JP6909103B2 - combine - Google Patents

Description

The present invention relates to a combine.

Patent Document 1 includes a combine provided with a grain culm guide that holds the grain culm during hand-handling work and a guide member (grain culm receiving member in Patent Document 1) that guides the grain culm to the feed chain together with the grain culm guide. Has been described. The guide member has a slope that slopes downward toward the rear, and the slope guides the culm to the feed chain. In addition, the guide member prevents the grain culm placed on the transport surface of the feed chain from falling forward.

The combine is provided with a pressing member that presses the grain culm against the feed chain in the work of threshing the grain culm cut by the cutting section (hereinafter referred to as "non-hand-handling work"). Although the pressing member is located below the slope, it may move upward beyond the lower edge of the slope due to the vibration of the combine harvester and the bulkiness of the culm. When this phenomenon occurs, it is not possible to properly hold the culm against the feed chain, which may cause clogging of the culm and a decrease in transport efficiency.

Japanese Unexamined Patent Publication No. 2014-150781

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a combine capable of preventing the pressing member from moving upward beyond the lower end edge of the slope during non-hand-handling work. ..

The combine according to the present invention includes a feed chain that conveys a grain culm to a threshing section, a grain culm guide that can rotate between a separation position away from the feed chain and an approach position close to the feed chain. A guide member that has a slope that slopes downward toward the rear and guides the culm to the feed chain together with the culm guide, and a guide member that is located below the slope and presses the culm against the feed chain. The lower end portion of the slope is formed to be wider than the upper end portion of the slope. Since the lower end of the slope is formed to be wide, it is possible to prevent the pressing member from moving upward beyond the lower edge of the slope.

It is preferable that the lower end of the slope gradually widens downward. As a result, the width of the slope can be made wider as it approaches the lower end edge of the slope without suddenly changing the width, which is useful in preventing the pressing member from moving upward.

It is preferable that the lower end edge of the slope is inclined rearward toward the outside in the width direction of the machine body. According to such a configuration, when the pressing member to move upward comes into contact with the lower end edge of the slope, the force for moving the slope outward in the width direction of the machine body and / or the pressing member is moved inward in the width direction of the machine body. A force that moves it toward it acts, and as a result, it is possible to more effectively prevent the pressing member from moving upward beyond the lower edge of the slope.

It is preferable that the lower end edge of the slope is inclined downward toward the outside in the width direction of the machine body. According to such a configuration, when the pressing member comes into contact with the lower end edge of the slope to be moved upward, the force for moving the slope outward in the width direction of the machine body and / or the pressing member is moved inward in the width direction of the machine body. A force that moves it toward it acts, and as a result, it is possible to more effectively prevent the pressing member from moving upward beyond the lower edge of the slope.

It is preferable that the lateral portion of the lower end of the slope on the outer side in the width direction of the machine body is inclined downward toward the outer side in the width direction of the machine body. Such a configuration is useful for preventing the pressing member from moving upward through the outside of the guide member in the width direction of the machine body.

Left side view of combine Left side view showing the culm guide in the approaching position and its surrounding structure Left side view showing the culm guide at the separated position and its surrounding structure Top view showing the culm guide in the approaching position and its surrounding structure Left side view showing the culm guide in the middle position and its surrounding structure Perspective view showing the grain culm guide in the middle position and its surrounding structure Top view showing the positional relationship between the guide member and the pressing member Rear view showing the positional relationship between the guide member and the pressing member Left side view showing another embodiment in which the switch arrangement is changed. Schematic diagram showing the transmission structure mechanism of the combine Block diagram showing the configuration of the combine control system

An example of the combine according to the present invention will be described.

[Overall structure of combine harvester]
First, the overall structure of the combine will be briefly described with reference to FIG. FIG. 1 shows the left side surface of the combine 1 of the present embodiment. In the figure, the front-back direction, the left-right direction, and the up-down direction of the combine 1 are indicated by arrows. The left-right direction corresponds to the width direction of the aircraft.

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 threshs 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. The straw after threshing is processed by the straw 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. The operator controls the combine 1 in 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. 10) and a pair of left and right crawler type traveling devices 22. The transmission 21 transmits the power of the engine 8a of the power unit 8 to the crawler type traveling device 22. The crawler type traveling device 22 travels the combine 1 in the front-rear direction and turns the combine 1 in the left-right direction. A cutting section 3 is provided in front of the traveling section 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 vertical transfer device 134 is configured to be movable along the vertical direction, and is located at the lowermost position in the illustrated state. During operation, the optimum transport posture can be maintained by changing the position of the vertical transport device 134 according to the length of the grain culm. The cutting section 3 is configured to be able to move up and down by a hydraulic cylinder 35 connected to the front end portion of the machine frame 20.

The threshing section 4 is provided behind the cutting section 3. The threshing unit 4 includes a feed chain 41 and a handling cylinder 42. The feed chain 41 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 from the threshing section 4 to the straw discharge processing section 7. The handling cylinder 42 threshes the culm carried by the feed chain 41.

The side cover 43 covers the feed chain 41 from the left side, which is the outer side of the combine 1 in the width direction of the machine body. The straw holding base cover 44 provided above the side cover 43 also covers the handling body 42 and the like from the outside in the width direction of the machine body. An emergency stop switch Sw0 is installed above the straw presser cover 44. The emergency stop switch Sw0 is a pressing type switch that can be turned on / off by a pressing operation of an operator. When the emergency stop switch Sw0 is switched on, the drive of the engine 8a is forcibly stopped, and the drive of each part including the feed chain 41 is stopped.

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 supplies sorting wind to the rocking sorting device 51, and together with the rocking sorting device 51, sorts threshing into grains, straw waste, and the like. The grains sorted by the rocking sorting device 51 and the wind sorting device 52 are collected by a grain collecting mechanism (not shown) and transported to the storage unit 6. The straw debris and the like sorted by the rocking sorting device 51 and the wind sorting device 52 are discharged to the outside of the machine via the straw discharging processing unit 7.

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 is configured to be rotatable in the vertical and horizontal directions around the rear end portion (base end portion on the upstream side of grain transport) and the front end portion (tip portion on the downstream side of grain transport). The grains stored in the grain tank 61 can be discharged to any place.

The straw discharge processing unit 7 is provided below the control unit 9 and behind the threshing unit 4. The straw discharge processing unit 7 cuts and discharges the grain culm conveyed by 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 that generates rotational power. The rotational power generated by the engine 8a is transmitted to the cutting section 3, the threshing section 4, the sorting section 5, and the like.

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 including a steering wheel 92. 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 operator can operate the combine 1 by operating a plurality of operating tools such as the steering wheel 92 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 it to the feed chain 41. The grain guide 40 is provided on the left side of the combine 1. The combine 1 of the present embodiment further includes a guide member 45 and a pressing member 48 (see FIGS. 2 to 6). The guide member 45 guides the culm to the feed chain 41 together with the culm guide 40. The guide member 45 is arranged on the left side of the auxiliary transport device 135, which is outside in the width direction of the machine body. The pressing member 48 presses the grain culm against the feed chain 41 during non-hand-handling work. That is, the grain guide 40 and the guide member 45 are members that act on the grain during the hand-handling work (press the grain to the feed chain 41), and the pressing member 48 acts on the grain during the non-hand-handling work. It is a member that acts (presses the grain culm against the feed chain 41).

[Grave culm guide]
Next, the grain culm guide will be described with reference to FIGS. 2 to 6. The grain guide 40 includes a first switch Sw1 that allows the feed chain 41 to be driven, an operation lever 401 as an operating tool for operating the grain guide 40, and a frame plate 402 that rotatably supports the operation lever 401. The guide rod 403 is provided as a pressing member for pressing the grain culm against the feed chain 41. The on / off switching of the first switch Sw1 is performed by operating the operating lever 401. The operation lever 401 serves as a handle for operating the rotation of the grain culm guide 40.

The grain guide 40 rotates with the rotation shaft 40a as a fulcrum. The rotating shaft 40a is sandwiched between the frame plate 402 and the back plate 404 (front back plate) as shown in FIG. 4, and is integrally fixed to these. The rotating shaft 40a is inserted into the tubular member 405 so as to be relatively rotatable. The tubular member 405 is interposed between the frame plate 402 and the back plate 404, and is fixed to the frame 114 of the cutting portion 3 via the bracket 406. With such a configuration, the culm guide 40 is supported so as to be rotatable relative to the frame 114.

The guide rod 403 is formed by bending a rod having a circular cross section. The guide rod 403 is integrally fixed to the frame plate 402. As shown in FIG. 2, the guide rod 403 includes a facing portion 403a that faces the transport surface of the feed chain 41 when the culm guide 40 is in an approaching position close to the feed chain 41. The guide rod 403 is further located in front of the facing portion 403a and is located behind the facing portion 403a and the gap forming portion 403b curved from the facing portion 403a toward the rotation shaft 40a, in a direction away from the feed chain 41. It has a rear end portion 403c curved from the facing portion 403a.

The grain guide 40 is configured to be rotatable between a separated position separated from the feed chain 41 and an approached position close to the feed chain 41. The arrow R indicates the rotation direction of the culm guide 40. The grain guide 40 at the separated position is in a posture of standing upward from the rotation shaft 40a as shown in FIG. 3, and the guide rod 403 is directed in the vertical direction. On the other hand, the grain guide 40 in the approaching position is in a posture of lying backward from the rotation shaft 40a as shown in FIG. 2, and the guide rod 403 is arranged below the rotation shaft 40a. Hereinafter, the state in which the grain culm guide 40 is in the approaching position is referred to as an "approaching state", and the state in which the grain culm guide 40 is in the separating position is referred to as a "separating state".

In the present embodiment, the rotation shaft 40a is provided in the front portion of the grain culm guide 40, and the grain culm guide 40 is rotated clockwise in the left side view shown in FIGS. Approach against. However, the present invention is not limited to this, and the rotation shaft 40a is provided at the rear portion of the grain culm guide 40 and rotates counterclockwise when viewed from the left side so that the grain culm guide 40 approaches the feed chain 41. It does not matter if it is configured. Such a configuration is disclosed in, for example, the above-mentioned Patent Document 1.

When the grain guide 40 is in the approaching position, the facing portion 403a is arranged above the feed chain 41, and the facing portion 403a presses the grain culm against the feed chain 41. Further, in the approaching state, a gap is formed between the gap forming portion 403b forming the front portion of the guide rod 403 and the feed chain 41, so that the transport resistance of the grain culm waiting in front is reduced and the grain culm is reduced. The transport posture of the rod can be stabilized. Further, since a gap is formed between the rear end portion 403c forming the rear portion of the guide rod 403 and the feed chain 41, the grain culm guide 40 does not interfere with the transportation of the grain culm and stabilizes the posture of the grain culm. Then, the grain culm can be sent to the handling cylinder 42 by the feed chain 41.

In this embodiment, the culm guide 40 includes an auxiliary rod 415. As shown in FIG. 4, the auxiliary rod 415 is arranged on the inside of the guide rod 403 in the width direction of the machine body. The auxiliary rod 415 is formed by bending a rod having a circular cross section, and is integrally fixed to the back plate 416 (rear back plate). The back plate 416 is attached to the frame plate 402 via a pair of connecting shafts 417. The auxiliary rod 415 extends substantially parallel to the guide rod 403 and presses the culm together with the guide rod 403 against the feed chain 41. By simultaneously pressing both the stock root side and the tip side of the grain culm with the guide rod 403 and the auxiliary rod 415, it is possible to prevent the grain culm from bending and further stabilize the transport posture of the grain culm.

A tension spring 40b as an urging member is engaged with the grain guide 40. One end of the tension spring 40b is engaged with the first engagement pin 407 as the first engagement portion, and the other end of the tension spring 40b is engaged with the engagement jig 115 fixed to the frame 114. The first engaging pin 407 is provided in the vicinity of the rotating shaft 40a. The first engaging pin 407 protrudes from the frame plate 402 toward the right side, which is inside in the width direction of the machine body, but may protrude toward the opposite side (left side). The first engaging pin 407 of the present embodiment is located above the rotating shaft 40a and slightly behind the rotating shaft 40a in the approaching state shown in FIG. 2, and in the separated state shown in FIG. 3, the rotating shaft 40a It is located forward and horizontal to the axis of rotation 40a.

The tension spring 40b engaged with the first engagement pin 407 pulls the culm guide 40 so as to pull it away from the feed chain 41, and the operator is not operating the culm guide 40, that is, the tension by the tension spring 40b. The culm guide 40 is held at a separated position when no external force other than the force (urging force) is acting. That is, the combine 1 is provided with a tension spring 40b that urges the grain culm guide 40 toward the separation position, and the grain culm guide 40 at the approaching position is configured to move to the separation position by the action of the tension spring 40b. Has been done. Therefore, at the time of manual handling work, it is possible to save the labor of the worker moving the grain culm guide 40 to the separated position, and the work efficiency is improved.

The tension spring 40b can also engage with the second engaging pin 408 as the second engaging portion. The second engaging pin 408 is provided closer to the rotation shaft 40a than the first engaging pin 407. The second engaging pin 408 projects from the frame plate 402 toward the left side, which is the outer side in the width direction of the machine body, but may project toward the opposite side (right side). The second engaging pin 408 of the present embodiment is located behind the rotating shaft 40a and horizontally with respect to the rotating shaft 40a in the approaching state shown in FIG. 2, and in the separated state shown in FIG. 3, the rotating shaft 40a Located above.

Although the tension spring 40b engaged with the second engaging pin 408 pulls the culm guide 40 forward, the second engaging pin 408 is positioned horizontally behind the rotation shaft 40a in the approaching state shown in FIG. Therefore, the grain culm guide 40 in the approaching position is not rotated toward the separation position, and the grain culm guide 40 in the approaching position is held in the approaching position as it is. As described above, in the combine 1 of the present embodiment, in the state where the tension spring 40b is engaged with the first engagement pin 407, the grain guide 40 at the approaching position moves to the separation position by the action of the tension spring 40b. In a state where the tension spring 40b is engaged with the second engaging pin 408, the grain guide 40 at the approaching position is held at the approaching position.

The tension spring 40b can be selectively engaged with the first engaging pin 407 and the second engaging pin 408 provided on the grain guide 40. The operator can arbitrarily select whether to engage the tension spring 40b with the first engaging pin 407 or the second engaging pin 408 depending on the situation. When the combine 1 is used, by engaging the tension spring 40b with the first engaging pin 407, the grain culm guide 40 is held exclusively at the separated position, so that the manual handling work is efficient as described above. You can do it well. On the other hand, in a situation where it may be inconvenient if the culm guide 40 is in a separated position, for example, when a dust cover is put on the cutting portion 3 when the combine is stored, the tension spring 40b is engaged with the second engaging pin 408. Therefore, the grain guide 40 can be held in an approaching position.

As shown in FIGS. A fixing member 47 capable of fixing the grain guide 40 is provided. According to such a configuration, by fixing the grain culm guide 40 in the middle position without switching the engaging portion of the tension spring 40b, inconvenience may occur if the grain culm guide 40 is in the separated position as described above. Can handle the situation appropriately. Moreover, since the grain culm guide 40 is fixed at an intermediate position instead of the approaching position, the grain culm guide 40 hinders the transportation of the grain culm even if the non-hand-handling work is performed with the fixing member 47 acting. Therefore, even if the operator forgets to remove the fixing member 47, no inconvenience occurs.

In the present embodiment, the grain culm guide 40 at the intermediate position is in a posture of lying backward from the rotation shaft 40a as shown in FIG. 5, and the guide rod 403 is arranged at the same height as the rotation shaft 40a. Further, the first engaging pin 407 to which the tension spring 40b is engaged is located above the rotation shaft 40a, and although a tensile force that pulls the grain culm guide 40 toward the separation position acts, the grain culm The movement of the guide 40 is hindered by the fixing member 47. The intermediate position is not limited to the position shown in the drawing, and may be a position where the grain guide 40 is appropriately separated from the feed chain 41.

The fixing member 47 is configured to be rotatable between a fixed position (see FIG. 6) for fixing the grain culm guide 40 in the middle position and a non-fixed position (see FIG. 3) that does not hinder the movement of the grain culm guide 40. Has been done. As shown in FIG. 6, the fixing member 47 has a rotation shaft 47a which is a fulcrum of rotation and a hook 47b which can be engaged with the grain guide 40. The rotation shaft 47a is supported by a bracket 418 fixed to the frame 114 so as to be relatively rotatable. That is, the fixing member 47 is supported so as to be rotatable relative to the frame 114. The hook 47b engages with the rotary cylinder 413 (details of the rotary cylinder 413 will be described later) included in the grain culm guide 40, but may be engaged with other parts of the grain culm guide 40. In FIG. 6, for convenience of explanation, the back plate 404 is transparently drawn.

In the state of FIG. 6, the fixing member 47 is in the fixed position. When the operator rotates the grain culm guide 40 from the separated position to the approaching position, the rotary cylinder 413 also rotates together with the grain culm guide 40 along with the rotation operation. The hook 47b of the fixing member 47 can be engaged with the rotary cylinder 413 at a predetermined position (intermediate position) between the distance position and the approach position of the grain guide 40. Then, by engaging the hook 47b with the grain culm guide 40 (rotary cylinder 413), the movement of the grain culm guide 40 to a separated position or an approaching position is hindered, and the grain culm guide 40 is fixed at an intermediate position. .. When the fixing member 47 is rotated backward to disengage the hook 47b, the fixing member 47 is displaced to the non-fixed position, and the movement of the grain guide 40 to the separated position or the approaching position is not hindered. Become. The work of fixing the grain culm guide 40 at an intermediate position can be easily performed because it is only necessary to rotate the fixing member 47 in this way. The fixing member 47 is formed of a plate material, but is not limited thereto.

[Guide member and pressing member]
Next, the guide member and the pressing member will be described. As shown in FIG. 3, the guide member 45 has a pedestal 45a supported by the frame 114 and a slope 45b inclined downward toward the rear. The pedestal 45a is supported by the frame 114 via a bracket 418. The pedestal 45a is arranged behind the rotation shaft 40a. The slope 45b is located behind the pedestal 45a and extends along the transport direction of the feed chain 41 in a plan view as shown in FIG. The lower end (rear tip) 45c of the slope 45b is located above the feed chain 41.

The guide member 45 guides the culm to the feed chain 41 by the slope 45b. Further, the slope 45b supports the grain culm so that the grain culm placed on the transport surface of the feed chain 41 does not fall forward. As shown in FIG. 3, the slope 45b extends in a direction substantially perpendicular to or slightly inclined with respect to the transport surface at the front portion of the feed chain 41 in the left side view, in other words, on the transport surface of the feed chain 41. On the other hand, there is a positional relationship that forms a substantially V shape. By providing the guide member 45, the grain culm can be supported during the hand-handling operation, and the grain culm can be guided to the feed chain 41 together with the grain culm guide 40. The guided culm is conveyed by the feed chain 41 over the pressing member 48. That is, in the hand-handling work, the pressing member 48 does not exert the action of pressing the grain culm against the feed chain 41.

In the present embodiment, an extension member 451 is attached above the pedestal 45a to extend the slope 45b upward so that more culms can be supported. However, a configuration that does not include such an extension member 451 may be used. Alternatively, the guide member 45 itself can be shaped like this. The guide member 45 is formed by bending a plate material, but the guide member 45 is not limited to this.

The pressing member 48 presses the grain culm conveyed by the conveying device 34 of the cutting unit 3 toward the feed chain 41 during the non-hand-handling operation. The pressing member 48 is interposed between the facing portion 48a facing the transport surface of the feed chain 41, the supporting portion 48b supported so as to be relatively rotatable with respect to the bracket 49, and the facing portion 48a and the supporting portion 48b. It includes a connecting portion 48c that connects the two. The support portion 48b extends along the left-right direction. The connecting portion 48c is curved and extends from the facing portion 48a toward the supporting portion 48b. The pressing member 48 is formed by bending a bar having a circular cross section, but the present invention is not limited to this, and the pressing member 48 may be formed of, for example, a plate material.

The support portion 48b is inserted into the tubular portion 491 of the bracket 49 fixed to the frame 114 so as to be relatively rotatable. With this configuration, the pressing member 48 is attached to the frame 114 via the bracket 49 and is rotatably supported relative to the frame 114. The facing portion 48a approaches the transport surface of the feed chain 41 due to the weight of the pressing member 48. Therefore, the pressing member 48 during the non-hand-handling operation moves up and down according to the bulk of the supplied grain culm. This vertical movement refers to the vertical movement of the facing portion 48a and the connecting portion 48c due to rotation with the support portion 48b as a fulcrum. The upward movement of the pressing member 48, which will be described later, is synonymous with this.

The pressing member 48 is located below the slope 45b. A rear portion of the connecting portion 48c is arranged directly below the lower end edge 45e of the slope 45b. During non-hand-handling work, the pressing member 48 moves upward beyond the lower end edge 45e due to the vibration of the combine 1 and the bulkiness of the grain culm, and rises to the height as shown by the chain line in FIG. Can be considered. When the pressing member 48 is present at such a position, the grain culm cannot be properly pressed against the feed chain 41, which may cause clogging of the grain culm or a decrease in transport efficiency.

Therefore, as shown in FIGS. 7 and 8, in this combine 1, the lower end portion 45c of the slope 45b is formed wider than the upper end portion 45d of the slope 45b. This prevents the pressing member 48 from moving upward beyond the lower end edge 45e of the slope 45b, and the pressing member 48 can appropriately press the culm during non-hand-handling work. Rather than forming the slope 45b as wide as a whole, making the lower end 45c partially wide in this way means that the slope 45b and the approaching culm guide 40 arranged outside in the width direction of the machine body are used. It is convenient to secure the interval with.

In the present embodiment, the slope 45b extends from the upper end portion 45d toward the lower end portion 45c with a constant width (width Wd), and is partially widened at the lower end portion 45c. The width Wc of the lower end portion 45c is larger than the width Wd of the upper end portion 45d. The width Wc and the width Wd are measured along the left-right direction, which is the width direction of the machine body, respectively. As shown in FIG. 7, the lower end portion 45c is located at a position overlapping the pressing member 48 in a plan view. The lower end portion 45c gradually becomes wider toward the bottom, and becomes wider as it approaches the lower end edge 45e. In the guide member 45, a bar 45f having a circular cross section is attached to the lower end edge 45e in order to prevent the guide member 45 from being caught by the culm, but this may be omitted.

In the non-hand-handling work, since the grain culm is transported from the inside to the outside in the machine width direction by the transport device 34, the pressing member 48 tends to move upward through the outside of the guide member 45 in the machine width direction. be. Therefore, it is preferable that the lower end portion 45c projects at least outward in the width direction of the machine body. In the present embodiment, the lower end portion 45c is formed so as not to project inward in the width direction of the machine body but to project only to the left side which is outside in the width direction of the machine body. As shown in FIG. 8, the lateral portion 45s on the lower end portion 45c on the outer side in the width direction of the machine body is inclined downward toward the outer side in the width direction of the machine body. The shape of the side portion 45s is useful for preventing the pressing member 48 from moving upward through the outside of the guide member 45 in the width direction of the machine body.

As shown in FIG. 7, the lower end edge 45e is inclined rearward toward the outside in the width direction of the machine body. Further, as shown in FIG. 8, the lower end edge 45e is inclined downward toward the outside in the width direction of the machine body. Regardless of the configuration, when the pressing member 48 to move upward comes into contact with the lower end edge 45e, the force for moving the slope 45b outward in the body width direction and / or the pressing member 48 in the body width direction. A force that moves inward acts, and as a result, the pressing member 48 can be more effectively prevented from moving upward beyond the lower end edge 45e of the slope 45b.

As described above, in this combine 1, since the lower end edge 45e is inclined downward toward the outside in the width direction of the machine body, when the pressing member 48 trying to move upward comes into contact with the lower end edge 45e, the slope is reached. A force that moves 45b downward acts. At this time, if the slope 45b moves significantly downward, the lower end edge 45e may be caught on the grain culm pushed by the pressing member 48. Therefore, in the present embodiment, as shown in FIG. 8, the pressing member 48 is arranged outside the width center position of the slope 45b in the width direction of the machine body so that such an inconvenience does not occur.

[Hand-held safety device]
Next, a hand-held safety device that improves safety during hand-handling work will be described. The combine 1 includes, in addition to the first switch Sw1 described above, a second switch Sw2 that allows the feed chain 41 to be driven. The first switch Sw1 can be switched on / off according to the operation of the operation lever 401. The second switch Sw2 is switched on / off by a pressing operation of the operator. The second switch Sw2 is always off and is on only while the operator is pressing it. The feed chain 41 is driven when both the first switch Sw1 and the second switch Sw2 are turned on. As a result, it is possible to prevent the feed chain 41 from being driven against the intention of the operator and improve safety.

The first switch Sw1 is switched on and off according to the operation of the operation lever 401. As shown in FIG. 6, 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 formed on the bent portion 40f. It is attached. The button of the first switch Sw1 that is switched on by the pressing operation penetrates the bent portion 40f and projects downward.

The operation lever 401 is supported by the frame plate 402 so as to be relatively rotatable via the operation center shaft 40c. The operating lever 401 is connected to the rotary cylinder 413 via a link mechanism 411. A pivot 40d is inserted into the rotary cylinder 413 (see FIG. 4). The pivot 40d is sandwiched between the frame plate 402 and the back plate 404, and is integrally fixed to them. A pressing plate 414 is fixed to the outer peripheral surface of the rotary cylinder 413. When the operating lever 401 is rotated relative to the frame plate 402, the rotary cylinder 413 also rotates relative to the frame plate 402 via the link mechanism 411, and the pressing plate 414 rotates about the pivot 40d accordingly.

When the operating lever 401 is rotated clockwise with respect to the frame plate 402 from the approaching state shown in FIG. 2, the operating lever 401 rotates relative to the frame plate 402, and the corresponding rotation of the pressing plate 414 causes the first switch Sw1. Button is pressed, and the first switch Sw1 is switched on. In the state where the first switch Sw1 is switched on, the operating lever 401 is urged counterclockwise in the left side view by the torsion coil spring 410. The operating lever 401 rotated relative to the frame plate 402 can be returned to its original position by the urging force of the torsion coil spring 410. The urging force of the torsion coil spring 410 is such that the operating lever 401 does not rotate around the operating central shaft 40c when the operating lever 401 is operated to move the grain guide 40 from the separated position to the approaching position. Will be done. That is, the operation lever 401 moves the operation center axis 40c by applying a force stronger than the force for moving the grain guide 40 to the approach position to the operation lever 401 after the grain guide 40 is set to the approach position. Rotate to the center.

With such a configuration, the operator can switch the first switch Sw1 on and off. That is, the first switch Sw1 can be switched on by operating the operating lever 401 to arrange the grain guide 40 at an approaching position and then further operating the operating lever 401 toward the feed chain 41. Then, by operating the operating lever 401 so as to be separated from the feed chain 41, the first switch Sw1 can be switched off.

In the present embodiment, the first switch Sw1 is provided on the grain guide 40, but the present invention is not limited to this, and the first switch is supported by a rigid body in the cutting section 3, for example, a frame member of the cutting section 3 such as a frame 114. It may be configured.

The second switch Sw2 is arranged in front of the grain guide 40. The second switch Sw2 is supported by the frame 114. The operator drives the feed chain 41 by pushing down the operation lever 401 with the right hand to keep the first switch Sw1 on, and pushing the second switch Sw2 with the left hand to keep the second switch Sw2 on. can.

The second switch Sw2 may be arranged behind the grain guide 40, and may be installed on, for example, the straw presser cover 44. In that case, the operator can drive the feed chain 41 by switching the first switch Sw1 and the second switch Sw2 on by pressing the second switch Sw2 with the right hand while operating the operation lever 401 with the left hand. Further, if the second switch Sw2 is arranged both in front of and behind the grain guide 40 so that it can be selectively used, the operator can handle either the left or right hand.

By the way, if the grain culm is excessively supplied during the hand-handling work, the grain culm guide 40 cannot be lowered completely due to the bulkiness of the grain culm, and the grain culm guide 40 does not sufficiently approach the feed chain 41. Even in such a state, the first switch Sw1 can be switched on, so that the feed chain 41 can be driven to perform the hand-handling work, but there is a problem that the culm is not properly taken into the threshing section 4. May come. Therefore, in order to avoid the manual handling work in such an inappropriate state, the position (rotation amount) of the grain culm guide 40 is detected in this combine 1, and a predetermined control is performed based on the detection result. Will be done.

As shown in FIG. 6, the grain culm guide 40 is provided with a rotation angle sensor 89 that detects the position (rotation amount) of the grain culm guide 40, that is, the rotation angle of the grain culm guide 40. The rotation angle sensor 89 is composed of, for example, a potentiometer. The rotation angle sensor 89 has a lever 89a that is rotatably supported. The lever 89a is arranged behind the rotation shaft 40a. The lever 89a is urged toward the front, and the position where the lever 89a comes into contact with the tubular member 405 is the limit of the rotation range in front of the lever 89a. When the grain culm guide 40 is rotated from the separated position to the approaching position, the rotary cylinder 413 comes into contact with the lever 89a in the process, and the lever 89a rotates to a position corresponding to the rotation angle of the grain culm guide 40. The position (rotation amount) of the grain culm guide 40 is detected based on the rotation angle of the lever 89a.

When both the first switch Sw1 and the second switch Sw2 are turned on, the position of the grain guide 40 is higher than the predetermined position, that is, the rotation amount of the grain guide 40 is smaller than the predetermined rotation amount. In this case, predetermined control such as output of an alarm and stop or deceleration of the feed chain 41 is performed. As a result, the operator is informed that the culm guide 40 is not sufficiently close to the feed chain 41, and the manual handling work in an inappropriate state can be avoided.

In the present embodiment, an example in which the operator manually operates the grain culm guide 40 has been shown, but the present invention is not limited to this, and the grain culm guide 40 may be driven by a motor or the like. However, even with such a structure, it is preferable from the viewpoint of safety that the operator is operated by using both hands. Therefore, for example, it is conceivable to arrange the third switch Sw3 as shown in FIG. The operator switches these on by pressing the third switch Sw3 with the right hand while pressing the second switch Sw2 with the left hand. In this case, the feed chain 41 is driven when the second switch Sw2 and the third switch Sw3 are switched on.

[Worker's behavior during hand-handling work]
Next, the operation of the operator during the hand-handling work will be briefly described. The hand-handling operation is started in a state where the combine 1 is stopped, that is, a state in which the crawler type traveling device 22 is stopped and the feed chain 41 is stopped.

The worker who performs the hand-handling work moves to a position where the grain culm guide 40 can be operated (hereinafter referred to as "hand-handling work position") on the left side of the combine 1, and puts the cut culm in a predetermined place. Place. This predetermined location refers to a location where the culm can be held by the guide rod 403 when the culm guide 40 is rotated downward, and is a region formed by the slope 45b and the transport surface of the feed chain 41. Is. In the present embodiment, since the grain culm guide 40 is in a separated position in advance by the action of the tension spring 40b, it is not necessary to rotate the grain culm guide 40 upward before placing the grain culm, and the work efficiency is improved. ..

When the cutting section 3 is raised, the predetermined place described above becomes narrow and it becomes difficult to place the grain culm. Therefore, it is preferable that the hand-handling work is performed with the cutting section 3 lowered. The raising and lowering of the cutting unit 3 is usually configured to be operable by an operating tool provided on the control unit 9. Therefore, if the operator forgets to lower the cutting unit 3 and moves to the hand-handling work position with the cutting unit 3 raised, the operator reciprocates from there to and from the control unit 9. It is necessary to lower the cutting unit 3, which complicates the work.

Therefore, in order to eliminate such inconvenience, an operating tool for raising and lowering the cutting unit 3 may be arranged around the hand-handling work position. For example, as in the present embodiment, it is conceivable to install a switch 36 capable of operating the raising and lowering of the cutting unit 3 on the straw holding base cover 44. The switch 36 may be installed not only on the straw holding base cover 44 but also on the side cover 43 and other places. The switch 36 may be capable of operating only the lowering of the cutting unit 3. Alternatively, the cutting unit 3 may be configured to automatically lower when both the first switch Sw1 and the second switch Sw2 are switched on.

After placing the culm in place, the operator rotates the culm guide 40 so as to approach the feed chain 41 to hold the culm. Then, from that state, the operation lever 401 is rotated toward the feed chain 41 to turn on the first switch Sw1. The operation of switching the first switch Sw1 on is an operation of grasping the operation lever 401 and pushing down the grain guide 40 toward the feed chain 41. Then, the operator pushes the second switch Sw2 while pushing down the operation lever 401. As a result, both the first switch Sw1 and the second switch Sw2 are switched on, and the feed chain 41 is driven to perform the hand-handling work.

[Power transmission mechanism]
Next, the power transmission mechanism of the combine 1 will be described with reference to FIG. 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 belt wound around the output pulley 181 and is transmitted from the transmission 21 to the traveling unit output pulley 141. The continuously variable transmission 23 included in the transmission 21 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 device 22. With this configuration, the transmission 21 can change the driving state of the crawler type traveling device 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 of the power transmission first shaft 183 is housed in the power transmission case 185.

The rotational power transmitted to the traveling unit output pulley 141 is transmitted 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, rotational power is also transmitted from the threshing section output pulley 143 to the cutting section second input pulley 144. 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. 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 bevel gear 148 is fixed in the middle of the first cutting shaft 147, and rotational power is transmitted to the cutting portion 3 via the bevel gear 148.

During non-hand-handling 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. 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. The transmission device for the threshing section 186 has a power transmission second shaft 191 and a threshing section output shaft 192.

The feed chain transmission device 187 includes a feed chain transmission case 201, a variable input shaft 194 penetrating the feed chain transmission case 201, and a feed chain change provided outside the feed chain transmission case 201 in the body width direction. It has a belt-type stepless changer 208, which is a mechanism, and a variable output shaft 260 that outputs the power output from the belt-type stepless changer 208. The belt-type continuously variable transmission 208 can synchronize the transfer speed of the feed chain 41 and the cutting speed of the cutting unit 3 with the traveling speed of the combine 1.

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 197 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 197. The threshing section output shaft 192 is a shaft for transmitting rotational power to a handling cylinder and a straw disposal device (not shown in FIG. 10).

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 variable input shaft 194, the power transmission second shaft 191 is transferred to the variable input shaft 194. Rotational power is transmitted. At the other end of the variable input shaft 194, an input pulley 220 of the belt type stepless variable machine 208 is provided. 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 variable output shaft 260, and the rotational power is output from the variable output shaft 260 toward the feed chain 41.

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 is rotated in one direction (forward direction), the diameter of the belt 290 wound around the input pulley 220 is expanded, the groove width of the output pulley 250 is widened, and the belt is wound around the output pulley 250. The diameter of the belt 290 becomes smaller. As a result, the variation ratio of the belt-type stepless changer 208 changes to the increasing side, and the transport speed of the feed chain 41 changes to the increasing side. On the other hand, when the shaft of the motor 310 is rotated in the other direction (reverse direction), the diameter of the belt 290 wound around the input pulley 220 is reduced, the groove width of the output pulley 250 is narrowed, and the belt is wound around the output pulley 250. The diameter of the belt 290 to be turned becomes large. As a result, the variation ratio of the belt-type stepless changer 208 changes to the decreasing side, and the transport speed of the feed chain 41 changes to the decreasing side.

A power transmission sprocket 195 is provided at the end of the variable output shaft 260, and the rotational power is transferred to the power transmission sprocket 196 which is fitted in the variable input shaft 194 so as to be relatively rotatable via the power transmission sprocket 195. Is 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, 196 and the power transmission mechanism 198 are housed in the feed chain transmission case 201. The feed chain output shaft 199 is provided with a feed chain rotating sprocket 205, and the feed chain 41 can be driven by the rotation of the feed chain rotating sprocket 205.

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. The 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 of the solenoid valve 206 is excited, the hydraulic actuator 204 is extended, and when the excitation of the solenoid is released, the hydraulic actuator 204 is shortened. By extending the hydraulic actuator 204, the clutch is non-rotatably connected to the gear and switched to the connected state, and by shortening the hydraulic actuator 204, the clutch is separated from the gear and switched to the disengaged 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 drive of the engine 8a is also stopped. The combine 1 can extend the hydraulic actuator 204 to drive the feed chain stop mechanism 193 when the power supply of the control device 80 is cut off (when the drive of the engine 8a is stopped). 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. Instead of the hydraulic actuator, the feed chain stop mechanism 193 may be driven by an electric actuator.

[Control system]
Next, the control system of the combine 1 will be briefly described with reference to FIG. As shown in FIG. 11, 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 can control the feed chain stop mechanism 193 by transmitting a control signal to the solenoid valve 206.

The control device 80 is connected to an emergency stop switch Sw0 capable of transmitting an input signal to the control device 80. As shown in FIG. 10, the control device 80 is connected to the engine 8a. When the emergency stop switch Sw0 is turned on, the control device 80 forcibly stops the drive of the engine 8a and stops the drive of the feed chain 41.

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 control device 80 is a feed chain stop mechanism 193 when both the first switch Sw1 and the second switch Sw2 are turned on at the same time after the feed chain stop mechanism 193 is connected and the feed chain 41 is stopped. Drives the feed chain 41 in the disconnected state. The control device 80 can grasp the driving state of the crawler type traveling device 22, and the operation of the first switch Sw1 is effective only when the crawler type traveling device 22 is stopped.

The control device 80 is connected to the rotation angle sensor 89, and can grasp the position (rotation amount) of the grain guide 40. When the control device 80 drives the feed chain 41 during the hand-handling work, when the position of the grain culm guide 40 is higher than the predetermined position, that is, the rotation amount of the grain culm guide 40 is smaller than the predetermined rotation amount. In this case, a signal is sent to the alarm device 270 to issue an alarm, a signal is sent to the electromagnetic valve 206 to stop the feed chain 41, or the rotation direction and rotation angle of the motor 310 are controlled to control the feed chain 41. You can slow down.

The present invention is not limited to the above-described embodiment, and various improvements and changes can be made without departing from the spirit of the present invention. In the above-described embodiment, the grain guide 40 at the approaching position is configured to move to the separating position by the action of the urging member, but the present invention is not limited to this.

1 Combine 2 Traveling part 3 Cutting part 4 Threshing part 40 Grain culm guide 40a Rotating shaft 40b Tension spring (an example of urging member)
41 Feed chain 45 Guide member 45a Pedestal 45b Slope 45c Lower end 45d Upper end 45e Lower edge 45s Side 47 Fixing member 47a Rotating shaft 47b Hook 48 Pressing member 401 Operating lever 402 Frame plate 403 Guide rod 407 First engaging pin ( First engaging part)
408 Second engagement pin (second engagement part)
451 Extension member Sw1 First switch Sw2 Second switch

Claims (5)

A feed chain that transports the culm to the threshing department,
A culm guide that can rotate between a separation position away from the feed chain and an approach position close to the feed chain.
A guide member having a slope inclined downward toward the rear and guiding the culm to the feed chain together with the culm guide.
A pressing member located below the slope and pressing the culm against the feed chain is provided.
A combine in which the lower end portion of the slope is formed wider than the upper end portion of the slope. The combine according to claim 1, wherein the lower end portion of the slope gradually widens downward. The combine according to claim 1 or 2, wherein the lower end edge of the slope is inclined rearward and downward toward the outside in the width direction of the machine body. Claims 1 to 1, wherein the pressing member is located below a portion of the lower end portion of the slope formed to be wider than the upper end portion of the slope and protruding in the width direction from the upper end portion. The combine according to any one of 3. The combine according to any one of claims 1 to 4, wherein the lateral portion of the lower end of the slope on the outer side in the width direction of the machine body is inclined downward toward the outer side in the width direction of the machine body.

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