JPH10127143A - Alighting and boarding step for combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an alighting and boarding step with which safety is improved by avoiding touch with a levee or cereal stalks without forgetting the switching operation of alighting and boarding step in the case of alighting and boarding by providing an interlocking mechanism for letting the alighting and boarding step appear and disappear while being linked with the stopping/ stop canceling operation of a machine body. SOLUTION: An alighting and boarding step 12 to the driving part of a combine harvester is installed so as to freely appear/disappear on the machine body, and an linking mechanism A is provided for letting the alighting/boarding step 12 appear/disappear while being linked with the stopping/stop canceling operation of the machine body. In this case, it is preferable that the stopping/ stop canceling operation of the machine body depends on the operation of a brake pedal 11 or neutral/neutral canceling operation at a traveling speed change gear.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a step for getting on and off a control unit in a combine.

[0002]

2. Description of the Related Art Conventionally, as shown in Japanese Patent Application Laid-Open No. 4-332834, the step of getting on and off the control unit in a combine is provided by fixing the step of getting on and off on the lateral outer side of the body frame.

[0003]

SUMMARY OF THE INVENTION When cutting a culm at the edge of a ridge, the getting on / off step protruding from the aircraft comes into contact with the ridge, so that the culm at the edge of the ridge cannot be cut, and a middle split operation is performed. However, there is an inconvenience that the getting on and off step touches the uncut culm and pushes down the uncut culm, and there is room for improvement. Therefore, as means for solving the above drawback, there is a disadvantage that if the protrusion amount of the getting on / off step is made small, the getting on / off step becomes small and it becomes difficult to get on and off, and the getting on / off step can be rotated around the longitudinal axis of the body. If it is configured to be able to switch between the body storage posture and the body protruding posture, the inconvenience of forgetting the switching operation at the time of getting on and off may occur. . The present invention
An object of the present invention is to eliminate the above-mentioned disadvantages.

[0004]

According to the first aspect of the present invention, a step for getting on and off the control unit in the combine is provided so as to be able to move out and retreat from the aircraft, and is interlocked with a stop / stop release operation of the aircraft. There is provided an interlocking mechanism for moving out of the step of getting on and off. [Operation] According to this configuration, the getting on / off step protrudes in conjunction with the braking operation of the brake or the stopping operation of the body by the neutral operation in the traveling transmission, so that when the vehicle gets off the body, it protrudes largely laterally outward of the body. It is easy to get off via the getting on and off steps. Then, when the vehicle travels by a brake release operation of the brake or a neutral release operation by the traveling transmission, the getting on / off step is stored. Occasionally, the getting on and off steps do not come into contact with uncut culms. [Effect] According to the invention according to claim 1, at the time of mowing at the ridge,
When the getting on / off step touches the ridge, or during the middle splitting work, it is possible to perform a good harvesting work by avoiding the getting on / off step coming into contact with the uncut grain culm, and by using the getting on / off step which can be freely moved in and out. You can get on and off easily. In addition, since the getting-in / out step is moved in and out in conjunction with the stop / stop release operation of the airframe, the step-in / out step switching operation is not forgotten when getting on / off.

According to a second aspect of the present invention, the stop / stop release operation of the body is an operation of a brake pedal. [Operation] According to this configuration, the operation is performed in the same manner as the invention according to the first aspect, and when the vehicle is stopped, the egress and egress of the egress / egress step is interlocked with the operation of the brake pedal which must be absolutely operated. Never forget the leaving operation. [Effect] According to the second aspect of the present invention, the above-described effect of the first aspect of the present invention is provided, and the egress and retraction of the getting on / off step is interlocked with the operation of the brake pedal. As a result, it is possible to surely prevent forgetting the leaving operation of the getting on / off step as compared with the case of performing the operation.

According to a third aspect of the present invention, the stop / stop release operation of the body is a neutral / neutral release operation in a traveling transmission. [Operation] According to this configuration, the invention operates in the same manner as the invention according to the first aspect, and interlocks with the neutral / neutral release operation in the traveling transmission which must be absolutely operated when the getting on / off step is stopped. So you never forget to get out of the boarding step. [Effect] According to the third aspect of the present invention, the above-described effect of the first aspect of the present invention is provided, and at the same time, the egress / retraction of the getting on / off step is interlocked with the neutral / neutral canceling operation in the traveling transmission. As compared with the case where the leaving operation is performed alone, forgetting the leaving operation at the getting on / off step can be surely prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an overall view of a combine, 1 is a pre-cutting treatment device, a raising device 2 for raising lodging grain culms, and a hair clipper for cutting the raised portion of the raised grain culms. It includes a mold reaper 3 and a raking and conveying device 4 for raking and conveying the cut cereal stem backward. Reference numeral 5 denotes a hydrostatic continuously variable transmission that is rotatable in forward and reverse directions, a gear transmission of a traveling transmission case provided on the lower side of the transmission of the hydrostatic continuously variable transmission, and a pair of left and right traveling clutches and brakes. A pair of left and right crawler traveling devices, 6 is a control unit, which independently operates an operation lever 7 that can operate the hydrostatic stepless transmission as a traveling transmission and a clutch and a brake of the pair of left and right crawler traveling devices, respectively. A control box 8 having a pair of left and right side clutch levers that can be operated and a driver's seat 9 are provided. A control floor 10 is provided with a brake pedal 11 that can integrally operate the pair of left and right crawler traveling devices. Reference numeral 12 denotes a step for getting on and off the control unit 6, and a bracket 1 is provided on a laterally outer side of the body frame 13.
4 so as to be rotatable around the longitudinal axis X of the fuselage, and can be switched between the retracted posture and the extended position by rotating around the longitudinal axis X. I have.

The step of getting on and off 12 is linked with the brake pedal 11 and is switched to a protruding posture in accordance with a braking operation by depressing the brake pedal 11, and is brought into a retracted posture in response to a depressing operation of the brake pedal 11. It is configured to be switchable. The interlocking mechanism A between the getting on / off step 12 and the brake pedal 11 is:
Brake pedal 1 depressed about horizontal axis P1
1, a rear extension 11B of the pedal arm 11A,
An extension arm 12B extending from the pivot shaft 12A of the step-in / step-off step 12 so as to face a lower portion of the rear extension 11B of the pedal arm 11A, and the extension arm 12B is connected to the rear extension 11B of the pedal arm 11A. A spring 15 is provided on the rotating shaft 12A of the step 12 so as to contact and bias the step. The step 12 is switched to a protruding position with the depression operation of the brake pedal 11, and the brake The getting-on / off step 12 can be switched to the upper retracted posture by the urging force of the spring 15 in accordance with the depression release operation of the pedal 11.

The brake pedal 11 is configured to be lockable at a depressed position via a lock mechanism 16, and is used as a parking brake by being locked via the lock mechanism 16 at a depressed position. The lock mechanism 16 of the brake pedal 11 includes a lock lever 18 provided on the front surface of the pedal arm 11A and a locking portion 17a of a lever guide groove 17 provided on the front wall of the control box 8. When the brake pedal 11 is used as a parking brake, after the brake pedal 11 is depressed to the brake braking position, the lock lever 18 is operated in the lateral direction to engage the locking portion 17a. To release the lock, when the lock lever 18 is operated in the lateral direction, the engagement with the locking portion 17a is released, and the brake pedal 11 returns upward.

[Alternative Embodiment] In the above-described embodiment, an example has been described in which the extension arm 12B of the entry / exit step 12 is kicked up by the rear extension portion 11B of the brake pedal 11 so that the entry / exit step 12 is projected. In configuring the interlocking mechanism A, as shown in FIGS. 5 and 6, the pivot fulcrum of the step 12 and the method of providing the return spring 15 are devised, and the arm 1 of the step 12 is moved by the pedal arm 11A.
2C may be depressed to cause the getting on / off step 12 to protrude.

As shown in FIG. 7, the step 12 is mounted on the body frame 13 so as to be rotatable about the vertical axis Y. And a protruding posture that protrudes laterally outward of the fuselage.
A is provided with an extension arm 12B protruding into the machine body, and a rear extension 11B of the pedal arm 11A of the brake pedal 11 is extended downward to
The extension arm 1 of the getting on / off step 12 is moved by the downward extension 11B of the pedal arm 11A in accordance with the depression operation of the pedal arm 11A.
By operating 2B, the getting on / off step 12 may be projected laterally outward of the machine body, and may be changed to the machine body storage posture by the return spring 15 in response to the depressing operation of the brake pedal 11. (Note that components having the same functions as those of the above-described embodiment are denoted by the same reference numerals and symbols as those of the embodiment.)

As shown in FIG. 8, the hydraulic circuit of the hydrostatic continuously variable transmission 20 for the crawler traveling device 5 includes:
A shuttle valve 21 for detecting a pressure when the hydrostatic continuously variable transmission 20 is driven forward or reverse is provided, and a pressure switch SW1 operated by pilot pressure from the shuttle valve 21 is provided. A sector gear 23 is provided on the rotating shaft of the step 12 and a forward / reverse electric motor M having a gear for operating the sector gear 22 is provided.
Normally open limit switch S for detecting that
W2 and SW3 are provided, and these detection switches SW1 to S
The electric motor M is driven forward / reverse by operating the motor forward rotation switch SW4 or the motor reverse rotation switch SW5 based on the signal from W3, and the getting on / off step 12 is performed by the neutral / hydrostatic stepless transmission 20. It may be configured to be able to move in and out in conjunction with the neutral release operation. That is, getting on and off step 12
When the detection switch SW1 is turned on by the forward or reverse rotation of the hydrostatic continuously variable transmission 20 in a state where the detection switch SW3 is in the OFF state due to the projecting posture of the detection switch SW3, the forward / backward switch SW4 is operated to get on and off the step 12. Is switched to the retracted posture, and the hydrostatic stepless transmission 20 is operated in a neutral state in a state where the detection switch SW2 is OFF according to the retracted posture of the getting on / off step 12, so that the detection switch S
When W1 is turned off, the reverse switch SW5 is operated to switch the getting on / off step 12 to the protruding posture. (Note that, in this alternative embodiment, the electric motor, the detection switch, and the like that drive the step-in / out step are referred to as an interlocking mechanism A.)

[Brief description of the drawings]

FIG. 1 is an overall side view of a combine.

FIG. 2 is a side view of a control unit.

FIG. 3 is a longitudinal sectional front view showing a switching state of a step of getting on and off;

FIG. 4 is a steering front view showing a locking structure of a lock lever.

FIG. 5 is a side view of the second embodiment.

FIG. 6 is a longitudinal sectional front view of the same.

FIG. 7 is a schematic diagram of a third embodiment.

FIG. 8 is a schematic diagram of a fourth embodiment.

[Explanation of symbols]

 Reference Signs List 6 Control unit 11 Brake pedal 12 Getting on and off steps 20 Travel transmission A Interlocking mechanism

Claims (3)

[Claims] 1. A combine having a step of getting on and off the control unit of the combine so as to be able to move out and back of the aircraft, and an interlocking mechanism for moving the step of getting on and off in conjunction with a stop / stop release operation of the aircraft. Getting on and off steps. 2. The step of stepping on and off the combine according to claim 1, wherein the stop / stop release operation of the body is an operation of a brake pedal. 3. The combine getting on and off step according to claim 1, wherein the stopping / stop releasing operation of the body is a neutral / neutral releasing operation in a traveling transmission.