JPH0745161Y2 - Combine Straw Switching Device - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a straw switching device mounted on a combine,
More specifically, when the straw is selectively switched between the cutter work for supplying to the cutter and the discharge work for discharging the straw as it is, it is possible to disable the combine discharge when there is a grain culm in the grain culm transport route. The present invention relates to a straw switching device.

[Prior art]

The straw switching device equipped on the combine has, for example, a switching plate that opens and closes the upper part of the cutter and a drive arm that swings the straw rail between the discharge position and the retreat position. It is a general structure that the arm can be selectively switched between cutting work and discharging work by operating the operation lever.

This switching lever is generally provided on the rear side of the machine body, but when cutting work is performed on the outward path and discharging work is performed on the return path, it is necessary to operate each time, but that operation is not The operator himself had to move from the driver's seat to the rear part of the machine to switch, and the work efficiency was lowered because the work was once interrupted, and at the same time, the operation was troublesome.

[Problems to be solved by the invention]

In order to solve the above-mentioned problem, there is a switch lever provided near the driver's seat via a connecting rod or the like. However, this switch lever has a resistance of a link system or Bowden wire system constituting a switching mechanism. Is added,
There is a problem that the operation load of the switching lever is significantly heavy and there is also the arrangement of other operation levers, so that it cannot be provided at an appropriate position.

Furthermore, it is very convenient because you can operate the switching lever while you are in the driver's seat, but since the straw switching mechanism itself is arranged at the rear of the aircraft, check whether there is straw behind. If the switching lever is operated without it, there is a problem in that the switching mechanism between the switching plate and the straw rail is clogged with straw and the switching mechanism cannot switch smoothly.

Therefore, in view of the above-mentioned conventional circumstances, the present invention was devised in order to solve the problem, and it can be switched by operating a switching switch provided near the driver's seat, The present invention is implemented for the purpose of providing a combine straw switching device that cannot be switched when there is a grain culm.

[Means for solving problems]

The present invention that achieves the above object is provided with a switching mechanism for selectively switching the straw conveying path between cutting work and discharging work, and an electric circuit for connecting an actuator driving the switching mechanism and a switching switch provided near the driver's seat. In addition, through the grain culm detection means provided in the grain culm transport path in front of the cutter part to detect the presence or absence of grain culm, the switching mechanism is operated by operating the switching switch, and the grain culm detection means is detecting grain culm. Although it is impossible to switch, the switching control is automatically performed by the non-detection of the grain culm by the grain culm detecting means.

[Action]

Therefore, a switching mechanism 38 for selectively switching the straw conveying path between the cutting work C and the discharging work H is provided.
Even when the actuator 30 for driving the 38 is switched by the switching switch 43 provided in the vicinity of the driver's seat 9, the electric circuit connecting the actuator 30 and the switching switch 43 has a switch of the discharge conveyance route. Even if the switching switch 43 is operated, the straw sensor 44 can be operated even if the switching switch 43 is operated by interposing the straw sensor 44 provided at the detection position K which is located a position L ahead of the plate closing position P and detecting the presence or absence of straw. Since the switching mechanism 38 cannot be switched while detecting the straw, it is switched during the transport of the straw and the switch between the switching plate 15 and the straw rail 24 is clogged with the straw so that switching cannot be performed. Trouble can be solved.

Then, when the straw sensor 44 is in a non-detected state of straw, that is, when there is no straw in the straw conveyance path, the switching direction of the operated switching switch 43 (either cutting work or discharging work). It is not necessary to visually check the state in which there is no straw in the straw conveying path each time switching is performed, and the switching switch 43 can be reliably switched by hand.

〔Example〕

Hereinafter, the drawings showing the present invention as an embodiment will be described.

As shown in FIG. 5, the combine C comprises a reaping unit 1 for reaping the standing culm culms raised from the front of the machine body side and a grain culm transport mechanism 3 for transferring the culled grain culms to the rear threshing unit 2. And the like, a threshing unit 2 disposed behind the mowing unit 4, a straw conveying unit 5 connected to the rear side of the threshing unit 2, and a straw conveying unit disposed below the straw conveying unit. Cutlery part of straw 6
Are arranged respectively. Further, a driving operation unit 7, a driver's seat 9 behind the driving operation unit 7, and a grain tank 10 behind the driver's seat 9 are arranged from the front part on the other side of the machine body, and a pair of left and right crawlers are provided below. 11 are provided.

As shown in FIGS. 2 to 3, the cutter unit 6 is provided with a cutting mechanism 12 in which a large number of disc blades 12a12b are arranged in parallel along the culm direction of the straw discharged from the threshing unit 2. Above the cutting mechanism 12, a switching plate 15 for opening and closing a drop opening 14 above the cutter unit 6 around a lateral fulcrum shaft (horizontal axis) 13 is provided.
The switching plates 15 are pivotally supported, and the switching plates 15 are provided on both the left and right sides of the conveyance path of the straw chain 26, and the interlocking arms 16 are fixed to the sides of the horizontal shaft 13.

Further, a bracket 17 which is fixed to the machine body in the horizontal direction is provided, and a deceleration case 19 having a deceleration mechanism installed therein is fixed on the bracket 17. A vertical fulcrum shaft (vertical axis) 20 that is decelerated by a speed reduction mechanism is rotatably supported on the deceleration case 19, and the vertical axis 20 has a discharge position H indicated by a solid line in FIG. The base end of a drive arm 21 that reciprocally swings between a cutter position C indicated by and a chain line is fixed.

At the swinging end of the drive arm 21, the link 22 and the link
Two straw rails 24a and 24b are connected and fixed via 23, and the start end side of the straw rail 24 has a straw chain 26
The main straw rails 25a and 25b, which are fixed along the transport path of the main straw rail 25, are fitted and connected to each other, and the straw rail 24 is slidably provided on the main straw rail. Has been. The straw-straight chain 26 is connected to the end of a feed chain provided along the front surface of the threshing unit 2 in the threshing unit 2.

The input shaft 27 protruding outward from the deceleration case 19 is connected and fixed to the output shaft 29 of the electric motor (DC motor) 30,
The electric motor 30 is fixed to the deceleration case 19 via the left and right brackets 31, and an actuator mechanism 28 that drives the drive arm 21 is constituted by these. The swing end of the interlocking arm 32 fixed to the vertical axis 20 and the horizontal axis
The rocking end of the interlocking arm 16 fixed to 13 is interlockingly connected by the Bowden wire 33, and the interlocking arm 1 is interlocked by the spring 34 interposed between the interlocking arm 16 and the inner wire 33a.
Can absorb 6 strokes. Further, the above-mentioned interlocking arm 32 operates the stop switches 36 and 37 fixed on the deceleration case 19 when the drive arm 21 moves to the cutter position C and the discharge position H.

Next, an electric circuit diagram for driving the electric motor 30 shown in FIG. 3 will be described. In FIG. 3, 39 is a main switch,
Reference numeral 41 is a clutch switch for connecting and disconnecting the threshing clutch, and 43 is a switching switch for switching the electric motor 30 between the forward rotation and the reverse rotation. The switching switch 43 is provided in the driving operation section 7 near the driver's seat 9.
Reference numeral 44 denotes a switch for a detection sensor for detecting the presence or absence of straw, which is arranged at a detection position K which is a distance L ahead of the switching plate closing position P in the conveyance path of the straw chain 26 and which has an electric motor 30.
And a switching switch 43 are connected to an electric control circuit. The switch 44 for this detection is not provided in the straw conveying route, but is inserted in the grain-sheath sandwiching / conveying path that is further forward of the straw-conveying conveying path and is composed of a feed chain and a trapping rail, and conveys the grain-culm holding / conveying path. You may make it detect the presence or absence of the grain culm. In FIG. 3, reference numeral 48 is a micro computer.

Therefore, when the switching switch 43 is operated to either the cutter position C or the discharge position H, the electric motor 30
Is rotated in the normal or reverse direction, the drive arm 21 starts moving to the discharge position H or the cutter position C centered on the vertical axis 20, but the stop switch on the side contacted by the interlocking arm 32.
The rotation of the electric motor 30 is stopped by 36 or 37. Along with this, one of the display lamps 45 and 46 lights up to display the switching position.

The above is the case where the detection sensor 44 does not detect the straw, but in the ON state where the detection switch 44 detects the straw, even if the switching switch 43 is switched to either one, the electric motor 30 is not operated. When power is not supplied, the display lamps 45 and 46 blink alternately to indicate that switching is not possible.

Then, a rotation signal is output to the electric motor 30 so that the switching switch 43 is operated in a predetermined time after a lapse of no straw at the detection position K and the detection sensor 44 no longer detects the straw.
However, only the normal switching operation is performed when the clutch switch 41 is off.

The above operation will be described with reference to the float chart shown in FIG. 4. When the straw sensor 44 is OFF (state where straw is not detected), the state of the switching switch 43 and the state of the stop switch 36 or 37 are distinguished, The electric motor 30 is turned on and off. For example, if the switching switch 43 is in the cutter position C and the stop switch 36 is off, the stop switch 36 is turned on.
The electric motor 30 rotates in the normal direction until. The switching direction is indicated by the lamp 45.

When the straw sensor 44 is ON (discharging detection state), the electric motor
When the switching switch 43 is switched to operate the electric motor 30, even if the switching switch 43 is switched, the electric motor 30 remains stopped through the route on the right side shown in the float chart.
It should be noted that when the switch 44 is switched on while the straw sensor 44 is ON, the flag A = 1 and the lamps 45 and 46 blink alternately. When the straw sensor 44 is turned from ON to OFF in this state, the timer is set and the electric motor 30 starts to rotate after a certain period of time, but during this certain period of time, the straw at the detection position K passes the cutter unit 6 ( It is the time until it is discharged).

If the straw sensor 44 is turned on while the electric motor 30 is rotating, in this case, both stop switches 36 and 37 are turned off.
Therefore, the electric motor 30 continues to rotate until both stop switches 36 or 37 are turned on. This prevents the switching mechanism 38 from stopping midway between the discharge position H and the cutter position C and clogging the straw.

Further, since the time for switching the switching plate 15 is set shorter than the time for the straw to move from the detection position K to the switching plate closing position P, the time for the straw to reach the switching plate 15 from the detection position K is set. Since the switching of the switching plate 15 is completed, the straw is not clogged. That is, the detection position K is provided in front of the switching plate closing position P by a predetermined distance L in anticipation of the movement time of the straw, but the longer the distance L, the longer the timer setting time. do it.

In addition, when the switching switch 43 is switched to operate the electric motor 30 when the exhaust sensor 44 is ON, the electric motor 30 does not operate and the timer operates at a constant time when the exhaust sensor 44 changes from ON to OFF. After a lapse of time, the electric motor 30 operates, but when the straw sensor 44 is turned on again while counting by the timer, the electric motor 30 does not operate even after a certain period of time, and the straw sensor 44
When is turned ON again, the timer will be re-counted from the beginning.

In the embodiment, the electric motor 30 is shown as the actuator, but this actuator is not a hydraulic expansion / contraction mechanism consisting of a hydraulic cylinder and a piston, and an electromagnetic switching valve for switching this hydraulic expansion / contraction mechanism is configured to be switched by the switching switch 43. It's okay.

[Effect of device]

As described above, the present invention is provided with a switching mechanism for selectively switching the straw conveying path between cutting work and discharging work, and the actuator for driving the switching mechanism is driven by the switching switch near the driver's seat. Even in the case of the above, the electric circuit connecting the actuator and the switching switch is provided with a grain culm detecting means provided in the grain culm conveying path preceding the cutter to detect the presence of grain culm. , Even if the switching switch is operated, the switching mechanism cannot be switched while the grain culm detecting means detects the grain culm, that is, when there is a grain culm in the grain culm transport path, so switching is performed during transportation of the grain culm. It is possible to solve the problem that the switching mechanism is clogged with straw and switching becomes impossible.

Moreover, when the grain culm detecting means is in a state in which the grain culm is not detected, that is, when there is no grain culm in the grain culm transport path, the grain culm transport path is automatically switched to the switching direction of the operated switch. It is not necessary to visually check the state that there is no grain culm every time switching is performed, and it is possible to reliably switch by simply operating the switching switch at hand.

Therefore, it is possible to provide a combine straw discharge switching device which can switch the switching mechanism by operating a switching switch provided near the driver's seat, but which cannot switch when there is a grain culm in the grain culm transport path.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a plan view of the straw switching device, FIG. 2 is a side view of the straw switching device, FIG. 3 is an electric circuit diagram, and FIG. 4 is a control mechanism. Float chart, 5th
The figure is an overall perspective view of the combine. 5: Straw transport part, 6: Cut part, 9: Driver's seat,
12 …… cutter, 13 …… horizontal axis, 14 …… falling port, 15 …… switching plate, 20 …… vertical axis, 21 …… driving arm, 24 …… straw rail, 25 …… main straw rail, 26 …… Straw chain, 28 …… Drive mechanism, 30 …… Electric motor (actuator), 33 ……
Bowden wire, 36 …… stop switch, 37 …… stop switch, 38 …… switching mechanism, 43 …… switching switch,
44: Straw sensor (grain culm detection means), 45: Lamp, 46
...... Lamp, 47 ...... Buser, 48 ...... Microcomputer, C ...... Combine, H ...... Discharge position, C ...... Cutter position, P ...... Switch plate closing position, K ...... Detection position.

Claims (1)

[Scope of utility model registration request] 1. A cutter part is provided with a switching mechanism for selectively switching the straw conveying route between cutting work and discharging work, and an electric circuit connecting an actuator for driving the switching mechanism and a switching switch provided near a driver's seat. The grain culm detection means for detecting the presence or absence of grain culm, which is provided in the grain culm conveyance path in the preceding position, is interposed, and the switching mechanism is operated by the operation of the switching switch so that the grain culm detection means cannot switch the grain culm during the detection. An combine straw discharge switching device that is automatically controlled by the eggplant non-culm detecting means to detect the grain culm.