JP2017051183A - Tending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability of a tending machine including an axle driving type tillage device.SOLUTION: A tending machine includes: an engine 3 serving as a power source mounted on a machine body comprising a machine body frame 2 and a transmission case 4 or the like; a tillage device 10 serving also as a travel device driven by the engine 3; an operation handle 8 extended to a rear part of the machine body; and a resistance device 40 arranged in a rear part of the tillage device 10 and exerting resistance force to a forward motion of the machine body by being plunged into a soil. The resistance device includes in a travel direction of the machine body at least a first resistance rod 41 and a second resistance rod 42. At least a tip of the second resistance rod 42 is located in a rear part of an attachment base part of the resistance device 40 and is extended downward in a vertical direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a technology of a resistance device that imparts running resistance by projecting a resistance bar downward from the rear part of a machine body in a walking type management machine in which tilling claws are arranged on an axle so that running and tilling can be performed simultaneously.

Conventionally, an engine is installed on the machine frame at the center of the machine body of the management machine, a mission case is arranged in the vertical direction at the rear of the engine, and a tilling shaft that also serves as an axle is supported horizontally in the horizontal direction at the bottom of the mission case A management machine is known in which a plurality of tilling claws are fixed to the tilling shaft, a resistance bar protrudes rearward and downward from the rear part of the transmission case, and resistance is applied by the resistance bar when moving forward to enable tilling work. Yes. Further, a technique is known in which the resistance rod has a bifurcated tip, the tilling shaft is rotated by the power of the engine, and the tilling operation can be performed while applying running resistance by the resistance rod. (For example, refer to Patent Document 1).
The resistance bar of the conventional management machine can change the resistance force according to the type of the work machine, the soil quality, the working conditions, etc., loosen the base mounting bolts, and view the bifurcated resistance bar from the rear It can be fixed by rotating in a horizontal state or a vertical state.

  In addition, the base of the resistance rod is attached and supported near the base of the handle, the tip of the resistance rod is positioned in front of the base, and an intermediate portion of the tip is provided in front of the handle base. Follow the lower end of the circumference rotation locus with a slight gap, bend the leading end of the resistance rod backward and place it on the ground, and then place the base at the rear of the tip of the resistance rod. As for the area under the vertical line, a technique in which a secondary resistance bar is provided in front of this is known (see, for example, Patent Document 2).

Utility Model Registration No. 2588129 No. 1-40403

However, in the resistance bar as in Patent Document 1, when the work is performed in such a manner that the two resistors are grounded in order to increase resistance, the right and left resistors have different grounding resistances. The advancing direction of the fuselage is bent to the side where the resistance is large, a large force is required to correct the advancing direction, and fatigue is also increased. In addition, when the resistance bar is mounted vertically, the resistance bar is mounted in a horizontal Y shape when viewed from the side. If the resistance bar is lowered to deepen the tilling depth, the tilling device in front may rise. The operation is opposite to the desired operation, making it difficult to work.
Moreover, in the resistance rod and the secondary resistance rod as in Patent Document 2, the tip is inclined backward. That is, since it is not perpendicular to the ground, it is difficult to enter the soil. Therefore, in the tilling work of hard soil, the resistance rod did not enter deeply and the resistance was reduced, and only shallow tilling work was possible. Further, since the resistance rod and the auxiliary resistance rod are arranged in front of the mounting base portion, the stability is poor and the airframe easily falls backward.

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
That is, in claim 1, a power source mounted on the airframe, a tilling device that also serves as a traveling device driven by the power source, an operation handle that extends behind the airframe, and a rear of the tilling device. Is a management machine comprising a resistance device that pierces the soil and provides resistance to the forward movement of the aircraft, the resistance device comprising at least a first resistance rod and a second resistance rod along the direction of travel of the aircraft, At least the tip of the second resistance rod is disposed behind the attachment base of the resistance device and extends downward in the vertical direction.

According to a second aspect of the present invention, at least the tip of the first resistance rod protrudes obliquely forward and downward.
According to a third aspect of the present invention, the height of the ground of the tip of the first resistance rod and the tip of the second resistance rod is the same, or the first resistance rod is arranged higher.
According to a fourth aspect of the present invention, a stepping portion for piercing the resistance rod is provided in a vertically middle portion of the resistance rod arranged behind the attachment base.

As effects of the present invention, the following effects can be obtained.
Conventionally, sudden advancement (so-called a dash) may occur when hard soil is reached during forward tillage work, but the first resistance rod on the front side hits the hard soil immediately after the tilling device passes through the hard soil. Therefore, it was possible to give resistance to the start and prevent the generation of dashes. Further, since the second resistance rod is located behind the attachment base, the handle operation can be pierced into the soil with a small stroke operation. Further, since the plurality of resistance bars are arranged in the front-rear direction, the straight traveling performance can be improved, and the forward resistance is larger than that of a conventional resistance bar, and can be deeply cultivated easily. Furthermore, since the resistance device is provided with a stepping portion, the resistance rod can be easily pierced even in a hard field.

The whole side view of a management machine provided with the resistance device of the present invention. The perspective view of a resistance apparatus. The side view which shows 2nd embodiment of a resistance apparatus. The side view which similarly shows a working state. The whole side view of the management machine which shows other embodiment which provided the stepping part in the resistance apparatus. The perspective view which shows the other Example of a step-down part. The whole side view of the management machine equipped with the resistance device of a third embodiment. The side view of the resistance apparatus of 3rd embodiment. The top view of the resistance apparatus of 3rd embodiment. The side view which shows the other Example of 3rd embodiment.

Next, an embodiment of the management machine 1 including the resistance device 40 of the present invention will be described. Note that the F direction is assumed to be the front.
In FIG. 1, a management machine 1 has an engine 3 mounted on a body frame 2, and a mission case 4 is erected at the center of the left and right sides of the body frame 2 at the rear of the engine 3. The transmission case 5 is disposed between the three, so that power can be transmitted. A tilling shaft 6 is horizontally mounted in the horizontal direction in the lower part of the transmission case 4, that is, a tilling shaft 6 is provided orthogonal to the F direction as a traveling direction, and the tilling claws 7, 7 are placed on the tilling shaft 6. Are fixed in a radial pattern to constitute the tilling device 10.

  The base of the operation handle 8 is fixed to the upper part of the mission case 4 which is the rear part of the machine body. The operation handle 8 protrudes obliquely rearward and upward, and a grip is formed on the rear part of the operation handle 8 so that the operator can A clutch lever, an accelerator lever, and the like are disposed in the vicinity of the grip. A fuel tank 9 is disposed on the engine 3. Further, a resistance device 40 of the present invention is provided at the rear part of the body frame 2.

Next, the resistance device 40 which is a main part of the present invention will be described in detail.
As shown in FIGS. 1 and 2, the resistance device 40 includes a first resistance bar 41 and a second resistance bar 42, and the first resistance bar 41 is formed of a linear round bar and is fixed to the upper part. The pin hole 41a is opened, and the upper portion of the first resistance rod 41 is inserted into the hitch 15 provided at the rear part of the body frame 2 and fixed by the fixing pin 16. However, the fixing structure is not limited, and may be fastened and fixed at an arbitrary height by a bolt, or may be configured to be rotatably supported around the axis of the first resistance rod 41.

  The first resistance rod 41 extends substantially perpendicularly from the rear end of the body frame 2. In other words, the tilling claw 7 of the management machine 1 is grounded to the ground (horizontal plane), and the machine frame 2 is fixed to the machine frame 2 so that the lower end of the first resistance rod 41 is grounded in a substantially horizontal direction. The In other words, the attachment base 41c at the upper end of the first resistance bar 41 is attached to the hitch 15 at the rear end of the body frame 2 and extends downward in the vertical direction.

  The second resistance rod 42 is formed by bending a round bar into a substantially V shape, one end (front end) is fixed to the rear surface of the middle portion of the first resistance rod 41 by welding or the like, and the rear portion (tip) is It extends downward in the vertical direction and is configured such that the lower end is grounded. Thus, the first resistance rod 41 and the second resistance rod 42 are configured in a substantially “h” shape in a side view, and the distal end (lower end) of the second resistance rod 42 is disposed behind the attachment base 41c of the resistance device 40. It extends downward in the vertical direction. The lower end height (the height to the tip of the ground) when the second resistance rod 42 is grounded and the lower end height (the height to the tip of the ground) of the first resistance rod 41 are matched. In this way, the management machine 1 can be made independent by the tilling device 10 and the resistance device 40 in a stable state. The diameters of the second resistance rod 42 and the first resistance rod 41 are the same. One or more resistance rods are further provided in front of the first resistance rod 41, behind the second resistance rod 42, or between (or behind) the first resistance rod 41 and the second resistance rod 42. It is also possible to arrange in parallel to increase the resistance.

  Furthermore, on the upper part of the second resistance rod 42 located behind the first resistance rod 41 (or the mounting base 41c), a foot can be placed so that the resistance device 40 can be easily inserted into the soil. A stepping portion 43 having a size can be provided. In this embodiment, the stepping portion 43 is fixed on the rear portion of the inclined portion of the second resistance rod 42 so as to be a left-right surface. Further, as shown in FIG. 5, the rod body is bent into a substantially crank shape when viewed from the side to form one resistance rod 41, and the attachment base at the upper end is fixed to the rear end of the body frame 2. It is also possible to adopt a configuration in which the stepped-on portion 43 is fixed to the portion so as to be a surface in the left-right direction. In this case, the same effect as that obtained when the stepping portion 43 is provided on the second resistance rod 42 can be obtained. However, the resistance bar 41 may be linear or curved as long as the resistance bar 41 is formed of a single bar and the tip is directed downward, and the shape is not limited. In addition, as shown in FIG. 6, the stepping portion 43 crushes the inclined portion of the second resistance rod 42 (or one resistance rod 41) in the vertical direction to form a flat portion, and this flat portion is used as the stepping portion 43. It is also possible to configure integrally.

  Further, the fixing position of the stepping portion 43 is not limited, and can be fixed to the rear surface of the vertical portion of the second resistance rod 42 or fixed to the upper rear surface of the first resistance rod 41. Further, the stepping portion 43 can be fixed by a bolt 44 (FIG. 5) or the like so that it can be removed or replaced with another shape of the stepping portion 43 when unnecessary. . In addition, a plurality of bolt holes are provided in the longitudinal direction for replacement, or the bolt 44 is loosened as a configuration to be tightened by the bolt 44, and the mounting position, mounting angle, etc. of the stepping portion 43 are changed, so that the worker's stride, etc. It is also possible to make it easier to step on.

  In such a configuration, when performing the tilling work, the operation handle 8 is pushed downward at the work start position, and the lower end of the resistance device 40 is pierced into the soil. At this time, if the soil is hard and cannot be easily stabbed only with the force of the hand, the foot is placed on the stepping-in portion 43 and stepped on and pierced. In this state, the tilling shaft 6 is rotated to drive the tilling claw 7 into the soil so that the tilling work can be performed. In a state where the resistance device 40 is pierced deeply so that the machine body does not move forward, the tilling device 10 is rotationally driven on the spot, so that the tilling device 10 can be deeply cultivated, and the soil mass can be crushed more finely by rotating more.

  At this time, since the two resistance rods of the first resistance rod 41 and the second resistance rod 42 are pierced into the ground, the advance resistance force becomes larger than before, and the operation handle 8 is pushed down to adjust the advance resistance. The force to do is reduced than before. In particular, when the soil is hard or there is a lump, sudden start, a so-called dash may occur. At this time, the lower end of the first resistance bar 41 hits the lump immediately after the tilling device 10 passes the lump. Therefore, sudden start can be suppressed instantaneously. Further, the second resistance rod 42 is disposed at an appropriate interval behind the first resistance rod 41 so that a resistance force is generated in the first resistance rod 41 and the second resistance rod 42. Then, the first resistance bar 41 is located near the tilling shaft 6 that is the pivot point of the operation handle 8, and by the lever principle, the first resistance bar 41 can be stabbed with a smaller pressing force than the conventional one. Will improve.

  Further, when the first resistance rod 41 and the second resistance rod 42 are arranged on the left and right sides at the same position in the front-rear direction as in the prior art, the left and right when the difference between the left and right resistance forces occurs. Although the advancing direction may have changed, in this embodiment, the first resistance rod 41 and the second resistance rod 42 are arranged in parallel in the front-rear direction at the center of the left and right of the machine body, so the resistance force in the left-right direction during forward movement is the same Therefore, straight running performance is improved.

  Then, when moving forward from the tillage state where the advancement is stopped, the operation handle 8 is slightly lifted to slightly raise the first resistance bar 41 and the second resistance bar 42 to reduce the forward resistance, Thus, tilling work can be performed while adjusting the vertical height of the operation handle 8 and adjusting the tilling depth and the size of the soil mass.

  Moreover, the lower part of the 1st resistance rod 41 and / or the 2nd resistance rod 42 can be made into the shape of a point, can be made thin, or one can be protruded below long. That is, the second embodiment will be described with reference to FIGS. The grounding portion 41b below the first resistance rod 41 is formed in a pointed shape with a downward point, and the downward protruding length of the first resistive rod 41 is longer than the downward protruding length of the second resistive rod 42. Make up long. By configuring in this manner, as shown in FIG. 4, even when the farm scene is hard, when the operation handle 8 is pushed down and the resistance device 40 is pierced into the ground, the first resistance configured in a point shape is used. The stick 41 can easily enter the ground, and it is not necessary to step on it with your foot. And since the 1st resistance rod 41 is pierced in the hard soil, even if it operates the tilling apparatus 10, it does not start suddenly.

If the tilling operation is performed while moving forward with the front first resistance rod 41 pierced in the soil, the rear second resistance rod 42 is likely to enter the crack formed by the first resistance rod 41 as it advances. As a result, continuous work can be easily performed, uncultivated land at the rear of the mission case 4 can be treated, and residual tillage can be eliminated. In addition, since the possibility that the lower end of the second resistance rod 42 on the rear side has a pointed shape may be pressed against the operator's foot, it is preferable that the rear side is not configured to have a pointed shape.
Further, the lower end height of the first resistance rod 41 (the height of the tip to the ground) can be arranged higher than the lower end height of the second resistance rod 42 (the height of the tip to the ground). In this case, when the operation handle 8 is pushed down during normal tillage work, if the height of the lower end of the first resistance bar 41 is lower than the lower end of the second resistance bar 42, the first resistance bar 41 mainly gives resistance. The second resistance rod 42 hardly gives resistance and has a low presence value. However, the lower end height of the first resistance rod 41 is set higher than the lower end height of the second resistance rod 42, so that the operation handle 8 can be moved. When pushed down, the second resistance rod 42 enters deeper into the soil than the first resistance rod 41, and the second resistance rod 42 mainly provides resistance during tillage. The first resistance rod 41 is not inserted deeply, but provides resistance in a hard field and can prevent a dash. Moreover, when a dash occurs, the first resistance rod 41 on the front side hits the hard soil immediately after the tilling device 10 passes through the hard soil, and can prevent the occurrence of a dash by giving resistance to sudden start. The resistance makes it possible to cultivate hard parts.

Next, the resistance device 50 according to the third embodiment will be described with reference to FIGS. 7, 8, and 9.
The resistance device 50 includes a first resistance rod 51, a second resistance rod 52, tail wheels 53 and 53, and a mounting bracket 54.
The mounting bracket 54 includes a columnar mounting base 54a that is mounted on the hitch 15, a support boss 54b that mounts the rotating shaft 57, the first resistance rod 51, and the like, and a connecting body 54c that connects the mounting base 54a and the support boss 54b.

  The mounting base 54a has a cylindrical shape with a pin hole 54d opened at the top thereof, and the mounting base 54a is inserted into a cylindrical portion formed at the rear of the hitch 15 so that one of the plurality of pin holes opened in the hitch 15 The pin holes 54d are aligned at a desired height and can be fixed by the fixing pins 16. That is, the height of the resistance device 50 can be adjusted according to the tilling depth. A predetermined difference (gap) is provided between the outer diameter of the fixed pin 16 and the inner diameter of the pin hole 54d. That is, the diameter of the fixing pin 16 is made smaller than the inner diameter of the pin hole 54d so as to have a backlash.

  By comprising in this way, the 1st resistance rod 51 and the 2nd resistance rod 52 which are attached to the attachment bracket 54 can be rotated a little to the left and right by the backlash angle, and even if it hits a stone or hard aftergrowth It is possible to prevent the finish from being disturbed by rotating to the right or left so as not to run away and stop traveling, so that there is no difference in tilling depth.

  A plate-like connecting body 54c protrudes obliquely upward from the lower end of the mounting base 54a, and the front lower surface of the support boss 54b is fixed to the rear end of the connecting body 54c. The axis O1 of the support boss 54b is inclined obliquely downward in the front-rear direction. Locking means 60 for fixing the first resistance rod 51 at a predetermined angular position is provided on the side surface of the support boss 54b.

  The locking means 60 comprises a support 61, a lock pin 62, and a spring 63. The support 61 bends the plate into a "U" shape, and the open side is fixed to the side surface of the support boss 54b, and the closed side is the side. The lock pin 62 is inserted from the side so that the support boss 54b and a rotating shaft 57 described later can be passed through and fixed. A spring 63 is externally fitted to the lock pin 62 in the support body 61 to urge the lock pin 62 toward the support boss 54b (lock side). However, the configuration of the lock means 60 is not limited, and the support boss 54b and the rotary shaft 57 may be fixed with bolts or the like.

A rotation shaft 57 that supports the first resistance rod 51, the second resistance rod 52, and the tail wheel 53 is rotatably inserted into the support boss 54 b of the mounting bracket 54, and the rotation shaft 57 is predetermined by the lock means 60. It is fixed at the angular position. That is, a pin hole is opened in the diameter direction in the rotation shaft 57, and the lock pin 62 can be inserted and fixed after the rotation shaft 57 is inserted into the support boss 54b.
It should be noted that a predetermined difference is provided between the inner diameter of the pin hole of the rotating shaft 57 and the outer diameter of the lock pin 62 and is fixed with backlash. That is, the outer diameter of the lock pin 62 is made smaller than the inner diameter of the pin hole of the rotating shaft 57 so that the first pin 50 and the second rod 52 can be rotated to the left and right. . Thus, as described above, the first resistance bar 51 and the second resistance bar 52 can be prevented from rotating and moving to the right or left to stop running even if they hit a stone or hard plowing, and the mounting base The backlash of the two places of 54a and the rotating shaft 57 expands the range which can escape further than before, the residual tillage processing performance improves, and it can prevent that driving | running | working stops.

A base side of the first resistance rod 51 is fixed to the rear end of the rotating shaft 57 so as to be orthogonal to each other. Established. That is, the first resistance bar 51 is attached so as to protrude obliquely forward and downward from the rear portion of the mounting bracket 54, and one end (front end) is an insertion portion into the soil, and is positioned forward and lower than the attachment portion of the hitch 15. However, the structure is easy to pierce into the ground when moving forward. However, as shown in FIG. 10, the first resistance rod 51 can be arranged in the vertical direction so that only the tip protrudes obliquely forward and downward.
The second resistance rod 52 protrudes rearward and downward from the middle portion of the first resistance rod 51 in the longitudinal direction. The second resistance rod 52 is formed by bending the rod body into a substantially V shape in a side view, and the lower portion extends downward in the vertical direction. That is, the lower tip portion of the second resistance rod 52 is configured to face in the vertical direction.

  The other end (upper end) of the first resistance rod 51 is a tail wheel frame 58, and an axle 55 is horizontally provided at the tip of the tail wheel frame 58 in the left-right direction. In the present embodiment, the tail wheel frame 58 and the first resistance rod 51 are integrally formed on an extension of one rod body, but may be configured by different members. On both sides of the axle 55, tail wheels 53 and 53 are rotatably supported. A mounting plate 56 for mounting the earthenware 70 is fixed to the left and right center of the axle 55. Note that the cultivator 70 or the tail wheel 53 may not be provided, and the tail wheel 53 may be a single wheel.

  In such a configuration, in a state where the rotary shaft 57 is fixed so that the first resistance rod 51 and the second resistance rod 52 face downward, the first resistance rod 51 and the second resistance rod 52 are in the soil during the tilling work. The field is plowed by rotating the tilling claws 7, 7. And, in the conventional configuration in which the first resistance rod 51 is inclined in the vertical direction or rearwardly downward, the first resistance rod 51 escapes upward when a hard part is reached. When the 1 resistance rod 51 is configured to protrude obliquely forward and downward, the dash can be prevented because it moves forward into the soil even if it reaches a hard field.

When the tilling claws 7, 7... Are rotating but cannot move forward, the first resistance rod 51 can be rotated to the right or left by the backlash and can move forward. In this way, it is possible to prevent the work from being interrupted and further increasing the working depth.
When moving in a non-working state, pull out the lock pin 62 to release the lock, rotate 180 degrees around the rotation shaft 57 so that the tail wheel 53 is positioned downward, and insert the lock pin 62 and fix it again. The resistance device 50 can be switched from the working position to the moving position. At this moving position, the operation handle 8 is lowered, the tilling device 10 is lifted from the ground surface, and only the tail wheel 53 is grounded, so that the tail wheel 53 can be easily moved.

  As described above, the engine 3 as a power source mounted on the airframe including the airframe 2 and the mission case 4, the tilling device 10 also serving as a traveling device driven by the engine 3, and the rear of the airframe are extended. A management machine 1 including an operation handle 8 to be operated and a resistance device 40/50 which is disposed behind the tilling device 10 and which pierces the soil and imparts a resistance force to the forward movement of the machine body. Includes at least first resistance rods 41 and 51 and second resistance rods 42 and 52 along the traveling direction of the fuselage, and at least the tips of the second resistance rods 42 and 52 are located behind the mounting bases 41 c and 54 a of the resistance device 40. And is extended downward in the vertical direction, so when the tilling device 10 reaches the hard soil during the tilling work, the advancing speed suddenly increases, but the hard part Since striking the soil first resistor bars 41, 51 of the front side hard immediately after passing through the, giving resistance to rapid advance can prevent the generation of dash became possible tillage of rigid portion by the resistance. Moreover, since the 2nd resistance rod 42 * 52 is located back rather than the attachment base part 41c * 54a, operation of the operation handle 8 can be stabbed in soil by operation of a small stroke. Since the two first and second resistance rods 41, 51, 42, 52 or three or more resistance rods are arranged in the front-rear direction, the straightness can be improved, and the forward resistance is higher than that of a single resistance rod. The operation of increasing the resistance force by depressing the operation handle 8 is reduced and the operability is improved. Further, since the two first and second resistance bars 41, 51, 42, and 52 are positioned in the front-rear direction at the center of the left and right, the left and right resistance force does not change, and the straightness is improved.

  In addition, since at least the tip of the first resistance bar 51 protrudes obliquely forward and downward, the first resistance bar 51 bites in during advance (becomes easy to bite), and when it reaches hard soil, the first resistance bar 51 It is possible to prevent 51 from sticking to a hard part and floating and dashing. Moreover, it becomes easy to stab and crush the residual tillage.

  In addition, since the tip of the first resistance rods 41 and 51 and the tip of the second resistance rods 42 and 52 have the same ground height or the first resistance rods 41 and 51 are arranged higher, normal tilling is performed. During operation, when the operation handle 8 is pushed down, the second resistance bars 42 and 52 enter deeper into the soil than the first resistance bars 41 and 51, and the first resistance bars 41 and 51 provide meaningless resistance. Can be avoided. That is, when the first resistance rods 41 and 51 enter the soil deeper than the second resistance rods 42 and 52, the role of the second resistance rods 42 and 52 is reduced, and the value of existence is also reduced. By constructing the rods 42 and 52 so as to enter deeper than the first resistance rods 42 and 51, the second resistance rods 42 and 52 provide resistance when plowing, and the first resistance rod 51 has a function of preventing a dash. And each can be effectively operated.

  In addition, since a stepping portion 43 for piercing the resistance rod is provided in the middle of the upper and lower portions of the resistance rod arranged behind the mounting base portion 41c, even if it is hard soil, the foot is pushed into the stepping portion 43. By placing and stepping on, the first resistance rods 41 and 51 and the second resistance rods 42 and 52 can be easily stabbed into the field, and the operability can be improved.

2 Machine frame 3 Engine 4 Mission case 8 Operation handle 10 Tillage device 40 Resistance device 41/51 First resistance rod 41c Mounting base 42/52 Second resistance rod 43 Depressed portion

Claims (4)

  A power source mounted on the airframe, a tilling device that also serves as a traveling device driven by the power source, an operation handle that is extended to the rear of the airframe, and a rear of the tilling device that is inserted into the soil and pierced into the soil. A management machine including a resistance device that applies resistance to forward movement, wherein the resistance device includes at least a first resistance bar and a second resistance bar along a traveling direction of the machine body, and at least a tip of the second resistance bar is A management machine, which is arranged behind the attachment base of the resistance device and extends downward in the vertical direction.   The management machine according to claim 1, wherein at least a tip of the first resistance rod protrudes obliquely forward and downward.   The tip of the first resistance rod and the height of the ground of the tip of the second resistance rod are the same, or the first resistance rod is disposed higher. Management machine.   The stepping part for piercing the said resistance rod is provided in the up-and-down middle part of the resistance rod arrange | positioned behind the said attachment base part, The Claim 1 thru | or 3 characterized by the above-mentioned. Management machine.

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