JP3534459B2 - Agricultural work vehicle - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural work vehicle such as a combine, and more particularly to an attachment structure of a signal check device for determining whether or not a hydraulic mechanism operates normally. About. [0002] Agricultural work vehicles such as combine harvesters are not used throughout the four seasons, but are generally used only during a limited period of time, such as during harvesting. For this reason, these agricultural work vehicles are often not used at all for about one year after they were used in the previous year. For example, the wiring for transmitting and receiving control signals was broken in the middle, and poor contact occurred. Might be Therefore, in use, check whether the hydraulic actuators that operate each operating section operate normally, that is, whether the drive signal is normally sent to the solenoid valve that supplies hydraulic oil to the hydraulic actuators of each section. There is a need to. Conventionally, as an agricultural work vehicle provided with a signal checker for performing such a signal check, a signal checker is conventionally provided under a driver's seat or under a side panel, and a solenoid is determined by whether or not a display lamp is lit. It was checking whether the drive signal was correctly sent to the valve. [0004] However, according to the prior art, since the signal checker is provided below the driver's seat or below the side panel, it is necessary to first check whether the display lamp is lit or not. The operator had to get off the driver's seat once. Then, the user has to reach for the operation panel while standing by the fuselage and check the display lamp while operating the multi-lever and the like, which is extremely troublesome. The present invention has been made to solve such a problem, and an object of the present invention is to provide a display lamp indicating whether or not a hydraulic mechanism normally operates while an operator is sitting in a driver's seat. It is an object of the present invention to provide an agricultural work vehicle that can be visually recognized. In order to achieve this object, the present invention provides a hydraulic pump (42) for supplying or discharging hydraulic oil pumped to a hydraulic actuator (54-60) of each operating section. The solenoid valve (70) that operates and the solenoid valve (7
0) that sends a drive signal to the microcomputer (7)
2) and the solenoid valve (70)
In agriculture work vehicle provided with a signal checker (66) for displaying a display lamp (68) whether a normal driving signal is outputted to the signal checker (66) 及
Fine said solenoid valve (70), the driver's seat (16) step surfaces in the vicinity of a and the driver's seat frame (26) (28)
Provided in the space (63) covered by constituting an openable protective cover (62), by opening the protective cover (62), the operation switch while seated in the driver's seat
The display lamp (68) can be visually recognized while a push operation or an operation lever is operated . The agricultural work vehicle (10) is provided with various manual control devices such as a steering device operated by an operation lever and the like and various automatic control devices such as horizontal control of an airframe. In order to operate these control devices, hydraulic actuators (54 to 60) such as hydraulic cylinders are used. The operation of the hydraulic actuators (54 to 60) is controlled by a microcomputer (72) based on a drive signal from an operation lever or the like.
A drive signal is sent to a specific solenoid valve (70) from the controller, and hydraulic oil is supplied from the solenoid valve (70) to a corresponding hydraulic actuator (54-60). At this time, the solenoid valve (70)
It is possible to know whether or not the drive signal is normally transmitted by checking whether or not the display lamp (68) of the signal checker (66) connected to the wiring to the solenoid valve (70) is on. Has become. That is, if the display lamp (68) is lit, the drive signal is transmitted normally, so that the hydraulic actuators (54 to 60) can be expected to operate normally. It is clear that (54-60) does not work. In addition, in the present invention, the signal checker (66) and the solenoid valve (70) are connected in the vicinity of the driver's seat (16) and the step of the driver's seat frame (26).
Protective cover (62) that can be opened and closed to form a protection surface (28 )
Is provided in the space (63) covered by the operator, the operator operates the operation switch while sitting in the driver's seat (16).
While pressing or operating the operating lever, the protective cover (6
2) can be opened, so that the display lamp (68) can be easily visually recognized. Note that the reference numerals in parentheses described above are for reference to the drawings, and do not limit the configuration of the present invention at all. Preferred embodiments of the present invention will be described below with reference to the drawings. Here, a combine will be described as an example of an agricultural work vehicle. As shown in FIG. 1, the combine 10 has a body 12 supported by a crawler 14, and a driver's seat 16 is arranged in front of one side of the body 12 and a Glen tank 18 is arranged behind the same. Automatic threshing device (not shown) on the side
Is installed. Further, a pre-processing unit 24 including a raising device 20 and a divider 22 is disposed in front of the body 12 so as to be able to move up and down. The driver's seat 16 is the driver's seat frame 2
6, and a step surface 28 is formed on an upper portion of the driver's seat frame 26. A seat 30 is installed at the rear of the driver's seat frame 26, and an operation console 32 is erected above the front portion. The upper surface of the operation console 32 is an operation panel 34. On the operation panel 34, a main shift lever 36 and a mono lever 38 are erected, and various operation switches and meters are provided. A hydraulic lever or the like is provided adjacent to the side of the driver's seat 16. Is disposed on the side operation panel 35 on which the. In the combine 10 having the above-described structure, a drive signal is transmitted manually by operating an operation lever or automatically by operating a switch or the like, and each section is controlled via a hydraulic mechanism. . The hydraulic mechanism is composed of an oil tank, a hydraulic pump, a solenoid valve, a hydraulic cylinder, and the like. The hydraulic oil pumped by the hydraulic pump enters the valve unit, is controlled and sent to the hydraulic mechanism of each part to operate each operating part. It has a structure. The hydraulic mechanism includes a function of moving up and down the entire pre-processing unit of the combine 10, a function of moving up and down the driver's seat, a function of moving up and down the Glen tank, a function of moving up and down the Glen auger, a function of performing stepless shift control,・ It has a function to operate the brake and a function to control the aircraft horizontally. FIG. 2 is a diagram showing a hydraulic circuit for an auger up / down function, a pre-processing lift function, a horizontal control function of an airframe, and the like.
The hydraulic oil in the oil tank 40 is pressure-fed by a hydraulic pump 42, and is supplied to each of the solenoid valves 70-1 to 70-70.
The fluid is supplied to or discharged from the hydraulic cylinders 54 to 60 through -5. This will be described, for example, with regard to automatic horizontal control of the body 12. This function simultaneously raises and lowers the left and right sides of the body 12 while keeping the height of the center of the body constant, and automatically keeps the body 12 horizontal. A tilt sensor (not shown) senses the inclination of the body 12 and sends a signal to a built-in microcomputer (not shown) to operate the left and right horizontal control cylinders 58 and 60. Then, an operating signal is output to the horizontal control solenoid valves 70-4 and 70-5, and hydraulic oil is pumped to the horizontal control cylinders 58 and 60 to raise and lower the left and right sides of the body 12 to move the body 12 Keep horizontal. 3 to 5 show automatic control system diagrams by a microcomputer built in the combine 10. FIG. That is, the combine 10 is connected to the hydraulic cylinder 5
Also provided is an output check function for automatically checking whether a signal is sent to the solenoid valve 70 for controlling 4 to 60. When an input check switch on the operation panel 34 (see FIG. 1) is turned on, an automatic check is performed. The output check mode is set. Then, if the output check is normal, the display lamp of the signal checker 66 (see FIG. 1) is turned on, and if there is a problem, it is turned off. For example, in FIG. 3, the cutting height lamp 68-3 in the signal checker 66 is used if the defective portion is the cutting height lift output portion, and the signal is output if the defective portion is the direction solenoid output portion in FIG. The direction lamp 68-4 in the checker 66 further includes an auger lamp 68-6 in FIG.
Turns off. In the above, the case where a drive signal is automatically transmitted from a switch or the like for checking is described. However, the same applies to a case where each part is controlled via a hydraulic mechanism by a manual operation of an operation lever. Here, in the present invention, the signal checker is provided near the driver's seat and in a space covered with a protective cover that can be opened and closed, and the indicator lamp can be visually recognized in a seated state by opening the protective cover. It is characterized by. That is, in FIGS. 6 and 7, the protective cover 62 is provided on the step surface 28 of the driver's seat frame 26, and the protective cover 62 can be opened and closed forward and backward about a hinge shaft 64 extending left and right. I have. The protective cover 62 has sufficient strength to support the weight of the operator, and is provided at a position where the operator can easily open and close the seat by slightly moving his / her foot while sitting in the driver's seat 16. A signal checker 66 is provided in a space 63 covered by the protective cover 62. In the present embodiment, the signal checker 66 is provided in the space 63.
The solenoid valve 70 and the microcomputer 72
Are arranged close to each other. The solenoid valve 70 is connected to a pipe 76 via a connector 74. The signal checker 66 includes a display lamp 68
And a drive circuit therefor. The drive signal from the operation lever is provided in the middle of a signal transmission circuit connecting the microcomputer 72 and the solenoid valve 70 depending on whether the display lamp 68 is on or off. It can be checked whether or not the power is transmitted to the solenoid valve 70 normally through the.
Note that a light emitting diode (LE) is used instead of the display lamp 68.
D) may be used. Next, the operation of this embodiment will be described. Prior to the operation of the combine 10, the operator sits on the driver's seat 16 and operates the operation lever in order to check whether or not the hydraulic mechanism of each operating section operates normally. Then, the microcomputer 72 is operated from the operation lever.
A drive signal is sent to a solenoid valve 70 of a specific hydraulic mechanism through the corresponding hydraulic cylinder 5.
4 to 60 are activated. However, when the drive signal is not transmitted to the solenoid valve 70 due to a disconnection or the like, the hydraulic cylinders 54 to 60 do not operate. At this time, whether or not the drive signal is transmitted normally can be known by the signal checker 66.
8 is turned on, otherwise it is turned off. Accordingly, the operator operates the operation lever while operating the signal checker 66.
The operator only needs to pay close attention to the display lamp 68, and furthermore, the operator opens the protective cover 62 while sitting in the driver's seat,
The above monitoring can be performed. In this way, it is possible to easily check whether the drive signal is correctly sent to the solenoid valve 70 of each operating section. As described above, according to the present invention, the protection cover is opened while the operator operates the operation lever or the like of the operation panel while sitting on the driver's seat, and the signal checker display lamp is displayed. Can be easily visually recognized .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view of a combine. FIG. 2 is a diagram showing a hydraulic circuit of a hydraulic mechanism. FIG. 3 is a diagram showing an automatic control system by a microcomputer. FIG. 4 is a diagram showing an automatic control system by a microcomputer. FIG. 5 is a diagram showing an automatic control system by a microcomputer. FIG. 6 is a plan view showing an attached state of the signal checker. FIG. 7 is a front view of FIG. 6; [Description of Signs] 10 Combine 12 Airframe 16 Driver's seat 20 Cutting clutch 24 Preprocessing unit 26 Driver's seat frame 28 Step surface 30 Seat 32 Operation table 34 Operation panel 35 Operation panel 42 Hydraulic pump 54-60 Hydraulic cylinder 62 Protective cover 63 Space 64 Hinge shaft 66 Signal checker 68 Indicator lamp 70 Solenoid valve 72 Microcomputer 74 Connector 76 Piping

Claims (1)

Claims: 1. A solenoid valve for supplying or discharging hydraulic oil pumped by a hydraulic pump to or from a hydraulic actuator of each operating unit, and the solenoid valve based on a signal for operating each operating unit. And a microcomputer for sending a drive signal to the agricultural work vehicle, and a signal checker for displaying, by a display lamp, whether or not the drive signal is normally output to the solenoid valve, wherein the signal checker and the solenoid A valve is provided near the driver's seat and in a space covered by an openable and closable protective cover that forms a step surface of the driver's seat frame , and the protective cover is opened to seat the driver's seat. so
While pressing the operation switch or operating the operation lever,
Agricultural work vehicle, characterized in that it was visible the serial display lamp.