JPH084420B2 - Thresher depth control device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a thresher such as a combine harvester, for example, and relates to a threshing depth adjusting device for a threshing machine that threshes a grain cullet that is held and conveyed by a feed chain with a handling cylinder. .

[Prior Art] Conventionally, as shown in JP-A-53-98231, a conveying member for feeding a grain culm to a threshing section is displaceably provided by a handling depth adjusting member, and a threshing load of a handling barrel is detected. There is a technique including a load sensor and a handling depth sensor that detects a grain culm sent by the transport member.

"Problems to be solved by the invention" In the conventional technology, since the threshing load is low until the grain culm is supplied and the normal continuous working state is started when the work is started, the transport member is located on the deep side. The threshing load is likely to increase rapidly due to the supply of grain culm, and there is a problem that threshing is started at an extremely high load, and the handling depth adjustment range of the transport member is changed by properly using a plurality of handling depth sensors depending on the increase or decrease in the threshing load. There was a problem that the handling depth control range was restricted, and deep handling work with a low threshing load or shallow handling work with a high threshing load could be significantly limited.

"Means for Solving the Problem" However, the present invention is provided with a conveying member that feeds a grain culm to the threshing section so as to be displaceable by the handling depth adjusting member, and a load sensor that detects the threshing load of the handling cylinder, In a device provided with a handling depth sensor for detecting grain culm sent by the conveying member, the handling depth sensor is attached by a detection position changing member so as to be displaceable in the grain culm longitudinal direction, and the handling depth sensor is set to the shallowest before the start of work. Detection position changing member control to move to the detection position, handling depth adjusting member control to move the conveying member to the middle of the handling depth adjusting range by work start operation, and transfer member to the shallow handling side when the threshing load is above a predetermined level. Control of the handling depth adjustment member to move,
The detection position changing member control that moves the handling depth sensor to the deep handling side when the threshing load is below a predetermined level and the handling depth adjustment member control that moves the transport member to the deep handling side to the position where the handling depth sensor detects the grain cutting tip , And each of them is provided with a controller for automatically performing them.

Therefore, from the shallow handling side, the handling depth sensor is automatically moved to the shallowest detection position before the work is started, and the transport member is automatically moved to the middle of the handling depth adjustment range when the work is started. The deep handling side can be controlled to prevent a rapid increase in the threshing load at the start of work, as well as the occurrence of unhandled residue due to the support of the transporting member on the shallow handling side. Since it is automatically moved to the side, it is possible to easily prevent problems due to overload operation of the handling cylinder, and further move the handling depth sensor to the handling side to move the handling member to the handling side due to the threshing load below. Therefore, it is possible to carry out deep handling work as much as possible while maintaining an appropriate threshing load, and prevent over-handling. It can be easily maintained, and the threshing load and handling depth are high. And improvement as well as improvement of the grain collection efficiency of each control function is intended to obtain aim ease.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. Fig. 1 is a circuit diagram of the depth control circuit, Fig. 2 is a side view of the combine,
FIG. 3 is a plan view of the same, in which (1) is a track frame in which traveling crawlers (2) and (2) are mounted on the left and right, (3)
Is a machine base supported by the track frame (1),
(4) is a threshing section in which a feed chain (5) is stretched on the left side and a handling cylinder (6) is installed, and (7) is a rotary support shaft provided with a cutting blade (8) and a grain culm transport mechanism (9). (10) and a mowing section supported in front of the threshing section (4) via the lifting cylinder (11), (12) a straw cutting section provided behind the threshing section (4), and (13) a fried cylinder A paddy tank for accumulating grains taken out from the threshing section (6) via (14), (15) an engine for driving each section of the combine, (16) a driver's seat (17) and a driving operation section (18) It is a driver's cab equipped with, and is configured to continuously cut and thresh grain culms.

As shown in FIG. 4, the grain culm transport mechanism (11) of the mowing section (9) is provided with a vertical transport chain (19) which is a transport member, and cuts the grain culm by cutting the culm with the cutting blade (10). The chain (19) is formed so as to convey it to the starting end of the feed chain (5), and the vertical conveying chain (19) is swingably displaceably supported by the upper end side support rod (20) as a fulcrum. 19) The end of the feed chain (5) is brought into contact with and separated from the start of the feed chain (5) to adjust the handling depth, and a handling depth adjusting motor (21) serving as a handling depth adjusting member for displacing the vertical transport chain (19) is provided, The slider (23) is screwed onto the output shaft (22) of the motor (21), and the slider (23) is attached to the lower end side support rod (24) of the vertical transport chain (19) via the interlocking rod (25). ) Are connected, and the handling depth adjusting motor (21) is rotated forward and backward to connect the end of the vertical transport chain (19) to the start of the feed chain (5). Is configured so as not performing threshing depth adjusted to.

Further, a photoconductive type handling depth sensor (28) is arranged above the inlet supply plate (27) forming the handling port (26) on the front side of the threshing unit (4), and the inlet supply plate is provided by the vertical transfer chain (19) or the like. (27) While detecting the grain culm sent to the upper surface and the tip of the grain culm by the handling depth sensor (28) based on the amount of reflected light of the irradiation light,
Equipped with a handling depth detection motor (29) which is a detection position changing member,
The handling depth sensor (28) is screwed and supported on the output shaft (30) of the motor (29), and the upper surface of the inlet supply plate (27) is located within the range of the shallow limit switch (31) and the deep limit switch (32). A handling depth sensor (28) is supported via its output shaft (30) so as to be displaceable in the longitudinal direction of the grain culm.

Further, as shown in FIG. 1, the load sensor (33) for detecting the threshing load based on the rotation speed of the handling cylinder (6) and the cutting height sensor arm (34) provided on the lower surface side of the mowing section (7) are interlocked. And a cutting height sensor (35) for detecting a cutting height, and the cutting depth sensor (28), the load sensor (33) and the cutting height sensor (35) are constituted by a microcomputer. Connect to (36).

Further, the threshing clutch switch (37) that detects the drive stop of the threshing unit (4), the cutting clutch switch (38) that detects the drive stop of the mowing unit (7), and the tip detection reference value of the handling depth sensor (28). Tip setting device (39) for setting the load and load setting device (40) for setting the reference load of the load sensor (33)
And the cutting height setting device (41) that sets the reference cutting height of the cutting height sensor (35) and the cutting depth position sensor that detects the cutting depth position in conjunction with the cutting depth adjustment operation of the vertical transport chain (19). (42) and
The input is connected to the depth control circuit (36).

Further, the handling depth adjusting motor (21), the handling depth detecting motor (29), an elevating cylinder advancing / retreating member (43) for controlling the operation of the elevating cylinder (11) to elevate the mowing section (7), and the combine machine body. A traveling clutch on / off member (44) for running or stopping the reaper and a reaping clutch on / off member (45) for reaping or stopping the reaping section (7), the handling depth control circuit (3).
6) Connect the output to.

Then, based on the output of the load sensor (33) that detects the threshing load of the handling barrel (6) and the output of the handling depth sensor (28) that displaces in the longitudinal direction of the grain culvert by the handling depth detection motor (29), the handling depth adjustment motor (21) and the handling depth detection motor (29) are controlled to displace the vertical transfer chain (19) so that the threshing load of the handling barrel (6) is kept below the set value so that the deepest handling state is reached. The system is configured to perform threshing work in a deeply handled state.

As is clear from the above, the vertical transfer chain (19) that is a transfer member that feeds the grain culms to the threshing section (4) is displaceably provided by the handling depth adjusting motor (21) that is the handling depth adjusting member, and A load sensor (3 that detects the threshing load on the handling cylinder (6)
3) and a handling depth sensor (28) for detecting grain culms sent by the vertical transport chain (19), the handling depth sensor (28) is a handling depth detection motor (detection position changing member). 29) attached so that it can be displaced in the longitudinal direction of the grain culvert,
The handling depth detection motor (29) that moves the handling depth sensor (28) to the shallowest detection position before starting work, and the handling depth that moves the vertical transport chain (19) to the middle of the handling depth adjustment range by the work start operation. Adjustment motor (21) control, handling depth adjustment motor (21) control that moves the vertical transfer chain (19) to the shallow handling side when the threshing load is above a predetermined level, and handling depth sensor when the threshing load is below a predetermined level Handling depth detection motor (2) that moves (28) to the handling side
9) Control and handling depth controller (28) that automatically moves the handling depth adjustment motor (21) that moves the vertical transfer chain (19) to the deep handling side to the position where the grain cutting tip is detected by the handling depth sensor (28). A certain depth control circuit (36) is provided.

This embodiment is constructed as described above, and is shown in FIGS.
As shown in the flowchart in the figure, when the threshing unit (4) is stopped, the handling depth detection motor (29) is operated to move the handling depth sensor (28) to the shallowest position, and the shallow limit switch (31). Is turned on to support the handling depth sensor (28) at the shallowest position and the reaper (7) is stopped,
Operate the handling depth adjustment motor (21) to move the vertical transfer chain (19).
Is moved to the deepest position, and the vertical transport chain (19) is stored and supported inside the machine.

Further, when the threshing unit (4) and the mowing unit (7) are operated, the vertical conveyance chain (19) is moved to a preset standard position by the handling depth adjusting motor (21), and after the standard position is moved. When the handling depth sensor (28) does not detect the grain culms sent from the vertical transport chain (19) to the feed chain (7) after a certain period of time has passed, the mowing unit (7) is gradually changed at regular intervals. Lower until the cutting height reaches the minimum set height.

Further, when the handling depth sensor (28) detects a grain culm or when the cutting height of the mowing unit (7) reaches the minimum height, the threshing load (rotating speed of the handling cylinder or Input torque).

Then, when the threshing load detected by the load sensor (33) is larger than the set value, the harvesting work is interrupted by stopping the traveling of the combine and the reaper (7) due to the rapid increase of the threshing load, while in other cases, the standard position. The vertical transport chain (19) is moved step by step to the shallow handling side,
Continue to harvest and reduce the threshing load.

When the threshing load is neither too large nor too small, the threshing load is repeatedly input by detecting the grain culm of the handling depth sensor (28) and checking the operation of the reaper (7), and the harvesting operation is continuously performed. On the other hand, when the threshing load is smaller than the set value, the handling depth detection motor (29) is actuated to move the handling depth sensor (28) to the deep handling side, and the boundary between the grain culm tip and the inlet supply plate (27). Depth sensor (28) based on the amount of reflected light when
The tip of the grain culm is detected by this and the vertical transfer chain (19) is moved to the deep handling side. The handling depth sensor (28)
Moves to the deep handling side to detect the tip of the grain culm and the grain depth of the grain culm is detected by the handling depth sensor (28).
When the threshing load increases up to the set value by repeating the deep-movement-side movement, the grain-crop detection and the reaping section (7) of the deep-handle sensor (28) are performed. ) By checking the operation, keep the deep handling condition as much as possible, keep the threshing load almost constant, and carry out the harvesting operation continuously.

Further, the deep handling side sensor (28) and the vertical transfer chain (19) are repeatedly moved on the deep handling side in the state of the threshing load being too small, and the deep working limit sensor (28) is moved to the deepest position, and the deep limit switch (32) is reached. When the operation is activated, the vertical transfer chain (19) is moved to the shallow handling side in order to detect the grain culm tip by the handling depth sensor (28). When the threshing load is below the setting, the handling depth sensor (28) While supporting it at the deepest position of
The vertical conveyance chain (19) is supported at the deepest position where the handling depth sensor (28) detects the tip of the grain culm, and the harvesting work is performed in the deepest handling state.

As described above, by moving the handling depth sensor (28) to the shallowest position before the start of the harvesting work and sending the grain culms by the vertical transport chain (19), until the threshing load increases more than the setting, or Until the depth limit switch (32) is activated, the handling depth sensor (28) is moved to the deep handling side, and at the start of the harvesting operation, the vertical transfer chain (19) is moved to a standard position approximately in the middle of the handling depth adjustment range. When the harvesting work is performed with the threshing load above the setting, the vertical transport chain (19) is moved to the shallow handling side to reduce the threshing load so that the threshing load becomes the set value, while the threshing load is set. When the harvesting work is performed below, the vertical transport chain (19) is moved to the deep handling side in conjunction with the deep handling side movement of the handling depth sensor (28) until the threshing load increases above the setting, or Handle as deep as possible until the depth limit switch (32) is activated. In performing the harvest work.

Although the handling depth sensor (28) is a non-contact type structure in the above-mentioned embodiment, it is also possible to easily configure a contact type structure for detecting the presence or absence of the grain and the tip of the grain by contacting the grain. , Handle depth sensor (28), inlet supply plate (27)
Although it is provided on the upper side, it can be easily provided on a grain culm transport system path such as the reaping section (7) or a straw unloading system path.

"Effects of the Invention" As is apparent from the above-described embodiments, the present invention uses the conveying member (19) for feeding the grain culms to the threshing unit (4) as the handling depth adjusting member (2).
1) is provided so as to be freely displaceable, and a load sensor (33) for detecting the threshing load of the handling cylinder (6) and the transfer member (1).
9) In a device equipped with a handling depth sensor (28) for detecting grain culm sent by the above, the handling depth sensor (28) is attached by a detection position changing member (29) so as to be displaceable in the longitudinal direction of the grain culm, and the work is started. The detection position changing member (29) that moves the handling depth sensor (28) to the shallowest detection position before, and the handling depth adjusting member (29) that moves the conveying member (19) to the middle of the handling depth adjustment range by the work start operation 21) control, a handling depth adjusting member (21) for moving the conveying member (19) to a shallow handling side when the threshing load is above a predetermined level, and a handling depth sensor (28) when the threshing load is below a predetermined level. Detection position changing member (29) for moving to the deep handling side and handling depth adjusting member (21) for moving the conveying member (19) to the deep handling side to a position where the handling depth sensor (28) detects the grain tip.
Controllers that control each automatically (36)
The handling depth sensor (28) is automatically moved to the shallowest detection position before the work is started, and the transport member (19) is automatically moved to the middle of the handling depth adjustment range when the work is started. Therefore, it is possible to control from the shallow handling side to the deep handling side to prevent a rapid increase in the threshing load at the start of work, and to prevent the occurrence of unhandled residue due to the support of the transport member (19) on the shallow handling side. Since the transfer member (19) is automatically moved to the shallow handling side by the load, it is possible to easily prevent the occurrence of troubles due to the overload operation of the handling cylinder (6), and further, the threshing load below a predetermined level causes the handling depth sensor (28 ) Is moved to the deep side and the transport member (1
Since 9) is moved to the deep handling side, it is possible to carry out deep handling work as much as possible while maintaining an appropriate threshing load and prevent unhandled residue, making the threshing load at the start of work and the handling depth adjustment control more stable than before. In addition, the threshing load can be maintained appropriately and the threshing load and the handling depth can be easily improved, and the grain collection efficiency can be easily improved.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a depth control circuit showing an embodiment of the present invention, and FIG.
FIG. 4 is a side view of the combine, FIG. 3 is a plan view of the combine, FIG. 4 is an explanatory view of handling depth adjustment, and FIGS. 5 and 6 are handling depth control flowcharts. (4) …… Threshing part (6) …… Handling barrel (19) …… Vertical transport chain (transport member) (21) …… Handling depth adjusting motor (handling depth adjusting member) (28) …… Handling depth sensor ( 29) …… Handling depth detection motor (detection position changing member) (33) …… Load sensor (36) …… Handling depth control circuit (controller)

Claims (1)

[Claims] 1. A load sensor for detecting a threshing load on a handling cylinder (6) while a transporting member (19) for feeding grain culms to a threshing section (4) is displaceably provided by a handling depth adjusting member (21). (3
3) and a handling depth sensor (28) for detecting a grain culm sent by the conveying member (19), the handling depth sensor (28) detects the grain culm longitudinal direction by a detection position changing member (29). It is attached to the handle so that it can be displaced freely, and moves the handling depth sensor (28) to the shallowest detection position before starting the work. When the threshing load is less than a predetermined value, the handling depth adjusting member (21) is controlled to move to a shallow position, and when the threshing load is greater than a predetermined value, the conveying member (19) is moved to a shallow handling side. Position control member (29) for moving the handling depth sensor (28) to the deep handling side and handling depth sensor (28)
A thresher equipped with a controller (36) for automatically performing a handling depth adjusting member (21) control for moving the carrying member (19) to the deep handling side at a position where the grain cutting tip is detected by Depth adjustment device.