JP2015116131A - Pruning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid lowering of working efficiency of a pruning machine.SOLUTION: The pruning machine 10 which reciprocates a first pruning blade 16 and a second pruning blade 17 in a relative manner in a predetermined direction by power of an engine 13 and cut an object off by shear force of the first pruning blade 16 and the second pruning blade 17, comprises: a plurality of first shear edges 19 and a plurality of second shear edges 20 provided to the first pruning blade 16; a plurality of third shear edges 32 and a plurality of fourth shear edges 33 provided to the second pruning blade 17; and a saw 22 provided to the first pruning blade 16, where the saw 22 includes a plurality of cutting edges 27. A range in which the plurality of second shear edges 20 are provided in the predetermined direction: is wider than a range in which the plurality of first shear edges 19 are provided in the direction; and includes a range in which the plurality of fourth shear edges 33 are provided in the direction.

Description

  The present invention relates to a trimming machine including a pair of cutting blades that reciprocate.

  A trimming machine that cuts objects such as planting and hedges is known, and an example of the trimming machine is described in Patent Document 1. The trimming machine described in patent document 1 has an engine provided in the trimming machine main body and a blade assembly attached to the trimming machine main body. The blade assembly includes a first cutting blade and a second cutting blade, and a guide bar that supports the first cutting blade and the second cutting blade so as to be movable in the longitudinal direction. Is fixed to the main body of the trimming machine. The first cutting blade has a plurality of shearing blades provided at intervals along the longitudinal direction, and the second cutting blade is a plurality of shearing blades provided at intervals along the longitudinal direction. Have

  Further, the power cutter main body is provided with a power conversion mechanism, and the rotational movement of the output shaft of the engine is converted into the reciprocating movement of the first cutting blade and the second cutting blade. Here, the first cutting blade and the second cutting blade operate in directions opposite to each other, whereby the object can be cut by a shearing force.

JP 2013-121328 A

  By the way, when it is going to cut | disconnect a thick branch and a hard branch with a trimming machine, the shear blade of a 1st cutting blade or a 2nd cutting blade may bite into a branch. In order to prevent this inconvenience, a thick branch or a hard branch has to be cut in advance with a pruning scissor or a saw before cutting the branch with a trimming machine, resulting in a problem that the efficiency of the work is lowered.

  An object of the present invention is to provide a trimming machine that can avoid a reduction in the efficiency of work for cutting an object.

  The trimming machine of the present invention includes a first cutting blade and a second cutting blade, and reciprocates at least the first cutting blade in a predetermined direction with the power of a power source so that the first cutting blade and the first cutting blade A cutting machine that cuts an object with a shearing force with two cutting blades, wherein a plurality of first cutting edges are provided on the first side edge along the predetermined direction of the first cutting blade and spaced apart from each other. A shear blade, a plurality of second shear blades spaced from each other on a second side edge of the first cutting blade in the predetermined direction, and the predetermined direction of the second cutting blade A plurality of third shearing blades provided on the first side edge and spaced apart from each other and cutting an object in cooperation with the plurality of first shearing blades; A plurality of second side edges along a predetermined direction spaced apart from each other, and cutting the object in cooperation with the plurality of second shearing blades; 4 shear blades, and a saw that is provided on the first side edge of the first cutting blade and that cuts the object alone, and the saw is disposed along the predetermined direction. A range in which the plurality of second shearing blades are provided in the predetermined direction is wider than a range in which the plurality of first shearing blades are provided in the predetermined direction, and the plurality of the plurality of second shearing blades are provided in the predetermined direction. Including a range in which the cutting blades are arranged in the predetermined direction.

  According to the present invention, when the first cutting blade reciprocates, a thick object or a hard object can be cut by the saw provided on the first cutting blade. Therefore, it can avoid that the efficiency of the operation | work which cut | disconnects a target object falls.

It is a top view which shows the trimming machine of this invention. FIG. 2 is an exploded view of a blade assembly used in the trimming machine of FIG. 1. It is a partial front sectional view of the trimming machine of FIG. It is an enlarged plan view of the blade assembly to which the saw is attached. FIG. 5 is a side sectional view of the blade assembly shown in FIG. 4. It is an enlarged plan view of the blade assembly to which the third cutting blade is attached. FIG. 7 is a side sectional view of the blade assembly shown in FIG. 6.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. A trimming machine 10 shown in FIG. 1 is used when cutting an object, for example, a branch or leaf of a plant, a lawn, a hedge, or the like. Cutting here includes trimming the object to a predetermined length, pruning, adjusting the shape of the entire object, and the like. The trimming machine 10 is called a clipper, a hedge trimmer or the like. The trimming machine 10 includes a trimming machine main body 11 and a blade assembly 12 attached to the trimming machine main body 11. The trimming machine main body 11 is provided with a front handle 11A and a rear handle 11B via a known vibration isolation structure. The trimming machine 10 is a hand-held tool in which an operator holds the front handle 11A with the right hand or the left hand and lifts the rear handle 11B with the opposite hand.

  The trimming machine main body 11 is provided with an engine 13. The engine 13 is a power source for driving the first cutting blade 16 and the second cutting blade 17, and the engine 13 has an output shaft 44. The engine 13 is a known internal combustion engine that converts thermal energy generated by burning fuel into kinetic energy of the output shaft 44, and may be either a gasoline engine or a diesel engine. The rear handle 11B is provided with a throttle lever 11C, and an operator operates the throttle lever 11C to adjust the engine speed, that is, the rotational speed of the output shaft 44.

  The blade assembly 12 projects from the gear case located at the lower end of the trimming machine main body 11 toward the front of the trimming machine main body 11. As shown in FIG. 2, the blade assembly 12 includes a protection plate 14, a guide bar 15, a first cutting blade 16, and a second cutting blade 17. The protection plate 14, the guide bar 15, the first cutting blade 16, and the second cutting blade 17 are assembled in an overlapping manner to form the blade assembly 12. A first cutting blade 16 is arranged between the guide bar 15 and the second cutting blade 17.

  The protection plate 14 is integrally formed of a metal material. The guide bar 15 is an aluminum extruded shape member, and the guide bar 15 supports the first cutting blade 16 and the second cutting blade 17 so as to be capable of reciprocating in the direction along the center line A1. And a role of defining a direction in which the cutting blade 16 and the second cutting blade 17 are reciprocated. The first cutting blade 16 and the second cutting blade 17 are separately formed of tool steel. Tool steel is a metal material obtained by adding carbon, chromium, tungsten, or the like to iron and is subjected to quenching treatment.

  The first cutting blade 16 includes a long base 18, a plurality of first shearing blades 19 provided at intervals on the first side edge of the base 18, and a second side edge of the base 18. A plurality of second shearing blades 20 spaced apart from each other. The first side edge and the second side edge are formed on the first cutting blade 16 in a direction along the center line A1. The plurality of first shear blades 19 and the plurality of second shear blades 20 are convex portions that protrude in the planar direction from the side edges of the base portion 18. The outer peripheral shapes of the plurality of first shearing blades 19 and the plurality of second shearing blades 20 are all V-shaped in plan view as shown in FIG.

  The plurality of first shear blades 19 are arranged at a predetermined pitch in the longitudinal direction of the first cutting blade 16, and the protrusion amounts L2 of the plurality of first shear blades 19 with respect to the center line A1 are all the same. The pitch between the plurality of first shear blades 19 may be the same or different. The pitch is an interval in the direction along the center line A1, and the technical meaning of the interval is the interval between the ends of the first shearing blade 19 or the tip of the first shearing blade 19, and the center. Any distance between lines perpendicular to the line A1 may be used.

  The plurality of second shear blades 20 are arranged at a predetermined pitch in the longitudinal direction of the first cutting blade 16, and the protrusion amounts L2 of the plurality of second shear blades 20 with respect to the center line A1 are all the same. The pitch between the plurality of second shear blades 20 may be the same or different. The pitch is an interval in the direction along the center line A1, and the technical meaning of the interval is the interval between the ends of the adjacent second shear blades 20 or the tip of the second shear blade 20, and Any distance between the lines perpendicular to the center line A1 may be used. Thus, the plurality of first shearing blades 19 and second shearing blades 20 are each formed in a comb shape. The center line A1 is a straight line passing through the center in the width direction of the blade assembly 12, and the longitudinal direction of the blade assembly 12 is a direction along the center line A1.

  As shown in FIG. 2, in the longitudinal direction of the blade assembly 12, a range B <b> 2 where the plurality of second shearing blades 20 are arranged is wider than a range B <b> 1 where the plurality of first shearing blades 19 are arranged. For this reason, the number of the plurality of second shear blades 20 is larger than the number of the plurality of first shear blades 19. The first cutting blade 16 is a shearing blade, and the plurality of first shearing blades 19 or the plurality of second shearing blades 20 provided on the first cutting blade 16 do not cut the object.

  In addition, a pedestal 21 is provided at a location outside the range B1 in which the plurality of first shearing blades 19 are arranged in the longitudinal direction of the first cutting blade 16. The base 21 is a receiving part for attaching and detaching two types of replacement blades. The two types of replacement blades include a saw 22 and a third cutting blade 23. The saw 22 and the third cutting blade 23 can be attached to and detached from the pedestal 21. Either the saw 22 or the third cutting blade 23 is fixed to the base 21 using the screw member 24 and the nut 25. The saw 22 and the third cutting blade 23 are formed separately from tool steel. Tool steel is a metal material obtained by adding carbon, chromium, tungsten or the like to iron and is subjected to quenching treatment or the like.

  The saw 22 includes a base portion 26 and a plurality of cutting blades 27 protruding from the base portion 26 in the width direction. As shown in FIG. 4, the base portion 26 has a plate shape, and the plurality of cutting blades 27 protrude from the side edges of the base portion 26 along the surface direction of the base portion 26. That is, the plurality of cutting blades 27 are formed in a comb shape. The pitch of the plurality of cutting blades 27 is narrower than the minimum pitch between the first shearing blades 19. When the saw 22 is fixed to the pedestal 21, the protruding amount L1 of the plurality of cutting blades 27 with respect to the center line A1 is longer than the protruding amount L2 of the first shearing blade 19 with respect to the center line A1. The saw 22 is a push saw that cuts an object with a plurality of cutting blades 27 when the first cutting blade 16 moves away from the trimming machine body 11.

  As shown in FIGS. 2 and 6, the third cutting blade 23 includes a base portion 28 and a plurality of fifth shear blades 29 protruding from the base portion 28 in the width direction. The base portion 28 has a plate shape, and the plurality of fifth shear blades 29 protrude from the side edge of the base portion 28. As shown in FIG. 7, the plurality of fifth shear blades 29 are arranged in a stepped manner with respect to the base portion 28 in the thickness direction of the first cutting blade 16. More specifically, the plurality of fifth shear blades 29 have a plurality of first shear blades 19 and a plurality of second shear blades in the thickness direction of the first cutting blade 16 in a state of being attached to the base 21. 20 at the same position. The plurality of fifth shear blades 29 are provided in a range B3 in the direction along the center line A1. The range B3 is narrower than the range B1. When the range B3 is added to the range B1, it becomes the same as the range B2.

  The pitch between the fifth shearing blades 29 may be the same or different. Note that the pitch of the plurality of cutting blades 27 is narrower than the minimum value of the pitch between the fifth shearing blades 29. The pitch is an interval in the direction along the center line A1, and the technical meaning of the interval is the interval between the ends of the cutting blade 27 or the tip of the cutting blade 27 and is perpendicular to the center line A1. Any spacing between the lines may be used. Furthermore, the interval between the ends of the fifth shearing blade 29 or the interval between the lines passing through the tip of the fifth shearing blade 29 and perpendicular to the center line A1 may be used.

  When the third cutting blade 23 is fixed to the pedestal 21 as shown in FIG. 6, the protrusion amounts L2 of the plurality of protrusions with respect to the center line A1 are the same as the protrusion amounts L2 of the first shear blade 19 with respect to the center line A1. It is. Even if the first cutting blade 16 operates, the third cutting blade 23 does not cut the object alone, and the first shearing blade 19 of the first cutting blade 16 and the third cutting blade 23 The 5 shearing blade 29 cooperates with the third shearing blade 32 of the second cutting blade 17 so as to sandwich and slide the object, thereby cutting the object with a shearing force.

  The screw member 24 that fixes the saw 22 or the third cutting blade 23 to the pedestal 21 is a flat head screw, and the head of the screw member is disposed in a shaft hole provided in the pedestal 21. For this reason, the head of the screw member 24 does not protrude from the surface of the pedestal 21 in a state where the screw member 24 is tightened and the saw 22 or the third cutting blade 23 is fixed to the pedestal 21.

  Further, as shown in FIG. 2, a plurality of guide holes 30 penetrating the base portion 18 of the first cutting blade 16 in the thickness direction are provided. The plurality of guide holes 30 are arranged at intervals along the longitudinal direction of the first cutting blade 16. The guide hole 30 has a major axis and a minor axis in plan view of the first cutting blade 16, and the major axis is located along the longitudinal direction of the first cutting blade 16. In other words, the guide hole 30 is formed as a long hole.

  The second cutting blade 17 includes a long base 31, a plurality of third shearing blades 32 provided at intervals on the first side edge of the base 31, and a second side edge of the base 31, And a plurality of fourth shearing blades 33 provided at intervals. The plurality of third shear blades 32 and the plurality of fourth shear blades 33 are convex portions that protrude from the side edges of the base portion 31 in the planar direction. The first side edge and the second side edge of the base portion 31 are formed in a direction along the center line A1. The outer peripheral shapes of the plurality of third shear blades 32 and the plurality of fourth shear blades 33 are all V-shaped in plan view.

  The plurality of third shear blades 32 are arranged at a predetermined pitch in the longitudinal direction of the second cutting blade 17, and the protrusion amounts L2 of the plurality of third shear blades 32 with respect to the center line A1 are all the same. The plurality of fourth shear blades 33 are arranged at a predetermined pitch in the longitudinal direction of the second cutting blade 17, and the protrusion amounts L2 of the plurality of fourth shear blades 33 with respect to the center line A1 are all the same. The pitch between the third shearing blades 32 may be the same or different. The pitch between the fourth shearing blades 33 may be the same or different. The range in which the plurality of fourth shear blades 33 are arranged in the direction along the center line A1 is the same as the range B2.

  The pitch is the interval in the direction along the center line A1, and is the interval between the ends of the third shear blades 32 or between the lines passing through the tip of the third shear blade 32 and perpendicular to the center line A1. Any of the intervals may be used. Furthermore, the interval between the ends of the fourth shearing blade 33 or the interval between the lines passing through the tip of the fourth shearing blade 33 and perpendicular to the center line A1 may be used.

  In short, when the first cutting blade 16 and the second cutting blade 17 reciprocate in the direction along the center line A1, the first shearing blade 19, the fifth shearing blade 29, and the third shearing blade 32 are used. Can cooperate to sandwich the object and cut the object by shearing force, and the second shearing blade 20 and the fourth shearing blade 33 can cooperate to sandwich the object and cut the object by shearing force. .

  Thus, the plurality of third shear blades 32 and the plurality of fourth shear blades 33 are formed in a comb shape. The second cutting blade 17 is a shear blade, and the plurality of third shear blades 32 or the plurality of fourth shear blades 33 do not cut the object alone.

  Further, as shown in FIG. 2, a plurality of guide holes 34 penetrating the base portion 31 in the thickness direction are provided. The plurality of guide holes 34 are arranged at intervals along the longitudinal direction of the second cutting blade 17. The guide hole 34 has a major axis and a minor axis in a plan view of the base portion 31, and the major axis is located along the longitudinal direction of the second cutting blade 17.

  The protection plate 14 is integrally formed of steel. The length of the protection plate 14 is shorter than the length of the guide bar 15, and the protection plate 14 has a base portion 35 and a plurality of protrusions 36 provided on both sides in the width direction of the base portion 35. The outer peripheral shapes of the plurality of protrusions 36 are all V-shaped in plan view. A plurality of protrusions 36 are arranged at a predetermined pitch in the longitudinal direction of the base portion 35. As shown in FIG. 1, the protrusion amounts L3 of the plurality of protrusions 36 with respect to the center line A1 are all the same, and the protrusion amount L3 is longer than the protrusion amount L2. Note that, on both sides of the base portion 35, the protrusion amounts L3 of the plurality of protrusions 36 with respect to the center line A1 are all the same. The protection plate 14 is an element that prevents the first cutting blade 16 or the second cutting blade 17 from contacting an object other than the target.

  5 and 7, the first cutting blade 16 is disposed between the guide bar 15 and the second cutting blade 17, and one end in the longitudinal direction of the guide bar 15 is as shown in FIG. Further, it is fixed to the trimming machine main body 11 using a screw member 37. Further, as shown in FIG. 2, the guide hole 34 of the second cutting blade 17 and the guide hole 30 of the first cutting blade 16 are made into one set, and a screw member 38 is inserted into each set of guide holes 30, 34. The screw member 38 is fastened to the nut 39. The plurality of screw members 38 include a screw member 38 fixed to the guide bar 15 using a nut 39 and a screw member 38 fixed to both the guide bar 15 and the protection plate 14 using the nut 39. In a state where the tightening of the screw member 38 is completed, the head of the screw member 38 is not pressed against the second cutting blade 17, and the first cutting blade 16 is along the center line A1 with respect to the guide bar 15. The second cutting blade 17 is movable with respect to the guide bar 15 along the center line A1. Moreover, although the 1st cutting blade 16 and the 2nd cutting blade 17 have overlapped, relative movement is possible along centerline A1.

  Further, a guard plate 40 is attached to the free end of the guide bar 15. The guard plate 40 is fixed to the guide bar 15 by a screw member 41, and the guard plate 40 includes a first projecting portion 42 and a second projecting portion 43 that project in a direction intersecting the center line A1. . The first overhanging portion 42 and the second overhanging portion 43 are arranged on the opposite side across the center line A <b> 1 in the width direction of the guide bar 15. The first projecting portion 42 projects in the same direction as the direction in which the saw 22 projects with respect to the center line A1 in the width direction of the guide bar 15. As shown in FIG. 4, the protruding amount L4 of the first overhanging portion 42 with respect to the center line A1 is larger than the protruding amount L1 of the cutting blade 27 of the saw 22 with respect to the center line A1.

  The second projecting portion 43 projects in the same direction as the direction in which the second shearing blade 20 and the fourth shearing blade 33 project with respect to the center line A1 in the width direction of the guide bar 15. The protrusion amount L5 of the second overhanging portion 43 with respect to the center line A1 is larger than each of the protrusion amount L2 of the second shear blade 20 and the protrusion amount L2 of the fourth shear blade 33 with respect to the center line A1. Further, the protruding amount L4 of the first projecting portion 42 is larger than the projecting amount L5 of the second projecting portion 43.

  On the other hand, a centrifugal clutch 45 and a drive shaft 46 are provided in the trimming machine main body 11 as shown in FIG. The centrifugal clutch 45 is a mechanism that connects or disconnects the power transmission path between the output shaft 44 and the drive shaft 46. The centrifugal clutch 45 is released when the engine rotational speed is equal to or lower than a predetermined rotational speed, and the centrifugal clutch 45 blocks the power transmission path between the output shaft 44 and the drive shaft 46. The centrifugal clutch 45 is engaged when the engine rotational speed exceeds a predetermined rotational speed, and the centrifugal clutch 45 connects a power transmission path between the output shaft 44 and the drive shaft 46. A drive gear 47 is provided on the outer peripheral surface of the drive shaft 46.

  Further, a driven gear 48 is provided in the trimming machine main body 11. The driven gear 48 is rotatably supported by a support shaft 49. The number of teeth of the driven gear 48 is larger than the number of teeth of the drive gear 47, and the driven gear 48 meshes with the drive gear 47.

  Further, a guide 50 that rotates integrally with the driven gear 48 is provided. The guide 50 has a circular outer peripheral surface in a plan view, and the center of the guide 50 is in a position eccentric with respect to the center of the support shaft 49. A guide hole 51 is provided at the end of the first cutting blade 16, and the guide 50 is disposed in the guide hole 51. The guide hole 51 is a long hole, and the long axis of the guide hole 51 is a direction orthogonal to the center line A1. The guide 50 can rotate around the support shaft 49 and can move in the guide hole 51 in the direction along the long axis. Thus, one end of the first cutting blade 16 is connected to the engine 13 so that power can be transmitted, and the other end of the first cutting blade 16 is provided with a saw 22.

  Further, a guide 52 that rotates together with the driven gear 48 is provided. The guide 52 has a circular outer peripheral surface in a plan view, and the center of the guide 52 is in a position eccentric with respect to the center of the support shaft 49.

  When the support shaft 49 is viewed in plan, the center of the guide 52 and the center of the guide 50 are provided at a position of 180 degrees with the center of the support shaft 49 being separated. A guide hole 53 is provided at the end of the second cutting blade 17, and the guide 52 is disposed in the guide hole 53. The guide hole 53 is a long hole, and the long axis of the guide hole 53 is a direction orthogonal to the center line A1. The guide 52 can rotate around the support shaft 49 and can move in the guide hole 53 in the direction along the long axis. In this way, the output shaft 44 is provided so that power can be transmitted to the first cutting blade 16 and the second cutting blade 17 via the centrifugal clutch 45, the drive shaft 46, and the driven gear 48.

  Next, a usage example of the trimming machine 10 will be described. Here, it is assumed that a saw 22 is attached to the base 21 as shown in FIG. An operator operates starting means such as a recoil starter (not shown) to crank the output shaft 44 of the engine 13, and the output shaft 44 of the engine 13 autonomously rotates due to fuel supply and mixture explosion. The operator holds the front handle 11A with the right hand or the left hand, and holds the rear handle 11B with the opposite hand. When the throttle lever 11C is operated and the engine speed exceeds a predetermined speed and the centrifugal clutch 45 is engaged, the torque of the output shaft 44 is transmitted to the drive shaft 46. When the torque of the drive shaft 46 is transmitted to the driven gear 48, the guides 50 and 52 rotate around the support shaft 49. Then, the first cutting blade 16 and the second cutting blade 17 reciprocate along the center line A1.

  Here, when the first cutting blade 16 and the second cutting blade 17 reciprocate in directions opposite to each other and the first cutting blade 16 and the second cutting blade 17 are brought into contact with the object, The object is cut by the shearing force between the cutting blade 16 and the second cutting blade 17. Further, when cutting a branch having a thickness that is difficult to cut by the shearing force of the first cutting blade 16 and the second cutting blade 17 or a hard branch, the first overhanging portion 42 of the guard plate 40 is provided. Hang on the target branch. The term “hanging the first overhanging portion 42 on the branch” means that a branch is positioned between the first overhanging portion 42 and the trimming machine main body 11 and the first overhanging portion 42 is in contact with the branch.

  Then, the branch can be cut by bringing the reciprocating saw 22 into contact with the branch. Since the saw 22 is a push saw, the branch can be cut by the saw 22 when the first cutting blade 16 operates in a direction away from the trimming machine body 11. Therefore, it is not necessary to prepare a special tool in addition to the trimming machine 10 in order to cut a thick branch or a hard branch. Further, it is not necessary to cut a thick branch or a hard branch in advance before performing the cutting operation by the trimming machine 10, and it is possible to avoid a reduction in work efficiency.

  In addition, the reaction force generated in the branch when the saw 22 pushes it off causes a force that pushes the saw 22 back toward the trimming machine body 11, but the branch is located between the guard plate 40 and the trimming machine body 11. Since the guard plate 40 is in contact with the branch, the blade assembly 12 can be prevented from being pushed in a direction approaching the trimming machine main body 11.

  Moreover, the 2nd shear blade 20 and the 4th shear blade 33 are arrange | positioned in the range B2 in the direction along the centerline A1, and are longer than the range B1. For this reason, even when the third cutting blade 23 is attached to the pedestal 21, if the cutting operation is performed by the second shearing blade 20 and the fourth shearing blade 33, it is possible to cut as wide a range as possible.

  On the other hand, as shown in FIGS. 6 and 7, the third cutting blade 23 can be attached to the base 21. According to this, when the first cutting blade 16 and the second cutting blade 17 reciprocate, the fifth shearing blade 29 of the third cutting blade 23 and the third shearing blade 32 of the second cutting blade 17. The object can be cut by the shearing force. In other words, in the state where the third cutting blade 23 is attached to the pedestal 21, in addition to being able to use the region of the range B1 with the first cutting blade 16, the fifth shearing blade 29 and the third shearing blade 32 By performing the cutting operation in cooperation with each other, the cutting operation can be performed in a range obtained by adding the range B3 of the fifth shear blade 29 to the range B1.

  In the trimming machine 10 in this embodiment, the screw member 24 that fixes the saw 22 or the third cutting blade 23 to the base 21 is a flat head screw, and the head of the screw member 24 is disposed in the hole. For this reason, when the 1st cutting blade 16 and the 2nd cutting blade 17 are reciprocated, the head of the screw member 24 and the 2nd cutting blade 17 do not rub. Therefore, wear and deformation of the second cutting blade 17 can be prevented, and power loss of the engine 13 can be suppressed.

  Furthermore, the guard plate 40 is provided with the first cutting blade 16 and the second cutting blade 17 when the operator tilts the cutting machine 10 and positions the guard plate 40 below the cutting machine main body 11. The saw 22 or the third cutting blade 23 is prevented from contacting an object, for example, the ground.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the embodiment of the present invention, the cutting machine is a cutting machine in which both the first cutting blade and the second cutting blade reciprocate, but the second cutting blade is a fixed blade fixed to the main body. It is good also as a trimming machine provided and only a 1st cutting blade reciprocates. In the latter case, the base 21 is provided on the first cutting blade, and the saw 22 or the third cutting blade 23 is provided on the first cutting blade, as in the present embodiment.

  The trimming machine of the present invention includes a trimming machine using an engine as a power source or a trimming machine using an electric motor as a power source. A trimming machine having an electric motor may have a battery pack attached thereto, or may be connected to a power source at a location away from the trimming machine by a power cable. The trimming machine of the present invention includes a trimming machine that includes an engine and an electric motor, and includes a clutch mechanism that transmits at least one of the power of the engine or the electric motor to a drive shaft. The saw attached to the pedestal includes, in addition to the above-described push saw, a saw saw that cuts an object when the saw operates in a direction approaching the trimming machine main body.

  Further, the position where the pedestal is provided in the longitudinal direction of the first cutting blade may be the end of the trimming machine main body. Further, the position where the pedestal is provided in the longitudinal direction of the first cutting blade may be an intermediate position between the trimming machine main body and the guard plate. Furthermore, the saw is provided integrally with the first cutting blade, and includes a structure in which the saw cannot be detached from the first cutting blade.

  In the embodiment, the blade assembly is provided with a long hole at the base end portion of the first cutting blade and the second cutting blade. A main body side guide, that is, an eccentric cam is disposed in the long hole, and the first cutting blade and the second cutting blade are reciprocated by the rotation of the guide. As another structure of the blade assembly, a connecting pin is provided at the base end of the first cutting blade and the second cutting blade, one end is connected to the connecting pin, and the other end is connected to a guide. Is also possible. With this structure, the connecting rod moves in the length direction by the rotation of the guide, and the first cutting blade and the second cutting blade reciprocate.

  The correspondence between the configuration described in the embodiment and the configuration of the present invention will be described. The engine 13 and the electric motor correspond to the power source of the present invention, and the pitch between the shearing blades is the cutting blades in the present invention. The elements such as the driven gear 48, the guides 50 and 52, the guide holes 51 and 53, and the support shaft 49 correspond to the power conversion mechanism of the present invention, and the direction along the center line A1 is the present invention. This corresponds to the predetermined direction.

  DESCRIPTION OF SYMBOLS 10 ... Mowing machine, 13 ... Engine, 16 ... 1st cutting blade, 17 ... 2nd cutting blade, 19 ... 1st shearing blade, 20 ... 2nd shearing blade, 21 ... Base, 22 ... Saw, 23 ... 1st 3 cutting blades, 27 ... cutting blades, 29 ... fifth shearing blades, 32 ... third shearing blades, 33 ... fourth shearing blades, 48 ... driven gears, 50, 52 ... guides, 51, 53 ... guide holes, 49 ... support shaft, A1 ... center line, L1, L2 ... projection amount, B1, B2 ... range.

Claims (8)

A first cutting blade and a second cutting blade are provided, and at least the first cutting blade is reciprocated in a predetermined direction by the power of a power source, and shearing between the first cutting blade and the second cutting blade is performed. A mower that cuts an object with force,
A plurality of first shearing blades spaced from each other on a first side edge of the first cutting blade along the predetermined direction;
A plurality of second shearing blades spaced from each other on the second side edge of the first cutting blade along the predetermined direction;
A plurality of third blades provided on the first side edges of the second cutting blade along the predetermined direction and spaced apart from each other and cutting an object in cooperation with the plurality of first shearing blades. A shear blade,
A plurality of fourth cutting edges provided on the second side edges of the second cutting blade along the predetermined direction and spaced apart from each other and cutting the object in cooperation with the plurality of second shearing blades. A shear blade,
A saw provided on the first side edge of the first cutting blade and cutting the object alone;
Have
The saw includes a plurality of cutting blades arranged along the predetermined direction,
The range in which the plurality of second shearing blades are provided in the predetermined direction is wider than the range in which the plurality of first shearing blades are provided in the predetermined direction, and the plurality of cutting blades are in the predetermined direction. A trimming machine that includes the area where it is placed.   The cutting machine according to claim 1, wherein an interval between the plurality of cutting blades is narrower than an interval between the plurality of first shear blades. One end of the first cutting blade in the predetermined direction is connected to the power source so that power can be transmitted,
The cutting machine according to claim 1 or 2, wherein the saw is provided at the other end of the first cutting blade in the predetermined direction.   The cutting machine according to any one of claims 1 to 3, wherein the saw is detachable from the first cutting blade. A third cutting blade that is detachable from the first cutting blade is provided, and the third cutting blade has a plurality of fifth shearing blades that are provided at intervals in the predetermined direction,
The trimming machine according to claim 4, wherein the plurality of fifth shearing blades cut an object in cooperation with the plurality of third shearing blades.   The protrusion amount of the plurality of cutting blades with respect to the center line in the predetermined direction of the first cutting blade is larger than the protrusion amount of the plurality of third shear blades with respect to the center line. Trimming machine.   The cutting machine according to claim 1, wherein the saw is provided integrally with the first cutting blade. A trimming machine body provided with the power source;
A support member that is provided in the trimming machine body and supports the first cutting blade and the second cutting blade so as to be capable of reciprocating separately;
A power conversion mechanism that transmits the power of the power source to the first cutting blade and the second cutting blade to separately reciprocate the first cutting blade and the second cutting blade;
With
The said 1st cutting blade is a cutting machine of any one of Claims 1-7 arrange | positioned between the said supporting member and the said 2nd cutting blade.

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