JP2016189706A - Hand-held type lawn mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand-held type lawn mower that simultaneously makes it possible to prevent breakage of a cutting part and collect grass chips, and can make a trim height as low as possible.SOLUTION: A hand-held type lawn mower comprises: a body housing 2; a drive mechanism part 3 which is built in the body housing 2; a cutting part 4 which is positioned in outer front of the body housing 2, driven by drive power of the drive mechanism part 3, and cuts an object to be cut off such as lawn; and an edge-trimming guide 5 which is positioned below the body housing 2, in which the edge-trimming guide 5 comprises: a guard part 52 which is positioned below the cutting part 4; and a grass-collecting part which is continuously provided backward from the guard part 52.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a handheld lawn mower for a user to carry out lawn mowing in a garden.

  Conventionally, a hand-held lawn mower that can be easily used for mowing a garden or the like is known. Various proposals have been made on the configuration of this type of hand-held lawn mower (see, for example, Patent Documents 1 and 2).

  Patent Document 1 describes a hand-held lawn mower in which a comb-like guard portion is installed below the cutting portion in order to prevent the cutting portion from being damaged due to contact with a wall or garden stone during lawn mowing work. ing. Patent Document 2 describes a hand-held lawn mower in which a receiver for collecting chips is installed below the cutting unit in order to reduce the burden when cleaning chips generated by lawn mowing work. Yes.

JP 2008-22775 A JP 2004-41140 A

  In order to make it possible to simultaneously prevent damage to the cutting part and collect grass chips, a handheld lawn mower provided with a guard part as described in Patent Document 1 is provided with a receiver as described in Patent Document 2. It is conceivable to install. In this case, a configuration is conceivable in which the receiver is arranged so as to overlap further below the guard portion. However, when the lawn mowing operation is performed using the handheld lawn mower having this configuration, the guard part and the receiver are arranged below the cutting part so that the cutting part is separated upward from the ground to some extent. Therefore, when it is desired to reduce the grass cutting height as much as possible, the configuration is unsuitable.

  The present invention has been made in view of the above-described problems, and the object thereof is a hand-held lawn mower that can simultaneously prevent damage to the cutting portion and collect grass, and can reduce the cutting height as much as possible. Is to provide a machine.

  A hand-held lawn mower according to the present invention includes a main body housing, a drive mechanism portion built in the main body housing, and an external front side of the main body housing, and is driven by the driving force of the drive mechanism portion, such as lawn. A handheld lawn mower comprising a cutting part for cutting an object to be cut, and a kiwa cutting guide disposed below the main body housing, wherein the kiwa cutting guide is a guard part located below the cutting part And a grass collecting part provided continuously from the guard part toward the rear.

  Further, in the handheld lawn mower according to the present invention, the grass collecting portion includes a bottom plate formed at a lower portion of the kiwa mowing guide, a rear wall formed at the rear portion, a side wall formed at the side portion, The main body housing can be defined.

  Furthermore, in the handheld lawn mower according to the present invention, the side wall is formed to extend in the front-rear direction, and is configured to form a side surface of the guard portion on an extension line of the side wall in plan view. be able to.

  Still further, in the handheld lawn mower according to the present invention, the kiwa-cutting guide can be detachably attached to the main body housing.

  According to the present invention, it is possible to provide a hand-held lawn mower that can simultaneously prevent damage to the cutting portion and collect chips, and reduce the height of trimming as much as possible.

It is a perspective view of the plane side which shows the handheld lawn mower which concerns on embodiment of this invention. It is a perspective view of the bottom side which shows the handheld lawn mower which concerns on embodiment of this invention. It is a top view which shows the handheld lawn mower which concerns on embodiment of this invention. It is a side view which shows the handheld lawn mower which concerns on embodiment of this invention. It is a figure which shows the wrinkle cutting guide which concerns on embodiment of this invention, (a) is a top view, (b) is AA sectional drawing in (a). It is a side view explaining the lawn mowing work using the handheld lawn mower according to the embodiment of the present invention, (a) lawn mowing work in the vicinity of the wall, (b) in the vicinity of the curb. Shows mowing work. It is a top view explaining the lawn mowing operation | work using the handheld lawn mower which concerns on embodiment of this invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

  First, the basic structure of a handheld lawn mower according to an embodiment of the present invention will be described with reference to FIGS.

  Here, FIG. 1 is a plan perspective view showing a handheld lawn mower according to an embodiment of the present invention, and FIG. 2 is a bottom perspective view showing a handheld lawn mower according to an embodiment of the present invention. . FIG. 3 is a plan view showing the handheld lawn mower according to the embodiment of the present invention, and FIG. 4 is a side view showing the handheld lawn mower according to the embodiment of the present invention. FIGS. 5A and 5B are diagrams showing a kneading guide according to the embodiment of the present invention, in which FIG. 5A is a plan view and FIG. 5B is a cross-sectional view taken along line AA in FIG. Further, in the present specification, as shown in the drawing, “front, rear, left, right, upper, lower” are defined and described.

  As shown in FIGS. 1 to 4, the handheld lawn mower 1 according to the embodiment of the present invention is positioned in front of the main body housing 2, the drive mechanism 3 built in the main body housing 2, and the main body housing 2. And a cutting portion 4 for cutting, and further a kneading guide 5 adjacent to the cutting portion 4.

  The main body housing 2 is configured by combining a plurality of members made of synthetic resin, and has a space in which various devices can be incorporated. A grip portion 21 is formed at the upper rear portion of the main body housing 2. The user grasps the grip portion 21 and performs lawn mowing work. An operation switch 22 is provided on the front lower surface of the grip portion 21, and the user can drive the cutting portion 4 by turning on the operation switch 22 while gripping the grip portion 21. Note that a safety switch 23 is provided on the side surface of the grip portion 21 so that the operation switch 22 cannot be turned on unless the safety switch 23 is pushed into the grip portion 21.

  Although not specifically shown, the drive mechanism 3 is located inside the main body housing 2. Examples of the drive mechanism unit 3 include a motor that is a source of driving force, and a transmission mechanism such as a transmission shaft and a cam that transmit the driving force to the cutting unit 4. The driving force generation source of the present embodiment is a rotary motor, but various driving force generation means such as an electromagnet or a linear motor can be used. A power cord 24 extends from the rear end of the main body housing 2. The power cord 24 is connected to a commercial power source to supply power to the drive mechanism unit 3. By using a dry battery or a rechargeable battery, the battery can be used without being connected to a commercial power source.

  The cutting portion 4 has a flat plate shape, and the upper blade 4a is a comb shape whose front portion is open forward, and the lower blade 4b is a flat blade which is also flat and has a front portion shape opened forward. And the upper blade 4a and the lower blade 4b are connected to each other by a pin (not shown) inside the main body housing 2. The upper blade 4a and the lower blade 4b are comb-shaped portions formed in front of the upper blade base 41a, the lower blade base 41b, the upper blade base 41a, and the lower blade base 41b, which are partially inserted into the main body housing 2. The upper blade cutting blade portion 42a for cutting the turf G and the lower blade cutting blade portion 42b are provided. As shown in FIG. 3, the width direction (left-right direction) dimension of the lower blade 4b is larger than that of the upper blade 4a.

  Due to the driving force of the drive mechanism 3, the upper blade 4a and the lower blade 4b reciprocate (oscillate) in the left-right direction of the hand-held lawn mower 1 (the direction M indicated by the arrow in FIG. 3) with the pin as the rotation center. Move). In the reciprocation, the driving force is transmitted from the drive mechanism unit 3 so that the phase of the upper blade 4a and the phase of the lower blade 4b are shifted by 180 degrees. If it does so, the upper blade cutting blade part 42a and the lower blade cutting blade part 42b will cross | intersect repeatedly by the said reciprocation. Thereby, the turf G as a cutting object located between the upper blade cutting blade portion 42a and the lower blade cutting blade portion 42b is cut by shearing.

  Engaging convex portions 25 are formed on both side surfaces in the width direction (left-right direction) of the main body housing 2 as shown in FIG. Engaging recesses 533 of a wrinkle cutting guide 5 described later are engaged with the engaging projections 25.

  Of the bottom portion 26 of the main body housing 2, both front ends in the width direction have horizontal surfaces 26 a. The user can move the handheld lawn mower 1 parallel to the ground so that the horizontal surface 26a is along the ground. As shown in FIGS. 2 and 4, the rear portion of the bottom portion 26 has a shape that goes upward as it goes rearward. Even when the horizontal surface 26a is moved along the ground as described above, The rear part does not touch the ground.

  A bottom recess 261 is formed in the center in the width direction of the bottom 26 and is recessed above the horizontal surface 26a. A tongue-like portion 54 of a kneading guide 5 described later engages with the bottom recess 261.

  The wrinkle cutting guide 5 has the shape shown in FIGS. 5A and 5B, and has a base 51 attached to the main body housing 2 and a comb-like guard portion 52 protruding forward from the base 51 so as to be integrated. It is made of resin. As shown in FIG. 1 and the like, the base 51 is positioned so as to surround a front side portion of the front surface and the side surface of the main body housing 2 in a state of being attached to the main body housing 2. The base 51 has a bottom plate 511 on a flat plate formed on the lower front side as a horizontal plane, and a tongue-like portion 54 protruding rearward from the bottom plate 511 at the center in the width direction (left-right direction). The bottom plate 511 includes a central bottom plate 512 formed at the center in the width direction, and side bottom plates 513 provided continuously on both sides of the central bottom plate 512. A rear wall 53 is continuously provided behind the side bottom plate 513. The rear wall 53 is formed as an inclined wall that is inclined upward toward the rear. The rear wall 53 is connected to the rear of the side bottom plate 513 and connected to the rear of the first rear wall 531. And a second rear wall 532 inclined further upward than the first rear wall 531. A horizontal end portion 56 formed in a horizontal plane is continuously provided behind the second rear wall 532. On the center side of the boundary between the first rear wall 531 and the second rear wall 532, an engagement recess 533 is formed to open downward. Side walls 57 having the same height as the horizontal end portion 56 are formed on both sides of the base portion 51 between the side bottom plate 513 and the second rear wall 532 so as to extend in the front-rear direction. The side wall 57 is formed on substantially the same line as a side surface (a side surface 521b described later) of the guard portion 52 in a plan view.

  The kneading guide 5 is attached to the main body housing 2 by engaging the tongue-like portion 54 of the wrinkle cutting guide 5 with the bottom recess 261 of the main body housing 2 and the wrinkle cutting guide 5 with the engaging convex portion 25 of the main body housing 2. This is achieved by engaging the engaging recess 533. Further, when removing, the horizontal end portion 56 is pushed upward to release the engagement concave portion 533 from the engagement convex portion 25, and the kneading guide 5 is pushed forward to the bottom concave portion 261. This is achieved by releasing the engagement of the tongue 54. Thus, the kneading guide 5 of this embodiment is detachable from the main body housing 2. Therefore, even when the kneading guide 5 is worn or damaged due to various causes, it is economical because only the kneading guide 5 can be easily replaced.

  The guard portion 52 of the wrinkle cutting guide 5 has a plurality of protruding portions 521 that protrude horizontally from the front edge portion 514 of the bottom plate 511 formed in a convex arc shape forward in a plan view, and is formed in a comb shape. Has been. Further, the plurality of projecting portions 521 are arranged so as to be substantially parallel to each other. In a state where the kneading guide 5 is attached to the main body housing 2, the guard portion 52 is positioned below the lower blade cutting blade portion 42 b of the cutting portion 4. The tip of each protrusion 521 and the side surface 521b of the outermost protrusion 521 in the left-right direction of the guard 52 are located further outside the movable range of the cutting part 4, that is, the reciprocating range of the cutting part 4 in plan view. To do.

  On the upper surface of the front edge portion 514 of the bottom plate 511, a plurality of protrusions 55 are formed to protrude upward. The protrusion 55 is located below the lower blade base 41b of the cutting portion 4 and comes into contact with the lower surface of the lower blade base 41b when the guard portion 52 of the wrinkle cutting guide 5 is moved upward by an external force. The amount of upward movement of the guard 52 is restricted. Thereby, it can prevent that the protrusion part 521 of the guard part 52 is scraped by the lower blade cutting blade part 42b of the cutting part 4. FIG.

  Next, lawn mowing work using the handheld lawn mower 1 having the above-described configuration will be described with reference to FIGS. 6 and 7. Here, FIG. 6 is a side view for explaining the lawn mowing work using the handheld lawn mower according to the embodiment of the present invention. FIG. 6 (a) shows the lawn mowing work near the wall. Shows mowing work near the curb. FIG. 7 is a plan view for explaining lawn mowing work using the handheld lawn mower according to the embodiment of the present invention.

  When the lawn mowing operation is performed using the hand-held lawn mower 1 having the above-described configuration, the horizontal surface 26a of the bottom part 26 of the main body housing 2 is grounded to the ground Z, and the safety switch 23 is used with fingers that hold the grip part 21. In a state where the operation switch 22 is operated, the turf is cut by the cutting unit 4 while being moved along the ground Z. At this time, for example, in the case of performing lawn mowing work in the vicinity of the wall W as shown in FIG. 6A, when the handheld lawn mower 1 is applied to the wall W, the cutting portion 4 hits the wall W. The wrinkle cutting guide 5 hits the wall W without any problem. Thereby, it can prevent that the cutting part 4 (especially the upper blade cutting blade part 42a and the lower blade cutting blade part 42b) is damaged. Further, it is possible to avoid damaging the wall W by the cutting section 4 being driven. Therefore, even when mowing the lawn at a position close to the wall W, the work can be performed with peace of mind. In particular, the guard 52 is cut even when mowing near the curb X or garden stone, which has a small protrusion height from the ground as shown in FIG. By arrange | positioning under the part 4, it can prevent that the cutting part 4 contacts the curb stone X and the garden stone, and is damaged.

  Further, when the lawn mowing operation is performed using the hand-held lawn mower 1 having the above-described configuration, the bottom plate of the kiwa mowing guide 5 serving as a grass collecting part is not all of the chips generated by the cutting of the cutting part 4. 511, the rear wall 53, the side wall 57, and the front and side surfaces of the main body housing 2 can be integrated. And periodically, the chips remaining on the ground can be reduced by throwing away the chips accumulated in the grass collecting section into a garbage bag or the like. Therefore, it is possible to reduce the burden of chip cleaning work after mowing.

  Furthermore, in the hand-held lawn mower 1 having the above-described configuration, the bottom plate 511, the rear wall 53, and the side wall 57 of the kiwa cutting guide 5 constituting the grass collecting portion are integrated behind the guard portion 52 that protects the cutting portion 4. Therefore, it is possible to configure the trimming height to be smaller as compared with the case where the member functioning as the grass collecting portion is provided below the guard portion as a separate part. Therefore, it is possible to realize a configuration that meets the desire to reduce the cutting height as much as possible. Furthermore, it can be manufactured inexpensively by reducing the number of parts.

  Furthermore, when the lawn mowing operation is performed while moving forward along the wall W using the handheld lawn mower 1 having the above-described configuration, the side wall 57 and the guard portion 52 are By forming the side surface 521b on substantially the same line in a plan view, the wrinkle cutting guide 5 can be placed (slidably contacted) with the wall W in a long range in the front and rear direction. Therefore, it is possible to stably perform lawn mowing work near the wall.

  The preferred embodiments for carrying out the present invention have been described above. However, the handheld lawn mower according to the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. It can be changed.

  For example, the turf G is cited as an object to be cut by the cutting unit 4 in the above embodiment, but this is only an example, and is a grass, a plant, a vegetable, a moss, a mushroom, a wooden rod, a resin rod, or the like. It can be applied to various objects protruding from a predetermined surface such as the ground.

  Further, in the handheld lawn mower 1 of the above embodiment, the plurality of protruding portions 521 of the guard portion 52 are disposed so as to be substantially parallel to each other, but are not limited thereto. For example, the plurality of projecting portions may be arranged so as to extend radially in the radial direction of the front edge portion 514 of the bottom plate 511.

DESCRIPTION OF SYMBOLS 1 Handheld lawn mower, 2 Main body housing, 3 Drive mechanism part, 4 Cutting part, 4a Upper blade, 4b Lower blade, 41a Upper blade base, 41b Lower blade base, 42a Upper blade cutting blade part, 42b Lower blade cutting blade part 5 Kiwa cutting guide, 21 gripping part, 22 operation switch, 23 safety switch, 24 power cord, 25 engaging convex part, 26 bottom part, 26a horizontal plane, 41 base part, 42 cutting blade part, 51 base part, 52 guard part, 53 Rear wall, 54 tongue, 55 protrusion, 56 horizontal end, 57 side wall, 261 bottom recess, 511 bottom plate, 512 center bottom plate, 513 side bottom plate, 514 front edge, 521 protrusion, 521b side, 531 first One rear wall, 532 Second rear wall, 533 Engaging recess

Claims (4)

A body housing;
A drive mechanism built in the main body housing;
A cutting unit that is located outside the main body housing and is driven by the driving force of the driving mechanism unit to cut a cutting object such as turf;
A handheld lawn mower comprising a kneading mower guide disposed below the main body housing,
The kiwa mowing guide includes a guard part located below the cutting part, and a grass collecting part provided continuously from the guard part toward the rear.   The grass collecting portion is defined by a bottom plate formed at a lower portion of the kiwa cutting guide, a rear wall formed at a rear portion, a side wall formed at a side portion, and the main body housing. The handheld lawn mower according to claim 1.   The hand-held type according to claim 1 or 2, wherein the side wall is formed to extend in the front-rear direction, and a side surface of the guard portion is formed on an extension line of the side wall in a plan view. Lawn mower. The handheld lawn mower according to any one of claims 1 to 3, wherein the wrinkle mowing guide is detachably attached to the main body housing.

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