JP2729371B2 - Front wheel cap for riding rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front wheel of a riding type rice transplanter, and more particularly, to a wheel attached to a spoke-type front wheel which is steered and steered in a muddy field of a paddy field with its running part immersed. It is about the cap.

[0002]

2. Description of the Related Art Rice transplanting is performed under field conditions in which most of the rice is cultivated and plowed, and there is little water on the rice field, and when a groove is formed on the rice field, mud comes into the groove.
The riding type rice transplanter uses so-called spoke-type wheels configured by connecting a boss portion and a rim portion with a plurality of spokes 25 as running wheels in order to reduce the weight of the fuselage and prevent an increase in steering resistance. ing.

[0003]

As described above, the spoke type wheels are generally used for both front wheels and rear wheels of a riding type rice transplanter in order to reduce the weight of the fuselage and prevent an increase in steering resistance. I have. However, in the front wheels for steering and steering of the traveling aircraft, for example, when the soil is used in a low-viscosity paddy such as sandy soil, it is not so much a problem, but when used in a high-viscosity paddy such as clayey. When the steering operation is performed to plant the seedlings straight, the spokes pass through the grooves made by the front wheels when traveling through the mud of the paddy field, so there is almost no lifting of the mud by the spokes. When turning the aircraft, the front wheels are largely steered and the mud is lifted by the spokes that rotate upward with the rotation of the front wheels, and the mud that enters between the spokes is cornered by the inside of the front wheel and the spoke part The mud adheres, and the mud adheres to the mud and falls on the headland during the turning of the aircraft. In particular, the front wheel of the riding type rice transplanter is generally configured with a small diameter in order to facilitate steering and steering, and it is difficult for mud that enters between spokes to escape from the front wheel at the time of turning the airframe, etc. It also causes adhesion. Due to the above-mentioned phenomenon, the surface of the headland on the headland becomes rougher than that of the normal planted field, and there is a disadvantage that the accuracy of planting seedlings on the headland decreases.

[0004] This problem is caused by cultivation and cultivation like a riding rice transplanter.
This is a fatal problem for the front wheels that become the steering wheels of the traveling aircraft used in paddy fields after scraping, and various measures have been taken by changing the spoke shape, reducing the diameter of the spokes, devising the tire shape, etc. However, it has not completely solved the problem. Therefore, the present invention has been made in view of the above problems, in order to minimize the roughness of the rice field during the headland turning of the front wheel used in a riding type rice transplanter, particularly in a wheel cap attached to the front wheel, An object of the present invention is to enhance the mounting function so that the mounting of the wheel cap is easy and firm.

[0005]

Accordingly, the present invention provides a front wheel 3
Planting work section 13 behind the traveling body 1 having the
And the front wheel 3 is a spoke-type wheel in which the boss portion 21 and the rim portion 23 are connected by a plurality of spokes 25, and the spokes 25 of the front wheel 3 are mounted on the riding rice transplanter in which the front wheel 3 is steered and steered by the driving handle 7a. Spoke 2 from outside
Wheel cap 2 that prevents mud from entering into the 5
In order to attach the wheel cap 9, the center part of the wheel cap 29 is fastened and fixed from the outside of the boss part 21, and the engaging tool 39 having a U-shaped groove provided on the back surface of the wheel cap 29 is
This is a front wheel cap of a riding type rice transplanter characterized by being engaged with spokes 25.

[0006]

According to the present invention, the front wheels 3 used in the riding type rice transplanter are kept lightweight by using spoke type wheels, and in particular, the front wheels which are largely steered and steered when the traveling body 1 turns on the headland. The wheel cap 29 is attached to the wheel cap 29 by fastening the center of the wheel cap 29 from outside the boss portion 21 and engaging the engaging tool 39 having a U-shaped groove provided on the back surface of the wheel cap 29 with the spoke 25.
, The U-shaped groove of the engaging member 39 provided on the wheel cap 29 is engaged with the spoke 25 at a position fixed to the center of the wheel cap 29 and at a position separated from the center of the fixed wheel. By stopping the rotation, the wheel cap 29 is fixed at at least two places, and is easily and firmly mounted. Is prevented from loosening.

Since the spokes 25 are covered by the wheel caps 29, the spokes 25
Mud is prevented from entering the space, and the mud is lifted by the spokes 25. Further, the mud coming into the space between the spokes 25 adheres to a corner portion surrounded by the inside of the front wheel 3 and the spoke 25, and the adhered mud is condensed. As a result, the front wheel 3, which is largely steered and steered when the traveling body 1 turns on the headland, is prevented from dropping to the headland on the headland while the body is turning. The mud rushes to the side in the soil, and the mud swelled and raised on the rice field is smoothened by the restoring force of naturally trying to return to the original state in the groove of the wheel mark after the front wheel 3 has passed. The roughness of the surface of the headland can be reduced as much as possible. Therefore, the accuracy of planting seedlings on the headland does not decrease.

[0008]

FIG. 2 is an overall side view of a riding type rice transplanter using one embodiment of the present invention. The traveling body 1 of the riding type rice transplanter is supported by the front wheels 3 and the rear wheels 5.
A driver's seat 7 is placed on the upper rear side of the vehicle, and an operation panel 9 is provided in front of the driver's seat 7. A driving handle 7 a is provided on the upper side of the operation panel 9. At the rear of the traveling machine body 1, a planting work section 13 is mounted via a link mechanism 11 so as to be able to move up and down. The planting work section 13 has a seedling mounting table 15 provided to be inclined forward, and a planter 17 for planting the seedlings held on the seedling mounting table 15. A float 19 for leveling the Tsukada surface is provided.

The front wheel 3 has a boss 21 fixed to an axle.
And a plurality of spokes 25 connecting the boss portion 21 and the rim portion 23, and a pneumatic tire 27 attached to the outer periphery of the rim portion 23. In the embodiment of the present invention, three spokes 25 are provided at equal intervals. The wheel cap 29 is attached to the outside of the front wheel 3.

The wheel cap 29 will be described below with reference to FIGS. The wheel cap 29 is a circular main body 3 fitted to the inner periphery of the rim portion 23.
0 and an engagement member 39 that engages with the wheel side.
The body 30 of the wheel cap 29 has a bulged portion 30a formed around the boss 21 and the surface of the body 30 is formed to be uneven as shown in the sectional view of FIG. 30 has a structure in which the strength of itself is reinforced by the presence of the bulging portion 30a.
At the center of the main body 30, a mounting hole 33 for passing a bolt 31 for fastening to the axle of the front wheel 3 is formed.
A bolt 31 and a nut 35 are provided as fasteners for fastening the wheel cap 29 to the front wheel 3. The bolt 31 is inserted through the mounting hole 33, and the wheel cap 29 is fastened and fixed by a nut 35 screwed to the bolt 31 in a state where the wheel cap 29 is in contact with the outer end of the boss portion 21 of the front wheel 3. The third spoke 25 is covered from the outside.

Further, on the back surface of the main body 30, a mounting recess 37 is formed at a position corresponding to the spoke 25, and a mounting surface 41 for mounting an engaging tool 39 extending to the front wheel 3 side is formed. The engaging member 39 fixed to the mounting surface 41 has a U-shaped cross section, and the U-shaped groove is
It is provided so as to face the center direction. The spoke 25 is housed in the U-shaped groove of the engagement tool 39 and is engaged in a detent state, so that the wheel cap 29 and the front wheel 3 rotate integrally.

When the traveling body 1 travels on a rice field, the front wheel 3 is steered by the driving handle 7a.
Is covered by the wheel cap 29, so that muddy soil can be prevented from entering the spokes 25 of the front wheel 3 during planting and running. Then, at the time of turning the body on the headland, the turning operation is performed by largely steering the front wheels 3 while moving the traveling body 1 forward. At this time, the mud of the paddy field is prevented from entering between the spokes by the wheel cap 29 provided on the front wheel 3, and the mud is pushed to the side without lifting the mud by the spokes. The mud that has been swollen and raised on the rice paddy surface is smoothened by the restoring force that naturally tries to return to the original state in the groove of the wheel mark after the front wheel 3 has passed, so that the headland turns Minimize the rough surface of the rice field. The installation of the wheel cap 29
The wheel cap 29 is fastened and fixed from the outside of the boss portion 21 of the front wheel 3 by tightening the bolts 31 and the nuts 35, and the engaging tools 39 provided on the back surface of the wheel cap 29 are simply engaged with the spokes 25. Therefore, the wheel cap 29 is fixed at the center portion of the wheel cap 29 and the wheel cap 29 is positioned at a position separated from the center portion at which the wheel cap 29 is fixed.
Is engaged with the spoke 25 to prevent rotation,
It will be fixed in at least two places, making its installation easy and robust. Furthermore, since it can be removed and can be easily attached and detached, it can be freely adopted depending on the soil quality of the rice field.

FIG. 4 is a front sectional view showing a second embodiment of the present invention. As shown in the figure, in the second embodiment, only the vicinity of the mounting hole 33 is bulged to the outside of the machine, and the bulged portion 30a is formed to protrude. Therefore, as compared with the first embodiment (the imaginary line in FIG. 4), the second embodiment has an advantage that only the hatched portion 43 in FIG. The wheel cap 29 described above can be attached to the rear wheel 5 if it is manufactured according to the shape of the rear wheel 5.

On the rear side of the front wheel 3, a scraper 48 for scraping off mud attached to the wheel is provided. The scraper 48 rotates around a fulcrum 46 provided on the final case 45 of the front wheel, and is urged downward by a spring 47 wound around the fulcrum 46. The scraper 48 is bent at the peripheral green portion of the front wheel 3 and the pneumatic tire 27
Is in contact with A leveling plate 49 is attached to the bent portion 48a so as to be swingable rearward and downward, and has an action of leveling the scraped mud.

The circumferential surface of the pneumatic tire 27 is shown in FIG.
As shown in (A), lugs 50 and 51 are formed. The lugs 50 are provided on the outer peripheral surface of the front wheels 3 attached to both sides of the fuselage 1, and are provided diagonally so that the outer side of the fuselage 1 first sinks on the rice field 53 in front view. The lug 51 is the front wheel 3
Are formed between the lugs 50 and in parallel with the lugs 50. The lug 52 shown in FIG.
The outer and inner lugs are formed as straight and integral ones, and similarly to the lugs 50 and 51, are formed diagonally so that the outer side of the machine body is lowered in a front view. These lugs 50,5
When the airframe 1 is running, the rugs 1 and 52 sink into the rice field 53 from the outer edge of the rug,
Spreads inside both front wheels, and ripples to the outside of the wheels are suppressed. Thus, troubles such as knocking down the seedlings already planted due to the ripples generated from the front wheels 3 are reduced.

[Brief description of the drawings]

FIG. 1 is an overall side view of a wheel cap.

FIG. 2 is an overall side view of a rice transplanter to which the wheel cap of the present invention is attached.

FIG. 3 is a front sectional view of a wheel cap.

FIG. 4 is a front sectional view of a wheel cap according to a second embodiment.

FIG. 5 is a front axle plan view showing a mounted state of a scraper.

6 (A) and 6 (B) are front partial enlarged views of front wheels showing lug shapes of tires.

[Explanation of symbols]

 3 Front Wheel 21 Boss 23 Rim 25 Spoke 29 Wheel Cap 30 Main Body 39 Engagement Tool

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shuji Tanaka 667-1 Iya-cho, Oaza, Higashiizumo-cho, Yatsuka-gun, Shimane Prefecture Examiner, Mitsubishi Agricultural Machinery Co., Ltd. Katsutoshi Shiozawa (56) , A) Japanese Utility Model Showa 52-115029 (JP, U) Japanese Utility Model Showa 57-194801 (JP, U) Japanese Utility Model Showa 57-90201 (JP, U)

Claims (1)

(57) [Claims] 1. A riding type rice transplanter in which a planting work section 13 is mounted behind a traveling body 1 having a front wheel 3 and a rear wheel 5, and a front steering wheel 3 is steered by a driving handle 7a.
Is a spoke type wheel in which the boss portion 21 and the rim portion 23 are connected by a plurality of spokes 25, and the spoke 2 of the front wheel 3
5 In order to mount the wheel cap 29 for preventing the mud from entering between the spokes 25 from the outside, the center of the wheel cap 29 is fastened and fixed from the outside of the boss portion 21 and the U provided on the back surface of the wheel cap 29 is fixed. The groove
A front wheel cap for a riding type rice transplanter, wherein the engaging tool 39 is engaged with the spoke 25.