JPS6345164B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention particularly relates to a pitting prevention device for a riding rice transplanter.

[Conventional technology]

Conventionally, in a riding type rice transplanter in which a planting work machine is attached to the rear of the rice transplanter body via an attachment link so as to be able to be raised and lowered, both ends of the rear link are connected via shafts between the upper link and the lower link of the attachment link. were rotatably connected to each other, and the planting machine was connected to a shaft that was integrated with this rear link.

[Problems to be Solved by the Invention] However, in such a conventional structure, the wheels of the rice transplanter main body follow the undulations of the plowing plate on which the rice transplanter is traveling, and the working machine is kept horizontal by the link and is placed on the rice field. However, since there is no play in the rear link in the longitudinal direction of the upper link, there is a limit to the movement of the link, which makes it difficult to control the work equipment in the correct state when the wheels run on extremely uneven surfaces. This resulted in disadvantages such as the front side of the float of the work equipment being lifted off the field surface, or the back side being lifted up from the field surface, which not only reduced the leveling effect but also hindered the planting of seedlings. .

[Means to solve the problem]

In view of the above-mentioned drawbacks, the present invention provides play between the upper link and the rear link so that the planting machine can always be controlled in the correct state, improving the soil leveling effect and making it possible to always plant seedlings well. The purpose is to provide a riding rice transplanter. In order to achieve this object, the present invention includes a pitching part that enables pitching when the planting machine is lowered, between the upper link and the rear link of the attachment link that connects the rice transplanter main body and the planting machine. The present invention is characterized by being provided with a pitching prevention device that automatically prevents movement of the pitching section when the planting machine is raised.

【Example】

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a rice transplanter main body, and this main body 1 is equipped with an engine 2, a handle 3, a seat 4, wheels 5 and 6, a power transmission mechanism 7, and the like. 8 is a planting work machine, and this work machine 8 is equipped with a planting body 9, a seedling stand 10, floats 11, 12, and the like. This working machine 8 is attached to the rear of the main body 1 via a pantograph-shaped attachment link 13 provided on the main body 1, and power is transmitted from the main body 1 by a belt transmission mechanism (not shown). . A rolling shaft 17 is integrally provided on a rear link 16 connected between an upper link 14 and a lower link 15 of the mounting link 13, and a working machine is connected to this rolling shaft 17 via a bearing 18 as shown in FIG. 8 are rotatably connected to each other, and a rolling lock spring 19 is provided between the upper link 14 of the attachment link 13 and the work implement 8. The mounting link 13 rotatably supports the front end of the upper link 14 on the main body 1 via a shaft 20, and the entire mounting link 13 is rotatable in the vertical direction about the shaft 20 as a fulcrum. Further, a piston rod 22 of a hydraulic cylinder 21 provided in the main body 1 is connected to the front end of the lower link 15, and as the rod 22 expands and contracts, the lower link 15 is forcibly moved up and down, and the entire mounting link 13 is rotated. It is becoming more and more popular. The rear link 16 has its lower end rotatably connected to the rear end of the lower link 15 via a shaft 23, and has a horizontally long elongated hole 24 formed in its upper end. A shaft 25 provided at the rear end of the upper link 14 is rotatably inserted into the hole 24, and the upper link 1 is inserted into the rear link 16.
4 has some play in the longitudinal direction. In addition, in order to prevent rattling due to this play, a pitching spring 26 is stretched between the side wall of the upper link 14 and the rear link 16 to provide initial tension, and the pitching is performed by this spring 26 and the long hole 24. A section 27 is configured. Further, spring hooks 28 and 29 are provided on the upper end of the rear link 16 and the upper surface of the upper link 14, respectively, and one end of a pitching lock spring 30 is fixed to the hook 29 of the upper link 14. The other end of the lock spring 30 has a ring or hook shape and is detachably hooked onto the hook 28 of the rear link 16. This lock spring 30 is normally free with respect to the rear link 16, but when the working machine 8 is lifted by the action of the hydraulic cylinder 21, in other words, when it is lifted, it engages with the hook 28 of the rear link 16 and the tension is applied. The lock spring 30 and the hook 28 of the rear link 16 constitute a pitching prevention device 31. . Next, the operation of the rice transplanter having the above configuration will be explained. During the planting work, the wheels 5 of the main body 1 travel while moving up and down according to the unevenness of the tiller, and the mounting link 13 follows the movement of the wheels 5 and performs a swinging movement about the shaft 20, The working machine 8 connected to the rear is held in a substantially horizontal state, and the floats 11 and 12 are slid horizontally in contact with the field surface. Moreover, even if the main body 1 is tilted in the left-right direction, the rolling shaft 17 only rotates, and the working machine 8 is maintained in a substantially horizontal state. moreover,
When the wheel 5 runs on an extremely uneven surface, the main body 1 tilts extremely, but even if it exceeds the absorption range by the mounting link 13, the pitching part 27 can absorb the tilt, so that the front or rear side of the work implement 8 can be lifted up. Planting is done in the correct conditions without any problems. Furthermore, when turning around on a headland or traveling on the road, the hydraulic cylinder 21 is extended to forcibly raise the mounting link 13 to lift and transport the work implement 8.
The pitching portion 27 does not shake due to the initial tension of the pitching spring 26, and as shown in FIG.
8, the rear link 16 is fixed, the pitching part 27 is locked, and the rolling lock spring 19 also locks the rolling lock spring 19 to prevent the work implement 8 from rolling, and the work implement 8 is completely fixed in the lifted state. Ru.

【Effect of the invention】

As explained above, according to the present invention, a planting machine is connected to a mounting link via a rolling shaft, and a pitting portion and an automatically operated pitching prevention device are provided between an upper link and a rear link of the mounting link. Since this device is installed, even if the wheels of the rice transplanter body that travels in the rice fields move up and down due to the uneven surface of the tiller, the attached link and rolling shaft will always allow the machine to move forward and backward as well as left and right. It is maintained in a horizontal state, and even if the main body is extremely tilted, the pitching part can absorb the tilt, so the work machine is always kept in the correct state, improving the leveling effect of the float, and making it easier to plant seedlings. It will be held on. In addition, when the work equipment is lifted, the pitching prevention device automatically operates to prevent the pitching part from moving, allowing the work equipment to be completely fixed in the lifted state and running stably. There is.

[Brief explanation of the drawing]

The drawings show an embodiment of the riding-type rice transplanter of the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a plan sectional view of the main part, and Fig. 3 is the main part showing the state when lifted. FIG. 1...Rice transplanter body, 4...Seat, 8...Planting work machine, 13...Mounting link, 14...Upper link, 16...Rear link, 17...Rolling shaft, 27...Pitching part , 31... pitching prevention device.

Claims (1)

[Claims] 1. In a riding type rice transplanter in which a planting work machine is attached to the rear of the rice transplanter main body via a mounting link so as to be able to be raised and lowered, the planting machine is attached to the rear of the rice transplanter main body through a rolling shaft integrated with a rear link that is connected to an upper link of the mounting link. The planting work machine is connected, and a pitching part is provided between the upper link and the rear link to enable pitching when the planting work machine is lowered. A riding rice transplanter characterized by being equipped with a pitching prevention device that automatically prevents movement.