JP2011036209A - Walking type management machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a walking type management machine, which can eliminate a work wherein a worker lifts a steering handle in the opposite direction and advances the walking type management machine to prevent the flotation of a tilling mechanism, on a work for lifting soil. <P>SOLUTION: The walking type management machine includes: a power source 7 loaded on a machine frame 1; a pair of right and left travel portions 2 back and forth arranged side by side below the machine frame 1; the tilling mechanism 3; and a steering handle 4 disposed in a direction-changeable state at the upper part of the machine frame 1, wherein an auxiliary wheel body 40 contacting with the ground to support the machine frame 1 together with the travel portions 2 on the travel of the tilling mechanism 3 on the front side of the travel direction is upward or downward adjustably attached to an end portion opposite to the tilling mechanism 3 via the travel portions 2 in the machine frame 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a walking type management machine in which an operator performs a steering operation while grasping a steering handle and walking.

  In general, a walking type management machine includes an engine mounted on the airframe, wheels and a tilling mechanism arranged side by side below the airframe, and a steering handle provided on the upper part of the airframe. The wheel is located directly under the aircraft in side view. The tillage mechanism is located below the fuselage and farther from the fuselage than the wheels. The steering handle is configured to be able to change the direction before and after the traveling direction. That is, the steering handle is configured to be able to change the posture between a normal handle posture that extends upward from the tilling mechanism and a reverse handle posture that extends upward away from the tilling mechanism (see, for example, Patent Documents 1 and 2). .

  In this type of walking-type management machine, for example, covering work to cover the base of crops such as leeks, and grooving / raising work to raise the soil to plant the crops (hereinafter referred to as "landing work") When moving the farm, move the steering handle in the reverse position and move the tilling mechanism forward so that the tilling claw of the tilling mechanism rotates forward (rotates toward the wheels with respect to the field). As a result, the soil is spun up and dug up.

Japanese Utility Model Publication No. 2-134801 JP-A-7-308102

  By the way, during the earthing work, the tilling force due to the normal rotation of the tilling claw (rotation toward the wheel side with respect to the field) acts in the direction of raising the tilling mechanism and the machine body obliquely upward (the tilling mechanism is against the field). It makes me feel like floating) For this reason, the operator is forced to prevent the tilling mechanism from being lifted by advancing the walking type management machine while pulling up the steering handle in the handle reverse posture. Such an operation is extremely hard work, and the conventional walking type management machine has a large burden in the earthing work.

  In addition, after the earthing work, the walking-type management machine is allowed to escape from between adjacent ridges while the posture of the walking-type management machine is set to a state where the tilling mechanism is lifted away from the field. However, in this case, since only the wheels are in contact with the ground and support the walking type management machine, the walking type management machine is likely to fluctuate in the right and left direction of travel. It is troublesome to restore the posture of the walking type management machine once it is staggered because it is an operation that requires arm strength, and is particularly burdensome for a weak operator.

  Therefore, the present invention has a technical problem to provide a walking type management machine that solves the above problems.

  The invention of claim 1 includes a power source mounted on the airframe, a traveling unit and a tilling mechanism arranged side by side below the airframe, and a steering handle provided on the upper portion of the airframe so as to be capable of changing its orientation. A walking-type management machine comprising: a grounding portion of the airframe that is opposite to the tillage mechanism across the traveling unit when the tillage mechanism is moved forward in the traveling direction. In addition, an auxiliary support body that supports the machine body together with the traveling portion is attached so as to be adjustable up and down.

  A second aspect of the present invention is the walking management machine according to the first aspect, wherein the auxiliary support body is provided with a damper means for pressing it against the ground.

  According to a third aspect of the present invention, in the walking type management machine according to the first or second aspect, the auxiliary support has a residual tillage processing plate for leveling the residual tillage of the grooved floor between adjacent ridges. It is attached detachably.

  As described above, during the earthing operation, the tilling force due to the normal rotation of the tilling claws acts in a direction in which the tilling mechanism, and thus the machine body, flips upward and obliquely upward (the tilling mechanism floats with respect to the field). On the other hand, according to the first aspect of the present invention, the power source mounted on the airframe, the traveling unit and the tilling mechanism arranged side by side below the airframe, and the upper portion of the airframe can be changed in direction. A steerable management machine provided with a steering handle, wherein the tilling mechanism is set to the front side in the advancing direction at an end of the airframe opposite to the tilling mechanism across the traveling unit. Since an auxiliary support body that is grounded when traveling and supports the airframe together with the traveling unit is attached so as to be adjustable up and down, the presence of the auxiliary support body is a force that makes the tilling mechanism float (the tilling mechanism). As a result, the force that flips the aircraft backward and upward is canceled. For this reason, even if the operator does not hold the steering handle in the handle reverse posture without lifting the steering handle, the operator can execute the earthing operation with a light force without lifting the tilling mechanism. Therefore, there is an effect that the burden of the earthing work can be reduced.

  In addition, after the earthing work, the walking-type management machine is allowed to escape from between adjacent ridges after the tilling mechanism is in a front-up state where the tilling mechanism is separated from the field. In this case, since the traveling unit and the auxiliary support are in contact with each other and are in a multi-point support state that supports the walking management machine, it is easy to stabilize the posture of the walking management machine, and to the left and right in the traveling direction. There is an effect that wandering can be suppressed. In addition, even if the walking type management machine fluctuates, there is an advantage that it is easy to reposition the posture by the amount of contact points.

  According to the invention of claim 2, in the walking management machine according to claim 1, the auxiliary support body is provided with damper means for pressing it against the ground. Even if an unnecessary downward load is applied to the steering handle, the grounding state between the traveling portion and the auxiliary support body is maintained by the action of the damper means. Therefore, there is an effect that it is possible to surely prevent the walking type management machine from being lifted up to the traveling unit and supported at only one point of the auxiliary support.

  According to a third aspect of the present invention, in the walking type management machine according to the first or second aspect, the auxiliary support plate is provided with a residual tillage treatment plate for leveling the residual tillage of the groove floor between adjacent ridges. Is attached in a detachable manner, the height position of the above-mentioned plowing treatment plate can be adjusted simultaneously by adjusting the height of the auxiliary support. In addition, since the auxiliary support itself also serves as a lifting adjustment mechanism for the after-plow processing board, it is not necessary to separately provide a lifting adjustment mechanism dedicated to the after-plow processing board. Therefore, the number of parts can be reduced, and the effect that the manufacturing cost can be reduced can be achieved.

It is a side view which shows the walk type management machine at the time of a steering wheel normal posture. It is a top view which shows the walk type management machine at the time of a steering wheel normal posture. It is a side view which shows the walk type management machine at the time of steering wheel reverse posture. It is a top view which shows the walk type management machine at the time of steering wheel reverse posture. It is a principal part expanded side view of an auxiliary support body and a residual cultivation processing board. It is an enlarged front view of an auxiliary support body and a residual cultivation processing board, (a) is a two-wheel state, (b) is a figure which shows a one-wheel state.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described with reference to the drawings.

(1). First, an outline of a walking type management machine will be described with reference mainly to FIGS. As shown in FIG. 1 to FIG. 4, the walking type management machine according to the embodiment has a field on a body 1 supported by a pair of left and right wheels 2 (only the left side is shown in FIGS. 1 and 3) as a traveling unit. A rotary tilling mechanism 3 for plowing is provided. The left and right wheels 2 and the tilling mechanism 3 are arranged side by side in the traveling direction. Both the left and right wheels 2 are located directly below the fuselage 1. The tilling mechanism 3 is located below the machine body 1 and on a side farther from the machine body 1 than the wheels 2 (see FIGS. 1 and 3). Accordingly, a part of the left and right wheels 2 is hidden by the body 1 in plan view, but the upper surface side of the tillage mechanism 3 is exposed without being hidden by the body 1 (see FIGS. 2 and 4).

  A steering handle 4 is provided at the upper part of the machine body 1 so as to be capable of changing its direction before and after the traveling direction. In the embodiment, the base portion of the steering handle 4 is attached to the handle base 5 at the top of the machine body 1 so as to be horizontally rotatable. Therefore, the steering handle 4 has a normal handle posture (see the solid line state in FIG. 1) extending upward from the tilling mechanism 3 and a reverse handle posture (see the solid line state in FIG. 3) extending upward from the tilling mechanism 3. The posture can be changed. In the walking management machine of the embodiment, the orientation of the machine body 1 itself is changed according to the amount of left and right operation of the steering handle 4 by the operator.

  An engine 7 and a transmission case 8 as power sources are mounted on a body frame 6 constituting the body 1. The mission case 8 protrudes downward from the body frame 6, and an axle 9 that protrudes outward on the left and right sides is rotatably supported at the lower part of the mission case 8. Wheels 2 as traveling parts are respectively attached to the left and right ends of the axle 9. Although not shown, the transmission case 8 houses a power transmission mechanism for appropriately shifting the power from the engine 7. Power from the engine 7 is transmitted to the axle 9 via a power transmission mechanism in the mission case 8, and the left and right wheels 2 are rotationally driven via the axle 9.

  The tillage mechanism 3 is detachably attached to the end of the mission case 8 on the side opposite to the engine 7 via a hitch 10. The tillage mechanism 3 of the embodiment includes a power relay case 11 that is coupled to the upper part of a transmission case 8 so that power can be transmitted, an input case 12 that is attached to one side of the power relay case 11 so as to be vertically rotatable, and an input case A vertically extending cultivation case 13 extending downward from 12, a lateral cultivation output shaft 15 rotatably supported by a gear case 14 at the lower end of the cultivation case 13, and a plurality of cultivation output shafts 15 mounted on the cultivation output shaft 15. A tilling claw 16 is provided. The tilling case 13 penetrates the rear frame 17 supported by the hitch 10 up and down. A rotary cover 18 that covers the tilling claws 16 group from above is attached to the rear frame 17.

  Although not shown, a PTO shaft protrudes from the top of the mission case 8. The power from the engine 7 is cultivated from the PTO shaft through the sprocket and chain in the power relay case 11, the bevel gear mechanism in the input case 12, the drive shaft in the tilling case 13, and the bevel gear mechanism in the gear case 14. It is transmitted to the output shaft 15 and is configured to rotationally drive the tilling claws 16 group via the tillage output shaft 15. The tilling work is executed by running the walking type management machine while rotating the tilling claws 16 group.

  The rotary cover 18 includes a central cover 19 (see FIGS. 2 and 4) fixed to the lower surface of the rear frame 17, and a horizontal cover attached to the left and right sides of the central cover 19 via hinges 21 so as to be able to flip up and rotate. 20. The base end side of the swing arm 22 is pivotally attached to a pivot bar 21 attached to the upper surface of each lateral cover 20. The adjustment column 23 erected on the rear frame 17 and the front ends of the left and right swing arms 22 are fixed by a knob screw 24 and a nut 25 at the intersection (overlapping portion). When the knob screw 24 and the nut 25 are loosened, the distal ends of the left and right swing arms 22 can be slid in the vertical direction along the adjustment column 23, and the right and left side covers 20 are simultaneously raised and lowered to adjust the flip-up angle. it can. When the knob screw 24 and the nut 25 are tightened, the left and right side covers 20 can be fixed at a predetermined flip-up angle.

  A tail wheel body 26 is attached to the end of the rear frame 17 opposite to the hitch 10 so as to be able to be raised and lowered to prevent contact with the road surface of the tilling claws 16 group when traveling on the road. In the embodiment, a boss member 27 with an insertion hole (not shown) penetrating vertically is fixed to an end of the rear frame 17 opposite to the hitch 10. The tail wheel adjusting rod 28 is inserted into the insertion hole of the boss member 27 so as to be vertically slidable. A tail wheel 30 is rotatably attached to a support arm 29 fixed to the lower side of the tail wheel adjusting rod 28. The tail wheel adjusting rod 28 is raised and lowered to the boss member 27 by screwing the presser bolt 31 from the side surface of the boss member 27 in a state where the downward protruding length of the tail wheel adjusting rod 28 from the boss member 27 is appropriately adjusted. The height of the tail wheel 30 is changed and set in a stepless (continuous) manner.

(2). Detailed Structure of Auxiliary Wheel Next, a detailed structure of the auxiliary wheel body 40 as an auxiliary support will be described with reference to FIGS. 5 and 6 in addition to FIGS. As shown in FIGS. 1 to 5, the vehicle body 1 is grounded at the end opposite to the tillage mechanism 3 with the wheel 2 interposed between the body 1 and the wheel 2 when traveling with the tillage mechanism 3 on the front side in the traveling direction. An auxiliary wheel body 40 that supports the airframe is attached so as to be adjustable up and down. In the embodiment, a holder bracket 41 formed in a bifurcated shape with a U-shaped cross section is fixed to an end of the body frame 6 opposite to the mission case 8. The pair of upper and lower flat plate portions 42 in the holder bracket 41 are formed with insertion holes positioned concentrically in the vertical direction. A height adjustment rod 43 is inserted into the insertion holes of the upper and lower flat plate portions 42 so as to be slidable up and down. In this case, the upper and lower insertion holes are formed in a square hole shape (for example, a hexagonal hole), and the height adjustment rod 43 is also formed in a rectangular column shape (for example, a hexagonal column) correspondingly. That is, the height adjusting rod 43 can only slide up and down with respect to the holder bracket 40 and cannot rotate about the longitudinal axis.

  On the lower end side of the height adjustment rod 43, a front-supporting pivot bracket 44 is attached. A horizontally long support shaft 47 is detachably mounted on the pair of left and right side plates 46 in the pivot bracket 44. A pair of left and right auxiliary wheels 48 are rotatably fitted to the support shaft 47. In this case, the supporting shaft 47 cannot be removed from the pivot bracket 44 by attaching a retaining pin 49 for retaining to the portion of the supporting shaft 47 that protrudes further outward from the left and right side plate portions 46. And it is configured to be removable. A cylindrical hub portion 50 is provided at the center of rotation of each auxiliary wheel 48 so as to protrude to one side surface of the auxiliary wheel 48. By changing the mounting order of the left and right auxiliary wheels 48 with respect to the support shaft 47 or by reversing the mounting direction of the left and right auxiliary wheels 48 with respect to the support shaft 47, the arrangement interval between the left and right auxiliary wheels 48 can be adjusted to be wider or narrower. (See FIGS. 6A and 6B). Accordingly, the pair of left and right auxiliary wheels 48 can be set in a substantially single-wheel state or set in a two-wheel state separated from each other, depending on the field conditions and work contents.

  On the upper side of the height adjusting rod 43, a plurality of locking holes 51 are formed at appropriate intervals along the longitudinal direction of the height adjusting rod 43. A stopper pin 52 is inserted and fixed in a locking hole 51 located immediately above the upper flat plate portion 42 of the holder bracket 41 in a state where the downward protruding length of the height adjusting rod 43 from the holder bracket 41 is appropriately adjusted. The height adjusting rod 43 is attached to the holder bracket 41 so as not to be lowered, and the height positions of the left and right auxiliary wheels 48 are changed and set stepwise.

  A compression spring 53 as a damper means is fitted between the lower flat plate portion 42 of the holder bracket 41 and the base portion 45 of the pivot bracket 44 in the outer periphery of the height adjusting rod 43. The pivot bracket 44 and the left and right auxiliary wheels 48 are pressed and urged downward away from the holder bracket 41 by the elastic urging force of the compression spring 53. The pivot bracket 44, the left and right auxiliary wheels 48, and the height adjustment rod 43 (auxiliary wheel body 40) are slidable upward against the elasticity of the compression spring 53. For this reason, even if a downward load more than necessary is applied to the steering handle 4 during the earthing operation in which the steering handle 4 is placed in the handle reverse posture and the tilling mechanism 3 is in the forward direction, the compression spring 53 Against this elasticity, the downward projecting length of the height adjustment rod 43 from the holder bracket 41 is shortened, and the ground contact state (three-point support state) between the wheel 2 and the auxiliary wheel body 40 is maintained. Therefore, it is possible to reliably suppress the walking type management machine from being lifted up to the wheel 2 and being supported at only one point of the auxiliary wheel body 40.

  As shown in detail in FIGS. 2 and 4, the pair of left and right auxiliary wheels 48 and the height adjusting rod 43 in the auxiliary wheel body 40 pass through the center in the left and right direction of the machine body 1 in a plan view and are orthogonal to the support shaft 47. It is located on both sides of the virtual center line A. Here, the center in the left-right direction of the airframe 1 is the front-rear direction parallel to the traveling direction of the airframe 1 and means the location of the center of gravity that is the center of mass of the airframe 1 and its vicinity. The tail wheel 30 is also located on the virtual center line A in plan view.

  As shown in FIGS. 1 to 6, a residual tillage processing plate 54 is attached to the auxiliary wheel body 40 so as to be detachable. In the embodiment, the mounting stay 55 protruding toward the wheel 2 is fixed to the base 45 of the pivot bracket 44, while the mounting stay 55 is covered on the side surface of the residual tillage processing plate 54 on the auxiliary wheel body 40 side. A fitting holder 56 to be fitted is projected. In the state where the attachment holder 56 on the afterplow treatment plate 54 side is fitted to the attachment stay 55 on the auxiliary wheel body 40 side, the afterplow treatment plate 54 is attached to the auxiliary wheel by fastening these 55 and 56 with bolts and nuts. The body 40 is configured to be detachable. In addition, the left-right width of the afterplow processing board 54 is set to a size that fits between the pair of left and right wheels 2 (see FIGS. 6A and 6B).

  In this way, since the after-plow processing plate 54 is detachably attached to the auxiliary wheel body 40 that can be adjusted up and down, the height position of the after-plow processing plate 54 can be adjusted by adjusting the downward projecting length of the height adjustment rod 43. It can be adjusted at the same time. In addition, since the auxiliary wheel body 40 also serves as a lifting adjustment mechanism for the after-plowing processing board 54, it is not necessary to separately provide a lifting adjustment mechanism dedicated to the remaining tilling processing board 54. Therefore, the number of parts can be reduced, and the manufacturing cost can be reduced.

(3). Summary In the above configuration, when performing the earthing work as shown in FIG. 3, both the lateral covers 20 in the rotary cover 18 are held in a flipped state, and the height adjustment rod 43 protrudes downward from the holder bracket 41. Adjusting the length appropriately, the height adjusting rod 43 is set to the holder bracket 41 so as not to be lowered (the height positions of the left and right auxiliary wheels 48 are set). Then, with the steering handle 4 in the reverse handle position and the tilling mechanism 3 on the front side in the traveling direction, the tilling claws 16 group of the tilling mechanism 3 are rotated forward (see the direction of arrow T in FIG. 3, the wheel 2 with respect to the field). By moving through the field while rotating toward the side), the soil is sprinkled up and dug up, and ridges F are formed on the left and right in the traveling direction of the walking type management machine.

  Here, during the earthing operation, the tilling force by the forward rotation of the tilling claws 16 group (see the direction of arrow T in FIG. 3) acts in the direction in which the tilling mechanism 3 and thus the machine body 1 are flipped up obliquely upward as described above. . That is, the tilling mechanism 3 is floating with respect to the field. On the other hand, in the embodiment, the vehicle body 1 is grounded to the end portion on the opposite side of the tillage mechanism 3 with the wheel 2 being sandwiched between the body 1 and the wheel body 2 together with the wheel 2 when traveling with the tillage mechanism 3 on the front side in the traveling direction. Since the supporting auxiliary wheel body 40 is attached so as to be able to move up and down, the presence of the auxiliary wheel body 40 makes the tilling mechanism 3 float (the force that raises the tilling mechanism 3 and then the body 1 obliquely upward and backward). It will be countered. For this reason, even if the operator does not hold the steering handle 4 in the handle reverse posture without lifting the steering handle 4, the operator can perform the earthing operation with a light force without lifting the tillage mechanism 3. Therefore, there is an effect that the burden of the earthing work can be reduced.

  In addition, after the earthing work, the walking-type management machine is caused to escape from between the adjacent ridges F after the tilling mechanism 3 is in a state of being lifted forward away from the field. However, in this case, since the pair of left and right wheels 2 and the auxiliary wheel body 40 are in contact with each other and are in a three-point support state for supporting the walking management machine, it is easy to stabilize the posture of the walking management machine and the traveling direction There is an effect that the fluctuation to the left and right can be suppressed. Even if the walking-type management machine fluctuates, it is easy to reposition the posture as much as there are many contact points. In particular, as shown in FIG. 4, if the center of gravity of the walking type management machine is located in the area inside the virtual broken line G that is V-shaped when connecting each wheel 2 and the auxiliary wheel body 40, the posture of the walking type management machine is changed. Since it can be stabilized, it is clear that the walking-type management machine has higher running stability than the two-point support state with the pair of left and right wheels 2.

  Furthermore, if the auxiliary wheel body 40 is grounded (self-standing), the walking type management machine can be stably supported by the auxiliary wheel body 40 and the left and right wheels 2. That is, the auxiliary wheel body 40 can be used as a so-called stand (the auxiliary wheel body 40 itself can play the role of a stand). Therefore, it is not necessary to provide a stand separately, the number of parts can be reduced, and the manufacturing cost can be reduced.

  When traveling on the road or the like, the downward adjustment length of the height adjustment rod 43 from the holder bracket 41 is raised to the shortest state against the elasticity of the compression spring 53, and then the height adjustment rod 43 is attached to the holder. What is necessary is just to hold | maintain the auxiliary wheel body 40 and the residual tilling processing board 54 in the state which does not contact | ground, set to the bracket 41 so that a descent | fall cannot be carried out.

(4). Others The present invention is not limited to the above-described embodiment, and can be embodied in various forms. For example, the raising / lowering adjustment mechanism of the auxiliary wheel body 40 may use, for example, a feed screw. The damper means is not limited to the compression spring 53, and various types such as an air cylinder, a hydraulic type, and a torsion bar type can be adopted. Further, the auxiliary support body is not limited to the above-described auxiliary wheel body 40, and a warped member may be used. The wheel 2 is not limited to a pair of left and right, but may be a single wheel. The power source is not limited to the engine 7 but may be an electric motor or the like. In addition, the configuration of each unit is not limited to the illustrated embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Airframe 2 Wheel 3 Tillage mechanism 4 Steering handle 6 Airframe frame 9 Axle 16 Tillage claw 17 Rear frame 18 Rotary cover 20 Horizontal cover 40 Auxiliary wheel body 41 Holder bracket 43 Height adjustment rod 44 Pivoting bracket 47 Axle 48 Auxiliary wheel 53 Compression spring 54 as damper means

Claims (3)

Walking-type management comprising a power source mounted on the aircraft, a traveling unit and a tilling mechanism arranged side by side below the aircraft, and a steering handle provided on the upper portion of the aircraft so that the direction can be changed. Machine,
An auxiliary wheel body that contacts the ground and supports the airframe together with the traveling portion at the end of the airframe opposite to the tilling mechanism across the traveling portion when traveling with the tilling mechanism forward. Is attached to be adjustable up and down,
Walking type management machine. The auxiliary support is provided with damper means for pressing it against the ground.
The walking type management machine according to claim 1. The auxiliary support is detachably attached to a plowing treatment plate for leveling the plowing of the grooved floor between adjacent ridges,
The walking type management machine according to claim 1 or 2.

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