JP5965220B2 - Screw feed mechanism - Google Patents

Screw feed mechanism Download PDF

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JP5965220B2
JP5965220B2 JP2012141503A JP2012141503A JP5965220B2 JP 5965220 B2 JP5965220 B2 JP 5965220B2 JP 2012141503 A JP2012141503 A JP 2012141503A JP 2012141503 A JP2012141503 A JP 2012141503A JP 5965220 B2 JP5965220 B2 JP 5965220B2
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female screw
screw
stopper
female
screw member
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JP2014005867A (en
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大樹 中川
大樹 中川
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Saginomiya Seisakusho Inc
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Description

本発明は、雄ネジ部材と雌ネジ部材とが螺合することによって、雄ネジ部材と雌ネジ部材との相対的な回転角度を規制するように構成したネジ送り機構、例えば、電動弁に用いられ、雄ネジ部材と雌ネジ部材とが螺合することによって、弁体が弁座に対して離接するように構成したネジ送り機構に用いられるネジ送り機構に関する。   INDUSTRIAL APPLICABILITY The present invention is used in a screw feed mechanism configured to regulate a relative rotation angle between a male screw member and a female screw member by, for example, a motor-operated valve by screwing a male screw member and a female screw member. In addition, the present invention relates to a screw feed mechanism used in a screw feed mechanism configured such that a valve body is separated from and contacted with a valve seat by screwing a male screw member and a female screw member.

従来、永久磁石からなるローターマグネットを備えたこの種の電動弁、すなわち、流量制御弁では、所定の弁開度での流量が仕様上決まっており、それを達成させるためには、ランダムに組立てられたローターのストッパー位置と弁位置（閉弁位置、開弁位置）を、―定の位置に調整することが必要である。   Conventionally, in this type of motorized valve equipped with a rotor magnet made of a permanent magnet, that is, a flow control valve, the flow rate at a predetermined valve opening is determined by specifications, and in order to achieve this, it is assembled randomly. It is necessary to adjust the stopper position and valve position (valve closing position, valve opening position) of the rotor to a fixed position.

このようなステッピングモーターを駆動部としたアクチュエータにおいて、送りネジを用いた作動機構を備える場合、ローターの回転をストッパーを用いて規制することにより、送りネジの駆動範囲を制御できるようになる。   When an actuator using such a stepping motor as a drive unit is provided with an operating mechanism using a feed screw, the drive range of the feed screw can be controlled by restricting the rotation of the rotor using a stopper.

例えば、ステッピングモーターにより動作する開閉機構には、送りネジが使用されるが、閉動作時において、ネジの過剰な回転による締結を防止するためには、ストッパー（回転規制手段）を設ける必要がある。しかも、ステッピングモーターにより正確な開閉動作を行うには、ネジ閉時に位置出しを正確に行わなければならない。   For example, a feed screw is used for an opening / closing mechanism that is operated by a stepping motor, but it is necessary to provide a stopper (rotation restricting means) in order to prevent fastening due to excessive rotation of the screw during the closing operation. . Moreover, in order to perform an accurate opening / closing operation by the stepping motor, it is necessary to accurately position the screw when the screw is closed.

このため、特許文献１（特開２００８−２９１９８５号公報）、特許文献２（特開２０１２−６２９３８号公報）などにおいて、様々な送りネジの位置決め構造が提案されている。   For this reason, Patent Document 1 (Japanese Patent Laid-Open No. 2008-291985), Patent Document 2 (Japanese Patent Laid-Open No. 2012-62938), and the like have proposed various feed screw positioning structures.

図８は、このような従来のネジ送り機構１００の雌ネジ部材１０４の縦断面図、図９は、図８のＡ方向の端面図、図１０は、従来のネジ送り機構１００の作動を説明する概略図、図１１は、図１０のネジ送り機構１００のネジ締め付け時の部分拡大図である。   FIG. 8 is a longitudinal sectional view of the female screw member 104 of the conventional screw feeding mechanism 100, FIG. 9 is an end view in the direction A of FIG. 8, and FIG. 10 illustrates the operation of the conventional screw feeding mechanism 100. FIG. 11 is a partially enlarged view of the screw feeding mechanism 100 shown in FIG.

図８、図１０に示したように、ネジ送り機構１００は、雄ネジ部材１０２と、雌ネジ部材１０４とから構成されている。   As shown in FIGS. 8 and 10, the screw feeding mechanism 100 includes a male screw member 102 and a female screw member 104.

そして、雌ネジ部材１０４は、略筒状の雌ネジ本体１０６を備えており、この雌ネジ本体１０６の内部には、内周側に雌ネジ１０８が形成された筒状の雌ネジブッシュ１１０が嵌着されている。また、図８、図９に示したように、雌ネジ本体１０６の一端側に形成したフランジ１１２上には、雌ネジ側ストッパー１１４が外方に突設するように形成されている。   The female screw member 104 includes a substantially cylindrical female screw main body 106, and a cylindrical female screw bush 110 having a female screw 108 formed on the inner peripheral side is provided inside the female screw main body 106. It is inserted. Also, as shown in FIGS. 8 and 9, a female screw side stopper 114 is formed on the flange 112 formed on one end side of the female screw main body 106 so as to project outward.

一方、図１０に示したように、雄ネジ部材１０２は、略円柱形状であり、大径の基端部１１６と、この基端部１１６の先端に形成されたフランジ１１８を備えている。また、フランジ１１８の先端側には、雌ネジ本体１０６の内周に挿入される小径部１２０を備えている。さらに、小径部１２０の先端側の外周には、雌ネジブッシュ１１０の雌ネジ１０８と螺合する雄ネジ１２２が形成されている。   On the other hand, as shown in FIG. 10, the male screw member 102 has a substantially cylindrical shape, and includes a large-diameter proximal end portion 116 and a flange 118 formed at the distal end of the proximal end portion 116. In addition, a small-diameter portion 120 that is inserted into the inner periphery of the female screw main body 106 is provided on the distal end side of the flange 118. Furthermore, a male screw 122 that is screwed with the female screw 108 of the female screw bush 110 is formed on the outer periphery on the distal end side of the small diameter portion 120.

そして、雄ネジ部材１０２のフランジ１１８には、先端側に突設するように形成された雄ネジ側ストッパー１２４が形成されている。   A male thread side stopper 124 is formed on the flange 118 of the male thread member 102 so as to protrude from the distal end side.

このように構成されるネジ送り機構１００では、図示しないステッピングモーターにより、雄ネジ部材１０２が、図１０の矢印Ｂで示したように回転することによって、雄ネジ部材１０２の先端に形成された雄ネジ１２２が、雌ネジ部材１０４の雌ネジブッシュ１１０に形成された雌ネジ１０８に螺合する。
In the screw feed mechanism 100 configured as described above, the male screw member 102 is rotated as shown by an arrow B in FIG. The screw 122 is screwed into the female screw 108 formed on the female screw bush 110 of the female screw member 104.

これによって、雄ネジ部材１０２が、図１０の矢印Ｃ方向に移動することによって、例えば、電動弁などの制御弁において、流量を制御するようになっている。
As a result, the male screw member 102 moves in the direction of arrow C in FIG. 10 to control the flow rate, for example, in a control valve such as an electric valve.

そして、図１１に示したように、ネジ締め付け時、例えば、弁閉時において、ネジの過剰の回転による締結を防止するために、雄ネジ部材１０２と雌ネジ部材１０４とが締結してしまう直前に、雄ネジ部材１０２の雄ネジ側ストッパー１２４が、雌ネジ部材１０４の雌ネジ側ストッパー１１４に当接して、ネジ送り機構１００の駆動範囲を規制するように構成されている。   Then, as shown in FIG. 11, immediately before the male screw member 102 and the female screw member 104 are fastened in order to prevent fastening due to excessive screw rotation, for example, when the valve is closed, as shown in FIG. Further, the male screw side stopper 124 of the male screw member 102 is configured to abut against the female screw side stopper 114 of the female screw member 104 so as to restrict the drive range of the screw feeding mechanism 100.

特開２００８−２９１９８５号公報JP 2008-291985 A 特開２０１２−６２９３８号公報JP 2012-62938 A

しかしながら、従来のネジ送り機構の製造方法においては、ネジ駆動範囲の設定は、送りネジである雄ネジ部材１０２の雄ネジ１２２、雌ネジ部材１０４の雌ネジ１０８のネジ位置を手動で調整した状態でストッパー部を組み立てていた。   However, in the conventional method for manufacturing the screw feed mechanism, the screw drive range is set by manually adjusting the screw positions of the male screw 122 of the male screw member 102 and the female screw 108 of the female screw member 104 which are feed screws. I assembled the stopper part.

従って、このような従来のネジ送り機構１００では、雄ネジ部材１０２の雄ネジ側ストッパー１２４と、雌ネジ部材１０４の雌ネジ側ストッパー１１４のそれぞれのストッパー高さが、不適切な状態で組まれた場合に、下記のような問題が生じる。   Therefore, in such a conventional screw feed mechanism 100, the stopper heights of the male screw side stopper 124 of the male screw member 102 and the female screw side stopper 114 of the female screw member 104 are assembled in an inappropriate state. If this happens, the following problems occur.

すなわち、例えば、図１２に示したように、ネジ締め付け時、例えば、弁閉時において、雄ネジ部材１０２の雄ネジ側ストッパー１２４と、雌ネジ部材１０４の雌ネジ側ストッパー１１４との当接距離Ｒ、すなわち当接面積が、小さい場合には、耐久性が低下して繰り返しの使用によって、雄ネジ側ストッパー１２４と、雌ネジ側ストッパー１１４とが摩耗損傷してしまう。   That is, for example, as shown in FIG. 12, when the screw is tightened, for example, when the valve is closed, the contact distance between the male screw side stopper 124 of the male screw member 102 and the female screw side stopper 114 of the female screw member 104. When R, that is, the contact area is small, the durability decreases and the male screw side stopper 124 and the female screw side stopper 114 are worn and damaged by repeated use.

これによって、図１３に示したように、雄ネジ部材１０２の雄ネジ側ストッパー１２４と、雌ネジ部材１０４の雌ネジ側ストッパー１１４とが当接しない状態となって、ストッパーとして機能せず、雄ネジ部材１０２が過剰に回転して、締結状態となり、ネジ送り機構１００が正常に作動しないおそれがある。   As a result, as shown in FIG. 13, the male screw-side stopper 124 of the male screw member 102 and the female screw-side stopper 114 of the female screw member 104 are not in contact with each other, and do not function as a stopper. There is a possibility that the screw member 102 rotates excessively to be in a fastening state, and the screw feed mechanism 100 does not operate normally.

また、不適切な状態で組まれた場合に、当初から図１３に示したように、雄ネジ部材１０２の雄ネジ側ストッパー１２４と、雌ネジ部材１０４の雌ネジ側ストッパー１１４とが当接しない状態となって、ストッパーとして機能せず、雌ネジ部材１０４が過剰に回転して、締結状態となり、ネジ送り機構１００が正常に作動しない場合もある。   Further, when assembled in an inappropriate state, as shown in FIG. 13 from the beginning, the male screw side stopper 124 of the male screw member 102 and the female screw side stopper 114 of the female screw member 104 do not contact each other. In some cases, the screw does not function as a stopper, the female screw member 104 rotates excessively, and the screw feeding mechanism 100 does not operate normally.

さらに、図１４に示したように、ネジ締め付け時、例えば、弁閉時において、雄ネジ部材１０２の雄ネジ側ストッパー１２４と、雌ネジ部材１０４の雌ネジ側ストッパー１１４とが当接する前に、雄ネジ部材１０２が過剰に回転して、締結状態となり、ネジ送り機構１００が正常に作動しないおそれがある。   Furthermore, as shown in FIG. 14, when the screw is tightened, for example, when the valve is closed, before the male screw side stopper 124 of the male screw member 102 and the female screw side stopper 114 of the female screw member 104 abut, There is a possibility that the male screw member 102 rotates excessively and is in a fastening state, and the screw feeding mechanism 100 does not operate normally.

このように従来のネジ送り機構１００では、不適切な状態で組まれた場合に、ネジの駆動範囲がばらついて、上記のような問題が発生していた。   As described above, in the conventional screw feeding mechanism 100, when assembled in an inappropriate state, the screw driving range varies and the above-described problem occurs.

また、従来のネジ送り機構１００では、製作に時間がかかり、位置出し機構を備えた送りネジを構成する部品点数が多くなり、複雑な工程が必要でコストも高くつくことになっていた。   In addition, the conventional screw feed mechanism 100 takes time to manufacture, increases the number of parts constituting the feed screw provided with the positioning mechanism, requires a complicated process, and increases the cost.

本発明は、このような現状に鑑み、ネジ締め付け時、例えば、弁閉時において、雄ネジ部材の雄ネジ側ストッパーと、雌ネジ部材の雌ネジ側ストッパーとの当接距離、すなわち、当接面積が常に一定で、雄ネジ部材が過剰に回転して、締結状態となることがなく、ネジ送り機構を正常に作動することができ、しかも、部品点数が少なく、複雑な工程が不要でコストも低減できるネジ送り機構を提供することを目的とする。   In view of such a current situation, the present invention provides a contact distance between a male screw side stopper of a male screw member and a female screw side stopper of a female screw member at the time of screw tightening, for example, when a valve is closed. The area is always constant, the male screw member does not rotate excessively and does not enter the fastening state, the screw feed mechanism can be operated normally, and the number of parts is small, no complicated process is required and the cost is low. It is an object of the present invention to provide a screw feed mechanism that can reduce the amount of noise.

本発明は、前述したような従来技術における課題及び目的を達成するために発明されたものであって、本発明のネジ送り機構は、
雄ネジ部材と雌ネジ部材とが螺合し、前記雄ネジ部材に設けた雄ネジ側ストッパーが、前記雌ネジ部材に設けた雌ネジ側ストッパーに当接することによって、雄ネジ部材と雌ネジ部材との相対的な回転角度を規制するように構成したネジ送り機構であって、
前記雌ネジ部材に設けた雌ネジ側ストッパーの位置Ｐ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２が、中心角度αが一定の角度になるように設定するとともに、
前記雌ネジ部材に設けた雌ネジ側ストッパーの高さ位置Ｑ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め高さ位置Ｑ２との距離Ｓが、一定の距離になるように設定するように構成したネジ送り機構において、
前記雌ネジ部材が、雌ネジが形成された雌ネジ部材本体と、雌ネジ部材本体に装着され、雌ネジ側ストッパーが形成された雌ネジ側ストッパー部材を備え、
前記雌ネジ部材本体が、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２に対応した位置に形成された雌ネジ側位置合わせ部を備え、
前記雌ネジ側ストッパー部材が、雌ネジ部材本体の雌ネジ側位置合わせ部に対応し、雌ネジ側ストッパーの位置に対して、一定の中心角となるように形成された雌ネジストッパー側位置合わせ部を備え、
前記雌ネジ部材本体の雌ネジ側位置合わせ部と、雌ネジ側ストッパー部材の雌ネジストッパー側位置合わせ部との位置が合致した状態で、雌ネジ側ストッパー部材を雌ネジ部材本体に装着するとともに、
ネジ締め付け時、雄ネジ部材と雌ネジ部材とが締結してしまう直前に、雄ネジ部材の雄ネジ側ストッパーが、雌ネジ部材の雌ネジ側ストッパーに当接するとともに、
ネジ締め付け時、雄ネジ部材の雄ネジ側ストッパーと、雌ネジ部材の雌ネジ側ストッパーとの当接距離Ｒが一定であるように構成したことを特徴とする。

The present invention has been invented in order to achieve the above-described problems and objects in the prior art.
The male screw member and the female screw member are screwed together, and the male screw side stopper provided on the male screw member abuts on the female screw side stopper provided on the female screw member. A screw feed mechanism configured to regulate the relative rotation angle with
With respect to the position P1 of the female screw side stopper provided on the female screw member, the screw cutting start position P2 of the female screw formed on the female screw member is set so that the center angle α is a constant angle,
The distance S between the height position Q1 of the female screw side stopper provided on the female screw member and the height position Q2 of the female screw formed on the female screw member is constant. In the screw feed mechanism configured to set ,
The female screw member includes a female screw member main body in which a female screw is formed, and a female screw side stopper member that is attached to the female screw member main body and in which a female screw side stopper is formed,
The female screw member main body includes a female screw side alignment portion formed at a position corresponding to the screw cutting start position P2 of the female screw formed on the female screw member,
The female screw side stopper member corresponds to the female screw side alignment portion of the female screw member main body, and the female screw stopper side alignment is formed so as to have a constant central angle with respect to the position of the female screw side stopper. Part
And the female thread side positioning portion of the female screw member body, with the position matched with the female screw stopper-side positioning portion of the female screw side stopper member, thereby attaching the female screw side stopper member into the female screw member body ,
At the time of screw tightening, immediately before the male screw member and the female screw member are fastened, the male screw side stopper of the male screw member abuts on the female screw side stopper of the female screw member,
It is characterized in that the contact distance R between the male screw side stopper of the male screw member and the female screw side stopper of the female screw member is constant when the screw is tightened .

このように構成することによって、雌ネジ部材に設けた雌ネジ側ストッパーの位置Ｐ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２が、中心角度αが一定の角度になるように設定するとともに、雌ネジ部材に設けた雌ネジ側ストッパーの高さ位置Ｑ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め高さ位置Ｑ２との距離Ｓが、一定の距離になるように設定されている。   By configuring in this way, the threading start position P2 of the female screw formed on the female screw member is at a constant angle α with respect to the position P1 of the female screw side stopper provided on the female screw member. The distance S between the height position Q1 of the female screw side stopper provided on the female screw member and the height position Q2 of the female screw formed on the female screw member is constant. Is set to be a distance.

従って、雄ネジ部材に設けた雄ネジ側ストッパーと、雌ネジ部材に設けた雌ネジ側ストッパーとの相対位置が一定となる。   Therefore, the relative position between the male screw side stopper provided on the male screw member and the female screw side stopper provided on the female screw member is constant.

これにより、ネジ締め付け時、例えば、弁閉時において、雄ネジ部材の雄ネジ側ストッパーと、雌ネジ部材の雌ネジ側ストッパーとの当接距離、すなわち、当接面積が常に一定で、雄ネジ部材が過剰に回転して、締結状態となることがなく、ネジ送り機構を正常に作動することができ、しかも、部品点数が少なく、複雑な工程が不要でコストも低減できる。   Accordingly, when the screw is tightened, for example, when the valve is closed, the contact distance between the male screw side stopper of the male screw member and the female screw side stopper of the female screw member, that is, the contact area is always constant, and the male screw The member does not rotate excessively and is not in a fastening state, the screw feeding mechanism can be operated normally, and the number of parts is small, a complicated process is unnecessary, and the cost can be reduced.

しかも、雌ネジ部材が、雌ネジが形成された雌ネジ部材本体と、雌ネジ部材本体に装着され、雌ネジ側ストッパーが形成された雌ネジ側ストッパー部材を備えている。   Moreover, the female screw member includes a female screw member main body in which the female screw is formed, and a female screw side stopper member that is attached to the female screw member main body and in which the female screw side stopper is formed.

そして、雌ネジ側ストッパー部材が、雌ネジ部材本体の雌ネジ側位置合わせ部に対応し、雌ネジ側ストッパーの位置に対して、一定の中心角となるように形成された雌ネジストッパー側位置合わせ部を備えている。
Then, the female screw side stopper member corresponds to the female screw side positioning portion of the female screw member main body, and the female screw stopper side position is formed so as to have a constant central angle with respect to the position of the female screw side stopper. A mating section is provided.

これに対応して、雌ネジ部材本体の雌ネジ側位置合わせ部と、雌ネジ側ストッパー部材の雌ネジストッパー側位置合わせ部との位置が合致した状態で、雌ネジ側ストッパー部材を雌ネジ部材本体に装着している。   Correspondingly, in the state where the female screw side alignment portion of the female screw member main body and the female screw stopper side alignment portion of the female screw side stopper member are aligned, the female screw side stopper member is connected to the female screw member. It is attached to the main body.

これにより、雌ネジ部材本体の雌ネジ側位置合わせ部と、雌ネジ側ストッパー部材の雌ネジストッパー側位置合わせ部との位置が合致した状態で、雌ネジ側ストッパー部材を雌ネジ部材本体に装着するだけで、雌ネジ部材に設けた雌ネジ側ストッパーの位置Ｐ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２が、中心角度αが一定の角度になるように設定するとともに、雌ネジ部材に設けた雌ネジ側ストッパーの高さ位置Ｑ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め高さ位置Ｑ２との距離Ｓが、一定の距離になるように簡単に設定することができる。   As a result, the female screw side stopper member is mounted on the female screw member main body in a state where the female screw side alignment portion of the female screw member main body and the female screw stopper side alignment portion of the female screw side stopper member are aligned. By simply doing this, the threading start position P2 of the female screw formed on the female screw member is set so that the central angle α is a constant angle with respect to the position P1 of the female screw side stopper provided on the female screw member. In addition, the distance S between the height position Q1 of the female screw side stopper provided on the female screw member and the height position Q2 of the female screw formed on the female screw member is a constant distance. Can be set up easily.

その結果、雄ネジ部材に設けた雄ネジ側ストッパーと、雌ネジ部材に設けた雌ネジ側ストッパーとの相対位置を、容易に、しかも、正確に常に一定とすることができる。   As a result, the relative position between the male screw side stopper provided on the male screw member and the female screw side stopper provided on the female screw member can be easily and accurately always constant.

また、本発明のネジ送り機構は、前記雌ネジ側位置合わせ部が、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２に合致する位置に形成されていることを特徴とする。
このように、雌ネジ側位置合わせ部が、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２に合致する位置に形成されていても良い。 The screw feed mechanism according to the present invention is characterized in that the female screw side alignment portion is formed at a position that coincides with a screw cutting start position P2 of the female screw formed on the female screw member.
As described above, the female screw side alignment portion may be formed at a position that matches the screw cutting start position P2 of the female screw formed on the female screw member.

また、本発明のネジ送り機構は、前記雌ネジ側位置合わせ部が、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２に対応して一定の中心角ずらした位置に形成されていることを特徴とする。
このように、雌ネジ側位置合わせ部が、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２に対応して一定の中心角ずらした位置に形成されていても良い。 Further, in the screw feeding mechanism of the present invention, the female screw side alignment portion is formed at a position shifted by a certain center angle corresponding to the screw cutting start position P2 of the female screw formed on the female screw member. It is characterized by that.
In this manner, the female screw side alignment portion may be formed at a position shifted by a certain center angle corresponding to the screw cutting start position P2 of the female screw formed on the female screw member.

この場合には、雌ネジストッパー側位置合わせ部が、雌ネジ側ストッパーの位置に対して、一定の中心角となるように形成して、雌ネジ側ストッパー部材を雌ネジ部材本体に装着した状態で、雌ネジ側ストッパー部材に設けた雌ネジ側ストッパーの位置Ｐ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２が、中心角度αが一定の角度になるように設定すればよい。   In this case, the female screw stopper side alignment portion is formed to have a constant central angle with respect to the position of the female screw side stopper, and the female screw side stopper member is attached to the female screw member main body. Thus, with respect to the position P1 of the female screw side stopper provided on the female screw side stopper member, the threading start position P2 of the female screw formed on the female screw member is set so that the central angle α is a constant angle. do it.

また、本発明のネジ送り機構は、
前記雌ネジ部材本体の雌ネジ側位置合わせ部が、雌ネジ部材本体に形成された雌ネジ側切欠部であり、
前記雌ネジ側ストッパー部材の雌ネジストッパー側位置合わせ部が、前記雌ネジ側切欠部に嵌合するように、雌ネジ側ストッパー部材に形成された雌ネジストッパー側突設部であることを特徴とする。 The screw feed mechanism of the present invention is
The female screw side positioning portion of the female screw member main body is a female screw side cutout formed in the female screw member main body,
The female screw stopper side alignment portion of the female screw side stopper member is a female screw stopper side protruding portion formed on the female screw side stopper member so as to be fitted to the female screw side notch portion. And

このように構成することによって、雌ネジ側ストッパー部材に形成された雌ネジストッパー側突設部を、雌ネジ部材本体に形成された雌ネジ側切欠部に嵌合するだけで、雌ネジ部材に設けた雌ネジ側ストッパーの位置Ｐ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２が、中心角度αが一定の角度になるように設定するとともに、雌ネジ部材に設けた雌ネジ側ストッパーの高さ位置Ｑ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め高さ位置Ｑ２との距離Ｓが、一定の距離になるようにさらに簡単に設定することができる。   By configuring in this manner, the female screw stopper side protruding portion formed on the female screw side stopper member is fitted into the female screw side cutout portion formed on the female screw member main body. The female screw start position P2 of the female screw formed on the female screw member is set so that the central angle α is a constant angle with respect to the position P1 of the provided female screw side stopper, and provided on the female screw member. Further, the distance S between the height position Q1 of the female screw side stopper and the height position Q2 of the female screw formed on the female screw member can be set more simply so as to be a constant distance. Can do.

その結果、雄ネジ部材に設けた雄ネジ側ストッパーと、雌ネジ部材に設けた雌ネジ側ストッパーとの相対位置を、さらに容易に、しかも、正確に常に一定とすることができる。   As a result, the relative position between the male screw side stopper provided on the male screw member and the female screw side stopper provided on the female screw member can be more easily and accurately always constant.

これにより、ネジ締め付け時、例えば、弁閉時において、雄ネジ部材の雄ネジ側ストッパーと、雌ネジ部材の雌ネジ側ストッパーとの当接距離、すなわち、当接面積が常に一定で、雄ネジ部材が過剰に回転して、締結状態となることがなく、ネジ送り機構を正常に作動することができ、しかも、部品点数が少なく、さらに複雑な工程が不要でコストも低減できる。   Accordingly, when the screw is tightened, for example, when the valve is closed, the contact distance between the male screw side stopper of the male screw member and the female screw side stopper of the female screw member, that is, the contact area is always constant, and the male screw The member does not rotate excessively and is not in a fastening state, the screw feeding mechanism can be operated normally, and the number of parts is small, and a complicated process is unnecessary and the cost can be reduced.

本発明によれば、雌ネジ部材に設けた雌ネジ側ストッパーの位置Ｐ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２が、中心角度αが一定の角度になるように設定するとともに、雌ネジ部材に設けた雌ネジ側ストッパーの高さ位置Ｑ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め高さ位置Ｑ２との距離Ｓが、一定の距離になるように設定されている。   According to the present invention, with respect to the position P1 of the female screw side stopper provided on the female screw member, the threading start position P2 of the female screw formed on the female screw member is such that the central angle α is a constant angle. And the distance S between the height position Q1 of the female screw side stopper provided on the female screw member and the height position Q2 of the female screw formed on the female screw member is constant. It is set to be.

従って、雄ネジ部材に設けた雄ネジ側ストッパーと、雌ネジ部材に設けた雌ネジ側ストッパーとの相対位置が一定となる。   Therefore, the relative position between the male screw side stopper provided on the male screw member and the female screw side stopper provided on the female screw member is constant.

これにより、ネジ締め付け時、例えば、弁閉時において、雄ネジ部材の雄ネジ側ストッパーと、雌ネジ部材の雌ネジ側ストッパーとの当接距離、すなわち、当接面積が常に一定で、雄ネジ部材が過剰に回転して、締結状態となることがなく、ネジ送り機構を正常に作動することができ、しかも、部品点数が少なく、複雑な工程が不要でコストも低減できる。   Accordingly, when the screw is tightened, for example, when the valve is closed, the contact distance between the male screw side stopper of the male screw member and the female screw side stopper of the female screw member, that is, the contact area is always constant, and the male screw The member does not rotate excessively and is not in a fastening state, the screw feeding mechanism can be operated normally, and the number of parts is small, a complicated process is unnecessary, and the cost can be reduced.

しかも、雌ネジ部材が、雌ネジが形成された雌ネジ部材本体と、雌ネジ部材本体に装着され、雌ネジ側ストッパーが形成された雌ネジ側ストッパー部材を備えている。   Moreover, the female screw member includes a female screw member main body in which the female screw is formed, and a female screw side stopper member that is attached to the female screw member main body and in which the female screw side stopper is formed.

そして、雌ネジ側ストッパー部材が、雌ネジ部材本体の雌ネジ側位置合わせ部に対応し、雌ネジ側ストッパーの位置に対して、一定の中心角となるように形成された雌ネジストッパー側位置合わせ部を備えている。
Then, the female screw side stopper member corresponds to the female screw side positioning portion of the female screw member main body, and the female screw stopper side position is formed so as to have a constant central angle with respect to the position of the female screw side stopper. A mating section is provided.

これに対応して、雌ネジ部材本体の雌ネジ側位置合わせ部と、雌ネジ側ストッパー部材の雌ネジストッパー側位置合わせ部との位置が合致した状態で、雌ネジ側ストッパー部材を雌ネジ部材本体に装着している。   Correspondingly, in the state where the female screw side alignment portion of the female screw member main body and the female screw stopper side alignment portion of the female screw side stopper member are aligned, the female screw side stopper member is connected to the female screw member. It is attached to the main body.

これにより、雌ネジ部材本体の雌ネジ側位置合わせ部と、雌ネジ側ストッパー部材の雌ネジストッパー側位置合わせ部との位置が合致した状態で、雌ネジ側ストッパー部材を雌ネジ部材本体に装着するだけで、雌ネジ部材に設けた雌ネジ側ストッパーの位置Ｐ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２が、中心角度αが一定の角度になるように設定するとともに、雌ネジ部材に設けた雌ネジ側ストッパーの高さ位置Ｑ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め高さ位置Ｑ２との距離Ｓが、一定の距離になるように簡単に設定することができる。   As a result, the female screw side stopper member is mounted on the female screw member main body in a state where the female screw side alignment portion of the female screw member main body and the female screw stopper side alignment portion of the female screw side stopper member are aligned. By simply doing this, the threading start position P2 of the female screw formed on the female screw member is set so that the central angle α is a constant angle with respect to the position P1 of the female screw side stopper provided on the female screw member. In addition, the distance S between the height position Q1 of the female screw side stopper provided on the female screw member and the height position Q2 of the female screw formed on the female screw member is a constant distance. Can be set up easily.

その結果、雄ネジ部材に設けた雄ネジ側ストッパーと、雌ネジ部材に設けた雌ネジ側ストッパーとの相対位置を、容易に、しかも、正確に常に一定とすることができる。   As a result, the relative position between the male screw side stopper provided on the male screw member and the female screw side stopper provided on the female screw member can be easily and accurately always constant.

図１は、本発明のネジ送り機構の雌ネジ部材の縦断面図である。FIG. 1 is a longitudinal sectional view of a female screw member of the screw feeding mechanism of the present invention. 図２は、図１のＡ方向の端面図である。2 is an end view in the A direction of FIG. 図３は、本発明のネジ送り機構の雌ネジ部材の分解斜視図である。FIG. 3 is an exploded perspective view of the female screw member of the screw feeding mechanism of the present invention. 図４は、本発明のネジ送り機構の雌ネジ部材の雌ネジ部材本体の図１のＡ方向の端面図である。FIG. 4 is an end view of the female screw member main body of the female screw member of the screw feeding mechanism of the present invention in the A direction of FIG. 図５は、発明のネジ送り機構の雌ネジ部材の雌ネジ側ストッパー部材の図１のＡ方向の端面図である。FIG. 5 is an end view in the A direction of FIG. 1 of the female screw side stopper member of the female screw member of the screw feeding mechanism of the invention. 図６は、本発明のネジ送り機構の作動を説明する概略図である。FIG. 6 is a schematic diagram for explaining the operation of the screw feeding mechanism of the present invention. 図７は、図６のネジ送り機構のネジ締め付け時の部分拡大図である。FIG. 7 is a partially enlarged view of the screw feeding mechanism of FIG. 6 at the time of screw tightening. 図８は、従来のネジ送り機構１００の雌ネジ部材１０４の縦断面図である。FIG. 8 is a longitudinal sectional view of the female screw member 104 of the conventional screw feed mechanism 100. 図９は、図８のＡ方向の端面図である。FIG. 9 is an end view in the A direction of FIG. 図１０は、従来のネジ送り機構１００の作動を説明する概略図である。FIG. 10 is a schematic diagram for explaining the operation of the conventional screw feed mechanism 100. 図１１は、図１０のネジ送り機構１００のネジ締め付け時の部分拡大図である。FIG. 11 is a partially enlarged view of the screw feed mechanism 100 of FIG. 図１２は、図１０のネジ送り機構１００のネジ締め付け時の部分拡大図である。FIG. 12 is a partially enlarged view of the screw feeding mechanism 100 of FIG. 10 at the time of screw tightening. 図１３は、図１０のネジ送り機構１００のネジ締め付け時の部分拡大図である。FIG. 13 is a partially enlarged view of the screw feeding mechanism 100 of FIG. 図１４は、図１０のネジ送り機構１００のネジ締め付け時の部分拡大図である。FIG. 14 is a partially enlarged view of the screw feeding mechanism 100 of FIG.

以下、本発明の実施の形態（実施例）を図面に基づいてより詳細に説明する。   Hereinafter, embodiments (examples) of the present invention will be described in more detail with reference to the drawings.

図１は、本発明のネジ送り機構の雌ネジ部材の縦断面図、図２は、図１のＡ方向の端面図、図３は、本発明のネジ送り機構の雌ネジ部材の分解斜視図、図４は、本発明のネジ送り機構の雌ネジ部材の雌ネジ部材本体の図１のＡ方向の端面図、図５は、発明のネジ送り機構の雌ネジ部材の雌ネジ側ストッパー部材の図１のＡ方向の端面図、図６は、本発明のネジ送り機構の作動を説明する概略図、図７は、図６のネジ送り機構のネジ締め付け時の部分拡大図である。   1 is a longitudinal sectional view of a female screw member of the screw feed mechanism of the present invention, FIG. 2 is an end view in the direction A of FIG. 1, and FIG. 3 is an exploded perspective view of the female screw member of the screw feed mechanism of the present invention. 4 is an end view of the female screw member main body of the female screw member of the screw feeding mechanism of the present invention in the direction A in FIG. 1, and FIG. 5 is a diagram of the female screw side stopper member of the female screw member of the screw feeding mechanism of the present invention. 1 is an end view in the direction A, FIG. 6 is a schematic diagram for explaining the operation of the screw feed mechanism of the present invention, and FIG. 7 is a partially enlarged view of the screw feed mechanism of FIG.

図１〜図７において、符号１０は、全体で本発明のネジ送り機構を示している。   1 to 7, reference numeral 10 indicates the screw feeding mechanism of the present invention as a whole.

図６に示したように、ネジ送り機構１０は、雄ネジ部材１２と、雌ネジ部材１４とから構成されている。   As shown in FIG. 6, the screw feeding mechanism 10 includes a male screw member 12 and a female screw member 14.

そして、雌ネジ部材１４は、図１〜図５に示したように、略筒状の雌ネジ部材本体１６を備えており、この雌ネジ部材本体１６の内部には、内周側に雌ネジ１８が形成されている。また、雌ネジ部材本体１６の雄ネジ部材１２側の一端には、雌ネジ部材本体１６よりも小径の嵌合部２０が形成されている。   As shown in FIGS. 1 to 5, the female screw member 14 includes a substantially cylindrical female screw member main body 16, and the female screw member main body 16 has a female screw on the inner peripheral side. 18 is formed. A fitting portion 20 having a smaller diameter than the female screw member main body 16 is formed at one end of the female screw member main body 16 on the male screw member 12 side.

この嵌合部２０には、図２〜図４に示したように、雌ネジ側位置合わせ部２２が形成されており、雌ネジ側位置合わせ部２２は、雌ネジ部材１４に形成された雌ネジ１８のネジ切始め位置Ｐ２に対応した位置に形成されている。   As shown in FIGS. 2 to 4, a female screw side alignment portion 22 is formed in the fitting portion 20, and the female screw side alignment portion 22 is a female screw formed on the female screw member 14. The screw 18 is formed at a position corresponding to the screw cutting start position P2.

すなわち、この実施例では、雌ネジ側位置合わせ部２２は、雌ネジ部材１４に形成された雌ネジ１８のネジ切始め位置Ｐ２に合致する位置に形成されている。   That is, in this embodiment, the female screw side alignment portion 22 is formed at a position that matches the screw cutting start position P2 of the female screw 18 formed on the female screw member 14.

なお、この実施例の場合には、図３に示したように、雌ネジ側位置合わせ部２２は、スリット形状の雌ネジ側切欠部２４から構成されている。   In the case of this embodiment, as shown in FIG. 3, the female screw side alignment portion 22 includes a slit-shaped female screw side cutout portion 24.

また、図１〜図３、図５に示したように、雌ネジ部材１４は、雌ネジ部材本体１６の嵌合部２０の外周に装着される雌ネジ側ストッパー部材２６を備えている。この雌ネジ側ストッパー部材２６には、図３、図５に示したように、外方に略扇形状に突設した雌ネジ側ストッパー２８が外方に突設するように形成されている。   As shown in FIGS. 1 to 3 and 5, the female screw member 14 includes a female screw-side stopper member 26 that is attached to the outer periphery of the fitting portion 20 of the female screw member main body 16. As shown in FIGS. 3 and 5, the female screw side stopper member 26 is formed with a female screw side stopper 28 projecting outward in a substantially fan shape so as to project outward.

そして、雌ネジ側ストッパー部材２６には、雌ネジ部材本体１６の雌ネジ側位置合わせ部２２に対応して、雌ネジストッパー側位置合わせ部３０が形成されている。この実施例の場合、雌ネジストッパー側位置合わせ部３０は、雌ネジ側位置合わせ部２２の雌ネジ側切欠部２４に嵌合する突設形状の雌ネジストッパー側突設部３２から構成されている。   The female screw stopper member 26 is formed with a female screw stopper side alignment portion 30 corresponding to the female screw side alignment portion 22 of the female screw member main body 16. In the case of this embodiment, the female screw stopper side alignment part 30 is constituted by a female screw stopper side protruding part 32 having a protruding shape that fits into the female screw side cutout part 24 of the female screw side alignment part 22. Yes.

また、図５に示したように、雌ネジストッパー側位置合わせ部３０、すなわち、雌ネジストッパー側突設部３２が、雌ネジ側ストッパー２８のストッパー当接面２８ａの位置に対して、一定の中心角となるように形成されている。   Further, as shown in FIG. 5, the female screw stopper side alignment portion 30, that is, the female screw stopper side protruding portion 32, is fixed with respect to the position of the stopper contact surface 28 a of the female screw side stopper 28. The center angle is formed.

すなわち、実施例の場合には、雌ネジストッパー側位置合わせ部３０、すなわち、雌ネジストッパー側突設部３２が、雌ネジ側ストッパー２８のストッパー当接面２８ａの位置Ｐ１に対して、一定の中心角αとなるように形成されている。   That is, in the case of the embodiment, the female screw stopper side positioning portion 30, that is, the female screw stopper side protruding portion 32 is fixed with respect to the position P1 of the stopper contact surface 28a of the female screw side stopper 28. The central angle α is formed.

このように構成される本発明の雌ネジ部材１４は、図３の矢印で示したように、雌ネジ部材本体１６の雌ネジ側位置合わせ部２２（雌ネジ側切欠部２４）と、雌ネジ側ストッパー部材２６の雌ネジストッパー側位置合わせ部３０（雌ネジストッパー側突設部３２）との位置が合致した状態で、雌ネジ側ストッパー部材２６を雌ネジ部材本体１６に装着する。
The female screw member 14 of the present invention configured as described above includes the female screw side alignment portion 22 (female screw side cutout portion 24) of the female screw member main body 16, the female screw, as shown by the arrows in FIG. The female screw side stopper member 26 is attached to the female screw member main body 16 in a state where the position of the side stopper member 26 matches the female screw stopper side alignment portion 30 (female screw stopper side protruding portion 32).

すなわち、雌ネジ側ストッパー部材２６の雌ネジストッパー側位置合わせ部３０（雌ネジストッパー側突設部３２）が、雌ネジ部材本体１６の雌ネジ側位置合わせ部２２（雌ネジ側切欠部２４）に嵌合するように、雌ネジ側ストッパー部材２６を雌ネジ部材本体１６の小径の嵌合部２０の外周に装着して固定する。   That is, the female screw stopper side alignment portion 30 (female screw stopper side protruding portion 32) of the female screw side stopper member 26 is replaced with the female screw side alignment portion 22 (female screw side cutout portion 24) of the female screw member main body 16. The female screw side stopper member 26 is attached and fixed to the outer periphery of the small-diameter fitting portion 20 of the female screw member main body 16 so as to be fitted to each other.

なお、この場合、雌ネジ側ストッパー部材２６を雌ネジ部材本体１６に装着して固定する方法としては、特に限定されるものではなく、例えば、圧入、溶着、成形、かしめ加工などによって行うことができる。   In this case, the method of attaching and fixing the female screw side stopper member 26 to the female screw member main body 16 is not particularly limited, and may be performed by, for example, press fitting, welding, molding, caulking, or the like. it can.

また、図１、図２に示したように、雌ネジ側ストッパー部材２６を雌ネジ部材本体１６に装着した状態では、雌ネジ側ストッパー部材２６に設けた雌ネジ側ストッパー２８のストッパー当接面２８ａの位置Ｐ１に対して、雌ネジ部材１４に形成された雌ネジ１８のネジ切始め位置Ｐ２が、中心角度αが一定の角度になるように設定されている。   As shown in FIGS. 1 and 2, when the female screw side stopper member 26 is attached to the female screw member main body 16, the stopper contact surface of the female screw side stopper 28 provided on the female screw side stopper member 26. The threading start position P2 of the female screw 18 formed on the female screw member 14 is set so that the central angle α is a constant angle with respect to the position P1 of 28a.

また、図１、図３に示したように、雌ネジ側ストッパー部材２６に設けた雌ネジ側ストッパー２８の高さ位置Ｑ１に対して、雌ネジ部材１４に形成された雌ネジ１８のネジ切始め高さ位置Ｑ２との距離Ｓが、一定の距離になるように設定している。
Further, as shown in FIGS. 1 and 3, the threading of the female screw 18 formed on the female screw member 14 with respect to the height position Q1 of the female screw side stopper 28 provided on the female screw side stopper member 26 is performed. The distance S from the initial height position Q2 is set to be a constant distance.

すなわち、この実施例の場合には、図１、図３に示したように、雌ネジ側ストッパー部材２６の端部２６ａが、雌ネジ部材本体１６の小径の嵌合部２０の段部２０ａに当接した状態で、雌ネジ側ストッパー部材２６に設けた雌ネジ側ストッパー２８の高さ位置Ｑ１に対して、雌ネジ部材１４に形成された雌ネジ１８のネジ切始め高さ位置Ｑ２との距離Ｓが、一定の距離になるように設定されている。
That is, in the case of this embodiment, as shown in FIGS. 1 and 3, the end portion 26 a of the female screw side stopper member 26 is connected to the step portion 20 a of the small diameter fitting portion 20 of the female screw member main body 16. In the state of contact, the height position Q1 of the female screw side stopper 28 provided on the female screw side stopper member 26 is compared with the height position Q2 at which the female screw 18 formed on the female screw member 14 starts to be cut. The distance S is set to be a constant distance.

なお、この場合、図示しないが、雌ネジ部材本体１６の雌ネジ側位置合わせ部２２（雌ネジ側切欠部２４）と、雌ネジ側ストッパー部材２６の雌ネジストッパー側位置合わせ部３０（雌ネジストッパー側突設部３２）との当接高さ位置を調節することによって、雌ネジ側ストッパー部材２６に設けた雌ネジ側ストッパー２８の高さ位置Ｑ１に対して、雌ネジ部材１４に形成された雌ネジ１８のネジ切始め高さ位置Ｑ２との距離Ｓが、一定の距離になるように設定することも可能である。
In this case, although not shown, the female screw side alignment portion 22 (female screw side cutout portion 24) of the female screw member main body 16 and the female screw stopper side alignment portion 30 (female screw side) of the female screw side stopper member 26 are provided. By adjusting the contact height position with the stopper-side protruding portion 32), the female screw member 14 is formed with respect to the height position Q1 of the female screw-side stopper 28 provided on the female screw-side stopper member 26. It is also possible to set the distance S between the female screw 18 and the height position Q2 at the beginning of threading to be a constant distance.

一方、図６に示したように、雄ネジ部材１２は、略円柱形状であり、大径の基端部３４と、この基端部３４の先端に形成されたフランジ３６を備えている。また、フランジ３６の先端側には、雌ネジ部材本体１６の内周に挿入される小径部３８を備えている。さらに、小径部３８の先端側の外周には、雌ネジ部材本体１６の雌ネジ１８と螺合する雄ネジ４０が形成されている。   On the other hand, as shown in FIG. 6, the male screw member 12 has a substantially cylindrical shape, and includes a large-diameter base end portion 34 and a flange 36 formed at the tip end of the base end portion 34. Further, a small-diameter portion 38 that is inserted into the inner periphery of the female screw member main body 16 is provided on the distal end side of the flange 36. Furthermore, a male screw 40 that is screwed with the female screw 18 of the female screw member main body 16 is formed on the outer periphery on the distal end side of the small diameter portion 38.

そして、雄ネジ部材１２のフランジ３６には、先端側に突設するように形成された雄ネジ側ストッパー４２が形成されている。   A male thread side stopper 42 is formed on the flange 36 of the male thread member 12 so as to project from the distal end side.

このように構成されるネジ送り機構１０では、図示しないステッピングモーターにより、雄ネジ部材１２が、図６の矢印Ｂで示したように回転することによって、雄ネジ部材１２の先端に形成された雄ネジ４０が、雌ネジ部材１４に形成された雌ネジ１８に螺合する。
In the screw feed mechanism 10 configured as described above, the male screw member 12 is rotated as shown by an arrow B in FIG. The screw 40 is screwed into the female screw 18 formed on the female screw member 14.

これによって、雄ネジ部材１２が、図６の矢印Ｃ方向に移動することによって、例えば、電動弁などの制御弁において、流量を制御するようになっている。
As a result, the male screw member 12 moves in the direction of arrow C in FIG. 6 to control the flow rate, for example, in a control valve such as an electric valve.

ところで、従来のネジ送り機構１００について説明したように、図１２に示したように、ネジ締め付け時、例えば、弁閉時において、雄ネジ部材１０２の雄ネジ側ストッパー１２４と、雌ネジ部材１０４の雌ネジ側ストッパー１１４との当接距離Ｒ、すなわち当接面積が、小さい場合には、耐久性が低下して繰り返しの使用によって、雄ネジ側ストッパー１２４と、雌ネジ側ストッパー１１４とが摩耗損傷してしまう。   By the way, as described for the conventional screw feed mechanism 100, as shown in FIG. 12, when the screw is tightened, for example, when the valve is closed, the male screw side stopper 124 of the male screw member 102 and the female screw member 104 are When the contact distance R with the female screw side stopper 114, that is, the contact area is small, the durability decreases and the male screw side stopper 124 and the female screw side stopper 114 are worn and damaged by repeated use. Resulting in.

これによって、図１３に示したように、雄ネジ部材１０２の雄ネジ側ストッパー１２４と、雌ネジ部材１０４の雌ネジ側ストッパー１１４とが当接しない状態となって、ストッパーとして機能せず、雄ネジ部材１０２が過剰に回転して、締結状態となり、ネジ送り機構１００が正常に作動しないおそれがある。   As a result, as shown in FIG. 13, the male screw-side stopper 124 of the male screw member 102 and the female screw-side stopper 114 of the female screw member 104 are not in contact with each other, and do not function as a stopper. There is a possibility that the screw member 102 rotates excessively to be in a fastening state, and the screw feed mechanism 100 does not operate normally.

また、不適切な状態で組まれた場合に、当初から図１３に示したように、雄ネジ部材１０２の雄ネジ側ストッパー１２４と、雌ネジ部材１０４の雌ネジ側ストッパー１１４とが当接しない状態となって、ストッパーとして機能せず、雌ネジ部材１０４が過剰に回転して、締結状態となり、ネジ送り機構１００が正常に作動しない場合もある。   Further, when assembled in an inappropriate state, as shown in FIG. 13 from the beginning, the male screw side stopper 124 of the male screw member 102 and the female screw side stopper 114 of the female screw member 104 do not contact each other. In some cases, the screw does not function as a stopper, the female screw member 104 rotates excessively, and the screw feeding mechanism 100 does not operate normally.

さらに、図１４に示したように、ネジ締め付け時、例えば、弁閉時において、雄ネジ部材１０２の雄ネジ側ストッパー１２４と、雌ネジ部材１０４の雌ネジ側ストッパー１１４とが当接する前に、雄ネジ部材１０２が過剰に回転して、締結状態となり、ネジ送り機構１００が正常に作動しないおそれがある。   Furthermore, as shown in FIG. 14, when the screw is tightened, for example, when the valve is closed, before the male screw side stopper 124 of the male screw member 102 and the female screw side stopper 114 of the female screw member 104 abut, There is a possibility that the male screw member 102 rotates excessively and is in a fastening state, and the screw feeding mechanism 100 does not operate normally.

このため、前述したように、図１、図２に示したように、雌ネジ側ストッパー部材２６を雌ネジ部材本体１６に装着した状態では、雌ネジ側ストッパー部材２６に設けた雌ネジ側ストッパー２８のストッパー当接面２８ａの位置Ｐ１に対して、雌ネジ部材１４に形成された雌ネジ１８のネジ切始め位置Ｐ２が、中心角度αが一定の角度になるように設定されている。   Therefore, as described above, in the state where the female screw side stopper member 26 is mounted on the female screw member main body 16, as shown in FIGS. 1 and 2, the female screw side stopper provided on the female screw side stopper member 26 is provided. With respect to the position P1 of the stopper contact surface 28a of 28, the threading start position P2 of the female screw 18 formed on the female screw member 14 is set so that the center angle α is a constant angle.

また、前述したように、図１、図３に示したように、雌ネジ側ストッパー部材２６の端部２６ａが、雌ネジ部材本体１６の小径の嵌合部２０の段部２０ａに当接した状態で、雌ネジ側ストッパー部材２６に設けた雌ネジ側ストッパー２８の高さ位置Ｑ１に対して、雌ネジ部材１４に形成された雌ネジ１８のネジ切始め高さ位置Ｑ２との距離Ｓが、一定の距離になるように設定されている。
Further, as described above, as shown in FIGS. 1 and 3, the end portion 26 a of the female screw-side stopper member 26 is in contact with the stepped portion 20 a of the small-diameter fitting portion 20 of the female screw member main body 16. In this state, the distance S between the height position Q1 of the female screw side stopper 28 provided on the female screw side stopper member 26 and the thread cutting start height position Q2 of the female screw 18 formed on the female screw member 14 is , Is set to be a certain distance.

このように構成することによって、図７に示したように、ネジ締め付け時、例えば、弁閉時において、ネジの過剰の回転による締結を防止するために、雄ネジ部材１２と雌ネジ部材１４とが締結してしまう直前に、雄ネジ部材１２の雄ネジ側ストッパー４２が、雌ネジ部材１４の雌ネジ側ストッパー２８に当接して、ネジ送り機構１０の駆動範囲を規制することができるようになる。   By configuring in this way, as shown in FIG. 7, in order to prevent fastening due to excessive rotation of the screw when the screw is tightened, for example, when the valve is closed, the male screw member 12 and the female screw member 14 Immediately before the screw is fastened, the male screw side stopper 42 of the male screw member 12 abuts on the female screw side stopper 28 of the female screw member 14 so that the drive range of the screw feed mechanism 10 can be regulated. Become.

これにより、図７に示したように、ネジ締め付け時、例えば、弁閉時において、雄ネジ部材１２の雄ネジ側ストッパー４２と、雌ネジ部材１４の雌ネジ側ストッパー２８との当接距離Ｒ、すなわち、当接面積が常に一定で、雄ネジ部材１２が過剰に回転して、締結状態となることがなく、ネジ送り機構１０を正常に作動することができ、しかも、部品点数が少なく、複雑な工程が不要でコストも低減できる。   Accordingly, as shown in FIG. 7, when the screw is tightened, for example, when the valve is closed, the contact distance R between the male screw side stopper 42 of the male screw member 12 and the female screw side stopper 28 of the female screw member 14. That is, the contact area is always constant, the male screw member 12 rotates excessively and does not enter the fastening state, the screw feeding mechanism 10 can be operated normally, and the number of parts is small. Complex processes are not required and costs can be reduced.

例えば、雌ネジ部材１４の雌ネジ部材本体１６、雌ネジ側ストッパー部材２６の材質としては、特に限定されるものではなく、金属、樹脂などを採用することができる。   For example, the material of the female screw member main body 16 and the female screw side stopper member 26 of the female screw member 14 is not particularly limited, and metal, resin, or the like can be used.

以上、本発明の好ましい実施の態様を説明してきたが、本発明はこれに限定されることはない。例えば、上記実施例では、雌ネジ側位置合わせ部２２は、雌ネジ部材１４に形成された雌ネジ１８のネジ切始め位置Ｐ２に対応した位置に形成されている。   The preferred embodiment of the present invention has been described above, but the present invention is not limited to this. For example, in the above-described embodiment, the female screw side alignment portion 22 is formed at a position corresponding to the screw cutting start position P <b> 2 of the female screw 18 formed on the female screw member 14.

すなわち、上記実施例では、雌ネジ側位置合わせ部２２（雌ネジ側切欠部２４）は、雌ネジ部材１４に形成された雌ネジ１８のネジ切始め位置Ｐ２に合致する位置に形成したが、図示しないが、雌ネジ側位置合わせ部２２を、雌ネジ部材１４に形成された雌ネジ１８のネジ切始め位置Ｐ２に対応して一定の中心角ずらした位置に形成することも可能である。   That is, in the above embodiment, the female screw side alignment portion 22 (female screw side cutout portion 24) is formed at a position that matches the screw cutting start position P2 of the female screw 18 formed on the female screw member 14. Although not shown, it is possible to form the female screw side alignment portion 22 at a position shifted by a certain center angle corresponding to the screw cutting start position P2 of the female screw 18 formed on the female screw member 14.

この場合には、雌ネジストッパー側位置合わせ部３０（雌ネジストッパー側突設部３２）が、雌ネジ側ストッパー２８の位置に対して、一定の中心角となるように形成して、雌ネジ側ストッパー部材２６を雌ネジ部材本体１６に装着した状態で、雌ネジ側ストッパー部材２６に設けた雌ネジ側ストッパー２８のストッパー当接面２８ａの位置Ｐ１に対して、雌ネジ部材１４に形成された雌ネジ１８のネジ切始め位置Ｐ２が、中心角度αが一定の角度になるように設定すればよい。   In this case, the female screw stopper side alignment portion 30 (female screw stopper side protruding portion 32) is formed so as to have a constant central angle with respect to the position of the female screw side stopper 28, and the female screw With the side stopper member 26 mounted on the female screw member main body 16, the female screw member 14 is formed with respect to the position P1 of the stopper contact surface 28a of the female screw side stopper 28 provided on the female screw side stopper member 26. The threading start position P2 of the female screw 18 may be set so that the center angle α is a constant angle.

また、上記実施例では、雌ネジ側位置合わせ部２２をスリット形状の雌ネジ側切欠部２４とし、雌ネジ側ストッパー部材２６の雌ネジストッパー側位置合わせ部３０を突設形状の雌ネジストッパー側突設部３２とした。しかしながら、その逆に、雌ネジ側位置合わせ部２２を突設形状とし、雌ネジストッパー側位置合わせ部３０をスリット形状にすることも可能である。また、スリット形状とする他にも、凹部、凹溝形状とすることも可能である。   Further, in the above-described embodiment, the female screw side alignment portion 22 is the slit-shaped female screw side cutout portion 24, and the female screw stopper side alignment portion 30 of the female screw side stopper member 26 is on the protruding female screw stopper side. The projecting portion 32 was used. However, conversely, the female screw side alignment portion 22 can be formed in a protruding shape, and the female screw stopper side alignment portion 30 can be formed in a slit shape. Further, in addition to the slit shape, it is also possible to form a concave portion or a concave groove shape.

さらに、本発明は、電動弁以外にも、雄ネジ部材と雌ネジ部材との相対的な回転角度を規制するように構成した様々なネジ送り機構に適用することができるなど本発明の目的を逸脱しない範囲で種々の変更が可能である。   Furthermore, the present invention can be applied to various screw feeding mechanisms configured to restrict the relative rotation angle between the male screw member and the female screw member in addition to the electric valve. Various modifications can be made without departing from the scope.

本発明は、雄ネジ部材と雌ネジ部材とが螺合することによって、雄ネジ部材と雌ネジ部材との相対的な回転角度を規制するように構成したネジ送り機構、例えば、電動弁に用いられ、雄ネジ部材と雌ネジ部材とが螺合することによって、弁体が弁座に対して離接するように構成したネジ送り機構に用いられるネジ送り機構に適用することができる。   INDUSTRIAL APPLICABILITY The present invention is used in a screw feed mechanism configured to regulate a relative rotation angle between a male screw member and a female screw member by, for example, a motor-operated valve by screwing a male screw member and a female screw member. In addition, when the male screw member and the female screw member are screwed together, the present invention can be applied to a screw feed mechanism used in a screw feed mechanism configured such that the valve body is separated from and in contact with the valve seat.

１０ ネジ送り機構
１２ 雄ネジ部材
１４ 雌ネジ部材
１６ 雌ネジ部材本体
１８ 雌ネジ
２０ 嵌合部
２０ａ 段部
２２ 雌ネジ側位置合わせ部
２４ 雌ネジ側切欠部
２６ 雌ネジ側ストッパー部材
２６ａ 端部
２８ 雌ネジ側ストッパー
２８ａ ストッパー当接面
３０ 雌ネジストッパー側位置合わせ部
３２ 雌ネジストッパー側突設部
３４ 基端部
３６ フランジ
３８ 小径部
４０ 雄ネジ
４２ 雄ネジ側ストッパー
１００ ネジ送り機構
１０２ 雄ネジ部材
１０４ 雌ネジ部材
１０６ 雌ネジ本体
１０８ 雌ネジ
１１０ 雌ネジブッシュ
１１２ フランジ
１１４ 雌ネジ側ストッパー
１１６ 基端部
１１８ フランジ
１２０ 小径部
１２２ 雄ネジ
１２４ 雄ネジ側ストッパー DESCRIPTION OF SYMBOLS 10 Screw feed mechanism 12 Male thread member 14 Female thread member 16 Female thread member main body 18 Female thread 20 Fitting part 20a Step part 22 Female thread side alignment part 24 Female thread side notch part 26 Female thread side stopper member 26a End part 28 Female screw side stopper 28a Stopper contact surface 30 Female screw stopper side alignment portion 32 Female screw stopper side protruding portion 34 Base end portion 36 Flange 38 Small diameter portion 40 Male screw 42 Male screw side stopper 100 Screw feed mechanism 102 Male screw member 104 Female thread member 106 Female thread body 108 Female thread 110 Female thread bush 112 Flange 114 Female thread side stopper 116 Base end part 118 Flange 120 Small diameter part 122 Male thread 124 Male thread side stopper

Claims (4)

雄ネジ部材と雌ネジ部材とが螺合し、前記雄ネジ部材に設けた雄ネジ側ストッパーが、前記雌ネジ部材に設けた雌ネジ側ストッパーに当接することによって、雄ネジ部材と雌ネジ部材との相対的な回転角度を規制するように構成したネジ送り機構であって、
前記雌ネジ部材に設けた雌ネジ側ストッパーの位置Ｐ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２が、中心角度αが一定の角度になるように設定するとともに、
前記雌ネジ部材に設けた雌ネジ側ストッパーの高さ位置Ｑ１に対して、雌ネジ部材に形成された雌ネジのネジ切始め高さ位置Ｑ２との距離Ｓが、一定の距離になるように設定するように構成したネジ送り機構において、
前記雌ネジ部材が、雌ネジが形成された雌ネジ部材本体と、雌ネジ部材本体に装着され、雌ネジ側ストッパーが形成された雌ネジ側ストッパー部材を備え、
前記雌ネジ部材本体が、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２に対応した位置に形成された雌ネジ側位置合わせ部を備え、
前記雌ネジ側ストッパー部材が、雌ネジ部材本体の雌ネジ側位置合わせ部に対応し、雌ネジ側ストッパーの位置に対して、一定の中心角となるように形成された雌ネジストッパー側位置合わせ部を備え、
前記雌ネジ部材本体の雌ネジ側位置合わせ部と、雌ネジ側ストッパー部材の雌ネジストッパー側位置合わせ部との位置が合致した状態で、雌ネジ側ストッパー部材を雌ネジ部材本体に装着するとともに、
ネジ締め付け時、雄ネジ部材と雌ネジ部材とが締結してしまう直前に、雄ネジ部材の雄ネジ側ストッパーが、雌ネジ部材の雌ネジ側ストッパーに当接するとともに、
ネジ締め付け時、雄ネジ部材の雄ネジ側ストッパーと、雌ネジ部材の雌ネジ側ストッパーとの当接距離Ｒが一定であるように構成したことを特徴とするネジ送り機構。 The male screw member and the female screw member are screwed together, and the male screw side stopper provided on the male screw member abuts on the female screw side stopper provided on the female screw member. A screw feed mechanism configured to regulate the relative rotation angle with
With respect to the position P1 of the female screw side stopper provided on the female screw member, the screw cutting start position P2 of the female screw formed on the female screw member is set so that the center angle α is a constant angle,
The distance S between the height position Q1 of the female screw side stopper provided on the female screw member and the height position Q2 of the female screw formed on the female screw member is constant. In the screw feed mechanism configured to set,
The female screw member includes a female screw member main body in which a female screw is formed, and a female screw side stopper member that is attached to the female screw member main body and in which a female screw side stopper is formed,
The female screw member main body includes a female screw side alignment portion formed at a position corresponding to the screw cutting start position P2 of the female screw formed on the female screw member,
The female screw side stopper member corresponds to the female screw side alignment portion of the female screw member main body, and the female screw stopper side alignment is formed so as to have a constant central angle with respect to the position of the female screw side stopper. Part
And the female thread side positioning portion of the female screw member body, with the position matched with the female screw stopper-side positioning portion of the female screw side stopper member, thereby attaching the female screw side stopper member into the female screw member body ,
At the time of screw tightening, immediately before the male screw member and the female screw member are fastened, the male screw side stopper of the male screw member abuts on the female screw side stopper of the female screw member,
A screw feed mechanism , wherein a contact distance R between a male screw side stopper of a male screw member and a female screw side stopper of a female screw member is constant during screw tightening . 前記雌ネジ側位置合わせ部が、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２に合致する位置に形成されていることを特徴とする請求項１に記載のネジ送り機構。   2. The screw feeding mechanism according to claim 1, wherein the female screw side alignment portion is formed at a position matching a screw cutting start position P <b> 2 of the female screw formed on the female screw member. 前記雌ネジ側位置合わせ部が、雌ネジ部材に形成された雌ネジのネジ切始め位置Ｐ２に対応して一定の中心角ずらした位置に形成されていることを特徴とする請求項１に記載のネジ送り機構。   2. The female screw side alignment portion is formed at a position shifted by a certain center angle corresponding to a screw cutting start position P2 of the female screw formed on the female screw member. Screw feed mechanism. 前記雌ネジ部材本体の雌ネジ側位置合わせ部が、雌ネジ部材本体に形成された雌ネジ側切欠部であり、
前記雌ネジ側ストッパー部材の雌ネジストッパー側位置合わせ部が、前記雌ネジ側切欠部に嵌合するように、雌ネジ側ストッパー部材に形成された雌ネジストッパー側突設部であることを特徴とする請求項１から３のいずれかに記載のネジ送り機構。 The female screw side positioning portion of the female screw member main body is a female screw side cutout formed in the female screw member main body,
The female screw stopper side alignment portion of the female screw side stopper member is a female screw stopper side protruding portion formed on the female screw side stopper member so as to be fitted to the female screw side notch portion. The screw feed mechanism according to any one of claims 1 to 3.
JP2012141503A 2012-06-22 2012-06-22 Screw feed mechanism Expired - Fee Related JP5965220B2 (en)

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