JPH0155855B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a weeding machine used for pulling out weeds at golf courses and the like.

[Conventional technology]

BACKGROUND ART A weeding machine has been proposed in which two rolls that are pressed together or two rolls that are pressed together with an endless belt interposed between the two rolls are rotated to sandwich and pull out grass between the rolls. This weeding machine, for example,
As shown in the figure, a machine body 1 configured to be able to move on the ground using front wheels 2 and rear wheels 4 is pressed against a rubber roll 6 near the ground via an endless belt 14 made of rubber or the like. When the rubber roll 6 and the roll 15 are arranged as shown in FIG. It is designed to be drawn in and extracted. In FIG. 4, reference numeral 7 indicates a rotating brush for feeding the grass 18 to the lower surface of the roll 6, and reference numeral 8 indicates a rotating brush for feeding the grass extracted onto the endless belt 14 to the grass catcher 17. The rubber roll 6 is rotatably supported on the lower end of an arm 9 attached to the machine body 1 about a fulcrum 10, and a bolt 12 is attached to the upper end of the arm 9.
One end is connected, and this bolt 12 is inserted into a hole provided in a bracket 19 fixed to the fuselage 1, and an interposed bolt 12 is inserted between the bracket 19 and an adjustment nut 13 at the other end of the bolt 12. The arm 9 is pulled by the bolt 12 by the resilient force of the spring 11, and the rubber roll 6 is brought into pressure contact with the endless belt 14.

In such a weeding machine, the grass to be removed differs depending on how far above the ground the press-contact part between the roll 6 and the endless belt 14 is, so the machine body 1
By raising and lowering the position of the rear wheel 4 relative to
The position of the pressure contact portion above the ground is adjusted.
Incidentally, the rear wheel 4 is raised and lowered by raising and lowering the support shaft 3, which is inserted into a bracket 5 fixed to the body 1 and has a thread cut on its outer periphery, using a nut 5'.

[Problem that the invention seeks to solve]

However, in order to be able to move this type of weeding machine, the front wheels must be driven as the main wheels, and the two rolls that are in contact with each other must also be driven to rotate. A driving means such as a gasoline engine is mounted on the machine body, and the driving means is mounted above the front wheels like a conventional lawn mower. Therefore, the weeding machine itself is quite heavy. For example, a commercially available self-propelled lawn mowing machine with an engine usually weighs about 50 kg, while a weeding machine weighs about 150 kg. In addition, more weight is placed on the front wheels in particular.

In the case of an engine-equipped lawn mowing machine, as mentioned above, it is lightweight, so even if it is used in rainy weather or in wet areas with weak ground, the lawn mowing machine itself will sink and the height of mowing the lawn will be shortened. I don't really eat into the grass and tear it up. However, in the case of the weeding machine targeted by the present invention, it is nearly three times heavier than the lawn mowing machine, so when used in the same place as above, the wheels of the lawn mower will sink, and the weeding roll will not work properly. Since the position of the pressure welding part is lower, weeds can be removed, but there is a problem in that the grass is also caught in the rolls, causing the grass to be turned over or damaged, making it rough.

In addition, when the main front wheels are rubber tires, if the air pressure is not sufficient, the machine will move up and down while the weeder is running, and the left and right tires will move up and down separately, which will cause the two rolls to move up and down. The pressure contact point moves up and down, resulting in uneven weeding.

[Means for solving problems]

The weeding machine of the present invention has two rolls of a large diameter and a small diameter between front wheels and rear wheels for running which are provided on a machine body that can move on the ground, so that the contact area between the two rolls is above the ground. The grass is held in a pressed state at a predetermined height, and the two rolls are rotated to pull out the grass that is caught between the contact areas of the rolls, and the front wheels support the weight of the drive source. This is a traversing machine, and the front wheel has a rubber belt layer with treads on the outer periphery of a metal wheel body consisting of a cylindrical rim part with a large diameter, flat and wide contact surface, and a disc part that supports the rim part. It consists of two wheels formed by a metal wheel attached to a single shaft, and the rear wheel is a single metal roller-shaped wheel.

The larger the tires used on regular tractors, tillers, and automobiles, the wider the contact patch of the tire, but the weight of the tire itself also becomes heavier. Therefore, it cannot be used for the purpose of the present invention. Briefly, in the present invention, the wheel body is a flattened rim portion of the wheel disk of an automobile wheel into which a tire is fitted, and a rubber belt layer is provided instead of the tire on the outer periphery of the wheel body, that is, on the ground contact surface. It is fitted or lined. Note that the wheel body may be formed into a drum shape, and it is inexpensive to use steel as the material, but in order to reduce the weight, it is preferable to use aluminum alloy or the like. The front wheel of the type of the present invention can be made into a wheel with a width of about 30 cm and the same weight as a conventional wheel using a tire with a width of about 10 cm. Moreover, the diameter can also be increased as required. Two such wheels are attached to the front as front wheels, and both are connected by one shaft.

Similarly, the rear wheel has a larger diameter than that of a conventional weeding machine, and is a hollow drum-shaped roll.

[Effect]

In the weeding machine of the present invention, the front wheel is a disc-like wheel body with a flat ground surface and a rubber belt layer, so it is lightweight and has a large ground surface width (front wheel width), so it can be used even in rainy weather. The weeding machine does not sink even when the ground is weak, and since the two front wheels are attached to one shaft, the front wheel shaft and weeding roll are always kept parallel, allowing for accurate weeding. . In addition, the roll diameter of the rear wheel is more than double that of conventional lawn mowers, making it a single roll, which increases the ground contact area and prevents the grass from being pressed down too hard after weeding. Even if you attach the weed cutter after the rear wheels, the lawn will be mowed correctly.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a side view for explaining one embodiment of the weeding machine of the present invention, in which 20 is the weeding machine main body, 21 is the front wheel, 22 is the rear wheel, 23 is a rubber roll, 24 is a weeding pressure roll, 25 and 26 indicate rotating brushes. The example shown in FIG. 1 shows a lawn mowing machine installed after a weeding machine, with reference numeral 27 a rotary blade of the lawn mowing machine, 28 a fixed blade, and 29 a roller of the lawn mowing machine. Further, 30 indicates a handle, and 31 indicates an engine.

Figure 2 shows the front wheel 21 and rear wheel 2 of the weeding machine of the present invention.
2. Weeding rolls 23, 24 and rotating brush 2
5 is a perspective view showing the arrangement of components 5, 26, etc.; FIG.

As can be seen from FIGS. 1 and 2, two wide front wheels 21 are provided at the front of the weeding machine.
Since the engine 31 is mounted on top of it,
The weight of the engine, etc. can be supported by the front wheels 21, and the weeding machine can be prevented from sinking. The front wheel 21 has a rubber belt layer 213 provided on the ground contact surface on its outer periphery as shown in FIGS. 3 a to 3 c, and a large number of small circular protrusions on the ground contact surface as shown in FIG. 3 a. It is also good to provide various treads (to prevent slipping), such as providing protrusions parallel to the width direction as shown in b, or providing protrusions in a helical pattern as shown in c. Depending on the pattern and shape of the treads on this surface, it is possible to climb a slope of about 30 degrees, and it can also be prevented from slipping when the weeder is tilted from side to side.

The wheel body consists of a disk part 211 and a rim part 212, and the shape of this wheel body is shown in FIGS.
As shown in the figure, the cross section can be shaped like a glyph or a drum shape.

The wheel body consists of a disk part 211 and a rim part 212.
It is best to make them separately and integrate them by welding or the like. Therefore, the disk portion 211 and the rim portion 212
and may be made of different materials.

The two front wheels 21 are attached to one axle 32,
The shafts of the two weeding rolls 23 and 24 and the axle 32
By making the weeds parallel to each other, uneven weeding can be prevented.

Conventional lawn mowers use small-diameter rear wheels to hold down the grass after mowing, but the weeding machine of the present invention uses a rear wheel with a diameter that is two to three times that of the lawn mower's rear wheels. Specifically, by using rolls with a diameter of approximately 150 to 200 mm, the weeding machine is prevented from sinking into the ground, and the weeding position is always maintained at the same height, improving weeding performance. Also, even if the lawn mowing machine is attached to the rear, the diameter of the rear wheels is large, so even if the rear wheels step on the grass, the grass will not be damaged and will stand up easily, so the lawn mowing machine will cut the grass to a uniform height. be able to.

〔effect〕

The weeding machine of the present invention uses a wheel consisting of a disk part and a rim part and a rubber belt layer on the outer periphery instead of the conventional tire. In addition to being lightweight, the weeding position does not move up or down due to deformation of the wheel itself, unlike conventional tires, and weeds can always be stably removed at a constant height above the ground. Also, because it is lighter,
Because the width of the wheels can be made wider and the ground contact area larger, the weeder itself will not sink even on soft ground after rain. In addition, by increasing the diameter of the rear wheels, the weeding machine does not sink and the weeding position can always be maintained at a constant height.In addition, there is no risk of overturning while driving, and there is no conventional lawn mowing at the rear. It also has secondary effects such as being able to attach machines.

[Brief explanation of drawings]

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a perspective view of essential parts showing the arrangement of wheels etc. of the weeding machine shown in Fig. 1, and Figs. 3 a to c are examples of front wheels. FIG. 4 is a partially cutaway front view showing an example of a conventional weeding machine. In the diagram, 21...Front wheel, 22...Rear wheel, 23,2
4... Weeding roll, 25, 26... Rotating brush, 32... Axle.

Claims (1)

[Claims] 1. Two rolls, one with a large diameter and one with a small diameter, are placed between a front wheel and a rear wheel for running provided on the aircraft body so that the contact area between the two is at a predetermined height above the ground. The weeding machine has a structure in which the two rolls are held in a pressed state and the two rolls are rotated to remove grass caught between the contact portions of the rolls, and the front wheels support the weight of the drive source, and the front wheels are , two wheels formed by forming a rubber belt layer with treads on the outer periphery of a metal wheel body consisting of a large diameter, flat and wide cylindrical rim part and a disc part supporting the rim part. A weeding machine that consists of a weeding machine that is attached to a single shaft, and the rear wheel is a single metal roller-like wheel.