WO2021070251A1 - 回転体、刈払機及びボビン - Google Patents
回転体、刈払機及びボビン Download PDFInfo
- Publication number
- WO2021070251A1 WO2021070251A1 PCT/JP2019/039674 JP2019039674W WO2021070251A1 WO 2021070251 A1 WO2021070251 A1 WO 2021070251A1 JP 2019039674 W JP2019039674 W JP 2019039674W WO 2021070251 A1 WO2021070251 A1 WO 2021070251A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bobbin
- peripheral surface
- rotating body
- tubular portion
- outer peripheral
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 claims description 101
- 239000002184 metal Substances 0.000 claims description 24
- 229920003002 synthetic resin Polymers 0.000 claims description 11
- 239000000057 synthetic resin Substances 0.000 claims description 11
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 244000025254 Cannabis sativa Species 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 125000002066 L-histidyl group Chemical group [H]N1C([H])=NC(C([H])([H])[C@](C(=O)[*])([H])N([H])[H])=C1[H] 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/416—Flexible line cutters
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/416—Flexible line cutters
- A01D34/4166—Mounting or replacement of the lines
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
- A01D34/67—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator
Definitions
- This disclosure relates to rotating bodies, brush cutters and bobbins.
- the tip of the linear cutter gradually wears, so when the linear cutter wears, it is necessary to remove the linear cutter from the rotating body and attach a new linear cutter to the rotating body. is there.
- the rotating body includes a support case and a bobbin.
- the support case is connected to a drive shaft of the brush cutter main body and rotates integrally with the drive shaft.
- the bobbin is detachably attached to the support case and rotates integrally with the drive shaft and the support case.
- the support case has a tubular portion through which the drive shaft is inserted, a flange portion extending radially outward from the lower portion of the tubular portion, and a plurality of flange portions penetrating the flange portion. It has a drawer hole.
- the bobbin has an inner peripheral surface that detachably contacts the outer peripheral surface of the tubular portion and an outer peripheral surface that faces the opposite side of the inner peripheral surface and around which a flexible linear cutter is wound.
- the bobbin is mounted on the tubular portion so that the inner peripheral surface is in contact with the outer peripheral surface of the tubular portion, and both ends of the linear cutter wound around the outer peripheral surface are described. It is configured to be pulled out radially outward through two of the plurality of drawer holes.
- the brush cutter according to one aspect of the present disclosure includes the rotating body and the brush cutter main body having the drive shaft to which the rotating body is connected.
- the bobbin according to one aspect of the present disclosure is a bobbin that is detachably attached to a rotating body that rotates integrally with the drive shaft of the mowing machine body, and is attached to the tubular bobbin body and the rotating body.
- the inner peripheral surface of the bobbin body provided so as to be detachably abutted and the bobbin body provided so as to face the opposite side of the inner peripheral surface and around which a flexible linear cutter is wound. It is provided with an outer peripheral surface.
- FIG. 1 is a top view in which a linear cutter is wound around a rotating body of one embodiment.
- FIG. 2 is a top view of the support case included in the rotating body of the same.
- FIG. 3 is a cross-sectional view taken along the line AA of FIG.
- FIG. 4 is a top view in which a linear cutter is wound around a bobbin included in the same rotating body.
- FIG. 5 is a bottom view in which a linear cutter is wound around the bobbin of the same.
- FIG. 6 is a top view of the bobbin of the same.
- FIG. 7 is a cross-sectional view taken along the line BB of FIG.
- FIG. 8 is a view taken along the arrow C of FIG. FIG.
- FIG. 9 is a perspective view of a brush cutter provided with the same rotating body.
- FIG. 10 is a perspective view of a brush cutter provided with the same rotating body and rotating blade.
- FIG. 11 is a top view in which a linear cutter is wound around a modified example of the rotating body of the same.
- FIG. 1 shows the rotating body 1 of one embodiment.
- a linear cutter 8 is wound around the rotating body 1.
- the rotating body 1 is used for mowing grass while being attached to the brush cutter main body 90 (see FIG. 9 and the like).
- the rotating body 1 of one embodiment is a ground body 10 connected to a drive shaft 905 (see FIG. 3) of the brush cutter main body 90.
- the brush cutter 9 is composed of the brush cutter main body 90 and the rotating body 1 (that is, the grounding body 10).
- the brush cutter main body 90 includes a spindle portion 902, a gearbox 903 provided at the tip of the spindle portion 902, and a drive shaft 905 (see FIG. 3) protruding from the gearbox 903.
- a handle 907 is provided in the middle of the spindle portion 902.
- the engine 908, which is a drive source, is mounted on the rear end portion of the spindle portion 902. As a drive source, a battery may be mounted instead of the engine 908.
- the rotating body 1 includes a support case 2 having a circular outer shape in a plan view (see FIGS. 2 and 3 and the like), and a bobbin 3 having an annular outer shape in a plan view (see FIGS. 4 to 8 and the like). ..
- a flexible linear cutter 8 is wound around the bobbin 3.
- the bobbin 3 is detachably attached to the support case 2 opened upward from above the support case 2.
- the bobbin 3 is a cartridge around which the linear cutter 8 is wound.
- the above plan view means that the rotating body 1 is viewed from above.
- Each direction such as up and down used in the present disclosure is based on the case where the central axis C1 (see FIGS. 3 and 9) of the rotating body 1 is set so as to extend in the vertical direction in actual use.
- annular step portion 214 on which the bobbin 3 can be placed and a plurality of vertical grooves 218 capable of guiding the attachment / detachment of the bobbin 3 are formed.
- the tubular portion 21 is divided into an upper tubular portion 213 and a lower tubular portion 215 having a larger outer diameter than the upper tubular portion 213, with the stepped portion 214 as a boundary.
- the outer peripheral surface of the upper tubular portion 213 constitutes the upper portion of the outer peripheral surface 21B of the tubular portion 21, and the outer peripheral surface of the lower tubular portion 215 constitutes the lower portion of the outer peripheral surface 21B of the tubular portion 21.
- the plurality of vertical grooves 218 are four vertical grooves 218 formed at a distance in the circumferential direction on the outer peripheral surface of the upper cylinder portion 213. Each flute 218 has a semi-circular opening cross section.
- the flange portion 23 is formed of a synthetic resin material so as to extend radially outward from a portion extending over the entire circumference of the lower portion 212 of the tubular portion 21.
- the flange portion 23 is integrally formed with the tubular portion 21.
- the flange portion 23 is formed in a bowl shape as a whole so as to be located upward toward the outer portion in the radial direction.
- the lower surface of the flange portion 23 is a ground contact surface 231 that rubs against the ground surface.
- the ground plane 231 is a smoothly curved convex curved surface.
- the surface 232 of the flange portion 23 facing the side opposite to the ground contact surface 231 is a smoothly curved concave curved surface.
- a plurality of recesses 233 are formed on the surface 232 to indicate that it is time to replace the surface. Each recess 233 is non-penetrating, but is configured to penetrate the flange 23 when the flange 23 is worn to some extent.
- An annular step portion 234 is formed in the upper and lower intermediate portions of the surface 232 of the flange portion 23 in a plan view.
- the upper surface of the step portion 234 is located above the upper surface of the step portion 214 of the tubular portion 21.
- a plurality of drawer holes 230 are formed through the upper portion of the flange portion 23 (specifically, the portion above the step portion 214).
- the plurality of drawer holes 230 are four drawer holes 230 formed at a distance in the circumferential direction. Each drawer hole 230 penetrates the flange portion 23 in the radial direction so that the linear cutter 8 can be inserted through the drawer hole 230.
- the metal fitting 28 is a metal fitting configured such that the drive shaft 905 of the brush cutter main body 90 is inserted and connected to the drive shaft 905 by using a tightening means.
- the metal fitting 28 has an insertion hole 285 through which the drive shaft 905 is inserted in the central portion thereof, and has stepped through holes 286 at a plurality of locations surrounding the insertion hole 285.
- the through holes 286 are formed at a plurality of locations on the upper surface of the metal fitting 28 at a distance in the circumferential direction.
- the means for connecting the tubular portion 21 and the metal fitting 28 is not limited to insert molding.
- the tubular portion 21 and the metal fitting 28 may be connected so as to rotate integrally, and may be connected by other means such as press fitting and screw fixing.
- a contact rib 282 higher than the others is formed in the portion between the through holes 286 adjacent in the circumferential direction. These contact ribs 282 stably contact the receiving metal fitting 906 (see FIG. 3) attached to the drive shaft 905.
- the tip of the drive shaft 905 projects downward through the insertion hole 285 of the metal fitting 28 and is housed inside the tubular portion 21.
- the nut 909 is tightened from below the tubular portion 21 to the portion of the drive shaft 905 housed inside the tubular portion 21.
- the support case 2 and the entire rotating body 1 are connected to the drive shaft 905.
- the bobbin 3 is a synthetic resin member configured to rotate integrally with the drive shaft 905 and the support case 2 while being mounted on the support case 2.
- the bobbin 3 is a cylindrical member and has an inner peripheral surface 3A and an outer peripheral surface 3B facing opposite sides.
- the inner peripheral surface 3A is a concave curved surface facing inward in the radial direction
- the outer peripheral surface 3B is a convex curved surface facing outward in the radial direction.
- the bobbin 3 has a cylindrical bobbin body 30, a plurality of protrusions 31 extending radially outward from the upper portion 301 of the bobbin body 30, and extending radially outward from the lower portion 303 of the bobbin body 30. It has a plurality of projecting portions 32.
- the plurality of protrusions 31 will be referred to as upper protrusions 31, and the plurality of protrusions 32 will be referred to as lower protrusions 32.
- the plurality of guide portions 36 are a plurality of ridges 361 configured to guide the attachment of the bobbin 3 to the tubular portion 21.
- the plurality of ridges 361 are four ridges 361 located at a distance in the circumferential direction. Each of the four ridges 361 facing inward in the radial direction constitutes a part of the inner peripheral surface 3A.
- Each of the four ridges 361 is formed in a straight line in the axial direction and is parallel to each other.
- Each ridge 361 is formed in a semicircular cross section so as to be slidably fitted in one vertical groove 218 selected from the four vertical grooves 218 of the tubular portion 21. Has been done.
- the plurality of elastic bodies 33 are four elastic bodies 33 located at a distance in the circumferential direction. In the bobbin 3, the four elastic bodies 33 and the four ridges 361 are alternately positioned in the circumferential direction.
- Each elastic body 33 has a pressing surface 332 that elastically presses against the outer peripheral surface 21B of the tubular portion 21 in a state where the bobbin 3 is attached to the tubular portion 21.
- the pressing surface 332 of each elastic body 33 forms a part of the inner peripheral surface 3A. In other words, a part of the inner peripheral surface 3A is configured to elastically press against the outer peripheral surface 21B of the tubular portion 21.
- the plurality of grooves 34 are four grooves 34 located at a distance in the circumferential direction. Each of the four grooves 34 is located radially outward of the corresponding elastic body 33 among the four elastic bodies 33, allowing the corresponding elastic body 33 to bend radially outward. Each elastic body 33 can be bent outward in the radial direction because the groove 34 is formed on the outer side in the radial direction of the elastic body 33.
- a hook groove 315 is formed at the outer end of each of the four upper protrusions 31 in the radial direction.
- the hook groove 315 has an L-shaped notch from the radial outer end of the upper protrusion 31.
- the hook groove 315 is configured so that one of the ends 81 and 82 on both sides of the linear cutter 8 can be hooked.
- the hook groove 315 may be formed in at least two upper protrusions 31 out of the four upper protrusions 31.
- the elastic body 33 and the groove 34 are located inside each of the four upper protrusions 31 in the radial direction.
- the elastic body 33 and the groove 34 for bending the elastic body 33 are located radially inside the corresponding upper protrusion 31 of the four upper protrusions 31.
- the elastic body 33 and the groove 34 are located inside all the four upper protrusions 31 in the radial direction, but at least one upper protrusion of the four upper protrusions 31 is located. It is sufficient that the elastic body 33 and the groove 34 are located inside the portion 31 in the radial direction.
- the plurality of lower protrusions 32 are four lower protrusions 32 formed at a distance in the circumferential direction.
- the four lower protrusions 32 are all rectangular flat plate-shaped protrusions, but can have other shapes.
- a pair of hook holes 325 are formed in each of the two lower protrusions 32 of the four lower protrusions 32.
- the pair of hook holes 325 are a pair of round holes formed through the inner end of the lower protrusion 32 in the radial direction.
- the pair of hook holes 325 are arranged side by side in the circumferential direction.
- the pair of hook holes 325 are configured so that the linear cutter 8 can be inserted and the central portion 85 thereof can be hooked.
- the pair of hook holes 325 may be formed in at least one of the four lower protrusions 32.
- each of the plurality of elastic bodies 33 that the bobbin 3 has at a distance in the circumferential direction is the outer peripheral surface 21B of the tubular portion 21. It is elastically pushed outward in the radial direction while rubbing against the bobbin. Therefore, when the bobbin 3 is attached to the support case 2, the bobbin 3 is stably held by the support case 2 by the action of the frictional force acting between the plurality of elastic bodies 33 and the tubular portion 21. .. In other words, each elastic body 33 elastically pressed against the outer peripheral surface 21B of the tubular portion 21 generates an urging force for holding the bobbin 3 in the support case 2.
- both ends 81 and 82 of the linear cutter 8 are removed from the hook grooves 315, respectively. After that, both ends 81 and 82 of the linear cutter 8 are pulled out by an appropriate length through the corresponding drawer holes 230, respectively. As a result, both end portions 81 and 82 of the linear cutter 8 wound around the outer peripheral surface 3B of the bobbin 3 in multiple layers are pulled out radially outward through two of the four drawer holes 230.
- the replacement work can be easily performed. Specifically, after removing the nut 909 from the drive shaft 905 and pulling out the drive shaft 905 from the support case 2, the bobbin 3 can be easily removed from the support case 2 by grasping it by hand. At this time, the operator can insert his / her finger into the space between the plurality of upper protrusions 31 and grasp the bobbin main body 30 together with the wound linear cutter 8. Then, another bobbin 3 around which another linear cutter 8 is wound can be easily attached to the support case 2.
- the plurality of guide portions 36 of the bobbin 3 are a plurality of vertical grooves 365 configured to guide the attachment of the bobbin 3 to the tubular portion 21.
- the plurality of vertical grooves 365 are four vertical grooves 365 located at a distance in the circumferential direction, and each of them constitutes a part of the inner peripheral surface 3A.
- Each of the four flutes 365 is formed in a straight line in the axial direction and is parallel to each other.
- a plurality of ridges 219 configured to guide the attachment / detachment of the bobbin 3 are formed on the outer peripheral surface 21B of the tubular portion 21.
- the plurality of ridges 219 are four ridges 219 formed at a distance in the circumferential direction on the outer peripheral surface of the upper cylinder portion 213.
- Each ridge 219 is slidably fitted in one vertical groove 365 selected from the four vertical grooves 365, so that the bobbin 3 can be attached to the tubular portion 21 as a guide. Will be done.
- the material of each of the above configurations is only an example, and the bobbin 3 may be formed of a material other than resin such as paper, or the support case 2 may be formed of a material other than resin such as metal. Good. Further, it is possible not to provide the metal fitting 28 on the support case 2, and it is also possible to use the support case 2 without contacting it with the ground.
- the rotating body (1) of the first aspect has the following configuration.
- the rotating body (1) of the first aspect is connected to the drive shaft (905) of the brush cutter main body (90) and rotates integrally with the drive shaft (905), and the support case (2) and the support case (2). It is provided with a bobbin (3) that is detachably attached to and rotates integrally with a drive shaft (905) and a support case (2).
- the support case (2) has a tubular portion (21) through which a drive shaft (905) is inserted, and a flange portion extending radially outward from the lower portion (212) of the tubular portion (21). It has (23) and a plurality of drawer holes (230) formed through the flange portion (23).
- the rotating body (1) of the first aspect which of the two drawer holes (230) of the plurality of drawer holes (230) is used to pull out the end portions (81, 82) of the linear cutter (8).
- the linear cutter (8) wound around the bobbin (3) can be used for a long period of time, with appropriate selection and modification. Moreover, when replacing the linear cutter (8), the bobbin (3) can be easily removed from the support case (2), and the linear cutter (8) can be easily replaced.
- the bobbin (3) is caused by the elastic holding force exerted by the plurality of elastic bodies (33) regardless of the posture of the support case (2). ) Stable. Therefore, it is possible to prevent the bobbin (3) from suddenly falling out of the support case (2). Moreover, the work of removing the bobbin (3) from the support case (2) can be easily performed.
- the rotating body (1) of the third aspect has the following configuration in addition to the configuration provided by the rotating body (1) of the second aspect.
- the bobbin (3) further has a groove (34) that allows the elastic body (33) to flex outward in the radial direction.
- the rotating body (1) of the fourth aspect includes the following configurations in addition to the configurations provided by the rotating body (1) of the second aspect.
- the bobbin (3) has a plurality of elastic bodies (33) at a distance in the circumferential direction.
- the rotating body (1) of the fifth aspect has the following configuration in addition to the configuration provided by the rotating body (1) of the fourth aspect.
- the bobbin (3) further has a plurality of grooves (34) that allow each of the plurality of elastic bodies (33) to flex radially outward.
- each of the plurality of elastic bodies (33) may bend outward in the radial direction in a state of being in contact with the outer peripheral surface (21B) of the tubular portion (21). Therefore, an appropriate elastic force can be applied to the tubular portion (21) by the plurality of elastic bodies (33).
- the work of attaching the bobbin (3) to the tubular portion (21) can be easily performed, and the bobbin (3) is attached to the tubular portion (21).
- the bobbin (3) is positioned in the circumferential direction with respect to the tubular portion (21) by hooking the plurality of guide portions (36) on the outer peripheral surface (21B) of the tubular portion (21).
- the rotating body (1) of the eighth aspect has the following configuration in addition to the configuration provided by the rotating body (1) of any one of the first to seventh aspects.
- the bobbin (3) is a tubular bobbin body (30) on which an inner peripheral surface (3A) and an outer peripheral surface (3B) are formed, and a bobbin body (30).
- a plurality of upper protrusions (31) extending radially outward from the upper portion (301) and a plurality of lower protrusions extending radially outward from the lower portion (303) of the bobbin body (30). (32) and further.
- the linear cutter (8) wound around the outer peripheral surface (3A) of the bobbin body (30) may unexpectedly come off from the bobbin body (30). , It is effectively suppressed by the plurality of upper protrusions (31) and the plurality of lower protrusions (32).
- a finger can be inserted into the space between the plurality of upper protrusions (31) to grasp the bobbin body (30) together with the wound linear cutter (8).
- a finger can be inserted into the space between the plurality of lower protrusions (32) to grasp the bobbin body (30) together with the wound linear cutter (8).
- the rotating body (1) of the ninth aspect has the following configuration in addition to the configuration provided by the rotating body (1) of the eighth aspect.
- the rotating body (1) of the ninth aspect when viewed along the central axis (C1) of the bobbin (3), the plurality of upper protrusions (31) and the plurality of lower protrusions (32) are , Alternately located in the circumferential direction.
- the central portion (85) of one linear cutter (8) is hooked on the hook hole (325), and the remaining portion of the linear cutter (8) is bobbined.
- the linear cutter (8) can be easily wrapped around the bobbin main body (30).
- the rotating body (1) of the twelfth aspect has the following configuration in addition to the configuration provided by the rotating body (1) of any one of the first to eleventh aspects.
- the support case (2) has a tubular portion (21) made of synthetic resin, a flange portion (23) made of synthetic resin, and an upper portion of the tubular portion (21). It has a metal fitting (28) connected to (211).
- the metal fitting (28) has an insertion hole (285) through which the drive shaft (905) is inserted.
- the tubular portion (21) and the flange portion (23) made of synthetic resin are integrally connected to the drive shaft (905) via the metal fitting (28). Can be linked.
- the linear cutter (8) wound around the outer peripheral surface (3A) of the bobbin body (30) may unexpectedly come off from the bobbin body (30). , It is suppressed by a plurality of protrusions (31).
- the elastic body (33) can be flexed radially outward in a state of being in contact with the outer peripheral surface (21B) of the tubular portion (21), the elastic body (33) causes the tubular portion (21). ) Can be given an appropriate elastic force.
- the elastic body (33) and the groove (34) are located on the radial inner side of the corresponding protrusion (31), whereby the bobbin (3) is formed. The whole can be formed compactly.
- the brush cutter (9) of the first aspect is a brush cutter main body having a rotating body (1) of any one of the first to thirteenth aspects and a drive shaft (905) to which the rotating body (1) is connected. (90) and.
- the linear cutter (8) wound around the tubular portion (21) of the support case (2) included in the rotating body (1) is used for a long period of time. Can be used. Moreover, when replacing the linear cutter (8), the bobbin (3) can be easily removed from the support case (2) with the rotating body (1) removed from the drive shaft (905). The cutter (8) can be easily replaced.
- the bobbin (3) of the first aspect is a bobbin (3) that is detachably attached to a support case (2) that rotates integrally with the drive shaft (905) of the brush cutter main body (90).
- a tubular bobbin body (30), an inner peripheral surface (3A) of the bobbin body (30), and an outer peripheral surface (3B) of the bobbin body (30) are provided.
- the inner peripheral surface (3A) is provided so as to be detachably abutted against the support case (2).
- the outer peripheral surface (3B) faces the side opposite to the inner peripheral surface (3A), and is provided so that a flexible linear cutter (8) can be wound around the outer peripheral surface (3B).
- the linear cutter (8) wound around the bobbin (3) can be used for a long period of time, and when the linear cutter (8) is replaced, the linear cutter (8) can be used.
- the linear cutter (8) By easily removing the bobbin (3) from the support case (2), the linear cutter (8) can be easily replaced.
- the bobbin (3) of the second aspect has the following configuration in addition to the configuration of the bobbin (3) of the first aspect.
- the bobbin body (30) is attached to the support case (2) and is elastically pressed against the support case (2). Further.
- the bobbin (3) of the second aspect is stably held with respect to the support case (2) by the elastic holding force exerted by the plurality of elastic bodies (33). Therefore, it is possible to prevent the bobbin (3) from suddenly falling out of the support case (2). Moreover, the work of removing the bobbin (3) from the support case (2) can be easily performed.
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Abstract
Description
本開示を、添付図面に示す実施形態に基づいて説明する。
以上、本開示を添付図面に示す実施形態に基づいて説明したが、本開示は上記した実施形態に限定されない。
以上、実施形態に基づいて説明したように、第1の態様の回転体(1)は、以下の構成を具備する。第1の態様の回転体(1)は、刈払機本体(90)の駆動軸(905)に連結され、駆動軸(905)と一体に回転する支持ケース(2)と、支持ケース(2)に着脱自在に装着され、駆動軸(905)及び支持ケース(2)と一体に回転するボビン(3)と、を備える。支持ケース(2)は、その内部に駆動軸(905)が挿し通される筒状部(21)と、筒状部(21)の下部(212)から径方向外側に延出されたフランジ部(23)と、フランジ部(23)に貫通形成された複数の引出し孔(230)と、を有する。ボビン(3)は、筒状部(21)の外周面(21B)に対して着脱自在に当接する内周面(3A)と、内周面(3A)とは反対側を向き、可撓性の線状カッター(8)が巻き付けられる外周面(3B)と、を有する。ボビン(3)は、内周面(3A)が筒状部(21)の外周面(21B)と当接するように筒状部(21)に装着された状態で、外周面(3B)に巻き付けられた線状カッター(8)の両端部(81,82)が、複数の引出し孔(230)のうち二つの引出し孔(230)を通じて、径方向外側に引き出されるように構成されている。
Claims (16)
- 刈払機本体の駆動軸に連結され、前記駆動軸と一体に回転する支持ケースと、
前記支持ケースに着脱自在に装着され、前記駆動軸及び前記支持ケースと一体に回転するボビンと、を備え、
前記支持ケースは、その内部に前記駆動軸が挿し通される筒状部と、前記筒状部の下部から径方向外側に延出されたフランジ部と、前記フランジ部に貫通形成された複数の引出し孔と、を有し、
前記ボビンは、前記筒状部の外周面に対して着脱自在に当接する内周面と、前記内周面とは反対側を向き、可撓性の線状カッターが巻き付けられる外周面と、を有し、
前記ボビンは、前記内周面が前記筒状部の前記外周面と当接するように前記筒状部に装着された状態で、前記外周面に巻き付けられた前記線状カッターの両端部が、前記複数の引出し孔のうち二つの引出し孔を通じて、径方向外側に引き出されるように構成されている
回転体。 - 前記ボビンは、前記筒状部に装着された状態で、前記筒状部の前記外周面に対して弾性的に押し当る弾性体を、更に有する
請求項1の回転体。 - 前記ボビンは、前記弾性体が径方向外側に撓むことを許容する溝を、更に有する
請求項2の回転体。 - 前記ボビンは、前記弾性体を周方向に距離をあけて複数有する
請求項2の回転体。 - 前記ボビンは、前記複数の弾性体のそれぞれが径方向外側に撓むことを許容する複数の溝を、更に有する
請求項4の回転体。 - 前記ボビンの前記内周面には、前記ボビンの前記筒状部への装着をガイドする凸状又は凹状の複数のガイド部分が設けられている
請求項1から5のいずれか一項の回転体。 - 前記ボビンの前記内周面には、前記ボビンの前記筒状部への装着をガイドする凸状又は凹状の複数のガイド部分が設けられている
前記複数の弾性体と前記複数のガイド部分は、周方向において交互に位置する
請求項4又は5の回転体。 - 前記ボビンは、前記内周面及び前記外周面が形成された筒状のボビン本体と、前記ボビン本体の上部分から径方向外側に延出された複数の上側突部と、前記ボビン本体の下部分から径方向外側に延出された複数の下側突部と、を更に有する
請求項1から7のいずれか一項の回転体。 - 前記ボビンの中心軸に沿って見たとき、前記複数の上側突部と、前記複数の下側突部は、周方向において交互に位置する
請求項8の回転体。 - 前記ボビンは、前記内周面及び前記外周面が形成された筒状のボビン本体と、前記ボビン本体の上部分から径方向外側に延出された複数の上側突部と、を更に有し、
前記複数の上側突部のうち少なくとも二つの上側突部には、前記線状カッターの端部を引っ掛けるための引掛溝が形成されている
請求項1から7のいずれか一項の回転体。 - 前記ボビンは、前記内周面及び前記外周面が形成された筒状のボビン本体と、前記ボビン本体の下部分から径方向外側に延出された複数の下側突部と、を更に有し、
前記複数の下側突部のうち少なくとも一つの下側突部に、前記線状カッターを挿し通してその中央部分を引っ掛けるための引掛孔が形成されている
請求項1から7のいずれか一項の回転体。 - 前記支持ケースは、合成樹脂製の前記筒状部と、合成樹脂製の前記フランジ部と、前記筒状部の上部に連結される金具と、を有し、
前記金具は、前記駆動軸が挿し通される挿通孔を有する
請求項1から11のいずれか一項の回転体。 - 前記ボビンは、前記内周面及び前記外周面が形成された筒状のボビン本体と、前記ボビン本体から径方向外側に延出された複数の突部と、前記ボビン本体が前記筒状部に装着された状態で、前記筒状部の前記外周面に対して弾性的に押し当る弾性体と、前記弾性体が径方向外側に撓むことを許容する溝と、を更に有し、
前記弾性体及び前記溝は、前記複数の突部のうち対応する突部の径方向内側に位置する
請求項1の回転体。 - 請求項1から13のいずれか一項の回転体と、
前記回転体が連結される前記駆動軸を有する前記刈払機本体と、を備える
刈払機。 - 刈払機本体の駆動軸と一体に回転する支持ケースに対して、着脱自在に装着されるボビンであって、
筒状のボビン本体と、
前記支持ケースに対して着脱自在に当接するように設けられた前記ボビン本体の内周面と、
前記内周面とは反対側を向き、可撓性の線状カッターが巻き付けられるように設けられた前記ボビン本体の外周面と、を備える
ボビン。 - 前記ボビン本体は、前記支持ケースに装着された状態で、前記支持ケースに対して弾性的に押し当る複数の弾性体を、更に有する
請求項15のボビン。
Priority Applications (8)
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US17/767,051 US20220361400A1 (en) | 2019-10-08 | 2019-10-08 | Rotator, brush cutter, and bobbin |
PCT/JP2019/039674 WO2021070251A1 (ja) | 2019-10-08 | 2019-10-08 | 回転体、刈払機及びボビン |
KR1020227015378A KR20220100587A (ko) | 2019-10-08 | 2019-10-08 | 회전체, 예초기 및 보빈 |
EP19948649.9A EP4042856A4 (en) | 2019-10-08 | 2019-10-08 | ROTARY BODY, BRUSH CUTTER AND SPOOL |
AU2019469864A AU2019469864B2 (en) | 2019-10-08 | 2019-10-08 | Rotating body, brush cutter, and bobbin |
CA3157363A CA3157363A1 (en) | 2019-10-08 | 2019-10-08 | Rotator, brush cutter, and bobbin |
JP2020517608A JP6758701B1 (ja) | 2019-10-08 | 2019-10-08 | 回転体、刈払機及びボビン |
TW109134678A TW202126165A (zh) | 2019-10-08 | 2020-10-07 | 旋轉體、割草機及筒管 |
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USD1015094S1 (en) * | 2022-02-11 | 2024-02-20 | Aero-Flex Technologies, Inc. | Trimmer conversion component |
USD1002307S1 (en) * | 2022-02-11 | 2023-10-24 | Aero-Flex Technologies, Inc. | Trimmer conversion component |
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JPS6079923U (ja) * | 1983-11-10 | 1985-06-03 | 株式会社共立 | 草刈り用ナイロンコ−ド |
JPH0252530U (ja) * | 1988-10-12 | 1990-04-16 | ||
JPH05168328A (ja) * | 1991-12-17 | 1993-07-02 | Sutaatengu Kogyo Kk | ロータリカッタ |
JP2002291315A (ja) * | 2001-04-02 | 2002-10-08 | Diatop Kk | 刈払機に用いる刈払いヘッド |
JP2014236688A (ja) * | 2013-06-07 | 2014-12-18 | 有限会社小林産業 | 草刈り機用回転刃およびこれを用いた草刈り機 |
WO2015037030A1 (ja) | 2013-09-10 | 2015-03-19 | 株式会社北村製作所 | 回転体、刈払機及び草刈り方法 |
JP2016538857A (ja) * | 2013-11-22 | 2016-12-15 | アリス、ジョージ、イー | ライン貫通供給型の草木トリマー装置 |
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US7412768B2 (en) * | 2004-05-11 | 2008-08-19 | Alliss George E | Invertible trimmer line spool for a vegetation trimmer apparatus |
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Patent Citations (7)
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JPS6079923U (ja) * | 1983-11-10 | 1985-06-03 | 株式会社共立 | 草刈り用ナイロンコ−ド |
JPH0252530U (ja) * | 1988-10-12 | 1990-04-16 | ||
JPH05168328A (ja) * | 1991-12-17 | 1993-07-02 | Sutaatengu Kogyo Kk | ロータリカッタ |
JP2002291315A (ja) * | 2001-04-02 | 2002-10-08 | Diatop Kk | 刈払機に用いる刈払いヘッド |
JP2014236688A (ja) * | 2013-06-07 | 2014-12-18 | 有限会社小林産業 | 草刈り機用回転刃およびこれを用いた草刈り機 |
WO2015037030A1 (ja) | 2013-09-10 | 2015-03-19 | 株式会社北村製作所 | 回転体、刈払機及び草刈り方法 |
JP2016538857A (ja) * | 2013-11-22 | 2016-12-15 | アリス、ジョージ、イー | ライン貫通供給型の草木トリマー装置 |
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JPWO2021070251A1 (ja) | 2021-10-21 |
AU2019469864A1 (en) | 2022-04-21 |
KR20220100587A (ko) | 2022-07-15 |
TW202126165A (zh) | 2021-07-16 |
CA3157363A1 (en) | 2021-04-15 |
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AU2019469864B2 (en) | 2023-11-16 |
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