JPS6219041A - Lawn mower - 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 [Field of Industrial Application] The present invention relates to a lawn mower and weed cutter used for removing weeds from golf courses and the like.

[Conventional technology]

BACKGROUND ART Recently, weeding machines have been proposed in which the weeds are pulled out by sandwiching the grass between two press-contacted rolls, or between a roll and an endless belt, or between two endless belts, which are rotated while being press-contacted. For example, as shown in FIG. 4, this weeding machine consists of a machine body 1 configured to be movable on the ground by wheels 2 at the front and tail wheels 4 at the rear, a rubber roll 6 and an endless belt made of rubber, etc. When the belts 14 are placed in pressure contact with each other near the ground and rotated in the directions shown by the arrows, the grass 18 is drawn between the rubber roll 6 and the endless belt 140 and removed. In this case, the degree to which the grass is pinched by the rolls differs depending on the size of the grass and the thickness of the violet. When the grass is caught between the roll 6 and the belt 14, the thicker grass is pulled out, but the thinner grass cannot be pulled out because the thicker grass creates a larger gap between the roll and the belt 14. It was done.

Conventionally, therefore, rubber rolls have been used as described above, but if the elasticity of the rubber rolls is too good, a problem arises in that the rubber meal catches the grass but cannot pull it out.

In order to solve these drawbacks, various elastic bodies have been studied, but it is also possible to simultaneously hold thick violet grass and thin violet grass, or a large bunch of grass and a small bunch of grass at the same time. However, it was not possible to find an a-ru having the elasticity that allows both to be pulled out efficiently at the same time.

In addition, since a flat bell (flat bell) is used as the endless belt 14, weeds and grass can be removed from the belt 14 even when the grass is being used.
However, if it is caught between the rotating drive rollers 15, 16 and the rubber roll 60, the belt 14 will meander and go over the 7-rank part at the end of the drive roller, eventually causing the belt to break. . Furthermore, under such circumstances, in case A where the belt snakes to the right, the tension on the right side of the belt is too high, and the weeds are not removed uniformly during the belt movement, resulting in a poor weeding rate. In addition, when the lawn is wet, such as on rainy days, the rubber rollers, endless belts, and drive rollers are all made of rubber or vinyl, so water wet slips easily occur, causing tangles and meandering.
The fact is that it cannot be used in rainy weather because the grass is also wet and cannot be removed.

In Fig. 4, 7 and 8 are brushes, 9 is an arm that supports the rubber roll 6, and 10 is a support shaft, which is attached to a support 11 with one end fixed to the machine body 1 and a shaft rod 12 through which the shell is passed.
The roll 6 is pressed against the endless belt 14 by a spring 11 whose spring force is adjusted by a pressure adjusting nut 13. 17 is a grass catcher, 3 is a shaft rod for determining the height position of the tail wheel 4, 5 is a bracket, and 5 is a nut.

[Problem that the invention seeks to solve]

The present invention is intended to solve all of the above conventional problems,
Even if you pick all the grass with a large diameter or small diameter at the same time, or even if you pick a large bunch of grass and a small bunch of grass at the same time, it can be pulled out in good condition, and it can be pulled out regardless of rain or shine. It is an object of the present invention to provide a lawn mower and weed cutter equipped with two rolls.

[Means to solve all problems]

The lawn mower and weed cutter of the present invention has a machine body configured to be able to move entirely on the ground, and a rotary drum having a diameter smaller than that of the drum and having a rotary drum provided on the upper circumferential surface of grooves facing in the axial direction at equal intervals of Y. A pick-up roller having a diameter larger than the width of the drum is placed in pressure contact with the drum so that the contact portion between the two is close to the ground, and the drum and the pick-up roller are placed in a direction in which the 4L growing on the ground is pinched and pulled out. It is characterized by being made to rotate.

In the present invention, the surface of the rotating drum is made of an elastic material such as rubber, and the debris is provided in the width direction of the drum, but the groove shape may be provided to have a tooth profile similar to that of a normal gear, or the tooth bottom may have a semicircular cross section. Both the rotating drum and the sampling α-ra are lined with rubber as shown in Table 1, similar to the rubber roll. The extraction roller is also the same a.
It is best to use a rubber roll.

[For production]

In the present invention, the rotary rubber drum is provided with a large number of gear-shaped grooves oriented in the axial direction of the drum, and the extraction roller is provided so that a portion of the drum is fitted into the grooves, so that there is no space between the drum and the extraction roller. The grass that has been removed is removed from both ends of the width of the groove.
Because it is held down by the rubber, even if the grass is wet, the groove of the grip will reliably deform, allowing both types of grass to be gripped at the same time.

〔Example〕

The present invention will be explained below with reference to all embodiments.

Fig. 1 is a side view for fully explaining the lawn mower and weed cutter of the present invention, l is the machine body, 2 is the wheel, 4 is the entire tail wheel, and 20 is the rotary drum having gear-shaped grooves on its circumferential surface. , 21 indicates a extraction roller assembly. This weeding machine is designed to move in the direction of pressure (in the direction of the arrow) in the figure, and uses a rotating drum 20 and a weeding roller 21 to pinch and pull out the grass, or to tear off any grass that cannot be removed. It has become. plucked grass 1
The grass 8 is rolled onto the guide plate 26, and the rotating brush 22 is used to make a splashing pool in the grass catcher 17. The rotating drum 20 is pivotally supported by the lower end of the arm 27.
This arm 27 is brought into pressure contact with the extracting roller 21 by the tensile force of a spring 30 applied to a shaft 29 provided at the other end of the arm 27, with the entire fulcrum 28 centered. Note that one end of the spring 30 is attached to a shaft rod 31 inserted into the receiver of the aircraft body 1, and the tensile force of the spring 30 can be adjusted by a nut 32 attached to the shaft rod 31. ing. In this example,
Since the rotating drum 20 is pressed against the rotating drum 20 by the tensile force of the spring, the drum 20 can easily move and hold even thick grass.

When the spring is used in a pressurized state, the spring contracts, and there may be a limit to the thickness and amount of the base that can be clamped.

Rotating drum 20 and extraction roller 21 of the lawn mower and weeder of the present invention
A further explanation of the press-contact state is shown in FIG. 2. Teeth 20a and 20 formed by the groove 20b of the rotating drum 20
A part of the extraction roller 21 is made to enter between 1L, that is, into the groove 20b. It is preferable not to insert it all the way into the groove 20b, but to leave a gap as shown in the figure.

FIG. 3 shows a modification of the groove 20b, in which the groove bottom may be semicircular or semielliptical.

In the lawn mower and weed cutter of the present invention, since the rotary drum 20 is provided with a groove, the extraction row 221 has both toothed portions 2Qa formed by the groove.
, the grass that should be removed in order to contact 20a? It can be pinched more securely, and 4'fr can be removed or cut into pieces. In the summer, grass grows faster and its roots become stiffer, so there may be more grass to shred than to pull out.
In this case, the height of the plants will be uneven, so the rotary drum 20
It is a good idea to install a lawn mowing device behind the lawn. In Figure 1, 2
3 indicates a lawn mowing cutter drum having 25 blades, and 24 blades.
indicates a lawn mower blade. This lawn mower is detachable from the machine body 1 and is not attached when unnecessary.

The body 1 can adjust its position with the ground by raising and lowering a tail wheel 4 attached to the other end of an arm 33 whose one end is supported by a shaft 34 using a lifting means (not shown). ing. Note that this tail wheel may be a single iron wheel or may be a normal wheel. In FIG. 1, numerals 35 and 36 are a chino for driving a rotary drum, a lawn mower cutter drum, etc., and 37 is an engine.

In the example shown in FIG. 1, the extraction roller 21 is the rotating drum 20.
Although it is designed to be driven by, it is of course possible to drive it.

Furthermore, the extraction roller 21 may be a hollow rubber roller shaped like an automobile tire. When using such a hollow rubber roller, the advantage is that even if you pinch thick grass and thin grass at the same time, the fluid (air, etc.) inside the roller moves and deforms, so both can be sandwiched accurately. have a meeting

As a specific example of the embodiment, the outer diameter 120 of the rotating drum 20
s! , the groove width is 10 m, the groove depth is 10 mm, the outer diameter of the extraction roller 21 is 24 mm, and the outer diameter of the rotating brush 23 is 150 tt.
I got a good result with an.

〔effect〕

Since the weeding machine of the present invention does not use an endless bell, there is no problem with conventional weeding machines where the weeding machine cannot function due to the meandering of the belt. Since the rotary drum is provided with a groove, the grass is caught in two places at both ends of the groove width, so even when the grass is wet due to rain, etc., it is possible to reliably weed the grass.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the lawn mower and weeder of the present invention, Figures 2 and 3 are sectional views of main parts showing each side of the groove shape of the rotating drum, and Figure 4 is a conventional It is a side view of a weeding machine. In the figure, 1... fuselage 20... rotating drum 21... extracting roller 22... rotating brush

Claims (1)

[Claims] A machine body configured to be able to move on the ground includes a rotating drum having grooves facing in the axial direction at approximately equal intervals on its circumferential surface, and a rotating drum having a diameter smaller than that of the drum and larger than the width of the grooves. The drum and the roller are placed in pressure contact with each other so that their contact portion is close to the ground, and the drum and the extracting roller are rotated in a direction to pinch and extract grass growing on the ground. Lawn mower and weed cutter.