JP2011115150A - Scatter-preventing cover for bush cutter and bush cutter equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scatter-preventing cover for a bush cutter, keeping most suitable posture corresponding to conditions of working space, decreasing no workability and capable of securing safety of the operator; and to provide a bush cutter equipped with the cover. <P>SOLUTION: There is provided a scatter-preventing cover for a bush cutter, attached near a cutting part of a bush cutter having a cutting part driven to rotate and attached to at the tip end of an operation rod, wherein, the scatter-preventing cover for a bush cutter has a protecting part protecting against at least scattering matters flying to the rear by rotation force of the cutting part, and the protecting part is set freely swingable in the front and rear direction of the operation rod or vertically movable in the crossing direction with respect to the longitudinal direction of the operation rod. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a shatterproof cover for a brush cutter, and more particularly to a shatterproof cover for protecting an operator from scattered matter such as grass and pebbles during a mowing operation using a brush cutter, which further adversely affects the operability of the brush cutter. The present invention relates to an anti-scattering cover for a brush cutter and a brush cutter having the same.

  There are roughly two types of current brush cutters: one that cuts the grass by rotating a disk-shaped cutting blade with a blade, and one that cuts grass by rotating a resin cord (cutter cord) such as nylon (registered trademark). Things are prevalent. With such a brush cutter, when cutting the grass, the cutting blade and the resin cutter cord are rotated at a high speed, so that the foreign matter such as the roots and leaves of plants, stones, gravel, glass, etc. are sprung up during the work. There is also. The jumped foreign matter hits the operator's eyes, face, shin, etc., and therefore, when performing a mowing operation using a conventional brush cutter, it was always next to danger.

  Therefore, in order to solve such a problem, in Patent Document 1 (Registered Utility Model No. 3011310), grass, pebbles, soil, etc. cut by attaching a sheet of rubber or the like to the guard end of the cutter portion of the brush cutter. It has been proposed to prevent the scattering of.

  Further, in Patent Document 2 (Japanese Patent Application Laid-Open No. 10-94314), in a brush cutter in which pebbles and the like are prevented from flying with a protective plate, the clearance between the ground and the lower edge of the protective plate generated by the height difference of the operator. In order to prevent foreign objects from flying from, a brush cutter with a protective part composed of a plurality of flexible members, and a brush cutter provided with a position adjusting means capable of adjusting the vertical position of the protective part. A protective cover was proposed.

Registered Utility Model No. 3011310 Japanese Patent Laid-Open No. 10-94314

  However, the conventionally provided shatter prevention cover for a brush cutter or the safety cover for a brush cutter is attached to the main shaft (operating rod) and can be moved away from or closer to the cutting blade or cutter cord. The angle cannot be adjusted.

  In this regard, in Patent Document 2, the vertical position of the protective unit can be adjusted. However, the protective unit whose vertical position is adjusted is fixed in a state in which the movement is prevented, and depending on the state of the work place. It is not something that can be changed and dealt with freely.

  And if you consider the actual mowing work place, there are naturally narrow places such as unevenness of the ground, inclination in the front and rear, left and right direction, and various structures such as roots and fences of plants, and when working at these places In this case, the bottom of the anti-scattering (protection) cover comes into contact, and the workability is remarkably reduced. On the other hand, in order to eliminate such a decrease in workability, a scattering prevention (protection) cover was also installed at a position away from the cutting blade or cutter cord. Clearance occurred between the bottom and the ground, and safety could not be ensured.

  Therefore, in the present invention, an anti-scattering cover for a brush cutter that maintains an optimum posture according to the situation of the work place, does not deteriorate workability, and can ensure the safety of the operator, and a cutting machine including the same. Providing a payment machine is the first issue.

  Further, when formed of a flexible material such as a resin like a conventional brush cutter cover, the cutting blade depends on the movement of the cutting portion (ie, cutting blade and cutter cord) in the brush cutter. It is also conceivable that the anti-scattering cover is cut by being caught in the cutter cord.

  Therefore, in the present invention, a scattering prevention cover for a brush cutter that can maintain an optimum posture according to the situation of the work place but is not cut by a cutting blade or a cutter cord, and a brush cutter including the same. Providing is the second issue.

  As a result of earnest research, the present inventors have found that the posture of the brush cutter shatterproof cover can be freely changed according to the situation of the work place, so that at least one of the above problems can be solved, The present invention has been completed.

  That is, according to the present invention, there is a scattering prevention cover for a brush cutter provided in the vicinity of the brush cutter of a brush cutter having a rotary driving brush cutter provided at the tip of the operating rod, and at least by the rotational force of the brush cutter. It has a protective part that protects the scattered objects that scatter backward, and the protective part can be swung in the front-rear direction of the operating rod or can be moved up and down in the direction intersecting the length direction of the operating rod. A scattering prevention cover for a brush cutter is provided.

  In such a brush cutter shatterproof cover, the protective part that hangs down below the operation rod is formed so as to be swingable or vertically movable. Therefore, the operation rod is laid down regardless of the existence of the brush cutter. Can be lowered.

  In the present invention, in order to solve any of the above-mentioned problems, the brush cutter anti-scattering cover includes at least a protection unit that protects the scattered matter scattered backward by the rotational force of the brush cutting unit. Is provided so as to be swingable in the front-rear direction so as to hang down on the operation rod, and further provided with a stopper for restricting the swinging of the protective portion toward the cutting blade side. I will provide a.

  In such a brush cutter, the presence of the stopper restricts the swinging of the operating rod in the lengthwise direction of the brush cutter to a fixed length, so even when the operating rod in the brush cutter is laid down to a low posture, The anti-scattering cover for the brush cutter does not become an obstacle.

  The anti-scattering cover for a brush cutter according to the present invention is generally formed with a fixing portion for fixing the protection portion to the operating rod of the brush cutter. This fixing part may be one that holds the protective part so as to be swingable up and down, but preferably the protective part is slidable in the width direction and / or is movable up and down. To form.

  If the protection part is slidably held in the width direction, the protection plate does not limit the movement of the brushing part in the left-right direction during the brushing operation. That is, when performing the brushing work with the brush cutter, the brush cutter performs the brush cutting while swinging the brush driving portion that rotates at the tip side to the left and right. When trimming on the side, there is a possibility that the movement of the brushing part may be restricted. Therefore, if the protective part is formed to be slidable in the width direction, the work as if the protective part does not exist. Can be realized.

  In addition, when providing the said protection part slidably to the left-right direction, it is desirable to comprise so that it may urge to presence in a desired position with elastic members, such as the said protection part spring. For example, when the same force is applied to the protective part in the left-right direction with the fixed part as the center, a restoring force is generated in any elastic member, so that the protective part can be held at the center. By providing such an elastic member, it is possible to quickly restore the original position by the elastic force even when the protective portion is pressed against either one of the left and right directions in the brushing operation.

  Further, if the fixing part is formed so as to hold the protection part so as to be movable up and down, the protection part itself is swung, that is, the lower end side of the fixing part is swung. The amount of movement in the vertical direction can be adjusted. Thereby, it is possible to follow the change of the unevenness of the brushing surface more reliably.

  Further, the fixing portion according to the present invention can hold the width end portion of the protective plate so as to be swingable up and down around the fixing portion. That is, the protection part can be swung in the direction of rotation around the axis of the operating rod. As a result, when the cutting surface is inclined, the protective portion can be tilted so as to follow the inclined surface, so that the cutting blade portion can be moved as the operator desires. Become.

  In order to solve at least one of the above-mentioned problems, the present invention is a brush cutter in which a brush driving unit that is rotationally driven is provided at the tip of the operating rod, and the cutting tool according to the present invention is provided in the vicinity of the brush cutting unit. There is provided a brush cutter provided with a scattering prevention cover for a brush cutter.

  Such a brush cutter uses the above-described anti-scattering cover for the brush cutter according to the present invention, so that it is possible to prevent scattering of grass, pebbles, soil, and the like that have been cut during the work, and to further sway the protective part. Since it is configured to be movable or movable up and down, the protection unit can always protrude below the horizontal position of the brush cutting unit. As a result, the clearance between the work surface and the protective plate can be eliminated, and scattering of pebbles and the like can be reliably prevented. Furthermore, by forming the protection part so that it can swing or move up and down, even when the operation rod is laid down and the brush cutter is placed in a low posture, this protection plate does not become an obstacle. Even in narrow work such as between various structures such as fences, the cutting blade can be inserted without any problems.

  The cutting blade portion in the present invention may be a disk-shaped cutting blade with a blade or a cutter cord made of a resin string, and any material such as metal or resin may be used as long as the protective plate can maintain a certain shape. Absent. The requirement to maintain a certain shape here is that if it is a flexible material such as a sheet or a film, it will be bent toward the cutting blade and will be cut off. This is also possible.

  In the anti-scattering cover for a brush cutter according to the present invention, the mounting method or structure of the protective plate is not limited as long as the protective plate is swingable or vertically movable.

The principal part expansion perspective view which shows the brush cutter which installed the anti-scattering cover for brush cutters concerning this Embodiment The side view which shows the brush cutter which installed the anti-scattering cover for brush cutters concerning other embodiment Front side main part cross-sectional perspective view showing the brush cutter provided with the anti-scattering cover for the brush cutter shown in FIG. Cross-sectional view of main parts showing the operating state of the brush cutter using the anti-scattering cover for the brush cutter according to the present embodiment Exploded perspective view of main parts showing another fixing structure of the brush cutter anti-scatter cover Side sectional view showing the main part of a conventional brush cutter shatterproof cover Schematic showing an example of using a conventional anti-scattering cover for a brush cutter Schematic sectional view showing another embodiment of the fixing structure Side view of essential part showing another embodiment of fixing structure The perspective view which shows other embodiment of a fixing structure

  Below, the anti-scattering cover for brush cutters according to the present invention and the brush cutter using the same will be described based on the embodiments shown in the drawings.

  First, in order to explain the technical significance of a brush cutter shatterproof cover according to the present invention, the configuration of a conventional brush cutter shatterproof cover is shown in FIGS. In the embodiment shown in FIG. 6, the protection plate 50 is installed immediately behind the cutting blade portion 20. Specifically, the operating rod 10 is installed so as to hang downward. However, since the protection plate 50 is provided so as to be movable in the length direction of the operation rod 10, it can be slid to the rear of the operation rod 10 as shown by a chain line in FIG. . In the brush cutter anti-scattering cover formed in this way, the protective plate 50 can block the horizontal extension line of the cutting blade portion 20 in a state where the protective plate 50 is installed in the vicinity of the cutting blade portion 20. When the protective plate 50 is slid to the rear of the operating rod 10 (a chain line in FIG. 6), the protective plate 50 cannot block the horizontal extension line of the cutting blade portion 20, and a distance L between them. Clearance will occur. Due to this clearance, pebbles and the like that bounced off during the cutting operation hit the worker, which is not preferable for safety.

  In order to eliminate such a problem, it is not necessary to create such a clearance. For example, as shown in FIG. 7, there is a structure above the work surface and the work is performed in a narrow space in the vertical direction. If the protective plate 50 is installed in the vicinity of the cutting blade portion 20, the protective plate 50 becomes an obstacle, and the cutting blade portion 20 cannot be advanced to the back of the space (FIG. 7A). Therefore, in order to solve the problem at the time of such work, as shown by a chain line in FIG. 6, the protection plate 50 is shifted behind the operation rod 10. That is, as shown in FIG. 7B, the cutting blade portion 20 cannot enter the space unless the protection plate 50 is shifted behind the operation rod 10.

  That is, with the conventional anti-scattering cover for a brush cutter, securing safety and improving workability have been problems that cannot be solved simultaneously.

  On the other hand, the brush cutter cover shown in the present embodiment has a protective plate 30 that is swingable as shown in FIG. That is, the brush cutter shatterproof cover is provided in a swingable manner in the vicinity of the cutting blade portion 20 existing at the tip of the brush cutter.

  The brush cutter is provided with a drive unit (not shown) such as a small engine on the rear end side of the operation rod 10, and the power of the drive unit is driven by a shaft or the like in the operation rod 10 and the cutting blade portion 20 at the tip of the operation rod 10. Thus, the cutting blade portion 20 at the tip portion is rotationally driven to cut grass and the like. Further, the brush cutter scattering prevention cover according to the present embodiment is provided in the vicinity of the cutting blade portion 20 of the operating rod 10 in the brush cutter.

  In this embodiment, the brush cutter shatterproof cover includes a fixed portion 31 fixed to the operating rod 10 and a protective plate 30 provided to be swingable with respect to the fixed portion 31. The protective plate 30 is formed so as to cover a part of the peripheral edge of the cutting blade portion 20, particularly the worker side, and is formed so as to block at least the horizontal surface of the cutting blade portion 20 on the operation rod 10 side. In particular, when the cutting blade portion 20 is counterclockwise, the protection plate 30 can be provided longer on the left side.

  In this embodiment, the brush cutter shatterproof cover is fixed by sandwiching the operating rod 10 with the fixing portion 31, but if the clamped state is released, it slides in the length direction of the operating rod 10. Can be fixed, and can be fixed at an arbitrary position.

  In addition, as shown in FIGS. 2 and 3, the protective plate 30 is formed by connecting the two plates up and down, or the operation rod 10 is suspended. It is also possible to provide a stopper 32 for preventing swinging of the protective plate 30 to the cutting blade portion 20 side.

  In particular, in the anti-scattering cover for a brush cutter shown in FIG. 2, the protective plate 30 is formed by connecting two protective plates 30 that are curved along the outer periphery of the cutting blade portion 20 so as to be swingable. ing. Specifically, the first protective plate 30a is provided on the operating rod 10 side, and the second protective plate 30b is provided below the first protective plate 30a so that the protective plate 30 can be bent freely at the joint between the two using a hinge structure or the like. Forming.

  The stopper 32 is for preventing the protection plate 30 from swinging toward the cutting blade portion 20, and may be formed as a support portion that is fixed to the protection plate 30 and swings together with the protection plate 30, for example. it can. In the stopper 32 formed in this way, the movement of the support portion is suppressed by the operating rod 10 due to the swinging of the protection plate 30, and the swing range of the protection plate 30 can be restricted. That is, in the stopper 32, the support portion hits the upper peripheral surface of the operating rod 10 due to the weight of the protective plate 30 that always hangs down, and the protective plate 30 is prevented from rotating toward the cutting blade.

  Next, the swing range of the protective plate 30 regulated by the stopper 32 will be described with reference to FIG. First, the internal angle between the operating rod 10 at the rotation center (fulcrum) of the protection plate 30 and the vertically lower side is θ1, the internal angle between the operation rod 10 and the first protection plate 30a at the rotation center is θ2, and the rotation center and the protection plate When the inner angle of the cutting blade portion 20 side formed by the line connecting the contact point 30 and the operating rod 10 is θ3, θ2 and θ3 must be larger than θ1, and preferably θ3 is θ2 It is formed so as to be larger. If each angle is set in this way, when the operating rod 10 is biased downward, it can always be rotated to the rear side (opposite to the cutting blade portion 20) of the operating rod 10, thereby The risk of the protective plate 30 hitting the cutting blade portion 20 can be eliminated. The angle at which the protective plate 30 can swing is not particularly limited in the direction opposite to the cutting blade portion 20, but it is desirable that the protective plate 30 can swing to the extent that it is approximately parallel to the rotation surface of the cutting blade portion. .

  When using the brushing cutter scattering prevention cover configured as described above, it is used by being fixed near the cutting blade portion of the brush cutter as described above. The installation position of the brush cutter anti-scattering cover depends on the height of the protective plate 30, but the protective plate 30 exists at a position about 5 to 7 cm away from the outer peripheral edge when the cutting blade portion 20 rotates. It is desirable to do.

  When using a brush cutter provided with such a shatterproof cover for a brush cutter, as shown in FIG. 4A, when the operation rod 10 is laid down, the protective plate 30 falls down following this. Therefore, the protective plate 30 and, consequently, the shatterproof cover for the brush cutter do not become an obstacle when operating the brush cutter. And since the protection plate 30 can fall down in this way, as shown in FIG. 4 (B), even when there is a structure or the like on the work surface and the work is performed in a place where the vertical height is low, Since the brush cutter can be inserted in a laid state, the work can be proceeded without any resistance.

  In addition to the structure shown in FIGS. 1 to 4 above, the structure for fixing the anti-scattering cover for the brush cutter adopts a structure in which the gap generated in the protective plate 30 during the fixing becomes smaller as shown in FIG. can do. Specifically, the fixed portion 31 is composed of a curved portion 31a sandwiching the operating rod 10 and a strip-shaped portion 31b extending downward from the curved portion 31a, and the guard plate 30 is screwed to the strip-shaped portion 31b of the fixed portion 31. A mounting portion 31c that is swingably mounted by 31d or the like is formed. Then, the brush cutter anti-scatter cover can be attached to the operating rod 10 by engaging the attachment portion 31c of the protection plate 30 and the belt-like portion 31b of the fixing portion 31 with a screw 31d or the like.

  In the brush cutter anti-scatter cover formed in this way, the upper end of the protection plate 30 can be formed above the operation rod 10, and the gap generated in that case is reduced to about the diameter of the operation rod 10. be able to.

  Further, FIG. 8 shows still another fixing structure of the brush cutter scattering prevention cover, and the brush cutter scattering prevention cover is formed with a fixing portion for fixing the protective plate to the operation rod 10. . The fixing portion 31 includes an operation rod side member 40 that holds the operation rod 10 and a protection plate side member 50 that is pivotally attached below the operation rod side member and integrated with the upper end of the protection plate 30. Has been.

  In this embodiment, the operating rod side member 40 includes an upper member 41 and a lower member 42 that sandwich the operating rod 10 in the vertical direction, and both of them are screwed by a screw or the like at the flange portion, It is detachably connected by a locking structure or the like. The lower member 42 has a curved surface that holds the lower surface of the operating rod 10, but is formed in a substantially “T” shape as a whole. On the side surface of the leg portion 43 protruding downward in the operating rod, A concave portion 44 into which the shaft member 52 included in the protection plate side member 50 is inserted is provided (see FIG. 9). On the other hand, the protection plate side member 50 includes a base portion 51 provided at the upper end of the protection plate 30 and a shaft member 52 extending between the base portions, and the shaft member 52 is disposed in the concave portion 44 described above. The two are integrated. The depth of the concave portion 44 and the length of the shaft member 52 may be appropriately set in consideration of the movable range of the protective plate 30 in the left-right direction. However, it is desirable that the movable range of the protective plate 30 in the left-right direction is about 6 to 10 mm. When moving beyond 10 mm, the gap between the protection plate 30 and the leg portion 43 becomes large, and there is a possibility of flying pebbles or the like. This is because it cannot be obtained sufficiently.

  Further, it is desirable that the concave portion 44 formed in the leg portion 43 of the protection plate side member 50 is formed to have a size that allows at least the shaft member 52 to move arbitrarily within the concave portion 44. By enlarging the concave portion 44 (increasing the bottom area), the shaft portion 43 can be freely moved, and as a result, the posture of the protective plate can be made free. As a result, the positional relationship between the protective plate and the operating rod is adjusted to the center as shown in FIG. 8 (A), biased to either one as shown in (B), or as shown in (C). It can also be inclined in the vertical direction. Further, the protective plate 30 can be freely moved upward as shown in FIG. 9A or the protective plate 30 can be moved downward as shown in FIG. 9B. Furthermore, by holding the protective plate 30 with such a structure, as shown in FIG. 10, the protective plate can be swung in the horizontal direction (horizontal rotation direction) around the fixed portion. When the protective plate 30 is moved up and down by the fixing portion 31, the movement width in the vertical direction is preferably about 10 to 30 mm. However, it can also be formed to move 30 mm or more depending on the situation of the work place.

  According to the brush cutter having the brush cutter anti-scattering cover configured as described above, it is possible to perform work in a narrow place without problems while ensuring the safety of the operator.

  In addition, regarding the structure of the protection plate 30, as shown in FIG. 2, the first protection plate 30a and the second protection plate 30b are formed, and the first protection plate 30a is shaken with respect to the operating rod 10. The second protective plate 30b may be fixed so as not to move, and can be swingably provided with respect to the first protective plate 30a.

  By using the anti-scattering cover for a brush cutter according to the present invention, it is possible to increase the efficiency of the brush cutting work. Further, since the anti-scattering cover for a brush cutter that provides an advantageous effect is provided, the manufacturer of the brush cutter or its parts and accessories can also provide a new product.

DESCRIPTION OF SYMBOLS 10 Operating rod 20 Cutting blade part 30 Protection board 30a First protection board 30b Second protection board 31 Fixing part 31a Curved part 31b Strip part 31c Attachment part 31d Screw 32 Stopper

Claims (4)

Scatter prevention cover for a brush cutter provided in the vicinity of the brush cutter of the brush cutter having a rotary driving brush cutter provided at the tip of the operating rod, and scattered matter scattered backward at least by the rotational force of the brush cutter Equipped with a protective part to protect
An anti-scattering cover for a brush cutter, wherein the protective part is swingable in the front-rear direction of the operating rod or is vertically movable in a direction crossing the length direction of the operating rod. Scatter prevention cover for a brush cutter provided in the vicinity of the brush cutter of the brush cutter having a rotary driving brush cutter provided at the tip of the operating rod, and scattered matter scattered backward at least by the rotational force of the brush cutter Equipped with a protective part to protect
The protective part is provided so as to be swingable in the front-rear direction so as to hang down on the operation rod.
Furthermore, a scattering prevention cover for a brush cutter, further comprising a stopper for restricting the swinging of the protective part toward the cutting blade part.
Furthermore, it has a fixing part that fixes the protective part against the operating rod of the brush cutter,
The fixing part holds the protection part so as to be slidable in the width direction, movable up and down, or swingable around an axis of an operating rod to which the fixing part is attached. The scattering prevention cover for brush cutters as described in 2.
A brush cutter provided with a rotary driving brush cutter at the tip of the operating rod,
A brush cutter comprising the brush cutter scattering prevention cover according to any one of claims 1 to 3 in the vicinity of the brush cutter.

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