JP6840000B2 - combine - Google Patents

Description

The present invention relates to a combine.

A combine provided with a grain culm guide that guides the grain culm to the feed chain during hand-handling work has been conventionally known (see Patent Document 1). The grain culm guide described in Patent Document 1 is configured to be rotatable around a rotation fulcrum provided on the threshing portion side. When pushed down by the operator, the culm guide rotates toward the feed chain and moves to a position where hand-handling work is possible.

Japanese Unexamined Patent Publication No. 2014-97016

According to the grain culm guide that rotates around the rotation fulcrum provided on the threshing section side, a force that pushes the grain culm from the threshing section side to the cutting section side is likely to act during the hand-handling work. As the transport resistance increases, the gap between the culm guide and the feed chain is limited at the portion where the culm is taken in toward the threshing section. Therefore, it becomes difficult to adjust the force for pressing the culm by the culm guide, which leads to the disorder of the transport posture. In addition, the increase in transport resistance causes the culm to bite between the grain guide and the feed chain, and the wraparound of the succession transport chain causes lumps between the succession transport chain and the feed chain, resulting in threshing. The transport posture of the culm is not stable, for example, the culm stays and falls before being taken into the culm. Therefore, it is desired to stabilize the transport posture of the grain culm during the hand-handling work.

An object of the present invention is to provide a combine capable of stabilizing the transport posture of a grain culm during a hand-handling operation.

The problem to be solved by the present invention is as described above, and next, the means for solving this problem will be described.

The invention according to claim 1 includes a cutting section for cutting grain culms, a grain removal section for removing grains, a feed chain for transporting grain culms from the cutting section to the grain removal section, and an inside of the feed chain in the width direction of the machine body. A combine including a succession transfer device arranged in a culm, a culm guide that can hold a culm and guide it to the feed chain, and a first switch and a second switch that allow the feed chain to be driven. The culm guide is rotatable around a rotation fulcrum provided on the cutting portion side, and the culm guide is provided with an operating tool for operating the rotation of the culm guide. Can switch the first switch on by being operated so as to be close to the feed chain, and allows the feed chain to be driven when the first switch and the second switch are on. The grain guide has a pressing member that pushes the grain toward the succession transfer device when the operating tool is operated to turn on the first switch while approaching the feed chain. It is what you are doing.

In the invention according to claim 2, the second switch is arranged on the cutting portion side.

In the invention according to claim 3, the culm guide shifts to a state of approaching the feed chain by rotating clockwise in a side view, and the culm guide approaches the feed chain in a state of approaching the feed chain. The first switch is turned on by rotating the operating tool clockwise in a side view.

According to the invention of claim 4, the grain guide is a pressing member that pushes the grain toward the feed chain in a state of approaching the feed chain separately from the pressing member that pushes the grain toward the succession transport device. The pressing member having the above and pressing the grain toward the feed chain is located on the upper side of the facing portion facing the feed chain along the transport direction when it comes into contact with the grain. It includes a gap forming portion curved from the facing portion toward the rotation fulcrum, and a tip portion curved from the facing portion in a direction away from the feed chain on the lower side of the facing portion.

As the effect of the present invention, the following effects are exhibited.

According to the invention of claim 1, since the rotation fulcrum of the grain culm guide is provided on the cutting section side, when the grain culm guide pushes the grain culm against the feed chain by operating the operating tool, the grain is removed from the cutting section side. A force acting to feed the culm toward the portion side, that is, along the transport direction of the feed chain, can be easily applied to the culm. Therefore, the amount of force applied to the threshing portion side can be easily and directly adjusted according to the amount of operation of the operating tool by the operator, and the transport posture of the culm can be maintained in a more stable state. Therefore, it is possible to provide a combine that can stabilize the transport posture of the grain culm during the hand-handling work. In addition, since both the tip side and the stock root side of the grain culm can be pressed at the same time by a plurality of pressing members, it is possible to prevent the grain culm from bending and maintain the transport posture of the grain culm in a more stable state. ..

According to the second aspect of the present invention, both hands of the worker are separated from the feed chain to the cutting section side, and then one hand of the worker is used to operate the operating tool for pressing the culm against the feed chain. By using the other hand to operate the second switch, it is possible to efficiently carry out the hand-handling work using both hands of the operator and to stabilize the transport posture of the culm.

According to the invention of claim 3, the first switch is rotated clockwise by the operation tool so that the direction of rotation of the culm guide is clockwise from the cutting section side to the grain removal section side. Can be switched on, so the operator can easily and continuously operate the culm guide from the rotation of the culm guide to the switching of the first switch to on, and the culm transport posture. Can be stabilized. In this way, the culm guide is improved in operability. Therefore, the grain culm guide with improved operability can efficiently carry out the hand-handling work and stabilize the transport posture of the grain culm.

According to the invention of claim 4, since the gap forming portion of the pressing member is curved from the facing portion toward the rotation fulcrum, a gap can be formed between the upper side of the pressing member and the feed chain, so that cutting can be performed. It is possible to stabilize the transport posture of the grain culm while reducing the transport resistance to the grain culm waiting on the part side. Further, since the tip of the pressing member is curved from the facing portion in the direction away from the feed chain, a gap can be formed between the lower side of the pressing member and the feed chain, so that the culm guide can convey the culm. The feed chain can transport the culm without hindering it while keeping the transport posture of the culm stable, and the culm can be stably taken into the handling chamber.

It is a side view of a combine. It is an enlarged side view of the combine. It is an enlarged side view of the combine which shows the culm guide which rotates upward with respect to a feed chain and moves away from a feed chain. It is an enlarged side view of the combine which shows the grain culm guide which turned downward and approached a feed chain, the first switch, and the second switch on the cutting part side. It is an enlarged side view of the combine which shows the operation tool which is operated to turn on a 1st switch in a state where a grain culm guide rotates downward and approaches a feed chain. It is an enlarged plan view of the combine which shows the culm guide which turned downward and approached a feed chain. It is a partially enlarged view of FIG. 6 which shows the culm pressed between the culm guide and the feed chain. (A) an enlarged front view of the grain culm guide seen from the left side surface of the combine, (B) an enlarged plan view of the grain culm guide, and (C) an enlarged left side view of the grain culm guide. (D) is an enlarged right side view of the grain culm guide, and (E) is an enlarged rear view of the grain culm guide. It is a skeleton diagram which shows the power transmission mechanism of a combine. It is a figure which shows the control system of a combine. It is a figure which shows the main shift lever, the auxiliary shift lever, and the work clutch lever as various operation tools. It is a figure which shows the relationship between the operation position of various operation tools, and the drive of a feed chain by the operation of an auxiliary operation switch. (A) As a diagram showing the procedure of the hand-handling work, it is a figure showing a state in which the grain culm guide is rotated upward, and (B) the grain culm guide is rotated upward and the grain culm is placed in the feed chain. It is a figure which shows the mounted state, (C) the state which the grain culm guide rotates downward and presses the grain culm against a feed chain, and (D) is a figure which shows the feed chain and the grain culm guide. It is a figure which shows the state which the culm pressed with is carried. It is an enlarged side view of the combine which shows the grain culm guide which rotated downward with respect to a feed chain and approached a feed chain, the first switch, and the second switch on the threshing part side. It is an enlarged side view of the combine which shows the grain culm guide which rotated downward with respect to a feed chain and approached a feed chain, the first switch, and two second switches, a cutting part side and a threshing part side. .. (A) is an enlarged side view showing the tip end portion of the pinching rail provided above the feed chain, and (B) is an enlarged side view showing a state in which the tip end portion of the pinching rail is moved upward.

The overall configuration of the combine 1 will be described with reference to FIG. 1 as an embodiment of the present invention. FIG. 1 is a side view of the combine 1. Note that FIG. 1 shows the front-rear direction and the vertical direction of the combine 1. The front and back directions of the paper surface of FIG. 1 are the left and right directions of the combine 1.

The combine 1 includes a traveling unit 2, a cutting unit 3, a threshing unit 4, a sorting unit 5, a storage unit 6, a straw disposal unit 7, a power unit 8, and a control unit 9. While traveling by the traveling unit 2, the combine 1 threshes the grain culms cut by the cutting unit 3 in the threshing unit 4, selects the grains in the sorting unit 5, and stores them in the storage unit 6. Further, the straw discharged after threshing is processed by the straw waste processing unit 7. The power unit 8 supplies power to the traveling unit 2, the cutting unit 3, the threshing unit 4, the sorting unit 5, the storage unit 6, and the straw waste processing unit 7. Then, the combine 1 is operated by the control unit 9.

The traveling portion 2 is provided below the machine frame 20. The traveling unit 2 includes a transmission 21 (see FIG. 9) and a pair of left and right traveling devices (hereinafter referred to as “crawler type traveling devices”) 22 and 22. The transmission 21 transmits the power of the engine 8a of the power unit 8 (hereinafter referred to as “rotational power”) to the crawler type traveling devices 22 and 22. The crawler type traveling devices 22 and 22 travel the combine 1 in the front-rear direction. Further, the crawler type traveling devices 22 and 22 rotate the combine 1 in the left-right direction.

The cutting unit 3 is provided in front of the traveling unit 2. The cutting unit 3 includes a divider 31, a raising device 32, a cutting device 33, and a transport device 34. The divider 31 guides the grain culm in the field to the raising device 32. The raising device 32 causes the culm guided by the divider 31. The cutting device 33 cuts the culm caused by the raising device 32. The transport device 34 transports the grain culms cut by the cutting device 33 to the threshing section 4. FIG. 1 shows a vertical transfer device 134 and an auxiliary transfer device 135 as the transfer device 34.

The threshing section 4 is provided behind the cutting section 3. The threshing unit 4 includes a handling cylinder 42 housed in a handling room. Further, a feed chain 41 for transporting the culm from the cutting section 3 to the threshing section 4 is provided behind the cutting section 3 and in front of the threshing section 4. The feed chain 41 inherits the grain culm from the transport device 34 and transports it to the straw disposal unit 7. Further, a succession transfer device 136 that relays the transfer from the transfer device 34 to the feed chain 41 is provided in front of the feed chain 41. The handling cylinder 42 threshes the culm carried by the feed chain 41.

The sorting unit 5 is provided below the threshing unit 4. The sorting unit 5 includes a swing sorting device 51 and a wind sorting device 52. The rocking sorting device 51 sorts the threshed grains that have fallen from the threshing section 4 into grains and straw waste. The wind sorting device 52 further sorts the threshing sorted by the rocking sorting device 51 into grains, straw waste, and the like. The grains sorted by the rocking sorting device 51 and the wind sorting device 52 are transported to the storage unit 6. Straw dust and the like sorted by the rocking sorting device 51 and the wind sorting device 52 are discharged.

The storage section 6 is provided on the right side of the threshing section 4. The storage unit 6 includes a grain tank 61 and a discharge device 62. The grain tank 61 stores the grains transported from the sorting unit 5. The discharge device 62 can discharge the grains stored in the grain tank 61 to any place.

The straw waste processing unit 7 is provided behind the threshing unit 4. The straw discharge processing unit 7 is a portion that cuts and discharges the grain culm conveyed from the feed chain 41.

The power unit 8 is provided on the right side of the sorting unit 5. The power unit 8 includes an engine 8a. The engine 8a generates rotational power.

The control unit 9 is provided above the power unit 8. The control unit 9 includes a driver's seat 91 and a plurality of operating tools such as a handle 92, a main shift lever 93 (see FIG. 11), an auxiliary shift lever 94 (see FIG. 11), and a work clutch lever 95 (see FIG. 11). Be prepared.

The driver's seat 91 is a seat on which an operator sits. The handle 92 is a steering handle that changes the traveling direction of the combine 1. The main speed change lever 93 switches the traveling direction of the combine 1 by switching the three positions of "forward", "neutral", and "reverse" of the main transmission (not shown) of the transmission 21, and also switches the traveling direction and the reverse direction. The running speed of combine 1 is changed according to the amount of defeat. A main shift shift sensor 86 (see FIG. 10) that detects the operating position of the main shift lever 93 is connected to the main shift lever 93.

The auxiliary transmission lever 94 is an operating tool for setting and holding the output and the rotation speed of the transmission 21 within a predetermined range. The auxiliary transmission lever 94 operates the auxiliary transmission (not shown) of the transmission 21 and sets the output and rotation speed of the auxiliary transmission in three stages of standard (working speed), neutral (stop), and low speed (ridge). Set to the shift stage. That is, the auxiliary transmission lever 94 has three operation positions of "standard", "neutral", and "ridge" (see FIG. 11). An auxiliary shift shift sensor 87 (see FIG. 10) that detects each operating position of the auxiliary shift lever 94 is connected to the auxiliary shift lever 94.

The work clutch lever 95 is an operation means for switching the drive / stop of the cutting unit 3 and the threshing unit 4, and has three types of "cutting / threshing", "cutting / threshing", and "cutting / threshing". It has an operating position (see FIG. 11). A selection position sensor 88 (see FIG. 10) that detects each operating position of the work clutch lever 95 is connected to the work clutch lever 95.

The operator operates the combine 1 by appropriately operating each operating tool. With such a configuration, the operator can operate the combine 1 while seated in the driver's seat 91.

The combine 1 also includes a grain guide 40. The grain guide 40 holds the grain during the hand-handling operation and guides the grain to the feed chain 41. The grain guide 40 is provided on the left side of the combine 1. The grain culm guide 40 is rotatably configured around a rotation fulcrum provided on the cutting portion 3 side.

As shown in FIG. 2, the feed chain 41 is covered from the outside of the combine 1 by the side cover 43. The straw holding base cover 44 provided above the side cover 43 covers the handling body 42 (see FIG. 1) from the outside of the machine body. An emergency stop switch Sw0 is attached to the straw holding base cover 44. The emergency stop switch Sw0 is a pressing type switch whose on / off is switched by a pressing operation of an operator, and when it is switched on, the drive of the engine 8a is forcibly stopped and the drive of the feed chain 41 is stopped.

Next, the grain culm guide 40 will be described with reference to FIGS. 2 to 4.

As shown in FIG. 2, the culm guide 40 is supported by the guide frame 114 of the auxiliary transport device 135 via the rotating shaft 40a. The guide frame 114 supports a pinching guide (not shown) of the auxiliary transport device 135. Further, the guide frame 114 is fixed to the pulling / shifting case 35. The pulling / shifting case 35 accommodates a pulling vertical transmission shaft 162 (see FIG. 9) that transmits rotational power to the raising device 32 and a pulling / shifting device 170 (see FIG. 9) that shifts the output and rotation speed of the pulling device 32. There is.

As shown in FIGS. 3 and 4, the culm guide 40 is configured to be rotatable about a rotation shaft 40a between a state of being separated from the feed chain 41 and a state of being close to the feed chain 41. There is. The grain culm guide 40 shifts to a state approaching the feed chain 41 by rotating clockwise in the left side view of the combine 1. In the figure, arrows indicating the direction of rotation of the culm guide 40 are shown. The left side surface of the combine 1 is the direction in which the feed chain 41 shown in FIG. 3 is viewed from the paper surface.

A tension spring 40b is hooked on the grain guide 40 in the vicinity of the rotation shaft 40a. The tension spring 40b pulls the culm guide 40 toward a state separated from the feed chain 41.

The grain guide 40 can rotate the first switch Sw1 that permits the drive of the feed chain 41, the operation lever 401 as an operation tool for switching the first switch Sw1 on and off, and the operation lever 401. It has a frame plate 402 supported by the frame plate 402 and a guide rod 403 fixed to the frame plate 402. The rotating shaft 40a is fixed so as to be integrated with the frame plate 402, and is supported by the guide frame 114 so as to be relatively rotatable.

The rotating shaft 40a is inserted into the tubular member 405 so as to be relatively rotatable between the frame plate 402 and the back plate 404, and the bracket 406 is fixed to the outer peripheral surface of the tubular member 405 (see FIG. 6). By fixing the bracket 406 to the guide frame 114, the rotating shaft 40a and the culm guide 40 are rotatably supported by the guide frame 114. In this way, in the combine 1, the rotation fulcrum of the grain culm guide 40 is provided on the cutting portion 3 side.

The guide rod 403 has a gap between the facing portion 407 facing the feed chain 41 along the transport direction when it comes into contact with the grain culm and the gap curved from the facing portion 407 toward the rotation shaft 40a on the upper side of the facing portion 407. It includes a forming portion 408 and a tip portion 409 that is on the lower side of the facing portion 407 and is curved from the facing portion 407 in a direction away from the feed chain 41. With such a shape, the guide rod 403, as a pressing member, can come into contact with the grain culm in a state of approaching the feed chain 41 and press the grain culm against the feed chain 41. The guide rod 403 has a circular cross section as a polygonal shape.

Next, the structure around the grain guide 40 will be described.

In a state where the grain culm guide 40 is close to the feed chain 41, the grain culm guide 40 is arranged above the transfer transfer device 136 and the transfer start end portion 41a of the feed chain 41.

The inheritance transfer device 136 inherits the grain culm from the vertical transfer device 134. Further, the succession transfer device 136 has a chain (hereinafter referred to as a succession transfer chain) 137, and transfers the grain culm toward the feed chain 41. The inheritance transfer device 136 is provided between the transfer end portion of the vertical transfer device 134 and the transfer start end portion 41a of the feed chain 41 along the transfer start end portion 41a of the feed chain 41. The transport start end portion 138 of the inheritance transport device 136 is located in front of the transport start end portion 41a of the feed chain 41.

The inheritance transfer device 136 is arranged behind the vertical transfer device 134. Further, the inheritance transfer device 136 is arranged on the right side of the transfer start end portion 41a of the feed chain 41 (in other words, inside the body of the combine 1) and on the left side of the auxiliary transfer device 135. The transport start end portion 138 of the succession transport device 136 is located at the lower left of the transport end portion of the auxiliary transport device 135.

The inheritance transfer chain 137 rotates vertically and does not have a component of force for lateral transfer. Therefore, the succession transport chain 137 transports the grain culm rearward. In the plan view of the combine 1, the transport path of the inheritance transport chain 137 and the transport path of the feed chain 41 are substantially parallel (see FIG. 6) and face in the front-rear direction.

As shown in FIG. 3, the combine 1 is provided with a guide swash plate 45 that supports and waits for the grain culm during the hand-handling operation and guides the grain culm in accordance with the rotation of the grain culm guide 40. There is. The guide swash plate 45 is supported by the guide frame 114 behind the rotation shaft 40a. The guide swash plate 45 includes a pedestal 45a supported by the guide frame 114, and a slope 45b located behind the pedestal 45a and extending rearward and downward. The slope 45b is inclined downward along the transport direction of the succession transport chain 137 and the feed chain 41. The tip (lower end) 45c of the slope 45b is located above and behind the confluence 139 of the inheritance transfer chain 137 and the feed chain 41. With such a shape, the guide swash plate 45 can support the grain culm and prevent the grain culm from slipping down.

In addition to the first switch Sw1, the combine 1 includes a second switch Sw2 that allows the feed chain 41 to be driven. The second switch Sw2 is arranged at a position farther from the feed chain 41 than the grain guide 40, that is, in front of the grain guide 40. The second switch Sw2 is supported by the guide frame 114 in front of the rotation shaft 40a of the grain guide 40. The second switch Sw2 is switched on and off by a pressing operation of the operator. The second switch Sw2 is always off and can be switched on only while the operator is pressing it.

The combine 1 drives the feed chain 41 when the first switch Sw1 and the second switch Sw2 are switched on.

The grain culm guide 40 is provided with a rotation angle sensor 89 that detects the rotation angle of the frame plate 402 with respect to the body of the combine 1 (see FIG. 10). The rotation angle sensor 89 is composed of, for example, a potentiometer.

Next, the structure of the culm guide 40 for switching the first switch Sw1 on and off will be described with reference to FIGS. 5 and 6.

As described above, the grain guide 40 is provided with an operation lever 401 for operating the rotation of the grain guide 40. The operation lever 401 serves as a handle for operating the rotation of the grain guide 40.

As shown in FIG. 5, the first switch Sw1 is switched on and off according to the operation of the operating lever 401. The first switch Sw1 is switched on by rotating the operation lever 401 clockwise in the left side view of the combine 1 as shown by the arrow in the figure while the grain guide 40 is approaching the feed chain 41. Be done. After rotating the grain culm guide 40 toward the feed chain 41, the operator turns on the first switch Sw1 by operating the operation lever 401 so as to be closer to the feed chain 41, and turns on the operation lever 401. The first switch Sw1 can be turned off and switched on and off by operating the feed chain 41 so as to be separated from the feed chain 41.

As shown in FIG. 6, the rotation shaft 40a serving as a rotation fulcrum is sandwiched between the frame plate 402 and the back plate 404 and fixed so as to be integrated with them. Further, the stopper shaft 41s is sandwiched between the frame plate 402 and the back plate 404 and fixed to the frame plate 402 and the back plate 404, and the rotating shaft 40a, the stopper shaft 41s, the frame plate 402 and the back plate 404 are integrally integrated. It has become. The stopper shaft 41s extends in parallel with the rotation shaft 40a. The stopper shaft 41s sets the limit of the rotation range of the operating lever 401. The limit of the rotation range of the operating lever 401 is set at the position where the lever shaft of the operating lever 401 contacts the stopper shaft 41s.

The structure of the culm guide 40 will be described in detail with reference to FIGS. 8 (A), (B), (C), (D), and (E).

The back plate 404 is formed with a bent portion 40f bent toward the frame plate 402 along the axial direction of the rotating shaft 40a, and the first switch Sw1 is placed on the bent portion 40f. The button of the first switch Sw1 that is switched on by the pressing operation penetrates the hole 40p formed in the bent portion 40f.

The operation lever 401 is supported by the frame plate 402 so as to be relatively rotatable via the operation center shaft 40c. In the grain guide 40, the position of the operation center shaft 40c is arranged between the tip portion 409 of the guide rod 403 and the rotation shaft 40a. The operation lever 401 is connected to the link mechanism 411 on the frame plate 402 side and the link mechanism 412 on the back plate 404 side, and a rotary cylinder 413 is provided between the two link mechanisms 411 and 412.

A pivot 40d is inserted into the rotary cylinder 413. The pivot 40d is sandwiched between the frame plate 402 and the back plate 404 and extends parallel to the rotation shaft 40a. A pressing plate 414 is fixed to the outer peripheral surface of the rotating cylinder 413, and the pressing plate 414 rotates around the pivot axis 40d together with the rotating cylinder 413 in accordance with the rotation of the operating lever 401. When the pressing plate 414 moves in response to the rotation of the operating lever 401 in the direction close to the guide rod 403, the button of the first switch Sw1 is pressed by the pressing plate 414. Each end of the torsion coil spring 410 that urges the operating lever 401 in a direction away from the guide rod 403 is hooked on the operating lever 401 and the back plate 404. The operating lever 401 can be returned to its original position from a state close to the feed chain 41 by the torsion coil spring 410.

The first switch Sw1 is not limited to the one provided on the grain guide 40, and may be supported by a rigid body in the cutting portion 3, for example, a frame member of the cutting portion 3 such as a guide frame 114. ..

Next, a structure capable of pressing the culm from above the inheritance transfer device 136 during the hand-handling operation will be described.

As shown in FIG. 6, the guide swash plate 45 is arranged on the guide frame 114 so that the guide swash plate 45 is arranged between the frame plate 402 and the back plate 404 of the grain culm guide 40 along the left-right direction of the combine 1. 45 and the grain guide 40 are supported. When the grain guide 40 rotates toward the feed chain 41, the guide swash plate 45 is shielded by the frame plate 402 in the left side view of the combine 1 (see FIG. 4). Note that FIG. 6 shows the front-rear direction and the left-right direction of the combine 1.

As shown in FIG. 8B, a torsion spring 415 as another pressing member is connected to the link mechanisms 411 and 412. Like the guide rod 403, this pressing member has a polygonal cross section, more preferably a circular cross section. As shown in FIG. 5, the torsion spring 415 moves toward the inheritance transfer device 136 in response to the movement of the operating lever 401, and comes into contact with the culm in a state of approaching the inheritance transfer chain 137, and the inheritance transfer chain It is a pressing member that presses the grain lever against 137.

As shown in FIG. 8 (E), the fixed end portion 416 as one end portion of the torsion spring 415 is attached to the rotating plate 420 so as to be relatively immovable. The rotating plate 420 is supported by the back plate 404 so as to be relatively rotatable, and is connected to the link mechanism 412. The torsion spring 415 is on the upper side of the facing portion 417 facing the inherited transport chain 137 along the transport direction when it comes into contact with the grain culm, and is curved from the facing portion 417 toward the fixed end portion 416. The gap forming portion 418 is included, and the tip portion 419 which is on the lower side of the facing portion 417 and is curved from the facing portion 417 in the direction away from the inheritance transfer chain 137.

The support shaft 40e is fixed to the back plate 404 at a position separated from the operation center shaft 40c along the lever shaft of the operation lever 401. The rotary plate 420 is rotatably supported by the back plate 404 via a support shaft 40e. Since the fixed end 416 of the torsion spring 415 is attached to the rotating plate 420 so as not to be relatively movable, the torsion spring 415 can rotate relative to the back plate 404 together with the rotating plate 420 via the support shaft 40e. When the operating lever 401 rotates in a direction close to the guide rod 403, the link mechanisms 411 and 412 operate in response to the rotation of the operating lever 401, and the rotating plate 420 rotates around the support shaft 40e. As a result, the torsion spring 415 moves downward, that is, toward the inheritance transfer device 136. On the other hand, the deformation and pressing force of the torsion spring 415 due to the operation of the operating lever 401 are eliminated by its own spring force when the operating lever 401 returns to its original position by the torsion coil spring 410.

As shown in FIGS. 3 and 4, when the grain culm guide 40 rotates from above toward the feed chain 41 during the hand-handling operation, the grain culm is formed on the lower surface of the guide rod 403 and the surface of the slope 45b. Is pushed backward and downward along the surface of the slope 45b in response to the rotation of the culm guide 40 while being sandwiched. As a result, the grain guide 40 and the guide swash plate 45 can smoothly move the grain from the tip 45c of the slope 45b onto the feed chain 41 in accordance with the rotation. At this time, since the transport start point of the grain culm can be located behind the confluence portion 139, that is, the front end portion of the feed chain 41, the grain culm is affected by the wraparound of the succession transport chain 137 at the confluence portion 139. It can move smoothly on the feed chain 41 without any need.

As shown in FIG. 7, when the grain guide 40 rotates downward toward the feed chain 41, the guide rod 403 comes into contact with the grain G and can press the grain G against the feed chain 41. At this time, the facing portion 407 of the guide rod 403 can press the stock base side of the grain culm G.

Further, when the operating lever 401 is operated so as to switch the first switch Sw1 on, the torsion spring 415 moves downward according to the rotation of the operating lever 401 (see FIG. 5) and is deposited on the slope 45b. The grain G can be moved away from the guide swash plate 45, and the grain G can be pressed against the succession transfer chain 137. At this time, the facing portion 417 of the torsion spring 415 can press the tip side of the grain culm G. In FIG. 7, a small amount of grain culm G is shown for convenience in order to ensure the visibility of the figure, instead of the bundled grain culm. The number of culm G actually pressed by the culm guide 40 during the hand-handling operation is larger than that shown in FIG. 7, and may be bundled.

Further, the slope 45b of the guide swash plate 45 and the feed chain 41 form a substantially V-shaped structure. When the culm G is placed on the structure during the hand-handling operation, the structure can stably support the culm G so that the culm G does not spill. The guide rod 403 and the torsion spring 415 of the grain guide 40 are provided with slopes 45b from both sides of the guide swash plate 45, respectively, on the stock root side and the tip side of the grain culm G that is stably supported in this way. It can be smoothly extruded along the surface of the feed chain 41 and effectively pressed against the feed chain 41 and the succession transfer chain 137. In this way, the combine 1 smoothly moves the grain culm G downward along the surface of the slope 45b by the guide rod 403 and the torsion spring 415, and then connects the tip side and the stock root side of the grain culm G. Since both can be pressed at the same time, it is possible to prevent the grain culm G from bending and stably transport the grain culm G.

Next, the power transmission mechanism of the combine 1 will be described. In the following, the main part of the power transmission mechanism and the part related to the present invention will be described, and the description of other parts will be omitted.

The power transmission mechanism of the combine 1 includes a transmission 21, a transmission device 186 for the threshing section, a transmission device 187 for the feed chain, and a rotating shaft and a belt for transmitting the rotational power of the engine 8a to other parts. ..

The engine 8a is provided with an output pulley 181. The rotational power from the engine 8a is transmitted to the transmission 21 via the output pulley 181 and is transmitted from the transmission 21 to the traveling unit output pulley 141. In this way, the rotational power of the engine 8a is input to the transmission 21 via the belt wound around the output pulley 181 of the engine 8a. The transmission 21 includes a continuously variable transmission 23. The continuously variable transmission 23 converts the rotational power of the engine 8a into hydraulic power and then converts it into rotational power again to drive the crawler type traveling devices 22 and 22. With such a configuration, the transmission 21 can change the driving state of the crawler type traveling devices 22 and 22, and the combine 1 can be traveled in an arbitrary direction.

A belt is wound between the output pulley 181 and the input pulley 182, and rotational power is transmitted from the output pulley 181 to the input pulley 182. The input pulley 182 is fixed to one end of the power transmission first shaft 183. The other end side of the power transmission first shaft 183 is housed in the power transmission case 185.

Further, the rotational power is transmitted from the traveling unit output pulley 141 to the cutting unit first input pulley 142. A belt is wound between the traveling unit output pulley 141 and the cutting unit first input pulley 142. Further, the rotational power is also transmitted from the threshing section output pulley 143 to the cutting section second input pulley 144. The cutting section first input pulley 142 and the cutting section second input pulley 144 are fixed to one end of the cutting first shaft 147 constituting the cutting input shaft. An auxiliary transport drive case 210 of the auxiliary transport device 135 is fixed to the other end of the cutting first shaft 147. A belt is wound between the threshing section output pulley 143 and the cutting section second input pulley 144, and a tension clutch 145 is provided on this belt.

During normal work, the tension clutch 145 is switched to the off state, and power is transmitted from the traveling unit output pulley 141 to the cutting unit first input pulley 142. Further, even when the traveling unit 2 is stopped, the threshing unit 4 is driven when only the pouring operation of the grain culm is performed. At this time, the tension clutch 145 is switched to the on state, so that power is transmitted from the threshing section output pulley 143 to the cutting section second input pulley 144.

The transmission device 186 for the threshing section is housed in the power transmission case 185. The transmission device 186 for the threshing section transmits rotational power to the threshing section 4, and has a power transmission second shaft 191 and a threshing section output shaft 192.

Further, the feed chain transmission device 187 includes a feed chain transmission case 201, a shift input shaft 194 penetrating the feed chain transmission case 201, and a feed chain transmission provided outside the body of the feed chain transmission case 201. It has a belt-type continuously variable transmission 208, which is a mechanism, and a speed change output shaft 260 that outputs power output from the belt-type continuously variable transmission 208.

Power transmission second from the power transmission first shaft 183 by transmitting rotational power between the gear provided at the other end of the power transmission first shaft 183 and the gear provided at one end of the power transmission second shaft 191. The rotational power is transmitted to the shaft 191. A bevel gear is fixed in the middle of the power transmission second shaft 191, and rotational power is transmitted to the threshing section output shaft 192 via the bevel gear. The threshing section output shaft 192 is a shaft for transmitting rotational power to a handling cylinder and a straw waste processing device (not shown).

By transmitting rotational power between the gear provided at the other end of the power transmission second shaft 191 and the gear provided at one end of the shift input shaft 194, the power transmission second shaft 191 is transferred to the shift input shaft 194. Rotational power is transmitted. An input pulley 220 of the belt-type continuously variable transmission 208 is provided at the other end of the speed change input shaft 194.

Further, the input pulley 220 transmits rotational power to the output pulley 250 via the belt 290. The output pulley 250 outputs rotational power to the speed change output shaft 260.

A power transmission sprocket 195 is provided at the end of the speed change output shaft 260, and rotational power is transmitted to the power transmission sprocket 196 which is fitted in the speed change input shaft 194 so as to be relatively rotatable via the power transmission sprocket 195. Be transmitted. The gear attached to the power transmission sprocket 196 transmits power to the feed chain output shaft 199 via a power transmission mechanism 198 composed of a plurality of gears. The two power transmission sprockets 195 and 196 and the power transmission mechanism 198 are housed in the feed chain transmission case 201.

Further, the power transmission mechanism 198 is provided with a feed chain stop mechanism 193. The feed chain stop mechanism 193 is a mechanism for switching on / off of power transmission to the feed chain 41. The feed chain stop mechanism 193 is composed of a clutch mechanism including a planetary gear mechanism provided on the switching shaft 202. A clutch is fixed to the switching shaft 202 so as to be slidable along the axial direction of the switching shaft 202.

A hydraulic actuator 204 is connected to the switching shaft 202 via a link mechanism 203. The hydraulic actuator 204 moves the link mechanism 203 by expanding and contracting. A two-position four-port solenoid valve 206 is provided in the oil passage of the hydraulic actuator 204. When the solenoid is excited in the solenoid valve 206, the hydraulic actuator 204 is extended, and when the excitation of the solenoid is released, the hydraulic actuator 204 is shortened. When the hydraulic actuator 204 is extended, the clutch is separated from the gear and switched to the disengaged state, and when the hydraulic actuator 204 is shortened, the clutch is connected to the gear so as not to rotate relative to the gear and is switched to the engaged state.

The solenoid valve 206 is controlled by the control device 80, and when a pulse signal is received from the control device 80, the pulse signal is sent to the solenoid. The control device 80 is also connected to the engine 8a. For example, when the power supply of the control device 80 is cut off, the driving of the engine 8a is also stopped. When the power supply of the control device 80 is cut off (when the drive of the engine 8a is stopped), the combine 1 can shorten the hydraulic actuator 204 to drive the feed chain stop mechanism 193. As a result, the transmission of the rotational power to the feed chain 41 is cut off, and the feed chain 41 can be forcibly stopped. However, the feed chain stop mechanism 193 may be driven by an electric actuator instead of the hydraulic actuator, and the present invention is not limited.

When the shift input shaft 194 is rotated by the rotational power transmitted from the engine 8a, the input pulley 220 is also rotated together with the shift input shaft 194. When the input pulley 220 rotates, the output pulley 250 rotates via the belt 290. The speed change output shaft 260 is rotated by the rotation of the output pulley 250, and rotational power is output from the speed change output shaft 260 toward the feed chain 41.

The speed change output shaft 260 is connected to the power transmission sprocket 195/196 and the power transmission mechanism 198 in the transmission case 201 for the feed chain, and the feed chain rotation sprocket 205 is connected to the feed chain output shaft 199 connected to the power transmission mechanism 198. It is provided. The feed chain rotating sprocket 205 is arranged at the lower front portion of the feed chain 41 (see FIG. 3), and the combine 1 can drive the feed chain 41 by rotating the feed chain rotating sprocket 205.

The groove width of the input pulley 220 and the groove width of the output pulley 250 change according to the drive of the motor 310. When the shaft of the motor 310 rotates in one direction (positive direction) in response to the drive of the motor 310, the diameter of the belt 290 wound around the input pulley 220 by the output of the motor 310 increases. Since the total length of the belt 290 is constant, when the diameter of the belt 290 wound around the input pulley 220 is increased, the groove width of the output pulley 250 is widened, and the diameter of the belt 290 wound around the output pulley 250 (hereinafter referred to as). , Simply referred to as "output pulley diameter") becomes smaller. In this case, the gear ratio of the belt-type continuously variable transmission 208 changes to the speed-increasing side. As a result, the speed of the feed chain rotating sprocket 205 is increased, and the transfer speed of the feed chain 41 can be changed to the speed increasing side. For example, when the traveling speed of the combine 1 is increased, the transport efficiency can be improved by changing the transport speed of the feed chain 41 to the speed increasing side.

On the other hand, when the shaft of the motor 310 rotates in the other direction (reverse direction) in response to the drive of the motor 310, the diameter of the belt 290 wound around the input pulley 220 by the output of the motor 310 is reduced. When the diameter of the belt 290 wound around the input pulley 220 becomes smaller, the groove width of the output pulley 250 becomes narrower and the output pulley diameter becomes larger. In this case, the gear ratio of the belt-type continuously variable transmission 208 changes to the deceleration side. As a result, the feed chain rotating sprocket 205 is decelerated, and the transport speed of the feed chain 41 can be changed to the deceleration side. For example, when the traveling speed of the combine 1 decreases, the transport efficiency can be improved by changing the transport speed of the feed chain 41 to the deceleration side. In this way, the belt-type continuously variable transmission 208, which is a feed chain transmission mechanism, can synchronize the transport speed of the feed chain 41 and the cutting speed of the cutting unit 3 with the traveling speed of the combine 1.

Next, the control system of the combine 1 will be described.

As shown in FIG. 10, the hydraulic actuator 204 is connected to a control device 80 capable of transmitting a control signal to the solenoid valve 206. As described above, the hydraulic actuator 204 provided with the solenoid valve 206 is connected to the feed chain stop mechanism 193 that changes the transmission or interruption of power to the cutting unit 3. The control device 80 is connected to a first switch Sw1 and a second switch Sw2 capable of transmitting an input signal to the control device 80. The first switch Sw1 and the second switch Sw2 can instruct the control device 80 of the operating state of the feed chain stop mechanism 193. Then, the control device 80 can change the connection / disconnection of the feed chain stop mechanism 193. The control device 80 can transmit a control signal to the solenoid valve 206, and can control the disconnection and disconnection of the feed chain stop mechanism 193. Further, the control device 80 is connected to the above-mentioned emergency stop switch Sw0, and the emergency stop switch Sw0 can transmit an input signal to the control device 80.

The control device 80 is connected to a traveling speed sensor 85 that detects the traveling speed of the combine 1, and the traveling speed sensor 85 grasps the traveling state of the combine 1. Further, the main shift shift sensor 86, the auxiliary shift shift sensor 87, and the selection position sensor 88 are connected to the control device 80. Further, a rotation angle sensor 89 is connected to the control device 80. In this way, the control device 80 grasps the traveling state of the combine 1, the operating position of the main shifting lever 93, the operating position of the auxiliary shifting lever 94, the operating position of the work clutch lever 95, and the operating amount of the grain guide 40. Has been done.

The control device 80 permits the feed chain 41 to be driven with the feed chain stop mechanism 193 turned on, provided that the work clutch lever 95 is operated to the operation position for threshing and the combine 1 is in the running state. When the stop of the combine 1 is detected, the feed chain stop mechanism 193 is turned off and the drive of the feed chain 41 is stopped. Further, when the first switch Sw1 and the second switch Sw2 are simultaneously turned on after the feed chain stop mechanism 193 is turned off, the feed chain stop mechanism 193 is connected and the feed chain 41 is driven. To do.

When the feed chain stop mechanism 193 is switched to the connection and the rotational power is transmitted to the feed chain 41, the rotational speed of the feed chain 41 is increased or decreased by the drive of the motor 310. The downward rotation amount of the grain guide 40, that is, the rotation angle of the grain guide 40 is detected by the rotation angle sensor 89. The control device 80 can control the rotation direction and rotation speed of the motor 310 according to the rotation angle detected by the rotation angle sensor 89.

The combine 1 can reduce the driving speed of the feed chain 41 according to the size of the rotation angle in consideration of the relationship between the amount of the grain culm and the size of the rotation angle of the grain culm guide 40. For example, when the downward rotation amount of the grain culm guide 40 is small (the rotation angle θ is small), it is assumed that the amount of grain culm is relatively large, so that the combine 1 sets the driving speed of the feed chain 41. The motor 310 is driven in the forward rotation direction in order to increase the speed. On the other hand, when the amount of rotation of the grain guide 40 is large (the rotation angle θ is large), it is assumed that the amount of grain is relatively small, so that the motor 310 is used to reduce the driving speed of the feed chain 41. Is driven in the reverse rotation direction.

In the combine 1, an auxiliary operation switch Sw3 as an auxiliary operation means for forcibly driving the feed chain 41 is connected to the control device 80. By operating the auxiliary operation switch Sw3, the control device 80 transmits a control signal to the feed chain stop mechanism 193 to control the connection and disconnection thereof.

Next, the operating conditions of the auxiliary operation switch Sw3 will be described with reference to FIGS. 11 and 12.

As shown in FIG. 11, the auxiliary operation switch Sw3 is provided on the main shift lever 93. The auxiliary operation switch Sw3 is arranged at a position in the main shift lever 93 so that the operator can operate the auxiliary operation switch Sw3 while operating the main shift lever 93.

The auxiliary operation switch Sw3 is, for example, when the operator confirms that the culm is clogged at the entrance of the handling chamber of the threshing section 4 when the feed chain 41 is stopped, the transport device of the cutting section 3 is used. The feed chain 41 is driven by operating the auxiliary operation switch Sw3 when the operator confirms that the culm is clogged, which is a means for solving a temporary problem. In this way, the combine 1 is a third switch for switching the connection and disconnection of the feed chain stop mechanism 193, in addition to the first switch Sw1 and the second switch Sw2 that drive the feed chain 41 during the hand-handling work. It is equipped with an auxiliary operation switch Sw3.

As shown in FIG. 12, the work clutch lever 95 is operated regardless of the operation position of the main shift lever 93 (even when the main shift lever 93 is operated in any of "forward", "neutral", and "reverse"). When the auxiliary operation switch Sw3 is turned on and operated in the situation where the operation is "cutting / threshing", the feed chain 41 is set to a predetermined time limit (time required for a series of operations from cutting to threshing, for example. It works only for 5 seconds). In this case, the operating position of the auxiliary transmission lever 94 may be any of "standard", "neutral", and "ridge". However, the cutting unit 3 does not operate because the transmission of the rotational power is cut off by the operation of the work clutch lever 95. By setting the drive time of the feed chain 41 in this way, it is possible to work efficiently without unnecessarily prolonging the drive. Note that this time limit sets the maximum value for continuous driving, and the feed chain 41 may be operated only while the auxiliary operation switch Sw3 is pressed (however, within the time limit).

When the auxiliary operation switch Sw3 is turned on and operated while the main speed change lever 93 is operated "forward" and the work clutch lever 95 is operated "cutting / threshing", the feed chain 41 and the cutting section 3 are operated. Operates only for a predetermined time limit (time required for a series of operations from cutting to threshing, for example, 5 seconds). In this case, the operating position of the auxiliary transmission lever 94 may be any of "standard", "neutral", and "ridge". The drive speed of the feed chain 41 and the cutting unit 3 at this time is set to a speed corresponding to the amount of tilting of the main speed change lever 93. That is, the cutting unit 3 operates in a state in which the tension clutch 145 is disengaged and synchronized with the traveling speed. Further, the feed chain 41 is operated in a state synchronized with the traveling speed by the power transmission mechanism 198 and the belt type continuously variable transmission 208. Even in this case, the work can be performed efficiently by setting a limit on the driving time of the feed chain 41 and the cutting unit 3.

On the other hand, even if the operation position of the work clutch lever 95 is "cutting / threshing" regardless of the operation position of the auxiliary shift lever 94, if the operation position of the main shift lever 93 is "reverse", the auxiliary operation is performed. Even if the switch Sw3 is turned on and operated, the operation of the cutting unit 3 and the feed chain 41 is stopped.

Auxiliary operation switch Sw3 in a situation where the main shift lever 93 is operated to "neutral", the auxiliary shift lever 94 is operated to "standard", and the work clutch lever 95 is operated to "cut / thresh". When the lever is turned on, the operation of the cutting unit 3 is stopped, and only the feed chain 41 operates for the above time limit. In this way, when the grain culm is clogged at the entrance to the threshing section 4 during the cutting operation, the feed chain 41 starts driving by turning on the auxiliary operation switch Sw3 and operating the grain culm to the threshing section 4. It will be possible to send.

Next, the hand-handling work of the combine 1 will be described with reference to FIGS. 13 (A), 13 (B), (C), and (D). The hand-handling work is performed in a state where the combine 1 is stopped, that is, when the crawler type traveling devices 22 and 22 are stopped and the feed chain 41 is stopped.

As shown in FIG. 13A, the operator rotates the culm guide 40 upward to separate it from the feed chain 41. At this time, since the feed chain 41 has been stopped from the beginning, the feed chain 41 will continue to be stopped.

When the operator rotates the grain culm guide 40 upward, the operator can rotate the grain culm guide 40 upward by grasping and operating the operation lever 401 or the guide rod 403. The combine 1 is provided with a grain culm guide operation lever (not shown) connected to the grain culm guide 40, and the operator operates the culm guide operation lever while sitting in the driver's seat 91. As a result, the grain culm guide 40 can be rotated upward before the hand-handling work is started.

Next, as shown in FIG. 13 (B), the worker puts the cut grain culm G in a predetermined place. Here, the predetermined place is a space where the grain culm G can be pressed against the feed chain 41 by the guide rod 403 when the grain culm guide 40 is rotated downward, and is the surface of the slope 45b. It is a space above the substantially V-shaped support structure sandwiched between the feed chain 41 and the outbound route of the feed chain 41.

After that, as shown in FIG. 13C, the operator rotates the culm guide 40 downward to bring it closer to the feed chain 41. As a result, the grain culm G can be pressed against the feed chain 41 by the guide rod 403. However, since the first switch Sw1 is turned off because the operating lever 401 is not operated, the control device 80 maintains the feed chain stop mechanism 193 disconnected even if the second switch Sw2 is pressed. ..

Then, as shown in FIG. 13 (D), the operator maintains the state in which the guide rod 403 presses the culm G against the feed chain 41 by rotating the operation lever 401 toward the feed chain 41. While switching the first switch Sw1 on. At this time, the operation of the operation lever 401 for switching the first switch Sw1 to ON is an operation in which the grain culm guide 40 presses the grain culm against the feed chain 41. Further, the operator pushes the second switch Sw2 while pushing down the operation lever 401 toward the feed chain 41 to switch the second switch Sw2 on. At this time, the operator keeps the state in which the second switch Sw2 is switched on while maintaining the state in which the second switch Sw2 is pressed. Then, the control device 80 switches the feed chain stop mechanism 193 to the connection in response to the fact that both the first switch Sw1 and the second switch Sw2 are turned on. As a result, the rotational power of the engine 8a is transmitted to the feed chain 41.

With such a configuration, the operator grips the operating lever 401 of the culm guide 40 with one hand and operates the second switch Sw2 with the other hand. That is, the operator keeps pushing the operation lever 401 toward the feed chain 41 with his right hand to keep the first switch Sw1 turned on, and pushes the second switch Sw2 with his left hand. By maintaining this, the feed chain 41 can be driven by continuing the state in which the second switch Sw2 is switched on.

In the combine 1, the rotation shaft 40a of the grain culm guide 40 is provided on the cutting portion 3 side. As a result, by operating the operation lever 401 in which the grain culm guide 40 presses the grain culm against the feed chain 41, that is, by operating the operation lever 401 for switching the first switch Sw1 on, the grain culm is operated along the transport direction of the feed chain 41. The force acting to feed the culm can be easily applied to the culm. Therefore, the amount of force acting to feed the culm along the transport direction of the feed chain 41 can be easily and directly adjusted according to the amount of operation of the operation lever 401 by the operator, and the transport posture of the culm can be further adjusted. Can be maintained in a stable state.

As described above, according to the combine 1, since the rotation shaft 40a of the culm guide 40 is provided on the cutting portion 3 side, the culm guide 40 presses the culm against the feed chain 41 by operating the operation lever 401. Occasionally, a force acting to feed the culms from the cutting section 3 side toward the grain removal section 4 side, that is, along the transport direction of the feed chain 41 can be easily applied to the culms. Therefore, the amount of force applied to the threshing section 4 side can be easily and directly adjusted according to the amount of operation of the operating lever 401 by the operator, and the transport posture of the culm can be maintained in a more stable state. Therefore, it is possible to provide the combine 1 capable of stabilizing the transport posture of the grain culm during the hand-handling work.

Further, since the rotation shaft 40a is provided on the cutting portion 3 side as a rotation fulcrum, the transfer resistance can be reduced, and the retention of the culm due to the wraparound of the inheritance transfer chain 137 can be eliminated or reduced. Therefore, not only the transport posture of the grain culm is improved, but also the operation of the grain culm guide 40 by the operator during the hand-handling work can be labor-saving and easy, so that the hand-handling work can be carried out efficiently. Further, by improving the transport posture of the grain culm, it is possible to eliminate or reduce the retention of the grain culm between the cutting section 3 side and the feed chain 41, so that the operator operates the grain culm guide 40 again. It is possible to reduce the frequency of unnecessary work such as resetting the grain culm and to carry out the hand-handling work efficiently.

Since the rotary shaft 40a is provided on the cutting portion 3 side, the rotary shaft 40a is arranged at a position away from the feed chain 41. Therefore, when the culm guide 40 rotates in the direction away from the feed chain 41, the grain removal portion 4 Compared with the case where the rotation fulcrum is provided on the side, the grain culm guide 40 can be moved to a position away from the feed chain 41, and the space where the grain culm is placed can be greatly opened near the entrance of the handling room. Therefore, the grain culm guide 40 can prevent the grain culm from falling off without interfering with the work, and the hand-handling work can be efficiently performed.

According to the combine 1, the operator's hands are separated from the feed chain 41 to the cutting section 3 side, and then one of the workers' hands is used to operate the operation lever 401 for pressing the grain culm against the feed chain 41. By using the other hand to operate the second switch Sw2 that can instruct the drive of the feed chain 41, it is possible to efficiently carry out the hand-handling work using both hands of the operator and to stabilize the transport posture of the grain culm. Can be done.

According to the combine 1, the first switch is rotated by the clockwise rotation of the operation lever 401 in accordance with the direction of rotation of the grain culm guide 40 from the cutting section 3 side to the threshing section 4 side. Since Sw1 can be switched on, the operator can easily and continuously operate the grain culm guide 40 from the rotation of the grain culm guide 40 to the switching of the first switch Sw1 to on, and the grain. The transport posture of the culm can be stabilized. As described above, the culm guide 40 is improved in operability. Therefore, the grain culm guide 40 with improved operability can efficiently carry out the hand-handling work and stabilize the transport posture of the grain culm.

According to the combine 1, the gap forming portion 408 of the guide rod 403 is curved from the facing portion 407 toward the rotation shaft 40a, so that a gap can be formed between the upper side of the guide rod 403 and the feed chain 41. It is possible to stabilize the transport posture of the grain culm while reducing the transport resistance to the grain culm waiting on the cutting unit 3 side. Further, since the tip portion 409 of the guide rod 403 is curved from the facing portion 407 in the direction away from the feed chain 41, a gap can be formed between the lower side of the guide rod 403 and the feed chain 41. The feed chain 41 can transport the grain culm while keeping the transport posture of the grain culm stable without hindering the transport of the grain culm, and the grain culm can be stably taken into the handling chamber.

According to the combine 1, since both the tip side and the stock root side of the grain culm can be pressed at the same time by a plurality of pressing members of the guide rod 403 and the torsion spring 415, bending of the grain culm can be prevented and the grain can be pressed. The transport posture of the culm can be maintained in a more stable state.

Next, combine 1 of another embodiment will be described with reference to FIG. In the present embodiment, the same components as those described above are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 14, the combine 1 has a structure in which only the second switch Sw4 on the threshing section 4 side is provided instead of the second switch Sw2 on the cutting section 3 side.

The second switch Sw4 on the threshing section 4 side functions in the same manner as the second switch Sw2 on the cutting section 3 side. The second switch Sw4 on the threshing section 4 side is attached to the straw holding base cover 44. The second switch Sw4 on the threshing unit 4 side is arranged in front of the emergency stop switch Sw0. Similar to the second switch Sw2 on the cutting unit 3 side, the control device 80 is connected to the second switch Sw4 on the threshing unit 4 side (not shown), and the second switch Sw4 on the threshing unit 4 side is a control device. The input signal can be transmitted to 80.

According to such a configuration, the operator keeps pushing down the operation lever 401 toward the feed chain 41 with the left hand to keep the first switch Sw1 turned on, and the second switch with the right hand. By maintaining the state in which Sw2 is pressed, the state in which the second switch Sw2 is switched on can be continued, and the feed chain 41 can be driven. Further, since the hand-handling work can be performed while observing the grain culm moving on the feed chain 41 from the front, the transport posture of the grain culm can be corrected each time and threshing can be performed accurately.

Next, combine 1 of another embodiment will be described with reference to FIG. In the present embodiment, the same components as those described above are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 15, the combine 1 has a structure in which the second switch Sw2 on the cutting section 3 side and the second switch Sw4 on the threshing section 4 side are provided.

According to such a configuration, the two second switches Sw2 and Sw4 can be selectively used according to the dominant hand of the operator, so that both dominant hands can be supported. Since the hand in which the worker holds the culm during hand-handling work differs depending on the dominant arm, for example, from the state where the worker presses the culm downward with the right hand, move the operating lever 401 with the left hand while separating the right hand from the culm. Operate the culm guide 40 closer to the feed chain 41, and further switch the first switch Sw1 on. After that, the operator keeps the state where the second switch Sw4 on the threshing section 4 side is turned on while maintaining the state where the second switch Sw4 on the threshing section 4 side is pressed by the right hand away from the culm. Can drive the feed chain 41. On the other hand, from the state where the operator presses the hand cutting culm downward with his left hand, while separating his left hand from the culm, he operates the operation lever 401 with his right hand to bring the culm guide 40 closer to the feed chain 41, and further the first switch. Switch Sw1 on. After that, the operator keeps pressing the second switch Sw2 on the cutting unit 3 side with the left hand away from the culm while keeping the second switch Sw2 on the cutting unit 3 side turned on. Can drive the feed chain 41.

Next, the pinching device 46 and the pinching release device 50 of the feed chain 41 will be described with reference to FIGS. 16A and 16B.

As shown in FIG. 16A, the threshing section 4 is provided with a pinching device 46. The pinching device 46 is arranged above the outward path of the feed chain 41 along the transport direction of the feed chain 41, and has a structure capable of pressing the culm toward the feed chain 41. The pinching device 46 includes a pinching rail 460, a plurality of spring members 464, and a spring frame 465. The sandwiching rail 460 includes a plurality of rail members 461, 462, 463, and the like formed so as to have a substantially U-shaped cross section, respectively. By connecting two adjacent rail members to each other via a spring member 464, a plurality of rail members 461, 462, 463, ... Consists of the sandwiching rail 460.

The plurality of spring members 464 are arranged at predetermined intervals along the transport direction and are connected to the rail members 461, 462, 463, and so on. The plurality of spring members 464 are suspended from the spring frame 465 supported by the airframe frame 20 (see FIG. 1). Each spring member 464 includes a shaft 466 and a coil spring 467 into which the shaft 466 is inserted. The coil spring 467 can be expanded and contracted between the upper and lower spring bases 468 which are supported by the spring frame 465 and the sandwiching rail 460 so as not to be relatively movable. Each upper spring base 468 is supported by a spring frame 465, and each lower spring base 468 is connected to two rail members arranged in the front-rear direction among a plurality of rail members 461, 462, 463, and so on. There is. That is, the shaft 466 of the frontmost spring member 464 is connected to the rear side of the frontmost rail member 461 and the front side of the second rail member 462 from the front. The shaft 466 of the second spring member 464 from the front is connected to the rear side of the second rail member 462 from the front and the front side of the third rail member 463.

When the feed chain 41 conveys the grain culm, the grain culm is sandwiched between the feed chain 41 and the sandwiching rail 460, and the rail members 461, 462, 463, ... Are separated from the feed chain 41. The spring force of each coil spring 467 changes according to the amount of movement of each rail member 461, 462, 463, ... In this way, the pinching device 46 can press the culm moving on the feed chain 41 by the spring force of each coil spring 467.

A swash plate 47 having surfaces facing the front and above of the combine 1 is fixed to the top surface of the front rail member 461 of the sandwiching rail 460, and the swash plate 47 and the rail member 461 are integrated. According to the pinching rail 460 having no swash plate 47, the amount of grain culms is relatively large, and the grain culms transported in a thick bundle can hold the pinching rail 460 from above the tip of the pinching rail 460. It may get over. However, according to the pinching rail 460 having the swash plate 47, the grain culm moving above the tip of the rail member 461 can be slid down from the swash plate 47, and the grain culm is deposited above the pinching rail 460. Can be prevented.

On the other hand, especially in the hand-handling work, when the amount of culms is small, the culms do not bite between the feed chain 41 and the pinching rail 460, and the culms are in the forefront with respect to the drive of the feed chain 41. May repeatedly come into contact with the rail member 461 and stay near the tip of the pinching rail 460. However, the combine 1 has a structure capable of preventing the culm from staying near the tip of the pinching rail 460.

The combine 1 includes a pinching release device 50. The pinching release device 50 has a structure in which at least the foremost rail member 461 is forcibly moved away from the feed chain 41 as the tip end portion of the pinching rail 460.

The pinching release device 50 includes a missing tooth gear 502 having an arm 501 and an arm actuator 503 having a motor shaft 504. A pin 469 protruding from the surface of the shaft 466 is fixed to the shaft 466 of the foremost spring member 464. At a position close to the foremost spring member 464, the spring frame 465 supports the missing gear 502 and the arm actuator 503. The missing tooth gear 502 is arranged at a position where the arm 501 is hooked on the pin 469. The teeth of the missing gear 502 are meshed with the gear 505 of the motor shaft 504.

The arm actuator 503 may be a hydraulic actuator as long as it can lift the shaft 466 of the spring member 464 against the spring force of the coil spring 467 via the missing gear 502, and is well known. The electric motor or actuator of the above can be used as the arm actuator 503. The control device 80 described above is connected to the arm actuator 503 (see FIG. 10).

When the combine 1 is switched to the hand-held mode, that is, the above-mentioned work clutch lever 95 is operated to the operation position of "cutting / threshing", and the control device 80 is operated based on the signal from the selection position sensor 88. Upon recognizing the operating position of the work clutch lever 95, the control device 80 rotates the arm actuator 503 in one direction. When the arm actuator 503 rotates in one direction, the missing tooth gear 502 rotates via the gear 505, as indicated by the arrow in the figure. This allows the arm 501 to lift the shaft 466 via the pin 469.

As shown in FIG. 16B, when the shaft 466 is lifted by the arm 501, the front rail member 461 and the second rail member 462 move in a direction away from the feed chain 41 against the spring force. In this way, by operating the pinching release device 50, the tip of the pinching rail 460 is forcibly moved away from the feed chain 41, and the tip of the pinching rail 460 with respect to the feed chain 41, that is, the frontmost portion. The pinching between the rail member 461 and the second rail member 462 can be forcibly released.

By moving the front rail member 461 and the second rail member 462, the culm can be easily once bitten between the feed chain 41 and the sandwiching rail 460 regardless of the amount of the culm. .. As a result, the culm can be easily taken into the handling chamber without the culm staying near the tip of the pinching rail 460. Further, the sequentially transported grain culms gradually form a bundle behind the tip of the pinching rail 460, and the force with which the bundle of grain culms lifts the third rail member 463 from the front is exerted by the second spring member 464. It can be made larger than the spring force, and the culm can be sequentially conveyed by the feed chain 41. That is, since the grain culm moves smoothly on the feed chain 41, the combine 1 can be threshed smoothly. As described above, even when the amount of the culm is relatively small, the combine 1 can smoothly take the culm into the handling chamber by operating the pinching release device 50.

The work clutch lever 95 is operated to an operation position other than "cutting / threshing", that is, "cutting / threshing" or "cutting / threshing", and the control device 80 receives a signal from the selection position sensor 88. When the operating position of the work clutch lever 95 is recognized based on the above, the control device 80 rotates the arm actuator 503 in the opposite direction. When the arm actuator 503 rotates in the opposite direction, the missing tooth gear 502 rotates in the reverse direction via the gear 505. This eliminates the lifting of the shaft 466 by the arm 501. Alternatively, the gear 505 may idle with respect to the motor shaft 504 and the missing tooth gear 502 may rotate in the reverse direction. Then, the front rail member 461 and the second rail member 462 move in a direction approaching the feed chain 41 according to the spring force of the front spring member 464 and return to their original positions.

1: Combine, 3: Cutting part, 4: Threshing part, 40: Gram guide, 40a: Rotating shaft (rotating fulcrum), 41: Feed chain, 136: Succession transfer device, 401: Operating lever (operating tool), 403 : Guide rod (pressing member), 407: facing part, 408: gap forming part, 409: tip part, 415: torsion spring (another pressing member), Sw1: first switch, Sw2: (cutting part side) first Two switches, Sw4: Second switch (on the threshing section side)

Claims (4)

A cutting section for cutting the culm, a threshing section for threshing, a feed chain for transporting the culm from the cutting section to the threshing section, and a succession transport device arranged inside the feed chain in the width direction of the machine body. A combine that includes a grain guide that can hold down the grain and guide it to the feed chain, and a first switch and a second switch that allow the feed chain to be driven.
The grain guide is rotatable around a rotation fulcrum provided on the cutting portion side.
The grain guide is provided with an operating tool for operating the rotation of the grain guide.
The operating tool can be operated so as to be close to the feed chain to turn on the first switch.
When the first switch and the second switch are on, the feed chain is allowed to be driven.
The grain guide has a pressing member that pushes the grain toward the inheritance transfer device when the operating tool is operated to turn on the first switch while approaching the feed chain. A combine that is characterized by being. The combine according to claim 1, wherein the second switch is arranged on the cutting portion side. The grain culm guide shifts to a state closer to the feed chain by rotating clockwise in a side view.
Claim 1 or claim 2 is characterized in that the first switch is turned on by rotating the operating tool clockwise in a side view while the grain guide is close to the feed chain. The combine described in. The grain guide has a pressing member that pushes the grain toward the feed chain in a state of approaching the feed chain, in addition to the pressing member that pushes the grain toward the succession transfer device.
The pressing member that presses the grain toward the feed chain includes a facing portion that faces the feed chain along the transport direction when it comes into contact with the grain, and a pressing member that is on the upper side of the facing portion and from the facing portion. Claims 1 to claim include a gap forming portion curved toward a rotation fulcrum and a tip portion curved from the facing portion in a direction away from the feed chain on the lower side of the facing portion. The combine according to any one of 3.

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