JPS6230915Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a combine harvester with an automatic handling depth control mechanism configured to automatically operate a handling depth adjustment device based on a culm length detection result to stabilize the handling depth.

If the handling depth adjustment device is automatically operated based on the culm length detection result, the handling depth can be maintained at the appropriate depth without any special operation. It was difficult to do so. In other words, conventionally, the next step of reaping work was started with the handling depth adjustment device maintained at the final handling depth adjustment value from the previous reaping operation, but the culm length at the start of reaping and the If the final culm length fluctuates greatly, the handling depth adjustment device will have to be operated over a large range at the beginning of cutting, and it will take an appropriate amount of time to operate the handling depth adjustment device over a large range. As a result, a state in which the handling depth temporarily deviates significantly from the desired one is brought about. Furthermore, between a state in which the treatment depth is deep and a state in which the treatment depth is shallow, the latter case, which causes untreated parts, has a particularly large disadvantage. For this reason, a method has been proposed in which the handling depth adjustment device is automatically operated to the deepest handling adjustment value in the handling depth adjustment range, but in this case, although the problem of unhandling can be solved, it causes a large handling condition. There is a risk that the threshing equipment will be overloaded, and there is a problem in that it will put an unnecessary load on the threshing equipment, increase the generation of straw waste inside the equipment, and have a negative impact on the handling performance itself.

The structural features of the present invention devised to solve the problem are a detection device for detecting whether the machine is in a reaping state or a non-reaping state, and a storage means for storing the deepest handling position during reaping work. and a reset means that operates based on the detection of transition to the reaping work state by the detection device to update the stored value, and a reset means that operates based on the detection of transition to the non-reaping work state by the detection device, and and a handling depth adjusting device for adjusting the handling depth adjusting device to the deepest handling position stored by the means,
This characteristic configuration produces the following efficiency.

In other words, the length of the grain culm planted in one field is
Focusing on the fact that the shortest length of a grain culm in a small area of a field does not vary greatly in other parts of the field, which is approximately constant throughout one field, the handling depth correction device is operated to Since the handling depth adjustment device can be operated to the deepest handling value from the previous mowing operation, at the beginning of mowing,
It is possible to prevent shallow handling as much as possible while also preventing the handling depth adjustment device from operating over a large range. It became possible to perform good handling depth control.

Embodiments of the present invention will be described in detail below with reference to illustrative drawings.

Fig. 1 shows the front part of the combine harvester, and the front part of the traveling machine equipped with the threshing device 4 is equipped with a device 1 for raising the planted grain culm into an upright position, and an auxiliary device for pulling the raised grain culm backward. A conveying device 2, a reaping device 3 that cuts the stalks of grain culms moving rearward, a harvesting device 3, which conveys the merged grain stalks after harvesting to the rear with the stalks held in the stalks, and at the end of the conveyance. A reaping processing unit including a rear conveyance device 6 and the like that transfers the grain to the feed chain 5 of the rear threshing device 4 in a sideways posture is connected and supported by a support frame 7 which also serves as a transmission case. The grain culms that have been raised and reaped as they advance are sequentially supplied to the threshing device 4 for handling.

The rear conveyance device 6 is vertically swung around a fulcrum P at its terminal end, and this vertical oscillation changes the reaped grain culm support position at the starting end in the culm length direction, and as a result, the threshing device 4 It is configured as a handling depth adjustment device that changes the amount of grain culm inserted in the grain culm.

Next, the automatic handling depth control mechanism will be explained.

That is, the culm length of the grain culm in an upright position is placed on the back of the lifting device 1, and the lifting device 1 is placed at the tip of the grain.
Culm length detection device 8 detects vertical fluctuations relative to
is provided. This culm length detection device 8 has three electric sensors 8a, 8b, and 8c juxtaposed to be pressed and swung against the grain culm along the vertical direction, and detects a condition in which the grain culm is above the upper sensor 8a. , a state between the upper sensor 8a and the middle sensor 8b, a state between the middle sensor 8b and the lower sensor 8c, and a state below the lower sensor 8c. has been done.

An angle detection device 9 is provided at the fulcrum P of the rear conveyance device 6 to detect the swing angle of the conveyance device 6 as an actual handling depth adjustment value.

Further, as shown in FIGS. 2 and 3, the bibending link mechanism 10 interposed between the front end side of the rear conveyance device 6 and the support frame 7 is bent and extended via a worm deceleration mechanism 11. An electric motor 12 is provided that can freely rotate forward and backward.

As shown in the block diagram of FIG. 4, the detection results of the culm length detection device 8 and the detection results of the angle detection device 9 are input to the control circuit 18, and the culm length detection results and angle detection results are set in advance. It is determined whether there is a balanced relationship. Based on this determination result, the drive circuit 19 of the motor 12
It is configured to operate.

Further, as described below, this automatic handling depth control mechanism includes a working state detection device 17, a storage means for storing the deepest handling position during reaping work, and a reset means for updating the stored value. 20, and a handling depth correction device for adjusting the handling depth adjusting device 6 to the stored deepest handling position.

That is, the rotation support shaft 10b of the link 10a on the support frame side of the bi-folding link mechanism 10
A swinging arm 14 is provided, which is rotatably supported by the link 10a, and whose swinging posture with respect to the fixed frame is maintained by a friction mechanism 13.
In addition, a tongue piece 15 that presses and swings the arm 14 downward only when adjusting the deep handling side is connected to constitute a storage means for storing the deepest handling position during the reaping operation. An electromagnetic solenoid 20 is attached to the swing arm 14 as a reset means for updating the stored value, and is pressed by the tongue 15 and handled by the tongue 15 and the control circuit 18. An electric switch 16 is installed which constitutes a depth correction device. Further, a grain culm presence/absence detection sensor 1 is provided at the lower back part of the lifting device 1.
7 is provided. This grain culm presence/absence detection sensor 17
The machine sends an absence detection signal when the grain culm continues to be absent after one cycle of reaping work, such as at the edge of a field, and indicates whether the machine is in the reaping state or not. It is provided as a device for detecting whether the reaping operation is in progress. This type of detection device 1
As for 7, some configurations are already known, such as one in which the sensor contact is extended long, one in which the return speed of the contact is delayed by a damper, and one in which the transmission of the absence detection signal is electrically delayed. It is configured to prevent false positives caused by The electric switch 16 and the sensor 17 are connected to the control circuit 18, and when the sensor 17 detects the presence of a culm, the control circuit 18 is activated and the solenoid 20 is moved in and out of the rod 20a for a short period of time. is projected and engaged with the link 10a, and when the sensor 17 detects the absence of a culm and the electric switch 16 is pressed by the tongue piece 15, the operation of the control circuit 18 is stopped. It is structured as follows.

When one stroke of reaping work is completed and the absence of a culm is detected, the culm length detection device 8 becomes the shortest culm length detection state, and the rear conveyance device 6 is swung toward the deep handling side. , since the swing arm 14 is located at a position corresponding to the deepest handling adjustment value of the link 10a during the previous reaping operation,
The rear conveyance device 6 is automatically swung to the deepest handling adjustment value during the previous reaping operation.
When the reaping operation is started again, the swinging arm 14 is swung while being integrally connected to the link 10a via the solenoid 20 for a short period of time, and then the operation of the solenoid 20 is stopped. Then, it is pressed by the tongue piece 15 and is swung downward to the deepest adjustment value.

According to the above configuration, when the machine starts reaping work, the rear conveyance device 6 is automatically swung based on the culm length detection result to maintain an appropriate handling depth. When finishing the work and starting the next stage of reaping, the rear conveyance device 6 has been swung to the deepest handling adjustment value from the previous reaping operation, and the shallower This will prevent a handling situation from arising.

Incidentally, in implementing the present invention, for example, a mechanism for storing the deepest adjustment value of the angle detecting device 9 is provided,
It may be implemented in such a manner that the deepest handling adjustment value is automatically activated based on this stored value.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the combine harvester with an automatic handling depth control mechanism according to the present invention, in which Fig. 1 is a side view of the front part of the combine, Fig. 2 is a side view showing the swinging drive structure of the conveying device, and Fig. 3. is a longitudinal sectional front view of the same, and FIG. 4 is a block diagram. 6... Handling depth adjustment device, 17... Reaping work state detection device, 20... Resetting means.

Claims (1)

[Scope of utility model registration request] The combine harvester is equipped with an automatic handling depth control mechanism configured to automatically operate the handling depth adjustment device 6 based on the culm length detection result to stabilize the handling depth, and the combine harvester is equipped with an automatic handling depth control mechanism, and is configured to stabilize the handling depth by automatically operating the handling depth adjustment device 6 based on the culm length detection result. A detecting device 17 for detecting whether the reaping work state is in progress, a storage means for storing the deepest handling position during the reaping work, and a storage means based on the detection of transition to the reaping work state by the detecting device 17 in order to update the stored value. Based on the operating reset means 20 and the detection of transition to a non-reaping state by the detection device 17, the handling depth adjusting device 6 is adjusted to the deepest handling position stored by the storage means. A combine harvester with an automatic handling depth control mechanism, which is equipped with a depth correction device.