JP2006006244A - Riding type rice paddy weeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems such that in a rice paddy weeder using a rice transplanter as a traveling machine body and linking the weeder at its rear direction, it brings up soil on turning at a headland and tramples down the roots of rice and also since it can not travel by recognizing a working position with an eyesight, it damages the rice roots by floating or embedding them caused by crossing rice root rows with wheels of the transplanter, or passing a rotor for weeding between the rows, over the rows of the rice roots because the weeder is not positioned at a suitable arrangement. <P>SOLUTION: This riding type rice paddy weeder having three wheels of left and right front wheels and central rear wheel is provided by installing an engine 100, a driving part for transmitting the power of the engine to the front wheels and driving, a steering part for turning the machine body by changing the direction of the rear wheel on a riding type traveling machine body 1 arranged with a driving seat between the front and rear wheels. The position of the rear wheel is set by leaving from the front wheels with a distance of making its traveling trajectory become the same as that of the front wheel at the outside of turning when the traveling machine body makes the minimum turn, and further, a weeding part is installed in front of the front wheels. The weeding part is connected with the engine through a left and right directional transmitting shaft transversely spanned at the front part of the machine body and also is made as capable of moving up and down by centering around the transmitting shaft. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a riding-type paddy field weeder for entering a paddy field after planting and weeding without damaging the planted rice stock.

  In recent years, consumers' consciousness about food has changed, and the demand for agricultural products with reduced pesticide use with reduced amounts of pesticides used, or with pesticide-free or organic cultivation has increased. In such a cultivation method, chemical control of weeds using an agrochemical such as a herbicide is not performed at all. Instead of pesticides, mechanical weed control such as walking type weeders and biological weed control such as Aigamo are performed.

  However, walking-type weeders require too much effort and labor to weed a large area, which is inefficient and hinders the expansion of scale. In the weed control by Aigamo, the cost of purchasing and taking care of Aigamo is expensive. There were problems, such as being costly, economic loss due to the escape of natural enemies and Aigamo, and the timing of putting Aigamo into paddy fields was difficult.

Under these circumstances, an efficient paddy weeder is required as a means of mechanical weed control. A paddy weeder using a rice transplanter as a traveling machine has been researched and patented. (Reference 1).
By the way, the rice transplanter has a structure that connects and pulls the rice planting work part to the rear of the aircraft so that the wheels do not travel after planting seedlings, but the conventional weeder is behind the rice transplanter Instead of the rice planting work part, weeding part is connected, and the weeding part is pulled and weeded.

  This type of weeder uses a rotating rotor for weeding the streak, and uses a rake that reciprocates to the left and right for weeding between the streaks, thereby weeding the streak and the strain at the same time. In addition, traditionally, there are only rice transplanters to enter the paddy field filled with water, and rice transplanters are also widely used for rice planting by farmers. This is advantageous in terms of cost and handleability.

  However, many traditional rice transplanters are four-wheeled vehicles, and when changing direction on a headland or the like, the rear wheel crosses multiple strips, and the rice is lifted by the formation of rucksets and the rice plants are crushed. There was a problem that many rice stocks were damaged when the stocks were lifted or buried.

  In addition, rice stocks planted in paddy fields by rice transplanters are arranged with a certain left-right spacing (streaks) and front-rear spacing (between strains), but the streak is not straight, although there is a degree depending on the skill of the worker, It is planted in a meandering state.

Therefore, as described above, when the weeder is connected to the rear of the rice transplanter, it is not possible to run while looking at the working position of the weeder. As the rice planter crosses the rice strips with the wheels of the rice transplanter, or the rotating rotor for weeding the streak advances over the strips without being located between the strips, the rice plant emerges. There was a problem that it was damaged by being laid or buried.
JP 2000-300006 A

  The problem to be solved by the present invention is that, in the weeding part of a paddy field where a rice transplanter is used as this machine and a weeder is connected to the rear of the rice transplanter, the rice transplanter has four wheels. When changing the direction of the soil, the lifting of the soil with four wheels and the crushing of the rice stock caused many rice stocks to float or be buried, and the working part was at the rear, so the working position was visually confirmed. The rice plant crosses the rice strips with the wheels of the rice transplanter without being able to run, or the weeding machine is not positioned properly and the rotary rotor for strip weeding passes over the rice plant strips, etc. It has been damaged by floating or burying.

  In order to solve the above-mentioned problem, as described in claim 1, the front wheel is a three-wheeled type with two left and right front wheels and one central wheel, and a driver's seat is arranged between the front and rear wheels. The traveling machine body is provided with an engine, a drive unit that transmits the power of the engine to the front wheels and driven, and a steering unit that changes the direction of the rear wheels and turns the course of the machine body. Installed away from the front wheels by a distance that makes the traveling locus the same as the front wheels on the outside of the turn at the time of the minimum turn of the aircraft, and provided a weeding part in front of the front wheels, It is connected to the engine via a transmission shaft in the direction and can be moved up and down around this transmission shaft.

  As described in claim 2, the position of the rear wheel can be changed back and forth.

  As described in claim 3, the rear wheel support rod of the steering section having two or more vertically long connecting cylinders arranged side by side on the center frame along the longitudinal direction of the traveling machine body and having a rear wheel attached to the lower end. It was inserted into and supported by any one of the connecting cylinders.

  As described in claim 1, the vehicle body is supported by three wheels including two front wheels on the left and right and a rear wheel on the center, and a driver's seat is disposed between the front wheels and the rear wheels, Since weeding sections were provided, the load distributed to the front of the aircraft was distributed to the front wheels of the two wheels and traveled through the paddy field, while traveling while visually confirming the working position, the planted rice strips meandered. However, the weeding part can be placed at an appropriate work position and work can be performed reliably, and the position of the rear wheel is the distance at which the travel locus is the same as the front wheel outside the turn at the time of the minimum turn of the traveling machine body However, it is installed away from the front wheel, and the rear wheel travels along one locus of the front wheel when turning, so that it is possible to suppress the lifting of soil and the crushing of rice plants due to the passage of the wheel.

  As described in claim 2, the rear wheel position can be changed back and forth, so that the front and rear positions of the rear wheel are changed in accordance with the number of work strips of the weeding section, and the turning center at the time of the minimum turning of the aircraft is changed. According to the width of the weeding part, it is easy to turn on the headland, and the rear wheel and the front wheel on the outside of the turn can run on the same trajectory, so that lifting of soil by the wheels and crushing of rice plants can be suppressed. .

  As described in claim 3, a plurality of vertically long connecting cylinders are arranged side by side, and a supporting rod for a rear wheel is inserted into the connecting cylinder so as to be able to turn freely. The front and rear positions of the rear wheels can be changed.

  FIG. 1 is an overall side view of a riding paddy weeder according to the present invention. This weeder is equipped with an engine 100 at the rear of the machine body 1, a seat 11 is provided at the center, and a handle 12 is provided in front of the seat 11. In addition, two left and right driving wheels 13 driven by the engine 100 are arranged at the front of the machine body, and one steered wheel 14 steered by the handle 12 is arranged at the rear of the machine body to provide a three-wheel traveling machine body. Configure. The weeding unit 2 is connected to a gear box 16 provided at the front of the machine body 1.

The weeding unit 2 includes a drive shaft 20 connected to the gear box 16, a frame 21 projecting left and right from the drive shaft 20, a weeding rotor 22 driven to rotate forward between the strips, and a rear side of the weeding rotor 22. The rotating roller 23 is configured to move, and the rake 24 is reciprocated left and right.
The drive shaft 20 is provided with a reciprocating device 240 that reciprocates the rake 24 left and right. The frame 21 has a cover 25 that prevents mud splashing, and rice that prevents rice leaves from getting caught in the weeding rotor 22. A stock guard 26 is attached.

  A rotary support shaft 220 is connected to the tip of the drive shaft 20, and the support shaft 220 is supported by the frame 21. A plurality of weeding rotors 22 are attached to the rotation support shaft 220 at equal intervals, and idle rollers 23 are attached to the frames 21 and arranged behind the respective weeding rotors 22. Weed it and weeded the streak. Further, the power from the drive shaft 20 is transmitted to the reciprocating device 240, and the rake 24 is attached to the reciprocating shaft 241 provided in the reciprocating device 240, and is disposed between the interstitial weeding rotors 22 in a front view to reciprocate left and right. And weed the strains.

FIG. 2 is a front view of the body 1 of the riding paddy weeder.
Power from the engine 100 is shifted in the transmission case 101 in the center of the body 1 and transmitted to the left and right drive cases 131 via the horizontal drive shaft 15 at the bottom of the body 1. Drive wheels 13 are arranged adjacent to the outside of each drive case 131 and connected by an axle 130 for driving. The motive power is converted from the height of the horizontal drive shaft 15 at the lower part of the fuselage 1 to the height of the axle 130 of the drive wheel 13 to keep the minimum ground clearance of the fuselage 1 at a high position.

  Further, the power separated from the transmission system to the drive wheels 13 is transmitted to the transmission shaft 162 in the left-right direction that is horizontally mounted on the front portion of the transmission case 102 provided on the side surface of the machine body 1. The transmission shaft 162 is connected to a gear box 16, and the gear box 16 includes a connecting portion 160 that transmits power to an axis orthogonal to the transmission shaft 162 and a fixing bolt hole 161. As shown in FIG. 1, the drive shaft 20 of the weeding portion 2 is fitted and fixed to the connecting portion 160, and the power from the transmission shaft 162 is transmitted to the drive shaft 20 to drive the weeding portion 2.

  An elevating arm 31 is attached to the gear box 16, and an elevating mechanism 3 is formed by connecting a hydraulic cylinder 30 to the elevating arm 31. The hydraulic cylinder 30 is fixed to the body frame 10, and the lifting mechanism 3 is driven by the hydraulic cylinder 30. The elevating mechanism 3 rotates the gear box 16 up and down around the transmission shaft 162, and ascends and descends the weeding unit 2 connected to the gear box 16.

FIG. 3 is a plan view of the riding paddy weeder.
The weeding part 2 is configured to process 8 rice stocks. The drive wheel 13 is arranged so as to straddle the four rice stocks, and the steered wheel 14 travels between the central strips. The steered wheel 14 is connected to the handle 12 by a steering mechanism (not shown). This steering mechanism decelerates a sprocket attached to the shaft of the handle 12 with a gear, and transmits the rotation of the reduced handle 12 to a sprocket provided on the steering wheel 14 via a chain. The steering wheel 14 rotates in a direction opposite to the steering direction of the handle 12 by a predetermined angle corresponding to the steering angle, and the body 1 turns in the steering direction of the handle 12.

  Further, at the maximum steering angle position of the handle 12, the distance from the turning center where the extension line of the axle 130 of the drive wheel 13 and the extension line of the axle of the steered wheel 14 intersect to the steered wheel 14 and the drive outside the turn. The distance to the wheel 13 is configured to be equal.

  By arranging the wheels in this way, the steering wheel 14 and the driving wheel 13 on the outside of the turn travel on the same trajectory at the time of the minimum turn of the airframe 1, and the number of ruts formed by the wheels is reduced. It is possible to suppress the damage of the rice stock caused by lifting or crushing the rice stock by the wheels.

  Further, since the number of working strips in the weeding section 2 can be changed to 6, 8, or 10, the front and rear positions of the steering wheel 14 are adjusted, and the turning center is set to the weeding section 2 at the time of the minimum turning of the body 1. It is positioned on a line segment in the front-rear direction passing through the vicinity of the edge on the inner side of the turn of the head, thereby making it easier to turn on the headland.

  FIG. 4 is a side view of the rear part of the riding paddy weeder. The state which removed the engine case 103 is shown. The steered wheel 14 rotatably attached to the bracket 140 is inserted into the connecting cylinder 143 provided at the rear portion of the airframe 1 through the support rod 142 of the bracket 140 and is applied to a stopper (not shown) so as to be pivotably supported. The cap 141 is attached to the support rod 142, and the support rod 142 is pivoted about the shaft.

  The connecting cylinder 143 is provided at three positions on the rear part of the machine body 1, and the number of working strips of the weeding unit 2 from the front side of the machine body 1 is the position of the 6 article specification, the position of the 8 article specification, and the position of the 10 article specification. ing. FIG. 4 shows a state in which the steered wheel 14 is attached to the position of the 8-way specification. Further, when the mounting position of the steered wheels 14 is changed, the wheel base changes, so that the steering mechanism chain (not shown) that connects the steering wheel 12 and the steered wheels 14 corresponds to each mounting position. Replace with a longer one.

1 is an overall side view of a riding paddy weeder according to the present invention. The front view of the body part of a riding paddy weeder. Plane action diagram of a riding paddy weeder. The side view of the rear part of a riding paddy weeder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airframe 10 Airframe frame 100 Engine 101 Transmission case 102 Transmission case 103 Engine case 11 Seat 110 Support rod 12 Handle 13 Drive wheel 130 Axle 131 Drive case 14 Steering wheel 140 Bracket 141 Cap 142 Support rod 143 Connecting cylinder 15 Horizontal drive shaft 16 Gear box 160 Connection portion 161 Bolt hole 162 Transmission shaft 2 Weeding portion 20 Drive shaft 21 Frame 22 Weeding rotor 220 Rotating support shaft 23 Free-rolling roller 24 Rake 240 Reciprocating device 241 Reciprocating shaft 25 Cover 26 Rice padding 3 Lifting mechanism 30 Hydraulic pressure Cylinder 31 Lifting arm A Rice plant

Claims (3)

The front wheel is a three-wheel system with two left and right wheels and one rear wheel in the center, and the engine and the power of the engine are transmitted to the front wheels to a passenger traveling vehicle with a driver seat located between the front and rear wheels. A drive unit for driving and a steering unit for changing the direction of the rear wheel to turn the course of the aircraft,
The position of the rear wheel is set away from the front wheel by the distance that the travel locus is the same as the front wheel outside the turn at the time of the minimum turn of the traveling aircraft,
In addition, a weeding section is provided in front of the front wheels, and the weeding section is connected to the engine via a transmission shaft in the left-right direction that is horizontally mounted on the front of the machine body, and the paddy paddy weeding machine that can be moved up and down around the transmission shaft. .   The riding paddy weeder according to claim 1, wherein the position of the rear wheel can be changed back and forth. Two or more vertically long connecting cylinders are installed side by side on the center frame along the length direction of the traveling machine body, and the rear wheel support rod of the steering section with the rear wheel attached to the lower end is attached to any of the connecting cylinders. The riding paddy weeder according to claim 2, wherein the paddy paddy weeder is inserted and supported so as to be pivotable.