JP2007289040A - Bush cutter attachment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bush cutter attachment of simple and compact structure, capable of exerting additional functions including blowing function and snow-clearing function. <P>SOLUTION: For example, in a blowing attachment, it has the following construction and mechanism: A blower fan 20 rotates synchronously, via a gear head 10, with the drive shaft of a bush cutter. Casings 30 and 40 are of scroll casing shape with attaching the blower fan 20 inside and covering the outer side of the fan 20. A supporting body 50, with the basal end of the gear head 10 exposed, is provided with a small opening 54a allowing the gear head 10 and the control lever 1 of the bush cutter to be joined each other. The supporting body 50 functions to relatively position the gear head 10 circumferentially through fastening the gear head 10 or the control lever 1 of the bush cutter on the circumferential rim of the small opening 54a and hinder the relative rotation for the gear head 10 and the casings 30 and 40. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a brush cutter attachment that can be attached to a brush cutter, and in particular, a handy type that is embodied as a cleaning attachment that removes the weeds cut by the brush cutter by air blowing or a snow removal attachment that mechanically removes snow on the road. It relates to a brush cutter attachment.

Conventionally, when weeds and the like on the side of a road are weeded by a brush cutter, the weeds and the like that have been weeded are scattered and collected on the opposite side of the road by a separate blower. However, in general, such a blower is expensive. Further, when the brush cutter and the blower are prepared separately, it takes time to store and carry them. Therefore, it is convenient if the blowing operation can be performed using only the rotary drive mechanism of the cutting blade of the brush cutter. Further, when removing snow on the side of a road or the like, a snow removal work vehicle is usually used, but it is convenient if there is a device that can be easily used for small-scale snow removal work or the like. Here, as a technique for using the brush cutter for another purpose, there is a technique disclosed in Patent Document 1.
JP 2003-180117 A

  Patent Document 1 discloses a portable work machine that removes a rotary blade (cutting blade) of a brush cutter and mounts a work machine having a speed reduction unit instead to perform field cultivation and snow removal. This portable work machine includes a drive engine at the rear end portion of the operation handle rod, and a first drive shaft that uses the drive engine as a drive source at the distal end portion of the operation handle rod. An operation handle and a shoulder belt are attached at appropriate positions in the middle of the operation tube. The portable work machine has a second drive shaft connected to the first drive shaft of the brush cutter in the vertical direction via the drive connection means on the upper part of the work machine main body provided with the different axis reduction means. Is arranged. Furthermore, a work shaft that is decelerated from the second drive shaft is disposed in the left-right or front-rear direction of the work machine body. Furthermore, a rotation working means is mounted on the work shaft. This portable work machine can perform simple field cultivation and snow removal using the rotary working means.

  However, although the portable work machine described in Patent Document 1 can be used for work such as snow removal by replacing the rotary blade of the brush cutter, the structure of the work machine itself is complicated, and the work machine is attached to the brush cutter. The structure is also complicated. Specifically, in the technique described in Patent Document 1, the speed reduction transmission means is provided inside the work machine main body, and the operation handle of the brush cutter is provided by a mounting arm and a clamping member extending from the left and right of the work machine main body. The work machine body is attached to the brush cutter so as to sandwich the midway part of the cocoon. Therefore, the cost of the whole apparatus rises, and there is a possibility that considerable labor is required for attachment to and removal from the brush cutter.

  Therefore, the present invention has a simple and compact structure and can exhibit additional functions such as a blower function and a snow removal function, reduces manufacturing costs, requires no effort for storage and carrying, and a brush cutter. It is an object of the present invention to provide a brush cutter attachment capable of improving workability by allowing easy and quick replacement work for attachment to and removal from an object.

  The brush cutter attachment according to claim 1 includes a rotating body and a housing. The rotating body is fixed to the output shaft of the gearhead of the brush cutter and rotates in synchronization with the rotation of the output shaft. The housing is formed of a hollow hollow body that attaches the rotating body inside and covers the outside of the rotating body, and exposes the base end of the gear head on the upper surface side of the hollow body, and the gear head and the brush cutter At least a small opening that allows connection with the drive shaft is formed. The housing also locks the gear head or the drive shaft portion of the brush cutter by the peripheral edge of the small opening, relatively positions the gear head in the circumferential direction, and prevents relative rotation with the gear head. .

  A brush cutter attachment according to a second aspect includes a gear head, a rotating body, and a housing. The gear head has an output shaft that is detachably connected to the drive shaft of the brush cutter and is rotated synchronously by the drive shaft of the brush cutter. The rotating body is fixed to the output shaft of the gear head and rotates in synchronization with the rotation of the output shaft. The housing is formed of a hollow hollow body that attaches the rotating body inside and covers the outside of the rotating body, and exposes the base end of the gear head on the upper surface side of the hollow body, and the gear head and the brush cutter At least a small opening that allows connection with the drive shaft is formed. The housing also locks the gear head or the drive shaft portion of the brush cutter by the peripheral edge of the small opening, relatively positions the gear head in the circumferential direction, and prevents relative rotation with the gear head. .

  A brush cutter attachment according to a third aspect is the structure of the first or second aspect, wherein the casing includes a casing and a support. The casing is formed of a hollow hollow body that is supported by the gear head on the extension line of the rotating shaft of the rotating body and covers the outside of the rotating body. The casing forms a large opening on the upper surface side of the hollow body, and the hollow body. A discharge port is formed on the side of the body. The support is detachably attached to the large opening of the casing to expose the base end of the gear head and to have a small opening that allows connection between the base end of the gear head and the drive shaft of the brush cutter. A plurality are formed in the circumferential direction. The brush cutter attachment selects any one of the plurality of small openings of the support so that the base end of the gear head can be exposed from the small openings, and the gear shaft or the drive shaft of the brush cutter is formed by the peripheral edge of the small openings. The gear head is positioned relative to the casing to prevent relative rotation between the gear head and the casing. Further, the brush cutter attachment selects a plurality of small openings in the support and exposes the gear head from the small openings, thereby determining the circumferential angular position of the outlet of the casing with respect to the drive shaft of the brush cutter. Change is adjustable.

  A brush cutter attachment according to a fourth aspect of the present invention is the air blower fan according to any one of the first to third aspects, wherein the rotating body is a centrifugal fan. Further, the casing is formed of a scroll casing-like hollow body that covers the whole of the blower fan, the large opening is formed as an intake port on an upper surface that is one side surface in the thickness direction of the hollow body, and the hollow body A discharge port as a blower port is formed on the side surface of the above, and a portion other than the large opening and the discharge port is sealed to make the inside a conditioned space.

  A brush cutter attachment according to a fifth aspect is the air blower fan according to the third aspect, wherein the rotating body is a centrifugal fan. Further, the casing is formed of a scroll casing-like hollow body that covers the whole of the blower fan, and the large opening is formed as an intake port on an upper surface that is one side surface in the thickness direction of the hollow body. A discharge port as a blower port is formed on the side surface, and the portion other than the large opening and the discharge port is sealed to make the inside a conditioned space. Furthermore, the support body has a latching portion that can be fitted and fitted to a peripheral edge portion of the large opening of the casing on the outer periphery, and has a shape and size larger than the outer periphery of the base end portion of the gearhead. A plurality of small openings that expose the base end portion to the outside in an inclined state are arranged at a constant angle in the circumferential direction, and a pressing screw is screwed to the center portion. The brush cutter attachment adjusts the amount of protrusion of the pressing screw into the casing by screwing the pressing screw into the center portion of the support member to protrude into the casing and increasing or decreasing the amount of screwing of the pressing screw. As a result, the tip end of the shaft portion of the pressing screw is brought into contact with and pressed against the upper surface of the gear head, and the blower fan is rotatably sandwiched between the gear head and the bottom surface of the casing.

  A brush cutter attachment according to a sixth aspect of the present invention is the brush cutter attachment according to any one of the first to third aspects, wherein the rotating body is in the form of a centrifugal fan having a plurality of blades facing downward, It is a snow removal rotating body that can remove snow freely by rotation. In addition, the casing is installed on the lower side of the snow removal rotator by attaching the snow removal rotator to cover the upper surface side and outer peripheral surface side of the snow removal rotator and opening the entire lower surface side. It consists of a hollow-shaped hollow body that has a plurality of blades exposed as snow removal openings exposed downward.

  The brush cutter attachment according to the present invention has a simple and compact structure and can exhibit additional functions such as an air blowing function and a snow removal function, reducing the manufacturing cost, and does not require labor for storage and carrying. The workability can be improved by making it possible to easily and quickly replace and replace the brush cutter.

  Hereinafter, the best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described. Throughout each embodiment, the same members, elements, or parts are denoted by the same reference numerals, and the description thereof is omitted.

Embodiment 1
FIG. 1 is a perspective view showing the entirety of a blower attachment as a brush cutter attachment according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view showing an upper case and a support of the casing of the blower attachment according to Embodiment 1 of the present invention. FIG. 3 is an exploded perspective view showing the lower case, the rotating body, and the gear head of the casing of the blower attachment according to Embodiment 1 of the present invention. FIG. 4 is a plan view showing the blower attachment according to Embodiment 1 of the present invention. FIG. 5 is a cross-sectional view showing the blower attachment according to Embodiment 1 of the present invention. FIG. 6 is a plan view showing the inside of the casing by removing the upper case of the blower attachment according to Embodiment 1 of the present invention. The brush cutter attachment according to the first embodiment is such that the rotary blade (cutting blade) of the shoulder-type brush cutter is removed and attached to the tip of the pipe-shaped operation rod 1 of the brush cutter instead of the rotary blade. . In addition, as a brush cutter used in the present invention, a shoulder-type brush cutter is mainly assumed. Such a brush cutter is generally provided inside a long cylindrical (circular tubular) operation rod 1 with a drive shaft. 2 is extended in the axial direction, the drive shaft 2 is rotated by a rotational drive source (motor) provided on the base end side of the operation rod 1, and the transmission shaft in the gear head fixed to the distal end side of the operation rod 1 is used. The rotating blade fixed to the output shaft is rotated by rotating the output shaft. The brush cutter attachment according to the first embodiment is replaceable with the gear head and the rotary blade of the brush cutter. Specifically, as shown in FIGS. 1 to 3, the brush cutter attachment according to the first embodiment is embodied as a blower attachment, and includes a gear head 10, a blower fan 20 as a rotating body, and a casing constituting the casing. 30 and 40 and a support body 50 which also forms a housing.

  More specifically, the gear head 10 has the same configuration as the gear head of the brush cutter, and as shown in FIGS. 4 and 5, a cylindrical upper case that is detachably fixed to the tip of the operating rod 1 of the brush cutter. Part 11. A conduction shaft 12 extends along the axial center inside the upper case portion 11, and a driving bevel gear 13 is fixed to the tip (lower end) of the conduction shaft 12. On the other hand, a fastening ring 14 is fitted on the outer periphery of the distal end portion of the upper case portion 11, and the fastening ring 14 is tightened or loosened so that the distal end portion of the operating rod 1 of the brush cutter is placed above the gear head 10. It is designed to be attached to and detached from the case part 11. Further, a bell-shaped lower case portion 15 is integrally formed at the tip of the upper case portion 11 of the gear head 10 at a predetermined inclination angle. An output shaft 16 extends along the shaft center inside the lower case portion 15, and a driven bevel gear 17 is fixed to the base end (upper end) of the output shaft 16. The driving bevel gear 13 and the driven bevel gear 17 mesh with each other. Thereby, the rotation of the drive shaft 2 of the brush cutter is transmitted to the drive bevel gear 13 via the transmission shaft 12, and the rotation of the drive bevel gear 13 is transmitted to the output shaft 16 via the driven bevel gear 17, The output shaft 16 rotates synchronously with the drive shaft 2. An oil inlet 18 is integrally formed on the outer peripheral surface of the lower case 15. Furthermore, a ring-shaped bearing 19 having a substantially same outer diameter as that of the lower end of the lower case 15 is fitted and attached to the lower end of the lower case 15 of the gear head 10 so as to be coaxial. The front end portion (lower end portion) of the output shaft 16 passes through the center portion in the bearing 19 and protrudes a predetermined amount below the bearing 19. As described above, the gear head 10 is detachably connected to the drive shaft 2 of the brush cutter, and the transmission shaft 12 is rotationally driven by the drive shaft 2 via the drive bevel gear 13. The driven bevel gear 15 is driven by the transmission shaft 12. And an output shaft 16 that is driven and rotated at a predetermined angle with respect to the conduction shaft 12, and the output shaft 16 is synchronously rotated by the drive shaft 2 of the brush cutter.

  As shown in FIG. 3, the blower fan 20 has a plurality of (10 in the illustrated example) blades 22 at equal intervals (36 degrees in the circumferential direction) on one side surface (upper surface) in the thickness direction of the disk-shaped base 21. The fan is a centrifugal fan arranged at intervals. A circular recess-shaped fitting recess 23 is formed at the center of one side surface in the thickness direction of the blower fan 20, and a small-diameter circular insertion hole 24 is formed through the center of the fitting recess 23. Yes. Then, the lower end of the bearing 19 is fitted and mounted in the fitting recess 23 of the blower fan 20, and the protruding portion of the output shaft 16 of the gear head 10 is inserted into the insertion hole 24 of the blower fan 20. 20 is projected to the other side surface in the thickness direction, and in this state, a nut 25 is screwed onto the tip of the output shaft 16 of the gear head 10, whereby the blower fan 20 is attached to the gear head 10 via the bearing 19. The blower fan 20 is rotated in synchronization with the rotation of the output shaft 16. On the other hand, at the center of the other side surface (lower surface) in the thickness direction of the blower fan 20, a ring-shaped support projection 26 having a diameter corresponding to the fitting recess 23 protrudes slightly downward and is integrally formed. In addition, a circular fitting recess 26 a is formed on the inner peripheral surface of the support protrusion 26. Thus, the blower fan 20 is coaxially fixed to the output shaft 16 of the gear head 10 and rotates around the rotation shaft in synchronization with the rotation of the output shaft 16.

  The casing has a scroll casing shape constituted by the upper casing 30 and the lower casing 40. As shown in FIG. 2, the upper casing 30 corresponds to an upper portion obtained by dividing the scroll casing into two vertically, and a large opening 31 a that forms a large-diameter circle is formed at the center of the disk-shaped upper wall 31. . Further, the peripheral wall 32 is integrally formed so as to hang down continuously to the entire length of the outer peripheral edge of the upper wall 31. A boss portion 33 is integrally formed at a predetermined interval on the outer peripheral surface of the lower end of the peripheral wall 32, and an insertion hole 33a for screw insertion is formed through the boss portion 33 in the thickness direction. Further, a short cylindrical inner upright 34 is vertically formed integrally with the periphery of the large opening 31 a of the upper wall 31, and at a predetermined distance outside the inner upright 34 in the radial direction of the upper wall 31. A short cylindrical outer rising portion 35 is vertically formed integrally. Further, the upper surface portion (ring-shaped portion 31b) of the upper wall 31 between the inner upright portion 34 and the outer upright portion 35 is integrally formed with a latching protrusion portion 36 that forms a plurality of blocks at predetermined intervals in the circumferential direction. Is formed. Each latching protrusion 36 is formed with a slit-like latching groove 36a so as to extend in the circumferential direction (clockwise direction) of the large opening 31a of the upper wall 31 to the middle (a predetermined angle). A semi-cylindrical upper discharge cylinder portion 37 forming a discharge port is integrally formed on the side surface of the upper casing 30.

  As shown in FIG. 3, the lower casing 40 corresponds to a lower portion obtained by dividing the scroll casing into two vertically, and a step having a substantially circular shape with a predetermined outer diameter at the center of the stepped disk-like bottom wall 41. The protrusion 42 is integrally formed. At the center of the step protrusion 42, a ring protrusion-like support protrusion 43 having a diameter corresponding to the fitting recess 23 of the blower fan 20 is protruded slightly upward and integrally formed. A circular fitting recess 43a is formed on the inner peripheral surface. Further, the peripheral wall 44 is integrally formed so as to suspend from the entire length of the outer peripheral edge of the bottom wall 41. A boss portion 45 is integrally formed on the outer peripheral surface of the upper end of the peripheral wall 44 at a position (same angle position) aligned with the boss portion 33 of the upper casing 30, and a screw hole 45 a is formed in the boss portion 45 in the thickness direction. Has been. A semi-cylindrical lower discharge cylinder portion 47 that forms a discharge port is integrally formed on the side surface of the lower casing 40. Here, as shown in FIG. 6, between the outer peripheral surface of the stepped protrusion 42 of the bottom wall 41 and the inner peripheral surface of the peripheral wall 44, a circumferential air blowing groove communicating with the lower discharge cylinder portion 47. 48 is formed. The air blowing groove 48 has a spiral shape that gradually expands counterclockwise toward the lower discharge cylinder portion 47. As shown in FIG. 5, the lower half portion of the bearing 49 having the same outer diameter is tightly fitted and held in the fitting recess 43 a of the support protrusion 43 of the step protrusion 42. Then, the support protrusion 26 of the blower fan 20 with the gear head 10 attached to the blade 22 side is tightly fitted to the upper half of the bearing 49 accommodated and held in the support protrusion 43 of the lower casing 40 to be held and held. The blower fan 20 can be positioned and held in the lower casing 40 with the blades 22 facing upward. In this state, the blower fan 20 can smoothly rotate between the upper bearing 19 and the lower bearing 49.

  The upper casing 30 and the lower casing 40 are joined to each other, the boss portions 33 and the boss portions 45 are aligned with each other, the shaft portion of the screw S is inserted into the insertion hole 33a of the boss portion 33, and the screw hole of the boss portion 45 is inserted. The casing of the first embodiment is configured by screwing into 45a. The casings 30 and 40 are formed of a scroll casing-shaped hollow body that houses the blower fan 20 therein and covers the entire blower fan 20 (upper surface side, bottom surface side, outer peripheral surface side), and the thickness direction of the hollow body. The large opening 31a is formed as an intake port on the upper surface which is one side surface. In addition, the casings 30 and 40 form a cylindrical discharge cylinder part by joining the upper discharge cylinder part 37 and the lower discharge cylinder part 47, and a circular shape or an elliptical shape at the tip of the discharge cylinder parts 37 and 47. The opening forms a discharge port OP as a blower port protruding from the side surface of the hollow body. And the casings 30 and 40 seal parts other than the large opening 31a and the discharge outlet OP, and form the conditioned space for rectifying the ventilation from the said ventilation fan 20 in the inside.

  As shown in FIGS. 1 and 5, the support 50 has a ring portion 51 that forms a ring plate shape corresponding to the ring-shaped portion 31 b between the inner upright portion 34 and the outer upright portion 35 of the upper casing 30. ing. A large circular opening 51 a is formed by the inner periphery of the ring portion 51, and faces the large opening 31 a of the upper casing 30 with substantially the same diameter. Further, the peripheral wall 52 is integrally formed so as to hang down continuously to the entire length of the outer peripheral edge of the ring portion 51. The outer diameter (outer peripheral surface diameter) of the peripheral wall 52 having a short cylindrical shape is the same as the inner diameter (inner peripheral surface diameter) of the outer raised portion 35, and the width of the peripheral wall 52 is the same as that of the outer raised portion 35. The width from the upper end to the upper end of the latching protrusion 36 is the same. As a result, the outer peripheral surface of the peripheral wall 52 of the support member 50 is brought into close contact with the inner peripheral surface of the outer raised portion 35, and the support member 50 is moved upward while the lower end of the peripheral wall 52 is in contact with the upper end of the latching protrusion 36. Opposite to the ring-shaped portion 31b of the casing 30, the outer upright portion 35 is detachably tightly fitted and held. Further, a latching piece 53 as a latching portion is integrally formed on the lower surface of the ring portion 51 of the support body 50, and is slidably inserted into the latching groove 36a of the latching projection 36 of the upper casing portion 30 so as to be detachable. It is designed to be fitted and locked. The same number of the latching pieces 53 of the support 50 as the latching protrusions 36 of the upper casing part 30 are arranged and formed at the same angular interval as the arrangement angular interval of the latching protrusions 36. It is adapted to align with the latching protrusion 36. In the large opening 51 a inside the ring part 51, a plurality of strip-like partition parts 54 are formed so as to extend radially from the center toward the inner peripheral edge of the ring part 51. Six partition portions 54 are formed in the circumferential direction of the ring portion 51 at regular angular intervals (60 degree intervals), and the large openings 51a of the ring portion 51 are partitioned into six fan-shaped small openings 54a. . A small-diameter screw hole 54 b is formed at the center of the six partition portions 54, and a small-diameter cylindrical boss portion 55 is integrally fixed to the lower surface of the center portion of the partition portion 54. The boss portion 55 is formed with a screw hole 55a having the same diameter and the same screw pitch that communicates with the screw hole 54b of the partition portion 54 and extends coaxially. A shaft portion of a holding bolt 56 is screwed into the screw hole 54b of the partition portion 54 and the screw hole 55a of the boss portion 55, and by adjusting the screwing amount, the lower end of the boss portion 55 is lowered downward. The amount of protrusion is adjustable. In addition, the screw hole 54b of the partition part 54 may be a simple insertion hole, and the shaft part of the holding bolt 56 may be inserted into the insertion hole of the partition part 54 so as to be screwed only into the screw hole 55a of the boss part 55. .

  Then, the peripheral wall 52 of the support 50 is attached to the ring-shaped portion 31b of the upper casing 30 and rotated clockwise, so that the hooking piece 53 of the support 50 is hooked by the hooking protrusion 36 of the upper casing 30. It slides into the retaining groove 36 a and is latched by the latching protrusion 36. Thereby, the support body 50 is attached to the upper casing 30 so as not to be detached in the vertical direction. Further, from this mounted state, by rotating the support body 50 in the reverse direction (counterclockwise direction), the latching piece 53 is detached from the latching groove 36a of the latching projection 36 and the latched state is released. The support 50 can be removed from the upper casing 30. In addition, the latching groove 36a of the latching protrusion 36 of the upper casing 30 is formed to allow the latching piece 53 of the support body 50 to enter in the clockwise direction as shown in the illustrated example. On the contrary, you may form so that the approaching of the counterclockwise direction of the latching piece 53 may be accept | permitted. In this case, the peripheral wall 52 of the support 50 is attached to the ring-shaped portion 31 b of the upper casing 30 and rotated counterclockwise, so that the latching piece 53 of the support 50 is latched by the latching protrusion 36 of the upper casing 30. The sliding groove 36 a is slid into the latching groove 36 a and is latched by the latching protrusion 36. Thus, the support body 50 has the latching piece 53 on the outer periphery as a latching part that can be latched by being fitted to the latching protrusion 36 disposed at the peripheral edge of the large opening 31a of the casings 30 and 40. It has a substantially circular outer shape. Further, the support 50 has a small opening 54a that exposes the upper case portion 11 of the gear head 10 to the outside in an inclined state with a shape and size larger than the outer periphery of the upper case portion 11 of the gear head 10. And a plurality of press bolts 56 as press screws are screwed into the central portion.

  To use the blower attachment according to the first embodiment, first, the lower half of the bearing 49 is fitted into the fitting recess 43a of the lower casing 40 in an exploded state of the upper casing 30 and the lower casing. With the blade 22 of the blower fan 20 facing upward, the support protrusion 26 on the lower surface side of the blower fan 20 is fitted in the upper half of the bearing 49 that holds the center of the step protrusion 42 of the lower casing. Hold together. Then, the upper casing 30 is assembled to the lower casing 40, the boss portions 33 and the boss portions 45 are aligned with each other, the shaft portion of the screw S is inserted into the insertion hole 33a of the boss portion 33, and the screw of the boss portion 45 is inserted. The scroll casing is configured by screwing into the hole 45a and joining the upper casing 30 and the lower casing 40 together. In this state, the blower fan 20 is disposed at a predetermined position inside the casings 30 and 40, and the casing 30 and 40 cover the bottom surface side and the outer peripheral surface side of the blower fan 20 to form a conditioned space. Most of the upper surface side of the fan 20 is opened by a large opening 31a of the upper casing 30, and an intake port is formed by the large opening 31a. In this state, the gear head 10 attached to the upper surface side of the blower fan 20 is entirely exposed from the large opening 31a of the upper casing 30, and the base end portion (upper end portion) of the upper case portion 11 is the large opening 31a. It is located near the periphery. Next, from this state, the support body 50 is fitted to the ring-shaped portion 31 b of the upper casing 30 and rotated clockwise, so that the latching piece 53 of the support body 50 is engaged with the latching protrusion 36 of the upper casing 30. Hang on. Thereby, the support body 50 is fixedly held so as not to be detached from the casings 30 and 40 in the vertical direction. At this time, the base end portion of the upper case portion 11 of the gear head 10 is exposed and protruded from a desired small opening 54a among the plurality (six) of small openings 54a of the support body 50. Then, a holding bolt 56 is screwed into the support 50 and the upper surface of the lower case portion 15 of the gear head 10 is pressed downward by the tip (lower end). Then, the blower fan 20 is pressed toward the bearing 49 of the lower case 40 via the gear head 10, and the blower fan 20 is sandwiched between the support 50 and the lower casing 40 (bottom surface of the casing). Supported by In this state, when the tip end portion of the operation rod 1 of the brush cutter is attached to the upper case portion 11 of the gear head 10 and fixed by the fastening ring 14, the drive shaft 2 of the brush cutter is drivingly connected to the transmission shaft 12 of the gear head 11. Is done.

  In this way, the blower attachment attached to the tip of the brush cutter operating rod 1 instead of the rotary blade (mowing blade) allows the user (operator) to operate the brush cutter operating rod 1 (and the handle of the operating rod 1). By gripping and operating, weeding and scattering work by blowing air from the blower fan 20 can be performed. At this time, in the blower attachment attached to the tip of the operating rod 1, the casings 30 and 40 are suspended and supported by the gear head 10 at the tip of the operating rod 1 via the holding bolt 56. However, at this time, since the downward protrusion amount of the holding bolt 56 from the support body 50 can be adjusted, the blowing fan 20 attached to the lower end of the gear head 10 can be attached to the holding bolt by appropriately setting the adjustment amount. It can be securely clamped between the lower end of 56 and the bearing 49 on the lower case 40. That is, the pressing bolt 56 is screwed into the center portion of the support 50 and protrudes into the casings 30 and 40, and the screwing amount of the pressing bolt 56 is increased or decreased to adjust the protruding amount into the casings 30 and 40. As a result, the tip end of the shaft portion of the pressing bolt 56 is pressed against the upper surface of the gear head 10, and the bearing 19 at the lower end of the gear head 10 (the upper end of the blower fan 20) and the bearing 49 at the bottom surface of the casings 30, 40. In between, the blower fan 20 is pinched in a close state and freely rotatable. Therefore, the blower fan 20 does not rattle when the blower fan 20 rotates, and the blower fan 20 can be smoothly rotated. That is, from this state, when the driving shaft 2 is rotated by driving the prime mover of the brush cutter, the transmission shaft 12 in the upper case portion 11 of the gear head 10 rotates synchronously to rotate the driving bevel gear 13, thereby driving the driving bevel gear 13. Rotates the driven bevel gear 17 in the lower case portion 15 to rotate the output shaft 16 synchronously. As a result, the blower fan 20 connected to the output shaft 16 rotates synchronously, and from the large openings 51a (more precisely, the six small openings 54b) of the support body 50 on the upper surface side of the casings 30 and 40, the large size of the upper casing 30 is obtained. Air outside the casings 30 and 40 is sucked into the interior via the opening 31a, and an air flow of a predetermined pressure is generated in the casings 30 and 40. Then, the casings 30 and 40 rectify the air flow along the air blowing groove 48, and discharge and blow air from the discharge ports OP of the discharge cylinder portions 37 and 47.

  As described above, the blower attachment of the first embodiment forms a casing by the casings 30 and 40 and the support body 50, and when used, the lower case portion 15 of the gear head 10 on the extension line of the rotation shaft of the blower fan 20 is used. The housing is suspended and supported by the upper surface. Further, the casing is formed of a hollow body (scroll casing shape) that covers the outside of the blower fan 20 by attaching the blower fan 20 therein, and the upper case portion 11 of the gear head 10 is formed on the upper surface side of the hollow body. A small size that allows the base end to be exposed and protruded, and allows connection between the base end of the upper case portion 11 of the gear head 10 and the operation rod 1 of the brush cutter and connection of the transmission shaft 12 of the gear head 10 and the drive shaft 2 of the brush cutter. At least the opening 54b is formed. And the housing | casing latches the outer peripheral surface of the upper case part 11 of the gear head 10, or the outer peripheral surface of the drive shaft part (operating rod 1 which includes the drive shaft 2) of the gearhead 10 by the peripheral part of the said small opening 54b. The gear head 10 is positioned relative to the casings 30 and 40 to prevent relative rotation between the gear head 10 and the casings 30 and 40. Thus, when the rotary fan 20 is rotated, it is possible to reliably prevent the casings 30 and 40 from rotating with respect to the gear head 10 and the operating rod 1 of the brush cutter due to the reaction caused by the rotational force. In the first embodiment, since the support body 50 constituting the housing forms a plurality of such small openings 54b in the circumferential direction, any one of the plurality of small openings 54b of the support body 50 is selected. The base end of the upper case portion 11 of the gear head 10 can be exposed through the small opening 54b. Therefore, any one of the plurality of small openings 54b of the support 50 is selected, and the base end of the upper case portion 11 of the gear head 10 is exposed and protruded from the small openings 54b. 11, the outer peripheral surface of the upper case portion 11 of the gear head 10 or the outer peripheral surface of the operating rod 1 of the brush cutter is locked by the peripheral edge portion of the small opening 54 b of the selected support 50. Can be positioned relative to the casings 30 and 40, and relative rotation between the gear head 10 and the casings 30 and 40 can be prevented. At this time, the plurality of small openings 54b of the support 50 are selected, and the base end of the upper case portion 11 of the gear head 10 is exposed and protrudes from the small openings 54b, whereby the casings 30 and 40 for the operation rod 1 of the brush cutter. The angular position of the discharge port OP in the circumferential direction can be changed and adjusted. For example, as shown by the solid line in FIG. 1, the upper case portion 11 of the gear head 10 is inserted into the small opening 54b of the support body 50 farthest from the discharge cylinder portions 37, 47 of the casings 30, 40. By mounting the body 50 on the ring-shaped part 31a of the casings 30 and 40, the operation rod 1 of the brush cutter is positioned farthest from the discharge cylinder parts 37 and 47 of the casings 30 and 40, and the air blowing operation is performed by the air blowing attachment. be able to. Further, as indicated by a virtual line (one-dotted line) in FIG. 1, a gear head is formed in the small opening 54b of the support body 50 at a position closer to the discharge cylinders 37 and 47 of the casings 30 and 40 than in the case of the solid line position in FIG. In the state where the upper case portion 11 is inserted, the support 50 is attached to the ring-shaped portion 31a of the casings 30 and 40, so that the discharge cylinder portions of the casings 30 and 40 with respect to the operating rod 1 of the brush cutter can be obtained. With the angle positions 37 and 47 changed, the air blowing work by the air blowing attachment can be performed. Thereby, the angular position of the discharge port OP of the blower attachment with respect to the operation rod 1 can be arbitrarily changed in a plurality of stages in accordance with the situation such as an obstacle at the work place, and the blowing work (weeding by blowing air) under the optimum conditions. The removal work of weeds etc. later can be performed.

  Here, in the brush cutter attachment according to the first embodiment, as described above, the operation head 1 of the gear head 10 or the brush cutter is locked and positioned by the periphery of the small opening 54a of the support 50, and they do not rotate relative to each other. I am doing so. However, in the present embodiment, as shown in FIG. 1, after the gear head 10 is protruded from the small opening 54 a at a desired position of the support 50 and the operating rod 1 is attached to the gear head 10, the operating rod 1 is attached to the casing 30. , 40 is preferably provided with a detachable fixing means to the operating rod 1 so as to be fixed securely. Specifically, on the upper surface of the ring portion 51 of the support 50, at least a portion facing the small opening 54 a at the insertion / attachment position of the operating rod 1 (positions at both ends of the arc of the fan-shaped small opening 54 a) The holding portion 57 is fixed at a predetermined interval in the circumferential direction. In addition, one end of a belt-like elastic body made of a rubber belt or the like is fixed to one of the pair of holding portions 57, and the other end of the belt-like elastic body is detachably attached to the other by a hook latch or the like. As a result, when the operating rod 1 is protruded from the desired small opening 54a of the support body 50, the belt-like elastic body is stretched from one holding portion 57 to the other holding portion 57 and attached. The operation rod 1 can be fixed by elastically holding the outer peripheral surface of the belt 1 with a belt-like elastic body, and rattling of the operation rod 1 and the gear head due to vibration during rotation of the rotary fan 20 can be prevented. . The fixing means is not limited to the illustrated example, and any configuration may be adopted as long as the operating rod 1 can be detachably fixed to the casings 30 and 40, the support body 50, and the like. it can. For example, the base ends of the pair of left and right bracket-like members are fixed to a predetermined position (for example, the same position as the holding portion 57) of the support, and the other end is detachable from the operation rod 1 and is operated via the bracket-like member. The heel 1 may be fixed. Alternatively, the base ends of the pair of bracket-like members are fixed to the ring portion 51 at a position opposite to the small opening 54a of the support body 50 from which the operation rod 1 protrudes (diametrically spaced), and the other end is operated at the other end. By supporting the operation rod 1 from a separated position so that it can be attached to and detached from the body 1, more stable support is possible. In the first embodiment, the support body 50 is fitted to the ring-shaped portion 51 b of the upper casing 30 and rotated in a predetermined direction (the direction in which the latching groove 36 a of the latching protrusion 36 is formed), and the latching piece 53 is rotated. Is inserted into the latching groove 36a of the latching projection 36 of the upper casing 30 and brought into contact with the rear end thereof, thereby preventing further rotation of the support 50 and preventing upward separation. Positioning and fixing. Therefore, the direction in which the latching groove 36a of the latching protrusion 36 is formed is preferably opposite to the direction of rotation of the blower fan 20, and in this way, the reaction force (from the operation rod 1) with the rotation of the blower fan 20 is set. The direction of the force transmitted to the support 50 is the same as the direction in which the latching groove 36 a of the latching projection 36 is formed, and the rotation of the blower fan 20 causes the latching piece 53 to be pulled into the latching groove of the latching projection 36. Since it works in the direction in which it latches in 36a, the malfunction that the latching of the support body 50 loosens by rotation of the ventilation fan 20 can be prevented reliably. On the other hand, in the first embodiment, the operation of the brush cutter is performed by selecting any small opening 54b of the support 50 and exposing and projecting the gear head 10 (the base end of the upper case portion 11) from the small opening 54b. The circumferential angular position of the outlet of the casings 30 and 40 relative to the rod 1 can be changed and adjusted. However, by selecting the latching portion 36 (angular position of the latching portion 36) of the casing 30 that latches the latching piece 53 formed on the lower surface of the support 50, the discharge of the casings 30 and 40 to the operating rod 1 is performed. The circumferential angle position of the outlet OP can be changed and adjusted. Therefore, only one small opening 34 a that exposes and projects the gear head 10 is formed at a predetermined angular position of the support 50, and the latching portion 36 of the casing 40 that latches the latching piece 53 formed on the lower surface of the support 50. By selecting, it is possible to change and adjust the circumferential angular position of the outlet of the casings 30 and 40 with respect to the operation rod 1 of the brush cutter. For example, from the state shown in FIG. 1 (the state in which the gear head 10 and the operation rod 1 protrude from a specific small opening 54 a of the support 50), the latching change 53 of the support 50 is removed from the latching protrusion 36 of the casing 30. Rotate the hooking piece 53 and the hooking projection 36 by one unit of angular interval in the clockwise or counterclockwise direction, and hook the hooking piece 53 on the hooking part 36 at that position. As described above, the circumferential angular position of the discharge port OP of the casings 30 and 40 with respect to the operating rod 1 can be changed and adjusted to the right side or the left side position of the solid line position in FIG. it can.

Embodiment 2
FIG. 7 is a bottom view showing the entire snow removal attachment as a brush cutter attachment according to Embodiment 2 of the present invention. FIG. 8 is a sectional view showing a snow removal attachment according to Embodiment 2 of the present invention. As in the first embodiment, the brush cutter attachment according to the second embodiment removes the rotary blade (cutting blade) of the shoulder-type brush cutter, and replaces the rotary blade with the tip of the pipe-shaped operation rod 1 of the brush cutter. The gear head and the rotary blade of the brush cutter are interchangeable. Specifically, as shown in FIGS. 7 to 8, the brush cutter attachment according to the second embodiment is embodied as a snow removal attachment, and constitutes a gear head 10, a snow removal rotating body 120 as a rotating body, and a housing. And a support 50 that also constitutes a casing.

  More specifically, the snow removal rotator 120 has a plurality of (five in the illustrated example) blades 122 arranged at equal intervals in the circumferential direction (72-degree intervals) on one side surface (upper surface) in the thickness direction of the disk-shaped base 121. ) In the form of a centrifugal fan. Each blade 122 has a curved plate shape that extends slightly curved in the rotation direction, and improves snow removal efficiency. At the center of one side surface in the thickness direction of the snow removal rotating body 120, a ring-like support protrusion 123 protrudes slightly upward and is integrally formed, and a circular recess-like fit is formed on the inner peripheral surface of the support protrusion 123. A recess 123a is formed. A small-diameter circular insertion hole (not shown) is formed through the center of the fitting recess 123a of the snow removal rotating body 120. Then, the lower end of the bearing 19 is fitted and mounted in the fitting recess 123a of the snow removal rotating body 120, and the protruding portion of the output shaft 16 of the gear head 10 is inserted into the insertion hole of the snow removal rotating body 120 to remove snow. The rotating body 120 is protruded to the other side surface in the thickness direction, and in this state, the nut 25 is screwed onto the tip of the output shaft 16 of the gear head 10 to attach the snow removal rotating body 120 to the gear head 10 via the bearing 19. The snow removal rotating body 120 is rotated in synchronization with the rotation of the output shaft 16 of the gear head 10. As described above, the snow removal rotating body 120 is coaxially fixed to the output shaft 16 of the gear head 10 in the same manner as the blower fan 20 of the first embodiment, and rotates around the rotation shaft in synchronization with the rotation of the output shaft 16. On the other hand, it is a centrifugal fan in which a plurality of blades 122 are arranged facing downward, and is a rotating body that can remove snow by rotating the plurality of blades 122.

  The casing 130 has the same configuration as that of the upper portion obtained by dividing the scroll casing into two vertically. The configuration is the same as that of the upper casing 30 of the first embodiment. Specifically, the casing 130 forms a large opening 131 a having a large diameter circle at the center of the disk-shaped upper wall 131. Further, the peripheral wall 132 is integrally formed so as to hang down continuously to the entire length of the outer peripheral edge of the upper wall 131. Further, a short cylindrical inner upright portion 134 is vertically suspended and integrally formed at the periphery of the large opening 131 a of the upper wall 131, and on the outer side of the inner upright portion 134 in a radial direction in the radial direction of the upper wall 131. A short cylindrical outer rising portion 135 is vertically formed integrally. Further, the upper surface portion (ring-shaped portion 131b) of the upper wall 131 between the inner upright portion 134 and the outer upright portion 135 is integrally provided with a plurality of block projections 136 that form a plurality of blocks at predetermined intervals in the circumferential direction. Is formed. Each of the latching protrusions 136 is formed with a slit-like latching groove 136a so as to extend in the circumferential direction (clockwise direction) of the large opening 131a of the upper wall 131 to the middle (a predetermined angle). A semi-cylindrical discharge tube portion 137 that forms a discharge port is integrally formed on the side surface of the casing 130.

  The casing 130 is a semi-scroll casing-shaped hollow body that houses the snow removal rotating body 120 inside and covers the entire snow removal rotating body 120 (upper surface side, outer peripheral surface side), and on one side in the thickness direction of the hollow body. The large opening 131a is formed as an intake port on a certain upper surface. Further, the casing 130 has a semi-cylindrical discharge cylinder portion 137, and serves as a snow removal discharge port protruding from the side surface of the hollow body by a semicircular or semi-elliptical opening at the tip of the discharge cylinder portion 37. A discharge port OP is formed. On the other hand, the casing 130 has the snow removal rotating body 120 attached therein to cover the upper surface side and the outer peripheral surface side of the snow removal rotation body 120, and the entire lower surface side is opened and disposed below the snow removal rotation body 120. The plurality of blades 122 are formed of a hollow body having a hollow shape which is a snow removal opening that is exposed downward. That is, the periphery of the lower end of the casing 130 is a large-diameter circular snow removal opening 131c. As in the first embodiment, the support 50 can be mounted and removed on the ring-shaped portion 131b of the upper wall 131 located on the outer peripheral side of the large opening 131a of the casing 130. That is, the peripheral wall 52 of the support 50 is attached to the ring-shaped portion 131b of the casing 130 and rotated clockwise, so that the latching piece 53 of the support 50 becomes the latching groove of the latching projection 136 of the casing 130. It slides into 136a and is latched by the latching protrusion 136. Thereby, the support body 50 is attached to the casing 130 so as not to be detached in the vertical direction.

  In order to use the snow removal attachment according to the second embodiment, the snow removal rotary body is housed inside the casing 130 with the blades 122 of the snow removal rotary body 120 facing downward. In this state, the gear head 10 attached to the upper surface side of the snow removal rotating body 120 is entirely exposed from the large opening 131a of the casing 30, and the base end portion (upper end portion) of the upper case portion 11 is the periphery of the large opening 131a. Try to be in the vicinity. Next, the support body 50 is attached to the ring-shaped portion 131b of the casing 130 from this state. At this time, the base end portion of the upper case portion 11 of the gear head 10 is exposed and protruded from a desired small opening 54a among the plurality (six) of small openings 54a of the support body 50. Then, a holding bolt 56 is screwed into the support 50, and its tip (lower end) is brought into contact with the upper surface of the lower case portion 15 of the gear head 10. The driving shaft 2 of the brush cutter is drivingly connected to the transmission shaft 12 of the gear head 11. At this time, as in the first embodiment, it is preferable to provide a fixing means such as a belt-like elastic body in the casing 130 and fix the operating rod 1 to the casing 130 by the fixing means.

  In this way, the snow removal attachment that is attached to the tip of the operating rod 1 of the brush cutter instead of the rotary blade (the cutting blade) allows the user (operator) to operate the operating rod 1 (and the handle of the operating rod 1) of the brush cutter. By gripping and operating, the snow removal work by rotation of the snow removal rotating body 120 can be performed. At this time, in the snow removal attachment attached to the tip of the operating rod 1, the casing 130 is suspended and supported by the gear head 10 at the tip of the operating rod 1 via the holding bolt 56. That is, when the driving shaft 2 is rotated by driving the motor of the brush cutter from this state, the snow removal rotating body 20 rotates synchronously via the gear head 10. Therefore, by pressing the snow removal opening 131c on the lower surface side of the casing 130 against the snow accumulation surface to be removed, the blade 122 of the snow removal rotating body 120 exposed to the entire snow removal opening 131 writes the snow accumulation by the shearing force or the like due to the rotation. In this manner, it is removed, and the internal space of the casing 130 is rotated and moved, and finally discharged from the discharge port OP of the discharge cylinder portion 137 and discharged.

  As described above, in the snow removal attachment according to the second embodiment, the casing including the casing 130 and the support body 50 positions the gear head 10 relative to the casing 130 in the same manner as in the first embodiment. And the relative rotation between the casing 130 and the same effect. In addition, since it is possible to change the angular position of the discharge port 137 for removing snow by selecting a plurality of small openings 54b, the discharge port OP of the snow removal attachment with respect to the operation rod 1 can be changed according to the situation of an obstacle or the like at the work place. The angle position can be arbitrarily changed in a plurality of stages, and snow removal work can be performed under optimum conditions.

  By the way, the brush cutter attachment of the present invention can be embodied as an arbitrary attachment that performs work by a rotating body, in addition to the blower attachment and the snow removal attachment as described above. Further, in the brush cutter attachment of the present invention, the small opening of the housing has an elliptical shape, a circular shape, a polygonal shape or the like corresponding to the outer shape of the upper case portion 11 of the gear head 10 or the operation rod 1 in addition to the fan shape. It can be made into an arbitrary shape such as a hole. Furthermore, the support or contact position of the gear head by the holding screw attached to the housing can be not only the upper surface of the lower case portion 15 of the gear head but also other parts. Alternatively, any support form can be adopted in addition to supporting the rotating body on the casing as in the above embodiment. Moreover, the casing of the said embodiment can be formed by integral molding of a synthetic resin. Furthermore, the support body 50 can be formed of a metal material or a synthetic resin material. The rotating body can also be integrally formed of a synthetic resin material or the like. On the other hand, as shown by a virtual line (double-dotted line) in FIG. 1, as a support body, it is composed of only a predetermined number (for example, 6) of strip-shaped partition portions 154, and a multiple limb shape in which a ring portion and a peripheral wall are omitted. It is also possible to use the support 150 as an integral part of the above. In this case, since the rectangular plate-shaped bent portion 155 at the tip of each partition portion 154 of the support 150 corresponds to the latch piece of the above embodiment, the latch protrusion formed on the ring-shaped portion 31b of the casing 30. The number of 36 is also the same as the number of the partition portions 154 and the bent portions 155 (six in the illustrated example), and is arranged at the same interval as the arrangement interval of the partition portions 154 and the bent portions 155. Further, the support body may be formed integrally with the casing to constitute the housing, in addition to being detachable from the casing as a separate body from the casing. In this case, when the casing is not disassembled and assembled, it is necessary to project the upper case portion of the gear head from a desired small opening of the housing in advance. The upper case portion of the gear head is protruded from a desired small opening of the housing. Furthermore, a net-like member may be attached or fixed integrally or separately to the small openings between the partition portions of the support in order to prevent foreign substances from entering from the outside. In particular, in the case of the blower attachment as in Embodiment 1, it is preferable to attach a mesh member to the small opening of the support. In particular, in the case of the configuration as in the first embodiment, if the support is formed of a flexible material, the rotating body can be elastically supported between the casing and the casing via the pressing bolt. . Furthermore, the blower fan according to the first embodiment can have any configuration as long as it has a centrifugal fan configuration, and the number of blades can also be an appropriate number. Also, as the snow removal rotating body of the second embodiment, any structure can be used as long as it is configured to be able to remove snow by pressing against the snow surface. The number of blades can also be an arbitrary number. However, in the case of the snow removal rotator, the space between the blades functions as a snow removal space, the snow removal rotator rotates while holding the removed snow in the snow removal space, and the snow in the snow removal space is discharged from the discharge port OP. It becomes composition. Therefore, the snow removal rotating body has a smaller number of blades than the case of the blower fan, such as the number of blades 122 of the snow removal rotary body 120 is five (half the blower fan 20), as in the second embodiment. It is preferable to increase the snow removal efficiency by increasing the snow removal space. Here, the number of blades of the snow removal rotating body is preferably a small number of 4 or more, for example, a range of 4 to 8 sheets, and more preferably a range of 4 to 6 sheets.

FIG. 1 is a perspective view showing the entirety of a blower attachment as a brush cutter attachment according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view showing an upper case and a support of the casing of the blower attachment according to Embodiment 1 of the present invention. FIG. 3 is an exploded perspective view showing the lower case, the rotating body, and the gear head of the casing of the blower attachment according to Embodiment 1 of the present invention. FIG. 4 is a plan view showing the blower attachment according to Embodiment 1 of the present invention. FIG. 5 is a cross-sectional view showing the blower attachment according to Embodiment 1 of the present invention. FIG. 6 is a plan view showing the inside of the casing by removing the upper case of the blower attachment according to Embodiment 1 of the present invention. FIG. 7 is a bottom view showing the entire snow removal attachment as a brush cutter attachment according to Embodiment 2 of the present invention. FIG. 8 is a sectional view showing a snow removal attachment according to Embodiment 2 of the present invention.

Explanation of symbols

2: Drive shaft, 10: Gear head, 16: Output shaft, 20: Blower fan (rotating body)
30: Upper casing (housing), 31a: Large opening, 40: Lower casing (housing)
50: Support body (housing), 51a: Large opening, 54a: Small opening 56: Press bolt (press screw), 120: Snow removal rotating body, OP: Discharge port

Claims (6)

A rotating body fixed to the output shaft of the gearhead of the brush cutter and rotating in synchronization with the rotation of the output shaft;
A hollow hollow body that covers the outside of the rotating body by attaching the rotating body inside, the base end of the gear head is exposed on the upper surface side of the hollow body, and the gear head and the drive shaft of the brush cutter The gear head is relatively positioned in the circumferential direction by locking the gear head or the drive shaft portion of the brush cutter with a peripheral edge of the small opening. A brush cutter attachment comprising a housing that prevents relative rotation with the brush cutter. A gear head detachably coupled to the drive shaft of the brush cutter and having an output shaft that is synchronously rotated by the drive shaft of the brush cutter;
A rotating body fixed to the output shaft of the gear head and rotating in synchronization with the rotation of the output shaft;
A hollow hollow body that covers the outside of the rotating body by attaching the rotating body inside, the base end of the gear head is exposed on the upper surface side of the hollow body, and the gear head and the drive shaft of the brush cutter The gear head is relatively positioned in the circumferential direction by locking the gear head or the drive shaft portion of the brush cutter with a peripheral edge of the small opening. A brush cutter attachment comprising a housing that prevents relative rotation with the brush cutter. The casing is formed of a hollow hollow body that is supported by the gear head on the extension line of the rotating shaft of the rotating body and covers the outside of the rotating body, and forms a large opening on the upper surface side of the hollow body, A casing in which a discharge port is formed on a side surface of the hollow body, and a detachably attached to a large opening of the casing to expose a base end of the gear head, and a base end of the gear head and a drive shaft of the brush cutter And a support body that forms a plurality of small openings in the circumferential direction that allow connection with the
By selecting one of a plurality of small openings in the support body, the base end of the gear head can be exposed through the small openings, and the drive shaft of the gear head or the brush cutter is locked by the peripheral edge of the small openings. The gear head is positioned relative to the casing to prevent relative rotation between the gear head and the casing, and a plurality of small openings in the support are selected to expose the gear head from the small openings. Thus, the brush cutter attachment according to claim 1 or 2, characterized in that the circumferential angular position of the outlet of the casing with respect to the drive shaft of the brush cutter can be changed and adjusted. The rotating body is a blower fan including a centrifugal fan,
The casing is formed of a scroll casing-like hollow body that covers the entire blower fan, and the large opening is formed as an intake port on an upper surface that is one side surface in the thickness direction of the hollow body, and the side surface of the hollow body 4. The discharge port as a blower port is formed in the air passage, and a portion other than the large opening and the discharge port is sealed to make the inside a conditioned space. 5. Brush cutter attachment. The rotating body is a blower fan including a centrifugal fan,
The casing is formed of a scroll casing-like hollow body that covers the whole of the blower fan, and the large opening is formed as an intake port on an upper surface that is one side surface in the thickness direction of the hollow body, and on the side surface of the hollow body. Forming a discharge port as a blower port, sealing the part other than the large opening and the discharge port to make the inside a conditioned space,
The support body has a hook portion on the outer periphery thereof that can be engaged with a peripheral edge portion of the large opening of the casing, and has a shape and size larger than the outer periphery of the base end portion of the gear head. Forming a plurality of small openings that are exposed to the outside in an inclined state at a constant angle in the circumferential direction, and screwing a pressing screw into the center thereof,
The pressing screw is screwed into the center of the support and protrudes into the casing, and the pressing screw is adjusted by adjusting the protruding amount into the casing by increasing or decreasing the screwing amount of the pressing screw. 4. The brush cutter attachment according to claim 3, wherein a tip of the shaft portion is abutted against and pressed against the upper surface of the gear head, and the blower fan is rotatably sandwiched between the gear head and the bottom surface of the casing. The rotating body is in the form of a centrifugal fan in which a plurality of blades are arranged facing downward, and is a snow removal rotating body that can remove snow by rotation of the plurality of blades,
The housing has a plurality of snow removal rotators attached to the inside thereof to cover the upper surface side and the outer peripheral surface side of the snow removal rotator, and the lower surface side is opened and arranged below the snow removal rotator. The brush cutter attachment according to any one of claims 1 to 3, comprising a hollow hollow body having a snow removal opening exposing the entire blade downward.

Images