JP2009195209A - Weeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform rationalization of attaching constitution of a cover for preventing scattering of soil, in a weeder for weeding while digging top soil by providing a protruded body on the lower surface of a rotating disk. <P>SOLUTION: The weeder is characterized in that a vertical driving shaft 5 provided in a transmission gear box 4 and rotating in conjunction with a transmission shaft 2 is installed on a cylindrical frame 3 in which a transmission shaft 2 attaching an engine and transmitting power of the engine is internally installed at the rear end and a transmission gear box 4 is installed on the top side, and a disk 6 in which claw bodies 7, 7, etc., are installed on the lower surface is fixed to the vertical driving shaft 5 and a cover frame 16 which is vertically swingable by using a mounting part with the cylindrical frame 3 as a supporting point and fixable at an arbitrary angle with the cylindrical frame 3 is installed and a cover body for covering all or a part of the peripheral part of the disk 6 is installed on the cover frame 16. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a weeder.

Conventionally, a configuration in which a weed brush cutter has a function of stirring weed and topsoil by cutting a cutter blade is known (Patent Documents 1 and 2), and further, a blade exclusively for rotary weeding of this weeding and topsoil stirring function, The structure provided with the cover which prevents scattering is known (patent document 3).
Japanese Utility Model Publication No. 5-4831 Japanese Utility Model Publication No. 52-132831 Japanese Utility Model Publication No. 7-43558

  As in the above-mentioned Patent Document 3, the cover is configured to prevent the scattering of the agitated soil and grass, but since the cover is fixed to the transmission case portion at the tip of the work machine arm, As the wear of the lower edge progresses, the distance between the blade for exclusive use of weeding and the lower edge of the earth and sand agitation blade becomes large, and the scattering of the soil outside the cover becomes significant.

  In addition, the cover is fixed to the transmission case, and maintains a fixed and substantially parallel relationship with the rotary transmission plate to which the blade for exclusive use of weeding or earth and sand agitation blade is attached. The work must be performed while maintaining the ground angle of the plate substantially constant, which impairs workability.

In view of the above, the present invention has taken the following technical means.
That is, the invention according to claim 1 is equipped with a transmission shaft (2) for mounting the engine (1) at the rear end and transmitting the power of the engine (1), and a transmission gear box (4) at the front end side. The cylindrical frame (3) provided with a vertical drive shaft (5) provided in the transmission gearbox (4) and rotating in conjunction with the transmission shaft (2) is provided on the vertical drive shaft (5). Is fixed to a disc (6) having claws (7, 7,...) Arranged on the lower surface, and can be swung up and down with a mounting portion with the cylindrical frame (3) as a fulcrum. 3) A cover frame (16) that can be fixed at an arbitrary angle with respect to 3) is provided, and a cover body (10a, 10b) that covers all or part of the periphery of the disc (6) is provided on the cover frame (16). ) To provide a weeder configuration.

  If comprised in this way, it will be attached to a cylinder frame (3) via a cover frame (16) with respect to a disk (6) attached to a vertical drive shaft (5) supported by a cylinder frame (3). The cover body (8) can be adjusted to swing up and down independently of the disc (6). Moreover, when taking the work form which makes the ground angle of the disc (6) incline upward or downward in the traveling direction, the angle of the cover body (8) is arbitrarily adjusted to maintain the ground horizontal posture.

  The invention according to claim 2 is configured such that the cover body (8) is suspended from the cover frame (16) via front and rear struts (14, 14,...) Having adjustable vertical effective lengths. The configuration of the weeder described in 1. Thereby, the cover body (8) can finely adjust the front-rear angle with respect to the cover frame (16).

  According to a third aspect of the present invention, the cover body (8) comprises an upper cover (9) that covers the upper surface of the disk (6) and side covers (10a, 10b) that cover the outer periphery of the disk (6). The weeding machine according to claim 1 or 2, wherein the upper cover (9) is provided with a through hole (9a) for allowing the transmission gearbox (4) to pass through. Of the cover body (8), the upper cover (9) covering the upper surface covers the upper surface of the disc (6), and the side covers (10a, 10b) cover the side surfaces of the disc (6).

  According to a fourth aspect of the present invention, the auxiliary wheel (21) is provided on the cover frame (16) via a stay (22) so as to be switchable between a grounding posture and a non-grounding posture. The weeder configuration. When the auxiliary wheel (21) is in the ground contact posture, the straight traveling performance can be improved, and when performing the weeding operation while reciprocating left and right without moving straight, the auxiliary wheel (21) is set in the non-ground contact posture.

  According to the first aspect of the present invention, the cylindrical frame (3) is connected to the disc (6) mounted on the vertical drive shaft (5) supported by the cylindrical frame (3) via the cover frame (16). The cover body (8) mounted on the base plate can be swung up and down independently of the disk (6), and the lower edge of the claw body (7, 7 ...) on the lower surface of the disk (6) and the lower edge of the cover Can be adjusted. In addition, when taking a work form in which the ground angle of the disc (6) is inclined upward or downward in the traveling direction, the angle of the cover body (8) can be arbitrarily adjusted to maintain the horizontal posture, and the agitated soil is scattered. Can be prevented.

  In the second aspect of the invention, the cover body (8) is suspended from the cover frame (16) via the front and rear support columns (14, 14,...) Whose adjustable vertical effective length is adjustable. 8) can finely adjust the front-rear angle with respect to the cover frame (16), improving workability.

  In the invention according to claim 3, the upper cover (9) covering the upper surface of the cover body (8) covers the upper surface of the disk (6), and the side covers (10a, 10b) are formed of the disk (6). A side surface can be covered, and the scattering prevention effect of agitation soil improves. In particular, a large-diameter through hole (9a) is formed in the upper cover (9) to secure an arrangement space for the transmission gear box (4). The adjustment structure can be easily configured.

  The invention according to claim 4 can improve the rectilinearity when the auxiliary wheel (21) is in the ground contact posture, and when performing the weeding work while reciprocating left and right without moving straight, the auxiliary wheel (21) may be in the non-ground posture. Improve workability.

Embodiments of the present invention will be described below with reference to the drawings.
A transmission gear box 4 is provided at the front end of a cylindrical frame 3 in which the engine 1 is mounted at the rear end and the transmission shaft 2 driven by the engine 1 is housed. An interlocking bevel gear (not shown) that interlocks the rotation of the transmission shaft 2 with the vertical drive shaft 5 is provided inside the transmission gear box 4.

  A disc 6 is detachably fixed to the vertical drive shaft 5, and a plurality of (six in the illustrated example) claw bodies 7, 7... Are radially welded to the lower surface of the disc 6. The bodies 7, 7... Are formed with a predetermined thickness and a predetermined length, and are attached at regular intervals on the outer peripheral side of the disk 6, with their longitudinal extension lines deviating from the rotation center P of the disk 6. It is arrange | positioned so that the angle (theta) with respect to it may be exhibited.

  A cover body 8 that covers the rotating part composed of the disk 6 and the claw bodies 7, 7... Is formed. The cover body 8 is provided along a horseshoe-shaped upper cover 9 and the periphery of the upper cover 9. An arc-shaped front side cover 10a made of a flexible band plate material and a straight rear side cover 10b made of the same flexible band plate material, and a through hole 9a having a large diameter is formed at the center of the upper cover 9. Thus, the transmission gear box 4 is provided so as to be arranged.

  Brackets 11, 11... Having long holes 11a, 11a extending in the vertical direction are provided on the periphery of the upper cover 9, and the front side cover 10a and the rear side cover 10b are connected to the brackets 11, 11 with bolts and nuts 12, Tightened and fixed at 12 ...

  The other brackets 13, 13... Are erected at four positions on the upper surface of the upper cover 9 in the front, rear, left, and right directions, and the holes 13a, 13a,. Are provided with rod-shaped columns (hereinafter referred to as rod columns) 14, 14. In other words, the L-shaped bent portion of the base portion of the rod struts 14, 14... Having the screw portions 14 a, 14 a formed at the tip ends is fitted into the holes 13 a, 13 a.

  On the front end side of the frame cylinder 3, four hexagon bolts are arranged vertically in the middle with the frame cylinder 3 sandwiched between the central portion 15 a and the lower portion 15 b in a three-layer structure of upper and lower layers. A support metal 15 is provided which is fixed by being tightened so as to reduce the distance L1 between the two at 15d, 15d. Between the upper portion 15c and the central portion 15a of the support metal 15, a cross beam frame 16 is provided as a cover frame in which four rods 16a, 16a, 16b, 16b are combined with the cross beam and fixed. That is, the connecting rod 17 formed so as to connect the rear end portions of the front and rear facing rods 16a, 16a of the cross frame 16 is supported, and the supporting metal 15 can be swung up and down around the connecting rod 17 as an axis. The spacer frame 16 is configured to be fixed to the cylindrical frame 3 while maintaining a predetermined angle α by tightening hexagon bolts 15e, 15e.

Plate pieces 18, 18... That can penetrate the rod columns 14, 14.
It is configured to be able to pass through the upper part of the rod struts 14, 14... To the plate pieces 18, 18. The frame 16 can be fixed in a suspended manner. Therefore, the front side cover 10a and the rear side cover 10b are changed by changing the effective length of the front, rear, left and right rod columns 14, 14..., That is, the length from the upper cover 9 side end portion to the fixing portion to the plate piece 18. The front edge and the rear inclination of the lower edge or a horizontal posture can be adjusted, and in addition, the upper cover 9 is vertically adjusted relative to the disc 6 and the claw bodies 7, 7. 7, 7... Is configured so that the amount of protrusion of the lower edge of the front side cover 10a and the rear side cover 10b with respect to the lower edges can be finely adjusted.

  A bracket 20 is provided in the middle of the front rod 16b of the constituent rods of the cross frame 16, and a stay 22 of the auxiliary wheel 21 is fixed by bolts and nuts 23 so that the vertical angle can be adjusted. In addition to improving the rectilinearity of the main body, the auxiliary wheel 21 can adjust the contact height of the disc 6 with respect to the claw bodies 7, 7... And can adjust the amount of topsoil cut off by the claw bodies 7, 7. is there.

  In addition, if the auxiliary wheel 21 is configured so as to be pivoted upward and fixed and held, the auxiliary wheel 21 is in a non-grounded state, and the induction action can be released. At this time, it is possible to work widely from side to side while swinging the cylindrical frame 3 back and forth with a handle described later.

Reference numeral 24 denotes an operation handle disposed on the upper side of the cylindrical frame 3, and 25 denotes a scattering prevention plate for preventing the excavation soil and pebbles from scattering backward.
The operation of the above example will be described.

  About the operation | work which mounts the main-body part of the weeding machine which concerns on this invention to the cylinder frame 3, using a well-known cylinder frame 3 with a commercially available mower etc., a disk blade is removed from this vertical drive shaft 5, and instead The weeding machine of the present invention is attached to the vertical drive shaft 5.

  First, the support metal 15 for connecting the cross beam frame 16 is attached to the cylindrical frame 3. The hexagon bolts 15a and 15a are screwed loosely so that the cross beam frame 3 can freely swing up and down around the fitting portion 17. In this state, the cover body 8 is assembled to the cross frame 16. That is, the lower ends of the rod columns 14, 14... Are fitted into the brackets 13, 13,... Of the upper plate 9, and the upper side is passed through the corresponding plate pieces 18, 18.

Following the temporary fixing of the cover body 8, the disc 6 is mounted on the vertical drive shaft 5 protruding from the transmission gear box 4 that is seen in the through hole 9 a of the upper cover 9.
When the above installation work is completed, the adjustment work is performed. The claw bodies 7, 7... Arranged on the lower surface of the disc 6 are arranged so that the amount of protrusion from the lower edges of the cover body 8, that is, the front side cover 10a and the rear side cover 10b is substantially appropriate. The angle α with respect to the cylindrical frame 3 is determined and the hexagon bolts 15a, 15a. Finally, the length of the four rod struts so that the level of the upper cover 9 with respect to the disk 6 is appropriate and the amount of protrusion from the lower edge of the front side cover 10a and the rear side cover 10b is optimal. That is, the fixing position of each rod column 14 to each plate piece 18 by the nut 19 is adjusted.

  After the above preparation work, weeding work is performed. The engine 1 is started, slowly lowered onto the ground to be weeded, and goes straight with the claws 7, 7, ... of the disc 6 acting on the surface layer. The surface soil is scraped off with the weeds to be vegetated by the rotation of the claws 7, 7,... At this time, the claw bodies 7, 7... Are arranged so that the extension line in the longitudinal direction deviates from the rotation center P of the disk 6 and exhibits an angle θ with respect to the rotation direction A. The mowing grass tends to move toward the longitudinal drive shaft 5 side, that is, toward the center side, and can be prevented from overflowing from the front side cover 10a and the rear side cover 10b, thereby preventing deterioration of the working environment.

  In addition, the auxiliary wheel 21 improves the straightness, but by adjusting the mounting angle of the stay 22 of the auxiliary wheel 21, the amount of scraping of the surface layer by the claws 7, 7, ... can be made substantially constant, You can clean the finishing marks.

  When the lower edge of the front side cover 10a or the rear side cover 10b is worn and the distance from the claw bodies 7, 7,... Becomes lower, the long holes 11a provided in the brackets 11, 11,. , 11a, etc., the front side cover 10a and the rear side cover 10b can be lowered to obtain an appropriate excavation state. In this embodiment, in addition to this adjustment, the claw bodies 7, 7... The lower edge and the front side cover 10 a, based on a configuration in which the fixing positions of the rod posts 14, 14. The distance from the lower edge of the rear side cover 10b can be adjusted. Moreover, the advancing direction may be forward or backward, and can be appropriately performed according to the terrain or work posture.

  In the above embodiment, the angle α of the cross beam frame 16 with respect to the cylindrical frame 3 is determined, and the hexagon bolts 15a, 15a... Of the support metal 15 can be tightened. The angle α can be adjusted. Therefore, even if the angle formed by the existing cylindrical frame 3 and the vertical drive shaft 5 is various, it can be easily handled.

It is a whole perspective view of a weeder. It is an expansion perspective view of the principal part. It is a sectional side view of the principal part. It is the perspective view which the principal part reversed. It is an enlarged plan view of a well frame. It is the expansion perspective view (A) of the support metal, the front view (B), and the side view (C). 1 Engine 2 Transmission shaft 3 Cylindrical frame 4 Transmission gear box 5 Vertical drive shaft 6 Disc 7 Claw body 8 Cover body 9 Upper cover 9a Through hole 10a Front side cover 10b Rear side cover 11 Bracket 12 Bolt / Nut 13 Bracket 14 Rod Support post 15 Support metal 15a Center part 15b Lower part 15c Upper part 15d Hexagon bolt 15e Hexagon bolt 16 Cross girder frame (cover frame) 17 Connecting rod 18 Plate piece 19 Nut 20 Bracket 21 Auxiliary wheel 22 Stay 23 Bolt Nut 24 Operation handle 25 Spatter prevention plate

Claims (4)

A cylindrical frame (3) equipped with a transmission shaft (2) for mounting the engine (1) at the rear end and transmitting the power of the engine (1) and having a transmission gear box (4) at the front end side, A vertical drive shaft (5) provided in the transmission gear box (4) and rotating in conjunction with the transmission shaft (2) is provided, and the vertical drive shaft (5) has claw bodies (7, 7,. The disk (6) provided with the frame can be fixed, can be swung up and down with the mounting portion with the cylindrical frame (3) as a fulcrum, and can be fixed at any angle with respect to the cylindrical frame (3) Weeding machine characterized in that a cover frame (16) is provided and a cover body (10a, 10b) is provided on the cover frame (16) to cover all or part of the circumference of the disc (6). . The weeding machine according to claim 1, wherein the cover body (8) is suspended from the cover frame (16) via front and rear struts (14, 14 ...) whose adjustable vertical effective length is adjustable. The cover body (8) includes an upper cover (9) that covers the upper surface of the disk (6) and side covers (10a, 10b) that cover the outer periphery of the disk (6), and the transmission gear is connected to the upper cover (9). The weeding machine according to claim 1 or 2, wherein a through hole (9a) is provided through which the box (4) can be seen. The weeder according to claim 1, wherein the cover wheel (16) is provided with the auxiliary wheel (21) switchable between a grounding posture and a non-grounding posture via a stay (22).

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