JP2015159728A - Weed cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting blade cover device for preventing work interruption or failure due to entanglement of weed when tall weed is cut.SOLUTION: A weed cutting guide cover 4 is disposed directly above a cutting part, at a height position separated from a blade surface of a cutting blade by 60mm to 80mm. The weed cutting guide cover 4 covers the cutting part so that a rim ahead in an advancing direction of the device body protrudes beyond an outer periphery of a rotational cutting blade, and a part directly above the cutting part is made to incline, going up toward a rim that exists ahead, seen horizontally. Wheels 43R, 43L for holding the cover height position are disposed on rims on right and left sides with respect to a device body advancing direction of the weed cutting guide cover 4.

Description

The present invention relates to an invention that is a general-purpose mower for general use and that has responded to the demands of the times and has developed a new type that has not existed before.

Among the general-purpose mowers that are currently in widespread use, (Patent Document 2) has a overwhelming number of brush cutters due to its simplicity and low price. However, although it is easy, carrying an engine-equipped machine on the shoulder and carrying it on the shoulder, operation in the presence of engine vibration, noise, and exhaust gas becomes a harsh and dangerous work for a long time, which is naturally intended for adult men. It is also a job for skilled people, and not for ordinary people, elderly people, and women.
For this reason, there has long been a need for something that is as cheap and easy as a brush cutter and that can be used by anyone, the general public, the elderly, and women easily and safely. In recent years, this demand has become stronger as the aging society continues to change and people who have been accustomed to using brush cutters for many years have become aging. .

Japanese Patent Application No. 2013-251592 JP-A-11-9051

  The present inventor has invented and commercialized a new type of mower that meets the needs of the times, which is as cheap and easy as a brush cutter, yet can be used by anyone, elderly people and women easily and safely (Patent Document 1). ). This aimed at all grasses (whole grass species, plant height of 20 cm to 1 m) as a development goal, but there were some limitations in covering all the mowing work conditions as they were. Regarding the mowing work, the cross rolling mowing method (name change, cross-round mowing method) of the present applicant's invention (Patent Document 1) has no problem with all grass species, whole grass trunks, etc., but the mowing discharge after mowing work It turns out that there are still problems in processing. When the plant height is approximately 50 cm or more, there are cases where the method of falling grass or the grass collection after it has fallen is insufficient, and some of the grass is not discharged behind the blade. This can be seen when the plant height is about 1m. This may be an obstacle to the next mowing operation, or may become entangled and interrupt the operation. Solve this problem and improve the completeness of the mower that is basically completed, and can handle all the mowing conditions throughout the year, especially the most severe conditions from early summer to summer when weeds grow. Provide a high-quality mower.

The means taken in the present invention to solve the above problems is a self-propelled self-propelled mower with three or more wheels, which is equipped with a prime mover such as an engine or a motor and drives a rotary cutting blade and a traveling drive wheel. Two of the cutting parts that are configured by superposing the main parts of the rotary cutting blade that has a rod-like blade in a cross shape or a multiple cross shape, a grass cutting promotion plate, a blade pressing cap, and a grass cutting prevention cover. The blades are lined up almost horizontally on the running surface, so that the cutting blades overlap in the same plane from the outside in the left-right direction of the machine to the center of the machine. While maintaining a rotational phase difference angle so that it does not collide, in a mower provided to rotate in a cross-round manner like a gear, a height of 60 mm to 80 mm above the cutting part and from the blade surface of the cutting blade How to proceed The upper part of the cutting part is horizontally leveled so as to cover the pair of cutting parts so that the front edge protrudes forward from the outer periphery of the rotary cutting blade, and the grass cutting guide cover is inclined higher toward the front end. It is to have established. Furthermore, cover wheels for holding the cover height position are provided on the left and right edges of the cover in the direction of travel of the body, and the cover and the wheels are integrated with each other and can be replaced with the body. Furthermore, a guide wall that guides and collects grass from both front ends toward the center of the cutting part, that is, a grass collection guide, is provided at the lower part of the cover, and the cut grass discharging unit separate from the cover is provided at the cutting grass discharge part at the rear end. The cover for adjusting the amount, that is, the discharge adjusting cover, is configured to be coupled so that the width of the cutting part is substantially fixed and the vertical adjustment is possible from the center of the cutting part to the rear.

  The present invention has the following effects by applying the above means.

By attaching this mowing guide cover even in the early summer and summer when the plant height is high, the mowing work can be done efficiently and easily even in the heavy heavy mowing work. Can be done easily, easily, and safely.

Adjust the cutting amount according to the mowing conditions by adjusting the height position of the mowing guide cover. If the overgrowth of the grass is small, if it is dry quality, if it is firm and cheap to cut, the height of about 60 mm from the blade surface of the cutting blade, etc., if the overgrowth is dense, if it is wet, When it is thin and soft, the height of about 80 mm can be continued with the highest efficiency and ease without being clogged up under the severe conditions. Furthermore, the amount of cut grass passing through the cutting part is optimally adjusted by the angle of the discharge adjustment cover. By adjusting the mowing guide cover almost horizontally when it is low and upward when it is high, the optimum mowing discharge effect is exhibited. Even if it is discharged, it cannot be used. By adjusting the discharge amount according to the cutting amount, the input / output efficiency of the cutting input and the cutting grass discharge output is maintained to the maximum.

  A first embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a right perspective view showing an embodiment of the mower according to the present invention, FIG. 2 is a left side view, FIG. 3 is a front view, and FIG. 4 is a view looking up at a cutting part from the lower front side. The illustration is partially omitted for clarity. The main configuration is an engine 1, a pair of left and right (LR) cutting parts 2, a pair of left and right (LR) driving rear wheels 3, a traveling mission 5, a cutting blade and rear wheel driving counter mission 6, and a steering handlebar 7. As a self-propelled machine, we are trying to reduce the weight by minimizing it. In particular, the pipe-shaped aluminum housing of the counter mission 6 that transmits the shaft output of the engine 1 mainly to the drive shaft and the bevel gear (not shown) and to the left and right (LR) pair of cutting blades 21 and the traveling mission 5 is also used as the body frame. Although it is a self-propelled machine, it has a very simple configuration that does not use any chassis or frame for the aircraft.

  The mowing guide cover 4 is attached to a pair of left and right (LR) cutting output portions 61 of the pipe-shaped aluminum housing at an upper position of the cutting portion 2 for easy attachment / detachment. In the cover shape, the portion covering the upper portion of the cutting portion 2 is flat and is inclined upward toward the front tip. In addition, a grass collection guide 411 that is a guide wall that guides and collects grass from both the left and right (LR) ends of the front tip toward the center of the cutting unit is provided in the lower part (FIG. 4). In addition, a discharge adjustment cover 42 that adjusts the amount of cut grass discharged separately from this cover can be fixed to the cut grass discharge section at the rear end, with the width of the cut section approximately adjustable from the center of the cut section to the rear. As shown in FIG. The upper diagram of FIG. 6 shows an arc groove adjusting mechanism having no angular position, and the lower diagram shows a multi-stage adjusting mechanism of a screw hole multi-stage arc arrangement giving priority to stability.

  Furthermore, a pair of left and right (LR) cover wheels 42 are provided to hold the height position at the left and right ends of the mowing guide cover 4 and to prevent unnecessary load from being applied to the cutting part 2 and obstructing traveling. ing. In the first embodiment, the wheel shaft is fixed to the left and right ends of the cover main body 41, and both the cover main body and the wheel are integrated and easily removable. In order to make the height positions of the cover 4 and the cutting part 2 more stable, it is better to mount the wheel 42 on the machine body side, but the structure is complicated accordingly. The height of the cover 4 from the running surface can be adjusted so that it can be set to a height of about 60 mm to 80 mm from the blade surface of the cutting blade 21 according to the mowing work conditions.

  The drive mechanism takes the shaft output of the engine 1 as it is into the counter mission 6 and converts the direction of the rotation axis mainly by the bevel gear (not shown), one to the traveling mission 5, one to the left side 2L of the cutting part, and one to the cutting The engine speed is transmitted as it is to the right side 2R. The counter mission 6 is a 1-input 3-output pipe housing-like mechanism that also serves as a fuselage frame. The output to the cutting blade through the main pipe in the brush cutter is configured by dividing the main pipe output into three. Here, the left and right reaping parts 2L and 2R rotate synchronously in the opposite directions from the outside of the body toward the center of the body. (FIGS. 4 and 5) The traveling mission 5 decelerates the rotational speed of the engine 1 and outputs it to the driving rear wheel 3.

  FIG. 7 shows a right perspective view of the mower when the mowing guide cover 4 is removed, FIG. 8 shows the cutting blade portion 21, FIG. 9 shows the scattering prevention cover 22, and shows the configuration of the cutting portion 2 in an easy-to-understand manner. The structure of the cutting part 2 that performs the mowing operation is largely divided into a cutting blade part 21 that is a rotating part and a pair of left and right (LR) scattering prevention covers 22 that can be fixed to the pipe housing of the counter mission 6 with its protective cover. Divided. Both were developed from the conventional brush cutters and developed for self-propelled use. The cutting blade portion 21 is composed of five parts: a main knife 211, a secondary knife 212, a discharge promoting plate 213, a cutting blade pressing cap 214, and a cutting blade bolt 215 (FIGS. 3, 4, and 5). The knives 211 and 212 that are cutting blades are formed in a cross shape (FIGS. 5 and 8). The discharge promotion plate 213 is used to prevent the entanglement immediately after cutting the mowing grass. The discharge promotion plate 213 is used only for a part of the handheld brush cutter, but is similar to an automatic machine such as a combine. Is used. In addition to the above, the anti-scattering cover 22 is further provided on the center side of the machine body so as to face the rotation direction of the rotary cutting blade so as to sharpen or wipe the rotary blade substantially parallel to the machine body traveling direction. A bar-shaped discharge promotion bar 221 for improving prevention of entanglement of the mowing grass is attached.

  The mowing mechanism of the mowing machine of the present invention will be described with reference to FIG. The figure is a plan perspective view for easy explanation. First, the tip of the main body 41 of the mowing guide cover 4 comes into contact with the front grass and pushes the grass forward. Immediately thereafter, cutting by the cutting blade portion 21 starts. In order to maintain the mowing effect, it is not tilted completely until just before mowing, but is tilted from the front end of the cover toward the cutting portion so that it is tilted completely horizontally immediately after mowing. Almost simultaneously with the cutting, the grass is rotated and discharged to the center of the machine body by the discharge promotion plate 213 of the cutting blade portion 21. The discharge promotion bar 221 on the anti-scattering cover 22 stops and cuts the grass that tries to continue to rotate without being discharged, and prevents the cutting blade portion 21 from being entangled. Further, the mowing grass after the mowing from the rear portion of the mowing guide cover 4 and the discharge adjusting cover 42 with the angular position adjusted and fixed is neatly discharged to the running trace. This cover enhances the discharge effect of the discharge promotion plate 213, and prevents the winding and entanglement after cutting, which is particularly seen in a long grass, so that it can be discharged to the running track in an orderly manner, that is, laid down.

  During this time, the aircraft is advancing. When this is seen with the airframe stationary, the grass that flows from the front is sucked into the mowing guide cover 4 like a shredder, cut and rolled like crushed dust through the rolls of the left and right mowing blades 21L and 21R. After exiting, the discharge outlets surrounded by the left and right discharge promotion bars 221L and 221R and the discharge adjustment cover 42 are neatly arranged and discharged as if coming out of the discharge duct.

  In this application, the new technique of cross mowing that the applicant previously invented, “Cross rolling mowing” (name change, cross round mowing) (Patent Document 1), which is still a two-dimensional perfection with only a planar mechanism, In addition, the mowing guide cover 4 is provided at the optimum position, so that the new mowing technology is completed three-dimensionally and the degree of completion is further increased. The mowed grass discharged after cutting is basically discharged by the discharge promotion plate 213, and a grass cutting load is generated on the discharge promotion plate 213 by partitioning the space with the grass cutting guide cover 4. By optimizing this load by adjusting the height of the mowing guide cover 4, the discharge is efficiently performed. When the cover 4 is not provided, the discharge effect of the discharge promotion plate 213 is greatly reduced and is closer to the idle state than when the cover is provided. Further, by adjusting the vertical angle position of the discharge adjustment cover 42 at the rear of the grass cutting guide cover 4 according to the amount of cut grass discharged, and setting the amount of cut grass discharge according to the cutting input amount, that is, the output amount optimally, the discharge promotion plate The 213 grass cutting and discharging function is most effective. The cover itself also works to hold down, and even when the grass is very tall, the cut grass discharged after cutting is neatly laid down by the running track and laid down, so that the mowing work can be performed smoothly and continuously.

  The above is the main effect of the mowing work by the mowing guide cover 4. In addition, the cutting and discharging work space is partitioned by this cover, so that the blower and the gear pump are placed in front of and behind the cutting blade portion 21 rotating at a high speed of approximately 8000 rpm. The suction exhaust effect as described above is also produced, and there is also an accompanying effect that makes cutting and discharging smoother.

  If the height of the mowing guide cover 4 is too low, it will cause running resistance and clogging, and if it is too high, no effect will be produced. If the overgrowth of the grass is small, if it is dry quality, if it is firm and cheap to cut, the height of about 60 mm from the blade surface of the cutting blade, etc., if the overgrowth is dense, if it is wet, When it is thin and soft, the height of about 80 mm can be continued with the highest efficiency and ease without being clogged when the conditions are severe. The wheel diameters on the left and right sides of the cover are also set accordingly.

  FIG. 10 shows a perspective view of the mower previously invented by the present applicant. The front cover F had the effect if it only cut efficiently. Originally, the purpose of this was to prevent dust from rolling up and cutting grass during mowing work, but in addition to that, it discovered an indispensable effect for improving mowing efficiency. When the tip of the cover comes into contact with the grass, the height of the grass is the same and the mowing surface is aligned. For example, when a person holds a sickle with his right hand and mows the grass with his left hand, he grabs the grass together and aligns the plant height, which has the same effect. However, after cutting, if the cut grass cannot be discharged efficiently one after another, the cutting operation will not be continued. If you do not defeat it immediately after cutting, you will not be able to discharge quickly. The higher the plant height (1m) is. In the present application, a cover corresponding to the front cover is drastically lowered to the vicinity of the cutting part 2 so that the grass can be quickly brought down. As a result, an unexpected effect has been found. In order to cut efficiently, the most important issue is the disposal of the cut grass after cutting. For example, a high-performance engine has the same exhaust efficiency. It is only with this innovative cutting grass discharging effect that the plant height can be drawn under the grass cutting guide cover 4 one after another so that the plant height is sucked like a shredder.

As described above, the cross-round mowing, which is an entirely new mowing method established by the self-propelled brush cutter of the present applicant's invention (Patent Document 1), has been completed in a high level both in name and reality. Like the brush cutters that have been widely used in the past, anyone has developed a device that can be operated easily and safely by anyone, elderly women, and women, following the low cost. As a conventional machine, we have developed a mowing method that is suitable for mowing, based not only on swinging the cutting blade, but also based on the results of many research and developments. A machine that doesn't make a profit is a work machine, but it is indispensable for harvesting the next crop, improving the living environment of living, and improving the natural environment. And the work is more of an elderly or female girl who has retired from the front line rather than a front-line active generation job. This trend will become increasingly strong for the elderly society. The invention of the present application will make a significant contribution in this field not only as work sharing with the active generation, but also as a corner for future social participation of the senior generation.

The widespread development of cross-round mowing brings great technological innovation to mowers that look mature and have not changed for many years.

It is a right perspective view showing the mowing machine of the first embodiment of the present application. It is a left view which shows the basic frame structure of the mowing machine of 1st Example of this application. It is a front view which shows the 1st Example of this application mowing machine. It is the lower view which lifted and looked forward of the mowing machine of 1st Example of this application. It is a plane perspective view for demonstrating the state of the mowing operation | work of the mowing machine of 1st Example of this application. It is a left perspective view which shows the mowing discharge adjustment cover of the 1st Example mowing machine of this application. It is a right perspective view which shows the state which removed the mowing grass guide cover of the 1st Example mowing machine of this application. It is a perspective view which shows the main knife, subknife, and discharge | emission promotion plate which are the right (R) cutting blade part of the 1st Example mowing machine of this application. It is a perspective view which shows the left side (L) scattering prevention cover of the 1st Example mowing machine of this application. It is a right perspective view which shows the mower of the reference patent document 1.

DESCRIPTION OF SYMBOLS 1 Engine 2 Cutting part 21 Cutting blade part 211 Main knife 212 Sub knife 213 Discharge promotion plate 214 Cutting blade presser cap 215 Cutting blade bolt 22 Scatter prevention cover 221 Discharge promotion bar 222 Scatter prevention side cover 223 Side guard plate 3 Traveling drive rear wheel 4 Grass cutting guide cover 41 Cover body 411 Grass collection guide 42 Discharge adjustment cover 43 Cover wheel 5 Traveling mission 6 Counter mission 61 Counter mission cutting portion output section 7 Handle bar 9 Main cover

Claims (5)

  A self-propelled self-propelled mower with three or more wheels, which is equipped with a prime mover such as an engine or motor and drives a rotary cutting blade and a traveling drive wheel, and has a rod-like blade configured in a cross or multiple cross shape The two parts of the cutting part 2 formed by superimposing the main parts of the rotary cutting blade, the mowing grass discharge promotion plate 213, the cutting blade presser cap 214, and the mowing grass scattering prevention cover 22 are moved substantially on the traveling surface. The blades are lined up almost horizontally, and the rotation blades keep the rotation phase difference angle so that the rotations overlap within the same plane from the outside in the horizontal direction of the machine to the center of the machine. In a lawn mower provided to rotate in a cross-round manner like a gear while being synchronized, just above the mowing part, at a height position where grass can be collected and discharged, and in the forward direction of the aircraft The edge is ahead of the outer periphery of the rotary cutting blade. So that the so as to cover the reaper, reaper directly above portion horizontally, mower, characterized in that the inclined raised towards the front edge is provided, providing the mowing guide cover 4.   The mowing machine according to claim 1, wherein a height position of the mowing guide cover 4 is set to 60 mm to 80 mm from a blade surface of the cutting blade.   The structure according to claim 1 and 2, wherein a cover wheel 43 that stably holds the height position of the cover 4 is disposed on the left and right edges of the mowing guide cover 4 in the vehicle body traveling direction. Mower.   4. A guide wall for guiding and collecting grass from both front ends toward the center of the cutting portion, that is, a grass collection guide 411, is provided at a lower portion of the grass cutting guide cover 4. Mowing machine.   The cut-out grass discharge part is provided at the rear end of the mowing guide cover 4, and the discharge adjustment cover 42, which is separate from the cover, can be adjusted with a substantially cut-out width from the center of the cut-out part to the rear so that the vertical angle can be adjusted freely. The mower according to claim 1, wherein the mowers are connected as described above.