JPH0236342Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a structure for supporting a float in a rice transplanter so that the depth of seedling planting can be adjusted. A support frame for a lever for rotating the spindle, which is rotatably attached to the side support piece, and a stopper that abuts on the support piece to prevent movement of the spindle in the axial direction are positioned close to each other. It relates to something that is fixed to a support shaft.

Conventionally, in such a float support structure, the lever support frame and the stopper are each individually attached to the support shaft by welding, but this has the disadvantage that the welding work is time-consuming and troublesome work. Not only that, but due to deformation and residual stress of the spindle caused by welding the lever support frame and stopper in close proximity to each other, the spindle becomes difficult to rotate smoothly, and the lever support frame There was also a risk of cracking in the welded part of the stopper, and there was room for improvement.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to improve work efficiency through simple modification, and to avoid deformation of the spindle and cracking of the welded part. be.

A characteristic feature of the float support structure for a rice transplanter according to the present invention is that the support frame and the stopper are integrally formed, and either one of the support frame or the stopper is welded to the support shaft.

Next, the effects of the feature configuration of the present invention will be described.

That is, by welding only one of the integrally formed lever support frame and stopper, it is possible to reduce the number of welding steps and to reduce the deformation and residual stress of the support shaft.

Therefore, even though the lever support frame and the stopper are attached by welding, the work efficiency is improved, and the support shaft can be rotated smoothly.
In addition, it is possible to finish the welded portion in a good condition with no cracks, and as a result, a float support structure for a rice transplanter with great practical advantages has been obtained.

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, a pair of left and right propulsion wheels 1, 1 and a mud surface grounding float 2 which also serves as a grounding support are provided, and a driving unit 3 is installed on the front side of the fuselage. , and a seedling planting device equipped with a planting claw 4 and a seedling stand 5 is provided on the rear side of the machine, respectively.
Furthermore, a pair of control handle rods 6, 6 are provided at the rear of the seedling planting device to constitute a walking type rice transplanter.

A second
7 and 8, a handle support frame equipped with a pair of left and right bent pipes 7A, 7A and a plate-shaped body 7B for connecting bolts is used as a planting driving mechanism that also serves as a machine frame. The upper end portions 7a of the bent pipes 7A, 7A,
7a is press-deformed into a plate shape, and the plate-shaped upper end 7
a, 7a, the horizontal shaft-shaped base 6 of the handle rod 6, 6;
Engagement notches S and S for a and 6a are formed. Then, handle rod fixing bolts 9, 9 are fixed through the plate-like upper end portions 7a, 7a and the plate-like bodies 8, 8 welded to the horizontal shaft-like base portions 6a, 6a.
At the same time, the bolt insertion holes 10, 10 formed in the plate-like bodies 8, 8 are formed in an arc shape centered on the axis of the horizontal axis-shaped bases 6a, 6a, and the The height can be changed or adjusted, or the handle bars 6, 6 can be adjusted to a storage position where the handlebars 6, 6 are folded down significantly when transporting the aircraft in an upright position with the front part at the bottom on a truck etc. It is set as.

However, in the figure, 11 is a cover body that covers the handle rod attachment part, and 12 and 13 are a planting clutch lever and a lever for operating the wheel up and down, respectively. It is fitted externally.

In addition, when adjusting the handle bars 6, 6 to the storage position, as shown in FIG.
4 may be formed separately from the bolt insertion hole 10 for height adjustment.

In configuring the planting drive transmission case, on both sides of the central input case part 15a,
Branch case parts 15b, 15b are input case part 1
A cylindrical frame 15 that also serves as a transmission case for 5a
c and 15c.

Next, the float support structure will be explained based on FIGS. 2 to 6.

Each of the support arms 16 that pivotally supports the rear end of each of the floats 2 in a vertically swingable manner is welded and fixed to a pipe-shaped float support shaft 17, and the float support shaft 17 is attached to each of the pair of bent pipes 7A, 7A. The first attached to
A pipe 1 bolted to the support pieces 18, 18 and the pair of branch case parts 15b, 15b, respectively.
A lever support frame 22 is rotatably attached to the second support pieces 20 and 20 attached to the shafts 9 and 19, and a lever support frame 22 pivotably supports the shaft rotation operation lever 21 so as to freely swing only horizontally, and the shaft 17 One of the pair of stoppers 23, 23 is attached to the lever support frame 2.
A locking frame 24 is attached to the bending pipe 7A, and the locking frame 24 is attached to the support shaft 17 in a state close to the lever 21, and further locks the lever 21 at a plurality of positions in the swinging direction. By dynamic operation, float 2
... so that you can change the mounting position on the aircraft.
Moreover, it is constructed so that it can be fixed.

To constitute the lever support frame 22 and the stopper 23 located close to it, the connecting plate-shaped portion 22a of the lever support frame 22 and the stopper 23 are integrally formed. Then, the connection plate portion 22a
is welded to the support shaft 17, and the lever support frame 22 and stopper 23 are fixedly attached to the support shaft 17. Furthermore, when welding the plate-shaped portion 22a to the opposite shaft 17, the front and rear surfaces of the support shaft 17, which are in phase different by 180 degrees, are respectively welded parts, thereby suppressing deformation of the support shaft 17 due to welding. It's like this.

Also, a support arm 16 and another stopper 2
3 are also fixed to the support shaft 17 by welding, and in the welding, the 180°
A pair of welded portions are provided at locations with different degrees of phase to suppress welding deformation of the support shaft 17.

The first and second support pieces 18, 20 are configured with a pair of upper and lower support shaft engagement notches 25, 25, so that the mounting position of the float 2 can be changed over a wide range. There is.
Also, a presser 2 for preventing the spindle from coming off is attached to the first support piece 18.
7 fixing bolts 28 are formed therein.
In other words, the first support single-side notch 25 faces backward, the second support single-side notch 26 faces forward, and no retainer is provided for the second support single-side notch 26.

[Brief explanation of the drawing]

The drawings show an embodiment of the float support structure for a rice transplanter according to the present invention, with FIG. 1 being a side view of the walking rice transplanter, FIG. 2 being a plan view of the float support structure, and FIG. The line arrow views and FIGS. 4 to 6 respectively indicate −, −, and in FIG. 3.
7 is a partially cutaway plan view of the handle rod attachment structure, FIG. 8 is a side view of the same structure, and FIG. 9 is a side view showing a modification of the handle rod attachment structure. 2...Float, 16...Support arm, 17...
... Float support shaft, 18 ... Support piece, 21 ... Lever for rotating the support shaft, 22 ... Lever support rod, 23
...stopper.

Claims (1)

[Scope of utility model registration request] A float support shaft 17 equipped with a support arm 16 for the float 2 is rotatably attached to the body side support piece 18, and the support frame 22 of the support shaft rotation operation lever 21 and the support shaft 17 in the axial direction of the support shaft 17 are a stopper 2 that abuts the support piece 18 to prevent movement;
This is a float support structure for a rice transplanter in which each of No. 3 is placed in close proximity to the support shaft 17, and the support frame 22 and the stopper 23 are integrally formed.
A float support structure for a rice transplanter in which either one of the support frame 22 and the stopper 23 is welded to the support shaft 17.