JP3149947U - Brush cutter - Google Patents

Abstract

The present invention provides a brush cutter capable of securely fixing a scattering protection cover for a brush cutter to a predetermined position of the column without damaging the outer periphery of the column. An object of the present invention is to provide a clamping member 9 for detachably attaching a brush protection device 8 to a support 2 and a fixing member 10 fixed to the brush protection device 8 and the fixing member. 10 has a column holding member 11 provided with a pair of V-shaped fitting recesses 17A and 18A for holding the column 2 and the pair of V-shaped fitting recesses 17A of the column holding member 11 This can be achieved by sandwiching and fixing the support 2 between 18A to attach the brush cutter scattering protection cover 8 to the support 2. [Selection] Figure 3

Description

  The present invention relates to a brush cutter suitable for cutting grass and the like grown on the ground.

  Conventionally, as a brush cutter, a long column (handle), a cylindrical transmission mechanism storage body (base) provided on the distal end side of the column, and a cutter rotatably provided on the cylindrical transmission mechanism storage unit A member (mowing blade), a drive source for rotationally driving the cutter member, and a drive device (drive engine) provided on the rear end side of the column, and the column to swing the column to the left and right A grip handle provided on the support post, a shoulder band provided on the support column, and a brush cutter shatter protection cover (guard) attached to the support column are known (see, for example, Patent Document 1).

  Further, the scattering protection cover for a brush cutter has a shape in which at least a side portion on the rotational direction side of the brush cutter blade is bent downward, as viewed from the operator who operates the brush cutter. And a guard plate made of a hard resin material attached to the column so that at least half of the rotational direction of the brush blade is hidden in the main body plate, and suspended from the rear end of the guard plate and inserted through the column There has been known one constituted by a soft sheet made of a soft resin material in which an insertion portion to be formed is formed (for example, see Patent Document 1).

JP 2004-65193 A

  However, the brush cutter described in the above Japanese Patent Application Laid-Open No. 2004-65193 has the following problems.

(1) Scatter protection cover for brush cutter is attached to the support column by configuring the mounting bracket from two semicircular mounting pieces and sandwiching the support column with these two semicircular mounting pieces. Therefore, it can be attached only to the brush cutter where the outer diameter of the column matches the inner diameter of the semicircular mounting piece. Therefore, a plurality of brush cutters having different outer diameters of the struts cannot be used as a single brush cutter protective cover.

(2) Scatter protection cover for brush cutters has a rigid resin guard plate and a soft resin soft sheet fixed with a metal strip and a plurality of screws, and an insertion hole through which the prop is inserted into the soft sheet. Since it is configured to form, it requires two types of parts, a guard plate and a soft sheet, of different materials, and it is necessary to fix the guard plate and the soft sheet with a metal strip and a plurality of screws As a result, the production time was long and the assembly time was long.

(3) Since the scattering protection cover for the brush cutter is provided with a concave notch in the center of the front end of the soft sheet fixed to the rear end of the guard plate, this concave notch is used as an insertion hole for inserting the strut When removing the scattering protection cover for the brush cutter from the column, the mounting bracket is divided into two parts, and the guard plate and the soft sheet are separated, or the cylindrical transmission mechanism storage body ( It is necessary to separate the base) and the cutter member from the support column, and remove the scattering protection cover for the brush cutter from the brush cutter in use and use the scattering protection cover for the brush cutter attached to another brush cutter. I couldn't do it easily. For this reason, it is difficult to use a single brush cutter cover for multiple brush cutters, and if there are multiple brush cutters, each brush cutter has a dedicated brush cutter protection. It was necessary to prepare a cover. In addition, a brush cutter (user of the brush cutter) passes through the insertion hole made of a concave notch provided in the center of the front end of the soft sheet through the scattered material such as grass and stones scattered from the cutter member side.・ Operators etc.) When hitting the body, the body could be damaged.

(4) Since the bent portions are only formed on both ends of the guard plate and not on the front end portion and the rear end portion of the guard plate, it is sufficient when the guard plate is made of synthetic resin. A strong protective cover for brush cutters was not obtained.

(5) During the mowing operation, when the soft sheet fixed to the rear end of the guard plate comes into contact with the ground and is pushed downward, the soft sheet may be bent and deformed. In this case, since the gap between the soft sheet and the ground remains large, scattered objects such as grass and stones flying from the cutter member side pass through the gap, The lower body could be hit and damaged.

(6) The guard plate is mounted so that the tilt angle of the guard plate relative to the mounting bracket (the angle between the inner surface of the guard plate and the upper surface of the column) is an acute angle. As a result, the duster's splash protection cover becomes heavier and the physical fatigue of the operator operating the brush cutter increases, resulting in a longer brush cutting time and a large amount on the inner surface of the guard plate. When stuck, it was necessary to remove the stuck grass from the inner surface of the guard plate by interrupting the mowing work, and the workability of the mowing was poor.

(7) Scatter protection cover for brush cutter is attached to the column so that it is inclined to the rotation direction side of the brush cutter blade by the mounting bracket attached to the column, and at least the rotation direction side of the brush cutter blade in the guard plate In order to hide half of the blade, it is provided so as to be tiltable with respect to the mounting bracket. Therefore, if the inclination angle of the cutting blade toward the rotation direction is changed, the tilt angle of the guard plate with respect to the mounting bracket (guard Since adjustment work to change the angle between the inner surface of the plate and the upper surface of the support column is necessary, the adjustment work is complicated and the handling property is poor.

  The object of the invention of claim 1 was made in view of the above-mentioned problem (1), and it was possible to firmly attach the scattering protective cover for the brush cutter to the support, and to provide one scattering protective cover for the brush cutter. It is an object of the present invention to provide a brush cutter that can be used in combination with other brush cutters having different outer diameters of struts.

  The object of the invention of claim 2 is made in view of the above problems (1) to (3), and the object is scattered so as to be in a state suitable for the height of the brush cutter operator of the brush cutter. It is an object of the present invention to provide a brush cutter which can be easily attached to a support cover and has excellent usability and safety.

  The object of the invention of claim 3 was made in view of the above problems (1) to (5), and the object is to provide a brush cutter having excellent usability and safety.

  The purpose of the invention of claim 4 was made in view of the above problems (1) to (6), and the purpose of the brush cutter is that grasses do not stick to the inner surface of the splash protection cover in large quantities. Is to provide.

  The object of the invention of claim 5 is made in view of the above problems (1) to (7), and the object is substantially perpendicular to the longitudinal direction of the support column and the longitudinal direction of the support column. It is an object of the present invention to provide a brush cutter that can easily adjust the position in both directions.

  In order to achieve the object of the invention of claim 1, a long column, a cylindrical transmission mechanism storage body provided on the tip side of the column, and a cutter rotatably provided in the cylindrical transmission mechanism storage unit A member, a drive device that is a drive source for rotationally driving the cutter member and provided on the rear end side of the column, a grip handle provided on the column to swing the column to the left and right, and the handle In a brush cutter provided with at least a scattering protection cover provided between the cutter member and a detachable attachment means for detachably attaching the scattering protection cover to the support column, the clamping means is used for the brush cutter scattering. A support member fixed to the protective cover; and a support member holding member provided with a pair of V-shaped fitting recesses for holding the support member, and the support member holding member. By clamping fixing the strut between the pair of V-shaped fitting recess, is characterized in that a configuration of attaching the bush cutter for scattering protection cover on the post.

  Furthermore, in order to achieve the object of the invention of claim 2, the attachment position of the brush protection cover for the brush cutter to the support is set in both directions, that is, the longitudinal direction of the support and the longitudinal direction of the support. It is characterized in that it is configured to be adjustable.

  Furthermore, in order to achieve the object of the invention of claim 3, an upper flat plate portion that extends upward and one side from the support column in a state where the support column for the brush cutter is clamped by the holding means. A lower flat plate portion extending downward and on both sides of the support column in a state where the support column is clamped by the clamping means, and the support column is provided on the upper side of the upper flat plate portion. An upper upper side bent piece portion that is bent toward the distal end side of the upper flat plate portion, an upper side bent piece portion that is provided on one side of the upper flat plate portion and bent toward the distal end side of the column, and A lower lower side bent piece provided on the lower side of the lower flat plate part and bent toward the front end side of the column; and a lower lower side bent piece provided on both sides of the lower flat plate unit and bent toward the front side of the column. Lower side folding It has at least composed of a bent piece and is characterized in.

  Furthermore, in order to achieve the object of the invention of claim 4, the upper flat plate portion and the lower flat plate are obtained by holding the strut by the holding means and fixing the scattering protection cover for the brush cutter to the strut. The portion extends in a direction substantially perpendicular to the longitudinal center line of the column, and the other side edge of the upper flat plate portion is outward from the outer circumferential surface of the column in the longitudinal direction. Without projecting, the side closer to the other side edge of the upper planar plate portion of the side surfaces of the lower planar plate portion is projected outward from the outer peripheral surface in the longitudinal direction of the column. It is characterized by having a configuration in a state.

  Furthermore, in order to achieve the object of the invention of claim 5, the fixing member is an L-shaped fixing tool having an L-shaped cross section, and the L-shaped fixing tool is fixed to a scattering protection cover for a brush cutter. A reinforcing plate that serves as a reinforcing member, a first fastener for fixing the reinforcing plate and the L-shaped fixing tool to the splash protection cover for the brush cutter, and a slidably attaching the column holding member to the L-shaped fixing tool And at least a second fastener for fixing the mounting frame to the L-shaped fixture, and the mounting frame is provided with a column holding member approximately in the longitudinal direction of the column. A sliding groove is provided to enable sliding in a right angle direction, and the support member is sandwiched between a holding frame member having a V-shaped fitting recess and a V-shaped fitting recess. The plate member, the fitting recess of the holding frame member, and the fitting recess of the holding plate member In this state, the clamping plate member is attached to the clamping frame member, and at least two clamping fasteners for slidably attaching the clamping plate member and the clamping frame member to the mounting frame body It is characterized by having a configuration provided.

  According to the first aspect of the present invention, the clamping means for detachably attaching the brush cutter scattering protection cover to the support column is fixed to the brush cutter scattering protection cover and the fastening member provided on the fixing member. The V-shaped fitting concave portion and the V-shaped fitting concave portion are sandwiched between the fixing member-side V-shaped concave portion provided on the fixing member and the fastening member-side V-shaped concave portion provided on the fastening member. Since the strut 2 is supported at four points, and the distance between the sandwiching frame member and the sandwiching plate member can be adjusted according to the outer diameter of the strut, the outer diameter of the strut of the brush cutter is different in size. The strut can be firmly clamped between the clamping frame member and the clamping plate member, and a single brush cutter protective cover is shared by a plurality of brush cutters having different outer diameters of the columns. A brush cutter is obtained that makes it possible.

  Furthermore, according to the invention of claim 2, the attachment position of the brush protection cover for the brush cutter to the support column can be adjusted in the longitudinal direction of the support column and in the direction substantially perpendicular to the longitudinal direction of the support column. Since it is configured, it can be easily attached to the strut of the brush protection cover for the brush cutter so that it is suitable for the height of the brush cutter's height, and it has excellent usability and safety. A brush cutter is obtained.

  Further, according to the invention of claim 3, the upper flat plate portion, the upper upper bent portion provided on the upper side of the upper flat plate portion and bent toward the tip end side of the support column, and the upper flat plate By using the upper side side bent piece provided on one side of the part and bent toward the tip side of the support column, while using the brush cutter, toward the upper body side of the brush cutter operator of the brush cutter, Grass and stones scattered from the cutter member through the upper side of the column are blocked, and at least the lower plane plate part and the lower side of the lower plane plate unit are provided on the lower side of the column. The lower lower side bent piece portion that is bent toward the distal end side, and the lower side side bent piece portion that is provided on both sides of the lower flat plate portion and is bent toward the distal end side of the support column. During use, mowing the brush cutter Towards the lower body side of the worker, grass, stones, etc. scattered from the cutter member through the lower side of the support block the scattered matter. All the wearing items, such as hats, clothing, gloves, work shoes, etc., that are worn over the area, do not collide with flying objects such as grasses, stones, etc. The soup will not adhere to the wearer's wear and will contaminate or damage the wear, and the scattered objects such as stones will be removed from the body of the brusher, such as the head, face, Since it hits a body such as a limb and does not damage the body, a brush cutter with excellent usability and safety can be obtained.

  Furthermore, according to the invention of claim 4, when the V-shaped concave portion on the fixing member side is fitted to the column, the upper plane plate portion and the lower plane plate portion are located with respect to the longitudinal center line of the column. It becomes a state extending in a substantially right angle direction, so that grass does not stick to the inner surfaces of the upper flat plate portion and the lower flat plate portion in large quantities, and the mowing operation is interrupted to stop the upper flat plate portion and The work of removing the grass stuck from the inner surface of the lower flat plate portion becomes unnecessary, and in the state where the fixing member side V-shaped concave portion is fitted to the column, the other side edge of the upper flat plate portion is The side that is closer to the other side edge of the upper flat plate part than the other side edge of the lower flat plate part without protruding outward from the outer peripheral surface in the longitudinal direction of the support pillar. Since it is configured to protrude outward from the outer peripheral surface of the longitudinal direction of the grass, A brush cutter is obtained that does not stick to the inner surfaces of the upper and lower flat plate portions in large quantities, and that does not require the operation of interrupting the brush cutting operation and removing it from the inner surface of the scattering protective cover for the brush cutter. .

  Further, according to the invention of claim 5, the fixing member is provided with an attachment frame body for slidably attaching the column holding member to the L-shaped fixing member fixed to the scattering protection cover for the brush cutter, and the attachment frame. The body is provided with a sliding groove for allowing the column holding member to slide in a direction substantially perpendicular to the longitudinal direction of the column, and the column holding member is provided with a V-shaped fitting of the holding frame member. The sandwiching plate member is attached to the sandwiching frame member in a state where the fitting recess and the V-shaped fitting recess of the sandwiching plate member are opposed to each other, and the sandwiching plate member and the sandwiching frame member are used as attachment frames. Since the structure is movably attached, the brush cutter can be easily adjusted with respect to the support column for the brush cutter in the longitudinal direction of the support column and in the direction substantially perpendicular to the longitudinal direction of the support column.

It is a whole side view showing a brush cutter concerning one embodiment of the present invention. It is a principal part top view which abbreviate | omits the support | pillar rear side of the brush cutter concerning one Embodiment of this invention. It is a principal part front view which abbreviate | omits the support | pillar rear side of the brush cutter concerning one Embodiment of this invention. It is an expanded principal part sectional drawing which shows the clamping means which clamps and fixes the scattering protection cover for brush cutters concerning one Embodiment of this invention to a support | pillar. [BRIEF DESCRIPTION OF THE DRAWINGS] It is a front view of the scattering protection cover for brush cutters concerning one Embodiment of this invention. It is a top view of the scattering protection cover for a brush cutter according to an embodiment of the present invention. It is a bottom view of the scattering protection cover for a brush cutter according to an embodiment of the present invention. It is a left view of the scattering protection cover for a brush cutter according to an embodiment of the present invention. It is a right view of the scattering protection cover for brush cutters concerning one Embodiment of this invention. It is a side view which shows the state which attached the support | pillar clamping member to the fixing member which comprises the clamping means concerning one Embodiment of this invention. It is an enlarged top view which shows the attachment frame body of the fixing member concerning one Embodiment of this invention. It is an expansion perspective view which shows the whole structure of the support | pillar clamping member which comprises the clamping means concerning one Embodiment of this invention. It is an enlarged top view of the clamping plate member of the support | pillar clamping member concerning one Embodiment of this invention. It is an expansion perspective view which shows the state which fractured | ruptured the principal part of the frame member for clamping of the support | pillar clamping member concerning one Embodiment of this invention. It is an expansion perspective view for demonstrating the state which attached the support | pillar clamping member to the fixing member of the clamping means concerning one Embodiment of this invention. It is a figure explaining the dimension of the scattering protection cover for brush cutters concerning one Embodiment of this invention. It is an expansion perspective view which shows the whole structure of the support | pillar clamping member concerning the example 1 of other embodiment of this invention. It is an expansion perspective view which shows the whole structure of the support | pillar clamping member concerning the example 2 of other embodiments of this invention. It is the expansion perspective view seen from the front side which shows the whole structure of the scattering protection cover for brush cutters concerning the example 3 of other embodiments of this invention. It is the expansion perspective view seen from the back side which shows the whole structure of the scattering protection cover for brush cutters concerning the example 3 of other embodiments of this invention.

Mode for carrying out the invention

  Hereinafter, embodiments of the present invention will be specifically described with reference to FIGS.

  A brush cutter 1 according to an embodiment shown in FIG. 1 has a long column 2, a cylindrical transmission mechanism housing 3 provided on the distal end side of the column 2, and the cylindrical transmission mechanism housing 3 can be rotated. A cutter member 4 provided on the column 2, a drive device 5 provided on the rear end side of the column 2 as a drive source for rotationally driving the cutter member 4, and a grip provided on the column 2 for swinging the column 2 left and right A handle 6, a shoulder band 7 attached to a portion of the column 2 positioned between the grip handle 6 and the drive device 5, and a brush cutter detachably attached between the cutter member 4 and the grip handle 6. The scattering protection cover 8 for use is provided at least.

  The support column 2 is made of an elongated tubular body having a reduced diameter such as stainless steel or aluminum having a diameter of about 25 mm and a length of about 160 cm. The front end (tip) of the support column 2 is integrally provided on the outer peripheral side surface of the cylindrical transmission mechanism housing 3. The cutter member 4 is accommodated in the cylindrical transmission mechanism by the rotational force of the driving device 5 that is transmitted through an elongated transmission shaft (not shown) provided in the column 2 and a transmission gear group (not shown) provided in the transmission mechanism housing 3. The lower surface portion of the body 3 is rotated at a high speed.

  As shown in FIG. 1, the cutter member 4 that rotates at a high speed on the lower surface portion of the cylindrical transmission mechanism housing 3 has a crossing angle between the longitudinal center axis X <b> 1 of the transmission mechanism housing 3 and the rotation surface X <b> 2 of the cutter member 4. It is installed so that R1 is substantially perpendicular. As shown in FIG. 1, the front end (tip) of the support column 2 has an intersection angle R <b> 2 between the extension line of the center line X <b> 3 in the longitudinal direction of the support column 2 and the extension surface of the rotation surface X <b> 2 of the cutter member 4. Thus, it is integrally provided on the outer peripheral side surface of the cylindrical transmission mechanism housing 3. The rotation direction of the cutter member 4 is set to rotate in the direction of the arrow P1 shown in FIG. 2, that is, counterclockwise when the cutter member 4 is viewed from above. The cutter member 4 may be a wire method using nylon wire or the like, or may be a metal disk method having a saw blade on the outer periphery. However, in this embodiment, as the wire method, the transmission mechanism housing 3 The length of the cutter member 4 is set so that the distance dimension L6 from the vertical center axis X1 to the tip of the cutter member 4 is about 230 mm.

  The drive device 5 is composed of a two-cycle engine, and is fixed to the rear end side of the column 2 so that it can be replaced. The grip handle 6 is made of stainless steel, aluminum or the like, and the brush cutter 1 of the brush cutter 1 uses both hands while the shoulder band 7 is hung on the shoulder of the brush cutter 1 of the brush cutter 1. The support 2 is shaped so that it can be smoothly swung from side to side. The shoulder band 7 is made of cloth or leather, and is provided at a position suitable for supporting the driving device 5 provided on the rear end side of the column 2 by suspending the column 2 on the shoulder of the brush cutter operator of the brush cutter 1. It has been.

  The brush cutter scattering protection cover 8 is detachably attached to the support column 2 by the clamping means 9, and the attachment position to the support column 2 is substantially in the longitudinal direction of the support column 2 and the longitudinal direction of the support column 2. It is designed to be adjustable in both directions at right angles. The clamping means 9 is comprised from the fixing member 10 fixed to the scattering protection cover 8 side for brush cutters, and the support | pillar clamping member 11 provided in this fixing member 10 (refer FIGS. 2-4). In a state where the brush cutter scattering protection cover 8 is attached to the support 2, the brush cutter scattering protection cover 8 is arranged so that the tip of the rotating cutter member 4 does not contact the brush cutter scattering protection cover 8. The attachment position to the column 2 is set.

  As shown in FIG. 3 and FIG. 5, the brush cutter protective cover 8 includes an upper flat plate portion 8 </ b> A that extends upward and one side from the support 2 in a state where the support 2 is held by the holding means 9. Provided on the lower flat plate portion 8B which is continuous with the upper flat plate portion 8A and extends downward and on both sides of the support column 2 with the holding means 9 held between the upper flat plate portion 8A and the upper side 8A-1 of the upper flat plate portion 8A. The upper side bent piece 8C that is bent toward the tip end side of the support column 2 and the upper side that is provided on one side 8A-2 of the upper flat plate portion 8A and bent toward the tip end side of the support column 2 Side bent piece 8D, lower lower bent piece 8E provided on the lower side 8B-1 of the lower flat plate portion 8B and bent toward the tip side of the column 2, and both sides 8B- of the lower flat plate portion 8B 2, 8B-3, on the tip side of the column 2 The lower side plate bent portions 8F and 8G that are bent in the past, and the lower flat plate portion 8B that protrudes outward from the outer peripheral surface in the longitudinal direction of the support column 2 in a state where the support column 2 is held by the holding means 9. It consists of a lower upper side bent piece portion 8H provided on the upper side 8B-4 portion and bent toward the tip end side of the support column 2, and includes an upper flat plate portion 8A, a lower flat plate portion 8B, an upper upper side bent piece portion 8C, and an upper portion. The side bent piece 8D, the lower lower bent piece 8E, the lower bent side pieces 8F and 8G, and the lower upper bent piece 8H are integrally formed of synthetic resin.

  As shown in FIG. 1, when the brush cutter scattering protection cover 8 is fixed to the column 2 by clamping the column 2 with the clamping means 9, the upper plane plate portion 8 </ b> A and the lower plane plate are arranged. The portion 8B extends in a direction substantially perpendicular to the longitudinal center line X3 of the column 2 and, as shown in FIG. 3, the other side edge 8A-3 of the upper flat plate portion 8A is Without projecting outward from the outer peripheral surface of the support column 2 and close to the other side edge 8A-3 of the upper flat plate portion 8A among the side sides 8B-2 and 8B-3 of the lower flat plate portion 8B. The side 8 </ b> B- 3 is protruded outward from the outer peripheral surface of the support 2.

  The brush cutter scattering protection cover 8 fixes the fixing member 10 of the clamping means 9 along the vicinity of the edge of the other side edge 8A-3 of the upper flat plate portion 8A, and a pair of supporter clamping members 11 In a state where the support column 2 is sandwiched and fixed between the fitting recesses 17A and 18A, the gap dimension G between the other side edge 8A-3 of the upper flat plate portion 8A and the outer peripheral surface of the support column 2 is within 5 mm. The configuration is set (see FIGS. 3 and 4).

  As shown in FIGS. 3 and 5, the brush protection cover 8 includes a corner outer peripheral wall 8K-1 and a lower lower bent piece between a lower lower bent piece 8E and a lower side bent piece 8F. Scatter protection for a brush cutter by rotating the column 2 around the corner outer peripheral wall 8K-2 between the portion 8E and the lower side bent piece 8G about the longitudinal center line X3 of the column 2 as a rotation axis When the cover 8 is rotated about the center line X3 in the longitudinal direction of the support column 2 as a rotation axis, the cover 8 is a rotatable shape portion for smoothly performing the rotation. The pivotable shape portion includes a corner outer peripheral wall 8K-1 between the lower lower side bent piece 8E and the lower side bent piece 8F, and between the lower lower bent piece 8E and the lower side bent piece 8G. The corner outer peripheral wall 8K-2 is formed as an inclined surface. In the present embodiment example, the corner outer peripheral wall 8K-1 and the corner outer peripheral wall 8K-2 are inclined surfaces having an inclination angle within a range of about 30 degrees to about 45 degrees, thereby enabling a rotatable shape part. Is formed.

  As shown in FIG. 4, the fixing member 10 serves to reinforce the L-shaped fixing device 12 having an L-shaped cross section and the L-shaped fixing device 12 to be fixed to the scattering protection cover 8 for a brush cutter. A reinforcing plate 13, a plurality of first fasteners 14 made up of fixing bolts and washers for fixing the reinforcing plate 13 and the L-shaped fixing device 12 to the scattering protection cover 8 for a brush cutter, and an L-shaped fixing device 12 At least from a plurality of second fasteners 16 comprising a mounting frame 15 for slidably mounting the column holding member 11 and a fixing bolt and a washer for fixing the mounting frame 15 to the L-shaped fixture 12. Composed. As shown in FIG. 11, the mounting frame 15 includes a sliding groove 15 </ b> A for allowing the column holding member 11 to slide in a direction substantially perpendicular to the longitudinal direction of the column 2, and a second fastener 16. Two attachment holes 15B for second fasteners for attachment are provided. The attachment frame 15 is made of a material that is as light and strong as possible.

  The second fastener 16 can function as a drop-off preventing member that prevents the column holding member 11 fitted in the slide groove 15A from dropping out of the slide groove 15A. For this purpose, the length dimension of the fixing bolt of the second fastener 16 is such that the screw rod 20 of the column holding member 11 slides in the sliding groove 15A of the mounting frame 15 to the left and right ends of the sliding groove 15A. When moved, the retaining head 20A provided at the rear end of the screw rod 20 is locked (collised) with the tip of the fixing bolt of the second fastener 16, and the screw rod 20 of the column holding member 11 is moved. Are set to dimensions that allow the sliding frame 15A of the mounting frame 15 to be prevented from falling off (removing from) the left and right ends (see FIGS. 4 and 15).

  As shown in FIG. 10, the column holding member 11 includes a holding frame member 17 having a V-shaped fitting recess 17A, a holding plate member 18 having a V-shaped fitting recess 18A, and a holding frame. The clamping plate member 18 is attached to the clamping frame member 17 with the fitting recess 17A of the member 17 and the fitting recess 18A of the clamping plate member 18 facing each other, and the clamping plate member 18 and the clamping frame member 17 is composed of two clamping fasteners 19 for slidably mounting the mounting frame 17 on the mounting frame 15, and includes a fitting recess 17A of the clamping frame member 17 and a fitting recess 18A of the clamping plate member 18. By sandwiching the column 2 between them, the brush cutter scattering protection cover 8 is attached to the column 2 (see FIG. 3). As shown in FIG. 3, the holding frame member 17 of the support pinching member 11 is a holding frame member that is located outward from the other side edge 8 </ b> A- 3 of the upper flat plate portion 8 </ b> A of the brush cutter scattering protection cover 8. The fixing recess 10 is mounted on the mounting frame 15 so that the 17 fitting recesses 17A are positioned.

  As shown in FIGS. 10 and 12, the two clamping fasteners 19 include a metal screw rod 20 provided with a head 20 </ b> A for retaining at the rear end, and a tip end side of the screw rod 20. It consists of a metal butterfly nut-like nut body 21 to be screwed and a metal anti-rotation member 22 fitted to the rear end side of the screw rod 20, and the nut body 21 is screwed by a human finger or a tool. By moving the clamping plate member 18 to the clamping frame member 17 side, the column 2 is placed between the fitting recess 17A of the clamping frame member 17 and the fitting recess 18A of the clamping plate member 18. It is configured such that it can be clamped manually without using a tool. The outer diameter of the screw rod 20 is set to a size that allows the sliding groove 15A of the attachment frame 15 to slide. The length of the sliding groove 15 </ b> A of the attachment frame 15 is set to a dimension that allows the support holding member 11 to slide with respect to the attachment frame 15 in a range of about 40 mm to about 60 mm. The attachment position of the mounting frame 15 to the rising one side 12A of the L-shaped fixture 12 and the height dimension of the rising one side 12A of the L-shaped fixing device 12 are such that the wing nut-shaped nut body 21 of the clamping fastener 19 is When picking and screwing with a finger, the nut body 21 can be screwed without the finger or the like coming into contact with the back surface side of the upper flat plate portion 8A of the brush cutter scattering protection cover 8. Set to dimensions.

  The brush cutter scattering protective cover 8 according to the embodiment is made of synthetic resin from the viewpoint of weight reduction and manufacturability. That is, using the upper and lower molds, the upper flat plate portion 8A, the lower flat plate portion 8B, the upper upper side bent piece portion 8C, the upper side bent piece portion 8D, the lower lower bent piece portion 8E, and the lower side bent piece portion. 8F, G and the lower upper side bent piece 8H are integrally formed of synthetic resin. Further, in order to increase the strength of the brush protection cover 8 for the brush cutter, a wire mesh may be integrally attached to the back side of the brush protection cover 8 for the brush cutter, and the brush protection cover 8 of the brush cutter In order to prevent adhesion of garbage such as grass on the front side (inner side), a slipping agent such as silicon may be applied to the front side (inner side) of the scattering protection cover 8 for the brush cutter.

  The L-shaped fixture 12 of the fixing member 10 is made of a material that is as light and strong as possible, and is parallel to the other side end 8A-3 of the upper flat plate portion 8A of the brush protection cover 8 for the brush cutter. In this way, the upper flat plate portion 8A is fixed to the back side by the first fastener 14. The reinforcing plate 13 of the fixing member 10 is made of a material that is as light and strong as possible, and is fixed to the front side of the upper flat plate portion 8A by the first fastener 14 so as to face the L-shaped fixture 12.

  The sandwiching frame member 17 of the support sandwiching member 11 is made of a material that is as light and strong as possible, and has an elongated box shape as shown in FIG. Between the joint recess 17A, the two upper surface through holes 17B through which the screw rod 20 passes, the two lower surface through holes 17C through which the screw rod 20 passes, and between the upper surface through hole 17B and the lower surface through hole 17C, The cylindrical reinforcing body 17D is provided at a position where the screw rod 20 penetrating the upper surface through hole 17B and the lower surface through hole 17C can be fitted. The cylindrical reinforcement body 17D is configured to move the clamping plate member 18 toward the clamping frame member 17 side by screwing the nut body 21, thereby clamping the fitting recess 17A of the clamping frame member 17 with the fitting recess 17A. When the support column 2 is clamped between the fitting recesses 18A of the plate member 18, the clamping frame member 17 is prevented from being deformed.

  The clamping plate member 18 of the column holding member 11 is made of an elongated steel plate, and as shown in FIGS. 12 and 13, a V-shaped fitting recess 18 </ b> A for holding the column 2 and one screw rod 20. Is provided with an upper surface through hole 18B through which the screw thread 20 penetrates and an opening 18C into which the other screw rod 20 is engaged. As shown in FIG. 12, the clamping plate member 18 has an opening 18C for cutting, as shown in FIG. 12, by rotating the clamping plate member 18 in one direction around one screw rod 20 passing through the upper surface through hole 18B. Is engaged with the other screw rod 20, and the other screw rod is rotated by rotating the clamping plate member 18 around the one screw rod 20 penetrating the upper surface through hole 18B. The opening 18C cut from 20 is configured to be released.

  As shown in FIG. 10, the nut body 21 screwed from the tip of the screw rod 20 is prevented from coming out of the tip of the screw rod 20 at the tip of the screw rod 20 constituting the clamping fastener 19. A split pin 23 is provided. As shown in FIG. 12, the anti-rotation member 22 that constitutes the clamping fastener 19 has a rectangular plate shape, and is positioned above the head 20 </ b> A of the screw rod 20, so that the nut body 21 is screwed. When the clamping plate member 18 is moved to the clamping frame member 17 side, the rotation of the anti-rotation member 22 is prevented by the attachment frame body 15, thereby preventing the screw rod 20 from rotating. It has a function (see FIG. 15).

  A rubber sheet for preventing the outer peripheral surface of the support column 2 from being damaged when the support column 2 is held in the engagement recess portion 17A of the holding frame member 17 and the engagement recess portion 18A of the holding plate member 18. An elastic material for preventing damage is provided, and the edges of the fitting recess 17A and the fitting recess 18A are trimmed (chamfered).

  As shown in FIG. 16, the brush cutter protective cover 8 has a vertical width L1 from the uppermost end of the upper upper bent piece 8 </ b> C to the lower end of the lower lower bent piece 8 </ b> E so that the lower upper bent piece is about 320 mm. The vertical width dimension L2 from the uppermost end of the portion 8H to the lowermost end of the lower lower bent piece 8E is about 120 mm, and the horizontal width from the outermost periphery of the lower side bent piece 8F to the outermost periphery of the lower side bent piece 8G The dimension L3 is set to about 350 mm, the horizontal width dimension L4 at the uppermost end of the upper upper side bent piece 8C is set to about 250 mm, and the horizontal width L5 at the uppermost end of the lower upper side bent piece 8H is set to about 100 mm. Moreover, the brushing cutter scattering protective cover 8 has the inclined surfaces of the corner outer peripheral wall 8K1 and the corner outer peripheral wall 8K2 in a range of about 30 degrees to about 45 degrees with respect to the lowermost end surface of the lower lower bent piece 8E. The upper upper side bent piece 8C, the upper side bent piece 8D, the lower lower bent piece 8E, the lower side bent piece 8F, 8G and the lower upper bent piece 8H It is formed so as to be bent at an angle of about 45 degrees with respect to 8A and the lower flat plate portion 8B.

  Next, an example of a procedure for attaching the brush cutter scattering protection cover 8 to the brush cutter 1 according to the above-described embodiment will be specifically described.

  First, as shown in FIG. 12, the support frame member 17 is assembled by assembling the holding frame member 17, the holding plate member 18, the two screw rods 20, the two nut bodies 21, and the two anti-rotation members 22. Eleven parts are completed in advance. In this case, the lower end through hole 17C and the upper surface through hole 17B of the screw rod 20 in the state in which the anti-rotation member 22 is fitted are directed from the lower surface through hole 17C of the holding frame member 17 toward the upper surface through hole 17B. , The clamping plate member 18 and the nut body 21 are attached to the screw rod 20 in this order from the tip end side of the screw rod 20, and then a split pin 23 for preventing the screw rod is attached to the tip portion of the screw rod 20. It is good to complete the assembly of the support | pillar clamping member 11 by fixing.

  Next, the sliding provided on the attachment frame 15 of the fixing member 10 in which the two screw rods 20 constituting the assembly of the column holding member 11 are fixed in advance to the scattering protection cover 8 for the brush cutter. The support | pillar clamping member 11 is mounted | worn with the fixing member 10 by making it fit into the groove | channel 15A from the edge part of the sliding groove | channel 15A. In this case, the screw rod 20 is fitted into the sliding groove 15A so that the rotation preventing member 22 is positioned below the sliding groove 15A of the attachment frame 15. The fixing member 10 fixed in advance to the brush cutter scattering protection cover 8 is parallel to the other side 8A-3 of the upper flat plate portion 8A of the brush cutter scattering protection cover 8. Further, on the rising side 12A of the L-shaped fixture 12 fixed in advance by the first fastener 14 on the back side of the upper flat plate portion 8A, the surface side (inner bottom) facing the sliding groove 15A of the mounting frame 15 ) May be performed by fastening the attachment frame 15 with the second fastener 16 (see FIG. 4).

  Next, the clamping plate member 18 is rotated in the other direction around the one screw rod 20 passing through the upper surface through hole 18B, so that the opening 18C cut from the other screw rod 20 is released. After that, the support column 2 is installed between the fitting recess 17A of the clamping frame member 17 and the fitting recess 18A of the clamping plate member 18, and then the clamping plate member 18 passes through the upper surface through hole 18B. The opening 18C to be cut is locked to the other screw rod 20 by rotating in one direction around the one screw rod 20 (see FIG. 12).

  Thereafter, the position of the sandwiching frame member 17 and the sandwiching plate member 18 in the longitudinal direction of the column 2 is adjusted by moving the brush protection cover 8 in the longitudinal direction of the column 2 and two screw rods. 20 is slid in the sliding groove 15A to adjust the positions of the sandwiching frame member 17 and the sandwiching plate member 18 in a direction substantially perpendicular to the longitudinal direction of the support column 2, thereby The attachment position of the brush cutter scattering protection cover 8 is adjusted so as to be an optimum position suitable for the height of the brush cutter operator.

  Finally, the nut body 21 is grasped with a finger or rotated by a tool, the nut body 21 is screwed, and the sandwiching plate member 18 is moved toward the sandwiching frame member 17 side, thereby holding the nut body 21. The mounting operation is completed by sandwiching the column 2 between the fitting recess 17A of the frame member 17 and the fitting recess 18A of the clamping plate member 18 (see FIG. 3).

  In addition, after the attachment to the brush cutter 1 is completed, when it is desired to finely adjust the attachment position of the brush protection cover 8 for the brush cutter in the longitudinal direction to the support column 2, the nut body 21 is loosened to hold the support column 2 in the longitudinal direction. After finely adjusting the positions of the frame member 17 and the clamping plate member 18, the nut body 21 may be tightened again. Further, after the attachment to the brush cutter 1 is completed, when it is desired to finely adjust the positions of the holding frame member 17 and the holding plate member 18 in a direction substantially perpendicular to the longitudinal direction of the support column 2, the nut body 21 is loosened. After the two screw rods 20 are slid to the desired position in the sliding groove 15A, the nut body 21 may be tightened again.

  Next, an example of how to cut grass and the like by the brush cutter 1 having the above configuration will be specifically described.

(A) When performing a brushing operation on grass or the like having a short length and a thin trunk grown on a wide ground, the brush cutter is in a state where the rotational surface X2 of the cutter member 4 is substantially parallel to the ground. With the lower end of the lower lower side bent piece 8E of the scattering protection cover 8 lightly pressed against the ground, the handle 6 is rotated while the handle 6 is gripped, and the column 2 is swung left and right. Short and high-growth grass that grows on the ground can be cut efficiently and safely. In this case, since the other side edge 8A-3 of the upper flat plate portion 8A of the scattering protective cover 8 for the brush cutter has a shape that does not protrude outward from the outer circumferential surface of the column 2 in the longitudinal direction, It is easy to see the outer periphery of the tip of the rotating cutter member 4 during the operation, and it is easy to adjust the inclination angle of the cutter member 4 according to the unevenness of the ground and the way of growing the grass. For example, it is possible to efficiently perform the mowing work. Further, if the lower support plate bending portion 8E of the lower flat plate portion 8B is lightly pressed against the ground, the support column 2 is rotated by the grip handle 6 about the longitudinal center line X3 of the support column 2 as a rotation axis. It is possible to perform grass cutting work without causing the tip of the cutter member 4 to bite into the ground.

(B) When cutting a long, thick stem or other grass that grows on a large ground, the longitudinal center line X3 of the column 2 is rotated by the grip handle 6 while the cutter member 4 is rotated. By rotating as a shaft and tilting the brush cutter shatter protection cover 8 toward the counter-rotation direction side of the cutter member 4 (opposite to the direction of the arrow P1 in FIG. 2), it is on the extension line of the rotation surface X2 of the cutter member 4 The roots (borders) such as thick grasses are located. In that case, the other side edge 8A-3 of the upper flat plate portion 8A of the scattering protective cover 8 for the brush cutter has a shape that does not protrude outward from the outer peripheral surface in the longitudinal direction of the support column 2. During the operation, the positional relationship between the outer periphery of the tip of the rotating cutter member 4 and the root of the grass and the like is easy to see, and therefore the root of the thick grass and the like can be efficiently cut off without difficulty.

(C) In the case of brushing the grass grown around a standing tree, the cutter member 4 is rotated and the grip handle 6 is used to rotate the center line in the longitudinal direction of the support column 2 as the rotation axis. The tip of the cutter member 4 is positioned away from the outer periphery of the standing tree so that the standing tree does not exist on the extended line of the rotation surface X2 of the cutter member 4 while tilting the scattering protection cover 8 toward the counter-rotation direction of the cutter member 4. . In that case, the other side edge 8A-3 of the upper flat plate portion 8A of the scattering protective cover 8 for the brush cutter has a shape that does not protrude outward from the outer peripheral surface in the longitudinal direction of the support column 2. During the operation, the positional relationship between the outer periphery of the tip of the rotating cutter member 4 and the root of the standing tree is easy to see, so that the grass growing around the standing tree can be efficiently cut without damaging the standing tree.

(D) In the case of cutting grass that grows along a curb or a concrete wall, the cutter member 4 is rotated, and the grip handle 6 is used to rotate the center line X3 in the longitudinal direction of the column 2 as a rotation axis. The tip of the cutter member 4 is moved so that there is no curb or concrete wall on the extension line of the rotation surface X2 of the cutter member 4 while the scattering protection cover 8 for the brush cutter is tilted to the anti-rotation direction side of the cutter member 4. Is a position away from the perimeter of the curb or concrete wall. In that case, the other side edge 8A-3 of the upper flat plate portion 8A of the scattering protective cover 8 for the brush cutter has a shape that does not protrude outward from the outer peripheral surface in the longitudinal direction of the support column 2. During the operation, the positional relationship between the outer periphery of the rotating cutter member 4 and the outer periphery of the curbstone or concrete wall is easy to see, so that the edge of the cutter member 4 is not damaged by contacting the curbstone or concrete wall with the curbstone. And grass that grows along concrete walls can be cut efficiently.

(E) In the case of cutting grass that grows along the corrugated plate installed in the paddy field, the longitudinal center line X3 of the column 2 is set by the grip handle 6 while the cutter member 4 is rotated. The cutter member 4 is rotated so that it does not exist on the extension line of the rotation surface X2 of the cutter member 4 while being rotated as a rotation shaft and tilting the brush cutter scattering protection cover 8 toward the counter-rotation direction side of the cutter member 4. By setting the tip of the plate away from the outer periphery of the wave plate, the grass growing along the wave plate can be efficiently cut without damaging the wave plate.

(F) In the case of grass cutting on the inclined surface, uneven surface or stepped portion of the ground, the center line X3 in the longitudinal direction of the support column is rotated by the grip handle while rotating the cutter member 4. By rotating the column around the shaft, the rotation surface X2 of the cutter member 4 is inclined in accordance with the inclined surface, uneven surface, or stepped portion on the ground, so that it grows on the inclined surface, uneven surface, stepped portion or the like of the ground. The grass can be cut efficiently.

(G) If the brush cutter 1 in use breaks down and it is necessary to use a spare brush cutter and the spare brush cutter does not have a brush protection cover for the brush cutter, the brush cutter in use It is only necessary that the brush protection cover 8 for the brush cutter installed in 1 is attached to the spare brush cutter for use. In that case, even if the outer diameter of the column 2 of the brush cutter 1 being used is different from the outer diameter of the column of the backup brush cutter, the fitting recess 17A of the clamping frame member 17 and the clamping plate member 18 Since both of the fitting recesses 18A are V-shaped, a spare brush cutter that is different from the outer diameter of the column 2 of the brush cutter 1 in use between the clamping frame member 17 and the clamping plate member 18. Can be firmly clamped, so that the brush cutter protective cover 8 is removed from the brush cutter 1 in use and the brush cutter protective cover 8 is spared. It can be used by attaching to a brush cutter.

  According to the brush cutter 1 of the one embodiment, the following effects (1) to (20) can be obtained.

(1) Since the fixing member 10 is fixed along the other side edge 8A-3 of the upper flat plate portion 8 of the brush protection cover 8 for the brush cutter, a column is attached to the mounting frame 15 of the fixing member 10. The holding frame member 17 of the holding member 11 can be easily attached, and the support column 2 is interposed between the holding frame member 17 and the holding plate member 18 of the support column holding member 11 attached to the mounting frame body 15. Since the support column 2 can be easily clamped by the support column holding member 11 by tightening the nut body 21 after the installation, the mounting operation of the support column holding member 11 to the scattering protection cover 8 for the brush cutter and the support column 2 are performed. Thus, it is possible to smoothly perform the operation of attaching the scattering protective cover 8 for the brush cutter.

(2) By using the upper flat plate portion 8A, the upper upper side bent piece portion 8C, and the upper side bent piece portion 8D, while using the brush cutter 1, toward the upper body side of the brush cutter, the cutter member 4 extends the column 2 Grass and stones scattered through the upper side are blocked, so wearings such as hats and outerwear that are worn on the upper body of the brush cutter during the brush cutting operation Grass and stones will not collide with wearing items such as gloves, and grass and grass juice will adhere to the wearer's wearing items to contaminate or damage the wearing items. In addition, scattered objects such as stones do not hit the body on the upper body side of the pruning operator, for example, the body such as the head, chest, and hand, and the body is not damaged.

(3) While using the brush cutter 1 by the lower flat plate portion 8B, the lower lower bent piece 8E, the lower side bent piece portions 8F and 8G, and the lower upper bent piece portion 8H, the brush cutter operator of the brush cutter 1 is in use. The grass, stones, etc. scattered from the cutter member through the lower side of the support column 2 are blocked from the scattered matter toward the lower body side of the cutter body. The attached items such as trousers and work shoes do not collide with scattered objects such as grass and stones, and grass and grass juice can be worn by the pruning worker. It does not adhere to contaminate or damage the wearing equipment, and scattered objects such as stones do not hit the body of a brush cutter, for example, a body such as a foot, thereby damaging the body. In particular, when the brushing operation is performed in a state where the lowermost lower end bent portion 8E of the brush cutter scattering protection cover 8 is lightly pressed against the ground, the lower lower side of the brush cutter scattering protection cover 8 is used. Since there is no gap between the bent piece 8E and the ground, while using the brush cutter 1, the stone, grass, grass juice, etc. facing the lower body side of the brush cutter operator of the brush cutter 1 Can be reliably prevented.

(4) The upper flat plate portion 8A and the lower portion are formed by the upper upper side bent piece 8C, the upper side bent piece 8D, the lower lower bent piece 8E, the lower side bent pieces 8F and 8G, and the lower upper bent piece 8H. Without increasing the size of the flat plate portion 8B, the scattering direction of the scattered matter scattered from the cutter member 4 can be changed to the tip side direction of the support column 2, and the upper flat plate portion 8A and the lower flat plate portion 8B can be changed. Since strength is achieved, a strong and miniaturized brush cutter protective cover 8 can be obtained.

(5) The upper flat plate portion 8A, the lower flat plate portion 8B, the upper upper side bent piece portion 8C, the upper side bent portion 8D, the lower lower bent piece 8E, and the lower side bent piece portions 8F, G are made of synthetic resin. As a result of integral molding, etc., it is possible to reduce the number of components and improve the manufacturability of the scattering protection cover 8 for a brush cutter.

(6) The clamping frame member 17 is attached to the mounting frame body so that the fitting recess 17A of the clamping frame member 17 protrudes outward from the other side edge 8A-3 of the upper flat plate portion 8A. 15, even if a gap is formed between the end surface of the other side edge 8A-3 of the upper flat plate portion 8A and the outer peripheral surface of the column 2, the gap dimension G of the gap is within about 5 mm. By setting to, scattered objects such as grasses and stones flying from the gap toward the upper body side of the brush cutter can be prevented.

(7) When the pair of fitting recesses 17 </ b> A and 18 </ b> A of the column holding member 11 are fitted to the column 2, the upper plane plate portion 8 </ b> A and the lower plane plate portion 8 </ b> B are moved with respect to the longitudinal center line X <b> 3 of the column 2. Since it extends in a substantially right-angle direction, most of the grass that has been scattered from the cutter member 4 and collided with the upper flat plate portion 8A and the lower flat plate portion 8B falls, and the grass is the upper flat plate. Since there is no large amount of sticking to the portion 8A and the lower flat plate portion 8B, the scatter protection cover 8 for the brush cutter becomes heavy during the brush cutting operation, and the workability is not deteriorated.

(8) When the pair of fitting recesses 17A and 18A of the column holding member 11 are fitted to the column 2, the other side of the upper plane plate portion 8A among the side sides 8B-2 and 8B-3 of the lower plane plate portion 8B. Since the side 8B-3 closer to the side edge 8A-3 protrudes outward from the outer peripheral surface in the longitudinal direction of the support column 2, the brush cutting is performed from the cutter member 4 through the lower side of the support column 2. The scattered matter such as grasses and stones scattered toward the lower body of the worker can be reliably blocked.

(9) Even if the shape of the other side edge 8A-3 of the upper flat plate portion 8A is not protruded outward from the outer peripheral surface in the longitudinal direction of the column 2, the cutter member 4 is passed through the upper side of the column 2. It was confirmed by experiments that it was possible to block the scattered matter such as grass and stones scattered toward the upper body side of the brush cutter. Therefore, the size of the upper flat plate portion 8A can be reduced by making the other side edge 8A-3 of the upper flat plate portion 8A not to protrude outward from the outer circumferential surface of the support column 2 in the longitudinal direction. Can do.

(10) When cutting grass growing on an inclined surface, uneven surface or stepped portion of the ground, or when cutting thick and hard grass from the root, the center line X3 in the longitudinal direction of the column 2 by the grip handle 6 It is necessary to tilt the rotation surface X2 of the cutter member 4 by rotating the support column 2 with the rotation axis as a rotation axis. The rotation is performed by lower lower side bent piece 8E and lower side bent piece on the lower flat plate portion 8B. Rotation formed by forming the corner outer peripheral wall 8K-1 between the portion 8F and the corner outer peripheral wall 8K-2 between the lower lower side bent piece 8E and the lower side bent piece 8G as an inclined surface. The shape can be smoothly performed by the possible shape portion, in other words, even if the column 2 is rotated about the center line X3 in the longitudinal direction of the column 2 by the grip handle 6, the lower portion of the lower flat plate portion 8B. Lower side bent piece 8E and Parts sides bent piece portion 8F, G is by its rotatable shaped portion, the inclined surface of the ground, without being caught in the uneven surface or the stepped portion or the like, the harder thick grass can be effortlessly cleaved from its root. In other words, when the support column 2 is rotated by the grip handle 6 about the longitudinal center line X3 of the support column 2, the lower lower side bent piece 8E and the lower side bent piece portion of the lower flat plate portion 8B. 8F and G are prevented from being caught by an inclined surface, an uneven surface, or a stepped portion of the ground by the rotatable shape portion so that the inclination angle of the rotation surface X2 of the cutter member 4 can be adjusted smoothly. Therefore, thick and hard grass can be cut from the root of the grass without difficulty.

(11) When cutting grass near the curb or concrete wall, contact the curb or concrete wall with the upper side bent piece 8D or the lower side bent piece 8F of the brush protection cover 8 for the brush cutter. It is also possible to carry out mowing work while In this case, the cutter member 4 is prevented from coming into contact with the curb or the concrete wall by the upper side bent piece 8D or the lower side bent piece 8F of the brush cutter protective cover 8; Without damaging the cutter member 4, the grass near the curb or the concrete wall can be cut off.

(12) When cutting the undergrowth in the vicinity of the standing tree, cut along the standing tree while the upper side bent piece 8D or the lower side bent piece 8F of the brush protection cover 8 is in contact with the standing tree. The mowing work can be performed while moving the dispenser 1. In this case, the cutter member 4 is prevented from coming into contact with the standing tree by the upper side bent piece 8D or the lower side bent piece 8F of the scattering protective cover 8 for the brush cutter. Undergrowth can be cut smoothly without damaging its standing trees.

(13) When a brush cutting operation is performed while lifting the brush cutter 1 on the bank of the bank slope, if the entire brush cutter 1 bounces upward, the lower part of the brush protection cover 8 for the brush cutter Since the lower bent piece 8E hits the foot of the brush cutter and prevents the cutter member 4 from coming into contact with the leg of the brush cutter, the leg or the like is not damaged by the cutter member 4.

(14) The nut body 21 is tightened or loosened with a finger of a brush cutter operator without using a tool, so that the brush cutter scattering protection cover 8 is attached to and detached from the column 2 and the brush cutter is protected against scattering. Adjustment of the attachment position to the support | pillar 2 of the cover 8 can be performed, and it is convenient.

(15) When the support column 2 is clamped between the clamping frame member 17 and the clamping plate member 18, the support column 2 is supported at four points by the V-shaped fitting recess 17A and the V-shaped fitting recess 18A. In addition, since the distance between the holding frame member 17 and the holding plate member 18 can be adjusted according to the outer diameter of the column 2, the column 2 can be adjusted even if the outer diameter of the column 2 of the brush cutter 1 is different. It can be firmly held between the holding frame member 17 and the holding plate member 18. Therefore, it is convenient to use one brush cutter protective cover 8 for a plurality of brush cutters having different outer diameters of the support columns, in other words, to be used as an attachment. In addition, since the damage prevention elastic material is provided in one or both of the fitting recess 17A and the fitting recess 18A, the holding force of the support column 2 by the holding frame member 17 and the holding plate member 18 is increased. The brush protection cover 8 can be securely fixed to a predetermined position of the support 2 without damaging the outer periphery of the support 2.

(16) The attachment position of the brush cutter scattering protective cover 8 to the support 2, that is, the attachment position in the longitudinal direction of the support 2 and the attachment position of the attachment position substantially perpendicular to the longitudinal direction of the support 2 Since it can be adjusted to the optimal position according to the height of the brush cutter, even if the height of the brush cutter is different, such as grass, stones etc. scattered towards the brush cutter It is possible to reliably block the scattered objects and to contaminate or damage the attachments of the brush cutter or damage the body of the brush cutter.

(17) The other side edge 8A-3 of the upper flat plate portion 8A of the brush protection cover 8 is not protruded outward from the outer circumferential surface of the column 2 in the longitudinal direction. Since the fitting recess 17A of the holding frame member 17 is positioned outward from the other side edge 8A-3, the V-shaped fitting recess 17A of the holding frame member 17 and the holding plate member 18 Between the V-shaped fitting recesses 18A, the work of sandwiching the support column 2 can be performed smoothly, and the operation of attaching the brush cutter shatter protection cover 8 to the support column 2 can be performed without difficulty, and the nut body 21 can be used. The holding plate member 18 is loosened and rotated around one screw rod 20 as an axis, so that the V-shaped fitting recess 17A of the holding frame member 17 and the holding plate member 18 are V-shaped. Can be released from between the fitting recesses 18 </ b> A of the bushing, and the scattering protection cover 8 for the brush cutter Detaching from tower 2 can also be carried out without difficulty.

(18) Even if the brush cutter scattering protection cover 8 is removed from the support 2, the support holding member 11 constituting the holding means 9 is separated from the fixed member 10 fixed to the brush cutter scattering protection cover 8. Therefore, the clamping means 9 can be stored and managed together with the brush cutter scattering protection cover 8, which is convenient. Further, the parts of the holding frame member 17, the holding plate member 18, and the holding fastener 19 that constitute the column holding member 11 from the fixing member 10 are not separated, and the parts are kept in an integrated state. Therefore, since the support | pillar clamping member 11 can be removed from the fixing member 10, or the support | pillar clamping member 11 can be attached from the fixing member 10 (it can make it detachable), handling property is excellent.

(19) Since the scattering protection cover 8 for the brush cutter has a shape such that the other side edge 8A-3 of the upper flat plate portion 8A does not protrude outward from the outer peripheral surface of the support column 2 in the longitudinal direction. During the paying operation, the cutter operator determines the positional relationship between the outer periphery of the tip of the cutter member 4 and the edge of the curb or concrete wall, the positional relationship with the root of grass, etc. Because it is easy to see, it can smoothly cut grass on the edge of curbstones and concrete walls, undergrowth around standing trees, or thick grass with trunks.

(20) During the operation of mounting the column holding member 11 to the fixing member 10, the two screw rods 20 of the column holding member 11 are fitted into the sliding grooves 15 </ b> A provided in the mounting frame 15 of the fixing member 10. After that, even if the slide groove 15A is moved, the second fastener 16 that also serves as a drop-off preventing member collides (locks) with the head portion 20A of the screw rod 20, whereby the screw of the column holding member 11 Since the rod 20 is prevented from coming out from the left and right ends of the sliding groove 15A of the attachment frame body 15, the work of attaching the column holding member 11 to the fixing member 10 can be performed smoothly.

  As described above, according to the above-described embodiment, the support 2 is firmly clamped between the fixing member 10 fixed to the brush cutter scattering protection cover 8 and the support holding member 11 provided on the fixing member 10. Thus, the brush cutter 1 that makes it possible to share a single brush cutter protective cover 8 with a plurality of other brush cutters having different outer diameters of the support column 2 can be provided.

  Furthermore, according to the one embodiment, the brush cutter scattering protection cover 8 can be easily attached to the support column 2 so as to be in a state suitable for the height of the brush cutter operator of the brush cutter 1. The brush cutter 1 with excellent usability and safety can be provided.

  Furthermore, according to the above-mentioned embodiment, the grass and the juice of the grass do not adhere to the wearer's wearer to contaminate or damage the wearer, and the scattered matter such as stones However, since it hits the body of the brush cutter, for example, the body such as the head and limbs, and does not damage the body, the brush cutter 1 having excellent usability and safety can be provided.

  Furthermore, according to the above-described embodiment, grass does not stick to the inner surface of the brush cutter dust protection cover 8 in a large amount, and the brush cutting operation is interrupted and removed from the inner surface of the brush cutter dust protection cover 8. The brush cutter 1 that does not require this work can be provided.

  Furthermore, according to the above embodiment, the attachment position of the brush protection cover 8 for the brush cutter can be easily adjusted in both the longitudinal direction of the support column 2 and the direction substantially perpendicular to the longitudinal direction of the support column 2. The brush cutter 1 can be provided.

  The brush cutter protective cover 8 of the above embodiment is made of synthetic resin (made of reinforced plastic) by molding, but is not limited thereto, and is made of stainless steel, aluminum or steel plate. Is also possible.

  The outer peripheral wall 8K-1 between the lower lower bent piece 8E and the lower side bent piece 8F and the lower lower bent piece 8E and the lower side bent of the splash protection cover 8 for the brush cutter according to the above embodiment. The corner outer peripheral wall 8K-2 between the one part 8G is formed as an inclined surface to form a rotatable shape part, but the present invention is not limited to this. The corner outer peripheral walls 8K-1 and 8K-2 may be arcuate surfaces to form a rotatable shape portion, or the lower lower side bent piece 8E and the corner outer peripheral wall 8K-1 may be formed. In addition, the overall shape of the corner outer peripheral wall 8K-2 may be a continuous gentle arc shape to form a rotatable shape portion.

  In the scattering protection cover 8 for a brush cutter according to the above-described embodiment, the fall-off prevention member that prevents the column holding member 11 fitted in the slide groove 15A from dropping out of the slide groove 15A is provided with the second fastener 16. However, it is not limited to this. The second fastener 16 does not have a structure that also serves as a drop-off preventing member, and is separate from the second fastener 16, for example, on the left and right end sides of the inner bottom facing the sliding groove 15 </ b> A of the mounting frame 15. Fallout prevention at a place constituted by a fixed fallout prevention screw rod and a fallout prevention fastener for fixing the fallout prevention screw rod to the inner bottom of the mounting frame 15 facing the sliding groove 15A. It is also possible to provide a member. When the fall prevention member is provided separately from the second fastener 16, the attachment frame 15 is attached to the rising one side 12 </ b> A of the L-shaped fixture 12 in the attachment procedure of the brush protection device 8. After the two fasteners 16 are attached in advance, the L-shaped fixture 12 can be fixed to the back side of the upper flat plate portion 8A by the first fastener 14.

  Although the nut body 21 that constitutes the clamping fastener 19 in the strut clamping member 11 of the above-described embodiment has a wing nut shape, it is not limited thereto. As in the clamping fastener 30 of the first embodiment shown in FIG. 17, the knob member 31 may be used instead of the nut body 21 of the above embodiment. In addition, the clamping fastener 30 of the first embodiment shown in FIG. 17 is a ring-shaped attachment member 32 fixed to the neck of a grip-type knob member 31 attached to the screw rod 20 instead of the split pin 23. In addition, by providing a connecting string 33 that connects the mounting plate member 32 and the clamping plate member 18, the knob member 31 is not lost when the knob member 31 is removed from the tip of the screw rod 20. The other structure is the same as the clamping fastener 19 in the support | pillar clamping member 11 of the said one Embodiment. In FIG. 17 showing the first example of another embodiment, the same reference numerals as those in FIG. 12 showing the one embodiment represent the same contents as those in FIG.

  A clamping fastener 40 according to the second embodiment shown in FIG. 18 has one end fixed to the upper surface of the head of the grip-type knob member 41 attached to the screw rod 20 and the other end clamped. By providing the connecting string 42 fixed to the plate member 18, when the knob member 41 is removed from the tip of the screw rod 20, the knob member 41 is not lost. It is the same as the clamping fastener 19 in the support | pillar clamping member 11 of embodiment. In addition, in FIG. 18 which shows the other example 2 of an embodiment, the same code | symbol as FIG. 12 which shows the said one Embodiment represents the same content as FIG. According to the clamping fastener 30 of the other embodiment example 1 and the clamping fastener 40 of the other embodiment example 2, the split pin 23 for preventing the removal is not necessary, and the tip of the screw rod 20 is not required. Therefore, it is not necessary to process a hole for fixing the split pin 23 for preventing the separation.

  The brush protection cover 80 for the brush cutter according to the third embodiment shown in FIGS. 19 and 20 is different from the dust protection cover 8 for the brush cutter according to the embodiment shown in FIGS. The structure of a part of the part 8A and a part of the lower flat plate part 8B are different. That is, the brush protection cover 8 for the brush cutter according to the above embodiment and the brush protection cover 80 for the brush cutter according to the third embodiment shown in FIGS. 19 and 20 are the upper side of the lower flat plate portion 8B. The lower upper side bent piece 8H is formed over the entire length of 8B-4, and the bent piece is not formed on the other side edge 8A-3 of the upper flat plate portion 8A. The latter has a lower upper side bent piece 8H formed only on a part of the upper side 8B-4 of the lower flat plate part 8B, and the remaining upper side 8B-4 is formed as a recess 80A in which the support column 2 is fitted. 8A-3 is a bent piece portion (upper other side) that prevents the scattering protection cover 8 for the brush cutter from coming into contact with the support column 2 in a state where the support column 2 is held by the holding means 9 at the other side edge 8A-3. Side bend piece part) 80B is provided. Only in that the manner, both are different. According to the brush protection cover 80 for the brush cutter according to the third embodiment, the strength of the brush protection cover 80 for the brush cutter can be improved by the bent piece portion (upper other side bent piece portion) 80B. At the same time, the recess 80A makes it easy to adjust the attachment position of the brush cutter scattering protection cover 80 to the support column 2. In FIGS. 19 and 20 showing the second embodiment, the same reference numerals as those in FIGS. 1 to 9 showing the one embodiment represent the same contents as those in FIGS.

DESCRIPTION OF SYMBOLS 1 Brush cutter 2 Strut 3 Cylindrical transmission mechanism storage body 4 Cutter member 5 Driving device 6 Grip handle 7 Shoulder band 8 Scatter protection cover 8A Upper plane plate part 8A-1 Upper side plate part 8A Upper side 8A-2 Upper part One side edge 8A-3 of the flat plate portion 8A The other side edge 8B Lower flat plate portion 8B-1 Lower sides 8B-2 and 8B-3 of the lower flat plate portion 8B Both sides 8B-4 of the lower flat plate portion Upper side 8C Upper side bent piece 8D Upper side bent piece 8E Lower lower bent piece 8F, 8G Lower side bent piece 8H Lower upper bent piece 8K-1 Corner outer peripheral wall 8K-2 Corner Part outer peripheral wall 9 Clamping means 10 Fixing member 11 Support column clamping member 12 L-shaped fixture 12A Standing one side 13 Reinforcing plate 14 First fastener 15 Mounting frame 15A Sliding groove 15B Second fastener mounting hole 16 Second tightening Fitting 17 Pinning frame member 17A V-shaped fitting recess 17B Upper surface through-hole 17C Lower surface through-hole 17D Cylindrical reinforcement 18 Holding plate member 18A V-shaped fitting recess 18B Upper surface through-hole 18C Cutting opening 19 Fastening for clamping Tool 20 Threaded rod 20A Head 21 Nut body 22 Non-rotating member 23 Split pin

Claims (5)

A long column, a cylindrical transmission mechanism housing provided at the tip of the column, a cutter member rotatably provided on the cylindrical transmission mechanism housing, and a drive for rotating the cutter member A driving device provided on the rear end side of the support column, a grip handle provided on the support column to swing the support column to the left and right, and a splash protection cover provided between the grip handle and the cutter member; In a brush cutter provided with at least clamping means for detachably attaching the scattering protection cover to the support column,
The holding means includes a fixing member fixed to the scattering protection cover for the brush cutter, and a column holding member provided with a pair of V-shaped fitting recesses provided on the fixing member for holding the column. The brush cutter is configured to attach the scattering protection cover to the column by clamping and fixing the column between the pair of V-shaped fitting recesses of the column holding member.   2. The configuration according to claim 1, wherein the position where the scattering protection cover is attached to the support is adjustable in both the longitudinal direction of the support and the direction substantially perpendicular to the longitudinal direction of the support. Brush cutter.   An upper flat plate portion that extends upward and to one side of the support column in a state in which the support rod is clamped by the clamping device, and the support column is connected to the upper flat plate portion by the clamping device. A lower flat plate portion extending downward and on both sides of the support column in a sandwiched state, an upper upper bent piece provided on the upper side of the upper flat plate portion and bent toward the tip end side of the support column, and the upper portion An upper side bent piece provided on one side of the flat plate portion and bent toward the front end side of the column, and a lower side plate provided on the lower side of the lower flat plate unit toward the front end side of the column. The lower lower side bent piece portion formed by bending, and the lower side side bent piece portion provided on both sides of the lower flat plate portion and bent toward the tip end side of the support column. Bush cutter as claimed in any one of 1 to 2.   When the supporting means is clamped by the clamping means and the scattering protection cover for the brush cutter is fixed to the support, the upper flat plate portion and the lower flat plate portion are substantially aligned with respect to the longitudinal center line of the support column. It is in a state extending in a right angle direction, and the side edge of the lower flat plate portion is projected without projecting the other side edge of the upper flat plate portion outward from the outer peripheral surface in the longitudinal direction of the column. The cutting of claim 3, wherein the side closer to the other side edge of the upper flat plate portion is configured to protrude outward from the outer peripheral surface in the longitudinal direction of the support column. Payment machine.   The fixing member includes an L-shaped fixture having an L-shaped cross section, a reinforcing plate serving as a reinforcement when the L-shaped fixing device is fixed to the scattering protection cover for a brush cutter, and the reinforcing plate and the L-shape. A plurality of first fasteners for fixing the fixing tool to the scattering protection cover for the brush cutter, an attachment frame body for slidably attaching the column holding member to the L-shaped fixing tool, and the attachment frame body Is provided with at least a plurality of second fasteners for fixing to the L-shaped fixture, and the column holding member is slid on the mounting frame in a direction substantially perpendicular to the longitudinal direction of the column. And a support frame holding member, a holding frame member having a V-shaped fitting recess, a holding plate member having a V-shaped fitting recess, and the holding member A state in which the fitting recess of the frame member and the fitting recess of the holding plate member face each other Two clamping fasteners for attaching the clamping plate member to the clamping frame member and slidably attaching the clamping plate member and the clamping frame member to the attachment frame body The brush cutter according to any one of claims 1 to 4, wherein at least a brush cutter is provided.

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