Ride-on rice transplanter

Abstract

To provide a ride-on rice transplanter making an operator of the machine aware when part of the machine is in contact with a levee while the traveling body thereof is brought close to the levee for transplanting.SOLUTION: In a ride-on rice transplanter in which an operator seated on an operator seat 20 provided on a traveling body 10 steers the machine so that a center mascot 25 standing upright at the front part of the machine body follows a guide line drawn in the field, the center mascot 25 is pivotally supported upright at the front part of the traveling body 10 so as to be rotatable forward and backward. A levee detecting member 28 is provided at the lower end thereof and is positioned slightly above the field surface. When the levee detecting member 28 comes into contact with the levee, the center mascot 25 tilts forward.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a riding type rice transplanter that an operator operates while sitting on a driver's seat.

Background Art

[0002] The riding type rice transplanter is described in Japanese Patent No. 4899397. In this riding type rice transplanter, an operator sitting on a driver's seat provided at the center of a traveling vehicle body travels in the field along a guiding line traced by a center mascot standing in front of the machine body in the field, so that neat seedling transplanting work can be performed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Since the riding type rice transplanter travels back and forth in the field to perform seedling transplanting work, in order to transplant evenly in the field, the traveling vehicle body is run to the edge of the ridge. However, if the vehicle runs carelessly, the vehicle body may ride up on the ridge or collide with it.

[0005] Therefore, an object of the present invention is to make the operator of the machine body aware that a part of the machine body is in contact with the ridge when the traveling vehicle body of the riding type rice transplanter approaches the edge of the ridge for transplanting.

Means for Solving the Problems

[0006] The problems of the present invention are solved by the following technical means.

[0007] The invention according to claim 1 is a riding rice transplanter in which an operator sitting in the driver's seat 20 provided on the traveling vehicle body 10 steers along a guiding line drawn in the field with the center mascot 25 standing upright at the front of the machine body. The center mascot 25 is pivotally supported at the front part of the traveling vehicle body 10 so as to be rotatable back and forth, and the ridge sensor 28 provided at its lower end is slightly lifted from the field surface. When the ridge sensor 28 contacts the ridge, the center mascot 25 falls forward. It is characterized by being a riding type rice transplanter.

[0008] The invention according to claim 2 is the riding rice transplanter according to claim 1, characterized in that a ridge sensor 30 for detecting that the ridge sensor 28 has contacted the ridge is provided, and an alarm is issued upon ridge detection.

[0009] The invention according to claim 3 is the riding rice transplanter according to claim 1, characterized in that the center mascot 25 is attached to the traveling vehicle body 10 by an upright biasing means, and when the ridge sensor 28 moves away from the ridge, the center mascot 25 returns to the upright position.

Effect of the Invention

[0010] In the invention according to claim 1, the operator sitting in the driver's seat 20 of the traveling vehicle body 10 steers so that the center mascot 25 moves forward along the guiding line drawn in the field. Therefore, when the ridge sensor 28 provided at the lower part of the traveling vehicle body 10 contacts the ridge and the center mascot 25 falls forward, the operator notices and can immediately stop the forward travel to prevent an accident where the traveling vehicle body 10 rides onto the ridge.

[0011] In the invention according to claim 2, even if the operator does not notice that the center mascot 25 has fallen forward, the alarm notifies the operator that the traveling vehicle body has contacted the ridge, so it is possible to surely prevent the traveling vehicle body from riding onto the ridge.

[0012] In the invention according to claim 3, even if the traveling vehicle body approaches the ridge too much and the center mascot 25 falls forward, when the traveling vehicle body 10 retreats, the center mascot 25 returns to the upright position by the upright biasing means 32, so the transplanting work can be continued immediately.

Brief Description of the Drawings

[0013]

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Mode for Carrying Out the Invention

[0014] Embodiments of the present invention will be described in detail below with reference to the drawings.

[0015] FIG. 1 shows a right side view of a riding type rice transplanter equipped with the seedling planting device of the present invention, and FIG. 2 shows a plan view thereof. As shown in FIGS. 1 and 2, in the riding type rice transplanter 1, the seedling planting part 3 is attached to the main frame 10 of the traveling vehicle body by a lifting link device 2. The riding type rice transplanter 1 is a four-wheel drive vehicle having a pair of left and right front wheels 6, 6 and a pair of left and right rear wheels 7, 7 as drive wheels. In this specification, the left and right sides are referred to as the left side and the right side respectively toward the forward direction of the riding type rice transplanter 1, the forward direction is referred to as the front side, and the reverse direction is referred to as the rear side.

[0016] As shown in Fig. 1, a main frame 10 below a step floor 19 is provided with a mission case 11 integrated with a hydraulic continuously variable transmission (HST) 5 and an engine 12 arranged in the front-rear direction. A steering post 14 projects upward from the front part of the mission case 11.

[0017] A steering handle 16 and a meter panel 17 are provided at the upper end of the steering post 14. A step floor 19 serving as a steering floor is attached to the floor position of the machine body, and a driver's seat 20 is installed above the engine 12.

[0018] The hydraulic continuously variable transmission (HST) 5 is shifted by a shift lever 110 provided on the right side of the handle 16. When the shift lever 110 is operated to the neutral position, the traveling drive is stopped. By operating the shift lever 110 forward, it is in the forward high-speed state, and by operating it rearward from the neutral position, it is in the reverse high-speed state. The forward and reverse speeds can be increased or decreased according to the inclination angle of the shift lever 110.

[0019] A center mascot 25 is erected at the front end of the left and right center of the main frame 10 and in the left and right center in front of the steering post 14. An aiming lamp 25a is attached to the upper end of this center mascot 25, and it is a rod curved in an S shape in side view. It is attached to the main frame 10 by a pivot 26 for standing and biasing. As shown in Fig. 4, a stopper 29 attached to the center mascot 25 hits a stopper 33 of the main frame 10 to regulate the forward fall of the center mascot 25.

[0020] A flange sensor 30 is attached to the stopper 29. When the center mascot 25 falls forward and hits the stopper 33, the aiming lamp 25a lights up or a warning sound is emitted to give an alarm.

[0021] A bracket 35 is provided at the bottom of the center mascot 25 to pivotally support an arm 27 that in turn supports a contact roller 28 acting as a ridge sensor, and the arm 27 is urged vertically by a tension spring 32. The contact roller 28 is slightly raised above the field surface, and when the arm 27 strikes the ridge in a vertical position, it tilts the center mascot 25 forward, and when the main frame 10 is moved backward, the arm 27 rotates backward, returning the center mascot 25 to its original upright position.

[0022] The alarm is cancelled by returning the center mascot 25 to its original upright position, but it can also be cancelled in conjunction with the movement of the seedling planting section 3 which rises as the traveling vehicle body 10 moves backward.

[0023] When approaching the ridge, the planting clutch is turned off and the forward speed is slowed down, thereby reducing the impact of the contact roller 28 hitting the ridge.

[0024] The front wheels 6, 6 are journaled on a front wheel support case 22 that is rotatably mounted on the side of the transmission case 11. The rear wheels 7, 7 are journaled on rear wheel support cases 24, 24. In addition, left and right line drawing markers 223 are provided at both left and right ends of the transmission case 162 of the seedling planting section 3 so that they can be erected and tipped over, and when traveling to transplant, they leave marks on the field surface, which serve as guide lines when transplanting adjacent rows.

[0025] The seedling planting section 3 can be raised and lowered by connecting it to the main frame 10 via a lifting link device 2 provided at the rear side, and by extending and retracting the lift cylinder 160, it can be raised to a non-working position or lowered to a ground work position. Power is transmitted to the seedling planting section 3 from the engine 12 via a PTO transmission shaft 167 (Fig. 1) and a PTO (planting) clutch (not shown) that switches the power transmission of this PTO transmission shaft 167 on and off.

[0026] The seedling planting section 3 includes a planting transmission case 162 that also serves as a frame rollably mounted via a rolling shaft at the rear part of the lifting link device 2, a seedling mounting table 163 supported by a support member provided on the planting transmission case 162 and reciprocating in the left - right direction of the machine body, a seedling planting device 164 mounted at the rear end of the planting transmission case 162 for separating seedlings one by one from the lower end of the seedling mounting table 163 and planting them in the field, and a center float 165, a side float 166, etc., which are soil - leveling bodies with their rear parts pivotally supported at the lower part of the planting transmission case 162 and their front parts pivotally mounted to be swingable up and down. The center float 165 and the side float 166 are provided for leveling the ground in front of the seedling planting point by the seedling planting device 164.

[0027] The seedling mounting table 163 is provided with left and right transfer belts 171, 171 that sequentially send the mat - type seedlings to the seedling separation position by the seedling planting device 164, symmetrically and in parallel for each planting row. These left and right transfer belts 171, 171 are endless rubber belts, and feeding protrusions are formed on their surface sides.

[0028] Fig. 7 shows the operation of an operator rising from the operator's seat 20 and supplying the mat - type seedlings 50 to the seedling mounting table 163 of the seedling planting section 3. The waist of the operator M and the operator's seat 20 are connected by a cable 51 with a coupler 51a. If the operator M may fall from the traveling vehicle body 10, the coupler 51a will disconnect and stop the traveling of the traveling vehicle body 10.

[0029] Fig. 8 is a perspective view of the engine 39. A fan 40 is provided on the engine body, and by controlling the air - cooled fan 40 through planetary gear drive, it is possible to control the fan rotation speed required for cooling. When it is at a low temperature, the fan is reversed to direct the warmed air around the engine to the radiator to raise the water temperature.

[0030] In addition, a CCV (crankcase ventilation valve) 41 is provided on the cylinder head and arranged at a position where the temperature is likely to rise, thereby suppressing the occurrence of freezing. The CCV 41 can be directly fixed to the cylinder head cover, reducing the component configuration. By arranging it directly above the head near the engine, it becomes a position where the temperature rises easily even at low temperatures, and even if a heat insulating material is required, it can be dealt with using a thin heat insulating material. The CCV 41 is arranged on the bracket that fixes the harness fixed to the DPF bracket. The outer periphery of the CCV 41 is covered with a casing, and a valve is provided so that exhaust gas enters the gap when the temperature of the air becomes a certain level or lower, and the exhaust gas enters the gap at low temperatures to increase the temperature.

[0031] Figure 9 shows a configuration in which a lambda sensor for measuring the O2 concentration is installed in an agricultural machine equipped with a common rail engine with a post-treatment device. During operation, the O2 concentration is constantly monitored, and when the current O2 concentration becomes lower (higher) than the reference O2 concentration in terms of rotation and load, control is performed to close (open) the EGR opening degree.

[0032] As a result, for the purpose of creating an optimal combustion state by EGR, since the lambda sensor measures the O2 concentration in the exhaust gas, the current combustion state can be constantly monitored. When considering the ideal combustion state = O2 concentration, a target O2 concentration is set for each rotation and load, and by performing feedback control to approach that value, an optimal combustion state can always be created, thus preventing an increase in exhaust soot and excessive accumulation of DPF soot due to excessive EGR flow rate, as well as deterioration of fuel consumption.

[0033] Figure 10 shows an agricultural machine equipped with a common rail engine with a post-treatment device, in which a lambda sensor for measuring the O2 concentration is installed. During operation, the O2 concentration is constantly monitored, and when the current O2 concentration becomes lower than the O2 determination reference concentration for each rotation, an abnormal warning is given to the operator and a display prompting inspection of the air cleaner is provided.

[0034] As the lambda sensor measures the O2 concentration in the exhaust gas, when the air volume is extremely insufficient, the O2 concentration drops abnormally. In such cases, it is highly likely that the air cleaner is clogged. By actively issuing an abnormal warning and prompting inspection, problems such as excessive DPF soot accumulation due to abnormal soot emissions can be avoided.

[0035] Figure 11 shows that in an agricultural machine equipped with a common rail engine with an after-treatment device, a lambda sensor for measuring the O2 concentration is installed, a limit O2 concentration value is set, and when the limit value is reached, control is performed to implement injection quantity limitation.

[0036] As the O2 concentration decreases, it can be said that black smoke is generated from the exhaust gas. Therefore, when the O2 concentration reaches a certain limit value, by applying fuel injection quantity limitation, the generation of black smoke can be suppressed. Also, if the soot emission amount is suppressed, the DPF regeneration interval becomes longer, fuel consumption is improved, and the risk of excessive DPF accumulation can also be reduced.

Explanation of Signs

[0037] 10 Traveling vehicle body 20 Operator's seat 25 Center mascot 28 Ridge sensor 30 Ridge sensor

Claims

1. In a riding rice transplanter in which a center mascot (25) standing upright at the front of the machine is steered along a guiding line drawn in the field while sitting in a driver's seat (20) provided on a traveling vehicle body (10), the center mascot (25) is pivotally supported at the front of the traveling vehicle body (10) so as to be rotatable back and forth, and a ridge sensor (28) provided at its lower end is slightly lifted from the field surface, and when the ridge sensor (28) contacts the ridge, the center mascot (25) falls forward. A riding type rice transplanter characterized by the above.

2. A riding type rice transplanter according to claim 1, further comprising a ridge sensor (30) for detecting that the ridge sensor (28) has contacted the ridge, and giving an alarm when the ridge is detected.

3. The riding type rice transplanter according to claim 1, wherein the center mascot (25) is attached to the traveling vehicle body (10) by an upright biasing means, and when the ridge sensor (28) moves away from the ridge, the center mascot (25) returns to an upright position.

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