WO2019202684A1 - Portable powered mower - Google Patents

Portable powered mower Download PDF

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Publication number
WO2019202684A1
WO2019202684A1 PCT/JP2018/016008 JP2018016008W WO2019202684A1 WO 2019202684 A1 WO2019202684 A1 WO 2019202684A1 JP 2018016008 W JP2018016008 W JP 2018016008W WO 2019202684 A1 WO2019202684 A1 WO 2019202684A1
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WO
WIPO (PCT)
Prior art keywords
handle
operation tube
grip portion
portable power
end side
Prior art date
Application number
PCT/JP2018/016008
Other languages
French (fr)
Japanese (ja)
Inventor
正範 小林
Original Assignee
有限会社小林産業
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 有限会社小林産業 filed Critical 有限会社小林産業
Priority to PCT/JP2018/016008 priority Critical patent/WO2019202684A1/en
Publication of WO2019202684A1 publication Critical patent/WO2019202684A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/835—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes
    • A01D34/90—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes for carrying by the operator

Definitions

  • the present invention relates to a portable power mower.
  • a portable power mower as a tool for removing weeds growing on the bank of the field.
  • a general configuration of a portable power mower is disclosed in Patent Document 1, for example.
  • a power source such as a small gasoline engine is connected to the proximal end of the operation tube, a rotary blade is supported at the distal end of the operation tube, and the rotation output of the small gasoline engine is inserted into the operation tube. It is transmitted to the rotary blade via the transmission shaft, and this rotary blade is rotated.
  • the operation tube is provided with a handle for an operator to hold with both hands and swing the operation tube left and right.
  • the handle has a substantially U-shape that extends to the left and right of the operation tube and has its tip bent upward.
  • the worker positions the rotary blade along the ground, operates the handle gripped with both hands, swings the operation tube left and right, and performs mowing work.
  • the handle since the handle extends from the operation tube to the left and right, it is convenient to hold the handle and swing the operation tube from side to side. However, it is not suitable for lifting or lowering the tip of the control tube when mowing the front-lowering or front-up slope, and keep the operation tube in the front-up or front-down position. However, continuing the mowing operation requires a great deal of labor. Furthermore, in order to maintain the operation tube in a forward-downward posture, the body becomes leaning forward and tends to get tired. As described above, the conventional portable power mower has not always been excellent in operability.
  • the present invention has been conceived under the circumstances described above, and in a portable power mower having a power source on the proximal end side of the operation tube and a rotary blade on the distal end side, the operation tube is left and right. It is an object of the present invention to make it easy to perform an operation of swinging in a direction and an operation of tilting the operation tube in the vertical direction or maintaining the tilted state.
  • the present invention employs the following technical means.
  • the portable power mower provided by the present invention includes an operation tube, a power source connected to the proximal end side of the operation tube, supported on the distal end side of the operation tube, and rotated by the power of the power source.
  • a portable power mower having a rotary blade, wherein the operation tube is provided with a first handle and a second handle, and the first handle is a base end of the operation tube. And the second handle is provided so as to extend generally upward in front of the first handle.
  • the first handle is provided with a first grip portion on an upper end side thereof, and the first grip portion is inclined forward.
  • the inclination of the first grip portion is 30 to 60 °, more preferably 40 to 50 ° with respect to the vertical line to the operation tube.
  • an adjustment lever for adjusting the output of the power source is provided on the tip side of the first grip portion.
  • the second handle is provided with a second grip portion on a tip end side thereof, and the second grip portion extends in a lateral direction above the first grip portion. Is formed.
  • the second grip portion is positioned so as to be displaced to the left with respect to the first grip portion.
  • the second handle includes an upward extending portion that extends upward from the operation tube, a counterclockwise bending portion that curves counterclockwise following the upper end of the upward extending portion, A substantially horizontal U-shaped curved portion that curves clockwise and forms a substantially horizontal U-shape following the counterclockwise curved portion, and an upper lateral extension portion of the substantially horizontal U-shaped curved portion is The second grip portion is formed.
  • the rotary blade includes a holding member that is attached to a rotary blade attachment shaft and is rotated, a proximal end side is held by the holding member, and a distal end side is extended radially outward of the holding member.
  • a holding mechanism that holds the cord-like cutting member, and a guide member that can rotate relative to the holding member about the rotation axis at the lower part of the holding member.
  • FIG. 1 is a schematic overall perspective view of an example of a portable power mower according to the present invention. It is a partial cross section side view of an example of the portable power mower of the present invention.
  • FIG. 3 is an enlarged view of a main part of FIG. 2. It is the IV-IV arrow line view of FIG. It is a figure which shows an example of the rotary blade for mowers used for the portable power mower shown in FIGS. 1 and 2, and corresponds to the view taken along the line VV in FIG.
  • FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is the VII-VII sectional view taken on the line of FIG. It is the VIII-VIII sectional view taken on the line of FIG. It is the IX-IX sectional view taken on the line of FIG.
  • FIG. 10 is a sectional view taken along line XX in FIG. 9.
  • FIG. 8 is an operation explanatory diagram and corresponds to a cross section taken along line VIII-VIII in FIG. 6.
  • FIG. 1 to 10 show a portable power mower B (hereinafter sometimes simply referred to as “mower B”) according to an embodiment of the present invention.
  • a small gasoline engine 10 as a drive source is connected to the proximal end side of the operation tube 12, and a rotary blade A is connected to the distal end side of the operation tube 12. Is supported.
  • the rotation output of the power source is transmitted to a rotary blade mounting shaft 14 that protrudes from a gear box 16 with a built-in speed reduction mechanism 16a supported on the distal end side of the operation tube 12 via a transmission shaft 11 to be described later. It has become.
  • male screws 14a and 14b are formed on the base end side large diameter portion and the distal end side small diameter portion of the rotary blade mounting shaft 14, respectively, and a metal rotary blade holder 17 is screwed onto the base end side male screw 14a. ing.
  • the mower B according to the present embodiment is configured so that the support angle of the rotary blade A can be changed by rotating the operation lever 18 as follows.
  • the operation tube 12 has a distal end side second portion 12 b that is always on the distal end side by a coil spring 19 inserted into the operation tube 12 with respect to the proximal end side first portion 12 a. Combined to be stretchable while being energized.
  • a flexible tube 20 having a distal end extending from the distal end of the operation tube 12 is inserted into the operation tube 12, and a transmission shaft 11 having at least a distal end is inserted into the flexible tube 20. Yes.
  • the rotational driving force of the transmission shaft 11 is transmitted to the rotary blade mounting shaft 14 protruding from the gear box 16.
  • the operation lever 18 is rotatably supported by the second portion 12b while being given a certain resistance.
  • the operation lever 18 is formed with a reel portion 18a, and by rotating the operation lever 18 back and forth, the other end of the cable 21 having one end connected to the first portion 12a is wound or fed out to the reel portion 18a. You can do that.
  • the second portion 12b By rotating the operation lever 18 in the cable winding direction, the second portion 12b can be retracted in the proximal direction of the operation tube 12 against the elasticity of the coil spring 19, and the total length of the operation tube 12 can be shortened.
  • the second portion 12b can be extended in the direction of the distal end of the operation tube 12 by the elasticity of the coil spring 19 by rotating in the cable feeding direction, and the entire length of the operation tube 12 can be extended.
  • An arm 12c extending obliquely downward is fixedly connected to the distal end portion of the second portion 12a of the operation tube 12, and the gear box 16 is centered on the lateral axis 22 at the distal end of the arm 12c. It is rotatably supported. Since the total length of the flexible tube 20 and the transmission shaft 11 inserted therein is constant, when the total length of the operation tube 12 is extended by the operation of the operation lever 18, the flexible tube 20 is connected to the operation tube 12. When drawn into the interior and the entire length of the operation tube 12 is shortened, the flexible tube 20 is pushed out from the tip of the operation tube. As a result, the gear box 16 and the rotary blade A supported by the gear box 16 rotate about the lateral axis 22, thereby changing the angle of the rotary blade A with respect to the operation tube 12 as desired.
  • the operation tube 12 is provided with a first handle 230 and a second handle 240 for an operator to hold and operate the operation tube 12.
  • the first handle 230 is for the operator to hold with the right hand, and is provided so as to protrude upward in the vicinity of the base end portion of the operation tube 12, that is, in the vicinity of the connection portion with the small gasoline engine 10. It has been. More specifically, the first handle 230 is provided via a bracket 231 attached so as to hold the first portion 12a of the operation tube 12 as clearly shown in FIG.
  • the first handle 230 has a first grip portion 233 extending linearly at a length and thickness suitable for an operator to hold on the upper tip side of the pipe member 232. Further, the pipe member 232 extends upward and is inclined forward, and therefore the first grip portion 233 is positioned in a forward inclined posture above the operation tube 12.
  • the inclination angle ⁇ of the first grip portion 233 is 30 to 60 °, preferably 40 to 50 ° with respect to the vertical line t with respect to the operation tube 12.
  • an adjustment lever device (throttle lever) 234 for adjusting the rotation speed of the rotary blade A by adjusting the output of the small gasoline engine 10 adjacent to the upper portion of the first grip portion 233 is provided on the first handle 230. Is provided. By providing the adjustment lever device 234 at such a position, the adjustment lever device 234 can be operated while holding the first grip portion 233.
  • the second handle 240 is for an operator to hold with the left hand, and is provided so as to extend generally upward in front of the first handle 230. More specifically, the second handle 240 is provided via a bracket 241 attached so as to hold the second portion 12b of the operation tube 12 as clearly shown in FIGS. ing.
  • the bracket 241 also functions as a member that receives the front end of the coil spring 19.
  • the second handle 240 includes an upward extending portion 242a extending upward, and a counterclockwise bending portion 242b that curves counterclockwise when viewed from the rear following the upper end of the upward extending portion 242a.
  • a pipe member 242 having a substantially horizontal U-shaped curved portion 242c that is curved clockwise when viewed from the rear, and that forms a substantially horizontal U-shape following the counterclockwise curved portion 242b.
  • a part of 242 is covered with a cylindrical elastic member 243a such as synthetic rubber, and a second grip portion 243 having a thickness suitable for an operator to hold is provided.
  • the substantially horizontal U-shaped curved portion 242c is entirely covered with the cylindrical elastic member 243a.
  • the substantially horizontal U-shaped upper lateral extending portion 242cc functions as the second grip portion 243 in the present invention.
  • the second grip portion 243 is positioned higher than the first grip portion 233 and preferably extends in the lateral direction.
  • the second grip portion 243 is displaced to the left with respect to the first grip portion 233. It is desirable.
  • the rotary blade A is configured as follows in this embodiment.
  • the rotary blade A is attached to the rotary blade attachment shaft 14 and rotated, and the holding member 100 holding the cord-like cutting member 40, and the holding member. 100, a guide member 500 capable of rotating relative to the rotation axis (same axis as the rotary blade mounting shaft 14).
  • the radial direction means the radial direction of the holding member 100 or the rotary blade A.
  • the holding member 100 includes a holding mechanism 200 that holds the proximal end portion of the cord-shaped cutting member 40.
  • the holding member 100 is generally circular in plan view, and has an upper support plate portion 110 that is provided with a boss portion 102 having a center hole 101 at the center and in which a plurality of concave-curved cutout portions 111 are formed on the outer periphery.
  • the holding mechanism 200 is provided below the outer peripheral region of the upper support plate portion 110.
  • the holding member 100 can be configured by resin integral molding except for portions to be generated with metal for strength maintenance, such as hanging portions 220a, 220b, 220c, and 220d to be described later and attachment members thereof.
  • a lower part of the upper support plate part 110 has a substantially same outer diameter as that of the upper support plate part 110 through a connecting wall part 120 that is positioned so as to surround the boss part 102 and has a predetermined height in the vertical direction. And a lower support plate portion 130 that extends outward from the connecting wall portion 120 in a horizontal flange shape.
  • the holding mechanism 200 is formed on the horizontal upper surface (support wall) of the lower support plate portion 130.
  • the lower support plate 130 is divided into two in the circumferential direction, and the two holding mechanisms 200 having the same configuration are provided.
  • the holding mechanism 200 is arranged in the circumferential direction of the connecting portion 210 to which the large-diameter portion 41 at one end of the cord-like cutting member 40 is connected and the lower support plate portion 130, and the cord-like cutting member 40 is wound around. It basically has a plurality of hanging portions 220a, 220b, 220c, and 220d.
  • the cord-shaped cutting member 40 for example, one end of a nylon cord is crushed by heat or knotted to form a large-diameter portion, or a nylon cord material cut to a predetermined length A commercially available product having a cylindrical large-diameter portion 41 formed at one end thereof is used.
  • the connecting portion 210 is formed on the lower support plate portion 130 facing upward by providing a recessed portion 112 on the outer periphery of the upper support plate portion 110.
  • the wall portion 211 that is also connected to the portion 120 is erected, and the wall portion 211 is formed by providing a slit 212 that opens on the upper surface thereof.
  • the slit 212 has a width that allows the cord-shaped cutting member 40 to pass therethrough and prevents the large-diameter portion 41 from passing therethrough.
  • the wrapping portions 220a, 220b, 220c, and 220d are the first wrapping portions 220a that are located at a predetermined interval in the circumferential direction of the rotary blade A with respect to the connecting portion 210. And four hung portions including second, third, and fourth hung portions 220b, 220c, and 220d that are located at predetermined intervals in the circumferential direction with respect to the first hung portion 220a. It is configured.
  • Each of the hanging portions 220a, 220b, 220c, and 220d has a drum shape having an outer circumferential groove having a concave cross section on a support shaft 222 that is erected vertically to the upper surface (support wall) of the lower support plate portion 130.
  • the roller member 221 is supported.
  • the roller-like member 221 is supported by the cantilevered support shaft 222 whose lower end is fixed to the lower support plate portion 130, and the lower surface of the upper support plate portion 110 and each roller-like member 221 are supported.
  • a gap S is formed between the upper end so that the cord-like cutting member 40 can pass in the lateral direction.
  • the notch 111 is formed at the upper position of each roller-like member 221 in the upper support plate portion 110 so that each roller-like member 221 faces in plan view.
  • the holding mechanism 200 also includes an attachment facilitating means 300 that facilitates the attachment of the cord-like cutting member 40, and the attachment facilitating means 300 includes a plurality of hanging portions 220a, 220b, 220c, and 220d.
  • the connecting wall portion 120 includes a protrusion 121 that protrudes between adjacent winding portions 220a, 220b, 220c, and 220d (the protrusion 121 corresponds to each roller in the upper support plate 110).
  • the protrusions 113 formed on the outer periphery of the upper support plate 110 are provided by providing the notches 112 at the upper position of the shaped member 221, and the protrusions are provided.
  • 121 or the connecting wall 120 is dug inward in the radial direction so that the bottom 122a has a groove 122 extending linearly from a position behind the first hook 220a to a position behind the fourth hook 220d. Forming.
  • the bottom 122a of the groove 122 does not necessarily have to be linear, and may be a groove formed deeper as long as the straight line L is included.
  • the vertical width of the groove 122 corresponds to the diameter of the cord-like cutting member 40, and is preferably set to a vertical width that can restrain the cord-like cutting member 40 fitted in the groove 122 in the vertical direction.
  • the holding mechanism 200 also prevents the cord-like cutting member 40 hung around the hung portions 220a, 220b, 220c, 220d from being detached from the 220a, 220b, 220c, 220d.
  • One detachment prevention means 410 and a second detachment prevention means 420 are provided.
  • the first detachment preventing means 410 is a protrusion formed on the outer periphery of the upper support plate portion 110 by providing a notch portion 111 at an upper position of each of the hanging portions 220a, 220b, 220c, 220d in the upper support plate portion 110.
  • the portion 113 functions as the first detachment prevention means 410 (detachment prevention wall).
  • the groove 122 formed as the attachment facilitating means 300 also functions as the second detachment preventing means.
  • a third detachment preventing means 430 for preventing the cord-like cutting member 40 connected to the connecting portion 210 from easily detaching from the connecting portion 210 is further provided.
  • the third detachment preventing means 430 includes a convex portion 123 protruding outward in the radial direction from the connecting wall portion 120 between the wall portion 211 forming the connecting portion 210 and the first hanging portion 220a.
  • the cord-shaped cutting member 40 having the base end connected to the connecting portion 210 goes around the convex portion 123 and then goes to the back of the first hanging portion 220a.
  • the holding member 100 of the present embodiment is configured to be bilaterally symmetrical with respect to the diameter connecting the two connecting portions 210 located on the opposite side across the center.
  • the cord-shaped cutting member 40 can be hung from the connecting portion 210 along the clockwise route to the hung portions 220a, 220b, 220c, 220d, and conversely, from the connecting portion 210 along the counterclockwise route. It can also be hung around the hung portions 220a, 220b, 220c, and 220d.
  • the cord-shaped cutting member 40 can be appropriately mounted according to the rotation direction of the rotary blade A.
  • the guide member 500 includes a central cylindrical portion 511 and a circular disc portion 520 extending from the lower end of the central cylindrical portion 511.
  • the circular disc portion 520 extends horizontally to the vicinity corresponding to the outer periphery of the holding member 100, The outer peripheral side is displaced upward.
  • the guide member 500 in the present embodiment has an outer diameter larger than the maximum outer diameter of the holding member 100.
  • the vicinity of the central cylinder portion 511 is made of metal, and the remaining portion of the circular disc portion 520 is made of resin.
  • Two bearings 530 stacked in the axial direction are held on the inner surface of the central cylindrical portion 511 of the guide member 500 by press-fitting the outer ring 531.
  • the guide member 500 is a screw that passes through the center hole 101 of the bearing 530 and the boss portion 102 of the holding member 100 in a state where the inner ring 532 of the upper bearing 530 is in contact with the lower surface of the boss portion 102 of the holding member 100.
  • the cord-shaped cutting member 40 is inserted between the convex portion 123 and the first hanging portion 220a from the leading end side, and the leading end is passed through the groove portion 122 to the fourth hanging portion.
  • 220d is further extended outward in the radial direction from the rear side, and the base end portion is turned outside the convex portion 123, and then fitted into the slit 212 from the upper surface of the wall portion 211, and finally the large diameter portion.
  • the groove portion 122 forming the attachment facilitating means 300 includes the straight line L from the back position of the first hooking portion 220a to the back position of the fourth hooking portion 220d.
  • the cord-like cutting member 40 can be easily guided to a required position by simply inserting it without bending, and can be connected to the connecting portion 210 simply by being fitted into the slit 212 of the wall portion 211.
  • the cord-shaped cutting member 40 can be mounted very easily.
  • the protrusions 121 detachment prevention walls
  • the groove portions 122 which can function as the second detachment prevention 420 from the respective wrapping portions 220a, 220b, 220c and 220d.
  • the cord-shaped cutting member 40 is prevented from being detached. Further, the base end portion of the cord-shaped cutting member 40 is fitted from above into the slit 212 in a state where it is forcibly bent by the convex portion 123 forming the third detachment preventing means 430. It does not easily leave 212.
  • the cord-shaped cutting member 40 becomes gradually shorter due to wear.
  • the extension length of the cord-shaped cutting member 40 can be extended as follows. That is, the cord-shaped cutting member 40 that was initially wound around the fourth hooking portion 220d is looped around the third hooking portion 220c as indicated by the phantom line in FIG.
  • a gap S through which the cord-like cutting member 40 can pass in the lateral direction is formed between the upper end of each roller-like member 221 and the upper support plate portion 110, and the outer periphery of the upper support plate portion 110.
  • the extension length of the cord-like cutting member 40 is extended by a length corresponding to the distance between the adjacent roller-like members 221.
  • the cord-like cutting member 40 When the distal end of the cord-like cutting member 40 is further worn and the extension length is shortened, the cord-like cutting member 40 is similarly changed from the second hanging portion 220b to the first hanging portion 220a. Just hang it around.
  • the cord-like cutting member 40 is replaced. By pulling and pulling out, it can be easily removed, and a new cord-like cutting member 40 can be easily attached as described above.
  • the first grip part 233 is gripped with the right hand
  • the second grip part 243 is gripped with the left hand
  • the rotary blade A is operated along the ground to be mowing.
  • the tube 12 is supported.
  • the first grip portion 233 is inclined forward, as can be seen from FIG. 2, the first grip portion 233 is nearly horizontal even when the operation tube 12 is inclined so as to face downward and forward. Therefore, it is convenient for the operator to support the operation tube 12 while applying force in the vertical direction with the right hand.
  • the second grip portion 243 is positioned so as to extend in the lateral direction in front of the first grip portion 233 and higher than the first grip portion 233, as described above, the first grip portion 233 is provided. It is convenient to hold it with the right hand while holding it with the left hand. In particular, even when it is necessary to further lower the distal end of the operation tube 12 on a slope with a downward slope, the operation can be continued with the back muscles extended without bending forward.
  • the second grip portion 243 is positioned to the left with respect to the first grip portion 233, the first grip portion 233 is gripped with the right hand, and the second grip portion 243 is gripped with the left hand. It is also possible to effectively perform the operation of shaking the operation tube 12 to the left and right while holding it.
  • the second handle 240 is configured so as to be able to grip the entire substantially horizontal U-shaped curved portion 242c, so that the substantially horizontal U-shaped curved portion 242c is gripped by the left hand. By doing so, the force for swinging the operation tube 12 to the left and right can be applied more effectively.
  • the operation of swinging the operation tube 12 in the left-right direction and the operation of tilting the operation tube 12 in the vertical direction or maintaining the tilted state can be performed easily. Become.
  • the rotation of the small gasoline engine 10 is performed.
  • the holding member 100 or the cord-like cutting member 40 of the rotary blade A is rotated.
  • the rotational speed of the cord-like cutting member 40 can be adjusted by adjusting the throttle opening of the engine.
  • the rotational output of the engine is decelerated from the transmission shaft 13 by the speed reduction mechanism 16 a in the gear box 16, and is transmitted to the holding member 100 or the cord-shaped cutting member 40 via the rotary blade mounting shaft 14.
  • the rotation speed of the holding member 100 or the cord-shaped cutting member 40 reaches, for example, 5,000 to 6,300 rpm.
  • the peripheral speed of the distal end portion of the cord-shaped cutting member 40 easily reaches 350 km / h.
  • a relatively soft and thin object such as weed is prevented from entering further inward in the radial direction by the guide member 500, and the cord turns at high speed.
  • the cord-shaped cutting member 40 has a diameter of about 3 mm at most and is lightweight.
  • the peripheral speed of the tip is extremely high as described above, it is necessary to cut a soft stalk such as weed. It has enough kinetic energy.
  • the rotary blade A according to the embodiment is a nylon cord type rotary blade having a special configuration, but the configuration of the rotary blade is not limited. Needless to say, the case of using a metal tip, such as a carbide tip blade, instead of the nylon cord type, is also included in the scope of the present invention.
  • the angle of the rotary blade A relative to the operation tube 12 is configured to be appropriately changed by operating the operation lever.
  • the configuration for changing the angle of the rotary blade A is not limited to that of the embodiment.
  • whether or not the angle of the rotary blade A can be changed is a matter of choice.

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  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)

Abstract

[Problem] To provide a portable powered mower configured so that the operation of swinging an operating pipe in a left-right direction, and the operation of vertically tilting the operating pipe and maintaining the tilted state can be easily performed. [Solution] A portable powered mower B is provided with an operating pipe 12, a power source 10 which is connected to the base end side of the operating pipe 12, and a rotating blade A which is supported on the front end side of the operating pipe 12 and which is rotated by the power of the power source 10. The operating pipe 12 is provided with a first handle 230 and a second handle 240. The first handle 230 is provided so as to protrude upward at the base end of the operating pipe 12, and the second handle 240 is provided so as to protrude substantially upward in front of the first handle 230.

Description

携帯式動力草刈り機Portable power mower
　本発明は、携帯式動力草刈り機に関する。 The present invention relates to a portable power mower.
　田畑の土手等に生育する雑草等を除去するための器具として、携帯式動力草刈り機がある。携帯式動力草刈り機の一般的な構成は、例えば特許文献１に示されている。このような携帯式動力草刈り機は、操作管の基端に小型ガソリンエンジン等の動力源が連結され、操作管の先端に回転刃が支持され、小型ガソリンエンジンの回転出力を操作管に通挿された伝動軸を介して回転刃に伝達し、この回転刃を回転させるようになっている。また、操作管には、作業者が両手で把持して操作管を左右に振回操作するためのハンドルが設けられている。ハンドルは、操作管の左右に延出するとともに先端が上方に向け曲げられた略Ｕ字状をしている。 There is a portable power mower as a tool for removing weeds growing on the bank of the field. A general configuration of a portable power mower is disclosed in Patent Document 1, for example. In such a portable power mower, a power source such as a small gasoline engine is connected to the proximal end of the operation tube, a rotary blade is supported at the distal end of the operation tube, and the rotation output of the small gasoline engine is inserted into the operation tube. It is transmitted to the rotary blade via the transmission shaft, and this rotary blade is rotated. The operation tube is provided with a handle for an operator to hold with both hands and swing the operation tube left and right. The handle has a substantially U-shape that extends to the left and right of the operation tube and has its tip bent upward.
　作業者は、回転刃を地面に沿うように位置させ、両手で把持したハンドルを操作して操作管を左右に振回しつつ、草刈り作業を行う。 The worker positions the rotary blade along the ground, operates the handle gripped with both hands, swings the operation tube left and right, and performs mowing work.
　上記構成では、ハンドルが操作管から左右に延出しているため、このハンドルを把持して操作管を左右に振回操作するには都合がよい。しかしながら、前下がり、または前上がりの斜面の草刈りを行うような場合に、操作管の先端を持ち上げたり、下げたりする操作には向いておらず、操作管を前上がりまたは前下がりの姿勢に維持しつつ草刈り作業を継続するには、大きな労力を必要とする。さらには、操作管を前下がりの姿勢に維持するには、身体が前かがみになり、疲れやすい。このように、従来一般的な携帯式動力草刈り機は、必ずしも操作性に優れているとはいえなかった。 In the above configuration, since the handle extends from the operation tube to the left and right, it is convenient to hold the handle and swing the operation tube from side to side. However, it is not suitable for lifting or lowering the tip of the control tube when mowing the front-lowering or front-up slope, and keep the operation tube in the front-up or front-down position. However, continuing the mowing operation requires a great deal of labor. Furthermore, in order to maintain the operation tube in a forward-downward posture, the body becomes leaning forward and tends to get tired. As described above, the conventional portable power mower has not always been excellent in operability.
特開２００３－２５９７１３号公報JP 2003-259713 A
　本発明は、上記した事情のもとで考え出されたものであって、操作管の基端側に動力源が、先端側に回転刃が設けられた携帯式動力草刈り機において、操作管を左右方向に振る操作と、操作管を上下方向に傾斜させたり傾斜状態を維持する操作を楽に行えるようにすることを課題とする。 The present invention has been conceived under the circumstances described above, and in a portable power mower having a power source on the proximal end side of the operation tube and a rotary blade on the distal end side, the operation tube is left and right. It is an object of the present invention to make it easy to perform an operation of swinging in a direction and an operation of tilting the operation tube in the vertical direction or maintaining the tilted state.
　上記課題を解決するため、本発明では、次の技術的手段を採用した。 In order to solve the above problems, the present invention employs the following technical means.
　本発明によって提供される携帯式動力草刈り機は、操作管と、当該操作管の基端側に連結された動力源と、上記操作管の先端側に支持され、上記動力源の動力によって回転させられる回転刃と、を備えた携帯式動力草刈り機であって、上記操作管には、第１のハンドルと、第２のハンドルが設けられており、上記第１のハンドルは、上記操作管の基端部において、上方に向けて突出するように設けられており、上記第２のハンドルは、上記第１のハンドルよりも前方において、概して上方に延びるように設けられていることを特徴とする。 The portable power mower provided by the present invention includes an operation tube, a power source connected to the proximal end side of the operation tube, supported on the distal end side of the operation tube, and rotated by the power of the power source. A portable power mower having a rotary blade, wherein the operation tube is provided with a first handle and a second handle, and the first handle is a base end of the operation tube. And the second handle is provided so as to extend generally upward in front of the first handle.
　好ましい実施の形態では、上記第１のハンドルは、その上部先端側に第１グリップ部が設けられており、当該第１グリップ部は、前方に向け傾斜させられている。 In a preferred embodiment, the first handle is provided with a first grip portion on an upper end side thereof, and the first grip portion is inclined forward.
　好ましい実施の形態では、上記第１グリップ部の傾斜は、上記操作管に対する垂直線に対し、３０～６０°であり、さらに好ましくは、４０～５０°である。 In a preferred embodiment, the inclination of the first grip portion is 30 to 60 °, more preferably 40 to 50 ° with respect to the vertical line to the operation tube.
　好ましい実施の形態では、上記第１グリップ部の先端側には、上記動力源の出力を調節する調節レバーが設けられている。 In a preferred embodiment, an adjustment lever for adjusting the output of the power source is provided on the tip side of the first grip portion.
　好ましい実施の形態では、上記第２のハンドルは、その先端側に第２グリップ部が設けられており、当該第２グリップ部は、上記第１グリップ部よりも上位において、横方向に延びるように形成されている。 In a preferred embodiment, the second handle is provided with a second grip portion on a tip end side thereof, and the second grip portion extends in a lateral direction above the first grip portion. Is formed.
　好ましい実施の形態では、上記第２グリップ部は、上記第１のグリップ部に対し、左方に変位して位置させられている。 In a preferred embodiment, the second grip portion is positioned so as to be displaced to the left with respect to the first grip portion.
　好ましい実施の形態では、上記第２のハンドルは、上記操作管から上方に延びる上方延出部と、当該上方延出部の上端に続いて反時計周りに湾曲する反時計周り湾曲部と、当該反時計周り湾曲部に続いて時計回りに湾曲して略横Ｕ字を形成する略横Ｕ字湾曲部と、を有しており、上記略横Ｕ字湾曲部の上部横方向延出部が上記第２グリップ部を形成している。 In a preferred embodiment, the second handle includes an upward extending portion that extends upward from the operation tube, a counterclockwise bending portion that curves counterclockwise following the upper end of the upward extending portion, A substantially horizontal U-shaped curved portion that curves clockwise and forms a substantially horizontal U-shape following the counterclockwise curved portion, and an upper lateral extension portion of the substantially horizontal U-shaped curved portion is The second grip portion is formed.
　好ましい実施の形態では、上記回転刃は、回転刃取付け軸に取付けられて回転させられる保持部材と、上記保持部材に基端側が保持され、先端側が上記保持部材の半径方向外方に延出させられるようにコード状切断部材を保持する保持機構と、上記保持部材の下位において、当該保持部材に対してその回転軸心を中心として相対回転可能なガイド部材と、を備える。 In a preferred embodiment, the rotary blade includes a holding member that is attached to a rotary blade attachment shaft and is rotated, a proximal end side is held by the holding member, and a distal end side is extended radially outward of the holding member. A holding mechanism that holds the cord-like cutting member, and a guide member that can rotate relative to the holding member about the rotation axis at the lower part of the holding member.
　本発明のその他の特徴および利点は、図面を参照して以下に説明する実施形態の説明から、より明らかとなろう。 Other features and advantages of the present invention will become more apparent from the description of embodiments described below with reference to the drawings.
本発明の携帯式動力草刈り機の一例の略示全体斜視図である。1 is a schematic overall perspective view of an example of a portable power mower according to the present invention. 本発明の携帯式動力草刈り機の一例の一部断面側面図である。It is a partial cross section side view of an example of the portable power mower of the present invention. 図２の要部拡大図である。FIG. 3 is an enlarged view of a main part of FIG. 2. 図３のIV-IV線矢視図である。It is the IV-IV arrow line view of FIG. 図１，２に示される携帯式動力草刈り機に用いられる草刈り機用回転刃の一例を示し、図２のV-V線矢視図に相当する図である。It is a figure which shows an example of the rotary blade for mowers used for the portable power mower shown in FIGS. 1 and 2, and corresponds to the view taken along the line VV in FIG. 図５のVI-VI線断面図である。FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. 図５のVII-VII線断面図である。It is the VII-VII sectional view taken on the line of FIG. 図６のVIII-VIII線断面図である。It is the VIII-VIII sectional view taken on the line of FIG. 図５のIX-IX線断面図である。It is the IX-IX sectional view taken on the line of FIG. 図９のX-X線断面図である。FIG. 10 is a sectional view taken along line XX in FIG. 9. 作用説明図であり、図６のVIII-VIII線断面に相当する。FIG. 8 is an operation explanatory diagram and corresponds to a cross section taken along line VIII-VIII in FIG. 6.
　以下、本発明の好ましい実施の形態につき、図面を参照して具体的に説明する。 Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.
　図１ないし図１０は、本発明の一実施形態に係る携帯式動力草刈り機Ｂ（以下、単に「草刈り機Ｂ」ということがある。）を示している。図１によく表れているように、草刈り機Ｂにおいては、操作管１２の基端側には、駆動源としての小型ガソリンエンジン１０が連結されており、操作管１２の先端側には回転刃Ａが支持されている。動力源の回転出力は、後記する伝動軸１１を介して、操作管１２の先端側に支持された、減速機構１６ａを内蔵するギヤボックス１６から突出する回転刃取付け軸１４に伝達される構成となっている。小型ガソリンエンジン１０としては、作業者の携帯性を考慮して、たとえば排気量が２５ｃｃ程度のものが用いられる。回転刃取付け軸１４の基端側大径部および先端側小径部に、それぞれ雄ネジ１４ａ，１４ｂが形成され、基端側の雄ネジ１４ａには、金属製の回転刃押さえ１７が螺合されている。 1 to 10 show a portable power mower B (hereinafter sometimes simply referred to as “mower B”) according to an embodiment of the present invention. As clearly shown in FIG. 1, in the mower B, a small gasoline engine 10 as a drive source is connected to the proximal end side of the operation tube 12, and a rotary blade A is connected to the distal end side of the operation tube 12. Is supported. The rotation output of the power source is transmitted to a rotary blade mounting shaft 14 that protrudes from a gear box 16 with a built-in speed reduction mechanism 16a supported on the distal end side of the operation tube 12 via a transmission shaft 11 to be described later. It has become. As the small gasoline engine 10, for example, an engine with an engine displacement of about 25 cc is used in consideration of the portability of the operator. Male screws 14a and 14b are formed on the base end side large diameter portion and the distal end side small diameter portion of the rotary blade mounting shaft 14, respectively, and a metal rotary blade holder 17 is screwed onto the base end side male screw 14a. ing.
　本実施形態に係る草刈り機Ｂは、次のようにして、操作レバー１８の回動操作によって回転刃Ａの支持角度を変更できるように構成されている。 The mower B according to the present embodiment is configured so that the support angle of the rotary blade A can be changed by rotating the operation lever 18 as follows.
　図１および図２に示すように、操作管１２は、基端側の第１部分１２ａに対し、先端側の第２部分１２ｂが、操作管１２に套挿したコイルばね１９によって常時先端側に付勢されながら伸縮可能に組み合わされている。操作管１２には、先端が操作管１２の先端から延出する可撓管２０が内挿され、この可撓管２０には、少なくとも先端が可撓性を有する伝動軸１１が通挿されている。伝動軸１１の回転駆動力は、上記ギヤボックス１６から突出する回転刃取付け軸１４に伝達される。第２部分１２ｂには、操作レバー１８が一定の抵抗を付与されつつ回動可能に支持されている。操作レバー１８には、リール部１８ａが形成されており、操作レバー１８を前後に回動することにより、一端を第１部分１２ａに連結したケーブル２１の他端をリール部１８ａに巻き取ったり繰り出したりすることができるようになっている。操作レバー１８をケーブル巻き取り方向に回動することにより、第２部分１２ｂを上記コイルばね１９の弾力に抗して操作管１２の基端方向に引っ込め、操作管１２の全長を短縮することができ、ケーブル繰り出し方向に回動することにより、第２部分１２ｂをコイルばね１９の弾力によって操作管１２の先端方向に伸ばし、操作管１２の全長を伸長させることができる。 As shown in FIGS. 1 and 2, the operation tube 12 has a distal end side second portion 12 b that is always on the distal end side by a coil spring 19 inserted into the operation tube 12 with respect to the proximal end side first portion 12 a. Combined to be stretchable while being energized. A flexible tube 20 having a distal end extending from the distal end of the operation tube 12 is inserted into the operation tube 12, and a transmission shaft 11 having at least a distal end is inserted into the flexible tube 20. Yes. The rotational driving force of the transmission shaft 11 is transmitted to the rotary blade mounting shaft 14 protruding from the gear box 16. The operation lever 18 is rotatably supported by the second portion 12b while being given a certain resistance. The operation lever 18 is formed with a reel portion 18a, and by rotating the operation lever 18 back and forth, the other end of the cable 21 having one end connected to the first portion 12a is wound or fed out to the reel portion 18a. You can do that. By rotating the operation lever 18 in the cable winding direction, the second portion 12b can be retracted in the proximal direction of the operation tube 12 against the elasticity of the coil spring 19, and the total length of the operation tube 12 can be shortened. The second portion 12b can be extended in the direction of the distal end of the operation tube 12 by the elasticity of the coil spring 19 by rotating in the cable feeding direction, and the entire length of the operation tube 12 can be extended.
　上記操作管１２の第２部分１２ａの先端部には、斜め下方に向けて延びるアーム１２ｃが固定連結されており、当該アーム１２ｃの先端には、上記ギヤボックス１６が横方向軸２２を中心として回動可能に支持されている。上記可撓管２０およびこれに内挿された伝動軸１１の全長は一定であるから、上記操作レバー１８の操作により操作管１２の全長が伸長させられると、可撓管２０が操作管１２の内部に引き込まれ、操作管１２の全長が短縮させられると、可撓管２０が操作管の先端から押し出される。これにより上記ギヤボックス１６およびこれに支持された回転刃Ａは上記横方向軸２２を中心として回動し、これにより操作管１２に対する回転刃Ａの角度を所望のように変更することができる。 An arm 12c extending obliquely downward is fixedly connected to the distal end portion of the second portion 12a of the operation tube 12, and the gear box 16 is centered on the lateral axis 22 at the distal end of the arm 12c. It is rotatably supported. Since the total length of the flexible tube 20 and the transmission shaft 11 inserted therein is constant, when the total length of the operation tube 12 is extended by the operation of the operation lever 18, the flexible tube 20 is connected to the operation tube 12. When drawn into the interior and the entire length of the operation tube 12 is shortened, the flexible tube 20 is pushed out from the tip of the operation tube. As a result, the gear box 16 and the rotary blade A supported by the gear box 16 rotate about the lateral axis 22, thereby changing the angle of the rotary blade A with respect to the operation tube 12 as desired.
　上記操作管１２には、作業者は把持して操作管１２を操作するための第１のハンドル２３０および第２のハンドル２４０が設けられている。 The operation tube 12 is provided with a first handle 230 and a second handle 240 for an operator to hold and operate the operation tube 12.
、
　第１のハンドル２３０は、作業者が右手で把持するためのものであり、操作管１２の基端部、すなわち、小型ガソリンエンジン１０との連結部近傍において、上方に向けて突出するように設けられている。より具体的には、この第１のハンドル２３０は、図３に良く表れているように、操作管１２の第１部分１２ａを包持するように取り付けたブラケット２３１を介して設けられている。この第１のハンドル２３０は、パイプ部材２３２の上部先端側に作業者が握持するのに適した長さと太さで直線状に延びる第１グリップ部２３３を有する。また、上記パイプ部材２３２は、上方に向け延びた後前方に傾斜させられており、したがって上記第１グリップ部２３３は、操作管１２の上方において、前方傾斜姿勢で位置する。この第１グリップ部２３３の傾斜角度αは、操作管１２に対する垂直線ｔに対し、３０～６０°、好ましくは４０～５０°とされる。さらに第１のハンドル２３０には、第１グリップ部２３３の上部に隣接して、小型ガソリンエンジン１０の出力を調整して回転刃Ａの回転数を調節するための調節レバー装置（スロットルレバー）２３４が設けられている。このような位置に調節レバー装置２３４を設けることにより、第１グリップ部２３３を握持したまま、調節レバー装置２３４を操作することができる。 ,
The first handle 230 is for the operator to hold with the right hand, and is provided so as to protrude upward in the vicinity of the base end portion of the operation tube 12, that is, in the vicinity of the connection portion with the small gasoline engine 10. It has been. More specifically, the first handle 230 is provided via a bracket 231 attached so as to hold the first portion 12a of the operation tube 12 as clearly shown in FIG. The first handle 230 has a first grip portion 233 extending linearly at a length and thickness suitable for an operator to hold on the upper tip side of the pipe member 232. Further, the pipe member 232 extends upward and is inclined forward, and therefore the first grip portion 233 is positioned in a forward inclined posture above the operation tube 12. The inclination angle α of the first grip portion 233 is 30 to 60 °, preferably 40 to 50 ° with respect to the vertical line t with respect to the operation tube 12. Further, an adjustment lever device (throttle lever) 234 for adjusting the rotation speed of the rotary blade A by adjusting the output of the small gasoline engine 10 adjacent to the upper portion of the first grip portion 233 is provided on the first handle 230. Is provided. By providing the adjustment lever device 234 at such a position, the adjustment lever device 234 can be operated while holding the first grip portion 233.
　第２のハンドル２４０は、作業者が左手で把持するためのものであり、上記第１のハンドル２３０よりも前方において、概して上方に延びるようにして設けられている。より具体的には、この第２のハンドル２４０は、図３および図４に良く表れているように、操作管１２の第２部分１２ｂを包持するように取り付けたブラケット２４１を介して設けられている。このブラケット２４１は、上記コイルばね１９の前端を受け止める部材としても機能する。本実施形態では、この第２のハンドル２４０は、上方に延びる上方延出部２４２ａと、当該上方延出部２４２ａの上端に続いて後方から見て反時計周りに湾曲する反時計周り湾曲部２４２ｂと、当該反時計周り湾曲部２４２ｂに続いて後方から見て時計回りに湾曲して略横Ｕ字を形成する略横Ｕ字湾曲部２４２ｃと、を有するパイプ部材２４２を用いるとともに、このパイプ部材２４２の一部に合成ゴムなどの筒状弾性部材２４３ａを被せて作業者が握持するのに適した太さの第２グリップ部２４３を設けて構成されている。本実施形態では、上記略横Ｕ字湾曲部２４２ｃ全体に筒状弾性部材２４３ａを被せているが、上記略横Ｕ字の上部横方向延出部２４２ｃｃが本発明における第２グリップ部２４３として機能する。この第２グリップ部２４３は、上記第１グリップ部２３３よりも上位に位置するとともに、横方向に延びていることが望ましく、また、第１グリップ部２３３に対し、左方に変位して位置することが望ましい。 The second handle 240 is for an operator to hold with the left hand, and is provided so as to extend generally upward in front of the first handle 230. More specifically, the second handle 240 is provided via a bracket 241 attached so as to hold the second portion 12b of the operation tube 12 as clearly shown in FIGS. ing. The bracket 241 also functions as a member that receives the front end of the coil spring 19. In the present embodiment, the second handle 240 includes an upward extending portion 242a extending upward, and a counterclockwise bending portion 242b that curves counterclockwise when viewed from the rear following the upper end of the upward extending portion 242a. And a pipe member 242 having a substantially horizontal U-shaped curved portion 242c that is curved clockwise when viewed from the rear, and that forms a substantially horizontal U-shape following the counterclockwise curved portion 242b. A part of 242 is covered with a cylindrical elastic member 243a such as synthetic rubber, and a second grip portion 243 having a thickness suitable for an operator to hold is provided. In the present embodiment, the substantially horizontal U-shaped curved portion 242c is entirely covered with the cylindrical elastic member 243a. However, the substantially horizontal U-shaped upper lateral extending portion 242cc functions as the second grip portion 243 in the present invention. To do. The second grip portion 243 is positioned higher than the first grip portion 233 and preferably extends in the lateral direction. The second grip portion 243 is displaced to the left with respect to the first grip portion 233. It is desirable.
　回転刃Ａは、本実施形態では次のように構成されている。 The rotary blade A is configured as follows in this embodiment.
　回転刃Ａは、図５ないし図８によく表れているように、上記回転刃取付け軸１４に取付けられて回転させられ、かつ、コード状切断部材４０を保持する保持部材１００と、この保持部材１００に対してその回転軸心（回転刃取付け軸１４と同一軸心）を中心として相対回転可能なガイド部材５００とを備えている。なお、以下の説明において、半径方向というときは、上記保持部材１００ないし回転刃Ａの半径方向を意味する。 As shown in FIGS. 5 to 8, the rotary blade A is attached to the rotary blade attachment shaft 14 and rotated, and the holding member 100 holding the cord-like cutting member 40, and the holding member. 100, a guide member 500 capable of rotating relative to the rotation axis (same axis as the rotary blade mounting shaft 14). In the following description, the radial direction means the radial direction of the holding member 100 or the rotary blade A.
　保持部材１００は、コード状切断部材４０の基端部を保持する保持機構２００を備える。保持部材１００は、概して平面視円形をしており、中心孔１０１を有するボス部１０２を中心に備えるとともに外周に複数の凹湾曲状の切欠き部１１１が形成された上部支持板部１１０を有し、当該上部支持板部１１０の外周領域においてその下位に、上記保持機構２００が設けられている。保持部材１００は、後記する掛け回し部２２０ａ，２２０ｂ，２２０ｃ，２２０ｄおよびその取り付け部材等、強度保持のために金属で生成するべき部分を除き、樹脂一体成型により構成することができる。 The holding member 100 includes a holding mechanism 200 that holds the proximal end portion of the cord-shaped cutting member 40. The holding member 100 is generally circular in plan view, and has an upper support plate portion 110 that is provided with a boss portion 102 having a center hole 101 at the center and in which a plurality of concave-curved cutout portions 111 are formed on the outer periphery. In addition, the holding mechanism 200 is provided below the outer peripheral region of the upper support plate portion 110. The holding member 100 can be configured by resin integral molding except for portions to be generated with metal for strength maintenance, such as hanging portions 220a, 220b, 220c, and 220d to be described later and attachment members thereof.
　上記上部支持板部１１０の下位には、上記ボス部１０２を取り囲むように位置して上下方向に所定高さを有する連結壁部１２０を介して、上記上部支持板部１１０と略同一外径を有し、上記連結壁部１２０から水平フランジ状に外方へ延出する下部支持板部１３０が一体に設けられている。当該下部支持板部１３０の水平状の上面(支持壁)に、上記保持機構２００が形成されている。 A lower part of the upper support plate part 110 has a substantially same outer diameter as that of the upper support plate part 110 through a connecting wall part 120 that is positioned so as to surround the boss part 102 and has a predetermined height in the vertical direction. And a lower support plate portion 130 that extends outward from the connecting wall portion 120 in a horizontal flange shape. The holding mechanism 200 is formed on the horizontal upper surface (support wall) of the lower support plate portion 130.
　本実施形態では、上記下部支持板部１３０を周方向において２分し、同一構成の２か所の上記保持機構２００が設けられている。上記保持機構２００は、コード状切断部材４０の一端にある大径部４１が連結される連結部２１０と、上記下部支持板部１３０の周方向に並び、コード状切断部材４０が掛け回される複数の掛け回し部２２０ａ，２２０ｂ，２２０ｃ，２２０ｄと、を基本的に有する。コード状切断部材４０としては、例えば、ナイロンコードの一端を熱で潰したり、あるいは結び目をつくったりして大径部を形成した所定長さのもの、あるいは、所定長さに切断したナイロンコード材の一端に円筒状の大径部４１を形成してなる市販のものが用いられる。 In the present embodiment, the lower support plate 130 is divided into two in the circumferential direction, and the two holding mechanisms 200 having the same configuration are provided. The holding mechanism 200 is arranged in the circumferential direction of the connecting portion 210 to which the large-diameter portion 41 at one end of the cord-like cutting member 40 is connected and the lower support plate portion 130, and the cord-like cutting member 40 is wound around. It basically has a plurality of hanging portions 220a, 220b, 220c, and 220d. As the cord-shaped cutting member 40, for example, one end of a nylon cord is crushed by heat or knotted to form a large-diameter portion, or a nylon cord material cut to a predetermined length A commercially available product having a cylindrical large-diameter portion 41 formed at one end thereof is used.
　上記連結部２１０は、図５、図８－１０に良く表れているように、上部支持板部１１０の外周に凹入部１１２を設けることによって上方に臨ませた下部支持板部１３０に上記連結壁部１２０にもつながる壁部２１１を起立させ、この壁部２１１に、その上面に開放するスリット２１２を設けることにより形成されている。当該スリット２１２は、上記コード状切断部材４０が通過でき、上記大径部４１が通過できない幅となっている。 As shown in FIGS. 5 and 8-10, the connecting portion 210 is formed on the lower support plate portion 130 facing upward by providing a recessed portion 112 on the outer periphery of the upper support plate portion 110. The wall portion 211 that is also connected to the portion 120 is erected, and the wall portion 211 is formed by providing a slit 212 that opens on the upper surface thereof. The slit 212 has a width that allows the cord-shaped cutting member 40 to pass therethrough and prevents the large-diameter portion 41 from passing therethrough.
　本実施形態では、各保持機構２００において、掛け回し部２２０ａ，２２０ｂ，２２０ｃ，２２０ｄは、連結部２１０に対して回転刃Ａの周方向に所定間隔を隔てて位置する第１の掛け回し部２２０ａと、この第１の掛け回し部２２０ａに対して上記周方向に所定間隔ずつ隔てて位置する第２、第３および第４の掛け回し部２２０ｂ，２２０ｃ，２２０ｄとからなる４つの掛け回し部から構成されている。各掛け回し部２２０ａ，２２０ｂ，２２０ｃ，２２０ｄは、下部支持板部１３０の上面（支持壁）に対して垂直に立設された支持軸２２２に断面凹曲状の外周溝をもつ鼓型をしたローラ状部材２２１を支持して構成されている。このように、ローラ状部材２２１は、下端を下部支持板部１３０に固定された片持ち状の支持軸２２２に支持されているのであり、上部支持板部１１０の下面と各ローラ状部材２２１の上端との間には、コード状切断部材４０が横方向に通過しうる程度の隙間Ｓが形成されている。また、上部支持板部１１０における各ローラ状部材２２１の上位位置は、平面視において各ローラ状部材２２１が臨むように上記切欠き部１１１が形成されている。 In the present embodiment, in each holding mechanism 200, the wrapping portions 220a, 220b, 220c, and 220d are the first wrapping portions 220a that are located at a predetermined interval in the circumferential direction of the rotary blade A with respect to the connecting portion 210. And four hung portions including second, third, and fourth hung portions 220b, 220c, and 220d that are located at predetermined intervals in the circumferential direction with respect to the first hung portion 220a. It is configured. Each of the hanging portions 220a, 220b, 220c, and 220d has a drum shape having an outer circumferential groove having a concave cross section on a support shaft 222 that is erected vertically to the upper surface (support wall) of the lower support plate portion 130. The roller member 221 is supported. In this way, the roller-like member 221 is supported by the cantilevered support shaft 222 whose lower end is fixed to the lower support plate portion 130, and the lower surface of the upper support plate portion 110 and each roller-like member 221 are supported. A gap S is formed between the upper end so that the cord-like cutting member 40 can pass in the lateral direction. Further, the notch 111 is formed at the upper position of each roller-like member 221 in the upper support plate portion 110 so that each roller-like member 221 faces in plan view.
　上記保持機構２００はまた、コード状切断部材４０の装着を容易化する装着容易化手段３００を有し、この装着容易化手段３００は、複数の掛け回し部２２０ａ，２２０ｂ，２２０ｃ，２２０ｄのうち、上記連結部２１０に最も近い掛け回し部２２０ａ（第１の掛け回し部）の背後位置から上記連結部２１０から最も遠い掛け回し部２２０ｄ（第４の掛け回し部）の背後位置をつなぐ直線Ｌを包含し、上記保持部材１００の半径方向外方に開放する溝部１２２を設けることにより形成されている。本実施形態において、上記連結壁部１２０には、隣り合う掛け回し部２２０ａ，２２０ｂ，２２０ｃ，２２０ｄの間に向けて突出する突起部１２１（この突起部１２１は、上部支持板部１１０における各ローラ状部材２２１の上位位置に切欠き部１１２を設けることにより上部支持板部１１０の外周に形成される突出部１１３の平面的位置と対応している）が設けられているが、これらの突起部１２１ないし連結壁部１２０を半径方向内方に掘り込むようにして、底部１２２ａが上記第１の掛け回し部２２０ａの背後位置から上記第４の掛け回し部２２０ｄの背後位置まで直線状に延びる溝部１２２を形成している。この溝部１２２の底部１２２ａは、かならずしも直線状である必要はなく、上記直線Ｌを包含しておれば、より深く形成した溝部であってもよい。この溝部１２２の上下幅は、上記コード状切断部材４０の径と対応し、この溝部１２２にはまり込んだコード状切断部材４０を上下方向に拘束できる上下幅とすることが好ましい。 The holding mechanism 200 also includes an attachment facilitating means 300 that facilitates the attachment of the cord-like cutting member 40, and the attachment facilitating means 300 includes a plurality of hanging portions 220a, 220b, 220c, and 220d. A straight line L connecting the rear position of the hanging portion 220d (fourth hanging portion) farthest from the connecting portion 210 from the rear position of the hanging portion 220a (first hanging portion) closest to the connecting portion 210. It is formed by providing a groove portion 122 that includes and opens outward in the radial direction of the holding member 100. In the present embodiment, the connecting wall portion 120 includes a protrusion 121 that protrudes between adjacent winding portions 220a, 220b, 220c, and 220d (the protrusion 121 corresponds to each roller in the upper support plate 110). The protrusions 113 formed on the outer periphery of the upper support plate 110 are provided by providing the notches 112 at the upper position of the shaped member 221, and the protrusions are provided. 121 or the connecting wall 120 is dug inward in the radial direction so that the bottom 122a has a groove 122 extending linearly from a position behind the first hook 220a to a position behind the fourth hook 220d. Forming. The bottom 122a of the groove 122 does not necessarily have to be linear, and may be a groove formed deeper as long as the straight line L is included. The vertical width of the groove 122 corresponds to the diameter of the cord-like cutting member 40, and is preferably set to a vertical width that can restrain the cord-like cutting member 40 fitted in the groove 122 in the vertical direction.
　本実施形態ではまた、上記保持機構２００に、上記掛け回し部２２０ａ，２２０ｂ，２２０ｃ，２２０ｄに掛け回されたコード状切断部材４０が上記２２０ａ，２２０ｂ，２２０ｃ，２２０ｄから離脱するのを防止する第１の離脱防止手段４１０および第２の離脱防止手段４２０が設けられている。第１の離脱防止手段４１０は、上部支持板部１１０における各掛け回し部２２０ａ，２２０ｂ，２２０ｃ，２２０ｄの上位位置に切欠き部１１１を設けることにより上部支持板部１１０の外周に形成される突出部１１３が、当該第１の離脱防止手段４１０（離脱防止壁）として機能する。上記したように、突出部１１３の下面とローラ状部材２２１（掛け回し部２２０ａ，２２０ｂ，２２０ｃ，２２０ｄ）の上端との間には、コード状切断部材４０が横方向に通過しうる程度の隙間Ｓが形成される。第２の離脱防止手段４２０については、上記装着容易化手段３００として形成した溝部１２２が当該第２の離脱防止手段としても機能する。 In this embodiment, the holding mechanism 200 also prevents the cord-like cutting member 40 hung around the hung portions 220a, 220b, 220c, 220d from being detached from the 220a, 220b, 220c, 220d. One detachment prevention means 410 and a second detachment prevention means 420 are provided. The first detachment preventing means 410 is a protrusion formed on the outer periphery of the upper support plate portion 110 by providing a notch portion 111 at an upper position of each of the hanging portions 220a, 220b, 220c, 220d in the upper support plate portion 110. The portion 113 functions as the first detachment prevention means 410 (detachment prevention wall). As described above, there is a gap between the lower surface of the protruding portion 113 and the upper end of the roller-like member 221 (the hung portions 220a, 220b, 220c, and 220d) that allows the cord-like cutting member 40 to pass in the lateral direction. S is formed. As for the second detachment preventing means 420, the groove 122 formed as the attachment facilitating means 300 also functions as the second detachment preventing means.
　本実施形態ではさらに、連結部２１０に連結されたコード状切断部材４０がこの連結部２１０から容易に離脱するのを防止する第３の離脱防止手段４３０が設けられている。この第３の離脱防止手段４３０は、連結部２１０を形成する壁部２１１と、上記第１の掛け回し部２２０ａとの間に、連結壁部１２０から半径方向外方に突出する凸部１２３を設け、連結部２１０に基端が連結されたコード状切断部材４０が当該凸部１２３を回ってから第１の掛け回し部２２０ａの背後に向かうようにしている。 In the present embodiment, a third detachment preventing means 430 for preventing the cord-like cutting member 40 connected to the connecting portion 210 from easily detaching from the connecting portion 210 is further provided. The third detachment preventing means 430 includes a convex portion 123 protruding outward in the radial direction from the connecting wall portion 120 between the wall portion 211 forming the connecting portion 210 and the first hanging portion 220a. The cord-shaped cutting member 40 having the base end connected to the connecting portion 210 goes around the convex portion 123 and then goes to the back of the first hanging portion 220a.
　図５、図８から分かるように、本実施形態の保持部材１００は、中心を挟んで反対側に位置する２か所の連結部２１０どうしを結ぶ直径に関し、左右対称に構成されている。これにより、コード状切断部材４０を連結部２１０から時計回り方向の経路で掛け回し部２２０ａ，２２０ｂ，２２０ｃ，２２０ｄに掛け回すこともできるし、逆に、連結部２１０から反時計回りの経路で掛け回し部２２０ａ，２２０ｂ，２２０ｃ，２２０ｄに掛け回すこともできる。このような構成により、回転刃Ａの回転方向に応じて、コード状切断部材４０を適切に装着することができる。 As can be seen from FIGS. 5 and 8, the holding member 100 of the present embodiment is configured to be bilaterally symmetrical with respect to the diameter connecting the two connecting portions 210 located on the opposite side across the center. As a result, the cord-shaped cutting member 40 can be hung from the connecting portion 210 along the clockwise route to the hung portions 220a, 220b, 220c, 220d, and conversely, from the connecting portion 210 along the counterclockwise route. It can also be hung around the hung portions 220a, 220b, 220c, and 220d. With such a configuration, the cord-shaped cutting member 40 can be appropriately mounted according to the rotation direction of the rotary blade A.
　ガイド部材５００は、中心筒部５１１およびこの中心筒部５１１の下端から延出する円形ディスク部５２０を備え、この円形ディスク部５２０は、保持部材１００の外周と対応する付近までは水平に延び、それより外周側は、上方に変位させられている。このように、本実施形態におけるガイド部材５００は、その外径が保持部材１００の最大外径より大となっている。この実施形態においては、中心筒部５１１付近は金属によって形成され、円形ディスク部５２０のその余の部分は樹脂によって形成されている。このガイド部材５００における中心筒部５１１の内面には、軸方向に重ねた２個のベアリング５３０がその外輪５３１を圧入することにより保持されている。このガイド部材５００は、上側のベアリング５３０の内輪５３２を保持部材１００のボス部１０２の下面に当接させた状態で、これらベアリング５３０および保持部材１００のボス部１０２の中心孔１０１を通したネジ軸１５の先端雌ネジ部を回転刃取付け軸１４の先端側雄ネジ１４ｂにねじ込むことにより、当該ネジ軸１５に対し、その軸線（回転刃取付け軸１４の軸線）を中心として相対回転可能に支持される。同時に、保持部材１００が回転刃取付け軸１４に対し、相対回転不能に支持される。 The guide member 500 includes a central cylindrical portion 511 and a circular disc portion 520 extending from the lower end of the central cylindrical portion 511. The circular disc portion 520 extends horizontally to the vicinity corresponding to the outer periphery of the holding member 100, The outer peripheral side is displaced upward. Thus, the guide member 500 in the present embodiment has an outer diameter larger than the maximum outer diameter of the holding member 100. In this embodiment, the vicinity of the central cylinder portion 511 is made of metal, and the remaining portion of the circular disc portion 520 is made of resin. Two bearings 530 stacked in the axial direction are held on the inner surface of the central cylindrical portion 511 of the guide member 500 by press-fitting the outer ring 531. The guide member 500 is a screw that passes through the center hole 101 of the bearing 530 and the boss portion 102 of the holding member 100 in a state where the inner ring 532 of the upper bearing 530 is in contact with the lower surface of the boss portion 102 of the holding member 100. By screwing the tip female screw portion of the shaft 15 into the tip-side male screw 14b of the rotary blade mounting shaft 14, the screw shaft 15 is supported so as to be relatively rotatable around the axis (axis of the rotary blade mounting shaft 14). Is done. At the same time, the holding member 100 is supported so as not to rotate relative to the rotary blade mounting shaft 14.
　コード状切断部材４０は、図１１に示すように、その先端側から上記凸部１２３と第１の掛け回し部２２０ａとの間に差し込み、上記溝部１２２を通って先端が第４の掛け回し部２２０ｄの背後からさらに半径方向外方へ延出するようにし、基端部側を上記凸部１２３の外側を回した上で、上記壁部２１１の上面からスリット２１２に嵌め込み、最後に大径部４１が壁部２１１の側面に係止されるように先端側を引っ張ることにより、保持機構２００に保持される。上記したように、装着容易化手段３００を形成する溝部１２２が第１の掛け回し部２２０ａの背後位置から第４の掛け回し部２２０ｄの背後位置までの直線Ｌを包含しているため、上記のようにコード状切断部材４０を曲げたりすることなく差し込むだけで、容易に必要な位置に導くことができ、また、上記壁部２１１のスリット２１２に嵌め込むだけで連結部２１０に連結することができ、コード状切断部材４０の装着が極めて簡単に行える。装着状態では、第１の離脱防止手段４１０である上記突起部１２１（離脱防止壁）および第２の離脱防止４２０として機能し得る上記溝部１２２により、各掛け回し部２２０ａ，２２０ｂ，２２０ｃ，２２０ｄからのコード状切断部材４０の離脱が防止される。また、コード状切断部材４０の基端部は、第３の離脱防止手段４３０を形成する上記凸部１２３により強制的に屈曲させられた状態で上記スリット２１２に上から嵌め込まれているため、スリット２１２から容易に離脱することはない。 As shown in FIG. 11, the cord-shaped cutting member 40 is inserted between the convex portion 123 and the first hanging portion 220a from the leading end side, and the leading end is passed through the groove portion 122 to the fourth hanging portion. 220d is further extended outward in the radial direction from the rear side, and the base end portion is turned outside the convex portion 123, and then fitted into the slit 212 from the upper surface of the wall portion 211, and finally the large diameter portion. By pulling the distal end side so that 41 is locked to the side surface of the wall portion 211, it is held by the holding mechanism 200. As described above, since the groove portion 122 forming the attachment facilitating means 300 includes the straight line L from the back position of the first hooking portion 220a to the back position of the fourth hooking portion 220d, Thus, the cord-like cutting member 40 can be easily guided to a required position by simply inserting it without bending, and can be connected to the connecting portion 210 simply by being fitted into the slit 212 of the wall portion 211. The cord-shaped cutting member 40 can be mounted very easily. In the mounted state, the protrusions 121 (detachment prevention walls) which are the first detachment prevention means 410 and the groove portions 122 which can function as the second detachment prevention 420 from the respective wrapping portions 220a, 220b, 220c and 220d. The cord-shaped cutting member 40 is prevented from being detached. Further, the base end portion of the cord-shaped cutting member 40 is fitted from above into the slit 212 in a state where it is forcibly bent by the convex portion 123 forming the third detachment preventing means 430. It does not easily leave 212.
　コード状切断部材４０は、磨耗によって次第に短くなる。この場合には、次のようにしてコード状切断部材４０の延出長さを延長することができる。すなわち、当初第４の掛け回し部２２０ｄに掛け回されていたコード状切断部材４０を、図８において仮想線で表すように、第３の掛け回し部２２０ｃに掛け回し直す。本実施形態では、各ローラ状部材２２１の上端と上部支持板部１１０との間にコード状切断部材４０が横方向に通過しうる隙間Ｓが形成されており、かつ上部支持板部１１０の外周部に各ローラ状部材２２１を上方に臨ませる切欠き部１１１が形成されているので、ローラ状部材２２１からコード状切断部材４０を掛け外す作業、および、隣のローラ状部材２２１に掛け回す作業を、容易に行える。このようにして、コード状切断部材４０の延出長さは、隣り合うローラ状部材２２１間の距離に相当する長さ延長される。コード状切断部材４０の先端が再び磨耗して延出長さが短くなった場合には、上記と同様の操作をしてコード状切断部材４０を第３の掛け回し部２２０ｃから第２の掛け回し部２２０ｂに掛け回し直せばよい。コード状切断部材４０の先端がさらに磨耗して延出長さが短くなった場合には、同様にして、コード状切断部材４０を第２の掛け回し部２２０ｂから第１の掛け回し部２２０ａに掛け回し直せばよい。第１の掛け回し部２２０ａに掛け回した状態においてさらに延出長さが短くなった場合には、コード状切断部材４０を交換することになるが、コード状切断部材４０は、大径部４１を引っ張って引き抜くことにより、容易に取り外すことができるし、新たなコード状切断部材４０を上記したように容易に装着することができる。 The cord-shaped cutting member 40 becomes gradually shorter due to wear. In this case, the extension length of the cord-shaped cutting member 40 can be extended as follows. That is, the cord-shaped cutting member 40 that was initially wound around the fourth hooking portion 220d is looped around the third hooking portion 220c as indicated by the phantom line in FIG. In the present embodiment, a gap S through which the cord-like cutting member 40 can pass in the lateral direction is formed between the upper end of each roller-like member 221 and the upper support plate portion 110, and the outer periphery of the upper support plate portion 110. Since the notches 111 are formed so that each roller-like member 221 faces upward, the work of detaching the cord-like cutting member 40 from the roller-like member 221 and the work of hanging around the adjacent roller-like member 221 Can be easily performed. In this way, the extension length of the cord-like cutting member 40 is extended by a length corresponding to the distance between the adjacent roller-like members 221. When the distal end of the cord-like cutting member 40 is worn again and the extension length is shortened, the cord-like cutting member 40 is operated from the third hooking portion 220c to the second hook by performing the same operation as described above. What is necessary is just to hang around the rotation part 220b again. When the distal end of the cord-like cutting member 40 is further worn and the extension length is shortened, the cord-like cutting member 40 is similarly changed from the second hanging portion 220b to the first hanging portion 220a. Just hang it around. When the extension length is further shortened in the state of being hung around the first hanging portion 220a, the cord-like cutting member 40 is replaced. By pulling and pulling out, it can be easily removed, and a new cord-like cutting member 40 can be easily attached as described above.
　草刈り機Ｂを用いて草刈り作業を行う際には、第１グリップ部２３３を右手で握持し、第２グリップ部２４３を左手で握持して回転刃Ａが草刈り対象の地面に沿うように操作管１２を支持する。 When mowing using the mower B, the first grip part 233 is gripped with the right hand, the second grip part 243 is gripped with the left hand, and the rotary blade A is operated along the ground to be mowing. The tube 12 is supported.
　このとき、第１グリップ部２３３は前方傾斜しているので、図２から分かるように、操作管１２が下方前方を向くように傾斜姿勢をとっていても第１グリップ部２３３は水平に近い方向を向くので、作業者が右手で上下方向に力を入れつつ操作管１２を支持するのに都合がよい。 At this time, since the first grip portion 233 is inclined forward, as can be seen from FIG. 2, the first grip portion 233 is nearly horizontal even when the operation tube 12 is inclined so as to face downward and forward. Therefore, it is convenient for the operator to support the operation tube 12 while applying force in the vertical direction with the right hand.
　また、第２グリップ部２４３は、第１グリップ部２３３よりも前方において、第１グリップ部２３３よりも上位において、横方向に延びるように位置しているので、上記のように第１グリップ部２３３を右手で握持しつつ、前方に差し出した左手で握持するのに都合がよい。特に、前下がりの傾斜地において、操作管１２の先端方をさらに下げる必要が生じた場合においても、前かがみになることなく、背筋を伸ばした状態で作業を継続することができる。 Further, since the second grip portion 243 is positioned so as to extend in the lateral direction in front of the first grip portion 233 and higher than the first grip portion 233, as described above, the first grip portion 233 is provided. It is convenient to hold it with the right hand while holding it with the left hand. In particular, even when it is necessary to further lower the distal end of the operation tube 12 on a slope with a downward slope, the operation can be continued with the back muscles extended without bending forward.
　前上がりの傾斜地において、操作管１２の先端方を持ち上げた姿勢をとる必要が生じた場合においても、第１グリップ部２３３を右手で押し下げ、第２グリップ部２４３を左手で手前に引くようにして、効果的に操作管１２に力を加え、その先端の回転刃Ａを持ち上げ、かつその姿勢を維持することができる。 Even when it is necessary to take a posture in which the front end of the operation tube 12 is lifted on a slope that rises forward, the first grip portion 233 is pushed down with the right hand and the second grip portion 243 is pulled forward with the left hand. The force can be effectively applied to the operation tube 12, the rotary blade A at the tip can be lifted, and the posture can be maintained.
　さらに、第２グリップ部２４３は、第１グリップ部２３３に対して左方に変位して位置しているので、第１グリップ部２３３を右手で握持し、第２グリップ部２４３を左手で握持しつつ、操作管１２を左右に振る操作も効果的に行うことができる。この場合、本実施形態では、第２のハンドル２４０は、略横Ｕ字湾曲部２４２ｃ全体を握持することができるように構成しているので、略横Ｕ字湾曲部２４２ｃを左手で握持することにより、より効果的に操作管１２を左右に振るための力を加えることができる。 Further, since the second grip portion 243 is positioned to the left with respect to the first grip portion 233, the first grip portion 233 is gripped with the right hand, and the second grip portion 243 is gripped with the left hand. It is also possible to effectively perform the operation of shaking the operation tube 12 to the left and right while holding it. In this case, in the present embodiment, the second handle 240 is configured so as to be able to grip the entire substantially horizontal U-shaped curved portion 242c, so that the substantially horizontal U-shaped curved portion 242c is gripped by the left hand. By doing so, the force for swinging the operation tube 12 to the left and right can be applied more effectively.
　このように、本実施形態に係る携帯式動力草刈り機Ｂによれば、操作管１２を左右方向に振る操作と、操作管１２を上下方向に傾斜させたり傾斜状態を維持する操作を楽に行えるようになる。 Thus, according to the portable power mower B according to the present embodiment, the operation of swinging the operation tube 12 in the left-right direction and the operation of tilting the operation tube 12 in the vertical direction or maintaining the tilted state can be performed easily. Become.
　草刈り作業においては、調節レバー装置２３４（スロットルレバー）を第１グリップ部２３３を右手で握持したまま操作するなどして小型ガソリンエンジン１０のスロットルの開度を上げると、小型ガソリンエンジン１０の回転出力により、回転刃Ａのうち、保持部材１００ないしコード状切断部材４０が回転させられる。エンジンのスロットルの開度を調節することにより、コード状切断部材４０の回転数を調節することができる。エンジンの回転出力は、伝動軸１３からギヤボックス１６内の減速機構１６ａにより減速され、回転刃取付け軸１４を介して保持部材１００ないしコード状切断部材４０へと伝えられる。保持部材１００ないしコード状切断部材４０の回転数は、たとえば５，０００～６，３００ｒｐｍに達する。回転刃Ａの外径（ガイド部材５００の外径）をたとえば３００ｍｍとすると、コード状切断部材４０の先端部の周速は優に３５０ｋｍ/ｈに達する。この回転刃Ａを地面に沿って移動させてゆくと、雑草等の比較的軟質細状の物体は、ガイド部材５００によってそれ以上の半径方向内方への進入が阻止され、高速で旋回するコード状切断部材４０による横方向からの強烈な衝突を受け、その衝撃によって難なく切断される。コード状切断部材４０は、直径が高々３ｍｍ程度であり、かつ軽量であるが、先端部の周速が上記のようにきわめて高速であるため、軟質である雑草等の茎を切断するのには十分な運動エネルギーを有しているのである。 In mowing, if the throttle opening of the small gasoline engine 10 is increased by operating the adjusting lever device 234 (throttle lever) while holding the first grip portion 233 with the right hand, the rotation of the small gasoline engine 10 is performed. By the output, the holding member 100 or the cord-like cutting member 40 of the rotary blade A is rotated. The rotational speed of the cord-like cutting member 40 can be adjusted by adjusting the throttle opening of the engine. The rotational output of the engine is decelerated from the transmission shaft 13 by the speed reduction mechanism 16 a in the gear box 16, and is transmitted to the holding member 100 or the cord-shaped cutting member 40 via the rotary blade mounting shaft 14. The rotation speed of the holding member 100 or the cord-shaped cutting member 40 reaches, for example, 5,000 to 6,300 rpm. When the outer diameter of the rotary blade A (the outer diameter of the guide member 500) is, for example, 300 mm, the peripheral speed of the distal end portion of the cord-shaped cutting member 40 easily reaches 350 km / h. When the rotary blade A is moved along the ground, a relatively soft and thin object such as weed is prevented from entering further inward in the radial direction by the guide member 500, and the cord turns at high speed. In response to a strong collision from the lateral direction by the cutting member 40, it is cut without difficulty by the impact. The cord-shaped cutting member 40 has a diameter of about 3 mm at most and is lightweight. However, since the peripheral speed of the tip is extremely high as described above, it is necessary to cut a soft stalk such as weed. It has enough kinetic energy.
　もちろん、この発明の範囲は上述した実施形態に限定されることはなく、各請求項に記載した範囲内でのあらゆる変更は、すべて本発明の範囲に包摂される。 Of course, the scope of the present invention is not limited to the above-described embodiments, and all modifications within the scope of the claims are all included in the scope of the present invention.
　実施形態に係る回転刃Ａは、特殊な構成のナイロンコード式の回転刃であるが、回転刃の構成は問われない。ナイロンコード式ではなく金属製の、たとえば超硬チップ刃などを用いる場合にももちろん本発明の範囲に含まれる。 The rotary blade A according to the embodiment is a nylon cord type rotary blade having a special configuration, but the configuration of the rotary blade is not limited. Needless to say, the case of using a metal tip, such as a carbide tip blade, instead of the nylon cord type, is also included in the scope of the present invention.
　実施形態では、操作管１２に対する回転刃Ａの角度を操作レバーの操作により適宜変更できるように構成しているが、回転刃Ａの角度を変更するための構成は実施形態のものに限られないし、また、回転刃Ａの角度を変更可能とするかどうかは、選択事項である。 In the embodiment, the angle of the rotary blade A relative to the operation tube 12 is configured to be appropriately changed by operating the operation lever. However, the configuration for changing the angle of the rotary blade A is not limited to that of the embodiment. In addition, whether or not the angle of the rotary blade A can be changed is a matter of choice.
Ａ　　　　　回転刃
Ｂ　　　　　携帯式動力草刈り機
α　　　　　傾斜角度
ｔ　　　　　垂直線
１０　　　　小型ガソリンエンジン
１１　　　　伝動軸
１２　　　　操作管
１２ａ　　　第１部分（操作管の）
１２ｂ　　　第２部分（操作管の）
１２ｃ　　　アーム
１３　　　　伝動軸
１４　　　　回転刃取付け軸
１６　　　　ギヤボックス
１７　　　　回転刃押さえ
１８　　　　操作レバー
１８ａ　　　リール部
１９　　　　コイルばね
２０　　　　可撓管
２１　　　　ケーブル
２２　　　　横方向軸
４０　　　　コード状切断部材
１００　　　保持部材
２００　　　保持機構
２２０ａ，２２０ｂ，２２０ｃ，２２０ｄ　　掛け回し部
２３０　　　第１のハンドル
２３１　　　ブラケット
２３２　　　パイプ部材
２３３　　　第１グリップ部
２３４　　　調節レバー装置
２４０　　　第２のハンドル
２４１　　　ブラケット
２４２　　　パイプ部材
２４２ａ　　上方延出部
２４２ｂ　　反時計周り湾曲部
２４２ｃ　　略横Ｕ字湾曲部
２４２ｃｃ　横方向延出部
２４３　　　第２グリップ部
２４３ａ　　筒状弾性部材
５００　　　ガイド部材 A Rotary blade B Portable power mower α Inclination angle t Vertical line 10 Small gasoline engine 11 Transmission shaft 12 Operation tube 12a First part (of operation tube)
12b Second part (of the operation tube)
12c Arm 13 Transmission shaft 14 Rotary blade mounting shaft 16 Gear box 17 Rotary blade holder 18 Operation lever 18a Reel portion 19 Coil spring 20 Flexible tube 21 Cable 22 Lateral shaft 40 Cord-like cutting member 100 Holding member 200 Holding mechanism 220a, 220b , 220c, 220d Hanging portion 230 First handle 231 Bracket 232 Pipe member 233 First grip portion 234 Adjusting lever device 240 Second handle 241 Bracket 242 Pipe member 242a Upper extending portion 242b Counterclockwise curved portion 242c U-shaped curved portion 242cc Lateral extending portion 243 Second grip portion 243a Tubular elastic member 500 Guide member

Claims (8)

  1. 　操作管と、当該操作管の基端側に連結された動力源と、上記操作管の先端側に支持され、上記動力源の動力によって回転させられる回転刃と、を備えた携帯式動力草刈り機であって、
    　上記操作管には、第１のハンドルと、第２のハンドルが設けられており、
    　上記第１のハンドルは、上記操作管の基端部において、上方に向けて突出するように設けられており、
    　上記第２のハンドルは、上記第１のハンドルよりも前方において、概して上方に延びるように設けられていることを特徴とする、携帯式動力草刈り機。     A portable power mower comprising an operation tube, a power source connected to the proximal end side of the operation tube, and a rotary blade supported by the distal end side of the operation tube and rotated by the power of the power source. There,
    The operation tube is provided with a first handle and a second handle,
    The first handle is provided so as to protrude upward at a base end portion of the operation tube,
    The portable power mower characterized in that the second handle is provided so as to extend generally upward in front of the first handle.
  2. 　上記第１のハンドルは、その上部先端側に第１グリップ部が設けられており、当該第１グリップ部は、前方に向け傾斜させられている、請求項１に記載の携帯式動力草刈り機。 The portable power mower according to claim 1, wherein the first handle is provided with a first grip portion at an upper end side thereof, and the first grip portion is inclined forward.
  3. 　上記第１グリップ部の傾斜は、上記操作管に対する垂直線に対し、３０～６０°である、請求項２に記載の携帯式動力草刈り機。 The portable power mower according to claim 2, wherein an inclination of the first grip portion is 30 to 60 ° with respect to a vertical line with respect to the operation tube.
  4. 　上記第１グリップ部の先端側には、上記動力源の出力を調節する調節レバーが設けられている、請求項２または３に記載の携帯式動力草刈り機。 The portable power mower according to claim 2 or 3, wherein an adjustment lever for adjusting an output of the power source is provided on a tip side of the first grip portion.
  5. 　上記第２のハンドルは、その先端側に第２グリップ部が設けられており、当該第２グリップ部は、上記第１グリップ部よりも上位において、横方向に延びるように形成されている、請求項２ないし４のいずれかに記載の携帯式動力草刈り機。 The second handle is provided with a second grip portion on a distal end side thereof, and the second grip portion is formed to extend in a lateral direction at a higher position than the first grip portion. Item 5. A portable power mower according to any one of Items 2 to 4.
  6. 　上記第２グリップ部は、上記第１グリップ部に対し、左方に変位して位置させられている、請求項５に記載の携帯式動力草刈り機。 The portable power mower according to claim 5, wherein the second grip portion is displaced to the left with respect to the first grip portion.
  7. 　上記第２のハンドルは、上記操作管から上方に延びる上方延出部と、当該上方延出部の上端に続いて反時計周りに湾曲する反時計周り湾曲部と、当該反時計周り湾曲部に続いて時計回りに湾曲して略横Ｕ字を形成する略横Ｕ字湾曲部と、を有しており、上記略横Ｕ字湾曲部の上部横方向延出部が上記第２グリップ部を形成している、請求項５または６に記載の携帯式動力草刈り機。 The second handle includes an upper extending portion extending upward from the operation tube, a counterclockwise bending portion that curves counterclockwise following the upper end of the upper extending portion, and a counterclockwise bending portion. And a substantially horizontal U-shaped curved portion that curves clockwise to form a substantially horizontal U-shape, and an upper lateral extension of the substantially horizontal U-shaped curved portion serves as the second grip portion. The portable power mower according to claim 5 or 6, wherein the portable power mower is formed.
  8. 　上記回転刃は、
    　回転刃取付け軸に取付けられて回転させられる保持部材と、
    　上記保持部材に基端側が保持され、先端側が上記保持部材の半径方向外方に延出させられるようにコード状切断部材を保持する保持機構と、
    　上記保持部材の下位において、当該保持部材に対してその回転軸心を中心として相対回転可能なガイド部材と、
    を備える、請求項１ないし７のいずれかに記載の携帯式動力草刈り機。     The rotary blade is
    A holding member that is mounted on the rotary blade mounting shaft and rotated;
    A holding mechanism for holding the cord-shaped cutting member so that the proximal end side is held by the holding member and the distal end side is extended radially outward of the holding member;
    In the lower part of the holding member, a guide member that can rotate relative to the holding member about its rotation axis;
    A portable power mower according to claim 1, comprising:
PCT/JP2018/016008 2018-04-18 2018-04-18 Portable powered mower WO2019202684A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/016008 WO2019202684A1 (en) 2018-04-18 2018-04-18 Portable powered mower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/016008 WO2019202684A1 (en) 2018-04-18 2018-04-18 Portable powered mower

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5414936U (en) * 1977-07-05 1979-01-31
JPS56129221U (en) * 1980-02-29 1981-10-01
JPS6363337U (en) * 1986-10-14 1988-04-26
JPH03117415U (en) * 1990-03-16 1991-12-04
US5661960A (en) * 1995-09-07 1997-09-02 Smith; Walker Power tool arm engaging assembly and wheeled platform for a line trimmer
US20090038283A1 (en) * 2007-08-08 2009-02-12 Hurley Edward P Combination blower, edger and trimmer and method for tending vegetation
JP2011072301A (en) * 2009-09-02 2011-04-14 Sakuji Yamada Shouldering powered working machine
JP2011217630A (en) * 2010-04-06 2011-11-04 Sakuji Yamada Portable working machine
US20120180445A1 (en) * 2011-01-14 2012-07-19 Edward Duller Lawn edger
JP2016010397A (en) * 2014-06-04 2016-01-21 山田　策次 Grass mower and rotary blade for grass mower
JP2018007593A (en) * 2016-07-12 2018-01-18 有限会社小林産業 Portable type power mower, and method for application thereof

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5414936U (en) * 1977-07-05 1979-01-31
JPS56129221U (en) * 1980-02-29 1981-10-01
JPS6363337U (en) * 1986-10-14 1988-04-26
JPH03117415U (en) * 1990-03-16 1991-12-04
US5661960A (en) * 1995-09-07 1997-09-02 Smith; Walker Power tool arm engaging assembly and wheeled platform for a line trimmer
US20090038283A1 (en) * 2007-08-08 2009-02-12 Hurley Edward P Combination blower, edger and trimmer and method for tending vegetation
JP2011072301A (en) * 2009-09-02 2011-04-14 Sakuji Yamada Shouldering powered working machine
JP2011217630A (en) * 2010-04-06 2011-11-04 Sakuji Yamada Portable working machine
US20120180445A1 (en) * 2011-01-14 2012-07-19 Edward Duller Lawn edger
JP2016010397A (en) * 2014-06-04 2016-01-21 山田　策次 Grass mower and rotary blade for grass mower
JP2018007593A (en) * 2016-07-12 2018-01-18 有限会社小林産業 Portable type power mower, and method for application thereof

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