JPH0745049U - Rice transplanter - Google Patents

Abstract

(57) [Summary] [Purpose] It is not necessary to consider the difference in sensor characteristics compared to the conventional configuration in which grounding sensors are arranged on the left and right sides, and because it is a single sensor, rolling control is possible. A link mechanism with the switching valve (33) can be easily formed. [Structure] The working device (3) attached to the traveling machine body (34) is driven to roll based on the sensor operation associated with the fluctuation of the ground pressure of the float (21), so that the working device (3) has a ground posture. In a rice transplanter equipped with a rolling control cylinder (40) for maintaining constant
Operation member (28) of the rolling control switching valve (33)
And a drive member (24) standing upright from a single floating float (21) for converting the rolling operation of the drive member (24) into the operation movement of the operation member (28) and transmitting the same. It is characterized in that the drive member (24) is mechanically directly connected via interchange mechanisms (29) and (30) which allow the vertical movement of the drive member (24).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rice transplanter equipped with a seedling mount and a planting claw.

[0002]

[Prior art]

 Conventionally, a rolling sensor for detecting the tilt of the machine body in the left-right direction, that is, rolling, has been separately installed on both left and right sides of a leveling float which is a main float as described in Japanese Utility Model Publication No. 52-145127.

[0003]

[Problems to be solved by the device]

 However, with the above-mentioned means, since the sensor for detecting the ground pressure is small, the sensitivity is poor, and the difference in the ground pressure sensitivity between the left and right rolling sensors is liable to occur, and the operation of the sensor that detects rolling and the actual There was a problem that there was a considerable difference between the aircraft and the tilt.

[0004]

[Means for Solving the Problems]

 Therefore, the present invention provides a rolling control cylinder for maintaining a constant posture of the working device above ground by rolling the working device attached to the traveling machine body based on the sensor operation associated with the fluctuation of the ground pressure of the float. In a rice transplanter equipped with a switch, the operation member of the rolling control switching valve and the drive member erected from a single rolling-operated float are converted from the rolling operation of the drive member into the operation movement of the operation member. In order to transmit the above, the drive member is mechanically directly connected via a flexible mechanism that allows the drive member to move up and down. When the float rolls due to fluctuations in ground pressure, the drive member also rolls together. However, the amount of displacement of the drive member due to the rolling operation is converted into the operation movement of the operation member, and the vertical movement amount of the drive member is operated by the interchange mechanism. Since the rolling control switching valve is actuated to perform rolling control without being transmitted to the material, the mechanical linkage mechanism that transmits the mechanical displacement of the float to the rolling control switching valve is adopted. Since it is not necessary to use electrical detection means, it is possible to avoid contact failure due to the effect of muddy water, etc. possessed by the electrical sensor, and a single float is used as the grounding sensor for detection. It is not necessary to consider the difference in sensor characteristics compared to the conventional configuration in which a grounded sensor is arranged for detection, and since it is a single sensor, the linkage mechanism with the rolling control switching valve can be easily formed. In addition, as the linking mechanism, the driving member standing upright from the float and the operating member of the control switching valve are directly connected to each other, so that the linking mechanism can be simplified and rattling at the linking portion can be achieved. Obtained by eliminating the inaccuracies of control due to, those that transmits the rolling operation of the float to ensure that the switching valve obtained, may constitute a rolling control more reliable high casting.

[0005]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a partially enlarged side view, FIG. 2 is a side view of a walk-behind rice transplanter, and FIG. 3 is a plan view thereof. In the figure, (1) is an engine, (2) is a mission case, and (3) is the mission case. A planting case connected to (2) via a transmission case (4), (5) a bonnet covering the upper side of the rice transplanter body constituted by the engine (1) and the cases (2), (3) and (4), (6) is a spare seedling mounting table provided on the rear upper surface of the bonnet (5), (7) is a steering handle that is connected to the planting case (3), and (8) is above the handle (7). Front low rear high seedling mount which is reciprocally slidably attached to the left and right via guide rails (9) and (10), and (11) is attached to the planting case (3) to attach the seedling mount (8). The lateral feed shaft for lateral feed drive, (12) is attached to the planting case (3) via the planting arm (13). A planting claw for mounting and picking up one seedling from the seedling mounting table (8) for planting, and (14) is a pair of left and right supporting up and down the swing case (15) in the mission case (2). Paddy running wheels (16) are connected to the swing cases (15) and (15) via left and right rods (17) and (17) to control the left and right running wheels (14) and (14) in and out. A hydraulic cylinder, (18) is a front float that hangs up and down below the engine (1) and the mission case (2) via front and rear links (19) and (20), and (21) is the planted part. The rear float is provided between the left and right running wheels (14) (14) below the case (3) and the steering wheel (7).

As shown in FIGS. 1 and 4 to 6, a link (23) in which a planting depth adjusting lever (22) is continuously provided and a rolling sensor which is a rolling sensor for detecting a lateral tilt of a rice transplanter body. The sensor arms (24) and (24) respectively support the rear side and the front side of the rear float (21). Further, the pitching sensor arm (25), which is a pitching sensor for detecting the tilting of the rice transplanter in the front-rear direction, is brought into contact with the upper surface of the front float (18), and the change in the planting depth and the pitching operation of the airframe are performed by the front float (1). 8) and the change in the space between the airframes.

In addition, a receiving cylinder (28) is laterally installed above the transmission case (4) via a bracket (26) and a rolling fulcrum shaft (27), and is rotatably inserted in the receiving cylinder (28). The base ends of the input links (30) and (30) are fixed to both ends of the shaft (29), and the upper ends of the rolling sensor arms (24) and (24) are connected to the tips of the links (30) and (30). A rolling arm (31) is erected on a vertical line connecting a fulcrum shaft (27) in the middle of the receiving cylinder (28), and a rolling rod (32) connecting one end to the arm (31) and the other end to a rolling hydraulic switching valve. When connected to the spool (33a) of (33), the left and right sensor arms (24) and (24) move up and down in substantially the same direction, and the left and right input links (30) and (30) are centered on the rolling shaft (29). Rock on While holding the pressure switching valve (33) neutral, when the left and right sensor arms (24) (24) move in different directions or when only one of the sensor arms (24) moves up and down, the left and right links (30) (30) ), The receiving cylinder (28) is swung about the rolling fulcrum shaft (27) to move the spool (33a) forward and backward to switch the switching valve (33).

Further, a receiving cylinder (35) is fixedly mounted on a vehicle body frame (34) on which the engine (1) is mounted, and the base end of the pitching sensor arm (25) is swingably attached to the receiving cylinder (35). Is inserted and supported, and the other end of the arm (25) is connected to the spool switching arm (39) of the pitching hydraulic pressure switching valve (38) via the swing link (36) and the pitching link (37). When the distance between the machine body and the front float (18) where the planting claw (12) planting depth changes due to the unevenness of the cultivator etc., this is detected by the sensor arm (25) and the switching is performed. The valve (38) is configured to be switched.

The hydraulic switching valves (33) and (38) actuate and control the rolling hydraulic cylinder (40) and the pitching hydraulic cylinder (16). The swing plate (42) is connected to and supported by the piston rod (16a) of the cylinder (16) through the swing fulcrum shaft (41), and both ends of the plate (42) are supported by the left and right rods (17) (17). 15) The rolling hydraulic cylinder (40) connected to the rolling rod (44) via a swing fulcrum shaft (44) between a fixed mounting plate (43) mounted on the piston rod (16 a) side and the swing plate (42). ) And the piston rod (40a), and the swing is controlled by controlling the pitching hydraulic cylinder (16). While sliding the slide plate (42) in the front-rear direction to simultaneously change the support heights of the left and right wheels (14) (14) with respect to the machine body to maintain the seedling planting depth substantially constant, the rolling hydraulic cylinder ( 40), the swing plate (42) is horizontally swung about the fulcrum shaft (41) and the left and right rods (17) and (17) are pushed in different directions to support the left and right wheels (14) and (14). Different heights are used to keep the rice transplanter substantially horizontal.

As is apparent from the above, the planting case (3), which is a working device attached to the vehicle body frame (34) that is the traveling body, is based on the sensor operation that accompanies the ground pressure fluctuation of the float (21). In a rice transplanter provided with a rolling control cylinder (40) that keeps the grounding posture of the planting case (3) constant by rolling and driving the planting case (3), it is an operation member of the rolling control switching valve (33). A cylinder (28) and a rolling sensor arm (24), which is a drive member erected from a single float (21) that performs a rolling operation, and a rolling operation arm of the rolling sensor arm (24). And the rolling shaft (29), which is a flexible mechanism allowing the vertical movement of the rolling sensor arm (24), to be transmitted after being converted into the operation movement. It is mechanically directly connected via a force link (30), and when the float (21) rolls due to fluctuations in ground pressure, the rolling sensor arm (24) also rolls integrally, and this sensor arm (24) ) The amount of displacement due to the rolling operation is converted into the operation movement of the receiving cylinder (28), and the vertical movement amount of the rolling sensor arm (24) is transferred to the receiving cylinder (28) by the rolling shaft (29) and the input link (30). Is not transmitted, and the rolling control switching valve (33) is activated to perform rolling control.

The lower end pressure sensing portion (25a) of the pitching sensor arm (25) is in contact with the buoyancy center position (A) of the front float (18), and the upper and lower parts of the front float (18) are moved up and down. The movement is accurately detected by the sensor arm (25) and the sensitivity is improved.

The present embodiment is configured as described above, and during the rice planting operation, the depth of the rice planting surface changes due to unevenness of the tiller, etc., so that the front float (18) is approximately parallel to the rice planting surface. ) The entire equipment goes up and down to come in contact with and separate from the airframe, and the pitching hydraulic cylinder (16) is controlled by the swing of the sensor arm (25) that interlocks with the front float (18) to move the traveling wheel (14) in and out. It is used to raise and lower the aircraft to keep the planting depth approximately constant. Also, when the aircraft tilts to the left or right on a shore or a sloping ground, the rear hydraulic float (21) swings up and down with respect to the aircraft. 40) is operated and controlled so that the left and right wheels (14) (14) are moved up and down to have different support heights so that the rice transplanter body is kept substantially horizontal and the left and right planting depths are kept substantially constant.

Further, by separating the front and rear floats (18) and (21), even if the planting depth is changed by the adjusting lever (22), there is little influence on pitching and stable pitching performance is maintained. be able to.

[0014]

EFFECTS OF THE INVENTION As is clear from the above embodiments, according to the present invention, the working device (3) attached to the traveling vehicle body (34) is rolled based on the sensor operation accompanying the ground pressure fluctuation of the float (21). In a rice transplanter equipped with a rolling control cylinder (40) for maintaining the posture of the working device (3) above ground constant by driving, an operating member (28) of a rolling control switching valve (33) and a rolling control cylinder (40). A drive member (24) provided upright from a single float (21) to be operated, for converting the rolling operation of the drive member (24) into an operation movement of an operation member (28) and transmitting the same. It is mechanically directly connected through a flexible mechanism (29) (30) that allows the vertical movement of (24), and when the float (21) rolls due to fluctuations in ground pressure, it is driven. The moving member (24) also performs a rolling operation integrally, and the amount of displacement of the driving member (24) due to the rolling operation is converted into the operation movement of the operating member (28), and the vertical movement amount of the driving member (28) is an interchange mechanism. (29) (30) is not transmitted to the operating member (28) and the rolling control switching valve (33) is operated to perform rolling control, so that the mechanical displacement of the float (21) is switched to rolling control. By adopting a mechanical linking mechanism that transmits to the valve (33), it is not necessary to employ a means for electrically detecting as in the conventional case, and contact failure etc. due to the influence of muddy water etc. possessed by the electric sensor can be avoided. In addition, since a single float (21) is used as the grounding sensor for detection, differences in sensor characteristics are taken into consideration compared to the conventional configuration in which grounding sensors are arranged on the left and right sides for detection. Since there is no need and since it is a single sensor, a linkage mechanism with the rolling control switching valve (33) can be easily formed, and further, as a linkage mechanism, a drive member (standing upright from the float (21) ( 24) and the operation member (28) of the control switching valve (33) are directly connected to each other, the linkage mechanism can be simplified, and the control inaccuracies due to rattling at the linkage portion can be eliminated, and the float ( The rolling operation of 21) can be reliably transmitted to the switching valve (33), and the rolling control can be made more reliable.

[Brief description of drawings]

FIG. 1 is a partially enlarged side view.

FIG. 2 is an overall side view of the rice transplanter.

FIG. 3 is a plan view of the same.

FIG. 4 is a partially enlarged plan view.

FIG. 5 is an explanatory diagram of a pitching sensor unit.

FIG. 6 is an explanatory diagram of a rolling sensor unit.

[Explanation of symbols]

 (3) Planted case (working device) (24) Rolling sensor arm (driving member) (28) Receptacle (operating member) (29) Rolling shaft (flexing mechanism) (30) Input link (flexing mechanism) (33) Rolling control switching valve (34) Body frame (travel vehicle) (40) Rolling control cylinder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Takahashi 1-32 Chayamachi, Kita-ku, Osaka Yanmar Agricultural Machinery Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A working device (3) attached to a traveling machine body (34) is driven to roll based on a sensor operation associated with a fluctuation in ground pressure of a float (21).
In a rice transplanter provided with a rolling control cylinder (40) for maintaining a constant attitude of the working device (3) to the ground, an operating member (2) of a rolling control switching valve (33).
8) and a drive member (24) provided upright from a single rolling operation float (21) for converting the rolling operation of the drive member (24) into the operation movement of the operation member (28) and transmitting the operation movement. A rice transplanter mechanically directly connected to the drive member (24) through interchange mechanisms (29) and (30) that allow vertical movement of the drive member (24).