JP3195621U - Height adjustment device for tillage depth adjustment wheel - Google Patents

Abstract

An apparatus capable of adjusting a height position of a rotary depth adjustment wheel of a rotary from an operating position is provided. In a cultivator having an adjustment wheel 5 for adjusting a tilling depth on the front side of a rotary 3 on the front side of a driving wheel 2 and working with a driving handle 19 on the rear side of the machine body 1, it projects forward from the machine body 1. A cylindrical rod support 7 is fixed vertically at a position on the front side of the rotary member 3 of the support member 4, a rotary connecting body is inserted into the upper portion of the rod support 7, and a lower end portion at the lower portion. And an elevating mechanism that allows the adjusting wheel support rod 6 including the adjusting wheel 5 to be inserted and attached and that the adjusting wheel support rod can be moved up and down by rotation of the rotating connection body between the rotating connection body and the adjusting wheel support rod 6. The base end portion of the outer wire outside the operation wire 9 is fixed to the driving handle 19, the base end portion of the inner wire inside the operation wire is connected to the rotatable operation handle 16, and the end portion of the inner wire is connected to the rotary connection body. Connect to . [Selection] Figure 1

Description

  The present invention relates to an apparatus for adjusting the height position of an adjustment wheel provided to adjust the depth of plowing by a rotary when plowing farmland with a cultivator.

In general, a tiller cultivated with a rotary is provided with an adjustment wheel (also called a tail wheel) for adjusting a height position relative to the rotary before or after the rotary in order to adjust the plowing depth of the rotary.
For example, as shown in FIG. 2, the adjusting wheel has a supporting cylinder body c fixed in a vertical direction on an adjusting wheel support section straddling the rotary, and the adjusting wheel having an adjusting wheel at the lower portion of the supporting cylinder body c. The support rod a is supported so as to be slidable up and down, and is mounted on the airframe so that it can be moved up and down by the rotation of the operation handle b provided on the upper portion of the support cylinder c.

However, a conventional tiller has a rotary on the front side of the drive wheel and is operated on the rear side of the drive wheel. In such a tiller, the adjusting wheel is located in front of the rotary. It is provided and the operator cannot reach the operation handle.
For this reason, if it is going to adjust the tilling depth of a rotary, a driver | operator must stop a tiller once and go to the front side of a tiller, and rotate an operation handle, and it is very troublesome.
In particular, in the cultivation of long bamboo baskets, the white parts hidden in the soil are favored and eaten, so in order to obtain longer white parts, the production farmland is used to raise the heights on the fences that are planted in the soil between the fences. The intercostal space is deep and narrow, and there is almost no room for people to enter the sides of the intercostal space. Therefore, the adjustment of the height of the adjustment wheel is performed at the opportunity of the cultivator coming out of the hoe when moving to the next hoe, entering between adjacent ridges, straddling the hoe, or separately from the driver. It takes a lot of time and effort, such as having people go from the front of the furrow.

  On the other hand, for a tiller having a rotary on the rear side of the drive wheel, a technique for adjusting the tilling depth by operating a rear cover provided behind the rotary with a wire is proposed in Patent Document 1 below. In the technology, the rear cover can be moved up and down by operating the wire with a lever, and the tilling depth of the rotary can be adjusted.

JP 07-11806

  However, the technique of the above-mentioned patent document 1 is only adjusted by simply pushing and pulling the rear cover at the rear of the rotary with a wire, and is used as it is for a cultivator that adjusts the height of the adjustment wheel on the front side of the rotary. I can't.

  The present invention has been made in view of the above circumstances, and in a walk-type cultivator of the type in which an adjustment wheel is provided on the front side of the rotary in front of the drive wheel and operates on the rear side of the drive wheel, the rotary depth of the rotary is increased. It is an object of the present invention to provide a height adjusting device for a tilling depth adjusting wheel that can be easily adjusted by a driver at a driving position.

In order to achieve the above object, a height adjusting device for a tilling depth adjusting wheel of the present invention includes a rotary on the front side of the drive wheel, and an adjusting wheel for adjusting the tilling depth by vertical movement on the front side of the rotary wheel, This is for a field cultivator that operates with a driving handle behind the aircraft.
In the field cultivator, a cylindrical rod support is vertically fixed at a position on the front side of the rotary of the support member projecting forward from the body, and a rotary connecting body is provided at an upper portion of the rod support. And an adjustment wheel support rod having an adjustment wheel at the lower end is inserted in the lower part, and the adjustment wheel support rod is rotated by rotation of the rotation connection body between the rotation connection body and the adjustment wheel support rod. Equipped with an elevating mechanism that can move up and down within the height adjustment range of the adjustment wheel, the base end of the outer wire outside the flexible operation wire is fixed to the driving handle, and the base end of the inner wire inside the operation wire is fixed It is connected to a rotatable operating handle and the end of the inner wire is connected to the rotary connecting body.
The height of the adjusting wheel can be adjusted by rotating the operation handle at the driving position via the operation wire.

  According to a second aspect of the present invention, in the above-mentioned device, the elevating mechanism is attached to the lower part of the rod support body so that the upper part of the adjustment wheel support rod having the adjustment wheel supported at the lower end is not rotatable and can be moved up and down. The upper part of the rod support cylinder is mounted with a lower part of a rotating connecting body having a connecting part on the upper part so as to be rotatable and immovable up and down, and an upper part of the adjusting wheel supporting rod and a lower part of the rotating connecting body are connected to each other. It is characterized in that a screwing portion for screwing the height adjustment range of the adjusting wheel so as to be able to advance and retreat is formed by the rotation of the rotary connecting body.

  The invention of claim 3 is characterized in that, in the above invention, the inner wire of the operation wire is a steel wire having a reverse double spiral structure.

  In the invention of claim 4, in the above invention, a wire connecting pin hole is provided in the end portion of the inner wire, a connecting pin hole is provided in the rotary connecting body, and the wire connecting pin is inserted into both the pin holes. It is characterized in that the wire and the rotary connecting body can be attached and detached.

The present invention adjusts the height position of the adjustment wheel via the operation wire and the lifting mechanism by rotating the adjustment wheel provided in front of the tiller body in the driving position on the driving handle side. It becomes possible to freely adjust the rotary depth of the rotary.
For this reason, in conventional devices, adjustment of the rotary tillage depth of the rotary wheel using the adjusting wheel is not possible because the driver has not reached the operation handle. However, the present invention makes it possible for the driver to easily adjust the rotary tillage depth by rotating the operation handle with his / her hand while holding the driving handle alone. Is possible.
As a result, it is possible to cultivate with the rotary depth corresponding to the exact tillage depth of the farmland at any time even when the tiller work of the cultivator is in progress, and the work can be easily done independently. Work efficiency can be greatly improved.

  According to the second aspect of the present invention, the adjustment wheel support rod can surely move up and down by the rotation of the rotary connecting body connected to the inner wire in the operation wire by the lifting mechanism. As a result, the height position of the adjusting wheel provided on the adjusting wheel support rod with respect to the rotary can be freely adjusted.

The invention of claim 3 is that the inner wire in the operation wire has a reverse spiral structure of two steel wires, so that the rotation direction is either forward or reverse rotation from the base end of the operation wire. Rotation can be reliably transmitted to both the left and right ends.
Then, the adjustment wheel support rod can be moved up and down via an elevating mechanism in the rod support cylinder, and the height of the adjustment wheel can be reliably adjusted by rotating the operation handle at the operation position.

According to the invention of claim 4, the end portion of the inner wire can be easily attached to and detached from the rotary connecting body by the connecting pin.
For this reason, the connecting pin is pulled out from the conventional apparatus in which a cylinder that supports the rod of the adjusting wheel is provided with a lifting mechanism by rotation and the upper operation handle is pinned to the rotating member at the upper part of the lifting mechanism. If the operation handle is removed from the rotating member, the end of the inner wire of the present invention can be easily connected to the rotating member with a connecting pin, and a part of the conventional device can be reused. It becomes.

It is a side view which shows the use condition of this invention. It is a side view which shows the use condition of the conventional apparatus. It is a perspective view which shows the principal part of an adjustment wheel and an adjustment wheel support rod part. It is a vertical side view which shows an raising / lowering mechanism. It is a vertical side view which shows the principal part of the operation wire connection part by the side of an adjustment wheel. It is a vertical side view which shows the principal part of the operation wire connection part by the side of a driving handle.

An embodiment of a height adjusting device for a tilling depth adjusting wheel of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the cultivator targeted by the present invention is cultivated with a rotary handle 3 provided on the front side of the drive wheel 2 and having a driving handle 19 projecting toward the upper rear side of the machine body 1. This is a walking type tiller that performs work.

In order to adjust the tilling depth of the rotary 3, the tiller is provided with an adjusting wheel 5 on the front side of the rotary 3, and the rotary 3 sandwiched between the drive wheel 2 and the adjusting wheel 5 Raising the adjustment wheel 5 above the straight line connecting the lower end of the drive wheel 2 and the lower end of the rotary 3 causes the claws of the rotary 3 to hit the farmland and lowering it below the straight line. The rotary 3 spins away from the soil.
That is, the tilling depth of the rotary 3 is adjusted by adjusting the height position of the adjustment wheel 5 with respect to the rotary 3.
The present invention is a device for adjusting the height position of the adjustment wheel 5 relative to the rotary 3 in this way.

As shown in FIG. 1, the adjusting wheel 5 is supported by a cylindrical rod support 7 fixed to a support member 4 projecting forward from the machine body 1, and as shown in FIG. A bearing is rotatably supported on the lower portion of the adjustment wheel support rod 6 which protrudes from the lower portion of the body 7 so as to protrude and retract.
In addition, the code | symbol 5a in FIG. 5 is the wheel shaft 5a which enables the adjustment wheel 5 to rotate freely.

As shown in FIG. 4, the rod support 7 includes a rotary connecting body 8 having a connecting portion 21 having a connecting pin hole 24 penetrating horizontally in the upper portion and a male screw portion 22 in the lower portion. In a state where the connecting portion 21 protrudes from the body 7, the rod support 7 is supported by a shaft support hole 7 a provided at the upper end portion of the rod support 7 so as to be rotatable and unable to move up and down, and a male screw portion 22 in the rod support 7. The adjusting wheel support rod 6 inserted from the lower end portion of the rod support 7 is screwed into a female screw portion 23 formed at the upper end portion 6a so as to be non-rotatable and supported so as to be vertically movable.
In FIG. 4 and FIG. 5, the threaded portion 32 composed of the male screw portion 22 and the female screw portion 23 is long, and the female screw portion 23 is integrated with the upper end portion 6 a of the adjusting wheel support rod 6. The aspect of the raising / lowering mechanism 33 formed short is shown.

  The adjustment of the height position of the adjusting wheel 5 by the elevating mechanism 33 is performed by rotating the rotating connecting body 8 having the connecting portion 21 protruding from the upper end portion of the rod support 7 and the rod through the screwing portion 32. The adjustment wheel support rod 6 supported on the support body 7 so as to be movable up and down and non-rotatable is projected and lowered from the lower end of the rod support body 7.

  A rotary cover 29 covers the top of the rotary 3 so that the soil scraped up by the rotary claws of the rotary 3 does not scatter to the surroundings, but in order to fix the rotary cover 29, it protrudes from the front of the machine body 1. The provided cover support part is provided. As shown in FIG. 1, the cover support portion can be shared by the support member 4.

On the other hand, as shown in FIG. 1, the driving handle 19 is provided with a plate-like mounting portion 15 at a position that can be reached by the driver.
The mounting portion 15 may be provided directly on the driving handle 19, but may be provided on the auxiliary horizontal bar 20 of the handle as shown in FIG.

  As shown in FIG. 6, the mounting portion 15 is provided with a through hole 15 a, and the assist 12 portion where the base end portion 11 a of the outer wire 11 of the flexible operation wire 9 is fixed to the hole 15 a is passed through the assist 12. The portion is fixed by the nut 14 so that the outer wire 11 does not rotate.

  Further, the handle connecting portion 13 to which the base end portion of the inner wire 10 of the operation wire 9 is fixed is allowed to freely rotate through the assist 12, and the grip 16 a is cranked into the wire fixing pin hole 17 provided in the handle connecting portion 13. The handle fixing pin hole 18 provided in the fixing portion 16 b of the operation handle 16 formed in the shape is aligned and fixed with the handle fixing pin 31.

,
Then, as shown in FIGS. 1 and 5, the distal end portion of the operation wire 9 having the base end portion connected to the operation handle 16 is connected to the rotary connecting body 8.
At that time, the inner wire 10 at the end of the operation wire 9 is fixed to the connecting portion 21 of the rotary connecting body 8.

More specifically, as shown in FIG. 5, the end portion 11b of the outer wire 11 of the operation wire 9 is fixed to the outer cap 28, and the end portion 10b of the inner wire 10 of the operation wire 9 is The cap 28 penetrates through the rotation freely and is fixed to the wire connecting portion 26 via the inner wire end connecting portion 27.
That is, the outer cap 28 is fixed, and the inner wire end connecting portion 27 and the wire connecting portion 26 penetrating the outer cap 28 can be rotated integrally with the inner wire 10.

The wire connecting portion 26 is formed in a cylindrical shape capable of fitting the connecting portion 21 of the rotary connecting body 8 and is provided with a wire connecting pin hole 25.
And the wire connection part 26 is fitted to the connection part 21 of the rotary connection body 8 protruding from the upper end part of the rod support 7, and the wire connection pin is connected to the connection pin hole 24 of the connection part 21 and the wire connection pin hole 25. The wire connecting part 26 is connected to the connecting part 21 and fixed.

If the operation wire 9 is connected to the connecting portion 21 of the rotary connecting body 8 with a pinning structure that can be attached and detached by the wire connecting pin 30, the existing device has the same pin as the connecting portion 21 of the rotary connecting body 8. If the operation handle is connected using the stopper structure, the pin of the existing operation handle can be removed and the device of the present invention can be easily modified.
In this case, the connecting pin indicated by the symbol d in FIG. 2 of the conventional pinning type operating handle is removed, the operating handle 16 shown in FIG. 1 is moved to the driving handle side, and the connecting pin 31 shown in FIG. Can be attached.

Moreover, although the said flexible operation wire 9 is comprised by the outer wire 11 and the inner wire 10, the said inner wire 10 can be made into the spiral structure wound in the reverse direction of two steel wires.
Therefore, the rotation can be reliably transmitted from the proximal end portion to the distal end portion of the operation wire 9 regardless of whether the rotation direction is forward or reverse rotation, and the adjustment is performed via the lifting mechanism 33 in the rod support 7. The wheel support rod 6 can be reliably moved up and down, and the height of the adjustment wheel 5 can be reliably adjusted by the rotation of the operation handle 16 at the driving position.

  The present invention is mainly used for a walk-type field cultivator provided with a rotary on the front side, but it may be applicable to a boarding type field cultivator as long as it is a type provided with a rotary on the front side.

DESCRIPTION OF SYMBOLS 1 Plowing machine body 2 Drive wheel 3 Rotary 4 Support member 5 Adjustment wheel 5a Wheel shaft 6 Adjustment wheel support rod 6a Upper end part 7 Rod support body 8 Rotating coupling body 9 Operation wire 10 Inner wire 11 Outer wire 11a Outer wire end 12 Assist Part 13 Handle connecting part 14 Nut 15 Mounting part 16 Operation handle 16a Grip 16b Fixing part 17 Wire fixing pin hole 18 Handle fixing pin hole 19 Driving handle 20 Auxiliary horizontal bar 21 Connecting part 22 Male screw part 23 Female screw part 24 Connecting pin hole 25 Wire connecting pin hole 26 Wire connecting portion 27 Inner wire end connecting portion 28 Outer cap 29 Rotary cover 30 Wire connecting pin 31 Handle fixing pin 32 Screwing portion 33 Lifting mechanism

Claims (4)

In a cultivator equipped with a rotary on the front side of the drive wheel, having an adjustment wheel for adjusting the tillage depth by moving up and down on the front side of the rotary, and working with a driving handle on the rear of the machine body,
A cylindrical rod support is vertically fixed at a position on the front side of the rotary of the support member projecting forward from the airframe, and a rotary connecting body is inserted into the upper portion of the rod support body and at the lower portion. The adjustment wheel support rod having the adjustment wheel at the lower end is inserted, and the adjustment wheel support rod is adjusted by the rotation of the rotation connection body between the rotation connection body and the adjustment wheel support rod. Equipped with a lifting mechanism that can move up and down in the interior,
The base end of the outer outer flexible wire is fixed to the driving handle, the base end of the inner wire inside the operating wire is connected to the rotatable operating handle, and the distal end of the inner wire is connected to the rotary connecting body. Connected to
A height adjusting device for a tilling depth adjusting wheel, wherein the height of the adjusting wheel can be adjusted by rotating the operating handle at the driving position via the operating wire.   An elevating mechanism is mounted on the lower part of the rod support body with the upper part of the adjustment wheel support rod bearing the adjustment wheel at the lower end part so as not to rotate and to be movable up and down. A lower part of a rotating connecting body having a connecting portion is mounted so as to be rotatable and cannot be moved up and down, and the height of the adjusting wheel is adjusted by rotating the rotating connecting body between the upper part of the adjusting wheel support rod and the lower part of the rotating connecting body. 2. The height adjusting device for a tilling depth adjusting wheel according to claim 1, wherein a screwing portion for screwing the range so as to advance and retract is formed.   The height adjusting device for a tilling depth adjusting wheel according to claim 1 or 2, wherein the inner wire of the operation wire is a steel wire having a reverse double spiral structure. A wire connection pin hole is provided at the end of the inner wire, a connection pin hole is provided in the rotary connection body, and the operation wire and the rotation connection body can be attached and detached by inserting the wire connection pin into both pin holes. The height adjusting device for a tilling depth adjusting wheel according to any one of claims 1 to 3.

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