JP2000166349A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine harvester simplified in scheme for subjecting a reaping unit to vertical movement interlockingly with the operation of an autoset switch or autolift switch. SOLUTION: This combine harvester has a lower limit detective means for detecting the fact that the lower end of a reaping unit is abutted on the field surface, an autoset switch 122 for lowering the reaping unit to a specified descending position, and a control unit for controlling a lift mechanism; wherein the control unit works as follows: the reaping unit is allowed to descend once interlockingly with the operation of the autoset switch 122 until detecting the fact by the lower limit detective means that the lower end of a reaping unit is abutted on the field surface, thereafter the reaping unit is raised until detecting the fact by the lower limit detective means that the lower end of a reaping unit is not abutted on the field surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a combine.

[0002]

2. Description of the Related Art As a conventional combine, a traveling section is provided at a lower portion of a body frame, and a cutting section is provided at a front end of the body frame so as to be able to move up and down, and a threshing section is provided immediately after the cutting section. On the other hand, there is a known configuration in which an operating unit is disposed on the front right side of the body frame, and the truss cut by the cutting unit is threshed by the threshing unit while traveling in a field.

[0003] Such a combine is provided at the lower end of a reaper.
While an ultrasonic sensor is provided as height detecting means for detecting the height from the field scene to the lower end of the reaping unit, a rotation for detecting the rotation angle of the reaping unit is provided at the vertical rotation unit of the reaping unit. A potentiometer as a moving angle detecting means is provided, and furthermore, in the operation unit, an automatic set switch for lowering the cutting unit to a predetermined height at the time of cutting work of the grain rod, and at the time of entering a field or leaving the field. An automatic lift switch for raising the mowing part to a predetermined height is provided.

When entering the field, the auto-lift switch is operated to raise the mowing section until the potentiometer detects that the mowing section has risen to a predetermined height. In order to prevent collision, and at the time of grain stick cutting work, by operating the automatic set switch, the cutting unit is lowered until the ultrasonic sensor detects that the cutting unit has been lowered to the predetermined height, The reaping unit cuts the grain rods, and when leaving the field, the auto-lift switch is again operated to raise the reaping unit to a predetermined height, so that the reaping unit collides with the ridge on the periphery of the field. Had been prevented.

[0005]

However, in the above-mentioned conventional combine, since the ultrasonic sensor is provided at the lower end of the cutting unit, mud in the field adheres to the ultrasonic sensor, and There was a possibility that the height from the field scene to the lower end of the mowing part could not be accurately detected by the acoustic wave sensor.

In addition, since the potentiometer is disposed on the rotating portion of the mowing portion, a mounting error of the potentiometer and a time error due to repeated use of the potentiometer occur. In this case, too, the height of the mowing portion is accurately adjusted. Could not be detected.

[0007]

Therefore, according to the present invention, a traveling section is provided at a lower portion of the body frame, and a mowing section is provided at a front end of the body frame so as to be able to move up and down via a lifting mechanism. In the combine which is arranged, a lower limit detecting means for detecting that the lower end of the mowing portion has contacted the field scene, an automatic set switch for lowering the mowing portion to a predetermined lowering position, and a lifting mechanism A raising and lowering control unit for controlling, wherein the raising and lowering control unit operates in conjunction with the operation of the auto set switch until the lower limit detecting unit detects that the lower end of the reaping unit has contacted the field scene. Is temporarily lowered, and thereafter, the cutting section is raised until the lower end detecting section detects that the lower end of the cutting section is not in contact with the field scene.

According to the present invention, a combiner is provided in which a traveling portion is provided at a lower portion of the body frame and a mowing portion is provided at a front end of the body frame via a lifting mechanism so as to be able to move up and down. In, an upper limit detecting means for detecting that the reaping unit is at the highest position, and an automatic lift switch for raising the reaping unit to the highest position,
A lifting control unit for controlling the lifting mechanism, the lifting control unit interlocks with the operation of the auto-lift switch, and controls the cutting unit until the cutting unit is detected by the upper limit detection unit to be at the highest position. It was configured to rise.

According to the third aspect of the present invention, there is provided a mowing unit lowering switch for forcibly lowering the mowing unit, and the mowing mechanism of the mowing unit and the motor are interlocked and connected via a mowing clutch. In addition, the lifting control unit is configured to connect the mowing mechanism and the prime mover in conjunction with the operation of the mowing unit lowering switch.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A combine according to the present invention has a traveling section provided at a lower portion of a body frame and a reaping section provided at a front end of the body frame via a lifting mechanism so as to be movable up and down. .

In addition, a lower limit detecting means for detecting that the lower end of the mowing portion has contacted the field scene, an automatic set switch for lowering the mowing portion to a predetermined lowering position, and a control device for controlling a lifting mechanism. Lifting control unit,
The lifting control section interlocks with the operation of the auto-set switch, lowers the cutting section once until the lower end detecting section detects that the lower end portion of the cutting section has contacted the field scene, and then cuts the section by the lower limit detecting section. The cutting section is configured to be raised until it is detected that the lower end of the section is not in contact with the field scene.

Therefore, the structure for lowering the mowing section to the predetermined lowering position in conjunction with the operation of the automatic set switch can be simplified.

[0013] Moreover, since the up-and-down control unit can be constituted by switches and relays without using a controller such as a CPU or a sensor such as an infrared sensor, vibrations and mud bouncing when the combine travels in the field. CP
It is possible to reliably and satisfactorily control the raising and lowering of the reaper without causing any trouble such as failure of the U or the sensor.

Further, upper limit detecting means for detecting that the reaping unit is at the highest position, an automatic lift switch for raising the reaping unit to the highest position, and an elevation control unit for controlling the elevating mechanism. And the elevation control unit comprises:
In conjunction with the operation of the auto-lift switch, the reaper is configured to be raised until the reaper is detected at the highest position by the upper limit detection means. The structure for raising to the predetermined raising position can be simplified, and as described above, the raising and lowering control unit is configured by the switch and the relay, so that the raising and lowering control of the mowing unit can be performed reliably and satisfactorily. You can do it.

A cutting unit lowering switch for forcibly lowering the cutting unit is provided, and the cutting mechanism of the cutting unit and the prime mover are interlocked and connected via a cutting clutch. The mowing mechanism is connected to the prime mover in conjunction with the operation of the lowering switch, so that when the mowing unit lowering switch is operated and the mowing unit is forcibly lowered, the grain rod is harvested immediately. The work can be performed, and the grain rod harvesting work can be performed smoothly.

[0016]

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

FIGS. 1 and 2 show a combine A according to the present invention. The combine A is provided with a body frame 1 on a vehicle body, and a pair of right and left crawler-type traveling parts 2 is provided below the body frame 1. , 2 and a mowing unit 3 is attached to the front end of the body frame 1 so as to be able to move up and down, and a threshing unit 4 is provided immediately after the mowing unit 3. While the unit 5 is provided, an operating unit 6 is provided at the front right side of the body frame 1, and a shell particle storage tank 7 is provided immediately after the operating unit 6. Reference numeral 8 denotes a feed chain provided on the upper left side of the threshing unit 4.

The combine A cuts the cereal sticks by the cutting unit 3 while traveling in the field, and the cut hulls can be threshed by the threshing unit 4.

As shown in FIG. 1, the mowing section 3 has a mowing frame 11 attached to the upper end of a column 10 erected at the left front end of the body frame 1 so as to be vertically rotatable.

The cutting frame 11 is shown in FIGS.
As shown in the figure, a cylindrical rotating support shaft 12 extending in the left-right width direction is horizontally suspended between the upper ends of a pair of left and right support columns 10, 10 so as to be rotatable around an axis. The cylindrical vertical frame 13 extends forward and downward from the lower part, and a middle part of a cylindrical lower horizontal frame 14 extending in the left-right width direction is attached to the lower end of the vertical frame 13, and the lower horizontal frame 14 is attached. The rising frames 15, 15 are raised from the left and right ends toward the front and upward, and the upper horizontal frame 16 is suspended between the upper ends of both frames 15, 15. While the upper connecting frame 17 which curves upward in a convex manner between the upper portion of the vertical frame 13 and the upper frame, the connecting frame 18 is extended forward from the left and right sides and the center of the lower horizontal frame 14, respectively. And is formed. In addition, a mowing unit elevating motor as the elevating mechanism 9 is connected to the rotating support shaft 12 in an interlocking manner. In the figure, reference numeral 19 denotes a lower carrier supporting frame.

A total of seven weeding plates 20 for weeding the six culms to be planted are mounted on the above-mentioned mowing frame 11 at a fixed interval between the right and left width directions. A cereal stem raising device 21 for raising the weeded six-row cereal stem, a cereal stem raking device 22 for scraping the root of the six-row cereal stem raised by the cereal stem raising device 21, A cutting blade device 23 that cuts the root of the grain culm scraped by the culm scraping device 22, and a lower conveying device 24 that conveys the lower part of the six-row grain culm cut by the cutting blade device 23 to the threshing unit 4 side. And an upper conveying device 25 for conveying the upper portion of the grain culm to the threshing unit 4 side, a head conveying device 26 for conveying the head portion of the grain culm, and upper and lower conveying devices 25 and 24.
And an auxiliary transport device 27 for assisting the transfer of the grain culm to the feed chain 8 of the threshing unit 4.

Hereinafter, each device attached to the mowing frame 11 will be specifically described.

The grain stalk raising device 21 is provided with a total of six raising cases 30 extending in the vertical direction at a position immediately behind the weeding plates 20 adjacent on the left and right. A total of six raising drive cases 66 are provided between the upper part and the upper horizontal frame 16.
And a large number of raised tines 31 in each raised case 30.
a is provided so as to be rotatable in the vertical direction, and the raising mechanism 31 is configured so that each of the raising tines 31a advances when moving up and down and retracts when moving downward. I have.

The grain stalk raking device 22 is provided with each of the raising cases described above.
Immediately after the position 30, the tine-attached scraping belt 32 and the star wheel 33 are arranged so as to be vertically opposed to each other.

The lower transport device 24 includes a left lower transport mechanism 34 that clamps the lower portion of the two stalks on the left side and transports it backward.
And a central lower transport mechanism 35 that clamps the lower part of the two-row grain culm at the center and transports it backward, and a right lower transport that grips the lower part of the two-row grain culm and transports it backward. A mechanism 36 and a vertical transport mechanism 37 that clamps the lower part of the cereal stem transported by the transport mechanisms 34, 35, and 36 and transports the grain to the feed chain 8 are provided.

The transport mechanisms 34, 35, 36 basically include transport chains 34a, 35a, 36a and transport chains 34a, 35a, 36a.
35a, 36a, the strangulation body 34 arranged opposite to each culm conveyance path
b, 35b, 36b, and is configured so that the culm is clamped by the transport chains 34a, 35a, 36a and the clamping bodies 34b, 35b, 36b, and the vertical transport mechanism 37 is similarly configured. I have.

Each lower transport mechanism 34, 35, 36 has
As shown in the figure, the grain culm detectors 85a, 85b, 85c are rotatably mounted, and the grain culm detectors 85a, 85b, 85c are grain culm transported by the respective lower transport mechanisms 34, 35, 36. Is the grain stalk detector 85a,
By rotating 85b and 85c, the rotation can be detected to detect the number of mowing strips.

The vertical transport mechanism 37 has a start end located below the grain culm path P, and is transported by the left and right lower transport mechanisms 34 and 36 to remove the lower part of the grain culm joined in the grain culm path P. The feed chain 8 is securely transported to the feed chain 8 by being pinched.

The upper conveying device 25 is a left upper conveying mechanism 38 for picking up the upper part of the two-row grain stalk on the left side and conveying the same to the rear.
And a central upper transport mechanism 39 that lifts the upper part of the two-row grain culm at the center and transports it backward, and a right upper transport mechanism 40 that lifts the upper part of the two-row grain culm of the right part and transports it backward. The upper right transport mechanism 40 is divided into a front transport body 41 and a rear transport body.

A number of transport tines 38a, 39a, 41a are attached to the transport mechanisms 38, 39 and the front transport body 41 so as to be able to reciprocate in the front-rear direction, and the transport tines 38a, 39a,
41a is attached so as to advance when moving backward and retreat when moving forward, and the rear carrier 42 has the same configuration.

The upper left transport mechanism 38 is a lower left transport mechanism 34, and the upper central transport mechanism 39 is a lower central transport mechanism 35.
The front transport body 41 includes a lower right transport mechanism 36 and a rear transport body
Reference numeral 42 is disposed so as to be vertically opposed to the vertical transport mechanism 37 so that the upper and lower portions of the grain stalk are securely held and transported.

The spike transport device 26 includes a left-hand spike transport mechanism 43.
And a center-head transport mechanism 44 and a right-head transport mechanism 45. These tip transport mechanisms 43, 44, and 45 are located at a position immediately behind the star wheel 33 and have a left upper transport mechanism 38 and a central upper transport mechanism. Above each of the mechanism 39 and the front transport body 41, and disposed at a position facing each of the transport mechanisms 38, 39 and the front transport body 41 with each of the grain culm transport paths interposed therebetween, each of which has two sections The tip of the culm is transported.

And, these ear tip transport mechanisms 43, 44, 45
Of the six raised drive cases 66, three raised drive cases
It is interlocked and connected to the tip transport drive case 68 extending downward from 66, and a plurality of transport tines 43a, 44a, 45a can be rotated in the front-rear direction in each tip transport mechanism 43, 44, 45. The transport tines 43a, 44a, and 45a are configured to advance when moving backward and retreat when moving forward.

The auxiliary transport device 27 is disposed between the terminal end of the vertical transport mechanism 37 and the terminal end of the rear transport 42, and is disposed close to the start end of the feed chain 8. , The auxiliary transport device 27 is a transport mechanism of the lower transport device 24
It is configured in the same manner as 34, 35, 36, 37, so that the middle part of the grain stalk is delivered to the feed chain 8 and transported.

The reaper 3 also includes an upper limit detecting means 90 for detecting the position where the reaper 3 is raised most, and a reaper 3.
And a lower limit detecting means 91 for detecting that the lower end portion has contacted the field scene.

As shown in FIGS. 5 and 6, the upper limit detecting means 90 attaches a support bracket 92 to the upper end of the column 10 and detects the upper limit at the front end of the support bracket 92 and directly above the vertical frame 13. While the switch 93 is mounted, the pivot 12
A support shaft 94 is protruded at a position on the outer peripheral surface front side of the support shaft 94, and a switch pressing plate 95 is attached to a tip of the support shaft 94. In the figure, reference numeral 96 denotes a bracket.

When the vertical frame 13 rotates to the upper limit position, the switch pressing plate 95 presses the upper limit detection switch 93.

As shown in FIG. 7, the lower limit detecting means 91 attaches a lower limit detecting switch 98 to a weeding board support frame 97 for supporting the weeding board 20, and a lower end detecting switch 98 is provided at the tip of the weeding board supporting frame 97. The grass plate 20 is rotatably mounted up and down via a support shaft 99, and a switch pressing plate 100 protrudes upward from the support shaft 99. In the figure, 101 is a switch rod, and 102 is an urging spring.

The weeding plate 20 is composed of a weeding plate support 20a having a base end rotatably mounted on a weeding plate support frame 97 and a weeding plate attached to the distal end of the weeding plate support 20a. And a plate body 20b. The field 10 is located at the lower end of the weed board 20b.
3 is connected to a weeding board support frame 97 via a wire 106, and a weeding board lock lever 105 provided on the driving unit 6 is connected to the weeding board support frame 97. By tilting the lock lever 105 forward,
While the weeding plate 20 is forcibly turned upward in the locked state, the weeding plate lock lever 105 is tilted rearward, so that the weeding plate 20 can be turned up and down. And so on.

When the cutting part 3 descends and the float 104 of the weeding plate 20 comes into contact with the upper surface of the field 103, the weeding plate 20 rotates upward, and the switch pressing plate 100 is turned on by the lower limit detection switch. Press 98.

Next, a power transmission mechanism B for transmitting power from the engine E mounted on the body frame 1 to each device provided on the mowing unit 3 will be described with reference to FIG.

To the grain stalk raising device 21, the engine E → the transmission unit M → the cutting clutch 128 → the cutting drive shaft 50 → the vertical transmission shaft 60 → the lower horizontal transmission shaft 63 inserted into the lower horizontal frame 14 →
The rising transmission shaft 64 inserted in the rising frame 15 → the upper horizontal transmission shaft 65 inserted in the upper horizontal frame 16 → the raising drive shaft 67 inserted in the raising drive case 66 → the raising output shaft
81 → Power is transmitted as in the grain stem raising device 21.

The raising drive shaft 67 is connected to the tip conveying device 26.
Then, power is transmitted in the order of the raising drive shaft 67 → the tip transport drive shaft 69 → the tip transport output shaft 82 → the tip transport device 26.

Power is transmitted to the feed chain 8 in the order of the engine E → transmission section M → feed chain clutch 129 → feed chain drive shaft 54 → feed chain 8.

The auxiliary transfer device 27, the rear transfer body 42, the lower right transfer mechanism 36, and the grain squeezing device 22 are derived from the vertical drive shaft 60, and the vertical drive shaft 60 → the auxiliary / rear transfer drive. axis
61 → auxiliary / rear side transport rising shaft 70 → power is transmitted like auxiliary transport device 27 and rear transport body 42, and vertical power transmission shaft 60 → right lower transport drive shaft 71 → right lower transport mechanism 36 →
Power is transmitted as in the cereal stem scraping device 22, and further to the front side transport body 41 and the vertical transport mechanism 37, derived from the right lower side transport drive shaft 71, and the right lower side transport drive shaft 71 → front side transport drive. Power is transmitted as shaft 72 → front side transport body 41, and power is transmitted as lower right side transport drive shaft 71 → vertical transport first drive shaft 73 → vertical transport second drive shaft 74 → vertical transport mechanism 37 Is done.

Power is transmitted to the cutting blade device 23 in the order of the lower horizontal transmission shaft 63 → the cutting blade drive shaft 75, 75 → the cutting blade devices 23, 23, derived from the lower horizontal transmission shaft 63. You.

The upper left / lower transport mechanisms 38, 34 and the upper central
The lower transport mechanisms 39 and 35 are derived from the rising transmission shaft 64 and rise transmission shaft 64 → the left upper / lower transport drive shaft 76.
→ Power is transmitted as shown in the upper left / lower transport rising shaft 77 → left upper / lower transport mechanism 38, 34 → central lower transport mechanism 35 → central upper transport mechanism 39.

The transmission section M is connected to the traveling drive transmission section 78 via a traveling drive transmission mechanism 79 in an interlocked manner, and also via a handling cylinder 4a provided on the threshing section 4 and a handling cylinder drive transmission mechanism 80. Linked and linked.

As shown in FIG. 8, the driving unit 6 includes a cabin
A floor 108 is formed inside 107, a side operation column 109 is provided on the left half of the floor 108, and a handle column 110 is provided on the front of the right half.
A handle 111 is attached to the upper end of the handle 0, and a seat 112 is provided at a position behind the handle 111.

A liquid crystal display 113 is provided at the front of the side operation column 109, and a main speed change lever 114 and a sub speed change lever 115 as forward / reverse switching levers are disposed at the rear of the side operation column 109 so as to be adjacent to each other. A work clutch lever 116 is provided at these rear positions, and a switch operation by an auto-set switch 122 or an auto-lift switch 123, which will be described later, is provided at a position on the left side of the main shift lever 114 so as to enable or disable the operation. The automatic operation changeover switch 117 is provided.

The main shift lever 114 is, as shown in FIG.
A grip portion 119 is formed at the tip of the lever body 118, and the grip portion 1 is formed.
At the front side of FIG. 19, a mowing section raising switch 120 for forcibly raising the mowing section 3 and a mowing section lowering switch 121 for forcibly lowering the mowing section 3 are disposed adjacently to the left and right. At the same time, on the right side of the gripper 119, the reaper 3
An automatic set switch 122 for lowering the mowing unit 3 to a predetermined lowering position and an automatic lift switch 123 for raising the mowing unit 3 to a predetermined raising position are arranged vertically adjacent to each other.

These switches 122 and 123 function effectively only when the automatic operation changeover switch 117 is ON.

As shown in FIG. 10, a semi-circular detecting plate 124 is provided at the base end of the lever main body 118 as shown in FIG.
The detection plate 124 bulges the center portion of the outer peripheral surface to form a detection body 125, while the neutral detection switch 126 and the reverse detection switch 127 are located immediately below the detection plate 124 and at the front lower position. And are arranged respectively.

When the main shift lever 114 is in the neutral state, the detecting body 125 presses the neutral detection switch 126 to tilt the main shift lever 114 rearward to move the vehicle backward. In the meantime, the detection body 125 presses the reverse detection switch 127, and the main speed change lever
114 can detect whether it is in the forward, neutral, or reverse state.

As shown in FIGS. 11 and 12, when the working clutch lever 116 is tilted rearward, the cutting clutch 128 and the feed chain clutch 129 are both disconnected, and the working clutch lever 116 is set upright. , While the cutting clutch 128 is disconnected, the feed chain clutch 12
9 is connected, and furthermore, when it is tilted forward, the reaping clutch 128 and the feed chain clutch 12
9 and are connected together.

That is, a work clutch lever 116 is attached to the machine frame 1 so as to be able to rotate back and forth, and a pivot plate 130 attached to the machine frame 1 so as to be able to turn up and down is interlocked to the base end of the work clutch lever 116. A bifurcated locking claw 131 is formed on the rotating plate 130, and a motor supporting plate 133 for supporting a clutch motor 132 is attached to the body frame 1 so as to be vertically rotatable. Locking pin
134, the locking pin 134 is locked by the locking claw 131, and the base end of the arm 136 is connected to the rotating shaft 135 of the clutch motor 132 so that the arm 136 is The base ends of the cutting-side wire 137 and the feed chain-side wire 138 are attached to the ends, respectively, and the cutting clutch 128 and the feed chain clutch 129 are connected to the ends of the wires 137 and 138, respectively.

The harvesting clutch 128 hangs a transmission belt 141 between a pulley 139 interlocked with the transmission M and a pulley 140 interlocked with the mowing drive shaft 50, and connects and disconnects the clutch pulley 142 to and from the transmission belt 141. It is provided freely,
The clutch pulley 142 is rotatably supported on a distal end of a clutch arm 143 whose base end is rotatably attached to the body frame 1. The feed chain clutch 129 has the same configuration as the mowing clutch 128.

When the working clutch lever 116 is tilted rearward, as shown in FIG. 12 (a), the rotating plate 130 rotates downward, and accordingly,
The motor support plate 133 rotates downward. In this state, the cutting side wire 137 and the feed chain side wire 137
When the clutch motor 132 is rotated approximately 90 degrees clockwise, the wires 137 and 138 are not pulled, and the cutting clutch 128 and the feed chain clutch 129 are both disconnected. .

When the work clutch lever 116 is in the upright state, the rotating plate 130 rotates upward as shown in FIG. 12 (b), and accordingly, the motor supporting plate 133 moves upward. To rotate. In this state, the cutting wire 137
Is still loose, the feed chain side wire 138 is tight, and when the clutch motor 132 is turned approximately 90 degrees clockwise, the feed chain side wire 138 is rotated.
Is pulled, so that the cutting clutch 128 is still disconnected, but the feed chain clutch 129 is connected.

When the work clutch lever 116 is tilted forward, as shown in FIG.
130 rotates upward, and accordingly, the motor support plate 133 rotates upward. In this state, the mowing side wire 137 and the feed chain side wire 138 are both taut, and the clutch motor 132 is turned clockwise about 90 degrees.
When the wing is rotated by a degree, the cutting side wire 137 and the feed chain side wire 138 are pulled together, and the cutting clutch 128 and the feed chain clutch 129 are both connected.

Next, the raising and lowering operation of the mowing unit 3 will be described with reference to FIG. FIG. 13 shows an elevating controller C for elevating and lowering the mowing unit 3. In the figure, V is a power supply terminal, and G is a ground terminal.

[0062]

[Table 1]

(Modes 1 to 3) When the cutting unit lowering switch 121 is operated, the cutting lowering relay 146 is operated, and accordingly, the cutting lowering solenoid 147 is operated, and the cutting unit connected to the cutting lowering solenoid 147 is operated. The lifting motor (not shown) operates, and the reaping unit 3 is forcibly lowered.

Further, the clutch motor operation relay 156 is operated in conjunction with the operation of the mowing section lowering switch 121, and the clutch motor 132 is driven. At this time, when the work clutch lever 116 is in the backward tilted posture, both the reaping clutch 128 and the feed chain clutch 129 are in the disconnected state (mode 1), and when the work clutch lever 116 is in the neutral posture, the feed chain clutch 129 is connected (mode 2), and when the work clutch lever 116 is in the forward tilt position, the reaping clutch 128 and the feed chain clutch 12
9 are both connected (mode 3).

As described above, since the mowing clutch 128 is connected in conjunction with the operation of the mowing unit lowering switch 121, the mowing unit lowering switch 121 is operated to forcibly lower the mowing unit 3. In this case, the harvesting work can be performed immediately, and the harvesting work can be performed smoothly.

(Mode 4) When the mowing unit raising switch 120 is operated, the mowing raising relay 148 is operated, and accordingly, the mowing raising solenoid 149 is operated, and the mowing unit elevating motor (connected to the mowing raising solenoid 149) is operated. (Not shown)
Is operated, and the mowing part 3 is forcibly raised.

(Modes 5 to 9) When the automatic operation changeover switch 117 is turned off, the mowing unit 3 does not move up and down and stops even when the automatic set switch 122 or the automatic lift switch 123 is operated. Keep state.

As described above, the present embodiment is provided with the automatic operation changeover switch 117 for switching the operation of the automatic set switch 122 and the automatic lift switch 123 so as to enable or disable the operation.
By disabling the switch operation by the automatic operation changeover switch 117, even if the operator's body erroneously comes into contact with the auto set switch 122 or the auto lift switch 123, the mowing unit 3 is contrary to the operator's will. The raising and lowering operation does not occur, and the grain rod harvesting operation can be performed smoothly.

(Modes 10 to 15) When the automatic operation changeover switch 117 is turned on and the automatic lift switch 123 is operated, the reaper 3 automatically rises (mode 11), and the upper limit detection switch 93 is set. Is turned on, the auto-lift release relay 150 operates, and the reaper 3
Stops the ascent operation (mode 13).

Further, the automatic operation changeover switch 117 is turned on.
In this state, when the auto-set switch 122 is operated, the mowing unit 3 is automatically lowered (mode 12), and when the lower-limit detection switch 98 is turned on, the auto-set release relay 151 is activated. Then, the mowing unit 3 is once raised until the mowing lift solenoid 149 is operated and the lower limit detection switch 98 is turned off (mode 14).

(Modes 16 to 19) When the automatic operation changeover switch 117 is turned off and the work clutch lever 116 is tilted rearward, a mowing switch that operates in conjunction with the work clutch lever 116 152
The feed chain switch 153 and the feed chain switch 153 are both turned off, so that the clutch motor drive relay 154 that operates in conjunction with both switches 152 and 153 does not operate, and even if the clutch motor operation switch 155 is on, the clutch motor operation relay 156 operates. The clutch motor 13
2 is not driven, and the cutting clutch 128 and the feed chain clutch 129 are both disconnected (mode 16).

Further, the automatic operation changeover switch 117 is turned off.
When the state is set to the F state and the work clutch lever 116 is in the upright state, the reaping switch 152 is turned off, but the feed chain switch 153 is turned on, and only the feed chain clutch relay 157 is operated, and accordingly, Then, the clutch motor drive relay 154 is operated, and the clutch motor 132 is driven, so that only the feed chain clutch 129 is connected (mode 17).

Further, the automatic operation changeover switch 117 is turned off.
In the F state, the work clutch lever 116 is tilted forward, and the main shift lever 114 is in the neutral or reverse state, the neutral detection switch 12
6 or the reverse detection switch 127 is turned on, and both the clutch relay 158 and the reaping clutch relay 159 are turned off.
Side, so that the clutch motor 132 is not driven, and both the reaping clutch 128 and the feed chain clutch 129 are disconnected (mode 18).

On the other hand, the automatic operation changeover switch 117 is
In the F state, the work clutch lever 116 is tilted forward, and the main shift lever 114 is in the forward state, the neutral detection switch 126 and the reverse detection switch 127 are turned off, The feed chain clutch relay 157, the clutch relay 158, and the reaping clutch relay 159 are all turned ON, and accordingly, the clutch motor driving relay 154 is activated, and the clutch motor 132 is driven, so that the reaping clutch 128 is driven.
And the feed chain clutch 129 are connected together (mode 19).

(Mode 20 to Mode 24) The automatic operation changeover switch 117 is turned on, and the work clutch lever
When the 116 is tilted backward, both the mowing switch 152 and the feed chain switch 153 are turned off.
In the F state, the clutch motor drive relay 154 does not operate, and therefore the clutch motor 132 does not drive, and both the reaping clutch 128 and the feed chain clutch 129 are disconnected (mode 20).

Further, the automatic operation changeover switch 117 is turned on.
When the working clutch lever 116 is in the upright state, the reaper switch 152 is turned off, but the feed chain switch 153 is turned on, and only the feed chain clutch relay 157 is activated. The clutch motor drive relay 154 is operated, and the clutch motor 132 is driven to connect only the feed chain clutch 129 (mode 21).

Further, the automatic operation changeover switch 117 is turned on.
When the main clutch lever 116 is in the neutral or reverse state, and the work clutch lever 116 is tilted forward, the neutral detection switch 126
Alternatively, the reverse detection switch 127 is turned on, and both the clutch relay 158 and the reaping clutch relay 159 are operated to the OFF side, so that the clutch motor 132 is not driven, and
Both the cutting clutch 128 and the feed chain clutch 129 are disconnected (mode 22).

On the other hand, the automatic operation changeover switch 117 is turned on.
When the auto set switch 122 is operated in a state where the work clutch lever 116 is tilted forward and the main shift lever 114 is in the forward state, the feed chain clutch relay 157 and the clutch relay 158 and the reaping clutch relay 159 all operate to the ON side, and accordingly, the clutch motor driving relay 15
4 is operated, the clutch motor 132 is driven, and the mowing clutch 128 and the feed chain clutch 129 are both connected (mode 23).

As described above, in this embodiment, since the mowing clutch 128 and the feed chain clutch 129 are connected to each other in conjunction with the operation of the automatic set switch 122, the automatic set switch 122 is operated. By simply doing so, the grain rod cutting operation can be performed immediately, and the grain rod cutting operation can also be performed smoothly.

Further, the automatic operation changeover switch 117 is turned on.
When the auto clutch switch 116 is operated while the main clutch lever 116 is in the forward state and the work clutch lever 116 is tilted forward, the auto clutch release relay 160 operates. The clutch relay 158 and the reaping clutch relay 159 are both
FF side, so the clutch motor 132 is not driven, and the reaping clutch 128 and the feed chain clutch 129
And are disconnected (mode 24).

As described above, in the present embodiment, since the mowing clutch 128 and the feed chain clutch 129 are configured to be in a disconnected state in conjunction with the operation of the auto lift switch 123, the auto lift switch is operated. Only by this, the operation of the mowing mechanism can be stopped, and waste of power by the prime mover can be prevented.

In this embodiment, as shown in FIG. 13, in order to control the raising and lowering of the reaping unit 3, the lifting and lowering control unit C is constituted by using various switches and relays. No sensor or the like for detecting the elevation position of No. 3 is used. When the elevation control unit C is configured by using the CPU and the sensor, the CPU and the sensor break down due to vibration and jumping of mud when the combine A runs on the field, and the elevation control of the cutting unit 3 can be performed well. However, by configuring the elevation control unit C with various switches and relays as in the present embodiment, such a problem does not occur, and the elevation control of the reaping unit 3 can be performed reliably and satisfactorily. it can.

[0083]

The present invention is embodied in the form described above and has the following effects.

(1) According to the first aspect of the present invention, the lower limit detecting means for detecting that the lower end of the cutting unit has contacted the field scene, and the automatic lowering means for lowering the cutting unit to a predetermined lowering position. A set switch, and an elevating control unit for controlling the elevating mechanism, wherein the elevating control unit interlocks with the operation of the auto set switch, and the lower end detection unit contacts the lower end of the reaping unit to the field scene. Since the mowing unit is temporarily lowered until it is detected that the mowing unit is lowered, and then the lower limit detecting unit is configured to raise the mowing unit until it detects that the lower end of the mowing unit is not in contact with the field scene, the automatic setting is performed. The structure for lowering the reaper to the predetermined lowering position in conjunction with the operation of the switch can be simplified.

Further, since the up / down control unit can be constituted by a switch or a relay without using a controller such as a CPU or a sensor such as an infrared sensor, vibrations and mud bouncing when the combine travels in the field. CP
It is possible to reliably and satisfactorily control the raising and lowering of the mowing part without causing any trouble such as failure of the U and the sensor.

(2) According to the second aspect of the present invention, an upper limit detecting means for detecting that the cutting unit is at the highest position, an automatic lift switch for raising the cutting unit to the highest position, A lifting control unit for controlling the lifting mechanism, the lifting control unit interlocks with the operation of the auto-lift switch, and controls the cutting unit until the cutting unit is detected by the upper limit detection unit to be at the highest position. Since it is configured to be raised, the configuration for raising the reaping unit to the predetermined raised position in conjunction with the operation of the auto lift switch can be simplified.

Further, as described above, the raising and lowering control unit is constituted by the switch and the relay, so that the raising and lowering control of the mowing unit can be performed reliably and well.

(3) According to the third aspect of the present invention, a cutting unit lowering switch for forcibly lowering the cutting unit is provided, and the cutting mechanism of the cutting unit and the prime mover are linked and connected via a cutting clutch. In addition, the lifting control unit is configured to connect the mowing mechanism and the prime mover in conjunction with the operation of the mowing unit lowering switch, so that the mowing unit is forcibly operated by operating the mowing unit lowering switch. When it is lowered, the grain rod cutting operation can be performed immediately, and the grain rod cutting operation can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is a left side view of a combine according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the reaper.

FIG. 4 is a front view of the same.

FIG. 5 is a side view showing an upper limit detection switch.

FIG. 6 is a plan view of the same.

FIG. 7 is a side view showing a lower limit detection switch.

FIG. 8 is a plan view showing a driving unit.

FIG. 9 is a perspective view showing a grip portion of the main transmission lever.

FIG. 10 is a view showing a main shift lever.

FIG. 11 is an explanatory view showing a reaping clutch.

FIG. 12 is an explanatory view showing the operation of the reaping clutch.

FIG. 13 is a block diagram showing an elevation control unit of the mowing unit.

FIG. 13 is a block diagram showing an elevation control unit of the mowing unit.

FIG. 14 is an explanatory view showing a power transmission mechanism.

[Explanation of symbols]

 A Combine 1 Airframe 2 Running section 3 Cutting section 4 Threshing section 5 Threshing section 6 Operating section 8 Feed chain 114 Main transmission lever 116 Work clutch lever 117 Auto operation changeover switch 120 Cutting section up switch 121 Cutting section down switch 122 Auto Set switch 123 Auto lift switch 128 Cutting clutch 129 Feed chain clutch 132 Clutch motor

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] April 2, 1999 (1999.4.2)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a left side view of a combine according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the reaper.

FIG. 4 is a front view of the same.

FIG. 5 is a side view showing an upper limit detection switch.

FIG. 6 is a plan view of the same.

FIG. 7 is a side view showing a lower limit detection switch.

FIG. 8 is a plan view showing a driving unit.

FIG. 9 is a perspective view showing a grip portion of the main transmission lever.

FIG. 10 is a view showing a main shift lever.

FIG. 11 is an explanatory view showing a reaping clutch.

FIG. 12 is an explanatory view showing the operation of the reaping clutch.

FIG. 13 is a block diagram showing an elevation control unit of the mowing unit.

FIG. 14 is an explanatory view showing a power transmission mechanism.

[Description of Signs] A Combine 1 Airframe 2 Running section 3 Cutting section 4 Threshing section 5 Drainage processing section 6 Operating section 8 Feed chain 114 Main transmission lever 116 Work clutch lever 117 Auto operation changeover switch 120 Cutting section lift switch 121 Cutting Lower switch 122 Auto set switch 123 Auto lift switch 128 Cutting clutch 129 Feed chain clutch 132 Clutch motor

Claims (3)

[Claims] A traveling section (2) is provided at a lower portion of a body frame (1), and a cutting section is provided at a front end of the body frame (1).
A lower limit detecting means (91) for detecting that the lower end of the reaper (3) has come into contact with a field scene in a combine which is arranged so that (3) can be moved up and down via an elevating mechanism (9). And an auto set switch (122) for lowering the reaper (3) to a predetermined lowering position.
And an elevating control unit (C) for controlling the elevating mechanism (9). The elevating control unit (C) interlocks with the operation of the auto set switch (122) to operate the lower limit detecting means (91). Until the lower end of the reaper (3) is detected to be in contact with the field scene.
Is temporarily lowered, and then the cutting unit (3) is raised until the lower end detecting means (91) detects that the lower end of the cutting unit (3) is not in contact with the field scene. Combine to do. 2. A traveling section (2) is provided at a lower portion of the body frame (1), and a mowing section is provided at a front end of the body frame (1).
Upper limit detecting means (90) for detecting that the cutting unit (3) is at the highest position, in a combine having (3) arranged to be able to move up and down via an elevating mechanism (9); (3) An auto-lift switch (123) for raising the
(9) and an elevation control unit (C) for controlling the operation of the auto-lift switch (123). 3) A combine which is configured to raise the cutting unit (3) until it is detected that is at the highest position. 3. A reaper lowering switch (121) for forcibly lowering the reaper (3).
The mowing mechanism of (3) and the prime mover are interlockingly connected via a mowing clutch (128), and the lifting / lowering control section (C) is linked with the operation of the mowing section lowering switch (121) to operate the mowing mechanism and the prime mover. 3. The apparatus according to claim 2, wherein
The described combine.