JP2541992Y2 - Weeding machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weeding machine, and more particularly, to a mobile grass in which a nail for digging a root is inserted into the ground so that weeds and the like can be continuously removed by uprooting. It is related to the machine.

[0002]

2. Description of the Related Art Lawns vegetated in gardens and parks can become infested in a short period of time if they are not carefully cared for. The same applies to the management of lawns at golf courses, but recently the use of pesticides is being restricted even if secondary harm occurs due to spillage of pesticides for weeding. Prior to the use of pesticides, weeds were manually extracted, but tended to be less important because of their inefficiency and heavy labor. But,
Recently, the issue of environmental conservation has become a major issue, and weeding has come into the spotlight again. In the work, weeding and weeding machines with various improvements have been proposed and used from the viewpoints of reducing labor and efficient weeding. The simplest one is one in which a fork-shaped claw is attached to the tip of a long bar so that the worker can perform a digging operation while standing. In addition, there is an example in which an electric drill is used to cut out the root of a weed as an automation.

[0003]

[Problems to be Solved by the Invention] Although various devices have been devised as a weeding machine or the like, the simple structure as described above is put to practical use only because of the operability of the device, that is, ease of handling and compactness. It is based on the point that it is easy to satisfy the requirements such as ease of transportation by the company. However, in the former case of the above example, the operator performs the pulling-in / out operation for digging, and there is a problem that a heavy load is still imposed on the long-time work even if the worker does not assume the middle posture. In the latter case, even if the insertion depth is appropriately adjusted, the root of the lawn may be damaged. In other words, there are strengths and weaknesses that can be put to practical use up to now, and it must be said that it is extremely difficult to quickly remove weeds from lawn vegetated in a vast area.

The present invention has been made in view of the above-mentioned problem, and has as its object to continuously and constantly maintain a constant digging depth in performing a root digging operation on a nail body and to smoothly smooth only a desired portion. Capable of excavating, minimizing claw body behavior that is most effective in the ground, excavating weeds from the roots and damaging the surrounding lawn as much as possible, erecting workers It is an object of the present invention to provide a mowing machine that realizes that the work load can be reduced by always securing the walking posture and the weed can be easily identified and the operability can be improved.

[0005]

According to the present invention, a trolley which can be moved forward and backward by pushing and pulling a steering handle is provided with a nail for continuously digging to dig up roots such as weeds. Applies to weeders. The feature is that, with reference to FIG. 1, a crank arm 16 which is rotated in a vertical plane by
Is mounted on the bogie 2 behind the crank arm 16 at one end thereof, and a rocking arm 20 supported at one end and capable of swinging in a vertical plane is provided at the other end. Locking pin 22 on site
It is arranged with. The locking pin 22 has its rear end pivotally supported, and the crank pin 21 has its substantially central portion pivotally supported. The rotation of the crank arm 16 allows the root excavation nail 4 attached to the front end to have a substantially upright elliptical locus 24. Is provided. In addition, a support bar 27 extending forward is disposed on the cart 2,
The root soil sweeper 28 that slides when the root excavation nail 4 retreats following the upper arc locus 24U of the substantially upright elliptical locus 24 is attached to the distal end portion of the support bar 27.

The root soil sweeper 28 is deformable, and can maintain the sliding contact with the root soil sweeper 28 while the root digging nail 4 is displaced before and after the top of the upper arc locus 24U. Is convenient.

The swing bar 23 includes a crank pin 21.
Body 3 that lifts a portion between the nail 4 and the digging nail 4 and gently urges a forward portion of the swing bar 23 upward.
It is good to arrange 0.

The crank arm 16 and the driving device 10 for rotating the crank arm 16 are preferably arranged near the front wheels 5A and 5B supporting the truck 2.

[0009]

[Action] The bogie 2 is moved forward and backward by moving the bogie 2 close to the determined weeds, and pushing and pulling the steering handle so that the root excavating nail 4 enters a lower arc locus when the erecting nail 4 moves substantially upright. Let it. In accordance with the movement of the swinging bar 23 supported by the rocking arm 20 and the crank arm 16, the root excavating nail 4 enters the ground from near the root of the weed and has a dug depth determined by the posture of the bogie 2. Dispense the roots out of the ground. The locus of the root excavation nail 4 is a substantially upright ellipse, and the excavation area is small, and excavation to the roots of the surrounding lawn and the like is suppressed as much as possible.
When the root excavation nail 4 digs up the weeds, the weeds that fall off the root excavation nail 4 when the ascent rises along a substantially upright elliptical locus 24 are thrown forward. Even if the weeds remain attached to the root excavation nail 4, the root excavation sweeper 28 which slides when the root excavation nail 4 retreats following the upper arc locus 24U of the substantially upright elliptical locus 24 is moved forward. Is attached to the distal end portion of the support bar 27 extending toward the root, so that the root soil sweeper 28 removes weeds from the root digging nail 4. The root excavating nail 4 continuously follows the substantially upright elliptical locus 24, and the same operation can be performed when another weed is sequentially found.

The root soil sweeper 28 is deformable, and can maintain the sliding contact with the root soil sweeper 28 while the root digging nail 4 is displaced before and after the top of the upper arc locus 24U. And it is possible to lengthen the sliding time for removing the weeds attached to the root excavation nail 4,
The digging operation in the next movement of the substantially upright elliptical locus 24 is smoothly reproduced.

When the swing bar 23 is lifted at a position between the crankpin 21 and the nail 4 for digging, and a resilient body 30 for biasing the front portion of the swing bar 23 lightly upward is provided. When the driving device 10 is stopped, the root excavation nail 4 at the tip of the swing bar 23 is held at a position higher than the ground. Dolly 2 without weeding operation
When the is moved, the nail 4 for digging does not stick into the ground surface.

When the crank arm 16 and the driving device 10 for rotating the crank arm 16 are arranged near the front wheels 5A and 5B supporting the truck 2, the heaviest part on the truck 2 is concentrated near the front wheels. When the steering handle 1 is raised, the carriage 2 can be tilted forward with extremely little force. If the amount of elevation of the steering handle 1 is increased, the amount of excavation of the nail 4 for excavation is increased, so that weeds with deep roots can be removed by a simple operation.

[0013]

[Effect of the Invention] According to the present invention, a substantially straight elliptical locus can be traced to a root excavation nail attached to the tip thereof through a swing bar whose movement is restricted by a crank arm and a rocking arm, and to a lawn or the like. Only the mixed weeds can be dug up in the lower arc locus. Therefore, damage to the surrounding grass and its roots is reduced as much as possible. The substantially upright elliptical locus is continuously reproduced,
When an operator in an upright or walking posture determines weeds, the same operation can be automatically performed in order to eliminate weeds. Even if weeds adhere to the digging nail, the root soil sweeper cleans the digging nail and removes weeds and soil, preventing the next digging and avoiding unnecessary expansion of the digging. , Power consumption is also reduced. Due to the substantially upright elliptical locus of the root excavating nail, the front-rear dimension of the bogie can be suppressed short, and the device can be made compact.

If the root soil sweeper is deformable, and the root excavating nail can be kept in sliding contact with the root soil sweeper while being displaced before and after the top of the upper arc trajectory, Weeds and soil attached to the nail can be reliably wiped off. The digging function by the root digging nail during the following substantially upright elliptical trajectory is sufficiently exhibited, and the weeding operation is smoothly performed.

If the swing bar is lightly urged upward by the resilient body between the crank pin and the digging nail, the posture of the swing bar is returned to the equilibrium point when the rotation of the crank arm is stopped. , Digging nails get off the ground. Therefore, even if the bogie is moved forward, the nail for digging does not pierce the ground, and the forward movement is not hindered.

If the crank arm and the driving device for rotating the crank arm are arranged in the vicinity of the front wheels, the operating force when tilting the bogie is reduced as much as possible, whereby the bogie can be easily tilted back and forth. . Changing the amount of root excavation nail that follows a substantially upright elliptical locus into the ground is realized with a small operating force.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mower according to the present invention will be described below in detail with reference to the drawings showing an embodiment. FIG. 1 is an overall side view of a weeding machine. A digging nail 4 that continuously operates to dig up the roots of weeds 3 on a bogie 2 that can be moved forward and backward by pushing and pulling a steering handle 1 is shown. Provided. The bogie 2 has left and right front wheels 5A and 5B having a large diameter.
And a rear wheel 6A, 6B such as a caster smaller than that, and a plate 8 which extends back and forth to form the bogie 2 and which straddles the left and right frames 7A, 7B inclined slightly upward.
A drive system mounting bracket 9 having an h-shape as viewed from behind, which is a combination of flat plates, is fixed on the top. An electric motor 10 having a speed reducer 10A is fixed to the upper part of the drive system mounting bracket 9, and the main pulley 1 is attached to an output shaft 11 shown in FIG.
2 are installed. On the other hand, a shaft 13 is mounted on a lower part having a gate shape as viewed from the front-rear direction, and a slave pulley 15 (see FIG. 1) which rotates the main pulley 12 via a belt 14 is provided on one outer end. The crank arm 16 is fixed to the other external end.

In this embodiment, a disk having a relatively large weight is employed so as to function also as a fly-in wheel, with the intention of smoothing the rotation of the crank arm 16. With such a structure, when the driving device including the electric motor 10 is operated, the crank disk 16 rotates in a vertical plane. The drive system mounting bracket 9 is located above the vicinity of the front wheels 5A and 5B as shown in FIG. 1, and as described later, the truck 2 can be moved by applying a slight upward force to the steering handle 1. Consideration is made so that it is easy to change the digging amount of the root dig nail 4 by tilting forward from the state shown in the figure.

On the other hand, on the carriage 2 behind the crank disk 16, two threaded columns 17, 17 are set up. There is a support bar 19 that straddles both the posts 17, 17 and can be changed in the vertical position, and is fixed by nuts 18, 18, and the like. A rocking arm 20 that can be swung by is mounted. The crank disk 16 is provided with a crank pin 21 at a position off center, while the locking arm 2
A locking pin 22 is provided at the other end of the “0”. A swing bar 23 whose rear end is pivotally supported by the locking pin 22 and whose substantially central portion is pivotally supported by the crank pin 21 is disposed, and a nail for digging attached to the front end by rotation of the crank disk 16. 4, a substantially upright elliptical locus 24 can be drawn. Various shapes of the substantially upright elliptical locus 24 can be obtained depending on the positional relationship between the crank disk 16 and the locking arm 20, the distance from the rotation center 25 of the crank pin 21, and the distance from the rotation center 26 of the locking pin 22. FIG. 3 is a simplified illustration of an example different from FIG. 1, but the swing bar 23 supported by the crank disk 16 and the locking arm 20 is substantially attached to the tip of the root excavating nail 4 attached to the tip. An upright elliptical locus 24 can be drawn. When the substantially upright elliptical locus 24 is drawn in this manner, the amount of forward and backward movement of the lower arc locus 24B is smaller than in the case of a circular locus (not shown), and the root excavation nail 4 enters the ground. Can be returned to the ground immediately after
Digging only the targeted weeds can minimize damage to the surrounding lawn. In addition, since the front and rear widths of the trajectory are small, the behavior space before and after the root excavation nail 4 is small, and the front and rear dimensions of the bogie 2 itself of the weeding machine can be shortened. In addition, nail 4 for root excavation
Is made of a simple iron plate or hard steel, and can be relatively easily attached to and detached from the swing bar 23 with bolts or the like.
The exchange should be easy. It is sufficient if the shape is a V shape opened forward as shown in the plan view of FIG. Of course, it may be in a fork shape, but when excavating the weeds 3, a considerable force may act, and it is preferable that the weeds 3 have high rigidity. It has been found from the experience of the present inventor that the two projections as shown in the figure are preferably protruded forward.

On the trolley 2, two support bars 27, 27 extending forward are arranged, and the root excavating nail 4 has an upper arc locus 24U of a substantially upright elliptical locus.
A root soil sweeper 28 that slides back when retreating by following (see FIG. 1) is attached to the distal end portions of the support bars 27, 27. That is, the lateral bar 29 is fixed so as to connect the tips of the support bars 27, 27, and the root soil sweeper 28 is fixed substantially at the center thereof.
The root soil sweeper 28 is for sliding off the weeds and soil adhering to the root excavation nail 4 in sliding contact with the root excavation nail 4, and employs a metal plate or the like mounted in a vertical posture. The lower edge of the metal plate 28 only needs to slide on the top of the upper arc locus 24U of the substantially upright ellipse, so that soil or the like attached to the nail 4 can be completely removed. Preferably, the root soil sweeper 28 is kept in sliding contact with the root excavating nail 4 for at least a long time. Therefore, in order to maintain contact before and after the top of the upper arc of the substantially upright elliptical locus 24, the root soil sweeper 28 may be made of a deformable material such as a rubber plate. The above-mentioned swing bar 23 is provided with a resilient body 30 that lifts a portion between the crank pin 21 and the nail 4 for digging and urges a forward portion of the swing bar 23 lightly upward. This resilient body employs two long coil springs, the upper end of which is fixed to a connecting bar 31 laid over the support bars 27, 27, and the lower end of which is bolted to the swing bar 23 or the like.

The coil spring 30 has no function such as assisting the movement of the substantially upright elliptical locus 24 of the nail 4 for digging, and the swing bar 23 does not rotate when the motor 10 is stopped. Can be lifted so as not to remain in a downwardly inclined posture. That is, if the nail 4 for digging is downward when the carriage 2 is moved or the like, the nail 4 for digging pierces the ground and is prevented from moving forward, but such a situation does not occur. Thus, the swing bar 23 can be retracted to the intermediate height position. Incidentally, the coil springs 30, 30 exert a force in a direction that hinders the rotation of the crank disk 16 when the root excavating nail 4 draws the lower arc trajectory 24B of the substantially upright ellipse. Is preferably weak, and it is sufficient if the resilient force is sufficient to lift the swing bar 23 by slightly rotating the crank disk 16 on which no rotational force acts.

According to the weeding machine configured as described above,
Weeds can be removed smoothly, quickly and reliably by operating as follows. Handle support 32
The steering wheel 1 at a high position is pushed and pulled to move the carriage 2, and the electric motor 10 is driven by pressing a switch (not shown) attached to the steering handle 1. The rotational force is reduced by the speed reducer 10A, transmitted from the main pulley 12 to the belt 14, and the sub pulley 15 is rotated. The crank disk 16 rotates via the shaft 13 in a cycle of, for example, 0.5 seconds, and the swing bar 23 swings. The swing is caused by the rocking arm 2 located at the rear.
It is in a range allowed by 0, and draws a substantially upright elliptical locus 24. The position of the swing bar 23 is set such that the root excavation nail 4 enters the ground by about 1 cm, and the position of the root excavation nail 4 is determined with the root of the identified weed 3 being aimed at. The root excavating nail 4 is stabbed so as to excavate weeds from the roots, and immediately rises while moving forward. The tracing of the lower arc locus 24B is an extremely short time, and the digging area is small. Therefore, when the root excavating nail 4 is digging the weeds 3, it may hang on the lawn at the same time, but since the roots of the lawn extend widely under the ground, many of the roots do not peel off. . As shown in FIG. 3, the speed at which the root excavation nail 4 rises along the substantially upright elliptical locus 24 due to the swing of the swing bar 23 is higher than when following the lower circular arc locus 24B (the root excavation nail). The distance between the tips of No. 4 is longer). With this acceleration, when the root excavation nail 4 reaches the upper arc locus 24U, the ascending speed rapidly decreases, so that the weeds 3 attached to the root excavation nail 4 are thrown forward and upward.

However, even if the weeds 3 do not separate from the root excavation nail 4, when the weeds 3 reach the upper arc locus 24 U, the upper surface of the root excavation nail 4 slides on the root excavation sweeper 28, and the root excavation sweeper 28 is in contact therewith. The weeds 3 are wiped off by the rubbing action of 28. While the root excavation nail 4 moves along the upper arc locus 24U, it slightly rises and then descends. However, if the root soil sweeper 28 is a rubber plate or the like, the root excavation nail 4 retreats. Sliding contact is maintained in between, and weeds 3 are reliably eliminated. The root excavating nail 4 having no deposits follows the same locus again to excavate the next weed 3. Even if the digging of the weeds 3 that we have determined ends in an empty swing, it will return within 0.5 seconds, so the operator can slightly move the bogie 2 with the steering handle 1 to either the front or back, Weed 3 can be picked up at home and transferred to the next weeding. From the viewpoint of the worker, the bogie 2 is arranged so that the weeds are located in front of course. However, since the weeds washed off from the nail 4 for digging are scattered forward, If the user moves backward while pulling the steering handle 1, it becomes easier to find the next weed, and the work becomes easier.

The root of the weed 3 that has been determined is deep, and it may not be possible to dig up enough when the bogie 2 is supported by the front wheels 5A and 5B and the rear wheels 6A and 6B. At this time, when the operator applies a slight upward force to the steering handle 1, the heavy motor 10 is located near the front wheels 5A and 5B, and the posture of the bogie 2 can be easily changed. Thus, if the cart 2 is tilted forward, the lower arc locus 24B will enter deeper into the ground. In this way, with a simple operation of the steering handle 1, weeds with a shallow root and weeds with a deep root can be removed. In any case, the root excavation nail 4 still draws a substantially upright elliptical locus 24, and the excavation area is kept to the minimum necessary limit, thereby avoiding damage to the surrounding lawn. Motor 1 to stop work
Stop 0. No matter where the root excavation nail 4 stops, the swing bar 2 will remain in a state where the rotational force is released.
No. 3 stops at a position where the weight and the resilience of the coil spring 30 are balanced. The position is selected so that the root excavating nail 4 does not assume a downward posture, and, for example, the swing bar 23 is maintained in a nearly horizontal state. In this state, the carriage 2 may be moved, so that the root excavation nail 4 does not hinder the forward movement due to sticking into the ground, and does not rub the lawn during backward movement.

By the way, the type of weeds varies depending on the area, and therefore, there are cases where it is desired to increase or decrease the amount of excavation. In such a case, the nuts 18, 18 are loosened to change the height position of the support bar 19 supporting the locking arm 20, and the support bar 1
9 can be moved up and down along the column to select an appropriate position. Further, if the position where the support 17 is attached to the plate 8 can be changed, that is,
If a long hole 25 is provided in the plate 8 corresponding to the base end of the support column 17 and the standing position can be changed along the long hole 25, the shape and posture of the substantially upright elliptical locus 24 can be changed depending on the front and rear positions. Can be. By combining the above changes, an arbitrary substantially upright elliptical locus can be obtained. further,
Although not shown, the rocking arm 20 can be rocked above the center of rotation 26 with the support of the rocking arm 20 supported by the support bar 19 downward. In any case, the structure of the carriage 2 and the mounting position of the crank disk 16 may be appropriately selected. In order for the root excavating nail 4 to draw the substantially upright elliptical locus 24, it must be a movement that rises on the front side of the substantially upright elliptical locus 24 and descends on the rear side, and selects the rotation direction of the crank disk 16. Needless to say, what to do. The swing bar 23 does not need to be linear as shown in FIG. 1, but may be a bent swing bar that is convex upward as in the example of FIG. 3. It is easy to imagine that the above-mentioned crank disk may be formed as a single bar-shaped crank arm, or may be formed as a disk instead of the locking arm.

The above is an example in which the electric motor 10 is used as the driving device. In this case, the cord is routed. However, in weeding work in a large golf course, a generator may be installed nearby or a small engine may be used. The shape of the cart 2 is not limited to the shape shown in the drawings, and any shape can be used as long as it can mount the above-described devices and members. Although it is often preferable to use a small rear wheel, a rear wheel having a diameter equal to or larger than that of the front wheel may be employed. The number of the steering wheels may be one to improve the steering performance of the steering wheel. Brackets for mounting electric motors and the like can be of various forms, and it is not necessary that the number of frames on which the root soil sweeper is mounted be two.

[Brief description of the drawings]

FIG. 1 is an overall front view of a weeding machine according to the present invention.

FIG. 2 is a plan view of a weeding machine.

FIG. 3 is an explanatory diagram of swing of a swing bar and a locus of movement of a nail for digging obtained by the swing bar.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Steering handle, 2 ... Dolly, 3 ... Weeds, 4 ... Nail for root excavation, 5A, 5B ... Front wheels, 10 ... Electric motor with reduction gear (drive unit), 16 ... Crank arm (Crank disk), 20 ... Locking Arm, 21 ... crank pin,
Reference numeral 22: locking pin, 23: swing bar, 24: substantially upright elliptical locus, 24U: upper arc locus, 27: support bar, 28: root soil sweeper (metal plate, rubber plate material), 30: elastic body (coil spring) ).

Claims (4)

(57) [Scope of request for utility model registration] 1. A weeding machine comprising: a bogie capable of moving forward and backward by pushing and pulling a steering handle; and a weeding machine provided with a root excavating nail which continuously operates to excavate roots such as weeds. A crank arm, which is rotated in a vertical plane by a driving device, is provided with a crank pin at a tip portion thereof, and one end of the crank arm is supported on a carriage behind the crank arm and swings in the vertical plane. A locking arm is provided with a locking pin at the other end portion, a rear end portion is pivotally supported by the locking pin, and a substantially central portion is pivotally supported by the crank pin, and the rotation of the crank arm A swing bar for drawing a substantially upright elliptical locus on a root excavation nail attached to a front end thereof, and a support bar extending forward is provided on the bogie. And a root soil sweeper that slides when the root excavating nail retreats following the upper arc locus of the substantially upright elliptical locus is attached to a tip portion of the support bar. Machine. 2. The root soil sweeper is deformable,
2. The weeding according to claim 1, wherein the root excavation nail can maintain a sliding contact state with a root soil sweeper while being displaced before and after a top of the upper arc locus. Machine. 3. The swing bar is provided with a resilient member which lifts a portion between the crank pin and the nail for digging and lightly urges a forward portion of the swing bar upward. A weeding machine according to claim 1, characterized in that: 4. The weeding machine according to claim 1, wherein the crank arm and a driving device for rotating the crank arm are arranged near a front wheel supporting a bogie.