JPS5853884B2 - Reaping section lifting device in a reaper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a first state in which a reaping section, which is connected to the front part of the machine so that it can be raised and lowered by a drive, is raised and lowered by manual operation, and a sensor for detecting the current cutting height provided below the cutting. The present invention relates to a reaping section elevating device in a reaper, which is configured to be able to automatically switch to a second state in which the first drive raises and lowers the reaping section based on the detection result.

Generally, when harvesting in wet fields or highly humid fields, the current cutting height detection sensor installed below the cutting sinks below the ground surface, making it impossible to accurately detect the cutting height. Since there is a risk of erroneous detection, it is preferable to manually move the reaping unit up and down.In addition, in cases where the sensor can accurately follow the ground surface, such as in dry fields, the reaping operation may be difficult. In order to simplify the lever operation involved in adjusting the cutting height in the middle, it is desirable to have automatic control means that automatically raises and lowers the mower based on the detection result of the sensor.

In this way, it is necessary to switch the raising/lowering state of the reaping part to the above-mentioned first state or second state based on the field conditions, but conventionally, the first lever that raises and lowers the reaping part by manual operation, and the automatic Since the second lever for switching between the control state and the manual control state was provided separately, it was easy to confuse the switching operation to the above-mentioned second state or second state, and furthermore,
If the operator forgets to operate the lever or misunderstands it, there is a danger that the operator may think that the second lever has been switched to manual control based on the sensor's detection results.

In view of the above-mentioned circumstances, the present invention not only makes it possible to quickly and easily switch to the first state or the second state based on field conditions, but also prevents the dangers associated with operator forgetting or erroneous operation. This is so that it can be avoided.

That is, the technical feature of the present invention is that the first state and the second state can be switched by operating a single lever for manual operation, and The operation route and the operation route in the second state of the automatic operation system are
A series of linear paths are formed so that the operating path for the automatic operating system is located on an extension of the manual operating system, following the descending end of the operating path for the manual operating system along the longitudinal direction of the aircraft. It has the following effects in certain respects.

With the reaping section lifting device of the present invention, it is possible to switch between manual lifting and automatic lifting by simply moving the lever for manual lifting in a straight line, and the operating path intuitively matches the actual lifting operation. Coupled with the fact that it follows the front and back direction of the machine, there is no confusion in switching operations based on field conditions such as dry or wet fields.

Moreover, since the automatic raising and lowering of the reaping section based on the detection result of the cutting height detection sensor is nothing but the raising and lowering control of the reaping section at the lowered position, switching to the automatic state (second state) is performed using the manual lifting operation lever. The operating mode of the present invention, in which the user pushes the lever beyond the lowering operating path, matches the actual operating situation, and there is no discomfort in the operating sensation.

Also. Since the switching path continues to the manual lowering operation position, switching based on field conditions can be performed with a small amount of operation.

Due to the various advantages described above, the present invention has been able to establish a safe operation mode that is free from the dangers associated with forgetting operations or misunderstandings as in conventional devices.

Embodiments of the present invention will be described below based on the drawings.

Fig. 1 shows a combine harvester, which is an example of a reaping machine, in which a threshing device 5 is mounted, and in front of the machine 1, there are two people with a hoisting device,
The reaping section 2, which is composed of a clipper-type reaping device 2B and a vertical conveying device 2C that changes the posture of the harvested husk culms in a vertical position to a sideways position and transports and supplies them to the threshing feed chain 5A, is operated by the reaping section. The reaping frame 2D supporting the reaping frame 2D is provided so as to be movable up and down around the first horizontal axis 8 at the end thereof, and between the two raising devices and the threshing device 5, and on the horizontal side of the vertical conveying device 2C. The control section 6 has a reaping section 2.
A first state in which the machine is manually driven up and down, and a second state in which it is automatically driven up and down based on the detection result of the current cutting height detection sensor 3 provided in the reaping section 2. Provided with one lever 4 that can be switched with
Between this lever 4 and the sensor 3, the ground contact 3a of the sensor 3 is moved between the sensing position and the weeding support rod 2 in conjunction with switching between the first state and the second state by the lever 4.
A linking mechanism 7 is provided which changes its position to a non-detection action position which is retracted above E.

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

That is, a setting signal from a setting device 8 configured to change the output voltage by setting the position of the lever 4, and a detection signal from a level detector 9 configured to change the output voltage by changing the attitude of the reaping frame 2D. is input to the comparator 10, and the difference signal from the comparator 10 is input to the discriminators 11A and 11B for raising and lowering, which determine whether the reaping section 2 should be raised or lowered. ,
An amplifier 14A connects a control valve 13 that controls the operation of a hydraulic cylinder 12 that raises and lowers the reaping section 2 around the first horizontal axis 8, and both row separators 11A and 11B.
, 14B, so that the reaping section 2
The control valve 13 is switched and operated by a command signal from one of the discriminators 11A or 11B to raise or lower the setting signal from the setting device 8 and the detection signal from the level detector 9 until they become equal. are doing.

Further, a control mechanism for automatically raising and lowering the reaping section 2 based on the detection result of the sensor 3 is configured as follows.

That is, a first switch SW1 detects that the ground contact 3a of the sensor 3 is oscillated upward by a certain amount or more, and a second switch SW2 is used to detect that the ground contact 3a is oscillated downward by a certain amount or more. At the same time, the detection signals from these rain detection switches 5W1SW2 are inputted to the control valve 13 via amplifiers 15A and 15B, so that when the first switch SW1 is activated for detection, a rising signal is sent to the valve 13. is output to drive and raise the reaping section 2, and the second switch SW
2 is detected and activated, a descending signal is output to the valve 13 to drive the reaping section 2 downward.

Further, at the connection point between the manual control circuit and the automatic side leg circuit, the lever 4 is located in a manual operation range P1 of a series of linear paths 17 formed on the operation guide plate 16, or A third switch sW3 is provided which detects whether the vehicle is located within the automatic operation range P2 and switches between the manual control circuit and the automatic side leg state.

The linking mechanism 7 is constructed as shown in FIGS. 3 and 4.

That is, the sensor box 3A8 of the sensor 3 is pivoted to the fixed frame 7A provided on the weeding support rod 2E so as to be able to swing up and down about the second horizontal axis with respect to the direction of movement of the aircraft, and the sensor box 3A and the fixed frame 7A (c. the sensor box 3A including the ground contact 3a).
A spring 7B is interposed to force the entire unit to move downward, and the cessor box 3A and the lever 4 are interlocked and connected via the operating wire 7C. In conjunction with the switching operation, the ground contact 3a is changed between a detection action position and a non-detection action position in which it is retracted above the weeding support rod 2E against the elastic biasing force of the spring 7B. It is structured as possible.

Further, by appropriately setting the lever 4 within the automatic operation range P2 in the linear path 17, the detection reference position of the sensor 3 can be changed up or down.

Further, the lever 4 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.

In addition, 18 in the figure is a set bolt that regulates the lower limit position of the ground contact 3a of the sensor 3.

[Brief explanation of drawings]

The drawings show an embodiment of the reaping section elevating device in a reaping machine according to the present invention, Fig. 1 is an overall side view of the combine, Fig. 2 is an elevating control system diagram of the reaping section, and Fig. 3 is an enlarged side view of the main parts. FIG. 4 is an enlarged partially cutaway plan view of the main part. 1... Main machine, 2... Reaping section, 3...
...Sensor 4...Lever.

Claims (1)

[Claims] 1 Reaping section 2 connected to the front of the machine 1 so that it can be raised and lowered by a drive.
A first state in which the mowing section is driven up and down by manual operation, and a second state in which it is automatically driven up and down based on the detection result of the current cutting height detection sensor 3 provided under the reaping section 1 are controlled by the manual operation. The operating path of the manual operating system in the first state and the operating path of the automatic operating system in the second state are arranged along the longitudinal direction of the aircraft. A reaping part elevating device formed in a series of straight lines so that an operating path for an automatic operating system is located on an extension of the manual operating system, following a descending end of an operating path for the manual operating system. .