JP2005160345A - Grain unloading apparatus for combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grain unloading apparatus with which an auger at its tip side is neither extended nor bent relatively to an auger at its base side when not stored in an auger rest. <P>SOLUTION: This grain unloading apparatus 15 for taking out grains in a grain tank 13 comprises a longitudinal unloading auger 17 and a horizontal unloading auger 30. In a combine harvester rotatably equipped with the horizontal unloading auger above the grain tank, the horizontal unloading auger is composed of the auger 31 at the base side and the auger 33 at the tip side bendably connected through a pivot shaft 33 to the auger at the base side. The connection part between the auger at the tip side and the auger at the base side is equipped with a driving mechanism 50 for bending or extending the auger at the tip side. The driving mechanism and a detection means 27 for detecting the storage position of the horizontal unloading auger are connected to a control means 61 and the driving mechanism is operated only when the horizontal unloading auger is in the storage position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a configuration of a grain discharging device that discharges grain stored in a grain tank of a combine to the outside, and particularly relates to a technique that enables a discharge auger of a grain discharging device to be folded and stored by an actuator.

  Conventionally, in a combine, a harvested grain is stored in a grain tank, and a grain discharging device is provided to discharge the grain in the grain tank. The grain discharge device is composed of a vertical discharge auger and a horizontal discharge auger with a screw installed therein, a discharge conveyor is disposed at the lower part in the Glen tank, and the lower end of the vertical discharge auger is connected to the rear end of the discharge conveyor, One end of the horizontal discharge auger is connected to the upper end of the vertical discharge auger. A technique is known in which the lateral discharge auger is divided into a front and a rear auger and is configured to be foldable by being configured to be foldable (for example, Patent Documents). 1).

JP 11-275944 A

  The conventional combine grain discharging device is rotated by a drive mechanism provided at the base of the distal end side auger and extended or refracted with respect to the proximal end auger, so that the lateral discharge auger is cut during cutting or traveling on the road In the contracted state, when the grain discharging operation is performed, it can be switched to the extended state.

  Since such a distal auger is configured to be rotatable at an arbitrary swiveling position of the horizontal discharge auger, when the horizontal discharge auger is not placed on the auger rest (storage position), the distal auger is the base end. If the side auger is refracted or extended, the tip side auger may interfere with the surroundings such as the Glen tank and the driver's seat, and the tip side auger and Glen tank may be damaged.

  Therefore, an object of the present invention is to provide a grain discharging device in which the distal auger does not extend or refract with respect to the proximal auger when not stored in the auger rest.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

  That is, in claim 1, in the combine provided with a grain discharge device that takes out the grain in the grain tank from a vertical discharge auger and a horizontal discharge auger, the horizontal discharge auger being pivotable above the grain tank, The horizontal discharge auger is composed of a proximal auger and a distal auger that is refractably coupled to the proximal auger via a pivot shaft, and the distal side is connected to the distal auger and the proximal auger. A drive mechanism for bending or extending the auger is provided, the drive mechanism and a detecting means for detecting the storage position of the lateral discharge auger are connected to the control means, and the drive mechanism is operated only when the horizontal discharge auger is in the storage position. Operable.

  According to a second aspect of the present invention, in the combine provided with a grain discharge auger and a horizontal discharge auger for taking out the grain in the grain tank, the horizontal discharge auger is provided so as to be pivotable above the grain tank. The auger is composed of a proximal auger and a distal auger that is connected to the proximal auger via a pivot shaft so as to be able to bend, and the distal auger is connected to the connecting portion between the distal auger and the proximal auger. Provided with a drive mechanism that refracts or extends, and provides an operation means for the drive mechanism in the vicinity of the connecting portion between the distal end auger and the proximal end auger so that the operation means cannot be operated when the distal end auger is locked in the extended state. It is a thing.

  According to a third aspect of the present invention, a lock operation means for locking the distal end side auger in an extended state is provided immediately above the operation means.

  According to a fourth aspect of the present invention, the drive arm protruding from the drive mechanism and the tip side auger are connected by a detachable connecting member.

  As effects of the present invention, the following effects can be obtained.

  In the first aspect, when the auger rest is not housed, the distal end side auger can be prevented from extending or refracting with respect to the proximal end side auger. Therefore, when the distal auger is rotated to extend or contract the lateral discharge auger, the distal auger can be prevented from coming into contact with or being damaged by the surroundings such as the glen tank. The operability can be improved.

  According to the second aspect of the present invention, when the lateral discharge auger is locked in the extended state, the operation means cannot be operated. Therefore, the operation means is erroneously bent while the horizontal discharge auger is locked in the extended state. The failure of the drive mechanism is prevented.

  According to a third aspect of the present invention, when the distal discharge auger is locked to the proximal end side in the extended state, the upper part of the operation means is covered with the lock operation means. Therefore, it becomes impossible to operate the operation means, and thus erroneous operation can be prevented.

  According to the fourth aspect of the present invention, the connection between the drive mechanism and the tip side auger can be released by removing the shaft body. Therefore, even when a malfunction occurs in the drive mechanism, the distal end auger can be manually rotated to bend or extend relative to the proximal end auger.

Next, embodiments of the invention will be described.
FIG. 1 is a side view showing the overall structure of a combine according to an embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 shows a connecting portion between a proximal auger and a distal auger during expansion. 4 is a plan view, FIG. 5 is a plan view showing a connecting portion between the proximal auger and the distal auger during refraction, FIG. 6 is a side sectional view of the drive mechanism, and FIG. FIG. 8 is a block circuit diagram, FIG. 9 is a plan view of the connecting portion between the proximal auger and the distal auger in the second embodiment, and FIG. 10 is a side sectional view of the connecting portion between the end auger and the distal auger. FIG. 11 is a plan view of the connecting portion between the proximal end auger and the distal end side auger in the fourth embodiment, and FIG. 12 is another embodiment. FIG. 13 is a front view of an augerest according to another embodiment.

First, the whole structure of the combine which concerns on this invention is demonstrated using FIG. 1, FIG.
An airframe frame 2 is placed on the crawler type traveling device 1, and a lifting / reaping device 3 is disposed at the front end of the airframe frame 2 so as to be movable up and down. The pulling / reaping device 3 projects a weed plate 4 at the front end to weed the grain straw, raises the case 5 at the rear thereof, and raises the case 5 to rotate the tine 6 protruding from the case 5. A wrinkle is caused, and the stock of the cereal is harvested by the cutting blade 7 disposed at the rear part of the weed plate 4.

  The harvested cereals are conveyed backward by the lower conveying device 8a, the upper conveying device 8b, and the vertical conveying device 8c, and the stock is inherited by the feed chain 9 from the upper end of the vertical conveying device 8c. Conveyed in. A waste chain 10 is disposed at the rear end of the feed chain 9, and a waste treatment unit 11 including a waste cutter device and a diffusion conveyor is formed below the rear part of the waste chain 10 to cut the waste. After being made into cocoon pieces, they are released uniformly into the field while being diffused or released without being cut.

  A sorting unit is disposed below the threshing unit 12, and the grain is sorted from the grains and sawdust flowing down from the threshing unit 12, and transported to the grain tank 13 for storing the sorted grain, or sawdust. Etc. are discharged outside the machine.

  The Glen tank 13 is disposed on the side of the threshing portion 12. A driver's seat 14 is disposed in front of the grain tank 13, and a vertical discharge auger 17 of a grain discharging device 15 is erected in the rear of the grain tank 13, and the grain is centered on the vertical discharge auger 17. The tank 13 can be turned to the side to facilitate maintenance of a drive system and a hydraulic system disposed on the inside of the machine.

  A discharge conveyor (not shown) is disposed at the bottom of the grain tank 13 in the front-rear direction. Power is transmitted from the discharge conveyor to the grain discharge device 15, so that the discharge provided in the grain discharge device 15 is transmitted. The grain in the Glen tank 13 can be discharged from the outlet 19 to the outside.

  The grain discharging device 15 is mainly composed of a vertical discharging auger 17 that vertically communicates grains with a lower end communicating with a discharging conveyor, and a horizontal discharging auger that communicates with the upper ends of the vertical discharging auger 17 and laterally feeds the grains. 30, the base end side of the horizontal discharge auger 30 is pivotally attached to the upper end of the vertical discharge auger 17 erected on the rear side of the Glen tank 13 so as to be vertically rotatable.

  An auger elevating cylinder 20 is interposed between the vertical discharge auger 17 and the horizontal discharge auger 30, and one end of the auger elevating cylinder 20 is provided on a bracket 21 protruding from the outer peripheral side of the upper end of the vertical discharge auger 17. The other end is pivotally attached to a bracket projecting from the outer peripheral side portion of the base end portion of the lateral discharge auger 30. By extending and retracting the auger elevating cylinder 20, the horizontal discharge auger 17 is rotated in the vertical direction.

  A spur gear 23 is externally fitted and fixed to the vertical middle part of the vertical discharge auger 17, and a spur gear 25 fitted on the rotating shaft of the auger turning motor 24 is engaged with the spur gear 23. By driving the auger turning motor 24, the horizontal discharge auger 30 can be integrally turned left and right around the vertical discharge auger 17.

  An augerest 26 is disposed behind the driver's seat 14. The auger rest 26 is a member that supports the horizontal discharge auger 30 in the storage position when the grain discharge device 15 is not used, and the horizontal discharge auger 30 is attached to a rest portion formed in a substantially U shape in front view of the auger rest 26. It can be supported. A switch 27 serving as a means for detecting that the lateral discharge auger 30 is not in the working position but in the storage position is provided at a portion where the auger rest 26 contacts the horizontal discharge auger 30. However, the means for detecting the storage position is not limited to the switch, and may be a proximity sensor or the like.

  The storage position of the horizontal discharge auger 30 here is a position where the horizontal discharge auger 30 is stopped when the horizontal discharge auger 30 is not used, such as during traveling. As shown in FIG. 2, the horizontal discharge auger 30 is positioned on the auger rest 26, and the auger lifting cylinder 20 is actually shortened from the state in which the horizontal discharge auger 30 is positioned on the auger rest 26 in plan view. Then, the horizontal discharge auger 30 is rotated downward, and the horizontal discharge auger 30 is placed on the auger rest 26. The working position of the horizontal discharge auger means that the horizontal discharge auger 30 is stopped at an arbitrary position when the horizontal discharge auger 30 is used, such as transferring the grains stored in the grain tank 13 to the truck bed. It is a position and refers to a state that is not located on the augerest 26.

Hereinafter, the horizontal discharge auger 30 will be described with reference to FIGS. 3 to 8.
The horizontal discharge auger 30 includes a proximal end auger 31 connected to the upper end of the vertical discharge auger 17 and a distal end auger connected to the proximal end auger 31 via a pivot shaft 33 so as to be capable of being bent (broken). 32, and a flange 34 formed on the outer periphery on the distal end side of the proximal end side auger 31 and a flange 35 formed on the outer periphery on the proximal end side of the distal end side auger 32 are combined and connected. Yes.

  Support stays 36 and 37 projecting to the side (left side) are fixed to the upper and lower portions of the outer periphery on the distal end side of the proximal auger 31, and the pivot shaft 33 is attached to the distal ends of the upper and lower support stays 36 and 37. Is supported rotatably via a bearing. In addition, arms 38 and 39 projecting in the same direction as the support stays 36 and 37 are formed on the upper and lower portions of the outer periphery on the proximal end side of the distal auger 32, and the distal ends of the upper and lower arms 38 and 39 are formed in the upper and lower portions. It is disposed between the support stays 36 and 37 and is pivotally supported on the pivot shaft 33. Thereby, the distal end side auger 32 and the proximal end side auger 31 are rotatably connected, and the distal end side auger 32 can be refracted or extended with respect to the proximal end side auger 31. Thus, when the lateral discharge auger 30 is not used, the distal auger 32 is refracted with respect to the proximal auger 31 to be in a contracted state, and when used, the distal auger 32 is expanded with respect to the proximal auger 31 in an expanded state. It can be.

  As shown in FIG. 7, the base end side auger 31 and the distal end side auger 32 are internally provided with screw-type discharge conveyors 41 and 42, respectively. Among these discharge conveyors 41 and 42, the base end side of the discharge conveyor 41 on the base end side is interlocked and connected to the upper end of a discharge conveyor (not shown) built in the vertical discharge auger 17, and the inside of the Glen tank 13 The power is transmitted from the discharge conveyor and driven. On the other hand, the proximal end side of the discharge conveyor 42 of the distal end side auger 32 is driven by being interlocked with the distal end side of the discharge conveyor 41 of the proximal end side auger 31.

  A bearing cylinder 44 is disposed at the center of the proximal end side inner periphery of the distal end auger 32 via a bracket 43, and a bearing 45 is attached to the bearing cylinder 44. And the fitting shaft 46 formed in the shaft base end part of the discharge conveyor 42 of the front end side auger 32 is rotatably supported by the bearing 45. A plurality of protrusions 46 a protruding in the radial direction from the shaft core are provided on the outer periphery of the fitting shaft 46.

  Further, a support cylinder case 48 is provided at the center of the distal end side auger 31 via a bracket 47, and the shaft part of the discharge conveyor 41 of the proximal end auger 31 is provided in the support cylinder case 48. A front receiving shaft 49 is rotatably supported. The front end portion of the receiving shaft 49 is formed in a cylindrical shape to fit the fitting shaft 46, and further, a fitting recess 49a for fitting the protrusion 46a is formed.

  Thus, when the distal end auger 32 is extended by rotating about the pivot shaft 33 with respect to the proximal end auger 31 and the lateral discharge auger 30 is in the expanded state, The protrusion 46a formed on the fitting shaft 46 of the distal end side auger 32 is fitted to the formed fitting recess 49a, and the discharge conveyor 41 of the distal end side auger 32 is interlocked with the discharge conveyor 42 of the proximal end side auger 31. Is done. Thereby, the power transmitted from the discharge conveyor (not shown) of the vertical discharge auger 17 to the discharge conveyor 41 of the base end side auger 31 is transmitted to the discharge conveyor 42 of the distal end side auger 32, and the discharge conveyor 41. 42 rotates together.

  As shown in FIGS. 5 to 7, the proximal auger 31 and the distal auger 32 are connected to the proximal auger 31 by rotating the distal auger 32 about the pivot shaft 33. A drive mechanism 50 is provided for refraction or extension. The drive mechanism 50 includes a rotation actuator and a drive body attached to the proximal end auger, a follower attached to the distal end auger, and the like. In this embodiment, a motor 51 is used as a rotation actuator, a worm 52 is used as a drive body, and a worm wheel 53 is used as a follower. The worm 52 and the worm wheel 53 are provided in a drive case 54. The motor 51 is fixed to the head.

  The drive case 54 is disposed and supported between the upper and lower support stays 36 and 37 of the base end side auger 31, and pivots on a pivot shaft 33 that connects the tip end side auger 32 and the base end side auger 31. It is supported. In the drive case 54, the worm 52 is interlocked and connected to an output shaft protruding from the motor 51, and a worm wheel 53 is fixed to the upper and lower central portions of the pivot shaft 33 so that the worm 52 and the worm wheel 53 are fixed. Are engaged.

  Further, one end of a drive arm 55 is fixed to the upper end of the pivot shaft 33, and the other end of the drive arm 55 is connected to a support stay 56 fixed to the outer peripheral portion of the distal end side auger 32. The connecting member is configured to be detachable as a shaft, and the shaft is configured by a connecting pin 57 and pivotally supports the drive arm 55 and the support stay 56. The connecting pin 57 is detachably fitted in a hole 55a provided in the drive arm 55 and a hole provided in the support stay 56, and is supported by the drive arm 55 by removing the connecting pin 57 from the hole 55a. The connection with the stay 56, that is, the distal end side auger 32 can be released. Therefore, when the motor 51 of the drive mechanism breaks down or a malfunction such as biting occurs in the drive case 54, the distal auger 32 can be manually refracted or extended by releasing this connection. .

  As shown in FIGS. 4 and 5, a support stay 59 is fixed to the outer peripheral side of the distal end side of the auger 31 on the side opposite to the drive mechanism 50 with respect to the auger axis of the drive case 54, On the support stay 59, a manual changeover switch 60 serving as an operation means of the drive mechanism 50 is disposed. That is, the operating means for switching the horizontal discharge auger 30 between the extended state and the contracted state is disposed on the side surface of the base end side auger 31 on the driver seat side in a state where the horizontal discharge auger 30 is placed on the auger rest 26.

  The manual changeover switch 60 is constituted by a seesaw type switch, and as shown in FIG. 8, is connected to the motor 51 via a control means 61, and by operating one side of the manual changeover switch 60, The motor 51 is driven to rotate forward so that the distal auger 32 is refracted with respect to the proximal auger 31 and the other side is operated so that the motor 51 can be driven in reverse to extend the proximal auger 31. I have to. The manual changeover switch 60 is operated by pressing the motor 51 by pressing it once. When the bending position or the extension position is reached, the detection switches 63 and 64 for detecting the refraction position or the extension position are turned on to turn the motor 51 off. Although it is configured to stop, the motor 51 can be configured to be driven only when it is pressed.

  The control means 61 is connected to a switch 27 which is means for detecting that the lateral discharge auger 30 is in the storage position. As a means for detecting that the horizontal discharge auger 30 is in the storage position, for example, an auger turning angle sensor 28 (see FIG. 1) provided coaxially with the spur gear 25 of the vertical discharge auger 17 may be used. . The auger turning angle sensor 28 includes a resolver, a rotary potentiometer, a rotary encoder, and the like, and can detect the turning angle of the vertical discharge auger 17, that is, the turning angle of the horizontal discharge auger 30.

  With this configuration, only when it is detected that the switch 27 is turned on and the lateral discharge auger 30 is in the storage position, the control means 61 uses the manual changeover switch 60 (or an automatic changeover switch 62 described later). The drive mechanism 50 can be operated. In other words, only when the lateral discharge auger 30 is in the storage position, the distal auger 32 can be rotated to bend or extend relative to the proximal auger 31. Therefore, when the horizontal discharge auger 30 is in the working position, the driving mechanism 50 is not driven even if the manual changeover switch 60 or the automatic changeover switch 62 is operated. Can be prevented, and safety can be improved.

  In the above configuration, when the manual changeover switch 60 is used to switch between the extended state and the contracted state of the horizontal discharge auger 30, when the manual changeover switch 60 is operated, first, the switch 27 first determines whether the horizontal discharge auger 30 is in the storage position. It is confirmed. Here, if it is determined that the lateral discharge auger 30 is in the working position without being placed on the auger rest 26, the drive mechanism 50 does not operate.

  On the other hand, when it is determined that the lateral discharge auger 30 is placed on the auger rest 26 and is in the retracted position, the drive mechanism 50 operates. When one side of the seesaw type manual changeover switch 60 is pushed while the horizontal discharge auger 30 is extended, the motor 51 is driven and the worm wheel 53 rotates counterclockwise in FIG. The distal auger 32 is rotated in the same direction around the pivot shaft 33 and is refracted with respect to the proximal auger 31 as shown in FIG. When the leading end auger 32 reaches the bending position and the bending position detection switch 63 is turned on by the leading end auger 32, the driving of the motor 51 is stopped and the lateral discharge auger 30 is held in the contracted state.

  If the other side of the manual changeover switch 60 is pushed while the lateral discharge auger 30 is in the contracted state, the worm wheel 53 is rotated in the clockwise direction in FIG. 5, and the distal end side auger 32 is centered on the pivot shaft 33. As shown in FIG. 4 and extends with respect to the proximal end auger 31. When the distal auger 32 reaches the extended position and the extended position detection switch 64 of the distal auger 32 is turned on, the driving of the motor 51 is stopped and the lateral discharge auger 30 is held in the extended state.

  And when rotating the front end side auger 32 between the bending position and the extended position, the rotation speed of the front end side auger 32 is gradually increased from the start of rotation, and is rotated at a constant speed. As it approaches the end, it gradually slows down and stops. Specifically, a timer 65 is connected to the control means 61, or it counts up by an internal clock from the start of driving and increases until a predetermined time elapses from the start. When a predetermined time approaching the terminal end elapses after driving, the motor is decelerated and stopped at the refraction position or the extension position. That is, since the time for rotationally driving the distal auger 32 between the bending position and the extended position by the motor 51 is substantially determined, the speed is gradually increased from the start of driving to a predetermined time by PWM control or the like. Accelerate until Then, after driving at the rated speed, when the predetermined time has passed and the end is approached, the rotational speed is gradually reduced to stop at the refraction position or the extension position. However, the driving speed of the driving motor 51 is not controlled by a timer, but the turning position of the distal auger 32 is detected by using the auger turning angle sensor 28 (see FIG. 1), etc. Within a predetermined angle, the speed can be increased at the start of driving, and the speed can be decreased before stopping.

  Further, when a trouble occurs in the motor 51 or the control circuit and the distal end auger 32 cannot be rotated by the drive mechanism 50, the distal end auger 32 is manually rotated to switch the state of the lateral discharge auger 30. I can also do that. That is, the connecting pin 57 that connects the drive arm 55 fixed to the upper end of the pivot shaft 33 and the support stay 56 of the distal auger 32 is removed from the hole 55a of the drive arm 55, and the drive arm 55 and the distal auger are removed. By releasing the connection with 32, the distal auger can be manually rotated.

Next, a lock mechanism 66 for securely holding the distal end side auger 32 in the extended position will be described with reference to FIGS.
A lock lever 70 is arranged in parallel to the axial direction of the proximal end auger 31 on the opposite side of the drive mechanism 50 with respect to the auger shaft core of the connecting portion between the proximal end auger 31 and the distal end side auger 32. . One side (base side) of the lock lever 70 is slidably inserted into a through hole formed in the support member 71, and a screw part is formed at one end of the lock lever 70, and the screw part Nuts 72 and 73 are screwed together. A compression spring 74 is interposed on the screw portion between the nut 73 and the support member 71 via a washer.

  The support member 71 is pivotally supported by a support shaft 77 projecting laterally from the base end side outer peripheral side portion of the distal end side auger 32, and the lock lever 70 is supported by the support shaft 77 through the support member 71. It is comprised so that it may rotate centering on. A stopper is provided on the side surface of the distal end side auger 32 of the support member 71 to regulate the maximum amount of rotation.

  An engaging member 75 having an engaging recess 75a projects downward from an intermediate portion in the axial direction of the lock lever 70. Further, a roller 76 is rotatably supported on the outer peripheral side of the distal end side of the base end side auger 31 to reduce the resistance at the time of engagement, and the engagement recess 75a of the engagement member 75 can be engaged with the roller 76. Is arranged. When the roller 76 and the engaging recess 75a are engaged, the lock lever 70 slides against the urging force of the spring 74, and the engagement is maintained in the engaged (locked) state. The spring 74 is biased. A gripping portion 70a is formed at the other end of the lock lever.

  In such a configuration, when the distal auger 32 is rotated and reaches the extended position as described above, the lock lever 70 is rotated counterclockwise as shown in FIG. The engaging recess 75 a of the provided engaging member 75 is engaged with the roller 76. At this time, the engaging recess 75a is urged toward the roller 76 by the urging force of the spring 74, and the state is maintained so that the lock lever 70 is not easily detached. Note that the shape of the engagement recess 75a is made to match the outer shape of the roller 76, and the lock lever 70 slides against the support member 71 against the spring 74 when locking and unlocking.

  Further, when the distal auger 32 is locked at the extended position by the lock lever 70, the lock lever 70 is disposed directly above the manual changeover switch 60. That is, the manual changeover switch 60 for switching the distal end side auger 32 to the extended position or the refractive position is disposed on the side surface of the proximal end side auger 31, and the lock lever 70 when locked is also disposed on the side surface of the proximal end side auger 31. The lock lever 70 is positioned close to the upper surface of the operation unit of the changeover switch 60. Specifically, the shaft portion between the grip portion 70a of the lock lever 70 and the engaging member 75 is disposed so as to be close to the operation portion of the manual changeover switch 60 when locked.

  Therefore, at the time of locking, even if the manual changeover switch 60 is to be operated, the lock lever 70 becomes an obstacle and the manual changeover switch 60 cannot be operated. This is because when the horizontal discharge auger 30 is extended and locked by the lock lever 70, the manual changeover switch 60 is erroneously operated to drive the motor 51, forcibly drive the motor to overheat, gears, etc. Is prevented from being damaged.

Next, a lock mechanism 67 for securely holding the distal end side auger at the bending position will be described with reference to FIG.
A support stay 81 protrudes laterally and is fixed to an outer peripheral side portion opposite to the lock lever 70 and the auger axis in the middle of the distal end side auger 32, and the support stay 81 extends in the vertical direction. A pivot shaft 82 is fixed, and a middle portion of the lock lever 83 is pivotally supported on the pivot shaft 82. The lock lever 83 is biased by a spring provided on the pivot shaft 82 so as to rotate counterclockwise (engaged) in FIG.

  The lock lever 83 is configured in a substantially J shape in plan view, and a gripping portion 83 a is formed at one end portion, and is arranged in parallel with the distal end side auger 32. On the other hand, an engagement recess 83 b is formed at the other end of the lock lever 83. In addition, a support frame 84 that protrudes toward the engaging recess 83b of the distal end side auger 32 is fixedly provided on the outer peripheral side portion of the middle portion of the proximal end side auger 31 with the distal end side auger 32 in the bending position. ing. The support frame 84 is formed in a “U” shape in a plan view, and an engagement pin 85 is provided in the vertical direction at the tip of the support frame 84, and the engagement recess 83 b of the lock lever 83 is engaged with the engagement pin 85. Is possible.

  In such a configuration, as described above, the abutting portion 83c of the lock lever 83 abuts on the engaging pin 85 at a position immediately before reaching the refracting position by turning so as to refract the distal auger 32, and the lock lever 83 is pushed against the biasing force of the spring by the engaging pin 85, and is gradually rotated about the pivot shaft 82 in the clockwise direction in FIG. When the distal auger 32 reaches the bending position, the distal end of the lock lever 83 is disengaged from the engagement pin 85 and is rotated counterclockwise in FIG. 5 by the urging force of the spring. The recess 83b engages with the engagement pin 85. Thus, the distal auger 32 is automatically locked to the proximal auger 31 by the lock lever 83 during refraction. Therefore, the distal end side auger 32 can be reliably held at the bending position without operating the lock lever 83. In this state, the lock lever 83 can be resisted against the spring, and the lock can be released by rotating the lock lever 83 about the pivot shaft 82 in the clockwise direction in FIG.

  However, the configuration may be such that only the guide is disposed without the lock levers 70 and 83. That is, since the tip side auger 32 can be bent and extended by engaging the worm 52 and the worm wheel 53 and driving the worm 52 to rotate, the tip side auger 32 does not rotate even when no driving force is applied. . However, it is preferable to fix the worm 52 and the worm wheel 53 because the worm 52 and the worm wheel 53 may be damaged due to excessive force applied to the distal auger 32 or vibration during running or the like. In this case, it is also possible to provide a lock detection means in the vicinity of the lock levers 70 and 83 so that an alarm is issued when an extension or refraction operation is performed in the locked state.

  Further, an automatic changeover switch 62 for switching the lateral discharge auger 30 between the extended state and the contracted state can be provided in the vicinity of the driver seat 14. That is, it is possible to switch between the extended state and the contracted state by the switch operation while sitting on the driver's seat 14 without approaching the lateral discharge auger 30. As shown in FIG. 8, the automatic changeover switch 62 is connected to the control means 61. The control means 61 is connected to the motor 51, the refraction position detection switch 63, and the extension position detection switch 64, and the refraction position detection switch 63 or The bending state of the distal end side auger 32 is detected by ON / OFF of the extension position detection switch 64, and the driving of the motor 51 is stopped when the distal end side auger 32 reaches the bending position or the extended position. . As shown in FIG. 9, the refraction position detection switch 63 is arranged like a refraction position detection switch 107 arranged on the side surface of the proximal end auger 91, and the extension position detection switch 64 is similarly arranged at the distal end of the proximal end auger 91. It is arranged like the extension position detection switch 108 arranged in the section.

  The refraction position detection switch 63 of the distal auger 32 is disposed on the outer peripheral side of the proximal auger 31 or the rotation base (near the pivot shaft 33), and as shown in FIG. It is connected to the. The refraction position detection switch 63 is turned on when the front end auger 32 rotates to reach the refraction position, and detects that the front end auger 32 is in the refraction position.

  The extension position detection switch 64 of the distal end side auger 32 is disposed at the distal end portion or the rotation base portion (near the pivot shaft 33) of the proximal end side auger 31, and is connected to the control means 61 as shown in FIG. ing. The extension position detection switch 64 is turned on when the distal end auger 32 rotates to reach the extended position, and detects that the distal end auger 32 is in the extended position.

  When the automatic switch 62 is operated, the motor 51 is driven, and the lateral discharge auger 30 can be switched from the extended position to the refracted position, or from the refracted position to the extended position, but when the automatic switch 62 is turned on. Then, whether or not the lateral discharge auger 30 is in the storage position is confirmed (determined) by the storage position detection means (switch 27). Here, if it is determined that the lateral discharge auger 30 is not placed on the auger rest 26 and is in the working position, the drive mechanism 50 is not operated. Therefore, when the lateral discharge auger 30 is in a working position where it is not placed on the auger rest 26, when the leading end auger 32 rotates, it hits the Glen tank or abuts against other obstacles and is damaged. Although there is a possibility, accidents and the like can be prevented.

  Further, when the manual changeover switch 60 is operated, the drive mechanism 50 can be operated regardless of the position of the distal end side auger 32. However, the automatic changeover switch 62 can be operated from the extended position to the refracted position or only by pushing. It is designed to rotate from the refraction position to the extension position. That is, since the manual changeover switch 60 is provided on the proximal end side auger 31 of the horizontal discharge auger 30, it is operated in a state in which the state of the horizontal discharge auger 30 is grasped, that is, in a state of view. It is possible to stop and operate at the position. However, since the automatic changeover switch 62 is operated while sitting on the seat, there is no need to stop it halfway.

  Further, when the refraction position detection switch 63 is ON (or the extension position detection switch 64 is ON), it is driven by pushing either the expansion side or the refraction side of the operation part of the manual changeover switch 60 constituted by a seesaw type switch. The mechanism 50 can also be configured such that the distal auger 32 extends (or refracts) relative to the proximal auger 31.

  Further, when the manual changeover switch 60 or the automatic changeover switch 62 is operated during the rotation of the distal end side auger 32, it is possible to stop it halfway. In this case, there is an obstacle in the middle of the rotation. Sometimes damage can be avoided in advance.

Next, a description will be given of a second embodiment of the drive mechanism that refracts or extends the distal end side auger relative to the proximal end auger.
As shown in FIG. 9, a support stay 93 is fixed to the outer peripheral portion on the distal end side of the proximal end side auger 91, and a pivot shaft 94 is pivotally supported on the support stay 93. An arm 95 is fixed to the outer peripheral portion of the side, a pivot shaft 94 is fixed to the arm 95, and the distal auger 92 can be rotated with respect to the proximal auger 91 about the pivot shaft 94. It is said.

  A drive mechanism 96 that rotates the distal end side auger 92 relative to the proximal end side auger 91 is fixed to a motor 97 disposed on the distal end side outer peripheral portion of the proximal end side auger 91 and an output shaft of the motor 97. A flat gear 98 as a driven body, a flat gear 99 as a driven body fixed to a pivot shaft 94 connecting the base end side auger 91 and the distal end side auger 92, and the like. And the spur gear 99 are meshed with each other. In this way, when the motor 97 is driven forward or backward and the spur gear 99 is rotated, the distal auger 92 is rotated relative to the proximal auger 91 about the pivot shaft 94.

  Locking mechanisms 101 and 102 are provided on the outer peripheral portion on the distal end side of the proximal end auger 91. The lock mechanisms 101 and 102 are provided with operation levers 103 and 104, respectively. The locking mechanism 101 is for locking the distal end auger 92 at the bending position, and is provided in the middle of the proximal end auger 91. By rotating the operating lever 103 to the left in FIG. The locking portion is locked by being locked, and can be unlocked by rotating to the right.

  The locking mechanism 102 is for locking the distal end side auger 92 in the extended position, and is provided at the rotating base portion at the distal end of the proximal end side auger 91. A leaf spring 105 is projected from the operating lever 104, and the plate The tip of the spring 105 is disposed so as to face the flat gear 99. In this way, the distal end side auger 92 is locked by fitting the distal end portion of the leaf spring 105 to the tooth portion of the flat gear 99 at the locked position.

  Further, as shown in FIG. 9, a forward rotation switch 109 is provided as a detection means at the motor ON position operated on the opposite side (right side) to the lock position of the operation lever 103. A reversing switch 110 is arranged as a detecting means at the motor ON position operated on the opposite side (left side) to the lock position of the operation lever 104, and the lock position and the motor ON position of the operation lever 103 and the operation lever 104 are reversed left and right. It is set as follows. The forward switch 109 and the reverse switch 110 are connected to the motor 97 via the control means 106 so that the motor 97 can be driven. Although the operation levers 103 and 104 are configured as separate bodies, they may be configured as a single unit and connected to the engagement member or the leaf spring 105 via a link or the like.

  In such a configuration, when the distal end auger 92 is in the bending position and the operating lever 103 is operated to the locked position to lock the distal end auger 92 to the extended position from the locked state on the proximal end auger 91. When the operation lever 103 is rotated from the locked position to the unlocked position and further to the motor ON position, the forward rotation switch 109 is turned on and the motor 97 is driven to rotate and extend the distal end side auger 92. be able to.

  Thus, when the distal auger 92 rotates and reaches the extended position, the extended position detection switch 108 is turned on and the motor 97 is stopped. Then, the leaf spring 105 is swung by operating the operation lever 104 to the lock position, and the distal end portion of the leaf spring 105 is fitted to the flat gear 99, so that the distal end side auger 92 is at the proximal end side in the extended position. The auger 91 can be locked.

  In this state, when the front end auger 92 is rotated to the bending position, the motor 97 is driven in reverse by operating the operation lever 104 from the lock position to the lock release position, and further to the reverse switch ON position. The side auger 92 can be rotated and refracted. When the distal auger 92 rotates to the refraction position, the refraction position detection switch 107 is turned on to stop the driving of the motor 97. In this state, the distal end auger 92 can be locked at the bending position by rotating the operation lever 103 to the locking position.

A third embodiment of the drive mechanism that refracts or extends the distal auger relative to the proximal auger will be described.
As shown in FIG. 10, the proximal auger 121 and the distal auger 122 are connected via a pivot shaft 123. A support shaft 124 is rotatably supported on the outer peripheral portion of the proximal end side auger 121, and a support shaft 125 is rotatably supported on the outer peripheral portion of the proximal end side auger 122. A support shaft 124 of the auger 121 and a support shaft 125 of the distal auger 122 are connected by a damper rod 126. The damper rod 126 has a thrust in the direction of the shortest state.

  In such a configuration, the damper rod interposed between the distal end side auger 122 and the proximal end side auger 121 when the distal end auger 122 is rotated from the extended position and refracted with respect to the proximal end auger 121. 126 exceeds the pivot shaft 123 serving as a rotation fulcrum, and can be urged and held by the damper rod 126 at the refraction position. Conversely, when the distal end side auger 122 is rotated from the bending position and extended with respect to the proximal end side auger 121, the distal end side auger 122 is held at the extended position by the damper rod 126 being urged beyond the fulcrum. .

  In this way, it is possible to hold the distal auger 122 in the bent or extended position using the damper rod 126. In addition, when the distal auger 122 is rotated, the damper rod 126 can prevent a sudden rotation due to the weight of the distal auger 122, so that safety can be improved. This configuration is suitable for a case where manual expansion / refraction operation is performed as in the embodiments of FIGS.

A description will be given of a fourth embodiment of a mechanism for bending or extending the distal auger with respect to the proximal auger.
As shown in FIG. 11, a guide 133 is provided on the outer peripheral portion on the distal end side of the proximal end auger 131, and a guide groove 133 a is opened in the guide 133 in parallel to the axial direction of the proximal end auger 131. A pin 134 is slidably engaged with the guide groove 133a, and one end of an arm 135 is connected to the tip of the pin 134.

  Further, a support shaft 136 is rotatably supported on the outer peripheral portion on the proximal end side of the distal end side auger 132. The other end of the arm 135 is fixed to the distal end of the support shaft 136, and the proximal end auger 131 and the distal end auger 132 are connected via the arm 135. However, two arms 135 can be provided in parallel in the vertical direction so that they can be stably supported.

  A guide rail 137 is attached to the outer peripheral side of the distal end side auger 131 along the axial direction of the proximal end auger 131 so that the roller 138 can be fitted back and forth. The roller 138 is disposed on the side opposite to the guide rail 137 and pivotally supported on the proximal end side outer peripheral portion of the distal end side auger 132.

  In addition, a lock lever 139 is pivotally supported on the side opposite to the guide rail 137 in the outer peripheral side of the distal end side of the proximal end side auger 131, that is, on the same side as the roller 138. The lock lever 139 engages with the roller 138 to lock the distal auger 132 when the distal auger 132 is in the extended position.

  In such a configuration, when the front end auger 132 is moved from the extended position to the contracted position, after the lock by the lock lever 139 is released, the front end auger 132 is moved sideways so that the roller 138 matches the guide rail 137. After shifting, the distal side auger 132 can be positioned and supported on the guide rail 137 via the roller 138 by moving to the proximal end side and fitting the roller 138 into the guide rail 137. In this way, as shown in FIG. 11B, the distal auger 132 is guided and moved rearward, so that it can be held at the contracted position.

  Conversely, when the distal auger 132 is moved from the retracted position to the extended position, the distal auger 132 is moved to the distal end side while being guided by the roller 138, and the roller 138 is removed from the guide rail 137 and then the proximal end side. By shifting so as to coincide with the auger 131 and locking with the lock lever 139, the distal auger 132 can be held in the extended position as shown in FIG. The distal auger 132 can be moved manually or by using a motor or the like.

  Therefore, when the distal auger 132 is moved, it is not necessary to rotate as in the above embodiment, so that the distal auger 131 can be prevented from coming into contact with surrounding objects. Further, in the state where the distal auger 132 is in the contracted position, the distal end of the distal auger 132 is not positioned near the vertical discharge auger 17, so the cover 12 a (see FIG. 2) covering the threshing portion 12 is attached to the distal auger 132. It can be opened without interfering with the tip. Therefore, it is possible to improve the maintainability.

Next, another embodiment of the auger rest 26 on which the lateral discharge auger 30 is placed will be described.
As shown in FIG. 12, the augerest 140 is mainly composed of a rest part 140a and a column part 140b. The rest portion 140a is formed in a substantially U shape when viewed from the front, and is fixed to the upper end of the column portion 140b so that the horizontal discharge auger 30 can be placed on the upper surface thereof. In addition, a guide 143 is provided on a frame 142 that supports a grain tank, a threshing portion, or the like, or extends from the body frame, and the column portion 140b is slidably inserted into a guide hole 143a formed by the guide 143. Has been.

  A rack (tooth portion) 144 is provided in the vertical direction below the support column 140b, and the rack 144 and a pinion 146 connected to the output shaft of the motor 145 are engaged with each other. The motor 145 is connected to a switch disposed in the driver's seat 14 and the like, and can be driven forward and backward by operating the switch. Therefore, by driving the motor 145, the auger rest 140 can be slid in the vertical direction while being guided by the guide 143, and the vertical inclination angle of the horizontal discharge auger 30 at the storage position can be adjusted.

  In addition, as shown in FIG. 13, the auger rest 150 may be configured to be slidable in the vertical direction using a hydraulic cylinder instead of the motor 145. In this case, the hydraulic cylinder 152 is housed in a cylindrical guide 151 attached to the Glen tank frame 154, and the column portion 150 b of the auger rest 150 is inserted and connected to one end of the hydraulic cylinder 152. The auger rest 140 can be slid in the vertical direction along the guide 151 by extending and contracting the hydraulic cylinder 152, and the vertical inclination angle of the horizontal discharge auger placed on the rest portion 150a can be adjusted. it can.

  With the above configuration, when the proximal auger 31 is placed on the auger rest 140 (or 150) and the distal auger 32 is rotated to switch from the extended position to the refractive position, the lock is applied. Is released and the augerest 140 (or 150) is raised. At this time, the horizontal discharge auger 30 is in a state in which the vertical discharge auger 17 side is lowered, and the gravity of the tip side auger 32 itself generates a component force that rotates backward, and the tip side auger 32 is operated small by using the gravity. It can be rotated by a load. On the other hand, when the tip side auger 32 is switched from the refracting position to the extended position, the tip side auger 32 side is inclined by lowering the auger rest 140 (or 150), so that the gravity of the tip side auger 32 itself is reduced. Generates a component force that rotates forward, and can be rotated with a small operation load.

  Further, when the tip side auger 32 is switched to the bending position, the auger rests 140 and 150 are kept raised so that the grains remaining in the lateral discharge auger 30 are spilled to the outside during traveling. Can be prevented.

The side view which showed the whole structure of the combine which concerns on one Example of this invention. FIG. The side view which shows the connection part of the base end side auger at the time of expansion | extension, and a front end side auger. FIG. The top view which shows the connection part of the base end side auger and the front end side auger at the time of refraction. Side surface sectional drawing of a drive mechanism. Side surface sectional drawing of the connection part of the base end side auger and the front end side auger at the time of expansion | extension. Block circuit diagram. The top view of the connection part of the base end side auger in the 2nd Example and a front end side auger. The top view of the connection part of the base end side auger and front end side auger in a 3rd Example. The top view of the connection part of the base end side auger and front end side auger in 4th Example. The front view of the augerest of another Example. The front view of the augerest of another Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 13 Glen tank 15 Grain discharge apparatus 17 Longitudinal discharge auger 27 Switch 30 Lateral discharge auger 31 Base end side auger 32 Front end side auger 33 Pivot shaft 50 Drive mechanism 60 Manual changeover switch 61 Control means 62 Automatic changeover switch 70 Lock lever

Claims (4)

  A grain discharge device for taking out grains from the grain tank is composed of a vertical discharge auger and a horizontal discharge auger, and the horizontal discharge auger is provided with the horizontal discharge auger so as to be pivotable above the grain tank. And a driving mechanism that refracts or extends the distal end auger at the connecting portion between the distal end auger and the proximal end auger. The drive mechanism and a detecting means for detecting the storage position of the horizontal discharge auger are connected to the control means, and the drive mechanism can be operated only when the horizontal discharge auger is in the storage position. Combine grain discharging device.   A grain discharge device for taking out grains from the grain tank is composed of a vertical discharge auger and a horizontal discharge auger, and the horizontal discharge auger is provided with the horizontal discharge auger so as to be pivotable above the grain tank. And a driving mechanism that refracts or extends the distal end auger at the connecting portion between the distal end auger and the proximal end auger. And an operating means of the drive mechanism is provided in the vicinity of the connecting portion between the distal end side auger and the proximal end side auger, and the operating means cannot be operated when the distal end side auger is locked in the extended state. Combine grain discharging device.   3. The combine grain discharging apparatus according to claim 2, wherein a lock operating means for locking the distal auger in an extended state is provided immediately above the operating means. The combine grain discharging apparatus according to any one of claims 1 to 3, wherein the driving arm protruding from the driving mechanism and the tip side auger are connected by a detachable connecting member.