Harvesting Machine

Abstract

To provide a harvester capable of reducing the labor of an operator to operate a storage part into an open state, even when crops are stored in the storage part, in the harvester.SOLUTION: A harvester comprises a storage part 6 which is supported by a machine frame 12 so that the storage part can be changed in a state, between a closed state A1 where the storage part is provided above a machine frame 12 and harvested crops can be stored in the storage part, and an open state where the storage part is protruded outward in a lateral side from the machine frame 12, around a first shaft core along a vertical direction on the machine frame 12. The harvester further comprises: a support part 37 which is provided on lower parts 6a, 6b of the storage part 6; and a guide part 36 which supports the storage part 6 by mounting the support part 37 thereon, and can guide the support part 37 from the closed state A1 to the open state side; and a lifting mechanism 45 which lifts up the support part 37 from the guide part 36.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a configuration of a storage section capable of storing harvested crops in a harvester that harvests crops in a farm field. [Background technology]

[0002] As disclosed in Patent Document 1, a normal combine harvester, which is an example of a harvester, is provided with a storage section capable of storing harvested crops. The storage section is supported by the machine frame so that its state can be changed around an axis that runs vertically at the rear of the storage section, and the storage section can be operated between a closed state on the machine frame and an open state in which it protrudes laterally outward from the machine frame. By operating the storage section into the open state, an operator can perform maintenance work near the storage section.

[0003] In Patent Document 1, the support part is provided under the front part of the storage part, and the guide part is provided on the machine frame. By placing the support part on the guide part, the front part of the storage part is supported by the guide part, and the support part is guided from the closed state toward the open state. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-21962 A Summary of the Invention [Problem to be solved by the invention]

[0005] When crops are stored in the storage section, the weight of the storage section becomes heavy, so when the storage section is operated to the open state, it is preferable that the storage section is in an empty state in which no crops are stored. In recent years, there has been an increasing demand for operating the storage section to the open state even when crops are stored in the storage section.

[0006] An object of the present invention is to provide a configuration for a harvester that reduces the effort required by an operator to open a storage section even when crops are stored in the storage section. [Means for solving the problem]

[0007] The harvester of the present invention includes a machine frame, a storage section supported by the machine frame so as to be changeable about a first axis along the up-down direction of the machine frame between a closed state in which the storage section is located on the machine frame and capable of storing harvested crops, and an open state in which the storage section protrudes laterally outward from the machine frame, a support section provided under the storage section, and a storage section on which the support section is placed to support the storage section. do A guide portion is provided, and a lifting mechanism is provided that can lift the support portion from the guide portion. The support portion moves integrally with the storage portion as the state of the storage portion changes, and the guide portion is provided below a path along which the support portion moves when the state of the storage portion changes. is.

[0008] When the storage section is supported by the guide section via the support section and the storage section is operated to the closed state, if crops are stored in the storage section, the loading pressure on the support section becomes large, and it becomes difficult for the worker to operate the storage section to the open state. According to the present invention, the support part is lifted by the lifting mechanism, thereby reducing the loading pressure on the support part. Therefore, even when crops are stored in the storage part, the effort required by the operator to operate the storage part to the open state is reduced, thereby improving the operability of the storage part to the open state.

[0009] In the present invention, it is preferable that when the storage section is operated to the closed state, an entry section into which the support section descends is provided in the guide section, and the support section is lifted out of the entry section by the lifting mechanism.

[0010] According to the present invention, when the storage section is operated to the closed state, the support section descends and enters the insertion section of the guide section, and the stability of holding the storage section in the closed state is improved by the loading pressure of the support section and the insertion of the guide section into the insertion section of the support section.

[0011] According to the present invention, the support part is lifted from the entry portion of the guide part by the lifting mechanism, allowing the support part to escape from the entry portion of the guide part. In addition to reducing the loading pressure of the support part, the entry of the support part into the entry portion of the guide part is eliminated, reducing the effort required by the operator to operate the storage part to the open state.

[0012] In the present invention, it is preferable that the support portion is a support roller capable of rolling along the guide portion.

[0013] According to the present invention, since the support portion is a support roller, the support roller rolls on the guide portion when the storage portion is operated to the open state, thereby reducing the effort required by the operator to operate the storage portion to the open state. In this case, when the support roller is raised by the lifting mechanism, the mounting pressure of the support roller is reduced, so that the effort required by the worker to open the storage section is reduced.

[0014] In the present invention, it is preferable that the lifting mechanism is provided with a lifting arm extending downward from a second axis core that is rotatable around a second axis core along a radial direction relative to the first axis core and that can swing to one side and the other side relative to a vertical line passing through the second axis core, a lifting roller that is provided at the lower part of the lifting arm and can roll along the guide portion, an operating arm that is provided on the lifting arm and that can lift the support part via the lifting arm and the lifting roller by operating the lifting arm to the other side relative to the vertical line, and that is manually operated, and a stopper portion that stops the swinging of the lifting arm to the other side when the support part is lifted.

[0015] According to the present invention, in the lifting mechanism, an operator operates the operating arm to move the lifting arm toward the other side, whereby the support portion is lifted via the lifting arm and lifting roller as the lifting roller rolls along the guide portion. When the lifting arm and lifting roller cross the vertical line passing through the second axis to the other side, the weight of the storage section causes the lifting arm to attempt to swing further toward the other side, but the swinging of the lifting arm toward the other side is stopped by the stopper section, so that the support section is maintained in the lifted position.

[0016] With this, when the storage portion is operated to the open state, the lifting roller rolls along the guide portion, thereby reducing the effort required by the worker to operate the storage portion to the open state. When the support part is placed on the guide part due to displacement of various parts of the storage part, etc., the support part and lifting roller are placed on the guide part, so that the storage part is stably supported on the guide part when it is operated toward the open state, and the lifting mechanism maintains the support part in a lifted state, reducing the mounting pressure of the support part, thereby reducing the effort required by the operator to operate the storage part into the open state.

[0017] In the present invention, it is preferable that an extension arm be provided which is detachable from the operating arm and which can extend the length of the operating arm by being attached to the operating arm.

[0018] According to the present invention, when an operator operates the operating arm, the extension arm is attached to the operating arm to extend the length of the operating arm, so that even when crops are stored in the storage section, the operator can operate the lifting arm to one side and the other side smoothly by operating the operating arm (extension arm).

[0019] In the present invention, it is preferable that a support frame is provided at the bottom of the storage section along a direction perpendicular to the radial direction relative to the first axis, and that, in a planar view, the support section is provided on one of the sides closer to and farther from the first axis relative to the support frame, and the lifting mechanism is provided on the other side closer to and farther from the first axis relative to the support frame.

[0020] According to the present invention, when the support part and the lifting mechanism are provided in the storage part, the support part and the lifting mechanism are arranged on opposite sides of each other with the support frame in between, and the support part and the lifting mechanism are arranged with minimal interference with each other, which is advantageous in terms of simplifying the structure.

[0021] In the present invention, it is preferable that a crop discharge mechanism capable of discharging crops from the storage section is provided at the bottom of the storage section along a radial direction relative to the first axis, and when viewed from the radial direction relative to the first axis, the support section is provided on one lateral side of the crop discharge mechanism, and the lifting mechanism is provided on the other lateral side of the crop discharge mechanism.

[0022] In the harvester, a crop discharge mechanism capable of discharging the crops from the storage unit may be provided at the bottom of the storage unit. According to the present invention, the support part and the lifting mechanism are arranged on one side and the other side of the crop discharge mechanism in the horizontal direction, and are arranged apart from each other so that the support part and the lifting mechanism are arranged with little interference with each other, which is advantageous in terms of simplifying the structure.

[0023] In the present invention, it is preferable that the lower part of the storage section is formed in a downwardly tapered shape with a width narrowing downward toward the crop discharge mechanism when viewed from a radial direction relative to the first axis, and that the lifting mechanism is provided in a region below the lower part of the storage section.

[0024] When a crop discharge mechanism capable of discharging crops from the storage section is provided at the bottom of the storage section, the lower part of the storage section may be formed in a downwardly tapered shape such that its width narrows as it approaches the crop discharge mechanism, and space may be created in the area below the lower part of the storage section. According to the present invention, since the lifting mechanism is provided in the area below the lower portion of the storage part, the area below the lower portion of the storage part can be effectively utilized.

[0025] In the present invention, it is preferable that, when viewed from a radial direction relative to the first axis, the support portion is provided on the inner side of the body frame relative to the crop discharge mechanism, and the lifting mechanism is provided on the lateral outer side of the body frame relative to the crop discharge mechanism.

[0026] According to the present invention, the lifting mechanism is provided on the outer lateral side of the body frame relative to the crop discharge mechanism, so that the lifting mechanism is closer to an operator standing on the ground and can easily operate the lifting mechanism, improving the operability of the lifting mechanism.

[0027] In the present invention, an intermediate state in which the vehicle is located at an end of the vehicle body frame is set at a position between the closed state and the open state, and the guide portion is Storage section It is preferable that the storage section be provided with a stop mechanism that can guide the storage section between the closed state and the intermediate state and that can be operated to a blocking position that stops the storage section in the intermediate state when the storage section is operated from the closed state toward the open state, and to an allowing position that allows movement of the storage section to the open state and to the closed state in the intermediate state.

[0028] According to the present invention, when the support portion is placed on the guide portion after being lifted by the lifting mechanism, when the storage portion (support portion) is operated from the closed state toward the open state, the storage portion (support portion) is supported by the guide portion between the closed state and the intermediate state, and when it moves beyond the intermediate state toward the open state, the guide portion no longer supports the storage portion (support portion).

[0029] According to the present invention, when the storage portion (support portion) is operated from a closed state toward an open state, when the storage portion (support portion) reaches an intermediate state, the storage portion (support portion) stops in the intermediate state due to a stopping mechanism in a blocking position. This makes it easier for workers to carry out maintenance work, which can be done without operating the storage section to the open state, and improves workability.

[0030] According to the present invention, when the storage section (support section) is operated from an intermediate state to an open state, the operator can operate the stop mechanism to an allowable position, thereby allowing the storage section (support section) to pass through the intermediate state, and therefore the storage section (support section) can be operated from the intermediate state toward the open state. As a result, when the operator operates the stop mechanism to the permissible position, the operator is alerted to the fact that the guide portion will no longer support the storage portion (support portion).

[0031] In the present invention, it is preferable that a biasing mechanism is provided which biases the stop mechanism to the blocking position, and when the storage portion is operated from the open state toward the intermediate state, the storage portion comes into contact with the stop mechanism in the blocking position, thereby operating the stop mechanism to the permissible position against the biasing mechanism, and when the storage portion passes through the intermediate state, the stop mechanism is operated to the blocking position by the biasing mechanism.

[0032] According to the present invention, when the storage section (support section) is operated from the open state toward the closed state, when the storage section (support section) reaches an intermediate state, the storage section comes into contact with the stop mechanism in the blocking position, and the stop mechanism is operated to the permissible position against the biasing mechanism, so that the storage section (support section) can pass through the intermediate state.

[0033] This improves operability because, when the storage section (support section) is operated from the open state toward the closed state, the operator does not need to operate the stop mechanism from the blocking position to the allowing position. Once the storage portion (support portion) passes through the intermediate state, the stopping mechanism is automatically operated to the blocking position by the biasing mechanism, so that the operator does not have to operate the stopping mechanism from the permissible position to the blocking position, improving operability.

[0034] In the present invention, it is preferable that an intermediate state holding mechanism capable of holding and releasing the storage portion in the intermediate state is provided.

[0035] According to the present invention, when the storage section (support section) is operated to an intermediate state, the storage section is held in the intermediate state by the intermediate state holding mechanism, making it easier for workers to perform maintenance work that can be performed without operating the storage section to the open state, improving workability. [Brief description of the drawings]

[0036] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a right side view of the engine and the front of the grain tank. [Figure 4] FIG. 2 is a plan view of the driver's section and the front of the grain tank. [Diagram 5] FIG. [Figure 6] FIG. 2 is a front view of the front of the grain tank. [Figure 7] 1 is a cross-sectional plan view of the guide portion, the support roller, the lifting mechanism, the stopping mechanism, and the intermediate state holding mechanism. FIG. [Figure 8] FIG. 2 is an exploded perspective view of the guide portion, the support roller, the lifting mechanism, the stopping mechanism, and the intermediate state holding mechanism. [Figure 9] FIG. 2 is a longitudinal sectional rear view of the vicinity of the front part of the grain tank in a closed state. [Figure 10] This is a vertical cross-sectional rear view near the front of the grain tank, showing a state in which the support roller has been lifted by the lifting mechanism from the state shown in Figure 9. [Figure 11] This is a vertical cross-sectional rear view near the front of the grain tank, showing the state in which the grain tank has been operated from the state shown in Figure 10 to an intermediate state. [Figure 12] This is a vertical cross-sectional rear view near the front of the grain tank, showing the state in which the grain tank has been operated to an open state from the state shown in Figure 11. [Figure 13] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0037] Figures 1 to 13 show a standard combine harvester, which is an example of a harvester, in which F indicates the forward direction, B indicates the backward direction, U indicates the upward direction, D indicates the downward direction, R indicates the right direction, and L indicates the left direction.

[0038] (Overall configuration of the combine) As shown in Figures 1 and 2, a machine body 1 is supported by a crawler-type traveling device 2, and a reaping unit 3 and a driving unit 4 are provided at the front of the machine body 1. A threshing device 5 is provided at the left side of the machine body 1, and a grain tank 6, which is a storage unit, is provided at the right side of the machine body 1. A crop discharge device 7 is connected to the lower part of the rear part of the grain tank 6.

[0039] The conveying device 8 is supported on the front part of the threshing device 5 so as to be swingable up and down around an axis along the left-right direction, and extends forward from the threshing device 5. The reaping unit 3, which is connected to the front part of the conveying device 8 and harvests crops in the field, is provided at the front part of the machine body 1. A lifting cylinder (not shown) is connected between the machine body 1 and the conveying device 8, and the lifting cylinder lifts and lowers the reaping unit 3 and the conveying device 8.

[0040] With the above configuration, as the machine body 1 advances, crops in the field are introduced into the reaping unit 3 and harvested, and the crops are transported from the reaping unit 3 through the transport device 8 and supplied to the threshing device 5. The crops are threshed by the threshing device 5, and the crops threshed and collected by the threshing device 5 are stored in the grain tank 6. When the grain tank 6 is full, the crops in the grain tank 6 are discharged by the discharge device 7.

[0041] (Configuration for jacking up the aircraft) 13, a plurality of square pipe members are connected in a frame shape to form a machine body frame 12, which constitutes the skeleton of the machine body 1. When performing maintenance work on the traveling device 2, etc., the machine body frame 12 is jacked up.

[0042] Jack action sections D1, D2, D3, against which a jack (not shown) is applied, are provided in three locations: the left and right central sections of the front part of the body frame 12 (between the driving section 4 and the front part of the threshing device 5 in a plan view), the right part of the rear part of the body frame 12 (the part rearward of the rear end part of the right running device 2), and the left part of the rear part of the body frame 12.

[0043] Since the left part of the rear part of the body frame 12 is located forward of the rear end part of the left traveling device 2, the jack up frame 64 is provided on the left part of the rear part of the body frame 12 so as to be movable in the front-rear direction. As shown by the two-dot chain line in Fig. 13, the jack up frame 64 is moved to a position rearward of the rear end part of the left traveling device 2, and the jack up frame 64 becomes the jack action part D3.

[0044] (Glentank Configuration) As shown in Figures 1, 2, and 3, the grain tank 6 is configured in a box shape by connecting multiple boards, and the crops threshed and collected by the threshing device 5 are loaded into the grain tank 6 from the upper part of the left side surface of the grain tank 6 and stored in the grain tank 6.

[0045] As shown in Figures 3 and 6, a bottom screw 9 (corresponding to a crop discharge device) is provided on the bottom of the grain tank 6 along the front-rear direction, and is provided on the bottom of the grain tank 6 along the radial direction relative to the axis P1 (corresponding to the first axis) described in (Configuration of the Discharge Device) described later. A vibration plate 10 is provided on the bottom of the grain tank 6 so as to be located above the bottom screw 9 along the front-rear direction (radial direction relative to the axis P1 (first axis)).

[0046] The lower parts 6a and 6b of the grain tank 6 are tapered downwards when viewed from the front-rear direction (the radial direction relative to the axis P1 (first axis)) so that the width narrows toward the bottom screw 9. A lower cover 11 made of synthetic resin is removably attached to the grain tank 6, and the lower part 6a of the grain tank 6 is covered by the lower cover 11.

[0047] A flat support frame 14 is connected to the front of the lower parts 6a and 6b of the grain tank 6 along the left-right direction (a direction perpendicular to the radial direction of the axis P1 (first axis)). A gear case 15 is connected to the support frame 14, and an output shaft (not shown) of the gear case 15 is connected to the front of the bottom screw 9.

[0048] An arm 10a connected to the diaphragm 10 is disposed on the front side of the support frame 14, and the arm 10a of the diaphragm 10 is linked to an eccentric cam (not shown) attached to the output shaft of the gear case 15.

[0049] (Configuration of exhaust device) As shown in Figures 1 and 2, the discharge device 7 is provided with a vertical conveying section 7a having a conveying screw (not shown) built in, and a horizontal conveying section 7b having a conveying screw (not shown) built in, and a discharge outlet 7c is provided at the end of the horizontal conveying section 7b.

[0050] The vertical conveying section 7a of the discharge device 7 is supported by the body frame 12 so as to be rotatable about an axis P1 along the vertical direction at the right rear part of the body frame 12. The horizontal conveying section 7b of the discharge device 7 is supported on an upper part of the vertical conveying section 7a of the discharge device 7 so as to be able to swing up and down.

[0051] The vertical conveying section 7a of the discharge device 7 is rotated around the axis P1, whereby the discharge device 7 (vertical conveying section 7a and horizontal conveying section 7d) is turned, and the position of the discharge opening 7c of the discharge device 7 is changed in the horizontal direction. The horizontal conveying section 7b of the discharge device 7 is swung up and down, whereby the position of the discharge opening 7c of the discharge device 7 is changed in the vertical direction.

[0052] The lower part of the conveying screw of the vertical conveying section 7a of the discharge device 7 is connected to the rear part of the bottom screw 9 via a bevel gear mechanism (not shown). The upper part of the conveying screw of the vertical conveying section 7a of the discharge device 7 and the conveying screw of the horizontal conveying section 7b of the discharge device 7 are connected via a bevel gear mechanism (not shown).

[0053] (Grain tank bottom screw and vibration plate, discharge device drive configuration) 3 to 6, the engine 13 is provided on the right side of the front part of the body frame 12, and the output pulley 13a is provided on the right side of the engine 13. An input pulley 15a is provided on the right side of the gear case 15, and a transmission belt 21 is attached between the output pulley 13a of the engine 13 and the input pulley 15a of the gear case 15.

[0054] A discharge clutch 22 is provided for the transmission belt 21. The discharge clutch 22 is provided with an arm 22a supported by a frame 16a at the rear of the bonnet 16 so as to be swingable up and down around an axis P3 along the left-right direction, and a pulley 22b provided at the end of the arm 22a.

[0055] By operating the arm 22a of the discharge clutch 22 upward, the transmission belt 21 is tensioned, and the power of the output pulley 13a of the engine 13 is transmitted to the input pulley 15a of the gear case 15 via the transmission belt 21 (transmission state of the discharge clutch 22). By operating the arm 22a of the discharge clutch 22 downward, the transmission belt 21 is slackened, and the transmission of power to the input pulley 15a of the gear case 15 is interrupted (disconnected state of the discharge clutch 22).

[0056] As shown in Figures 1 to 4, the driver's section 4 is provided with a bonnet 16 that houses the engine 13, a front control section 17 provided in front of the bonnet 16, a lateral control section 18 provided across the left portion of the bonnet 16 and the left portion of the front control section 17, a driver's seat 19 provided in the bonnet 16, and a roof section 20 covering the above of these.

[0057] 3 and 4, in the driver's section 4, an operation box 23 is provided at a position diagonally rear-left of the driver's seat 19 and at the rear of the lateral control section 18, and a discharge clutch lever 24 and a drink holder 25 are provided in the operation box 23, and a wire 26 is connected between the discharge clutch lever 24 and the arm 22a of the discharge clutch 22. The operator in the driver's seat 19 operates the discharge clutch lever 24 to swing the arm 22a of the discharge clutch 22 up and down, thereby operating the discharge clutch 22 to a transmission state and a disengagement state.

[0058] When the discharge clutch 22 is operated to the transmission state, the power transmitted to the input pulley 15a of the gear case 15 is transmitted through a bevel gear mechanism (not shown) and output shaft inside the gear case 15 to the bottom screw 9, the conveying screw of the vertical conveying section 7a of the discharge device 7, and the conveying screw of the horizontal conveying section 7b, which are rotated. The eccentric cam of the output shaft of the gear case 15 and the arm 10a of the vibration plate 10 drive the vibration plate 10 to swing back and forth left and right.

[0059] While the vibrating plate 10 prevents the crop from bridging, the crops in the grain tank 6 are discharged from the grain tank 6 by the bottom screw 9 into the discharge device 7, transported along the vertical conveying section 7a and horizontal conveying section 7b of the discharge device 7, and discharged from the discharge outlet 7c of the discharge device 7.

[0060] (Summary of Grain Tank Status Changes) As shown in Figs. 1 and 2, the rear part of the grain tank 6 is supported on the machine frame 12 via the vertical conveying part 7a of the discharge device 7 so as to be swingable (state changeable) around an axis P1.

[0061] 1 and 2 is a closed state A1 in which the grain tank 6 is located on the machine frame 12 and can store harvested crops. The state shown by the two-dot chain line in Fig. 2 is an open state A3 in which the grain tank 6 is moved laterally outward to the right around the axis P1 and protrudes laterally outward to the right from the machine frame 12.

[0062] When an operator operates the grain tank 6 from the closed state A1 to the open state A3, the operator must stop the engine 13, operate the discharge clutch 22 to the disengaged state, and remove the transmission belt 21 from the input pulley 15a of the gear case 15.

[0063] (Bonnet configuration) 3, 4 and 5, a bonnet cover 27 is provided to cover the outer right side of the bonnet 16. A radiator 28, a cooling fan 29, a fan shroud 30, etc. are provided on the right side of the bonnet 16, and the outer right side of these components are covered by the bonnet cover 27.

[0064] The bonnet cover 27 is formed into a box shape using sheet metal members and is supported by a frame 16b at the right front part of the bonnet 16 so as to be swingable about an axis P4 along the up-down direction. A breathable dustproof member 27b is provided on the side surface part of the bonnet cover 27, a rubber seal member 27c is provided on the outer periphery of the bonnet cover 27, and an auxiliary handle 27d for getting in and out is provided at the front part of the bonnet cover 27.

[0065] Buckle-shaped fixing members 31, 32 that can fix and release the bonnet cover 27 in the closed position are provided on the right rear frame 16c and the upper right frame 16d of the bonnet 16. When the bonnet cover 27 is operated to the closed position, a rear end 27a of the bonnet cover 27 protrudes rearward beyond the frame 16c of the bonnet 16, and an opening 27e that enables an operator to operate the fixing member 31 is provided on the rear of the lateral surface of the bonnet cover 27.

[0066] A rod-shaped restricting member 33 is provided on the lower part of the frame 16b of the bonnet 16 so as to be swingable about an axis P5 along the up-down direction. A flat restricting plate 34 is connected to the front part of the lower part of the bonnet cover 27. A restricting hole 34a is opened in the restricting plate 34, and an end of the restricting member 33 is inserted into the restricting hole 34a of the restricting plate 34.

[0067] A guide plate 35 is connected to the right part of the aircraft frame 12 where the bonnet 16 is provided so as to protrude laterally outward to the right from the aircraft frame 12. The guide plate 35 is provided with a horizontal portion 35a and an inclined portion 35b that faces diagonally downward and becomes lower the further away from the bonnet 16 it is.

[0068] 1, 3, and 4, when the bonnet cover 27 is in the closed position, the rear end 27a of the bonnet cover 27 is inserted under the front part of the grain tank 6 in a side view. The rear end 27a of the bonnet cover 27 and the front end 11a of the lower cover 11 overlap with the input pulley 15a of the gear case 15 in a side view.

[0069] (Conventional technologies, issues and effects related to bonnet covers) The rear end 27a of the bonnet cover 27 and the front end 11a of the lower cover 11 are configured to be located near the frame 16c of the bonnet 16. When removing the power transmission belt 21 from the input pulley 15a of the gear case 15, there is room for improvement in terms of improving the workability.

[0070] As shown in Figures 1, 3, and 4, the rear end 27a of the bonnet cover 27 extends rearward beyond the right rear frame 16c of the bonnet 16, and the rear end 27a of the bonnet cover 27 and the front end 11a of the lower cover 11 overlap with the input pulley 15a of the gear case 15 in a side view.

[0071] By operating the bonnet cover 27 to the open position, an operator can insert his / her hand and remove the transmission belt 21 from the input pulley 15a of the gear case 15. Similarly, by removing the lower cover 11, an operator can insert his / her hand and remove the transmission belt 21 from the input pulley 15a of the gear case 15.

[0072] This allows the worker to remove the transmission belt 21 from the input pulley 15a of the gear case 15 whether he or she operates the bonnet cover 27 to the open position without removing the lower cover 11, or removes the lower cover 11 while leaving the bonnet cover 27 in the closed position, thereby improving workability.

[0073] As shown in Figures 3 and 4, when the bonnet cover 27 is operated to the closed position, the upper and lower parts of the bonnet cover 27 are fixed by the fixing members 31, 32, so that the bonnet cover 27 is stably fixed in the closed position. Even if the rear end 27a of the bonnet cover 27 is located rearward of the right rear frame 16c of the bonnet 16, the worker can easily insert his / her hand through the opening 27e of the bonnet cover 27 and operate the fixing member 31.

[0074] When the bonnet cover 27 is moved from the closed position to the open position, the end of the restricting member 33 moves along the restricting hole a of the restricting plate while the restricting member 33 swings counterclockwise in FIG. As shown in FIG. 5, when the bonnet cover 27 reaches the open position, the end of the restricting member 33 enters into the bent portion at the end of the restricting hole 34a of the restricting plate 34, and the bonnet cover 27 is held in the open position.

[0075] As shown in Figures 5 to 4, when the bonnet cover 27 is operated from the open position to the closed position, even if the bonnet cover 27 is slightly lowered from the position of the axis P4, the lower part of the bonnet cover 27 comes into contact with the inclined portion 35b of the guide plate 35 and is lifted up, rests on the horizontal portion 35a of the guide plate 35, and is guided to the closed position.

[0076] (Configuration of guide and support rollers regarding changing the state of the grain tank) As shown in Figures 6 to 9, a flat guide portion 36 is connected to the right portion of the aircraft frame 12 so as to be located below the support frame 14 of the grain tank 6 when it is operated to the closed state A1 (see Figure 13).

[0077] A square-shaped opening 36a (corresponding to the recess) is formed in a portion of the guide section 36 facing inwardly from the body frame 12, and an opening 36b is formed in a portion of the guide section 36 facing laterally outwardly to the right of the body frame 12. An inclined portion 36c that faces diagonally downward and becomes lower the further away from the body frame 12 it is provided at the end of the guide section 36 facing laterally outwardly to the right of the body frame 12.

[0078] In the support frame 14, a support roller 37 (corresponding to a support part) is rotatably supported in a front part (corresponding to the side farther from the first axis) of the support frame 14 when viewed in a plan view, and in a part on the inner side (corresponding to one side in the lateral direction) of the body frame 12 relative to the bottom screw 9 when viewed from the fore-and-aft direction (corresponding to the radial direction relative to the first axis).

[0079] The support roller 37 is provided on the lower parts 6a, 6b of the grain tank 6 via the support frame 14, and is provided in the lower area of ​​the lower part 6b on the inner side of the body frame 12 of the grain tank 6, and is capable of rolling along the guide part 36.

[0080] (Configuration for keeping the grain tank closed) As shown in Figures 6 to 9, a channel-shaped bracket 38 is connected to the support frame 14 at a front portion relative to the support frame 14 in a plan view and at a right lateral outer portion of the body frame 12 relative to the bottom screw 9 when viewed from the front-to-rear direction.

[0081] An engaging member 39 formed by bending a round bar material into an angle shape is attached to a bracket 38 so as to be rotatable and movable up and down, and a spring 40 is provided to bias the engaging member 39 downward.

[0082] 3 and 6, a hook-shaped engaging member 41 is provided at the left front portion of the upper portion of the grain tank 6, and the engaging member 41 can engage with and disengage from a fixed portion 5a provided on the threshing device 5. An operating lever 42 is provided on the support frame 14 in a portion forward of the axis P1 relative to the support frame 14 in a plan view, and in a portion laterally outward to the right of the body frame 12 relative to the bottom screw 9 when viewed from the front-rear direction.

[0083] A connecting rod 43 is connected between the engaging member 41 and the operating lever 42, and a spring 44 that biases the engaging member 41 toward the engaging side of the fixed portion 5a of the threshing device 5 is attached to the engaging member 41 and the operating lever 42.

[0084] (Configuration of the lift mechanism for changing the state of the grain tank) As shown in Figures 6 to 9, a lifting mechanism 45 is provided on the rear side (corresponding to the side closer to the first axis) of the support frame 14 in a planar view, and on the right lateral outer side (corresponding to the other lateral side) of the body frame 12 relative to the bottom screw 9 when viewed from the fore-and-aft direction (corresponding to the radial direction relative to the first axis).

[0085] The lifting mechanism 45 is provided with a lifting arm 46, a lifting roller 47, an operating arm 48, and a stopper portion 49. The lifting mechanism 45 is provided in a lower area relative to the lower portion 6a of the grain tank 6, and is provided on the right lateral outer side of the machine frame 12 relative to the bottom screw 9.

[0086] The lifting arm 46 is formed into a box shape by connecting a number of plate materials, and is supported by the support frame 14 so as to be swingable about an axis P2 (corresponding to a second axis) along the front-rear direction (corresponding to a radial direction relative to the first axis). The lifting arm 46 extends downward from the axis P2, and is swingable over the right lateral outer side (corresponding to one side) of the machine body frame 12 and the inner side (corresponding to the other side) of the machine body frame 12 with respect to a vertical line B1 passing through the axis P2.

[0087] The lifting roller 47 is rotatably provided at the lower part of the lifting arm 46, and is placed on the guide part 36 so as to be able to roll along the guide part 36. The stopper part 49 is formed in a rod shape, and is connected to the support frame 14 so as to be located on the inner side of the machine body frame 12 with respect to the lifting arm 46.

[0088] The operating arm 48 is provided on the lifting arm 46 and extends outwardly to the right of the machine frame 12. When an operator holds the operating arm 48 and moves it upward and downward, the lifting arm 46 is swung inwardly and outwardly to the right of the machine frame 12 with respect to the vertical line B1. The length of the operating arm 48 is set so that the operating arm 48 does not come into contact with the lower cover 11 even when the lower cover 11 is attached.

[0089] The state shown in Figures 6 and 9 is a state in which the grain tank 6 is operated to the closed state A1, the operating arm 48 is operated upward, and the lifting arm 46 is operated to the right lateral outer side of the body frame 12 relative to the vertical line B1, and the support roller 37 is lowered and inserted into the opening 36a of the guide section 36.

[0090] When the worker operates the operating arm 48 downward and operates the lifting arm 46 toward the inside of the body frame 12 relative to the vertical line B1, the front of the grain tank 6 is lifted relative to the guide part 36 via the lifting arm 46 and lifting roller 47, and the support roller 37 is lifted from the opening 36a of the guide part 36 (see Figure 10).

[0091] As described above, when the lifting arm 46 is operated toward the inside of the aircraft frame 12 relative to the vertical line B1, and the lifting arm 46 and lifting roller 47 cross the vertical line B1 toward the inside of the aircraft frame 12, and the front of the grain tank 6 and the support roller 37 are lifted, the weight of the grain tank 6 causes the lifting arm 46 to attempt to swing further toward the inside (the other side) of the aircraft frame 12.

[0092] In this case, the swinging of the lifting arm 46 inwardly of the body frame 12 is stopped by the stopper portion 49, so that the front part of the grain tank 6 and the support roller 37 are maintained in the lifted state.

[0093] (Configuration of extension arm for changing state of Glentank) As shown in Figures 1, 6 and 9, a round pipe-shaped extension arm 50 is attached to the lower part 6a of the grain tank 6. As shown in Figure 10, an operator can extend the length of the operating arm 48 by removing the extension arm 50 and inserting it into the operating arm 48 and attaching it.

[0094] This allows the worker to effortlessly operate the lifting arm 46 toward the right lateral outer and inner sides of the machine frame 12 by operating the operating arm 48 (extension arm 50).

[0095] (Configuration of the stop mechanism for changing the state of the grain tank) As shown in Figures 6, 7, and 8, in the body frame 12, a block-shaped support part 51 is connected to the front part of the inclined part 36c of the guide part 36, a channel-shaped bracket 52 is connected to the support part 51, and an opening 52a is formed in the bracket 52.

[0096] The stop mechanism 53 is provided on the support part 51, and includes a blocking member 54, a fulcrum shaft 55, an arm 56, and a spring 57 (corresponding to a biasing mechanism). The fulcrum shaft 55 is supported on the support part 51 so as to be rotatable about an axis P6 along the front-rear direction, the blocking member 54 is connected to the rear end of the fulcrum shaft 55, and the arm 56 is connected to the front end of the fulcrum shaft 55.

[0097] The blocking member 54 is provided with a blocking portion 54a at one end and a receiving portion 54b at the other end, and the blocking member 54 is swingable around the axis P6 between a blocking position C1 (see Figs. 8 and 9) and an allowable position C2 (see Fig. 12). At the blocking position C1, the blocking portion 54a of the blocking member 54 protrudes above the support portion 51, and the receiving portion 54b of the blocking member 54 abuts against the upper surface of the body frame 12. At the allowable position C2, the blocking portion 54a and the receiving portion 54b of the blocking member 54 are at the same height as the support portion 51.

[0098] A spring 57 is attached to the fulcrum shaft 55, and the blocking member 54 (stop mechanism 53) is biased to the blocking position C1 by the spring 57. By holding and operating the arm 56, an operator can operate the blocking member 54 (stop mechanism 53) against the spring 57 to the allowable position C2.

[0099] (Configuration of intermediate state retention mechanism for changing the state of the grain tank) As shown in Figures 6, 7, and 8, an intermediate state holding mechanism 58 is provided on the support frame 14, in a front portion (corresponding to the side farther from the first axis) of the support frame 14 in a planar view, and on the inner side (corresponding to one lateral side) of the body frame 12 relative to the bottom screw 9 when viewed from the fore-and-aft direction (corresponding to the radial direction relative to the first axis).

[0100] The intermediate state holding mechanism 58 is provided with a support member 59 , an engagement member 60 , and a spring 61 . The support member 59 is formed by bending a plate material into a crank shape, and is connected to the support frame 14. A receiving portion 59a is provided at the lower portion of the support member 59, and a support portion 59b is provided at the upper portion of the support member 59.

[0101] The engaging member 60 is formed by bending a round bar material into an angle shape, and is attached to the support member 59 so as to be rotatable and movable up and down. The engaging member 60 is biased downward by a spring 61.

[0102] (Operation of grain tank from closed to open)-1 The state shown in Figures 6, 7, and 9 is the state in which the grain tank 6 is operated to the closed state A1, the support roller 37 is lowered and enters the opening 36a of the guide portion 36, and the front of the grain tank 6 is supported by the guide portion 36 via the support roller 37.

[0103] The engaging member 39 is lowered by the spring 40 and enters the opening 36b of the guide portion 36, and the engaging member 41 (see Figure 6) engages with the fixed portion 5a of the threshing device 5 by the spring 44, thereby maintaining the grain tank 6 in the closed state A1.

[0104] In the lifting mechanism 45, the operating arm 48 is operated upward, and the lifting arm 46 (the placement point where the lifting roller 47 contacts the guide portion 36) is operated to the right lateral outer side of the body frame 12 with respect to the vertical line B1.

[0105] In the intermediate state holding mechanism 58, the engaging member 60 is lifted and placed on the support portion 59b of the support member 59, and is held in place by the lifting operation. In the stop mechanism 53, the blocking member 54 is operated by the spring 57 to the blocking position C1.

[0106] An operator standing on the ground stops the engine 13, disengages the discharge clutch 22, and removes the lower cover 11, or operates the bonnet cover 27 to the open position, and removes the transmission belt 21 from the input pulley 15a of the gear case 15.

[0107] As shown in FIG. 10, the worker removes the lower cover 11, removes the extension arm 50 from the lower part 6a of the grain tank 6 and attaches it to the operating arm 48, and operates the operating arm 48 (extension arm 50) downward to operate the lifting arm 46 (the mounting point where the lifting roller 47 contacts the guide portion 36) toward the inward side of the body frame 12 with respect to the vertical line B1.

[0108] By operating the lifting arm 46 (the mounting point where the lifting roller 47 contacts the guide portion 36) toward the inward side of the body frame 12 relative to the vertical line B1, the front of the grain tank 6 is lifted relative to the guide portion 36 via the lifting arm 46 and the lifting roller 47, and the support roller 37 is lifted from the opening 36a of the guide portion 36 by the lifting mechanism 45.

[0109] The swinging of the lifting arm 46 inwardly of the body frame 12 due to the weight of the grain tank 6 is stopped by the stopper portion 49, thereby maintaining the front of the grain tank 6 and the support roller 37 in a lifted position.

[0110] (Operation of grain tank from closed to open)-2 As shown in FIG. 10, the worker lifts up the engaging member 39 and removes it upward from the opening 36b of the guide portion 36, and places the engaging member 39 on the upper support portion 38a of the bracket 38, thereby maintaining the engaging member 39 in the lifted position.

[0111] The operator operates the operating lever 42 (see Figure 6) against the spring 44 to disengage the engaging member 41 from the fixed part 5a of the threshing device 5, while holding the handle 62 connected to the support frame 14, and operates the grain tank 6 toward the open position A3 to the right and outward, as shown in Figures 10 and 11.

[0112] As a result, when the lifting roller 47 is placed on the guide portion 36, the front of the grain tank 6 is supported by the guide portion 36 via the lifting roller 47, and the lifting roller 47 rolls to the right along the guide portion 36 while being guided from the closed state A1 toward the open state A3.

[0113] The support roller 37 escapes from the opening 36a of the guide portion 36, and the support roller 37 is placed on the guide portion 36 due to the displacement of each part of the grain tank 6. By placing the support roller 37 on the guide portion 36, the front part of the grain tank 6 is supported by the guide portion 36 via the support roller 37, and the support roller 37 is guided from the closed state A1 toward the open state A3 while rolling to the right along the guide portion 36.

[0114] (Operation of grain tank from closed to open)-3 As shown in Figure 11, when the grain tank 6 is operated toward the open state A3, the lifting roller 47 comes off the guide portion 36 and the support roller 37 reaches the right end of the guide portion 36, and in the intermediate state holding mechanism 58, the receiving portion 59a of the support member 59 hits the blocking portion 54a of the blocking member 54 (stop mechanism 53) in the blocking position C1, and the grain tank 6 stops.

[0115] In this case, even if a large load is applied to the blocking portion 54a of the blocking member 54 (stopping mechanism 53) in the blocking position C1 toward the open state A3 due to the inertia of the grain tank 6 toward the open state A3, the blocking member 54 will not move because the receiving portion 54b of the blocking member 54 is in contact with the upper surface of the aircraft frame 12.

[0116] As shown in Figure 11, the intermediate state A2 of the grain tank 6 is the state in which the receiving portion 59a of the support member 59 contacts the blocking portion 54a of the blocking member 54 (stopping mechanism 53) in the blocking position C1 and the grain tank 6 is stopped, and the intermediate state A2 is set at a position between the closed state A1 and the open state A3, at the right end of the body frame 12.

[0117] The guide portion 36 guides the support roller 37 between the closed state A1 and the intermediate state A2, and in the intermediate state A2, the support roller 37 is positioned at the right end of the guide portion 36, and the front of the grain tank 6 is supported by the guide portion 36 via the support roller 37. When the grain tank 6 is operated from the closed state A1 toward the open state A3, the grain tank 6 is stopped in the intermediate state A2 by the blocking member 54 (stop mechanism 53) in the blocking position C1.

[0118] As shown in Figure 11, when the grain tank 6 stops in the intermediate state A2, the operator operates the intermediate state holding mechanism 58 to remove the engaging member 60 from the support portion 59b of the support member 59, lowers the engaging member 60 by the spring 61, and inserts it into the opening 52a of the bracket 52, thereby holding the grain tank 6 in the intermediate state A2.

[0119] (Operation of grain tank from closed to open)-4 When an operator operates the grain tank 6 from the intermediate state A2 to the open state A3, as shown in Figure 11, the operator lifts the engaging member 60 in the intermediate state holding mechanism 58 and removes it upward from the opening 52a of the bracket 52, releasing the holding in the intermediate state A2, and places the engaging member 60 on the support portion 59b of the support member 59 to hold it in the lifted state.

[0120] The operator holds the handle 62 and moves the grain tank 6 slightly back from the intermediate state A2 toward the closed state A1 to move the receiving portion 59a of the support member 59 slightly away from the blocking portion 54a of the blocking member 54 (stop mechanism 53) in the blocking position C1.

[0121] As shown in Figures 11 and 12, in the stopping mechanism 53, the operator holds the arm 56 and operates the blocking member 54 (stopping mechanism 53) against the spring 57 to the permissible position C2, while holding the handle 62 and operating the grain tank 6 from the intermediate state A2 toward the open state A3.

[0122] In the intermediate state holding mechanism 58, the engaging member 60 passes above the support portion 51 and the bracket 52, and the receiving portion 59a of the support member 59 passes above the blocking member 54 (stop mechanism 53) in the allowable position C2.

[0123] As a result, the movement of the grain tank 6 from the intermediate state A2 to the open state A3 is permitted by the blocking member 54 (stop mechanism 53) in the permitted position C2. After the grain tank 6 is operated from the intermediate state A2 toward the open state A3, when the operator releases the arm 56, the blocking member 54 (stop mechanism 53) is automatically operated by the spring 57 to the blocking position C1.

[0124] When the worker operates the grain tank 6 to the open position A3, he or she simply places a stand (not shown) on the lower front part of the grain tank 6, etc., so that the grain tank 6 is supported on the ground via the stand.

[0125] (Operation of grain tank from open to closed state)-1 When the operator operates the grain tank 6 from the open state A3 to the closed state A1, as shown in Fig. 12, the operator places the engaging member 39 on the upper support portion 38a of the bracket 38 to hold the engaging member 39 in the raised and operated state, and in the intermediate state holding mechanism 58, the engaging member 60 is placed on the support portion 59b of the support member 59 to hold the engaging member 39 in the raised and operated state. In the lifting mechanism 45, the operator removes the extension arm 50 from the operating arm 48 and attaches it to the lower portion 6a of the grain tank 6.

[0126] As shown in FIGS. 6 to 9, a triangular guide member 63 is connected to the inner end of the vehicle body frame 12 at the lower part of the support frame . As shown in Figures 12 to 11, when the grain tank 6 is operated from the open state A3 to the closed state A1, the guide member 63 comes into contact with and rides up the inclined portion 36c of the guide portion 36, and the front of the grain tank 6 is slightly lifted by the guide member 63 and the inclined portion 36c of the guide portion 36.

[0127] By slightly lifting the front of the grain tank 6, the support roller 37 is placed on the guide part 36 from the inclined part 36c of the guide part 36, and the front of the grain tank 6 is supported on the guide part 36 via the support roller 37, and the grain tank 6 reaches the intermediate state A2.

[0128] (Operation of grain tank from open to closed state)-2 As shown in Figure 11, when the grain tank 6 reaches the intermediate state A2, in the intermediate state holding mechanism 58, the engagement member 60 passes above the support portion 51 and the bracket 52, and the receiving portion 59a of the support member 59 contacts the blocking member 54 (stop mechanism 53) at the blocking position C1.

[0129] The blocking member 54 (stop mechanism 53) is in a position inclined obliquely at the blocking position C1. As a result, when the grain tank 6 is operated from the open state A3 toward the closed state A1 and the receiving portion 59a of the support member 59 comes into contact with the blocking member 54 (stop mechanism 53) at the blocking position C1, the receiving portion 59a of the support member 59 passes above the blocking member 54 (stop mechanism 53) at the allowed position C2 while operating the blocking member 54 (stop mechanism 53) against the spring 57 to the allowed position C2. As a result, the movement of the grain tank 6 from the intermediate state A2 to the closed state A1 is permitted by the blocking member 54 (stop mechanism 53) at the allowed position C2.

[0130] When the grain tank 6 passes through the intermediate state A2 (when the receiving portion 59a of the support member 59 passes above the blocking member 54 (stopping mechanism 53) in the permissible position C2), the blocking member 54 (stopping mechanism 53) is automatically operated to the blocking position C1 by the spring 57.

[0131] (Operation of grain tank from open to closed state)-3 As shown in Figures 11 to 9, when the grain tank 6 is operated from the intermediate state A2 toward the closed state A1, the support roller 37 is placed on the guide portion 36, and the front of the grain tank 6 is supported by the guide portion 36 via the support roller 37, and the support roller 37 is guided from the intermediate state A2 toward the closed state A1 while rolling to the left along the guide portion 36.

[0132] In the lifting mechanism 45, the lifting roller 47 is placed on the guide portion 36 from the inclined portion 36c of the guide portion 36, the operating arm 48 is operated upward, and the lifting arm 46 (the placement point where the lifting roller 47 contacts the guide portion 36) is operated to the right lateral outward side of the body frame 12 relative to the vertical line B1.

[0133] When the grain tank 6 reaches the closed state A1, the support roller 37 descends and enters the opening 36a of the guide portion 36. The engaging member 41 (see FIG. 6) automatically engages with the fixed portion 5a of the threshing device 5 by the spring 44.

[0134] The operator removes the engaging member 39 from the support portion 38a of the bracket 38, and lowers the engaging member 39 by the spring 40, and inserts it into the opening 36b of the guide portion 36. This causes the grain tank 6 to be held in the closed state A1.

[0135] (First Alternative Embodiment of the Invention) The grain tank 6 may be provided on the left side of the vehicle frame 12. According to this configuration, the open state A3 of the grain tank 6 is a state in which it protrudes outwardly to the left from the vehicle frame 12.

[0136] (Second Alternative Embodiment of the Invention) Instead of the opening 36a of the guide portion 36, a recess having a bottom may be provided in the guide portion 36 as the recess.

[0137] (Third Alternative Embodiment of the Invention) Instead of the support rollers 37, sled-shaped plates may be provided as support parts at the lower parts 6a and 6b of the grain tank 6. In this configuration, the insertion part of the guide part 36 may be eliminated.

[0138] (Fourth Alternative Embodiment of the Invention) The support roller 37 may be provided on the rear side (corresponding to the side closer to the first axis) of the support frame 14 in a planar view, and the lifting mechanism 45 may be provided on the front side (corresponding to the side farther from the first axis) of the support frame 14 in a planar view.

[0139] (Fifth Alternative Embodiment of the Invention) The support roller 37 and the lifting mechanism 45 may be provided on the inner side of the machine frame 12 with respect to the bottom screw 9 when viewed from the front-rear direction (corresponding to the radial direction with respect to the first shaft core). According to this configuration, the support rollers 37 and the lifting mechanism 45 are provided in the lower area of ​​the lower part 6b on the inner side of the machine frame 12 of the grain tank 6.

[0140] (Sixth Alternative Embodiment of the Invention) In the lifting mechanism 45, when the support roller 37 is lowered and enters the opening 36a of the guide portion 36, the operating arm 48 may be positioned downward and the lifting arm 46 may be configured to be positioned on the inner side (one side) of the body frame 12 with respect to the vertical line B1.

[0141] According to this configuration, when an operator operates the operating arm 48 upward and operates the lifting arm 46 to the lateral outer side (other side) of the body frame 12 relative to the vertical line B1, the lifting arm 46 (the mounting point where the lifting roller 47 contacts the guide portion 36) is operated to the lateral outer side (other side) of the body frame 12 relative to the vertical line B1, and the front of the grain tank 6 is lifted relative to the guide portion 36 via the lifting arm 46 and lifting roller 47.

[0142] (Seventh Alternative Embodiment of the Invention) In the lifting mechanism 45, when the operating arm 48 is operated and the swinging of the lifting arm 46 due to the weight of the grain tank 6 is stopped by the stopper portion 49, and the front of the grain tank 6 and the support roller 37 are maintained in a lifted and operated state, a locking mechanism (not shown) may be provided that can fix and release the lifting arm 46 to the support frame 14 in this state.

[0143] As a result, by fixing the lifting arm 46 to the support frame 14 when the front of the grain tank 6 and the support rollers 37 are lifted, it is possible to prevent the lifting arm 46 from swinging due to vibration or the like, causing the front of the grain tank 6 and the support rollers 37 to be lowered. [Industrial Applicability]

[0144] The present invention can be applied not only to normal type combine harvesters but also to head-feeding type combine harvesters, and can be applied not only to rice harvesters but also to harvesters for other crops. [Explanation of symbols]

[0145] 6 Grain Tank (storage section) 6a Lower 6b Lower part 9 Bottom screw (crop discharge mechanism) 12 Aircraft frame 14 Support frame 36 Guide part 36a Opening (entrance) 37 Support roller (support part) 45 Lifting mechanism 46 Lifting Arm 47 Lifting Roller 48 Operating Arm 49 Stopper part 50 Extension Arm 53 Stopping mechanism 57 Spring (biasing mechanism) 58 Intermediate state retention mechanism A1 Closed state A2 intermediate state A3 Open state B1 plumb line C1 blocking position C2 Permitted position P1 axis (1st axis) P2 axis (second axis)

Claims

1. The body frame, a storage section supported by the body frame so as to be changeable between a closed state in which the storage section is located on the body frame and capable of storing harvested crops, and an open state in which the storage section protrudes laterally outward from the body frame, about a first axis extending in a vertical direction of the body frame; A support portion provided at a lower portion of the storage portion; a guide portion on which the support portion is placed to support the storage portion, A lifting mechanism is provided that can lift the support portion from the guide portion, The support portion moves integrally with the storage portion in accordance with a change in state of the storage portion, A harvester, wherein the guide portion is provided below a trajectory along which the support portion moves when the state of the storage portion is changed.

2. When the storage unit is operated to the closed state, an entry portion into which the support unit descends and enters is provided in the guide unit, The harvester according to claim 1 , wherein the lifting mechanism lifts the support portion out of the recess.

3. The harvester according to claim 1 or 2, wherein the support portion is a support roller capable of rolling along the guide portion.

4. The lifting mechanism includes: a lifting arm that is pivotable around a second axis along a radial direction relative to the first axis to one side and the other side relative to a vertical line passing through the second axis and that extends downward from the second axis; a lifting roller provided at a lower portion of the lifting arm and capable of rolling along the guide portion; an operating arm that is provided on the lifting arm and that can lift the support part via the lifting arm and the lifting roller by operating the lifting arm to the other side with respect to the vertical line, and is manually operated; The harvester according to any one of claims 1 to 3, further comprising a stopper portion that stops the swinging of the lifting arm to the other side when the support portion is lifted.

5. 5. The harvester according to claim 4, further comprising an extension arm that is detachable from the operating arm and that can extend the length of the operating arm by being attached to the operating arm.

6. A support frame is provided at a lower portion of the storage portion along a direction perpendicular to a radial direction with respect to the first axis, A harvester as described in any one of claims 1 to 5, wherein, in a plan view, the support portion is provided on one of the sides closer to and farther from the first axis relative to the support frame, and the lifting mechanism is provided on the other of the sides closer to and farther from the first axis relative to the support frame.

7. a crop discharge mechanism capable of discharging crops from the storage section is provided at a bottom of the storage section along a radial direction relative to the first axis; A harvester as claimed in any one of claims 1 to 6, wherein, when viewed from a radial direction relative to the first axis, the support portion is provided on one lateral side of the crop discharge mechanism, and the lifting mechanism is provided on the other lateral side of the crop discharge mechanism.

8. The lower part of the storage section is formed in a tapered shape such that the width of the storage section narrows toward the lower side toward the crop discharge mechanism when viewed from a radial direction relative to the first axis, 8. The harvester according to claim 7, wherein the lifting mechanism is provided in an area below the lower portion of the storage section.

9. A harvester as described in claim 7 or 8, wherein, when viewed from a radial direction relative to the first axis, the support portion is provided on the inner side of the body frame relative to the crop discharge mechanism, and the lifting mechanism is provided on the lateral outer side of the body frame relative to the crop discharge mechanism.

10. An intermediate state is set at a position between the closed state and the open state, the intermediate state being located at an end of the vehicle frame; The guide portion is capable of guiding the storage portion between the closed state and the intermediate state, A harvester as described in any one of claims 1 to 9, which is provided with a stop mechanism that can be operated to a blocking position that stops the storage section in the intermediate state when the storage section is operated from the closed state toward the open state, and an allowing position that allows movement of the storage section to the open state and to the closed state in the intermediate state.

11. a biasing mechanism is provided for biasing the stop mechanism to the blocking position; A harvester as described in claim 10, wherein when the storage section is operated from the open state toward the intermediate state, the storage section contacts the stop mechanism in the blocking position, thereby operating the stop mechanism against the biasing mechanism to the permissible position, and when the storage section passes through the intermediate state, the stop mechanism is operated to the blocking position by the biasing mechanism.

12. The harvester according to claim 10 or 11, further comprising an intermediate state holding mechanism capable of holding and releasing the storage section in the intermediate state.

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