JP5462826B2 - Plowing depth adjustment mechanism of rotary tiller - Google Patents

Plowing depth adjustment mechanism of rotary tiller Download PDF

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JP5462826B2
JP5462826B2 JP2011067389A JP2011067389A JP5462826B2 JP 5462826 B2 JP5462826 B2 JP 5462826B2 JP 2011067389 A JP2011067389 A JP 2011067389A JP 2011067389 A JP2011067389 A JP 2011067389A JP 5462826 B2 JP5462826 B2 JP 5462826B2
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screw shaft
support
arm member
handle
screw
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JP2012200199A (en
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利幸 松本
恵一 瀬崎
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Kubota Corp
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Kubota Corp
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Description

本発明は、外周面に雄ネジ部を有するネジ軸と、前記ネジ軸の雄ネジ部と螺合する雌ネジ部を内周面に有する筒体と、前記ネジ軸又は筒体の一方の上端に固定されたハンドル部と、前記ハンドル部が固定されたネジ軸又は筒体を回転自在に支持する支持体と、前記ネジ軸又は筒体の他方に接続された接地部材とを備え、前記ハンドル部を回転操作して前記ネジ軸又は筒体を回転させることによって、前記接地部材を昇降させるロータリ耕耘装置の耕深調節機構に関する。   The present invention includes a screw shaft having a male screw portion on an outer peripheral surface, a cylindrical body having a female screw portion screwed to the male screw portion of the screw shaft on an inner peripheral surface, and one upper end of the screw shaft or the cylindrical body. A handle portion fixed to the handle portion, a support body rotatably supporting the screw shaft or the cylinder body to which the handle portion is fixed, and a grounding member connected to the other of the screw shaft or the cylinder body. The present invention relates to a tilling depth adjusting mechanism of a rotary tiller that lifts and lowers the grounding member by rotating a screw shaft or a cylindrical body by rotating a part.

従来のロータリ耕耘装置に備えられる耕深調節機構としては、例えば、特許文献1に示すものが知られている。ここでは、尾輪(接地部材の一例)が筒体の下端に設けられており、ハンドル部を回転させてネジ軸を筒体に対して螺動操作することによって尾輪を昇降移動させ、これにより耕耘深さを任意に調節する。そして、耕耘作業中の振動又は衝撃などによりネジ軸が勝手に回動して尾輪の高さが変わり耕耘深さが変更されるのを防止するために、ネジ軸を回転自在に支持する支持体に板バネを固定し、その板バネをネジ軸の先端に設けた抜け止めカラーに常時圧接させることによってネジ軸の勝手な回動を阻止するように構成されている。   As a tilling depth adjusting mechanism provided in a conventional rotary tiller, for example, the one shown in Patent Document 1 is known. Here, a tail wheel (an example of a grounding member) is provided at the lower end of the cylinder, and the tail wheel is moved up and down by rotating the handle portion and screwing the screw shaft with respect to the cylinder. To adjust the tillage depth arbitrarily. In order to prevent the screw shaft from rotating freely due to vibration or impact during tillage work, changing the height of the tail wheel and changing the tilling depth, the support that supports the screw shaft rotatably A plate spring is fixed to the body, and the plate spring is constantly pressed against a retaining collar provided at the tip of the screw shaft, thereby preventing the screw shaft from rotating freely.

実公昭51−23521号公報(第2図、第3図)Japanese Utility Model Publication No. 51-23521 (FIGS. 2 and 3)

上述の板バネを使用する構成では、ネジ軸の回動を阻止する板バネの他に、抜け止めカラーという別部材を設ける必要があり、その組付け作業に手間を要するものであった。   In the configuration using the above-described leaf spring, in addition to the leaf spring that prevents the rotation of the screw shaft, it is necessary to provide another member called a retaining collar, which requires time and labor for assembling.

本発明の目的は、組付け作業が簡単で、尚且つ意図しない接地部材の昇降移動を確実に防止することができるロータリ耕耘装置の耕深調節機構を提供することにある。   An object of the present invention is to provide a plowing depth adjusting mechanism for a rotary tiller that is easy to assemble and that can reliably prevent an unintended lifting movement of a grounding member.

本発明に係るロータリ耕耘装置の耕深調節機構の第1特徴構成は、外周面に雄ネジ部を有するネジ軸と、前記ネジ軸の雄ネジ部と螺合する雌ネジ部を内周面に有する筒体と、前記ネジ軸又は筒体の一方の上端に固定されたハンドル部と、前記ハンドル部が固定されたネジ軸又は筒体を回転自在に支持する支持体と、前記ネジ軸又は筒体の他方に接続された接地部材とを備え、前記ハンドル部を回転操作して前記ネジ軸又は筒体を回転させることによって、前記接地部材を昇降させるロータリ耕耘装置の耕深調節機構であって、前記支持体の外周面に平面部が形成されており、アーム部材が前記ハンドル部に支持されて前記支持体の平面部に当て付けられることにより、前記ハンドル部を保持可能に構成されている点にある。   The first characteristic configuration of the tilling depth adjusting mechanism of the rotary tiller according to the present invention includes a screw shaft having a male screw portion on the outer peripheral surface, and a female screw portion screwed with the male screw portion of the screw shaft on the inner peripheral surface. A cylinder having a handle, a handle fixed to one end of the screw shaft or the cylinder, a support supporting the screw shaft or the cylinder fixed to the handle, and the screw shaft or the cylinder And a grounding member connected to the other side of the body, and a rotary depth adjustment mechanism for a rotary tiller that lifts and lowers the grounding member by rotating the handle and rotating the screw shaft or the cylinder. A flat portion is formed on the outer peripheral surface of the support, and the arm member is supported by the handle and is applied to the flat portion of the support so that the handle can be held. In the point.

〔作用及び効果〕
本構成によれば、ハンドル部に支持されたアーム部材を、支持体の平面部に当て付けてハンドル部を保持するように構成したため、耕耘作業中の振動又は衝撃がハンドル部に加えられたとしても、ハンドル部の位置が保持される。その結果、接地部材が接続されたネジ軸又は筒体の回転が阻止され、これにより接地部材の意図しない昇降移動を防止することができる。
さらに、本構成によれば、アーム部材を当て付ける部材として既存の支持体を利用するため、ネジ軸又は筒体の回転を阻止するアーム部材の他に別の部材を設ける必要がない。よって、部品点数が増えることもなく、組付け作業が容易である。
[Action and effect]
According to this configuration, since the arm member supported by the handle portion is applied to the flat portion of the support body so as to hold the handle portion, it is assumed that vibration or impact during tillage work is applied to the handle portion. In addition, the position of the handle portion is maintained. As a result, the rotation of the screw shaft or the cylinder body to which the grounding member is connected is prevented, thereby preventing the grounding member from being moved up and down unintentionally.
Furthermore, according to this configuration, since an existing support is used as a member to which the arm member is applied, there is no need to provide another member in addition to the arm member that prevents the rotation of the screw shaft or the cylinder. Therefore, the number of parts is not increased, and assembly work is easy.

第2特徴構成は、前記ハンドル部が、前記ネジ軸又は前記筒体の軸心と平行な平行軸を備え、前記アーム部材が、前記平行軸周りに取付角度変更自在に支持される点にある。   The second characteristic configuration is that the handle portion includes a parallel shaft parallel to the screw shaft or the axis of the cylindrical body, and the arm member is supported around the parallel shaft so that the mounting angle can be changed. .

〔作用及び効果〕
本構成によれば、アーム部材がネジ軸又は前記筒体の軸心と平行な平行軸周りに取付角度変更自在に支持されるため、アーム部材の取付角度を変更することによって、支持体の平面部に対するアーム部材の当て付け力を調節することができる。これにより、ネジ軸又は筒体の回転を阻止する力や、作業者がハンドル部を回転操作するときの操作感を自在に調節することができる。
[Action and effect]
According to this configuration, since the arm member is supported around the screw shaft or the parallel axis parallel to the axis of the cylindrical body so that the mounting angle can be changed, the plane of the support body can be changed by changing the mounting angle of the arm member. The abutting force of the arm member to the portion can be adjusted. Thereby, the force which blocks | prevents rotation of a screw shaft or a cylinder, and the operation feeling when an operator rotates a handle | steering-wheel part can be adjusted freely.

第3特徴構成は、前記平行軸が、前記ハンドル部において作業者が把持するグリップ部分である点にある。   A third characteristic configuration is that the parallel axis is a grip portion gripped by an operator in the handle portion.

〔作用及び効果〕
本構成によれば、平行軸をハンドル部のグリップ部分と兼用させてあるため、構成が簡素化されて低コスト化が図れる。
[Action and effect]
According to this configuration, since the parallel shaft is also used as the grip portion of the handle portion, the configuration is simplified and the cost can be reduced.

第4特徴構成は、前記支持体が、その外周面に多角柱形状部分を有し、前記アーム部材が、前記多角柱形状部分の少なくとも1つの角部において、前記角部を構成する2つの平面部に当て付けられている点にある。   According to a fourth feature configuration, the support has a polygonal column-shaped portion on an outer peripheral surface thereof, and the arm member has two planes constituting the corner at at least one corner of the polygonal column-shaped portion. It is in the point applied to the department.

〔作用及び効果〕
本構成によれば、アーム部材が、支持体の角部を構成する2つの平面部に当て付けられているため、耕耘作業中の振動又は衝撃がハンドル部に加えられることによりハンドル部が回転しようとするとき、アーム部材全体が支持体から離されまいとする抵抗が働くと共に、支持体の角部と当接するアーム部材の部分において、当該アーム部材の部分が押し広げられまいとする抵抗が働く。即ち、ハンドル部の回転に対して2つの抵抗力が作用するため、ハンドル部がより一層勝手に回転し難くなり、意図しない接地部材の昇降移動をより確実に防止することができる。
[Action and effect]
According to this configuration, since the arm member is applied to the two flat surface portions constituting the corner portion of the support body, the handle portion will rotate when vibration or impact during tillage work is applied to the handle portion. In this case, the resistance that prevents the entire arm member from being separated from the support works, and the resistance that prevents the arm member from being pushed and spread in the portion of the arm member that contacts the corner of the support. . That is, since two resistance forces act on the rotation of the handle portion, the handle portion becomes more difficult to rotate more freely, and the unintentional lifting and lowering movement of the grounding member can be more reliably prevented.

歩行型作業機の全体側面図である。It is the whole walk type work machine side view. 耕深調節機構の縦断面図である。It is a longitudinal cross-sectional view of a plowing depth adjustment mechanism. 耕深調節機構の平面図である。It is a top view of a working depth adjustment mechanism. 耕深調節機構の要部を拡大した縦断面図である。It is the longitudinal cross-sectional view which expanded the principal part of the plowing depth adjustment mechanism. アーム部材の動作を示す耕深調節機構の横断面図である。It is a cross-sectional view of the tilling depth adjusting mechanism showing the operation of the arm member. 耕深調節機構の別実施形態を示す横断面図である。It is a cross-sectional view showing another embodiment of the plowing depth adjusting mechanism. 耕深調節機構の別実施形態を示す横断面図である。It is a cross-sectional view showing another embodiment of the plowing depth adjusting mechanism.

〔実施形態〕
以下に、図1〜図5に基づいて、本発明に係る耕深調節機構を歩行型作業機1に適用した場合の実施形態について説明する。
(歩行型作業機)
図1に示すように、歩行型作業機1は、ミッションケース2、車軸3、車輪4、支持フレーム5、エンジン6、伝動ケース7、操縦ハンドル8、ロータリ耕耘装置9、及び耕深調節機構12を備えて構成されている。
Embodiment
Below, based on FIGS. 1-5, embodiment at the time of applying the working depth adjustment mechanism which concerns on this invention to the walk type work machine 1 is described.
(Walking work machine)
As shown in FIG. 1, the walking work machine 1 includes a mission case 2, an axle 3, wheels 4, a support frame 5, an engine 6, a transmission case 7, a steering handle 8, a rotary tiller device 9, and a tilling depth adjustment mechanism 12. It is configured with.

車軸3がミッションケース2の下部において右側及び左側に亘るように設けられており、車軸3の両端部に走行用の車輪4が連結されている。エンジン6がミッションケース2の前部に連結された支持フレーム5によって支持されており、伝動ケース7がミッションケース2の上部から斜め後方下方に延出されている。操縦ハンドル8が伝動ケース7から斜め後方上方に延出されており、ロータリ耕耘装置9が伝動ケース7の後部に連結されている。伝動ケース7に固定されたブラケット10が後方に延出されており、耕深調節機構12がブラケット10の後端部に配備され、上部が下部よりも前方に位置する傾斜姿勢でロック部材11によって固定されている。   An axle 3 is provided at the lower part of the transmission case 2 so as to extend to the right and left sides, and traveling wheels 4 are connected to both ends of the axle 3. The engine 6 is supported by a support frame 5 connected to the front part of the transmission case 2, and a transmission case 7 extends obliquely rearward and downward from the upper part of the transmission case 2. A steering handle 8 extends obliquely rearward and upward from the transmission case 7, and a rotary tiller 9 is connected to the rear portion of the transmission case 7. The bracket 10 fixed to the transmission case 7 extends rearward, the tilling depth adjusting mechanism 12 is provided at the rear end portion of the bracket 10, and the upper portion is positioned forward of the lower portion by the lock member 11. It is fixed.

(耕深調節機構)
図2に示すように、耕深調節機構12は、棒状のネジ軸13と、中空の正四角柱形状の筒体16と、ネジ軸13の上端に固定されたハンドル部18と、内部にネジ軸13と筒体16とを収容可能な中空の正四角柱形状の支持体32と、耕耘作業時に圃場と接地する尾輪34(接地部材の一例)とを備える。
(Plowing depth adjustment mechanism)
As shown in FIG. 2, the tilling depth adjusting mechanism 12 includes a rod-shaped screw shaft 13, a hollow regular quadrangular prism-shaped cylinder 16, a handle portion 18 fixed to the upper end of the screw shaft 13, and a screw shaft inside. 13 and a cylindrical support body 32 that can accommodate the cylindrical body 16 and a tail wheel 34 (an example of a grounding member) that comes into contact with the field during tillage work.

図4に示すように、ネジ軸13は、外周面に雄ネジ部を有する大径部13aと、雄ネジ部よりも小径の小径部13bとを備え、小径部13bが大径部13aの上端に設けられている。   As shown in FIG. 4, the screw shaft 13 includes a large-diameter portion 13a having a male screw portion on the outer peripheral surface and a small-diameter portion 13b having a smaller diameter than the male screw portion, and the small-diameter portion 13b is the upper end of the large-diameter portion 13a. Is provided.

図4に示すように、筒体16の上端には、ネジ軸13の大径部13aの雄ネジ部と螺合する雌ネジ部を内周面に有する雌ネジ部材17が嵌め込み固定されており、図2に示すように、筒体16の下端には、尾輪34が遊転可能に取り付けられている。   As shown in FIG. 4, a female screw member 17 having a female screw portion screwed into a male screw portion of the large-diameter portion 13 a of the screw shaft 13 is fitted and fixed to the upper end of the cylindrical body 16. As shown in FIG. 2, a tail wheel 34 is attached to the lower end of the cylindrical body 16 so as to be freely rotatable.

ハンドル部18を操作してネジ軸13をその軸心周りに回転させることによって、雌ネジ部材17がネジ軸13に沿って上下に移動し、これにより筒体16を支持体32の内部で自在に上下に移動させることができる。尚、このとき、雌ネジ部材17は、四角形状の頭部を有しており、横断面が四角形状の中空空間を有する筒体16の内部に収容されているため、回り止めされて回転しない。   By operating the handle portion 18 and rotating the screw shaft 13 around its axis, the female screw member 17 moves up and down along the screw shaft 13, thereby allowing the cylinder 16 to freely move inside the support 32. Can be moved up and down. At this time, since the female screw member 17 has a rectangular head and is housed in the cylindrical body 16 having a hollow space with a rectangular cross section, the female screw member 17 is prevented from rotating and does not rotate. .

図5に示すように、支持体32は、平面部Sとして第1〜4側面S1〜S4を有し、図4に示すように、上端に天井板33が溶接されている。   As shown in FIG. 5, the support body 32 has 1st-4th side surface S1-S4 as the plane part S, and as shown in FIG. 4, the ceiling board 33 is welded to the upper end.

図4に示すように、天井板33の中心部分には、ネジ軸13の小径部13bを挿通させるための挿通孔H3が、上下方向に貫通形成されている。尚、挿通孔H3の直径は、ネジ軸13の大径部13aの直径よりも小さく設定されている。   As shown in FIG. 4, an insertion hole H <b> 3 for inserting the small diameter portion 13 b of the screw shaft 13 is formed in the center portion of the ceiling plate 33 so as to penetrate in the vertical direction. The diameter of the insertion hole H3 is set smaller than the diameter of the large diameter portion 13a of the screw shaft 13.

ネジ軸13の小径部13bを、支持体32の内側から天井板33の挿通孔H3に挿通させて外側に突出させ、後述する支持部材22の被固定部22aの第1貫通孔H1に嵌入し、支持部材22の被固定部22aとネジ軸13の小径部13bとに亘るようにピンPを挿通させることによって、ハンドル部18がネジ軸13の上端に固定される。   The small diameter portion 13b of the screw shaft 13 is inserted into the insertion hole H3 of the ceiling plate 33 from the inside of the support body 32 and protrudes to the outside, and is inserted into the first through hole H1 of the fixed portion 22a of the support member 22 described later. The handle portion 18 is fixed to the upper end of the screw shaft 13 by inserting the pin P so as to extend over the fixed portion 22 a of the support member 22 and the small diameter portion 13 b of the screw shaft 13.

また、支持部材22の被固定部22aの下面が、支持体32の天井板33の上面に当接するため、ハンドル部18が固定されたネジ軸13が、支持体32において回転自在に支持される。   Further, since the lower surface of the fixed portion 22 a of the support member 22 contacts the upper surface of the ceiling plate 33 of the support body 32, the screw shaft 13 to which the handle portion 18 is fixed is rotatably supported by the support body 32. .

図2に示すように、ハンドル部18は、作業者が把持する棒状の把持部材19(グリップ部分)と、把持部材19とネジ軸13とを連結する支持部材22とを備える。   As shown in FIG. 2, the handle portion 18 includes a rod-shaped gripping member 19 (grip portion) gripped by an operator, and a support member 22 that connects the gripping member 19 and the screw shaft 13.

図2に示すように、把持部材19は、ネジ軸13の軸心と平行な平行軸であり、図4に示すように、把持部材19は、作業者が把持する把持部19aと、把持部19aよりも小径であって外周に雄ネジが形成された雄ネジ小径部19bとを備える。   As shown in FIG. 2, the gripping member 19 is a parallel axis parallel to the axis of the screw shaft 13, and as shown in FIG. 4, the gripping member 19 includes a gripping portion 19 a that the operator grips, and a gripping portion. And a male screw small-diameter portion 19b having a smaller diameter than 19a and having a male screw formed on the outer periphery.

支持部材22は、ネジ軸13の上端の小径部13bに固定される被固定部22aと、把持部材19を支持する支持部22bと、被固定部22aと支持部22bとを連結する連結部22cとを一体に備える。支持部材22の被固定部22a及び支持部22bのそれぞれには、第1貫通孔H1及び第2貫通孔H2が上下方向に貫通形成されている。   The support member 22 includes a fixed portion 22a that is fixed to the small diameter portion 13b at the upper end of the screw shaft 13, a support portion 22b that supports the grip member 19, and a connecting portion 22c that connects the fixed portion 22a and the support portion 22b. And integrated. A first through hole H <b> 1 and a second through hole H <b> 2 are vertically formed in each of the fixed portion 22 a and the support portion 22 b of the support member 22.

支持部22bの第2貫通孔H2の直径は、把持部材19の雄ネジ小径部19bの直径と略同じ大きさに設定されており、把持部材19の雄ネジ小径部19bを支持部22bの第2貫通孔H2に挿通させると、把持部材19の把持部19aが、支持部22bの上面に係止して保持され、且つ雄ネジ小径部19bの下端が支持部22bの第2貫通孔H2から突き出た状態となる。   The diameter of the second through hole H2 of the support portion 22b is set to be approximately the same as the diameter of the male screw small diameter portion 19b of the grip member 19, and the male screw small diameter portion 19b of the grip member 19 is the same as the diameter of the support portion 22b. When the two through holes H2 are inserted, the gripping portion 19a of the gripping member 19 is held and held on the upper surface of the support portion 22b, and the lower end of the male screw small-diameter portion 19b extends from the second through hole H2 of the support portion 22b. Protruding state.

(アーム部材)
図3〜図5(a)に示すように、アーム部材28は、バネ線材等の弾性のある部材を折り曲げて形成したものであり、把持部材19の把持部材19の雄ネジ小径部19bに固定される被固定部28aと、支持体32の外側面に当て付けられた状態で配置される当て付け部28bと、当て付け部28bと被固定部28aとを連結する連結部28cとを一体に備える。
(Arm member)
As shown in FIGS. 3 to 5A, the arm member 28 is formed by bending an elastic member such as a spring wire, and is fixed to the male screw small-diameter portion 19 b of the gripping member 19 of the gripping member 19. The fixed portion 28a to be fixed, the abutting portion 28b arranged in a state of being applied to the outer surface of the support body 32, and the connecting portion 28c for connecting the abutting portion 28b and the fixed portion 28a are integrated. Prepare.

アーム部材28の被固定部28aは輪状に折り曲げられて形成されており、その輪の中に把持部材19の雄ネジ小径部19bの下端を挿通させて、さらに下方からナットNを螺合させて締結することによって、アーム部材28の被固定部28aが、支持部材22の支持部22bの下端面とナットNとの間に挟持された状態でハンドル部18に支持される。   The fixed portion 28a of the arm member 28 is formed by being bent into a ring shape, and the lower end of the male screw small diameter portion 19b of the gripping member 19 is inserted into the ring, and a nut N is further screwed from below. By fastening, the fixed portion 28a of the arm member 28 is supported by the handle portion 18 while being sandwiched between the lower end surface of the support portion 22b of the support member 22 and the nut N.

これにより、アーム部材28は、平行軸である把持部材19周りに取付角度変更自在に支持されることになる。例えば、図3に示す状態から、アーム部材28の連結部28cが把持部材19から紙面左斜め下側に向かうように斜めに取り付けると、アーム部材28の支持体32に対する当て付け力が増加する。一方、図3に示す状態から、アーム部材28の連結部28cが把持部材19から紙面左斜め上側に向かうように斜めに取り付けると、アーム部材28の支持体32に対する当て付け力が弱められる。尚、本実施形態においては、ナットNの締め込みによって、アーム部材28の連結部28cが把持部材19から紙面左斜め下側に向かうようになるため、当て付け力が少し強められている。   Thus, the arm member 28 is supported around the gripping member 19 that is a parallel axis so that the mounting angle can be changed. For example, when the connecting portion 28c of the arm member 28 is attached obliquely from the gripping member 19 to the lower left side of the drawing surface from the state shown in FIG. 3, the abutting force of the arm member 28 against the support 32 increases. On the other hand, when the connecting portion 28c of the arm member 28 is attached obliquely from the gripping member 19 toward the upper left side of the drawing from the state shown in FIG. 3, the abutting force of the arm member 28 against the support 32 is weakened. In the present embodiment, when the nut N is tightened, the connecting portion 28c of the arm member 28 is directed from the gripping member 19 to the lower left side of the drawing, so that the abutting force is slightly strengthened.

図5(a)に示すように、アーム部材28の当て付け部28bは、支持体32の外側面の形状に合わせてコの字型に折り曲げられている。図5(a)に示す状態では、支持体32の横断面の第1角部A1及び第2角部A2において、第1角部A1を構成する第1側面S1及び第2側面S2、並びに第2角部A2を構成する第2側面S2及び第3側面S3に当て付けられている。尚、図4に示すように、本実施形態では、アーム部材28の被固定部28aの固定位置が、アーム部材28の当て付け部28bの当て付け位置よりも高い位置に設定されているため、連結部28cがクランク状に折り曲げられている。   As shown in FIG. 5A, the abutting portion 28 b of the arm member 28 is bent into a U shape in accordance with the shape of the outer surface of the support 32. In the state shown in FIG. 5A, in the first corner portion A1 and the second corner portion A2 of the cross section of the support body 32, the first side surface S1 and the second side surface S2 constituting the first corner portion A1, and the first corner portion A1. It is applied to the second side surface S2 and the third side surface S3 constituting the corner portion A2. As shown in FIG. 4, in the present embodiment, the fixing position of the fixed portion 28a of the arm member 28 is set to a position higher than the applying position of the applying portion 28b of the arm member 28. The connecting portion 28c is bent in a crank shape.

アーム部材28の当て付け部28bが、支持体32の第1〜第3側面S1〜S3に当て付けられていることによって、ハンドル部18の把持部材19の位置が保持される。これにより、耕耘作業中の振動又は衝撃などがハンドル部18に加えられたとしても、ハンドル部18が勝手に回動することがなく、尾輪34の高さが変わって耕耘深さが変更されることを防止することができる。   The abutting portion 28b of the arm member 28 is abutted against the first to third side surfaces S1 to S3 of the support body 32, whereby the position of the grip member 19 of the handle portion 18 is maintained. As a result, even if vibration or impact during the tilling work is applied to the handle portion 18, the handle portion 18 does not rotate freely, and the height of the tail wheel 34 changes to change the tillage depth. Can be prevented.

また例えば、ハンドル部18の把持部19aを、図5(a)の姿勢から、図5(b)の姿勢に90度回転させると、アーム部材28の当て付け部28bは、ハンドル部18の把持部19aの回転と共に支持体32の外側面に沿って移動することができ、第2角部A2を構成する第2側面S2及び第3側面S3、並びに第3角部A3を構成する第3側面S3及び第4側面S4に当て付けられ、ハンドル部18の把持部材19の位置が保持される。   Further, for example, when the grip portion 19a of the handle portion 18 is rotated 90 degrees from the posture of FIG. 5A to the posture of FIG. 5B, the abutting portion 28b of the arm member 28 grips the handle portion 18. The second side surface S2 and the third side surface S3 constituting the second corner portion A2 and the third side surface constituting the third corner portion A3 can be moved along the outer surface of the support body 32 with the rotation of the portion 19a. The position of the gripping member 19 of the handle portion 18 is held by being applied to S3 and the fourth side surface S4.

即ち、上記構成によれば、ハンドル部18の把持部19aをネジ軸13の軸心周りに回転させてネジ軸13を筒体16に対して螺動操作すると、筒体16と共に尾輪34が昇降移動し、これにより耕耘深さを任意に調節することができる。そして、耕耘作業時において振動又は衝撃などがハンドル部18に加えられたとしても、ハンドル部18がアーム部材28によって保持されて勝手に回動しないが、作業者が耕深調節を行うためにハンドル部18を回転させるときには、アーム部材28を取り外さなくとも特に支障なくハンドル部18を回転操作することができる。   That is, according to the above configuration, when the grip portion 19 a of the handle portion 18 is rotated around the axis of the screw shaft 13 and the screw shaft 13 is screwed to the cylinder body 16, the tail wheel 34 is moved together with the cylinder body 16. By moving up and down, the tillage depth can be adjusted arbitrarily. Even if vibration or impact is applied to the handle portion 18 during the plowing operation, the handle portion 18 is held by the arm member 28 and does not rotate freely, but the handle is used for the operator to adjust the plowing depth. When the portion 18 is rotated, the handle portion 18 can be rotated without any trouble without removing the arm member 28.

〔別実施形態〕
〔1〕前述の実施形態における支持体32の形状は、第1角部A1〜第4角部A4を有する正四角柱形状に限定されるものではく、他の多角柱形状としても良い。さらに全体が多角柱形状でなくとも良く、例えば、丸パイプ等の外周面の一部に多角形の加工を施したり、丸パイプ等の端部に多角形の部材を固定する等して、少なくともアーム部材28の当て付け部28bが配置される位置に、多角柱形状部分を有するようにして良い。
[Another embodiment]
[1] The shape of the support 32 in the above-described embodiment is not limited to the regular quadrangular prism shape having the first corner portion A1 to the fourth corner portion A4, and may be another polygonal prism shape. Furthermore, the entire shape may not be a polygonal column shape.For example, a polygonal process may be performed on a part of the outer peripheral surface of a round pipe or the like, or a polygonal member may be fixed to an end of the round pipe or the like. You may make it have a polygonal column-shaped part in the position where the abutting part 28b of the arm member 28 is arrange | positioned.

〔2〕図6に示すように、アーム部材28の当て付け部28bが、支持体32の複数の角部のうちの1つの角部A1においてのみ当て付けられている構成としても良い。即ち、アーム部材の当て付け部が、多角柱形状部分の少なくとも1つの角部において、その角部を構成する2つの平面部に当て付けられている構成であっても良い。 [2] As shown in FIG. 6, the abutting portion 28 b of the arm member 28 may be applied only at one corner A <b> 1 of the plurality of corners of the support 32. That is, the abutting portion of the arm member may be configured to be abutted against two plane portions constituting the corner portion in at least one corner portion of the polygonal column shape portion.

〔3〕図7に示すように、支持体32の形状は、多角柱形状部分を有するものでなくとも良く、アーム部材28の当て付け部28bを当て付け可能な平面部Sを少なくとも1つ有するものであれば良い。また、アーム部材28の当て付け部28bは、角部を構成する2つの平面部に当て付けられる構成としなくとも良く、アーム部材28の当て付け部28bが、少なくとも1つの平面部に当て付けられる構成としても良い。 [3] As shown in FIG. 7, the shape of the support body 32 does not need to have a polygonal column shape portion, and has at least one flat surface portion S to which the abutting portion 28 b of the arm member 28 can be abutted. Anything is fine. In addition, the abutting portion 28b of the arm member 28 may not be configured to be abutted against two planar portions constituting the corner portion, and the abutting portion 28b of the arm member 28 is abutted against at least one planar portion. It is good also as a structure.

〔4〕前述の実施形態におけるネジ軸13と筒体16との上下の位置関係を逆にして、筒体16の上端にハンドル部18を固定し、ネジ軸13の下端に尾輪34を取り付ける構成としても良い。尚、この場合、把持部材19は、筒体16の軸心と平行な平行軸となる。 [4] The vertical positional relationship between the screw shaft 13 and the cylinder body 16 in the above-described embodiment is reversed, the handle portion 18 is fixed to the upper end of the cylinder body 16, and the tail wheel 34 is attached to the lower end of the screw shaft 13. It is good also as a structure. In this case, the gripping member 19 has a parallel axis parallel to the axis of the cylindrical body 16.

〔5〕前述の実施形態において、ハンドル部18の把持部材19を、ネジ軸13の軸心と平行な平行軸とする構成を開示しているが、この構成に限定されるものではなく、ネジ軸13の軸心と平行な平行軸を別に設けて(例えば、支持部材22の連結部22cの部分)、アーム部材28をその平行軸に対して、当該平行軸周りに取付角度変更自在に支持するようにしても良い。また、前述の実施形態におけるネジ軸13と筒体16との上下の位置関係を逆にして、筒体16の上端にハンドル部18を固定し、ネジ軸13の下端に尾輪34を取り付ける構成とした場合も同様であり、この場合、筒体16の軸心と平行な平行軸を別に設けて、アーム部材28をその平行軸に対して、当該平行軸周りに取付角度変更自在に支持するようにしても良い。 [5] In the above-described embodiment, the configuration in which the gripping member 19 of the handle portion 18 is a parallel axis parallel to the axis of the screw shaft 13 is disclosed, but the present invention is not limited to this configuration. A parallel axis parallel to the axis of the shaft 13 is provided separately (for example, the connecting portion 22c portion of the support member 22), and the arm member 28 is supported with respect to the parallel axis so that the mounting angle can be changed around the parallel axis. You may make it do. In addition, a configuration in which the handle portion 18 is fixed to the upper end of the cylindrical body 16 and the tail wheel 34 is attached to the lower end of the screw shaft 13 by reversing the vertical positional relationship between the screw shaft 13 and the cylindrical body 16 in the above-described embodiment. In this case, a parallel axis parallel to the axis of the cylindrical body 16 is separately provided, and the arm member 28 is supported with respect to the parallel axis so that the mounting angle can be changed around the parallel axis. You may do it.

〔6〕アーム部材としては、バネ線材を折り曲げ形成したものに限らず、例えば帯板や丸棒や角棒などの異なる材料を折り曲げ形成したものであっても良く、横平板状の板材に切り欠きや穴加工等を施したものであっても良い。 [6] The arm member is not limited to one formed by bending a spring wire, but may be formed by bending different materials such as a strip, a round bar, a square bar, etc., and cut into a horizontal flat plate. It may be provided with notches and holes.

〔7〕接地部材は、前述の実施形態における尾輪34に限定されるものではなく、ソリ板等を使用しても良い。また、本発明は、尾輪34やソリ板等の接地部材が、筒体16やネジ軸13に対して直接取り付けられるような構成に限定されるものではなく、特許文献1等のように接地部材が他の部材を介して筒体16やネジ軸13に接続されている構成に対しても適用することができる。 [7] The grounding member is not limited to the tail wheel 34 in the above-described embodiment, and a warp plate or the like may be used. In addition, the present invention is not limited to the configuration in which the grounding member such as the tail wheel 34 or the sled plate is directly attached to the cylindrical body 16 or the screw shaft 13. The present invention can also be applied to a configuration in which the member is connected to the cylindrical body 16 and the screw shaft 13 via another member.

本発明は、走行用の車輪とロータリ耕耘装置とを別々に備えた歩行型作業機ばかりではなく、走行用の車輪を廃止し、右及び左の車軸に耕耘爪を連結してロータリ耕耘装置を構成した歩行型作業機や、乗用型のトラクタに装備されるロータリ耕耘装置にも有用である。   The present invention eliminates not only the walking type work machine having a traveling wheel and a rotary tiller separately but also abolishing the traveling wheel and connecting a tillage claw to the right and left axles to provide a rotary tiller. The present invention is also useful for the constructed walk-type work machine and the rotary tillage device installed in the riding type tractor.

9 ロータリ耕耘装置
12 耕深調節機構
13 ネジ軸
13a 大径部(雄ネジ部)
16 筒体
17 雌ネジ部材(雌ネジ部)
18 ハンドル部
19 把持部材(グリップ部分、平行軸)
28 アーム部材
32 支持体
34 尾輪(接地部材)
A 角部
S 平面部
9 Rotary tillage device 12 Plowing depth adjusting mechanism 13 Screw shaft 13a Large diameter part (male thread part)
16 Tube 17 Female thread member (Female thread part)
18 Handle part 19 Gripping member (grip part, parallel axis)
28 Arm member 32 Support body 34 Tail wheel (grounding member)
A Corner S S Plane

Claims (4)

外周面に雄ネジ部を有するネジ軸と、前記ネジ軸の雄ネジ部と螺合する雌ネジ部を内周面に有する筒体と、前記ネジ軸又は筒体の一方の上端に固定されたハンドル部と、前記ハンドル部が固定されたネジ軸又は筒体を回転自在に支持する支持体と、前記ネジ軸又は筒体の他方に接続された接地部材とを備え、前記ハンドル部を回転操作して前記ネジ軸又は筒体を回転させることによって、前記接地部材を昇降させるロータリ耕耘装置の耕深調節機構であって、
前記支持体の外周面に平面部が形成されており、アーム部材が前記ハンドル部に支持されて前記支持体の平面部に当て付けられることにより、前記ハンドル部を保持可能に構成されているロータリ耕耘装置の耕深調節機構。
A screw shaft having a male screw portion on the outer peripheral surface, a cylindrical body having a female screw portion screwed to the male screw portion of the screw shaft on the inner peripheral surface, and fixed to one upper end of the screw shaft or the cylindrical member A handle unit; a support body rotatably supporting the screw shaft or the cylinder body to which the handle unit is fixed; and a grounding member connected to the other of the screw shaft or the cylinder body. Then, by rotating the screw shaft or the cylinder, the plowing depth adjusting mechanism of the rotary tiller that raises and lowers the grounding member,
A flat surface portion is formed on the outer peripheral surface of the support, and the arm member is supported by the handle portion and applied to the flat surface portion of the support body, so that the handle portion can be held. Plowing depth adjustment mechanism of tillage equipment.
前記ハンドル部が、前記ネジ軸又は前記筒体の軸心と平行な平行軸を備え、前記アーム部材が、前記平行軸周りに取付角度変更自在に支持される請求項1に記載のロータリ耕耘装置の耕深調節機構。   2. The rotary tiller according to claim 1, wherein the handle portion includes a parallel shaft parallel to the screw shaft or the axial center of the cylindrical body, and the arm member is supported around the parallel shaft so that the mounting angle can be changed. Plowing depth adjustment mechanism. 前記平行軸が、前記ハンドル部において作業者が把持するグリップ部分である請求項2に記載のロータリ耕耘装置の耕深調節機構。   The tilling depth adjusting mechanism of the rotary tilling device according to claim 2, wherein the parallel shaft is a grip portion gripped by an operator in the handle portion. 前記支持体が、その外周面に多角柱形状部分を有し、前記アーム部材が、前記多角柱形状部分の少なくとも1つの角部において、前記角部を構成する2つの平面部に当て付けられている請求項1〜3のいずれか1項に記載のロータリ耕耘装置の耕深調節機構。   The support has a polygonal column-shaped portion on an outer peripheral surface thereof, and the arm member is applied to two flat portions constituting the corner at at least one corner of the polygonal column-shaped portion. The tilling depth adjusting mechanism of the rotary tiller according to any one of claims 1 to 3.
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN108934224A (en) * 2018-07-04 2018-12-07 张铃翎 A kind of ploughing apparatus of the agricultural planting convenient for operation

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CN106612683B (en) * 2017-01-11 2019-03-19 中国农业大学 A kind of symmetrical bolt positioning formula zero-clearance height adjustment device
CN108925155A (en) * 2018-09-08 2018-12-04 北京大智伟业科技有限公司 It tilts the layering powder that rotary-cut and rotary tillage combine and ploughs equipment

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JPH0628963Y2 (en) * 1985-09-20 1994-08-10 株式会社クボタ Rear two wheel handle structure
JP2542374Y2 (en) * 1991-11-29 1997-07-23 三菱農機株式会社 Non-rotating device of the handle shaft for adjusting the plowing depth in a rotary tillage device
JPH0956204A (en) * 1995-08-22 1997-03-04 Mitsubishi Agricult Mach Co Ltd Apparatus for adjusting tool bar of working machine

Cited By (1)

* Cited by examiner, † Cited by third party
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CN108934224A (en) * 2018-07-04 2018-12-07 张铃翎 A kind of ploughing apparatus of the agricultural planting convenient for operation

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