JPS59198913A - Automatic controller of handling depth in combine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention handles the culm at a shallow handling depth after harvesting by varying the inclination angle of the stock clamping and conveying device installed in the culm conveying path from the reaping device to the threshing device. This invention relates to an automatic length/short culm adjustment device for a combine harvester that appropriately adjusts the culm side or deep handling side.

Conventionally, technology for turning on and off automatic control depending on the layer thickness of the conveying culm in a stock clamping and conveying device (for example, Utility Model No. 48-6
1029), but since automatic control was started when a predetermined layer thickness was detected, when this technology was applied to automatic handling depth control, fluctuations in the layer thickness of the conveyed culm could be avoided. As the automatic handling depth control is turned on and off by ), the problem arises that the automatic handling depth control does not operate due to insufficient layer thickness of the conveyed culm after reaping.

Furthermore, as shown in the above-mentioned prior art and Japanese Utility Model Application Publication No. 51-2530, when the stock clamping and conveying device is provided with a switch for detecting the conveying culm, when the position of the conveying device is adjusted by automatic handling depth control, In accordance with the handling depth control, the position where the conveying culm is held by the conveying device moves from the culm base side to the tip side, and the contact position of the switch with respect to the conveying culm changes, and the culm base is clamped. When the culm is short (when adjusting the handling depth)
The above switch is activated by the hard +1- element, but since the tip side is softer than the culm side, when handling long culms (when adjusting shallow handling), the soft tip side is set to ifI.
In order to prevent this, it is necessary to move the mounting position of the switch according to the handling depth control, or to apply a special "coil" to the switch. There were problems in that the operation was unstable and the structure was complicated.

The present invention eliminates the conventional problems as described above, and enables stable automatic handling depth control regardless of the layer thickness of the conveying culm and the adjustment position of the stock clamping and conveying device due to changes in long and short strokes. The object of the present invention is to provide a device for automatically adjusting the handling depth of a combine harvester.

Embodiments of the invention will now be described in detail with reference to the drawings.

Figure 1 is a side view of the combine, Figure 2 is its top view,
In the figure, (1) is the machine base, (2) is a pair of running rollers (3)
(3) is equipped on both sides of the truck frame; (4) rotates the machine (1) downward with respect to the truck frame (2) when turning the machine (1), etc. The pivot shaft (5) that can support the machine (
1) A lowering cylinder whose front part is held upward, (6) is a threshing device mounted on the machine base (1), and inside it is a threshing device that holds the handling cylinder (7) above the machine base (1). ) is mounted on an axis along the front-rear direction.

(8) is a reaping device for multi-row mowing, with multiple grass dividing boards (9)
... and a cutting blade (10).

(11) is a shell culm pinching transfer device, and this device (11) is composed of a feed chain (12) and a pinching rod (13).

In addition, (14) is the driver's seat, (15) is the driving operation section, and (16) is the driver's seat.
) is a grain pedestal facing upwards from the grain-lifting conveyor device (17) for increasing grains, (18) is a straw cutting device detachably installed at the rear of the threshing device (6), and (18) is a The straw removal chain (20) extends from the end of the feed chain (12) to the upper part of the cutter of the straw removal cutting device (18), and is a cover of the chain (18). Furthermore, (21) is the engine mounted on the machine base (1) J2, (22) is the drive sprocket for the roller (3) that runs, and (23) is the roller that runs together with the subroken 1-(22). 3)
(24) is a carrier roller that slides into contact with the -F-, inner surface of the running roller (3); (25)... is a carrier roller that slides on the lower inner surface of the running roller (3); A plurality of track rollers are brought into contact with each other. Furthermore (2
6) is a dust suction/exhaust device with a suction port facing the sorting air path;
(27) is an inlet supply plate provided at the lower part of the handling chamber of the thresher (6), and (28) is a handling barrel pulley cover.

Next, a cutting blade (10”) in the cutting device (8)
, J: A scraping drum (29)... is installed in the ancient capital, and this scraping drum (28)... rotates a star foil (30)... that scrapes the root side of the culm. Equipped freely. Each star foil (30) is equipped in correspondence with the left and right shell culm lifting devices (31) (32), and the lower conveyor chain (33) (
33), and is configured to clamp and convey the culm base of the shell culm.

Furthermore, left and right upper conveying devices (34) (34) for pinching and conveying the tip side of the culm are extended above the left and right lower conveying chains (33) (33).
) with the conveyor tines (34a) protruding toward the shell culm conveyance path, the partial conveyor device (34) (34
) are covered with the upper transport left and right covers (35) (3B), respectively. Therefore, the partial conveyance device (34) (34
), the starting end of a vertical conveying device (37), which is a plant clamping and conveying device whose handling depth can be adjusted, is exposed, and its terminal end extends to the starting end of the feed chain (12), and is used for reaping. The feed chain (12) from the device (8) to the threshing device (6)
) The conveying device (37) is disposed in the shell culm conveying path.

Additionally, ear tip sensors (38) (39) for detecting the reaped grain culm length are installed on the inner surface of the handling cylinder boeli cover (28), and these sensors (38) (39) detect the grain culm length inside the handling chamber (40) (see Figure 3). (41) detects the handling depth of the culm inserted into the vertical conveyance device (37) and changes the inclination angle of the vertical conveyance device (37) via a hydraulic circuit to be described later.
7) is a detection device installed at an intermediate position to detect the conveyed shell culm.

Next, as shown in FIG. 3, the vertical conveyance device (37) connects the first connecting rod (42) to the intermediate pivot portion (37a) and the second connecting rod (43) to the lower end pivot portion (37b). Continuously installed, this 2nd I! I! The middle part of the rod (43) is connected to a piston rod (45) of a hydraulic cylinder (44) which is a handling depth adjustment member.

[The chamber (44a) on one side of the 111th cylinder (44) across the piston is connected to the tank (44a) via the hydraulic pump (4B).
7), and the other side chamber (44b) is directly connected to the tank (47).
It communicates with M cylinder (44) and tank (4
7), there is a 4-boat type electrohydraulic switching valve (50) which is a handling depth adjustment member having solenoids (48) and (49).
) has been established.

Further, a relief valve (
51) is connected.

On the other hand, as shown in Fig. 4, a battery (5
2) is connected to a select switch (53) for automatic/manual switching, and the detection device (41), sensor (38) and solenoid (4) are connected to the output side of this select switch (53).
8), and at the same time, a series circuit of the tip sensor (38) and the solenoid (49) is connected to the output side of the select switch (53) so as to be parallel to the series circuit, and A manual switch (54) (55) is installed between the battery (52) and each solenoid (48) (49).
) are connected to each other.

One of the manual switches (54) and (55) is for deep handling, and the other switch (55) is for wavy handling.

Further, between the battery (52) and the ground, there is a culm detection switch (56) and a delay circuit (5) which is a speed control member.
7) and the first relay (58) are connected in series. As shown in FIG. 5, the culm detection switch (56) is a culm sensor (61) pivotally connected to the reaping frame (58) in front of the cutting blade (lO) via a pivot pin (60). It is configured to be turned on when the insertion of the culm is detected and the culm moves in the direction of the imaginary line in the figure against the spring (62). Install the culm sensor (61). Further, the delay time by the delay circuit (57) is determined from the time when the culm detection switch (58) is turned on to when the culm at the time of starting mowing is detected by each of the tip sensors (38).
The time is set in advance to be slightly longer than the time required to pass through (39).

Furthermore, a series circuit consisting of a pulse generation circuit (63), which is a speed control member that repeatedly outputs pulses of a predetermined duration, and a second relay (64) is connected between the battery (52) and the ground. .

Moreover, the normally closed contact (58b) of the first relay (58) is connected between the automatic handling depth control circuit (65) including the sensors (38) (39) and the detection device (41) and the select switch (53). ) is connected, and an AND circuit (66) is connected in parallel with this contact (58b), and the conveying device ( 37), and a shell culm detection switch (56) which is activated by the shell culm detection of the shell culm sensor (61) is inserted between the battery (52) and the control circuit (65). Sensor (61)
The system is configured to start automatic handling depth control based on the detection of the shell culm.

In S et al., the AND circuit (6G) connects each of the relays (58
) (84), normally closed contacts (58a) (84a) are connected in series, and the outputs of the delay circuit (57) and pulse generation circuit (63) are logically output, and the delay circuit (57)
This is to make the response speed of the vertical conveyance device (37) slower than that at the start of mowing after the R extension time path.

Furthermore, until the sensor (56) returns off and the detection device (41) returns off at the end of mowing, the vertical conveyance device (37)
The response speed is made faster at the end of mowing as well as at the beginning of mowing compared to during steady mowing, and the sensor (38) detects the length of the harvested grain culm to be threshed, and the sensor (38)
(39) Hydraulic cylinder whose operation is controlled by output (44
) and a hydraulic switching valve (50) to the hydraulic cylinder (4).
4) are configured to be interlocked and connected via a delay circuit (57) for switching the adjustment speed and a pulse generation circuit (63).

The present invention is constructed as described above, and when harvesting is performed using a combine harvester, the select switch (53) is switched to the automatic operation side, and after turning it on, the sensor (61) detects the culm. The culm detection switch (56) is turned on by its sensor (81), and then the detection device (41) detects the culm of the culm being lifted and conveyed by the vertical conveyance device (37). When the source is detected, power is applied to the solenoid (4B) via each element (53), (58b), (41), and (39).
8), the switching valve (5o) was switched, and hydraulic oil from the hydraulic pump (46) was supplied to the chamber (44b) on the other side of the cylinder (44) and connected to the second connecting rod (43). The piston rod (45) moves 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 culm transported by the vertical transport device (37) is transferred from the inlet supply plate (27) and the handling port to the handling chamber (40).
The culm is inserted into each tip sensor (38) (
3B), each of the sensors (38) and (39) operates to energize one solenoid (48). As a result, the electromagnetic switching valve (50) is switched, and the hydraulic pressure from the hydraulic pump (46) is supplied to the - side chamber (44a) of the cylinder (44), and the piston rod connected to the second connecting rod (43) is (45) is pushed up in the direction indicated by the arrow in FIG. 3, and the vertical conveyance device (37) is swung in the direction of time 1 (toward the pouring side) to make its inclination angle gentle. At this time, for example, if the culm is in contact with only one normally closed sensor (39), both sensors (38) and (39) are off, so the current is applied to each solenoid (48) and (49). are both cut off, and the vertical conveying device (37) stops its swinging while maintaining the tips of the culms in the middle of the mounting positions of the respective sensors (38) and (39).

In other words, when the delay time caused by the delay circuit (57) has not yet elapsed at the start of mowing, the power supply is turned off by the select switch (53).
) and the relay contact (58b) to the automatic handling depth control circuit (65), so the response speed of the vertical conveyance device (37) can be made faster than that during steady reaping, which will be described later. Preventing clogging of shell culm in the handling room (40)11
- It is something that can be done.

On the other hand, when the delay time due to the delay circuit (57) has elapsed,
The first relay (58) is energized and its contacts (58a) (
58b) is switched, and the control circuit (65) is activated by the OR output of the contact (e4a) of the second relay (64) which is intermittently excited by the output of the pulse generating circuit (63) and the contact (58a). Power will be applied intermittently. Therefore, during steady reaping after the delay time has elapsed, the solenoids (43) and (49) are intermittently excited, and the swing speed or response speed of the vertical conveyance device (37) is slower than that at the start of mowing. 2 The device (37) will swing gently. Therefore, it is possible to prevent the hunting phenomenon during steady cutting, and to perform automatic automatic adjustment of the handling depth.

Furthermore, as is clear from FIG. 4, when the cutting blade (10) finishes cutting the grain rod, the culm disappears, the sensor (61) returns, and the culm detection switch (56) returns to OFF. 41) In the same state as when starting mowing, the processing depth adjustment speed by on/off control of each sensor (3B) (3!3) becomes faster again, and the culm supply amount decreases unevenly. Even if the sensors (38) and (39) tend to malfunction, the adjustment speed is fast, so the malfunction can be quickly corrected.
This enables automatic adjustment of the handling depth even at the end of mowing, and when the cutter culm supply vehicle and the end of mowing with significant changes in culm length, etc., the hydraulic cylinder (44) is connected to each sensor (38). While quickly responding to the detection output of (39), the culm detection switch (56) and the detection device (
41) is turned off, the tip sensor (3B) (39) is returned, and automatic handling depth control is stopped.
If b) is omitted, automatic depth control is stopped by turning off the switch (56).

Further, in FIG. 4, when a pulse generating circuit (63) equipped with a pulse adjuster (63a) is used, the period of the pulse wave output from the circuit (63), its wavelength, etc. can be controlled by the pulse adjuster (83a). ), each solenoid (48) (4) by the pulse output of the circuit (63)
9), the on-operation time, that is, the response speed of the hydraulic cylinder (44), can be arbitrarily changed during the entire harvesting operation, including the start of cutting the culm, the steady cutting, and the end of cutting.

And the select switch (53) and the AND circuit (
When a manual speed changeover switch (67) is connected in parallel to the switch (66), the switch (67) The sensor (58) can give priority to the operation and increase the response speed of the hydraulic cylinder (44) at the start of mowing and at the end of mowing.
), the response speed of the hydraulic cylinder (44) can be automatically controlled, while the pulse regulator (83
a) or by using a switch (67), the response speed can be controlled steplessly or steplessly by manual operation.

As is clear from the following 11 embodiments, the present invention provides a reaping device (
8) to the feed chain (12) of the threshing device (6), a plant clamping and conveying device such as a vertical conveying device (37) is installed in the entire culm conveying path, and a head tip sensor is installed in the middle of the conveying path. (38) 1iFj by sensing the tip of (39)
In a combine harvester provided with an automatic handling depth control circuit (65) for adjusting the position of the conveying device (37), the conveying device (37) is
37) The culm sensor (61) is attached to the reaping device (8) in front of the
At the same time, the shell culm detection switch (56), which is activated by the shell culm detection of the shell culm sensor (61), is connected to the battery (5).
It is inserted between the power supply circuit such as 2) and the control circuit (65), and is configured to start automatic handling depth control based on the detection of the shell culm by the IFi shell culm sensor (61). In comparison, the automatic handling depth control circuit (65) can be turned on and off by the shell culm detection switch (56) without being affected by variations in the layer thickness y of the conveyed shell culm, and By always bringing the shell culm sensor (61) into contact with this approximately constant position, the shell culm detection switch (5G) can be activated more reliably than before, resulting in stable automatic handling as a whole. The depth can be controlled, and the structure is extremely functional compared to conventional structures, making it safer to handle.

[Brief explanation of drawings]

FIG. 1 is a side view of a combine harvester showing one embodiment of the present invention;
Figure 2 is a plan view, Figure 3 is a depth adjustment system diagram, and Figure 4 is a diagram of the handling depth adjustment system.
The figure is an electric circuit diagram thereof, and FIG. 5 is a partial plan view of the main part. (6)... Threshing device (8)... Reaping device (12)... Feed chain (37)... Vertical conveyance device (stock clamping conveyance device) (3
8) (39)... Tip sensor (52)... Battery (power supply circuit) (56)...
Culm detection switch (61)...Culm sensor (65)...Automatic handling depth control circuit Applicant: Yanmar Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] An automatic handling depth system in which a plant clamping and conveying device is disposed in the husk conveying path from the reaping device to the feed chain of the threshing device, and the position of the conveying device is adjusted by sensing the tip of the ear by a head tip sensor provided in the middle of the conveying path. In a combine harvester equipped with a control circuit, when a shell culm sensor is attached to the reaping device on the ifI side of the conveyor, a grain +7 detection switch activated by the shell culm detection of the shell culm sensor is connected to the power supply circuit and the control circuit. An automatic handling depth adjustment device for a combine harvester, characterized in that it is inserted between the culm sensor and starts automatic handling depth control based on the detection of the culm by the culm sensor.