JP5989463B2 - Gardening hair clipper - Google Patents

Description

  The present invention relates to a gardening hair clipper such as a hedge trimmer and a lawn mower.

  Patent Document 1 discloses a hedge trimmer that is a horticultural clipper of this type. The hedge trimmer disclosed in Patent Document 1 includes a blade assembly that is detachably attached to the bottom of a housing with a built-in electric motor, and a U-shaped handle that is turned upside down and protrudes upward at the front of the housing. And. In this hedge trimmer, the blade assembly has a pair of shear blades held slidably in the front-rear direction by a pair of upper and lower guide plates, and an electric motor operates in a fitting hole at the base end of the pair of shear blades. Thus, the eccentric cam of the crank cam rotating eccentrically is fitted. The pair of shear blades reciprocate relatively in the front-rear direction by a crank cam that rotates eccentrically by the operation of the electric motor.

  In this hedge trimmer, when the blade portions of the pair of shear blades are worn, it is necessary to replace the blade assembly. When replacing the blade assembly, place the hedge trimmer upside down on a horizontal work surface and remove it by loosening the screw with the other hand while supporting the blade assembly attached to the bottom of the housing with one hand. Similarly, the new blade assembly is mounted by holding it with one hand and tightening the screw with the other hand.

  In a state where the hedge trimmer is placed upside down on a horizontal work table, the top part on the rear side of the electric motor of the housing and the top part of the annular handle are grounded on the work table. Yes. However, the hedge trimmer was not stable in the lateral direction only by contacting the two points in the front-rear direction of the top of the housing and the top of the annular handle on the work table. For this reason, unless other workers support the hedge trimmer with the upside-down direction reversed or use a special support that stably supports the hedge trimmer with the upside-down direction reversed, the housing It was difficult to attach and detach the blade assembly to the bottom.

JP 2010-094086 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a gardening hair clipper that can be stably placed when the gardening hair clipper is turned upside down in order to cope with the above-described problems, and that facilitates attachment and detachment of the blade assembly.

  In order to solve the above-described problems, the present invention includes a blade assembly that is detachably attached to the bottom of a housing containing a prime mover, and a handle that protrudes upward at the front of the housing and is gripped by an operator. A horticultural hair clipper with the horticultural hair clipper placed upside down on a horizontal support surface, with the housing grounding part grounded to the support surface behind the prime mover and the handle A horticultural hair clipper comprising a handle grounding portion for grounding to a support surface on the front side of a prime mover, and having at least two grounding points spaced apart from each other in a direction intersecting the front-rear direction on the handle grounding portion. Is.

  In the gardening hair clipper configured as described above, the gardening hair clipper is separated from the housing grounding part and the housing grounding part in the front-rear direction with the gardening hair clipper placed on a horizontal support surface in the upside down direction. At least three points of at least two contact points separated from each other in the direction crossing the front-rear direction of the handle grounding unit are grounded to the support surface. The gardening hair clipper is disposed in a region surrounded by at least two grounding points, which are a heavy load motor, that is, a housing grounding part on the rear side and a grounding part on the front side. As a result, the gardening hair clipper can be stably placed on a horizontal support surface in the upside down direction, and the blade assembly can be easily attached and detached.

It is a side view of one Embodiment of the hedge trimmer which is the gardening hair clipper of this invention. FIG. 2 is a perspective view of FIG. 1. It is sectional drawing along the front-back direction of FIG. It is the perspective view which decomposed | disassembled the crank mechanism of FIG. FIG. 3 is a perspective view of a blade assembly. It is a side view when putting the hedge trimmer of FIG. 1 upside down. It is the figure which looked at the hedge trimmer which put the up-and-down direction of FIG. 6 in the reverse direction from the upper side. It is the schematic which shows the position of the electric motor when it earth | grounds with a housing grounding part and a handle | steering-wheel grounding part.

  Hereinafter, an embodiment of a hedge trimmer which is a gardening hair clipper of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1 to 3, the hedge trimmer 10 protrudes upward at the front portion of the housing 11 and the blade assembly 40 detachably attached to the bottom of the housing 11 containing the electric motor (primary motor) 21. And a handle 14 held by an operator. In the hedge trimmer 10, the housing 11 has a housing grounding portion 12 b that is grounded to the support surface G on the rear side of the electric motor 21 in a state where the hedge trimmer 10 is placed on the horizontal support surface G with the upside down direction. The handle 14 is provided with a handle grounding portion 14a that is grounded to the support surface G on the front side of the electric motor 21, and the handle grounding portion 14a is provided with a grounding surface 14b that extends in a direction crossing the front-rear direction.

  As shown in FIGS. 1 to 3, the housing 11 of the hedge trimmer 10 includes an outer shell housing 12 and an inner shell housing 13. Inside the outer shell housing 12, an inner shell housing 13 incorporating a cooling fan 22 and a crank mechanism 30 is assembled together with the electric motor 21. The outer shell housing 12 is integrally formed with a grip 12a that an operator holds with one hand at the rear, and a handle 14 that the operator holds with the other hand is attached to the front. The outer shell housing 12 is provided with a housing grounding portion 12b that is grounded to the support surface G on the rear side of the electric motor 21 in a state where the hedge trimmer 10 is placed upright on the horizontal support surface G. It has been. The housing grounding portion 12b is a protrusion extending in a direction orthogonal (crossing) to the front-rear direction.

  The handle 14 has a U-shape that is upside down and protrudes upward from the left and right sides of the front portion of the outer shell housing 12. A rubber material is attached to the outer periphery of the handle 14 as a material that has a large friction coefficient and is difficult to slip. At the upper part of the handle 14, a handle grounding portion 14 a for grounding the support surface G on the front side of the electric motor 21 is provided in a state where the hedge trimmer 10 is placed upright on the horizontal support surface G. ing. The handle grounding portion 14a is provided with a grounding surface 14b extending in a direction orthogonal to (crossing) the front-rear direction. The ground plane 14b has a large number of ground points that are continuous in a direction orthogonal (crossing) to the front-rear direction. A tip guard 15 is fixed to the front part of the outer shell housing 12 on the front side of the handle 14, and the tip guard 15 prevents the cut branches and leaves from scattering toward the operator.

  As shown in FIG. 3, the inner shell housing 13 houses a cooling fan 22 and a crank mechanism 30 together with the electric motor 21. The electric motor 21 is provided upright in the inner shell housing 13. A cooling fan 22 is attached to the drive shaft 21 a of the electric motor 21. The cooling fan 22 cools the electric motor 21 by allowing air to pass around the electric motor 21 by rotation of the electric motor 21.

  As shown in FIGS. 3 and 4, the crank mechanism 30 converts the rotational drive of the electric motor 21 into the relative reciprocation of the pair of shear blades 41 and 42 in the front-rear direction (longitudinal direction). It is provided at the bottom of the inner shell housing 13. The crank mechanism 30 includes a reduction gear 31 that engages with the pinion gear 21 b at the tip of the drive shaft 21 a of the electric motor 21, and a crank cam 32 that is connected to the lower side of the reduction gear 31.

  The reduction gear 31 is detachably and rotatably supported on a rotation shaft 31a provided at the center of rotation. A tooth portion that engages with the pinion gear 21 b at the tip of the drive shaft 21 a of the electric motor 21 is formed on the outer periphery of the reduction gear 31.

  As shown in FIGS. 3 and 4, the crank cam 32 is a unit in which eccentric cams 33 and 34 made of two disks of the same size are stacked and fixed together. The eccentric cams 33 and 34 of the crank cam 32 are arranged so as to face each other across the rotation shaft 31a of the reduction gear 31, that is, to have a phase difference of 180 °. On the upper surface of the crank cam 32, connecting pins 35, 35 are provided so as to project upward on a line passing through the intersection of both eccentric cams 33, 34. The crank cam 32 has the connecting pins 35, 35 on the lower surface of the reduction gear 31. The formed connection holes 31b and 31b are detachably inserted and connected. In addition, between the connecting pins 35 and 35 of the crank cam 32 and the connecting holes 31b and 31b of the reduction gear 31, cylindrical bushes 36 and 36 made of a flexible elastic member that suppresses transmission of vibration, Cylindrical metal stoppers 37, 37 that prevent breakage of 36 are interposed.

  As shown in FIGS. 3 to 5, a blade assembly 40 is detachably attached to the bottom of the inner shell housing 13. The blade assembly 40 includes a pair of shear blades 41, 42 that overlap each other, guide plates 43, 44 that hold the pair of shear blades 41, 42 slidable in the front-rear direction from both upper and lower sides, and a shear blade And a spacer 45 that holds the base end portions of 41 and 42 at a predetermined interval.

  The pair of shear blades 41, 42 extend long in front of the housing 11, and the shear blades 41, 42 have a plurality of blade portions formed in a comb shape on both sides in the longitudinal direction. At the base ends of the shear blades 41, 42, fitting holes 41a, 42a that are long in the lateral direction are formed by connecting two semicircles having the same radius by a straight line (in the shape of a track for athletics). The fitting holes 41a and 42a have the same size, and the fitting holes 41a and 42a are sized so that the eccentric cams 33 and 34 can be fitted in the front-rear direction without a gap. The eccentric cams 33 and 34 of the crank cam 32 are fitted in the fitting holes 41a and 42a so as to be slidable along the longitudinal direction.

  As shown in FIG. 5, the lower guide plate 44 holds the pair of shear blades 41 and 42 together with the upper guide plate 43 so as to be slidable in the front-rear direction from both upper and lower sides. The lower guide plate 44 is detachably fixed to each corner of the bottom portion of the inner shell housing 13 by screws 46 so that the base end portion covers the bottom surface of the inner shell housing 13 housing the crank mechanism 30.

  The operation of the hedge trimmer 10 configured as described above will be described. In the hedge trimmer 10, when the electric motor 21 is operated, the pair of shear blades 41 and 42 reciprocate in the front-rear direction and in the opposite directions via the crank mechanism 30. More specifically, when the electric motor 21 is rotationally driven, the reduction gear 31 engaged with the pinion gear 21b at the tip of the drive shaft 21a rotates, and the eccentric cams 33 and 34 of the crank cam 32 connected to the reduction gear 31 are 180 with respect to each other. It rotates eccentrically with respect to the rotating shaft 31a with a phase difference of °. The eccentric cams 33 and 34 of the crank cam 32 that rotates eccentrically slide along the longitudinal direction in the fitting holes 41a and 42a of the base end portions of the shear blades 41 and 42, and a pair of shear blades 41 and 42 Are reciprocated in the opposite directions in the front-rear direction. By holding the grip 12a and the handle 14 and applying shear blades 41, 42 reciprocating in opposite directions to a cutting surface such as a hedge, branches and leaves such as the hedge are cut by the blade portion of the shear blade 41, 42. .

  Next, the attaching / detaching operation of the blade assembly 40 of the hedge trimmer 10 configured as described above will be described. First, when removing the blade assembly 40 from the bottom of the inner shell housing 13, the hedge trimmer 10 is placed upside down on the support surface G of the horizontal work table with the blade assembly 40 lightly supported by one hand. Put. In the hedge trimmer 10, the housing grounding portion 12b of the outer shell housing 12 and the handle grounding portion 14a of the handle 14 are grounded to the support surface G.

  The hedge trimmer 10 includes a housing grounding portion 12b made of a protrusion extending in a direction orthogonal to the front-rear direction, and a grounding surface 14b extending in a direction orthogonal to the front-rear direction spaced from the housing grounding portion 12b in the front-rear direction. The handle grounding portion 14a is grounded to the support surface G and can be stably placed not only in the front-rear direction but also in the lateral direction. Further, as shown in the schematic diagram of FIG. 8A, in the hedge trimmer 10, the heavy electric motor 21 is surrounded by the housing grounding portion 12b and the handle grounding portion 14a when viewed from above. Since it is arranged in the region, the hedge trimmer 10 can be stably placed on the horizontal support surface G with the top and bottom reversed.

  At this time, the operator can stably place the hedge trimmer 10 in the front-rear and the lateral directions with the other hand only by lightly supporting the blade assembly 40 with one hand. The screw 46 used to fix the blade assembly 40 can be loosened with the tool, and the blade assembly 40 can be easily removed from the inner shell housing 13. In particular, as shown in FIG. 6, the screw 46 that fixes the blade assembly 40 to the housing 11 is disposed in the region between the front side of the housing grounding portion 12b and the rear side of the handle grounding portion 14a. Even if the screws 46 are loosened, the hedge trimmer 10 is stable and difficult to fall. Thus, other workers do not support the hedge trimmer 10 upside down, and without using a special support that prevents the hedge trimmer 10 from tilting laterally when the hedge trimmer 10 is upside down. The blade assembly 40 can be easily removed from the inner shell housing 13.

  Subsequently, when the new blade assembly 40 is attached to the bottom of the inner shell housing 13, the crank cam 32 provided at the bottom of the inner shell housing 13 in the fitting holes 41 a and 42 a of the pair of shear blades 41 and 42 of the new blade assembly 40. And the lower guide plate 44 of the new blade assembly 40 is attached to the bottom of the inner shell housing 13 with screws 46.

  At this time, the operator can stably place the hedge trimmer 10 in the front-rear and the lateral directions with the other hand only by lightly supporting the blade assembly 40 with one hand. The screw 46 used for fixing the blade assembly 40 is tightened by the tool of the above, and the blade assembly 40 can be easily attached to the inner shell housing 13. In particular, as shown in FIG. 6, each screw 46 fixing the blade assembly 40 to the housing 11 is arranged in a region between the front side of the housing grounding portion 12b and the rear side of the handle grounding portion 14a. Even if the screw 46 is tightened by applying force, the hedge trimmer 10 is stable and difficult to fall. Thus, a special support is used so that other workers do not support the hedge trimmer 10 with the top and bottom reversed, and do not tilt laterally when the hedge trimmer 10 is placed upside down. The blade assembly 40 can be easily attached to the inner shell housing 13.

  In the hedge trimmer 10, a rubber material is attached to the outer periphery of the handle 14 as a material having a large friction coefficient and not slipping, including the handle grounding portion 14a. When the screw 46 is loosened or tightened while being pushed downward by a tool such as a screwdriver, the handle grounding portion 14a is less likely to move on the support surface G by a rubber material having a large friction coefficient and not slippery, and the blade assembly 40 can be easily attached and detached. It became. A rubber material may be used as a material for the housing grounding portion 12b together with the handle grounding portion 14a as a material having a large friction coefficient and less slipping. May be used.

  In this embodiment, when the hedge trimmer 10 is placed upside down, the housing grounding portion 12b and the handle grounding portion 14a grounded separately from the housing grounding portion 12b in the front-rear direction are provided on the support surface G. Grounded. The handle grounding portion 14a is provided with a grounding surface 14b extending in a direction perpendicular to the front-rear direction and having a continuous grounding point. The handle 14 has a substantially M shape with the handle upside down, and FIG. As shown in the schematic diagram, the handle grounding portion 14a may be provided with two grounding points 14c and 14c that are separated from each other in a direction orthogonal (crossing) to the front-rear direction. In addition, the upper part of the handle | steering-wheel 14 may provide many grounding points spaced apart from each other in the direction orthogonal (cross | intersect) with the front-back direction by making it a waveform.

  In the present embodiment, the housing grounding portion 12 b is a protrusion that extends in a direction perpendicular to the front-rear direction at the top of the outer shell housing 12. The present invention is not limited to this, and the housing grounding portion 12b may be, for example, an elliptical flat portion that extends in a direction orthogonal to (crosses) the front-rear direction and contacts the support surface G. Similarly, as shown in the schematic diagram of FIG. 8C, the housing grounding portion 12b may be provided with two grounding points 12c that are separated from each other in a direction orthogonal (crossing) the front-rear direction.

  Further, instead of the housing grounding portion 12b formed of a protrusion extending in a direction perpendicular to the front-rear direction at the top of the outer shell housing 12, a protrusion is formed as shown in the schematic diagram of FIG. Even when the top portion 12d of the outer shell housing 12 made of a curved surface that is lowered in the front-rear direction and in the lateral direction is used as the housing grounding portion, the handle grounding provided apart from the front-rear direction is slightly less stable. Together with the portion 14a, the hedge trimmer 10 can be stably placed upside down.

  The present invention is not limited to the one shown in FIGS. 8A to 8D, but also to an appropriate combination of the housing grounding portion 12b and the handle grounding portion 14a shown in FIGS. 8A to 8D. Applied.

  Although the above-described embodiment has been described with respect to the hedge trimmer that cuts the branches and leaves of the hedge, the gardening hair clipper of the present invention is also applied to a lawnmower hair clipper in which a pair of shear blades reciprocate in the left-right direction via a crank mechanism.

  In the above-described embodiment, the two eccentric cams of the crank mechanism are fitted in the fitting holes of the pair of upper and lower shear blades so that both the shear blades are reciprocated relatively in the front-rear direction. However, the present invention is not limited to this. One shear blade is fixed, and only one shear blade is fitted by fitting one eccentric cam of the crank mechanism into the fitting hole of the other shear blade. Is also applied to a hedge trimmer driven by a single blade that relatively reciprocates in the front-rear direction.

 DESCRIPTION OF SYMBOLS 10 ... Hedge trimmer, 11 ... Housing, 12b ... Housing grounding part, 14 ... Handle, 14a ... Handle grounding part, 14b ... Grounding surface, 40 ... Blade assembly.

Claims (4)

A gardening clipper comprising a blade assembly that is detachably attached to the bottom of a housing containing a prime mover, and a handle that protrudes upward at the front of the housing and is gripped by an operator,
In the state where the gardening hair clipper is placed on a horizontal support surface upside down, the housing has a housing grounding portion that contacts the support surface behind the prime mover, and the handle has the prime mover. A horticultural hair clipper comprising a handle grounding portion for grounding to the support surface on the front side of the handle, and provided with at least two grounding points spaced apart from each other in a direction intersecting the front-rear direction.   The gardening hair clipper according to claim 1, wherein the handle grounding portion is a grounding surface extending in a direction crossing the front-rear direction.   The gardening hair clipper according to claim 1 or 2, wherein the housing grounding portion is a protrusion extending in a direction intersecting with the front-rear direction. The horticultural hair clipper according to any one of claims 1 to 3, wherein a material having a large friction coefficient and not slipping is used for at least one of the housing grounding portion and the handle grounding portion.

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