JP4167870B2 - Cultivator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cultivator provided with a foldable working handle.
[0002]
[Prior art]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-236304 [Patent Document 2]
JP, 2001-334965, A Conventionally, in order to be able to carry and store a tiller simply, a work handle is connected to a body of a tiller via a joint so that folding is possible.
The working handle of the tiller described in Patent Document 1 is bent at a joint and is put on the body. An auxiliary handle is provided at the front end of the aircraft. By bending and shortening the work handle, the auxiliary handle can be grasped and the tiller can be easily transported.
The tiller of Patent Document 2 is provided with an auxiliary handle at the front end of the airframe. The use of the auxiliary handle simplifies the transportation of the tiller.
[0003]
[Problems to be solved by the invention]
The tiller of Patent Document 1 is made compact and easy to carry by folding the work handle. However, the tiller can be easily transported by grasping only the auxiliary handle provided at the front end of the machine. It is difficult to load and unload on the loading platform. Moreover, the cultivator of [Patent Document 2] can grip the auxiliary handle when it is placed on or lowered from the trunk of a private car or the truck bed, etc., but since the work handle protrudes long from the machine body, It gets in the way of storage.
[0004]
Further, since each of the cultivators of [Patent Document 1] and [Patent Document 2] has a reinforcing bar that crosses the work handle in the middle of the work handle, the engine of the machine body and the like from the work position that grips the work handle. Access to is difficult. For example, the starter knob of the engine cannot be reached from the work position, and the worker must move to the side of the aircraft once.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1 is such that the work handle (4) can be folded via the joint (3) to the connection bar (2) protruding rearward from the body (1). in linked tillage machine, the first auxiliary handle (12) is attached to the machine body (1) projecting body (1) forwardly, wherein the working handle (4), using state of the tiller The second auxiliary handle (28) protruding downward is attached, and when the work handle (4) is folded , the second auxiliary handle (24) is located behind the fuselage (1). A cultivator that pivots around (3) and stands up is adopted.
[0006]
According to a second aspect of the present invention, in the cultivator according to the first aspect, a reinforcing bar (29) curved so as to protrude toward the machine body (1) is provided in the middle of the work handle (4). A cultivator in which a third auxiliary handle (22) is formed on the protruding portion of the reinforcing bar (29) is employed.
[0007]
The invention according to claim 3 is the tiller according to claim 1 or claim 2, wherein the joint (3) receives the base end (4a) of the work handle (4). And a tiller having a retaining part (14) for closing the recess (13a) and a pressing means (18) for adjusting the pressing force of the retaining part (14) against the base end part (4a).
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0009]
As shown in FIG. 1, the cultivator has a connection bar 2 that protrudes rearward from the machine body 1, and a work handle 4 is foldably connected to the connection bar 2 via a joint 3.
[0010]
The machine body 1 includes a cylindrical base 5 that extends in the vertical direction, has an engine 6 that is a drive source on the base 5, and has a rotor 7 for tillage under the base 5. The engine 6 is started by pulling a starter knob 8 disposed on the upper portion thereof, and the output of the engine 6 is transmitted to the rotor 7 via a transmission device (not shown) housed in the base 5 so that the rotor 7 rotates. Cultivate. A resistance rod 10 is connected to the rear portion of the base 5 via an arm 9, and a moving wheel 11 is connected to the resistance rod 10.
[0011]
A first auxiliary handle 12 is attached to the airframe 1 so as to protrude forward of the airframe. The first auxiliary handle 12 is formed by bending a pipe material into a substantially U shape, and projects forward from the base 5 below the engine 6.
[0012]
The connection bar 2 extends obliquely upward from the rear part of the machine body 1, the lower end is connected to the base 5, and the middle is gripped by the arm 9. The connection bar 2 is made of, for example, a pipe material.
[0013]
As shown in FIG. 2, the work handle 4 has a structure in which a pipe material is bent into a substantially U shape, and its base end portion is formed as a horizontally extending round shaft 4a.
[0014]
As shown in FIGS. 3 and 5, the joint 3 provided between the work handle 4 and the connection bar 2 includes a recess that receives the round shaft 4 a of the work handle 4 and a retaining portion that closes the recess. To do.
[0015]
The recess is formed by a horizontally extending U-shaped groove 13 a of the curved piece 13 fixed to the upper end of the connection bar 2. The round shaft 4a which is the base end portion of the work handle 4 is rotatably accommodated in the U-shaped groove 13a which is the concave portion.
[0016]
As shown in FIGS. 3 and 6, the retaining portion is formed by a plate-like sealing piece 14 that closes the opening of the U-shaped groove 13 a of the curved piece 13, and is fixed to the curved piece 13, thereby working a work handle. The four round shafts 4 a are restrained in the U-shaped groove 13 a of the bending piece 13.
[0017]
Between the concave portion and the retaining portion, a pressing means for adjusting the pressing force of the retaining portion with respect to the round shaft 4a is provided. That is, as shown in FIGS. 5 and 6, the engagement hole 15 is formed at one end of the bending piece 13, and the adjustment nut 16 is fixed to the other end of the bending piece 13. In addition, a protrusion 17 that engages with the engagement hole 15 is formed at one end of the sealing piece 14, and a through hole 19 of the adjustment bolt 18 is formed at the other end of the sealing piece 14. When the protrusion 17 of the sealing piece 14 is passed through the engagement hole 15, the adjustment bolt 18 is passed through the through hole 19, and the male screw of the adjustment bolt 18 is screwed with the female screw of the adjustment nut 16, the sealing piece 14 Presses the round shaft 4a against the bottom of the U-shaped groove 13a of the bending piece 13 and fixes the round shaft 4a so as not to rotate. Further, by adjusting the tightening degree of the adjusting bolt 18, the pressing force of the sealing piece 14 as a retaining portion for the round shaft 4a is adjusted, and the fixing force of the work handle 4 to the connection bar 2 is adjusted. .
[0018]
The peripheral portion of the joint 3 is covered with a protective cover 20 as shown in FIGS. The protective cover 20 is put on the vicinity of the upper end of the connection bar 2 from above, and is fixed with a set screw 21. The protective cover 20 is formed with a handle stop 23 into which a third auxiliary handle 22 (to be described later) is fitted when the work handle 4 is folded.
[0019]
The work handle 4 can be folded by rotating the U-shaped groove 13a as a fulcrum from the solid line position to the two-dot chain line position as shown in FIG. Although not possible, a handle bracket 24 is fixed to the round shaft 4a at the base end of the work handle 4 so as not to rotate in the opposite arrow B direction, as shown in FIGS. .
[0020]
That is, the handle bracket 24 abuts against the lower surface of the connection bar 2 when the work handle 4 is pulled out to the work position indicated by the solid line in FIG. 1, and prevents the work handle 4 from rotating in the arrow B direction. As shown in FIGS. 3 and 4, a pair of arm pieces 24a projecting from the side surface of the round shaft 4a so as to sandwich the tip end portion of the connection bar 2 therebetween, and a lower surface of the connection bar 2, as shown in FIGS. A contact piece 24b is provided between the arm pieces 24a and 24a so as to be able to come into contact with each other.
[0021]
The work handle 4 can be fixed at the pull-out position also by the adjusting bolt 18 that is the pressing means, but can also be fixed more firmly by the fixing means described below.
[0022]
As shown in FIGS. 3 and 4, the fixing means includes a fixing bolt 25 for fixing the handle bracket 24 to the connection bar 2. The fixing bolt 25 has a knob 25a at the rear end and a male screw 25b at the tip, and penetrates the protection cover 20, the connection bar 2, and the contact piece 24b. The male screw 25b of the fixing bolt 25 is screwed with the female screw of the fixing nut 24c fixed to the contact piece 24b, and the knob 25a can contact the protective cover 20. A compression coil spring 26 is wound around the screw shaft of the fixing bolt 25 between the knob 25 a and the connection bar 2, and the compression coil spring 26 constantly urges the fixing bolt 25 to the outside of the protective cover 20. When the fixing bolt 25 is tightened, the compression coil spring 26 is compressed, the knob 25 a comes into contact with the protective cover 20, and the contact piece 24 b presses against the surface of the connection bar 2. Thereby, the handle bracket 24 is fixed to the connection bar 2, and the work handle 4 is fixed to the connection bar 2 so as not to rotate. When the fixing bolt 25 is loosened, the compression coil spring 26 is relaxed, the male screw 25b is detached from the fixing nut 24c, and the contact piece 24b is separated from the connection bar 2. As a result, the handle bracket 24 is released from the connection bar 2. A stopper nut 27 is fixed to the screw shaft of the fixing bolt 25. After the fixing bolt 25 is detached from the fixing nut 24c, the stopper nut 27 prevents the fixing bolt 25 from falling off the connection bar 2.
[0023]
The cultivator having the above-described configuration is made compact by folding the work handle 4, which is advantageous in terms of transportation, storage, and the like, but is more advantageous if it includes the following various auxiliary handles.
[0024]
That is, as shown in FIGS. 1 to 3, the second auxiliary handle 28 that rotates to a position where the work handle 4 can be gripped when the work handle 4 is folded is attached to the work handle 4.
[0025]
Specifically, the second auxiliary handle 28 is formed by bending a pipe material in a substantially U shape like the first auxiliary handle 12, and is welded to the vicinity of both ends of the round shaft 4 a of the work handle 4. It is fixed. The second auxiliary handle 28 protrudes downward so as not to obstruct the work when the work handle 4 is folded to the work position as shown by a solid line in FIG. 1, and as shown by a two-dot chain line in FIG. When the work handle 4 is folded, the work handle 4 is fixed to the work handle 4 so as to stand up to a grippable position. When the work handle 4 is folded, the second auxiliary handle 28 stands up at the rear of the machine body 1 so that it can be gripped. The first auxiliary handle 12 is held with one hand, and the second hand is held with the other hand. The auxiliary handle 28 can be gripped, whereby the tiller can be easily lifted manually.
[0026]
Further, as shown in FIGS. 1 and 2, a reinforcing bar 29 that is curved so as to protrude toward the machine body 1 is provided in the middle of the work handle 4, and a third auxiliary handle 22 is provided at the protruding portion of the reinforcing bar 29. Is formed.
[0027]
Specifically, the reinforcing bar 29 is formed of a pipe material, and both ends thereof are stretched between the U-shaped work handles 4 and fixed by welding or the like. The central portion of the reinforcing bar 29 is curved so as to protrude toward the round shaft 4 a, and this curved portion serves as the third auxiliary handle 22. Even when the work handle 4 is not folded, the first auxiliary handle 12 can be gripped with one hand and the third auxiliary handle 22 can be gripped with the other hand. You can lift the machine. Since the reinforcing bar 29 is curved so as to protrude toward the machine body 1 side, the operator can easily move the body from the position for operating the work handle 4 to the machine body 1 side, and the worker can easily move the engine 6 on the machine body 1 side. The starter knob 8 or the like can be easily reached, and the engine 6 can be started easily.
[0028]
Next, the operation of the tiller configured as described above will be described.
[0029]
In order to fold the work handle 4 when transporting the cultivator or the like, first, the fixing bolt 25 is loosened and removed from the fixing nut 24c of the handle bracket 24, and the work handle 4 is supported by its round shaft 4a as a fulcrum. Rotate from a solid line position to a two-dot chain line position. Thereby, the work handle 4 is folded so as to cover the body 1, and the tiller is made compact as a whole. When the work handle 4 is put on the airframe 1, the third auxiliary handle 22 on the reinforcing bar 29 is locked to the handle stop 23 on the connection bar 2, thereby fixing the work handle 4 in the folded position. .
[0030]
When the work handle 4 is folded, the adjustment bolt 18 in the joint 3 is loosened as necessary to reduce the pressing force of the sealing piece 14 against the round shaft 4a and to make the work handle 4 easier to turn. After the work handle 4 is folded, the work handle 4 can be firmly fixed in the folded position by tightening the adjusting bolt 18.
[0031]
When the work handle 4 is folded, the second auxiliary handle 28 stands upward as shown by a two-dot chain line in FIG. 1, so that the first auxiliary handle 12 is held with one hand and the other hand is held with the other hand. The tiller can be easily lifted by gripping the second auxiliary handle 28. Accordingly, the cultivator can be easily loaded on the trunk of a private car, the truck bed, or the like.
[0032]
Further, since the third auxiliary handle 22 is formed on the reinforcing bar 29 in the middle of the work handle 4, even if the work handle 4 is not folded, the operator holds the first auxiliary handle 12 with one hand. The third tiller 22 can be easily lifted by holding and holding the third auxiliary handle 22 with the other hand. Therefore, the cultivator can be easily loaded on the trunk of a private car or the truck bed.
[0033]
To use the cultivator, the operation handle 4 is reversed to fold the work handle 4 from the two-dot chain line position in FIG. 1 to the solid line position, tighten the fixing bolt 25, and further, if necessary, the joint 3 The adjusting bolt 18 is tightened.
[0034]
The operator can start the tiller while standing at the position of the work handle 4. As shown in FIG. 2, since the reinforcing bar 29 is curved so as to protrude toward the body 1, the operator moves his / her hand from the position where the work handle 4 can be gripped to the body 1 side. When extended, the hand can easily reach the starter knob 8 of the engine 6 on the body 1 side, and the engine 6 can be started.
[0035]
【The invention's effect】
According to the invention of claim 1, in connection bar tiller to work the handle through the joint are linked folded projecting from fuselage airframe rearward, the first auxiliary handle projecting forward fuselage the A second auxiliary handle that protrudes downward when the tiller is in use is attached to the work handle, and when the work handle is folded , the second handle is attached to the rear of the work body. Since the auxiliary handle is a cultivator that rotates with the joint as a fulcrum and stands up, the second auxiliary handle can be gripped when the work handle is folded, and the first auxiliary handle can be held with one hand. The tiller can be easily lifted by grasping and grasping the second auxiliary handle with the other hand. Therefore, it can be easily loaded into the trunk of a private car, the truck bed, etc. when the tiller is transported.
[0036]
According to the second aspect of the present invention, in the cultivator according to the first aspect, the reinforcing bar curved so as to protrude toward the machine body is provided in the middle of the work handle, and a third portion is provided at the protruding portion of the reinforcing bar. Because it is a cultivator with an auxiliary handle, it is possible to hold the first auxiliary handle with one hand and the third auxiliary handle with the other hand even when the work handle is not folded. You can lift the cultivator easily. Therefore, it can be easily loaded into the trunk of a private car, the truck bed, etc. when the tiller is transported. Further, since the reinforcing bar is curved so as to protrude toward the machine body side, the operator can easily move from the work handle side to the machine body side. Therefore, the operator can easily reach the engine starter knob on the airframe side and can easily perform the engine starting operation and the like.
[0037]
According to a third aspect of the present invention, in the cultivator according to the first or second aspect, the joint includes a concave portion that receives the round shaft portion of the work handle, a retaining portion that closes the concave portion, and a round shaft. Since the cultivator is provided with a pressing means for adjusting the pressing force of the retaining portion relative to the portion, the pressing force of the retaining portion against the round shaft portion is adjusted by operating the pressing means, and the connection bar of the work handle The fixing force against can be adjusted. Therefore, it is possible to simplify the work of folding the work handle and to increase the fixing force of the work handle when it is folded.
[Brief description of the drawings]
FIG. 1 is a front view of a field cultivator according to the present invention.
FIG. 2 is a view as seen in the direction II in FIG. 1 and shows the periphery of the work handle.
FIG. 3 is a cross-sectional view taken along line III-III in FIG.
4 is a cross-sectional view taken along the line IV-IV in FIG. 3;
FIG. 5 is a partially enlarged view of FIG. 3;
6 is a view seen in the VI direction in FIG. 3 and shows a joint of a working handle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Airframe 2 ... Connection bar 3 ... Joint 4 ... Work handle 4a ... Round shaft 12 ... First auxiliary handle 13a ... U-shaped groove 14 ... Sealing piece 18 ... Adjustment bolt 22 ... Third auxiliary handle 28 ... No. Two auxiliary handles 29 ... reinforcing bar

Claims (3)

In the cultivator in which the work handle is foldably connected to the connection bar protruding from the body to the rear of the body via a joint,
First auxiliary handle projecting forward fuselage is mounted to said machine body,
The work handle is attached with a second auxiliary handle that protrudes downward when the tiller is in use.
2. A cultivator according to claim 1, wherein when the work handle is folded , the second auxiliary handle is pivoted with the joint as a fulcrum and stands up behind the machine body .   The cultivator according to claim 1, wherein a reinforcing bar curved so as to protrude toward the machine body is provided in the middle of the work handle, and a third auxiliary handle is formed at a protruding portion of the reinforcing bar. A cultivator.   3. The cultivator according to claim 1 or 2, wherein the joint adjusts a concave portion that receives the proximal end portion of the work handle, a retaining portion that closes the concave portion, and a pressing force of the retaining portion relative to the proximal end portion. A cultivator comprising a pressing means for performing the above operation.

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