JP7159034B2 - combine - Google Patents

Description

The present invention relates to combine harvesters.

Moreover, the combine described in Patent Document 1 is equipped with a load cell that receives the load on the front side of the machine body of the grain tank. With this load cell, it is possible to measure the weight of the grain stored in the grain tank.

JP 2016-63829 A

In the combine disclosed in Patent Literature 1, it is possible to measure the weight of grains stored in the grain tank using a load cell. However, since it is a method that receives the load of the grain tank, the measurement results are greatly affected by vibration. Therefore, in order to measure the yield in the field accompanying the reaping work in real time, a method capable of measuring the yield with higher accuracy is preferable.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide means for accurately measuring the yield in a field associated with harvesting work.

The combine of the present invention is arranged between a threshing device for threshing harvested grain culms, a grain tank for storing grains obtained by the threshing device, and between the threshing device and the grain tank, a grain-raising device that conveys the grain sent out from the threshing device upward and then throws it into the grain tank through a feeding unit, wherein the feeding unit is the grain conveyed by the grain-lifting device Input amount measurement for measuring the input amount of the grain input by the grain raising device by contacting the rotary blade that rakes out the grain and input into the grain tank and the grain that is input by the rotary blade. and a sensor, wherein the input amount measuring sensor includes a load cell that receives force from the grains input by the rotating vane and deforms in a direction that intersects the vertical direction, and a receiving member with which the grains come into contact. , a posture in which the lower end of the load cell is vertically aligned with respect to the load cell support member fixed to the lower support member provided below the grain receiving port in the side wall of the grain tank The load cell supporting member is fixed by a rod-shaped member to an upper supporting member provided above the grain receiving opening in the side wall of the grain tank, and is attached to the upper end of the load cell. A member is provided.

According to this characteristic configuration, the load of the grain tank is reduced by providing the input amount measurement sensor that measures the input amount of the grains input by the grain lifting device by contacting the grains input by the rotary blade. Compared to the receiving method, it is possible to reduce the influence of vibration and accurately measure the yield in the field accompanying the reaping work. In particular, since the lower end of the load cell is fixed to the grain tank and the receiving member is provided on the other side, the load cell that is deformed in a direction crossing the vertical direction is easily deformed. As a result, the size of the receiving member can be reduced, and the influence of vibration on measurement results can be further reduced.
In addition, the size of the receiving member can be reduced, further reducing the influence of vibration on measurement results.
In addition, since the load cell can be reliably supported by the rod-shaped member connected to the upper support member and the lower support member, the accuracy of measuring the amount of grain input can be further improved. In addition, since the rod-shaped member is rod-shaped, it becomes difficult for the grains thrown in by the rotating blades to come into contact with the member, and uneven distribution of the grains thrown into the grain tank can be further suppressed.

In the present invention, the input unit includes a guide member for regulating the throwing direction of the grains input by the grain raising device, and the guide member comprises the rotating blade of the grain lifting device and the input amount measuring sensor. The input part is provided in the middle part in the front-rear direction of the side wall extending in the front-rear direction of the grain tank, and the end part in the left-right direction of the receiving member It is preferable that the end of the guide member farther from the threshing device is positioned closer to the threshing device in the left-right direction than the end of the guide member farther from the threshing device in the left-right direction.

According to this configuration, it is possible to increase the number of grains in contact with the guide member while reducing the number of grains in contact with the receiving member. It is possible to suppress unevenness of the input grains.

In the present invention, the end portion of the guide member in the left-right direction farther from the threshing device is the end portion of the left-right direction farther from the threshing device in the rotation area of the rotary blade. Rather, it is preferable to be positioned on the side of the threshing device in the left-right direction.

According to this configuration, not all of the grains thrown in by the rotating blades contact the guide member, but some of the grains are thrown into the grain tank without contacting the guide member. The scattering directions of the grains are diversified, and it is possible to further suppress uneven distribution of the grains fed into the grain tank.

In the present invention, the input portion includes an outer peripheral wall that covers a part of the rotation area of the rotating blade from the outside, and is between the end of the outer peripheral wall on the side where the receiving member is located and the receiving member. Preferably, there is provided a discharge space through which the grains fed by the rotating blades can pass.

According to this configuration, since the grains thrown in by the rotating blades can pass through the discharge space between the outer peripheral wall and the receiving member, the scattering directions of the grains thrown in from the rotating blades are diversified. It is possible to further suppress uneven distribution of grains fed into the grain tank.

In the present invention, it is preferable to provide a support adjustment mechanism that supports the input amount measuring sensor and is capable of adjusting the distance between the rotating blade and the receiving member.

According to this configuration, it is possible to adjust the distance between the rotary blade and the receiving member to an appropriate one, and improve the measurement accuracy of the input amount of grains.

It is the whole combine side view. It is the whole combine top view. It is a side view of an injection|throwing-in part. It is a cross-sectional plan view of an injection|throwing-in part. It is a front view of an injection|throwing-in part. It is a perspective view of an injection|throwing-in part. It is a top view of the grain tank which shows a grain input state. It is a side view of the injection|throwing-in part of a 2nd injection|throwing-in state. It is a cross-sectional plan view of the injection|throwing-in part of a 2nd injection|throwing-in state.

EMBODIMENT OF THE INVENTION Hereafter, the case where embodiment of the combine which concerns on this invention is applied to a self-threshing combine is described based on drawing.

〔overall structure〕
As shown in Figs. A threshing device 4 and a grain tank 5 for storing grains are arranged in the rear part of the machine body in the lateral direction of the machine body. A boarding operation section 7 covered with a cabin 6 is provided on the right front portion of the traveling body 2 , and an engine 8 for driving is provided below the boarding operation section 7 . A screw conveyor type grain discharging device 9 for discharging the grains stored in the grain tank 5 to the outside is provided at the rear part of the machine body.

In this embodiment, when defining the longitudinal direction of the aircraft, it is defined along the traveling direction of the aircraft in the working state, and when defining the horizontal direction of the aircraft, left and right are defined when viewed in the traveling direction of the aircraft. . 1 and 2 is the front side of the fuselage, and the direction indicated by the code (B) in FIGS. 1 and 2 is the rear side of the fuselage. The direction indicated by the symbol (L) in FIG. 2 is the left side of the fuselage, and the direction indicated by the symbol (R) in FIG. 2 is the right side of the fuselage.

The reaping and conveying unit 3 includes a plurality of raising devices 10 for raising the lodged planted culms, a clipper-type reaper 11 for cutting the roots of the raised planted culms, and a vertical posture cutting device 11 for cutting the roots of the raised planted culms. A grain culm conveying device 12 or the like is provided for conveying the harvested culms toward the threshing device 4 located on the rear side of the machine body while gradually changing the attitude of the harvested culms to a sideways posture.

Although not shown, the threshing device 4 nips the base of the harvested grain culm by a threshing feed chain (not shown) and transports it backward, while threshing the tip side of the harvested grain culm in an internal threshing chamber, and sorting section. , sorting is performed on the threshed product, and the threshed product is sorted into grains, secondary products such as grains with branches, and dust such as fine straw waste. The grain is stored in the grain tank 5, the second grain is returned to the handling chamber, and the dust is discharged outward from the rear end portion.

The grain obtained by the threshing process by the threshing device 4 is conveyed from the threshing device 4 to the grain tank 5 by the grain conveying mechanism 13 . The grain conveying mechanism 13 includes a first grain collecting screw 14 located at the bottom of the threshing device 4 and a grain lifting device 15 . The grains laterally fed by the first grain recovery screw 14 and delivered laterally outward from the side wall of the threshing device 4 are conveyed upward by the grain lifting device 15 . The grain-lifting device 15 conveys the grains upward and then feeds the grains into the grain tank 5 via the feeding portion 16 .

Although not described in detail, the grain tank 5 is supported by the fuselage so as to be able to swing about the vertical axis on the rear side of the fuselage, and is projected laterally outward from the normal working posture shown by the solid line in FIG. can be switched between the maintenance posture and the maintenance posture shown by the virtual line. By switching to the maintenance posture, it is possible to perform maintenance work on the engine 8 arranged below the boarding operation section 7 and various parts around it.

A recessed portion 18 recessed laterally inward in a plan view is formed at a location corresponding to the grain lifting device 15 in the left side wall portion 5A of the grain tank 5 . A grain lifting device 15 is provided so as to be inserted into the recessed portion 18 . The grain raising device 15 is configured as a screw conveyor type having a vertical feeding screw 20 inside a cylindrical conveying tube 19 .

[Construction of input part]
The input unit 16 inputs the grain transported upward by the grain lifting device 15 into the grain tank 5 . As shown in FIGS. 1 and 7 , the charging portion 16 is provided at the center of the left side wall portion 5A of the grain tank 5 in the longitudinal direction of the machine body. In other words, the input portion 16 is provided at an intermediate portion in the front-rear direction of the side wall portion 5A extending in the front-rear direction of the grain tank 5 .

The input unit 16 has a rotating blade 27 that rakes out the grains conveyed by the vertical feed screw 20 of the grain lifting device 15 and loads them into the grain tank 5, and a throwing direction of the grains that are input by the grain lifting device 15. and an input amount measuring sensor 22 for measuring the input amount of the grains input by the grain raising device 15 by the contact of the input grains by the rotating blades 27 .

A discharging part 23 is provided at a location corresponding to the charging part 16 in the upper end part of the grain raising device 15 . A large grain receiving port 24 is formed at a portion of the grain tank 5 corresponding to the input portion 16 .

When the grain tank 5 is in the normal working posture, the grain lifting device 15 enters the recessed portion 18 of the grain tank 5, and the discharging portion 23 of the grain lifting device 15 faces the grain receiving port 24. Connected. Then, the grain raising device 15 can discharge the grains from the upper portion of the grain tank 5 into the grain tank 5 through the discharge port 23 a and the grain receiving port 24 provided in the discharge portion 23 .

When the grain tank 5 is in the maintenance posture, the grain tank 5 swings laterally outward and is separated from the grain lifting device 15 . Therefore, the grain receiving port 24 of the grain tank 5 and the discharging portion 23 of the grain lifting device 15 are connected so as to be easily separable. When the grain tank 5 is switched from the maintenance posture to the normal work posture, the discharge part 23 of the grain lifting device 15 does not block the grain receiving port 24 and a gap is formed at the periphery of the grain receiving port 24. A rubber sealing member such as, for example, a weatherstrip is provided.

The discharge part 23 includes a rotary blade 27 provided at the upper end of the shaft 26 of the vertical feed screw 20, and a rotary blade 27 that covers the periphery of the rotary blade 27 and is opened toward the inside of the grain tank 5. A discharge section structure 28 having an outlet 23a formed thereon, and a guide member 21 for regulating the throwing direction of the thrown grains are provided. The rotating vane 27 is driven to rotate clockwise together with the vertical feed screw 20 when viewed from above.

The discharging part structure 28 is connected to the upper end of the conveying tube 19 and forms the lower end surface of the discharging port 23a. The outer peripheral wall 30 that covers the outer peripheral wall 30 and the top plate 31 that forms the upper end face of the discharge port 23a in a state of being continuous with the upper end of the outer peripheral wall 30 are main constituent members, and they are integrally connected by welding or the like.

In addition, the discharge portion forming body 28 includes vertically oriented blocking plates 32 positioned on both sides in the circumferential direction of the outer peripheral wall 30 and extending to both sides in the circumferential direction from the discharge port 23a, and vertically facing opposed plates 32 positioned on the lower surface side of the bottom plate 29. A member 33 is provided. When the grain tank 5 is in the normal working posture, the vertical blocking plate 32 covers the open portion of the grain receiving port 24 . The facing member 33 is provided so as to face the side wall portion 5A around the grain receiving port 24 in the grain tank 5 . The vertical closing plate 32 and the facing member 33 are integrally connected to the bottom plate 29 and the top plate 31 by welding or the like. A bearing portion 34 that supports the shaft 26 of the vertical feed screw 20 is provided on the upper portion of the top plate 31 .

The guide member 21 includes a pedestal portion 21a fixed to the back surface side (lower surface side) of the bottom plate 29 by bolt connection, and a guide action portion 21b in a vertical posture. The guide action part 21b is provided so as to act on the grains to be thrown in a part of the full width of the throwing part 16 in the vertical direction. A grain guiding surface 21c with an oblique right-rearward posture for restricting the throwing direction so that the grains are directed obliquely to the right-rearward side at a portion of the guiding action portion 21b located on the downstream side in the rotation direction of the rotary blade 27. is provided. A portion of the guiding action portion 21b located on the upper side in the rotation direction of the rotary vane 27 is connected to the vertically oriented closing plate 32 of the discharge portion forming body 28 by bolts.

A liner member 38 is attached to the inner surface of the outer peripheral wall 30 to receive and guide the grains ejected by the rotating blades 27 . The liner member 38 is attached to the outer peripheral wall 30 by fastening a plurality of bolts. By removing a plurality of bolts, the liner member 38 can be removed and replaced.

The liner member 38 is provided so as to cover the inner surface of the outer peripheral wall 30 over the entire width in the axial direction (vertical direction) and the entire circumference in the circumferential direction. The liner member 38 extends along the inner surface of the guide member 21 toward the downstream side in the rotation direction of the rotary vanes 27 from a portion corresponding to the outer peripheral wall 30 in the lower region of the discharge port 23a. It is extended and formed in a continuous state. That is, the liner member 38 is provided on the grain guide surface 21 c of the guide member 21 .
Specifically, as shown in FIG. 5, the liner member 38 includes an upstream portion 38a, which is an upstream portion in the rotational direction of the rotating blades 27 of the grain raising device 15, and a downstream portion of the rotating blades 27 in the rotating direction. and a downstream portion 38b. The downstream portion 38b has a smaller vertical length than the upstream portion 38a. As shown in FIG. 4, the downstream portion 38b is arranged at a position overlapping a grain receiving surface 39a (described later) of the receiving member 39 of the input amount measuring sensor 22 when viewed from the rotating shaft of the rotary vane 27. As shown in FIG.

A detection rotator 35 that rotates integrally with the shaft 26 of the vertical feed screw 20, a rotation angle sensor that detects the rotation state of the detection rotator 35, and the like are provided above the top plate 31 of the discharge section structure 28. ing. The detection rotator 35 is formed in a substantially rhombic shape in a plan view, and is provided so that the apex farther from the center of rotation (this apex constitutes the detected portion 35a) passes the rotation angle sensor in a state of being close to it. ing. The rotation angle sensor is supported by the top plate 31 and configured to output a detection pulse each time the detected portion 35a of the detection rotor 35 approaches.

As shown in FIGS. 3 to 6, the charging amount measuring sensor 22 is arranged adjacent to the outlet 23a of the discharging section 23 in the charging section 16. As shown in FIGS. The input amount measuring sensor 22 is supported by a support adjustment mechanism 42 .

The input amount measuring sensor 22 includes a receiving member 39 formed in a flat plate shape and having a flat grain receiving surface 39a, a load cell 40 capable of measuring the force acting on the receiving member 39, and an upper end portion of the receiving member 39 and the load cell 40. are provided with a spacer 41 or the like that connects them with a space therebetween. The load cell 40 is arranged with its longitudinal direction extending in the up-down direction.

As shown in FIG. 3 , the vertical length of the grain receiving surface 39 a of the receiving member 39 is greater than the vertical length of the grain guiding surface 21 c of the guide member 21 .

Since the receiving member 39 is connected to the upper end of the load cell 40 and the lower end of the load cell 40 is supported by the support adjustment mechanism 42 in a fixed state, stress tends to concentrate on the central portion of the load cell 40 . That is, when the load cell 40 receives a load from the receiving member 39, a moment load is applied to the other end portion, and the load cell 40 is deformed in the front-rear direction (an example of "a direction intersecting the vertical direction"), and distortion occurs in the central portion. An electrical signal is generated from the load cell 40 by the strain occurring in the center of the load cell 40 . An electrical signal generated from the load cell 40 is used as a detection signal for evaluating the grain yield, and the electrical signal is represented by, for example, a voltage value or a current value.

The load cell 40 can detect the pressing force applied to the receiving member 39 when the grain is discharged from the discharge port 23 a by the rotating blade 27 and contacts the receiving member 39 . As the amount of grains discharged from the grain lifting device 15 increases, the pressing force of the grains against the receiving member 39 increases, and the detection signal of the load cell 40 also increases. As a result, the input amount of grains can be measured based on the detection signal of the load cell 40 .

A brief description will be given of the processing for measuring the input amount of grains.
A control device (not shown) to which detection signals from the rotation angle sensor and the load cell 40 are input is provided. The control device can obtain the input amount of grains by arithmetic processing based on those detection signals.

When the rotating blade 27 passes near the receiving member 39, the greatest force is applied to the receiving member 39, and the peak value of the detection signal of the load cell 40 is detected. This peak value is detected each time the rotary blade 27 rotates once. The control device can time-series measure the input amount per unit time from the peak value of the detection signal of the load cell 40 detected for each rotation of the grain raising device 15 . By accumulating the values, the grain yield in the field can be obtained.

[Configuration of support adjustment mechanism]
The support adjustment mechanism 42 includes a support stay 43 , a load cell support member 44 and a bar member 45 .

The support stay 43 is a U-shaped member when viewed from above. The support stay 43 is attached to the lower support member 5B provided on the side wall portion 5A of the grain tank 5 with a bolt B through an elongated hole 43a provided in the bottom of the U shape. That is, the support stay 43 is attached to the lower support member 5B so as to be movable in the left-right direction.

The load cell support member 44 is a U-shaped member when viewed from above. The load cell support member 44 is attached to the support stay 43 in such a posture that its U-shape faces the U-shape of the support stay 43 . Specifically, the right side plate of the load cell support member 44 is attached to the right side plate of the support stay 43 via a long hole 43b provided in the right side plate of the support stay 43 . The left side plate of the load cell support member 44 is attached to the left side plate of the support stay 43 via an elongated hole provided in the side plate. That is, the load cell support member 44 is attached to the load cell support member 44 so as to be movable in the front-rear direction. The lower end of load cell 40 is attached to the U-shaped bottom of load cell support member 44 .

The rod-shaped member 45 is a round-bar-shaped member. The upper end of the rod-shaped member 45 is attached to the upper support member 5C provided on the side wall 5A of the grain tank 5 via the long hole 45b of the upper stay 45a. That is, the rod-shaped member 45 is attached to the upper support member 5C so as to be movable in the left-right direction. A lower end portion of the rod-shaped member 45 is attached to the stay 44b via a lower stay 45c and an elongated hole 44c of the stay 44b standing forward from the load cell support member 44. As shown in FIG. That is, the load cell support member 44 is attached to the bar member 45 so as to be movable in the front-rear direction. The rod-shaped member 45 supports the load cell 40 with its lower end while straddling the load cell 40 .

By configuring the support adjustment mechanism 42 as described above, the positions of the load cell 40 and the receiving member 39 in the front-rear direction and the left-right direction can be adjusted. That is, the support adjustment mechanism 42 is configured to support the input amount measurement sensor 22 and adjust the distance between the rotating blade 27 and the receiving member 39 .

[Injection of grain into the grain tank]
The grains conveyed upward by the grain raising device 15 are discharged into the grain tank 5 by the rotating blades 27 while being guided along the outer peripheral wall 30 of the charging portion 16 . In the lower region of the discharge port 23a where the guide member 21 is provided, the grains are guided by the grain guide surface 21c of the guide member 21, and as shown by the dashed line in FIG. 5 is guided obliquely to the rear right.

On the other hand, in the upper region of the discharge port 23a where the guide member 21 is not provided, the grains are moved forward and backward in the grain tank 5 as indicated by the one-dot chain line and the two-dot chain line in FIG. Emission guided in a wide range.

As shown in FIG. 3, the upper end of the grain receiving surface 39a of the receiving member 39 is positioned above the upper end of the grain guiding surface 21c of the guide member 21. As shown in FIG. Therefore, the grains passing above the guide member 21 come into contact with the receiving member 39 of the input amount measuring sensor 22, and the scattering direction changes. As shown in FIG. 4, the normal direction of the grain guiding surface 21c of the guide member 21 and the normal direction of the grain receiving surface 39a of the input amount measuring sensor 22 are different. Therefore, the grains contacting the grain guiding surface 21c of the guide member 21 and the grains contacting the grain receiving surface 39a of the input amount measuring sensor 22 scatter in different directions. Therefore, the unevenness of the grains thrown into the grain tank 5 by the rotating blades 27 is suppressed.

In this embodiment, as shown in FIG. 4 , the right end 39 b (the end far from the threshing device 4 ) of the left and right ends of the receiving member 39 is the left and right end of the guide member 21 . It is located on the left side (on the side of the threshing device 4) in the left-right direction from the right end 21d (the end farther from the threshing device 4). As a result, the number of grains in contact with the receiving member 39 can be reduced while the number of grains in contact with the guide member 21 can be increased. It is possible to suppress the bias of the grains that are put into.

In this embodiment, as shown in FIG. 4, the right end 21d (the end far from the threshing device 4) of the left and right ends of the guide member 21 is the rotation area 27a of the rotary blade 27. It is located on the left side (the side of the threshing device 4) in the left and right direction from the right end 27b (the end far from the threshing device 4) among the ends in the left and right direction. As a result, not all the grains thrown in by the rotating blades 27 come into contact with the guide member 21, but some grains do not come into contact with the guide member 21 and are thrown into the grain tank 5. The scattered direction of the grains to be fed into the grain tank 5 is diversified, and the bias of the grains fed into the grain tank 5 can be further suppressed.

Further, in this embodiment, as shown in FIG. 4, the end portion 30a (the end portion on the side where the receiving member 39 is positioned) of the outer peripheral wall 30 and the receiving member 39 are separated from each other. A discharge space S is formed. The grains from the rotating blades 27 are thrown into the grain tank 5 through the discharging space S. As a result, as shown in FIG. 7, grains from the rotary vane 27 pass through the discharge space S and are thrown into the grain tank 5 obliquely to the left. Therefore, the direction in which the grains thrown from the rotary vanes 27 scatter can be diversified, and the unevenness of the grains thrown into the grain tank 5 can be further suppressed.

A storage amount detection sensor 50 for detecting that the storage amount of grains has reached a set amount is supported on the right side plate portion of the support stay 43 . In this embodiment, the storage amount detection sensor is attached directly to the support stay 43 without using a height adjustment mechanism or the like, thereby realizing a simple structure with a reduced number of parts. The storage amount detection sensor 50 is composed of a pressure-sensitive switch, and when the grains are stored up to the position where the storage amount detection sensor 50 is located, and pressure is applied by the grains, the switch is turned on to enter the grain detection state. It is configured to switch. The output signal of this storage amount detection sensor 50 is input to the control device.

When grains are stored in the grain tank 5 to such an extent that the storage amount detection sensor 50 is in the grain detection state, the stored grains come into contact with the receiving member 39 of the input amount measurement sensor 22 and are detected by the load cell 40. The signal may not reflect the grain input. In this embodiment, when the storage amount detection sensor 50 enters the grain detection state, the control device stops the arithmetic processing for determining the amount of grain input based on the detection signal of the load cell 40 . Note that when the storage amount detection sensor 50 enters the grain detection state, a notification process such as displaying a warning on a display panel (not shown) provided in the boarding operation unit 7 or emitting an alarm sound is performed. The controller may be configured to do so.

[Other embodiments]
[1] In the above embodiment, an example in which the charging portion 16 is provided with the charging amount measuring sensor 22 has been described. The input unit 16 can be switched between a first input state (FIGS. 3-6) in which the input amount measurement sensor 22 is attached and a second input state (FIGS. 8-9) in which the input amount measurement sensor 22 is removed. may be configured.

When the input unit 16 is in the second input state, the grains conveyed upward by the grain-lifting device 15 are guided along the outer peripheral wall 30 of the input unit 16 as in the first input state, while being guided by the rotating blades. 27 into the interior of the grain tank 5 . In the lower region of the discharge port 23a where the guide member 21 is provided, the grains are guided by the grain guide surface 21c of the guide member 21, and as shown by the dashed line in FIG. 5 is guided obliquely to the rear right.

On the other hand, in the upper region of the discharge port 23a where the guide member 21 is not provided, the grains are moved forward and backward in the grain tank 5 as indicated by the one-dot chain line and the two-dot chain line in FIG. Emission guided in a wide range. In the second input state, since the input amount measuring sensor 22 is not provided, the grains passing above the guide member 21 are guided to be discharged forward of the grain tank 5 without contacting the input amount measuring sensor 22. be done. Therefore, the unevenness of the grains thrown into the grain tank 5 by the rotating blades 27 is suppressed.

[2] In the above-described embodiment, the liner member 38 is provided along the entire circumference of the outer peripheral wall 30 . .

[3] In the above-described embodiment, the guide member 21 regulates the throwing direction so that the grains are oriented obliquely rearward. It may be something to do.

[4] In the above embodiment, the lower end of the load cell 40 is fixed to the grain tank 5 via the support adjustment mechanism 42, and the upper end of the load cell 40 is provided with the receiving member 39.
An upside down arrangement, that is, the upper end of the load cell 40 may be fixed to the grain tank 5 and the receiving member 39 may be provided at the lower end of the load cell 40 .

[5] In the above embodiment, an example in which the rod-shaped member 45 is a round-bar-shaped member has been described. The rod-shaped member 45 may be a round pipe, a square pipe, or a solid round bar or square bar.

The present invention can be applied not only to a self-threshing combine harvester but also to a normal combine harvester in which all harvested culms of grain culms are fed into a threshing device.

4: Threshing device 5: Grain tank 5A: Side wall portion 5B: Lower side support member 5C: Upper side support member 15: Grain raising device 16: Input portion 21: Guide member 21b: Guide action portion 21c: Grain guide surface 21d: End 22 : Input amount measurement sensor 27 : Rotating blade 27a : Rotation region 27b : End 30 : Outer peripheral wall 30a : End 39 : Receiving member 39a : Grain receiving surface 39b : End 40 : Load cell 42 : Support adjustment mechanism 45: Rod-shaped member S: Release space

Claims (5)

a threshing device for threshing harvested grain culms;
a grain tank for storing grains obtained by the threshing device;
a grain lifting device disposed between the threshing device and the grain tank, conveying the grain sent from the threshing device upward and then charging the grain into the grain tank via a charging portion; prepared,
The input unit is a rotary blade that scrapes out the grains conveyed by the grain-lifting device and loads them into the grain tank. and an input amount measurement sensor that measures the amount of input grains,
The input amount measurement sensor includes a load cell that deforms in a direction that intersects the vertical direction by receiving force from the grains input by the rotating blades, and a receiving member that contacts the grains,
The lower end of the load cell is fixed to the load cell support member fixed to the lower support member provided below the grain receiving port in the side wall portion of the grain tank in a posture in which the longitudinal direction is along the vertical direction. fixed,
The load cell support member is fixed to an upper support member provided above the grain receiving port in the side wall portion of the grain tank by a rod-shaped member,
A combine harvester in which the receiving member is provided at the upper end of the load cell. The input unit includes a guide member that regulates the throwing direction of the grains input by the grain lifting device,
The guide member is arranged between the rotating blade of the grain raising device and the receiving member of the input amount measuring sensor,
The input portion is provided at an intermediate portion in the front-rear direction of a side wall extending in the front-rear direction of the grain tank,
Of the left-right ends of the receiving member, the end farther from the threshing device is located in the left-right direction than the end of the guide member farther from the threshing device. A combine according to claim 1, located on the equipment side. Of the left-right direction ends of the guide member, the end farther from the threshing device is positioned further left and right than the left-right end of the rotation area of the rotary blade farther from the threshing device. 3. A combine according to claim 2, which is located on the side of the threshing device in the direction. The input part has an outer peripheral wall that covers a part of the rotating area of the rotating blade from the outside,
4. A discharge space through which the grains fed by the rotating blades can pass is provided between the end of the outer peripheral wall on the side where the receiving member is located and the receiving member. A combine according to any one of claims 1 to 3. The combine according to any one of claims 1 to 4, further comprising a support adjustment mechanism that supports the input amount measuring sensor and is capable of adjusting the distance between the rotating blade and the receiving member.

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