JP2009005653A - Mower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mower in which height adjustment can be carried out by a simpler operation. <P>SOLUTION: A mower 1 includes a body 3 having a blade 2, and a receiver 6 for receiving scrapes produced by mowing with the blade 2. The receiver 6 is attached to the body 3 so that the mounting position is changeable in the vertical direction. In the mower 1, the receiver 6 is equipped with a mounting plate 63 extending in the longitudinal direction along both sides of the body 3, and either one of a plurality of first recessed parts 61 which are different in position in height direction or a pair of first protruded parts 31 is formed on the surface facing the side of the body 3 in the mounting plate 63, and the other of the plurality of the first recessed parts 61 which are different in position in height direction or the pair of the first protruded parts 31 is formed on the both sides of the body 3, and the mounting position of the receiver 6 to the body 3 is changeable in the vertical direction by engaging the first recessed part 61 with the first protruded part 31. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lawn mower, and more particularly, to a lawn mower provided with a mechanism for adjusting the lawn mowing height.

  2. Description of the Related Art Conventionally, lawn mowers used for cutting grass growing on the ground are known. In this type of lawn mower, for example, a fixed blade and a movable blade are arranged so as to overlap each other, and the lawn mower can be trimmed by reciprocating the movable blade in the lateral direction with respect to the fixed blade. There is also a lawn mower that cuts grass by arranging two movable blades in a stacked manner and reciprocating each movable blade in the lateral direction and in the opposite direction. Furthermore, there is a lawn mower that mows the lawn by arranging the fixed blade and the movable blade in an overlapping manner and rotating the movable blade.

In the lawn mowers as described above, there are lawn mowers that have been devised in various ways for the purpose of mowing the lawn at a predetermined height.
JP 2002-335761 A JP 2007-44037 A JP 2004-41140 A

  The lawn mower described in Patent Document 1 includes a pair of movable blades that trim the grass forward, a body portion that includes a handle portion for a user to operate at the rear, and a front portion of the body portion from below the handle portion. A plurality of stop portions that support the front end portion of the guard device that is attached in a bridging manner are provided side by side in the vertical direction. The guard device has a rear end fixed to a lower part slightly behind the center of the main body, and the front end is attached to one stop selected by the user among the plurality of stops. .

  The lawn mower described in Patent Document 1 configured in this way can change the angle of the main body by attaching the front of the guard device to a stop selected by the user. Thus, the movable blade tilts in the vertical direction, and adjusts the height of grass clipping from the ground.

  The lawn mower described in Patent Document 2 is a slider provided with a main body including a blade and two main body positioning portions disposed on the lower front side and the rear side of the main body and having a sliding surface in contact with the object to be trimmed. A lawn mower comprising: a blade mowing machine, and a fixing tool that fixes the positioning of the main body with respect to the slider by fixing either one of the main body positioning portions disposed on the lower front side or the rear side and the slider. The surface is arranged in a direction substantially parallel to the sliding surface of the slider, and the distance from the blade can be adjusted while maintaining a substantially parallel state with respect to the sliding surface of the slider.

  The lawn mower described in Patent Document 2 configured as described above can adjust the distance between the blade and the slider while the slider sliding surface is maintained substantially parallel to the blade surface. As a result, the blade moves in parallel in the vertical direction and adjusts the height of grass clipping from the ground.

  In the lawn mower described in Patent Document 3, a receiver for receiving chips generated by cutting with a comb-shaped cutting blade is attached to a housing. In addition, a mounting plate is formed on the receiver, a through hole for a mounting screw formed on the mounting plate is formed as an elongated hole in the vertical direction, and the mounting screw is attached to the side surface of the housing through the through hole for the mounting screw. By screwing and fixing the formed screw hole, the mounting position of the receiver can be changed up and down, and the distance between the cutting blade and the receiver can be adjusted.

  The lawn mower described in Patent Document 3 configured in this way adjusts the distance between the cutting blade and the receiver by adjusting the receiver to an arbitrary position in the vertical hole and tightening with a mounting screw. As a result, the cutting blade moves in the vertical direction to adjust the height of grass clipping from the ground.

However, according to the configuration of the height adjustment mechanism of the conventional lawn mower described above, the lawn mower described in Patent Document 1 needs to be adjusted in height by lever operation. Patent Document 2 and Patent Document 3 In the lawn mower described in 1., it is necessary to release and tighten a fixing tool such as a screw to which the slider or receiver is fixed when adjusting the height. There is a problem that is complicated.
Further, in the lawn mower described in Patent Document 1, since the guard device is fixed in the front-rear direction of the main body, when the guard device is fixed to the main body, there is a problem that rattling occurs in the left-right direction. was there.
Furthermore, in the lawn mower described in Patent Document 3, since the receiver is attached only through the mounting screws provided only on the side surfaces of the housing, the user can screw the mounting screws during the mowing operation. There is a problem in that the fitting is easy to loosen and the cutting height cannot be maintained at a predetermined position.
Therefore, the present invention has been made in view of the above problems, and provides a lawn mower that can adjust the trimming height with a simpler operation and can be reliably fixed to the trimming height after adjusting the position of the main body. The main task is to do.

  The present invention will be described below. In addition, in order to make an understanding of this invention easy, the reference number of an accompanying drawing is attached in parenthesis writing, However, This invention is not limited to the form of illustration by it.

  A lawnmower (1) according to the present invention includes a main body (3) having a blade (2), and a receiver (6) attached to the main body (3) and receiving chips generated by cutting by the blade (2). The lawn mower (1) is attached to the receiver (6) so that its mounting position can be changed in the vertical direction with respect to the main body (3), and the receiver (6) A mounting plate (63) extending in the front-rear direction along both side surfaces of the main body (3) is provided, and a surface facing the side surface of the main body (3) in the mounting plate (63) is positioned in the height direction. Either one of a plurality of different first concave portions (61) or a pair of first convex portions (31) is formed, and a plurality of first concave portions having different positions in the height direction are formed on both side surfaces of the main body (3). (61) or the other of the pair of first convex portions (31) is shaped When the first recess (61) and the first protrusion (31) are engaged, the receiver (6) is attached to the main body (3) so that its mounting position can be changed in the vertical direction. It is characterized by being.

  In the lawn mower (1) according to the present invention, at least one of the second concave portion (32) or the second convex portion (62, 622) is formed at the rear end of the main body (3). In addition, at least one of the second concave portion (32) and the second convex portion (62, 622) is formed behind the receiver (6), and the second concave portion (32) and the second concave portion (32) are formed. The receiver (6) can be attached to the main body (3) by engaging the convex portions (62, 622).

  Moreover, in the lawn mower (1) according to the present invention, the receiver (6) can have flexibility.

  In the lawn mower (1) according to the present invention, the interval (a) between the surfaces of the mounting plate (63) facing the main body (3) can be smaller than the width of the main body (3). .

  In the lawn mower (1) according to the present invention, the second recess (32) or the second protrusion (62) formed at the rear of the receiver (6) has the second An operation portion (66) for releasing the engagement between the concave portion (32) and the second convex portion (62) can be provided.

  In the lawn mower according to the present invention, the height of the main body can be easily adjusted and the main body can be positioned simply by releasing the concave-convex engagement between the main body and the receiver. Can be performed with one hand, and the trimming height can be adjusted easily.

  In addition, since the receiver has flexibility, the user can easily release the concave-convex engagement by simply bending the receiver, and the trimming height can be easily adjusted.

  Furthermore, since the receiver is attached to the main body via attachment plates extending along both side surfaces of the main body, the receiver can be attached without causing backlash in the left-right direction of the main body.

  Furthermore, since the operation part is provided at the rear end of the receiver, the user can easily release the concave-convex engagement and operate by pulling in the direction to release the engagement by grasping the operation part. Engagement is possible, and the trimming height can be adjusted more easily.

  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 Embodiment]
1 is a plan view showing the overall structure of the lawn mower according to the first embodiment, and FIG. 2 is a front view showing the overall structure of the lawn mower according to the first embodiment. FIG. 4 is a plan view showing the overall structure of the receiver according to the first embodiment, and FIG. 4 is a partial cross-sectional view showing the assembling operation of the lawn mower according to the first embodiment to the main body of the receiver. FIG. 5 is an operation diagram showing an operation of adjusting the cutting height of the lawn mower according to the first embodiment, and FIG. 6 is a partial enlargement of the receiver of the lawn mower according to the second embodiment. FIG. 7 is an operation diagram illustrating an operation of adjusting the trimming height of the lawn mower according to the third embodiment, and FIG. 8 is a height adjustment of the lawn mower according to the third embodiment. It is a front view which shows the back state. For ease of explanation, FIGS. 1 to 8 are described with the left side as the front and the right side as the rear, and in FIGS. 1 and 3, the upper side is the right side and the lower side is the left side. In the following description, the internal structure of the main body is the same as that of a general electric lawn mower, so that it will be briefly described.

  The lawn mower 1 according to the first embodiment can be trimmed to a certain height by a user with one hand holding the lawn that has grown on the ground. Further, the height of lawn trimming can be adjusted, and the adjustment work can be easily performed.

  As shown in FIG. 2, the lawn mower 1 according to the first embodiment includes a main body 3 that is provided with a blade 2 that trims the lawn forward and forward, a lower part of the main body 3, and is disposed on the ground G. A receiver 6 that slides on the growing lawn. The receiver 6 supports the main body 3, and the positions of the main body 3 and the receiver 6 depend on the number of steps of the first recess 61 and the second recess 32. The height of the blade 2 from the ground G can be adjusted by moving the blade 2 in a direction substantially perpendicular to the ground G.

The main body 3 has a housing 3a formed by abutting the left and right split pieces. A discharge hole 3b is formed in front of the housing 3a to discharge heat generated from a drive unit (not shown) to the outside of the main body 3. Further, a substantially D-shaped grip portion 4 for the user to grip the main body 3 is formed at the rear portion of the housing 3a. A housing (not shown) such as a motor for driving the blade 2 is built in the housing 3a. Furthermore, a trigger 5 is provided in front of the inner periphery of the grip portion 4. The trigger 5 functions as a switch for driving the drive unit. When the trigger 5 is pressed by the user, the drive unit is activated and the blade 2 is activated.
Here, as shown in FIG. 1, the blade 2 is composed of an upper blade 2a and a lower blade 2b, and a plurality of cutting blades are formed on the distal ends of the upper blade 2a and the lower blade 2b. In this way, the upper blade 2a and the lower blade 2b swing along each other surface, so that the turf is sandwiched between the cutting blades of both blades and cut. The upper blade 2 a and the lower blade 2 b are of a wide type and are wider than the width of the main body 3.

  In this way, the user operates the trigger 5 while holding the grip portion 4 with one hand, and slides the lawn mower 1 on the lawn growing on the ground G, thereby moving the lawn growing on the ground G. It can be easily reaped.

  As shown in FIG. 4, first convex portions 31 are formed at substantially the center of both lower side surfaces of the main body 3, and second concave portions having different positions in the height direction are formed at the lower rear end of the main body 3. 32 is formed in three places.

  Next, as shown in FIG. 3 and FIG. 4, the receiver 6 is formed with a chip receiver portion including a bottom plate 65 in contact with the ground G and a back plate 64 erected from the bottom plate 65. A pair of mounting plates 63 extending in the front-rear direction along both side surfaces of the main body 3 are formed behind the back plate 64, and each mounting plate 63 has a first recess 61 having a different position in the height direction. Are formed in three places. Here, the mounting plate 63 is erected from the bottom portion 65 at intervals of the width a. Further, a thin portion 67 is formed on the mounting plate 63, and a single convex portion extending in the left-right direction is formed behind the thin portion 67 as the second convex portion 62. Furthermore, an operation portion 66 is formed behind the second convex portion 62.

  As shown in FIGS. 2 and 4, the receiver 6 is attached to the main body 3 by engaging the first concave portion 61 and the first convex portion 31 and the second concave portion 32 and the second convex portion 62, respectively. Further, since the receiver 6 is formed of a highly elastic synthetic resin, it has flexibility, and when the receiver 6 is attached to the main body 3, it can be easily bent by bending the receiver 6 in the front-rear direction. The first concave portion 61 and the first convex portion 31 can be engaged, and the second concave portion 32 and the second convex portion 62 can be engaged. The engagement between the first concave portion 61 and the first convex portion 31 and the engagement between the second concave portion 32 and the second convex portion 62 can be maintained. Furthermore, since the width a indicating the distance between the opposing surfaces of the pair of mounting plates 63 is set to be smaller than the width A of the main body 3, when the receiver 6 is mounted on the main body 3, Since the main body 3 is sandwiched by the elastic force, the rattling of the receiver 6 in the left-right direction can be suppressed.

  Next, a method for adjusting the trimming height will be described with reference to FIG. The front trimming height is adjusted by pressing the thin portion 67 of the receiver 6 in the pressing direction F shown in FIG. 1 and bending it forward, thereby widening the interval between the first concave portion 61 and the second convex portion 62. The engagement between the first concave portion 61 and the first convex portion 31 is released. Then, the front trimming height can be adjusted by engaging the first convex portion 31 with another concave portion of the first concave portion 61. When the engagement between the first concave portion 61 and the first convex portion 31 is finished and the user releases the hand from the receiver 6, the receiver 6 is naturally restored to the original state by the elastic force of the receiver 6, and the first The engagement between the first concave portion 61 and the first convex portion 31 is fixed. Next, the rear trimming height adjustment is performed by pulling the operation portion 66 rearward or by pressing the thin portion 67 in the pressing direction F shown in FIG. Is bent backward, and the second convex portion 62 moves rearward, so that the engagement between the second concave portion 32 and the second convex portion 62 is released. Then, while holding the operation portion 66 or pressing the thin portion 67 in the pressing direction F, the second convex portion 62 is engaged with another concave portion of the second concave portion 32 corresponding to the engagement position of the first concave portion 61. By combining, the rear trimming height can be adjusted. When the engagement between the first convex portion 31 and the first concave portion 61 is set at the lowermost stage of the first concave portion 61, the engagement position of the second concave portion 32 is set at the uppermost stage of the second concave portion 32. The blade 2 and the ground G can be fixed substantially in parallel. Similarly, when the engagement between the first convex portion 31 and the first concave portion 61 is set at the uppermost stage of the first concave portion 61, the engaging position of the second concave portion 32 is set at the lowermost stage of the second concave portion 32. Will be. Similarly to the front trimming height adjustment, when the engagement between the second concave portion 32 and the second convex portion 62 is completed and the user releases his / her hand from the operation portion 66, the receiver 6 is naturally moved by its elastic force. The original state is restored and the engagement between the second concave portion 32 and the second convex portion 62 is fixed.

  As described above, the lawn mower 1 according to the first embodiment can release the engagement between the main body 3 and the receiver 6 only by bending the mounting plate 63 of the receiver 6 in the front-rear direction. Accordingly, the distance between the blade 2 and the ground G can be adjusted while maintaining a substantially parallel state between the ground G and the surface of the blade 2, and the trimming height T can be easily adjusted. It has become.

  Next, the operation of the lawn mower 1 according to the first embodiment will be described in detail.

  In the lawn mower 1 according to the first embodiment, the user presses the trigger 5 while holding the grip portion 4 with one hand, drives the drive portion to operate the blade 2, and presses the main body 3 downward. While moving the main body 3 forward and sliding the receiver 6 on the lawn, the lawn can be trimmed at a certain height, and the trimmed lawn can be collected by the receiver 6. It is possible.

  Further, the lawnmower 1 according to the first embodiment can release the engagement between the main body 3 and the receiver 6 only by bending the mounting plate 63 of the receiver 6 in the front-rear direction. In addition, since the height of the main body 3 can be easily adjusted by simply releasing the engagement between the main body 3 and the receiver 6 and the main body 3 can be positioned, the trimming height T can be adjusted. Work is easy.

  Furthermore, since the concave portion and the convex portion formed in the main body 3 and the receiver 6 are arranged away from the blade 2, the user intervenes in the vicinity of the blade 2 when adjusting the trimming height. Since the receiver 6 extends to the lower surface of the blade 2, the receiver 6 acts as a protective member for the blade 2 when adjusting the trimming height. Adjustments can be made.

[Second Embodiment]
As mentioned above, in the lawnmower 1 which concerns on 1st Embodiment demonstrated, the case where the 2nd convex part 62 was formed as a single convex part extended in the left-right direction was demonstrated. The lawn mower 1 according to the second embodiment to be described next will explain an example of the second convex portion 622 having a form different from that of the first embodiment. Note that members that are the same as or similar to those in the first embodiment described above are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 6 is a partially enlarged view showing the receiver 6 of the lawn mower 1 according to the second embodiment.

  In the lawn mower 1 according to the second embodiment, the second protrusions 622 formed at the rear of the receiver 6 are formed as a pair of protrusions protruding from the mounting plate 63. When the second convex portion 622 releases the engagement between the second concave portion 32 and the second convex portion 622, the rigidity of the rear end of the receiver 6 is made lower than that formed as a single convex portion. Therefore, the receiver 6 can be bent more easily, and the engagement between the second concave portion 32 and the second convex portion 622 can be released more easily. As a result, the trimming height can be adjusted more easily.

[Third Embodiment]
As described above, in the lawn mower 1 according to the first embodiment and the second embodiment described above, the case where the second recess 32 is formed as a plurality of recesses having different positions in the height direction has been described. The lawn mower 1 according to the third embodiment to be described next will explain an example of the second recess 323 having a different form from the first embodiment and the second embodiment. In addition, about the member same or similar to the case of 1st Embodiment and 2nd Embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 7 is an operation diagram illustrating an operation for adjusting the trimming height of the lawn mower according to the third embodiment.

  In the lawn mower 1 according to the third embodiment, the second recess 323 formed at the rear of the main body 3 is formed as a single recess. When the lawnmower 1 according to the third embodiment releases the engagement between the first concave portion 61 and the first convex portion 31 during trimming height adjustment, the receiver 6 is centered on the second convex portion 62. It moves by drawing a roughly circular orbit. Further, as shown in FIG. 8, the angle between the blade 2 and the ground G can be changed by engaging the first convex portion 31 with the other first concave portion 61. Can be adjusted. The lawn mower 1 formed in this way can perform the trimming height adjustment without releasing the engagement between the second concave portion 323 and the second convex portion 62 at the time of trimming height adjustment. The trimming height can be adjusted with a simple operation.

  The preferred embodiments of the present invention have been described above, but the technical scope of the present invention is not limited to the scope described in the above embodiments. For example, the blade 2 described in the first embodiment includes a pair of movable blades (upper blade 2a and lower blade 2b), but the lower blade 2b is fixed and only the upper blade 2a is the upper surface of the lower blade 2b. May be swung.

  In the lawn mower 1 according to the first embodiment of the present invention, a plurality of first concave portions 61 may be formed in the main body 3 and a pair of first convex portions 31 may be formed in the receiver 6.

  Furthermore, in the lawn mower 1 according to the first embodiment of the present invention, a plurality of second convex portions 62 may be formed in the main body 3 and the second concave portions 32 may be formed in the receiver 6. It is apparent from the claims that the embodiments added with such changes or improvements can also be included in the technical scope of the present invention.

It is a top view which shows the whole structure of the lawn mower which concerns on 1st Embodiment. It is a front view which shows the whole structure of the lawn mower which concerns on 1st Embodiment. It is a top view which shows the whole structure of the receiver which concerns on 1st Embodiment. It is a partial cross section figure which shows the assembly | attachment operation | movement to the main body of the receiver of the lawn mower which concerns on 1st Embodiment. It is an operation | movement figure which shows the operation | movement of the cutting height adjustment of the lawn mower which concerns on 1st Embodiment. It is a partial enlarged view of the receiver of the lawn mower according to the second embodiment. It is an operation | movement figure which shows the operation | movement of the cutting height adjustment of the lawn mower which concerns on 3rd Embodiment. It is a front view which shows the state after trimming height adjustment of the lawn mower which concerns on 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lawn mower 2 Blade 3 Main body 4 Grasping part 5 Trigger 6 Receiver 31 First convex part 32, 323 Second concave part 61 First concave part 62, 622 Second convex part 63 Mounting plate 64 Back plate 65 Bottom plate 66 Operation part 67 Thin wall Part F Pressing direction G Ground T Cutting height

Claims (5)

A body with a blade;
A receiver attached to the main body and receiving chips generated by cutting by the blade;
The receiver is a lawnmower attached to the main body so that its attachment position can be changed in the vertical direction,
The receiver includes a mounting plate extending in the front-rear direction along both side surfaces of the main body,
On the surface of the mounting plate facing the side surface of the main body, either one of a plurality of first concave portions or a pair of first convex portions having different positions in the height direction is formed,
Either side of the plurality of first concave portions or the pair of first convex portions having different positions in the height direction is formed on both side surfaces of the main body,
The lawn mower characterized in that the receiver is attached to the main body so that the attachment position can be changed in the vertical direction by engaging the first concave portion and the first convex portion. The lawn mower according to claim 1,
At the rear end of the main body, at least one second concave portion or second convex portion is formed,
At least one of the second concave portion or the second convex portion is formed behind the receiver,
The lawn mower characterized in that the receiver is attached to the main body by engaging the second concave portion and the second convex portion. The lawnmower according to claim 1 or 2,
The lawn mower is characterized in that the receiver has flexibility. The lawn mower according to claim 1 to 3,
A lawnmower characterized in that a distance between surfaces of the mounting plate facing the main body is smaller than a width of the main body. The lawn mower according to claim 2 to 4,
An operation portion for releasing the engagement between the second concave portion and the second convex portion is provided behind either the second concave portion or the second convex portion formed at the rear of the receiver. lawn mower.

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