JP6862120B2 - Long hedge trimmer - Google Patents

Description

The present invention relates to a long hedge trimmer suitable for cutting branches and leaves at a high position.

A long type hedge trimmer having a long hand-to-cutting blade dimension as described in Patent Documents 1 to 3 below is suitable for pruning branches and leaves at high positions that cannot be reached. On the other hand, when the cutting blade bites into a branch at a high position and the motor stops, for example, it is necessary to prepare a stepladder, climb the stepladder, and cut the branch bitten by the cutting blade. Deteriorates significantly.

Japanese Unexamined Patent Publication No. 2010-11028 Japanese Unexamined Patent Publication No. 2011-2396999 Japanese Unexamined Patent Publication No. 2013-198940

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a long hedge trimmer capable of easily restarting the work when the cutting blade bites into a branch at a high position and the motor stops. To do.

The present invention has been made to solve the above problems, and the long hedge trimmer according to the present invention is provided on a main body portion provided with a motor, a handle portion extending forward from the main body portion, and a front side of the handle portion. A long hedge trimmer equipped with a blade mounting portion for mounting a cutting blade and a cutting blade mounted on the blade mounting portion, and a hand-cranked mechanism for manually rotating a stopped motor on the main body. It is characterized by having.

The long hedge trimmer having this configuration is provided with a hand-cranking mechanism in the main body, which is a hand portion. Therefore, if the cutting blade bites into a thick branch and the motor stops during cutting of high branches and leaves, operate the hand-cranking mechanism at hand to manually rotate the motor to eliminate the biting of the cutting blade. Can be done.

In particular, it is preferable that the motor is arranged along the front-rear direction and the hand-cranking mechanism is arranged on the rear side of the motor. By arranging the motors along the front-rear direction, the dimensions of the main body in the vertical direction can be suppressed as compared with the configuration in which the motors are arranged in the vertical direction, and the main body can be made long in the front-rear direction as a whole. The main body can be easily gripped. When the hand-cranking mechanism is arranged on the rear side of the motor, the hand-cranking mechanism can be easily operated from the hand side as compared with the configuration arranged on the front side, and the restoration work is easy.

Further, the main body portion includes a main body housing, and the motor is housed in the main body housing. The main body housing is provided with a wall surface portion orthogonal to the center line of the motor at a position on the rear side of the motor, and the wall surface portion is provided. It is preferable that a knob for turning by hand is provided. When the hand-cranking knob is provided on the wall surface portion of the main body housing located on the rear side of the motor, the hand-cranking knob can be easily operated from the front side, that is, the rear side. Therefore, for example, it is possible to quickly operate the hand-cranking knob with the other hand while grasping the main body portion and the handle portion with one hand, which is excellent in operability and allows the work to be resumed immediately.

Furthermore, the main body is provided with a deceleration mechanism on the front side of the motor for decelerating the rotation of the motor, and the center line of the motor is offset downward with respect to the center line of the handle portion. It is preferable that the main body housing is formed with a bulging portion that bulges downward in accordance with the arrangement, and a knob for hand rotation is provided on the rear wall surface portion of the bulging portion. By arranging the motors at offset, it becomes easy to arrange the deceleration mechanism for decelerating the rotation of the motors. Then, by providing a hand-cranking knob on the rear wall surface of the bulging portion, the hand-cranking knob can be easily operated from the rear side.

As described above, since the hand-cranking mechanism is provided in the main body, which is the hand part, even if the cutting blade bites into a branch at a high position and the motor stops, it is easy to operate the hand-cranking mechanism. The work can be restarted and the decrease in work efficiency can be prevented.

The front view of the long hedge trimmer in one embodiment of the present invention as viewed from the right side. Plan view of the long hedge trimmer. Bottom view of the long hedge trimmer. A cross-sectional view of the long hedge trimmer with the hand side cut in the vertical direction. A cross-sectional view of the front part of the long hedge trimmer cut in the vertical direction. A perspective view of the hand side of the long hedge trimmer viewed from diagonally below. Front view of the hand side of the long hedge trimmer as seen from the right side. FIG. 7A is a sectional view taken along the line AA of FIG. FIG. 8 is a cross-sectional view corresponding to FIG. 8, where FIG. 8A shows a normal time and FIG. 8B shows a hand-cranked time. FIG. 7 is a cross-sectional view taken along the line BB of FIG. 7, showing a state at the time of manual rotation.

Hereinafter, the long hedge trimmer according to the embodiment of the present invention will be described with reference to FIGS. 1 to 10. The long hedge trimmer in the present embodiment is provided on the main body 1 provided with the motor 4, the handle 2 extending forward from the main body 1, and the blade mounting on the front side of the handle 2 for mounting the cutting blade 5. A portion 3 and a cutting blade 5 attached to the blade attachment portion 3 are provided. Hereinafter, a detailed description will be given. The tip side is the front side, and the hand side is the rear side.

The long hedge trimmer in the present embodiment is a rechargeable type and is configured to be equipped with a battery pack (not shown). Therefore, a battery mounting portion 6 for mounting the battery pack is provided at the rear end portion of the main body portion 1. That is, the battery pack is attached to the rear end of the long hedge trimmer. The mounting direction of the battery pack may be a direction orthogonal to the front-rear direction, but in the present embodiment, the battery pack is inclined by a predetermined angle with respect to the orthogonal direction. Further, the mounting surface of the battery mounting portion 6 faces rearward and diagonally downward. Therefore, as shown by the arrow P in FIG. 4, the battery pack is slid onto the battery mounting portion 6 diagonally upward and diagonally downward from the rear and diagonally forward.

Although the strap 60 is shown by a chain double-dashed line in FIG. 1, a strap attachment portion 6a for attaching the strap 60 is provided at the lower end portion of the battery attachment portion 6. When the strap 60 is attached in this way, when the long hedge trimmer is stored, the long hedge trimmer can be hung by the strap 60, for example, by hooking it on a wall or the like. The position of the strap mounting portion 6a is not limited to the lower end portion of the battery mounting portion 6, and may be another location, for example, the upper end portion of the battery mounting portion 6.

The main body 1 includes a main body housing 10, and the motor 4 is housed in the main body housing 10. The main body housing 10 is divided into two left and right parts. The battery mounting portion 6 is also provided in the main body housing 10. The main body housing 10 has a tubular shape as a whole except for the battery mounting portion 6 at the rearmost portion. The motor 4 is housed in the front portion of the main body housing 10, and an operation switch 11 is arranged between the battery mounting portion 6 and the motor 4. The operation switch 11 is provided on the upper surface of the main body housing 10, and the motor 4 operates when it is in the ON state, and stops when it is in the OFF state.

A motor accommodating portion for accommodating the motor 4 is provided at the front portion of the main body housing 10. Specifically, the motor 4 is arranged along the front-rear direction, and the center line of the motor 4 is parallel to the center line of the main body housing 10 and the center line of the handle portion 2, but is downward with respect to them. It is offset. Corresponding to the downward offset arrangement of the motor 4, a downwardly bulging bulging portion 12 is formed in the lower part of the front portion of the main body housing 10, and the bulging portion 12 serves as a motor accommodating portion. It is configured. The bulging portion 12 has a cylindrical shape with a semicircular cross section, and the rear wall surface portion 12a, which is the rear end surface of the bulging portion 12, is orthogonal to the center line of the motor 4.

On the rear side of the motor 4, a manual rotation mechanism for manually rotating the motor 4 when the motor 4 is stopped is provided. An engaging member 13 having a non-circular engaging male portion 13a in a cross-sectional view is mounted on the rear end portion of the main shaft 7 of the motor 4 so that two positions facing each other 180 degrees out of the entire circumference of the outer peripheral surface are D-cut. ing. The engaging male portion 13a of the engaging member 13 is coaxial with the main shaft 7 of the motor 4 and projects toward the rear side. A knob 14 for hand rotation is arranged on the rear wall surface portion 12a of the bulging portion 12, and the knob 14 for hand rotation is configured to rotate about an axis in the front-rear direction and is positioned coaxially with the motor 4. doing. An engaging female portion 14a capable of engaging the engaging male portion 13a in the front-rear direction is recessed in the front end surface of the hand-cranked knob 14. That is, the cross-sectional shape of the hole of the engaging female portion 14a corresponds to the shape of the engaging male portion 13a. Further, the rear wall surface portion 12a of the bulging portion 12 is provided with a coil spring 15 as an urging means for urging the knob 14 for hand rotation to the rear side. As shown in FIG. 9A, the hand-cranking knob 14 is always separated rearward from the engaging member 13 by the coil spring 15, and the engaging female portion 14a of the hand-cranking knob 14 is the engaging member 13. It is in a state where it is separated rearward from the engaging male portion 13a and is not engaged with each other. Therefore, if the hand-cranked knob 14 is rotated in that state, only the hand-cranked knob 14 slips and the motor 4 cannot be manually rotated. On the other hand, in the state where the motor 4 is stopped, as shown in FIG. 9B, the hand-rotating knob 14 is pushed forward against the urging force of the coil spring 15 and manually rotated to the engaging male portion 13a of the engaging member 13. When the engaging female portion 14a of the knob 14 is engaged, the spindle 7 of the motor 4 can be rotated by rotating the knob 14 for hand rotation. When the hand is released from the hand-cranking knob 14, the hand-cranking knob 14 is pushed by the coil spring 15 and automatically separates rearward from the engaging member 13 and returns to the original state as shown in FIG. 9A. In the present embodiment, a hand-cranking knob 14, a coil spring 15, and an engaging member 13 constitute a hand-cranking mechanism.

A recess 16 that is locally recessed upward is formed at a position on the lower portion of the main body housing 10 and behind the bulge 12, and the wall surface on the front side of the recess 16 is a bulge. It is a rear wall surface portion 12a of 12. The wall surface 16a on the rear side of the recess 16 is not a vertical surface but an inclined surface inclined toward the rear side. The upper surface of the main body housing 10 has a constant height and is parallel to the center line. Therefore, the vertical dimension of the main body housing 10 is locally reduced in the recessed portion 16. Further, guard walls 17 are formed on the left and right side edges of the recessed portion 16, respectively. The guard wall 17 is a surface along the front-rear direction, and a pair of left and right guard walls 17 are parallel to each other and face each other. The guard wall 17 is formed so as to cover the upper part of the side of the recessed portion 16, and the lower end edge thereof is inclined toward the lower side toward the front side.

A reduction mechanism 20 is provided on the front side of the motor 4. The speed reduction mechanism 20 is housed from the front portion of the bulging portion 12 to the upper portion thereof. The rear end of the propeller shaft 21 is connected to the speed reduction mechanism 20. The propeller shaft 21 is a drive transmission member for transmitting the driving force of the motor 4 to the cutting blade 5. The rotation of the motor 4 is decelerated by the deceleration mechanism 20 and then transmitted to the propeller shaft 21 to be transmitted to the propeller shaft 21. Is rotated around the axis in the front-back direction. A tubular connecting portion 18 is formed on the front side of the bulging portion 12, and the main body housing 10 is connected to the handle portion 2 by the connecting portion 18.

The handle portion 2 has a pipe 22 which is a straight pipe having an axis in the front-rear direction, and the propeller shaft 21 inserts the pipe 22 through the pipe 22. The pipe 22 may be made of synthetic resin or metal. The rear end portion of the pipe 22 is inserted into and fixed to the connecting portion 18 of the main body housing 10. A tubular grip 23 is attached to the outer peripheral surface of the pipe 22. The grip 23 is composed of, for example, foamed EVA.

A head portion 8 is provided on the front side of the handle portion 2. The head portion 8 has a head housing 30, and the head housing 30 houses a conversion mechanism 31 that converts the rotation of the motor 4 into a reciprocating motion in the front-rear direction. The head housing 30 is also divided into two left and right parts like the main body housing 10. The rear end portion of the head housing 30 is a tubular connecting portion 32, and the front end portion of the pipe 22 of the handle portion 2 is inserted into the connecting portion 32 and fixed. The base end portion of the cutting blade 5 is replaceably attached to the lower end portion of the conversion mechanism 31. The cutting blade 5 can be attached and detached by a screw 33 as shown in FIGS. 3 and 5. In this way, the lower part of the head portion 8 constitutes the blade mounting portion 3 for mounting the cutting blade 5. The front end of the propeller shaft 21 through which the pipe 22 of the handle 2 is inserted is connected to the conversion mechanism 31, and the rotation of the motor 4 is transmitted to the conversion mechanism 31 via the propeller shaft 21, and the conversion mechanism 31 moves back and forth. It is converted into a reciprocating motion in the direction and transmitted to the cutting blade 5, and as a result, the cutting blade 5 reciprocates in the front-rear direction.

The cutting blade 5 is composed of an upper blade and a lower blade, which are two upper and lower blades provided so as to be relatively reciprocating. Specifically, the cutting blade 5 is composed of a fixed blade and a movable blade so that the movable blade reciprocates back and forth with respect to the fixed blade, or is composed of two movable blades. The movable blade may be reciprocated in the opposite directions in the front-rear direction.

In the long hedge trimmer configured as described above, the long handle portion 2 is provided on the front side of the main body portion 1, and the cutting blade 5 is further provided from the head portion 8 located on the front side of the handle portion 2. Since the structure extends forward, even high branches and leaves can be easily pruned. In the pruning work, for example, the main body portion 1 and the handle portion 2 can be gripped. Then, when the cutting blade 5 bites into a thick branch during the cutting operation and the load on the motor 4 becomes excessively large, the control unit that controls the motor 4 detects it and automatically stops the motor 4. When the motor 4 stops, the cutting blade 5 also stops, and the cutting blade 5 remains bitten into the branch. A hand-cranking mechanism is used when the motor 4 is stopped in this way. That is, the hand-cranking knob 14 is pushed forward and slid to engage the engaging male portion 13a of the engaging member 13 with the engaging female portion 14a of the hand-cranking knob 14. If the engaging female portion 14a of the hand-cranking knob 14 and the engaging male portion 13a of the engaging member 13 are out of phase in the circumferential direction, even if the hand-cranking knob 14 is pushed forward, immediately. It does not engage, but in that case, the hand-cranked knob 14 is pushed forward and rotated (idle) until it is engaged. Then, the motor 4 can be manually rotated by rotating the hand-cranking knob 14 in a state where the engaging female portion 14a of the hand-cranking knob 14 is engaged with the engaging male portion 13a of the engaging member 13. The cutting blade 5 can be moved back and forth via the reduction mechanism 20, the propeller shaft 21, and the conversion mechanism 31. Therefore, the cutting blade 5 biting into the branch can be released from the branch. After the biting into the branch is eliminated, the pruning work can be resumed again.

Since the hand-cranking mechanism is provided at the hand portion in this way, even if the cutting blade 5 bites into a branch at a high position and the motor 4 stops, the cutting work can be resumed quickly, and the work efficiency can be improved. It is possible to prevent the decrease. In particular, since the hand-cranking mechanism is arranged not on the front side but on the rear side of the motor 4, the hand-cranking mechanism can be easily operated from the hand side, and the restoration work is easy.

Further, since the rear wall surface portion 12a of the bulging portion 12 is provided with a knob 14 for hand rotation, for example, while gripping the main body portion 1 with one hand, the knob 14 for hand rotation can be quickly operated with the other hand. Then, the motor 4 can be rotated to eliminate the biting state. Therefore, the pruning work can be resumed quickly and the decrease in work efficiency can be minimized.

Further, since the guard wall 17 is projected downward on the rear side of the bulging portion 12, it is possible to prevent the hand-cranking knob 14 from being inadvertently touched during normal work. It is possible to prevent malfunction. Further, by providing the guard wall 17, it is possible to prevent another object from hitting the hand-cranked knob 14. Further, the guard wall 17 also prevents dust from entering the inside through the gap between the hand-cranked knob 14 and the rear wall surface portion 12a. While the left and right guard walls 17 are formed in pairs, the space between the left and right guard walls 17 has a shape that opens downward. Therefore, even if the guard walls 17 are provided, the operation of the hand-cranking knob 14 is performed. Is easy.

In the present embodiment, the head portion 8 is provided on the front side of the handle portion 2, and the head portion 8 is provided with the conversion mechanism 31, but the conversion mechanism 31 may be provided on the main body portion 1. .. In that case, the drive transmission member through which the pipe 22 of the handle portion 2 is inserted is not the propeller shaft 21, but is configured to reciprocate back and forth. Further, although the engaging female portion 14a is provided on the hand-cranking knob 14 and the engaging male portion 13a is provided on the engaging member 13, the opposite configuration may be used. Further, although the rechargeable configuration in which the battery pack is mounted has been described in the above embodiment, the configuration may have a power cord instead of the rechargeable configuration.

1 Main body 2 Handle 3 Blade mounting 4 Motor 5 Cutting blade 6 Battery mounting 6a Strap mounting 7 Main shaft 8 Head 10 Main body housing 11 Actuating switch 12 Protruding 12a Rear wall surface 13 Engaging member (hand-rotating mechanism)
13a Engagement male part 14 Knob for hand rotation (hand rotation mechanism)
14a Engagement female part 15 Coil spring (hand rotation mechanism)
16 Recess 16a Wall surface behind the recess 17 Guard wall 18 Connection 20 Reduction mechanism 21 Propeller shaft 22 Pipe 23 Grip 30 Head housing 31 Conversion mechanism 32 Connection 33 Screw 60 Strap

Claims (2)

A main body provided with a motor, a handle extending forward from the main body, a blade mounting portion provided on the front side of the handle for mounting a cutting blade, and a cutting blade mounted on the blade mounting portion. It is a long hedge trimmer equipped with
The main body portion includes a power supply connection portion connected to a battery pack or a power cord, and a motor accommodating portion provided in front of the power supply connection portion and accommodating the motor.
A hand-cranked mechanism for manually rotating the stopped motor is provided on the rear side of the motor accommodating portion .
The long hedge trimmer is characterized in that the hand-cranked mechanism is arranged between the power supply connecting portion and the blade mounting portion along the front-rear direction. The long hedge trimmer according to claim 1, wherein the motor accommodating portion is provided with a wall surface portion orthogonal to the center line of the motor at a position on the rear side of the motor, and the wall surface portion is provided with a knob for manual rotation.

Images