JP2961407B2 - Rice transplanter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter equipped with a seedling mounting table and planting claws. [0002] Conventionally, Japanese Utility Model Application Laid-open No. Sho 54-2
As disclosed in Japanese Patent Publication No. 7022, a single float for flattening a flat surface provided between left and right running wheels is rotatably provided around a longitudinal axis, and the rotation of the float about the longitudinal axis is detected to automatically operate a hydraulic cylinder. There is a technology to perform rolling control by actuating, but since a left and right hydraulic cylinder and a left and right hydraulic switching valve for operating each cylinder are provided and the left and right hydraulic switching valve is connected to the float, a structure that detects rolling by the left and right floats is used. In order to prevent the switching timing of the rolling control from being different depending on the rolling direction, the switching timing of the left and right hydraulic switching valves and the left and right hydraulic cylinders can be prevented even if the problem that the rolling is erroneously detected due to the weight difference due to the mud adhesion of the left and right floats is eliminated. It is necessary to keep the hydraulic oil pressure etc. of the hydraulic cylinders at almost the same level. Maintenance and repair work involving adjustment of the hydraulic oil pressure of the floater cannot be easily achieved, and the hydraulic switching valve is switched by each operation of vertical lifting and lowering and rolling of the float. The operation is frequently performed, and there is a problem that the oil seal structure for preventing oil leakage of the hydraulic switching valve is simplified and the durability is improved, and the handling efficiency is not easily improved due to a reduced frequency of maintenance and inspection work. [0003] However, the present invention provides a single float for flattening the flat surface provided between the left and right running wheels so as to be rotatable about the longitudinal axis, and the float is provided around the longitudinal axis. Providing a single rolling hydraulic switching valve for switching by detecting rotation, and providing a connecting member for stopping the switching valve for a substantially vertical lifting operation of the float and for switching the switching valve by the rolling operation of the float, A single hydraulic cylinder for rolling is automatically operated to perform rolling control, and a left-right direction provided on a rear view portal-shaped link fixed to a planting depth adjusting lever base.
On a shaft, on a U-shaped cradle in side view fixed to the upper surface of the rear float
A single float is used to detect the rolling direction and switch a single hydraulic switching valve to operate a single hydraulic cylinder to perform rolling control in both the left and right directions. Compared to the conventional structure in which the left and right hydraulic cylinders are operated via the switching valve, it is possible to easily prevent a difference in the rolling control timing depending on the left or right rolling direction, and the switching timing of the hydraulic switching valve and the hydraulic oil of the hydraulic cylinder It is possible to easily improve maintenance and repair workability with adjustment of pressure and the like, and to easily prevent switching of the hydraulic switching valve by an operation other than the rolling operation of the float, and to perform switching operation of the hydraulic switching valve. The frequency is lower than before, simplifying the oil seal structure of the hydraulic switching valve and facilitating handling such as maintenance and inspection work. When changing the planting depth by operating the planting depth adjusting lever, the vertical axis is moved up and down, so the planting depth can be adjusted without changing the horizontal inclination of the float, and the rolling control malfunctions due to the planting depth adjustment U-shaped pedestal in side view and rear view
The gate-shaped link is connected by the longitudinal axis and the lateral axis.
Since so to form a universal joint mechanism, the float and planting
The connection of the depth adjustment lever is for rolling the rear float
Or easily prevent squeezing by pitching
And a simplified arrangement of the connection structure between the float and the lever
It is easy to aim to give shall like rigidity improved. Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a partially enlarged side view, FIG. 2 is a side view of a walking rice transplanter, and FIG. 3 is a plan view of the same, wherein (1) is an engine, (2) is a transmission case, and (3) is the transmission case. (2) a planting case connected to a transmission case (4) via a transmission case (4); (5) a bonnet covering the upper side of the rice transplanting machine 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 hood (5), (7) is a steering handle connected to the planting case (3), and (8) is above the handle (7). A low-back high seedling mounting table which is slidably mounted to the left and right through the guide rails (9) and (10).
1) is a transverse feed shaft mounted on the planting case (3) to drive the seedling mounting table (8) transversely, and (12) is mounted on the planting case (3) via a planting arm (13). Planting claw for taking out and planting one seedling of seedling from the seedling mounting stand (8), (1
4) A pair of left and right paddy traveling wheels supported on the mission case (2) via a swing case (15) so as to be movable up and down, and (16) are the swing cases (15) and (15).
A hydraulic cylinder for pitching which is connected to right and left rods (17) and (17) to control access to left and right running wheels (14) and (14), and (18) is a hydraulic cylinder for the engine (1) and the transmission case (2). Front and rear links on the lower side (19) (20)
The front float (21) is suspended between the left and right running wheels (14) and (14) below the planting case (3) and the handle (7). . As shown in FIG. 1 and FIGS. 4 to 6, a rear view portal-type link provided with a planting depth adjusting lever (22) is connected.
Attach both ends of left and right shaft (23a) to (23)
Direction axis (23a) middle Intermediate lower surface axis (21a) middle
The upper surface was fixed and fixed to the rear float (21) upper surface
The front and rear shafts (21a) are mounted on a U-shaped support (21b) in side view.
At the end , the rear and front sides of the rear float (21) are supported by rolling sensor arms (24) and (24), which are rolling sensors for detecting the tilting of the rice transplanting machine in the left-right direction , in the front-rear direction shaft (21a). Let the front and back
The rear hood around the horizontal axis (21a) and the horizontal axis (23a).
The front side of the funnel (21) rolls and pitches
It is configured as follows. Further, a pitching sensor arm (25), which is a pitching sensor for detecting tilting of the rice transplanting machine in the front-rear direction, is brought into contact with the upper surface of the front float (18) to change the planting depth and the pitching operation of the machine. ) And the change in the space between the aircraft. [0006] Further, a receiving cylinder (28) is horizontally suspended above the transmission case (4) via a bracket (26) and a rolling fulcrum shaft (27), and a rolling shaft rotatably inserted into the receiving cylinder (28). (29) Input link (3
0) (30) The base end is fixed, and the link (30) (30)
While the upper end of the rolling sensor arm (24) (24) is connected to the tip, a rolling arm (31) is erected on a vertical line connecting the fulcrum shaft (27) in the middle of the receiving cylinder (28). 31) When one end is connected to a rolling rod (32) and the other end is connected to a spool (33a) of a rolling hydraulic switching valve (33), and the left and right sensor arms (24) and (24) move up and down in substantially the same direction. The left and right input links (30) and (30) are oscillated about the rolling shaft (29) to maintain the hydraulic switching valve (33) neutral,
When the left and right sensor arms (24) and (24) move in different directions or when only one of the sensor arms (24) moves up and down, the rolling fulcrum shaft (27) is moved by the swing amount difference between the left and right links (30) and (30). Swing the receiving cylinder (28) to the center to move the spool (33a) forward and backward, and switch the switching valve (33).
Is switched. Further, a receiving cylinder (35) is fixed to a body frame (34) on which the engine (1) is mounted, and the pitching sensor arm (2) is swingably mounted on the receiving cylinder (35).
The base end of 5) is inserted and supported, and the other end of the arm (25) is connected to a spool switching arm (39) of a pitching hydraulic switching valve (38) via a swing link (36) and a pitching link (37). The body and front float (1) that are connected to change the planting depth of the planting claw (12) due to unevenness of the tillage etc.
8) when the distance between the sensor arms changes (25)
Thus, this is detected and the switching valve (38) is switched. The hydraulic switching valves (33) and (38)
The hydraulic cylinder for rolling (40) and the hydraulic cylinder for pitching (16) are operated and controlled by a piston rod (16a) of the hydraulic cylinder for pitching (16) attached to the vehicle body frame (34). 41) through the swing plate (42)
And both ends of the plate (42) are connected to the swing case (15) via left and right rods (17) and (17).
(15) and a piston rod (16a)
The hydraulic cylinder for rolling (40) and the piston rod (40) are interposed between a fixed mounting plate (43) mounted on the side and the swing plate (42) via a swing fulcrum shaft (44).
a), the swing plate (42) is slid in the front-rear direction under the control of the hydraulic cylinder (16) for pitching, so that the height of the right and left wheels (14) and (14) with respect to the machine body is made different at the same time. While the application depth is maintained substantially constant, the swing plate (42) is horizontally swung about the fulcrum shaft (41) by the control of the rolling hydraulic cylinder (40) so that the right and left rods (17) and (17) are different. By pushing and pulling in the direction, the support height of the left and right wheels (14) and (14) is made different to maintain the rice transplanting machine substantially horizontally in the left and right directions. As is clear from the above, the left and right running wheels (1
4) A single float for paddy leveling (2
1) is provided rotatably around a longitudinal axis (21a), and a single rolling hydraulic switching valve (33) for detecting and switching the rotation of the float (21) around the longitudinal axis (21a) is provided. The switching valve (33) is stopped in response to the vertical movement of the float (21) substantially vertically, and the switching operation of the switching valve (33) is performed by the rolling operation of the float (21).
Rolling sensor arm (2)
4) Provide a single rolling hydraulic cylinder (40)
Is automatically operated to perform rolling control, and is fixed to the base of the planting depth adjusting lever (22).
Left-right axis (2)
3a), side view fixed to the upper surface of the rear float (21)
A front-rear direction shaft (21a) provided on a U-shaped cradle (21b ) is attached. The float (21) is moved up and down via the longitudinal axis (21a) by operating the lever (22) to adjust the planting depth. Further, the rolling direction is detected by a single float (21), a single hydraulic switching valve (33) is switched, and a single hydraulic cylinder (40) is operated to perform rolling control in both the left and right directions. As compared with the conventional structure in which the left and right hydraulic cylinders are operated via the switching valve, it is possible to prevent a difference in the rolling control timing depending on the right or left rolling direction, and the switching timing of the hydraulic switching valve (33) and the hydraulic cylinder (40) In addition to improving the workability of maintenance and repair work involving adjustment of the hydraulic oil pressure and the like, the hydraulic switching valve (33) is prevented from being switched by an operation other than the rolling operation of the float (21), and the hydraulic switching valve is controlled. (3
The frequency of the switching operation 3) is reduced compared to the conventional one, so that the oil seal structure of the hydraulic switching valve (33) can be simplified and the handling property such as maintenance work can be improved, and the planting depth adjusting lever (22) can be used to operate the plant. Since the longitudinal axis (21a) is raised and lowered when changing the depth, the planting depth can be adjusted without changing the left-right inclination of the float (21), thereby preventing the rolling control from malfunctioning due to the planting depth adjustment , and
U-shaped pedestal (21b) and rear view portal-shaped link (23)
By the longitudinal axis (21a) and the lateral axis (23a).
To form a universal joint mechanism.
1) and the connection between the planting depth adjusting lever (22)
By rolling or pitching the funnel (21)
The float (21) and the lever are prevented from being twisted.
-Simplified connection structure of (22) and improved rigidity
It is configured to be. The pitching sensor arm (2)
5) The lower pressure sensing part (25a) is in contact with the buoyancy center position (A) of the front float (18), and the vertical movement of the front float (18) is accurately detected by the sensor arm (25). The sensitivity is improved. The present embodiment is constructed as described above. During the rice transplanting operation, the depth of the planted rice field changes due to unevenness of the cultivator and the like. ) The whole thing goes up and down, comes in contact with the aircraft,
Sensor arm (25) interlocked with front float (18)
The operation of the pitching hydraulic cylinder (16) is controlled by the swing of
The planting depth is kept substantially constant, and the rolling hydraulic cylinder (40) is operated and controlled by swinging the rear float (21) left and right and up and down with respect to the aircraft when the aircraft is tilted left and right on a ridge or a slope. Left and right wheels (14)
(14) The rice transplanting machine is raised and lowered to a state in which the supporting heights are made different to keep the rice transplanting machine substantially horizontal, and the planting depth on the left and right sides is kept substantially constant. The front and rear floats (18) (2)
1), the adjusting lever (2)
2) Even if the planting depth is changed, the effect on the pitching is small and the pitching performance can be stably maintained. As can be seen from the above embodiment, the present invention comprises a single float for flattening a flat surface (21) provided between left and right running wheels (14), (14). A single rolling hydraulic switching valve (33) for rotatably rotating the float (21a) around the longitudinal axis (21a) and detecting and switching the rotation of the float (21a); A connecting member (24) for stopping the switching valve (33) and switching the switching valve (33) by a rolling operation of the float (21);
A single hydraulic cylinder for rolling (40) is automatically operated to perform rolling control, and
Rear view portal type fixed to the base of the planting depth adjustment lever (22)
On the left-right axis (23a) provided on the link (23)
U-shaped pedestal fixed to the top of the float (21)
(21b) is provided with a longitudinal axis (21a) provided, and detects the rolling direction by a single float (21) and switches a single hydraulic switching valve (33) to a single hydraulic cylinder (40). ) To perform rolling control in both the left and right directions, making it easier to make a difference in the timing of the rolling control depending on the left or right rolling direction compared to the conventional structure in which the left and right hydraulic cylinders are operated via the left and right hydraulic switching valves. It is possible to easily improve the maintenance and repair workability accompanied by adjustment of the switching timing of the hydraulic switching valve (33) and the hydraulic oil pressure of the hydraulic cylinder (40), and to improve the float (21). Switching of the hydraulic switching valve (33) by an operation other than the rolling operation can be easily prevented, and the switching operation frequency of the hydraulic switching valve (33) is controlled. Is lower than the hydraulic switching valve (3
3) The oil seal structure of 3) can be simplified, and the handleability can be easily improved, such as maintenance work. Also, when the planting depth is changed by operating the planting depth adjusting lever (22), the longitudinal axis (21a) is used. Is moved up and down, so float (2
1) left and right inclination can do Uefuka adjusted without changing the, can be easily prevented rolling control from malfunction by Uefuka adjusted, moreover a side view U-shaped cradle (21b)
And a rear view portal-shaped link (23) with a longitudinal axis (21a)
And universal joint machine connected by a horizontal shaft (23a)
Since the structure is formed, the float (21) and the depth of planting are adjusted.
The connecting part of the joint lever (22) is connected to the rear float (21).
Easy to squeeze by rolling or pitching
The float (21) and the lever (2).
2) Easy connection structure and easy improvement of rigidity
Rukoto is shall can.

BRIEF DESCRIPTION OF THE 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. [Description of Reference Numerals] (14) running wheel (21) float (21a) longitudinal axis (21b) cradle (22) Planting depth adjustment lever (23) link (23a) lateral axis (24) rolling the sensor arm (Connecting member) (33) Rolling hydraulic switching valve (40) Hydraulic cylinder for rolling

   ────────────────────────────────────────────────── ─── Continuation of front page        Panel     Referee Takashi Murayama     Referee Yutaka Kihara     Referee Hiromichi Hirase                (56) References Japanese Utility Model Showa 54-27022 (JP, U)                 Showa 55-75209 (JP, U)                 Shokai Sho 59-23404 (JP, U)                 Showa 55-90222 (JP, U)                 Shokai 55-155410 (JP, U)

Claims (1)

(57) [Claims] A single float for flattening the surface (21) provided between the left and right running wheels (14) (14) is rotatably provided around the longitudinal axis (21a), and the float (21) around the longitudinal axis (21a) is provided. A single rolling hydraulic switching valve (33) for detecting and switching the rotation is provided, and the switching valve (33) is stopped for substantially vertical lifting / lowering operation of the float (21), and rolling of the float (21) is performed. A connecting member (24) for switching the switching valve (33) by operation;
A single hydraulic cylinder for rolling (40) is automatically operated to perform rolling control, and
Rear view portal type fixed to the base of the planting depth adjustment lever (22)
On the left-right axis (23a) provided on the link (23)
U-shaped pedestal fixed to the top of the float (21)
A rice transplanter comprising a front-rear shaft (21a) provided at (21b) .