WO2020261996A1 - Walking type cultivator - Google Patents

Walking type cultivator Download PDF

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Publication number
WO2020261996A1
WO2020261996A1 PCT/JP2020/022869 JP2020022869W WO2020261996A1 WO 2020261996 A1 WO2020261996 A1 WO 2020261996A1 JP 2020022869 W JP2020022869 W JP 2020022869W WO 2020261996 A1 WO2020261996 A1 WO 2020261996A1
Authority
WO
WIPO (PCT)
Prior art keywords
wheel support
guide member
support member
wheel
interlocking
Prior art date
Application number
PCT/JP2020/022869
Other languages
French (fr)
Japanese (ja)
Inventor
瀬崎恵一
前田伸治
山下泰直
中島雅大
打谷賢
田中仁司
増田繁
平田智也
Original Assignee
株式会社クボタ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社クボタ filed Critical 株式会社クボタ
Priority to CN202080033056.0A priority Critical patent/CN113853110B/en
Publication of WO2020261996A1 publication Critical patent/WO2020261996A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
    • A01B33/02—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on horizontal shaft transverse to direction of travel
    • A01B33/021—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on horizontal shaft transverse to direction of travel with rigid tools
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B13/00—Ploughs or like machines for special purposes ; Ditch diggers, trench ploughs, forestry ploughs, ploughs for land or marsh reclamation
    • A01B13/02—Ploughs or like machines for special purposes ; Ditch diggers, trench ploughs, forestry ploughs, ploughs for land or marsh reclamation for making or working ridges, e.g. with symmetrically arranged mouldboards, e.g. ridging plough
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
    • A01B33/02—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on horizontal shaft transverse to direction of travel
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
    • A01B33/08—Tools; Details, e.g. adaptations of transmissions or gearings
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
    • A01B33/08—Tools; Details, e.g. adaptations of transmissions or gearings
    • A01B33/082—Transmissions; Gearings; Power distribution
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
    • A01B33/08—Tools; Details, e.g. adaptations of transmissions or gearings
    • A01B33/10—Structural or functional features of the tools ; Theoretical aspects of the cutting action
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
    • A01B63/14—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements drawn by animals or tractors
    • A01B63/16—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements drawn by animals or tractors with wheels adjustable relatively to the frame

Definitions

  • the present invention relates to a configuration of a guide member and wheels of a walking type management machine.
  • Patent Document 1 As a walking type management machine, there is one as disclosed in Patent Document 1.
  • guide members for guiding the soil from the rotary tillage device to the left and right outside are arranged behind the rotary tillage device and supported by the machine body so as to be movable in the front-rear direction.
  • the wheels are arranged on the rear side of the guide member, and a wheel support member for supporting the wheels in the front-rear direction is provided, and the guide member and the wheel support member can be integrally moved in the front-rear direction. It is configured.
  • the operator moves the guide member and the wheel support member to the rear side and fixes them to the machine body.
  • the machine body is advanced while driving the rotary tillage device in this state, the soil from the rotary tillage device is guided to the left and right outside by the guide member.
  • the operator moves the guide member and the wheel support member to the front side and fixes them to the machine body while the rotary tillage device is stopped. In this state, the operator can lift the rotary tillage device while keeping the wheels in contact with the ground by pushing down while holding the steering handle, and can move on the road or the like.
  • Patent Document 1 when performing ridge forming work or soil gathering work, the operator needs to manually move the guide member and the wheel support member to the rear side and fix them to the machine body by a connecting member or the like. Similarly, when moving the walking type management machine, the operator needs to manually move the guide member and the wheel support member to the front side and fix them to the machine body by a connecting member or the like, which improves workability. There is room for.
  • An object of the present invention is to improve workability when the guide member and the wheel support member are moved and operated in the front-rear direction in the walking type management machine.
  • the walk-behind management machine of the present invention is located below the driving part supported by the machine, a steering handle supported by the machine so as to extend rearward from the machine, and the driving part.
  • a rotary tiller that is supported by the aircraft and driven by the power of the driving unit, and a rotary tiller that is arranged on the rear side of the rotary tiller in a side view and is movable in the front-rear direction.
  • the guide member for guiding the soil from the rotary tillage device to the left and right outside, the wheel arranged on the rear side with respect to the guide member in the side view, and the wheel so as to be movable in the front-rear direction.
  • a wheel support member that supports the machine body and an urging mechanism that integrally urges the guide member and the wheel support member to the front side are provided, and the guide member and the wheel support member are urged. It is possible to move to the front side approaching the rotary tillage device by the mechanism, and to move to the rear side away from the rotary tillage device against the urging mechanism by the action of soil from the rotary tillage device.
  • the guide member when the ridge forming work and the soil gathering work are performed, when the machine body is advanced while driving the rotary tillage device, the soil from the rotary tillage device is guided to the left and right outside by the guide member.
  • the guide member due to the action of soil from the rotary tiller, the guide member is pushed to the rear side, and the guide member and the wheel support member are integrated and move to the rear side away from the rotary tiller against the urging mechanism.
  • the guide member will be placed in an appropriate position by the guidance of the soil from the rotary tiller.
  • the guide member and the wheel support member are integrally attached. It moves to the front side approaching the rotary tiller by the force mechanism. With the wheel support member moving forward and the wheels approaching the rotary tiller, the operator can lift the rotary tiller relatively easily while holding the steering handle and pushing it down, while keeping the wheels in contact with the ground. Yes, it is possible to move on the road.
  • the guide member and the wheel support member move in the front-rear direction depending on the presence or absence of the action of soil from the rotary tiller, and the operator can move the guide member and the wheel support member together. It is no longer necessary to manually move it in the front-rear direction and fix it to the machine body by a connecting member or the like, which improves the workability of the walking type management machine.
  • the guide member and the wheel support member are provided with an interlocking mechanism for integrally moving the guide member and the wheel support member in the front-rear direction.
  • the guide member and the wheel support member can be stably and integrally moved in the front-rear direction by the interlocking mechanism.
  • the urging mechanism urges the wheel support member to the front side and is attached to the interlocking mechanism to one of the guide member and the wheel support member to support the guide member and the wheel support.
  • An interlocking member extending toward the other of the members and a pressure receiving surface portion attached to the other of the guide member and the wheel support member and facing the interlocking member are provided, and the rotary tillage is provided.
  • the movement of the guide member to the rear side due to the action of soil from the device is transmitted to the wheel support member by the contact between the interlocking member and the pressure receiving surface portion, and the wheel support is opposed to the urging mechanism.
  • the member is movable to the rear side, and the movement of the wheel support member by the urging mechanism to the front side is transmitted to the guide member by contact between the interlocking member and the pressure receiving surface portion, and the guide member is transmitted to the front side. It is preferable that it can be moved to.
  • the urging mechanism is configured to urge the wheel support member to the front side, the urging mechanism can be configured on a small scale, and the structure is simplified. Is advantageous.
  • the urging mechanism is configured to urge the wheel support member to the front side
  • the urging mechanism is attached to one of the guide member and the wheel support member in the interlocking mechanism.
  • An interlocking member that extends toward the other of the guide member and the wheel support member is provided, and a pressure receiving surface portion that is attached to the other of the guide member and the wheel support member and faces the interlocking member is provided. It is provided.
  • the guide member and the wheel support member can move in the front-rear direction without difficulty by the interlocking mechanism.
  • the guide member and the wheel support member can be moved in the front-rear direction by being swingably supported around the axis along the left-right direction of the airframe.
  • the guide member and the wheel support member move in the front-rear direction by swinging around the axis along the left-right direction of the airframe, the guide member and the wheel support member can move smoothly in the front-rear direction. ..
  • the guide member and the wheel support member can be moved in the front-rear direction by being swingably supported around an axis center along the left-right direction of the airframe by individual support shafts. Suitable.
  • the guide member and the wheel support member move in the front-rear direction by swinging around the axis along the left-right direction of the airframe, the guide member and the wheel support member can move smoothly in the front-rear direction. It becomes.
  • the guide member and the wheel support member are swayably supported around the axis along the left-right direction of the machine by individual support shafts, so that the guide member affects the swing of the wheel support member. Since it is less likely that the wheel support member affects the swing of the guide member, the guide member and the wheel support member can smoothly move in the front-rear direction in this respect as well.
  • the urging mechanism is a coil spring, and the coil spring is arranged so that the axis of the wheel support member passes through the inside of the coil spring.
  • the urging mechanism is a coil spring, and the urging force is generated by the twisting of the coil spring instead of the expansion and contraction of the coil spring.
  • the ground contact position of the wheel at the foremost position is the axis of the rotary tiller and the wheel support member in a state where the wheel is in contact with the ground in a side view. It is preferable that the wheel is located in front of the vertical line passing through the wheel.
  • the ground contact position of the wheel at the foremost position is relative to the vertical line passing through the rotary tiller and the shaft core when the wheel is in contact with the ground in a side view. Located on the front side, the wheels approach the rotary tiller.
  • the wheel support member When the wheel is positioned in the foremost position as described above, the wheel support member is in a backward tilted posture in which the upper end portion of the wheel support member is located rearward from the lower end portion of the wheel support member in a side view.
  • the wheel and the wheel support member receive almost the entire weight of the walking type management machine.
  • the operation of lifting the rotary tillage device can be easily performed.
  • the length from the ground contact position of the front wheel to the rear end of the steering wheel is sufficiently longer than the length from the ground contact position of the front wheel to the front end of the fuselage. The operation of lifting and moving the rotary tiller will be easier.
  • the guide member when the wheel is located at the final position of the front-rear movement, it is preferable that the guide member is in a forward leaning posture in which the upper end portion of the guide member is located on the front side with respect to the lower end portion of the guide member in a side view. Is.
  • the guide member is pushed to the rear side by the action of soil from the rotary tiller, and when the guide member moves to the rear side until the wheel moves to the final position of the front-back movement, the guide member is tilted forward. It becomes.
  • the guide member in the forward leaning posture facilitates the guidance of the soil from the rotary tillage device to the left and right outer sides and the lower side, so that the ridges are formed and the soil is stably gathered.
  • the walking type management machine is shown in FIGS. 1 to 9, and in FIGS. 1 to 9, F indicates a forward direction, B indicates a backward direction, U indicates an upward direction, and D indicates a downward direction. , R indicates the right direction, and L indicates the left direction.
  • the engine 2 (corresponding to the driving part) is supported on the upper part of the transmission case 1 (corresponding to the airframe), and the rotary tiller 3 is located below the engine 2.
  • the transmission handle 4, the guide member 5, the wheels 6, and the resistance member 7 are supported by the transmission case 1 and are supported by the rear portion of the transmission case 1 to form a walking type management machine.
  • the support frame 8 is connected to the front part of the transmission case 1 and extends to the front side, the engine 2 is supported by the support frame 8, and the engine 2 is supported by the transmission case 1 via the support frame 8.
  • the right and left tillage shafts 9 extend from the lower part of the transmission case 1 to the right and left sides, the tillage claws 10 are connected to the tillage shafts 9, and the cover 11 is above the tillage shafts 9 and the tillage claws 10. It is connected to the transmission case 1 so as to be located at.
  • the rotary tillage device 3 has a tillage shaft 9, a tiller claw 10, a cover 11, and the like.
  • the power of the engine 2 is transmitted to the input shaft 13 on the upper part of the transmission case 1 via the transmission belt 12, and is transmitted to the tillage shaft 9 via the transmission mechanism (not shown) inside the transmission case 1.
  • the tillage shaft 9 is rotationally driven in the counterclockwise direction of FIG. By rotationally driving the tilling shaft 9, tilling is performed by the tilling claw 10, and the work as described in (ridge forming work and soil gathering work) (cultivation work) described later is performed.
  • the support bracket 14 is connected to the rear portion of the transmission case 1, and the base portion of the steering handle 4 is attached to the support bracket 14.
  • the steering handle 4 is supported by the transmission case 1 via the support bracket 14, and extends rearward from the transmission case 1.
  • the support bracket 15 is connected to the support bracket 14, and the guide member 5 is attached to the support bracket 15.
  • the guide member 5 includes a support arm 16, a support plate 17, a guide plate 18, and the like.
  • the support arm 16 is formed by bending a plate material into a channel shape, and a vertically long opening 16a is opened in the central portion.
  • the support shaft 32 is attached to the support bracket 15 in the left-right direction, and the upper portion of the support arm 16 is swingably supported by the support shaft 32 around the axis P1 along the support bracket 15 in the left-right direction. It is supported so that it can swing in the front-back direction.
  • a relatively long support plate 17 is connected to the upper part of the support arm 16 in the left-right direction, and a relatively short support plate 17 is connected to the lower part of the support arm 16 in the left-right direction.
  • the guide plate 18 has a flat plate shape made of hard rubber, is formed in an inverted trapezoidal shape when viewed from the front, and is bolted to the support plate 17. In the guide plate 18, a vertically long opening 18a is opened at a position facing the opening 16a of the support arm 16.
  • the guide member 5 is supported by the transmission case 1 via the support brackets 14 and 15, and is arranged on the rear side with respect to the rotary tillage device 3 in a side view.
  • the guide member 5 is swingably supported around the axis P1 along the left-right direction of the transmission case 1 (support brackets 14 and 15), and is movable in the front-rear direction. Is supported by.
  • the support bracket 19 formed by bending the plate material is arranged on the rear side with respect to the guide member 5 in a side view.
  • the support bracket 19 is vertically swingably supported around the axis P3 along the left-right direction of the support bracket 15 over the ascending position UU (see FIGS. 3 and 7) and the descending position DD.
  • the pipe member 20 is connected to the support bracket 19.
  • the upper portion of the resistance member 7 formed of the round bar member is inserted into and connected to the pipe member 20, and the resistance member 7 extends through the openings 16a and 18a of the support arm 16 and the guide plate 18. There is.
  • the angle-shaped positioning member 21 is connected to the support bracket 15, and the positioning member 21 is opened with fixing holes 21a and 21b corresponding to the ascending position UU and the descending position DD. ing.
  • a fixing member 22 in which a round bar member is bent in an angle shape is slidably attached to a support bracket 19, and a spring 23 for urging the fixing member 22 toward the positioning member 21 is provided.
  • the support bracket 19 is operated to the lowering position DD, the fixing member 22 is inserted into the fixing hole 21a of the positioning member 21, and the support bracket 19 is fixed at the lowering position DD. Is.
  • the operator holds the handle portion 22a of the fixing member 22, and by pulling out the fixing member 22 from the fixing hole 21a of the positioning member 21, the support bracket 19 is lowered to the lowering position DD while holding the handle portion 22a of the fixing member 22. Can be operated to the ascending position UU shown in FIGS. 3 and 7. After that, the fixing member 22 is inserted into the fixing hole 21b of the positioning member 21, so that the support bracket 19 is fixed at the ascending position UU.
  • the operator holds the handle portion 22a of the fixing member 22 and pulls out the fixing member 22 from the fixing hole 21b of the positioning member 21 to remove the support bracket 19. It can be operated from the ascending position UU to the descending position DD and fixed at the descending position DD.
  • a wheel support member 24 formed by bending a plate material into a channel shape is provided.
  • a flat plate-shaped pressure receiving surface portion 24b connected to the wheel support member 24 over the right and left lateral side portions 24a, the right and left lateral side portions 24a, and a flat plate-shaped portion extending downward from the pressure receiving surface portion 24b.
  • a pressure receiving surface portion 24c is provided.
  • the round pipe-shaped axle portion 25 is connected to the lower part of the right and left lateral side portions 24a of the wheel support member 24 and extends to the right and left sides, and the right and left wheels 6 are the axles. It is freely rotatable and supported on the right and left portions of the portion 25.
  • the support shaft 26 is attached to the lower part of the support bracket 19 in the left-right direction.
  • the upper portion of the wheel support member 24 is swingably supported by the support shaft 26, and the wheel support member 24 is swingably supported around the axis P2 along the left-right direction of the support bracket 19. ..
  • the support shaft 32 (shaft core P1) is arranged on the front side with respect to the support shaft 26 (shaft core P2) in a side view. , Is arranged above the support shaft 26 (shaft core P2).
  • the wheel support member 24 is oscillatingly supported around the axis P2 along the left-right direction of the transmission case 1 (support brackets 14, 15, 19), and the support bracket 19 is in the lowered position DD.
  • the wheel support member 24 is supported by the transmission case 1 (support brackets 14, 15, 19) so as to be movable in the front-rear direction.
  • the wheel support member 24 is supported by the transmission case 1 via the support brackets 14, 15, and 19, so that the wheel 6 is attached to the guide member 5 in a side view while the support bracket 19 is fixed to the lowering position DD.
  • it is arranged on the rear side and is supported by the transmission case 1 so as to be movable in the front-rear direction.
  • the coil spring 27 (corresponding to the urging mechanism) is attached so as to be wound around the support shaft 26, and the support shaft 26 (shaft core P2) passes through the inside of the coil spring 27. It is in a state.
  • the lower end of the coil spring 27 is hung on the pressure receiving surface 24b of the wheel support member 24, and the upper end of the coil spring 27 is hung on the pin 28 attached to the support bracket 19, and the wheel is hung by the coil spring 27.
  • the support member 24 is urged to the front side.
  • the stopper member 29 is connected to the inner surface of the right and left lateral side portions 24a of the wheel support member 24.
  • the front portion and the rear portion of the lower portion of the support bracket 19 are formed obliquely, and the front stopper portion 19a and the rear stopper portion 19b are provided on the support bracket 19.
  • the wheel support member 24 and the wheel 6 are moved forward by the coil spring 27 and are located at the front position FM of the front-back movement, and the front portion of the stopper member 29 is located.
  • the wheel support member 24 and the wheel 6 are stopped at the front position FM by hitting the front stopper portion 19a of the support bracket 19 from below.
  • the wheel support member 24 and the wheel 6 move rearward from the front position FM against the coil spring 27, and the rear portion of the stopper member 29 is below the rear stopper portion 19b of the support bracket 19.
  • the wheel support member 24 and the wheel 6 are stopped at the final position BM of the front-rear movement by hitting from.
  • an interlocking mechanism 30 for integrally moving the guide member 5 and the wheel support member 24 in the front-rear direction is provided over the guide member 5 and the wheel support member 24.
  • the interlocking mechanism 30 has pressure receiving surface portions 24b and 24c of the wheel support member 24 (see the above-mentioned (configuration of the wheel and the wheel support member)), the interlocking member 31 and the like.
  • the interlocking member 31 has an elongated flat plate shape, is attached to a lower portion of the opening 16a in the support arm 16, passes between the support arm 16 and the right and left wheels 6, and is directed toward the wheel support member 24. Has been postponed.
  • the end portion 31a of the interlocking member 31 is formed so as to have a predetermined length L1 in a direction substantially orthogonal to the longitudinal direction (extending direction) of the interlocking member 31 in a side view.
  • the pressure-receiving surface portions 24b and 24c of the wheel support member 24 are provided on the wheel support member 24 so as to face the interlocking member 31, and the pressure-receiving surface portion 24c of the wheel support member 24 is slightly behind the pressure-receiving surface portion 24b of the wheel support member 24. It extends diagonally downward on the side.
  • the state shown in FIG. 5 is a state in which the wheel support member 24 is moved to the front position FM by the coil spring 27 in a state where the support bracket 19 is fixed to the lowering position DD, and the end 31a of the interlocking member 31 is the wheel support member. It is in a state of being in contact with the pressure receiving surface portion 24c of 24.
  • the interlocking member 31 and the pressure receiving surface portion 24c of the wheel supporting member 24 intersect in a state close to a right angle in a side view, and substantially the entire range of the length L1 at the end portion 31a of the interlocking member 31 is the wheel support. It is in a line contact state in contact with the pressure receiving surface portion 24c of the member 24.
  • the movement locus of the guide member 5 is caused by the difference between the position of the support shaft 32 (axle core P1) and the position of the support shaft 26 (shaft core P2). And the movement locus of the wheel support member 24 are different.
  • the end portion 31a of the interlocking member 31 reaches the pressure receiving surface portion 24b of the wheel support member 24.
  • the interlocking member 31 and the pressure receiving surface portion 24b of the wheel supporting member 24 intersect in a state close to a right angle in a side view, and substantially the entire range of the length L1 at the end portion 31a of the interlocking member 31 is the wheel support. It is in a line contact state in contact with the pressure receiving surface portion 24b of the member 24.
  • the difference between the movement locus of the guide member 5 and the movement locus of the wheel support member 24 causes the above-mentioned description (the state of movement of the guide member and the wheel support member to the rear side).
  • the end portion 31a of the interlocking member 31 moves so as to slide downward from the pressure receiving surface portion 24b of the wheel support member 24, and the difference in the movement locus between the guide member 5 and the wheel support member 524 is absorbed.
  • the movement of the wheel support member 24 to the front side is reasonably transmitted to the guide member.
  • the end portion 31a of the interlocking member 31 reaches the pressure receiving surface portion 24c of the wheel support member 24.
  • the interlocking member 31 and the pressure receiving surface portion 24c of the wheel support member 24 intersect in a state close to a right angle in a side view.
  • the interlocking member 31 and the pressure receiving surface portion 24b of the wheel support member 24 intersect in a state close to a right angle in a side view.
  • the front side where the guide member 5 and the wheel support member 24 approach the rotary tillage device 3 by the coil spring 27 and the interlocking mechanism 30.
  • the stopper member 29 hits the front stopper portion 19a of the support bracket 19, and the wheel support member 24 and the wheel 6 are stopped at the front position FM.
  • the ground contact position S1 of the wheel 6 at the front position FM is the support shaft of the wheel support member 24 with the rotary tiller 3 and the wheel 6 grounded in a side view. It is located on the front side with respect to the vertical line E1 passing through 26 (axis core P2).
  • the wheel support member 24 is in a backward tilted posture in which the upper end portion of the wheel support member 24 is located rearward from the lower end portion of the wheel support member 24 in a side view.
  • the length L3 from the ground contact position S1 of the wheel 6 of the front position FM to the rear end of the steering handle 4 is changed from the ground contact position S1 of the wheel 6 of the front position FM to the walking type management machine. It is longer than the length L2 to the front end of.
  • the operator can easily lift the rotary tillage device 3 by pushing down while holding the grip portion 4a at the rear end of the steering handle 4, and while holding the grip 4a at the rear end of the steering handle 4.
  • the walking type management machine can be moved by the wheels 6.
  • the length L4 from the support shaft 26 (shaft core P2) of the wheel support member 24 to the axle portion 25 on which the wheel 6 of the wheel support member 24 is supported is the upper end portion (support) of the guide member 5.
  • the length from the shaft 32 (axle core P1)) to the lower end (lower end of the guide plate 18) is set to be shorter than the length L5, and the wheel support member 24 (length L4) is relatively short. It has become. As a result, even if a bending moment based on the weight of the walking type management machine is applied to the wheel support member 24, the bending moment is suppressed due to the short wheel support member 24 (length L4), and the wheel support member 24 It is advantageous in terms of improving durability.
  • the rotary tilling device is used for ridge forming work in which the soil from the rotary tilling device 3 is guided to the left and right outside by the guide member 5 to form ridges, and while traveling between the ridges formed in the field.
  • the work as described below is performed.
  • the operator operates and fixes the support bracket 19 to the descending position DD to set the resistance member 7 forward, and walks while operating the rotary tillage device 3. Run the type management machine.
  • the guide member 5 moves to the rear side due to the action of soil from the rotary tillage device 3.
  • the interlocking mechanism 30 causes the wheel support member 24 to move rearward from the front position FM against the coil spring 27, and the guide member 5 and the wheel support member 24 move to the rear side away from the rotary tillage device 3. ..
  • the stopper member 29 hits the rear stopper portion 19b of the support bracket 19, so that the wheel support member 24 and the wheel 6 are stopped at the final position BM.
  • the guide member 5 When the wheel 6 is located at the final position BM, the guide member 5 is in a forward leaning posture in which the upper end portion of the guide member 5 is located forward with respect to the lower end portion of the guide member 5 in a side view.
  • the guide member 5 in the forward leaning posture facilitates the guidance of the soil from the rotary tillage device 3 to the left and right outer sides and the lower side, so that the ridges are formed and the soil is stably gathered.
  • the guide member 5 may not move to the rear side until the wheel support member 24 reaches the final position BM. In this state, the guide member 5 Is a little closer to an upright posture than the forward leaning posture of the guide member 5 in the state where the wheel support member 24 is stopped at the final position BM.
  • the operator operates and fixes the support bracket 19 to the ascending position UU, and sets the resistance member 7 downward.
  • the resistance member 7 is inserted into the opening 16a of the support arm 16, so that the guide member 5 is lifted by the resistance member 7.
  • the rotary tillage device 3 By operating the rotary tillage device 3 and running the walking type management machine, the rotary tillage device 3 cultivates the field while the resistance member 7 suppresses the advance of the walking type management machine.
  • the interlocking member 31 is attached to the wheel support member 24 and extends toward the guide member 5, and the pressure receiving surface portions 24b and 24c are attached to the guide member 5 and face the interlocking member 31. May be done.
  • the interlocking mechanism 30 is not configured to have a contact structure between the interlocking member 31 and the pressure receiving surface portions 24b and 24c, but is configured to be connected to the guide member 5 and the wheel support member 24.
  • the urging mechanism may be configured to urge the guide member 5 to the front side, and the urging mechanism may be configured to urge both the guide member 5 and the wheel support member 24 to the front side. May be done.
  • the guide member 5 and the wheel support member 24 are not swingably supported by different individual support shafts 32 (axle core P1) and support shaft 26 (shaft core P2), but are the same support shaft (axle core P2). ) It may be supported so as to be swingable around. According to this configuration, the above-mentioned (second alternative form of carrying out the invention) can be easily carried out.
  • the ground contact position S1 of the wheel 6 at the front position FM is the same support shaft (axis) as described above in a state where the rotary tiller 3 and the wheel 6 are grounded in a side view. It may be configured to be located on the front side with respect to the vertical straight line E1 passing through the core).
  • the guide member 5 and the wheel support member 24 are supported so as to be swingable around the same support shaft (axle core), they can swing in the front-rear direction around one support shaft (axle core).
  • the support plate 17 and the guide plate 18 of the guide member 5 and the wheel 6 are supported by the support member (not shown) supported by the wheel 6, and the support member is configured to be urged to the front side by the urging mechanism. It is good.
  • the support member has the function of the support arm 16 of the guide member 5, the function of the wheel support member 24, and the function of the interlocking mechanism 30.
  • the guide member 5 and the wheel support member 24 may not be supported so as to be swingable, but may be supported so as to be slidably movable along the front-rear direction.
  • An electric motor (not shown) may be provided as a driving unit instead of the engine 2.
  • the present invention can be applied to a walking type management machine that performs ridge forming work, soil gathering work, etc. in a field.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Zoology (AREA)
  • Soil Working Implements (AREA)
  • Power Engineering (AREA)
  • Agricultural Machines (AREA)

Abstract

This walking type cultivator is provided with: a guide member 5 which is disposed behind a rotary tilling device in a side view and is supported by a machine body so as to be movable in the front-rear direction; a wheel 6 disposed behind the guide member 5 in the side view; a wheel support member 24 for supporting the wheel 6 on the machine body movably in the front-rear direction; and a biasing mechanism 27 for integrally biasing the guide member 5 and the wheel support member 24 forward. The biasing member 27 enables the guide member 5 and the wheel support member 24 to move forward to approach the rotary tilling device, and the guide member 5 and the wheel support member 24 are also able to move backward away from the rotary tilling device against the biasing mechanism 27 due to the action of soil from the rotary tilling device.

Description

歩行型管理機Walking type management machine
　本発明は、歩行型管理機の案内部材及び車輪の構成に関する。 The present invention relates to a configuration of a guide member and wheels of a walking type management machine.
　歩行型管理機として、特許文献１に開示されているようなものがある。
　特許文献１では、ロータリ耕耘装置からの土を左右両外側に案内する案内部材が、ロータリ耕耘装置の後側に配置されて、前後方向に移動可能に機体に支持されている。車輪が案内部材の後側に配置されて、車輪を前後方向に移動可能に機体に支持する車輪支持部材が設けられており、案内部材と車輪支持部材とが、一体で前後方向に移動可能に構成されている。 As a walking type management machine, there is one as disclosed in Patent Document 1.
In Patent Document 1, guide members for guiding the soil from the rotary tillage device to the left and right outside are arranged behind the rotary tillage device and supported by the machine body so as to be movable in the front-rear direction. The wheels are arranged on the rear side of the guide member, and a wheel support member for supporting the wheels in the front-rear direction is provided, and the guide member and the wheel support member can be integrally moved in the front-rear direction. It is configured.
　畝形成作業や土寄せ作業を行う場合、作業者は、案内部材と車輪支持部材とを後側に移動させて機体に固定する。この状態でロータリ耕耘装置を駆動しながら機体を前進させると、ロータリ耕耘装置からの土が案内部材により左右両外側に案内される。 When performing ridge forming work or soil gathering work, the operator moves the guide member and the wheel support member to the rear side and fixes them to the machine body. When the machine body is advanced while driving the rotary tillage device in this state, the soil from the rotary tillage device is guided to the left and right outside by the guide member.
　歩行型管理機を移動させる場合、作業者は、ロータリ耕耘装置を停止させた状態で、案内部材と車輪支持部材とを前側に移動させて機体に固定する。この状態で、作業者は、操縦ハンドルを持ちながら押し下げることによって、車輪を接地させながらロータリ耕耘装置を持ち上げることができるのであり、路上等での移動を行うことができる。 When moving the walking type management machine, the operator moves the guide member and the wheel support member to the front side and fixes them to the machine body while the rotary tillage device is stopped. In this state, the operator can lift the rotary tillage device while keeping the wheels in contact with the ground by pushing down while holding the steering handle, and can move on the road or the like.
日本国特許第５７６０３４４号公報Japanese Patent No. 5760344
　特許文献１では、畝形成作業や土寄せ作業を行う場合、作業者は、案内部材と車輪支持部材とを、手動で後側に移動させて連結部材等により機体に固定する必要がある。
　同様に歩行型管理機を移動させる場合、作業者は、案内部材と車輪支持部材とを、手動で前側に移動させて連結部材等により機体に固定する必要があるので、作業性の面で改善の余地がある。 In Patent Document 1, when performing ridge forming work or soil gathering work, the operator needs to manually move the guide member and the wheel support member to the rear side and fix them to the machine body by a connecting member or the like.
Similarly, when moving the walking type management machine, the operator needs to manually move the guide member and the wheel support member to the front side and fix them to the machine body by a connecting member or the like, which improves workability. There is room for.
　本発明は、歩行型管理機において、案内部材と車輪支持部材とが前後方向に移動操作される際の作業性を向上させることを目的としている。 An object of the present invention is to improve workability when the guide member and the wheel support member are moved and operated in the front-rear direction in the walking type management machine.
　本発明の歩行型管理機は、機体に支持された原動部と、前記機体から後側に延出されるように前記機体に支持された操縦ハンドルと、前記原動部に対して下側に位置するように前記機体に支持されて、前記原動部の動力により駆動されるロータリ耕耘装置と、側面視で、前記ロータリ耕耘装置に対して後側に配置され、前後方向に移動可能に前記機体に支持されて、前記ロータリ耕耘装置からの土を左右両外側に案内する案内部材と、側面視で、前記案内部材に対して後側に配置された車輪と、前記車輪を前後方向に移動可能に、前記機体に支持する車輪支持部材と、前記案内部材と前記車輪支持部材とを一体的に前側に付勢する付勢機構とが備えられ、前記案内部材と前記車輪支持部材とは、前記付勢機構により前記ロータリ耕耘装置に接近する前側に移動可能であり、且つ、前記ロータリ耕耘装置からの土の作用により前記付勢機構に抗して前記ロータリ耕耘装置から離れる後側に移動可能である。 The walk-behind management machine of the present invention is located below the driving part supported by the machine, a steering handle supported by the machine so as to extend rearward from the machine, and the driving part. A rotary tiller that is supported by the aircraft and driven by the power of the driving unit, and a rotary tiller that is arranged on the rear side of the rotary tiller in a side view and is movable in the front-rear direction. The guide member for guiding the soil from the rotary tillage device to the left and right outside, the wheel arranged on the rear side with respect to the guide member in the side view, and the wheel so as to be movable in the front-rear direction. A wheel support member that supports the machine body and an urging mechanism that integrally urges the guide member and the wheel support member to the front side are provided, and the guide member and the wheel support member are urged. It is possible to move to the front side approaching the rotary tillage device by the mechanism, and to move to the rear side away from the rotary tillage device against the urging mechanism by the action of soil from the rotary tillage device.
　本発明によると、畝形成作業や土寄せ作業を行う場合、ロータリ耕耘装置を駆動しながら機体を前進させると、案内部材によりロータリ耕耘装置からの土が左右両外側に案内される。
　これと同時にロータリ耕耘装置からの土の作用により、案内部材が後側に押されて、案内部材と車輪支持部材とが一体で、付勢機構に抗してロータリ耕耘装置から離れる後側に移動するのであり、案内部材は、ロータリ耕耘装置からの土の案内によって適切な位置に配置されるようになる。 According to the present invention, when the ridge forming work and the soil gathering work are performed, when the machine body is advanced while driving the rotary tillage device, the soil from the rotary tillage device is guided to the left and right outside by the guide member.
At the same time, due to the action of soil from the rotary tiller, the guide member is pushed to the rear side, and the guide member and the wheel support member are integrated and move to the rear side away from the rotary tiller against the urging mechanism. The guide member will be placed in an appropriate position by the guidance of the soil from the rotary tiller.
　本発明によると、歩行型管理機を移動させる場合、ロータリ耕耘装置が停止操作されること等により、ロータリ耕耘装置からの土の作用が消えると、案内部材と車輪支持部材とが一体で、付勢機構によりロータリ耕耘装置に接近する前側に移動する。
　車輪支持部材が前側に移動し、車輪がロータリ耕耘装置に接近した状態において、作業者が、操縦ハンドルを持ちながら押し下げることにより、車輪を接地させながらロータリ耕耘装置を比較的楽に持ち上げることができるのであり、路上等での移動を行うことができる。 According to the present invention, when the walking type management machine is moved, when the action of soil from the rotary tillage device disappears due to the stop operation of the rotary tillage device or the like, the guide member and the wheel support member are integrally attached. It moves to the front side approaching the rotary tiller by the force mechanism.
With the wheel support member moving forward and the wheels approaching the rotary tiller, the operator can lift the rotary tiller relatively easily while holding the steering handle and pushing it down, while keeping the wheels in contact with the ground. Yes, it is possible to move on the road.
　以上のように、本発明によると、ロータリ耕耘装置からの土の作用の有無によって、案内部材と車輪支持部材とが前後方向に移動するのであり、作業者が案内部材と車輪支持部材とを、手動で前後方向に移動させて連結部材等により機体に固定する必要が無くなくなって、歩行型管理機の作業性が向上する。 As described above, according to the present invention, the guide member and the wheel support member move in the front-rear direction depending on the presence or absence of the action of soil from the rotary tiller, and the operator can move the guide member and the wheel support member together. It is no longer necessary to manually move it in the front-rear direction and fix it to the machine body by a connecting member or the like, which improves the workability of the walking type management machine.
　本発明において、前記案内部材と前記車輪支持部材とに亘って設けられて、前記案内部材と前記車輪支持部材とを一体的に前後方向に移動させる連動機構が備えられていると好適である。 In the present invention, it is preferable that the guide member and the wheel support member are provided with an interlocking mechanism for integrally moving the guide member and the wheel support member in the front-rear direction.
　本発明によると、案内部材と車輪支持部材とが、連動機構により安定して一体で前後方向に移動できるようになる。 According to the present invention, the guide member and the wheel support member can be stably and integrally moved in the front-rear direction by the interlocking mechanism.
　本発明において、前記付勢機構は、前記車輪支持部材を前側に付勢し、前記連動機構に、前記案内部材と前記車輪支持部材とのうちの一方に取り付けられて前記案内部材と前記車輪支持部材とのうちの他方に向けて延出された連動部材と、前記案内部材と前記車輪支持部材とのうちの他方に取り付けられて前記連動部材に向いた受圧面部とが設けられ、前記ロータリ耕耘装置からの土の作用による前記案内部材の後側への移動が、前記連動部材と前記受圧面部との接触により前記車輪支持部材に伝達されて、前記付勢機構に抗して、前記車輪支持部材が後側に移動可能であり、前記付勢機構による前記車輪支持部材の前側への移動が、前記連動部材と前記受圧面部との接触により前記案内部材に伝達されて、前記案内部材が前側に移動可能であると好適である。 In the present invention, the urging mechanism urges the wheel support member to the front side and is attached to the interlocking mechanism to one of the guide member and the wheel support member to support the guide member and the wheel support. An interlocking member extending toward the other of the members and a pressure receiving surface portion attached to the other of the guide member and the wheel support member and facing the interlocking member are provided, and the rotary tillage is provided. The movement of the guide member to the rear side due to the action of soil from the device is transmitted to the wheel support member by the contact between the interlocking member and the pressure receiving surface portion, and the wheel support is opposed to the urging mechanism. The member is movable to the rear side, and the movement of the wheel support member by the urging mechanism to the front side is transmitted to the guide member by contact between the interlocking member and the pressure receiving surface portion, and the guide member is transmitted to the front side. It is preferable that it can be moved to.
　本発明によると、付勢機構は、車輪支持部材を前側に付勢するように構成されているので、付勢機構は小規模なものに構成されることが可能となり、構造の簡素化の面で有利である。 According to the present invention, since the urging mechanism is configured to urge the wheel support member to the front side, the urging mechanism can be configured on a small scale, and the structure is simplified. Is advantageous.
　前述のように、付勢機構が車輪支持部材を前側に付勢するように構成された場合、本発明によると、連動機構において、案内部材と車輪支持部材とのうちの一方に取り付けられて、案内部材と車輪支持部材とのうちの他方に向けて延出された連動部材が設けられており、案内部材と車輪支持部材とのうちの他方に取り付けられて、連動部材に向いた受圧面部が設けられている。 As described above, when the urging mechanism is configured to urge the wheel support member to the front side, according to the present invention, the urging mechanism is attached to one of the guide member and the wheel support member in the interlocking mechanism. An interlocking member that extends toward the other of the guide member and the wheel support member is provided, and a pressure receiving surface portion that is attached to the other of the guide member and the wheel support member and faces the interlocking member is provided. It is provided.
　これによって、案内部材がロータリ耕耘装置からの土の作用により後側に移動すると、連動部材と受圧面部との接触により、案内部材の後側への移動が車輪支持部材に伝達されて、車輪支持部材が後側に移動する。車輪支持部材が付勢機構により前側に移動すると、連動部材と受圧面部との接触により、車輪支持部材の前側への移動が案内部材に伝達されて、案内部材が前側に移動する。 As a result, when the guide member moves to the rear side due to the action of soil from the rotary tiller, the movement to the rear side of the guide member is transmitted to the wheel support member by the contact between the interlocking member and the pressure receiving surface portion, and the wheel support The member moves to the rear side. When the wheel support member moves to the front side by the urging mechanism, the movement of the wheel support member to the front side is transmitted to the guide member by the contact between the interlocking member and the pressure receiving surface portion, and the guide member moves to the front side.
　以上のように、本発明によると、付勢機構が車輪支持部材を前側に付勢するように構成された場合、連動機構により、案内部材と車輪支持部材とが無理なく前後方向に移動可能となる。 As described above, according to the present invention, when the urging mechanism is configured to urge the wheel support member to the front side, the guide member and the wheel support member can move in the front-rear direction without difficulty by the interlocking mechanism. Become.
　本発明において、前記案内部材及び前記車輪支持部材が、前記機体の左右方向に沿った軸芯周りに揺動可能に支持されることにより、前後方向に移動可能であると好適である。 In the present invention, it is preferable that the guide member and the wheel support member can be moved in the front-rear direction by being swingably supported around the axis along the left-right direction of the airframe.
　本発明によると、案内部材及び車輪支持部材が、機体の左右方向に沿った軸芯周りの揺動によって前後方向に移動するので、案内部材及び車輪支持部材が滑らかに前後方向に移動可能となる。 According to the present invention, since the guide member and the wheel support member move in the front-rear direction by swinging around the axis along the left-right direction of the airframe, the guide member and the wheel support member can move smoothly in the front-rear direction. ..
　本発明において、前記案内部材と前記車輪支持部材とが、個別の支軸により前記機体の左右方向に沿った軸芯周りに揺動可能に支持されることにより、前後方向に移動可能であると好適である。 In the present invention, the guide member and the wheel support member can be moved in the front-rear direction by being swingably supported around an axis center along the left-right direction of the airframe by individual support shafts. Suitable.
　本発明によると、案内部材と車輪支持部材とが、機体の左右方向に沿った軸芯周りの揺動によって前後方向に移動するので、案内部材と車輪支持部材とが滑らかに前後方向に移動可能となる。 According to the present invention, since the guide member and the wheel support member move in the front-rear direction by swinging around the axis along the left-right direction of the airframe, the guide member and the wheel support member can move smoothly in the front-rear direction. It becomes.
　この場合、案内部材と車輪支持部材とが、個別の支軸により機体の左右方向に沿った軸芯周りに揺動可能に支持されることにより、案内部材が車輪支持部材の揺動に影響を及ぼしたり、車輪支持部材が案内部材の揺動に影響を及ぼしたりすることが少なくなるので、この点においても、案内部材と車輪支持部材とが滑らかに前後方向に移動可能となる。 In this case, the guide member and the wheel support member are swayably supported around the axis along the left-right direction of the machine by individual support shafts, so that the guide member affects the swing of the wheel support member. Since it is less likely that the wheel support member affects the swing of the guide member, the guide member and the wheel support member can smoothly move in the front-rear direction in this respect as well.
　本発明において、前記付勢機構がコイルバネであり、前記コイルバネの内部を前記車輪支持部材の軸芯が通るように、前記コイルバネが配置されていると好適である。 In the present invention, it is preferable that the urging mechanism is a coil spring, and the coil spring is arranged so that the axis of the wheel support member passes through the inside of the coil spring.
　本発明によると、付勢機構がコイルバネであり、コイルバネの伸縮ではなく、コイルバネの捩じりにより付勢力が発生するので、コイルバネに隙間が発生し難く、コイルバネに土が挟み込まれ難い。 According to the present invention, the urging mechanism is a coil spring, and the urging force is generated by the twisting of the coil spring instead of the expansion and contraction of the coil spring.
　本発明において、前記車輪が前後移動の最前位置に位置すると、前記最前位置の前記車輪の接地位置が、側面視で前記ロータリ耕耘装置及び前記車輪が接地した状態での前記車輪支持部材の軸芯を通る鉛直線に対して、前側に位置すると好適である。 In the present invention, when the wheel is located at the foremost position of the front-rear movement, the ground contact position of the wheel at the foremost position is the axis of the rotary tiller and the wheel support member in a state where the wheel is in contact with the ground in a side view. It is preferable that the wheel is located in front of the vertical line passing through the wheel.
　本発明によると、車輪が前後移動の最前位置に位置すれば、最前位置の車輪の接地位置が、側面視でロータリ耕耘装置及び車輪が接地した状態での軸芯を通る鉛直線に対して、前側に位置して、車輪がロータリ耕耘装置に接近する。 According to the present invention, if the wheel is located at the foremost position of the front-back movement, the ground contact position of the wheel at the foremost position is relative to the vertical line passing through the rotary tiller and the shaft core when the wheel is in contact with the ground in a side view. Located on the front side, the wheels approach the rotary tiller.
　前述のように車輪が最前位置に位置した場合、車輪支持部材が、側面視で車輪支持部材の上端部が車輪支持部材の下端部よりも後側に位置する後傾姿勢となる。この状態で作業者が操縦ハンドルの後端部を持ちながら押し下げてロータリ耕耘装置を持ち上げようとすると、歩行型管理機の略全重量が車輪及び車輪支持部材に掛かる。この時、車輪支持部材の支軸を支点に後方への力のモーメントが生じるため、ロータリ耕耘装置を持ち上げる操作が楽に行われるようになる。
　また、最前位置の車輪の接地位置から機体の前端部までの長さに比べて、最前位置の車輪の接地位置から操縦ハンドルの後端部までの長さが、十分に長いものとなるので、ロータリ耕耘装置を持ち上げて移動させる操作が楽に行われるようになる。 When the wheel is positioned in the foremost position as described above, the wheel support member is in a backward tilted posture in which the upper end portion of the wheel support member is located rearward from the lower end portion of the wheel support member in a side view. In this state, when the operator tries to lift the rotary tiller while holding the rear end of the steering handle, the wheel and the wheel support member receive almost the entire weight of the walking type management machine. At this time, since a moment of force is generated backward with the support shaft of the wheel support member as a fulcrum, the operation of lifting the rotary tillage device can be easily performed.
In addition, the length from the ground contact position of the front wheel to the rear end of the steering wheel is sufficiently longer than the length from the ground contact position of the front wheel to the front end of the fuselage. The operation of lifting and moving the rotary tiller will be easier.
　本発明において、前記車輪が前後移動の最後位置に位置すると、前記案内部材が、側面視で前記案内部材の上端部が前記案内部材の下端部に対して前側に位置する前傾姿勢となると好適である。 In the present invention, when the wheel is located at the final position of the front-rear movement, it is preferable that the guide member is in a forward leaning posture in which the upper end portion of the guide member is located on the front side with respect to the lower end portion of the guide member in a side view. Is.
　本発明によると、ロータリ耕耘装置からの土の作用により、案内部材が後側に押され、車輪が前後移動の最後位置に移動するまで案内部材が後側に移動すると、案内部材が前傾姿勢となる。
　前傾姿勢の案内部材により、ロータリ耕耘装置からの土が左右両外側及び下側に案内され易くなるのであり、畝の形成や土寄せが安定して行われるようになる。 According to the present invention, the guide member is pushed to the rear side by the action of soil from the rotary tiller, and when the guide member moves to the rear side until the wheel moves to the final position of the front-back movement, the guide member is tilted forward. It becomes.
The guide member in the forward leaning posture facilitates the guidance of the soil from the rotary tillage device to the left and right outer sides and the lower side, so that the ridges are formed and the soil is stably gathered.
移動時において、支持ブラケットが下降位置に固定され、車輪支持部材及び車輪が最前位置に位置した状態での歩行型管理機の左側面図である。It is a left side view of the walking type management machine in a state where the support bracket is fixed in the lowered position, and the wheel support member and the wheel are in the front position at the time of movement. 畝形成作業及び土寄せ作業において、支持ブラケットが下降位置に固定され、車輪支持部材及び車輪が最後位置に位置した状態での歩行型管理機の左側面図である。It is a left side view of the walking type management machine in a state where a support bracket is fixed in a descending position, and a wheel support member and a wheel are in the last position in a ridge forming work and a soil gathering work. 耕耘作業において、支持ブラケットが上昇位置に固定され状態での歩行型管理機の左側面図である。It is a left side view of the walking type management machine in a state where the support bracket is fixed in the raised position in the tilling work. 耕耘作業において、支持ブラケットが上昇位置に固定され状態での歩行型管理機の平面図である。It is a top view of the walking type management machine in a state where the support bracket is fixed in the raised position in the tilling work. 支持ブラケットが下降位置に固定され、車輪支持部材及び車輪が最前位置に位置した状態を示す案内部材及び車輪支持部材の付近の左側面図である。It is a left side view of the vicinity of the guide member and the wheel support member which shows the state which the support bracket is fixed in the lowered position, and the wheel support member and a wheel are in the front position. 支持ブラケットが下降位置に固定され、車輪支持部材及び車輪が最後位置に位置した状態を示す案内部材及び車輪支持部材の付近の左側面図である。It is a left side view in the vicinity of the guide member and the wheel support member which shows the state which the support bracket is fixed in the lowered position, and the wheel support member and a wheel are in the last position. 支持ブラケットが上昇位置に固定された状態を示す案内部材及び車輪支持部材の付近の左側面図である。It is a left side view in the vicinity of the guide member and the wheel support member which shows the state which the support bracket is fixed in the raised position. 支持ブラケットが下降位置に固定され、車輪支持部材及び車輪が最前位置に位置した状態を示す案内部材及び車輪支持部材の付近の斜視図である。It is a perspective view of the vicinity of the guide member and the wheel support member which shows the state which the support bracket is fixed in the lowered position, and the wheel support member and a wheel are in the front position. 支持ブラケットが下降位置に固定され、車輪支持部材及び車輪が最前位置に位置した状態を示す案内部材及び車輪支持部材の付近の斜視図である。It is a perspective view of the vicinity of the guide member and the wheel support member which shows the state which the support bracket is fixed in the lowered position, and the wheel support member and a wheel are in the front position.
　図１～図９に歩行型管理機が示されており、図１～図９において、Ｆは前方向を示し、Ｂは後方向を示し、Ｕは上方向を示し、Ｄは下方向を示し、Ｒは右方向を示し、Ｌは左方向を示している。 The walking type management machine is shown in FIGS. 1 to 9, and in FIGS. 1 to 9, F indicates a forward direction, B indicates a backward direction, U indicates an upward direction, and D indicates a downward direction. , R indicates the right direction, and L indicates the left direction.
（歩行型管理機の全体構成）
　図１及び図４に示すように、伝動ケース１（機体に相当）の上部に、エンジン２（原動部に相当）が支持されて、ロータリ耕耘装置３がエンジン２に対して下側に位置するように伝動ケース１に支持されており、操縦ハンドル４、案内部材５、車輪６及び抵抗部材７が、伝動ケース１の後部に支持されて、歩行型管理機が構成されている。 (Overall configuration of walking management machine)
As shown in FIGS. 1 and 4, the engine 2 (corresponding to the driving part) is supported on the upper part of the transmission case 1 (corresponding to the airframe), and the rotary tiller 3 is located below the engine 2. As described above, the transmission handle 4, the guide member 5, the wheels 6, and the resistance member 7 are supported by the transmission case 1 and are supported by the rear portion of the transmission case 1 to form a walking type management machine.
　支持フレーム８が伝動ケース１の前部に連結され前側に延出されて、エンジン２が支持フレーム８に支持されており、エンジン２は支持フレーム８を介して伝動ケース１に支持されている。 The support frame 8 is connected to the front part of the transmission case 1 and extends to the front side, the engine 2 is supported by the support frame 8, and the engine 2 is supported by the transmission case 1 via the support frame 8.
　右及び左の耕耘軸９が、伝動ケース１の下部から右側及び左側に延出されて、耕耘爪１０が耕耘軸９に連結されており、カバー１１が、耕耘軸９及び耕耘爪１０の上側に位置するように、伝動ケース１に連結されている。
　以上のように、ロータリ耕耘装置３は、耕耘軸９及び耕耘爪１０、カバー１１等を有している。 The right and left tillage shafts 9 extend from the lower part of the transmission case 1 to the right and left sides, the tillage claws 10 are connected to the tillage shafts 9, and the cover 11 is above the tillage shafts 9 and the tillage claws 10. It is connected to the transmission case 1 so as to be located at.
As described above, the rotary tillage device 3 has a tillage shaft 9, a tiller claw 10, a cover 11, and the like.
　エンジン２の動力が、伝動ベルト１２を介して伝動ケース１の上部の入力軸１３に伝達され、伝動ケース１の内部の伝動機構（図示せず）を介して、耕耘軸９に伝達されて、耕耘軸９が図１の反時計方向に回転駆動される。
　耕耘軸９が回転駆動されることにより、耕耘爪１０により耕耘が行われるのであり、後述の（畝形成作業及び土寄せ作業）（耕耘作業）に記載のような作業が行われる。 The power of the engine 2 is transmitted to the input shaft 13 on the upper part of the transmission case 1 via the transmission belt 12, and is transmitted to the tillage shaft 9 via the transmission mechanism (not shown) inside the transmission case 1. The tillage shaft 9 is rotationally driven in the counterclockwise direction of FIG.
By rotationally driving the tilling shaft 9, tilling is performed by the tilling claw 10, and the work as described in (ridge forming work and soil gathering work) (cultivation work) described later is performed.
（操縦ハンドル及び案内部材の構成）
　図１及び図４に示すように、支持ブラケット１４が、伝動ケース１の後部に連結されており、操縦ハンドル４の基部が支持ブラケット１４に取り付けられている。操縦ハンドル４が、支持ブラケット１４を介して伝動ケース１に支持されており、伝動ケース１から後側に延出されている。 (Structure of steering wheel and guide member)
As shown in FIGS. 1 and 4, the support bracket 14 is connected to the rear portion of the transmission case 1, and the base portion of the steering handle 4 is attached to the support bracket 14. The steering handle 4 is supported by the transmission case 1 via the support bracket 14, and extends rearward from the transmission case 1.
　図１，４，５に示すように、支持ブラケット１４に支持ブラケット１５が連結されており、案内部材５が支持ブラケット１５に取り付けられている。図４，５，８，９に示すように、案内部材５は、支持アーム１６及び支持板１７、案内板１８等を有している。 As shown in FIGS. 1, 4 and 5, the support bracket 15 is connected to the support bracket 14, and the guide member 5 is attached to the support bracket 15. As shown in FIGS. 4, 5, 8 and 9, the guide member 5 includes a support arm 16, a support plate 17, a guide plate 18, and the like.
　支持アーム１６は、板材がチャンネル状に折り曲げられて形成されて、中央部に縦長の開口部１６ａが開口されている。支軸３２が、支持ブラケット１５に左右方向に取り付けられており、支持アーム１６の上部が、支軸３２に揺動可能に支持されて、支持ブラケット１５の左右方向に沿った軸芯Ｐ１周りに前後方向に揺動可能に支持されている。 The support arm 16 is formed by bending a plate material into a channel shape, and a vertically long opening 16a is opened in the central portion. The support shaft 32 is attached to the support bracket 15 in the left-right direction, and the upper portion of the support arm 16 is swingably supported by the support shaft 32 around the axis P1 along the support bracket 15 in the left-right direction. It is supported so that it can swing in the front-back direction.
　比較的長い支持板１７が、支持アーム１６の上部に左右方向に沿って連結され、比較的短い支持板１７が、支持アーム１６の下部に左右方向に沿って連結されている。案内板１８は、硬質ゴムによる平板状で、正面視で逆台形状に形成されており、支持板１７にボルト連結されている。案内板１８において、支持アーム１６の開口部１６ａに対向する位置に、縦長の開口部１８ａが開口されている。 A relatively long support plate 17 is connected to the upper part of the support arm 16 in the left-right direction, and a relatively short support plate 17 is connected to the lower part of the support arm 16 in the left-right direction. The guide plate 18 has a flat plate shape made of hard rubber, is formed in an inverted trapezoidal shape when viewed from the front, and is bolted to the support plate 17. In the guide plate 18, a vertically long opening 18a is opened at a position facing the opening 16a of the support arm 16.
　以上のように、案内部材５が、支持ブラケット１４，１５を介して伝動ケース１に支持されており、側面視でロータリ耕耘装置３に対して後側に配置されている。
　案内部材５が、伝動ケース１（支持ブラケット１４，１５）の左右方向に沿った軸芯Ｐ１周りに揺動可能に支持されて、前後方向に移動可能に伝動ケース１（支持ブラケット１４，１５）に支持されている。 As described above, the guide member 5 is supported by the transmission case 1 via the support brackets 14 and 15, and is arranged on the rear side with respect to the rotary tillage device 3 in a side view.
The guide member 5 is swingably supported around the axis P1 along the left-right direction of the transmission case 1 (support brackets 14 and 15), and is movable in the front-rear direction. Is supported by.
（抵抗部材の構成）
　図１，４，５，８，９に示すように、板材が折り曲げられて形成された支持ブラケット１９が、側面視で案内部材５に対して後側に配置されている。支持ブラケット１９は、上昇位置ＵＵ（図３及び図７参照）及び下降位置ＤＤに亘って、支持ブラケット１５の左右方向に沿った軸芯Ｐ３周りに上下方向に揺動可能に支持されている。 (Structure of resistance member)
As shown in FIGS. 1, 4, 5, 8 and 9, the support bracket 19 formed by bending the plate material is arranged on the rear side with respect to the guide member 5 in a side view. The support bracket 19 is vertically swingably supported around the axis P3 along the left-right direction of the support bracket 15 over the ascending position UU (see FIGS. 3 and 7) and the descending position DD.
　パイプ部材２０が支持ブラケット１９に連結されている。丸棒材によって形成された抵抗部材７の上部が、パイプ部材２０に挿入されて連結されており、抵抗部材７が支持アーム１６及び案内板１８の開口部１６ａ，１８ａを通って延出されている。 The pipe member 20 is connected to the support bracket 19. The upper portion of the resistance member 7 formed of the round bar member is inserted into and connected to the pipe member 20, and the resistance member 7 extends through the openings 16a and 18a of the support arm 16 and the guide plate 18. There is.
　図５，８，９に示すように、アングル状の位置決め部材２１が支持ブラケット１５に連結されており、位置決め部材２１に、上昇位置ＵＵ及び下降位置ＤＤに対応する固定孔２１ａ，２１ｂが開口されている。 As shown in FIGS. 5, 8 and 9, the angle-shaped positioning member 21 is connected to the support bracket 15, and the positioning member 21 is opened with fixing holes 21a and 21b corresponding to the ascending position UU and the descending position DD. ing.
　丸棒材がアングル状に曲げられた固定部材２２が、支持ブラケット１９にスライド可能に取り付けられており、固定部材２２を位置決め部材２１側に付勢するバネ２３が、設けられている。 A fixing member 22 in which a round bar member is bent in an angle shape is slidably attached to a support bracket 19, and a spring 23 for urging the fixing member 22 toward the positioning member 21 is provided.
　図５，８，９に示す状態は、支持ブラケット１９が下降位置ＤＤに操作され、固定部材２２が位置決め部材２１の固定孔２１ａに挿入されて、支持ブラケット１９が下降位置ＤＤで固定された状態である。 In the states shown in FIGS. 5, 8 and 9, the support bracket 19 is operated to the lowering position DD, the fixing member 22 is inserted into the fixing hole 21a of the positioning member 21, and the support bracket 19 is fixed at the lowering position DD. Is.
　作業者は、固定部材２２の持ち手部２２ａを持ち、固定部材２２を位置決め部材２１の固定孔２１ａから抜くことにより、固定部材２２の持ち手部２２ａを持ちながら支持ブラケット１９を、下降位置ＤＤから図３及び図７に示す上昇位置ＵＵに操作することができる。この後、固定部材２２が位置決め部材２１の固定孔２１ｂに挿入されることにより、支持ブラケット１９が上昇位置ＵＵで固定される。 The operator holds the handle portion 22a of the fixing member 22, and by pulling out the fixing member 22 from the fixing hole 21a of the positioning member 21, the support bracket 19 is lowered to the lowering position DD while holding the handle portion 22a of the fixing member 22. Can be operated to the ascending position UU shown in FIGS. 3 and 7. After that, the fixing member 22 is inserted into the fixing hole 21b of the positioning member 21, so that the support bracket 19 is fixed at the ascending position UU.
　支持ブラケット１９が上昇位置ＵＵで固定された状態において、作業者は、固定部材２２の持ち手部２２ａを持って、固定部材２２を位置決め部材２１の固定孔２１ｂから抜くことにより、支持ブラケット１９を上昇位置ＵＵから下降位置ＤＤに操作し、下降位置ＤＤで固定することができる。 In a state where the support bracket 19 is fixed at the raised position UU, the operator holds the handle portion 22a of the fixing member 22 and pulls out the fixing member 22 from the fixing hole 21b of the positioning member 21 to remove the support bracket 19. It can be operated from the ascending position UU to the descending position DD and fixed at the descending position DD.
（車輪及び車輪支持部材の構成）
　図５，８，９に示すように、板材がチャンネル状に折り曲げられて形成された車輪支持部材２４が設けられている。車輪支持部材２４に、右及び左の横側部２４ａ、右及び左の横側部２４ａに亘って接続された平板状の受圧面部２４ｂ、受圧面部２４ｂから下側に延出された平板状の受圧面部２４ｃが設けられている。 (Structure of wheels and wheel support members)
As shown in FIGS. 5, 8 and 9, a wheel support member 24 formed by bending a plate material into a channel shape is provided. A flat plate-shaped pressure receiving surface portion 24b connected to the wheel support member 24 over the right and left lateral side portions 24a, the right and left lateral side portions 24a, and a flat plate-shaped portion extending downward from the pressure receiving surface portion 24b. A pressure receiving surface portion 24c is provided.
　丸パイプ状の車軸部２５が、車輪支持部材２４の右及び左の横側部２４ａの下部に亘って連結されて、右側及び左側に延出されており、右及び左の車輪６が、車軸部２５の右部及び左部に自由回転可能に支持されている。 The round pipe-shaped axle portion 25 is connected to the lower part of the right and left lateral side portions 24a of the wheel support member 24 and extends to the right and left sides, and the right and left wheels 6 are the axles. It is freely rotatable and supported on the right and left portions of the portion 25.
　支軸２６が、支持ブラケット１９の下部に左右方向に取り付けられている。車輪支持部材２４の上部が支軸２６に揺動可能に支持されて、車輪支持部材２４が、支持ブラケット１９の左右方向に沿った軸芯Ｐ２周りに前後方向に揺動可能に支持されている。 The support shaft 26 is attached to the lower part of the support bracket 19 in the left-right direction. The upper portion of the wheel support member 24 is swingably supported by the support shaft 26, and the wheel support member 24 is swingably supported around the axis P2 along the left-right direction of the support bracket 19. ..
　図５に示すように、支持ブラケット１９が下降位置ＤＤに固定された状態において、側面視で、支軸３２（軸芯Ｐ１）が、支軸２６（軸芯Ｐ２）に対して前側に配置され、支軸２６（軸芯Ｐ２）に対して上側に配置されている。 As shown in FIG. 5, in a state where the support bracket 19 is fixed to the descending position DD, the support shaft 32 (shaft core P1) is arranged on the front side with respect to the support shaft 26 (shaft core P2) in a side view. , Is arranged above the support shaft 26 (shaft core P2).
　以上のように、車輪支持部材２４は、伝動ケース１（支持ブラケット１４，１５，１９）の左右方向に沿った軸芯Ｐ２周りに揺動可能に支持されており、支持ブラケット１９が下降位置ＤＤに固定された状態で、車輪支持部材２４は、前後方向に移動可能に伝動ケース１（支持ブラケット１４，１５，１９）に支持されている。 As described above, the wheel support member 24 is oscillatingly supported around the axis P2 along the left-right direction of the transmission case 1 ( support brackets 14, 15, 19), and the support bracket 19 is in the lowered position DD. The wheel support member 24 is supported by the transmission case 1 ( support brackets 14, 15, 19) so as to be movable in the front-rear direction.
　車輪支持部材２４が支持ブラケット１４，１５，１９を介して伝動ケース１に支持されることにより、支持ブラケット１９が下降位置ＤＤに固定された状態で、車輪６は、側面視で案内部材５に対して後側に配置されており、前後方向に移動可能に伝動ケース１に支持されている。 The wheel support member 24 is supported by the transmission case 1 via the support brackets 14, 15, and 19, so that the wheel 6 is attached to the guide member 5 in a side view while the support bracket 19 is fixed to the lowering position DD. On the other hand, it is arranged on the rear side and is supported by the transmission case 1 so as to be movable in the front-rear direction.
（車輪支持部材を前側に付勢する構成）
　図５，８，９に示すように、コイルバネ２７（付勢機構に相当）が、支軸２６に巻き付けられるように取り付けられており、支軸２６（軸芯Ｐ２）がコイルバネ２７の内部を通る状態となっている。 (Structure that urges the wheel support member to the front side)
As shown in FIGS. 5, 8 and 9, the coil spring 27 (corresponding to the urging mechanism) is attached so as to be wound around the support shaft 26, and the support shaft 26 (shaft core P2) passes through the inside of the coil spring 27. It is in a state.
　コイルバネ２７の下側の端部が、車輪支持部材２４の受圧面部２４ｂに掛けられ、コイルバネ２７の上側の端部が、支持ブラケット１９に取り付けられたピン２８に掛けられており、コイルバネ２７によって車輪支持部材２４が前側に付勢されている。 The lower end of the coil spring 27 is hung on the pressure receiving surface 24b of the wheel support member 24, and the upper end of the coil spring 27 is hung on the pin 28 attached to the support bracket 19, and the wheel is hung by the coil spring 27. The support member 24 is urged to the front side.
　ストッパー部材２９が、車輪支持部材２４の右及び左の横側部２４ａの内面に連結されている。支持ブラケット１９の下部の前部及び後部が斜めに形成されて、前ストッパー部１９ａ及び後ストッパー部１９ｂが、支持ブラケット１９に設けられている。 The stopper member 29 is connected to the inner surface of the right and left lateral side portions 24a of the wheel support member 24. The front portion and the rear portion of the lower portion of the support bracket 19 are formed obliquely, and the front stopper portion 19a and the rear stopper portion 19b are provided on the support bracket 19.
　図５，８，９に示す状態は、車輪支持部材２４及び車輪６が、コイルバネ２７により前側に移動して、前後移動の最前位置ＦＭに位置した状態であり、ストッパー部材２９の前部が、支持ブラケット１９の前ストッパー部１９ａに下側から当たることによって、車輪支持部材２４及び車輪６が最前位置ＦＭで止められている。 In the states shown in FIGS. 5, 8 and 9, the wheel support member 24 and the wheel 6 are moved forward by the coil spring 27 and are located at the front position FM of the front-back movement, and the front portion of the stopper member 29 is located. The wheel support member 24 and the wheel 6 are stopped at the front position FM by hitting the front stopper portion 19a of the support bracket 19 from below.
　図６に示すように、車輪支持部材２４及び車輪６が、最前位置ＦＭからコイルバネ２７に抗して後側に移動し、ストッパー部材２９の後部が、支持ブラケット１９の後ストッパー部１９ｂに下側から当たることによって、車輪支持部材２４及び車輪６が、前後移動の最後位置ＢＭで止められる。 As shown in FIG. 6, the wheel support member 24 and the wheel 6 move rearward from the front position FM against the coil spring 27, and the rear portion of the stopper member 29 is below the rear stopper portion 19b of the support bracket 19. The wheel support member 24 and the wheel 6 are stopped at the final position BM of the front-rear movement by hitting from.
（連動機構の構成）
　図５及び図６に示すように、案内部材５と車輪支持部材２４とを一体的に前後方向に移動させる連動機構３０が、案内部材５と車輪支持部材２４と亘って設けられている。連動機構３０は、車輪支持部材２４の受圧面部２４ｂ，２４ｃ（前述の（車輪及び車輪支持部材の構成）参照）、及び、連動部材３１等を有している。 (Structure of interlocking mechanism)
As shown in FIGS. 5 and 6, an interlocking mechanism 30 for integrally moving the guide member 5 and the wheel support member 24 in the front-rear direction is provided over the guide member 5 and the wheel support member 24. The interlocking mechanism 30 has pressure receiving surface portions 24b and 24c of the wheel support member 24 (see the above-mentioned (configuration of the wheel and the wheel support member)), the interlocking member 31 and the like.
　連動部材３１は、細長い平板状であり、支持アーム１６における開口部１６ａの下側の部分に取り付けられて、支持アーム１６から右及び左の車輪６の間を通って、車輪支持部材２４に向けて延出されている。連動部材３１の端部３１ａは、側面視で、連動部材３１の長手方向（延出方向）と略直交する方向に所定の長さＬ１を有するように形成されている。 The interlocking member 31 has an elongated flat plate shape, is attached to a lower portion of the opening 16a in the support arm 16, passes between the support arm 16 and the right and left wheels 6, and is directed toward the wheel support member 24. Has been postponed. The end portion 31a of the interlocking member 31 is formed so as to have a predetermined length L1 in a direction substantially orthogonal to the longitudinal direction (extending direction) of the interlocking member 31 in a side view.
　車輪支持部材２４の受圧面部２４ｂ，２４ｃは、連動部材３１に向くように車輪支持部材２４に設けられており、車輪支持部材２４の受圧面部２４ｃが、車輪支持部材２４の受圧面部２４ｂから少し後側の斜め下側に延出されている。 The pressure-receiving surface portions 24b and 24c of the wheel support member 24 are provided on the wheel support member 24 so as to face the interlocking member 31, and the pressure-receiving surface portion 24c of the wheel support member 24 is slightly behind the pressure-receiving surface portion 24b of the wheel support member 24. It extends diagonally downward on the side.
（案内部材と車輪支持部材との後側への移動状態）
　図５に示す状態は、支持ブラケット１９が下降位置ＤＤに固定された状態において、車輪支持部材２４がコイルバネ２７により最前位置ＦＭに移動した状態であり、連動部材３１の端部３１ａが車輪支持部材２４の受圧面部２４ｃに接触した状態である。 (Movement state of guide member and wheel support member to the rear side)
The state shown in FIG. 5 is a state in which the wheel support member 24 is moved to the front position FM by the coil spring 27 in a state where the support bracket 19 is fixed to the lowering position DD, and the end 31a of the interlocking member 31 is the wheel support member. It is in a state of being in contact with the pressure receiving surface portion 24c of 24.
　この状態で、連動部材３１と車輪支持部材２４の受圧面部２４ｃとが、側面視で直角に近い状態で交差しており、連動部材３１の端部３１ａにおける長さＬ１の略全範囲が車輪支持部材２４の受圧面部２４ｃに接触する線接触状態となっている。 In this state, the interlocking member 31 and the pressure receiving surface portion 24c of the wheel supporting member 24 intersect in a state close to a right angle in a side view, and substantially the entire range of the length L1 at the end portion 31a of the interlocking member 31 is the wheel support. It is in a line contact state in contact with the pressure receiving surface portion 24c of the member 24.
　後述の（畝形成作業及び土寄せ作業）に記載のように、ロータリ耕耘装置３からの土の作用により、図５から図６に示すように、案内部材５が後側に移動すると、連動部材３１の端部３１ａと車輪支持部材２４の受圧面部２４ｃとの接触により、案内部材５の後側への移動が車輪支持部材２４に伝達されて、車輪支持部材２４がコイルバネ２７に抗して最前位置ＦＭから後側に移動する。
　このように、案内部材５と車輪支持部材２４とが、連動機構３０により、コイルバネ２７に抗して、ロータリ耕耘装置３から離れる後側に移動する。 As described later (ridge forming work and soil gathering work), when the guide member 5 moves to the rear side due to the action of the soil from the rotary tilling device 3, as shown in FIGS. 5 to 6, the interlocking member 31 By the contact between the end portion 31a of the wheel support member 24 and the pressure receiving surface portion 24c of the wheel support member 24, the movement of the guide member 5 to the rear side is transmitted to the wheel support member 24, and the wheel support member 24 is in the foremost position against the coil spring 27. Move from FM to the rear side.
In this way, the guide member 5 and the wheel support member 24 move to the rear side away from the rotary tillage device 3 against the coil spring 27 by the interlocking mechanism 30.
　前述の（車輪及び車輪支持部材の構成）に記載のように、支軸３２（軸芯Ｐ１）の位置と支軸２６（軸芯Ｐ２）の位置とが異なることにより、案内部材５の移動軌跡と車輪支持部材２４の移動軌跡とが異なっている。 As described in the above (configuration of the wheel and the wheel support member), the movement locus of the guide member 5 is caused by the difference between the position of the support shaft 32 (axle core P1) and the position of the support shaft 26 (shaft core P2). And the movement locus of the wheel support member 24 are different.
　この状態において、図５から図６に示すように、案内部材５が後側に移動すると、案内部材５の移動軌跡と車輪支持部材２４の移動軌跡との違いにより、連動部材３１の端部３１ａが車輪支持部材２４の受圧面部２４ｃから上側に摺動するように移動して、案内部材５と車輪支持部材２４との移動軌跡の差が吸収されながら、案内部材５の後側への移動が車輪支持部材２４に無理なく伝達される。 In this state, as shown in FIGS. 5 to 6, when the guide member 5 moves to the rear side, the end 31a of the interlocking member 31 due to the difference between the movement locus of the guide member 5 and the movement locus of the wheel support member 24. Moves so as to slide upward from the pressure receiving surface portion 24c of the wheel support member 24, and the guide member 5 moves to the rear side while absorbing the difference in the movement locus between the guide member 5 and the wheel support member 24. It is transmitted to the wheel support member 24 without difficulty.
　図６に示すように、車輪支持部材２４が最後位置ＢＭに達すると、連動部材３１の端部３１ａは車輪支持部材２４の受圧面部２４ｂに達する。
　この状態で、連動部材３１と車輪支持部材２４の受圧面部２４ｂとが、側面視で直角に近い状態で交差しており、連動部材３１の端部３１ａにおける長さＬ１の略全範囲が車輪支持部材２４の受圧面部２４ｂに接触する線接触状態となっている。 As shown in FIG. 6, when the wheel support member 24 reaches the final position BM, the end portion 31a of the interlocking member 31 reaches the pressure receiving surface portion 24b of the wheel support member 24.
In this state, the interlocking member 31 and the pressure receiving surface portion 24b of the wheel supporting member 24 intersect in a state close to a right angle in a side view, and substantially the entire range of the length L1 at the end portion 31a of the interlocking member 31 is the wheel support. It is in a line contact state in contact with the pressure receiving surface portion 24b of the member 24.
（案内部材と車輪支持部材との前側への移動状態）
　歩行型管理機の路上等での移動時のように、ロータリ耕耘装置３からの土の作用が消えると、車輪支持部材２４がコイルバネ２７により前側に移動する。 (Movement state of the guide member and the wheel support member to the front side)
When the action of soil from the rotary tillage device 3 disappears, as in the case of moving the walking type management machine on the road, the wheel support member 24 moves to the front side by the coil spring 27.
　図６から図５に示すように、車輪支持部材２４がコイルバネ２７により最後位置ＢＭから前側に移動すると、連動部材３１の端部３１ａと車輪支持部材２４の受圧面部２４ｂとの接触により、車輪支持部材２４の前側への移動が案内部材５に伝達されて、案内部材５が前側に移動する。
　このように、案内部材５と車輪支持部材２４とが、コイルバネ２７及び連動機構３０により、ロータリ耕耘装置３に接近する前側に移動する。言い換えると、車輪支持部材２４は、コイルバネ２７によって前側へ付勢され、案内部材５は、車輪支持部材２４と連動機構３０とを介して、コイルバネ２７によって前側へ付勢されている。 As shown in FIGS. 6 to 5, when the wheel support member 24 is moved forward from the last position BM by the coil spring 27, the wheel is supported by the contact between the end portion 31a of the interlocking member 31 and the pressure receiving surface portion 24b of the wheel support member 24. The movement of the member 24 to the front side is transmitted to the guide member 5, and the guide member 5 moves to the front side.
In this way, the guide member 5 and the wheel support member 24 are moved to the front side approaching the rotary tillage device 3 by the coil spring 27 and the interlocking mechanism 30. In other words, the wheel support member 24 is urged to the front side by the coil spring 27, and the guide member 5 is urged to the front side by the coil spring 27 via the wheel support member 24 and the interlocking mechanism 30.
　車輪支持部材２４が前側に移動すると、案内部材５の移動軌跡と車輪支持部材２４の移動軌跡との違いにより、前述の（案内部材と車輪支持部材との後側への移動状態）の記載とは逆に、連動部材３１の端部３１ａが車輪支持部材２４の受圧面部２４ｂから下側に摺動するように移動して、案内部材５と車輪支持部材５２４との移動軌跡の差が吸収されながら、車輪支持部材２４の前側への移動が案内部材に無理なく伝達される。車輪支持部材２４が最前位置ＦＭに達すると、連動部材３１の端部３１ａは車輪支持部材２４の受圧面部２４ｃに達する。 When the wheel support member 24 moves to the front side, the difference between the movement locus of the guide member 5 and the movement locus of the wheel support member 24 causes the above-mentioned description (the state of movement of the guide member and the wheel support member to the rear side). On the contrary, the end portion 31a of the interlocking member 31 moves so as to slide downward from the pressure receiving surface portion 24b of the wheel support member 24, and the difference in the movement locus between the guide member 5 and the wheel support member 524 is absorbed. However, the movement of the wheel support member 24 to the front side is reasonably transmitted to the guide member. When the wheel support member 24 reaches the front position FM, the end portion 31a of the interlocking member 31 reaches the pressure receiving surface portion 24c of the wheel support member 24.
　図５に示すように、最前位置ＦＭにおいて、連動部材３１と車輪支持部材２４の受圧面部２４ｃとが、側面視で直角に近い状態で交差している。図６に示すように、最後位置ＢＭにおいて、連動部材３１と車輪支持部材２４の受圧面部２４ｂとが、側面視で直角に近い状態で交差している。 As shown in FIG. 5, in the front position FM, the interlocking member 31 and the pressure receiving surface portion 24c of the wheel support member 24 intersect in a state close to a right angle in a side view. As shown in FIG. 6, at the final position BM, the interlocking member 31 and the pressure receiving surface portion 24b of the wheel support member 24 intersect in a state close to a right angle in a side view.
　これにより、最前位置ＦＭと最後位置ＢＭとの間の位置においても、連動部材３１と車輪支持部材２４の受圧面部２４ｂ，２４ｃとが、側面視で直角に近い状態で交差することになり、連動部材３１の端部３１ａにおける長さＬ１の多くの範囲が車輪支持部材２４の受圧面部２４ｂ，２４ｃに接触する線接触状態が得られる。 As a result, even at the position between the front position FM and the rearmost position BM, the interlocking member 31 and the pressure receiving surface portions 24b and 24c of the wheel support member 24 intersect in a state close to a right angle in the side view, and interlocking. A line contact state is obtained in which a large range of the length L1 at the end portion 31a of the member 31 contacts the pressure receiving surface portions 24b and 24c of the wheel support member 24.
（歩行型管理機の移動）
　路上等において歩行型管理機を移動させる場合、作業者は、ロータリ耕耘装置３を停止させた状態で、図１，５，８，９に示すように、支持ブラケット１９を下降位置ＤＤに操作して固定するのであり、抵抗部材７を前向きに設定する。 (Movement of walking management machine)
When moving the walking type management machine on the road or the like, the operator operates the support bracket 19 to the lowering position DD as shown in FIGS. 1, 5, 8 and 9 with the rotary tillage device 3 stopped. And fix it, and set the resistance member 7 forward.
　前述の（案内部材と車輪支持部材との前側への移動状態）に記載のように、案内部材５と車輪支持部材２４とが、コイルバネ２７及び連動機構３０により、ロータリ耕耘装置３に接近する前側に移動するのであり、ストッパー部材２９が支持ブラケット１９の前ストッパー部１９ａに当たって、車輪支持部材２４及び車輪６が最前位置ＦＭで止められる。 As described in the above (moving state of the guide member and the wheel support member to the front side), the front side where the guide member 5 and the wheel support member 24 approach the rotary tillage device 3 by the coil spring 27 and the interlocking mechanism 30. The stopper member 29 hits the front stopper portion 19a of the support bracket 19, and the wheel support member 24 and the wheel 6 are stopped at the front position FM.
　車輪支持部材２４及び車輪６が最前位置ＦＭに位置すると、最前位置ＦＭの車輪６の接地位置Ｓ１が、側面視でロータリ耕耘装置３及び車輪６が接地した状態での車輪支持部材２４の支軸２６（軸芯Ｐ２）を通る鉛直線Ｅ１に対して、前側に位置する。車輪支持部材２４が、側面視で車輪支持部材２４の上端部が車輪支持部材２４の下端部よりも後側に位置する後傾姿勢となる。 When the wheel support member 24 and the wheel 6 are located at the front position FM, the ground contact position S1 of the wheel 6 at the front position FM is the support shaft of the wheel support member 24 with the rotary tiller 3 and the wheel 6 grounded in a side view. It is located on the front side with respect to the vertical line E1 passing through 26 (axis core P2). The wheel support member 24 is in a backward tilted posture in which the upper end portion of the wheel support member 24 is located rearward from the lower end portion of the wheel support member 24 in a side view.
　これにより、図１に示すように、最前位置ＦＭの車輪６の接地位置Ｓ１から操縦ハンドル４の後端部までの長さＬ３が、最前位置ＦＭの車輪６の接地位置Ｓ１から歩行型管理機の前端部までの長さＬ２に比べて長いものとなる。 As a result, as shown in FIG. 1, the length L3 from the ground contact position S1 of the wheel 6 of the front position FM to the rear end of the steering handle 4 is changed from the ground contact position S1 of the wheel 6 of the front position FM to the walking type management machine. It is longer than the length L2 to the front end of.
　作業者は、操縦ハンドル４の後端部のグリップ部４ａを持ちながら押し下げることにより、ロータリ耕耘装置３を楽に持ち上げることができるのであり、操縦ハンドル４の後端部のグリップ部４ａを持ちながら、車輪６によって歩行型管理機を移動させることができる。 The operator can easily lift the rotary tillage device 3 by pushing down while holding the grip portion 4a at the rear end of the steering handle 4, and while holding the grip 4a at the rear end of the steering handle 4. The walking type management machine can be moved by the wheels 6.
　ロータリ耕耘装置３が持ち上げられると、歩行型管理機の略全重量が車輪６及び車輪支持部材２４に掛かり、歩行型管理機の重量に基づく曲げモーメントが、後傾姿勢の車輪支持部材２４に掛かる。 When the rotary tiller 3 is lifted, substantially the entire weight of the walking type management machine is applied to the wheels 6 and the wheel support member 24, and a bending moment based on the weight of the walking type management machine is applied to the wheel support member 24 in the backward leaning posture. ..
　図５に示すように、車輪支持部材２４の支軸２６（軸芯Ｐ２）から車輪支持部材２４における車輪６が支持された車軸部２５までの長さＬ４が、案内部材５の上端部（支軸３２（軸芯Ｐ１））から下端部（案内板１８の下端部）までの長さＬ５よりも、短い長さに設定されており、車輪支持部材２４（長さＬ４）が比較的短いものとなっている。
　これにより、歩行型管理機の重量に基づく曲げモーメントが車輪支持部材２４に掛かっても、車輪支持部材２４（長さＬ４）が短いことにより、曲げモーメントが抑えられるのであり、車輪支持部材２４の耐久性の向上の面で有利である。 As shown in FIG. 5, the length L4 from the support shaft 26 (shaft core P2) of the wheel support member 24 to the axle portion 25 on which the wheel 6 of the wheel support member 24 is supported is the upper end portion (support) of the guide member 5. The length from the shaft 32 (axle core P1)) to the lower end (lower end of the guide plate 18) is set to be shorter than the length L5, and the wheel support member 24 (length L4) is relatively short. It has become.
As a result, even if a bending moment based on the weight of the walking type management machine is applied to the wheel support member 24, the bending moment is suppressed due to the short wheel support member 24 (length L4), and the wheel support member 24 It is advantageous in terms of improving durability.
（畝形成作業及び土寄せ作業）
　歩行型管理機において、ロータリ耕耘装置３からの土を案内部材５により左右両外側に案内して畝を形成する畝形成作業や、圃場に形成された畝の間を走行しながら、ロータリ耕耘装置３からの土を案内部材５により左右両外側に案内して畝に寄せる土寄せ作業が行われる場合、以下の説明のような作業が行われる。 (Ridging work and soil gathering work)
In the walk-behind management machine, the rotary tilling device is used for ridge forming work in which the soil from the rotary tilling device 3 is guided to the left and right outside by the guide member 5 to form ridges, and while traveling between the ridges formed in the field. When the soil from 3 is guided to the left and right outside by the guide member 5 and the soil is brought to the ridge, the work as described below is performed.
　図２に示すように、圃場において、作業者は、支持ブラケット１９を下降位置ＤＤに操作して固定して、抵抗部材７を前向きに設定するのであり、ロータリ耕耘装置３を作動させながら、歩行型管理機を走行させる。 As shown in FIG. 2, in the field, the operator operates and fixes the support bracket 19 to the descending position DD to set the resistance member 7 forward, and walks while operating the rotary tillage device 3. Run the type management machine.
　ロータリ耕耘装置３から後側に飛ばされた土が案内部材５に当たったり、ロータリ耕耘装置３の耕耘により盛り上がった土に案内部材５の下端部が接触したりする等のロータリ耕耘装置３からの土の作用が、案内部材５に掛かる。 From the rotary tillage device 3, the soil blown to the rear side from the rotary tillage device 3 hits the guide member 5, or the lower end portion of the guide member 5 comes into contact with the soil raised by the tillage of the rotary tillage device 3. The action of soil is applied to the guide member 5.
　前述の（案内部材と車輪支持部材との後側への移動状態）の記載及び図２，６に示すように、ロータリ耕耘装置３からの土の作用により、案内部材５が後側に移動し、連動機構３０により車輪支持部材２４がコイルバネ２７に抗して最前位置ＦＭから後側に移動するのであり、案内部材５と車輪支持部材２４とが、ロータリ耕耘装置３から離れる後側に移動する。 As described above (moving state of the guide member and the wheel support member to the rear side) and as shown in FIGS. 2 and 6, the guide member 5 moves to the rear side due to the action of soil from the rotary tillage device 3. The interlocking mechanism 30 causes the wheel support member 24 to move rearward from the front position FM against the coil spring 27, and the guide member 5 and the wheel support member 24 move to the rear side away from the rotary tillage device 3. ..
　車輪支持部材２４が最後位置ＢＭに達すると、ストッパー部材２９が支持ブラケット１９の後ストッパー部１９ｂに当たることによって、車輪支持部材２４及び車輪６が最後位置ＢＭで止められる。 When the wheel support member 24 reaches the final position BM, the stopper member 29 hits the rear stopper portion 19b of the support bracket 19, so that the wheel support member 24 and the wheel 6 are stopped at the final position BM.
　車輪６が最後位置ＢＭに位置すると、案内部材５が、側面視で案内部材５の上端部が案内部材５の下端部に対して前側に位置する前傾姿勢となる。前傾姿勢の案内部材５によって、ロータリ耕耘装置３からの土が左右両外側及び下側に案内され易くなるのであり、畝の形成及び土寄せが安定して行われるようになる。 When the wheel 6 is located at the final position BM, the guide member 5 is in a forward leaning posture in which the upper end portion of the guide member 5 is located forward with respect to the lower end portion of the guide member 5 in a side view. The guide member 5 in the forward leaning posture facilitates the guidance of the soil from the rotary tillage device 3 to the left and right outer sides and the lower side, so that the ridges are formed and the soil is stably gathered.
　前述の状態において、案内部材５がさらに後側に移動しようとしても、ストッパー部材２９が支持ブラケット１９の後ストッパー部１９ｂに当たって、車輪支持部材２４が最後位置ＢＭで止められることにより、案内部材５が止められる。 In the above-mentioned state, even if the guide member 5 tries to move further to the rear side, the stopper member 29 hits the rear stopper portion 19b of the support bracket 19, and the wheel support member 24 is stopped at the final position BM, so that the guide member 5 can be moved. Can be stopped.
　ロータリ耕耘装置３からの土の作用により案内部材５が後側に移動する状態において、ロータリ耕耘装置３からの土の作用が大きい場合には、前述のように車輪支持部材２４が最後位置ＢＭに達するまで、案内部材５は後側に移動する。 In a state where the guide member 5 is moved to the rear side by the action of soil from the rotary tillage device 3, if the action of soil from the rotary tillage device 3 is large, the wheel support member 24 is moved to the final position BM as described above. The guide member 5 moves to the rear side until it reaches.
　ロータリ耕耘装置３からの土の作用が小さい場合には、案内部材５が、車輪支持部材２４が最後位置ＢＭに達するまで後側に移動しない状態が生じることがあり、この状態において、案内部材５は、車輪支持部材２４が最後位置ＢＭで止められた状態での案内部材５の前傾姿勢よりも、少し直立した姿勢に近くなる。 When the action of soil from the rotary tiller 3 is small, the guide member 5 may not move to the rear side until the wheel support member 24 reaches the final position BM. In this state, the guide member 5 Is a little closer to an upright posture than the forward leaning posture of the guide member 5 in the state where the wheel support member 24 is stopped at the final position BM.
　以上のように、ロータリ耕耘装置３からの土の作用が大きくなるほど、案内部材５とロータリ耕耘装置３との間の距離が長くなり、案内部材５は前傾姿勢に近くなる。ロータリ耕耘装置３からの土の作用が小さくなるほど、案内部材５とロータリ耕耘装置３との間の距離が短くなり、案内部材５は直立姿勢に近くなる。 As described above, the greater the action of soil from the rotary tillage device 3, the longer the distance between the guide member 5 and the rotary tillage device 3, and the closer the guide member 5 is to the forward leaning posture. The smaller the action of soil from the rotary tiller 3, the shorter the distance between the guide member 5 and the rotary tiller 3, and the closer the guide member 5 is to an upright posture.
（耕耘作業）
　歩行型管理機において、圃場の耕耘作業が行われる場合、以下の説明のような作業が行われる。 (Tilling work)
When the field is cultivated in the walking type management machine, the work as described below is performed.
　図３，４，７に示すように、作業者は、支持ブラケット１９を上昇位置ＵＵに操作して固定し、抵抗部材７を下向きに設定する。支持ブラケット１９が上昇位置ＵＵに操作されると、抵抗部材７が支持アーム１６の開口部１６ａに挿入されていることによって、抵抗部材７により案内部材５が持ち上げられる。 As shown in FIGS. 3, 4, and 7, the operator operates and fixes the support bracket 19 to the ascending position UU, and sets the resistance member 7 downward. When the support bracket 19 is operated to the ascending position UU, the resistance member 7 is inserted into the opening 16a of the support arm 16, so that the guide member 5 is lifted by the resistance member 7.
　ロータリ耕耘装置３を作動させて、歩行型管理機を走行させることにより、抵抗部材７により歩行型管理機の前進が抑えられながら、ロータリ耕耘装置３により圃場の耕耘が行われる。 By operating the rotary tillage device 3 and running the walking type management machine, the rotary tillage device 3 cultivates the field while the resistance member 7 suppresses the advance of the walking type management machine.
（発明の実施の第１別形態）
　連動機構３０において、連動部材３１が、車輪支持部材２４に取り付けられて案内部材５に向けて延出され、受圧面部２４ｂ，２４ｃが、案内部材５に取り付けられて連動部材３１に向くように構成されてもよい。 (First alternative form of carrying out the invention)
In the interlocking mechanism 30, the interlocking member 31 is attached to the wheel support member 24 and extends toward the guide member 5, and the pressure receiving surface portions 24b and 24c are attached to the guide member 5 and face the interlocking member 31. May be done.
（発明の実施の第２別形態）
　連動機構３０が、連動部材３１と受圧面部２４ｂ，２４ｃとの接触構造を有するように構成されるのではなく、案内部材５と車輪支持部材２４とに亘って連結されるように構成されてもよい。
　この構成によると、付勢機構が案内部材５を前側に付勢するように構成されてもよく、付勢機構が案内部材５と車輪支持部材２４との両方を前側に付勢するように構成されてもよい。 (Second alternative form of carrying out the invention)
Even if the interlocking mechanism 30 is not configured to have a contact structure between the interlocking member 31 and the pressure receiving surface portions 24b and 24c, but is configured to be connected to the guide member 5 and the wheel support member 24. Good.
According to this configuration, the urging mechanism may be configured to urge the guide member 5 to the front side, and the urging mechanism may be configured to urge both the guide member 5 and the wheel support member 24 to the front side. May be done.
（発明の実施の第３別形態）
　案内部材５と車輪支持部材２４とが、異なる個別の支軸３２（軸芯Ｐ１）及び支軸２６（軸芯Ｐ２）に揺動可能に支持されるのではなく、同一の支軸（軸芯）周りに揺動可能に支持されてもよい。この構成によると、前述の（発明の実施の第２別形態）が実施され易くなる。 (Third alternative form of carrying out the invention)
The guide member 5 and the wheel support member 24 are not swingably supported by different individual support shafts 32 (axle core P1) and support shaft 26 (shaft core P2), but are the same support shaft (axle core P2). ) It may be supported so as to be swingable around. According to this configuration, the above-mentioned (second alternative form of carrying out the invention) can be easily carried out.
　この構成において、車輪６が最前位置ＦＭに位置すると、最前位置ＦＭの車輪６の接地位置Ｓ１が、側面視でロータリ耕耘装置３及び車輪６が接地した状態での前述の同一の支軸（軸芯）を通る鉛直線Ｅ１に対して、前側に位置するように構成すればよい。 In this configuration, when the wheel 6 is located at the front position FM, the ground contact position S1 of the wheel 6 at the front position FM is the same support shaft (axis) as described above in a state where the rotary tiller 3 and the wheel 6 are grounded in a side view. It may be configured to be located on the front side with respect to the vertical straight line E1 passing through the core).
　前述のように、案内部材５と車輪支持部材２４とが同一の支軸（軸芯）周りに揺動可能に支持される場合、一つの支軸（軸芯）周りに前後方向に揺動可能に支持された支持部材（図示せず）に、案内部材５の支持板１７及び案内板１８と車輪６とが支持され、支持部材が付勢機構により前側に付勢されるように構成されるとよい。
　この構成によると、支持部材が、案内部材５の支持アーム１６の機能と、車輪支持部材２４の機能と、連動機構３０の機能とを有することになる。 As described above, when the guide member 5 and the wheel support member 24 are supported so as to be swingable around the same support shaft (axle core), they can swing in the front-rear direction around one support shaft (axle core). The support plate 17 and the guide plate 18 of the guide member 5 and the wheel 6 are supported by the support member (not shown) supported by the wheel 6, and the support member is configured to be urged to the front side by the urging mechanism. It is good.
According to this configuration, the support member has the function of the support arm 16 of the guide member 5, the function of the wheel support member 24, and the function of the interlocking mechanism 30.
（発明の実施の第４別形態）
　案内部材５と車輪支持部材２４とが、揺動可能に支持されるのではなく、前後方向に沿ってスライド移動可能に支持されてもよい。
　原動部として、エンジン２に代えて、電動モータ（図示せず）が設けられてもよい。 (Fourth alternative form of carrying out the invention)
The guide member 5 and the wheel support member 24 may not be supported so as to be swingable, but may be supported so as to be slidably movable along the front-rear direction.
An electric motor (not shown) may be provided as a driving unit instead of the engine 2.
　本発明は、圃場での畝形成作業や土寄せ作業等を行う歩行型管理機に適用できる。 The present invention can be applied to a walking type management machine that performs ridge forming work, soil gathering work, etc. in a field.
　１　　　伝動ケース（機体）
　２　　　エンジン（原動部）
　３　　　ロータリ耕耘装置
　４　　　操縦ハンドル
　５　　　案内部材
　６　　　車輪
　２４　　車輪支持部材
　２４ｂ　受圧面部
　２４ｃ　受圧面部
　２６　　支軸
　２７　　コイルバネ（付勢機構）
　３０　　連動機構
　３１　　連動部材
　３２　　支軸
　Ｅ１　　鉛直線
　ＦＭ　　最前位置
　ＢＭ　　最後位置
　Ｌ４　　長さ
　Ｌ５　　長さ
　Ｐ１　　軸芯
　Ｐ２　　軸芯
　Ｓ１　　接地位置
  1 Transmission case (airframe)
2 engine (driving part)
3 Rotary tiller 4 Steering handle 5 Guide member 6 Wheel 24 Wheel support member 24b Pressure receiving surface 24c Pressure receiving surface 26 Support shaft 27 Coil spring (biasing mechanism)
30 Interlocking mechanism 31 Interlocking member 32 Support shaft E1 Vertical line FM Front position BM Last position L4 Length L5 Length P1 Axis core P2 Axis core S1 Grounding position

Claims (8)

  1. 　機体に支持された原動部と、
    　前記機体から後側に延出されるように前記機体に支持された操縦ハンドルと、
    　前記原動部に対して下側に位置するように前記機体に支持されて、前記原動部の動力により駆動されるロータリ耕耘装置と、
    　側面視で、前記ロータリ耕耘装置に対して後側に配置され、前後方向に移動可能に前記機体に支持されて、前記ロータリ耕耘装置からの土を左右両外側に案内する案内部材と、
    　側面視で、前記案内部材に対して後側に配置された車輪と、
    　前記車輪を前後方向に移動可能に、前記機体に支持する車輪支持部材と、
    　前記案内部材と前記車輪支持部材とを一体的に前側に付勢する付勢機構とが備えられ、
    　前記案内部材と前記車輪支持部材とは、前記付勢機構により前記ロータリ耕耘装置に接近する前側に移動可能であり、且つ、前記ロータリ耕耘装置からの土の作用により前記付勢機構に抗して前記ロータリ耕耘装置から離れる後側に移動可能である歩行型管理機。     The driving part supported by the aircraft and
    A steering handle supported by the aircraft so as to extend rearward from the aircraft,
    A rotary tiller that is supported by the airframe so as to be located below the prime mover and driven by the power of the prime mover.
    From the side view, a guide member which is arranged on the rear side of the rotary tillage device, is supported by the machine body so as to be movable in the front-rear direction, and guides the soil from the rotary tillage device to the left and right outside.
    From the side view, the wheels arranged on the rear side with respect to the guide member,
    A wheel support member that supports the airframe so that the wheels can be moved in the front-rear direction,
    An urging mechanism that integrally urges the guide member and the wheel support member to the front side is provided.
    The guide member and the wheel support member can be moved to the front side approaching the rotary tillage device by the urging mechanism, and can resist the urging mechanism by the action of soil from the rotary tillage device. A walk-behind management machine that can be moved to the rear side away from the rotary tillage device.
  2. 　前記案内部材と前記車輪支持部材とに亘って設けられて、前記案内部材と前記車輪支持部材とを一体的に前後方向に移動させる連動機構が備えられている請求項１に記載の歩行型管理機。 The walking type management according to claim 1, further comprising an interlocking mechanism provided over the guide member and the wheel support member to integrally move the guide member and the wheel support member in the front-rear direction. Machine.
  3. 　前記付勢機構は、前記車輪支持部材を前側に付勢し、
    　前記連動機構に、前記案内部材と前記車輪支持部材とのうちの一方に取り付けられて前記案内部材と前記車輪支持部材とのうちの他方に向けて延出された連動部材と、前記案内部材と前記車輪支持部材とのうちの他方に取り付けられて前記連動部材に向いた受圧面部とが設けられ、
    　前記ロータリ耕耘装置からの土の作用による前記案内部材の後側への移動が、前記連動部材と前記受圧面部との接触により前記車輪支持部材に伝達されて、前記付勢機構に抗して、前記車輪支持部材が後側に移動可能であり、
    　前記付勢機構による前記車輪支持部材の前側への移動が、前記連動部材と前記受圧面部との接触により前記案内部材に伝達されて、前記案内部材が前側に移動可能である請求項２に記載の歩行型管理機。     The urging mechanism urges the wheel support member to the front side.
    An interlocking member attached to one of the guide member and the wheel support member and extended toward the other of the guide member and the wheel support member, and the guide member. A pressure receiving surface portion attached to the other of the wheel support members and facing the interlocking member is provided.
    The movement of the guide member to the rear side due to the action of soil from the rotary tiller is transmitted to the wheel support member by the contact between the interlocking member and the pressure receiving surface portion, and opposes the urging mechanism. The wheel support member can be moved to the rear side,
    The second aspect of claim 2, wherein the movement of the wheel support member by the urging mechanism to the front side is transmitted to the guide member by contact between the interlocking member and the pressure receiving surface portion, and the guide member can move to the front side. Walk-type management machine.
  4. 　前記案内部材及び前記車輪支持部材が、前記機体の左右方向に沿った軸芯周りに揺動可能に支持されることにより、前後方向に移動可能である請求項１～３のうちのいずれか一項に記載の歩行型管理機。 Any one of claims 1 to 3 in which the guide member and the wheel support member are swingably supported around an axis along the left-right direction of the airframe so as to be movable in the front-rear direction. The walking type management machine described in the section.
  5. 　前記案内部材と前記車輪支持部材とが、個別の支軸により前記機体の左右方向に沿った軸芯周りに揺動可能に支持されることにより、前後方向に移動可能である請求項１～４のうちのいずれか一項に記載の歩行型管理機。 Claims 1 to 4 in which the guide member and the wheel support member can be moved in the front-rear direction by being swingably supported around an axis center along the left-right direction of the airframe by individual support shafts. The walking type management machine according to any one of the items.
  6. 　前記付勢機構がコイルバネであり、前記コイルバネの内部を前記車輪支持部材の軸芯が通るように、前記コイルバネが配置されている請求項４又は５に記載の歩行型管理機。 The walking type management machine according to claim 4 or 5, wherein the urging mechanism is a coil spring, and the coil spring is arranged so that the axis of the wheel support member passes through the inside of the coil spring.
  7. 　前記車輪が前後移動の最前位置に位置すると、
    　最前位置の前記車輪の接地位置が、側面視で前記ロータリ耕耘装置及び前記車輪が接地した状態での前記車輪支持部材の軸芯を通る鉛直線に対して、前側に位置する請求項４～６のうちのいずれか一項に記載の歩行型管理機。     When the wheel is located in the foremost position of forward / backward movement,
    Claims 4 to 6 in which the ground contact position of the wheel at the foremost position is located on the front side with respect to the vertical line passing through the axis of the rotary tiller and the wheel support member in a state where the wheel is in contact with the ground in a side view. The walking type management machine according to any one of the items.
  8. 　前記車輪が前後移動の最後位置に位置すると、
    　前記案内部材が、側面視で前記案内部材の上端部が前記案内部材の下端部に対して前側に位置する前傾姿勢となる請求項１～７のうちのいずれか一項に記載の歩行型管理機。
          When the wheel is located at the end of the front-back movement,
    The walking type according to any one of claims 1 to 7, wherein the guide member is in a forward leaning posture in which the upper end portion of the guide member is located on the front side with respect to the lower end portion of the guide member in a side view. Management machine.
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