JP4847240B2 - Trimming machine - Google Patents

Description

  The present invention relates to a trimming machine such as a lawn hair clipper capable of trimming a lawn or a hedge with a trimming blade protruding forward from a main body.

  For example, in a lawn hair clipper, as shown in Patent Document 1, a pair of upper and lower trimming blades having a comb blade shape in plan view is projected forward from the lower surface of a main body that houses a motor, and is eccentric as the motor rotates. It has been known that the cutting blades can be trimmed by shearing both the trimming blades in the left-right direction via a mechanism.

JP 2002-335761 A

  Since the lawn clipper has the tip of the trimming blade exposed, the blade may be damaged if it comes into contact with a hard object such as a stone during the trimming operation. Therefore, it is conceivable to provide a guard member on the main body that covers from the top of the mowing blade to the tip, but when mowing the lawn near the wall (cutting), the guard member gets in the way and brings the cutting edge close to the wall. Cannot be used. Even when the guard member is detachable, it takes time to attach and detach the guard member one by one depending on the trimming location, leading to a decrease in workability.

  Accordingly, an object of the present invention is to provide a trimming machine that can perform cutting with good workability while maintaining protection of the blade portion.

In order to achieve the above object, according to the first aspect of the present invention, the front end is disposed along the trimming blade and the front end is in a guard position protruding forward from the operating range of the trimming blade, and the front end is elastically deformed by an external force. Then, a guard member that can be retracted into the operating range of the cutting blade in a plan view is provided, and the guard member is provided on the main body along the cutting blade, and the tip protrudes forward from the operating range of the cutting blade in a normal state. It is a comb-like body in which a plurality of elastic pins are arranged in parallel at the front portion, and the tip of the elastic pin can be retracted within the operation range by deformation due to external force .
In order to achieve the above object, the invention according to claim 2 is provided with a plurality of guard rods in which the guard member is provided on the main body along the trimming blade, and the tip normally projects forward from the operating range of the trimming blade. Is a comb-like body arranged in parallel with the front portion, and the tip of each guard rod is formed of an elastic member that can be retracted within the operating range of the cutting blade by deformation due to external force.
In order to achieve the above object, the invention according to claim 3 is a guard position in which the front end protrudes forward from the operating range of the cutting blade by a biasing means, which is arranged so as to be slidable back and forth along the cutting blade. And a slide plate that can be retracted into the operation range in a plan view by an external force is provided.

In order to achieve the above-mentioned object, the invention according to claim 4 is arranged to be slidable back and forth along the trimming blade, and in a normal state, the guard position in which the front end projects forward from the operating range of the trimming blade by the biasing means. And a slide plate that can be arbitrarily retracted into the operation range in a plan view by the operation unit.

According to the first to fourth aspects of the present invention, the guard member or the slide plate that can be retracted or arbitrarily moved by an external force is provided, so that the cutting of the cutting blade is maintained and the cutting is also performed. It can be implemented with good workability.
In particular , according to the first aspect of the present invention, it is possible to cut with a cutting blade while raising the lawn with the elastic pin of the guard member, and the cutting surface can be finished more beautifully.
In particular , according to the invention described in claim 2 , the guard member can be easily formed. Moreover, the replacement | exchange according to the damage and deterioration of an elastic member is also attained.
In particular, according to the third aspect of the present invention, it is possible to easily obtain a guard member that retreats from the guard position by adopting the slide plate. According to the fourth aspect of the present invention, the slide having the operation unit is provided. By adopting the plate, the movement operation to the guard position and the retracted position can be easily performed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<< Form 1 >>
FIG. 1 is a longitudinal sectional view of a lawn hair clipper which is an example of a mowing machine, FIG. 2 is a bottom view, and the lawn hair clipper 1 is formed by splitting left and right with a handle 3 extending rearward (left side in FIG. 1). The motor 4 is housed downward in the housing 2 as the main body, and the rotation of the pinion 6 fixed to the output shaft 5 of the motor 4 is output via the second gear 7 pivotally supported in the vertical direction behind it. The output can be reduced to the third gear 8 that is supported in the vertical direction in front of the shaft 5. Reference numeral 9 is a motor driving switch, and 10 is a switch lever for turning on the switch 9 by a pushing operation. Below the third gear 8, there are an upper blade 11 and a lower blade 12 in the form of a plane comb blade in which the blade ends 11 a, 11 a, and 12 a, 12 a,. The cutting blade 14 is formed by a front end portion that is pivotally attached to each other by a pin 13 in a state of being overlapped with each other and protrudes forward of the housing 2.

On the other hand, on the lower surface of the third gear 8, two bosses 15, 16 that are eccentric from the center of rotation in opposite directions are projected downward, and the one boss 15 has an upper blade through a collar 17. The other boss 16 is loosely inserted into a longitudinal hole 20 provided in the lower blade 12 via a collar 19 in the longitudinal hole 18 provided in the longitudinal direction 11.
Therefore, when the third gear 8 rotates as the motor 4 is driven, the upper blade 11 and the lower blade 12 follow the horizontal movement of the bosses 15 and 16 by the eccentric movement of the bosses 15 and 16, and the pin 13 is centered. The mowing blade 14 performs a shearing operation by the blade portions 11a and 12a. Reference numeral 21 denotes a lower cover that covers the lower surface of the housing, and a plate 22 that supports the lower surface of the lower blade 12 and guides its swinging is interposed between the lower cover 21 and the lower blade 12.

  A guard plate 23 that projects forward as a guard member is provided at the lower front end of the housing 2. The guard plate 23 is a plate made of a synthetic resin (for example, nylon) that is close to the upper blade 11 and covers the entire trimming blade 14 from above without contact, and the front end portion is narrower than the blade portions 11a and 12a. The elastic pins 24, 24... Have a planar comb blade shape protruding forward. The elastic pin 24 is formed in a circular shape at the tip, and is normally at a guard position that protrudes forward along the trimming blade 14 by a slightly smaller dimension (about 2 mm in this case) than the operating range of the trimming blade 14. It has elasticity that can be deformed in the vertical direction by external force.

In the lawn hair clipper 1 configured as described above, the tip of the guard plate 23 protrudes forward from the trimming blade 14 in a normal use state. The plate 23 comes into contact with the cutting blade 14 and is prevented from coming into contact with the cutting blade 14.
On the other hand, when cutting the lawn or the like near the wall, when the cutting blade 14 is brought close to the wall surface, the tip of the guard plate 23 comes into contact with the wall surface first, and the elastic pin 24 of the portion is elastically deformed. Allow forward. Therefore, the trimming blade 14 can be brought close to the wall surface as it is and trimming can be performed.

As described above, according to the lawn clipper 1 of the first aspect, the guard plate is normally located at the guard position where the front end protrudes forward from the operating range of the trimming blade 14, and the front end can be retracted into the operating range in plan view by external force. By providing 23, it becomes possible to carry out trimming with good workability while maintaining protection of the blade portions 11a, 12a of the cutting blade 14.
In particular, as a guard member, a comb-like body is provided in the housing 2 along the trimming blade 14 and has a plurality of elastic pins 24 arranged in parallel at the front portion so that the tip normally projects forward from the operating range of the trimming blade 14. Since the guard plate 23 is used and the tip of the elastic pin 24 can be retracted within the operating range by deformation due to external force, the trimming blade 14 can be trimmed while raising the lawn by the guard plate 23, and the trimming surface is more beautiful Can be finished.

Note that the number and shape of the elastic pins are not limited to the above form, and the number may be reduced to widen the interval or may be tapered. Further, the tip can be changed to a triangular shape, a quadrangular shape or the like other than the circular shape.
Further, the guard member is not limited to the upper side of the trimming blade, and may be provided on the lower side by being fixed to the lower cover, or may be provided on both upper and lower sides.

Hereinafter, another embodiment of the present invention applied to a grass clipper will be described. In addition, since the main structures, such as a driving mechanism of a lawn hair clipper, are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and redundant description is omitted.
<< Form 2 >>
In the lawn hair clipper 1a shown in FIG. 3, a guard portion 25 is integrally projected from the lower end of the housing 2 as a guard member. As shown in FIG. 4, the guard portion 25 is also a plate-like body made of a synthetic resin (for example, the same ABS resin as the housing 2) that is close to the upper blade 11 and covers the entire trimming blade 14 from above without contact. The front portion has a planar comb blade shape in which tapered guard rods 26, 26,... Protrude from the blade portion 11a of the upper blade 11 at the same interval. A small core rod portion 27 protrudes from the end of each guard rod 26, and a rubber cap 28 as an elastic member is attached to the core rod portion 27. The cap 28 is normally in a guard position protruding forward by a slight dimension (about 2 mm) from the operating range of the trimming blade 14, but has elasticity that can be deformed by an external force.

In the lawn hair clipper 1a configured as described above, the tip of each cap 28 of the guard portion 25 protrudes forward from the trimming blade 14 in a normal use state, so that there are stones or the like during the trimming operation. First, the cap 28 comes into contact with the cutting blade 14 to prevent contact with the cutting blade 14.
On the other hand, when mowing the lawn at the wall or the like, when the mowing blade 14 is brought closer to the wall surface, the tip of the cap 28 comes into contact with the wall surface first and the cap 28 is elastically deformed as shown in FIG. In order to allow the forward movement, the trimming blade 14 can be brought close to the wall surface W to perform the trimming.

As described above, also in the lawn clipper 1a according to the second aspect, the cutting of the cutting blade 14 can be maintained with good workability while maintaining the protection of the cutting edge 14.
In particular, as a guard member, a comb-like body is provided in the housing 2 along the trimming blade 14, and a plurality of guard rods 26 whose front ends normally protrude forward from the operating range of the trimming blade 14 in the front portion. By employing the guard portion 25 and forming the tip of each guard rod 26 with a cap 28 that can be retracted within the operating range of the trimming blade 14 by deformation due to external force, the guard member can be easily formed. Further, the cap 28 can be replaced in accordance with damage or deterioration.

In the second embodiment, the number and form of the guard rods 26 can be changed as appropriate. In particular, the connection structure between the guard rod and the cap can be attached without providing the core rod portion or can be integrated by integral molding. can do.
Further, the guard portion can be provided on the lower side of the trimming blade, for example, integrally formed on the lower cover, or can be provided on both the upper and lower sides.

<< Form 3 >>
In the lawn clipper 1b shown in FIG. 6, the lower cover 30 made of synthetic resin has long through holes 32, 32,... Through which screws 31 for screwing into the housing 2 pass, as shown in FIG. By doing so, the slide plate is slidable in the front-rear direction. FIG. 3A shows the lower half with the lower cover 30 removed. The front portion of the lower cover 30 has a planar comb blade shape in which tapered guard portions 33, 33,... Protrude from the blade portion 12a of the lower blade 12 at the same interval.
In addition, a coil spring 35 serving as a biasing means is provided in the front-rear direction between the engaging piece 34 erected near the rear end at the center of the upper surface of the lower cover 30 and the rear inner surface of the housing 2. Therefore, the lower cover 30 is normally moved forward by the coil spring 35 (the guard 31 is located at the rear end of the through-hole 32 and the tip of the guard portion 33 protrudes forward from the operating range of the trimming blade 14 by a slight dimension). Position).

On the other hand, a stopper 36 is provided on the rear side surface in the housing 2. The stopper 36 is provided below the receiving plate 37 projecting from the inner surface of the housing 2 so as to be movable up and down. A coil spring 38 provided between the stopper 36 and the lower plate 30 is attached to the lower limit position. It is energized. A concave portion 39 into which the stopper 36 is fitted at the forward position is formed on the upper surface of the lower cover 30.
Therefore, the slide of the lower cover 30 is normally restricted by the stopper 36 at the forward movement position. However, the stopper 36 is also connected to the stopper 36 through the window 40 provided on the side of the housing 2 as shown in FIG. Since the operation piece 41 projecting to the outside is formed, when the stopper 36 is slid upward against the bias of the coil spring 38 by the operation piece 41, the stopper 36 moves away from the recess 39 and the lower cover 30 slides. Regulations will be lifted.

In the lawn hair clipper 1b configured as described above, the tip of the guard portion 33 of the lower cover 30 at the forward movement position protrudes forward from the operating range of the cutting blade 14 in a normal use state. Even if there is a stone or the like, the guard portion 33 comes into contact first, and contact with the trimming blade 14 is prevented.
On the other hand, when mowing the lawn at the wall or the like, if the trimming blade 14 is brought close to the wall surface while the stopper 36 is slid upward, the tip of the guard portion 33 comes into contact with the wall surface first, and the lower cover 30 is coiled. In order to move backward against the urging force 35 and allow the cutting blade 14 to move forward, the cutting blade 14 can be brought close to the wall surface as it is to perform cutting.

As described above, also in the lawn clipper of the above-described aspect 3, the cutting of the cutting blade 14 can be maintained with good workability while the protection of the cutting edge of the cutting blade 14 is maintained.
Further, as a guard member, a slide plate (lower cover 30) that is slidable back and forth along the cutting blade 14 and is normally biased to the front guard position by the coil spring 35 and can be retracted within the operating range of the cutting blade 14 by an external force. ) Can be easily obtained from the guard position. In particular, here, the existing lower cover is also used as a slide plate, so that it has a rational configuration with a small number of parts.

In the third embodiment, the slide plate may be provided separately from the lower cover, or if the space is possible, the slide plate may be slidable on the upper side of the trimming blade and urged to the guard position. Further, a plurality of coil springs serving as urging means may be provided behind the slide plate, and other urging means such as a leaf spring may be employed in addition to the coil spring.
Furthermore, the slide of the slide plate is not limited to a screw and a long hole, but restricts the slide position of the slide plate and other guide means such as a rail such as a rib and a guide portion such as a concave groove that receives the rail. Other structures, such as realization by combination with a stopper, can also be adopted.
On the other hand, the stopper mechanism of the slide plate is not limited to the engagement / disengagement of the stopper and the recess. The structure can be changed as appropriate.

<< Form 4 >>
In the lawn hair clipper 1c shown in FIGS. 9 and 10, a rotating plate 42 made of synthetic resin is provided as a guard member above the trimming blade 14. The front portion of the rotating plate 42 is also in the form of a planar comb blade in which tapered guard rods 43, 43.. Project at the same interval as the blade portion 12 a of the lower blade 12. A front plate 44 that is bent downward is formed at the front end of each of the front plates 44, and the front plate 44 of each guard rod 43 is positioned forward of the trimming blade 14 at a guard position where the rotating plate 42 contacts the upper surface of the upper blade 11. Sag so as to cover without contact.
On the other hand, a pair of arms 45, 45 extend rearward on both sides of the rotating plate 42. As shown in FIG. 11, the cylindrical portion 46 provided at the rear end of each arm 45 is rotatably attached to the boss portions 47, 47 protruding from the left and right side surfaces of the housing 2 by screws 48. Yes. However, a torsion spring 49 serving as a rotation urging means having one end locked on the cylindrical portion 46 side and the other end locked on the housing 2 side is externally mounted on the cylindrical portion 46. It is urged to rotate in a direction to contact the trimming blade 14 side.

  Therefore, the rotating plate 42 is normally urged to the guard position shown in FIGS. 9 and 10, but the lever 50 is projected upward on one cylindrical portion 46 as shown in FIG. Therefore, when the lever 50 is tilted rearward and the cylindrical portion 46 is rotated against the urging force of the torsion spring 49, the rotary plate 42 is rotated rearward as shown by the solid line in FIG. Can be made.

In the lawn hair clipper 1c configured as described above, in a normal use state, as shown by a two-dot chain line in FIG. 9.10 or FIG. Since the front of the trimming blade 14 is protected by the plate 44, even if there is a stone or the like during the trimming operation, the front plate 44 abuts first and the abutment on the trimming blade 14 is prevented.
On the other hand, when mowing lawn such as near the wall, as shown by the solid line in FIG. 12, when the lever 50 is rotated backward, the rotating plate 42 is retracted to the upper rearward retracted position to expose the mowing blade 14. The trimming blade 14 can be brought close to the wall surface as it is, and the trimming can be performed.

As described above, also in the lawn clipper 1c according to the fourth aspect, the front end is normally in the guard position protruding forward from the operating range of the trimming blade 14, and the front end is arbitrarily moved to the retreat position where the front end is retracted into the operation range in plan view. By providing the operable rotating plate 42, the cutting of the cutting blade 14 can be maintained and the cutting can be performed with good workability.
In particular, the guard member is a rotating plate 42 whose rear end is pivotally attached to the side of the housing 2 and is rotatable between the front guard position and the upper rearward retracted position. With the configuration in which the rotation is biased to the guard position, the operation of moving the rotating plate 42 to the guard position and the retracted position can be easily performed.

In the above embodiment, the rotating plate can be rotated by a pair of arms, but it may be a cantilever type that is rotated by only one of the arms.
On the other hand, not only the structure in which the guard member is rotated between the guard position and the retracted position, but the slide plate that can slide in the front-rear direction and is urged to the guard position as in the form 3 A sliding operation can be arbitrarily performed to a rearward retracted position via a piece or the like. In this case, the slide plate may be used as the lower cover as in the third embodiment or may be provided separately.

<< Form 5 >>
The lawn hair clipper 1d shown in FIG. 13 uses the lower cover 30 as a slide plate in the same manner as in the third embodiment. However, as shown in FIGS. A protruding protruding plate 51 is formed, and a box-shaped tab 52 having an opening directed toward the housing 2 is screwed on the protruding plate 51 in an upright state as an operation section. A lock button 53 is loosely fitted to the door. The lock button 53 allows a pin 54 projecting toward the housing 2 to pass through a cylindrical portion 56 of an inverted L-shaped support plate 55 standing in parallel with the knob portion 52 on the protruding plate 51. Thus, it is supported so as to be movable back and forth with respect to the side surface of the housing 2. A stopper ring 57 is fitted perpendicularly to the tip of the pin 54, and the lock button 53 is urged toward the side of the housing 2 by a coil spring 58 that is externally provided between the stopper plate 57 and the support plate 55. On the other hand, a fitting recess 59 in which the pin 54 of the lock button 53 is fitted at the forward position of the lower cover 30 is formed on the side surface of the housing 2.

  Therefore, in this lawn clipper 1d, in a normal state where the lower cover 30 is urged to the forward movement position, the pin 54 of the lock button 53 is fitted into the fitting recess 59, and the backward movement of the lower cover 30 is restricted. Here, if the lock button 53 is pushed into the knob portion 52 so as to be pinched together with the knob portion 52, the tip of the pin 54 is released from the fitting recess 59 and the retraction restriction of the lower cover 30 is released, so that the knob portion 52 is moved back as it is. By doing so, the lower cover 30 can be retracted against the bias of the coil spring 35.

In the lawn hair clipper 1d configured as described above, the tip of the guard portion 33 of the lower cover 30 at the forward movement position protrudes forward from the operating range of the cutting blade 14 in a normal use state. Even if there is a stone or the like, the guard portion 33 comes into contact first, and contact with the trimming blade 14 is prevented.
On the other hand, when mowing the lawn at the wall or the like, the lower cover 30 is moved back against the bias of the coil spring 35 with the lock button 53 pushed into the knob 52 and the pin 54 removed from the fitting recess 59. Then, the guard part 33 is retracted to expose the trimming blade 14. Therefore, the trimming blade 14 can be brought close to the wall surface to perform trimming.

As described above, also in the lawn clipper 1d according to the fifth aspect, the trimming can be performed with good workability while maintaining the protection of the cutting edge of the trimming blade 14.
Further, as a guard member, a slide plate (slidable back and forth along the trimming blade 14 and normally biased to the front guard position by the coil spring 35 and retractable within the operating range of the trimming blade 14 by the knob 52 ( By adopting the lower cover 30), the moving operation to the guard position and the retracted position can be easily performed. Here too, the existing lower cover is also used as a slide plate, so that it has a rational structure with a small number of parts.

  Furthermore, by providing the lower cover 30 with a lock mechanism (lock button 53) that restricts the backward movement from the guard position, there is no risk of accidental backward movement of the lower cover 30 due to an erroneous operation or the like, and the cutting blade 14 is more reliable. Protection. In particular, since the lock button 53 is attached to the knob portion 52, the unlocking and the backward operation can be simultaneously performed by both operations, and the operability is excellent.

The knob part and the locking mechanism are not limited to the side of the slide plate. For example, in the above-described form, the knob part and the upper part of the protruding plate projecting rearward from the center of the rear end of the lower cover are directed upward from the knob part. A lock button to be urged is provided, and the lock button can be pushed down by a knob operation between the knob portion and the lock button so that the lock button can be moved backward. Of course, the locking mechanism is not limited to the above-mentioned lock button. If the sliding mechanism normally restricts the slide plate from retreating from the guard position, it can be variously used, such as a leaf spring that normally locks the pin provided at the tip to the housing side. The design can be changed.

It is a longitudinal cross-sectional view of the lawn hair clipper of form 1. It is a bottom view of a lawn hair clipper. It is a longitudinal cross-sectional view of the lawn hair clipper of form 2. It is a fragmentary top view of a guard part. It is explanatory drawing which shows a cutting state. It is a longitudinal cross-sectional view of the lawn hair clipper of the form 3. (A) is a bottom view of a lawn hair clipper, (B) is a cross-sectional view of a screw and a stopper part. It is a side view of the rear part of a housing. It is a longitudinal cross-sectional view of the lawn hair clipper of form 4. It is a bottom view of a lawn hair clipper. It is explanatory drawing of a lever part. It is a side view of the lawn hair clipper which shows operation | movement of a guard board. It is a longitudinal cross-sectional view of the lawn hair clipper of form 5. (A) is a bottom view of a lawn hair clipper, (B) is a cross-sectional view of an operation part and a lock mechanism part. (A) is explanatory drawing which looked at the operation part from the housing side surface side, (B) is the top view.

Explanation of symbols

1, 1a, 1b, 1c, 1d ... Lawn hair clipper, 2 ... Housing, 3 ... Handle, 4 ... Motor, 11 ... Upper blade, 11a ... Blade part, 12 ... Lower blade, 12a ... Blade part, 14 ... Cutting blade, 23 ... Guard plate, 24 ... Elastic pin, 25, 33 ... Guard part, 28 ... Cap, 30 ... Lower cover, 36 ... Stopper, 39 ... Recess, 42 .. Rotating plate 43.. Guard rod 44.. Front plate 45. Arm 46. Cylindrical part 52. Knob part 53. Lock button 54. Joint recess.

Claims (4)

A trimming machine in which a pair of trimming blades that shear in the left-right direction by driving the motor is protruded in front of the lower surface of the main body containing the motor,
A guard that is disposed along the trimming blade and is normally in a guard position where the front end protrudes forward from the operating range of the trimming blade, and the front end is elastically deformed by an external force and can be retracted into the operating range in plan view. by providing a member,
The guard member is provided in the main body along the trimming blade, and is normally a comb-like body in which a plurality of elastic pins whose front ends protrude forward from the operating range of the trimming blade are arranged in parallel to the front portion. A trimming machine characterized in that the tip of the elastic pin can be retracted within the operating range by deformation due to. A trimming machine in which a pair of trimming blades that shear in the left-right direction by driving the motor is protruded in front of the lower surface of the main body containing the motor,
A guard that is disposed along the trimming blade and is normally in a guard position where the front end protrudes forward from the operating range of the trimming blade, and the front end is elastically deformed by an external force and can be retracted into the operating range in plan view. Provide a member
Said guard member provided on said main body along said mowing blades, in a normal state and a comb-like member juxtaposed a plurality of guard bar protruding forward than the operating range of the blade pruning the tip in the front portion, each A trimming machine characterized in that the tip of the guard rod is formed of an elastic member that can be retracted within an operating range of the trimming blade by deformation due to external force. A trimming machine in which a pair of trimming blades that shear in the left-right direction by driving the motor is protruded in front of the lower surface of the main body containing the motor,
It is arranged so as to be slidable back and forth along the trimming blade, and in the normal state, the front end is at a guard position protruding forward from the operating range of the trimming blade by the biasing means, and can be retracted into the operating range in plan view by an external force Trimming machine characterized by providing a sliding plate. A trimming machine in which a pair of trimming blades that shear in the left-right direction by driving the motor is protruded in front of the lower surface of the main body containing the motor,
Arranged so as to be slidable back and forth along the trimming blade. Normally, the front end is at a guard position protruding forward from the operating range of the trimming blade by the urging means, and the operating unit arbitrarily enters the operating range in plan view. A trimming machine provided with a slide plate that can be moved backward.

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