JP2019041616A - Combine harvester - Google Patents

Abstract

To provide a combine harvester which can increase work efficiency by omitting a labor of operation of a grain culm guide in hand-paddling work.SOLUTION: A combine harvester includes: a feed chain 41 for conveying grain culm to a threshing part; a grain culm guide 40 rotatable between a separation position separated from the feed chain 41, and an approach position approaching to the feed chain 41; and a tension spring 40b as an energization member for energizing the grain culm guide 40 toward the separation position. The grain culm guide 40 in the approach position moves to the separation position due to the action of the tension spring 40b.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a combine.

  Patent Document 1 describes a combine having a grain guide for holding the grain at the time of handling. The grain guide is configured to be pivotable between a separated position spaced apart from the feed chain and an approximated position closer to the feed chain. In the combine described in the document, the grain guide is biased downward by a spring, and the grain guide when not in use is held in the approach position. Therefore, at the time of manual handling operation, it is necessary for the operator to manually move the grain guide to the separated position before placing the grain on the transport surface of the feed chain.

JP, 2014-150781, A

  The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a combine which can improve the working efficiency by eliminating the time and effort of operating the grain guide at the time of handling work.

  A combine according to the present invention comprises a feed chain for conveying a grain scale to a threshing part, a grain scale guide rotatable between a separated position separated from the feed chain and an approach position approaching the feed chain. And a biasing member for biasing the grain guide toward the separated position, wherein the grain guide in the approaching position is configured to move to the separated position by the action of the biasing member. According to this configuration, it is possible to improve the work efficiency by eliminating the time and effort to move the grain guide to the separated position at the time of the manual handling operation.

  The biasing member is alternatively engageable with a first engaging portion and a second engaging portion provided on the grain stem guide, and the biasing member is engaged with the first engaging portion. In the engaged state, the grain guide in the approaching position is moved to the separated position by the action of the biasing member, and in the state in which the biasing member is engaged with the second engaging portion, the approaching position One of the grain guide may be configured to be held in the approach position. In such a configuration, by switching the engagement position of the biasing member, the grain stem guide can be held at the approach position as required. Therefore, it is possible to appropriately cope with a situation where inconvenience occurs when the grain stem guide is in the separated position, such as when the dust removal cover is put on the reaper when the combine is stored.

  It may be provided with a fixing member capable of fixing the grain guide at an intermediate position between the separated position and the approaching position while preventing the movement of the grain guide to the separated position by the action of the biasing member. According to such a configuration, since the grain stem guide can be fixed at an intermediate position, it is possible to appropriately cope with a situation where inconvenience occurs when the grain stem guide is at the separated position. In addition, the normal threshing work (work to thresh the grain cut by the reaper while keeping the fixing member in operation by fixing the grain guide at the middle position instead of the approaching position). Even if it is performed, the grain guide does not inhibit the conveyance of the grain.

  It is preferable that the fixing member is configured to be rotatable between a fixed position at which the grain guide is fixed at an intermediate position and a non-fixed position that does not prevent the movement of the grain guide to the separated position. . Thereby, the operation | work which fixes a grain stem guide in the middle position can be performed simply.

Left side view of combine Left side view showing the grain guide in the approach position and its surrounding structure Left side view showing the grain guide in the separated position and its surrounding structure Top view showing the grain guide in the approach position and its surrounding structure Left side view showing the grain guide in the middle position and its surrounding structure The perspective view which shows the grain stem 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 A schematic diagram showing the transmission 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]
First, the overall structure of the combine will be briefly described with reference to FIG. FIG. 1 shows the left side of the combine 1 of this embodiment. In the drawing, the longitudinal direction, the lateral direction and the vertical direction of the combine 1 are indicated by arrows. The left and right direction corresponds to the machine width direction.

  The combine 1 includes a traveling unit 2, a harvesting unit 3, a threshing unit 4, a sorting unit 5, a storage unit 6, a discharge processing unit 7, a power unit 8 and a steering unit 9. The combine 1 threshs the cereal gravel harvested by the harvesting unit 3 with the threshing unit 4 while traveling by the traveling unit 2, and sorts the grains by the sorting unit 5 and stores the cereal in the storage unit 6. Exclusion after threshing is processed by the exclusion processing unit 7. The power unit 8 supplies power to the traveling unit 2, the harvesting unit 3, the threshing unit 4, the sorting unit 5, the storage unit 6, and the discharge processing unit 7. The operator steers the combine 1 at the control unit 9.

  The traveling unit 2 is provided below the machine body frame 20. The traveling unit 2 includes a transmission 21 (see FIG. 10) and a pair of left and right crawler traveling devices 22. The transmission 21 transmits the power of the engine 8 a of the power unit 8 to the crawler travel device 22. The crawler travel device 22 travels the combine 1 in the front-rear direction or turns the combine 1 in the left-right direction. In front of the traveling unit 2, a reaper unit 3 is provided.

  The reaper 3 includes a divider 31, a raising device 32, a cutting device 33, and a transfer device 34. The divider 31 guides the cereals of the field to the inducer 32. The inducer 32 causes the grain to be guided by the divider 31. The cutting device 33 cuts the grain clogged by the raising device 32. The transport device 34 transports the grain scale cut by the cutting device 33 to the threshing unit 4. In FIG. 1, a vertical transfer device 134 and an auxiliary transfer device 135 are shown as the transfer device 34. The vertical conveyance device 134 is configured to be movable in the vertical direction, and is located at the lowermost position in the illustrated state. At the time of operation, by changing the position of the vertical transfer device 134 in accordance with the length of the grain scale, it is possible to maintain the optimal transfer posture. The reaper 3 is configured to be movable up and down by a hydraulic cylinder 35 connected to the front end of the machine frame 20.

  The threshing unit 4 is provided at the rear of the reaper 3. The threshing unit 4 includes a feed chain 41 and a threshing cylinder 42. The feed chain 41 is provided at the rear of the reaper 3 and at the front of the threshing part 4. The feed chain 41 inherits the grain scale from the transport device 34 and transports it from the threshing unit 4 to the reject processing unit 7. The threshing cylinder threshes the grain carried by the feed chain 41.

  The side cover 43 covers the feed chain 41 from the left side which is the outer side in the machine width direction of the combine 1. Similarly, the presser foot cover 44 provided above the side cover 43 covers the threshing drum 42 and the like from the outer side in the machine width direction. An emergency stop switch Sw0 is installed above the presser foot cover 44. The emergency stop switch Sw0 is a pressing switch that is switched on / off by a pressing operation by the 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 and sorting apparatus 51 sorts the grain removed from the threshing part 4 into grains, scales and the like. The wind sorting device 52 supplies sorting air to the swing sorting device 51, and sorts the grain to be separated into grains, scales and the like together with the swing sorting device 51. 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 section 6. The chips and the like sorted by the rocking sorting device 51 and the wind sorting device 52 are discharged to the outside of the machine through the discharge processing unit 7.

  The storage unit 6 is provided on the right side of the threshing unit 4. The storage unit 6 includes a gren tank 61 and a discharge device 62. The grain tank 61 stores the grain transported from the sorting unit 5. The discharge device 62 is configured such that the front end (the tip on the downstream side of the grain conveyance downstream) can be pivoted vertically and horizontally around the rear end (the upstream end on the grain conveyance upstream side), The grains stored in the glen tank 61 can be discharged to any place.

  The discharge processing unit 7 is provided below the control unit 9 and behind the threshing unit 4. The reject processing unit 7 cuts and discharges the grains carried 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 harvesting unit 3, the threshing unit 4, the sorting unit 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 operation tools including a steering wheel 92. The driver's seat 91 is a seat where a worker sits. The handle 92 is a steering handle that changes the traveling direction of the combine 1. The operator can steer the combine 1 by operating a plurality of operating tools such as the steering wheel 92 while sitting on the driver's seat 91.

  Moreover, the combine 1 is provided with the grain stem guide 40. The grain stick guide 40 holds the grain stick and guides it to the feed chain 41 at the time of handling. The grain stem guide 40 is provided on the left side of the combine 1. The combine 1 of this embodiment further includes a guide member 45 and a pressing member 48 (see FIGS. 2 to 6). The guiding member 45 guides the grain with the grain guide 40 to the feed chain 41. The guide member 45 is disposed on the left side, which is the outer side of the auxiliary conveyance device 135 in the machine width direction. The pressing member 48 presses the grain scale against the feed chain 41 at the time of non-handling operation. In other words, the grain guide 40 and the guide member 45 are members that act on the grain at the time of handling (press the grain against the feed chain 41), and the pressing member 48 does not It is a member that acts (presses the grain scale against the feed chain 41).

[Grain guide]
Next, the grain guide will be described with reference to FIGS. The grain stem guide 40 includes a first switch Sw1 for permitting driving of the feed chain 41, an operation lever 401 as an operating tool for operating the grain stem guide 40, and a frame plate 402 rotatably supporting the operation lever 401. , And a guide rod 403 as a pressing member that presses the grain scale against the feed chain 41. The on / off switching of the first switch Sw1 is performed by the operation of the operation lever 401. The operation lever 401 serves as a handle for operating the turning of the grain stem guide 40.

  The grain stem guide 40 is pivoted around the rotation shaft 40a. The rotary shaft 40a is sandwiched between the frame plate 402 and the back plate 404 (front back plate) as shown in FIG. The rotating shaft 40 a is inserted into the cylindrical member 405 so as to be relatively rotatable. The cylindrical member 405 is interposed between the frame plate 402 and the back plate 404, and is fixed to the frame 114 of the reaper 3 via the bracket 406. With this configuration, the grain stem guide 40 is rotatably supported relative to the frame 114.

  The guide rod 403 is formed by bending a bar 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 403 a facing the transport surface of the feed chain 41 when the grain stem guide 40 is in the approach position approaching the feed chain 41. Further, the guide rod 403 is located in front of the facing portion 403 a, and is located behind the facing portion 403 a and a gap forming portion 403 b curved from the facing portion 403 a toward the rotating shaft 40 a. And a rear end portion 403c curved from the facing portion 403a.

  The grain stem guide 40 is configured to be pivotable between a separated position separated from the feed chain 41 and an approach position closer to the feed chain 41. The arrow R indicates the turning direction of the grain stem guide 40. As shown in FIG. 3, the grain stem guide 40 in the separated position is in a posture in which it rises from the rotation shaft 40 a upward, and the guide rod 403 is directed in the vertical direction. On the other hand, the grain stem guide 40 in the approach position is in a posture lying rearward from the rotation shaft 40a as shown in FIG. 2, and the guide rod 403 is disposed below the rotation shaft 40a. Hereinafter, the state in which the grain stem guide 40 is in the approaching position is referred to as the "approach state", and the state in which the grain stem guide 40 is in the separated position is referred to as the "spaced state".

  In the present embodiment, the rotary shaft 40a is provided at the front portion of the grain stem guide 40, and the grain stem guide 40 is rotated by clockwise in left side view shown in FIGS. Approach to However, the present invention is not limited to this. The rotary shaft 40a is provided at the rear portion of the grain stem guide 40, and the grain stem guide 40 approaches the feed chain 41 by rotating counterclockwise in left side view. It may be a configuration. Such a configuration is disclosed, for example, in the above-mentioned Patent Document 1.

  In the state where the grain scale guide 40 is in the approaching position, the facing portion 403 a is disposed above the feed chain 41, and the grain scale is pressed against the feed chain 41 by the facing portion 403 a. Further, in the approach state, since a gap is formed between the gap forming portion 403b which configures the front portion of the guide rod 403 and the feed chain 41, the transportation resistance of the kernels waiting at the front is reduced, Can be stabilized. Furthermore, since a gap is formed between the rear end portion 403c constituting the rear portion of the guide rod 403 and the feed chain 41, the grain guide guide 40 does not disturb the conveyance of the grain cake and stabilizes the posture of the grain cake Thus, the grain can be fed to the threshing cylinder 42 by the feed chain 41.

  In the present embodiment, the grain stem guide 40 includes an auxiliary rod 415. As shown in FIG. 4, the auxiliary rod 415 is disposed apart from the guide rod 403 inward in the machine width direction. The auxiliary rod 415 is formed by bending a bar 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 rods 415 extend substantially in parallel with the guide rods 403 and, together with the guide rods 403, press the grain scale against the feed chain 41. By simultaneously pressing both the original side and the tip side of the grain scale by the guide rod 403 and the auxiliary rod 415, bending of the grain scale can be prevented and the transport posture of the grain scale can be further stabilized.

  A tension spring 40 b as a biasing member is engaged with the grain stem guide 40. One end of the tension spring 40 b engages with a first engagement pin 407 as a first engagement portion, and the other end of the tension spring 40 b engages with an engagement jig 115 fixed to the frame 114. The first engagement pin 407 is provided in the vicinity of the rotation shaft 40 a. The first engagement pin 407 protrudes from the frame plate 402 toward the right side, which is the inner side in the vehicle width direction, but may protrude toward the opposite side (left side). The first engagement 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. It is located forward and horizontally with respect to the rotation shaft 40a.

  The tension spring 40b engaged with the first engagement pin 407 pulls the grain guide 40 so as to pull it away from the feed chain 41, and the operator does not operate the grain guide 40, that is, tension by the tension spring 40b. In the state where no external force other than the force (biasing force) is acting, the grain stem guide 40 is held at the separated position. That is, the combine 1 includes the tension spring 40b which biases the grain stem guide 40 toward the separated position, and the grain stem guide 40 in the approaching position is configured to move to the separated position by the action of the tension spring 40b. It is done. Therefore, at the time of hand-handling work, it is possible to eliminate the time and labor for the operator to move the grain skewer guide 40 to the separated position, and work efficiency is enhanced.

  The tension spring 40b can also be engaged with a second engagement pin 408 as a second engagement portion. The second engagement pin 408 is provided closer to the rotation shaft 40 a than the first engagement pin 407. The second engagement pin 408 protrudes from the frame plate 402 toward the left side, which is the outer side in the vehicle width direction, but may protrude toward the opposite side (right side). The second engagement pin 408 of the present embodiment is located rearward of the rotary shaft 40a in the approach state shown in FIG. 2 and horizontally with respect to the rotary shaft 40a, and in the separated state shown in FIG. Located at the top.

  The tension spring 40b engaged with the second engagement pin 408 pulls the grain guide 40 forward, but in the approach state shown in FIG. 2, the second engagement pin 408 is horizontally positioned behind the rotation shaft 40a. Thus, the grain guide 40 in the approach position is not turned toward the separation position, and the grain guide 40 in the approach position is held at the approach position. As described above, in the combine 1 of the present embodiment, in the state in which the tension spring 40b is engaged with the first engagement pin 407, the grain guide 40 in the approaching position is moved to the separated position by the action of the tension spring 40b. When the tension spring 40b is engaged with the second engagement pin 408, the grain guide 40 in the approaching position is configured to be held in the approaching position.

  The tension spring 40 b is alternatively engageable with the first engagement pin 407 and the second engagement pin 408 provided on the grain guide 40. The operator can arbitrarily select which of the first engagement pin 407 and the second engagement pin 408 the tension spring 40b is to be engaged according to the situation. When the combine 1 is in use, by engaging the tension spring 40b with the first engagement pin 407, the grain guide 40 is held exclusively at the separated position, so that the efficiency of the hand-handling operation is as described above. You can do it well. On the other hand, for example, when the dust guard cover is placed on the reaper 3 when the combine is stored, the tension spring 40b is engaged with the second engagement pin 408 in a situation where problems may occur if the grain guide 40 is in the separated position. Thus, the grain guide 40 can be held in the approach position.

  As shown in FIGS. 5 and 6, the combine 1 of the present embodiment prevents the movement of the grain stem guide 40 to the separated position by the action of the tension spring 40b, and is at an intermediate position between the separated position and the approaching position. A fixing member 47 capable of fixing the grain scale guide 40 is provided. According to this configuration, by fixing the grain stem guide 40 at an intermediate position without switching the engagement point of the tension spring 40b, the above-described problem may occur when the grain stem guide 40 is in the separated position. We can cope with the situation properly. Moreover, since the grain stem guide 40 is fixed not at the approach position but at an intermediate position, the grain stem guide 40 inhibits the transport of the grain stem even if the non-handling operation is performed with the fixing member 47 acting. There is no problem even if the worker forgets to remove the fixing member 47.

  In the present embodiment, as shown in FIG. 5, the grain guide 40 in the middle position is in a posture lying backward from the rotation shaft 40a, and the guide rod 403 is disposed at the same height as the rotation shaft 40a. In addition, although the first engagement pin 407 with which the tension spring 40b is engaged is positioned above the rotating shaft 40a, a pulling force is exerted to pull the grain guide 40 toward the separated position. The movement of the guide 40 is hindered by the fixing member 47. The midway position is not limited to the illustrated position, and may be a position at which the grain stem 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 guide 40 at an intermediate position and a non-fixed position (see FIG. 3) that does not prevent the movement of the grain guide 40. It is done. As shown in FIG. 6, the fixing member 47 has a rotating shaft 47 a serving as a fulcrum of rotation and a hook 47 b engageable with the grain guide 40. The rotation shaft 47 a is relatively rotatably supported by a bracket 418 fixed to the frame 114. That is, the fixing member 47 is rotatably supported relative to the frame 114. The hook 47 b engages with a rotary cylinder 413 (details of the rotary cylinder 413 will be described later) included in the grain guide 40, but may be engaged with another part of the grain guide 40. In addition, in FIG. 6, the backplate 404 is permeate | transmitted and drawn for convenience of explanation.

  In the state of FIG. 6, the fixing member 47 is in the fixing position. When the operator rotates the grain stem guide 40 from the separated position toward the approaching position, the rotary cylinder 413 also pivots together with the grain stem guide 40 along with the rotation operation. The hook 47 b of the fixing member 47 can be engaged with the rotary cylinder 413 at a predetermined position (halfway position) from the separated position to the close position of the grain guide 40. Then, the hook 47b engages with (the rotating cylinder 413 of) the grain guide 40 to prevent the movement of the grain guide 40 to the separated position or the approach position, and the grain guide 40 is fixed at an intermediate position. . When the fixing member 47 is rotated backward to release the engagement of 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 approximated position is not prevented. Become. The work of fixing the grain scale guide 40 at an intermediate position can be simply performed because only the fixing member 47 is turned in this manner. The fixing member 47 is formed of a plate material, but is not limited thereto.

[Guiding 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 45 a supported by the frame 114 and a slope 45 b inclined downward toward the rear. The pedestal 45 a is supported by the frame 114 via the bracket 418. The pedestal 45a is disposed rearward of the rotation shaft 40a. The slope 45 b is located rearward of the pedestal 45 a and extends along the transport direction of the feed chain 41 in plan view as shown in FIG. 4. The lower end (rear end) 45 c of the slope 45 b is located above the feed chain 41.

  The guide member 45 guides the grain scale to the feed chain 41 by the slope 45 b. In addition, the slope 45 b supports the grain scale so that the grain scale placed on the transport surface of the feed chain 41 does not fall forward. As shown in FIG. 3, the slope 45 b extends in a direction substantially perpendicular or slightly inclined with respect to the transport surface at the front of the feed chain 41 in a left side view, in other words, on the transport surface of the feed chain 41. On the other hand, it has a substantially V-shaped positional relationship. By providing the guide member 45, the grain scale can be supported at the time of handling operation, and the grain scale can be guided to the feed chain 41 together with the grain scale guide 40. The guided gravel is conveyed by the feed chain 41 above the pressing member 48. That is, in the manual handling operation, the pressing member 48 does not exert the function of pressing the grain scale against the feed chain 41.

  In the present embodiment, the extension member 451 is attached above the pedestal 45 a so as to extend the slope 45 b upward so as to support more cereal grains. However, a configuration without such an extension member 451 may be employed. Alternatively, the guide member 45 itself may be shaped like this. Although the guide member 45 is formed by bending a plate material, it is not limited to this.

  The pressing member 48 presses the grain scale conveyed by the conveying device 34 of the reaper 3 toward the feed chain 41 during the non-handling operation. The pressing member 48 is interposed between the facing portion 48 a facing the transport surface of the feed chain 41, the support portion 48 b rotatably supported relative to the bracket 49, and the facing portion 48 a and the support portion 48 b. And a connecting portion 48c connecting the two. The support portion 48 b extends in the left-right direction. The connecting portion 48 c is curved and extends from the facing portion 48 a toward the supporting portion 48 b. Although the pressing member 48 is formed by bending a bar having a circular cross section, the present invention is not limited to this. For example, the pressing member 48 may be formed of a plate material.

  The support portion 48 b is relatively rotatably inserted into the cylindrical portion 491 of the bracket 49 fixed to the frame 114. With this configuration, the pressing member 48 is attached to the frame 114 via the bracket 49 and is supported so as to be rotatable relative to the frame 114. The facing portion 48 a approaches the transport surface of the feed chain 41 by the weight of the pressing member 48. Therefore, the pressing member 48 at the time of the non-handling operation moves up and down according to the bulk of the supplied scale. The up and down movement refers to up and down movement of the facing portion 48 a and the connecting portion 48 c by rotation around the support portion 48 b. The upward movement of the pressing member 48 described later is also synonymous with this.

  The pressing member 48 is located below the slope 45 b. The rear portion of the connecting portion 48c is disposed immediately below the lower end edge 45e of the slope 45b. At the time of non-handling work, the pressing member 48 moves upward beyond the lower end edge 45 e due to the vibration of the combine 1 and the bulkiness of the grain scale, and rises to the height as shown by the chain line in FIG. 3 It is conceivable. When the pressing member 48 is in such a position, the grain can not be properly pressed against the feed chain 41, which may cause clogging of the grain and a decrease in the transfer efficiency.

  Therefore, as shown in FIGS. 7 and 8, in the combine 1, the lower end 45c of the slope 45b is formed wider than the upper end 45d of the slope 45b. Thereby, the pressing member 48 is prevented from moving upward beyond the lower end edge 45 e of the slope 45 b, and the grain can be appropriately pressed by the pressing member 48 at the time of non-handling operation. The widening of the lower end 45c in this manner, rather than forming the slope 45b wide as a whole, means that the slope 45b and the approaching grain weir guide 40 disposed on the outer side in the width direction of the machine body. It is convenient to secure the interval between

  In the present embodiment, the slope 45b extends from the upper end 45d toward the lower end 45c with a constant width (width Wd), and is partially widened at the lower end 45c. The width Wc of the lower end 45c is larger than the width Wd of the upper end 45d. The width Wc and the width Wd are each measured along the left-right direction which is the machine width direction. As shown in FIG. 7, the lower end 45 c is at a position overlapping the pressing member 48 in a plan view. The lower end 45c gradually widens downward, and becomes wider toward the lower end 45e. In the guide member 45, the bar 45f having a circular cross-sectional shape is attached to the lower end edge 45e in order to suppress the hook with the grain crucible, but this may be omitted.

  In the non-handling operation, the pressing member 48 tends to move upward through the widthwise outer side of the guide member 45 because the grain scale is transported from the inner side to the outer side in the widthwise direction of the machine by the transfer device 34. is there. For this reason, it is preferable that the lower end 45c protrudes at least outward in the machine body width direction. In the present embodiment, the lower end portion 45 c is formed so as not to project inward in the machine body width direction but to project only to the left side in the machine body width direction. As shown in FIG. 8, the side portion 45 s of the lower end portion 45 c on the outer side in the machine body width direction is inclined downward toward the outer side in the machine body width direction. The shape of the side portion 45s is useful for preventing the pressing member 48 from moving upward through the outer side of the guide member 45 in the machine width direction.

  As shown in FIG. 7, the lower end edge 45 e is inclined rearward toward the outside in the widthwise direction of the vehicle. Further, as shown in FIG. 8, the lower end edge 45 e is inclined downward toward the outer side in the vehicle body width direction. With any of the configurations, when the pressing member 48 moving upward is brought into contact with the lower end edge 45e, the force to move the slope 45b outward in the machine width direction and / or the pressing member 48 in the machine width direction A force to move inward acts, and as a result, it is possible to more effectively prevent the pressing member 48 from moving upward beyond the lower end edge 45e of the slope 45b.

  As described above, in the combine 1, since the lower end edge 45e is inclined downward toward the outer side in the machine body width direction, the slope when the pressing member 48 which is going to move upward contacts the lower end edge 45e. A force acts to move 45b downward. At this time, if the slope 45b moves largely downward, there is a possibility that the lower end edge 45e may be caught by the grain held by the pressing member 48. Therefore, in the present embodiment, as shown in FIG. 8, the pressing member 48 is disposed outside the widthwise center position of the slope 45 b in the machine body width direction so that such a problem does not occur.

[Hand handling safety device]
Next, a handling safety device for improving the safety during handling work will be described. Combine 1 is provided with 2nd switch Sw2 which permits drive of feed chain 41 in addition to the 1st switch Sw1 mentioned above. The first switch Sw1 can be switched on / off in accordance with the operation of the operation lever 401. The second switch Sw2 is switched on / off by the pressing operation of the operator. The second switch Sw2 is always off and is on only while the operator is pressing. The feed chain 41 is driven when both the first switch Sw1 and the second switch Sw2 are switched on. This prevents the feed chain 41 from being driven against the operator's intention, and safety can be improved.

  The first switch Sw1 is switched between 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 rotation shaft 40a, and the first switch Sw1 is formed in the bent portion 40f. It is attached. The button of the first switch Sw1 that is turned on by the pressing operation is protruded downward through the bending portion 40f.

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

  When the control lever 401 is rotated clockwise in a left side view from the approach state shown in FIG. 2, the control lever 401 rotates relative to the frame plate 402, and the first switch Sw1 is rotated by the rotation of the pressing plate 414 accordingly. Is pressed, and the first switch Sw1 is switched on. In a state where the first switch Sw1 is switched on, the operation lever 401 is biased counterclockwise in left side view by the torsion coil spring 410. The operating lever 401 rotated relative to the frame plate 402 can return to the original position by the biasing force of the torsion coil spring 410. The biasing force of the torsion coil spring 410 is such that when the operating lever 401 is operated to move the grain guide 40 from the separated position to the approaching position, the operating lever 401 does not rotate around the operating center shaft 40c. Be done. That is, the control lever 401 applies the operation center shaft 40c to the control lever 401 by applying a force stronger than the force for moving the scale guide 40 to the approach position after the scale guide 40 is moved to the approach position. It pivots to the center.

  With this configuration, the worker can switch on and off the first switch Sw1. That is, after the operation lever 401 is operated to arrange the grain stem guide 40 at the approach position, the first switch Sw1 can be switched on by operating the operation lever 401 toward the feed chain 41. Then, the first switch Sw1 can be switched off by operating the operation lever 401 so as to be separated from the feed chain 41.

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

  The second switch Sw2 is disposed in front of the grain stem guide 40. The second switch Sw2 is supported by the frame 114. The operator drives the feed chain 41 by pushing the second switch Sw2 with the left hand and maintaining the ON state of the second switch Sw2 while holding down the operation lever 401 with the right hand to maintain the ON state of the first switch Sw1. it can.

  The second switch Sw2 may be disposed rearward of the grain stem guide 40, and may be installed, for example, on the weir presser foot cover 44. In this case, the operator can drive the feed chain 41 by switching on the first switch Sw1 and the second switch Sw2 by pushing the second switch Sw2 with the right hand while operating the operation lever 401 with the left hand. Furthermore, if the second switch Sw2 is disposed at both the front and the rear of the grain guide 40 so that it can be selectively used, it is possible to cope with whether the operator has the left hand or the right hand.

  By the way, if the grain scale is excessively supplied at the time of the handling operation, the grain scale guide 40 does not fall down due to the bulkiness of the grain scale, and the grain scale guide 40 does not sufficiently approach the feed chain 41. Even in this state, since the first switch Sw1 can be switched on, the feed chain 41 can be driven to perform the handling operation, but there is a problem such as the cereal gravel not being properly taken into the threshing part 4 May come. Therefore, in order to avoid the handling operation in such an inappropriate state, this combine 1 detects the position (turning amount) of the grain stem guide 40, and based on the detection result, predetermined control is performed. To be done.

  As shown in FIG. 6, the grain stem guide 40 is provided with a rotation angle sensor 89 that detects the position (rotation amount) of the grain stem guide 40, that is, the rotation angle of the grain stem guide 40. The rotation angle sensor 89 is configured of, for example, a potentiometer. The rotation angle sensor 89 has a lever 89a rotatably supported. The lever 89a is disposed rearward of the rotation shaft 40a. The lever 89a is biased forward, and the position of contact with the cylindrical member 405 is the limit of the pivot range of the lever 89a in front. When the grain guide 40 is turned from the separated position toward the approaching position, the rotary cylinder 413 contacts the lever 89 a in the process, and the lever 89 a is rotated to a position according to the rotation angle of the grain guide 40. Based on the rotation angle of the lever 89a, the position (rotation amount) of the grain guide 40 is detected.

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

  In the present embodiment, an example in which the operator manually operates the grain guide is described. However, the present invention is not limited thereto. The grain guide may be driven by a motor or the like. However, even with such a structure, it is preferable for the operator to operate using both hands in terms of safety. Therefore, it is conceivable to dispose a third switch Sw3 as shown in FIG. 9, for example. 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.

[Working of the worker during manual handling work]
Next, the operation of the worker at the time of handling operation will be briefly described. The handling operation starts with the combine 1 stopped, that is, with the crawler travel device 22 stopped and the feed chain 41 stopped.

  The operator who performs the handling operation moves to a position where the grain guide 40 can be operated on the left side of the combine 1 (hereinafter referred to as “hand-handling work position”), and places the cut grain crucible in a predetermined place Place. The predetermined place refers to a place where the grain can be held by the guide rod 403 when the grain guide 40 is turned downward, and is an area formed by the slope 45 b and the transport surface of the feed chain 41. It is. In this embodiment, since the grain stem guide 40 is in the separated position in advance by the action of the tension spring 40b, it is not necessary to turn the grain stem guide 40 upward before placing the grain stem, and the working efficiency can be enhanced. .

  Since the predetermined place mentioned above will become narrow and it will become difficult to mount a grain scale if the reaper part 3 is rising, it is preferable to perform the hand-handling operation in the state which made the reaper part 3 fall. The raising and lowering of the reaper 3 is usually configured to be operable by an operating tool provided in the control unit 9. Therefore, when the user moves to the handling position while raising the reaper 3 while forgetting to lower the reaper 3, the operator reciprocates from the control portion 9 to that position. It is necessary to lower the reaper 3 and the operation becomes complicated.

  Then, in order to eliminate such a disadvantage, an operating tool for raising and lowering the reaper 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 reaper 3 on the weir presser base cover 44. The switch 36 may be installed on the side cover 43 or other places without being limited to the tack holder cover 44. The switch 36 may be capable of operating only the lowering of the reaper 3. Alternatively, when both the first switch Sw1 and the second switch Sw2 are switched on, the reaper 3 may be configured to be automatically lowered.

  After placing the grain crucible in a predetermined place, the operator turns the grain crucible guide 40 so as to approach the feed chain 41 to hold the grain crucible. Then, the control lever 401 is turned toward the feed chain 41 from that state, and the first switch Sw1 is switched on. The operation of turning on the first switch Sw1 is an operation of holding the operation lever 401 and pushing the grain guide 40 toward the feed chain 41. Then, the operator presses the second switch Sw2 while holding 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 handling operation.

[Power transmission mechanism]
Next, referring to FIG. 10, the power transmission mechanism of the combine 1 will be described. The main part of the power transmission mechanism and the part related to the present invention will be described, and the description of the other parts will be omitted.

  The power transmission mechanism of the combine 1 has a transmission 21, a threshing part transmission 186, a feed chain transmission 187, and a rotating shaft and a belt for transmitting 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 8 a is transmitted to the transmission 21 via the belt wound around the output pulley 181 and transmitted from the transmission 21 to the traveling portion output pulley 141. The stepless change device 23 included in the transmission 21 converts the rotational power of the engine 8a into hydraulic pressure and then converts the hydraulic pressure into rotational power to drive the crawler travel device 22. With this configuration, the transmission 21 can change the drive state of the crawler travel device 22 and can travel the combine 1 in any 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 a power transmission case 185.

  The rotational power transmitted to the traveling part output pulley 141 is transmitted to the reaper part first input pulley 142. A belt is wound between the traveling portion output pulley 141 and the reaper portion first input pulley 142. Furthermore, rotational power is transmitted from the threshing portion output pulley 143 to the reaper portion second input pulley 144 as well. A belt is wound between the threshing portion output pulley 143 and the reaper portion second input pulley 144, and the belt is provided with a tension clutch 145. The reaper portion first input pulley 142 and the reaper portion second input pulley 144 are fixed to one end of a reaper first shaft 147 that constitutes a reaper input shaft. An auxiliary transfer drive case 210 of the auxiliary transfer device 135 is fixed to the other end of the reaper first shaft 147. A bevel gear 148 is fixed to an intermediate portion of the reaper first shaft 147, and rotational power is transmitted to the reaper 3 via the bevel gear 148.

  At the time of non-handling operation, the tension clutch 145 is switched to the off state, and power is transmitted from the traveling portion output pulley 141 to the reaper portion first input pulley 142. Even when the traveling unit 2 is in a stopped state, the threshing unit 4 is driven when only the pouring operation of the cereal grist is performed. At this time, power is transmitted from the threshing portion output pulley 143 to the reaper portion second input pulley 144 by switching the tension clutch 145 to the on state.

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

  The feed chain transmission device 187 includes a feed chain transmission case 201, a transmission input shaft 194 passing through the feed chain transmission case 201, and a feed chain transmission provided on the outer side in the machine width direction than the feed chain transmission case 201. It has a belt-type continuously variable machine 208 which is a mechanism, and a variable-output shaft 260 which outputs the power output from the belt-type continuously variable machine 208. The belt-type continuously variable machine 208 can synchronize the transport speed of the feed chain 41 and the cutting speed of the reaper 3 with the traveling speed of the combine 1.

  The transmission of 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 allows the power transmission second shaft 183 to transmit power. The rotational power is transmitted to the shaft 191. A bevel gear 197 is fixed to an intermediate portion of the power transmission second shaft 191, and rotational power is transmitted to the threshing portion output shaft 192 via the bevel gear 197. The threshing portion output shaft 192 is a shaft for transmitting rotational power to a threshing drum and a displacement processing device not shown in FIG.

  The transmission of 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 transfers the power transmission second shaft 191 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 a belt-type continuously variable unit 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, and the groove width of the output pulley 250 is increased, and wound around the output pulley 250 The diameter of the belt 290 is reduced. As a result, the variable ratio of the belt-type continuously variable variable machine 208 changes to the increase side, and the conveyance speed of the feed chain 41 changes to the increase 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 and the groove width of the output pulley 250 is narrowed. The diameter of the belt 290 to be turned increases. As a result, the variable ratio of the belt-type continuously variable machine 208 changes to the reduction side, and the transport speed of the feed chain 41 changes to the reduction side.

  A power transmission sprocket 195 is provided at an end of the variable output shaft 260, and the rotational power is transmitted to the power transmission sprocket 196 relatively rotatably fitted to the variable input shaft 194 through the power transmission sprocket 195. Is transmitted. The gears provided on the power transmission sprocket 196 transmit power to the feed chain output shaft 199 via a power transmission mechanism 198 consisting 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. A feed chain rotating sprocket 205 is provided on the feed chain output shaft 199, 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 stopping mechanism 193. The feed chain stopping mechanism 193 is a mechanism for switching on / off of power transmission to the feed chain 41. The feed chain stopping mechanism 193 is constituted by 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. The oil path of the hydraulic actuator 204 is provided with a two-position four-port solenoid valve 206. When the solenoid of the solenoid valve 206 is energized, the hydraulic actuator 204 extends, and when the solenoid is de-energized, the hydraulic actuator 204 is shortened. By extension of the hydraulic actuator 204, the clutch is coupled to the gear so as not to be rotatable relative to the gear and switched to the connected state, and shortening of the hydraulic actuator 204 separates the clutch from the gear to switch to the disconnected state.

  The solenoid valve 206 is controlled by the controller 80, and sends a pulse signal to the solenoid when it receives a pulse signal from the controller 80. The control device 80 is also connected to the engine 8a. For example, when the power of the control device 80 is shut off, the driving of the engine 8a also stops. The combine 1 can drive the feed chain stopping mechanism 193 by extending the hydraulic actuator 204 when the power supply of the control device 80 is shut off (when the driving of the engine 8a is stopped). Thereby, the transmission of the rotational power to the feed chain 41 is shut off, and the feed chain 41 can be forcibly stopped. The feed chain stopping mechanism 193 may be driven by an electric actuator instead of the hydraulic 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 stopping mechanism 193 that changes the transmission or interruption of the power to the reaper 3. The controller 80 can control the feed chain stopping mechanism 193 by transmitting a control signal to the solenoid valve 206.

  The control device 80 is connected to an emergency stop switch Sw0 that can transmit 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 driving of the engine 8a and stops the driving of the feed chain 41.

  The control device 80 is connected to a first switch Sw1 and a second switch Sw2 that can transmit an input signal to the control device 80. When the feed chain stopping mechanism 193 is in the connected state and the feed chain 41 is stopped after the feed chain stopping mechanism 193 is connected, the control device 80 operates the feed chain stopping mechanism 193 when both the first switch Sw1 and the second switch Sw2 are simultaneously turned on. Is driven to drive the feed chain 41. The control device 80 can grasp the driving state of the crawler travel device 22 and makes the operation of the first switch Sw1 effective only when the crawler travel 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 stem guide 40. When driving the feed chain 41 at the time of manual handling operation, the control device 80, when the position of the grain stem guide 40 is higher than the predetermined position, that is, the amount of rotation of the grain stem guide 40 is smaller than the predetermined amount of rotation In this case, a signal is sent to the alarm device 270 to emit an alarm, a signal is sent to the solenoid 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 embodiment described above, and various improvements and modifications can be made without departing from the spirit of the present invention. In the embodiment described above, the lower end 45c of the slope 45b of the guide member 45 is formed wider than the upper end 45d, but is not limited thereto.

Reference Signs List 1 combine 2 traveling unit 3 reaping unit 4 threshing unit 40 grain guide 40 a rotating shaft 40 b tension spring (an example of biasing member)
41 feed chain 45 guide member 45a base 45b slope 45c lower end 45d upper end 45e lower end edge 45s side part 47 fixed member 47a rotating shaft 47b hook 48 pressing member 401 operation lever 402 frame plate 403 guide rod 407 first engagement pin ( First engagement part)
408 Second engagement pin (second engagement part)
451 extension member Sw1 first switch Sw2 second switch

Claims (4)

A feed chain that transports the grain to the threshing part;
A grain guide that is pivotable between a spaced apart position spaced from the feed chain and an approached position approaching the feed chain;
And a biasing member for biasing the grain guide toward the separated position,
A combine according to which the grain guide in the approaching position is configured to move to the separated position by the action of the biasing member. The biasing member is alternatively engageable with a first engaging portion and a second engaging portion provided on the grain guide.
In a state in which the biasing member is engaged with the first engaging portion, the grain guide in the approaching position is moved to the separated position by the action of the biasing member, and the second engaging portion is attached to the second engaging portion. The combine according to claim 1, wherein when the pressing member is engaged, the grain guide in the close position is configured to be held in the close position.   The stationary member according to claim 1 or 2, further comprising: a fixing member capable of fixing the cereal weir guide at an intermediate position between the spaced position and the approaching position, preventing movement of the cereal grain guide to the spaced position by the action of the biasing member. Combine according to 2. The fixing member is configured to be pivotable between a fixed position at which the grain guide is fixed at an intermediate position and a non-fixed position at which the movement of the grain guide to the separated position is not impeded. Combines as described in.

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