JP2003079223A - Reaping harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reaping harvester with which the contact of a reaping and conveying unit with a traveling road can be avoided in up-and-down traveling and rotary operation at a butt is simplified without delay. SOLUTION: In this reaping harvester in which the reaping and conveying unit 3 is liftably around a central axis P1 in the right and left direction connected to a traveling machine body 2, the harvester is equipped with a rise and fall operation mechanism 45 which raises the reaping and conveying unit 3 by power transmitted through a transmission state switching mechanism 44 and stops the rise of the reaping and conveying unit 3 by transmission blocking by the transmission state switching mechanism 44, a machine type connection mechanism 63 which changes the transmission state switching mechanism 44 from a transmission state to a blocking state in linking to the arrival of the reaping and conveying unit 3 to a fixed height position from the reaping and conveying unit 3 to the transmission state switching mechanism 44 and a stop height switching mechanism 66 changes the height position of the reaping and conveying unit 3, with which the connection mechanism 63 switches the transmission state switching mechanism 44 from a transmission state to a blocking state, from the upper limit position to a nonoperation position lower than the upper limit position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting and harvesting machine in which a cutting machine is connected to a traveling machine body so that the cutting machine can be raised and lowered around a horizontal axis.

[0002]

2. Description of the Related Art Conventionally, in the above harvesting and harvesting machine, the mowing and conveying device is constructed so as to automatically ascend and stop only when it reaches a predetermined upper limit position, and the predetermined upper limit position is The height of the reaper was set to a level that avoids contact with the road surface such as the ridge slope and the step board of the reaper carrying device when traveling up and down the hill while running on the ridge slope or on the step board handed over to the truck bed. .

[0003]

Therefore, according to the above-mentioned prior art, at the edge of the work running, the reaping and conveying device is once raised from the working position to change the direction of the machine body, and then the reaping and conveying device is lowered. When performing headland turning such as returning to the work position again by using a raising operation that automatically stops the mowing and conveying device at a predetermined upper limit position in order to simplify the operation, the mowing and conveying device can By raising to a height position that can avoid unnecessary contact with running road surfaces such as ridge slopes and step boards during turning, the time required to lower the reaping and transporting device to the working position after turning becomes longer, There was a problem that work was delayed.

In order to avoid this work delay, it is necessary to grasp the rising state of the mowing and conveying device and manually stop the cutting and conveying device at an appropriate rising position when turning the headland. It took a lot of effort and skill.

An object of the present invention is to avoid contact of the reaping and conveying device with the traveling road surface during traveling uphill and downhill, and to simplify the headland turning operation without causing work delay. .

[0006]

[Means for Solving the Problems] [Structure] In order to achieve the above-mentioned object, in the invention according to claim 1 of the present invention, the reaping and conveying device is connected to the traveling machine body so as to be capable of moving up and down around a laterally oriented axis. In the harvesting and harvesting machine, the raising / lowering operation of raising the reaping / conveying device by the power transmitted through the transmission state switching mechanism, and stopping the raising of the reaping / conveying device by the transmission interruption by the transmission state switching mechanism. A mechanical system that is equipped with a mechanism and that switches the transmission state switching mechanism from the transmission state to the cutoff state in association with reaching the predetermined height position of the harvesting and conveying device over the cutting and conveying device and the transmission state switching mechanism. A linkage mechanism is installed, and the height position of the reaping and conveying device that switches the transmission state switching mechanism from the transmission state to the cutoff state by the linkage mechanism is switched between an upper limit position and a non-working position lower than the upper limit position. Replace stop height switching mechanism equipped with.

[Operation] According to the first aspect of the present invention, when performing uphill / downhill traveling in which the vehicle travels on a ridge slope or a step board handed over to a truck bed, a stop height switching mechanism is used for linkage. The mechanism switches the transmission state switching mechanism from the transmission state to the shut-off state.If the height position of the harvesting and conveying device is switched to the upper limit position, the harvesting and conveying device can be used for raising the harvesting and conveying device before starting uphill / downhill traveling. By the action of the elevating operation mechanism and the linking mechanism, the device can be automatically stopped at the upper limit position where contact with the traveling road surface such as the ridge slope and the step board of the reaping and conveying device can be avoided.

Further, when the work traveling is performed in the field, the stop height switching mechanism causes the linkage mechanism to switch the transmission state switching mechanism from the transmission state to the cut-off state. If switched, the mowing and transporting device will be used when raising the mowing and transporting device at the start of headland turning.
Due to the action of the lifting operation mechanism and the linkage mechanism, it can be automatically stopped at a non-working position that is lower than the upper limit position and can reduce the time required to lower the reaping / conveying device to the working position after the direction is changed. Become.

Furthermore, when performing non-working traveling on a field or on a road, the stop height switching mechanism causes the linkage mechanism to switch the transmission state switching mechanism from the transmission state to the cut-off state. If you switch to the position, when raising the reaping transport device before starting non-working travel,
The reaping / conveying device can be automatically stopped at a non-working position which is lower than the upper limit position and has high stability during traveling by the action of the lifting operation mechanism and the linking mechanism.

Moreover, since the mechanical mechanism, which is cheaper than the electric mechanism which requires the sensor and the control device, is adopted as the linkage mechanism, the manufacturing cost can be reduced.

[Effect] Therefore, while reducing the manufacturing cost, it is possible to avoid contact of the cutting and conveying device with the traveling road surface during traveling uphill and down, and simplify the headland turning operation without causing work delay. In addition to being able to achieve this, it has become possible to improve the stability during non-working traveling with a simple operation.

[Structure] In the invention according to claim 2 of the present invention, in the invention according to claim 1, one end side of the linkage mechanism is pushed up as the cutting and conveying device is raised, With the arrival of the cutting and conveying device at a predetermined height position, the other end side is composed of a balance arm for switching the transmission state switching mechanism from the transmission state to the cutoff state,
The stop height switching mechanism pushes up the balance arm as the cutting and conveying device moves upward, and vertically swings with one end side of the balance arm as a left-right supporting shaft, whereby the reference attitude of the balance arm is obtained. The other end side of the balance arm is constituted by a U-shaped metal fitting for switching the height position of the harvesting and conveying device for switching the power transmission state switching mechanism from the power transmission state to the cutoff state.

[Operation] According to the invention described in claim 2, when the U-shaped metal fitting is oscillated downward with one end side thereof as a support shaft, the U-shaped metal fitting is displaced downward and The standard posture of the balance arm is changed to one in which one end side (U-shaped metal fitting side) is lowered and the other end side (transmission state switching mechanism side) is raised, and the other end side of the balance arm is transmitting the transmission state switching mechanism. Since the height position of the reaping and conveying device that is switched from the above state to the cutoff state is high, the reaping and conveying device can be automatically lifted and stopped at the upper limit position. On the contrary, when the U-shaped metal fitting is displaced upward with the one end side thereof as the support shaft, the U-shaped metal fitting is displaced upward and the reference attitude of the balance arm is the one end side (U-shaped metal fitting). Side) is raised and the other end side (transmission state switching mechanism side) is changed to a posture in which the other end side of the balance arm switches the transmission state switching mechanism from the transmission state to the cutoff state. Since the height is lowered, the harvesting and conveying device can be automatically lifted and stopped at the non-working position lower than the upper limit position.

That is, the linkage mechanism is composed of a balance arm,
With a simple structure that the stop height switching mechanism is composed only of U-shaped metal fittings, the height position where the mowing and conveying device automatically rises and stops can be easily set without using a tool, and the upper limit position and a lower position lower than that. It becomes possible to reliably switch to the working position.

[Effect] Therefore, while the simplification of the structure and the reduction of the manufacturing cost are achieved, the height position at which the reaping and conveying device is automatically raised and stopped can be easily and surely switched according to the situation. It was

[0016]

1 shows an overall left side surface of a self-removing combine, which is an example of a harvester, FIG. 2 shows an overall right side surface thereof, and FIG. 3 shows an overall plane surface thereof. In this combine, the harvesting / conveying device 3 is connected to the front left side of the traveling machine body 2 including the pair of left and right crawler type traveling devices 1 so as to be vertically movable around the axis P1 in the left-right direction, and A boarding operation unit 6 including a control tower 4 and a driver's seat 5 is formed on the right side of the section, and the harvesting and conveying device 3 in the traveling machine body 2 is formed.
And a rearing position of the boarding operation unit 6 is equipped with a threshing device 7 that performs threshing processing, sorting processing, and the like on the harvested culms from the harvesting and conveying device 3, and at a left rear position of the threshing device 7 in the traveling machine body 2, Equipped with a waste straw cutting device 8 that shreds waste straw from the threshing device 7, and a grain that is conveyed from the threshing device 7 via a lifting conveyor 9 to the right rear position of the threshing device 7 in the traveling machine body 2. It is configured by arranging a bag packing device 11 for packing the grain bag 10 into the grain bag 10.

As shown in FIGS. 1 to 5, the harvesting and conveying device 3
Is a horizontal axis P on the body frame 12 of the traveling body 2.
1. On a mowing frame 13 which is supported so as to be able to move up and down around one, three dividers 14 for scooping overlaid planted grain culms, left and right raising devices 15 for piling up laid down planted grain culms, and the root side of planted grain culms A clipper-type reaper 16 for cutting and a conveyer 17 for changing the posture from a vertical posture to a horizontal posture while conveying the cut culm backwards, and so on, so as to carry out two-row cutting and conveying. Is configured.

As shown in FIG. 6, in the threshing device 7, a feed chain 18 disposed on the left outer side of the threshing device 7 holds the stock side of the cut culm from the carrying device 17 and conveys it backward. The tip of the cut culm guided by the feed chain 18 is guided by the feed chain 18 on the net 20 when the handling cylinder 19 provided in the left half of the threshing device 7 rotates around the axis P2 in the front-back direction. The threshing process is performed on the side, and the Karato 21 arranged at the lower left of the handling cylinder 19 rotates around the axial center P3 in the front-rear direction and supplies the sorting wind that flows toward the right side. The processed material leaked from the receiving net 20 by the treatment is subjected to a wind sorting process, and the swing sorting mechanism 22 arranged below the receiving net 20 is rotated in the left-right direction by the rotation of the drive shaft 23 facing forward and backward. By the swing drive, the processed products supplied to the swing selection mechanism 22 are moved to the right. By performing a sieving / sorting process on the processed product while transporting, the No. 1 screw 24 arranged on the upper side in the sorting direction below the swing sorting mechanism 22 rotates around the axis P4 in the front-rear direction. , Swing selection mechanism 2
Grain that has leaked from the right side of the sorting direction of 2 is a feeding conveyor 9
The No. 2 screw 25, which is conveyed to the lower side of the swing sorting mechanism 22 and is disposed on the lower side in the sorting direction below the swing sorting mechanism 22, rotates about the axis P5 in the front-rear direction.
In the sorting direction, a mixture of grains and broken straw that leaked from the lower side is conveyed toward the processing product transfer mechanism 26 of the thrower type, and the thrower blade 27 of the processing product transfer mechanism 26 is integrated with the No. 2 screw 25. By rotating, the mixture is reduced on the receiving net 20 and reprocessed.

As shown in FIGS. 2 and 6, of the processed products, the swing sorting mechanism 22 does not leak from the swing sorting mechanism 22.
Dust such as cut straws and scraps transported to the rear edge of the
It is designed to be discharged from a dust outlet 28 formed on the right side surface of the threshing device 7, which is on the side of the boarding operation unit 6, whereby dust such as straw waste discharged from the threshing device 7 is not cut. It is possible to reliably prevent the inconvenience of falling on the grain, and thus to avoid a decrease in the sorting performance and the sorting efficiency due to the dust that has fallen on the uncut grain culm being supplied to the threshing device 7 together with the cut grain culm. It has become.

As shown in FIG. 7, the discharge straw cutting device 8 has a first roll 29 which rotates about a horizontal axis P6.
In addition, a locking pin 30 equipped so as to move in and out according to the rotation locks the left and right discharge straws from the feed chain 18 at an intermediate portion thereof and is adjacent to the first roll 29, and left and right. It is folded in two in a pine needle shape by scraping it toward the second roll 31 which rotates around the axis P7 of the direction, and the pine needle-shaped discharge straw is arranged below them by the rotation of each roll 29, 31. Fixed blade 32 and left-right axis P
By feeding toward the rotary blade 33 that rotates around 8,
A cylindrical cutter is used that shreds in order from the refraction end of the discharge straw, which makes it possible to compare the case where a disc-shaped cutter that receives left and right discharge straws in its posture and shreds with multiple disks is used. Then, the left-right length of the installation space required for the installation of the straw discharging device 8 behind the threshing device 7 can be significantly reduced, and the installation space of the bagging device 11 can be increased in the left-right direction accordingly. You can do it.

As shown in FIGS. 1 to 3, the bag filling device 11 includes a mounting table 34 formed on the right rear portion of the traveling machine body 2 and a support frame 35 standing on the front portion of the mounting table 34. Two pairs of left and right support rods 3 extending leftward and rightward.
Two bag type in which the grain from the lifting conveyor 9 is guided and fed into the left and right grain bags 10 supported by 6 and 6 by the left and right bifurcated discharge cylinders 37 connected to the transport end of the lifting conveyor 9. This is adopted, and the bag packing work efficiency can be improved as compared with the case where the one-bag type is adopted.

As described above, in short, since the swing selecting mechanism 22 having a length longer than that of the handling cylinder 19 is disposed in the left-right direction, as compared with the case where the swing selecting mechanism 22 is disposed in the front-rear direction,
The front-rear length of the threshing device 7 can be shortened, and the waste straw cutting device 8 arranged at the left rear part of the threshing device 7 adopts a cylindrical cutter capable of saving space. At the right rear part of the threshing device 7, a two-bag type bagging device 11 capable of improving the bagging work efficiency is arranged in a horizontally long posture in which the grain bags 10 are arranged side by side, which reduces the working capacity. Without inviting them, it is possible to shorten the front-rear length of the traveling body 2 on which they are mounted and to reduce the weight thereof, and accordingly, the total length of the combine can be shortened and the total weight can be reduced. Can
Therefore, even though it is a passenger type equipped with the boarding operation unit 6, it can be loaded on the bed of a light truck, and even in a field such as a mountainous area where transportation is limited to a light truck due to road conditions and the like, work can be performed. It is possible to use a high-performance riding type combine.

As a result, it is not necessary to walk through a muddy field for cutting and harvesting as in the case of using a walk-behind combine, and the position of the cutting / transporting device 3 and the position of the planted culm to be cut are matched. Since it becomes possible to easily perform the striping work and the like, it is possible to reduce the labor and improve the workability when performing the cutting and harvesting work.

Further, it is possible to avoid the imbalance of the left-right balance caused by the storage amount of the bagging device 11 that occurs when the threshing device 7 and the bagging device 11 are arranged side by side in the left-right direction, and the weight is heavy. Since it is not necessary to equip the bagging device 11 with a balance weight in order to achieve a balance with the threshing device 7, it is possible to further reduce the weight while improving the stability of the machine body.

Moreover, in shortening the total length of the combine, it is not necessary to close the space between the mowing / conveying device 3 and the threshing device 7, so that the mowing culm can be changed to a suitable posture for the threshing device 7. Since it is possible to easily secure the required length between the mowing device 16 of the mowing and conveying device 3 and the threshing device 7, there is no adverse effect on the threshing process, and the mowing culms are threshed. Pillow handling work for manually supplying the device 7 can be performed well.

As shown in FIGS. 2 to 5 and 8, an engine 38 is mounted below the driver's seat 5 of the traveling machine body 2 with the output shaft 39 of the engine 38 facing forward and backward. Power of the input shaft 4 of the transmission case 41 via the belt tension type main clutch 40.
2 to the threshing device 7 via the belt tension type threshing clutch 43, and further via the belt tension type elevating clutch 44 which is an example of the transmission state switching mechanism 44. Is transmitted to an elevating / lowering operation mechanism 45 for elevating / lowering.

As shown in FIG. 9, the mission case 41
The gear type transmission mechanism 46 capable of switching the power transmitted to the input shaft 42 between forward power and reverse power and capable of shifting the forward power in three stages, and the gear type transmission mechanism 46.
The transmission state in which the power after shifting from the vehicle is transmitted to the corresponding crawler type traveling device 1, the shut-off state in which the power after shifting is not transmitted to the corresponding crawler type traveling device 1, and the corresponding crawler type traveling device 1 is braked. A pair of left and right side clutch brakes 47 and the like, which are configured to be switchable between a braking state for stopping and a braking state, are incorporated. The side clutch brakes 47 are urged by springs 48 to return to the transmission state.

An operating arm 49 of each side clutch brake 47 is linked to an operating lever 50 (see FIGS. 1 to 3) mounted on the control tower 4 via a linking mechanism for steering operation (not shown). When the operating lever 50 is operated to the neutral position, the springs 48 urge both of them to be in a transmission state, which reveals a straight traveling state in which the left and right crawler type traveling devices 1 are driven at a constant speed, and is operated. When the lever 50 is operated in either the left or right direction from the neutral position, the corresponding side switches from the transmission state to the cutoff state or the braking state against the bias of the spring 48, depending on the operation amount. The crawler type traveling device 1 is allowed to freely rotate, or the one crawler type traveling device 1 is braked to stop suddenly.

As shown in FIG. 4, FIG. 5, FIG. 8, FIG. 10 and FIG. 11, in the lifting operation mechanism 45, the power from the engine 38 is transmitted through the lifting clutch 44 to the chain type transmission mechanism 51.
The screw shaft 52 is driven to rotate in the normal direction by the power of the engine 38 to raise the reaping and conveying device 3, and the lifting clutch 44 cuts off the power from the engine 38 to cut the reaping and conveying device 3.
The screw shaft 52 rotates in the reverse direction to lower the reaping / conveying device 3, and the output pulley 5 of the lifting clutch 44 in the disengaged state.
When the braking arm 54 is engaged and joined to the screw 3, the rotation of the screw shaft 52 is stopped, so that the cutting and conveying device 3 is stopped to move up and down. The lead angle of the screw shaft 52 and the female screw member 55 screwed to the screw shaft 52 is set to a large angle at which the screw shaft 52 can be reversed by the weight of the cutting and conveying device 3.

The braking arm 54 and the tension arm 56 of the lifting clutch 44 are linked to the operating lever 50 via a linking mechanism 58 for linking up and down, which is composed of a linking wire 57 and the like. The braking arm 54 is urged to join the output pulley 53 by the first spring 59. When the braking arm 54 is joined to the output pulley 53 by the urging force of the first spring 59, the output pulley 53 is allowed to rotate in the normal direction by the power from the engine 38 and cut. The reverse rotation of the output pulley 53 due to the weight of the transport device 3 is prevented. The tension arm 56 is cut and biased by the second spring 60.

With this structure, when the operation lever 50 is operated to the neutral position, the elevating operation mechanism 45 allows the braking arm 54 to be joined to the output pulley 53 of the elevating clutch 44 by the urging of the first spring 59. , The second spring 6
By allowing the cutting operation of the tension arm 56 by the urging force of 0, the cutting and conveying device 3 is stopped up and down, and when the operation lever 50 is operated from the neutral position to the front lower position,
By separating the braking arm 54 from the output pulley 53 against the bias of the first spring 59 and allowing the screw shaft 52 to reversely rotate due to the weight of the reaping and conveying device 3, the reaping and conveying device 3 is moved downward and the reverse direction. When the operation lever 50 is operated from the neutral position to the rearwardly raised position, the tension arm 56 is operated against the bias of the second spring 60, and the screw shaft 52 is normally rotated by the power from the engine 38. By doing so, the harvesting and conveying device 3
Is designed to rise.

That is, the raising / lowering operation mechanism 45 is connected to the engine 3
The forward rotation of the screw shaft 52 by the power from 8 and the reverse rotation of the screw shaft 52 due to the weight of the cutting and conveying device 3 cause the cutting and conveying device 3 to rotate.
Since it is configured as a screw feed type that swings up and down,
Compared with the case of a hydraulic system that requires a hydraulic pump, a hydraulic cylinder, etc., the manufacturing cost and maintenance cost can be reduced and maintenance can be facilitated.

As shown in FIG. 4, FIG. 5, FIG. 8, FIG. 10 and FIG. 12, the machine frame 12 has a balance extending over the U-shaped metal fitting 61 mounted on the mowing frame 13 and the tension arm 56 of the lifting clutch 44. An arm 62 is swingably connected around a left-right axis P9, and this balance arm 62 is on the side of the mowing frame 13 which is one end of the balance conveying device 3 when reaching the predetermined height position. End portion 62a
Is pushed up by the U-shaped metal fitting 61, the other end side is the end portion 62b of the machine frame 12 side.
However, the tension arm 56 of the elevating clutch 44, which is operated by the operation lever 50, is turned off.

That is, the balance arm 62 constitutes a mechanical linkage mechanism 63 for switching the elevating clutch 44 from the transmission state to the disconnection state in association with the arrival of the reaping and conveying device 3 at a predetermined height position. With this, as the reaper-conveying device 3 reaches the predetermined height position, the reaper-conveying device 3 can be automatically lifted and stopped, and the linkage mechanism 63 requires a relatively expensive sensor or control device. The manufacturing cost can be reduced as compared with the case of using the electric type.

Reference numeral 64 shown in FIGS. 4 and 10 is a biasing spring for biasing one end side 62a of the balance arm 62 against the U-shaped metal fitting 61, and reference numeral 65 shown in FIG. 5 is an operating lever. This is a spring that allows the tension arm 56 of the elevating clutch 44 that is engaged and disengaged by 50 to be cut by the balance arm 62.

The U-shaped metal fitting 61 has its one end side 61a pivoted up and down to change the reference posture of the balance arm 62 so that the other end side 62b of the balance arm 62 has the lifting clutch 44. Is configured to switch the height position of the harvesting and conveying device 3 that switches the transmission state from the transmission state to the cutoff state. In the state in which the one end side 61a is pivotally operated downward (see FIG. 4), U Since the metal bracket 61 is displaced downward, the reference posture of the balance arm 62 becomes
The one end side 62a is lowered and the other end side 62b is raised, and the other end side 62b of the balance arm 62 switches the lifting clutch 44 from the transmission state to the cutoff state. Therefore, the harvesting and conveying device 3 can be automatically lifted and stopped at the upper limit position. On the contrary, in the state in which the one end side 61a is pivotally operated upward as the support shaft (see FIG. 10),
Since the U-shaped metal fitting 61 is displaced upward, the reference posture of the balance arm 62 is changed to the posture in which one end side 62a thereof is raised and the other end side 62b thereof is lowered, and the other end side of the balance arm 62 is changed. 62b lowers the height position of the harvesting and conveying device 3 at which the lifting clutch 44 is switched from the transmission state to the disengagement state,
Therefore, the reaping and conveying device 3 can be automatically lifted and stopped at a non-working position lower than the upper limit position.

That is, the U-shaped metal fitting 61 is used for the harvesting and conveying device 3.
Is a stop height switching mechanism 66 for switching the height position at which the reaping and conveying device 3 is automatically stopped during the ascending operation to the upper limit position and a non-working position lower than the upper limit position, and the linkage mechanism 63 is composed of the balance arm 62. However, if the stop height switching mechanism 66 is composed of the U-shaped metal fittings 61 and has a simple structure, in the case of performing uphill / downhill traveling for traveling on a ridge slope or on a step board handed over to a truck bed, U If the metal fitting 61 is displaced downward, the other end side 62b of the balance arm 62 switches the lifting clutch 44 from the transmission state to the cut-off state. Therefore, when the reaping and conveying device 3 is raised before starting the uphill / downhill traveling, the reaping and conveying device 3 is automatically set at the upper limit position where contact with the traveling road surface such as a ridge slope or a step board can be avoided. Can be stopped, , When working travel in the field, if so allowed to displace the U-shaped bracket 61 on the upper side, lifting the other end 62b of the balance arm 62 clutch 44
The height position of the mowing and conveying device 3 for switching the power transmission state from the transmission state to the shutoff state can be set to a non-working position lower than the upper limit position, and thus the mowing and conveying device 3 at the start of headland turning.
During the ascending operation, the reaper carrying device 3 can be automatically stopped at a non-working position which is lower than the upper limit position and can shorten the time required to lower the reaping carrying device 3 to the working position after the direction is changed. Further, when the non-working traveling is performed in the field or on the road, if the U-shaped metal fitting 61 is displaced upward, the other end side 62b of the balance arm 62 disconnects the lifting clutch 44 from the transmission state. The height position of the reaping and conveying device 3 that is switched to the state can be set to a non-working position lower than the upper limit position, so that when the reaping and conveying device 3 is raised before starting non-working traveling, the reaping and conveying device 3 3
It can be automatically stopped at a non-working position that is lower than the upper limit position and has high stability during traveling.

As shown in FIGS. 4, 8, 10 and 13, the balance arm 62 is structured such that the other end side 62b thereof can be adjusted in angle around the axis P10 of the left and right direction, whereby the balance arm 62 is adjusted. The other end side 62b of the arm 62 can finely adjust the height position of the reaping and conveying device 3 that switches the lifting clutch 44 from the transmission state to the cutoff state.

[Other Embodiments] Other embodiments of the present invention will be listed below. (1) The raising / lowering operation mechanism 45 is equipped with a forward / reverse switching mechanism for driving the screw shaft 52 in the forward / reverse direction with power from the engine 38, so that the harvesting and conveying device 3 is not powered down by its own weight but with power from the engine 38. Alternatively, the screw shaft 52 may be configured to be downwardly oscillated by the reverse drive. (2) As the raising / lowering operation mechanism 45, a prime mover such as an electric motor for driving the screw shaft 52 in the forward / reverse direction is equipped, and the reaping / conveying device 3 is driven by the forward / reverse drive of the screw shaft 52 by the power from the prime mover. It may be configured to move up and down. (3) As the transmission state switching mechanism 44, a friction clutch, a dog clutch, or the like may be adopted. (4) The raising / lowering operation mechanism 45 may be configured to raise / lower the reaping / conveying device 3 by reversing the internal thread member 55. (5) The mechanical linkage mechanism 63 is arranged so that the transmission state switching mechanism 44 is switched from the transmission state to the cutoff state in association with the arrival of the cutting and conveying device 3 at the predetermined height position.
It may be configured by a linking wire or a linking rod that links the transmission state switching mechanism 44 with the linking wire. (6) The first mounting position at which the stop height switching mechanism 66 is automatically stopped at the upper limit position of the mowing and conveying device 3, and the mowing and conveying device 3.
Second automatic stop at a non-working position lower than the upper limit position
The mounting position may be configured by a locking pin or the like that can be replaced with respect to the mowing frame 13. (7) The stop height switching mechanism 66 may be provided on the one end side 62a or the other end side 62b of the balance arm 62, the tension arm 56 of the lifting clutch 44, or the like.

[Brief description of drawings]

FIG. 1 Left side view of the whole combine

FIG. 2 is an overall right side view of the combine.

FIG. 3 is an overall plan view of the combine

FIG. 4 is a vertical cross-sectional side view of an essential part showing a lifting operation structure of the reaping and conveying device.

FIG. 5 is a rear view of the main part showing the lifting operation structure of the reaping and conveying device.

FIG. 6 is a vertical sectional rear view showing the configuration of the threshing device.

FIG. 7 is a vertical sectional side view of the discharge straw cutting device.

FIG. 8 is a developed sectional view showing a part of the transmission structure.

FIG. 9 is a vertical sectional rear view of the mission case.

FIG. 10 is a vertical cross-sectional side view of essential parts showing the configuration of a stop height switching mechanism.

FIG. 11 is a vertical cross-sectional side view of essential parts showing a configuration of a screw feeding part of the lifting operation mechanism.

FIG. 12 is a perspective view of a main part showing a configuration of a stop height switching mechanism.

FIG. 13 is a perspective view of a main part showing a configuration of a linkage mechanism.

[Explanation of symbols]

2 traveling aircraft 3 Mowing and transporting device 44 Transmission state switching mechanism 45 Lifting operation mechanism 61 U-shaped bracket 61a One end side 62 balance arm 62a One end side 62b The other end side 63 Linkage mechanism 66 Stop height switching mechanism P1 axis center

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kenichi Terasaka             64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubo Co., Ltd.             Ta Sakai Factory F term (reference) 2B076 AA03 CA04 CA19 DA01 DD02                 2B304 KA08 LA02 LA13 LB02 LB20                       MA02 MB03 MC06 PC07 QA24                       QB12 RA05

Claims (2)

[Claims] 1. A reaper harvesting machine, comprising a traveling machine body and a reaper carrying apparatus connected thereto so as to be capable of moving up and down about a lateral axis, wherein the reaper carrying apparatus is driven by power transmitted through a transmission state switching mechanism. Equipped with an elevating and lowering operation mechanism that raises and stops the raising of the reaping / conveying device by transmission interruption by the transmission state switching mechanism, and the predetermined height of the reaping / conveying device is provided over the reaping and conveying device and the transmission state switching mechanism. A mechanical linkage mechanism that switches the transmission state switching mechanism from the transmission state to the cutoff state in synchronization with the arrival of the cutting position, and the cutting mechanism switches the transmission state switching mechanism from the transmission state to the cutoff state. A harvesting harvester equipped with a stop height switching mechanism that switches the height position of the transfer device between an upper limit position and a non-working position lower than the upper limit position. 2. The linkage mechanism is pushed up at one end side as the reaping and conveying device rises, and at the other end side as the transmission state switching mechanism as the reaping and conveying device reaches a predetermined height position. Is constituted by a balance arm for switching from a transmission state to a cutoff state, and the stop height switching mechanism pushes up the balance arm as the reaping / conveying device rises, and one end side of the balance shaft is oriented to the left and right. By changing the standard posture of the balance arm,
2. The mowing harvester according to claim 1, wherein the other end of the balance arm is composed of a U-shaped metal fitting for switching the height position of the mowing and conveying device for switching the transmission state switching mechanism from the transmission state to the cutoff state.