JPH04297302A - Wheel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to wheels mounted on running vehicles such as rice transplanters, direct sowing machines, and tractors.

0002

2. Description of the Related Art Conventionally, there has been a hollow wheel as shown in Japanese Patent Application Laid-Open No. 2-237801.

0003

[Problems to be Solved by the Invention] In the conventional wheels described above, since the inside of the hollow part is under body pressure, if a rice transplanter etc. equipped with wheels is stored in a barn or the like, the weight of the machine body will cause the wheel to touch the ground. The aircraft would be stored in a dented state for a long period of time, and the dent would not be repaired when it was used next time, resulting in a reduction in driving performance (especially during cold seasons, when the aircraft inside the hollow part (This is noticeable because it is shrinking). Furthermore, when manufacturing the above-mentioned conventional wheels, in order to insert a nozzle into the tire to apply internal pressure to the hollow part, the hole had to be plugged afterwards, resulting in poor productivity.

0004

[Means for Solving the Problems] In order to solve the problems of the prior art described above, the present invention provides a wheel integrally formed with a tire 12 having a hollow portion 17 so as to cover an annular rim 5. This wheel is characterized in that a gas injection valve 7 is attached to the annular rim 5 so that gas can be introduced into the hollow part 17 and internal pressure can be applied.

[0005]

According to the present invention, various problems of the conventional art can be appropriately solved with a simple structure, and since the gas injection valve 7 is attached to the annular rim 5, the tire 12 so as to cover the annular rim 5 and the hollow part 1
7 can be easily formed integrally without impairing the airtightness.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in the drawings will be described below. Reference numeral 1 denotes an iron tubular boss serving as a wheel attachment portion for attaching a wheel to an axle 2 of a riding rice transplanter A, and is provided with a hole 4 through which a pin 3 for attaching to the axle 2 passes.

Reference numeral 5 denotes an annular rim made of iron pipe material, which includes the boss 1 and four spokes 6 made of iron pipe material.
They are welded together and integrated. Reference numeral 7 denotes a gas injection valve, and a hole 8 provided in the annular rim 5 is connected to the gas injection valve.
An iron pipe 9 penetrates through 8 and is welded to the annular rim 5.
, a valve 10 attached to the outer end of the iron pipe 9, and a cap (lid) 11.

Reference numeral 12 denotes a tire made of synthetic rubber or other elastic material, and is fixed to the entire circumference of the annular rim 5 by the manufacturing method described below. First, the left and right side parts 13 and 14 constituting the tire 12 are each molded from raw rubber using molds. Rim covering parts 15, 15 are formed on the molded left and right side parts 13, 14 so as to cover the outer periphery of the annular rim 5, and propulsion lugs 16 are formed at regular intervals on the outer periphery of the ground contact. integrally formed, and hollow part 17
are formed to communicate in the circumferential direction. Further, inside the rim covering parts 15, 15 of the left and right side parts 13, 14, spoke covering parts 18, 18 are formed of the same raw rubber.

Then, adhesive 19 is applied between the left and right side parts 13 and 14 and the joints with the annular rim 5 and spokes 6, and the left and right side parts 13 and 14 are attached to the annular rim 5 and spokes 6. ... is placed between the left and right molds of the wheel, with the left and right sides sandwiched between them, the cap 11 is removed, and while compressed and heated air at a constant pressure is fed into the hollow part 17 from the valve 10, hot press molding is performed using the left and right molds to make the raw rubber. A wheel is manufactured by sulfiding (see the conventional example for the manufacturing method).

On the other hand, the riding type rice transplanter A is a riding type towing vehicle 20.
A rice transplanting machine 22 is attached to the rear part of the rice transplanter via a link mechanism 21 so as to be vertically movable. The passenger type towing vehicle 20 uses the above-mentioned wheels as front wheels, and is provided with a planar step 23 on the vehicle body, and is constituted by a steering handle 24, a driver's seat 25, and the like.

The rice transplanting machine 22 is a general type, and includes a planting part transmission case 26 that also serves as a frame, a seedling tank 27 that can freely reciprocate left and right, a soil leveling float 28, a seedling planting tool 29, etc. It is made up of. Reference numeral 30 denotes a disc-shaped cover that shields the outer surface of the wheel, and covers the right side 14 of the wheel.
The outer periphery folded portion 32 is engaged with a mounting groove 31 formed in the mounting groove 31 to be fixed.

As shown in FIG. 5, the step 23 includes a flat plane part 23a which is a footrest for the operator at the front of the cockpit seat 25, and a height in front of the front end of the plane part 23a. It is formed from an inclined inclined surface portion 23b and a flat portion 23c extending horizontally forward from the front end of the inclined surface portion 23b. The inclined surface portion 23b includes a pressure-sensitive switch 33 for turning on and off the main clutch, a pressure-sensitive switch 34 for turning on and off the work clutch provided in the power system to the rice-transplanting machine 22, and a pressure-sensitive switch 34 for forcibly raising the rice-transplanting machine 22. Pressure switch 35, pressure sensitive switch 36 that automatically controls the rice transplanting machine 22 up and down to the appropriate seedling planting depth, pressure sensitive switch 3 that cuts off the drive of the left drive rear wheel and applies the brakes.
7. A pressure-sensitive switch 38 that cuts off the drive of the right-hand drive rear wheel and applies the brakes. A pressure-sensitive switch 39 that cuts off the drive of both the right-hand drive rear wheels and applies the brakes. The surface of each pressure-sensitive switch 33 is substantially the same as the surface of the inclined surface portion 23b, so that when the front part of the passenger towing vehicle 20 is placed on the ridge to get on and off the vehicle or when loading seedlings from the ridge. It does not get in the way and is very easy to work with. In addition, you can use the rice transplanting machine 2 with your feet.
2 vertical movements are possible, making it easier to operate the handle when turning the machine during rice transplanting work.

Next, a description will be given of the case where the riding-type rice transplanter A of the above embodiment performs rice planting work in a paddy field. When seedlings are placed in the seedling tank 27, each part is driven by the engine to move the machine forward, and the work clutch is engaged, rice planting work can be carried out. At this time, since the outside of the front wheel is shielded by the cover 30, the wheel lifts up the mud and spits it out to the outside of the wheel, allowing for good seedling planting without pushing down the already planted seedlings that were planted in the previous process. Can work.

[0014] Then, if you store the rice transplanter in a barn after rice transplanting work and use it a year later, even if the ground contact part of the wheel remains depressed due to the weight of the machine,
Remove the cap 11 of the gas injection valve 7 and remove the valve 10.
If more air is introduced and pressurized, the dent will disappear and the original running performance can be achieved. In addition, in the above example,
Although the wheels used in a riding rice transplanter have been described, it goes without saying that the wheels may be used in any other running vehicle such as a rush transplanter, a direct sowing machine, or a tractor.

[Brief explanation of the drawing]

[Figure 1] Rear view of the wheel

[Figure 2] A-A sectional view in Figure 1

[Figure 3] BB sectional view in Figure 1

[Fig. 4] A plan view of a riding rice transplanter equipped with front wheels embodying the present invention.

[Figure 5] Perspective view of steps

[Explanation of symbols]

5 Annular rim 7 Gas injection valve 7 12 Tires 17 Hollow part

Claims (1)

[Claims] Claim 1: In a wheel integrally formed with a tire 12 having a hollow part 17 so as to cover an annular rim 5, a tire 12 is provided on the annular rim 5 so that gas can be introduced into the hollow part 17 and internal pressure can be applied thereto. A wheel characterized by being equipped with a gas injection valve 7.