JP3793178B2 - Mower protective cover and mower - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mower protective cover and a mower, and more particularly to a mower protective cover and a mower having high safety and high work efficiency.
[0002]
[Prior art]
In general, a mower having a rotary blade can remove a large amount of weeds in a short time, and is widely used not only by specialists but also in general households. However, the rotating blade that rotates at high speed not only puts the operator's feet at risk, but also has a high possibility of causing danger to the surroundings because the cut weeds and pebbles that are lost in the weeds are blown away. Therefore, a protective device for performing such dangerous work more safely has been considered.
[0003]
For example, in Patent Document 1, as “weed root and weed processing turntable”, “a fixed rod device and a weed root treatment plate are attached to a circular turntable, and a device for treating weed root and weed by the rotational power of a mower” Is disclosed.
In the invention disclosed in this patent document 1, by installing a scattered matter prevention cover, human bodies, crops, fruits, etc. from scattered matter such as earth and sand, stones and lump produced by rotation of a fixed bar device or a weed root treatment plate Can prevent injury and damage.
[0004]
Further, Patent Document 2 includes, as a “mower”, a “rotary cutting blade that is driven by an electric motor and mows grass by rotating, and a protective cover provided to cover the periphery of the rotating cutting blade. In the mower, there is disclosed a “mower” characterized in that a movable piece that slides on the inner surface of the protective cover by operating from the outside of the protective cover is provided.
In the invention disclosed in Patent Document 2, a protective cover provided so as to cover the periphery of the rotary cutting blade prevents pebbles and the like that are blown together with the cut grass from being scattered to the operator side, and further, the protective cover. By operating the movable piece provided on the inner surface, it is possible to remove grass deposited and deposited in the protective cover safely and easily without the operator's hand touching the rotary cutting blade.
[0005]
In Patent Document 3, as “electric washing machine using mower”, “sprinkler pipe is fixed to mower's operation canister, joint metal fitting is attached to sprinkler pipe water supply port, special hose is connected, sprinkler pipe rotating shaft part The support bracket that reinforces the rotating shaft part is made by rotating the brush with a motor by working with the gear and bearing and the cleaning brush attached to the nut, and interlocking with the gear attached instead of the mowing blade. An electric washing machine using a mower connected to a drive gear built-in box is disclosed.
In the invention disclosed in Patent Document 3, it is possible to facilitate cleaning of high places such as box-type trucks, buses, and scissors by an electric washer applying a mower structure, and to cover the entire upper surface of the cleaning brush. A cover is attached to prevent water splashing during work.
[0006]
Patent Document 4 discloses, as a “mowing machine”, a “mowing machine having a disc-shaped rotary blade at its tip, which receives cut grass cut by the rotary blade and guides it to the outside of the rotary blade. A mowing machine characterized in that a plate or wire plate grass guide is provided on the main shaft above the rotary blade so that the height can be changed, and a safety cover is provided above the grass guide on the main shaft so that the height can be changed. It is disclosed.
In the invention disclosed in this patent document 4, the grass receiving guide attached to the mower receives and drops the cut grass that is cut and scattered by centrifugal force, so that the cut grass can be aligned and cut. You can save the work of sweeping grass later. Further, since a safety cover is installed above the grass receiving guide, scattering of stones and the like can be prevented. Further, since the height of the grass receiving guide and the safety cover can be changed, it is possible to cope with various cutting heights while ensuring safety.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-220013 [Patent Document 2]
JP-A-9-121646 [Patent Document 3]
JP 2001-38307 A [Patent Document 4]
Japanese Patent Laid-Open No. 11-220922
[Problems to be solved by the invention]
However, in the conventional technique described in Patent Document 1, the flying object prevention cover is attached by screwing a thumbscrew into a plurality of adjustment holes according to the size and purpose of the circular rotating disk, but there are many adjustment holes. There is a problem that the mounting position is easy to be mistaken and the mounting is complicated. Moreover, since the flying object prevention cover is covered over the entire circumference of the rotating disk, there is a problem that visibility during work is inferior. Furthermore, it was necessary to introduce the grass to be mowed inside the cover, and there was a problem that it was not suitable for high-height mowing work.
Moreover, in patent document 2, although the shape of a protective cover is not limited, the semicircle-shaped protective cover is clearly shown in the part which hits an operator's foot side, and with this protective cover, it is a pebble for an operator. However, there is a problem that it is not possible to prevent pebbles from being scattered to humans and buildings around.
[0009]
Furthermore, in the conventional technique described in Patent Document 3, a cover that covers the entire upper surface of the circular cleaning brush is attached, which is effective in preventing water splashing during cleaning. There was a problem that visibility was inferior. Further, if there is a cover on the upper surface of the rotary blade in the mower, it is difficult to cut tall grass, and there is a problem that it is not possible to cut various grass heights as in the invention disclosed in Patent Document 1. .
And in the prior art described in patent document 4, although a safety cover can respond to various cutting heights by changing a height position, since it is installed in the upper part away from the rotary blade, it is scattered. There was a problem that all the pebbles to be received could not be received and safety was inferior.
[0010]
The present invention has been made in response to such a conventional situation, and provides a protective cover and a mowing machine for a mower that have good visibility, high safety, can be easily mounted, and can cope with various plant heights. For the purpose.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a mower according to a first aspect of the present invention is a protective cover for a mower having a circular rotary blade and a shaft portion obliquely installed on the rotary blade. And a first protective part that covers the substantially semicircular side of the side where the slanting is provided, and a rake-like covering that is provided on the first protective part and extends over the remaining semicircular circumference. And a first protection portion including a fixing portion capable of gripping the shaft portion. The fixing portion includes a pair of attachment plates capable of sandwiching the shaft portion, one of the attachment plates, a pedestal for connecting the first protective portion, provided with the angle adjustment joint between one and the pedestal of the mounting plate, the angle adjusting joint with shall be pivoted respectively to one and the pedestal of the mounting plate is there.
The protective cover for a mower having the above-described structure has an effect that the operator who grips the shaft portion is protected by the first protection portion, and the surroundings are protected by the second protection portion. In addition, since the second protective part is a rake-like shape, it is easy to reach a rake-like gap when mowing grass that is higher than the height of the rake-like protective part at the same time as ensuring the visibility of the operator. Introduces grass, and prevents grass and its stem from escaping from the rotating blade, thereby facilitating cutting. Furthermore, the first protective part has an action of being attached to the shaft part by the fixing part.
[0012]
Further, a protective cover for a mower according to a second aspect of the present invention is a protective cover for a mower having a circular rotary blade and a shaft portion inclined to the rotary blade, and the rotary blade has a rake shape. The protective portion includes a fixed portion that can hold the shaft portion. The fixed portion includes a pair of mounting plates that can sandwich the shaft portion, one of the mounting plates, and the protective portion. And an angle adjustment joint between one of the mounting plates and the pedestal, and the angle adjustment joints are pivotally provided on one of the mounting plates and the pedestal, respectively .
The protective cover for a mower having the above-described configuration has an effect of protecting the worker and the surroundings in a state in which the visibility of the worker is ensured because the protective portion is in the shape of a rake. Moreover, it has the effect | action that it mounts | wears with a shaft part by a fixing | fixed part. Further, similarly to the first aspect of the invention, the grass and its stem are prevented from escaping from the rotary blade and have an effect of facilitating cutting.
[0014]
According to a third aspect of the present invention, there is provided a mower according to the first or second aspect , a rotary blade covered by the protective cover for the mower, and one end of the rotary blade. The shaft portion is provided with an inclined portion, and the power portion of the rotary blade provided at the other end of the shaft portion.
The mower having the above-described configuration is provided with the protective cover for the mower according to claim 1 or 2 to protect the worker and the surroundings while keeping the worker's visibility secured. Has the effect of doing.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a protective cover for a mower according to the present invention will be described with reference to FIGS. (Corresponding to Claim 1 or Claim 2 )
FIG. 1 is an external view of a protective cover for a mower according to the present embodiment.
In FIG. 1, the mower protective cover 1 includes a semicircular rear protective cover 2 and a rake-shaped front protective cover 3. The rear protective cover 2 is a fixture 5 for mounting on the shaft of the mower on the semicircular semicircular disk 4 provided with an edge capable of covering the upper surface and the side surface of the rotary blade of the mower. In addition, two rear attachment holes 6 for mounting the front protective cover 3 are provided at two positions on the end portion.
[0016]
The fixing tool 5 is configured such that a shaft of a mower is sandwiched between an upper mounting plate 7 and a lower mounting plate 8, and a bolt is screwed and fixed with a nut (not shown). Further, the lower mounting plate 8 is pivotally mounted on the base 9 so that the angle can be changed with the pin 10 as an axis. By tightening the pin 10, the changed angle can be fixed.
Since the fixing tool 5 is attached by bolting, it can be easily attached to an existing mower. Furthermore, since the angle of the lower mounting plate 8 can be changed, it is possible to cope with the mounting of a mower with a different shaft mounting angle.
[0017]
Further, when the upper mounting plate 7 and the lower mounting plate 8 are provided with rubber or the like on the inner side, slipping is prevented and the shaft can be fixed more firmly. Further, although not shown, if the size adjusting mounting plate is fitted inside the upper mounting plate 7 and the lower mounting plate 8, it can be mounted even if the shafts have different thicknesses. In addition to the bolt, a thumbscrew or the like may be used as the fixing means.
[0018]
On the other hand, in the front protection cover 3, a plurality of vertical protection plates 12 are attached to a semicircular base 11 so as to cover a substantially half circumference of the rotary blade of the mower. Two front mounting holes 13 for mounting on the rear protective cover 2 are provided at two locations. Although not shown, the rear mounting hole 6 and the front mounting hole 13 are connected by bolts and nuts, so that they can be easily attached and detached. It can be used properly according to the application. The same applies to the rear mounting holes 6, but the number of front mounting holes 13 is not limited.
Alternatively, the front protective cover 3 may be an integrated rake-like protective cover structure that is not attached to or detached from the rear protective cover 2, and in this case, the attachment to the mower becomes simple.
[0019]
Here, the effect | action of the protective cover for mowers is demonstrated using FIG.
FIG. 2A is a top view when the mower protective cover according to the present embodiment is attached to the mower, and FIG. 2B is a side view when the mower protective cover is also attached to the mower. It is.
2 (a) and 2 (b), the rear protective cover 2 of the mower protective cover 1 has the upper mounting plate 7 and the lower mounting plate 8 of the fixture 5 gripping the shaft 14 of the mower, and four bolts. It is fixed at 15 and attached to the mower. The front protective cover 3 is connected to the rear protective cover 2 by screwing two bolts 16 into the front mounting hole 13 and the rear mounting hole 6 respectively. Further, the rotary blade 17 can be seen from the gaps between the plurality of vertical protection plates 12.
[0020]
As shown in FIGS. 2 (a) and 2 (b), when the mower protective cover 1 is attached to the mower, the rear protective cover 2 is located on the shaft 14 side, that is, on the operator's foot side. Since the rotating blade 17 that rotates at a high speed prevents the operator's feet from being damaged and clothes are caught in, and the scattering of pebbles and the like that are repelled by the rotating blade 17 is difficult to stop inside the semicircular disk 4, the worker can work safely. It can be carried out.
[0021]
On the other hand, compared with the rear protective cover 4, the front protective cover 3 is located on the side away from the operator and is mainly covered with the rotary blade 17 on the side of mowing the grass, but the shape is rake-like. It is possible to work while confirming the rotary blade 17 and its surroundings from the gap, and it is possible to avoid work on soil with a lot of pebbles and the like and obstacles that damage the rotary blade 17 at an early stage.
In addition, since the plurality of vertical protection plates 12 of the front protective cover 3 can suppress the scattering of pebbles and the like other than directly above, high safety with respect to the surroundings can be ensured.
Further, each of the vertical protection plates 12 has a bowl shape, and a flat portion is vertically attached to the base 11. This front protective cover 3 is suitable for removing tall grass, and grass and grass stems can be easily introduced into a wide space between the vertical protective plates 12 to protect the vertical protection The plate 12 serves as a grass support plate, prevents the grass from bending or escaping, facilitates cutting with the rotary blade 17, and, as a result, improves work efficiency.
[0022]
Further, the mower protective cover 1 is a circular cover that covers the entire circumference of the rotary blade 17 with a rake-like vertical protective plate 12 like the front protective cover 3 without providing the rear protective cover 2. The fixing portion 5 may be provided on the circular cover and attached to the shaft 14. In this case, as compared with the case where the rear protective cover 2 and the front protective cover 3 are designed to be detachable, there is an advantage that the attachment to the mower is changed from two stages to one stage, and the installation is simple. Further, although the prevention of scattering of pebbles and the like is slightly inferior, the operator can visually recognize the rotary blade 17 and its surroundings over the entire circumference.
[0023]
Next, a modification of the front protective cover will be described with reference to FIG.
FIG. 3 is an external view of a modified example of the front protective cover of the mower protective cover according to the present embodiment.
In FIG. 3, the front protective cover 3 has a plurality of horizontal protection plates 18 attached to the base 11 in a rake shape, and two front attachment holes 13 are provided at the ends of the base 11. .
When the front protective cover 3 is connected to the rear protective cover using the front mounting hole 13, it becomes a protective cover for a mower. When this mower protective cover is attached to the mower, the rotary blade of the mower and the periphery of the rotary blade can be seen from the gaps between the plurality of horizontal protective plates 18 provided in the rake shape of the front protective cover 3. This can be done while checking the work.
[0024]
In addition, each of the horizontal protection plates 18 having a bowl shape has a flat portion disposed in parallel to the base 11 and has a large area covering the rotary blade, so that more pebbles and the like can be prevented from being scattered. The front protective cover 3 provided with the horizontal protection plate 18 has a small gap between the horizontal protection plates, and is suitable for removing grass with low height or thin grass.
Therefore, if the front protective cover made up of the vertical protection plate and horizontal protection plate shown in FIG. 1 is prepared, it can be selected according to the type and state of the grass to be mowing. Therefore, the work efficiency can be freely improved.
[0025]
Next, a modified example of the fixture will be described with reference to FIG.
FIG. 4 (a) is a side view when the protective cover for mower according to the present embodiment is attached to a shaft with a large mounting angle, and FIG. 4 (b) is a shaft with a small mounting angle for the protective cover for mower. It is a side view at the time of mounting | wearing.
4A and 4B, the fixture 5 is provided with an angle adjusting joint 19. Since the angle adjusting joint 19 is pivotally provided by the pin 20 on the lower mounting plate 8 side and the pin 21 on the base 9 side, the angle can be changed widely with the pin 20 and the pin 21 as axes. Therefore, it can be mounted on a mower with a large shaft mounting angle θ as shown in FIG. 4A or a mower with a small shaft mounting angle θ as shown in FIG. 4B.
Even if the angle adjustment joint 19 is not installed as described above, the rear protective cover 2 can be mounted on a mower having a different shaft attachment angle θ. However, by providing the angle adjustment joint 19, a wider shaft attachment can be achieved. It can correspond to the angle θ.
[0026]
In the mower protective cover 1 configured as described above, the rear protective cover 2 protects the operator's feet from the rotary blade during mowing, and can prevent scattering of pebbles and the like repelled by the rotary blade. . Further, the front protective cover 3 prevents scattering of pebbles and the like by the rotary blade, and the vertical protective plate 12 or the horizontal protective plate 18 provided in a rake shape improves the visibility at the rotary blade 17 and its surroundings, Accidents can be avoided in the work on dangerous soils.
Further, since the front protective cover 3 is detachable from the rear protective cover 2, the front protective cover 3 provided with the vertical protective plate 12 or the front protective cover 3 provided with the horizontal protective plate 18 is selected. By exchanging, efficient work can be performed according to the plant height.
The rear protective cover 2 can be easily attached to the mower with the fixture 5, and the fixture 5 is designed to be adjustable with respect to the mounting angle of the shaft. Yes.
[0027]
Finally, an embodiment of the mower according to the present invention will be described with reference to FIG. (Corresponding to claim 3 )
FIG. 5 is an outline view of the mower according to the present embodiment.
In FIG. 5, the mower 22 has the mower protective cover 1 covering the rotary blade 17 and attached to the shaft 14 by the fixture 5. A handle 23 is installed above the shaft 14, and a motor 24 for rotating the rotary blade 17 is connected to the end of the shaft 14.
Although not shown, the operator suspends the mower 22 from the shoulder with a strap or the like, grasps the handle 23, operates the motor 24, and performs the mowing work by rotating the rotary blade 17. The protective cover for the mower 1 is mounted, the rear protective cover 2 protects the operator from damage caused by the rotary blade and the scattering of pebbles and the like, and the front protective cover 3 prevents the pebbles and the like from scattering to the surroundings. In addition, since the visibility is ensured by the front protective cover 3, the worker can proceed with work safely. Furthermore, when the front protective cover 3 is detachably provided, it can be selected depending on the type and state of the grass to be cut, and a variation that can improve work efficiency can be provided.
[0028]
【The invention's effect】
As described above, the protective cover for a mower according to claim 1 of the present invention secures the safety of the operator's feet by the first protective part, and the operator's visual recognition by the second protective part. And safety to the surroundings.
The fixing portion provided in the first protection portion facilitates the mounting to the mower, and can also be mounted to a mower having a different mounting angle of the shaft portion.
[0029]
Moreover, in the protective cover for mowers of Claim 2 of this invention, since it has a rake-like protective part over the perimeter of the rotary blade of a mower, especially on suppressing scattering of pebbles etc. , Visibility becomes good.
[0031]
Finally, in the mower according to claim 3 of the present invention, the protective cover for mower according to claim 1 or 2 is attached, so that the operator and the surroundings are protected by the protective cover for mower. In addition, the operator can secure the visibility and perform the mowing work safely.
[Brief description of the drawings]
FIG. 1 is an external view of a protective cover for a mower according to an embodiment of the present invention.
FIG. 2A is a top view when the mower protective cover according to the present embodiment is attached to the mower, and FIG. 2B is the same when the mower protective cover is attached to the mower. It is a side view.
FIG. 3 is an external view of a modified example of the front protective cover of the mower protective cover according to the present embodiment.
FIG. 4A is a side view when the protective cover for a mower according to the present embodiment is attached to a shaft with a large attachment angle, and FIG. 4B is the same for the protective cover for a mower with a small attachment angle. It is a side view at the time of attaching to a shaft.
FIG. 5 is an external view of a mower according to the present embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Protective cover for mowers 2 ... Rear protective cover 3 ... Front protective cover 4 ... Half disk 5 ... Fixing device 6 ... Rear mounting hole 7 ... Upper mounting plate 8 ... Lower mounting plate 9 ... Base 10 ... Pin 11 ... Substrate DESCRIPTION OF SYMBOLS 12 ... Vertical type protective plate 13 ... Front part mounting hole 14 ... Shaft 15 ... Bolt 16 ... Bolt 17 ... Rotary blade 18 ... Horizontal type protective plate 19 ... Angle adjustment joint 20 ... Pin 21 ... Pin 22 ... Mower 23 ... Handle 24 ... Motor θ ... Shaft mounting angle

Claims (3)

A protective cover for a mower having a circular rotary blade and a shaft portion obliquely provided on the rotary blade, wherein the rotary blade is provided over a substantially semicircular circumference on the side where the shaft portion is obliquely provided. A first protective part, and a second protective part provided in the first protective part and covered in a rake shape over the remaining substantially semicircular circumference, wherein the first protective part comprises: A fixing portion capable of gripping the shaft portion; and the fixing portion includes a pair of mounting plates capable of sandwiching the shaft portion, and a base for connecting one of the mounting plates and the first protection portion. A protective cover for a mower, comprising an angle adjusting joint between one of the mounting plates and the pedestal , wherein the angle adjusting joints are pivotally provided on one of the mounting plates and the pedestal, respectively. . A protective cover for a mower provided with a circular rotary blade and a shaft portion obliquely installed on the rotary blade, the protective cover having a protective portion covered in a rake shape on the rotary blade, the protective portion including the shaft A fixing portion capable of gripping a portion, and the fixing portion includes a pair of mounting plates capable of sandwiching the shaft portion, a pedestal for connecting one of the mounting plates and the protection portion, and the mounting plate An angle adjustment joint is provided between one side and the pedestal, and the angle adjustment joint is pivotally provided on one of the mounting plate and the pedestal, respectively . A protective cover for a mower according to claim 1 or claim 2 , a rotary blade covered by the protective cover for a mower, a shaft portion whose one end is obliquely provided on the rotary blade, and the shaft portion And a power unit of a rotary blade provided at the other end.

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