R are connected is set to a neutral position N, and at the neutral position N, the lever 13 is swung in the lateral direction of the machine body to move to the forward travel region F side or the reverse travel region R. When it is switched to the side, the hand-operated traveling switch 1
When 5 is pressed, the continuously variable transmission 31 is operated to a preset low speed while the main clutch 40 is connected by the above-described action, and the combine 1 is moved forward or backward at a low speed. . Furthermore, each of these switches 15,
Since 16 and 17 are composed of momentary switches, they are connected only while the operator is pressing them with their hands, and the switches are immediately disconnected when their hands are released. In addition, what is shown by 41 and 42 in the figure is an engine and a counter case, respectively.

In addition, V of the continuously variable transmission lever 13 in the reverse range R
9 to V9 in the forward drive range F, the entire range from the neutral position N to the V in the forward drive range F or the reverse drive range R
The potentiometer 20 is configured to detect the positive and negative values of the respective values. Further, the cylinder stroke of the hydraulic actuator 32 is detected by the potentiometer 37. However, by setting a set value at the position for operating the continuously variable transmission 31 at a low speed of the cylinder stroke, the continuously variable transmission lever can be set. The cylinder stroke rises straight when operated by 13, but when operated by the hand running switch 15,
The actuator 32 is configured so as to stop rising at the position where the set value is set and stop the actuator 32 in order to maintain the state.

Since the present embodiment is configured as described above, in the field where the harvesting work by the combine 1 has been completed, the operator does not perform the manual handling work for manually threshing the uncut uncut grain culms. The machine 3 is stopped in a state where the automatic threshing device 6 is operated in the vicinity of the cut stalks being planted, and the continuously variable transmission lever 13 is moved to the forward range F in the neutral position N.
Set to the side (or the reverse range R side) and move away from the driver's seat 10 (S1). Then, the operator cuts and collects the uncut grain culms around the machine body 3, further sequentially inserts the grain culms through the opening 6a of the automatic threshing device 6, and performs the threshing work. At the time when the straw becomes too bulged below the straw mouth 18, the operator interrupts the manual operation,
The manual traveling switch 15 of the operation switch system 19 is pressed and operated (S2). Then, the signal sent from the switch 15 is input to the setting means 33 (S3), whereby the setting means 33 outputs the setting signal for causing the airframe 3 to travel at the set low speed. . Then, a signal is output from the comparison means 35 to the solenoid valve 39 based on the setting signal, and the valve 39 is operated to operate the hydraulic actuator 32. Thereby, the expansion / contraction of the piston rod 36 is detected by the potentiometer 37, and when the detected value is input to the comparison means 35, the setting signal and the detected value are compared by the comparison means 35 (S4). When the detected value is larger than the set value of the set signal, the hydraulic actuator 32 is contracted and decelerated so as to approach the set speed (S5), and when the detected value is smaller than the set value of the set signal, the actuator 32 is expanded. The speed is increased to approach the set speed (S6). Furthermore,
When the detected value and the set value are equal, the actuator 32 is immediately stopped and its speed is maintained. Therefore,
The combine 1 travels at the set low speed, and when the operator reaches the next work position, the combine 1 is stopped by removing the hand from the hand-operated travel switch 15 and performing a cutting operation. Then, the manual handling work is started again at the position. While traveling at the set speed of the combine, the direction correction of the machine body 3 can be performed by operating the left direction correction switch 16 and the right direction correction switch 17 arranged in the operation switch system 19. Since 16, 17 and the hand-operated traveling switch 15 are each composed of a momentary switch, the continuously variable transmission 31 or the like is operated only while the operator is pressing the hand, and the transmission 31 is immediately operated when the operator releases the hand. Since it is possible to stop the operations such as the above, it is possible to prevent a problem such as the combine 1 traveling in an unexpected direction when the operator takes his eyes off.

In the present embodiment, when the operator tries to operate the operation switch system 19 away from the driver's seat 10, it is determined whether the continuously variable transmission lever 13 is set to the forward drive range F side or the reverse drive range R side. I relied on my own memory, but in Figure 5 (a),
As shown in (b), the forward side detection switch is provided on both sides of the rotation direction of the arm 43 that rotates in order to switch the forward / reverse switching section in the mission case 22 in accordance with the swing operation of the continuously variable transmission lever 13. 45 and the reverse side detection switch 46 are installed, respectively, and the operation switch system 19 ′ is provided with the forward side indicator light 47 and the reverse side indicator light 49 so that the operator can move the continuously variable transmission lever 13 to the forward range F side and the reverse range. When set to either the R side, one of the indicator lights 47 and 49 is turned on corresponding to the set position of the speed change lever 13, and when operating the machine body 3 by the operation switch system 19 ', a stepless operation is performed. It is configured to provide further safety by reconfirming which side of the forward / reverse drive range F or R the shift lever is set to, so that a reliable operation can be performed without misunderstanding. Even There.

(B) Effect of the Invention As described above, according to the present invention, the traveling operation means 19 including a momentary switch is installed at a position different from the driver's seat 10, and the control unit based on the pressing operation of the traveling operation means 19 is installed. Since the actuator 32 is operated by the signal from 21 to operate the continuously variable transmission 31 at the set speed, the working vehicle 1 is operated at the set speed only while the traveling operation means 19 is being pressed. When traveling and in an emergency, the vehicle 1 can be easily stopped by releasing the hand from the traveling operation means 19, so that even when the operator looks away from the machine body 3 or falls down and separates from the machine body 3. , The vehicle 1 can be immediately stopped, and the trouble such as the vehicle 1 traveling to an unexpected place and causing a danger can be surely prevented, so that the working vehicle 1 is provided with extremely high reliability and safety. thing You can

Further, when the traveling operation means 19 is provided with forward / reverse indicator lights 47, 49 for identifying the set position of the continuously variable transmission lever 13, even if the vehicle is separated from the driver's seat 10, the continuously variable transmission lever 13 is set in the forward movement range. It is possible to operate the traveling operation means 19 by reconfirming whether the vehicle is on the F side or the reverse traveling area R side, whereby the working vehicle 1 travels in an unintended direction due to misunderstanding of the operator, and travels. The safety of the control device can be further enhanced.

[Brief description of drawings]

FIG. 1 is a system configuration diagram according to the present invention, FIG. 2 is a flow chart showing the operation thereof, FIG. 3 is a plan view showing the whole combine, FIG. 4 is a side view thereof, and FIG. FIG. 11 is a perspective view showing another embodiment in which a front / reverse side detection switch is provided on the R continuously variable transmission lever 13. And FIG. 5 (b) is a front view showing the forward / reverse traveling indicator lamps for displaying the detection by the forward / reverse traveling side detection switch. 1 ... Work vehicle (combining), 3 ... Airframe, 10 ... Driver's seat, 13 ... Continuously variable lever, 19 ... Traveling operation means (operation switch system), 20 ... Lever position detecting means (potentiometer) , 21 ... control means (microcomputer), 31 ... continuously variable transmission, 32 ... actuator (hydraulic actuator), 37 ... shift position detecting means (potentiometer).

Claims (2)

[Scope of utility model registration request] 1. A continuously variable transmission lever installed in a driver's seat, a continuously variable transmission, an actuator for operating the continuously variable transmission, and a lever position detecting means for detecting an operation position of the continuously variable transmission lever. And a shift position detecting means for detecting the operation position of the actuator, and the value of the shift position detecting means is based on the operation of the continuously variable shift lever,
In a working vehicle in which the actuator is operated so as to correspond to a signal value from the lever position detection means, a traveling operation means which is arranged at a position different from the driver's seat and includes a momentary switch, and a pressing force of the traveling operation means. Based on the operation, the actuator is operated so that the value of the shift position detecting means corresponds to a preset value, and the actuator is stopped to stop the continuously variable transmission based on the depression of the traveling operation means. A travel control device for a working vehicle, comprising: a control means for controlling the vehicle to return to a position. 2. The traveling control device according to claim 1, wherein the traveling operation means has a forward / reverse traveling indicator light for identifying a set position of the continuously variable transmission lever.