JP2002034306A - Horizontal and vertical movement control device of paddy weeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a conventional weeder which needs many ground floats as control sensors and whose whole layout and compact machine configuration are thereby difficult in relation to weeding teeth laterally disposed in a row-like form. SOLUTION: Swingable frames 2 on which weeding teeth 3 are arranged are connected to a main frame 2 extended from a support machine frame 15 attached to a travel work vehicle to both the lateral sides to form the paddy weeder 5. The lateral center site of the paddy weeder 5 is rotatably connected to the support frame 15 by the use of a longitudinally directed support shaft 6. Ground floats 7, 7' are disposed on both the lateral sides of the main frame 2 to enable the horizontal control of the main frame in the lateral direction. The horizontal and vertical movement control device of the paddy weeder can control the vertical movement of the main frame on the bases of the ground pressure of either of the ground floats 7, 7' or the average ground pressure of both the ground floats 7, 7'.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal / elevation control device for a paddy field weeding machine, and belongs to the technical field of agricultural machinery.

[0002]

2. Description of the Related Art Among conventional paddy weeding apparatuses, a weeding machine similar to that of the present invention has a structure in which weeds are stored in water while moving in a paddy field at the time when seedlings after rice transplantation have taken root. ing. In this case, the weeding machine is provided with a plurality of weeding teeth swinging in the left-right direction with respect to the traveling direction in a substantially vertical posture and arranging a plurality of them in the left-right width direction. It acts on the part to make the weeds rise to the surface of the water. And even if this weeding tooth is in contact with the foliage of the seedling, it can avoid breaking or pulling out of the seedling by the elasticity of the tooth and the seedling, so that weeds immediately before and after the seedling can be removed. It has become.

[0003]

In the above-mentioned conventional weeding machine, the grounding sled or the grounding floor is mounted on the frame of the weeding machine in order to keep the grounding height (depth) of the weeding tooth constant. −
The vehicle was run with the vehicle fixed. This kind of paddy field weeding machine has a wide width (about 5 m in the embodiment) and swing frames provided at intervals in the front and back, so that it is arranged at the front and rear positions and at the left and right sides. It has been extremely difficult to always stably maintain the contact height (depth) of the weeding tooth at a constant and appropriate height.

[0004] Therefore, in the conventional weeding machine, the height (depth) of the whole weeding tooth so as to stir the roots and foliage of the weeds from the lateral side properly is maintained. In addition, horizontal control and elevation control are provided, and separate grounding floats (horizontal sensor and elevation sensor) are provided for each of them to obtain detection information.

[0005] Therefore, the conventional weeding machine requires a large number of ground floats as detection sensors, so that the overall layout and body structure are related to the weeding teeth arranged in rows in the horizontal direction. There was an issue that was difficult and difficult to put together in a compact form.

[0006]

SUMMARY OF THE INVENTION The present invention takes the following technical means in order to solve the above-mentioned problems. That is, a paddy field weeding machine 5 is constructed by connecting a swinging frame 4 provided with an array of weeding tows 3 to a main frame 2 extending to both left and right sides from a traveling work vehicle 1, and the paddy field weeding machine 5. The machine 5 is provided so that the left and right center portions are rotatably connected to a supporting machine frame 15 attached to the traveling work vehicle 1 by a support shaft 6 in the front-rear direction, and the main frame 2 is grounded on both left and right sides. Floats 7 and 7 'are provided to enable horizontal control in the left-right direction, and the ground pressure of one of the ground floats 7 and 7' or the pressure of both ground floats 7 and 7 'is provided. This is a horizontal / elevation control device for a paddy field weeding machine configured to be able to elevate and lower based on the average contact pressure.

[0007]

Since the present invention is constructed as described above, the weeding tooths arranged in the front and rear directions and in the horizontal direction are adjusted horizontally and horizontally based on the contact pressure of the contact float. Although weeding work can be performed accurately while controlling the elevation (height), the number of grounding floats that also serve as detection sensors has been reduced to solve the conventional problems and to be compact. Has features.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described with reference to the drawings. First, as shown in FIG. 5, the traveling work vehicle 1 is provided with a front wheel 11 operated by a handle 10 of a cockpit 9 at a front portion of a vehicle body frame 8, and a rear wheel 12 serving as a driving wheel at a rear portion. Is provided. The engine 13 is housed in an engine room covered by a bonnet cover 14 on the front side of the handlebar 10, and is configured to transmit the rotating parts.

Next, the paddy field weeding machine 5 is shown in FIGS.
As shown in FIG. 2, a main frame for attachment protrudes outward in the left and right lateral direction with respect to the traveling direction of the traveling work vehicle 1 and extends outward from a supporting machine frame 15 connected to the rear center position of the traveling work vehicle 1. And the supporting mechanism 2. In this case, as shown in a simplified rear view of FIG. 1, the main frame 2 is pivotally attached to a support shaft 6 provided at the rear part of the traveling work vehicle 1 along the front-rear direction so as to freely turn left and right. , And is elastically suspended by left and right balance springs 17 and 17 ′ having a base fixed to the transmission case 16.

As shown in FIGS. 3 and 5, the oscillating frame 4 includes a left oscillating frame 4a and a right oscillating frame on the front side and the rear side of the main frame 2, respectively. 4b are arranged, and a plurality of portions are supported on the main frame 2 by a swing support rod 18 so as to be swingable in the left-right direction. In this case, as described above, each swing support rod 18 has a base pivotally connected to the main frame 2 and a distal end pivotally connected to the swing frame 4 for connection and support.

As shown in FIG. 3, the oscillating device 20 includes a drive shaft 1 extending rearward from a lower portion of the transmission case 16.
9, four eccentric wheels 21 are mounted on the main frame 2.
Are arranged on the front side and two on the rear side and are mounted on the shaft. As shown in FIG. 3, the four swinging lots 22 have a base connected to the eccentric wheel 21 and a leading end connected to the swinging support rod 18 at a close position, so that the left-right reciprocating swinging can be transmitted. It has a configuration. As shown in FIG. 3, the four eccentric wheels 21 are provided with their eccentric positions shifted from each other in the rotation direction with respect to the drive shaft 19. It is configured to swing in the opposite direction.

As described above, the four swing lots 22 are connected to the front left and right swing frames 4a and 4b and the rear left and right swing frames 4a and 4b, respectively. As described above, the left and right swing frames 4a and 4b swing in opposite directions to cancel out the vibration and reduce the occurrence of the vibration.

Next, as shown in FIG. 6, the weeding tooth 3 is formed by bending a distal end portion of a rod-shaped member made of spring steel and bending the scraping portion 3a (by bending it rearward in the traveling direction). The base is attached to the swinging frame 4 by the attachment 23. As described above, a plurality of the weeding tooths 3 are arranged in the swinging frame 4 (the left swinging frame 4a and the right swinging frame 4b) so as to swing back and forth in the horizontal direction. As shown in FIG. 6, a function of sweeping the root (or foliage) of the weed from the side and pulling it out to float on the water surface is exhibited.

As shown in FIG. 7, the stirring member 24 is made of rubber and has a plate shape having a vertical width and is tapered so as to be in contact with the soil surface at the tip of the weeding tooth 3. It is fixedly provided at a height level between the water surface. The agitating member 24 swings right and left integrally with the weeding tooth 3 to vibrate peculiar to elasticity, removes the weeds caught, pulls out the roots from the soil, and floats the roots. In this case, since the stirring member 24 is a rubber material having elasticity and has flexibility, the stirring member 24 hardly defeats or damages the rice seedlings.

Next, as shown in FIGS. 1 and 3, the grounding floats 7, 7 'are equally spaced to the left and right from the pivot point of the main frame 2 (the pivotal connection by the support shaft 6). And the paddy field weeding machine 5 is supported by ground pressure from a field scene. Then, as shown in FIG. 1, the grounding floats 7, 7 'are adapted to slide on the ground while sliding on the ground while adapting to the soil surface of the field. At this time, the left and right balance springs 17, 1, 1 are pivoted about the pivot point (support shaft 6).
It is configured so as to rotate on the basis of the topsoil while resisting 7 ′ and to perform horizontal control of the paddy field weeding machine 5. In addition, 25, 2
Reference numeral 5 'denotes a rolling restricting tool which is located at the upper limit of the left and right rolling positions and restricts the rotation of the main frame 2.

As shown in FIG. 4, the grounding floats 7, 7 'are slid left and right by the front and rear mounting plates 26 and the upper support rollers 27 with the main frame 2 interposed therebetween. A float support 28 is configured and supported. As shown in FIG. 4, the float support 28 is configured so that it can be moved left and right on the main frame 2 by an adjustment handle 29 and an adjustment screw shaft 30 to adjust the position. With this configuration, the grounding floats 7, 7 'can be adjusted to a position where the planting line of the rice plant in the field is avoided at the time of work, so that damage and pushing down of the rice seedling can be prevented beforehand. There is.

Next, one of the grounding floats 7 is shown in FIG.
As shown in (1), the front side is pivotally attached to a mounting rod 31 and the rear part is supported by a link mechanism 32, and the ground pressure is converted into a vertical movement and transmitted to a potentiometer 33. In this case, in the structure of the embodiment shown in FIG. 2, both ends of the link mechanism 32 are connected to the interlocking link 32a connected to the rear part of the grounding float 7, and the potentiometer 33 and the interlocking link 32a. And an operating link 32b. The operation link 32b
Has a structure in which an intermediate portion is pivotally mounted and the vertical movement of the grounding float 7 is transmitted to the potentiometer 33.

The harness 34 has one side connected to the potentiometer 33 and the other side connected to a lifting / lowering switching valve of a hydraulic lifting / lowering device mounted on the traveling work vehicle 1.
The valve is switched. In the case of the embodiment, the lift switching valve is not specifically shown, but is moved up and down by a detection value of the potentiometer 33 based on the ground pressure of the ground float 7 based on a preset standard position. It is configured to be controlled.

The operation of the paddy field weeding machine constructed as described above will be described. First, in a paddy field after rice planting, when the seedlings are in a viable state, the weeds gradually grow and require weeding work. Therefore, the paddy field weeding machine lowers to the working state at the rear of the traveling work vehicle 1, starts the engine 13, and prepares for the weeding work while driving the rotating parts of the machine body.

When the operation is started in this way, the traveling work vehicle 1 moves forward, while the rotational power from the engine 13 is transmitted from the transmission case 16 to the drive shaft 19 via the transmission device and the PTO shaft. The swinging device 20 (the eccentric wheel 2
Swinging lot 2 converted to reciprocating swinging motion by 1)
2. It is transmitted to the swing frame 4 via the swing support rod 18 (see FIG. 3). In the paddy field weeding machine 5, the weeding tooth 3 is swung by the swinging frame 4 integrally and starts reciprocating lateral movement to act on the surface of the soil.

In this manner, the weeding tooth 3 continues to swing back and forth in the left-right direction while moving forward in the direction of the arrow as shown in FIG. Advancing while agitating the side of the planted seedling. At this time, the scraping section 3a acts to stir the roots and foliage of the weeds from the lateral side, so that the weeds can float on the scraping water surface.

As shown in FIG. 7, in the embodiment in which the stirring member 24 is attached, the weeding tooth 3 is a scraping portion 3a.
By itself, weeds whose roots are not sufficiently separated from the ground can be forcibly pulled out and raised. During the operation as described above, the paddy field weeding machine 5 includes the grounding floats 7 attached to the left and right sides of the main frame 1,
7 'slides while supporting it on the basis of the topsoil, receives the ground pressure, and is also subjected to a correction action by the upper balance springs 17 and 17', so that horizontal control in the horizontal direction is performed using the support shaft 6 as a fulcrum. ing. Therefore, even if the weeding tooth 3 is located on both the left and right sides away from the center of the main frame 1, the weeding can be done with no difference in the working depth with reference to the topsoil (see FIG. 1). .

In the paddy field weeding machine 5, as shown in FIG. 2, a detection signal is sent from a potentiometer 33 which detects the vertical movement of the grounding float 7 via a link mechanism 32 to a lifting / lowering switching valve. The lift control is performed by the transmitted and automatic operation. In this case, the lifting device of the airframe raises the paddy weeder 5 when the grounding float 7 is pushed higher than the reference position based on the grounding pressure received from the soil surface, and lowers it in the opposite case. In short, the lifting control is to perform the vertical lifting control so that the grounding float 7 is always kept at the reference position height, and to secure the proper working depth of the weeding tooth 3.

As described above, in the embodiment of the present invention, the work is continued while performing the horizontal control and the elevating control, but the sensor function is used as the configuration in which the grounding floats 7 and 7 'are used in common. The number of 7, 7 has been reduced. Therefore,
In the embodiment of the present invention, the layout can be easily made even in relation to the arranged weeding teeth, and the body structure can be made compact as compared with the conventional structure.

Another Embodiment 1 Next, another embodiment 1 will be described with reference to FIGS. Another embodiment 1 relates to the paddy weeding machine according to the present invention described above, in which the swinging frame 4 (herbicidal tooth 3) is connected in multiples.

First, the paddy field weeding machine 5 has the same configuration as that of the present invention described above, and the traveling work vehicle 1 is moved to the supporting machine frame 15 connected to the rear center position of the traveling work vehicle 1 (see FIG. 10). The main frame 2 (see FIG. 8) for mounting, which protrudes in the horizontal direction to the left and right and extends outward, is supported. The swing frame 4 is provided with a left swing frame on the front side and the rear side of the main frame 2 respectively.
A frame 4a and a right swing frame 4b are arranged and provided, and a plurality of portions are swingably supported on the main frame 2 by a swing support rod 18 in the left-right direction.

The oscillating device 20 includes a transmission case 16
Drive shaft 19 extending rearward from the lower part of
1 is mounted on the shaft, but two are disposed on the front side of the main frame 2 and two on the rear side. And 4
The swinging lot 22 has a configuration in which a base portion is connected to the eccentric wheel 21 and a leading end portion is connected to the swinging support rod 18 at a nearby position so that reciprocating left and right swinging can be transmitted.

As shown in FIG. 8, the additional oscillating frame 40 is constructed by integrally connecting the rear oscillating frames 4a and 4b with connecting rods 41 provided at the rear. ing. Next, the base of the weeding tooth 3 is attached to the oscillating frame 4 and the additional oscillating frame 40, respectively, in the same manner as in the configuration of the present invention described above. Thus, a plurality of the weeding tooths 3 are arranged in the swinging frame 4 and the additional swinging frame 40, and when reciprocating swinging in the lateral direction,
The function of making the root (or foliage) of the weed rise and float on the water surface by wiping it from the side and pulling it out.

As described above, in the paddy field weeding machine 5, since the additional swinging frame 40 is attached to the above-described configuration of the present invention and the series is increased, the field scene can be weeded over a wide area at a time and the occurrence of unevenness is small. There are advantages. Next, paddy field weeding machine 5
Is the case of the 2P hitch method shown in FIGS. 10 and 11,
When the traveling work vehicle 1 inclines in the front-rear direction, a difference in depth occurs between the front and rear weeding teeth 3 by integrally inclining. Therefore,
As shown in FIGS. 10 and 11, the paddy field weeding machine 5 includes a tilt adjusting device 4 including an adjusting handle 42 and an adjusting screw 43.
4 so that the inclination angle with respect to the traveling work vehicle 1 can be adjusted using the left and right mounting shafts 45 and 45 'as fulcrums.

With the above construction, the paddy field weeding machine 5 adjusts the depth of the weeding tooth 3 arranged in front and rear by using the inclination adjusting device 44 as necessary, and maintains the proper depth. Weeding work can now be performed.

[Brief description of the drawings]

FIG. 1 is an embodiment of the present invention and is a schematic rear view of a main part.

FIG. 2 is a side view of the grounding float according to the embodiment of the present invention.

FIG. 3 is a plan view of the embodiment of the present invention.

FIG. 4 is a perspective view of the embodiment of the present invention.

FIG. 5 is a side view of the embodiment of the present invention.

FIG. 6 is a side view of the embodiment of the present invention.

FIG. 7 is a perspective view of the embodiment of the present invention.

FIG. 8 is a plan view of another embodiment 1 of the present invention.

FIG. 9 is a side view of another embodiment 1 of the present invention.

FIG. 10 is a side view of another embodiment 1 of the present invention.

FIG. 11 is another embodiment 1 of the present invention and is a plan view.

[Explanation of symbols]

 Reference Signs List 1 traveling work vehicle 2 main frame 3 weeding tooth 4 swing frame 5 paddy weeder 6 support shaft 7 ground float 7 'ground float 15 support machine frame

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2B034 AA07 BA02 BA07 BB01 BC06 BE05 BG02 BG05 HA12 HB02 HB22 HB42 2B121 AA19 BB22 FA04 FA05 FA11 FA14

Claims (1)

[Claims] 1. A paddy weeding machine 5 is constructed by connecting a swinging frame 4 provided with an array of weeding tows 3 to a main frame 2 extending on both left and right sides from a traveling work vehicle 1, The paddy field weeding machine 5 is provided such that its left and right central portions are rotatably connected to a supporting machine frame 15 attached to the traveling work vehicle 1 by a supporting shaft 6 in the front-rear direction. Grounding floats 7 and 7 'are provided on both sides to enable horizontal control in the left and right direction, and the grounding pressure of one of the grounding floats 7 and 7' or both grounding floats 7 and 7 ' A horizontal / elevation control device for a paddy field weeding machine configured to enable elevation control based on the 7 'average contact pressure.