Paddy field working machine

Abstract

To provide a paddy field working machine having a simple structure and satisfying both of proper arrangement layout of an operation tool and easy position change of a driver's seat.SOLUTION: A driver's seat 8 on which a driver sits, an operation tool 9,30 disposed in front of the driver's seat 8, and a seat support portion 20 that supports the driver's seat 8 from below are provided. The seat support part 20 has a turning mechanism 25. The turning mechanism 25 is configured to be able to swing the driver's seat between a use position where the driver is seated and a forward-tilted position where the driver's seat is swung forward from the use position. The turning axis X1 of the turning mechanism 25 is inclined so as to be positioned on the front side of the machine body toward one of the right and left sides.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a paddy field working machine. [Background technology]

[0002] The paddy field working machine disclosed in Patent Document 1 is equipped with a driver's seat in which the driver sits. The driver's seat is configured to be able to swing between a usage position where the driver sits and a forward-leaning position where the seat swings forward from the usage position. An operating tool is also arranged in front of the driver's seat. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-141612 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when the driver's seat is moved to a forward-tilting position, the driver's seat may come into contact with the operating device. In this case, it is important that the operating device does not move due to the swinging of the driver's seat. Therefore, a configuration in which the operating device is positioned outside the swinging range of the driver's seat is conceivable. However, this configuration limits the layout of the operating device, potentially making it impossible to achieve optimal operability. Another possible configuration is to restrict the swinging range of the driver's seat so that the driver's seat does not come into contact with the operating device. However, this configuration requires a dedicated component or the like to fix the driver's seat in the forward-tilting position, which is disadvantageous in terms of cost.

[0005] An object of the present invention is to provide a paddy field working machine that has a simple configuration, allows for an appropriate layout of operating tools, and allows for easy repositioning of the driver's seat. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the paddy field working machine of the present invention is provided with a driver's seat in which a driver sits, an operating tool arranged in front of the driver's seat, a pivoting mechanism that can pivot the driver's seat between a usage position in which the driver sits and a forward-leaning position that pivots it further forward than the usage position, and a seat support part that supports the driver's seat from below, and is characterized in that the pivot axis of the pivoting mechanism is inclined so that it is positioned closer to the front of the machine body to one of the left and right sides.

[0007] According to the present invention, the rotation axis of the rotation mechanism for rotating the driver's seat is tilted in the longitudinal direction relative to the lateral direction of the machine body. Therefore, when the driver's seat swings from the use position to the forward-tilted position, the driver's seat is displaced to the other side in the lateral direction of the machine body. This makes it easy to design a structure that avoids interference with operating tools located in front of the driver's seat. This allows for a rice paddy farming machine with a simple structure that achieves both an appropriate layout of operating tools and easy repositioning of the driver's seat.

[0008] In the present invention, the operating device includes a steering handle for steering the vehicle body, and a speed change operating device that is arranged on one of the left and right sides of the steering handle and changes the vehicle speed, and it is preferable that the driver's seat overlaps with the range of movement of the speed change operating device in the left and right direction when viewed from the front of the vehicle body.

[0009] With this configuration, when the driver's seat swings from the use position to the forward tilt position, it is easily possible to configure the driver's seat to be displaced in the left-right direction of the vehicle body away from the speed change operating device.

[0010] In the present invention, it is preferable that the driver's seat is placed and supported on the steering handle when in the forward tilt position.

[0011] With this configuration, the driver's seat is placed and supported on the steering wheel when in the forward tilted position, so that the driver's seat is firmly held in the forward tilted position even without a dedicated holding mechanism for the driver's seat.

[0012] In the present invention, it is preferable that the backrest portion of the driver's seat overlaps with the left-right movable range of the gearshift operating device when in the use position, when viewed from the fore-and-aft direction of the vehicle body, and does not overlap with the left-right movable range of the gearshift operating device when in the forward tilted position.

[0013] With this configuration, the driver's seat does not come into contact with the gear change operating device when the driver's seat swings from the use position to the forward tilt position.

[0014] In the present invention, it is preferable that an armrest on which the driver's arm can be placed is supported on the driver's seat on the side opposite to the side on which the speed change operating device is located.

[0015] With this configuration, contact between the gearshift operating device and the armrest can be easily avoided.

[0016] In the present invention, it is preferable that a material supplying device capable of supplying agricultural materials be disposed adjacent to the rear of the driver's seat.

[0017] With this configuration, when an operator or the like works on the material supply device, a larger working space is secured by the amount corresponding to the operator's seat being tilted forward.

[0018] In the present invention, it is preferable that the seat support portion has a slide mechanism that allows the driver's seat to slide in the front-rear direction, and the rotation mechanism is supported at a front portion of the slide mechanism.

[0019] With this configuration, the driver's seat can be swung from the use position to the forward tilt position regardless of the position of the driver's seat in the fore-and-aft direction.

[0020] In the present invention, the pivoting mechanism preferably has a hinge portion and a swinging frame connected to the driver's seat and capable of swinging around the pivot axis of the hinge portion, and when the driver's seat is in the use position, the rear edge of the swinging frame extends along the lateral direction of the aircraft, and the front edge of the swinging frame extends along the pivot axis.

[0021] This configuration makes it easy to align the portion of the swing frame that connects to the driver's seat using the rear edge as a reference. Also, because the front edge of the swing frame extends along the pivot axis, there is no portion of the swing frame that protrudes excessively forward compared to a configuration in which the front edge of the swing frame extends along the lateral direction of the aircraft. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is an overall side view of a riding rice transplanter. [Figure 2] FIG. 2 is a plan view showing the driver's seat and its surroundings. [Figure 3] FIG. 2 is a right side view of the aircraft body showing the driver's seat and its surroundings in a forward tilted position. [Figure 4] FIG. 2 is a plan view showing the driver's seat and its surroundings in a forward tilted position. [Figure 5] FIG. 2 is a front view of the aircraft showing the driver's seat in the use position. [Figure 6] FIG. 1 is a rear view of the aircraft showing the driver's seat in a forward tilted position. [Figure 7] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 shows a riding rice transplanter A (an example of a rice transplanter), and Fig. 2 shows a plan view of a seedling planting device 5. In these drawings, F indicates the forward direction, B indicates the backward direction, U indicates the upward direction, D indicates the downward direction, R indicates the rightward direction, and L indicates the leftward direction.

[0024] (Overall configuration of riding rice transplanter) As shown in Figure 1, the riding rice transplanter A has a traveling body 3 that travels on right and left front wheels 1 and right and left rear wheels 2. A seedling planting device 5 is supported at the rear end of a link mechanism 4 that extends rearward from the rear of the traveling body 3. A fertilizing device 6 is supported at the rear of the traveling body 3, and a soil leveling device E is disposed in front of the seedling planting device 5.

[0025] A hydraulic cylinder 7 is connected between the rear of the traveling body 3 and the link mechanism 4. The hydraulic cylinder 7 is driven to extend and retract, causing the seedling planting device 5 to rise and fall.

[0026] A driver's seat 8 and a steering handle 9 are provided on the traveling machine body 3. A speed change lever 30 is located on the left side of the machine body relative to the steering handle 9. The driver sits in the driver's seat 8. An armrest 31 on which the driver can rest his / her arm is supported on the backrest on the right side of the driver's seat 8. The steering handle 9 accepts steering operations for the front wheels 1 of the machine body from the driver. The speed change lever 30 is a so-called main speed change lever that accepts vehicle speed change operations from the driver. The main speed change lever is a lever that can continuously change the vehicle speed when traveling while work is being performed by the seedling planting device 5. The steering handle 9 and the speed change lever 30 are operating devices located in front of the driver's seat 8. The speed change lever 30 also corresponds to a "speed change operating device."

[0027] Right and left support frames 10 are connected to the right and left front portions of the traveling body 3. A spare seedling loading tray 11 is provided on these support frames 10. Mat-shaped seedlings to be replenished to the seedling loading tray 18 of the seedling planting device 5 are placed on the spare seedling loading tray 11.

[0028] As shown in Figure 1, the seedling planting device 5 is configured as an 8-row planting type and includes a feed case 12, a support frame 13, multiple planting transmission cases 14, multiple rotating cases 15, multiple planting arms 16, multiple floats 17, and a seedling carrying table 18.

[0029] The feed case 12 is supported at the rear of the link mechanism 4. The support frame 13 is a square pipe extending in the left-right direction and is connected to the feed case 12. The front ends of the multiple (four) planting transmission cases 14 are connected to the support frame 13, and extend behind the traveling body 3.

[0030] The rotating case 15 is supported at the rear of the planting transmission case 14. A pair of planting arms 16 are attached to the rotating case 15.

[0031] The seedling carrying tables 18 are supported by sliding rails 19 provided on the upper surfaces of the multiple planting transmission cases 14. A pair of planting arms 16 attached to the rotating case 15 cuts the seedlings from the lower end of the mat row seedlings placed on the seedling carrying tables 18 and plants them in the rice field G as the rotating case 15 rotates.

[0032] As the traveling body 3 of this riding rice transplanter A advances, the leveling device E levels the rice field surface G. As the traveling body 3 advances, the seedling planting device 5 also drives the seedling loading platform 18 back and forth in the left-right direction. As a result, the planting arm 16 successively cuts out the seedlings from the bottom end of the mat of row seedlings placed on the seedling loading platform 18 and plants them in the rice field surface G.

[0033] (Driver's seat forward tilt mechanism) As shown in FIGS. 1 to 7, the driver's seat 8 of this embodiment is supported by a seat support part 20. The seat support part 20 supports the driver's seat 8 from below. The seat support part 20 has a slide mechanism 21 and a rotation mechanism 25.

[0034] The slide mechanism 21 is configured to allow the driver's seat 8 to slide in the front-to-rear direction. The slide mechanism 21 has an operating lever 22, a guide rail 23, and a slide frame 24. When the driver operates the operating lever 22, the guide rail 23 is unlocked and the slide frame 24 slides forward and backward along the guide rail 23. This allows the driver's seat 8 to slide forward and backward. When the driver releases the operating lever 22, the guide rail 23 is locked and the position of the slide frame 24 is fixed. This fixes the position of the driver's seat 8.

[0035] The rotation mechanism 25 has a fixed frame 26, a swinging frame 27, and a hinge portion 28. The fixed frame 26 is connected to the front portion of the slide frame 24 with bolts. As a result, the rotation mechanism 25 is supported on the front portion of the slide mechanism 21.

[0036] The swing frame 27 is connected with bolts to the front part of the driver's seat 8. The fixed frame 26 and the swing frame 27 are swingably connected by a hinge portion 28, and the swing frame 27 is configured to be swingable relative to the fixed frame 26. In other words, the swing frame 27 is connected to the driver's seat 8 and is configured to be swingable around the rotation axis X1 of the hinge portion 28. As a result, the turning mechanism 25 is configured to be able to change the driver's seat 8 to a forward-inclined position by turning the driver's seat 8 forward.

[0037] That is, the rotation mechanism 25 is configured to be able to swing the driver's seat 8 between a use position where the driver sits and a forward tilt position where the driver's seat 8 swings forward from the use position.

[0038] The fertilizer applicator 6 is disposed adjacent to and behind the driver's seat 8. When the driver or worker performs maintenance work on the fertilizer applicator 6, the driver or worker can tilt the driver's seat 8 forward to easily secure a large working space for the maintenance work. At this time, the backrest of the driver's seat 8 is supported by the steering handle 9.

[0039] Furthermore, when the driver's seat 8 swings rearward from the forward tilted position, the driver's seat 8 is displaced to the use position, and the driver or the like can sit in the driver's seat 8. At this time, the rear of the driver's seat 8 is supported by the support portion 29. The support portion 29 is supported by the rear portion of the slide frame 24. The support portion 29 may be made of an elastic body such as rubber or resin.

[0040] The hinge portion 28 has a shaft member 28A and two insertion holes 28B. The shaft member 28A is provided at the front end of the fixed frame 26. The two insertion holes 28B are provided at the left and right ends of the swingable frame 27. An insertion hole 28h is drilled in each of the two insertion holes 28B, and the shaft member 28A passes through each insertion hole 28h. Four insertion holes 26h are drilled in the fixed frame 26, and the shaft member 28A passes through each insertion hole 26h. The left end 28L of the shaft member 28A is pinned and positioned to the left of the left-end insertion hole 26h. The right end 28R of the shaft member 28A is pinned and positioned to the right of the right-end insertion hole 26h. The two insertion hole portions 28B are located between the two insertion holes 26h on the right side and the two insertion holes 26h on the left side, thereby fixing the shaft member 28A so that it does not come off from the respective insertion holes 26h, 28h.

[0041] 1 to 7, the shaft member 28A swings around the rotation axis X1. The two insertion holes 26h on the left side of the fixed frame 26 are located closer to the front of the machine body than the two insertion holes 26h on the right side of the fixed frame 26. In addition, the four insertion holes 26h in the fixed frame 26 are aligned along the rotation axis X1.

[0042] The pivot axis X1 is inclined forward and backward relative to the lateral direction of the vehicle. Therefore, the left end 28L of the shaft member 28A is located forward of the right end 28R of the shaft member 28A. The shaft member 28A extends in a direction that is closer to the front of the vehicle as it moves to the left side of the vehicle. In other words, the pivot axis X1 of the shaft member 28A is inclined so that it is closer to the front of the vehicle as it moves to the left side of the vehicle. Therefore, when the driver's seat 8 is moved to a forward-tilted position, it is displaced toward the right of the vehicle relative to the state in which the driver's seat 8 is ready to sit, i.e., diagonally right along the inclination direction Y1. Furthermore, as shown in FIG. 6 , when the driver's seat 8 is moved to a forward-tilted position, it is inclined toward the right of the vehicle relative to the state in which the driver's seat 8 is ready to sit.

[0043] The tilt angle of the rotation axis X1 is 4 to 6 degrees with respect to the lateral direction of the aircraft body. Note that the tilt angle of the rotation axis X1 may be, for example, within the range of 3 to 30 degrees.

[0044] The left end 28L and the right end 28R of the shaft member 28A are disposed at the same or substantially the same height on the aircraft body, so that the rotation axis X1 of the shaft member 28A extends horizontally when viewed from the side and front of the aircraft body.

[0045] 2 and 4 to 6, the shift lever 30 has a movable range W1 in which it can swing in the left-right direction of the vehicle body. The driver's seat 8 overlaps with the movable range W1 of the shift lever 30 in the left-right direction when viewed from the front of the vehicle body.

[0046] Because the shaft member 28A is configured to tilt so that it is positioned further forward as it moves to the left side of the aircraft, when the driver's seat 8 is changed to a forward-tilting position, the position of the driver's seat 8 in the left-right direction of the aircraft is displaced to the right side of the aircraft, i.e., to the side opposite the side where the shift lever 30 is located. At this time, the backrest of the driver's seat 8 does not overlap with the left-right movable range W1 of the shift lever 30 when in the forward-tilting position. Therefore, when the driver's seat 8 is changed to a forward-tilting position, it is possible to place the backrest of the driver's seat 8 on the steering wheel 9 with the driver's seat 8 moved away to the right side of the aircraft relative to the shift lever 30.

[0047] That is, when viewed from the fore-and-aft direction of the aircraft, the backrest portion of the driver's seat 8 overlaps with the left-right movable range W1 of the shift lever 30 when in the use position, and does not overlap with the left-right movable range W1 of the shift lever 30 when in the forward tilted position.

[0048] Furthermore, when the driver's seat 8 is tilted forward, the armrest 31 is displaced in the left-right direction of the aircraft body away from the steering wheel 9. This allows the backrest of the driver's seat 8 to be placed on the steering wheel 9 without the armrest 31 getting caught on the steering wheel 9 or the like.

[0049] When the driver's seat 8 is changed to a forward-tilting position, the portion of the driver's seat 8 above the seat surface rests on the steering wheel 9. In this state, the driver's seat 8 is stably supported by both the seat support portion 20 and the steering wheel 9. In other words, the driver's seat 8 rests on and is supported by the steering wheel 9 when in the forward-tilting position.

[0050] Furthermore, when the driver's seat 8 is changed into a seatable state, the driver's seat 8 assumes a position facing along the front of the aircraft body. Therefore, the driver can sit in the driver's seat 8 without feeling uncomfortable.

[0051] As shown in Fig. 7, when the driver's seat 8 is in the use position, the rear edge 27b of the swing frame 27 extends along the lateral direction of the aircraft, and the front edge 27f of the swing frame 27 extends along the rotation axis X1. Therefore, bolt insertion holes in the swing frame 27 for connecting to the driver's seat 8 are drilled based on the rear edge 27b, facilitating alignment of the driver's seat 8 and the swing frame 27. In addition, the front edge 27f of the swing frame 27 extends along the rotation axis X1. With this configuration, there is no portion of the swing frame 27 that protrudes excessively forward, compared to a configuration in which the front edge 27f of the swing frame 27 extends along the lateral direction of the aircraft.

[0052] [Another embodiment] The present invention is not limited to the configurations exemplified in the above-described embodiments, and other representative embodiments of the present invention will be exemplified below.

[0053] (1) In the above-described embodiment, the rotation axis X1 of the shaft member 28A is inclined so as to be positioned closer to the front of the vehicle body toward the left side of the vehicle. This embodiment is not limiting, and the rotation axis X1 of the shaft member 28A may be configured to be inclined so as to be positioned closer to the front of the vehicle body toward the right side of the vehicle. In this configuration, the gear shift lever 30 may be disposed on the right side of the vehicle body relative to the steering handle 9, and the armrest 31 may be supported by the backrest portion on the left side of the driver's seat 8. In other words, it is sufficient that the rotation axis X1 of the turning mechanism 25 is configured to be inclined so as to be positioned closer to the front of the vehicle body toward either the left or right side.

[0054] (2) The shift lever 30 (shift operation device) is a so-called main shift lever that receives vehicle speed change operations from the driver. Without being limited to this embodiment, the shift lever 30 may be a so-called sub-shift lever that changes the vehicle speed (low speed, high speed, etc.) when traveling without work being performed by the seedling planting device 5. Furthermore, the shift operation device is not limited to a lever, and may be a dial, toggle switch, push button switch, slide switch, etc.

[0055] (3) In the above-described embodiment, the fertilizer applicator 6 is disposed adjacent to the rear of the driver's seat 8. However, the present invention is not limited to this embodiment, and a chemical supply device, a seed supply device, or the like may be disposed adjacent to the rear of the driver's seat 8 as a material supply device capable of supplying agricultural materials.

[0056] (4) The armrest 31 may not be provided.

[0057] (5) The above-described slide mechanism 21 may not be provided. In this case, the rotation mechanism 25 may be directly supported by the frame of the traveling body 3.

[0058] (6) In the above-described embodiment, a riding rice transplanter was used as an example of a paddy field working machine. However, the present invention is not limited to this embodiment, and the paddy field working machine may be, for example, a seed sowing machine. Furthermore, a furrow cutter or weeder may be attached to the rear of the link mechanism 4, and the rice transplanter may be used as a furrow cutter or weeder.

[0059] The configurations disclosed in the above-described embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in other embodiments, unless a contradiction arises. Furthermore, the embodiments disclosed in this specification are merely examples, and the present invention is not limited to these, and can be modified as appropriate within the scope of the purpose of the present invention. [Industrial Applicability]

[0060] The present invention is applicable to paddy field working machines. [Explanation of symbols]

[0061] 6: Fertilizer application device (material supply device) 8: Driver's seat 9: Steering handle (operating tool) 20: Seat support 21: Slide mechanism 25: Rotating mechanism 27: Swing frame 27b: Trailing edge 27f: Leading edge 28: Hinge part 29: Support part 30: Gear shift lever (operating device, gear shift operating device) 31: Armrest X1: Rotation axis

Claims

1. A driver's seat in which a driver sits; an operating tool disposed in front of the driver's seat; a seat support part that has a rotation mechanism that can swing the driver's seat between a use position where the driver sits and a forward-inclined position where the driver's seat swings forward from the use position, and that supports the driver's seat from below, The paddy field working machine has a rotation axis of the rotation mechanism that is inclined so that one of the left and right sides is positioned closer to the front of the machine body.

2. the operating tool includes a steering handle for steering the vehicle body, and a speed change operating tool that is disposed on one of the left and right sides of the steering handle and changes the vehicle speed, The paddy field working machine according to claim 1, wherein the driver's seat overlaps with a range of movement of the speed change operating device in the left-right direction when viewed from the front of the machine body.

3. 3. The paddy field working machine according to claim 2, wherein the driver's seat is placed and supported on the steering handle when in the forward tilt position.

4. 3. The paddy field working machine according to claim 2, wherein the backrest portion of the driver's seat overlaps with the left-right movable range of the speed change operating device when in the use position, when viewed from the fore-and-aft direction of the machine body, and does not overlap with the left-right movable range of the speed change operating device when in the forward leaning position.

5. 3. The paddy field working machine according to claim 2, wherein an armrest on which the driver's arm can be rested is supported on the driver's seat on the side opposite to the side on which the speed change operating device is located.

6. 6. The paddy field working machine according to claim 1, wherein a material supplying device capable of supplying agricultural materials is disposed adjacent to the rear of the driver's seat.

7. The seat support portion has a slide mechanism that allows the driver's seat to slide along the front-rear direction, The paddy field working machine according to any one of claims 1 to 5, wherein the pivoting mechanism is supported on a front portion of the slide mechanism.

8. the pivot mechanism includes a hinge portion and a swing frame connected to the driver's seat and swingable around a pivot axis of the hinge portion, A paddy field working machine as described in any one of claims 1 to 5, wherein when the driver's seat is in the use position, the rear edge of the oscillating frame extends along the lateral direction of the machine body, and the front edge of the oscillating frame extends along the pivot axis.

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