JP2017070228A - Pruning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pruning machine which has excellent operativity and which can reduce working load as well as reduce the bad influence on the appearance of the vegetation after cutting by suppressing wrist blur, in a single-edge-type pruning machine, which can be grasped with one hand, with a cutting blade on the side.SOLUTION: A pruning machine comprises a body part which houses a drive source, a power transmission mechanism or a power conversion mechanism, and a cutting blade part provided at a tip side of the body part and linked to the power transmission mechanism or the power conversion mechanism. The body part comprises a bulging part which houses the power conversion mechanism in the tip side, and a handle part which houses the power transmission mechanism and the drive source at a rear end of the bulging part, the cutting blade part has a configuration in which a plurality of pruning blades are arranged in only one side in the longitudinal direction, the bulging part has a raised part at an upper part thereof, and the raised part has a driving switch of the drive source.SELECTED DRAWING: Figure 1

Description

  The present invention is an electric mower for trimming hedges, pruning trees, pruning tea trees, etc., and connecting a long clipper-type trimming blade from a drive source via a power conversion mechanism. The present invention also relates to a single blade type trimming machine in which trimming blades made up of a plurality of fixed blades and movable blades are arranged only on one side along the longitudinal direction.

Conventionally, various trimming machines are used to perform efficient trimming in the above-described hedge trimming and the like. Among such trimming machines, a single-edged type trimming machine can have a narrow configuration while having a large number of trimming blades, and has a reduced weight compared to the double-edged type.
However, even such a single blade type trimming machine has a drive source, a power conversion mechanism, and a long trimming blade, and is further caused by generation of vibration from the drive source and cutting of branches and leaves when used. Since a load in an indefinite direction may occur, a configuration of a trimming machine has been devised that reduces the work load and can be used with one hand.

  As such a one-blade type trimming machine that can be gripped with one hand, for example, a fixed blade having a comb blade shape on one side along the front-rear length direction, and a plurality of movable elements that are driven in a repulsive direction with respect to the fixed blade A clipper-type cutting blade portion having a single-blade structure provided with a blade or a comb blade-like movable blade that is horizontally driven in the front-rear direction is projected forward from the front end portion of the housing, and a motor is provided in the housing. The rotational power generated by the motor is reduced by a gear set provided at the front portion in the housing and converted into horizontal rotational motion. Further, the horizontal rotational motion is converted into forward / backward motion by the crank arm. In the horticultural hair clipper device having a power transmission structure that drives the movable blade of the cutting blade portion in the reed direction through forward and backward movement, the housing includes a bulging portion that constitutes a front portion, and a length that follows the bulging portion. Midway A short hollow substantially thick bar shape provided with a handle portion corresponding to a portion extending from the rear end portion to the rear end portion, and a power switch of the motor is provided in the handle portion, and the gear in the bulge portion A set is provided, and the motor is disposed at a position behind the middle portion of the length in the housing in a lateral orientation along the length direction of the housing, and includes the cutting blade portion. A horticultural hair clipper device characterized in that the center of gravity of the entire device is positioned in the middle part of the length, and the middle part of the length becomes an optimum one-hand holding part (for example, Patent Document 1). See).

  Also, it is not mainly a single-edged mower with a cutting blade on the side, but as a hand-held power tool that can be gripped with one hand, a drive unit with a motor in the rear and a workpiece to be processed in the front A gripping part with a built-in transmission shaft for transmitting the driving force of the motor to the processing part between the head part having the processing part to be used and the gripping part being gripped and used substantially horizontally The gripping part has a gripping body part and a push button type switch for operating the motor, and the switch has a switch body and an operation member and is arranged at the front part on the lower surface of the gripping part, The transmission shaft is supported horizontally by the gripping portion, and the front portion of the gripping portion is formed in an oblique shape that is lower than the rear portion, so that a storage space is formed inside the lower portion of the front portion of the gripping body portion. The switch body is in the storage space. There is a known hand-held power tool characterized in that the operation member is retractably provided in the storage space and the center of gravity is located behind the operation member in the grip portion (for example, Patent Document 2). reference.).

Registered Utility Model No. 3196477 Japanese Patent No. 45524168

The device according to Patent Document 1 includes a motor power switch on a handle portion (particularly the rear end side) behind the bulging portion, and grips the front end side of the handle portion and can be held with one hand. It is.
At this time, the position held with one hand is the middle part of the length of the handle.
In order to stop the motor from a state where the trimming machine is gripped with one hand and used, it is necessary to turn off the power switch with the other hand. For this reason, ON / OFF of a switch cannot be switched by one-handed operation in a timely manner.
This has a problem from the viewpoint of safety because, for example, the cutting blade portion may accidentally contact other objects while being driven and may damage the other objects.

  On the other hand, the invention according to Patent Document 2 is not mainly a single blade type trimming machine having a cutting blade on the side, but a push button type switch unit is arranged at the front part of the lower surface of the gripping unit, and the transmission shaft is A storage space is formed in the lower inner side of the front part of the gripping body part by forming the front part of the gripping part in an inclined shape that is supported horizontally by the gripping part and lower than the rear part. Therefore, it is considered that the switch part can be turned on and off by one-hand operation, and the above-mentioned problem from the viewpoint of safety does not occur.

  Therefore, the blade of the electric tool according to Patent Document 2 is a single blade having a cutting blade on the side according to Patent Document 1, or the mechanism of Patent Document 2 is adopted in the trimming machine according to Patent Document 1. Therefore, it is also considered that a one-handed type trimming machine having a trimming blade on the side can realize a trimming machine that can be safely held by one hand.

However, including the push button type switch that is the feature of Patent Document 2 and the grip structure of Patent Documents 1 and 2 (that is, the structure in which the grip portion is gripped by the thumb from above and the other four fingers from below), If it is going to implement | achieve the single blade type | mold trimming machine which has a cutting blade in a side, operation will become very difficult to perform.
In other words, since the cutting operation is advanced while being laterally adjusted in a state of being held so as to hang downward, blurring tends to occur in the rotation direction around the wrist (the left and right direction of the blade edge), in order to suppress this, It is easy to put a burden on the wrist.
In addition, the occurrence of blurring in the rotational direction around the wrist adversely affects the appearance of the plant after cutting.

  The present invention has been made in view of the above circumstances, and in a single-edged trimming machine having a cutting blade on the side that can be gripped with one hand, the operability is good and the work load is further reduced. An object of the invention is to provide a trimming machine that can reduce the adverse effects on the appearance of plants after trimming by suppressing wrist shake.

  A main body for storing a drive source, a power transmission mechanism or a power conversion mechanism, and a cutting blade provided on the distal end side of the main body and connected to the power transmission mechanism or the power conversion mechanism; A bulging portion for storing the power conversion mechanism on the front end side, and a handle portion for storing a power transmission mechanism and a driving source at the rear end of the bulging portion, and the cutting blade portion is located on one side along the longitudinal direction. In the trimming machine having a configuration in which a plurality of trimming blades are arranged in line only, the bulging portion includes a bulging portion on the upper portion, and the bulging portion includes a drive switch button of a driving source. The trimming machine to be used is a means for solving the above problems.

  In addition to the configuration of the invention described above, the present invention further includes an inclined portion inclined upward from the lower rear edge of the bulging portion to the lower front end of the handle portion, and the raised portion has an elliptical outline or an oval outline in plan view A mower having a shape and having a side surface of the raised portion that is a pressing surface that can be pressed by a thumb is a means for solving the above-described problems.

  Further, according to the present invention, in addition to any one of the above-described configurations, a trimming machine characterized in that the raised portions are left-right symmetric is a means for solving the above problems.

  In addition to the configuration of any one of the above inventions, the present invention is characterized in that the inclination angle α formed by the longitudinal line of the cutting blade portion and the horizontal plane is 1 ° or more and 15 ° or less upward. Is a means for solving the above problems.

  Further, according to the present invention, in addition to the configuration of any of the above inventions, a trimming machine characterized in that the position of the center of gravity of the trimming machine is located at the bulging portion is used as means for solving the above-described problem.

  According to the present invention, since the raised portion is provided with the raised portion at the upper portion, and the raised portion is provided with the drive switch button of the drive source, the switch is switched with the thumb while holding the handle portion with one hand. In the trimming machine in which a plurality of trimming blades are arranged only on one side, the convenience and safety can be greatly improved.

  Further, according to the present invention, on the premise of the above configuration, the inclined portion is inclined upward from the lower rear edge of the bulging portion to the lower front end of the handle portion, and the raised portion has an elliptical outline or an oval outline in plan view Since the ridge has a shape and the side surface of the raised portion is a pressing portion that can be pressed by the thumb, the wrist surface is pressed by pressing the pressing surface with the thumb while holding the index finger or the middle finger from below the front end of the handle. Is greatly suppressed. As a result, the burden on the wrist is reduced, and the mowing machine can be easily moved to the side, so that the appearance of trimming can be reduced.

  Further, according to the present invention, on the premise of any one of the above configurations, since the raised portion is left-right symmetrical, it can be gripped with either the right hand or the left hand regardless of the dominant hand. Also, it can be made more advantageous in that the operational effect of any of the above-described trimming machines can be achieved.

  Further, according to the present invention, on the premise of any one of the above configurations, since the inclination angle α formed by the longitudinal line of the cutting blade portion and the horizontal plane is 1 ° or more and 15 ° or less upward, In addition to the operational effects of the mowing machine, the cutting edge tends to face downward due to the weight of the mowing machine during work, and this phenomenon can be mitigated. It can be more advantageous when finishing the contour.

  Also, according to the present invention, on the premise of any one of the above configurations, since the center of gravity of the trimming machine is positioned at the bulging portion, in addition to exerting any of the above effects, the thumb is used as the pressing portion. In a state where the ridges are held along or in a state where the raised portion is sandwiched between the thumb and the index finger, the gripping position and the center of gravity are close to or coincide with each other, and the operability of the trimming machine can be further improved.

BRIEF DESCRIPTION OF THE DRAWINGS (a) Top view of a trimming machine which concerns on the Example of this invention, (b) Plane explanatory drawing which shows the state which hold | gripped the trimming machine. BRIEF DESCRIPTION OF THE DRAWINGS (a) Front view of a trimming machine concerning the Example of this invention, (b) Front explanatory drawing which shows the state which hold | gripped the trimming machine. It is explanatory drawing which shows the internal structure of the bulging part and the 1st holding part in the main-body part of the trimming machine which concerns on the Example of this invention. It is a cross-sectional schematic diagram which shows the internal structure of the bulging part and the 1st holding part in the main-body part of the trimming machine which concerns on the Example of this invention.

  Hereinafter, a trimming machine according to an embodiment of the present invention will be described. The present invention is not limited to the configuration shown below, and includes various modifications, design changes, and the like without departing from the technical idea of the present invention.

  As shown in FIGS. 1 to 5, the trimming machine T according to the embodiment of the present invention is provided in the main body 1, the cutting blade 2 provided in front of the main body 1, and the rear of the main body 1. A power cord 3 is provided.

The main body 1 has a bulging portion 10 on the front side and a handle portion 11 on the rear side. The handle portion 11 has a front portion as a first grip portion 110, a central portion as a drive source storage portion 112, and a rear portion as a second grip portion 111.
A motor 14 (drive source) is stored in the drive source storage unit 112 in the handle 11. Electric power is supplied from the power cord 3 to the motor 14 of the drive source storage section 112 through the second gripping section 111 of the handle section 11. A speed reduction mechanism (planetary gear 13) and a first transmission shaft 160 are provided between the shaft portion of the motor 14 and the power conversion mechanism 16 of the bulging portion 10 through the first gripping portion 110. The output from the motor 14 is coaxially decelerated by a reduction mechanism and transmitted to the power conversion mechanism 16 stored in the bulging portion 10 by the first transmission shaft 160. The power conversion mechanism 16 operates the movable blade 22 via the rod 20 in the cutting blade portion 2, and the fixed blade 23 and the movable blade 22 can be cut.

  The bulging portion 10 of the trimming machine T in the present embodiment includes a raised portion 100 on the upper side, and a switch for switching ON (operation) and OFF (stop) of the operation of the motor 14 at the upper portion of the raised portion 100. Part 102 is provided. Further, inside the bulging portion 10, a switch body 102 a in the switch portion 12, a power conversion mechanism 16, and a fixed blade holding portion 101 that holds the base end of the fixed blade forming body 21 are provided.

  The raised portion 100 in this embodiment is a portion that occupies the upper portion of the bulged portion 10 and has a hill shape in which a substantially elliptical column-shaped side circumferential surface that is elongated in the front-rear direction is gently inclined to stand.

  The elongated oval contour of the raised portion 100 is such that the left and right width of the raised portion 100 is less than about 5 cm, and the rear end portion in plan view is in a state where the thumb f1 is in contact with the pressing portion 104. In addition, the width of the finger crotch between the thumb f1 and the index finger f2 is configured with a width dimension and an arcuate contour that do not excessively press.

  The raised portion 100 in this embodiment is formed symmetrically, and its side surface functions as a pressing portion 104 that can be pressed by contacting the thumb f1. Since the raised portion 100 is bilaterally symmetric, either one of the corresponding side surfaces functions as the pressing portion 104 when the raised portion 100 is gripped with either the right hand or the left hand.

Further, in the present embodiment, the raised portion 100 has a substantially elliptical column-shaped side peripheral surface that is elongated in the front-rear direction, and is inclined and gently erected, so that the raised portion 100 is supported by the thumb f1 and the index finger f2. It is possible to make it fit along.
As a result, the raised portion 100 of the bulging portion 10 is sandwiched between the thumb f1 and the index finger f2 (in this case, the pressing portion 104 is pressed with the thumb f1), and the middle finger f3, the third finger, and the little finger 3 are used. The first gripping part 110 can be gripped with a finger, or the gripping part can be gripped with the other four fingers while pressing the pressing part 104 of the bulging part 10 with the thumb f1. is there.

The switch part 12 for ON / OFF operation of driving of the motor 14 provided in the upper part of the bulging part 10 is a so-called push cancel type switch part 12.
The switch unit 12 according to the present embodiment includes a first switch button 103 for turning on the operation of the motor 14 as a drive switch button for performing ON / OFF switching operation of the drive of the motor 14, and the first switch A second switch button 105 provided mainly adjacent to the rear of the button 103 for turning off the operation of the motor 14 is provided.

The first switch button 103 is configured to be slidable substantially forward against the built-in first coil spring 103b. The first switch button 103 includes a rear piece and a first locking portion 103c formed on the rear piece. A recess 103 a is formed on the rear end side of the first switch button 103.
The second switch button 105 is configured to be able to be pushed substantially downward against the built-in second coil spring 105a. The second switch button 105 has a through hole 105c through which the rear piece of the first switch button 103 passes, and the second switch button 105 can be locked with the first locking portion 103c in the through hole 105c. Two locking portions 105b are provided. The upper end of the second switch button 105 is higher than the height position of the recess 103 a of the first switch button 103.
In a normal stop state, the first latching portion 103c and the second latching portion 105b are in a latched state, and the backward biasing force by the first coil spring 103b, the upward biasing by the second coil spring 105a. It is a configuration in which power is continuously acting.

  Further, with the above-described configuration, in a normal stop state, the first locking portion 103c and the second locking portion 105b are locked and the first coil spring 103b is biased backward, Since the upward biasing force by the two-coil spring 105a is acting, unless the second switch button 105 is pushed in and the first switch button 103 is not slid forward, the switch unit 12 is turned on. Absent. This ensures safety against inadvertent operation.

  The operation of the motor 14 is turned on by sliding the first switch button 103 forward while pressing the front first switch button 103 and the rear second switch button 105. Here, the concave portion 103a is formed on the rear end side of the first switch button 103, and the upper end of the second switch button 105 is made bulkier than the concave portion so as to be adjacent to the concave portion 103a. Thus, the motor 14 can be turned on.

The operation of the motor 14 can be turned off by pressing only the rear second switch button 105. By pushing the second switch button 105, the first locking portion 103c and the second locking portion 105b are released, and the first switch button 103 moves rearward by the bias of the first coil spring 103b, and the switch portion 12 Is turned off.
Similar to the ON operation of the switch unit 12, the OFF operation of the motor 14 can be performed with one thumb f1.

  In addition, when it is required that the operation can be stopped urgently, the second switch button 103 adjacent to the recess 103a of the first switch button 103 is higher than the recess 103a, so that the second switch button 103 is visually recognized. Without stopping, it is possible to easily perform a stop operation (ie, an operation of pressing the second switch button 103) with the sense of a finger.

  The power conversion mechanism 16 has a first bevel gear 161 provided at the tip of the first transmission shaft 160 and a second bevel gear 163 provided at the tip of the second transmission shaft 162. The first transmission shaft 160 and the second transmission shaft 162 are held on each surface of a metal bent plate member 164 having a bending angle of 88 °, and the bevel gears mesh with each other at an intersection angle of 88 °.

The first transmission shaft 160 is held by a first holding cutout 164b formed on one plate portion sandwiching the bending line 164a, and the second transmission shaft 162 is held on a second holding cutout portion 164c formed on the other plate portion. Retained.
Further, the second transmission shaft 162 in the power conversion mechanism 16 extends substantially downward. The lower end of the second transmission shaft 162 is a cam shaft.

  The rod 20 for reciprocating the movable blade 22 has an annular portion 20a having an elliptical ring shape at the base end portion. A cam member in the power conversion mechanism 16 is provided in the annular portion 20a, and a part of the inner surface of the annular portion 20a comes into contact with the cam member by the rotation of the cam member, so that the annular portion 20a becomes the cam member. The entire rod 20 that is driven and has the annular portion 20a reciprocates linearly in the longitudinal direction.

Further, the inner surface of the main body 1 has ribs 12 for positioning the constituent members of the power conversion mechanism 16, the motor 14, the switch main body 102a, wirings related thereto, the rod 20, and the like. The wiring connected to the switch body 102a is guided to the rear of the handle portion 11 by the rib 12 in order to connect to the motor 14 located at the rear.
Further, the bent plate material 164 is fixed at the installation position by the rib 12 and maintains a constant angle (88 °) of the cross axis. Even if a load that separates the first bevel gear 161 and the second bevel gear 163 due to cutting by the cutting blade portion 2 is generated, this is greatly suppressed by the reinforcing effect of the bent plate material 164 and the rib 12, Durability can be imparted, and a constant angle of the cross axis can be maintained over a long period of time.

A fixed blade holding portion 101 that holds the base end of the fixed blade forming body 21 is provided below the bulging portion 10.
The fixed blade holding part 101 has an inclined surface so as to be held in a state where it is inclined 2 ° upward with respect to the horizontal. With this configuration, the inclination angle of the rod 20 connected to the movable blade 22 coincides.

  The cutting blade part 2 according to the present embodiment includes a fixed blade forming body 21 formed by integrally arranging a plurality of fixed blades 23, a rod 20, and a movable blade 22. The movable blade 22 is pivotally attached to the fixed blade holding portion 101 using the fixed blade side shaft so that the movable blade 22 is positioned between the fixed blades arranged in the fixed blade forming body 21. The base end side of the movable blade 22 is pivotally attached to the movable blade rod 20 using the movable blade side shaft portion.

  In the present embodiment, an inclined portion 113 that is inclined upward from the lower rear edge of the bulging portion 10 to the lower front end of the handle portion 11 is provided. By forming the inclined portion 113, it becomes easier to guide the position of the thumb f1 onto the bulging portion 10 by bringing the three or four fingers gripping the first gripping portion 110 closer to the bulging portion 10. The operation of pressing the pressing portion 104 of the raised portion 100 with the thumb f1 while holding the gripping portion with three or four fingers becomes better.

  In the present embodiment, the rear end of the handle portion 11 is the second gripping portion 111, so that the gripping with both hands can be performed well even when gripping with both hands as necessary. it can.

  Moreover, in the said Example, since the cutting blade part 2 was made into the structure which inclined 2 degrees with respect to the horizontal direction, the cutting edge T becomes easy to face downward with the weight of the cutting machine T at the time of work, and it is easy to maintain horizontal in general. Effect is obtained. Further, in combination with the configuration including the bulging portion 100, the bulging portion 100 in the bulging portion 10 having a large weight distribution is pressed with the thumb f1, or the bulging portion 100 is sandwiched between the thumb f1 and the index finger f2. The inclination of the base end of the cutting blade portion 2 attached to the portion 10 can be easily adjusted, and the operation can be synergistically improved.

  In addition, it is more advantageous when finishing the trimming target to a curved contour such as a spherical surface by inclining the cutting blade portion 2 downward by inverting the top and bottom while holding the trimming machine T. Can do.

  In the present invention, the above effect can be obtained when the inclination angle is 1 ° or more and 15 ° or less. In addition, when the angle is less than 1 °, the effect compared with the case where the inclination angle is not substantially provided is not recognized, and when the inclination angle exceeds 15 °, it is used in an inverted state as described above. The tendency to be difficult to control increases.

  Further, in the present embodiment, the raised portion 100 is formed to be bilaterally symmetric, but the present invention is not limited to this configuration, and for example, it can also be bilaterally asymmetric. In this case, the shape can be optimal for left-handed and right-handed. In the case of left-right symmetry as in the embodiment, regardless of whether it is left-handed or right-handed, the above-mentioned effects of the present invention can be exhibited even if used with either the left or right hand. Can be excellent.

  Further, in the present invention, the inclined portion can be inclined including a curved surface as shown in the embodiment, or can be inclined as a whole as a plane.

f1 thumb f2 index finger f3 middle finger T trimming machine 1 body part 10 bulging part 100 raised part 101 fixed blade holding part 102 switch part 102a switch body 103 first switch button 103a recessed part 103b first coil spring 103c first locking part 104 pressing Part 105 Second switch button 105a Second coil spring 105b Second locking part 105c Through hole 11 Handle part 110 First grip part 111 Second grip part 112 Drive source storage part 113 Inclination part 12 Rib 13 Planetary gear (Deceleration) Machine)
14 Motor (drive source)
16 Power Conversion Mechanism 160 First Transmission Shaft 161 First Bevel Gear 162 Second Transmission Shaft 163 Second Bevel Gear 164 Bending Plate Material 164a Bending Line 164b First Holding Notch 164c Second Holding Notch 2 Cutting Blade 20 Rod 20a Annular part 21 Fixed blade forming body 22 Movable blade 23 Fixed blade 3 Power cord

Claims (5)

A main body for storing a drive source, a power transmission mechanism or a power conversion mechanism, and a cutting blade provided on the distal end side of the main body and connected to the power transmission mechanism or the power conversion mechanism; A bulging portion for storing the power conversion mechanism on the front end side, and a handle portion for storing a power transmission mechanism and a driving source at the rear end of the bulging portion, and the cutting blade portion is located on one side along the longitudinal direction. In a trimming machine having a configuration in which a plurality of trimming blades are arranged only in
The bulging portion includes a raised portion at an upper portion thereof, and the raised portion includes a drive switch button of a drive source.   It has an inclined part that is inclined upward from the lower rear edge of the bulging part to the lower front end of the handle part, and the raised part has an elliptical or oval outline shape in plan view, and the side surface of the raised part is pressed by the thumb The pruning machine according to claim 1, further comprising a pressing portion that enables the operation.   The trimming machine according to claim 1 or 2, wherein the raised portion is symmetrical.   4. The trimming machine according to claim 1, wherein an inclination angle α formed by a longitudinal line of the cutting blade part and a horizontal plane is 1 ° or more and 15 ° or less upward. 5. The trimming machine according to claim 1, wherein the center of gravity of the trimming machine is located at the bulging portion.

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