JPH0923736A - Operating lever locking device of combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a reaping part from lifting and lowering when an operator pushes down a driving operation panel forward, alights from a machine body and performs the steering and operations in a combine harvester, capable of turning over a driving operation column provided on a step in an operating part in front and rear at an optional angle and equipped with one operating lever capable of performing lifting and lowering and steering of the reaping part on the driving operation column. SOLUTION: This operating lever locking device of a combine harvester is obtained by installing a sensor 9 for sensing the overturn of a driving operation column to the vicinity of the front in a rotating part thereof and further arranging a locking means comprising a solenoid 10 and a locking metallic fixture 12 in a rotation base of an operating lever 7 and composed so as to enable the steering operations but disable the lifting and lowering operations by operating the solenoid 10 when sensing the overturn of a driving operation column with the sensor 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a position fixing mechanism for an operating lever of a combine.

[0002]

2. Description of the Related Art Conventionally, a driving operation column is provided in front of a combine seat, and one operating lever is projected on the driving operation column. With this one operating lever, vertical movement of a mowing section, turning, and alignment are performed. A technique capable of finely adjusting is known. In addition, the driving operation column can be tilted in the front-back direction so that it can be adjusted to the body shape and driving posture of the worker, and the combine can be placed on the platform of the truck and lowered, and the steep mountain roads with narrow mountainous areas. There is also a known combine harvester that tilts the driving operation column to the maximum forward so that it can be operated to steer when the vehicle is steered and steered. . In addition, an elbow rest that is also used as a handle is provided from the driving operation column, and when this armrest is in the non-acting posture state, the operating lever is locked, and when the armrest is pulled out, the operating lever is unlocked. State,
A technique in which this can be switched is also known. For example, it is a technique disclosed in Japanese Utility Model Laid-Open No. 63-66437.

[0003]

However, in the conventional structure as described above, when the operator descends and performs a steering operation with the driving operation column tilted forward, the operator walks while walking. Since the operation lever is operated, the position of the hand of lever operation is not stable, so not only the steering operation by the left and right rotation operation but also the up and down rotation are performed at the same time.
There was a problem that the mowing part moved up and down and the mowing part collided with the ground.

[0004]

The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described. That is, in a combine in which a driving operation column provided on the step of the operating section can be tilted forward and backward at an arbitrary angle and one operating lever for raising and lowering and steering the cutting section is provided on the driving operation column. A sensor for detecting that the driving operation column is tilted to the frontmost position is provided, and the operation lever is provided with locking means for interlocking with the sensor and for restricting the raising and lowering of the mowing section.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. FIG. 1 is a right side view of the combine, FIG. 2 is a left side view of the combine, and FIG. 3 is a schematic view showing a fixing mechanism for vertically moving the cutting unit according to the present invention.

Overall Structure of Combine Fig. 1 and Fig. 2
More will be described. The chassis 1 is arranged on a crawler traveling device that supports the left and right crawlers 31, 31 and an operation portion A is arranged in front of the chassis 1 on the upper right side thereof. The operation section A is provided with a step 2 on the front part of the chassis 1, a driving operation column 3 is provided in the front part of the step 2, and immediately after the step 2, a seat base 4 which covers the engine E and serves also as an engine room is provided. It is erected and the seat 5 is mounted on it. Further, a fried grain conveyor 28 is arranged in the vertical direction at the rear part of the seat base 4, and the upper end part thereof is provided with a grain tank 29.
And a lower part of the Glen tank 29 is a paddy storage unit 30 on which a paddy bag is placed.
It is possible to store the more loose rice in a rice bag.

On the chassis 1, on the left side, a threshing section C in which a handling cylinder 37, a feed chain 36 and the like are provided in the upper part
In the lower part, a sorting section D having a sorting device such as a Kara-mino fan and a swing sorting device is provided. Further, in front of the threshing / sorting sections C / D and in front of the chassis 1, a mission case M for suspending the drive wheels 31a / 31a of the left and right crawlers 31/31 is arranged, and further in front of it,
A mowing unit B for arranging the raising device 32, the cutting blade 33, the grain culm transporting devices 34, 35, and the like cuts the root of the grain culm and conveys the grain culm to the feed chain 36 of the threshing unit C while keeping the grain culm horizontal. It is supported. As shown in FIG. 2, the mowing section B is supported by a lifting cylinder 46 projecting forward of the chassis 1 so as to be lifted and lowered. In the threshing section C, the handling barrel 37 threshes the grain culms conveyed on the feed chain 36, and the rice grains falling from the threshing portion C are sorted in the sorting section D and the paddy is fed to the fried grain conveyor 28. It is stored in the Glen tank 29.

In the combine of this embodiment, as shown in FIG. 1, a column support frame 15 is provided on the front part of the step 2, and the lower part of the operation column 3 in the operation section A is rotated by the column support frame 15. The driving operation column 3 is pivotally stopped by a moving shaft 3b, and the driving operation column 3 is rotatable in the front-rear direction. The operation lever 7, the main shift lever 13, the tachometer, the accelerator lever, and the like, which can finely adjust the up and down, turning, and alignment of the mowing section, are arranged on the operation column 3. It is set up. The operation lever 7 can be finely adjusted by intermittently adjusting a side clutch by tilting a switch operated by a finger provided at an upper end portion to the left and right, and by rotating the operation lever 7 to the left and right, The clutch is operated to allow the crawler to turn to the side where the driving force is cut off, and the operating lever 7 is turned back and forth to extend and retract the elevating cylinder 46 to elevate the mowing section B. .

Next, the tilt lock mechanism of the combine harvester of the present invention will be described. As shown in FIGS. 1 and 3, a circular arc-shaped elongated hole 15a centering on the rotation shaft 3b is opened on the side surface of the column support frame 15, and the elongated hole 15a is formed.
The bolt portion 8a of the angle adjusting knob 8 is inserted into a and is screwed to the side surface of the operation column 3, and by tightening the angle adjusting knob 8, the operation column 3 is tilted at an arbitrary angle in the elongated hole 15a. Can be fixed.

The switch 9 is fixed to the column support frame 15 as a sensor so that the contact 9a of the switch 9 faces the front position of the slot 15a. The switch 9 serves as a battery 11 and an actuator in this embodiment. Then, it is connected to the solenoid 10. The solenoid 1
A lock fitting 12 is fixedly provided at the tip of the sliding shaft 10a of No. 0 as a locking means, and the lock fitting 12 is U-shaped so that the operation lever 7 can be fitted into the recess 12a. However, the sensor is not limited to the switch, and may be a position detection sensor such as a proximity switch or an optical sensor, and an electric cylinder or a hydraulic cylinder may be used instead of the solenoid. Further, the mounting position of the sensor is not limited to the long hole, and may be any position as long as it can be detected that the driving operation column 3 has been rotated to the frontmost position. The sliding shaft 10a of the solenoid 10 is arranged in the left-right direction so that the tip of the recess 12a fits the operation lever 7 in the excited state and is completely separated from the operation lever 7 in the non-excited state. doing.

With this structure, the angle adjusting knob 8 is loosened, the driving operation column 3 is tilted back and forth by sliding in the elongated hole 15a, and the angle adjusting knob 8 is adjusted according to the driving posture. By tightening and fixing, you will be released from a cramped posture during work. Then, when the operator descends from the operation section A and carries out the steering operation, the angle adjusting knob 8 is loosened, and the driving operation column 3 is tilted and fixed to the vicinity of the forefront side, so that the bolt portion 8a comes into contact with the contact 9a of the switch 9. Then, the switch 9 is turned on, the solenoid 10 is operated, and the tip end of the recess 12a of the lock fitting 12 is fitted into the operation lever 7.
When the operating lever 7 is operated in this state, the lock fitting 12
As a result, the operating lever 7 cannot be tilted in the front-back direction, the mowing section B does not move up and down, and the operating lever 7 can be rotated only in the left-right direction for steering operation.

[0012]

The present invention is configured as described above.
The following effects are obtained. That is, the operation lever that enables the steering and lifting operations is not locked when the driving operation column 3 is slightly tilted according to the body shape and the driving posture. Only when 3 is tilted to the frontmost position, the raising and lowering operation of the mowing section B is locked, and the mowing section B does not descend when performing the steering operation while walking down and damaging the mowing section. And does not interfere with walking.

[Brief description of drawings]

FIG. 1 is a right side view of a combine.

FIG. 2 is a left side view of the same.

FIG. 3 is a schematic view showing a fixing mechanism for vertically moving the cutting unit according to the present invention.

[Explanation of symbols]

 A Operation part B Mowing part 3 Operation column 3a Long hole 7 Operating lever 8 Angle adjustment knob 8a Bolt part 9 Switch 9a Contact point 10 Solenoid 10a Sliding shaft 12 Lock metal fittings 46 Lifting cylinder

Claims (1)

[Claims] 1. A driving operation column provided on a step of an operating section can be tilted forward and backward at an arbitrary angle, and one operating lever for raising and lowering and steering a reaping section is provided on the driving operation column. In the combine harvester, a sensor is provided for detecting that the driving operation column is tilted to the frontmost vicinity, and the operation lever is provided with locking means for interlocking with the sensor and for restricting the raising and lowering of the cutting section. A control lever lock device for combine harvesters.