JPH06269201A - Weeder in lawn - Google Patents

Abstract

PURPOSE:To provide a weeder which can pull out only weeds growing in lawn without spoiling the lawn. CONSTITUTION:The rectangular frame 1 surrounding the machine is made upright on its one side and used as a handle and provided with a couple of front free wheels 11 and rear free wheels 8, further equipped with a couple of the right and left rotary blades 25, 25' driven by the motor in an intermediate position between the front and rear wheels. The rotary blades are held between the rotary disk 20 fitted to the grooved wheel 17 and the rotary disk-supporting arm 24 and rotated as they slides between the blade opener 21 fixed to the shaft 19 and the rotary blade supporter 22. The right and left rotary blades 25, 25' are changed their angles to each other by the rotary blade opener 22 and allowed to sink into the soil whereby only weeds can be pulled out from the lawn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weeder that removes only weeds that occur in lawns, especially grass weeds at a golf course, without removing the grass from the roots.

[0002]

2. Description of the Related Art Conventionally, for weeding in a place where weeds are growing all over the field or in a field, a machine for weeding with a few wings attached to a horizontal axis is well known, and they are all dug up soil. Weeds are not used in the market yet because the roots are cut off and the shoots bud again later.

Even less, weeds growing on the whole lawn,
Weeds that grow on the grass of the golf course can only be removed by weeding one by one, and the use of some kind of machine will quickly damage the grass itself. In addition, the conventional machine is almost impossible to respond carefully to weeds, it does not show the behavior to extract even the roots of weeds, and it is necessary to cut it and stop it for a while even if it is weeding. It had been.

[0004]

Problems to be Solved by the Invention To eliminate the above-mentioned troubles and to make a machine capable of completely removing and removing the weeds growing in the lawn, including the roots, to carry out trial experiments and directly annoy human labor. However, the most important object of the present invention is to develop a machine that can be carefully weeded by hand.

[0005]

As described above, according to the present invention, one of the machine frames surrounded by a rectangle is raised upward to form a handle portion, and a floating front wheel and a freely movable front and rear of the machine frame are provided. A rear wheel is provided, and the machine frame can be moved up and down by springs of the rear wheel support, and two left and right rotary blades driven by power from a prime mover are provided at intermediate positions between the front and rear wheels. This rotary blade is composed of a cutting blade and a straight blade whose tips are alternately bent. This is a rotary blade attached to the groove wheel, held by a rotary plate support arm, and fixed to the shaft. It is sandwiched between the member and the rotary blade support member and slidingly rotates. The two left and right rotary blades have a structure in which the angle changes with respect to the axis according to the rotation due to the angle gradient of the rotary blade opening / closing member, and both blades are fully open on the one hand and fully closed on the other hand, and there is a notch at the point of full closure. A weeding machine is designed so that a blade and a straight blade work together, and the weeding machine is characterized in that it weeds only the weeds in the lawn by submerging it in the soil.

Next, the machine of the present invention will be described in detail with reference to the drawings together with its operation. The machine frame 1 in Fig. 1 encloses the whole in a substantially rectangular shape, and the part on the right side that is a handle is lightly raised by a person and is raised to a horizontal position. And a lever L for supporting the front side of the machine frame 1 via a shaft 10 and a front wheel 11, and a rear side of the machine frame 1 supported by a spring 9 (FIG. 2) that can move the machine frame 1 up and down with a small force. Since there is a floating rear wheel 8, the direction can be freely set. Supports 2 are independently welded to the left and right sides of the machine frame 1, and a column 4 is provided in a hole formed in the center of a support plate 3 protruding horizontally to the side, and a wheel support member 5 with a spring 9 interposed therebetween. There is a rear wheel 8 which is fixed to the wheel support 6 by means of a shaft 7 on the wheel support 6. Due to the spring 9, the column 4 can be easily lowered by the length X by simply pressing the machine frame 1 lightly downward, and the rotary blades 25, 25 'accordingly.
Is embedded under the grass ground for a length of Y, and the two blades are closed according to the depth of the root of the weed, and the root is sandwiched in a palmar state and extracted (Fig. 2). The idle front wheel 1 is the fulcrum of the vertical movement of the machine frame 1.
1 axis 10.

In FIG. 1, the rotation from the gasoline engine E is transmitted from the groove wheel 12 to the large groove wheel 15 by the V belt B and from the groove wheel 16 fixed to the shaft 14 of the bearing bearing 13 to the groove wheel 17. On both sides of this, there are rotary plates 20, 20 which are integrated with the groove wheel 17 and rotate by sliding with the shaft 19, and these are fixed by 4 to 6 rotary plate support arms 24. In FIG. 3, a rotary blade opening / closing member 21, a rotary blade support member 22 fixedly integrated with the shaft 19, and a rotary blade holding spring 23 attached to the rotary blade support member 22.
Are fixed by screws of the shaft fixing base 18 shown in FIGS. 1 and 2. When changing the angle of the rotary blade opening / closing member 21, the screw can be loosened and the shaft 19 can be rotated freely.

Next, the rotational behavior of the rotary blades 25 and 25 ', which is an important point of the present invention, will be described. The rotary blade on the left side of FIG. 3 has a cutting blade 25 whose tip is bent in an inverted L shape and a straight blade. The straight blades 25 'are set alternately, and the number thereof can be appropriately designed by the width and the length of the blade. The shaft 19 and the rotary plate support arm 24 penetrate through the two rotary blades, and the rotary blade opening / closing member 21 and the rotary blade supporting member 21 are mounted with play in the elliptical hole 29 and the shaft hole which are tapered. It is dynamically clamped to 22. Although the sliding portion 28 does not generate much friction, it is also within the scope of the present invention to use a ball bearing or a material having a good sliding property. In FIG. 2, reference numeral 26 is an engine support frame, and 27 is a groove wheel support frame.

Looking at the right side of FIG. 3, the shaded portion is a fixed portion, and the rotary blades 25 and 25 'are the rotary plate supporting arms 2
Rotate at 4 and set the two blades fully open at about 45 ° forward with respect to the ground depending on the angle of the rotary blade opening / closing member 21 and sunk the machine frame 1 to advance to the vicinity of the weed root. First, the grass root is pulled out at the point P where the cutting blade H and the straight blade K join together, that is, when the blade is fully closed. The length at the time of gasping is about 2 cm, and then the two blades start to open about 45 ° rearward with respect to the ground by moving forward. Driven rotary blade is about 150
At ~ 200 rpm, the width of the blade piercing the lawn is about 2 cm, and the length is about 12 to 13 cm, which hardly damages the grass itself. It is important to note that one rotary blade is manufactured alternately with the cutting blades H and the straight blades K, but when fixing the two rotary blades, the cutting blades H and the straight blades K always make the palm plane P. Must be formed. Therefore, in one rotary blade, the opposite sides of the cutting blade H and the straight blade K on the center line do not have to have the same shape.

Further, a support shaft is provided at the rear of the machine frame, and a nylon brush that bites into the rotary blade is set in the same direction as the rotary blade, and the grass that has fallen is dropped through a wire mesh tube to the rear box. The ones to be collected in have already been prototyped. In addition, a machine made with two wheels is an excellent machine that can be used very easily.

[0011]

Operation: The machine frame floats and moves in the spring type, and when there are weeds, the handle is pushed to let the blade bite into the soil, and when the root is pinched and pulled out, it is automatically lifted. Even if you bite a stone or the like, the blade will open due to the spring action. Not only this machine can open and close two rotary blades, but also the inverted L-shaped cutting blade H and the straight blade K come into contact with the inner angles of the cutting blades to engage the palm (Fig. 3), so that they can be pinched. The action of digging from under the roots works well and weeds can be well weeded.

[0012]

[Example] When the blade is sunk approximately 7 cm in front of the weeds scattered in the lawn that is neatly present on one side, the two blades that were in a closed state sandwiched the root and pulled out almost completely. I was able to do it. Even the slightly taller wormwood could be picked up cleanly by squeezing it with the machine frame floating before sinking the blade and continuing to sink the blade.

[0013]

EFFECTS OF THE INVENTION Conventionally, only weeds generated in golf courses, gardens, and other lawns have to be weeded without damaging the turf. , Using conventional machinery, it damages the turf extensively and has only been able to stir the soil. The machine of this invention does the work of carefully uprooting and weeding, and it does it as if relying on humans while checking it with human eyes. A person can find the grass while standing and carry the machine to that position,
The operation is light and compact, so it is very small and very excellent.

[0014]

[Brief description of drawings]

FIG. 1 is a plan view of a weeder according to the present invention.

[Figure 2] Side view of the weeder

FIG. 3 is a plan view showing a structure of a rotary blade portion of the weeder.

[Explanation of symbols]

 1 Machine Frame 2 Support 3 Support Plate 4 Strut 5 Wheel Support Member 8 Floating Rear Wheel 9 Spring 11 Floating Front Wheel 17 Groove Wheel 19 Shaft 20 Rotating Plate 21 Rotating Blade Opening / Closing Member 22 Rotating Blade Supporting Member 23 Rotating Blade Holding Spring 24 Rotating Plate Support arm 25 rotary cutting blade 25 'rotary straight blade

Claims (1)

[Claims] 1. A rectangular frame surrounding one of the machine frames is raised upward to form a handle portion, front and rear of the machine frame are provided with a floating front wheel and a freely movable directional rear wheel, respectively. The machine frame can move up and down, and has two left and right rotary blades, which are driven by the power from the prime mover, at intermediate positions between the front and rear wheels. This rotary blade is composed of a cutting blade and a straight blade whose tips are alternately bent. This is a rotary blade attached to the groove wheel, held by a rotary plate support arm, and fixed to the shaft. It is sandwiched between the member and the rotary blade support member and slidingly rotates. The two left and right rotary blades have a structure in which the angle changes with respect to the axis according to the rotation due to the angle gradient of the rotary blade opening / closing member, and both blades are fully open on the one hand and fully closed on the other hand, and there is a notch at the point of full closure. A weeding machine, which is designed so that a blade and a straight blade work together, and weeds only the weeds in the lawn by submerging it in the soil.