JP2777696B2 - 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 in a state where its running part is immersed in mud of a paddy field. It relates to the structure of 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 has a so-called spoke type wheel configured by connecting a boss portion and a rim portion with a plurality of spokes, in order to reduce the weight of the fuselage and prevent an increase in steering resistance. Used.

[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 terms of reducing the weight of the fuselage and preventing an increase in steering resistance. ing. However, in the front wheels that perform steering and steering of the traveling aircraft, for example, when used in a low-viscosity paddy field such as sandy soil, there is not much problem,
When used in a clayey or other viscous paddy field, 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. There is almost no lifting of mud by the aircraft, but when turning the aircraft on the headland, the aircraft tries to go straight by the rear wheels
On the other hand, the front wheels are steered in the turning direction,
It causes excessive lateral pressure due, which is attached to the connecting portion between the scan <br/> spoke and said spoke and rim portion enters the front wheels, headland in aircraft turning the adhering mud becomes a clod with the rotation of the front wheel Fall on the rice field. 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 problem, in order to minimize the roughness of the rice field when turning the headland of the front wheel used in the riding type rice transplanter, particularly in a wheel cap attached to the front wheel, Increase the strength of the wheel cap and remove mud from the wheel cap
It is an object that you prevent the adhesion.

[0005]

Accordingly, the present invention provides a front wheel 3
Planting work section 13 behind the traveling body 1 having the
Is mounted, and the front wheel 3 is steered by the driving handle 7a.
A rim 23 having a tire 27 and a plurality of spokes 25
Connected by spokes 25 and the outside of the front wheel 3
Wheel key to completely cover the gap between spokes 25
To provide a cap 29, the wheel caps 29, its
A circular bulge 30a is formed at the center of the bulge.
An annular convex portion 30c bulges out on the peripheral surface portion following 30a.
It is continuously formed in a stepped state with respect to the portion 30a, and
The portion 30a is at the end of the axle boss portion 21 and the outer peripheral portion is a rim.
It is characterized in that it is detachably fixed in a state in which it comes into contact with the portion 23 .

[0006]

The front wheel 3 has a boss portion 21 and a rim portion 23.
Is connected by a plurality of spokes 25, so that its lightness is maintained. Also,
To prevent the mud from entering the front wheel 3,
The wheel cap 29 to be attached has a circular shape at the center
Bulge portion 30a and a circumferential convex portion formed on the peripheral surface portion following the bulge portion 30a
30c is formed continuously with the bulging portion 30a in a stepped state.
These bulges 30a and protrusions 30c
Wheel cap 29 has its strength
In the groove that the front wheel 3 makes when driving
The main part 30c mainly rotates while always sliding on the mud.
To prevent mud from adhering to the wheel cap 29
In addition, light planting work can be performed.

[0007]

FIG. 2 is an overall side view of a riding rice transplanter using an embodiment of the present invention. The traveling body 1 of the riding type rice transplanter is supported by front wheels 3 and rear wheels 5, and a driver's seat 7 is placed on the rear upper portion of the traveling body 1 and an operation panel 9 is provided in front of the driver's seat 7. Is provided with a driving handle 7a. 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 includes a seedling mounting table 15 that is provided to be inclined forward.
And a planter 17 for planting the seedlings held on the seedling mounting table 15, and a float 19 for leveling the planted rice field is provided below the lower side of the seedling mounting table 15.

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 main body 30 of the wheel cap 29 has a sectional view of FIG.
As shown in the figure, the bulging portion 30a has a protruding shape at the center thereof.
Formed on the peripheral surface following the bulging portion 30a.
At a position close to the concave portion 30b, the convex portion 30c and the rim portion 23.
The recesses 30d are each formed in a stepped state.
The wheel cap 29 has a stepped peripheral surface.
Because it is made, the body 30 of the wheel cap 29
Its Re is the strength of itself become a reinforced structure. At the center of the bulging portion 30a 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. As a fixture for fixing the wheel cap 29 to the front wheel 3, a bolt 31 and a nut 35 implanted at the tip of the boss 21 are provided. The bolt 31 is inserted through the mounting hole 33, and a nut 35 and a sport
Wheel cap by means of an engagement member 39 which engages
Reference numeral 29 denotes a center portion at the outer end of the boss portion 21 of the front wheel 3,
In addition, the outer peripheral portion is detachable while in contact with the rim portion 23
And is fixed by the wheel cap 29 .
It is fully tegmental the gap between the spokes 25 and the spoke 25 of the front wheel 3 from <br/> outer Ri.

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 toward the front wheel 3 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 the wheel cap 29 and the front wheel 3 rotate integrally.

When the traveling body 1 travels on a rice field, the front wheels 3 are steered by the driving handle 7a.
The outside of the wheel cap 29 is entirely covered by the wheel cap 29, so that the mud soil can be prevented from entering the spokes 25 of the front wheel 3 during planting and running. When the aircraft turns on the headland, the traveling aircraft 1 tries to go straight by the rear wheels 5.
On the other hand, since the front wheels 3 are steered in the turning direction, the front wheels 3
The soil is pressed to the side. 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 not lifted by the spokes 25, but is pushed by the wheel cap 29 . The mud that has been swollen and raised on the surface of the field flows into the groove of the wheel mark after the front wheel 3 has passed by the restoring force of naturally trying to return to the original state, and the surface becomes smooth, so that Minimize rough rice fields when turning on headlands. In addition, at this time wheel cap 29, the central portion thereof
Peripheral portion following the circular bulging portion 30a provided at
Is provided with an annular convex portion 30c.
Because it is formed continuously in the attached state, it is almost convex during traveling
The portion 30c has these convexes in the groove through which the tire 27 passes.
Since the portion 30c rotates while always sliding on the mud,
Make sure that mud adheres to the surface of the
Is prevented. Especially in clay fields,
Mud is deposited in layers on the surface of the cap 29, and the front wheels 3
As well as dropping on the rice paddy
Damaged attached seedlings, and dropped by steering the front wheels when turning the aircraft
The headland may be lowered to roughen the headland.
The aircraft can run smoothly at all times without swelling.
You. Further, as shown in the embodiment, the bulging portion 30a and the convex portion 30c
When an annular concave portion 30b is formed between
The 30b may be colored differently from other peripheral portions,
Sticking stickers like
29 can also be designed, in which case the recess
30b is less likely to be in direct contact with mud, so
The tool does not come off. Also, wheel cap 2
9 is easily tightened by bolts 31 and nuts 35
It can be attached and detached, depending on the type of soil in the field
Both the possible adoption freely, hubcaps 29 et bolt fastening, the engaging member 39 itself as a spring of the elastic body, a clip shape embracing the spokes 25, engaging member 3
If a role as a fixing tool is added to 9, the fixing tool can be omitted. Furthermore, for example, the shape of the bulging portion 30a is
If the part 21 is configured to have a size that can be fitted exactly, the core
Easy alignment and easier mounting of wheel cap 29
You can also.

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.

FIG. 6 shows the peripheral surface of the pneumatic tire 27.
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.

[0015]

As described above, according to the present invention, the light weight of the front wheel 3 used for the riding type rice transplanter is maintained by using the spoke type wheel, and the front wheel 3 is filled with mud.
The structure of the wheel cap 29 provided to prevent
A circular bulge 30a is formed in the center of the bulge,
An annular convex portion 30 is formed on a peripheral surface portion following the bulging portion 30a.
c was continuously formed with the bulging portion 30a in a stepped state.
The wheel cap 2
9 can significantly reinforce the strength of the aircraft itself
Sometimes a large lateral pressure due to mud on the wheel cap 29
It can withstand even if it is applied, and its deformation, breakage, etc.
And a substantially annular convex portion 30 during traveling.
c, in the groove through which the tire 27 passes, these convex portions 3
Because 0c always rotates while sliding on the mud,
Mud on the surface of the wheel cap 29 even in a quality field
Is prevented from attaching to the wheel cap 29.
The mud that arrives falls on the rice field while traveling, damaging the planted seedlings
Planting work can be performed smoothly from start to finish.
You can do it.

[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 29 Wheel Cap 30 Main Body 30a Swell 30b Concave 30c Convex 30d Concave

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shuji Tanaka 667, Iya-cho, Ojimo-cho, Higashi-Izumo-cho, Yatsuka-gun, Shimane Prefecture Referee, Mitsubishi Agricultural Machinery Co., Ltd. References: JP-A-60-199306 (JP, A) JP-A-61-202950 (JP, A) Fully open 1975-143323 (JP, U) Really open 1975-90201 (JP, U) Really open 52-115029 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60B 7/00-7/06

Claims (1)

(57) [Claims] 1. A wearing the planting work portion 13 to the rear of the traveling machine body 1 and a rear wheel 5 and the front wheel 3, in the riding-type rice planting machine for steering operating the front wheel 3 by the steering wheel 7a, the front wheel 3
And connected by a plurality of spokes 25 and a rim portion 23 having the boss portion 21 and the tire 27, outside of the front wheel 3
The spokes 25 and the gaps between the spokes 25
To provide a wheel cap 29 to cover the
Cap 29 with a circular bulge 30 in the center.
is formed, and the peripheral surface portion following the bulging portion 30a has an annular shape.
The convex portion 30c becomes continuous with the bulging portion 30a in a stepped state.
The bulge 30a is formed at the end of the axle boss 21.
In addition, the outer peripheral portion is
The front wheel cap of a riding type rice transplanter, which is fixed at the current location.