JPS6192507A - Reaping part lift apparatus in combine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to an improvement in a combine harvester equipped with a mechanism for automatically adjusting the height of the cutting section.

(Prior art) A combine harvester equipped with an automatic reaping section height adjuster next to it has a height sensor that detects the height of the reaping section, and uses the sensor output to drive and control the elevating device of the reaping section to reap the harvest. It automatically raises or lowers to a certain height that you set.
On the other hand, the reaping section can be raised and lowered to any desired height by manual operation as needed. (For example, Japanese Utility Model Application Publication No. 54-164234).

(Problem to be solved by the invention) When manually lifting the reaping section in such a combine harvester, conventionally the height was automatically adjusted or the height did not move during manual operation, so the inertia of the reaping section and Due to a delay in the response of the hydraulic valve in the lifting device, small chokes tended to occur where the mowing section penetrated into the ground, damaging the cutting rod and cutting blade.

In view of these points, the present invention has been developed to prevent the cutting part from being lowered too low inadvertently when manually lowering the cutting part that automatically reaches a certain height. The purpose is to safely protect the cutting blade from collision with the ground.

In order to achieve the object, the present invention provides a manual operation means 3 for manually raising and lowering the reaping part l, as shown in the functional flowchart of FIG. , is connected to an automatic manual selection means 7 together with a comparison means 6 for comparing whether the height of the reaping part l is a set height, and the selection means 7 selectively determines whether manual operation should be prioritized over automatic operation, and the reaping part l is If the height is less than the set height, automatic operation will be given priority.

That is, the present invention provides a combine harvester equipped with a reaping section 1 that can be raised and lowered, and includes: a manual operation means 3 for manually operating the elevator 2 of the reaping section I; a height sensor 4 for detecting the height of the reaping section; height setting means 5 for outputting a signal corresponding to the predetermined height of section l;

Comparing means 6 for comparing the values of the output signals of the height sensor 4 and the height setting means 5, and based on the output signals of the manual operation means 3 and the comparing means 6,
and automatic manual selection means 7 for selecting whether to operate the elevator 2 manually or automatically.

and elevator control means 8 for operating the elevator 2 based on a manual or automatic operation signal output from the selection means 7.

(Function) Since the present invention has the above-described configuration, when a manual lowering signal for lowering the elevator 2 of the reaping section 1 is outputted by the manual operation means 3, the actual height H of the reaping section 1 at that time is set to the height setting. Reaping height H set by means 5.

If it is higher than , the automatic manual selection means 7 selects a manual lowering signal, and the elevator control means 8 thereby drives the elevator 2 to lower the reaping section l. As a result, the reaping height H set by the reaping unit l.

When the automatic manual selection means 7 stops the manual descent signal based on the output of the comparison means 6, the automatic manual selection means 7 stops the manual descent signal.

Stop the reaping part l.

At this time, if the descending speed of the reaping section 1 is fast, even if the descending signal is stopped, the reaping section 1 may descend to a lower level than the set reaping height Ho due to inertia. , the automatic manual selection means 7 outputs an automatic lift signal to raise the reaping part l to the height HO.

(Example) Next, the present invention will be explained in detail.

Figure 2 is an overview of the entire combine, where l indicates the reaping section equipped with the dividing rod, cutting blade, grain rod lifting chain, etc. Reaping section 1
rotates around the spindle lO with respect to the combine main body 9 and moves up and down. Reference numeral 2 denotes a hydraulic elevator for raising and lowering the reaping section l. A rotary potentiometer 4a is mounted around the axis of the support shaft 10 as a height sensor 4 for detecting the relative position of the reaping section 1 with respect to the main body 9. (The height sensor 4 may be one that measures the distance between the cutting part and the ground based on the rotation angle of a grounding piece on the bottom of the cutting part.) 11 is an endless belt for running.

The hydraulic circuit of the elevator 2 is provided with an electromagnetic switching valve as the elevator control means 8.

A manual up switch 3a and a manual down switch 3b are installed in the operator's seat of the combine as manual operation means 3, and a set volume switch 5a is installed as height setting means 5.As shown in the block diagram of FIG.
A manual up switch 3a and a manual down switch 3b are connected to the input terminals of 12, and a set volume switch 5a and a potentiometer 4a are connected through a comparator 6a, respectively, and the output side is connected to the elevator 2 through an elevator control means 8.
Connect.

(force) and turn on the automatic switch SW, reaping B
The height of l is at a predetermined midpoint Hs (for example, 40 cm above the ground)
), the automatic height control works even if both the manual switch 3a and 3b are off, and the reaping section 1 automatically descends to the reaping height HO set by the centholium switch 5a and stops. If the reaping section 1 is higher than the intermediate point Hs, the reaping section 1 will not rise or fall unless the manual switch Sa or sb is turned on. The reaping part l is X! above the intermediate point Hs! I! Continuously ascending or descending until the midpoint H
In the s and lid directions, it rises or falls in a pulse manner, that is, repeating movement and stopping little by little. In this way, if the lifting speed of the reaping part l is changed slowly or rapidly around the intermediate point Hs at an appropriate height from the earth's surface, and if the speed is slowed down when the cutting part l is automatically raised or lowered on the side of the earth from the intermediate point Hs, then the This is convenient because it prevents the mistake of colliding the reaping part l with an obstacle.

Next, when the height of the reaping section 1 is lower than the intermediate point Hs, when the manual lowering switch 3b is turned on, the reaping section 1 is continuously lowered and reaches the reaping height HO set by the set polyurethane inch 5a. 1 and the output level of the comparator 6a is switched, the CPU 12 outputs a stop signal (output OFF signal) to the elevator control means 8, and the reaping section 1 stops at the height HO.

In this way, even if a stop signal is issued, the response of the elevator control means 8 to /help etc. is slow, or the inertia force when the reaping part 1 is lowered is large, and the reaping part 1 is lowered lower than the height HO. In this case, when the manual lowering switch 3b is turned off, the above-mentioned automatic height control is activated and the reaping portion 1 is automatically raised to the reaping height HO.

In addition, the circuit may be configured so that the automatic height control is activated to raise the reaping section l to the height HO even if the F dynamic lowering switch 3b is not turned off and is left on. According to the present invention, the manual operation means 3 is connected to the automatic manual selection means 7 together with the comparison means 6, so that even when the reaping section l is manually lowered, the manual operation signal is turned off when the reaping section l has been lowered to a certain height HO. The reaping section l is automatically stopped, and if the reaping section l falls too low than the height HO, the automatic operation signal from the comparison means 6 is selected instead of the automatic operation signal and the reaping section is stopped. l to height HO
Therefore, there is no risk of the cutting part l being lowered too low inadvertently, and the effect is that the cutting rod and cutting blade of the cutting part can be safely protected from collision with the ground.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram of the present invention, FIG. 2 is an overview diagram of a combine harvester embodying the present invention, FIG. 3 is a block diagram of an embodiment of the present invention, and FIG. 4 is a flowchart thereof. 2 is a reaping section, 2 is an elevator, 3 is a manual operation means, 4 is a height sensor, 5 is a height setting means, 6 is a comparison means, 7 is an automatic manual selection means, 8 is an elevator control means, 9 is a controller/controller Hayne body.

Claims (1)

[Claims] A combine harvester including a reaping section (1) that can be raised and lowered, comprising: a manual operation means (3) for manually operating an elevator (2) of the reaping section (1); a height sensor (4) that detects the height; a height setting means (5) that outputs a signal corresponding to the height set by the reaping section (1); a height sensor (4) and the height setting means. (5); and a comparison means (6) for comparing the value of the output signal with the manual operation means (3) and the comparison means (6). automatic manual selection means (7) for selecting whether to operate the elevator (2); and elevator control means (2) for operating the elevator (2) based on a manual or automatic operation signal output from the selection means (7).
8) A reaping section lifting device characterized by comprising: