JP4974480B2 - Trimming machine - Google Patents

Description

  The present invention relates to a trimming machine called, for example, a lawn hair clipper, a lawn mower, a hedge trimmer, and the like, and mainly relates to a trimming machine used for trimming a lawn or a hedge.

The trimming machine includes a trimming machine main body and a pair of blades provided on the trimming machine main body. In the trimming machine, the pair of blades are configured to be capable of relative movement by a power source built in the trimming machine main body. Each of the pair of blades has a plurality of cutting edge portions formed in a comb shape. When the pair of blades move relative to each other, the cutting edge portion formed on each blade cuts the plant or the like.
A blade cover is prepared for the trimming machine. When the trimming machine is not operated, it is possible to prevent the blade tips from being unnecessarily exposed by attaching a blade cover to the pair of blades. When storing the mowing machine or transporting the mowing machine, it is required to attach a blade cover to the pair of blades.
Patent Document 1 describes a technique related to a blade cover (referred to as a cutter cover in the document).
Japanese Utility Model Publication No. 52-50127

In order not to unnecessarily expose the blade, it is important to attach and detach the blade cover frequently. The operator removes the blade cover immediately before starting the operation of the mowing machine, and attaches the blade cover immediately after the operation of the mowing machine to carry the mowing machine with the blade exposed, You should try to avoid leaving the mower untouched.
However, the pruning work using the pruning machine is often performed outdoors, and thus has a feature that the work range is relatively wide. The work using the trimming machine is also rarely performed in one place and is often performed while moving.
When the mowing machine is moved while operating, the position where the blade cover is removed and the operation of the mowing machine is started is separated from the position where the operation of the mowing machine is finished and the blade cover is to be attached. In this case, an operator who has finished the operation of the trimming machine needs to return the blade cover to the position where the trimming machine has started to operate, which is inconvenient. In addition, the operator carries the mowing machine and returns, or leaves the mowing machine and returns, but in any case, the blade is exposed and it is necessary to pay attention to the blade. .
For this reason, for example, it is conceivable to perform the trimming work while carrying the blade cover. However, it is troublesome to operate the trimming machine while carrying the blade cover, and the blade cover may be lost.
The present invention solves the above problems. An object of the present invention is to provide a trimming machine capable of frequently attaching and detaching a blade cover, and to contribute to the convenience of work using the trimming machine.

The trimming machine provided by the present invention is provided so as to be movable between a first position and a second position with respect to the trimming machine body, a pair of blades provided in the trimming machine body, and the trimming machine body. A moving member is provided. The trimming machine main body is formed with a gripping part for an operator to grip, and the moving member is formed with a blade cover part and a guide part . The guide portion adjusts the position of the pair of blades with respect to the work surface by contacting the work surface. When the moving member is in the first position, the blade cover portion is attached to the pair of blades. When the moving member is in the second position, the blade cover portion is removed from the pair of blades, and the guide portion is in contact with the work surface. At this time, a part of the guide portion that comes into contact with the work surface is located between the work surface and the grip portion when the trimming machine body is viewed from the side .
It is also preferable that the moving member is rotatable with respect to the trimming machine main body and moves between the first position and the second position by being reversed .

In this trimming machine, the blade cover portion can be attached to the pair of blades by moving the moving member to the first position with respect to the trimming machine main body. Further, the blade cover portion can be removed from the pair of blades by moving the moving member to the second position with respect to the trimming machine main body.
According to this trimming machine, by moving the moving member, it is possible to remove the blade cover immediately before starting the operation of the trimming machine and to attach the blade cover immediately after finishing the operation of the trimming machine. The operator is not forced to carry or leave the trimming machine with the blade exposed. The blade cover can be frequently attached and detached without carrying the blade cover.

In the above-described trimming machine, it is preferable that a first position holding mechanism for holding the position of the moving member is added when the moving member is in the first position.
This prevents the blade cover portion attached to the pair of blades from being accidentally detached from the pair of blades.

In the above-described trimming machine, it is preferable that a second position holding mechanism for holding the position of the moving member is added when the moving member is in the second position.
Thereby, it is possible to prevent the moving member from moving unnecessarily when the trimming machine is operated and the trimming operation is performed.

In the trimming machine, the moving member is preferably provided so as to be movable between the first position, the second position, and the third position with respect to the trimming machine main body. In this case, when the moving member is in the third position, it is preferable that the blade cover portion is removed from the pair of blades and the guide portion is in contact with the work surface. A third position holding mechanism that holds the position of the moving member when the moving member is in the third position is preferably added.
If the guide portion is provided on the moving member, the position of the guide portion with respect to the pair of blades provided on the trimming machine main body can be adjusted by adjusting the position of the moving member with respect to the trimming machine main body.
In this trimming machine, when operating the trimming machine, the position of the moving member with respect to the trimming machine main body can be held at either the second position or the third position. Thereby, the position of the guide part with respect to the pair of blades can be selectively adjusted and held.

  According to the present invention, it is possible to frequently attach and detach the blade cover, and it is possible to ensure the safety of an operator who uses the trimming machine.

First, the main features of the embodiments described below are listed.
(Mode 1) The lawn hair clipper includes an urging member that urges the blade cover provided on the moving member toward the pair of blades when the moving member is in the first position.
(Mode 2) The lawn hair clipper includes a first engagement pair that holds a relative position between the lawn hair clipper and the moving member by engaging when the moving member is in the first position. One of the first engagement pair is provided on the lawn hair clipper main body side. The other of the first engagement pair is provided on the moving member side.
(Mode 3) The lawn hair clipper includes a second engagement pair that holds the relative position of the lawn hair clipper and the moving member by engaging when the moving member is in the second position. One of the second engagement pair is provided on the lawn clipper main body side. The other of the first engagement pair is provided on the moving member side.
(Mode 4) The lawn hair clipper is a biasing member that biases at least one of the second engagement pair in a direction in which the second engagement pair continues to be engaged when the moving member is in the second position. I have.

An embodiment of a lawn hair clipper embodying the present invention will be described with reference to the drawings. A lawn clipper is a trimming machine whose main application is lawn trimming.
FIG. 1 is an external view of a lawn hair clipper 10 according to an embodiment. As shown in FIG. 1, the lawn hair clipper 10 has a lawn hair clipper main body 16 (hereinafter simply referred to as a main body), an upper blade 32 and a lower blade 34 provided on the main body 16, and the main body 16. A movable member 40 is provided so as to be movable.
The main body 16 is provided with a grip portion 12 for an operator to grip the lawn hair clipper 10, a trigger switch 14 that is an operation switch of the lawn hair clipper 10, and the like. The lawn hair clipper 10 is a handheld mower.
The main body 16 is provided with an engaging projection member 46, an engaging claw portion 36, and the like for engaging with various parts of a moving member 40 described later. The engaging projection member 46 is provided so as to be able to advance and retreat with respect to the main body 16 and is biased in a direction protruding from the main body 16. The engaging claw portion 36 is fixed to the main body 16.

FIG. 2 is an external view (partially, a sectional view) of the lawn hair clipper 10 of the embodiment as viewed from below (downward in FIG. 1). 3 is a cross-sectional view taken along line III-III shown in FIG. As shown in FIG. 2, the upper blade 32 and the lower blade 34 are respectively formed with blade edge portions 32a and 34a arranged in a comb shape.
As shown in FIGS. 2 and 3, the pair of blades 32 and 34 are supported so as to be swingable around the shaft member 66 with respect to the main body 16. A fitting hole 34b into which a first rotating cam 74b provided on the main body 16 side is fitted is formed at the base end portion of the lower blade 34 (opposite side of the group of cutting edge portions 34a). The fitting hole 34b has a slot shape. When the first rotating cam 74b rotates, the lower blade 34 reciprocally swings. Similarly, the upper blade 32 is formed with a fitting hole 32b into which the second rotating cam 74a provided on the main body 16 side is fitted. When the second rotating cam 74a rotates, The blade 32 is configured to reciprocate and swing. The first rotating cam 74b and the second rotating cam 74a are configured to rotate with a phase difference of approximately 180 degrees, and the pair of blades 32 and 34 are configured to reciprocate in opposite directions. .

  As shown in FIG. 3, the main body 16 includes a motor 60 that is a driving source, a power transmission unit 62 that transmits a driving force of the motor 60 to the pair of blades 32 and 34, and the like. The aforementioned rotating cams 74 a and 74 b are part of the power transmission unit 62. The driving / stopping of the motor 60 is switched by operating the trigger switch 14. The rotational power of the motor 60 is transmitted to the rotating cams 74a and 74b and converted into the reciprocating swing motion of the pair of blades 32 and 34. Due to the symmetrical reciprocating rocking motion of the pair of blades 32, 34, the cutting edge portion 32a of the upper blade 32 and the cutting edge portion 34a of the lower blade 34 are repeatedly intersected to cut the lawn or the like.

The configuration of the moving member 40 will be described with reference to FIGS. The moving member 40 has a configuration in which a folded portion 30 and a plurality of rib-like protrusions 20, 44, 64 are formed on a generally U-shaped plate-like portion 42. Although the material of the moving member 40 is not specifically limited, For example, it is good to form using the resin material etc.
The folded portion 30 forms a space 30 a that can accommodate the pair of blades 32 and 34, and constitutes a blade cover of the pair of blades 32 and 34. Hereinafter, the folded portion 30 may be referred to as a blade cover portion 30.
Three first protrusions 20 formed on the blade cover part 30 and two second protrusions 64 formed along the U-shaped inner edge of the plate-like part 42 are Projecting toward the first surface 42a. Although mentioned later in detail, these protrusion parts 20 and 64 function as a guide for adjusting the trimming length of the lawn. Hereinafter, the first protrusion 20 may be referred to as the first guide 20. In addition, the second projecting portion 64 may be referred to as a second guide portion 64.
The two protruding portions 44 formed along the U-shaped outer edge of the plate-like member 42 protrude toward the second surface 42 b side with respect to the plate-like portion 42.
In the moving member 40, a long hole 54, a cutout portion 50, and a notch group 60 are formed in the second guide portion 64. The notch group 60 includes a first notch 60a, a second notch 60b, and a third notch 60c.

  As shown in FIGS. 1 and 2, the moving member 40 is attached to the main body 16 by a pin member 52 provided on the main body 16 side. The pin member 52 is loosely fitted in the long hole 54 of the moving member 40. As a result, the moving member 40 can move along the long axis direction of the long hole 54 (in the A direction in the state of FIG. 1) and rotate around the pin member 52 (in the C direction in the state of FIG. 1). It is possible to move. A washer 52 a is fixed to the end of the pin member 52. The diameter of the washer 52 a is larger than the short axis of the long hole 54, and the long hole 54 is prohibited from being detached from the pin member 52. Accordingly, the moving member 40 is prohibited from moving away from the main body 16. A spring member 56 is provided in the long hole 54 of the moving member 40.

1 and 2 show a state in which the blade cover 30 of the moving member 40 is attached to a pair of blades 32 and 34. Regarding the position of the moving member 40 with respect to the main body 16, the position of the moving member 40 shown in FIGS. 1 and 2 is referred to as a first position. When the moving member 40 is in the first position with respect to the main body 16, the blade cover portion 30 is attached to the pair of blades 32 and 34. When transporting the lawn clipper 10 or storing the lawn clipper 10, the blade cover 30 can be attached to the pair of blades 32, 34 by moving the moving member 40 to the first position. it can.
When the moving member 40 is in the first position, the engaging protrusion member 46 provided on the main body 16 is engaged with the notch 50 provided on the moving member 40. The engaging projection member 46 and the notch 50 constitute a first engagement pair that holds the relative position of the main body 16 and the moving member 40 by engaging when the moving member 40 is in the first position. . When the moving member 40 is in the first position, the spring member 56 urges the moving member 40 in the direction B in FIG. That is, the spring member 56 urges the blade cover portion 30 toward the pair of blades 32 and 34. The moving member 40 is held in the first position by the engagement by the first engagement pair 46 and 50 and the biasing force by the spring member 56, and the blade cover portion 30 may be detached from the pair of blades 32 and 34. Suppressed. This prevents the blade cover 30 from being accidentally detached from the pair of blades 32 and 34 when the lawn clipper 10 is being transported or while the lawn clipper 10 is being stored.

When the lawn clipper 10 is used, the blade cover 30 can be removed from the pair of blades 32 and 34 by pulling the moving member 40 in the direction A in FIG. Furthermore, the blade cover 30 can be retracted from the pair of blades 32 and 34 by rotating the moving member 40 in the direction C in FIG.
FIG. 6 shows a state in which the blade cover part 30 is removed from the pair of blades 32 and 34, and shows a state when the mowing work is performed by the lawn clipper 10. Regarding the position of the moving member 40 with respect to the main body 16, the position of the moving member 40 shown in FIG. 6 is referred to as a second position. When the moving member 40 is in the second position with respect to the main body 16, the blade cover portion 30 is removed from the pair of blades 32 and 34. The moving member 40 in the second position rotates about 180 degrees around the pin member 52 with respect to the moving member 40 in the first position.
When the moving member 40 is in the second position, the engaging claw portion 36 provided on the main body 16 is engaged with the first notch 60 a provided on the moving member 40. The engaging claw portion 36 and the first notch 60a constitute a second engaging pair that holds the relative position of the main body 16 and the moving member 40 by engaging when the moving member 40 is in the second position. Yes. When the moving member 40 is in the second position, the spring member 56 urges the moving member 40 in the direction A in FIG. That is, the spring member 56 biases the first notch 60a toward the engagement claw portion 36, whereby the second engagement pair 60a, 36 continues to be engaged. The moving member 40 is held in the second position by the engagement by the second engagement pair 36, 60a and the biasing force by the spring member 56, and the moving member 40 moves unnecessarily during operation of the lawn hair clipper 10. Is prevented.
The operator can perform lawn mowing work by moving the lawn hair clipper 10 along the lawn surface (work surface) H.

  As shown in FIG. 6, when the moving member 40 is in the second position, the first guide portion 20 group and the second guide portion 64 group provided on the moving member 40 face downward as viewed from the main body 16. It protrudes. That is, the first guide unit 20 group and the second guide 64 group can be brought into contact with the grass surface H. The first guide portion 20 group and the second guide portion 64 group are configured such that the top portions 20a and 64a are all located in the same plane. When the top portions 20a and 64a of the guide portions 20 and 64 are brought into contact with the grass surface H, the distance between the pair of blades 32 and 34 and the grass surface H is a predetermined distance L1. The operator can adjust the distance between the pair of blades 32 and 34 to the lawn surface H to a predetermined distance L1 by bringing the top group 20a and 64a group of the guide units 20 and 64 into contact with the lawn surface H. . By moving the lawn hair clipper 10 while maintaining this state, the lawn surface H can be easily trimmed to a substantially constant length L1.

  As shown in FIG. 6, when the moving member 40 is in the second position, the second surface 42 b of the plate-like portion 42 of the moving member 40 spreads behind the pair of shear blades 32 and 34. Further, the second surface 42 b of the plate-like portion 42 extends substantially parallel to the lawn surface H. The grass cut by the pair of shear blades 32 and 34 is received by the second surface 42 b of the plate-like portion 42 of the moving member 40. The turf received by the second surface 42b is held on the second surface 42b by the protrusion 44 formed along the outer edge of the second surface 42b. That is, in the moving member 40, a dust collecting portion (so-called chip receiver portion) is formed by the second surface 42 b and the protruding portion 44 of the plate-like portion 42.

As shown in FIG. 7, when using the lawn hair clipper 10, by engaging the second notch 60 b provided on the moving member 40 with the engaging claw portion 36 provided on the main body 16, The moving member 40 can also be held at a position different from the second position. That is, the engaging claw portion 36 and the second notch 60b constitute a third engagement pair that holds the relative position of the main body 16 and the moving member 40 by engaging when the moving member 40 is in the third position. is doing. Regarding the position of the moving member 40 with respect to the main body 16, the position of the moving member 40 shown in FIG. 7 is referred to as a third position. Even when the moving member 40 is in the third position, the guide portions 20 and 64 provided on the moving member 40 protrude downward as viewed from the main body 16. That is, the first guide unit 20 group and the second guide 64 group can be brought into contact with the grass surface H. However, when the moving member 40 is in the third position, the positions of the guide portions 20 and 64 groups with respect to the main body 16 are different from when the moving member 40 is in the second position. Thereby, when the guide parts 20 and 64 are brought into contact with the lawn surface H, the distance between the pair of blades 32 and 34 and the lawn surface H is a predetermined distance L2. The predetermined distance L2 is longer than the predetermined distance L1. The operator can easily trim the lawn to a substantially constant length L2 by adjusting the moving member 40 to the third position.
Even when the moving member 40 is adjusted to the third position, the second surface 42b of the plate-like portion 42 extends substantially parallel to the lawn surface H behind the pair of shear blades 32 and 34. Thereby, even when the moving member 40 is adjusted to the third position, the grass cut by the pair of shear blades 32 and 34 is collected on the second surface 42 b of the plate-like portion 42.

  Alternatively, as shown in FIG. 8, the moving member 40 is further moved to the third position by engaging the third notch 60 c provided in the moving member 40 with the engaging claw portion 36 provided in the main body 16. It can also be held at a different position. That is, the engaging claw portion 36 and the third notch 60c constitute a fourth engagement pair that holds the relative position of the main body 16 and the moving member 40 by engaging when the moving member 40 is in the fourth position. is doing. Regarding the position of the moving member 40 with respect to the main body 16, the position of the moving member 40 shown in FIG. 8 is referred to as a fourth position. Even when the moving member 40 is in the fourth position, the guide portions 20 and 64 provided in the moving member 40 are in a state where they can be brought into contact with the grass surface H. When the guide units 20 and 64 are brought into contact with the grass surface H, the distance between the pair of blades 32 and 34 and the grass surface H is a predetermined distance L3. The predetermined distance L3 is longer than the predetermined distance L2. The operator can easily trim the lawn to a substantially constant length L3 by adjusting the moving member 40 to the fourth position.

  In the lawn hair clipper 10, the lawn trimming length is adjusted to one of L1, L2, and L3 by adjusting the position of the moving member 40 with respect to the main body 16 between the second position, the third position, and the fourth position. be able to. Further, even when the moving member 40 is adjusted to any position, the second surface 42b of the plate-like portion 42 maintains the same angle with respect to the lawn surface H. Therefore, the mowing operation is performed while collecting the cut grass by the moving member 40. It can be performed.

The two protrusions 44 formed along the U-shaped outer edge of the plate-like member 42 perform the following functions in addition to the function of holding the cut grass.
A plane formed on the outside of the protruding portion 44 is formed substantially parallel to the longitudinal direction of the main body 16. That is, it is formed substantially parallel to the direction in which the main body 16 is moved during the trimming operation. Further, the width of the two protruding portions 44 is slightly wider than the width of the lower blade 34, and when the upper and lower blades 32, 34 swing left and right, the upper and lower blades 32, 34 have two It does not protrude beyond the protrusion 44. Thereby, when the lawn or the like growing near the wall is cut off, the outer plane of the protrusion 44 can be used as a side guide of the lawn clipper 10. That is, by moving the main body 16 forward while pressing the outer flat surface of the protruding portion 44 against the wall surface, the main body 16 is maintained in the correct orientation without contacting the swinging upper and lower blades 32 and 34 to the wall surface. However, it can be moved along the wall surface.

When the mowing work is finished or interrupted and the operation of the lawn clipper 10 is stopped, the moving member 40 is pulled out in the direction B in FIG. 6 with respect to the main body 16 and the moving member 40 is moved in the direction D in FIG. By rotating, the blade cover 30 can be attached to the pair of blades 32 and 34 again (the state shown in FIGS. 1 and 2). The blade cover 30 can be quickly attached to the pair of blades 32 and 34 without returning the blade cover. The operator is not forced to carry or leave the lawn hair clipper 10 with the pair of blades 32 and 34 exposed.
Further, by moving the moving member 40 to the first position, the guide portions 20 and 64 group provided on the moving member 40 can be moved to the upper side of the moving member 40. This state is a state in which the guide units 20 and 64 cannot be brought into contact with the lawn surface H or the like, and thus it can be said that the guide units 20 and 64 are accommodated. In a state where the moving member 40 is in the first position and the guide units 20 and 64 are accommodated, for example, even when the lawn clipper 10 is placed on the ground, the guide units 20 and 64 are in contact with the ground. There is no. Thereby, it can prevent that the guide parts 20 and 64 group are damaged.

As mentioned above, although embodiment of this invention was described in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.
The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. The technology illustrated in this specification or the drawings achieves a plurality of objects at the same time, and achieving one of the objects itself has technical utility.

The figure which shows an external appearance when the lawn hair clipper of an Example is seen from the side. The figure which shows an external appearance when the lawn hair clipper of an Example is seen from the downward direction. It is the III-III sectional view taken on the line in FIG. 2, and is a figure which shows the internal structure of a lawn hair clipper main body. The external view when a moving member is seen from the upper part. The external view when a moving member is seen from the side. The figure which shows the state at the time of use of a lawn hair clipper (cutting length L1). The figure which shows the state at the time of use of a lawn hair clipper (cutting length L2). The figure which shows the state at the time of use of a lawn hair clipper (cutting length L3).

Explanation of symbols

10. Lawn hair clipper 12. Grasping part 14. Trigger switch 16. Lawn hair clipper main body 20. First guide part 30 Blade cover part 32 Upper blade 34 Lower blade 36 Engagement Claw 40 ·· Moving member 42 · · Plate-like portion 42a · · Plate-like first surface 42b · · Plate-like second surface 46 · · Engaging protrusion 50 · · Notch 56 · · Spring member 60 .. Notch group 64 .. 2nd guide part

Claims (4)

A trimming machine body,
A pair of blades provided on the trimming machine body;
A moving member provided movably between the first position and the second position with respect to the trimming machine body;
The trimming machine main body is formed with a gripping part for an operator to grip,
The moving member is formed with a blade cover portion and a guide portion for adjusting the position of the pair of blades with respect to the work surface by contacting the work surface.
The moving member is rotatable with respect to the trimming machine main body and moves between the first position and the second position by reversing,
When the moving member is in the first position, the blade cover portion is attached to the pair of blades,
When the moving member is in the second position, the blade cover portion is removed from the pair of blades, and the guide portion is in contact with the work surface.
A trimming machine characterized in that a part of the guide part that abuts on the work surface is located between the work surface and the gripping part when the trimming machine main body is viewed from the side.   The trimming machine according to claim 1, further comprising a first position holding mechanism for holding the position of the moving member when the moving member is in the first position.   The trimming machine according to claim 1 or 2, further comprising a second position holding mechanism for holding the position of the moving member when the moving member is in the second position. The moving member is provided to be movable between a first position, a second position, and a third position with respect to the trimming machine body,
When the moving member is in the third position, the blade cover portion is in a state of being removed from the pair of blades, and the guide portion is in contact with the work surface.
The trimming machine according to any one of claims 1 to 3 , further comprising a third position holding mechanism that holds the position of the moving member when the moving member is in the third position.

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