JP2004275057A - Agricultural working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sulky rice transplanter which automatically carries out soil preparation operation without making an operator forget the soil preparation operation at a headland (the vicinity of a levee of a field) when reaches a butt. <P>SOLUTION: In the agricultural working machine equipped with an agricultural working device for carrying out fixed agricultural operation while traveling a machine body and a leveling device for carrying out leveling operation on the surface of a field separately from the fixed agricultural operation, when agricultural operation in the vicinity of a levee in the field is recognized by a recognition means, the leveling device is dropped and leveling (soil preparation) operation in a field close to a levee tending to be rough is performed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement of an agricultural work machine such as a seedling transplanter.
[0002]
[Prior art]
A conventional riding rice transplanter, which is a type of seedling transplanter, connects a seedling planting section to a rear portion of a traveling vehicle body via a lifting link mechanism so as to be able to move up and down, and is located in front of the seedling planting device in the seedling planting section. The planting surface of the field is leveled with the float, and the seedlings are planted by the seedling planting device. The seedlings are planted by the planting device on the planting surface that is leveled by the float.
[0003]
In the above configuration, in the seedling planting work of the headland where the traveling vehicle body turned, the amount of movement of mud by the wheels is large and the planting surface of the field has many irregularities, so the float level alone is not enough to level the leveling work, It is difficult to improve the planting accuracy of the vehicle body. For example, the present applicant has previously described the invention disclosed in Japanese Patent Application Laid-Open No. 2002-101714 in front of the float and behind the rear wheels of the traveling vehicle body. Has proposed a riding rice transplanter equipped with a leveling device that can be moved up and down.
[0004]
[Patent Document 1]
JP, 2002-101714, A
[Problems to be solved by the invention]
Although the headland can be leveled using the leveling device of the riding rice transplanter described in Japanese Patent Application Laid-Open No. 2002-101714, even when an operator performing various operations comes to the headland, he forgets to perform the leveling operation. It often happened.
Therefore, an object of the present invention is to provide a riding rice transplanter that performs a leveling operation automatically when it comes to a headland without forgetting a leveling operation at a headland (near a ridge of a field).
[0006]
[Means for Solving the Problems]
The invention according to claim 1 for solving the above-mentioned problem includes a farming device that performs a predetermined farming operation on a field while running an airframe, and a leveling device 28 that performs a leveling operation on a field scene separately from the predetermined farming operation. In the provided agricultural work machine, switching means capable of switching the leveling device 28 between the work state and the non-work state, determination means 44 for determining that the farm work is being performed near the ridge in the field, and determination means 44 On the basis of the judgment, the switching means is an agricultural work machine provided with a control device that brings the leveling device 28 into a working state near the ridge in the field.
[0007]
When the determining means 44 determines that the agricultural work machine is near the ridge in the field, the leveling device 28 is lowered to perform the leveling (leveling) of the field near the ridge which tends to be rough.
[0008]
【The invention's effect】
In the vicinity of the ridge (headland), the field scene is likely to be rough due to the rotation of another agricultural work machine or the main agricultural work machine. However, according to the present invention, the leveling work can be reliably performed near the ridge, Can be optimized.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described. 1 and 2 show a side view and a plan view of a riding rice transplanter (seedling transplanter), respectively, and the overall configuration of the riding rice transplanter (seedling transplanter) will be described.
[0010]
The riding rice transplanter 1 has, for example, a six-row planting planting section 4 mounted on a rear portion of a riding traveling vehicle body 2 via a lifting link device 3 so as to be able to ascend and descend, and is configured as a riding rice transplanter as a whole. I have.
[0011]
The traveling vehicle body 2 includes left and right front wheels 5 and 5 and left and right rear wheels 6 and 6. Front wheel final cases 8, 8 are provided on both left and right sides of a transmission case 7 arranged at the front of the fuselage, and front left and right front wheels 5, 5 are attached to front wheel shafts projecting laterally from the lower part of the front wheel final cases 8, 8. 5 is attached. Further, the front end of the main frame 9 is fixed to the rear part of the transmission case 7, and the rear wheel gear case 10, 10 can be freely rolled at the center of the rear end of the main frame 9 with the horizontal rear wheel rolling shaft as a fulcrum. The left and right rear wheels 6, 6 are mounted on a rear axle that supports and then projects laterally from the rear wheel gear cases 10, 10.
[0012]
The engine 11 is mounted on the main frame 9, and rotational power is taken out from an engine output shaft projecting from the left side of the engine 11, and the rotational power is transmitted to a hydraulic pump (not shown) via the first belt transmission 12. The power is transmitted to the drive shaft, and further transmitted to the transmission case 7 via a second belt transmission 13 capable of continuously variable transmission.
[0013]
The rotational power transmitted to the transmission case 7 is shifted by a main transmission (not shown) in the case 7 to branch into running power and work machine power, which is taken out, and the running power is passed through the front wheel final cases 8, 8. The power is transmitted to the left and right front wheels 5 and 5, and is transmitted to the left and right rear wheels 6 and 6 via the rear wheel gear cases 10 and 10. Further, the power of the working machine is transmitted from the PTO shaft 14 to the seedling planting section 4 via the work machine transmitting shaft 15 which can be freely bent to drive the operating section.
[0014]
The upper part of the engine 11 is covered with an engine cover 16, and a cockpit 17 is provided on the engine cover 16. A steering wheel 18 for steering the left and right front wheels 5 and 5 is provided in front of the cockpit 17, and a spare seedling mounting table 19 for mounting replenishing seedlings is provided on both front left and right sides of the traveling vehicle body 2.
[0015]
The elevating link device 3 has a parallel link configuration and includes one upper link 3a and a pair of left and right lower links 3b, 3b. The base sides of these links 3a, 3b, 3b are rotatably supported on a link front frame 20 erected at the rear end of the main frame 9, and the link rear frames 21 are mounted on the distal ends of the links 3a, 3b, 3b. Are linked.
Then, the seedling planting section 4 is mounted on the frame 21 after linking in a freely rolling manner.
[0016]
A hydraulic elevating cylinder 23 is interposed between the support member fixed to the main frame 9 and the tip of the swing arm 22 integrally formed with the upper link 3a, and the hydraulic elevating cylinder 23 is expanded and contracted by hydraulic pressure, thereby connecting the upper link 3a. The seedling planting part 4 connected to the frame 21 after linking is moved up and down in a substantially constant posture by rotating up and down. The hydraulic lift cylinder 23 is controlled to expand and contract by a hydraulic lift valve (not shown) provided on the traveling vehicle body 2.
[0017]
The seedling planting section 4 includes, for example, a seedling mounting table 24 that supplies seedlings to a predetermined seedling outlet one by one by six-row planting, and six sets of seedlings that plant seedlings supplied to the seedling outlet in a field. , A seedling stand 24 and a transmission frame 26 for supporting and transmitting power to the seedling planting devices 25, 25, ..., and leveling the field surface prior to seedling planting. A center float 27a and left and right floats 27b and 27c are provided.
[0018]
Next, FIG. 3 shows a plan view of the seedling planting section 4 and FIG. 4 shows a side view of the leveling device 28. The leveling device 28 of the seedling planting portion 4 will be described with reference to these drawings.
[0019]
The leveling device 28 includes a central leveling plate 28a, and left and right leveling plates 28b and 28c detachably attached to left and right sides of the central leveling plate 28a. The center leveling plate 28a and the left and right leveling plates 28b and 28c are arranged in front of the seedling planting section 4 and behind the traveling vehicle body 2, and attached to the seedling planting section 4 side. I have.
[0020]
The center float 27a of the seedling planting part 4 is arranged ahead of the left and right floats 27b and 27c, the center leveling plate 28a is arranged close to the front of the center float 27a, and the left and right rear wheels 6 , 6 and the lower links 3b, 3b. The left and right leveling plates 28b, 28c attached to the center float 27a via the central leveling plate 28a are arranged on the rear slope such that their left and right outer free ends are sequentially located rearward, and It is arranged inside the left and right rear wheels 6,6.
[0021]
When the left and right rear wheels 6, 6 and the left and right auxiliary wheels 29, 29 (FIG. 3) are mounted on the traveling vehicle body 2, the left and right rear grounding plates 28b, 28c are attached to the left and right grounding plates 28b, 28c. The relationship is such that the auxiliary wheels 29, 29 are located. Therefore, when attaching the left and right auxiliary wheels 29, 29, the left and right leveling plates 28b, 28c are removed, and only the center leveling plate 28a is attached to perform seedling planting work.
[0022]
The rear ends of a pair of left and right support arms 32, 32 are pivotally supported on left and right brackets 30, 30 attached to the transmission frame 26 of the seedling planting section 4 via pins 31, 31 so as to be vertically rotatable. The center leveling plate 28a of the leveling device 28 is attached to the front ends of the arms 32,32. Springs 33, 33 are interposed between the bracket 30 and the support arms 32, 32 to support the support arms 32, 32 along a front-rear direction with no load applied in the vertical direction. When a predetermined load is applied to the upper and lower portions 32, 32, they are retracted and rotated downward.
[0023]
The rear ends of the L-shaped switching arms 34, 34 are supported by pins 34a, 34a on left and right brackets 30, 30 attached to the transmission frame 26. The upper surfaces of the bases of the support arms 32, 32 are pressed by the L-shaped portions at the front ends of the switching arms 34, 34. The switching arms 34, 34 can be switched between a lower leveling position and an upper non-leveling position via the ridge clutch lever 35 or the leveling depth switching lever 41 shown in FIG.
[0024]
Further, in this embodiment, as shown in FIG. 4, a support pin 39 on the side of the center leveling plate 28a is fitted and held in a vertical cylindrical portion 38 at the front end of the support arms 32, 32, For example, it can be adjusted up and down in five stages and fixed. Therefore, the leveling angle of the center leveling plate 28a and the left and right leveling plates 28b and 28c can be adjusted up and down with respect to the center float 27a without changing the leveling angle, and stable leveling work can be performed.
[0025]
3, an electric motor 37 is attached to one bracket 30 attached to the transmission frame 26, and the output shaft of the electric motor 37 passes through a one-way clutch 36. And a driving force is output to the pin 31.
[0026]
With the above configuration, as shown in the flowchart of FIG. 5, when the leveling device 28 is set to level the ground by operating the ridge clutch lever 35 (or the leveling depth switching lever 41 or the leveling rake operation switch 42), the electric motor 37 rotates forward and the lower sides of the switching arms 34, 34 push the upper surfaces of the support arms 32, 32 by the L-shaped portion at the front end of the switching arms 34, and are supported against the urging forces of the springs 33, 33. The arms 32, 32 rotate downward with the pins 31, 31 as fulcrums, and lower the leveling plates 28a, 28b, 28c. When a ridge or a field is detected by the field detection sensor 44 (FIG. 4) (when the tip of the field detection sensor 44 contacts the field, the potentiometer 45 operates to detect the field), the normal rotation of the electric motor 37 is stopped. . At this time, since the one-way clutch 36 is provided, the leveling plates 28a, 28b, and 28c stop at the downward movement stop positions of the leveling plates 28a, 28b, and 28c, so that the leveling operation can be performed on the leveling plates 28a, 28b, and 28c.
[0027]
Conversely, when the leveling device 28 is not to be leveled by operating the ridge clutch lever 35 (or the leveling depth switching lever 41 or the leveling rake operation switch 42), the electric motor 37 rotates in the reverse direction and the switching arms 34, 34. Is rotated upward to raise the leveling plates 28a, 28b, 28c to predetermined positions and stop. The predetermined stop positions of the leveling plates 28a, 28b, and 28c are performed when the end of the switching arm 34 comes into contact with a rake limit switch 47 (FIG. 4) provided at the bottom of the bracket 30.
[0028]
As described above, the leveling device 28 can be switched between the arranging position in the working state and the arranging position in the non-working state by not only the ridge clutch lever 35 but also the leveling depth switching lever 41 or the leveling rake operation switch 42. The leveling device 28 can be put into the working state based on the determination means (field detection sensor 44) that determines that the farm work is being performed near the ridge in the field.
[0029]
The leveling device 28 does not need to be operated in a normal planting process due to a problem of mud pushing. However, in the vicinity of a ridge (headland), another riding rice transplanter or a main riding rice transplanter may turn. In this case, the field scene is easily roughened, so that the present embodiment enables the leveling (leveling) work to be performed reliably near the ridge, and the agricultural work can be optimized.
[0030]
In addition, it is desirable to use the leveling device 28 not only at the time of headland work but also when operating a row clutch for planting seedlings at a low speed.
[0031]
In this embodiment, the central float 27a is also used as a sensor float to detect the distance of the seedling planting part 4 from the ground surface and control the raising and lowering of the seedling planting part 4. The center leveling plate 28a is disposed in front of the left and right leveling plates 28b and 28c attached to the center leveling plate 28a. It is made to approach both sides, and it surrounds the front part of the center float 27a with the center leveling board 28a and the left and right leveling boards 28b and 28c.
[0032]
Therefore, the small unevenness can be leveled by the central leveling plate 28a to improve the sensing accuracy as the sensor float, and the mud raised by the left and right rear wheels 6, 6 can be removed from the left and right leveling plates 28b, By 28c, it can be led to the wheel trace on the outer side and can be neatly leveled, and the seedling planting accuracy can be improved.
[0033]
As shown in the perspective view of FIG. 6A, the groove width of the portion (a) corresponding to the center float 27a of the center leveling plate 28a is reduced, and the groove width of both sides (b) is widened. By reducing the inflow of mud into the center float 27a, the leveling properties can be stabilized.
[0034]
As shown in the perspective view of FIG. 6 (b), the groove of the portion (a) corresponding to the center float 27a of the central leveling plate 28a is eliminated, and a groove is provided only on both sides (b). May be. This is because the ground leveling plate 28a at the portion (a) corresponding to the center float 27a is more stable when the mud is not exposed.
[0035]
FIG. 7 is a schematic plan view of a driving main portion of the seedling planting section 4. The transmission frame 26 is provided with two right and left seedling planting devices 25, 25 via the transmission mechanism. The transmission frame 26 is provided with a traverse switching gear 51 capable of changing the amount of lateral movement (moving speed) in four stages, and the output of the gear 51 is interlocked with all the seedling planters 25, 25. I have. Further, a lateral feed moving rod 52 for moving the seedling mounting table 24 in the left-right direction is provided. The lateral feed moving rod 52 is a lead cam shaft 54 that rotates with power from a transmission input unit to the seedling planting unit. The reciprocating movement is performed in the left-right direction by driving the lateral feed lead cam 55.
[0036]
The right and left two seedling planting devices 25, 25 are transmitted from the left and right main transmission shafts 56 via respective seedling planting device transmission parts (transmission chains) 57.
Each ridge clutch 53 is provided between the main transmission shaft 56 and the seedling plant transmission unit (transmission chain) 57, and the ridge clutch 53 is turned on and off by operating each ridge clutch lever 35. The operation of the two seedling planting devices 25, 25 is individually turned on and off.
[0037]
As shown in FIGS. 8 and 9 in a side view and a plan view of a drawing marker portion of the riding rice transplanter, in this embodiment, an electric motor driven drawing marker 80 is used. In the configuration of the electric marker, the support frame 61 has a configuration in which the marker frame 79 can be bent so that the marker frame 79 can be housed in the horizontal direction along the side of the body around the connection portion with the support frame 61. A marker arm 82 is connected to a tip of the marker arm 82 so as to be freely bent by a marker motor 89.
[0038]
A bracket 88 is attached to the action portion of the marker frame 79, a marker motor 89 is provided on the bracket 88, and a pinion 90 attached to the rotation shaft of the motor 89 and a circular gear 91 provided at the base of the marker arm 82 are provided. Are engaged.
By the rotation of the gear 91, the marker sensor 92 attached to the bracket 88 can detect the amount of rotation of the marker arm 82, and the marker arm 82 is moved to the horizontal position where the marker arm 82 is at the drawing position (when the drawing action section 83 is in the field). When the movement is completed, the marker motor 89 stops rotating, the marker arm 82 is raised, and the marker is moved to the dotted line position (marker non-drawing position) or the dot-dash line position (marker storage position) in FIG. After moving the arm 82, it can be stopped.
[0039]
In addition, the control of the amount of rotation of the marker arm 82 to the storage position of the marker arm 82 (the position indicated by the one-dot chain line) is performed by a marker storage comprising a pair of proximity sensors (not shown) provided at the respective ends of the marker frame 79 and the marker arm 82. This can be performed using the sensor 93. When the marker arm 82 is rotated to the storage position indicated by the dashed line, the pair of proximity sensors comes to the closest position. At this time, the marker storage sensor 93 is turned on, so that the marker arm 82 is rotated to the marker storage position. It can be seen that was performed.
[0040]
A limit switch 62 is provided at the connection between the marker frame 79 and the support frame 61. When the marker frame 79 starts to be bent with respect to the support frame 61, the switch 62 is turned off, and the marker motor is turned on via a controller (not shown). 89 is operated to store the drawing marker 80.
[0041]
In the present embodiment, when the electric drawing marker 80 hits a ridge or the like even during drawing while farming, and the marker frame 79 is bent horizontally along the side of the machine body around the connection portion with the support frame 61, the controller is operated. It is characterized in that the drawing marker 80 is automatically raised to the one-dot chain line position (marker storage position) in FIG.
[0042]
Even if the drawing marker 80 hits a ridge or the like and bends to a horizontal position and is stored on the side of the body, if the work such as planting a seedling is continued, the drawing marker 80 may interfere with the wheel 6 and be damaged. When the configuration is such that the drawing marker 80 is automatically switched to the raised position, there is no possibility of breakage.
[0043]
When the marker frame 79 of the drawing marker 80 is turned backward by the load of the field during the drawing operation by the drawing marker 80, the lowering angle of the marker arm 82 with respect to the horizontal is controlled to be slightly increased. Does not enter deeply into the field, it is possible to prevent the drawing marker 80 from being stored without permission due to the load on the field during the planting operation.
[Brief description of the drawings]
FIG. 1 is a side view of a riding rice transplanter (seedling transplanter) according to an embodiment of the present invention.
FIG. 2 is a plan view of the riding rice transplanter of FIG.
FIG. 3 is a plan view of a seedling planting part of the riding rice transplanter of FIG. 1;
FIG. 4 is a side view of a main part of a seedling planting section of the riding rice transplanter of FIG. 1;
FIG. 5 is an operation flowchart of the leveling device of the riding rice transplanter of FIG. 1;
FIG. 6 is a perspective view of the leveling device of the riding rice transplanter of FIG. 1;
FIG. 7 is a schematic plan view of a drive unit of a seedling planting unit of the riding rice transplanter of FIG. 1;
FIG. 8 is a side view of a drawing marker portion of the riding rice transplanter of FIG. 1;
FIG. 9 is a plan view of a drawing marker portion of the riding rice transplanter of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Riding rice transplanter 2 Running vehicle body 3 Elevating link device 3a Upper link 3b Lower link 4 Seedling planting part 5 Front wheel 6 Rear wheel 7 Transmission case 8 Front wheel final case 9 Main frame 10 Rear wheel gear case 11 Engine 12 First belt transmission 13 Second belt transmission device 14 PTO shaft 15 Work implement transmission shaft 16 Engine cover 17 Cockpit 18 Handle 19 Spare seedling stand 20 Link before frame 21 Link after frame 22 Swing arm 23 Hydraulic elevating cylinder 24 Seedling stand 25 Seedling planting device 26 Transmission frame 27a Central float 27b Left float 27c Right float 28 Leveling device 28a Central leveling plate 28b Left leveling plate 28c Right leveling plate 29 Auxiliary wheel 30 Bracket 31 Pin 32 Support arm 33 Spring 34 Switching arm 34a Pin 35 Ridge clutch lever 3 One-way clutch 37 Electric motor 38 Tubular part 39 Support pin 40 Lock device 41 Land leveling depth switching lever 42 Leveling rake operation switch 44 Field detection sensor 45 Potentiometer 47 Limit switch 51 Lateral feed switching gear 52 Moving rod 53 Row clutch 54 Lead cam shaft 55 Lead cam 56 Main transmission shaft 57 Transmission chain 61 Support frame 62 Limit switch 79 Marker frame 80 Draw marker 82 Marker arm 83 Draw action section 88 Bracket 89 Marker motor 90 Pinion 91 Circular gear 92 Marker sensor 93 Marker storage sensor

Claims (1)

In a farm work machine that performs a predetermined farm work on a field while running a machine body, and a farm work machine provided with a leveling device 28 that performs a leveling work in a field scene separately from the predetermined farm work,
A switching unit capable of switching the leveling device 28 between a work state and a non-working state, a determination unit 44 for determining that the farming operation is being performed near a ridge in a field, and based on the determination by the determination unit 44, An agricultural working machine characterized in that the switching means is provided with a control device that brings the leveling device 28 into a working state near a ridge in a field.

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