JPH0320207B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for adjusting the handling depth of grain culms in a combine harvester in which the handling depth of grain culms is adjusted by tilting a grain culm conveying device provided between a reaping device and a threshing device using the rear as a fulcrum. This invention relates to a height adjustment device.

Generally, a culm length detector is installed to detect the length of the grain culm, and the handling depth adjustment device is automatically operated based on the detection result, so that the grain culm of the appropriate length is always kept in the handling chamber of the threshing device. If the grain culm combing frame is equipped with the above-mentioned culm length detector, the culm length can be determined with the grain culm stretched out. As a means for feedbacking the relative position of the adjustment device, a method can be considered in which a culm length detector is slidably provided on the grain culm combing frame and the culm length detector is linked to the handling depth adjustment device. The problem is that the culm length detector, which is configured to be able to slide freely in the direction along the frame, must be activated by the movement of the handling depth adjustment device, which rotates in a direction different from that of the culm length detector, resulting in a complicated interlocking configuration. be.

Furthermore, if the culm length detector is fixed to a machine body such as a reaping frame at the grain culm tip position, and the handling depth conveyance device is tilted relative to the culm length detector, it is necessary to provide the above-mentioned feedback means. However, when the handling depth conveyor device is tilted based on culm length detection, the relative position of the culm length detector and the handling depth conveyor device changes, causing the tip of the grain to shed grains from the culm length detector or causing conveyance disturbance. There is a problem.

Furthermore, it is conceivable to provide a culm length detector integrally with the canopy guide plate at the end of the grain culm conveying device near the supply port of the threshing device to detect the tip of the grain culm in a sideways posture. In some cases, the grain culm is detected in a sideways posture, so the tip of the grain culm tends to receive resistance from the leaning guide plate, and it is also a place where straw waste is likely to accumulate, so false detection is likely to occur. The drawback was that the temperature could not be adjusted.

The present invention has been made in view of these problems, and has an extremely simple structure in which the relative position change of the handling depth adjustment device is fed back as a positional displacement of the culm length detector by using a rational holding structure of the culm length detector. Moreover, the present invention aims to provide a handling depth adjustment device for a combine harvester that can accurately detect culm length, and the grain culm conveying device provided between the reaping device and the threshing device is tilted using the rear as a fulcrum. In a combine harvester that adjusts the handling depth of grain culms by adjusting the handling depth of grain culms, an automatic machine that extends integrally from the culm length conveying device and tilts integrally around the rear tilting fulcrum is installed in the ear tip conveying path forward of the tilting fulcrum. A culm length detector of the handling depth adjustment device is provided, and the culm length detector is configured to detect the tip of the grain culm in a tilted posture leaning lightly on the canopy guide plate with a touch piece facing from the side in the direction of the culm. At the same time, a guide rod is provided immediately below the tentacle to guide the grain culms to be conveyed from the upper side toward the tentacle.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a machine base equipped with a traveling device 2, on which a threshing device 3 is mounted, and a reaping support frame that can be tilted up and down with a support shaft 4 is mounted on the front part. The rear part of the reaping support frame 5 is pivotally supported, and the front part of the reaping support frame 5 has a cutting blade 6, a grain culm combing frame 7,
A reaping device 8 consisting of a transverse conveying belt is installed.

Further, there is a grain culm conveying device above the reaping support frame 5 between the reaping device 8 and the threshing device 3, and its rear end is connected to the supply port 9 of the threshing device 3.
The front part is supported by a screw rod 12 which is rotatably supported on the side of the control platform 11 and a movable body 13 screwed thereto so that it can be raised and lowered. A guide frame 14 is provided, and a control motor 15 is attached to the upper end of the screw rod 12.

At the lower stage of the guide frame 14, there is a clamping rod 1.
6a and a conveyor chain 16b, a stock clamping conveyor 17 is constructed, and a guide rod 1
A stem conveyance belt 19 with 8 is installed.
A stand guide plate 20 is provided on the lower surface of the conveyance path constituted by these conveyors, and a cutout window 21 provided at a portion facing the tip conveyance path is provided below the guide frame body 14. A culm length detector 22 mounted with a vertically adjustable bolt 23 faces the upper end.

The contact pieces 24, 24' of this culm length detector 22 are the first
As is clear from the figures and FIG. 2, the cutout window 21
It protrudes from the support guide plate 20 and detects the grain culm and ear tip from the side in the direction of the culm. In addition, a guide rod 25 is attached immediately below the guide rod 25 that protrudes from the side of one of the grain culm combing frames 7, and guides the grain culms to be conveyed from the upper side toward the tentacles 24, 24'. I'm guiding you. A stem detector 26 is provided directly above the stock clamping carrier 17.

Note that the balls 27a and 27 installed inside the moving body 13
a is pressed by springs 27b, 27b and fitted into the threaded groove of the threaded rod 12.

Next, a control circuit consisting of an automatic control device 28 equipped with an automatic manual changeover switch S9 and a handling depth manual operation switch S10 on the top surface, a culm length detector 22, a stem detector 26, a control motor 15, etc. will be explained with reference to FIG. Then, when you want to automatically adjust the handling depth, first set the automatic manual changeover switch S9 to terminal a.
When it is turned to the side, switches S9' and S9'' are turned on simultaneously, and when each part of the machine is operated, the stop switch S8, which is connected to the reaping clutch or the threshing clutch, is turned on.

In this state, the harvested grain culms that have been harvested by the reaping device 8 and transported laterally are carried over to the starting end of the stock clamping carrier 17 and the stem transport belt 19, and are transported later while resting lightly on the support guide plate 20. At this time, the stalk is first detected by the stalk detector 26 and the switch S1 is turned on, and then the height of the front part of the grain holding carrier 17 is determined relative to the length of the grain culm. If the culm length detector 22 is too high and is treated shallowly, the contact pieces 24, 2 of the culm length detector 22
Since the tip of the grain culm does not touch any of 4', in other words, it is not detected, the switch S attached to them is
3 (high level) and S2 (low level) are in the state shown in the diagram, with delay relay La left as is and relay L1
Since the control motor 15 is turned on, the guide frame 1
4. Rotate the screw rod 12 times in the direction of lowering the movable body 13, etc. Contrary to the above, when both the contact pieces 24 and 24' of the culm length detector 22 detect the panicle, switch S2 is turned on and S3 is turned on to the right terminal, so relay L1 is turned off and relay L2 is turned on.
ON, the control motor 15 rotates in the opposite direction, and the screw rod 1 moves in the direction of lifting the front part of the stock clamping conveyor 17.
2 to rotate. When any of the handling depth adjustments described above is performed, when the tip of the tip enters between the contact pieces 24 and 24', switch S2 is turned on, and since S3 is in the position shown, relays L1 and L2 are both turned off and control motor 15 is turned off. Stop.

The above-mentioned automatic adjustment of the handling depth is performed when the grain culm is in a normal state in an upright position, and when the grain culm is lodging or is weak due to a disease such as rice fever, the handling depth is adjusted manually. However, in that case, first change the automatic/manual changeover switch S9 to the switch S9 of the detectors 22, 26.
1, S2, S3 and delay relays La and Lb, automatic control circuit A is turned OFF when the terminal b side of the starting end of manual operation circuit B is connected in parallel with culm length detection circuit A.
At the same time, switches S9' and S9'' are also turned off.

Then, in the manual operation circuit B, terminals e and f are connected to the terminal e connected to the coil of relay L1 and the terminal f connected to the coil of relay L2.
A manually operated switch S10 consisting of a contact piece g that can be switched manually is inserted in each of the switches, and a circuit C connecting the manually operated switch S10 and the automatic changeover switch S9 includes a relay L1, a relay L1, and a switch S9'. Since it is connected to the circuit d which leads to the input terminal of L2, when the manual operation switch S10 is operated to bring the contact piece g to the terminal e, the control motor 15 rotates in the direction of lowering the guide frame 14, and the stock head is held and transported. The front part of the body 17 descends to further grip and transport the stock.

Further, when the contact piece g is connected to the terminal f side, the control motor 15 rotates in the direction of raising the guide frame 14, contrary to the above, and when the contact piece g is positioned between the terminals e and f, the control motor 15 does not rotate and a predetermined handling depth is maintained.

In addition, S4 in the figure is a high-level stop switch, and S5
is a low stop switch.

As described above, the present invention includes a grain culm conveying device provided between the reaping device 8 and the threshing device 3, and a stock clamping conveying body 1 consisting of a clamping rod 16a and a conveying chain 16b.
7, a stalk conveying belt 19 with a guide rod 18 on its upper stage, and a canopy guide plate 20 provided on the lower surface of the conveying path constituted by these conveying bodies. Support point 10 at the rear
In a combine harvester that adjusts the depth of handling of grain culms by tilting the grain culm, the grain culm conveying device integrally extends from the grain culm conveying device to the tip conveying path forward of the tilting fulcrum 10 and is centered around the rear tilting fulcrum 10. A culm length detector 22, which is an automatic handling depth adjustment device that tilts integrally, is provided, and the culm length detector 22 faces the tip of the grain culm in a tilted posture leaning lightly on the culm guide plate 20 from the side in the direction of the culm. Immediately below the tentacles 24, 24', the grain culms being conveyed are detected by the tentacles 24, 24' from the upper side.
4, 24', so even if the handling depth is changed, the transfer position between the grain culm conveyance device and the threshing device conveyance device remains approximately constant. Not only can good conveyance be achieved, but also the culm length detector 22 is extended and tilted integrally with the grain culm conveying device in the ear tip conveying path in front of the tilting fulcrum 10 of the grain culm conveying device. It does not require a special feedback device, can be installed very easily, and does not cause grain shedding due to changes in the relative position between the culm length detector 22 and the grain culm conveying device.

In addition, since the culm length detector 22 detects the tip of the grain culm in an inclined position leaning lightly on the canopy guide plate 20 with the touch pieces 24, 24' facing from the side in the direction of the culm, Tentacles 24, 2 with the tips of the ears facing from the side toward the culm, which have been transported in an inclined position with less resistance and less chance of accumulating straw debris.
4', and accurate culm length can be determined.

In addition, a guide rod 25 was provided immediately below the tentacles 24, 24' to guide the grain culms being conveyed from the upper side toward the tentacles 24, 24'. The guide rod 25 also restricts the tip of the grain culm that is separating outward from the cane guide plate 20 and coming off the ear conveyance path.
4' for reliable guidance and detection, and more accurate culm length detection allows for appropriate handling depth adjustment.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of a combine harvester, Fig. 2 is a sectional view of the handling depth adjustment section, Fig. 3 is a sectional view of the lifting operation section, and Fig. 4
The figure is a circuit diagram. 3... Threshing device, 8... Reaping device, 10... Support shaft, 17... Stock head clamping conveyor, 19... Stem conveyor belt, 20... Lean guide plate, 22... Culm length detector,
24, 24'... tentacle, 25... guide rod.

Claims (1)

[Claims] 1 The grain culm transport device provided between the reaping device 8 and the threshing device 3 is connected to a stock clamping transport body 17 consisting of a clamping rod 16a and a transport chain 16b, and a stem transport belt having a guide rod 18 on its upper stage. 19, and a leaning guide plate 20 provided on the lower surface of the conveyance path constituted by these conveyors, and this grain culm conveying device is tilted with the rear as the fulcrum 10 to adjust the handling depth of the grain culms. In the combine harvester configured to adjust the depth, an automatic handling depth adjustment device extends integrally from the grain culm conveying device to the grain tip conveying path ahead of the tilting fulcrum 10 and tilts integrally around the rear tilting fulcrum 10. A culm length detector 22 is provided, and the culm length detector 2
2 is a tentacle 24 that exposes the tip of the grain culm in a tilted position slightly leaning on the support guide plate 20 from the side in the direction of the culm;
24', and a guide rod 25 is provided immediately below the tentacles 24, 24' for guiding the grain culms to be conveyed from the upper side toward the tentacles 24, 24'. A handling depth adjustment device for a combine harvester, characterized in that it is also provided.