JP7601076B2 - Harvesting Machine - Google Patents

Description

The present invention relates to a harvester.

Conventionally, a combine harvester is known that is equipped with a harvesting device that harvests stalks, a threshing device that threshes grains from the stalks and transports the straw waste, a cutting device that cuts the straw waste, a diffusion discharge device that discharges the cut straw while diffusing it within a set range, and a straw waste dropper that discharges the straw waste outside the machine without passing through the cutting device (Patent Documents 1 and 2).
This allows the cut straw to be easily decomposed in the soil, improving the fertility of the field and preventing the straw from floating up and interfering with the planting of rice seedlings.Also, straw that is not cut and discharged can be easily picked up and collected, making it easier to recover.
The diffusion discharge device can change the rotation of the diffusion roll to suit the rice variety, the soil quality of the field, etc., and can select whether to widen or narrow the diffusion range using a selector switch.In addition, a separate switch operation can be used to switch whether the straw is brought into contact with the cutting device or sent to the straw dropper without contacting it.

JP 2011-223891 A JP 2011-188810 A

In the above-mentioned known example, the switching of the spread width of the waste straw and the switching of whether to cut it or discharge it as it is are separate, and it is necessary to prepare electrical components such as harnesses and couplers for each. This increases the number of electrical components and requires labor to arrange the wiring during maintenance.
The present application provides an improved switch configuration, reduces the number of electrical components, and facilitates maintenance.

In the invention of claim 1, a harvester 4 for harvesting stalks from a field is provided in front of a machine frame 1 equipped with a traveling device 2, a thresher 3 for separating the stalks harvested by the harvester 4 into grains and waste straw is provided, a straw discharge cutter 10 for cutting and discharging the waste straw to be discharged outside the machine is provided behind the thresher 3, and the straw discharge cutter 10 is provided with a width switching device 11 for switching the spreading width of the straw discharge cutter 10 between wide and narrow, in this combine harvester , the switching between wide and narrow spreading widths by the width switching device 11 is performed by a switch 30, and the operating positions of the switch 30 of the width switching device 11 are set to a "wide" position 31 and a "narrow" position 32 for the spreading width, and the operation of the straw discharge cutter 10 is stopped to allow the waste straw to fall as it is. and further, an "automatic" position 34 is set as the operating position of the switch 30 of the width switching device 11; when an auxiliary speed change lever 35 provided in the steering unit 6 and an auxiliary speed change sensor 36 for detecting the operating position of the auxiliary speed change lever 35 detect that the auxiliary speed change lever 35 has been operated to the "lowered" position 37 and the width switching device 11 is operated to the "automatic" position 34, the control unit 29 determines that circular mowing or intermediate splitting is being performed, and when the switch 30 of the width switching device 11 is operated to the "automatic" position 34, the control unit 29 automatically switches the spreading width of the width switching device 11 of the straw discharge cutter 10 to the "narrow" state .
In the invention of claim 2, a harvester 4 for harvesting stalks from a field is provided in front of a machine frame 1 equipped with a traveling device 2, a thresher 3 for separating the stalks harvested by the harvester 4 into grains and waste straw is provided, a straw discharge cutter 10 for cutting and discharging the waste straw to be discharged outside the machine is provided behind the thresher 3, and the straw discharge cutter 10 is provided with a width switching device 11 for switching the spreading width of the straw discharge cutter 10 between wide and narrow, in this combine harvester , the switching between wide and narrow spreading widths by the width switching device 11 is performed by a switch 30, and the operating positions of the switch 30 of the width switching device 11 are set to a "wide" position 31 and a "narrow" position 32 for the spreading width, and the operation of the straw discharge cutter 10 is stopped to discharge the waste straw. The combine is configured to have a "drop" position 33 where the grass is dropped as it is, and further, an "automatic" position 34 is set as the operating position of the switch 30 of the width switching device 11, and the harvesting device 4 is provided with a grass dividing rod operating device 40 which switches the tip position of the grass body 39 of the harvesting device 4 to the left or right, and a grass body sensor 41 which detects the operating position of the grass body 39, and when the grass body sensor 41 detects that the grass body 39 has been operated to the "open (outside the machine body)" side and the width switching device 11 is operated to the "automatic" position 34, the control unit 29 determines that circular cutting or center splitting is being performed, and automatically switches the spreading width of the width switching device 11 of the straw discharge cutter 10 to the "narrow" state .

In the invention of claim 1, the operability is improved because the straw spreading width and the straw cutting can be switched with one width switching device 11. There is no need to provide a switch to change the spreading width of the straw cutter 10 and a switch to turn the straw cutter 10 function on and off (switch between the straw cutter 10 and the dropper 12) as in the conventional case, and the configuration of the electrical system can be simplified.
In the invention of claim 2, there is no need to change the settings of the width switching device 11 every time the width switching device 11 is operated, and the load on the structure for switching the diffusion range by the width switching device 11 can be reduced.
In the invention of claim 3, in working conditions in which discharging straw over a wide area would cause the straw to land on the unharvested stalks and affect harvesting, the width switching device 11 automatically narrows the straw discharge width of the straw discharge cutter 10, thereby improving work efficiency.
In the invention of claim 4, in a working condition in which discharging straw over a wide area would cause the straw to pile up on the stalks before harvesting and affect harvesting operations, the width switching device 11 automatically narrows the straw discharge width of the straw discharge cutter 10, thereby improving work efficiency.
In the invention of claim 5, when the bundling and discharging device 45 is installed, the straw is not cut by the straw cutter 10, so that straw of an appropriate length can be bundled and discharged outside the machine, making it easier to collect the straw and since the straw does not scatter, the straw does not get in the way when harvesting unharvested stalks, improving work efficiency.
In the invention of claim 6, when the sensor plate 51 rotates to a position where it contacts the core of the string roll 50, it determines that the remaining amount of the string 48 has decreased to the point where a bundling error may occur and issues an alert, thereby preventing waste straw that is discharged without being bound due to an insufficient length of the string 48 from being scattered around the field. Also, by preventing the occurrence of unbound waste straw, a decrease in the efficiency of the straw bundle collection work is prevented.

Side view of a combine harvester. Side view of a combine harvester. Top view of a combine harvester. Rear view of a combine harvester. Top, side and rear views of a combine harvester. Top view of a combine harvester. Rear view of a combine harvester. Rear view of a combine harvester. FIG. FIG. 13 is a plan view of another embodiment of the switch. FIG. 13 is a plan view of another embodiment of the switch. Block diagram. Cross-sectional view of the string case. FIG. The same side view. FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG.

One embodiment of the present invention will be explained with reference to the drawings. 1 is a combine body frame, 2 is a running device, and on one side above the running device 2 is a threshing device 3 that separates the cut stalks into grains and straw waste. In front of the threshing device 3 is a harvesting device 4 that harvests stalks from the field to be supplied to the threshing device 3.
In explaining the present invention, in order to facilitate understanding, directions such as front/back, left/right, up/down, etc. will be indicated based on the forward traveling direction of the combine harvester, but this does not limit the configuration of the present invention.
A grain tank 5 is provided on the side of the threshing device 4, and a control unit 6 is provided in front of the grain tank 5.
The configuration of the harvesting device 4 is arbitrary, but as an example, a grass dividing body 7 is provided at the frontmost position, a lifting device 8 for lifting the culms is provided behind the grass dividing body 7, a cutting blade 9 is provided below the lifting device 8, and a transport device is provided behind the lifting device 8 for transporting the culms cut by the cutting blade 9 to the threshing device 3.
The threshing device 3 may have any configuration, but in one example, a threshing chamber 14 having a threshing drum 13 is provided, and a sorting device 15 for sorting grains and straw chips is provided below the threshing chamber 14.

The threshing device 3 is supplied with and transported by a stew supplying device 16 from the stew supplying device 16, and the threshed stew (discarded straw) is passed on from the stew supplying device 16 to a discarded straw transporting device 17 for transporting rearward.
A straw cutter 10 is provided at the rear of the threshing device 3 to cut the waste straw before discharging it outside the machine. A width switching device 11 is provided below the straw cutter 10 to switch the spread width of the waste straw chopped by the straw cutter 10 between wide and narrow. Furthermore, as shown in Figures 1 and 13, a dropper 12 is provided at the right rear side of the machine body to drop the waste straw into the field without chopping it.
The straw discharge cutter 10 is provided at the lower end of the straw discharge conveying device 17. The configuration of the straw discharge cutter 10 is arbitrary, but in one example, a cutter chamber 20 is formed in which a plurality of cutter blades 19 are arranged side by side at a predetermined interval on the left and right sides of the rotating shafts 18 arranged side by side in the front and rear, and the cutter blades 19 of the front and rear rotating shafts 18 are arranged so as to overlap partially in the front and rear direction in a side view, and the straw falling from the straw discharge conveying device 17 is cut and dropped into the field.
Below the straw discharge cutter 10, a width switching device 11 is provided which switches the discharge range (spreading width) into which the cut straw shredded by the straw discharge cutter 10 is discharged.

The width switching device 11 has a variable straw discharge body (diffusion guide plate or diffusion guide rod) 21 in the front-rear direction formed by a pair of left and right axial rod bodies, the base of the variable straw discharge body 21 is rotatably attached to a position switching unit 22 having a switching motor 62 described later, and the tip (rear end) of the variable straw discharge body 21 is formed as a free end. The width switching device 11 rotates the tip position of the variable straw discharge body 21 to the left and right with respect to the position switching unit 22 by the switching motor 62, and when it is positioned on the right side in Figure 9, the cutter diffusion width becomes "wide", and when it is positioned on the left side, the cutter diffusion width becomes "narrow".
The configuration of the dropper 12 is arbitrary, but as an example, the dropper 12 is configured with a front-to-rear guide 23 formed by a pair of left and right axial rod bodies (Figure 3), and the dropper 12 drops the waste straw from the straw waste conveying device 17 into the field as is without bundling it.
As an example, the operating positions of the width switching device 11 are configured to include a ``wide'' position 31 and a ``narrow'' position 32 for the spreading width of the switch 30, as well as a ``dropper'' position 33 which stops the operation of the straw discharge cutter 10 and allows the straw to drop directly.
Therefore, a single width switching device 11 can be used to switch the diffusion width of the discarded straw and to switch whether or not the discarded straw is cut, thereby improving operability.
That is, based on the operating position of the switch 30, the control unit 29 operates each unit to switch the spreading width of the width switching device 11 and switch whether or not to cut the discarded straw (Figure 13).

If the switch 30 is set to the "wide" or "narrow" cutter position, the tip of the variable straw discharge body 21 is rotated left and right relative to the position switching unit 22 by the switching motor 62, changing the range of straw diffusion. At this time, the upper part of the straw discharge cutter 10 is opened by the switching cover 24 described later, and the conveyed straw falls into the cutter chamber 20 and comes into contact with the straw discharge cutter 10 to be chopped.
On the other hand, when it is operated to the "dropper" position 33, the switching cover 24 blocks the top of the straw waste cutter 10, and the straw is released from the dropper 12 to the rear of the machine body without being cut.
In other words, in this harvester, a harvesting device 4 that harvests stalks from the field is provided in front of a body frame 1 equipped with a running device 2, a thresher 3 that separates the stalks harvested by the harvesting device 4 into grains and straw waste is provided, a straw waste cutter 10 is provided behind the thresher 3 that cuts the straw waste before discharging it outside the machine, and the straw waste cutter 10 is provided with a width switching device 11 that switches the spread width of the straw waste cutter 10 between wide and narrow, and the settable operating positions of the width switching device 11 are a "wide" position 31 and a "narrow" position 32 for the spread width, as well as a "drop" position 33 where the operation of the straw waste cutter 10 is stopped and the straw waste is dropped as is.

In other words, the operating positions of the switch 30 of the width switching device 11 include a "wide" position 31 and a "narrow" position 32 for the spreading width, as well as a "drop" position 33 which stops the operation of the straw discharge cutter 10 and allows the straw to drop as is.
Therefore, a single switch 30 can be used to switch the straw diffusion width using the width switching device 11 and to switch whether or not the straw is cut using the switching lid 24, thereby improving operability.
In other words, if two switches were provided as in the conventional method, one to change the spreading width of the straw removal cutter 10 and the other to turn the cutter function on and off (switch between cutter and dropper), the electrical system configuration would become complicated, but the present invention can simplify it.
When the width of the ``drop'' position 33 set at one end of the operating position of the switch 30 of the width switching device 11 is the ``wide'' position 31, the spreading width of the straw discharge cutter 10 set at the adjacent operating position becomes the ``wide'' position 31, and the spreading width of the straw discharge cutter 10 set at the other end of the operating position of the width switching device 11 becomes the ``narrow'' position 32.

That is, "Wide/Narrow" next to "Dropper" determines whether the position of the adjacent switch 30 is "Cutter/Wide" or "Cutter/Narrow."
Therefore, the "dropper position 33" is a state in which the straw discharge cutter 10 is stopped and the straw discharged is transported to the dropper 12 by the straw discharge conveying chain straw discharge conveying device 17.
The wide/narrow setting may be manually switched by an operator.
In addition, when the width of the ``drop'' position 33 set at one end of the operating position of the width switching device 11 is set to the ``narrow'' position 32, the spreading width of the straw discharge cutter 10 set at the adjacent operating position becomes the ``narrow'' position 32, and the spreading width of the straw discharge cutter 10 set at the other end of the operating position of the width switching device 11 becomes the ``wide'' position 31.
Therefore, when operating the switch 30 of the width switching device 11, it is not necessary to change the setting of the width switching device 11 every time, and the load on the diffusion range switching configuration can be reduced.

The operation position of the switch 30 of the width switching device 11 is set to the "automatic" position 34, and when an auxiliary speed change lever 35 provided on the control unit 6 and an auxiliary speed change sensor 36 that detects the operation position of the auxiliary speed change lever 35 detect that the auxiliary speed change lever 35 has been operated to the "decumulated" position 37 and the width switching device 11 is operated to the "automatic" position 34, the combine determines that it is performing circular cutting or intermediate cutting, and automatically switches the width switching device 11 of the straw removal cutter 10 to the "narrow" position 32.
The operation of the auxiliary transmission control lever 35 to the "decumulated" position 37 is performed by detecting the operation position of the auxiliary transmission control lever 35 by an auxiliary transmission detection sensor 36 shown in the plan view of FIG.
In working conditions in which discharging straw over a wide area would result in the straw landing on the unharvested stalks and affecting harvesting, the width switching device 11 automatically narrows the straw discharge width of the straw discharge cutter 10, thereby improving work efficiency.

The operating position of the width switching device 11 is set to the ``automatic'' position 34, and the harvesting device 4 is provided with a grass dividing rod operating device (remote control grass dividing rod) 40 which switches the tip position of the grass dividing body 39 of the harvesting device 4 from left to right, and a grass dividing body sensor 41 which detects the operating position of the grass dividing body 39.When the grass dividing body sensor 41 detects that the grass dividing body 39 has been operated to the ``open (outside the machine body)'' side and the width switching device 11 is operated to the ``automatic'' position 34, it determines that circular cutting or middle cutting is being performed, and the straw discharge cutter 10 is automatically switched to the ``narrow'' position 32.
Therefore, in working conditions in which discharging straw over a wide area would result in the straw landing on the unharvested stalks and affecting harvesting, the width switching device 11 automatically narrows the straw discharge width of the straw discharge cutter 10, thereby improving work efficiency.

A bundling discharge device (knotter) 45 is provided which ties a predetermined amount of waste straw with a string (rope) and discharges it, and a bundling detection means (determined by coupler connection) 46 is provided which detects the installation of the bundling discharge device 45.When the bundling detection means 46 determines that the bundling discharge device 45 is installed and the width switching device 11 is operated to the ``automatic'' position 34, the straw waste cutter 10 is stopped, the upper part of the cutter chamber 20 is closed by the switching lid 24, and the flow path of the waste straw from the straw waste conveying device 17 is switched to ``drop'' 47 (Figure 5).
In other words, when connecting the bundling and discharge device 45 to the control circuit, the coupler of the straw discharge cutter 10 is unplugged to prevent malfunction, or when the bundling and discharge device 45 is connected, the clutch to the straw discharge cutter 10 is maintained in a disengaged state and it is in an inoperative state, and switching between the straw discharge cutter 10 and the bundling and discharge device 45 is performed by closing the top of the cutter chamber 20 with the switching cover 24 provided at the top of the cutter chamber 20, which covers the top of the cutter 10 and blocks the path for the straw to fall, thereby switching the transport path for the straw.

In Figure 3, for ease of understanding, the switching lid 24 has been omitted to expose the cutter 10, but when the switch 30 is switched to the ``drop'' position 33 to use the dropper 12, or when the bundling and discharge device 45 is attached, the switching lid 24 is closed to switch to a state in which the waste straw is transported to the same position as the dropper 12, and the path is switched to one in which the waste straw is transported by the straw transport device 17 toward the bundling and drop position 47.
Therefore, when the bundling and discharging device 45 is installed, the straw is not cut by the cutter 10, so that straw of an appropriate length can be bundled and discharged outside the machine, making it easier to collect the straw.
In addition, since the discarded straw does not scatter, it does not get in the way when harvesting the unharvested stalks, improving work efficiency.

The bundling discharge device (knotter) 45 is provided with a cord detection member 49 that detects the remaining amount of cord 48. The cord detection member 49 is composed of a sensing plate 51 that rotates in contact with the outer periphery of a cord roll 50 around which the cord 48 is wound, and a remaining amount detection body (detection switch) 52 that enters a detection state when the cord roll 50 becomes smaller in diameter and the sensing plate 51 rotates to a predetermined position.
The detection position of the remaining amount detector 52 is on the tangent line between the sensing plate 51 and the core of the string roll 50, and when the remaining amount detector 52 reaches a detection state, it sounds a buzzer or the like to notify the user.
The remaining amount detection body 52 is configured so that when the detection plate 51 rotates in a state where the cord 48 has been reduced to the extent that part of the core of the cord roll 50 is exposed, the detection plate 51 comes into contact with the remaining amount detection body 52 .
Therefore, when the sensing plate 51 rotates to a position where it contacts the core of the string roll 50, it determines that the remaining amount of the string 48 has decreased to the point where a binding error may occur and issues an alert, thereby preventing waste straw that is discharged without being bound because the string 48 is not long enough from being scattered around the field.

In addition, by preventing the occurrence of untied straw, a decrease in the efficiency of the straw bundle collection work is prevented.
The machine is equipped with a cutter dropper switching motor 60 that switches between the straw discharge cutter 10 and the dropper 12, and a guide switching motor 62 that switches between the diffusion guide 61, and switching between the cutter dropper switching motor 60 and the guide switching motor 62 is performed by a single switch 30.
Conventionally, two switches were provided to operate the cutter dropper switching motor 60, which rotates the switching lid 24 to switch between a state in which the top of the cutter chamber 20 in which the straw discharge cutter 10 is housed is opened and a state in which the top of the cutter chamber 20 is closed and the straw is discharged from the dropper 12 at the rear of the machine without being cut, and the guide switching motor 62, which switches the diffusion guide 61 = variable straw discharge body 21, resulting in a large number of wires, high costs, and space requirements.However, with the present invention, this can be performed with a single switch 30, which reduces costs, improves workability and operability, and makes effective use of space.

The switch 30 is a rotary switch having three operating positions: a “wide” position 31 , a “narrow” position 32 and a “dropper” position 33 .
Therefore, this can be achieved by a single switch 30, which reduces costs, improves workability and operability, and allows for effective use of space.
The operation position of the switch 30 is such that the operating angle ranges from -45° to 45°, 90°, when viewed from the front (plan view) (FIG. 10).
In other words, it is switchable to positions of 0°, 45°, and 90°.
Therefore, this can be achieved by a single switch 30, which reduces costs, improves workability and operability, and allows for effective use of space.
The arrangement of the controls (operating positions) will be the same as either the middle control (operating position) or the left or right switching direction.

for example,
Example 1: "Dropper/wide" ⇔ "Cutter/wide" ⇔ "Cutter/narrow"
Example 2: "Dropper/narrow" ⇔ "Cutter/narrow" ⇔ "Cutter/wide"
Let us assume that.
Since the "wide/narrow" indications of the dropper 12 and the "wide/narrow" indications of the cutter 10 are adjacent to each other, when switching the machine from the dropper 12 to the cutter 10, it is possible to determine whether the straw discharge range is wide or narrow.
This allows waste straw to be discharged to an appropriate area depending on the field and variety being harvested, so that the straw can be efficiently returned to the field as nutrients.
For example, when growing wheat as a second crop after harvesting rice, straw waste is spread over a wide area to facilitate decomposition and prevent uneven supply of nutrients.

When growing vegetables in ridges, by limiting the area where straw is scattered to where you plan to make the ridges, you can concentrate nutrients into the soil that will form the ridges and prevent too much nutrients from being supplied to places where weeds are likely to grow, such as the ridge furrows.
On the other hand, when using straw (for crafts, art, etc.), since chopping the straw into small pieces makes it impossible to use it as material, it is either directly discharged into the field using a dropper 12, or bundled using a bundling and discharge device 45 and discharged into the field, and the straw is then collected after the harvesting operation.
Additionally, in areas where rice is grown twice a year after the rice harvest, if the straw is not decomposed to a certain extent, it will decompose and emit gas when water is added for plowing, which could hinder the growth of the planted rice seedlings. Therefore, the straw is collected without being shredded and turned into compost outside the field or used as fuel or materials.
Note that the above is just an example and may vary depending on the region, etc.
In this case, if the operating positions of the switch 30 are "dropper/wide" ⇔ "cutter/wide" ⇔ "cutter/narrow," the middle control can be set to "cutter/wide," which is the more frequently used position, thereby improving operability and workability.

FIG. 11 shows another embodiment of the switch 30, which in a machine (combine) that does not have a spreader guide 61 is configured as a 90° switching rotary switch with two operating positions, a “dropper” position 33A and a “cutter” position 31A.
The operation position of the switch 30 is such that the operating angle ranges from -45° to 45°, which is 90°, when viewed from the front.
Therefore, this can be achieved by a single switch 30, which reduces costs, improves workability and operability, and allows for effective use of space.
The mounting holes of the three-position rotary switch can be used as is, reducing costs, improving workability and operability, and making effective use of space.

FIG. 12 illustrates another embodiment of switch 30, where switch 30 is a four position rotary switch.
The switch 30 has three positions, "dropper/wide" position 33⇔"cutter/wide" position 31⇔"cutter/narrow" position 33, and an additional mode of "automatic" position 34, making it a rotary switch with four operating positions.
In this case, when the switch 30 is in the operating position of the "automatic" position 34 and the sub-speed sensor 36 detects that the sub-speed lever 35 is in the "decumulated" position, it is determined that circular mowing or intermediate cutting is being performed, and each motor is automatically controlled so that the switch 30 is in the same state as the "narrow" position ("cutter/narrow") 32.
Therefore, in working conditions in which discharging straw over a wide area would result in the straw landing on the unharvested stalks and affecting harvesting, the width switching device 11 automatically narrows the straw discharge width of the straw discharge cutter 10, thereby improving work efficiency.

In addition, when the switch 30 is in the “automatic” position 34 and the grass dividing rod operating device 40 is in the “open” position, it is determined that circular mowing or middle mowing is being performed, and each motor is controlled to the “narrow” position (“cutter/narrow”) 32.
Therefore, in working conditions in which discharging straw over a wide area would result in the straw landing on the unharvested stalks and affecting harvesting, the width switching device 11 automatically narrows the straw discharge width of the straw discharge cutter 10, thereby improving work efficiency.
Reference numeral 42 denotes a splitter rod operating motor that operates the splitter rod operating device 40.
When the bundle detection means 46 detects that the bundle discharge device 45 is equipped with the switch 30 in the “automatic” position 34 , each motor is controlled to the “dropper” position 33 .
In this case, when a row-to-row mowing sensor (not shown) provided on the mowing device 4 determines (senses) that the mowing device 4 is "mowing across," it controls each motor to the "wide" position 31.

Therefore, by automatically switching the straw discharge range, the amount of labor required to move in the direction of the next harvesting operation can be reduced, making it easier to move the machine to a position appropriate for the next harvesting operation.
In addition, the monitor 65 provided on the control unit 6 constantly displays the operating status of the straw disposal cutter 10, width switching device 11 and dropper 12.
This improves operability and workability.
In addition, when switching between the cutter dropper switching motor 60 and the guide switching motor 62, the cutter dropper switching motor 60, which switches between the straw removal cutter 10 and the dropper 12, is given priority.
In other words, if the cutter dropper switching motor 60 is not moved first, there is a risk that the shredded straw will fall into the field in a situation where shredding is not desired.On the other hand, even if the operation of the guide switching motor 62 is delayed slightly, the range in which the straw is spread will not change significantly, so there is no problem even if the priority is lowered.
Therefore, by giving priority to the operation of the cutter dropper switching motor 60, it is possible to prevent the straw from being accidentally shredded and falling into the field under working conditions that do not allow the straw to be shredded, thereby preventing a reduction in the amount of straw that can be recovered.

When the switch 30 is changed over, a buzzer 63 notifies the user.
Also, when the contacts of the switch 30 detect a simultaneous ON state, the current position is maintained.
The bundling and discharging device 45 for bundling the harvested and threshed straw is provided with a sensor plate 51 in a string case 66 for sensing the remaining amount of string 48 required for bundling.
That is, the bundling discharge device (knotter) 45 is provided with a cord detection member 49 that detects the remaining amount of cord 48. The cord detection member 49 is composed of a sensing plate 51 that rotates in contact with a cord roll 50 around which the cord 48 is wound, and a remaining amount detection body (detection switch) 52 that enters a detection state when the cord roll 50 becomes smaller in diameter and the sensing plate 51 rotates to a predetermined position.
The elastic force of the spring 67 causes the sensing plate 51 to rotate in accordance with the remaining amount (circumference) of the string roll 50, and the attached remaining amount detector 52 detects when a specified remaining amount is reached.
In the past, when the string ran out, it was possible to detect that the string had broken by detecting it with a string breakage sensor, but at that point a binding error had occurred. However, with the present invention, it is possible to know in advance that the string roll 50 has reached a specified small diameter, making it possible to recognize before the string breaks, preventing binding errors from occurring, and reducing work loss.

A string case 66 for storing the string roll 50 required for bundling is made of a transparent resin plate.
Therefore, the remaining amount of the cord roll 50 can be seen at a glance, and the time to replace the cord roll 50 can be known, thereby reducing the loss of work.
A lifting device 8 for lifting the culms in the field is provided behind the grass body 39 of the harvesting device 4, and a culm guide 71 for guiding the tip side of the lifted culm rearward is provided on the rear side of the lifting device 8, and the culm guide 71 is configured to be detachable without tools to a lifting case 72 of the lifting device 8 or to the lifting frame 73 to which the lifting case 72 is attached.
In the conventional lifting device 8, the lifting case must be opened and closed for maintenance, and the stalk guide must be removed and then reattached after maintenance. However, this is cumbersome because the stalk guide is attached with bolts and nuts.
In the present invention, the stalk guide 71 can be attached and detached without tools, making maintenance of the lifting device 8 easy.

The stalk guide 71 arranged behind the lifting frame 72 is connected to the lifting frame 72 by a round bar and a pin (hairpin) 75.
The stalk guide 71 arranged behind the lifting frame 72 and the lifting frame 72 are inserted into a round pipe 75A and connected by a pin 75 (Figures 17 and 18).
The lifting frame 72 is connected to a stalk guide 71 disposed at the rear of the lifting frame 72 by a rotating hook 76 (FIG. 19).
The stalk guide 71 located at the rear of the lifting frame 72 is connected with a knob bolt 77 (Figure 20).
A hub 78 is placed at the rear of the raising frame 72, and the tip of the stump guide 71 placed behind it is inserted into it to connect to the stump guide 71 (Figure 21).
A hub 79 is placed at the rear of the raising frame 72, and the tips of the two stalk guides 71 placed behind it are inserted into it, thereby connecting the tips of the two stalk guides 71 (Figure 22).
The tip shape of the stalk guide 71 may be a round bar shape or a square bar shape.

The V-shaped stalk guides 71 connected to the adjacent raising frames 72 are configured so as to be split at the valleys of the V.
The V-shaped grain stalk guides 71 connected to the adjacent raising frames 72 are configured so as to be split at the valleys of the V without the use of tools.
The V-shaped stalk guides 71 connected to each of the adjacent raising frames 72 are configured to be connected to a round bar and a pin 75 at the valley of the V.
The V-shaped stalk guides 71 connected to each of the adjacent raising frames 72 are configured to be connected to a round bar and a pin 75 at the valley of the V.
The V-shaped stalk guides 71 connected to each of the adjacent raising frames 72 are configured to be connected to a round pipe and a pin 75 at the valley of the V.
The V-shaped stalk guides 71 connected to each of the adjacent raising frames 72 are configured to be connected by inserting a round bar into a hub 80 at the valley of the V (Figure 23).

1...machine frame, 2...traveling device, 3...threshing device, 4...harvesting device, 5...grain tank, 6...operating section, 8...raising device 8, 9...cutting blade, 10...straw discharge cutter 10, 11...width switching device, 12...dropper, 13...threshing drum, 14...handling chamber, 15...sorting device, 16...grain straw supply device, 17...straw discharge transport device, 18...rotating shaft, 19...cutter blade, 20...cutter chamber, 21...variable straw discharge body, 22...position switching section, 23...guiding guide, 24...switching cover, 30...switch, 31..."wide" position, 32..."narrow" position, 33..."drop (dropper)" position position, 34... "automatic" position, 35... sub-speed change operation lever, 36... sub-speed change sensor, 37... "falling" position, 40... grass division rod operation device, 41... grass division sensor, 45... bundle discharge device, 46... bundle detection means, 47... "drop", 48... string, 49... string detection member, 50... string roll, 51... sensing plate, 52... remaining amount detection body, 60... cutter dropper switching motor, 61... spreading guide, 62... guide switching motor, 65... monitor, 66... string case, 67... spring, 71... culm guide, 72... raising case, 73... raising frame.

Claims (2)

In the combine harvester, a harvesting device (4) for harvesting stalks from a field is provided in front of a machine frame (1) equipped with a traveling device (2), a threshing device (3) for separating the stalks harvested by the harvesting device (4) into grains and waste straw is provided, a straw discharge cutter (10) for cutting and discharging the waste straw to be discharged outside the machine is provided behind the threshing device (3), and the straw discharge cutter (10) is provided with a width switching device (11) for switching the spreading width of the straw discharge cutter (10) between wide and narrow, the switching between wide and narrow spreading widths by the width switching device (11) is performed by a switch (30), and the operating positions of the switch (30) of the width switching device (11) are provided with a "wide" position (31) and a "narrow" position (32) for the spreading width, and the operation of the straw discharge cutter (10) is stopped to allow the waste straw to fall as it is. a "drop" position (33) for allowing the width switching device (11) to move to the "lower" position (37) when an auxiliary speed change operation lever (35) and an auxiliary speed change sensor (36) for detecting the operation position of the auxiliary speed change operation lever (35) provided in the steering unit (6) are used to detect that the auxiliary speed change operation lever (35) has been operated to the "lower" position (37) and the width switching device (11) is operated to the "automatic" position (34), the control unit (29) determines that circular mowing or intermediate splitting is being performed, and when the switch (30) of the width switching device (11) is operated to the "automatic" position (34), the control unit (29) automatically switches the spreading width of the width switching device (11) of the straw discharge cutter (10) to the "narrow" state. In the combine harvester, a harvesting device (4) for harvesting stalks from a field is provided in front of a machine frame (1) equipped with a traveling device (2), a threshing device (3) for separating the stalks harvested by the harvesting device (4) into grains and waste straw is provided, a straw discharge cutter (10) for cutting and discharging the waste straw to be discharged outside the machine is provided behind the threshing device (3), and the straw discharge cutter (10) is provided with a width switching device (11) for switching the spreading width of the straw discharge cutter (10) between wide and narrow, the switching between wide and narrow spreading widths by the width switching device (11) is performed by a switch (30), and the operating positions of the switch (30) of the width switching device (11) are provided with a "wide" position (31) and a "narrow" position (32) for the spreading width, and the operation of the straw discharge cutter (10) is stopped to discharge the waste straw. a "drop" position (33) for allowing the grass to fall as it is, and further, an "automatic" position (34) is set as the operating position of the switch (30) of the width switching device (11), and the harvesting device (4) is provided with a grass dividing rod operating device (40) for switching the tip position of the grass body (39) of the harvesting device (4) to the left or right, and a grass body sensor (41) for detecting the operating position of the grass body (39), and when the grass body sensor (41) detects that the grass body (39) has been operated to the "open (outside the machine body)" side and the width switching device (11) is operated to the "automatic" position (34), the control unit (29) determines that circular cutting or center cutting is being performed, and automatically switches the spreading width of the width switching device (11) of the straw discharge cutter (10) to the "narrow" state.

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