JP2013013386A - Bush cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bush cutter capable of easily preventing a cut object from being wound into the center part of a rotary blade.SOLUTION: An operating member includes a wound-in cut object lifting member along the longitudinal direction of the operating member. The wound-in cut object lifting member includes an operating end provided at a drive source; a holding part for holding it movably in two directions along the longitudinal direction of the operating member; and a tip part that has a tip brought into contact with the surface of a head member when moved to the head member side, and a cut object holding end formed on the side facing the tip to hold the wound-in cut object in the wound-in state. When the cut object is wound in and held to the cutting holding end, if the operating end is drawn to the drive source along the operating member, the wound-in cut object lifting member lifts the cut object wound in and held to the cut object holding end, to form an enlarged space between the cut object and the surface of the head member.

Description

  The present invention relates to a brush cutter for use in cutting weeds and the like, and more particularly, to a brush cutter that can prevent the brush cutter from being caught in the central portion of a rotary blade of the brush cutter.

  Conventionally, a brush cutter has a head member attached to one end of an operation member containing a member for transmitting a driving force from a driving source such as an engine, and a rotary blade having a rotation shaft in the center is rotatably attached to the head member for operation. The other end of the member is connected to the engine, and the rotary blade is rotated at high speed by the driving force of the engine. This rotary blade is provided with a plurality of cutting blades on the outer periphery, and an object to be cut off such as weeds can be easily mowed by rotating the rotary blade at high speed and swinging left and right.

  In this brush cutter, the operation member includes a handle such as a loop handle, a two-grip handle, or a two-hand handle, and a throttle lever is provided on the grip of the operation member or the handle. The user can control the rotation and stop of the rotary blade by adjusting the vertical or horizontal posture of the operation member with the handle and operating the throttle lever.

  As a problem common to brush cutters having a rotary blade that rotates at high speed in this way, when the weeds and the like are cut off mainly by the rotary blade, the brushed material is wound around the head member, that is, the central portion of the rotary blade. There is a problem that the rotation of the rotary blade fluctuates or stops.

  In addition, as another problem, for example, during cutting work, the rotating blade is accidentally brought into contact with a hard obstacle such as concrete that is not subject to cutting, and the rotating blade may be damaged. There has been a problem in that workability is lowered due to contact and generation of shock and annoying contact sound. In addition, the above-described brush cutter requires that the user always maintain the height from the ground to the rotary blade when the height of the portion to be trimmed is to be kept constant. When an object is on a slope, there is a problem that it becomes a burden on the user and it becomes difficult to work for a long time.

  In order to solve these problems, various proposals have been made. For example, Patent Document 1 discloses a grass cutter that is attached to a mowing machine that has a rotating mowing blade at the tip, and receives the cut grass cut by the mowing blade and moves the grass cutter along with the swinging mowing operation of the mowing machine. Thus, there has been proposed a mowing machine in which a main body of a grass cutter is formed of a rod-like body that is horizontally placed above the mowing blade and a convex or concave grass hanging portion is formed.

  According to the present invention, the grass that is cut and scattered by the mowing blade of the mower can be received by the grass gathering tool, and the cut grass can be efficiently brought to one side. Thus, it is possible to prevent the brushed material from being caught in the central portion of the rotary blade.

  In order to solve the other problems described above, Patent Document 2 discloses that a support body on which a rotary blade having a blade portion on its outer periphery is rotatably supported is connected to an engine via an operation member. In the provided oscillating mower, an oscillating mower having a sled portion for actively holding a support on the ground surface on both sides of the rotary blade has been proposed.

  According to this invention, both sides of the rotary blade can be protected by the sled portion, and the height from the ground to the rotary blade can be kept constant, so the burden on the user can be reduced. it can.

  Further, Patent Document 3 discloses a guide structure for a brush cutter used in a brush cutter in which a brush cutter driven to rotate at the tip of a handle shaft is rotatably provided. Applying a mounting structure of a guide unit for a brush cutter that is mounted on a side so that the guide unit can be rotated relative to a rotating shaft on which a brush cutter blade is mounted via a bearing. Has been proposed.

  According to the present invention, by providing the guide portion, it is possible to reduce the occurrence of an impact or an annoying contact sound caused by the contact between the cutting blade and the ground or stone during mowing work, and rotation. By bringing the flexible guide portion into contact with the ground, the user can work by swinging the brush blade smoothly to the left and right, and the burden on the user can be reduced.

JP 2003-143919 A Japanese Utility Model Publication No. 02-134821 JP 2008-182964 A

  However, in the invention described in Patent Document 1 or Patent Document 3 described above, when the length of the brushed object is longer than the outer periphery of the head member, the brushed object is placed on the outer peripheral portion of the head member, that is, the central portion of the rotary blade. There still remains a problem that causes troubles such as stopping of rotation of the rotary blade due to the winding. As a result, it is necessary to temporarily suspend the work for removing the wound brushed material, and there is a problem in that workability is significantly reduced. Further, in the invention of Patent Document 1, it is necessary to switch the attachment and detachment of the weeding tool according to the state of mowing such as weeds, which also causes a problem of reducing workability.

  In the invention described in Patent Document 3, it is advantageous to protect the both side surfaces of the rotary blade because the warp is provided, but it is impossible to prevent the stagnation of the stubble, and the long time. The mowing work cannot be performed.

  An object of the present invention is to provide a brush cutter that can easily remove a brush cutter when it is caught in the central portion of the rotary blade of the brush cutter, and can easily prevent a large amount of stagnation. It is to provide. Thus, continuous mowing is possible.

  The objective of this invention is providing the brush cutter which can protect a rotary blade from an external obstruction, and a user can hold | maintain the height from a ground to a rotary blade easily and uniformly.

The brush cutter according to the present invention includes an operation member, a head member provided at one end of the operation member, a drive source provided at the other end of the operation member, and a rotary blade rotatably connected to the bottom of the head member And a rotary blade protection member provided at the bottom of the rotary blade, and the head member connects the operation member to the rotary blade by forming a predetermined elevation angle with respect to the upper surface of the rotary blade. In the brush cutter that is configured and the rotary blade is rotationally driven by a driving force by the driving source,
The operation member is provided with a rolled-up brush lifting member along the longitudinal direction of the operation member,
The entrainment brush lifting member includes an operation unit main body, an operation end provided on the drive source side, a tip that contacts the surface of the head member facing the rotary blade when moved to the head member side, and the An operation portion including a tip portion provided with a brushed material holding end that holds the wound brushed material formed on the side facing the tip in a wound state, and the operation portion along the longitudinal direction of the operation member. It has a holding part that holds it so that it can move in both directions,
When the operation end portion is drawn along the operation member to the driving source when the cutting material is held in the state of holding the brush cutting end, the entrainment brush lifting member is An enlarged gap is formed between the surface of the head member by lifting the brushed material in a state of being wound and held at the material holding end.

  The brush cutter according to the present invention is characterized in that the brush cutter holding end has a blade shape.

  The brush cutter according to the present invention is characterized in that the tip portion is disposed so as to cross the surface of the head member in the outward direction.

  The brush cutter according to the present invention is characterized in that the entrainment brush lifting member can be lifted by 5 cm or more.

  Since the brush cutter of the present invention is configured as described above, it is possible to easily prevent the brush cutter from being wound around the central portion of the rotary blade, and it is possible to prevent the user from deteriorating workability. In addition, since the rotary blade can be protected from external obstacles, significant wear of the rotary blade can be suppressed and it can be used economically.

The schematic perspective view which shows the external appearance of the brush cutter which is an Example of this invention. The schematic bottom view of the brush cutter which is an Example of this invention. The longitudinal cross-sectional view of the brush cutter which is an Example of this invention. The cross-sectional view of a lifting member. The block diagram of the front-end | tip of a lifting member. The figure explaining the function of a lifting member.

  Hereinafter, a brush cutter according to an embodiment of the present invention will be described with reference to the drawings. However, the configuration of the drive source and the detailed configuration of the operation member applied to the brush cutter according to the present embodiment will be described without using a conventional configuration as illustrated.

  FIG. 1 shows the appearance of a brush cutter 100 according to an embodiment of the present invention. Moreover, the longitudinal cross-sectional view of this brush cutter 100, a side view, and a bottom view are shown in FIG.2, FIG.3, FIG.4, respectively.

  As shown in FIG. 1, the brush cutter 100 in the embodiment of the present invention includes an operation member 1, a head member 2 provided at one end of the operation member 1, and a drive source (not shown) provided at the other end of the operation member 1. And a rotary blade 3 rotatably provided on the bottom 2A of the head member 2 and a rotary blade protection member 4 provided on the bottom of the rotary blade 3. Reference numeral 2B denotes the surface of the head member 2, which is the surface facing the rotary blade 3.

  The head member 2 is configured to connect the operating member 1 to the rotary blade 3 by forming a predetermined elevation angle 5 with respect to the upper surface 3B of the rotary blade 3, and the rotary blade 3 is driven by a driving force from a driving source. It is configured to be rotationally driven.

  Further, as shown in FIG. 1, the rotary blade protection member 4 is provided with a sled member 40 having a sled portion 4A at both ends, and one of the sled portions 4A is sled at one end on the operation member side. A protrusion 51 (FIG. 3) is provided in a shape along the shape of the portion 4A, extending toward the operating member, and inclined toward the rotary blade 3 with respect to the sled portion 4A. One end of the projecting portion 51 and one end of the L-shaped connecting member 52 are connected by a connecting portion 53, and the other end of the connecting member 52 and the operation member 1 are separated from the head member 2. It is configured to be connected by a certain connecting portion 54.

  The connecting member 52 is provided in parallel to the central axis of the operation member 1. Accordingly, the user can adjust the elevation angle 5 of the rotary blade 3 with respect to the ground by using the bottom 4B of the sled member 40, that is, the grounding portion as a fulcrum, by adjusting the elevation angle 5 of the connection member 52 with respect to the ground by visual confirmation. . That is, it is possible to appropriately adjust the height of the mowing point from the ground of the mowing object.

  The coupling portions 53 and 54 are provided with female screw portions or through holes 53A and 54A, respectively, and by connecting or fitting a coupling member such as a male screw to the coupling portions 53 and 54, each member 1, 51, 52 is configured to be fastened and fixed.

  The configuration of the operation member 1 and the drive source of the brush cutter 100 described above will be described in detail below. The operation member 1 has a rod-like elongated shape, and a drive shaft 9 for transmitting a driving force from the driving source is provided in the operation member 1 so that the driving force is transmitted from the driving source to the rotary blade 3. It is configured.

  In addition, a U-shaped handle for the user to operate the behavior of the rotary blade 3 during the mowing operation is attached near the center of the operation member 1. A grip is attached. As a result, the user can easily adjust the vertical and horizontal postures of the rotary blade 3 via the operation member 1 by holding the handle with both hands and pulling the brush cutter.

  Further, the operating member 1 or the left and right grips are provided with a throttle lever that can control the driving force of a driving source, which will be described later. The driving force is controlled by operating this throttle lever, and the rotational speed of the rotary blade 3 is controlled. Can be freely controlled. For example, the rotation and stop of the rotary blade 3 can be easily switched by operating the throttle lever.

  As a drive source, a clutch type internal combustion engine for rotationally driving the rotary blade 3 via a drive shaft 9 provided in the operation member 1 is attached via a fixture at the other end of the operation member 1. ing. Further, gasoline is used as the fuel of the clutch type internal combustion engine, and for this reason, a fuel tank is attached to the internal combustion engine.

  The driving source of the brush cutter 100 of the present embodiment is configured to rotate the rotary blade 3 by transmitting the driving force generated by the clutch type internal combustion engine to the drive shaft 9. The driving source of the brush cutter 100 according to the present embodiment is capable of driving the rotary blade 3 at a high speed and controlling the rotational speed of the rotary blade 3 to some extent by a throttle lever capable of controlling the driving force of the drive source described above. Needless to say, another drive source can be applied.

  Next, the configuration of the head member 2, the rotary blade, and the drive mechanism unit 10 will be described in detail with reference to FIG. The inside of the head member 2 has a hollow structure and is provided with a drive mechanism unit 10. The drive mechanism unit 10 is configured to connect a drive transmission unit of the operation member 1 and the rotary blade 3 to transmit a driving force to the rotary blade 3.

  Further, the bottom portion 2 </ b> A of the head member 2 is bent toward the rotary blade 3 and is provided so as to be substantially in contact with the upper surface 3 </ b> B of the rotary blade 3. A recess is formed in the bottom 2 </ b> A of the head member 2. The head member 2 is configured such that the operating member 1 forms a predetermined elevation angle 5 with respect to the upper surface 3B of the rotary blade 3 through the outer wall 2D. The elevation angle 5 is determined based on the average height position of the hand holding the handle of the operation member 1 of the user who is the user, the distance from the user to the rotary blade 3 and the length of the operation member 1. Is set to an angle that is easy to use on average.

  In the drive mechanism unit 10, the rotary shaft 30 is inserted into an insertion hole 3 </ b> D formed in the center of the rotary blade 3, and the rotary blade 3 is sandwiched between the clamping member 31, the pressing member 32, and the inner case 33. The rotary shaft 30 is fixedly attached.

  Further, the rotary shaft 30 is provided with a rotary power transmission unit (not shown) inside the head member 2, and the rotary shaft 30 and the drive transmission unit of the operation member 1 are connected via the rotary power transmission unit. . The rotational power transmission unit is constituted by, for example, a plurality of bevel gears, and is configured to convert the driving force by the drive transmission unit into the rotational force of the rotary shaft 30, that is, the rotational force of the rotary blade 3.

  The clamping member 31 is a disk-like body, and is coupled to the rotary shaft 30 by screwing a female screw 31A formed at the center with a male screw 30A formed on the rotary shaft 30. The inner case 33 is a substantially cup-shaped body facing downward, and the rotating shaft 30 is inserted through an insertion hole 33A formed at the center. A nut 34 is screwed onto the tip of the rotary shaft 30, and by tightening the nut 34, the inner case 33 is pressed against the rotary blade 3 and the sandwiching member 31 via the pressing member 32, thereby rotating the rotary blade. 3 is fixedly attached to the rotary shaft 30.

  Further, the inner case 33 has an inner peripheral surface of the bearing 35 mounted on the outer peripheral surface, and a nut 34 is accommodated on the inner side. As the bearing 35, for example, a ball bearing such as a radial ball bearing is used. Similarly, a bearing 36, which is a ball bearing, is mounted on the rotary shaft 30 above the clamping member 31. Further, locking members 37 and 38 are mounted on the outer peripheral surfaces of the pressing member 32 and the bearing 35, and the pressing member 32 and the bearing 35 are locked so as not to be displaced outward.

  The drive mechanism unit 10 is configured as described above, and the rotary blade 3 is configured to be rotatable by the rotating shaft 30 of the drive mechanism unit 10 via the clamping member 31, the pressing member 32, the inner case 33, and the nut 34. The That is, the rotary blade 3 is rotatably provided at the bottom portion 2 </ b> A of the head member 2 via the drive mechanism unit 10.

  The rotary blade 3 used in the brush cutter 100 of the present embodiment is a metal disc, and a plurality of convex portions 3E and concave portions 3F are alternately formed along the outer periphery 3C of the disc, and the convex portions 3F are formed on the convex portions 3F. The blade 3G is formed. Such a rotary blade 3 may be used by replacing the blade 3G with a carbide tip.

  As shown in FIG. 3, the rotary blade protection member 4 used in the brush cutter 100 according to the present embodiment is configured such that the protection member bottom portion 4 </ b> C is fitted and fixed to the outer peripheral surface of the locking member 38 (FIG. 2). Has been. The protective member bottom portion 4 </ b> C is formed by a fitting hole 41, a vertical protruding portion 42, a horizontal protruding portion 43, and a cylindrical portion 44. Further, the fitting hole 41 is configured to be fitted and connected to the outer peripheral surface of the locking member 38 described above. Further, the locking lid 39 is fixedly attached to the bottom of the locking member 38 by screwing or the like so as to be fitted to the inner peripheral surface of the fitting hole 41.

  Further, the rotary blade protection member 4 includes inner sled members 45 at the bottoms of the lateral protrusions 43 provided in the vicinity of the outer periphery of the cylindrical portion 44 on both sides of the protection member bottom 4C. Further, at both ends of the sled member 45, a sled portion 4A warped toward the rotary blade 3 is provided. Furthermore, an outer sled member 40 is provided at the end of the lateral protrusion 42, that is, outside the inner sled member 45. At both ends of the sled member 40, similarly to the sled member 45 described above, sled portions 4A that warp toward the rotary blade 3 are provided. One of the sled portions 4A is provided with the protruding portion 51 at the operation side end as described above.

  Further, the vertical projecting portion 42, the outer sled member 40, and the inner sled member 45 are provided so as to extend in the longitudinal direction of the operation member 1. This is because the user smoothly moves the outer sled member 40 and the inner sled member 45 outward using the resistance in the pushing direction of the operation member 1, that is, the longitudinal direction of the operation member 1.

  Further, as shown in FIG. 2, the outer sled member 40 and the inner sled member 45 are provided at a predetermined height interval 6 from the rotary blade 3. In the case of this example, since one outer sled member 40 is provided, it becomes the outermost sled member, and the outermost sled portion 4A provided at both ends of the rotation protection member 4 has a width dimension 7 at both ends of the rotary blade. It is provided to be larger than the outer diameter 3C. As shown in FIG. 3, the operation member side tip of the inner sled member 45 is inside the outer diameter 3C of the rotary blade, and the opposite side tip sled portion 4A is outside the outer diameter 3C of the rotary blade.

  In the above configuration, in FIG. 1, the present example includes a rolled-up brush lifting member (hereinafter referred to as a lifting member) 11 attached to the operation member 1. In this way, the lifting member 11 approaches the operation member 1 and is arranged close to it. The lifting member 11 is fixed to the operating member 1 along the longitudinal direction of the operating member 1, and a part of the operating member is configured to be movable.

  The lifting member 11 includes an operation unit 12 and a holding unit 13 that holds the operation unit 12 by fixing the operation unit 12 to the operation member 1.

  The operation unit 12 is arranged substantially in parallel with the longitudinal direction of the operation unit 12 and includes an operation unit main body 14 in the center portion, a tip 15 positioned on the head member side, and an operation end 16 positioned on the drive source. .

  The distal end portion 15 and the operation end portion 16 may be integrated with the operation portion main body 14 or may be attached to the operation portion main body 14 by welding. In the case of this example, the distal end portion 15 is attached by welding, and the operation end portion 16 is integrally formed.

  In FIG. 4, the holding unit 13 includes both a holding unit main body 17, an operation unit 12 provided inside the holding unit main body 17, that is, a through-hole part 18 that allows the operation unit main body 14 to pass therethrough and slides. It is comprised from the fastening part 20 by the screw | thread provided in the stop part 19 and the bidirectional | two-way edge part which protrude in the direction and circulate around the operation member 1.

  Thus, since it is set as the stop part 19 and the fastening part 20, it can fix to the arbitrary positions of the operation member 1 suitably, but it is also possible to provide a fixing means by welding.

  As shown in FIG. 1, the holding unit main body 17 has a notch 21 that is not seen outward from the operation member 1, so that the sliding of the operation unit main body 17 can be visually observed from the outside. In addition, the weight of the holding portion 12 is reduced.

  In FIG. 4, the stop portion 19 is fixed to the operation member 1 by the screw operation of the fastening portion 20 and the holding portion 12 is firmly fixed to the operation member 1 with the through-hole portion 18 disposed in the vertical direction. , Retained.

  In FIG. 1, the operation unit 12 of the lifting member 11 includes the above-described operation unit main body 11, the head member-side tip 15 and the drive source-side operation end 16, and the holding unit 13 includes the operation unit as an operation member. It is held so that it can be moved bidirectionally along the longitudinal direction of one.

  As shown in FIG. 5, the distal end portion 15 includes a distal end 21 that contacts the surface of the head portion member and a side opposite to the distal end 21 when the operation portion main body 11 is moved to the head member side by the operation of the operation end portion 16. It is comprised by the head part 24 provided with the cut material holding | maintenance end 22 which hold | maintains the wound cut material formed in (2) in the winding state.

  The tip 21 can be formed in a straight line shape or a curved shape, but it is sufficient that the head member 2 is in one-point contact or line contact. You may make it attach the rubber member and polyethylene material which contact | abut to the head member 2 at the front-end | tip 21. FIG.

  The distal end 21, that is, the distal end portion 15 is disposed so as to cross the surface 2 </ b> B facing the rotary blade of the head member 2, and contacts the surface 2 </ b> B. Any structure that substantially contacts may be used. Substantially means that there is no room for the cut weeds. The angle may be a right angle direction, but is preferably an acute angle toward the operation member, that is, in the rotation direction.

  If the cut-off material holding end 22 is formed in a straight line shape or a curved shape, the cut-off material can be held in the wound state in advance, but other shapes may be used. By doing so, it becomes convenient to cut the rolled-up brush. As one of the blade shapes, a tooth shape 23 can be formed as shown in FIG.

  The operation unit 12 can be provided with fixing means so that the tip 21 is in contact with the head member 2 at the time of cutting. However, if the operation part itself has a weight, the fixing means is provided. Even without this, the tip 21 can be kept in sufficient contact with the head member 2.

  The operation of the brush cutter 100 according to this embodiment will be described with reference to FIG.

  As shown in FIG. 6 (a), most of the brushed product 31 cut by the rotary blade 3 is released to the outside of the brush cutter 100, but part of the brushed product 32 is caught in the head member 2. , Will be stuck. As described above, the bottom portion 2A of the head member 2 is bent toward the rotary blade 3, and the surface 2B is formed so as to have a concave portion. Is trapped on the surface 2B. Even if the concavity to be stagnated is not formed, the brushed product 32 is caught in the surface 2B of the head member 2, and it is entangled and stagnated.

  In the case of the present embodiment, the lifting member 11 is disposed close to the operation member 1, and the tip is moved so as to be able to contact the surface 2B opposed to the rotary blade 3 of the head member 2. As a result, a part of the brushed material 32 is caught in the head member 2, entangled, and as it accumulates, it is also caught in the chopped material holding part 22 of the lifting member 11 and entangled. It will be piled up. Since the tip 21 of the lifting portion 11 is brought into contact with the surface 2B of the rotary blade 3 that is oppositely disposed, the cut material 32 entangled with the head member 2 is reliably placed on the cut material holding end 22 Thus, the head member 2 is entangled and stuck.

  The mowing object 32 held in the rolled-up state by staying in the mowing thing holding part 22 can be confirmed visually. As a result, the removal timing of the cut material is determined.

  When the rolled state of the brushed product is confirmed by visual observation, the operator who is the user performs an operation of lifting the operation unit 13 of the lifting member 11 to the drive source side. In this case, the lifting amount can be set to about 3 to 15 cm, preferably about 7 ± 3 cm. Naturally, the lifting amount varies depending on the nature of the brushed article 31. In any case, if it is lifted 5 cm, it is sufficiently effective.

  In FIG. 6B, when the operation portion end 16 is drawn to the drive source along the operation member 1 when the cut material 32 is wound and held on the brush holding end 22, The cut object holding end 22, that is, the lifting member 11 lifts the cut and cut object 22 in a state of being held in the wound, and forms an enlarged space 30 between the surface of the head member 2. The reason for the enlarged gap 30 is that only a small gap is formed between the head member 2 even when the tip 21 before being lifted is in contact with the head member 2 at any point. By becoming.

  When the lifting member 11 is lifted, some of the brushed products are cut when the brushed product holding end 22 has a blade shape. The cut brush is discharged outward from the rotary blade.

  Even if the cutting material holding end 22 does not have a blade shape, a part of the cutting material is cut. Even when there is resistance to lifting without being cut, a gap enough to allow the user's finger to enter can be formed between the brush cutter and the head member 2 or the rotary blade 3. The user can insert the finger into the gap and cut the brushed product manually. Of course, in this case, the rotation of the rotary blade 3 is stopped.

  It is not only the weeds that have been harvested that will be in the holding state. For example, things like thin vinyl strings are often tangled. The vinyl string or the like is not cut even when the lifting member 11 is lifted, but it can be easily cut by inserting a blade edge of a cutter (not shown) into the formed gap.

  In this way, by sequentially removing the mowed material that has accumulated during the weed mowing operation, the mowing operation can be continued for a long time, and the trimmer is stopped as before. The need to work to remove thorny weeds is avoided.

  As described above, the brush cutter according to the present embodiment includes the sled portion in which the rotation protection member and the predetermined height position are placed on the rotation protection member, so that the user easily holds the height position of the rotation blade. In particular, since the rotary blade can be moved smoothly along the traveling direction of the operation member, that is, the front-rear direction, the brush cutting work by the user can be stabilized even in places such as side grooves with obstacles. It is possible to reduce fatigue caused by long-time work. Furthermore, since the width dimension between both ends between the sled portions is made larger than the outer diameter of the rotary blade, the wear of the blade due to contact of the rotary blade with an external hard obstacle can be reduced.

  Moreover, in the brush cutter of a present Example, the shaving operation by a user becomes stable as mentioned above by providing a sledge part in the bottom part of a rotary blade. Further, the brushed material does not entangle with the holding member of the sled portion. As a result, weeds and the like can be more easily cut from the root, and the length can be easily reduced, compared to a brush cutter that does not have a sledge and swings the rotary blade to the left and right to cut off the weeds and the like. Can be a long cut. Therefore, the brush cutter according to the present embodiment can prevent a long brush cutter from being wound around the central portion of the rotary blade, and is particularly effective for a general-purpose brush cutter having a sled portion at the bottom of the rotary blade. .

  The present invention is configured as described above, so that the brushed material is wound around the central portion of the rotary blade, and when it gets entangled, it is easily removed so that it can stay in a large amount. It is possible to prevent the deterioration of workability by the user. Moreover, since the rotary blade can be protected from an external obstacle by using the configuration of the sled member as described above, the wear of the rotary blade can be suppressed, and the effect of the function of the lifting member can be achieved. Enables continuous brush cutting over hundreds of meters.

  DESCRIPTION OF SYMBOLS 1 ... Operation member, 2 ... Head member, 2A ... Bottom part of head member, 3 ... Rotary blade, 4 ... Rotary blade protection member, 4A ... Sled part, 4C ... Bottom part, 5 ... Elevation angle, 6 ... Height gap, 7 ... Width dimensions at both ends, 10... Drive mechanism section, 11... Lifting member (rolling brush lifting member), 12 .. operation section, 13 .. holding section, 14. Part 17, holding part body 18, through-hole part 19, stopper part 20, fastening part 21, tip 22, cutting material holding end 23, tooth shape 31, 32, cutting object, 40 ... sled member, 100 ... brush cutter.

Claims (4)

An operation member, a head member provided at one end of the operation member, a drive source provided at the other end of the operation member, a rotary blade rotatably connected to the bottom of the head member, and a bottom of the rotary blade And the head member is configured to connect the operation member to the rotary blade by forming a predetermined elevation angle with respect to the upper surface of the rotary blade. In a brush cutter that is rotationally driven by the driving force of the driving source,
The operation member is provided with a rolled-up brush lifting member along the longitudinal direction of the operation member,
The entrainment brush lifting member includes an operation unit main body, an operation end provided on the drive source side, a tip that contacts the surface of the head member facing the rotary blade when moved to the head member side, and the An operation portion including a tip portion provided with a brushed material holding end that holds the wound brushed material formed on the side facing the tip in a wound state, and the operation portion along the longitudinal direction of the operation member. It has a holding part that holds it so that it can move in both directions,
When the operation end portion is drawn along the operation member to the driving source when the cutting material is held in the state of holding the brush cutting end, the entrainment brush lifting member is The brush cutter is characterized in that an enlarged gap is formed between the surface of the head member by lifting the cutter held in a state of being held in the cutter holding end.   2. The brush cutter according to claim 1, wherein the brush-claw holding end has a blade shape.   2. The brush cutter according to claim 1, wherein the tip portion is disposed so as to cross the surface of the head member in an outward direction.   The brush cutter according to claim 1, wherein the entrainment brush lifting member can lift 5 cm or more.

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