JP7408729B2 - combine - Google Patents

Description

The present invention relates to a combine harvester.

Patent Document 1 describes a combine harvester equipped with a grain culm guide that holds grain culms during manual handling work. The grain culm guide is configured to be rotatable between a remote position away from the feed chain and an approach position close to the feed chain. In the combine harvester described in this document, the grain culm guide is urged downward by a spring, and the grain culm guide is held in the close position when not in use. Therefore, during manual handling work, it is necessary for the operator to manually move the grain culm guide to the separated position before placing the grain culm on the conveying surface of the feed chain.

Japanese Patent Application Publication No. 2014-150781

An object of the present invention is to provide a combine harvester that can improve work efficiency during manual handling using grain culm guides.

The combine harvester according to the present invention includes a feed chain that conveys grain culms to a threshing section, a grain culm guide that is rotatable between a remote position away from the feed chain and an approach position close to the feed chain. , and a guide member that guides the grain culm to the feed chain. The grain culm guide, when in the approach position, is positioned to intersect with the guide member in side view.

In the combine harvester having the above configuration, the grain culm guide is configured to be located above the guide member when in the separated position.

In the combine harvester configured as described above, the grain culm guide has a pressing member that presses the grain culm, the guide member has a slope, and when the grain culm guide is at the separated position, the pressing member is , located on an extension of the slope.

Left side view of combine Left side view showing the grain culm guide in the approaching position and its surrounding structure Left side view showing the grain culm guide and its surrounding structure at a distance Plan view showing the grain culm guide in the approaching position and its surrounding structure Left side view showing the grain culm guide in the middle position and its surrounding structure Perspective view showing the grain guide at an intermediate position and its surrounding structure A plan 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 power transmission structure mechanism of a combine harvester Block diagram showing the configuration of the combine control system

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

[Overall structure of combine]
First, the overall structure of the combine harvester will be briefly explained with reference to FIG. FIG. 1 shows the left side of the combine harvester 1 of this embodiment. In the figure, arrows indicate the front-rear direction, left-right direction, and up-down direction of the combine harvester 1. The left and right direction corresponds to the width direction of the fuselage.

The combine 1 includes a running section 2, a reaping section 3, a threshing section 4, a sorting section 5, a storage section 6, and a straw processing section 7.
, a power section 8 and a control section 9. While the combine harvester 1 is traveling by a running part 2, a threshing part 4 threshes grain culms cut by a reaping part 3, grains are sorted by a sorting part 5, and grains are sorted by a storage part 6.
Store in. The waste straw after threshing is processed by the waste straw processing section 7. The power section 8 supplies power to the running section 2, the reaping section 3, the threshing section 4, the sorting section 5, the storage section 6, and the straw processing section 7. The operator operates the combine harvester 1 at the control section 9.

The traveling section 2 is provided below the body frame 20. The traveling section 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 8a of the power section 8 to the crawler type traveling device 22.
The crawler type traveling device 22 causes the combine 1 to travel in the front-rear direction or to turn in the left-right direction. A reaping section 3 is provided in front of the traveling section 2.

The reaping section 3 includes a divider 31, a pulling device 32, a cutting device 33, and a conveying device 34. The divider 31 guides the grain culm in the field to the pulling device 32 . The lifting device 32 raises the grain culm guided by the divider 31. The cutting device 33 cuts the grain culm raised by the pulling device 32 . The conveying device 34 conveys the grain culm cut by the cutting device 33 to the threshing section 4 . FIG. 1 shows a vertical conveyance device 134 and an auxiliary conveyance device 135 as the conveyance device 34. The vertical conveyance device 134 is configured to be movable in the vertical direction, and is located at the lowest position in the illustrated state. During operation, vertical conveyor device 1 is installed according to the length of the grain culm.
By changing the position of 34, an optimal conveyance posture can be maintained. The reaping section 3 is configured to be movable up and down by a hydraulic cylinder 35 connected to the front end of the body frame 20.

The threshing section 4 is provided behind the reaping section 3. The threshing section 4 includes a feed chain 41 and a handling cylinder 42. The feed chain 41 is provided at the rear of the reaping section 3 and at the front of the threshing section 4. The feed chain 41 receives the grain culm from the conveyance device 34,
The straw is transported from the threshing section 4 to the straw processing section 7. The handling cylinder 42 threshes grain culms conveyed 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 width direction of the combine harvester 1 . A straw presser cover 44 provided above the side cover 43 similarly covers the handling barrel 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 press-type switch that can be turned on/off by a press operation by an operator. When the emergency stop switch Sw0 is turned on, the driving of the engine 8a is forcibly stopped, and the driving of each part including the feed chain 41 is stopped.

The sorting section 5 is provided below the threshing section 4. The sorting section 5 includes a swing sorting device 51 and a wind sorting device 52. The swinging sorting device 51 sorts the threshed grains that have fallen from the threshing section 4 into grains, straw waste, and the like. The wind sorting device 52 supplies sorting air to the swinging sorting device 51, and together with the swinging sorting device 51, sorts the threshed grains into grains, straw waste, and the like. The grains sorted by the swing 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 straw waste sorted by the swing sorting device 51 and the wind sorting device 52 is discharged to the outside of the machine via the waste straw processing section 7.

The storage section 6 is provided on the right side of the threshing section 4. The storage section 6 includes a grain tank 61,
A discharge device 62 is provided. The grain tank 61 stores the grains conveyed from the sorting section 5. The discharge device 62 is configured such that its front end (the distal end on the downstream side of grain transport) is rotatable in vertical and horizontal directions around the rear end (base end on the upstream side of grain transport). glen tank 61
The grains stored in can be discharged to any location.

The straw disposal section 7 is provided below the control section 9 and at the rear of the threshing section 4. The waste straw processing section 7 cuts and discharges the grain culms 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 reaping section 3, the threshing section 4, the sorting section 5, and the like.

The control section 9 is provided above the power section 8. The control unit 9 includes a driver's seat 91 and a plurality of operating tools including a handle 92. The driver's seat 91 is a seat where a worker sits. The handle 92 is a steering handle that changes the direction in which the combine 1 moves. The worker is in the driver's seat 91
By operating multiple operating tools such as the handle 92 while seated on the combine harvester 1,
can be operated.

Further, the combine harvester 1 includes a grain culm guide 40. The grain culm guide 40 holds down the grain culm and guides it to the feed chain 41 during manual handling work. Grain culm guide 40 is provided on the left side of combine 1. The combine harvester 1 of this embodiment further includes a guide member 45 and a pressing member 48 (see FIGS. 2 to 6). The guide member 45 guides the grain stem to the feed chain 41 together with the grain stem guide 40 . The guide member 45 is arranged on the left side of the auxiliary conveyance device 135 on the outside in the width direction of the machine body. The pressing member 48 presses the grain culm against the feed chain 41 during non-handling operations. That is, the grain culm guide 40 and the guide member 45 are members that act on the grain culm (press the grain culm against the feed chain 41) during manual handling work, and the pressing member 48 is a member that acts on the grain culm during non-handling work. It is a member that acts (presses the grain culm against the feed chain 41).

[Grain culm guide]
Next, the grain culm guide will be explained with reference to FIGS. 2 to 6. The grain culm guide 40 includes a first switch Sw1 that allows the drive of the feed chain 41, an operating lever 401 as an operating tool for operating the grain culm guide 40, and a frame plate 40 that rotatably supports the operating lever 401.
2, and a guide rod 4 as a pressing member that presses the grain culm against the feed chain 41.
03. The first switch Sw1 is turned on/off by operating the operating lever 401. The operating lever 401 serves as a handle for operating the rotation of the grain culm guide 40.

The grain culm guide 40 rotates around the rotating shaft 40a as a fulcrum. As shown in FIG. 4, the rotating shaft 40a is sandwiched between a frame plate 402 and a back plate 404 (front back plate), and is integrally fixed thereto. The rotating shaft 40a 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 also interposed between the bracket 4
06 to the frame 114 of the reaping section 3. With this configuration, the grain guide 40 is supported relatively rotatably with respect to the frame 114.

The guide rod 403 is formed by bending a bar with 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 conveying surface of the feed chain 41 when the grain stem guide 40 is in the approach position close to the feed chain 41. The guide rod 403 is
Furthermore, a gap forming part 403b is located in front of the facing part 403a and curved from the facing part 403a toward the rotating shaft 40a, and a gap forming part 403b is located in the rear of the facing part 403a and curved away from the facing part 403a in a direction away from the feed chain 41. It has a rear end portion 403c.

The grain culm guide 40 is configured to be rotatable between a remote position away from the feed chain 41 and an approach position close to the feed chain 41. Arrow R indicates grain culm guide 40
Indicates the direction of rotation. The grain culm guide 40 in the separated position stands up from the rotating shaft 40a upward as shown in FIG. 3, and the guide rod 403 is directed in the vertical direction. On the other hand, the grain culm guide 40 in the approaching position is in a posture lying backward from the rotating shaft 40a as shown in FIG. 2, and the guide rod 403 is arranged below the rotating shaft 40a. Hereinafter, a state in which the grain culm guide 40 is in the approaching position will be referred to as an "approaching state", and a state in which the grain culm guide 40 is in the separated position will be referred to as a "separated state".

In this embodiment, the rotation shaft 40a is provided in the front part of the grain culm guide 40, and FIGS.
The grain culm guide 40 approaches the feed chain 41 by rotating clockwise in the left side view shown by . However, the present invention is not limited to this, and the rotation shaft 40a is provided at the rear part of the grain culm guide 40, and the grain culm guide 40 approaches the feed chain 41 by rotating counterclockwise when viewed from the left side. It doesn't matter what the configuration is. Such a configuration is disclosed in, for example, the above-mentioned Patent Document 1.

When the grain culm guide 40 is in the approach position, the facing portion 40 is located above the feed chain 41.
3a is arranged, and the grain culm is pressed against the feed chain 41 by this facing portion 403a. In addition, in the approaching state, the gap forming part 403b that constitutes the front part of the guide rod 403
Since a gap is formed between the grain culm and the feed chain 41, the transportation posture of the grain culm can be stabilized while reducing the transportation resistance of the grain culm waiting in front. Furthermore, since a gap is formed between the rear end portion 403c that constitutes the rear portion of the guide rod 403 and the feed chain 41, the grain culm guide 40 does not hinder the conveyance of the grain culms and stabilizes the posture of the grain culms. , feed chain 4
1 allows the grain culm to be fed into the handling cylinder 42.

In this embodiment, the grain culm guide 40 includes an auxiliary rod 415. As shown in FIG. 4, the auxiliary rod 415 is arranged apart from the guide rod 403 inward 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 together with the guide rod 403 presses the grain culm against the feed chain 41.
By simultaneously pressing both the stock side and the ear side of the grain culm with the guide rod 403 and the auxiliary rod 415, bending of the grain culm can be prevented and the conveyance posture of the grain culm can be made more stable.

A tension spring 40b serving as a biasing member is engaged with the grain culm guide 40. tension spring 4
One end of the tension spring 40b is engaged with a first engagement pin 407 serving as a first engagement portion, and the other end of the tension spring 40b is engaged with an engagement jig 115 fixed to the frame 114. The first engagement pin 407 is provided near the rotating shaft 40a. The first engagement pin 407 protrudes from the frame plate 402 toward the right side, which is the inner side in the width direction of the body, but may protrude toward the opposite side (left side). In the approach state shown in FIG.
0a and slightly behind the rotating shaft 40a, and in the separated state shown in FIG.
It is located in front of the rotating shaft 40a and horizontally to the rotating shaft 40a.

The tension spring 40b engaged with the first engagement pin 407 pulls the grain culm guide 40 away from the feed chain 41, and the state where the operator is not operating the grain culm guide 40, that is, the tension by the tension spring 40b In a state where no external force other than force (biasing force) is acting, the grain culm guide 40 is held at the separated position. That is, the combine harvester 1 includes a tension spring 40b that urges the grain stem guide 40 toward the separated position, and is configured such that the grain stem guide 40 in the approach position moves to the separated position by the action of the tension spring 40b. has been done. Therefore, during manual handling work, the worker can save the effort of moving the grain culm guide 40 to the separated position, and work efficiency is improved.

The tension spring 40b can also engage with a second engagement pin 408 as a second engagement portion.
The second engagement pin 408 is provided closer to the rotating shaft 40a 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 width direction of the body, but may protrude toward the opposite side (right side). Second engagement pin 4 of this embodiment
08 is located behind the rotating shaft 40a and horizontally to the rotating shaft 40a in the approach state shown in FIG. 2, and is located above the rotating shaft 40a in the separated state shown in FIG.

Although the tension spring 40b engaged with the second engagement pin 408 pulls the grain culm guide 40 forward, in the approach state shown in FIG. 2, the second engagement pin 408 is positioned horizontally behind the rotating shaft 40a. Therefore, the grain culm guide 40 in the approaching position is not rotated toward the separating position.
The grain culm guide 40 in the approach position is held as it is in the approach position. In this way, in the combine harvester 1 of this embodiment, when the first engagement pin 407 is engaged with the tension spring 40b, the grain culm guide 40 in the approach position is moved to the separation position by the action of the tension spring 40b. When the tension spring 40b is engaged with the second engagement pin 408, the grain culm guide 40 in the approach position is held in the approach position.

The tension spring 40b is connected to a first engagement pin 407 and a second engagement pin 4 provided on the grain culm guide 40.
08 can be engaged with alternatively. The operator can arbitrarily select which of the first engagement pin 407 and the second engagement pin 408 should be engaged with the tension spring 40b, depending on the situation. When the combine harvester 1 is used, by engaging the tension spring 40b with the first engagement pin 407, the grain culm guide 40 is exclusively held in the separated position, which makes manual handling work more efficient as described above. I can do it well. On the other hand, in situations where it may be inconvenient if the grain culm guide 40 is in a separated position, such as when a dust cover is placed over the reaping part 3 when the combine is stored, the tension spring 40b is engaged with the second engagement pin 408. Thus, the grain guide 40 can be held in the approach position.

As shown in FIGS. 5 and 6, the combine harvester 1 of this embodiment prevents the grain culm guide 40 from moving to the separated position due to the action of the tension spring 40b, and prevents the grain culm guide 40 from moving to the separated position at an intermediate position between the separated position and the approach position. A fixing member 47 capable of fixing the grain culm guide 40 is provided. According to this configuration, the tension spring 40
By fixing the grain culm guide 40 at an intermediate position without switching the engagement point b, it is possible to appropriately deal with the above-mentioned situation where inconveniences may occur if the grain culm guide 40 is in a separated position. Moreover, since the grain culm guide 40 is fixed at an intermediate position rather than at an approach position, even if non-handling work is performed with the fixing member 47 acting, the grain culm guide 40 will not obstruct the transportation of grain culms. First, even if the operator forgets to remove the fixing member 47, no inconvenience will occur.

In this embodiment, the grain culm guide 40 at an intermediate position is in a posture lying backward from the rotating shaft 40a as shown in FIG. 5, and the guide rod 403 is arranged at the same height as the rotating shaft 40a. Moreover, the first engagement pin 407 to which the tension spring 40b is engaged is located above the rotating shaft 40a, and although a tensile force is applied to pull the grain culm guide 40 toward the separated position, the grain culm Movement of the guide 40 is prevented by a fixing member 47. The intermediate position is not limited to the illustrated position, and may be any position where the grain culm 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) in which the grain culm guide 40 is fixed at an intermediate position and a non-fixed position (see FIG. 3) in which movement of the grain culm guide 40 is not hindered. has been done. As shown in FIG. 6, the fixed member 47 has a rotating shaft 47a that serves as a fulcrum for rotation, and a hook 47b that can be engaged with the grain culm guide 40. The rotating 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 attached to the frame 114.
It is rotatably supported relative to the The hook 47b engages with a rotary cylinder 413 (details of the rotary cylinder 413 will be described later) of the grain culm guide 40, but may be engaged with other parts of the grain culm guide 40. Note that, in FIG. 6, for convenience of explanation, the back plate 404 is shown transparently.

In the state shown in FIG. 6, the fixing member 47 is in the fixed position. When the operator rotates the grain culm guide 40 from the separated position toward the approach position, the rotary tube 413 also rotates together with the grain culm guide 40 in accordance with the rotational movement. The hook 47b of the fixing member 47 can be engaged with the rotating cylinder 413 at a predetermined position (midway position) between the grain culm guide 40 from the separation position to the approach position. Then, the hook 47b engages with (the rotary tube 413 of) the grain culm guide 40, thereby preventing the grain culm guide 40 from moving to the separating position or the approaching position, and fixing the grain culm guide 40 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-fixing position, and movement of the grain culm guide 40 to the separation position or the approach position is unobstructed. Become. The work of fixing the grain culm guide 40 at an intermediate position can be easily performed by simply rotating the fixing member 47 in this way. Fixed member 47
is formed of a plate material, but is not limited to this.

[Guiding member and pressing member]
Next, the guide member and the pressing member will be explained. As shown in FIG. 3, the guide member 45 includes a pedestal 45a supported by the frame 114, and a slope 45b inclined downward toward the rear.
and has. Pedestal 45a is supported by frame 114 via bracket 418. The pedestal 45a is arranged at the rear of the rotating shaft 40a. The slope 45b is the pedestal 4
5a, and extends along the conveyance direction of the feed chain 41 in plan view as shown in FIG. A lower end portion (rear end portion) 45c of the slope 45b is located above the feed chain 41.

The guide member 45 guides the grain culm to the feed chain 41 via a slope 45b. Further, the slope 45b supports the grain culm placed on the conveyance surface of the feed chain 41 so that the grain culm does not fall forward. As shown in FIG. 3, the slope 45b is
It extends in the front part of the feed chain 41 in a direction substantially perpendicular to or slightly inclined to the conveyance surface, in other words, it has a substantially V-shaped positional relationship with respect to the conveyance surface of the feed chain 41 .
By providing the guide member 45, the grain culm can be supported during manual handling work, and the grain culm can be guided to the feed chain 41 together with the grain culm guide 40. The guided grain stem passes over the pressing member 48 and is conveyed by the feed chain 41. That is, in manual handling work, the pressing member 48
does not exert the effect of pressing the grain culm against the feed chain 41.

In this embodiment, an extension member 4 is provided above the pedestal 45a so that more grain culms can be supported.
51 is attached to extend the slope 45b upward. However, a configuration without such an extension member 451 may be used. Alternatively, the guide member 45 itself may have such a shape. Although the guide member 45 is formed by bending a plate material, the guide member 45 is not limited to this.

The pressing member 48 presses grain culms conveyed by the conveying device 34 of the reaping section 3 toward the feed chain 41 during non-handling operations. The pressing member 48 is interposed between a facing part 48a facing the conveyance surface of the feed chain 41, a supporting part 48b supported relatively rotatably with respect to the bracket 49, and between the facing part 48a and the supporting part 48b. A connecting part 48c that connects both
including. The support portion 48b extends along the left-right direction. The connecting portion 48c is connected to the facing portion 48
It extends in a curved manner from a toward the support portion 48b. Although the pressing member 48 is formed by bending a rod having a circular cross section, the pressing member 48 is not limited to this, and may be formed from a plate material, for example.

The support portion 48b is inserted into a cylindrical portion 491 of a 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 supported relative to the frame 114 so as to be freely rotatable.
The facing portion 48a approaches the conveying surface of the feed chain 41 due to the weight of the pressing member 48. Therefore, the pressing member 48 during non-handling operations moves up and down depending on the volume of the supplied grain culms. This vertical movement is caused by rotation of the facing part 48a and the connecting part 4 with the supporting part 48b as a fulcrum.
Refers to the vertical movement of 8c. The upward movement of the pressing member 48, which will be described later, is also 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 edge 45e of the slope 45b. During non-handling operations, the pressing member 48 moves upward beyond the lower edge 45e due to the vibration of the combine harvester 1, the bulk of the grain culm, etc., and rises to the height shown by the chain line in FIG. 3. It is possible that When the pressing member 48 is in 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 conveyance efficiency.

Therefore, as shown in FIGS. 7 and 8, in this combine harvester 1, the lower end 45 of the slope 45b
c is formed wider than the upper end 45d of the slope 45b. This prevents the pressing member 48 from moving upward beyond the lower edge 45e of the slope 45b, and allows the pressing member 48 to appropriately press the grain culm during non-handling operations. Rather than forming the slope 45b wide as a whole, partially widening the lower end 45c in this way means that the slope 45b and the grain culm guide 40 disposed on the outside in the width direction of the machine body are in close proximity to each other. This is convenient for ensuring the distance between the

In this embodiment, the slope 45b extends with a constant width (width Wd) from the upper end 45d toward the lower end 45c, and is partially widened at the lower end 45c. Lower end 4
The width Wc of 5c is larger than the width Wd of the upper end portion 45d. The width Wc and the width Wd are each measured along the left-right direction, which is the width direction of the body. As shown in FIG. 7, the lower end portion 45c is located at a position overlapping the pressing member 48 in plan view. The lower end portion 45c gradually becomes wider downward, and becomes wider as it approaches the lower end edge 45e. In this guide member 45, a rod 45f with a circular cross section is attached to the lower edge 45e in order to prevent it from getting caught in the grain culm.
This can be omitted.

In non-handling operations, the grain culms are transported by the conveying device 34 from the inside in the width direction of the machine body to the outside, so the pressing member 48 tends to move upward through the outside of the guide member 45 in the width direction of the machine body. be. For this reason, it is preferable that the lower end portion 45c at least protrudes outward in the width direction of the body. In this embodiment, the lower end portion 45c is formed so as not to project inward in the width direction of the machine body, but only on the left side, which is the outside in the width direction of the machine body. As shown in FIG.
The outer side portion 45s in the machine body width direction at 5c is inclined downward toward the outer side in the machine body width direction. The shape of this side portion 45s is such that the pressing member 4 passes through the outside of the guide member 45 in the machine body width direction.
This is useful in preventing 8 from moving upward.

As shown in FIG. 7, the lower edge 45e is inclined rearward toward the outside in the body width direction.
Further, as shown in FIG. 8, the lower edge 45e is inclined downwardly toward the outside in the width direction of the body. With either configuration, when the pressing member 48 that is about to move upward comes into contact with the lower edge 45e, a force that moves the slope 45b outward in the width direction of the machine body and/or a force that moves the pressing member 48 in the width direction of the machine body is generated. A force to move it 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 this combine harvester 1, the lower edge 45e is inclined downwardly toward the outside in the width direction of the machine body, so when the pressing member 48 trying to move upward comes into contact with the lower edge 45e, the slope A force is applied to move 45b downward. At this time, slope 45
If b moves significantly downward, there is a risk that the lower edge 45e may get caught on the grain culm being pressed 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 to prevent such a problem from occurring.

[Handling safety device]
Next, a manual handling safety device that improves safety during manual handling work will be explained. In addition to the first switch Sw1 described above, the combine 1 includes 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 operating lever 401. The second switch Sw2 is turned on/off by the operator's pressing operation. The second switch Sw2 is always off and only turns on while being pressed by the operator. The feed chain 41 includes a first switch Sw1 and a second switch Sw
2 are turned on. This prevents the feed chain 41 from being driven against the operator's intention and improves safety.

The first switch Sw1 is switched on and off according to the operation of the operating lever 401. As shown in FIG. 6, a frame plate 4 is provided on the back plate 404 along the axial direction of the rotating shaft 40a.
A bent portion 40f is formed which is bent toward 02, and the first switch Sw1 is attached to the bent portion 40f. The button of the first switch Sw1, which is turned on by a pressing operation, penetrates the bent portion 40f and projects downward.

The operating lever 401 is relatively rotatably supported by the frame plate 402 via the operating center shaft 40c. The operating lever 401 is connected to a rotary cylinder 413 via a link mechanism 411. A pivot shaft 40d is inserted into the rotating cylinder 413 (see FIG. 4). The axis 40d is
It is sandwiched between the frame plate 402 and the back plate 404 and is integrally fixed thereto.
A pressing plate 414 is fixed to the outer peripheral surface of the rotating cylinder 413. When the operating 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 press plate 414 rotates around the pivot 40d accordingly.

When the operating lever 401 is rotated clockwise in the left side view from the approach 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 turned on. In the state where the first switch Sw1 is turned on, the operating lever 401 is
It is biased counterclockwise by the torsion coil spring 410 when viewed from the left side. The operating lever 401 rotated relative to the frame plate 402 can return to its 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 culm guide 40 from the separation position to the approach position, the operating lever 401 does not rotate around the operating center shaft 40c. be done. That is, after the grain culm guide 40 is brought to the approach position, the operation lever 401 moves the operation center shaft 40c by applying a force stronger than the force for moving the grain culm guide 40 to the approach position to the operation lever 401. Rotate around the center.

With this configuration, the operator can turn the first switch Sw1 on and off. That is, after operating the operating lever 401 to place the grain culm guide 40 in the approach position, the first switch Sw1 can be turned on by further operating the operating lever 401 toward the feed chain 41. Then, by operating the operating lever 401 so as to separate it from the feed chain 41, the first switch Sw1 can be turned off.

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

The second switch Sw2 is arranged ahead of the grain culm guide 40. Second switch S
w2 is supported by frame 114. The operator drives the feed chain 41 by pressing down the operating lever 401 with his right hand to keep the first switch Sw1 in the on state, and by pressing the second switch Sw2 with his left hand to keep the second switch Sw2 in the on state. can.

The second switch Sw2 may be arranged at the rear of the grain culm guide 40, and may be arranged, for example, on the straw presser cover 44. In that case, the operator should use the operating lever 401 with his left hand.
By pressing the second switch Sw2 with the right hand while operating , the feed chain 41 can be driven by turning on the first switch Sw1 and the second switch Sw2. Furthermore, by arranging the second switch Sw2 both in front and behind the grain culm guide 40 and arranging it so that it can be used selectively, it can be used regardless of whether the operator has a left or right hand.

By the way, if there is an oversupply of grain culms during manual handling work, the bulk of the grain culms may cause the grain culm guide 4 to
0 does not fall completely and the grain culm guide 40 does not approach the feed chain 41 sufficiently. Since the first switch Sw1 can be turned on even in such a state, it is possible to drive the feed chain 41 and perform manual handling work, but there may be problems such as the grain culm not being properly taken into the threshing section 4. may occur. Therefore, in order to avoid manual handling work in such inappropriate conditions, in this combine harvester 1, the position (rotation amount) of the grain culm guide 40 is
is detected, and predetermined control is performed based on the detection result.

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 configured by, for example, a potentiometer. The rotation angle sensor 89 has a rotatably supported lever 89a. The lever 89a is arranged at the rear of the rotating shaft 40a. The lever 89a is biased forward, and the position where it contacts the cylindrical member 405 is the limit of the forward rotation range of the lever 89a. When the grain culm guide 40 is rotated from the separation position to the approach position, the rotary tube 413 comes into contact with the lever 89a in the process, and the lever 89a is rotated to a position corresponding to the rotation angle of the grain culm guide 40. Based on the rotation angle of this lever 89a, the position (rotation amount) of the grain culm guide 40 is detected.

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

Although the present embodiment shows an example in which the operator manually operates the grain culm guide 40, the structure 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 in terms of safety to have the operator operate the device using both hands. Therefore, it is conceivable to arrange a third switch Sw3 as shown in FIG. 9, for example. The worker turns these on by pressing the second switch Sw2 with his left hand and pressing the third switch Sw3 with his right hand. In this case, the feed chain 41 is driven when the second switch Sw2 and the third switch Sw3 are turned on.

[Worker's movements during manual handling work]
Next, the actions of the worker during manual handling work will be briefly explained. The manual handling work starts with the combine harvester 1 stopped, that is, the crawler traveling device 22 and the feed chain 41 stopped.

A worker who performs manual handling work moves to a position where he can operate the grain culm guide 40 on the left side of the combine harvester 1 (hereinafter referred to as the "handling work position"), and places the harvested grain culm in a predetermined place. place This predetermined location means that when the grain culm guide 40 is rotated downward, the guide rod 40
3 refers to the area where the grain culm can be held down, and is the area formed by the slope 45b and the conveying surface of the feed chain 41. In this embodiment, since the grain culm guide 40 is in the separated position in advance by the action of the tension spring 40b, there is no need to rotate the grain culm guide 40 upward before placing the grain culm, and work efficiency is improved. .

If the reaping section 3 is raised, the above-mentioned predetermined space becomes narrow and it becomes difficult to place the grain culm, so it is preferable to carry out manual handling work with the reaping section 3 lowered. The reaping section 3 is normally configured to be able to be raised and lowered using an operating tool provided in the operating section 9. Therefore, if the operator forgets to lower the reaping section 3 and moves it to the manual handling work position with the reaping section 3 raised, the operator must move back and forth between it and the control section 9 from there. It is necessary to lower the reaping section 3, which makes the work complicated.

Therefore, in order to eliminate such inconvenience, an operating tool for raising and lowering the reaping section 3 may be arranged around the manual handling work position. For example, as in this embodiment, it is possible to install a switch 36 that can operate the raising and lowering of the reaping section 3 on the straw presser cover 44. The switch 36 is not limited to the straw presser cover 44, but may be installed on the side cover 43 or other locations. The switch 36 may be one that can only operate the lowering of the reaping section 3. Alternatively, the reaping section 3 may be configured to automatically descend when both the first switch Sw1 and the second switch Sw2 are turned on.

After placing the grain culm in a predetermined location, the operator rotates the grain culm guide 40 so as to approach the feed chain 41 and presses the grain culm. Then, from this state, the operating lever 401 is rotated toward the feed chain 41 to turn on the first switch Sw1. The operation of turning on the first switch Sw1 is performed by grasping the operation lever 401 and turning the grain culm guide 40
This is an operation of pushing down toward the feed chain 41. The operator then presses the second switch Sw2 while holding down the operating lever 401. As a result, the first switch Sw1
and the second switch Sw2 are both turned on, and the feed chain 41
is driven to perform manual handling work.

[Power transmission mechanism]
Next, with reference to FIG. 10, the power transmission mechanism of the combine harvester 1 will be described. Note that the main parts of the power transmission mechanism and the parts related to the present invention will be explained, and the explanation of other parts will be omitted.

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

The engine 8a is provided with an output pulley 181. Rotational power from the engine 8a is transmitted to the transmission 21 via a belt wound around the output pulley 181, and from the transmission 21 to the traveling section output pulley 141. The continuously variable device 23 included in the transmission 21 converts the rotational power of the engine 8a into hydraulic pressure, and then converts it back into rotational power 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 can cause the combine 1 to travel 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 first power transmission shaft 183. The other end of the first power transmission shaft 183 is housed in a power transmission case 185.

The rotational power transmitted to the traveling section output pulley 141 is transmitted to the reaping section first input pulley 142. A belt is wound between the traveling section output pulley 141 and the reaping section first input pulley 142. Further, rotational power is also transmitted from the threshing section output pulley 143 to the reaping section second input pulley 144. A belt is wound between the threshing section output pulley 143 and the reaping section second input pulley 144, and a tension clutch 145 is provided on this belt.
The first reaping section input pulley 142 and the second reaping section input pulley 144 are fixed to one end of a first reaping shaft 147 that constitutes a reaping input shaft. An auxiliary transport drive case 210 of the auxiliary transport device 135 is fixed to the other end of the first reaping shaft 147 . A bevel gear 148 is fixed to a midway portion of the first reaping shaft 147, and rotational power is transmitted to the reaping section 3 via the bevel gear 148.

During non-handling work, the tension clutch 145 is switched to the disengaged state, and power is transmitted from the traveling section output pulley 141 to the reaping section first input pulley 142. Even when the traveling section 2 is in a stopped state, the threshing section 4 is driven when only the grain culm pouring operation is performed. At this time, by switching the tension clutch 145 to the on state, power is transmitted from the threshing section output pulley 143 to the reaping section second input pulley 144.

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

The feed chain transmission device 187 includes a feed chain transmission case 201, a variable power shaft 194 passing through the feed chain transmission case 201, and a feed chain variable power shaft 194 provided outside the feed chain transmission case 201 in the machine body width direction. A belt-type continuously variable machine 208 that is a mechanism, and a variable output shaft 26 that outputs the power output from the belt-type continuously variable machine 208.
0. The belt type continuously variable machine 208 can synchronize the conveying speed by the feed chain 41 and the reaping speed by the reaping section 3 with the traveling speed of the combine harvester 1.

By transmitting rotational power between the gear provided at the other end of the first power transmission shaft 183 and the gear provided at one end of the second power transmission shaft 191, the rotational power is transferred from the first power transmission shaft 183 to the second power transmission shaft 191. Rotational power is transmitted to the shaft 191. A bevel gear 197 is located in the middle of the second power transmission shaft 191.
is fixed, and rotational power is transmitted to the threshing section output shaft 192 via the bevel gear 197. The threshing unit output shaft 192 is a shaft for transmitting rotational power to a handling cylinder and a waste straw processing 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 power shaft 194, the rotational power is transferred from the second power transmitting shaft 191 to the variable power shaft 194. Rotational power is transmitted. An input pulley 220 of a belt type continuously variable machine 208 is provided at the other end of the variable input shaft 194. The input pulley 220 connects to the output pulley 250 via a belt 290.
transmits rotational power to. 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 depending on the drive of the motor 310. When the shaft of the motor 310 is rotated in one direction (positive direction), the diameter of the belt 290 wound around the input pulley 220 increases, the groove width of the output pulley 250 becomes wider, and the belt 290 wound around the output pulley 250 becomes wider. The diameter of belt 290 becomes smaller. As a result, the belt type continuously variable machine 20
8 changes to the increasing side, and the conveying 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 290 wound around the output pulley 250 is narrowed. The diameter of the belt 290 increases. As a result, the gear ratio of the belt type continuously variable machine 208 changes to the decreasing side, and the conveying 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 rotational power is transmitted through the power transmitting sprocket 195 to a power transmitting sprocket 196 that is fitted into the variable output shaft 194 so as to be relatively rotatable. is transmitted. A gear attached to the power transmission sprocket 196 transmits power to the feed chain output shaft 199 via a power transmission mechanism 198 made up of a plurality of gears. The two power transmission sprockets 195 and 196 and the power transmission mechanism 198 are housed in a feed chain transmission case 201. A feed chain rotation sprocket 205 is provided on the feed chain output shaft 199, and the feed chain 41 can be driven by rotation of the feed chain rotation 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 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 in a slidable manner 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 electromagnetic valve 206 is provided in the oil path of the hydraulic actuator 204 . When the solenoid of solenoid valve 206 is energized, hydraulic actuator 204 extends, and when the solenoid is de-energized, hydraulic actuator 204 retracts. The extension of the hydraulic actuator 204 causes the clutch to be connected to the gear in a non-rotatable manner and switch to the connected state, and the contraction of the hydraulic actuator 204 causes the clutch to separate from the gear and switch to the disconnected state.

The solenoid valve 206 is controlled by the control device 80 and causes a pulse signal to flow through the solenoid when receiving a pulse signal from the control device 80 . The control device 80 is also connected to the engine 8a, and for example, when the power to the control device 80 is cut off, the driving of the engine 8a is also stopped. In the combine 1, when the power of the control device 80 is cut off (when the drive of the engine 8a is stopped), the hydraulic actuator 204 is extended and the feed chain stop mechanism 19
Can drive 3. Thereby, the transmission of rotational power to the feed chain 41 is cut off, and the feed chain 41 can be forcibly stopped. The feed chain stop mechanism 193 may be configured to be driven by an electric actuator instead of the hydraulic actuator.

[Control system]
Next, the control system for the combine harvester 1 will be briefly described with reference to FIG. 11. Figure 1
As shown in FIG. 1 , the hydraulic actuator 204 is connected to a control device 80 that can send control signals to the solenoid valve 206 . As described above, a hydraulic actuator 204 provided with a solenoid valve 206 is connected to the feed chain stop mechanism 193 that changes transmission or cutoff of power to the reaping section 3 . Controller 80 can control feed chain stop mechanism 193 by sending a control signal to solenoid valve 206 .

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

The control device 80 is connected to a first switch Sw1 and a second switch Sw2 that can transmit input signals to the control device 80. The control device 80 controls the 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. The feed chain 41 is driven in the cut state. Note that the control device 80 is capable of grasping the driving state of the crawler type traveling device 22, and makes the operation of the first switch Sw1 valid only when the crawler type traveling device 22 is stopped.

The control device 80 is connected to a rotation angle sensor 89, and can grasp the position (rotation amount) of the grain culm guide 40. When the control device 80 drives the feed chain 41 during manual handling work, if the position of the grain culm guide 40 is higher than a predetermined position, that is, the amount of rotation of the grain culm guide 40 is smaller than the predetermined amount of rotation. In this case, a signal is sent to the alarm device 270 to issue 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 start the feed chain 41. You can slow down.

The present invention is not limited to the embodiments described above, and various improvements and changes 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 the present invention is not limited to this.

[Additional notes]
As described above, the combine harvester according to the present embodiment is rotatable between the feed chain that conveys the grain culm to the threshing section, a remote position separated from the feed chain, and an approach position close to the feed chain. a grain culm guide, and a biasing member that biases the grain culm guide toward a separated position, and is configured such that the grain culm guide in the approach position moves to the separated position by the action of the biasing member. has been done. According to this configuration, it is possible to improve work efficiency by eliminating the trouble of moving the grain culm guide to a separated position during manual handling work.

The biasing member can selectively engage with a first engagement portion and a second engagement portion provided on the grain culm guide, and engages the biasing member with the first engagement portion. In the fitted state, the grain culm guide, which is in the approach position, moves 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, it moves to the approach position. One of the grain guides may be configured to be held in an approach position. With this configuration, by switching the engagement location of the biasing member, the grain culm guide can be held at the approach position as needed. Therefore, it is possible to appropriately deal with situations where it would be inconvenient if the grain culm guide is in a separated position, such as when a dust cover is placed over the reaping part when the combine is stored.

The grain stem guide may be provided with a fixing member that prevents the grain stem guide from moving to the separated position due to the action of the biasing member and can fix the grain stem guide at an intermediate position between the separated position and the approach position. According to this configuration, since the grain culm guide can be fixed at an intermediate position, it is possible to appropriately deal with a situation that would be inconvenient if the grain culm guide was in a separated position. In addition, by fixing the grain culm guide at an intermediate position instead of the approach position, normal threshing work can be carried out while the fixing member remains in operation (threshing the grain culm that has been harvested in the reaping section. ``Non-handling work'') Even if the grain culm guide is carried out, the grain culm guide does not obstruct the transportation of the grain culm.

It is preferable that the fixing member is configured to be rotatable between a fixed position in which the grain culm guide is fixed at an intermediate position and a non-fixed position that does not prevent the grain culm guide from moving to a separated position. . Thereby, the work of fixing the grain culm guide at an intermediate position can be easily performed.

1 Combine harvester 4 Threshing section 40 Grain culm guide 41 Feed chain 45 Guide member 45b Slope 403 Guide rod (pushing member)

Claims (3)

a feed chain that transports grain culms to a threshing section;
a grain culm guide rotatable between a remote position away from the feed chain and an approach position close to the feed chain;
a guide member that guides the grain culm to the feed chain during manual handling work together with the grain culm guide;
The guide member has a slope inclined downward toward the feed chain side,
The grain culm guide is a combine harvester located so as to intersect the slope in a side view when the grain culm guide is in the approach position. The combine harvester according to claim 1, wherein the grain culm guide is configured to be located above the guide member when in the separated position. The grain culm guide has a pressing member that presses the grain culm ,
The combine harvester according to claim 2, wherein when the grain culm guide is in the separated position, the pressing member is located on an extension line of the slope in side view.

Images