JP2017175983A - Walking type management machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a walking type management machine that automatically performs deep tillage preventing dashing, and can efficiently perform a predetermined tillage without the rolling of a handle part or reducing the insertion depth of a resistance bar.SOLUTION: A resistance bar device 1 of a walking type management machine A is configured by: pivotally supporting the upper side of a resistance bar 20 by regulating lateral direction swing and making longitudinal turning freely, to a support rod 21 mounted to a holder 2b, through a mounting shaft 26 at a lower end of the support rod 21; also, providing a stopper 21b for regulating a backward turning upper limit position of the resistance bar 20 for performing backward turning by soil resistance in tilling traveling; and providing a spring 28 for turning and biasing the resistance bar 20 toward the vertical direction from the backward turning upper limit position.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a resistance rod of a walking management machine.

2. Description of the Related Art Conventionally, a cultivating unit that cultivates engine power by rotating a cultivating shaft having a cultivating claw through a power transmission mechanism, a walking steering type handle unit that extends rearward above the cultivating unit, and power transmission 2. Description of the Related Art A walking type management machine is already known which includes a machine frame connected to a mechanism and a resistance bar device provided with a resistance bar which is supported by a holder at the rear of the machine frame and can be inserted into soil. (For example, Patent Document 1)
The above walking-type management machine adjusts the insertion depth of the resistance bar into the soil by raising and lowering the handle during plowing work, and changes the resistance that the resistance bar receives from the soil. I am trying to make adjustments. In other words, when the insertion depth of the resistance rod into the soil is increased, the traveling speed can be slowed and the number of rotations per unit area of the soil by the tilling claw can be increased to break up the soil finely and increase the tilling depth at the same time. In addition, when the insertion depth of the resistance rod into the soil is made shallower, the traveling speed can be increased and the cultivation depth can be made shallower while the soil is roughly crushed.
In addition, the resistance rod device includes a support rod (attachment portion) attached to the machine body, a resistance rod (insertion portion) that can be inserted into the soil, a lower portion of the support rod and an upper portion of the resistance rod, a coil spring, a leaf spring, etc. By connecting with a spring (elastic part), the resistance rod inserted into the soil during tillage work is freely movable with respect to the support rod by deforming the spring according to the insertion resistance state.

JP 2009-183190 A

The walking-type management machine provided with the resistance bar device disclosed in Patent Document 1 is configured such that when a hard object such as a stone or a tree root in soil or a hard soil mass contacts the tip side of the resistance bar during a tilling work, the spring is buffered. It functions as a material to reduce the shocking jump of the handle part, suppress the disturbance of the body posture, reduce the fatigue of the worker due to the impact, and when the obstacle such as a relatively small stone in the soil hits, There is an advantage of avoiding the obstacle of the resistance rod by deformation.
However, in this resistance bar device, when starting the tilling work in the uncultivated predetermined tillage area, the operator pushes down the handle part and enters (inserts) the resistance bar deeply into the ground to operate the clutch and perform the initial tillage work. When a hard resistor or hard ground in the ground becomes a large insertion resistance (soil resistance), the spring is deformed and the resistance bar is released to one side as a result, and the handle part swings sideways to the other side. In this case, the lowering of the resistance rod tip causes plowing with a shallow insertion depth at the tip of the resistance rod, so that the machine body is likely to cause dashing due to insufficient soil resistance of the resistance rod at the beginning of tillage.
Furthermore, the walking type management machine comprising an omnidirectional spring-supported resistance rod having a spring that can be deformed in all directions is locally in the middle of normal forward tillage where forward tillage is performed at a predetermined depth from the initial tillage. Or, when deep plowing is continuously performed, the operator pushes down the handle portion with the forward walking stopped, but the resistance rod also has a large soil resistance and the spring deforms and the resistance rod is Since the handle is released to one side, the incorrect operation of the steering wheel swinging downward causes the resistance rod insertion depth to be insufficient, making it difficult to deeply plow as needed, and improving the straightness of the aircraft. There is a problem that makes the obstruction tillage work inefficient.

In order to solve the above-described problems, the present invention includes a cultivating unit 10 that rotates a cultivating shaft 9 having a cultivating claw 10a by engine power to cultivate, and a handle unit 11 that extends rearward above the cultivating unit 10. And a resistance rod device 1 including a body frame 2 connected to a power transmission mechanism for transmitting engine power and a resistance rod 20 supported by a holder 2b at the rear of the body frame 2 and freely inserted into soil. In the management machine,
With respect to the support rod 21 attached to the holder 2b, the resistance rod device 1 is controlled in the front-rear direction by restricting the swinging of the upper side of the resistance rod 20 in the left-right direction via the attachment shaft 26 at the lower end of the support rod 21. A stopper 21b is provided for defining a rearward rotation upper limit position of the resistance bar 20 that is pivotally supported and pivoted backward due to soil resistance during tillage traveling, and the resistance bar 20 is moved from the rearward rotation upper limit position. A feature is that a spring 28 is provided that is urged to rotate in the vertical direction.

According to the first aspect of the present invention, the resistance bar device including the resistance bar supported by the holder at the rear of the machine body frame of the walking type management machine and freely inserted into the soil is provided for the support rod attached to the holder. A resistance rod that pivots back and forth due to soil resistance during plowing while supporting the upper side of the resistance rod in the lower end of the rod through the mounting shaft so that the swinging in the left-right direction is restricted and the rotation in the front-rear direction is free. By providing a stopper for restricting the rearward rotation upper limit position and providing a spring for biasing the resistance rod in the vertical direction from the rearward rotation upper limit position,
When lifting the handle part, the resistance bar makes the insertion part vertical due to the tension of the spring, so that the resistance bar can be quickly brought to the desired insertion depth by lowering the handle part. Dashing can be reliably prevented, and the transition from initial tillage to normal forward tillage at a predetermined depth can be made smooth. Then, the resistance of the resistance rod is rotated backward with the mounting shaft as a fulcrum against the spring and is fixed at the position where it comes into contact with the stopper due to the soil resistance accompanying the forward movement of the aircraft while preventing dashing. Supports through the stopper and the horizontal shaft without releasing the side pressing force to the side, deep plowing is possible, and the resistance rod rotates forward by the spring force when the soil resistance becomes weak In addition, since it is biased to a vertical posture, deep plowing that prevents dashing can be performed automatically.
In addition, even if the resistance bar receives a large lateral force from the handle portion or due to contact with a hard object in the soil, the resistance rod swings in the left-right direction via the horizontal mounting shaft at the lower end of the support rod. Therefore, it is possible to efficiently perform a predetermined tillage work without reducing the lateral deflection of the handle portion and the insertion depth of the resistance rod.

It is the whole left view which shows the walk type management machine provided with the resistance rod apparatus to which this invention is applied. It is a top view of FIG. The configuration and action of the resistance bar device are shown, (a) is a side view showing the insertion posture of the resistance rod, and (b) is a side view showing the normal tillage resistance posture of the resistance rod. The structure of a fuel tank is shown, (a) is a side view of a fuel tank, (b) is a sectional side view of (a).

An embodiment of the present invention will be described with reference to the drawings. 1 and 2, reference symbol A is a walking type management machine provided with a resistance rod device 1 according to the present invention. This walking type management machine A has an engine 3 mounted on the front part of a body frame 2 having a bumper 2a. A fuel tank 5 having the configuration described later is installed by covering the rear of the engine 3 with a bonnet 3a. A belt transmission mechanism 6 is covered with a side transmission cover 7 on the left side of the engine 3.
The engine 3 is an internal combustion engine type prime mover in the embodiment, but may be an electric prime mover such as a motor.

  A drive case 8 that is input and transmitted by the belt transmission mechanism 6 is attached to an intermediate part in the front-rear direction of the machine body frame 2 in a rearwardly inclined manner. 9 is supported, and a plurality of tilling claws 10 a are attached to the tilling shaft 9 to constitute the tilling portion 10. As a result, the walking-type management machine A sends the engine power to the belt transmission mechanism 6 and a series of power transmission mechanisms provided in the drive case 8 when the clutch lever 12 provided on the handle portion 11 is turned on (operation). It is transmitted to the tilling shaft 9. Thereby, the tilling part 10 can plow the soil by rotating the tilling claw 10a in the direction of the arrow.

  As shown in FIG. 1 and FIG. 2, the walking steering type handle unit 11 corresponds to the front frame of the left and right handle frames 13 corresponding to the handle frame base 15 and the distance between the rear end grips 13a corresponding to the human physique. It is attached via a width adjustment mechanism that makes it adjustable, so that it can be adjusted according to the physique of the person. That is, the handle portion 11 has a handle joint 17 attached to the upper portion of the drive case 8 so that the handle joint 17 is vertically adjustable by a lateral knob bolt 16a with respect to a handle frame base portion 15 that is attached to the upper portion of the drive case 8 by a vertical knob bolt 16. Then, with the front end of each handle frame 13 aligned with the joint portion of the handle joint 17, a vertical knob bolt 18 is screwed into the both so that the left and right handle frames 13 can be rotated about the knob bolt 18 as a fulcrum. The middle part of the left and right handle frames 13 is connected via an adjustment operation part 19.

  The adjustment operation unit 19 rotatably supports the adjustment cylinder 19a on one handle frame 13 via a knob bolt 18a, and supports the adjustment bar 19b on the other handle frame 13 via a knob bolt 18a. The adjusting cylinder 19a is slidably inserted at the tip of the adjusting bar 19b, and both are fixed by adjusting bolts 19c provided on the adjusting cylinder 19a. As a result, when the adjustment bolt 19c is tightened at a desired position in which the left and right handle frames 13 are turned inwardly with the knob bolt 18 as a fulcrum while the adjustment bolt 19c is loosened, the grip interval is narrowed to adapt to women and women with narrow shoulders. If the adjustment bolt 19c is fastened with the grip interval widened by a similar procedure, it can be adapted to an operator with a wide shoulder width.

  In the vicinity of the handle grip 13, an operation unit such as a clutch lever 12 that enables operation of each part of the walking type management machine 1 is installed, and the operation unit is operated to start and stop rotation of the tilling claw 10. In addition to being able to adjust the rotation speed, etc., by holding the handle grip 13 and operating the handle, it is possible to maintain the attitude of the aircraft and adjust the tillage depth using the resistance rod 20 of the resistance rod device 1. Yes. That is, the walking type management machine 1 is operated by the handle portion 11.

Next, the resistance bar apparatus 1 will be described in detail with reference to FIGS. The resistance bar device 1 includes a support rod 21 that is fitted and supported in a vertically cylindrical holder 2b provided at the rear of the machine frame 2 so as to be vertically adjustable, and a standing biasing mechanism 22 at a lower portion of the support rod 21. It is comprised from the resistance rod 20 etc. which are attached via.
The support rod 21 forms a bifurcated attachment piece 21a in front of which the upper portion of the resistance rod 20 is nipped in the lower end of the straight shaft portion, and protrudes rearward from the upper portion of the attachment piece 21a. The stopper 21b is provided. This stopper 21b regulates the rearward rotation upper limit position (normal tillage resistance position) of the resistance bar 20 that rotates backward due to soil resistance during tillage travel. The support rod 21 is provided with a plurality of pin holes in the vertical direction in the upper part of the shaft portion for inserting and removing the mounting pins 25 similar to the conventional one. As a result, the support rod 21 is inserted into the holder 2b, and the pin hole of the support rod 21 is selectively inserted into the mounting pin 25 inserted into the pin hole formed in the holder 2b. It can be attached to the upper and lower positions from the standard position shown in FIG. In addition, the attachment means to the body side of the support rod 21 is not restricted to the said means, It can be set as the means using fasteners, such as a volt | bolt, the means using welding.

As shown in FIG. 3, the resistance rod 20 is formed on the lower end side of a round rod-shaped rod body 20a so that an insertion portion 20c inserted into the ground via a downward bent portion 20b has a square shape in a side view. In addition, with the upper end side of the rod main body 20a inscribed in the mounting piece 21a, the mounting shaft 26 is inserted into the both so as to be swingably supported.
In this configuration, the urging / biasing mechanism 22 includes a coil-like spring 28 on a protrusion 27 protruding laterally on the rear upper part of the mounting piece 21 a and a protrusion 27 a protruding on the upper end of the resistance bar 20. Both ends are locked.

  With this configuration, the resistance bar device 1 supports the mounting shaft 26 as a fulcrum as shown by a solid line in FIG. 3A in a free state when no load is applied to the insertion portion 20c when soil resistance (load) is not applied. In addition, by the tension biasing force of the spring 28, the insertion position at the time of initial tillage in which the insertion portion 20c is brought into a substantially vertical position can be obtained. Then, as shown in FIG. 1, the operator pushes down the handle portion 11 from the insertion posture of the resistance bar 20 and pushes the insertion portion 20 c at the time of tilling work performed by rotating the tilling portion 10 in the direction of the arrow and moving the machine body forward. When inserted into the ground, the resistance rod 20 is subjected to soil resistance (plowing rod resistance) by the insertion force and the forward force of the machine body, and rotates backward by the front / rear rotation angle θ with the mounting shaft 26 as a fulcrum. Thus, the tillering resistance posture is kept in the same manner as a conventional resistance bar at the upper limit of the rearward rotation contacting the stopper 21b.

That is, when the resistance rod device 1 lifts the handle portion 11 with the tillage portion 10 as a fulcrum at the start of tilling work and tilts the machine body forward, the resistance rod 20 brings the insertion portion 20c into a vertical state. By the operation of lowering the portion 11, the insertion portion 20c can be inserted smoothly and deeply without requiring a large force. As a result, the resistance bar 20 can easily obtain an initial insertion depth that facilitates initial tillage of a predetermined depth, and the resistance bar 20 becomes a large resistance to reliably prevent dashing of the airframe and start tilling. Make it easier to do.
In the initial tillage as described above, the walking-type management machine A is moved forward by the initial advance distance S while the tiller 10 digs up to a predetermined depth by the rotation of the tillage claw 10a, and the resistance bar 20 has an underground resistance. The normal tillering depth which is regulated by the upper rotation position (normal tillage resistance position) rotated backward by the front and rear rotation angle θ by the rising distance H by the soil resistance during the tillage travel from the initial insertion depth. It is possible to perform normal forward tillage in which the position is balanced with the pressing force of the handle portion 11 and advanced at a predetermined depth.

  In the middle of performing normal forward tillage as described above, when deep plowing is performed locally or continuously, the operator pushes down the handle portion 11 strongly while sequentially stopping forward walking. As a result, the walking-type management machine A applies the push-down force of the handle portion 11 from the support rod 21 through the mounting shaft 26 and the stopper 21b, and the insertion portion 20c of the resistance rod 20 is deeper into the ground than the position shown in FIG. Since the soil resistance, that is, the forward resistance can be increased by insertion, deep tillage can be performed by increasing the number of times of tilling with the tilling claws 10a while slowing down the forward speed of the aircraft as in the conventional case. On the other hand, during the normal forward tillage as described above, when it is desired to increase the forward speed while obtaining a predetermined tillage depth, or when making a quick turn such as making a U-turn, the handle portion 11 By performing a pressing release operation for loosening the pressing force, both the traveling operations can be performed easily and quickly.

  That is, in this case, the spring 28 is rotated downward from the normal tillage resistance posture shown by the solid line in FIG. In order to switch to the insertion tillage resistance posture shown by the solid line in FIG. 3A, the handle portion 11 is urged in the upward rotation direction with the tillage portion 10 as a fulcrum by the turning reaction force of the resistance rod 20 at this time. It will be. Accordingly, the operator can quickly and easily lift the handle portion 11 upward by using the rotational reaction force received through the resistance rod 20, and the depth of the insertion portion 20c is shallow and the running resistance is reduced. And highly efficient tillage can be performed smoothly.

  The walking-type management machine A including the resistance bar device 1 configured as described above causes the engine 3 to rotate at a high speed when starting a tilling work in a predetermined tillage area of the field where the resistance bar 20 has been moved without being grounded. In this state, when the handle 11 is pushed down and the resistance rod 20 is plunged into the ground, the clutch lever 12 is turned on and the tiller 10 is rotated. As described above, the initial tillage work and the normal tillage work preventing the dashing are performed. Can be done. Then, with the resistance rod 20 inserted, the handle portion 11 is operated in the desired direction of front, rear, left and right and up and down from the rear of the machine with the resistance bar 20 and the tiller 10 as a fulcrum, and the machine is tilted and swung right and left. Or move while meandering or turning to perform the continuous tillage work.

  In such a tilling work, first, the initial tilling work is such that when the handle part 11 lifted by the operator is pushed down with the tilling part 10 as a fulcrum, the resistance bar 20 brings the insertion part 20c into a vertical state by the pulling force of the spring 28. Therefore, the insertion portion 20c can be quickly brought to a desired insertion depth in accordance with the operation of lowering the handle portion 11. Therefore, the operator can surely prevent the dashing of the airframe at the initial stage of tilling when the resistance bar 20 tends to be insufficient in soil resistance, and can smoothly shift from the initial tillage to the normal forward tillage at a predetermined depth. it can.

Then, the resistance rod 20 is rotated backward by the front / rear rotation angle θ with the mounting shaft 26 as a fulcrum against the spring 28 due to the soil resistance accompanying the forward movement of the airframe as the tillage claw 10a rotates while preventing dashing. The stopper 21b and the horizontal axis do not release the pressing force on the handle portion 11 side sideways like a conventional omnidirectional spring-supported resistance rod. Thus, the insertion of the resistance rod 20 in the soil can be efficiently deepened and deep plowing can be performed without hindrance.
Next, in a place where the soil resistance of the cultivated soil becomes weak during normal forward tillage performed by moving the aircraft substantially straight forward, deep tillage can be automatically performed to deepen the resistance rod 20 while being in a vertical posture by spring force, In particular, it is possible to facilitate the tilling work in the field of sand or soft ground.

  On the other hand, when performing the initial tillage work and the normal tillage work as described above, and the steering tillage work in which the resistance rod 20 is grounded while swinging while tilting the machine body to the left or right, or cultivating while meandering or turning, When a large depressing operation force is applied from the handle portion 11 side to the insertion portion 20c side of the resistance rod 20, and a hard object such as a stone, a tree root, or a hard earth lump existing in the soil strongly contacts the resistance rod 20 In addition, a large lateral force (lateral movement resistance) is applied to the resistance rod 20.

  In this case, the walking-type management machine A supports the upper side of the resistance bar 20 at the lower end of the support rod 21 by regulating the swinging in the left-right direction via the lateral mounting shaft 26, and soil resistance during tillage running. Since the stopper 21b for restricting the rearward rotation upper limit position of the resistance bar 20 that rotates backward is provided, even if a large lateral force is applied while the rearward rotation upper limit position is maintained, the resistance bar 20 is allowed to escape laterally. Therefore, meandering is suppressed and straight running performance is not impaired. Therefore, it is possible to efficiently carry out the straight-plowing tillage work while preventing the drawbacks such as causing the handle portion 11 to swing sideways as in the conventional case and making the insertion depth of the resistance rod 20 shallow to make predetermined deep tillage difficult. It can be carried out.

  The resistance bar device 1 is configured by putting together a standing biasing mechanism 22 including a spring 28 and the like that pivots and biases the resistance bar 20 from the position of the normal tillage resistance posture in the vertical direction above the mounting shaft 26. As a result, the length and direction of the spring biasing stroke is optimized using the space at the lower rear of the fuselage frame 2 so that the stopper 21b can be compactly provided at a mechanically advantageous position, and is attached as a whole. It has a feature that it can be manufactured with a simple and inexpensive configuration while preventing mud from adhering between the shaft 26 and the body frame 2.

  Next, the fuel tank 5 of the engine 3 will be described with reference to FIG. The fuel tank 5 is provided with an oil supply port 30 for supplying oil to the engine 3 via a pipe at the front part of the tank bottom plate 5a, and an oil sump part 5b recessed downward is formed on the rear side. Thus, for example, when the fuel runs out during the tillage operation, the handle portion 11 is lifted upward, and the body of the fuel tank 5 and the fuel tank 5 are largely inclined forward, whereby the accumulated fuel 31 accumulated in the oil sump portion 5b is removed. The engine 3 can be restarted by moving and supplying to the oil feeding port 30 formed on the front side of the tank bottom plate 5a. Therefore, when the engine is stopped during the tillage operation, the walking type management machine A provided with the fuel tank 5 can be restarted in a short time and can travel to the fuel tank location such as the coastline. There is an advantage that the fuel supply operation to the refueling port 32 can be easily performed without compulsory transportation movement.

A walking type management machine 1 resistance rod device 2 machine frame 2b holder 9 tilling shaft 10 tilling portion 10a tilling claw 11 handle portion 20 resistance rod 20c insertion portion 21 support rod 21b stopper 26 mounting shaft 28 spring

Claims (1)

A cultivating part (10) for cultivating by rotating a cultivating shaft (9) having a cultivating claw (10a) by engine power, and a handle part (11) extending rearward above the cultivating part (10) A body frame (2) connected to a power transmission mechanism for transmitting engine power, and a resistance rod (20) supported by a holder (2b) at the rear of the body frame (2) and freely inserted into the soil. In the walking type management machine consisting of the stick device (1) etc.
With respect to the support rod (21) attached to the holder (2b), the resistance rod device (1) is placed on the upper side of the resistance rod (20) via the attachment shaft (26) at the lower end of the support rod (21). A stopper (21b) that regulates the upper limit position of the backward rotation of the resistance rod (20) that rotates backward by the soil resistance during tillage travel, while restricting the swinging in the left-right direction and pivoting in the front-rear direction. ) And a spring (28) for biasing the resistance rod (20) in the vertical direction from the rearward rotation upper limit position.

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