JPS5834988Y2 - Reaper with cutting height control device - Google Patents

Description

[Detailed description of the invention] This invention automates the cutting height adjustment during reaping work, and a ground-contact sensor for controlling the cutting height is attached to the cutting section, which is connected to the machine so that it can be raised and lowered. Regarding the reaper.

In this type of reaper with a cutting height control device, if the cutting height control sensor is in the ground contact position even when the machine is turning or driving on the road, even if the VC button is pressed, this sensor may come into contact with other objects such as stones or ridges. Since there is a risk of deformation and damage due to collision, it is necessary to store the sensor in the reaping section when the aircraft turns or runs on the road.As a prior art related to such storage, Japanese Patent Application Laid-Open No. 52-47421 discloses the sensor. There is a reaping section lifting device.

In this method, the artificial lifting control lever of the reaping section and the sled body for detecting the height above the ground are connected with a Bowden wire, and when the lifting control lever is manually operated to raise, the sled body is retracted by the manual operation force. However, since the lift lever was linked to move the user up and down, there were drawbacks such as the manual lifting/lowering operation lever was difficult to operate and lacked smooth operation.

The purpose of this invention is to switch the cutting height control sensor between the ground contact posture and the ground non-contact retracted posture as described above by effectively utilizing the upward movement of the reaping section that is pressed when the machine turns or when driving on the road. To provide a reaper with a height control device that allows easy cutting.

The technical means taken by the present invention is to connect a fixed part on the machine side and a protruding piece that contacts and presses the operated piece when the operated piece and the reaping part are upwardly displaced above a certain level. The sensor and the operated piece are interlocked and connected via a wire, and the sensor is automatically retracted into a non-contact storage position with respect to the ground in conjunction with the upward displacement of the reaping section above a certain level. The present invention has a certain point in that it constitutes an interlocking mechanism that switches automatically and reversibly, and has the following effects.

According to the present invention, by simply lifting the reaping section, which is an essential contact operation when turning the aircraft or driving on the road, the sensor can be moved in a non-contact manner to the ground in conjunction with the upward displacement of the reaping section above a certain level. Since the sensor can be automatically and reversibly switched to the retracted position, there is no need to forget to switch the sensor position, and the sensor can be switched to the retracted position by mechanical force by effectively utilizing the rising movement of the reaping section. Therefore, the lift operation lever has the advantage of being easy to operate, so that the operator does not feel fatigued, and the switching is reliable.

Hereinafter, embodiments of the present invention will be described based on the drawings.

Fig. 1 shows a combine harvester, which is an example of a reaping machine, in which a threshing device 1 is mounted in front of the machine 2, a pulling device 3A, a clipper-type reaping device 3B, and a husk harvested in a standing position. The reaping section 3, which consists of a vertical conveyor device 3C, etc., which is changed to a sideways posture while conveying and feeding the threshing feed chain to one person, is moved around the horizontal axis 3 of the rear end of the reaping frame 3D that supports the reaping section 3. A control section 4 that is movable up and down and is located between the pulling device 3A and the threshing device 1 and on the lateral side of the vertical conveyance device 3C has a control section 4 that can be moved up and down manually to drive the reaping section 3 up and down. A single operation lever 6 is provided which can be switched between one state and a second state in which the mowing section 3 is automatically driven up and down based on the detection result of a ground contact type cutting height control sensor 5, and A mechanism 7 is provided which automatically and reversibly switches the sensor 5 to a non-contact storage position with respect to the ground in conjunction with an upward displacement of the reaping section 3 above a certain level.

A control mechanism for driving the reaping section 3 up and down by manual operation is constructed as shown in FIG. 2.

That is, a setting signal from a setting device 8 configured so that the output voltage changes according to the position setting of the operating lever 6, and a signal from a level detector 14 configured so that the output voltage changes depending on the attitude change of the reaping frame 3D. is input to the comparator 9, and the difference signal from the comparator 9 is input to the discriminators 10A and 10B for raising and lowering, which determine whether the reaping section 3 should be raised or lowered. , a control pulp 12 that controls the operation of a hydraulic cylinder 11 that drives the reaping section 3 up and down around the horizontal axis 3, and amplifiers 13A and 13 for both row separators IOA and 10B.
The reaping section 3 is operated in response to a command signal from one of the discriminators 10A or 10B to switch the control pulp 12 and detect the setting signal from the setting device 8 and level detection. The configuration is such that the detection signal from the detector 14 is raised or lowered to a state where they become equal to each other.

Further, a control mechanism for automatically raising and lowering the reaping section 3 based on the detection result of the sensor 5 is configured as follows.

That is, a first switch SW1 detects that the ground contact 5a of the sensor 5 is oscillated upward by a certain amount or more, and a second switch 5Xiv2 is used to detect that the ground contact 5a is oscillated downward by a certain amount or more. The detection signals from these rain detection switches SW1 and SW2 are sent to the control pulp 1 via amplifiers 15A and 15B.
2, and accordingly, when the first switch SW1 is activated, a rising signal is output to the pulp 12 to drive and raise the reaping section 3, and when the second switch SW2 is activated, It is configured to output a descending signal to the pulp 12 to drive the reaping section 3 downward.

Further, at the connection point between the manual control circuit and the automatic control circuit, the operating lever 6 is located in a linear manual operation guide groove P1 formed in the operation guide plate 16, or
A third switch S detects whether the switch S is located in an automatic operation guide groove P2 in a direction perpendicular to the manual operation guide groove P1 and automatically switches between a manual control state and an automatic control state.
W3 is provided.

Further, the operating lever 6 is configured to be held at a desired operating position by a friction mechanism (not shown) provided at its swing fulcrum or in the middle of its operating system.

The interlocking mechanism I is constructed as follows.

That is, the sensor box 5A of the cutting height control sensor 5 is attached to the vertical shaft portion of the fixed frame 7A provided on the grass cutting support rod 3E of the cutting section 3 so as to be slidable in the vertical direction, and the sensor box 5A and the fixed frame A spring 7B is interposed between the sensor box 7A and the ground contact 5a to move and bias the entire sensor box 5A downward. The operated piece 7D and the sensor box 5A are interlocked and connected via a wire 7E, so that the sensor 5 is moved from the ground contacting posture in conjunction with the vertical displacement of the reaping section 3 above a certain level. Automatically and reversibly into a non-contact storage position with respect to the ground, which is retracted above the weeding support rod 3E against the elastic urging force of the spring 7B, or from this non-contact storage position with the working position with contact with the ground. It is configured to switch.

[Brief explanation of the drawing]

The drawings show the actual flow side of a reaper with a cutting height control device according to the present invention, and FIG. 1 is a side view of the main parts of the combine harvester, and FIG. 2 is a diagram of the elevation control system of the reaping section. 2... Main machine, 3... Reaping section, 5... Sensor for cutting height control, I... Interlocking mechanism.

Claims (1)

[Scope of utility model registration request] In a reaper in which a ground-contact type cutting height control hinger 5 is attached to a reaping section 3 that is connected to the main machine 2 so that it can be raised and lowered, the operated piece 7D and the reaping section 3 rise above a certain level. A protruding piece 7C that brings into contact and suppresses the operated piece 7D as it is displaced.
are distributed between the fixed part on the main machine 2 side and the frame 3D of the reaping part, and the sensor 5 and the operated piece 7D are interlocked and connected via a wire 7E, so that when the reaping part 3 reaches a certain level or more, A reaper with a cutting height control device comprising an interlocking mechanism 7 that automatically and reversibly switches the sensor 5 to a non-contact storage position with respect to the ground in conjunction with an upward displacement of the sensor 5.