JPS6352846B2 - - Google Patents

Description

Detailed Description of the Invention "Industrial Application Field" The present invention is a method for handling grain culms after reaping at a shallow handling depth by varying the inclination angle of a grain culm conveying device such as a vertical conveying device or a lower post-conveying device. This invention relates to an automatic length/short culm adjustment device for a combine harvester that appropriately adjusts the culm to the picking side or the deep handling side.

``Prior Art'' Generally, in a combine harvester configured to vary the inclination angle of the vertical conveying device using this type of automatic adjustment device, the vertical conveying device is positioned on the deep handling side at the beginning of mowing, and the combine operation is performed. It is common practice to prevent grain culms from being left untreated due to unhandled handling drums.

"Problems to be Solved by the Invention" However, when the traveling speed of the combine is relatively high and the vertical conveyance device is located on the deep handling side, grain culms become clogged in the handling barrel at the beginning of mowing. There was a risk that this would occur.

In order to improve this problem, if the response speed of the vertical conveyance device controlled by the tip detection sensor that detects the culm length is set to a high speed in advance, this clogging phenomenon can be prevented, but on the other hand, the hunting phenomenon may occur during steady harvesting. However, there was a drawback that a good automatic adjustment device for long and short culms could not be implemented.

In addition, the amount of grain culm harvested per unit time increases in proportion to the traveling speed of the combine machine, so when work is started at high speed, the threshing load tends to increase at the beginning of mowing, making it easier to prevent culm clogging. There were safety issues such as the inability to do so.

"Means for Solving the Problems" However, the present invention provides an automatic length and short culm adjustment device that displaces a grain culm conveying device based on the output of a head sensor that detects the culm length of a threshing culm. A start sensor is installed to detect the start of harvesting work,
Based on the output of the starting sensor, the length and short culm adjustment speed is made faster at a certain time at the start of mowing, and slowed down after a certain time has elapsed from the start of mowing, and the length and short culm adjustment speed is slowed down at a certain time after the grain culm is detected by the starting sensor. The present invention is characterized in that the delay time by the delay circuit for this purpose is set to be longer than the time it takes for the grain culm to reach from the starting sensor to the ear tip sensor.

``Effect'' Therefore, at the beginning of mowing, the response speed of the grain culm conveying device returning from the deep handling position to the shallow handling side is increased to prevent the phenomenon of grain culm clogging in the handling drum at the beginning of the reaping operation. This can be prevented in advance, and during regular reaping after a certain period of time has elapsed since the start of mowing, the response speed of the grain culm conveying device is slowed down to prevent the unnecessary hunting phenomenon of this device, and as a result, it can accurately correspond to the culm length. The automatic adjustment can be performed well and the threshing performance can be improved, and the adjustment operation can also be carried out by detecting the grain culm itself of the starting sensor installed in the conveyance path of the reaped grain culm, such as a reaping frame. It is reliable because it is reliable, and the delay time due to the start sensor is almost constant, and the time it takes for the grain culm to reach the tip sensor from the start sensor becomes shorter as the traveling speed of the combine machine increases. , the time during which the grain culm conveying device is driven to the shallow handling side at high speed at the start of mowing (the difference between the delay time until the length and shortness of the culm is adjusted at low speed and the time when the grain culm reaches the tip sensor) is longer than when running at high speed. When traveling at high speeds, the amount of grain culms harvested per unit time increases and the threshing load also increases, but compared to when running at low speeds, the grain culm conveying device is moved to the shallow handling side by the time the grains reach the ear tip sensor. By doing so, it is possible to prevent an increase in the threshing load at the beginning of mowing and the clogging of the threshing culm, and it can be handled more safely than before.

"Example" Hereinafter, in order to further deepen the understanding of the present invention, the present invention will be described in detail based on the illustrated example. FIG. 1 is a side view of a combine harvester, FIG. 2 is a plan view thereof, and 1 in the figure is a The machine base 2 is a truck frame equipped with a pair of traveling crawlers 3, 3 on both sides, and 4 is a machine base 1 that can be rotated vertically with respect to the track frame 2 when the machine base 1 is turned. 5 is a lifting cylinder that lifts the front part of the machine 1 upward using the pivot shaft 4 as a fulcrum; 6 is a threshing machine mounted on the machine 1; The handling cylinder 7 is mounted on a shaft along the longitudinal direction of the machine base 1.

8 is a reaping device for multi-row mowing, and a plurality of grass dividing boards 9
... and a cutting blade 10.

Reference numeral 11 denotes a grain culm transfer device, and this device 11 is composed of a feed chain 12 and a ramming rod 13, and is installed along the handling opening (not shown) of the threshing machine 6. .

Further, 14 is a driver's seat, 15 is a driving operation section, and 16 is a driver's seat.
Reference numeral 18 indicates a grain pedestal on which a grain frying conveyor device 17 for taking out fine grains from the first opening faces upward, 18 a straw cutting device detachably installed at the rear of the threshing machine 6, and 19 a flap. A straw removal chain 20 extending from the end of the eed chain 12 to the upper part of the cutter of the straw removal cutting device 18 is a cover of the chain 19. Furthermore, 21 is an engine mounted on the machine base 1, and 22 is a drive sprocket for the traveling crawler 3, which is connected to a traveling transmission (not shown). Further, 23 is an idle roller that supports the end of the traveling crawler 3 together with the sprocket 22, 24 is a carrier roller that comes into sliding contact with the upper inner surface of the traveling crawler 3, and 25... is a sliding roller that comes into sliding contact with the lower inner surface of the traveling crawler 3. There are multiple truck crawlers. Furthermore, 26 is a dust suction/exhaust device whose suction port is opened toward the sorting air passage, 27 is an inlet supply plate provided at the lower part of the handling chamber of the threshing machine 6, and 28 is a handling barrel pulley cover.

Next, a raking drum 29 is installed above the cutting blade 10 in the reaping device 8, and a star wheel 30 for raking the root side of the grain culm is rotatably driven on the raking drum 29. Equipped freely. Each of these star wheels 30 is equipped to correspond to the left and right grain culm lifting devices 31, 32, and a sprocket (coaxially) for driving the lower conveyance chains 33, 33 is installed coaxially with these star wheels 30. (not shown) are provided to constitute the left and right lower conveying devices, which are configured to clamp and convey the culm base of the grain culm.

Furthermore, the upper portions of the left and right lower conveyance devices are provided with left and right upper conveyance devices 3 that clamp and convey the tip side of the grain culm.
4, 34 are extended and the conveying tines 34a of these devices 34, 34 are projected toward the grain culm conveying path, and the upper conveying devices 34, 34 are connected to the upper conveying left cover 35 and the upper conveying right cover 35. cover 3
6 covers each. The starting end of a vertical conveying device 37, which is a grain culm conveying device whose length can be adjusted, is facing behind the upper conveying devices 34, 34, and its terminal end is connected to the starting end of the feed chain 12. It extends towards the department.

Additionally, ear tip sensors 38 and 39 are attached to the inner surface of the handling barrel pulley cover 28 to detect the length of the grain culm to be threshed, and these sensors 38 and 39 are inserted into the handling chamber 40 (see Fig. 3). The handling depth of the grain culms is detected and the inclination angle of the vertical conveyance device 37 is varied via a hydraulic circuit which will be described in detail later. Note that 41 is a detection device provided at an intermediate position of the vertical conveyance device 37 to detect the culm base of the grain culm.

Next, the long and short culm automatic adjustment mechanism will be described in detail based on FIG. A rod 43 is provided in series, and the intermediate portion of the second rod 43 is connected to a piston rod 45 of a hydraulic cylinder 44 which is a length adjustment member.

A chamber 44a on one side of the cylinder 44 across the piston is connected to a tank 47 via a hydraulic pump 46.
Further, the chamber 44b on the other side is directly connected to the tank 47. However, between the hydraulic cylinder 44 and the tank 47, there is provided a 4-port electrohydraulic switching valve 50 having solenoids 48 and 49, which is a length adjustment member. Further, a relief valve 51 is connected to the discharge side of the hydraulic pump 46.

On the other hand, the electric circuit accompanying this hydraulic circuit is the fourth
The wires are connected as shown in the figure. That is, while a select switch 53 for automatic/manual switching is connected to the battery 52, this select switch 53
A series circuit of the detection device 41, the sensor 39, and the solenoid 48 is connected to the output side of the select switch 53, and a series circuit of the tip detection sensor 38 and the solenoid 49 is connected to the output side of the select switch 53 in parallel with the series circuit. In addition, manual switches 54 and 55 are connected between the battery 52 and each solenoid 48 and 49, respectively.

Here, among the manual switches 54 and 55, one switch 54 is for deep handling, and the other switch 55 is for shallow handling.

Further, a series circuit consisting of a limit switch 56, a delay circuit 57 serving as a speed control member, and a first relay 58 is connected between the battery 52 and the ground. Here, the limit switch 56 is the fifth limit switch.
As shown in the figure, the cutting frame 5 in front of the cutting blade 10
A grain culm sensor 61, which is a starting sensor pivotally connected to the grain culm 9 via a pivot pin 60, detects the insertion of the grain culm, and the spring 6
2, it is configured to turn on when it moves in the direction of the imaginary line in the figure. Further, the delay time by the delay circuit 57 is set in advance to be slightly longer than the time from the time when the limit switch 56 is turned on to the time when the grain culm passes each of the ear tip sensors 38 and 39 at the beginning of mowing. The delay time of the delay circuit 57 caused by the grain culm sensor 61 is set to T (approximately constant), and the grain culm is detected by the grain culm sensor 61.
Letting t be the time from the tip to the tip sensor 38, when the traveling speed of the aircraft is fast, t is longer than when it is slow.
becomes smaller, and the time (Tt) during which the vertical conveyance device 37 is driven at high speed to the shallow handling side becomes longer when traveling at high speed. Therefore, when traveling at high speed, the amount of harvested grain culm per unit time is relatively large. As a result, the threshing load also increases,
When traveling at high speed, T-t becomes relatively large as described above, and the vertical conveyance device 37 is configured to be moved to a shallower handling side at the start of mowing compared to when traveling at low speed.

Further, between the battery 52 and the ground, a pulse generation circuit 63 and a second relay 64, which are speed control members that repeatedly output pulses of a predetermined duration, are connected.
A series circuit with is connected.

Moreover, the first relay 58 described above is connected between the long and short culm adjustment circuit 65 including the respective ear tip sensors 38 and 39 and the detection device 41 and the select switch 53.
This contact 58b is connected to the normally closed contact 58b.
An AND circuit 66 is connected in parallel with 8b. This AND circuit 66 is constructed by connecting the normally open contacts 58a and 64a of the relays 58 and 64 in series, and includes a delay circuit 57 and a pulse generation circuit 6.
This is to logically output the output of 3 and to make the response speed of the vertical conveyance device 37 slower than that at the start of mowing after the delay time by the delay circuit 57 has elapsed.
Further, until the limit switch 56 returns to OFF at the end of mowing and the detection device 41 returns to OFF, the response speed of the vertical conveyance device 37 is made faster at the end of mowing as well as at the start of mowing, compared to during steady mowing. Spear tip sensors 38 and 39 detect the length of the harvested grain culm to be threshed
A hydraulic cylinder 44 and a hydraulic switching valve 50 whose operation is controlled by the outputs of the sensors 38 and 39 are interlocked and connected via a delay circuit 57 and a pulse generation circuit 63 which switch the adjustment speed of the hydraulic cylinder 44. Configure.

This embodiment is configured as described above, and when harvesting is performed using a combine harvester, the select switch 53 is switched to the automatic operation side and turned on, and then the grain culm sensor 61 detects the grain culm. Then, when the detection device 41 detects the culm base of the grain culm being lifted and conveyed by the vertical conveyance device 37, power is applied to the solenoid 48 via each element 53, 58b, 41, 39. Therefore, when the solenoid 48 is driven, the switching valve 50 is switched, and the hydraulic oil from the hydraulic pump 46 is supplied to the chamber 44b on the other side of the cylinder 44, and the piston rod 45 connected to the second connecting rod 43 is operated. Move in the direction of arrow a in FIG. As a result, the vertical conveyance device 37 swings counterclockwise (deep handling side), and its inclination angle becomes steeper.

Next, the grain culms that have been transported by the vertical transport device 37 are transferred from the inlet supply plate 27 and the handling port to the handling chamber 4.
When this grain culm hits the sensor arm of each of the ear tip sensors 38 and 39, each of these sensors 38 and 39 is switched and energizes one solenoid 49. As a result,
When the electromagnetic switching valve 50 is switched, hydraulic pressure from the hydraulic pump 46 is supplied to the chamber 44a on one side of the cylinder 44, and the piston rod 45 connected to the second connecting rod 43 is supplied.
is pushed up in the direction of arrow b in FIG. 3 to swing the vertical conveyance device 37 clockwise (shallow handling side) to make its inclination angle gentler. At this time, for example, if the grain culm is in contact with only one normally closed sensor 39, both sensors 38 and 39 are off.
The current to each of the solenoids 48 and 49 is then cut off, and the vertical conveyance device 37 stops swinging while maintaining the tip of the grain culm, that is, the tip, in the middle of the mounting position of each sensor 38 and 39.

In short, at the start of mowing when the delay time set by the delay circuit 57 has not yet elapsed, power is applied to the length/short culm adjustment circuit 65 via the select switch 53 and the relay contact 58b.
The response speed can be made faster than that during steady reaping, which will be described later, and clogging of grain culms in the handling chamber 40 can be prevented.

On the other hand, when the delay time caused by the delay circuit 57 has elapsed, the first relay 58 is energized, and its contacts 58
a and 58b are switched, and the pulse generation circuit 6
Power is intermittently applied to the length/short culm adjustment circuit 65 by the OR output of the contact 64a of the second relay 64, which is intermittently excited by the output of the second relay 64, and the contact 58a. Therefore, during steady reaping after the delay time has elapsed, each solenoid 4
8 and 49 are intermittently excited, the swing speed, that is, the response speed of the vertical conveyance device 37 becomes slower than that at the start of mowing, and the device 37 swings gently. Therefore, it is possible to prevent the hunting phenomenon during steady reaping, and to perform automatic adjustment of the length and length of the culm.

Furthermore, as is clear from FIG. 4, when the cutting blade 10 finishes mowing the grain culm, when the grain culm disappears and the grain culm sensor 61 returns to OFF, the detection device 41 is in the ON state, similar to when the mowing started. , each tip sensor 38,
Even if the length adjustment speed by the on/off control of No. 39 becomes faster again, and the amount of grain supplied to the grain culm decreases unevenly, making each ear tip sensor 38, 39 likely to malfunction, the adjustment speed is fast, so the malfunction will not occur. This allows automatic adjustment of the length and shortness of the culm even at the end of mowing, and when the supply amount of reaped grain culm and changes in culm length are significant, that is, at the beginning and end of mowing, the length and shortness of The hydraulic cylinder 44, which is a culm adjustment member, is made to promptly respond to the detection output of each ear tip sensor 38, 39, and when the supply amount of the reaped grain culm, the culm length, etc. are approximately uniform and stable, that is, during steady reaping, the above-mentioned This causes the hydraulic cylinder 44 to respond slowly.

Furthermore, in FIG. 4, when the pulse generating circuit 63 equipped with the pulse regulator 63a is used, the circuit 63
When the period or wavelength of the pulse wave output from the circuit 63 is changed by the pulse adjuster 63a, the on-operation time of each solenoid 48, 49 due to the pulse output of the circuit 63, that is, the response speed of the hydraulic cylinder 44 can be arbitrarily changed during the entire harvest operation, including at the beginning of cutting the grain culm, at regular cutting, and at the end of cutting. When a manual speed changeover switch 67 is connected in parallel to the select switch 53 and the AND circuit 66, the switch 67 can This allows the response speed of the hydraulic cylinder 44 to be made faster at the start of mowing and at the end of mowing by giving priority to the operation, and by using the limit switch 56, the response speed of the hydraulic cylinder 44 is automatically adjusted. However, by using the pulse regulator 63a or the switch 67, the response speed can be controlled steplessly or stepwise by manual operation.

"Effects of the Invention" As is clear from the above embodiments, the present invention provides an automatic grain length adjustment device that displaces the grain culm conveying device 37 based on the outputs of the head sensors 38 and 39 that detect the culm length of the threshing culm. A start-up sensor 61 is provided which detects the start of harvesting work by detecting the culm, and based on the output of the start-up sensor 61, the speed of adjusting the length and shortness of the culm is made faster for a certain period of time at the start of mowing, and slowed down after a certain period of time has elapsed from the start of mowing. The delay time by the delay circuit 57 for slowing down the length adjustment speed after a certain period of time after the grain culm is detected by the grain culm by the grain culm starting sensor 61 is set to be larger than the time it takes for the grain culm to reach the ear tip sensor 38 from the grain culm starting sensor 61. At the beginning of harvesting, the return response speed of the grain culm conveying device 37 from the deep handling position to the shallow handling side is increased to prevent the phenomenon of grain culm clogging in the handling barrel at the beginning of the reaping operation. In addition, during steady reaping after a certain period of time has elapsed from the start of mowing, the response speed of the grain culm conveying device 37 can be slowed down to prevent unnecessary hunting of this device 37, and as a result, the culm length can be reduced. Accurately matched automatic adjustment can be performed satisfactorily and threshing performance can be improved, and the adjustment operation can also be carried out using the grain culm of the starting sensor 61 provided in the conveyance path of the reaped grain culm, such as the reaping frame 59. It is reliable because it is performed by its own detection operation, and the delay time by the start sensor 61 is approximately constant, and the time for the grain culm to reach the tip sensor 38 from the start sensor 61 depends on the traveling speed of the combine machine. The shorter the grain culm is, the smaller the grain becomes. )
becomes larger when traveling at high speeds, and when traveling at high speeds, the amount of grain culms reaped per unit time increases and the threshing load also increases, but compared to when traveling at low speeds, the amount of grain culms that are removed by the ear tip sensor 3 increases.
8, the grain culm conveying device 37 is moved to the shallow handling side, which prevents an increase in the threshing load at the start of mowing and clogging of the threshing culm, making it possible to handle the grain more safely than before. It has the following effects:

[Brief explanation of drawings]

Fig. 1 is a side view of a combine equipped with a long and short culm automatic adjustment device according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a system diagram of the long and short culm automatic adjustment mechanism, and Fig. 4 is a system diagram of the long and short culm automatic adjustment mechanism.
The figure is an electric circuit diagram thereof, and FIG. 5 is a partial plan view showing the mounting structure of the sensor 61 and limit switch 56. 37...Vertical conveyance device (grain culm conveyance device), 38,
39... Spear tip sensor, 57... Delay circuit, 61...
...Grain culm sensor (starting sensor).

Claims (1)

[Claims] 1 Spike tip sensor 38, 3 that detects the culm length of the threshing culm
In the automatic length adjustment device for displacing the grain culm conveying device 37 by the output of the grain culm 9, a start sensor 61 is provided which detects the start of harvesting work by detecting the grain culm, and the length adjustment is performed based on the output of the start sensor 61. A delay time is set by a delay circuit 57 to make the speed faster for a certain period of time at the start of mowing and slow after a certain period of time has elapsed from the start of mowing, and to slow down the length/shortness adjustment speed after a certain period of time after the grain culm is detected by the starting sensor 61. ,
An automatic length and short culm adjustment device for a combine harvester, characterized in that the time taken for the grain culm to reach from the starting sensor 61 to the ear tip sensor 38 is set to be longer.