JPH0218983Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a float support structure for a rice transplanter, in which a float support pipe is installed in a planting case in a front-back orientation, and the float is supported at two locations, front and rear, at the front and rear ends of the pipe. .

In the float support structure of the rice transplanter mentioned above, conventionally, when connecting the float to the float support pipe,
As shown in FIG. 5, a float 7 support pin or fulcrum boss 21 is welded and fixed to the cut end surface of the support pipe 12 in such a manner that it is also used as a closing member to prevent mud from entering the pipe 12. However, the cut end surface of the pipe 12 must be machined to follow the outer circumferential shape of the pin or boss 21, and the abutment shape of the pin or boss 21 and the machined end surface of the pipe 12 must be machined. Because of the complexity of the welding process, welding work was extremely difficult and work efficiency was reduced.

In view of the above-mentioned circumstances, the purpose of this invention is to
Another advantage of this invention is that it is a simple improvement that allows the float support pipe to be closed without using a separate member, while also making it easier to connect the float support pin or the support boss to the support pipe.

The characteristic configuration of the present invention is that, in the float support structure of the rice transplanter described above, a vertically flat pressing deformation part is formed at the end of the float support pipe, and the entire length of the tip edge of this pressing deformation part is used as a float fulcrum. pin,
Alternatively, the fulcrum bosses are welded and fixed horizontally on the left and right sides, and their functions and effects are as follows.

In other words, when welding the float fulcrum pin or fulcrum boss, it is only necessary to press and deform the end of the pipe. Machining can be greatly facilitated, and by forming the pin or boss to be flat on the top and bottom and welding and fixing the pin or boss horizontally on the left and right over the entire length of the tip edge of the pressing deformation part, the pin or boss can be easily processed. It goes without saying that the boss can also be used as a closing member, preventing mud from entering the pipe without using a separate member, and the shape of the abutment between the pin or boss and the end of the pipe can be made substantially straight. As a result, the welding work can be greatly facilitated, and overall, the efficiency of assembling the float support structure can be greatly improved with just an extremely simple modification of pressing and deforming the pipe. .

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

As shown in FIG. 1, a front motive power unit is equipped with a pair of left and right propulsion wheels 1 that can be freely operated to raise and lower the aircraft, and a center float 2 that serves as a ground rocking sensor for automatically controlling the wheels 1 to raise and lower the vehicle. The part 3 is connected to the front end of the body frame 4, which also serves as a transmission case, and a sloped seedling stand 5 that moves back and forth horizontally with a constant stroke is placed in order from the pine-shaped seedlings W placed on the seedling stand 5. Four planting claws 6 that take out seedlings one by one and plant them on the mud surface, a pair of left and right soil leveling floats 7 that support the aircraft on the ground in cooperation with the wheels 1, a pair of left and right control handles 8, etc. A seedling planting device 10 configured by attaching various devices to a planting transmission case 9 is connected to the rear end of the body frame 4, thereby forming a walking rice transplanter.

As shown in FIGS. 1 and 2, the structure in which the soil leveling float 7 is connected to the planting transmission case 9 includes seedlings connected integrally downward from the left and right ends of the planting transmission case 9, respectively. Claw support case 11
, a pair of left and right front and rear float support pipes 12
are fixedly connected by connecting fittings 13 while in contact with the inner side surfaces of the support case 11, respectively, and bent guard parts 14 located on both outer sides of the seedling planting device 10 are integrally formed on the left and right ends. The horizontal rotating shaft 15 is connected and supported by both support pipes 12 across their rear ends, and the left and right center portions of the rotating shaft 15 extend rearward from the center portion of the planting transmission case 9. A rotary shaft 15 is connected and supported to the intermediate portion of the provided handle 8 in a state that allows rotation of the rotary shaft 15.

Then, the longitudinal swinging link 16 connected to the front part of the earth leveling float 7 and the horizontal connecting pin 17 attached to the front end of the support pipe 12 are engaged and connected to the elongated hole 16a, and are attached to the rear part of the earth leveling float 7. The bracket 18 is pivotally connected to an arm 19 fixed to the horizontal rotating shaft 15, and is connected to the elongated hole 16a.
The vertical movement of the float 7 around the lateral axis X of the rear side pivot allows the float 7 to fit smoothly along the mud surface as the aircraft travels, and is also attached to the rotating shaft 15. By rotating and fixing the rotary shaft 15 using the swing lever 20, the attitude of the arm 19 is changed and the float 7 is
The height of the transmission case 9 for planting is changed to adjust the planting depth of the planted seedlings.

To explain in more detail the connection structure between the front end of the support pipe 12 and the front-rear swing link 16 on the float 7 side, as shown in FIG. At the same time, the bosses 21 for the pins 17 are welded and fixed horizontally to the left and right over the entire length of the tip edge of the pressing deformation portion 12a, thereby forming a swinging link 16 having a U-shape in cross section. The horizontal connecting pin 17 is inserted into the boss 21 from the front side in a plan view, and is inserted through the long hole 16a on both sides of the link 16 and the boss 21 so as to be prevented from coming off.

In other words, the pressing deformation portion 12 is formed to be flat on the top and bottom.
By welding the boss 21 to the tip edge of the pipe a, the welding can be performed in a substantially straight line, making the welding work easier, and the boss 21 prevents mud from entering the pipe 12. It is designed to reliably prevent this.

Note that the swing link 16 on the float 7 side is connected to the pipe 12.
In order to connect the front end, instead of welding and fixing the float fulcrum boss 21 to the tip edge of the pressing deformation part 12a, as shown in FIG.
The fulcrum pin 22 to be engaged and connected to a may be fixed by welding.

The present invention is intended for various types of walk-behind rice transplanters, such as four-row rice transplanters and other multi-row rice transplanters.

[Brief explanation of the drawing]

The drawings illustrate an embodiment and a conventional example of the float support structure of a rice transplanter according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a perspective view showing the float support structure, and Fig. 3 is a support pipe and a float. FIG. 4 is an enlarged partially sectional plan view showing another embodiment, and FIG. 5 is an enlarged perspective view showing a conventional example. 7... Float, 9... Planting case, 12...
Float support pipe, 12a...Press deformation part, 2
1... Fulcrum boss, 22... Fulcrum pin.

Claims (1)

[Scope of utility model registration request] A float support structure for a rice transplanter is constructed such that a float support pipe 12 is fixed to a planting case 9 in a front-back orientation, and the front and rear ends of the pipe 12 support a float 7 at two locations in the front and rear, the float support pipe A vertically flat pressing deformation part 12a is formed at the end of the pressing deformation part 12a, and a float fulcrum pin 22 or a fulcrum boss 21 is welded and fixed horizontally to the left and right over the entire length of the tip edge of this pressing deformation part 12a. A float support structure for a rice transplanter characterized by the following.