JP2014068569A - Corn harvester - Google Patents

Abstract

A corn harvester is provided which can easily avoid a residue processing device provided in a lower part of a vehicle body from being pushed into the soil.
A residue processing device 7 provided so as to be movable up and down with respect to a traveling vehicle body 3, an actuator C3 capable of moving the residue processing device 7 up and down, and a residue processing device 7 are lifted up and biased. Ascending force imparting means J is provided.
[Selection] Figure 5

Description

  The present invention relates to a corn harvester adapted to harvest a crop with a large number of seeds from corn.

  The corn harvester is designed to harvest the harvested object from the corn that is being planted while running the traveling vehicle body, and to perform processing such as chopping the stalks remaining in the field finely (For example, refer to Patent Document 1).

  In Patent Document 1, the stem portion remaining in the field is cut at a low position and conveyed backward while being shredded by a shredding device mounted on the machine body and discharged to the field. Instead of this, there is a type in which the stem portion remaining in the field is not cut, but is directly shredded by a residue processing device provided at the lower part of the vehicle body. In addition, as a configuration in which the residue processing device is provided in the lower portion of the vehicle body, the vehicle body support portion and the residue processing device are pivotally connected via an actuator such as a hydraulic cylinder and a linkage mechanism, for example, so that the residue can be moved up and down. It was the structure which supports the soot processing apparatus.

JP 2011-92135 A

  In the configuration in which the residue processing device is provided at the lower portion of the vehicle body, in the configuration in which the vehicle body support portion and the residue processing device are pivotally connected, the residue treatment device is caused by the unevenness of the field as the vehicle travels. In such a case, there is a high possibility that the residue processing device will rush into the ground and be buried in the soil. When the residue processing device is buried in the soil in this way, there is a disadvantage that the driving load becomes abruptly increased, the engine load becomes excessive, and the harvesting operation cannot be performed satisfactorily.

  By the way, when the residue processing device comes into contact with the convex portion of the ground, for example, it is attempted to avoid the residue processing device from being pushed into the soil by an actuator driving operation based on a manual command. In many cases, the operation by the actuator based on such a manual command tends to be delayed, and it is difficult to avoid the residue processing device being pushed into the ground as the vehicle body travels.

  An object of the present invention is to provide a corn harvesting machine in which a residue treatment device provided at a lower portion of a vehicle body is less likely to plung into the soil.

  The characteristic configuration of the corn harvesting machine according to the present invention includes a residue processing device provided to be movable up and down with respect to a traveling vehicle body, an actuator that can drive the residue processing device up and down, and the residue processing device ascending side. And a lifting force applying means for lifting and biasing.

  According to the present invention, the residue processing device is provided so as to be movable up and down with respect to the traveling vehicle body, and the actuator capable of driving and raising the residue processing device is provided. In other words, when the residue processing device is largely raised or lowered, it can be favorably performed by operating the actuator.

  And, since there is provided a lifting force applying means for lifting and biasing the residue processing device to the ascending side, the residue processing device provided at the lower part of the vehicle body is in contact with the convex portion of the ground during the vehicle running Even so, the residue treatment device can be lifted while easily following the convex portion of the ground by the lifting urging force by the lifting force urging means, and the residue treatment device is less likely to plung into the soil. Become a thing.

  If the actuator is not provided, the residue treatment device cannot be raised unless the actuator is operated. If the actuator raises the delay operation, the residue treatment device may be pushed into the soil. It becomes.

  Accordingly, it has become possible to provide a corn harvesting machine in which the residue treatment device provided in the lower part of the vehicle body is less likely to plung into the soil.

  In the present invention, it is preferable that the lifting force applying means is a spring provided across the traveling vehicle body and the residue processing device.

  According to this configuration, the residue processing device can be lifted and urged upward by a simple configuration in which a spring is provided across the traveling vehicle body and the residue processing device.

  In the present invention, it is preferable that a linkage member for interlocking and linking the actuator and the residue processing device is provided, and the spring is provided for the linkage member.

  According to this structure, when raising / lowering the residue processing apparatus by operation of an actuator, the residue processing apparatus is lifted / lowered via a linkage member. The linkage member is provided with a spring, and when the vehicle body is driven in a state where the operation of the actuator is stopped, the residue processing device is supported so that the upward biasing force by the spring acts. .

  Accordingly, the spring is provided with a simple structure without causing a complicated structure such as providing a support bracket for spring tension by effectively using a member for interlocking and linking the actuator and the residue processing device. be able to.

  In the present invention, the linkage member is configured by a chain, the spring is configured by a coil-type tension spring, and is provided in a state of being externally mounted on the chain. Is adjusted to the working position, the spring is stretched on the chain so that a tensile force acts in the direction of lifting the residue processing device in a state where the residue processing device is lifted and supported by the chain. It is preferable that

  According to this configuration, the actuator and the residue processing device are interlocked and linked via the chain, and the coil-type tension spring is externally attached to the chain, and the spring is stretched on the chain.

  Then, when the lifting / lowering position of the residue processing device is adjusted to the working position by operating the actuator, a tensile force by the spring acts in the direction of lifting the residue processing device in a state where the residue processing device is lifted and supported by the chain. Will do. That is, during the harvesting operation in which the raising / lowering position of the residue processing device is located at the work position, the residue processing device is lifted and biased to the upward side by the biasing force of the tension spring.

  In the present invention, it is preferable that one end side of the tension spring is connected to the residue treatment device.

  For example, when a tension spring is interposed in the middle of the chain and the chain is interposed between the tension spring and the residue treatment device, both ends of the tension spring increase with the lifting operation of the residue treatment device. Since it is connected to a swinging chain, the connection state may become unstable.

  Therefore, in this configuration, since one end side of the tension spring is connected to the residue processing apparatus, the tension spring is stably connected.

  In the present invention, a height detection sensor that detects that the lifting / lowering position of the residue processing device has been adjusted to the working position by the lifting / lowering operation of the actuator, and the height detection sensor lifts and lowers the residue processing device. When it is detected that the position has been adjusted to the working position, control means is provided for controlling the operation of the actuator so as to stop the raising / lowering operation of the actuator and maintain the raising / lowering position. Is preferred.

  According to this configuration, when the residue processing device is moved up and down by operating the actuator, the height detection sensor has adjusted the residue processing device to a work position suitable for the residue processing work. When detected, the control means controls the operation of the actuator so as to stop the raising / lowering operation of the actuator and maintain the raising / lowering position.

  Therefore, the raising / lowering position of the residue processing device is appropriately adjusted to the working position, and the state where the residue processing device is lifted and biased by the biasing force of the tension spring is maintained. In addition, simply performing a simple operation to command the operation of the actuator will automatically adjust the residue processing device to the working position and maintain that position, so that the operation is less cumbersome. become.

  In the present invention, it is preferable that the actuator is constituted by a fluid pressure cylinder.

  According to this configuration, even if the residue processing device has a large weight, the residue processing device can be efficiently moved up and down by using a fluid pressure cylinder that can be driven at high speed with a large operating force. be able to.

  In the present invention, the actuator is constituted by a fluid pressure cylinder, and the ascending force applying means is connected to a fluid supply path to the fluid pressure cylinder and the residue treatment device is connected to the pressure accumulated therein. It is preferable that it is constituted by an accumulator that lifts and urges it to the ascending side.

  According to this configuration, the actuator including the fluid pressure cylinder moves the residue processing device up and down by supplying fluid from the fluid supply source via the supply / discharge valve. That is, when raising / lowering the residue processing apparatus, the fluid is supplied from the fluid supply source to the fluid pressure cylinder, or the fluid is discharged from the fluid pressure cylinder.

  An accumulator is connected to a supply path through which fluid from a fluid supply source is supplied to the fluid pressure cylinder. The accumulator accumulates pressure when fluid is supplied from the fluid supply source to the fluid pressure cylinder.

  When the raising / lowering position of the residue processing device is held at the working position, the supply / discharge of fluid to / from the fluid pressure cylinder as described above is stopped. However, at this time, since the accumulator is connected to the fluid pressure cylinder through the supply path, the residue processing device is lifted and biased to the upward side by the pressure accumulated in the accumulator.

  In this way, the residue processing apparatus can be lifted and biased to the ascending side using the accumulator connected to the supply path.

  In the present invention, a height detection sensor for detecting that the raising / lowering position of the residue processing device is adjusted to the working position by the raising / lowering operation of the actuator, and the residue processing device is higher than the working position. When the height detection sensor detects that the residue processing device has been lowered to the working position when the lowering operation is performed from the position, the lowering operation is stopped, and the accumulated pressure of the accumulator is increased. Preferably, control means is provided for controlling the operation of the actuator so as to stop the supply after supplying the fluid through the supply path until a predetermined pressure is reached and to maintain the state.

  According to this configuration, when the actuator is operated to lower the residue processing device from a position higher than the work position, the height detection sensor allows the residue processing device to perform work suitable for processing work. When it is detected that the position has been adjusted, the control means stops the lowering operation of the actuator, stops supplying the fluid after supplying the fluid through the supply path until the accumulated pressure of the accumulator reaches a predetermined pressure. Therefore, the operation of the actuator is controlled so as to maintain the state.

  Therefore, the raising / lowering position of the residue processing device is appropriately adjusted to the working position, and the state in which the residue processing device is lifted and biased by the pressure accumulated in the actuator is maintained. In addition, the residue disposal device is automatically adjusted to the working position by simply performing a simple operation to command the lowering of the actuator, and the position is maintained. Will be adjusted.

  In the present invention, the residue processing device is configured to include a grounding roller that is grounded to the ground at the working position, and the height detection sensor is based on whether the grounding roller is grounded or not. It is preferable that the residue processing device detects whether or not the residue processing device has been lowered to the working position.

  According to this configuration, when the residue processing device is in the working position, the ground roller comes into contact with the ground. Whether or not the residue processing device has been lowered to the working position is detected based on whether or not the ground roller is in contact with the ground.

  Therefore, the height of the residue processing device can be detected with a simple configuration by using the ground roller provided in the residue processing device.

  In the present invention, it is preferable that the residue processing device is a hammer knife type shredding device driven and rotated around a horizontal axis.

  According to this configuration, the hammer knife type shredding device is driven and rotated around the horizontal axis, whereby the residue remaining in the field can be satisfactorily shredded with little processing residue.

It is a right view of a corn harvester. It is a top view of a corn harvester. It is a left view of a corn harvester. It is a top view of a body frame. It is a side view which shows the raising / lowering operation structure of a residue processing apparatus. It is a block diagram which shows the control structure with respect to a residue process cylinder. It is a block diagram which shows the control structure with respect to the residue process cylinder of another embodiment. It is a block diagram which shows the control structure with respect to the residue process cylinder of another embodiment. It is a side view which shows the raising / lowering operation structure of the residue processing apparatus of another embodiment. It is a side view which shows the raising / lowering operation structure of the residue processing apparatus of another embodiment. It is a block diagram which shows the control structure with respect to the residue process cylinder of another embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the corn harvester according to the present invention is located at the front of the traveling vehicle body 3 including a pair of left and right front wheels 1 and a pair of left and right rear wheels 2. The harvesting processing device 4, the feeder 5 as a conveying device extending in the front-rear direction in a state of being obliquely raised rearward from the rear portion of the harvesting processing device 4 to the upper side of the traveling vehicle body 3, and the collection tank as the collection unit located at the rear portion of the traveling vehicle body 3 6, and a residue processing device 7 located in the front and rear intermediate portion between the front wheel 1 and the rear wheel 2 below the traveling vehicle body 3.

  Corn as a plant body forms a tuft-like portion containing a large number of seeds (fruits) at the harvesting time with respect to the stems to be planted. Numerous seeds are contained inside the tufted leaves, and the seeds are formed in a form aligned with the outer surface of the rod-shaped core. The corn harvester according to the present invention harvests and collects a tuft having a large number of seeds inside a foliage as a harvesting target.

  That is, in the corn harvesting machine, during the harvesting operation, the traveling vehicle body 3 is driven by driving the front wheels 1, and the harvested object harvested by the harvesting processing device 4 is conveyed toward the collection tank 6 by the feeder 5. It is stored in. Then, the stems left in the field at the time of harvest are shredded by the residue processing device 7.

  The traveling vehicle body 3 is provided with a driving unit 9 in a state where the upper part is covered with a cabin 8 at the front of the vehicle body, and a driving unit 10 is provided at the rear of the driving unit 9 so that a pair of left and right front wheels 1 fixed in a left-right direction is provided. It is configured to be able to travel by being driven by an engine 11 provided in the driving unit 10.

  The pair of left and right rear wheels 2 are provided so as to be capable of changing the direction to the left and right by a hydraulically operated steering cylinder C1 (see FIG. 4), and are operated with a steering handle 28 as a steering operation tool provided in the driving unit 9. The directional cylinder C1 is linked through an operation linkage mechanism (not shown), and the steering wheel 28 is rotated so that the left and right rear wheels 2 are steered.

  As shown in FIG. 2, a boarding / alighting deck 12 and a boarding / alighting staircase 13 are provided on the lateral side of the left side entrance of the cabin 8. The getting-on / off stairs 13 can be switched between a use position located on the laterally outer side of the front wheel 1 and a storage position located on the rear side of the front wheel 1 by swinging around the swing axis.

  Auxiliary worker boarding deck 14 is provided on the lateral side of the left side of the vehicle body relative to feeder 5, and auxiliary work such as monitoring the corn carry-out status of feeder 5 by the auxiliary worker boarding on this auxiliary worker boarding deck 14. Can be done. The auxiliary worker boarding deck 14 is arranged such that the front end is located near the rear end of the boarding deck 12.

  The auxiliary worker boarding deck 14 is located above the fuel tank 15 for storing the fuel supplied to the engine 11, and has a cover function that covers the fuel tank 15. The prime mover 10 includes an engine 11, an engine cooling radiator 16, an intake case 17, an air cleaner 18 and a pre-cleaner 19 for intake of combustion air.

  As shown in FIGS. 1, 3, and 4, the vehicle body frame F that supports the traveling vehicle body 3 is located on both the left and right sides of the traveling vehicle body 3 and is a pair of left and right as main supports extending in the front-rear direction of the traveling vehicle body 3. A plurality of laterally extending along the lateral direction connecting the pair of left and right front and rear facing frame bodies 20 at each of the front and rear frame body 20 and the vehicle body front side portion, the vehicle body rear side portion, and the front and rear intermediate portion side portion. A connecting member 21, and an operating unit frame 23 that supports the operating unit 9 and the cabin 8 surrounding the operating unit 9 from below are provided. The operation part frame 23 is provided in a state of being erected on the upper side from the pair of left and right front and rear frames 20.

  The harvesting processing device 4 is supported by the operating unit frame 23 of the vehicle body frame F so as to be swingable around the horizontal axis P1 and lifted for a pair of left and right hydraulically operated harvesting processing devices supported by the lower portion of the vehicle body frame F. A cylinder C2 (hereinafter abbreviated as a harvesting processing cylinder) is configured to be driven up and down.

The residue processing device 7 will be described.
The residue processing device 7 is a hammer knife type shredding device, and shreds stem stems left in the field during harvesting. As shown in FIG. 1, the residue processing device 7 is disposed between the front wheel 1 and the rear wheel 2 of the traveling machine body and below the traveling vehicle body 3, and a pair of left and right swing supports on the vehicle body frame F. A cover body 31 supported via 30, a rotation chopper 32 provided inside the cover body 31, and a grounding roller 33 positioned behind the rotation chopper 32 are provided.

  The cover body 31 functions as a frame body that supports the entire residue processing apparatus 7. And the rotation chopper 32 is comprised by the hammer knife type rotated around a horizontal axis, and can shred the corn stalk remaining in the field with the traveling of the vehicle body.

  As shown in FIG. 5, the pair of left and right swing support bodies 30 are configured to include a pair of upper and lower swing support arms 30 a and 30 b and are fixed to the pair of left and right front and rear frame bodies 20. A pair of left and right brackets 34 are supported so as to be swingable up and down around the horizontal axis P <b> 2, and their extended ends are connected to the cover body 31.

  As shown in FIG. 5, the residue processing device 7 is moved up and down by a lifting cylinder C3 (hereinafter abbreviated as a residue processing cylinder) (corresponding to a fluid pressure cylinder) for a hydraulically operated residue processing device as an actuator. It is provided freely. The residue processing cylinder C3 is attached to the horizontal connecting member 21A located in the intermediate portion of the vehicle body frame F in the vehicle longitudinal direction in a vertical orientation.

  When the description is added, the cross-section of the horizontal connecting member 21A is formed in a rectangular tube shape, and is supported over a pair of left and right front-rear frame bodies 20. The cylinder body 35 of the residue processing cylinder C3 is fixedly supported on the upper surface of the lateral connecting member 21A at the intermediate position in the vehicle body lateral width direction.

  As shown in FIG. 5, a guide roller 37 is provided at the upper end of the cylinder rod 36 in the residue processing cylinder C3 so as to be rotatable around a lateral axis. A suspension chain 39 as an example of a linking member having one end connected to the support portion 38 fixed to the lateral connection member 21A and the other end connected to the cover body 31 of the residue disposal device 7 is guided. It is stretched while being wound around the roller 37.

  Therefore, by operating the residue processing cylinder C3 to extend and contract, the residue processing device 7 suspended and supported by the chain 39 is supported so as to be swingable up and down around the horizontal axis P2. Then, the residue processing device 7 performs an elevating operation over a working position where the grounding roller 33 is grounded and the rotating chopper 32 approaches the ground, and a non-working elevated position where the grounding roller 33 and the rotating chopper 32 are elevated above the ground. It is configured to be possible.

  That is, when in the work position, the grounding roller 33 is grounded and the ground height of the rotating chopper 32 is adjusted to the target work height. However, the target work height can be switched in three stages as will be described later.

  The motive power from the engine 11 is transmitted to the harvesting processing device 4 and the residue processing device 7 through a work clutch (not shown) so as to be switched between a driving state in which the harvesting operation is performed and a non-driving state in which the transmission is cut off. Yes.

  A coil-type tension spring 40 is provided between the traveling vehicle body 3 and the residue processing device 7 as a lifting force applying means J that lifts and biases the residue processing device 7 upward. As shown in FIG. 5, the tension spring 40 is connected in a state in which one end on the upper side is locked to the middle part of the chain 39, and the other end on the lower side is connected to the chain 39 in the cover body 31. It is connected in a state of being locked to.

  When the lifting / lowering position of the residue processing device 7 is adjusted to the working position, the tension spring 40 is applied with a tensile force in the direction in which the residue processing device 7 is lifted while the residue processing device 7 is lifted and supported by the chain 39. Thus, the chain 39 is stretched.

  When the explanation is added, the both ends of the tension spring 40 are locked and stretched while the chain 39 is loosened, and the residue processing cylinder C3 is operated to pull the chain 39 from the upper side. When the chain 39 is in a tension state in a state where the residue processing device 7 is lifted and supported, the tension spring 40 is extended and a tensile force acts in the direction of lifting the residue processing device 7.

  As shown in FIG. 6, an electromagnetically operated hydraulic pressure that supplies hydraulic fluid (fluid) to the residual processing cylinder C3 from the hydraulic pump PO driven by the engine 11 and discharges hydraulic fluid from the residual processing cylinder C3. A control valve 41, a control device 42 as a control means for controlling the operation of the hydraulic control valve 41, a lift command switch 43 for commanding raising and lowering of the residue processing device 7 based on manual operation, and a grounding roller 33 Is provided with a grounding detection switch 44 as a height detecting means for detecting that it is grounded, and an automatic mode on / off switch 45.

  When the control device 42 is instructed to rise based on the operation of the up / down command switch 43, the control device 42 supplies hydraulic oil to the residue processing cylinder C3 so as to raise the residue processing device 7 while the increase is instructed. To do. Further, when the lowering is commanded based on the operation of the elevation command switch 43, the hydraulic oil is discharged from the residue processing cylinder C3 so as to lower the residue processing device 7 while the lowering is commanded. In both the ascending operation and the descending operation, when the command based on the operation of the elevation command switch 43 is stopped, the operation is stopped at that time.

  Then, when the automatic mode is set by the automatic mode on / off switch 45, the control device 42 detects the ground detection switch when the residue processing device 7 is lowered based on the operation of the elevation command switch 43. When the grounding of the grounding roller 33 is detected by 44, the hydraulic control valve 41 is switched and controlled to automatically stop the descent operation of the residue processing device 7 and maintain the height thereof. .

  As shown in FIG. 5, the ground roller 33 is supported on the side surface of the cover body 31 so as to be swingable up and down via swing support portions 46 provided on both sides in the lateral direction of the machine body. The swing support portion 46 supports the height adjustment member 47 and the ground roller 33 that can switch the relative swing posture with respect to the cover body 31 in three stages, and is lateral to the height adjustment member 47 within a predetermined small range. And a roller support member 48 that is swingably supported around the axis.

  The height adjusting member 47 is supported by the cover body 31 so as to be swingable around the horizontal axis P4 so that the height of the grounding roller 33 relative to the cover body 31 can be changed. The posture can be switched in three stages.

  That is, the height adjustment member 47 is supported by the cover body 31 so as to be swingable around the horizontal axis P4 by the support shaft 49 at the lower position on the rear side of the machine body, and in the swing direction at the upper position on the front side of the machine body. Bolt insertion holes 50 are formed at three locations with different positions along the same.

  By inserting one of the three bolt insertion holes 50 and the cover insertion hole 51 on the fixed side provided in the cover body 31 and fastening them with screws, the height adjustment member 47 can be relative to the cover body 31. The swing posture can be switched in three stages. Since the relative swinging posture of the height adjusting member 47 corresponds to the relative height of the ground roller 33 with respect to the cover body 31, the target work height of the residue processing device 7 can be switched in three stages.

  The roller support member 48 is supported by the cover body 31 so as to be relatively swingable by a support shaft 49 around the same axis P4 as the swing axis of the height adjusting member 47. Further, an insertion hole 53 is formed in the height adjusting member 47 so as to insert a locking pin 52 projecting laterally. The insertion hole 53 is a long hole extending in the circumferential direction around the axis P4 of the support shaft 49. Is formed. Therefore, the roller support member 48 is provided so as to be swingable with respect to the height adjusting member 47 within a predetermined small range by the insertion hole 53.

  As shown in FIG. 5, when the roller support member 48 swings relatively upward in a predetermined small range by the insertion hole 53 with respect to the height adjustment member 47, the ground contact detection supported by the height adjustment member 47 is detected. The detection piece 44a of the switch 44 is separated from the upper end of the roller support member 48, and the ground detection switch 44 is configured to switch to the detection state.

  With this configuration, when the residue processing device 7 is being lowered, the ground roller 33 is grounded and the roller support member 48 swings relatively upward with respect to the height adjustment member 47. This can be detected by the ground detection switch 44.

  If the automatic mode is not set by the automatic mode on / off switch 45, the automatic stop operation described above is not executed. For example, if the amount of shredded stalk scraps is large and it is desired to press with a strong force by the ground roller 33, the automatic processing mode is turned off, and the residue processing device 7 after the ground roller 33 is grounded. It is possible to hold down the shredded stalk scraps by lowering a little.

  Further, the residue processing device 7 is provided with a scraper 54 in a state of being laid over the upper sides of the roller support members 48 on both the left and right sides. By providing this scraper 54, it is possible to scrape mud and the like adhering to the outer peripheral surface of the grounding roller 33 during work, and to prevent the mud from accumulating, and to connect the roller support members 48 on both the left and right sides. By doing so, it is possible to reinforce the support strength.

[Another embodiment]
(1) In the above embodiment, the tension spring 40 as the lifting force applying means J is provided on the chain 39 in a state where the tension spring 40 is externally attached to the chain 39 and one end side is connected to the residue treatment device 7. Instead of the configuration, the tension spring 40 may be provided in a state of being interposed in the middle of the long means direction of the chain 39, or may be provided across the support portion 38 and the chain 39. Moreover, you may equip with the cylinder rod 36 of the residue process cylinder C3 in the exterior state.

(2) In the above embodiment, the ascending force applying means J is constituted by the tension spring 40, and when the ground roller 33 is grounded, the raising and lowering of the residue processing device 7 is stopped and the state is maintained. It may replace with a structure and may be comprised as follows.

  As shown in FIG. 7, an accumulator 56 is connected to the hydraulic oil supply passage 55 for the residue processing cylinder C3. The accumulator 56 lifts and urges the residue processing device 7 upward with the pressure accumulated therein. is there. In this configuration, the accumulator 56 functions as the lifting force applying means J.

  Then, when the control device 42 is operating the residue processing device 7 to be lowered from a position higher than the work position, the ground detection switch 44 detects that the residue treatment device 7 has been lowered to the work position. Then, the descent operation is stopped, and after the hydraulic oil is supplied through the supply passage 55 until the accumulated pressure of the accumulator 56 reaches a predetermined pressure, the supply is stopped and the residue processing cylinder is maintained so as to maintain the state. It is configured to control the operation of C3.

  In other words, the control device 42 operates in accordance with the operation of the up / down command switch 43 in the same manner as in the above-described embodiment. However, the control device 42 operates the descent of the residue processing device 7 based on the operation of the up / down command switch 43. The operation when the ground detection switch 44 detects the grounding of the grounding roller 33 is different from that of the above embodiment.

  That is, when the ground detection switch 44 detects that the ground roller 33 is grounded while the residue processing device 7 is being lowered while discharging the hydraulic oil from the residue processing cylinder C3, the residue processing device 7 After stopping the descent operation (discharge of hydraulic oil), the hydraulic oil is supplied through the supply path 55 until the accumulated pressure of the accumulator 56 reaches a predetermined pressure, and then the supply is stopped and the state is maintained.

  Specifically, after stopping the lowering operation, the hydraulic oil is supplied until a set time for which the accumulated pressure of the accumulator 56 is predicted to become a predetermined pressure elapses. As a result, the accumulated pressure of the accumulator 56 becomes a predetermined pressure, but no operating oil is supplied to the residue processing cylinder C3, and the height of the residue processing device 7 is the same as when the grounding roller 33 is grounded. .

(3) In the embodiment described in the above (2), the accumulator 56 is connected to the supply path 55, but instead of this configuration, as shown in FIG. In the meantime, the check valve 57 and the throttle valve 58 may be interposed in parallel.

  With this configuration, for example, when the residue processing device 7 comes into contact with the convex portion of the ground, the hydraulic oil is supplied from the accumulator 56 to the residue processing cylinder C3 via the check valve 57 and quickly. It can be raised and it can avoid that the residue processing apparatus 7 plunges into the soil. On the other hand, when the residue processing device 7 once raised is lowered to the working position, the working oil returns to the accumulator 56 through the throttle valve 58, so that the residue processing device 7 can be lowered at a low speed. It is possible to avoid the dredging device 7 descending rapidly and thrusting into the soil.

(4) In the embodiment described in the above (2) or (3), when the control device 42 detects the grounding of the grounding roller 33 by the grounding detection switch 44, the lowering operation (hydraulic oil) of the residue processing device 7 is performed. After the discharge) is stopped, the hydraulic oil is controlled to be supplied until the set time for which the accumulated pressure of the accumulator 56 is predicted to reach a predetermined pressure has passed. The lowering operation of the residue processing device 7 and the operation of supplying hydraulic oil until the accumulated pressure of the accumulator 56 reaches a predetermined pressure may be manually commanded.

(5) In the above embodiment, if the automatic mode is not set by the automatic mode on / off switch 45, the control device 42 does not execute the automatic stop operation based on the detection of the ground detection switch 44. As a configuration not including the automatic mode on / off switch 45, an automatic stop operation based on the detection of the ground detection switch 44 may be always performed.

(6) In the above-described embodiment, the hydraulically operated residue processing cylinder C3 as an actuator is provided in a vertical orientation, and the residue processing cylinder C3 and the residue processing device 7 are linked together via the chain 39. However, instead of such a configuration, a configuration in which the residue processing cylinder C3 is provided in a lateral orientation may be used, or a configuration in which the chain 39 is linked and linked via a wire may be used. In addition, other fluid pressure cylinders such as an air cylinder may be used instead of the hydraulically operated residue processing cylinder C3, and an electric motor type drive mechanism may be used instead of the fluid pressure cylinder.

(7) In the above embodiment, whether or not the residue processing device 7 is lowered to the working position is detected based on whether or not the ground roller 33 is in contact with the ground. It is good also as a structure which provides the ultrasonic sensor 59 as a ground height sensor which detects the ground height to the ground without providing 33, and detects the ground height of the residue processing apparatus 7 directly.

  As shown in FIG. 9, the ultrasonic sensor 59 is positioned on the front side of the vehicle body of the residue processing device 7 and on the lower side of the feeder 5, and is paired up and down with respect to the support member 60 fixed to the vehicle body frame F. While being pivotally connected via a parallel link 61, it is pivotally connected via a link 62 to a middle portion of the swinging support 30 that supports the residue processing device 7. By configuring in this way, the ultrasonic wave is supported so as to have a height corresponding to the ground height of the residue processing device 7 while maintaining the state in which the ultrasonic wave emission direction is always directed downward. In this embodiment, since the ground roller 33 is not provided, it is preferable to control the operation of the residue processing cylinder C3 so that the ground height detected by the ultrasonic sensor 59 becomes a predetermined height.

(8) In the above embodiment, the grounding roller 33 is provided only on the rear side of the vehicle body of the residue processing device 7. However, as shown in FIG. It is good also as a structure provided with the grounding roller 63. FIG. If comprised in this way, if there exists a convex part in a farm field, since the front side ground roller 63 will ride and raise the residue processing apparatus 7, it will become easy to avoid thrusting into the ground.

  Although not shown, the front-side grounding roller 63 is composed of a plurality of parts that are divided so as to act only on the streak but not on the place where the planting stems exist. In this way, the residue after harvesting is not pressed, and the shredding treatment by the residue treatment device 7 can be performed satisfactorily.

(9) In the above embodiment, the operation for raising the residue processing device 7 is executed only by a command from the elevation command switch 43. However, when the traveling vehicle body 3 gets over the convex portion of the ground, it is automatically performed. A configuration for raising the residue processing device 7 may be provided.

  That is, as shown in FIG. 11, the weight 65 is provided in a state in which it can swing up and down around the horizontal axis P5 and is urged back to the neutral position by the neutral urging mechanism 64. A linkage mechanism 66 is provided that moves the hydraulic control valve 41 in conjunction with the lifted position side in accordance with the movement of the weight 65 due to inertia when the vehicle is moved over.

  In other words, when the height and front wheel ride on the convex portion of the field, the weight 65 temporarily lowers due to the impact, but the movement causes the spool of the hydraulic control valve 41 to move up. Move to the side. The neutral urging mechanism 64 is provided in a state in which it is urged to return to the neutral position by upper and lower locking tools that engage with the weight 65 and a lock pin (not shown).

  Further, the weight 65 is allowed to swing up and down in conjunction with the operation clutch on / off operation tool 67 so that it can swing up and down only when harvesting work is performed, and swinging is restricted when not working. A restricting tool 68 is provided. Although the orientation is different in FIG. 11 which is the principle diagram, the restricting tool 68 is configured to restrict the movement of the weight 65 in the vertical direction.

  The present invention can be applied to a corn harvester for harvesting corn.

3 Traveling body 7 Residue processing device 33 Ground roller 39 Chain (linkage member)
40 Spring 42 Control means 44 Ground height sensor 55 Supply path 56 Accumulator C3 Actuator J Lifting force application means

Claims (11)

  A residue processing device provided so as to be movable up and down with respect to the traveling vehicle body, an actuator capable of driving the residue processing device up and down, and a lifting force applying means that lifts and biases the residue processing device upward. Corn harvesting machine.   The corn harvester according to claim 1, wherein the lifting force applying means is a spring provided across the traveling vehicle body and the residue processing device.   The corn harvester according to claim 2, further comprising: a linkage member that links the actuator and the residue processing device to each other, and the spring is provided on the linkage member. The linkage member is constituted by a chain,
The spring is composed of a coil-type tension spring and is provided in a state of being sheathed on the chain,
When the raising / lowering position of the residue disposal device is adjusted to the working position, the tensile force acts in the direction of lifting the residue disposal device in a state where the residue disposal device is lifted and supported by the chain. The corn harvester according to claim 3, wherein a spring is stretched around the chain.   The corn harvester according to claim 4, wherein one end side of the tension spring is connected to the residue processing device. A height detection sensor for detecting that the raising / lowering position of the residue processing device has been adjusted to the working position by the raising / lowering operation of the actuator;
When it is detected by the height detection sensor that the raising / lowering position of the residue processing device has been adjusted to the working position, the raising / lowering operation of the actuator is stopped and the raising / lowering position of the actuator is maintained. The corn harvester according to any one of claims 1 to 5, further comprising control means for controlling operation.   The corn harvester according to any one of claims 1 to 6, wherein the actuator is configured by a fluid pressure cylinder. The actuator comprises a fluid pressure cylinder;
The ascending force applying means is constituted by an accumulator that is connected to a fluid supply path to the fluid pressure cylinder and lifts and urges the residue treatment device to the ascending side with a pressure accumulated therein. The corn harvester according to 1. A height detection sensor for detecting that the raising / lowering position of the residue processing device has been adjusted to the working position by the raising / lowering operation of the actuator;
When the residue processing device is being lowered from a position higher than the work position, the residue detection device is lowered when the height detection sensor detects that the residue treatment device is lowered to the work position. Control means for controlling the operation of the actuator to stop the operation and to stop the supply and maintain the state after supplying the fluid through the supply path until the accumulated pressure of the accumulator reaches a predetermined pressure; The corn harvester according to claim 8, comprising: The residue processing device is configured to include a ground roller that contacts the ground at the work position,
The corn harvester according to claim 9, wherein the height detection sensor detects whether or not the residue processing device has been lowered to the working position based on whether or not the ground roller is in contact with the ground. Machine.   The corn harvesting machine according to any one of claims 1 to 10, wherein the residue processing device is a hammer knife type shredding device driven and rotated around a horizontal axis.

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