JPS6142347Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention includes a device for detecting the presence or absence of grain culms at the front lower part of the machine body, a device for detecting the length of grain culms behind it, and a handling depth changing mechanism and both of the above-mentioned detection devices. In conjunction with an automatic control mechanism, when the presence/absence detection device detects the presence of grain culms, the handling depth changing mechanism is automatically controlled based on the detection result of the culm length detection device so that the handling depth is maintained within a set range. The present invention relates to a combine harvester configured to adjust the handling depth when the presence/absence detecting device detects the absence of a grain culm.

The above-mentioned combine harvester prevents troubles caused by unexpected activation of the control mechanism during non-operation, but conventionally, when the presence/absence detection mechanism enters the grain culm presence detection state or grain culm absence detection state, Since the control mechanism was set to be activated or deactivated immediately, the presence/absence detection device and the culm length detection device were separated from each other in the longitudinal direction of the machine, so the presence/absence detection device was not activated at the start of work. At the same time as the presence detection state is reached, the culm length detection device enters the short culm detection state and the handling depth changing mechanism is operated.As a result, when the grain culm reaches the culm length detection device position, the grain culm holding and conveying device etc. The alignment of the handling depth changing member to the desired position may be delayed,
There are problems caused by unnecessary operation of the handling depth changing mechanism, such as early fatigue failure of the changing mechanism.
At the end of the work, the presence/absence detection device enters the grain culm absence detection state, and at the same time the control mechanism becomes inactive, allowing the handling depth for the remaining grain culm between the presence/absence detection device section and the culm length detection device section. There was a problem where control was not performed.

The purpose of the present invention is to solve the above-mentioned problems at once with a simple improvement, and in the above-mentioned combine harvester, the handling depth changing mechanism is activated after a set time from the time when the presence/absence detection device detects the presence of grain culm. The control mechanism is characterized in that the control mechanism is provided with a delay mechanism that brings the handling depth changing mechanism into the enabled state, and a delay mechanism that brings the handling depth changing mechanism into the inactive state after a set time from the time when the absence of grain culm is detected by the presence/absence detection device. do.

That is, a delay mechanism that activates the control mechanism a set time after the grain culm presence detection device detects the presence of grain culm, and a delay mechanism that activates the control mechanism after a set time from the time the grain culm presence detection device detects the absence of grain culm. Since a delay mechanism is provided to deactivate the mechanism,
If each of the above set times is the time required for a grain culm to reach the culm length detection device after passing through the presence/absence detection device, then at the start of work, the first grain culm is not handled until it reaches the culm length detection device. The depth change mechanism is operated, and since the handling depth change control is stopped only after the last grain culm has passed the culm length detection section at the end of the work, it is as simple as adding the delay mechanism. Even with this improvement, the problem of unnecessary operation of the conventional handling depth changing mechanism and the problem of not adjusting the handling depth for residual grain culms can be solved.

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

The pre-processing section installed in the combine is constructed by extending a frame 3 forward from a main body in which a threshing device 2 is mounted on a crawler-type traveling machine stand 1, and a plurality of grain culm locking and conveying claws 4... Endless chain with (not shown)
The lifting devices 5a, 5 configured to horizontally drive the
b are located toward the rear of the machine toward the upper end, and are installed obliquely on the left and right sides of the lifting path A, so that the planted grain culms are aligned with the path A and the conveying claws 4 of both lifting devices 5a and 5b , 4, a clipper-type reaping device 6 for reaping the raised grain culms, and a grain culm pulling device 6 for raising the grain culms in cooperation with the grain culms 7, A device 8 for pinching and conveying the grain culm, and a pair of right and left scraping wheels 9, 9 for feeding the stock side of the raised grain culm to the reaping device 6 and for feeding the harvested grain culm to the pinching and conveying device 8 are connected to the frame. It is attached to body 3.

A device 10 for detecting the culm length of grain culms in the lifting device 5, a device 11 for detecting the presence or absence of grain culms in the lifting device 5, and a mechanism 12 for changing the handling depth in the threshing device 2 are provided, and both of the above-mentioned The detection devices 10 and 11 and the handling depth changing mechanism 12 are linked by an automatic control mechanism 13, and when the grain culm presence is detected by the presence/absence detection device 11, handling is performed based on the detection result of the culm length detection device 10. The depth changing mechanism 12 is configured to automatically adjust and operate to maintain the handling depth within a set range.

That is, as shown in FIGS. 1 and 3, the culm length detection device 10 includes a sensor 14 that swings rearward upon contact with a grain culm to detect the presence of a grain culm, and a sensor 14 that detects the presence of a grain culm. A grain culm presence/absence detecting device 16 is configured, which includes a switch section 15 that emits a signal when detecting the presence of a grain culm, and each sensor 14 is in a state of protruding into the lifting path A and parallel in the culm direction. The three presence/absence detectors 16 are arranged on the upper part of the lifting device 5, and the respective switch portions 15 are fixedly attached to the front surface of the right lifting device 5b.

The grain culm presence/absence detecting device 11 includes a sensor 17 and a switch section 1 similar to the sensor 14 and switch section 15 in the presence/absence detecting tool 16.
8, and the sensor 117 is connected to the lifting path A.
The switch section 18 is disposed at the lower part of the lifting device 2 in such a manner that it protrudes, and the switch section 18 is fixedly attached to the back surface of the right lifting device 5b.

As shown in FIG. 4, the handling depth changing mechanism 12 is configured such that the position of the clamping and conveying device 8 on the conveyance start end side can be changed freely in the direction of the culm around the horizontal axis X on the conveyance end side. and a member 22 screwed onto a screw shaft 21 that is rotated by a reversibly rotatable electric motor 20 via a gear mechanism,
As the screw shaft 21 is rotationally driven, the arm 2 is moved by the screw member 22, which moves in the axial direction of the screw shaft 21.
3 and a rotating shaft 24, and the swinging arm 25 and the clamping and conveying device 8 are pivotally connected by a rod 26.
That is, as the motor 20 is driven, the clamping and conveying device 8 swings, and its clamping position with respect to the grain culm inherited from the two scraping wheels 9, 9 is changed.

As shown in FIG. 2, the automatic control mechanism 13 compares and determines the culm length of the raised grain culm with a preset standard length based on the signal from the culm length detection device 10, and determines the result. a discriminating device 27 that transmits a signal, a device 28 that detects the swinging position of the clamping and conveying device 8 and transmits the result, and the discriminating device 27
and a device 29 that determines whether or not the handling depth changing mechanism 12 needs to be operated based on the signal from the position detection device 28 and transmits the result, and the transmitting device 2
a device 30 that drives or stops the motor 20 based on a signal from the device 9; and a device 30 that drives or stops the motor 20 based on a signal from the presence/absence detection device 11;
Device 31 for switching 9 between active and non-active states
is provided.

The discriminating device 27 is configured such that when the sensors 14 in the culm length detecting device 10 swing, it is raised and determines that the grain culm is longer than the standard, and all the sensors 14...
If only two of them on the stock side shake, it will be raised and it will be determined that the grain culm is the standard length, and all the sensors 14...
…Whether all of them are in a non-fluctuation state or the one on the most stock side
If only the book shakes, it will be triggered and it will be determined that the grain culm is shorter than the standard.

As shown in FIG. 4, the position detection device 28 includes a variable resistor 32 which is changed by the rotary shaft 24 via a gear mechanism as the handling depth changing mechanism 12 is operated. Based on the change in resistance, it is detected that the holding and conveying device 8 is at a position corresponding to a short culm, a position corresponding to a standard culm length, or a position corresponding to a long culm.

The transmitting device 29 is configured to send an activation signal to the motor operating device 30 to rotate the motor 20 forward or reverse when the signal from the discriminating device 27 and the signal from the position detecting device 28 are different. , when the signals from both devices 27 and 28 match, a stop signal is sent to the motor operating device 30.

In configuring the switching device 31, the operation starts from the time when the presence/absence detection device 11 detects the presence of a grain culm, and the time required for the triggered grain culm passing through the presence/absence detection device section to reach the culm length detection device section is determined in advance. A first timer 33 that transmits the grain culm presence detection result after a set time has elapsed, and the transmitting device 2 based on the signal from the first timer 33.
A first delay mechanism 35 is provided, which includes a device 34 for operating the first timer 9, and a first delay mechanism 35 that starts operating from the time when the presence/absence detection device 11 detects the absence of a grain culm, and which is the same as the set time of the first timer 33. A second delay comprising a second timer 36 that transmits the grain culm absence detection result after a set time has elapsed, and a device 37 that operates the transmitting device 29 to be inactive based on the signal from the second timer 36. A mechanism 38 is provided. That is, the first delay mechanism 35 enables the handling depth changing mechanism 12 after the set time from the time of grain culm presence detection, and the second delay mechanism 38 enables the handling depth change mechanism 12 to operate from the grain culm absence detection time. After a period of time, the handling depth changing mechanism 12 is brought into a non-operating state.

[Brief explanation of the drawing]

The drawings show an embodiment of the combine harvester according to the present invention, and FIG. 1 is a side view of the combine pre-processing section, and FIG.
The figure is a block diagram of the handling depth control system, FIG. 3 is a front view of the lifting device, and FIG. 4 is a diagram of the handling depth changing mechanism. 2... Pulling device, 10... Culm length detection device, 1
1... Grain culm presence/absence detection device, 12... Handling depth changing mechanism, 13... Automatic control mechanism, 35, 38... Delay mechanism.

Claims (1)

[Scope of utility model registration request] A grain culm presence/absence detection device 11 is provided at the front lower part of the machine body, a grain culm length detection device 10 is provided behind it, and a handling depth changing mechanism 12 and both of the detection devices 10,
11 are linked by an automatic control mechanism 13, and when the presence/absence detection device 11 detects the presence of a grain culm, the handling depth changing mechanism 12 is controlled so that the handling depth is within a set range based on the detection result of the culm length detection device 10. The combine harvester is configured to be automatically adjusted so as to be maintained, and is configured to cause the handling depth changing mechanism 12 to be inactive when the presence/absence detection device 11 detects the absence of grain culm, a delay mechanism 35 that makes the handling depth changing mechanism 12 operational after a set time from the time when the presence/absence detection device 11 detects the presence of a grain culm; A combine harvester characterized in that the control mechanism 13 is provided with a delay mechanism 38 that puts the handling depth changing mechanism 12 into a non-operating state.