JP2006162004A

JP2006162004A - Cylinder device with throttle mechanism for fluid under pressure

Info

Publication number: JP2006162004A
Application number: JP2004356983A
Authority: JP
Inventors: Ga Yoshimura; 画吉村
Original assignee: Kosmek KK
Current assignee: Kosmek KK
Priority date: 2004-12-09
Filing date: 2004-12-09
Publication date: 2006-06-22
Anticipated expiration: 2024-12-09
Also published as: JP4480564B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylinder device capable of improving maintenance performance of a throttle mechanism and reducing a manufacturing cost. <P>SOLUTION: A hydraulic passage 25 to a first hydraulic chamber 23 formed in a cylinder hole 8, is formed in a housing 7. An introduction area to the first hydraulic chamber 23 is an introduction passage 27 formed approximately in parallel with the piston advancing and retracting direction, and a rod member 30 is movably inserted into the introduction passage 27 to constitute the throttle mechanism. An upper half portion of the rod member 30 is inserted into the introduction passage 27, and its lower portion is loosely fitted to an engagement hole 34 of the piston 13. Thus the piston 13 can be prevented from being rotated with a connecting member 19 in the cylinder hole 8 when a connecting member 19 such as a bolt or a nut is fastened to the piston 13 by screwing or unfastened. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明はシリンダ装置に関し、特に圧力流体の流量を調節する絞り機構を備えたシリンダ装置に関する。 The present invention relates to a cylinder device, and more particularly to a cylinder device having a throttle mechanism that adjusts the flow rate of pressure fluid.

従来、シリンダを備えた装置本体にマニホールドを取り付け、そのマニホールドに絞り機構を設けた構成が採用されている。例えば、下記特許文献１には、シリンダを備えたクランプ装置に油圧供給口を設けたマニホールドを取り付け、そのマニホールドに絞り量調整自在な排油用の絞り弁を設けた構成が開示されている。 Conventionally, a configuration has been adopted in which a manifold is attached to an apparatus main body provided with a cylinder and a throttle mechanism is provided on the manifold. For example, Patent Document 1 below discloses a configuration in which a manifold provided with a hydraulic pressure supply port is attached to a clamp device provided with a cylinder, and a throttle valve for oil drainage whose throttle amount can be adjusted is provided on the manifold.

また、本発明者は、本発明に先立って提案された下記のクランプ装置を知っている。そのクランプ装置は、ハウジング内のシリンダ孔にピストンを挿入し、そのピストンを連結ボルトを介してクランプ作動部に連結したものである。そして、上記シリンダ孔に設けた油圧室に対して圧油を供給および排出することにより、上記クランプ作動部をクランプ状態とアンクランプ状態とに切り換えるのである。 The present inventor also knows the following clamping device proposed prior to the present invention. In the clamp device, a piston is inserted into a cylinder hole in a housing, and the piston is connected to a clamp operation unit via a connection bolt. Then, by supplying and discharging pressure oil to and from the hydraulic chamber provided in the cylinder hole, the clamp operating portion is switched between a clamped state and an unclamped state.

上記の先提案例のハウジング内には、ピストンとハウジングとにわたって共回り防止用のピンを挿入してある。これにより、前記の連結ボルトをピストンにネジ係合したり、そのネジ係合を解除するときに、その連結ボルトの回転に追従して上記ピストンが共回りするのを防止してある。
特開平１１−３４７８６９「クランプ装置」 A pin for preventing co-rotation is inserted between the piston and the housing in the housing of the previously proposed example. Thus, when the connecting bolt is screw-engaged with or released from the piston, the piston is prevented from co-rotating following the rotation of the connecting bolt.
JP 11-347869 “Clamping device”

上記特許文献１に示された従来技術であれば、下記のような課題がある。
油圧供給口を備えたマニホールドに一般的な絞り弁を設ける構成では、マニホールドを用意し、そのマニホールドに絞り弁を取り付ける手間がかかるうえに、絞り弁を設ける油圧通路の位置によっては、絞り弁のメンテナンスが困難になる課題がある。
特に、機械加工現場などのように切粉等の異物が多い過酷な条件で使用されるクランプ装置においては、絞り機構に異物が詰まるおそれがある。このため、シリンダ装置は、油圧通路の絞り機能を備えると共に、異物が詰まりにくく、メンテナンス性を良くすることが望まれていた。 If it is the prior art shown by the said patent document 1, there exist the following subjects.
In a configuration in which a general throttle valve is provided in a manifold having a hydraulic supply port, it takes time to prepare the manifold and install the throttle valve on the manifold, and depending on the position of the hydraulic passage where the throttle valve is installed, There are issues that make maintenance difficult.
In particular, in a clamping device that is used under harsh conditions with a large amount of foreign matter such as chips, such as at a machining site, there is a possibility that the squeezing mechanism may be clogged with foreign matter. For this reason, it has been desired that the cylinder device has a function of restricting the hydraulic passage, and is less likely to be clogged with foreign matter, so that the maintainability is improved.

また、前述の先提案例のクランプ装置において、ピストンの共回り防止ピンを設けることは、ハウジングとピストンの両方に加工が必要になり、製造工数及び部品数が増加してしまう課題がある。
さらに、ハウジング内に共回り防止ピンを固定する固定穴を設けることにより、その固定穴を避けてハウジング内に油圧通路、空気通路などを形成しなければならず、それらの圧力流体通路の経路設計が制限されるという課題がある。特に、小型のクランプ装置においてはハウジングも小型であるため、多数の圧力流体通路をハウジング内に設けなければならない場合には困難を伴うことになる。 Moreover, in the clamp apparatus of the above-mentioned prior proposal example, providing the joint rotation prevention pin of a piston requires a process on both a housing and a piston, and there exists a subject that a manufacturing man-hour and the number of parts will increase.
Furthermore, by providing a fixing hole for fixing the co-rotation prevention pin in the housing, it is necessary to form a hydraulic passage, an air passage, etc. in the housing while avoiding the fixing hole. There is a problem that is limited. In particular, since the housing is also small in a small clamp device, it is difficult to provide a large number of pressure fluid passages in the housing.

本発明は上記課題に鑑みてなされたものであり、本発明の目的は、上記課題を解決できるシリンダ装置を提供することにある。
具体的な目的の一例を示すと、以下の通りである。
（ａ）製造コストを低減できるとともに、圧力流体通路に設けられる絞り機構のメンテナンス性を高めたシリンダ装置を提供する。
（ｂ）圧力流体通路の経路設計の自由度を維持できるとともに、専用の共回り防止具を設ける個数を低減したり又はなくすことができるシリンダ装置を提供する。
（ｃ）上記シリンダ装置を搭載し、（ａ）（ｂ）に係る各目的を達成できる実用的な位置決め装置又はクランプ装置を提供する。
なお、上記に記載した以外の発明の課題、その解決手段及びその効果は、後述する明細書内の記載において詳しく説明する。 This invention is made | formed in view of the said subject, and the objective of this invention is providing the cylinder apparatus which can solve the said subject.
An example of a specific purpose is as follows.
(A) Provided is a cylinder device capable of reducing the manufacturing cost and improving the maintainability of a throttle mechanism provided in a pressure fluid passage.
(B) Provided is a cylinder device that can maintain the degree of freedom in the route design of the pressure fluid passage and can reduce or eliminate the number of dedicated co-rotation prevention tools.
(C) To provide a practical positioning device or clamping device that is equipped with the cylinder device and can achieve the respective objects according to (a) and (b).
In addition, the subject of invention other than having described above, its solution means, and its effect are demonstrated in detail in description in the specification mentioned later.

本発明は多面的に表現できるが、例えば、代表的なものを挙げると、次のように構成したものである。
下記各発明において、符号は対応関係を分かりやすくするために一例として示したものであり、本発明の各構成要素は、符号に係る形態に限定されないことは言うまでもない。
（第１発明）
本発明に係る圧力流体の絞り機構付きシリンダ装置は、例えば図１又は図４Ａに示すように次のように構成した。
ハウジング７内にシリンダ孔８を形成し、そのシリンダ孔８にピストン１３を進退可能に挿入し、そのピストン１３に連結部材１９をネジ係合によって連結し、その連結部材１９に作動手段２０を連結し、外部操作具が上記の連結部材１９の被操作部２２を介して前記ネジ係合を締結および解除するように構成したシリンダ装置であって、
上記ピストン１３に対面する圧力流体室２３を上記シリンダ孔８内に設け、その圧力流体室２３に連通される流体通路２５を上記ハウジング７に設け、その流体通路２５のうちの上記の圧力流体室２３への導入路２７を上記ピストン１３の進退方向へ延びるように形成し、その導入路２７にロッド部材３０を移動自在に挿入することによって絞り機構を構成した。 Although the present invention can be expressed in many ways, for example, typical ones are configured as follows.
In each of the following inventions, the reference numeral is shown as an example for easy understanding of the correspondence, and it goes without saying that each component of the present invention is not limited to the form related to the reference numeral.
(First invention)
The cylinder device with a pressure fluid throttle mechanism according to the present invention is configured as follows, for example, as shown in FIG. 1 or FIG. 4A.
A cylinder hole 8 is formed in the housing 7, a piston 13 is inserted into the cylinder hole 8 so as to be able to advance and retreat, a connecting member 19 is connected to the piston 13 by screw engagement, and an operating means 20 is connected to the connecting member 19. The external operating tool is a cylinder device configured to fasten and release the screw engagement via the operated portion 22 of the connecting member 19,
A pressure fluid chamber 23 facing the piston 13 is provided in the cylinder hole 8, a fluid passage 25 communicating with the pressure fluid chamber 23 is provided in the housing 7, and the pressure fluid chamber in the fluid passage 25 is provided. A throttle mechanism is configured by forming an introduction path 27 to 23 to extend in the advancing and retreating direction of the piston 13 and inserting a rod member 30 into the introduction path 27 so as to be movable.

本発明において、ピストンと連結部材のネジ係合としては、ピストンに雌ネジを設けるとともに連結部材に雄ネジを設けた構成と、ピストンに雄ネジを設けるとともに連結部材に雌ネジを設けた構成が考えられる。
上記の連結部材の一例としてはボルト式又はナット式が考えられる。ボルト式の連結部材の場合には、例えば六角穴からなる被操作部を六角レンチからなる外部操作具によって操作する。また、ナット式の連結部材である場合には、例えば、六角ナットの外周面からなる被操作部を六角スパナからなる外部操作具によって操作する。
本発明において、上記ロッド部材は、導入路を流れる圧力流体が絞り機能を発揮できる長さに設定される。
本明細書において、上記作動手段とはピストンの進退方向の力をシリンダ装置が使用される目的に応じた作用力に変換する機構を言う。 In the present invention, the screw engagement between the piston and the connecting member includes a configuration in which a female screw is provided in the piston and a male screw is provided in the connecting member, and a configuration in which a male screw is provided in the piston and a female screw is provided in the connecting member. Conceivable.
As an example of the connecting member, a bolt type or a nut type can be considered. In the case of a bolt-type connecting member, for example, an operated portion made of a hexagonal hole is operated by an external operation tool made of a hexagon wrench. Further, in the case of a nut-type connecting member, for example, the operated portion made of the outer peripheral surface of the hex nut is operated by an external operation tool made of a hex wrench.
In the present invention, the rod member is set to a length that allows the pressure fluid flowing through the introduction path to exhibit a throttling function.
In this specification, the said operation means means the mechanism which converts the force of the advancing / retreating direction of a piston into the acting force according to the objective for which a cylinder apparatus is used.

本発明であれば、以下の効果を有する。
ピストンの進退移動時に圧力流体室に対して圧力流体が流入及び流出することに伴ってロッド部材は導入路内を往復移動するので、これら導入路とロッド部材との隙間に異物が噛み込んだ場合でもその異物を外部へ排出できる。このため、絞り機構は、異物の詰まりを防止でき、長期間にわたってメンテナンスフリーにできる。
導入路にロッド部材を挿入するだけで絞り機構が構成できるので、製造コストを低減できる。 The present invention has the following effects.
The rod member reciprocates in the introduction path as the pressure fluid flows in and out of the pressure fluid chamber when the piston moves back and forth, so that foreign matter is caught in the gap between the introduction path and the rod member. But the foreign matter can be discharged to the outside. For this reason, the diaphragm mechanism can prevent clogging of foreign matters and can be maintenance-free for a long period of time.
Since the throttle mechanism can be configured simply by inserting the rod member into the introduction path, the manufacturing cost can be reduced.

（第２発明）
本発明を例えば、図１を用いて説明すると、上記発明において、前記の導入路２７を、前記ピストン１３の進退方向とほぼ平行に形成し、
そのピストン１３に、前記の導入路２７に対面する係合穴３４を設け、
前記ロッド部材３０の一端部を上記の導入路２７に移動自在に挿入するとともに同上ロッド部材３０の他端部を上記の係合穴３４に遊嵌し、
前記の連結部材１９の前記ネジ係合を締結および解除するときに、その連結部材１９の回転に追従して前記ピストン１３が共回りすることを上記ロッド部材３０によって防止したことを特徴とする (Second invention)
For example, when the present invention is described with reference to FIG. 1, in the above-described invention, the introduction path 27 is formed substantially parallel to the advancing / retreating direction of the piston 13,
The piston 13 is provided with an engagement hole 34 facing the introduction path 27,
One end of the rod member 30 is movably inserted into the introduction path 27 and the other end of the rod member 30 is loosely fitted into the engagement hole 34.
The rod member 30 prevents the piston 13 from co-rotating following the rotation of the connecting member 19 when the screw engagement of the connecting member 19 is fastened and released.

本発明であれば、以下の効果を有する。
ロッド部材を挿入された導入路は、ピストン進退方向とほぼ平行に形成されているので、圧力流体の流入および流出によってシリンダ孔内に突出するようにロッド部材が移動しても、ピストンの進退運動を妨げることなく、圧力流体通路を絞ることができる。
ロッド部材を、流体通路の絞り機構のみならず、共回り防止具としても機能させることができる。つまり、ロッド部材を絞り機構と共回り防止具の両方に用いることができるので、専用の共回り防止具を設ける個数を低減したり又はなくすことができる。
さらに、ハウジング内において導入路が設けられる位置と共回り防止具を設ける位置とを共用することができるので、ハウジング内に多数の圧力流体通路を設ける場合に経路設計の自由度を維持することができる。 The present invention has the following effects.
Since the introduction path into which the rod member is inserted is formed substantially parallel to the piston advance / retreat direction, even if the rod member moves so as to protrude into the cylinder hole due to the inflow and outflow of the pressure fluid, the advance / retreat motion of the piston The pressure fluid passage can be throttled without hindering.
The rod member can function not only as a throttle mechanism for the fluid passage but also as a co-rotation prevention tool. That is, since the rod member can be used for both the throttle mechanism and the co-rotation prevention device, the number of dedicated co-rotation prevention devices provided can be reduced or eliminated.
Furthermore, since the position where the introduction path is provided in the housing and the position where the co-rotation prevention device is provided can be shared, the freedom of path design can be maintained when a large number of pressure fluid passages are provided in the housing. it can.

（第３発明）
本発明は、上記各発明において、前記の流体通路２５の周壁に、前記の導入路２７内で前記ロッド部材３０が所定量以上に移動するのを規制する受け止め面２９を設けたことを特徴とする。
上記受け止め面は導入路内に設けられる場合と、導入路近くの流体通路内に設けられる場合が例示できる。
本発明であれば、絞り機構としてのロッド部材を本来動作すべき範囲内で良好に機能させることができる。 (Third invention)
The present invention is characterized in that, in each of the above inventions, a receiving surface 29 is provided on the peripheral wall of the fluid passage 25 to restrict the rod member 30 from moving beyond a predetermined amount in the introduction passage 27. To do.
The case where the said receiving surface is provided in an introduction path and the case where it is provided in the fluid passage near an introduction path can be illustrated.
If it is this invention, the rod member as an aperture mechanism can be made to function favorably within the range which should operate | move originally.

（第４発明）
本発明は、上記各発明において、前記の導入路２７を円形孔によって構成し、前記ロッド部材３０をほぼ円柱状に構成したことを特徴とする。
本発明であれば、孔の形成及びロッド部材の製造コストが低減でき、安価に絞り機構を構成することができる。 (Fourth invention)
The present invention is characterized in that, in each of the above inventions, the introduction path 27 is configured by a circular hole, and the rod member 30 is configured in a substantially cylindrical shape.
If it is this invention, the formation cost of a hole and the manufacturing cost of a rod member can be reduced, and a diaphragm | throttle mechanism can be comprised cheaply.

（第５発明）
本発明は、上記各発明において、前記ハウジング７内で前記シリンダ孔８に小径孔１４を連通させ、その小径孔１４に前記ピストン１３のロッド部１７を挿入し、
上記の小径孔１４の周壁部分に前記の導入路２７を設けたことを特徴とする。
本発明であれば、上記小径孔の周囲のスペースを有効に利用できるので、導入路の長さを確保することとハウジングの背丈を小さくすることを両立できる。 (Fifth invention)
The present invention, in each of the above-mentioned inventions, the small-diameter hole 14 is communicated with the cylinder hole 8 in the housing 7, and the rod portion 17 of the piston 13 is inserted into the small-diameter hole 14,
The introduction path 27 is provided in the peripheral wall portion of the small-diameter hole 14.
According to the present invention, since the space around the small-diameter hole can be used effectively, it is possible to ensure both the length of the introduction path and the height of the housing.

（第６発明）
本発明に係る圧力流体の絞り機構付きシリンダ装置は、図１と、図３Ｂから図３Ｅに示すように、次のように構成してもよい。
ハウジング７内にシリンダ孔８を形成し、そのシリンダ孔８にピストン１３を進退可能に挿入し、そのピストン１３に連結部材１９をネジ係合によって連結し、その連結部材１９に作動手段２０を連結し、外部操作具が上記の連結部材１９の被操作部２２を介して前記ネジ係合を締結および解除するように構成したシリンダ装置であって、
上記ピストン１３に対面する圧力流体室２３を上記シリンダ孔８内に設け、その圧力流体室２３に連通される流体通路２５を上記ハウジング７に設け、
上記ピストン１３の共回りを防止するロッド部材３０を上記ハウジング７に装着し、そのロッド部材３０に絞り通路４２，４３，４４，５１を設け、
前記の流体通路２５を上記の絞り通路４２，４３，４４，５１を介して前記の圧力流体室２３へ連通させた。
本発明において、共回り防止用ロッド部材がシリンダ装置に複数ある場合には、その複数のロッド部材のうち少なくとも一つのロッド部材を本発明に係る構成にすればよい。即ち、その少なくとも一つのロッド部材に絞り通路を形成するとともに、その絞り通路に流体通路を連通させ、ロッド部材をハウジングに装着できるようにすれば良い。
本発明において、ロッド部材を上記ハウジングに装着する形態は、完全に固定する形態と、若干移動できる形態で取り付ける場合の両方を含む。 (Sixth invention)
As shown in FIG. 1 and FIGS. 3B to 3E, the cylinder device with a pressure fluid throttle mechanism according to the present invention may be configured as follows.
A cylinder hole 8 is formed in the housing 7, a piston 13 is inserted into the cylinder hole 8 so as to be able to advance and retreat, a connecting member 19 is connected to the piston 13 by screw engagement, and an operating means 20 is connected to the connecting member 19. The external operating tool is a cylinder device configured to fasten and release the screw engagement via the operated portion 22 of the connecting member 19,
A pressure fluid chamber 23 facing the piston 13 is provided in the cylinder hole 8, and a fluid passage 25 communicating with the pressure fluid chamber 23 is provided in the housing 7.
A rod member 30 for preventing the piston 13 from rotating together is mounted on the housing 7, and throttle passages 42, 43, 44, 51 are provided in the rod member 30,
The fluid passage 25 is communicated with the pressure fluid chamber 23 via the throttle passages 42, 43, 44, 51.
In the present invention, when there are a plurality of co-rotation preventing rod members in the cylinder device, at least one rod member among the plurality of rod members may be configured according to the present invention. That is, a throttle passage may be formed in the at least one rod member, and a fluid passage may be communicated with the throttle passage so that the rod member can be attached to the housing.
In the present invention, the form in which the rod member is attached to the housing includes both a form in which the rod member is completely fixed and a case in which the rod member is attached in a form that can be moved slightly.

本発明であれば、ロッド部材が絞り機構としても機能するので、ハウジングにおいて共回り防止用ロッド部材を設ける位置と流体通路の位置を共用することができ、ハウジング内の他の圧力流体の経路設計の自由度を維持できる。
さらに、絞り通路をロッド部材に設けることで、シリンダ装置を製造する場合に構成部品数を低減することができる。 According to the present invention, since the rod member also functions as a throttle mechanism, the position where the co-rotation preventing rod member is provided in the housing and the position of the fluid passage can be shared, and the path design of other pressure fluids in the housing The degree of freedom can be maintained.
Furthermore, by providing the throttle passage in the rod member, the number of components can be reduced when the cylinder device is manufactured.

なお、上記各発明に係るシリンダ装置を位置決め装置又はクランプ装置に適用する場合には、ピストンの進退方向の力を拡径力および縮径力に変換する変換機構を前記作動手段に備えていることが好ましい。そのような変換機構としては、後述するコレット状のスリーブ部材を用いる方法や、径方向に突出した位置と退入された位置とを選択できるボールを用いる方法などがある。 When the cylinder device according to each of the above inventions is applied to a positioning device or a clamp device, the actuating means is provided with a conversion mechanism for converting the force in the piston advance / retreat direction into a diameter expansion force and a diameter reduction force. Is preferred. As such a conversion mechanism, there are a method using a collet-shaped sleeve member, which will be described later, and a method using a ball capable of selecting a radially protruding position and a retracted position.

以上、説明したように本発明であれば、製造コストを低減できるとともに、流体通路に設けられる絞り機構のメンテナンス性を高めることができる。また、流体通路の経路設計の自由度を維持できるとともに、専用の共回り防止用ロッド部材を設ける個数を低減し、又はなくすことができる。さらに、本発明に係るシリンダ装置を利用することにより実用的でメンテナンス性に優れる位置決め装置又はクランプ装置を提供できる。 As described above, according to the present invention, the manufacturing cost can be reduced and the maintainability of the throttle mechanism provided in the fluid passage can be improved. In addition, the degree of freedom in designing the passage of the fluid passage can be maintained, and the number of dedicated joint rotation prevention rod members can be reduced or eliminated. Furthermore, by using the cylinder device according to the present invention, a positioning device or a clamping device that is practical and excellent in maintainability can be provided.

以下、本発明の実施の形態を図面に基づき説明する。以下の実施形態においてはシリンダ装置を自動位置決め装置に適用した場合を例に示して説明する。
（第１実施形態）
図１と図２は本発明の第１実施形態を示している。この第１実施形態は、絞り機構と共回り防止機能を兼用した本発明の一実施形態である。
図１はリリース状態の位置決め装置の縦断面図であり、図２はロック状態の位置決め装置の縦断面図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, a case where the cylinder device is applied to an automatic positioning device will be described as an example.
(First embodiment)
1 and 2 show a first embodiment of the present invention. This first embodiment is an embodiment of the present invention that combines the aperture mechanism and the co-rotation prevention function.
FIG. 1 is a longitudinal sectional view of the positioning device in the released state, and FIG. 2 is a longitudinal sectional view of the positioning device in the locked state.

この位置決め装置は、基準部材としてのベースプレート１に取り付けられ、可動部材としてのワークパレット２を自動的に精密に位置決めする装置である。なお、本明細書の説明では、一例としてベースプレート１側を下方、ワークパレット２側を上方として説明する。この位置決め装置は、精密な位置決めを行う装置としてのみ使用される場合と、位置決め後にワークパレット２を強力に固定するクランプ装置と共用した構成で使用される場合とがある。 This positioning device is a device that is attached to a base plate 1 as a reference member and automatically and accurately positions a work pallet 2 as a movable member. In the description of the present specification, as an example, the base plate 1 side is described as the lower side, and the work pallet 2 side is described as the upper side. This positioning device may be used only as a device that performs precise positioning, or may be used in a configuration shared with a clamping device that firmly fixes the work pallet 2 after positioning.

ベースプレート１には位置決め装置の装着穴３が形成されている。
一方、上記ワークパレット２の被支持面４には円形の位置決め孔５が複数開口される。各位置決め孔５に後述するプラグ部１１が挿入される。なお、ここでは複数セットの位置決め孔５およびプラグ部１１のうち、１セットだけを示してある。 A mounting hole 3 for a positioning device is formed in the base plate 1.
On the other hand, a plurality of circular positioning holes 5 are opened in the supported surface 4 of the work pallet 2. A plug portion 11 described later is inserted into each positioning hole 5. Here, only one set of the plurality of sets of positioning holes 5 and plug portions 11 is shown.

シリンダ装置の本体部は主にハウジング７によって構成される。そのハウジング７は、装着穴３に圧入される円柱形状の嵌入部９と、ベースプレート１に固定するためのフランジ部１０と、前記プラグ部１１と、ワークパレット２の被支持面４を受ける支持面１２とを備えている。
ブランジ部１０は図示しない複数のボルトによってベースプレート１に固定される。 The main body of the cylinder device is mainly constituted by the housing 7. The housing 7 has a cylindrical fitting portion 9 that is press-fitted into the mounting hole 3, a flange portion 10 that is fixed to the base plate 1, the plug portion 11, and a support surface that receives the supported surface 4 of the work pallet 2. 12.
The flange portion 10 is fixed to the base plate 1 by a plurality of bolts (not shown).

プラグ部１１は、フランジ部１０の中央域から上方に向けて突出するように形成してあり、プラグ部１１の軸心は装着穴３の軸心とほぼ一致するように構成されている。
また、ハウジング７内にはピストン１３が保密状に挿入されるシリンダ孔８と、小径孔１４と、プラグ部１１の筒孔１５とが上向きに形成してある。 The plug portion 11 is formed so as to protrude upward from the central region of the flange portion 10, and the axial center of the plug portion 11 is configured to substantially coincide with the axial center of the mounting hole 3.
Further, a cylinder hole 8 into which the piston 13 is inserted in a tightly sealed manner, a small diameter hole 14, and a cylindrical hole 15 of the plug portion 11 are formed in the housing 7 upward.

ピストン１３の上部には、雌ネジ孔１６を備えたロッド部１７が形成され、その雌ネジ孔１６に連結ボルト（連結部材）１９を螺合締結させることによって、ピストン１３の往復運動力を後述の作動手段２０に伝えることができるように構成してある。ロッド部１７は前記小径孔１４内に収容される。
連結ボルト１９の頭部には、外部操作具としての六角レンチを係合させるレンチ孔（被操作部２２）が設けられており、六角レンチの操作によって、連結ボルト１９をロッド部１７の雌ネジ孔１６に締結又は解除させる。これによって、ピストン１３に対する連結ボルト１９のネジ係合を外した状態とネジ係合させた状態とを、位置決め装置の上方から切替えできるように構成してある。 A rod portion 17 having a female screw hole 16 is formed in the upper portion of the piston 13, and a connecting bolt (connecting member) 19 is screwed and fastened to the female screw hole 16, whereby the reciprocating force of the piston 13 is described later. It is comprised so that it can transmit to the operation means 20 of this. The rod portion 17 is accommodated in the small diameter hole 14.
The head of the connection bolt 19 is provided with a wrench hole (operated portion 22) for engaging a hexagon wrench as an external operation tool. The operation of the hexagon wrench allows the connection bolt 19 to be connected to the female screw of the rod portion 17. The hole 16 is fastened or released. Thus, the state in which the screw engagement of the connecting bolt 19 with respect to the piston 13 is removed and the state in which the screw engagement is performed can be switched from above the positioning device.

シリンダ孔８内で、ピストン上面４８とシリンダ上壁面４７との間には第１油圧室（第１の圧力流体室）２３が設けてある。作動用の圧油は、ベースプレート１に設けられたロックポート２４とハウジング７内の油圧通路２５とを介して第１油圧室２３に供給及び排出できるように構成してある。 In the cylinder hole 8, a first hydraulic chamber (first pressure fluid chamber) 23 is provided between the piston upper surface 48 and the cylinder upper wall surface 47. The pressure oil for operation can be supplied to and discharged from the first hydraulic chamber 23 via a lock port 24 provided in the base plate 1 and a hydraulic passage 25 in the housing 7.

第１油圧室２３への油圧通路（流体通路）２５は、ほぼ水平方向に穴開け加工された連通路２６と、ピストン進退方向（本実施形態の場合は垂直方向）に穴開け加工された導入路２７と、連通路２６と導入路２７とを交差させた接続部２８とで構成してある。図１に示す構成では交差角度は約９０゜に設定してあるが、交差しておればその交差角度は特に限定されるものではない。導入路２７は、前記の小径孔１４の周壁部分に形成してあり、ロッド部材３０の上部域が導入路２７内にフリーピストン状態で挿入される。接続部２８には受け止め面２９が設けられる。その受け止め面２８は、ロッド部材３０が所定範囲以上に移動することを規制するようにしてある。 A hydraulic passage (fluid passage) 25 to the first hydraulic chamber 23 includes a communication passage 26 that is drilled in a substantially horizontal direction, and an introduction that is drilled in a piston advancing / retreating direction (vertical direction in this embodiment). The passage 27 is composed of a connecting portion 28 that intersects the communication passage 26 and the introduction passage 27. In the configuration shown in FIG. 1, the crossing angle is set to about 90 °. However, the crossing angle is not particularly limited as long as it crosses. The introduction path 27 is formed in the peripheral wall portion of the small-diameter hole 14, and the upper region of the rod member 30 is inserted into the introduction path 27 in a free piston state. The connecting portion 28 is provided with a receiving surface 29. The receiving surface 28 is configured to restrict the rod member 30 from moving beyond a predetermined range.

一方、ピストン１３の下面と装着穴３の底面の間には第２油圧室（第２の圧力流体室）３２が形成され、ベースプレート１に設けられたリリースポート３３から圧油が供給および排出できるように構成してある。 On the other hand, a second hydraulic chamber (second pressure fluid chamber) 32 is formed between the lower surface of the piston 13 and the bottom surface of the mounting hole 3, and pressure oil can be supplied and discharged from a release port 33 provided in the base plate 1. It is constituted as follows.

ピストン上面４８には、導入路２７が形成された半径位置に対応するように係合穴３４が形成され、ロッド部材３０の下部域が係合穴３４にかなり遊びを持って嵌入（遊嵌）される。
ハウジング７内には空気供給通路４９が形成してあり、ベースプレート１のエア供給ポート５０からの空気が前記の筒孔１５を通って作動手段２０に噴射され、その作動手段２０に付着した切粉等の異物を吹き飛ばすことができるようになっている。 An engagement hole 34 is formed in the piston upper surface 48 so as to correspond to the radial position where the introduction path 27 is formed, and the lower region of the rod member 30 is fitted into the engagement hole 34 with a considerable play (free fitting). Is done.
An air supply passage 49 is formed in the housing 7, and air from the air supply port 50 of the base plate 1 is jetted to the operating means 20 through the cylindrical hole 15, and chips adhered to the operating means 20. Etc. can be blown away.

前記作動手段２０の一例としての位置決め作動部３６について説明する。
位置決め作動部３６は、プラグ部１１の外周に環状のスリーブ部材３７が配置された構成とされ、ピストン１３の往復動作に伴う連結ボルト１９の往復運動にしたがって、図１に示すリリース状態と図２に示すロック状態とを選択できるように構成してある。 A positioning operation unit 36 as an example of the operation means 20 will be described.
The positioning operation part 36 has a configuration in which an annular sleeve member 37 is disposed on the outer periphery of the plug part 11, and the release state shown in FIG. 1 and FIG. 2 according to the reciprocation of the connecting bolt 19 accompanying the reciprocation of the piston 13. The lock state shown in FIG.

具体的には、プラグ部１１の外周面には、上方に向かうに従ってプラグ部１１の軸心に近づく傾斜外面３８が設けられており、この傾斜外面３８とスリーブ部材３７の傾斜内面３９がテーパ係合している。スリーブ部材３７は、周方向の一部にスリット３７ａが形成されたコレット状に形成してあり、後述するように、弾性変形によって縮径状態と拡径状態の２つの状態を取り得る。 Specifically, the outer peripheral surface of the plug portion 11 is provided with an inclined outer surface 38 that approaches the axial center of the plug portion 11 as it goes upward, and the inclined outer surface 38 and the inclined inner surface 39 of the sleeve member 37 are tapered. Match. The sleeve member 37 is formed in a collet shape in which a slit 37a is formed in a part in the circumferential direction, and can take two states, a reduced diameter state and an enlarged diameter state, by elastic deformation, as will be described later.

本実施形態においては、導入路２７は円形孔とされ、図３Ａに示すように、ロッド部材３０はその円形孔の直径よりも僅かに小さい直径の円柱形で形成されており、その径の差による隙間４０を圧油が流れることによって油圧通路２５に流動抵抗を付与できるように構成してある。 In the present embodiment, the introduction path 27 is a circular hole, and as shown in FIG. 3A, the rod member 30 is formed in a cylindrical shape having a diameter slightly smaller than the diameter of the circular hole. A flow resistance can be imparted to the hydraulic passage 25 by pressure oil flowing through the gap 40.

この第１実施形態における動作について説明する。
まず、位置決め装置の基本的な動作について説明する。
図１に示すリリース状態では第１油圧室２３の圧油をロックポート２４から排油するとともに、第２油圧室３２に圧油を供給して、ピストン１３をシリンダ上壁面４７に当接した状態にする。ピストン１３がシリンダ上壁面４７に当接した状態では、連結ボルト１９は上方に移動し、スリーブ部材３７は縮径状態になっている。スリーブ部材３７をワークパレット２の位置決め孔５に挿入した状態では、ワークパレット２の位置決め孔５と上記スリーブ部材３７の外周面との間には半径隙間が形成されている。 The operation in the first embodiment will be described.
First, the basic operation of the positioning device will be described.
In the released state shown in FIG. 1, the pressure oil in the first hydraulic chamber 23 is discharged from the lock port 24, the pressure oil is supplied to the second hydraulic chamber 32, and the piston 13 is in contact with the cylinder upper wall surface 47. To. When the piston 13 is in contact with the cylinder upper wall surface 47, the connecting bolt 19 is moved upward, and the sleeve member 37 is in a reduced diameter state. In a state where the sleeve member 37 is inserted into the positioning hole 5 of the work pallet 2, a radial gap is formed between the positioning hole 5 of the work pallet 2 and the outer peripheral surface of the sleeve member 37.

この状態からワークパレット２をベースプレート１に位置決めする場合には、図２に示すように第２油圧室３２内の圧油をリリースポート３３から排出するとともに、第１油圧室２３に圧油を供給するとピストン１３は下降する。ピストン１３の下降に伴って連結ボルト１９も下降するので、スリーブ部材３７は拡径状態になり、位置決め孔５に密着して前記の半径隙間が消失する。 When positioning the work pallet 2 on the base plate 1 from this state, the pressure oil in the second hydraulic chamber 32 is discharged from the release port 33 and the pressure oil is supplied to the first hydraulic chamber 23 as shown in FIG. Then, the piston 13 descends. As the piston 13 is lowered, the connecting bolt 19 is also lowered, so that the sleeve member 37 is in a diameter-expanded state and is brought into close contact with the positioning hole 5 so that the radius gap disappears.

この密着によりプラグ部１１の軸心に対する位置決め孔５の軸心の位置ズレが是正される。この位置決めと同時に連結ボルト１９がスリーブ部材３７を介してワークパレット２を引き下げ、図示しないクランプ手段がワークパレット２をベースプレート１に強力に押圧する。
ロック駆動時にはワークパレット２の被支持面４がハウジング７の支持面１２に当接されることにより、上下方向の位置決めが行われるとともにスリーブ部材３７の過剰な下降が阻止される。 Due to this close contact, the displacement of the axial center of the positioning hole 5 with respect to the axial center of the plug portion 11 is corrected. Simultaneously with this positioning, the connecting bolt 19 pulls down the work pallet 2 via the sleeve member 37, and clamping means (not shown) strongly presses the work pallet 2 against the base plate 1.
When the lock drive is performed, the supported surface 4 of the work pallet 2 is brought into contact with the support surface 12 of the housing 7, whereby the vertical positioning is performed and the sleeve member 37 is prevented from being excessively lowered.

次に、本実施形態に係る特徴的な動作について説明する。
まず、導入路２７内にロッド部材３０が挿入され、その隙間４０（図３Ａ参照）によって油圧通路２５が絞られているので、前記ロック作動時にロックボート２４へ多量の圧油が供給された場合でも、ピストン１３の急激な下降が抑制される。
また、第１油圧室２３への圧油の供給および排出に伴って導入路２７内のロッド部材３０は僅かであるが上下に移動するので上記隙間４０に異物が溜りにくくなる。 Next, a characteristic operation according to the present embodiment will be described.
First, when the rod member 30 is inserted into the introduction passage 27 and the hydraulic passage 25 is throttled by the gap 40 (see FIG. 3A), a large amount of pressure oil is supplied to the lock boat 24 during the locking operation. However, the rapid lowering of the piston 13 is suppressed.
In addition, the rod member 30 in the introduction passage 27 moves slightly up and down with the supply and discharge of the pressure oil to the first hydraulic chamber 23, so that foreign matter does not easily accumulate in the gap 40.

係合穴３４にロッド部材３０の下部域が挿入され、導入路２７内にロッド部材３０の上部域が挿入されているので、メンテナンス時に六角レンチを連結ボルト１９のレンチ穴２２に係合させて、ボルト１９とピストン１３を締結又は解除する場合に、ピストン１３がボルト１９と共回りすることを防止することができ、油圧通路２５の絞り機構と共回り防止具とを兼用することができる。さらに、ロッド部材３０の上部域は導入路２７にフリーピストン状態で挿入され、ロッド部材３０の下部域も係合穴３４に隙間をもって挿入された構成なので、ピストン１３の移動に支障をきたすことはない。 Since the lower region of the rod member 30 is inserted into the engagement hole 34 and the upper region of the rod member 30 is inserted into the introduction path 27, the hexagon wrench is engaged with the wrench hole 22 of the connecting bolt 19 during maintenance. When the bolt 19 and the piston 13 are fastened or released, the piston 13 can be prevented from rotating together with the bolt 19, and the throttle mechanism of the hydraulic passage 25 can be used as a common rotation preventing tool. Furthermore, since the upper region of the rod member 30 is inserted into the introduction passage 27 in a free piston state, and the lower region of the rod member 30 is also inserted into the engagement hole 34 with a gap, it may hinder the movement of the piston 13. Absent.

油圧通路２５内に設けられる受け止め面２９を、連通路２６と導入路２７とが交差する接続部２８内に設けたので、導入路２７と連通路２６をそれぞれ２方向から直線形に穴開け加工する場合に自然に形成される接続面の一部を受け止め面２９とすることができる。したがって、受け止め面２９を簡単かつ安価に形成することができる。 Since the receiving surface 29 provided in the hydraulic passage 25 is provided in the connecting portion 28 where the communication path 26 and the introduction path 27 intersect, the introduction path 27 and the communication path 26 are respectively drilled in two straight lines. In this case, a part of the connection surface that is naturally formed can be received as the receiving surface 29. Therefore, the receiving surface 29 can be formed easily and inexpensively.

なお、ロッド部材３０は共回り防止具としても機能するので、導入路２７の断面形状に対応して導入路２７に接するロッド部材３０の横方向の接触面積を大きくできるような形状にして、導入路２７の壁面に局部的に大きな力がかからないようにする。例えば、図３Ａのように導入路２７の断面形状が円形ならば、ロッド部材３０の断面形状も略相似形の略円形にする方が好ましい。
また、好ましくはピストン１３のストロークを０．５ｍｍ〜５ｍｍの短い範囲に設定し、導入路２７内へのロッド部材３０の挿入長さを５ｍｍ〜２５ｍｍに設定し、係合穴３４へのロッド部材３０の挿入長さを３ｍｍ〜１５ｍｍに設定した方が良い。 Since the rod member 30 also functions as a co-rotation prevention tool, the rod member 30 is introduced in a shape corresponding to the cross-sectional shape of the introduction path 27 so that the contact area in the lateral direction of the rod member 30 in contact with the introduction path 27 can be increased. A large force is not locally applied to the wall surface of the road 27. For example, if the cross-sectional shape of the introduction path 27 is circular as shown in FIG. 3A, it is preferable that the cross-sectional shape of the rod member 30 is also substantially circular with a similar shape.
Preferably, the stroke of the piston 13 is set to a short range of 0.5 mm to 5 mm, the insertion length of the rod member 30 into the introduction path 27 is set to 5 mm to 25 mm, and the rod member to the engagement hole 34 is set. It is better to set the insertion length of 30 to 3 mm to 15 mm.

ピストン１３のストロークと導入路２７内へのロッド部材３０の挿入長さを上記各範囲に設定したので、ロッド部材３０を固定しなくても、絞り機構として十分に機能させることができる。つまり、ピストン１３のストロークを短くし、導入路２７内へのロッド部材３０の挿入長さを上記範囲内に設定することにより、絞り機構の流量を安定して制御することができる。また、ロッド部材３０に関して、導入路２７内への挿入長さと係合穴３４への挿入長さを上記各範囲に設定することにより、共回り防止具としての機能を十分に果たすことができる。 Since the stroke of the piston 13 and the insertion length of the rod member 30 into the introduction path 27 are set in the above ranges, the throttle mechanism can be sufficiently functioned without fixing the rod member 30. That is, the flow rate of the throttle mechanism can be stably controlled by shortening the stroke of the piston 13 and setting the insertion length of the rod member 30 into the introduction path 27 within the above range. Moreover, regarding the rod member 30, by setting the insertion length into the introduction path 27 and the insertion length into the engagement hole 34 within the above ranges, the function as a co-rotation prevention tool can be sufficiently achieved.

また、本実施形態であれば、絞り機構がハウジング７内の奥深く又はメンテナンスをしずらい位置にはない。つまり、シリンダ孔８からピストン１３を外してメンテナンスを行う場合に絞り機構としてのロッド部材３０は露出し、導入路２７から簡単に取り出すことができるので、異物の清掃などのメンテナンス作業を行いやすい。
特に、図１に示す構成では、ハウジング７に形成されるシリンダ孔８の下面は開口され、第２油圧室３２はピストン下面と装着穴３の底面の間に構成されているので、ピストン１３から連結ボルト１９を外して、フランジ部１０をベースプレート１から取り外し、前記開口からピストン１３を取り出すだけで、ハウジング７を一切分解することなく、絞り機構と共回り防止機構のメンテナンスが行える利点がある。この利点は第２油圧室３２の位置に皿バネなどを設けそのバネ力でリリース状態にする構成でも同様に享受できる。 Further, according to the present embodiment, the diaphragm mechanism is not deep in the housing 7 or at a position where maintenance is difficult. That is, when the maintenance is performed by removing the piston 13 from the cylinder hole 8, the rod member 30 as the throttle mechanism is exposed and can be easily taken out from the introduction path 27, so that maintenance work such as cleaning of foreign matters is easily performed.
In particular, in the configuration shown in FIG. 1, the lower surface of the cylinder hole 8 formed in the housing 7 is opened, and the second hydraulic chamber 32 is formed between the lower surface of the piston and the bottom surface of the mounting hole 3. There is an advantage that maintenance of the throttle mechanism and the corotation prevention mechanism can be performed without disassembling the housing 7 by simply removing the connecting bolt 19 and removing the flange portion 10 from the base plate 1 and taking out the piston 13 from the opening. This advantage can also be enjoyed in the same manner by a configuration in which a disc spring or the like is provided at the position of the second hydraulic chamber 32 so as to be in a released state by the spring force.

なお、ロッド部材３０の構成は、図３Ａの構成に限られることなく種々の変形を行うことが可能である。例えば、図３Ｂに示すようにロッド部材３０の周面の一部に長手方向に延びる切落し面４１を形成した構成や、図３Ｃに正面図で示すように周方向に螺旋状に凹設された螺旋通路４２を形成した構成でもよい。さらには、図３Ｄの正面図と、図３Ｅの平面図で示すように、ロッド部材３０の内部に軸方向に形成された細孔通路４３を設けるとともに、その細孔通路４３とロッド部材３０の外周とを連通させる抜き通路４４を設けた構成などが例示できる。この場合、細孔通路４３と抜き通路４４とで絞り通路を構成し、その絞り通路はロッド部材３０の内部に形成されていることになる。 The configuration of the rod member 30 is not limited to the configuration of FIG. 3A, and various modifications can be made. For example, as shown in FIG. 3B, a configuration in which a cut surface 41 extending in the longitudinal direction is formed on a part of the circumferential surface of the rod member 30, or is spirally recessed in the circumferential direction as shown in a front view in FIG. 3C. Alternatively, the spiral passage 42 may be formed. Further, as shown in the front view of FIG. 3D and the plan view of FIG. 3E, a pore passage 43 formed in the axial direction is provided inside the rod member 30, and the pore passage 43 and the rod member 30 For example, a configuration in which the extraction passage 44 that communicates with the outer periphery is provided. In this case, the narrow passage 43 and the extraction passage 44 constitute a throttle passage, and the throttle passage is formed inside the rod member 30.

（第２実施形態）
図４Ａ，図４Ｂは本発明の第２実施形態を説明するための図であり、図４Ａは位置決め装置の縦断面図、図４Ｂはその要部拡大断面図である。この第２実施形態において第１実施形態と同様の部材には同一の符号を付けてその説明は省略する。
この第２実施形態の特徴は、ピストン上面４８に係合穴３４（図１参照）を設けず、導入路２７に挿入されるロッド部材３０はピストン上面４８に当接した状態を維持する長さに設定されている点である。 (Second Embodiment)
4A and 4B are views for explaining a second embodiment of the present invention. FIG. 4A is a longitudinal sectional view of a positioning device, and FIG. 4B is an enlarged sectional view of an essential part thereof. In this 2nd Embodiment, the same code | symbol is attached | subjected to the member similar to 1st Embodiment, and the description is abbreviate | omitted.
The second embodiment is characterized in that the engagement hole 34 (see FIG. 1) is not provided in the piston upper surface 48 and the rod member 30 inserted into the introduction path 27 is maintained in a state in which the rod member 30 is in contact with the piston upper surface 48. It is a point set to.

この実施形態では、連結ボルト１９とピストン１３の共回りを防止するだけの専用の共回り防止具４５が設けられ、その専用の共回り防止具４５は導入路２７が設けられた周方向位置とは異なる位置に少なくとも一つ設けられている。即ち、専用の共回り防止具４５は、ハウジング７に形成された固定孔４６に嵌入したピンやボルトによって構成されており、この専用共回り防止具４５は従来技術のものと同じ構成が採用できる。 In this embodiment, a dedicated co-rotation prevention tool 45 that only prevents the joint bolt 19 and the piston 13 from co-rotating is provided, and the dedicated co-rotation prevention tool 45 has a circumferential position where the introduction path 27 is provided. Are provided at different positions. In other words, the dedicated co-rotation prevention tool 45 is configured by pins and bolts that are fitted into the fixing holes 46 formed in the housing 7, and this dedicated co-rotation prevention tool 45 can adopt the same configuration as that of the prior art. .

図４Ａに示すリリース状態では第２油圧室３２に圧油が供給され、ピストン１３がシリンダ上壁面４７に当接した状態になっているので、導入路２７内にロッド部材３０のほぼ全長が挿入された状態になっている。一方、図４Ｂに示すようにロック状態では、第１油圧室２３への圧油の供給に従って、ピストン１３はシリンダ孔８の下方位置に移動するので、ロッド部材３０は圧油の流れとともに下降してシリンダ上壁面４７から突出した状態になっている。
このように第２実施形態のロッド部材３０も絞り機構として機能するとともにピストン１３の上下動に伴って移動することになるので、ロッド部材３０と導入路２７の隙間に異物が詰まることを抑制することができる。
なお、上記の導入路２７は例示した垂直方向に形成することに代えて斜め方向へ延びるように形成してもよい。 In the released state shown in FIG. 4A, pressure oil is supplied to the second hydraulic chamber 32 and the piston 13 is in contact with the cylinder upper wall surface 47, so that almost the entire length of the rod member 30 is inserted into the introduction path 27. It is in the state that was done. On the other hand, in the locked state as shown in FIG. 4B, the piston 13 moves to a position below the cylinder hole 8 in accordance with the supply of the pressure oil to the first hydraulic chamber 23, so that the rod member 30 descends with the flow of the pressure oil. Thus, it protrudes from the cylinder upper wall surface 47.
Thus, the rod member 30 of the second embodiment also functions as a throttle mechanism and moves as the piston 13 moves up and down, so that foreign matter is prevented from clogging in the gap between the rod member 30 and the introduction path 27. be able to.
The introduction path 27 may be formed to extend in an oblique direction instead of being formed in the illustrated vertical direction.

（第３実施形態）
次に本発明の第３実施形態を図１、図３Ｄ及び図３Ｅを参照しつつ説明する。
この第３実施形態は、ピストン１３の共回りを防止するロッド部材３０をハウジング７に装着し、そのロッド部材３０に絞り通路を形成し、油圧通路２５を上記の絞り通路を介して第１油圧室２３へ連通させたことを特徴とする。 (Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS. 1, 3D and 3E.
In the third embodiment, a rod member 30 for preventing the piston 13 from rotating together is mounted on the housing 7, a throttle passage is formed in the rod member 30, and the hydraulic passage 25 is connected to the first hydraulic pressure via the throttle passage. It is characterized by communication with the chamber 23.

この第３実施形態の一構成例としては、第１実施形態において説明した図３Ｄ及び図３Ｅに示すように、ロッド部材３０に細孔通路４３と抜き通路４４を設け、そのロッド部材３０の上部域を導入路２７に圧入して固定することにより、本実施形態における共回り防止具として機能させることができる。
なお、ロッド部材３０の下部域をピストン１３の係合穴３４に遊嵌状態で係合させる構成は、第１実施形態の構成と同様である。
この構成であってもロッド部材３０は絞り機構としての機能と共回り防止具としての機能の両方を備えることができる。また、ロッド部材３０はシリンダ孔８からピストン１３を外す時に露出する構成になっているので、絞り機構のメンテナンス性が向上する。 As an example of the configuration of the third embodiment, as shown in FIGS. 3D and 3E described in the first embodiment, the rod member 30 is provided with a pore passage 43 and an extraction passage 44, and an upper portion of the rod member 30 is provided. By press-fitting the region into the introduction path 27 and fixing it, it can function as a co-rotation prevention tool in the present embodiment.
The configuration in which the lower region of the rod member 30 is engaged with the engagement hole 34 of the piston 13 in a loosely fitted state is the same as the configuration of the first embodiment.
Even with this configuration, the rod member 30 can have both a function as a throttle mechanism and a function as a co-rotation prevention tool. In addition, since the rod member 30 is exposed when the piston 13 is removed from the cylinder hole 8, the maintainability of the throttle mechanism is improved.

この第３実施形態の他の構成例としては、図３Ｂと図３Ｃに示すロッド部材３０の上部域を導入路２７に圧入してもよく、その場合はロッド部材３０の外周壁に絞り通路を構成した形態になる。即ち、図３Ｂでは、導入路２７の周壁と切落し面４１の間に形成される隙間通路５１が絞り通路になり、図３Ｃでは螺旋通路４２が絞り通路になる。 As another configuration example of the third embodiment, the upper region of the rod member 30 shown in FIGS. 3B and 3C may be press-fitted into the introduction path 27, and in that case, a throttle passage is formed in the outer peripheral wall of the rod member 30. It becomes a configured form. That is, in FIG. 3B, the gap passage 51 formed between the peripheral wall of the introduction passage 27 and the cut-off surface 41 is a throttle passage, and in FIG. 3C, the spiral passage 42 is a throttle passage.

上記実施形態は本発明の一例にすぎず、本発明の要旨内において適宜、構成を変更することが可能である。
例えば、上記の各実施形態では、連結部材としての連結ボルト１９の脚ネジ部をピストン１３のロッド部１７にネジ止めするようにしたが、これに代えて、上記の連結部材をナットによって構成してもよい。この場合、シリンダ装置の上部構造は、例えば次のように構成される。
上記ピストン１３の上記ロッド部１７を前記プラグ部１１の上端面よりも上方に突出させ、その突出部に雄ネジを形成し、連結部材としてのナットを上記の雄ネジにネジ係合させる。そして、上記ロッド部１７の上部と上記ナットとの間に、前記の位置決め作動部３６の上フランジ部を挟み付けて固定するのである。 The above embodiment is merely an example of the present invention, and the configuration can be appropriately changed within the gist of the present invention.
For example, in each of the embodiments described above, the leg screw portion of the connecting bolt 19 as the connecting member is screwed to the rod portion 17 of the piston 13. Instead, the connecting member is configured by a nut. May be. In this case, the upper structure of the cylinder device is configured as follows, for example.
The rod portion 17 of the piston 13 is projected upward from the upper end surface of the plug portion 11, a male screw is formed on the projecting portion, and a nut as a connecting member is screw-engaged with the male screw. The upper flange portion of the positioning operation portion 36 is sandwiched and fixed between the upper portion of the rod portion 17 and the nut.

また、上記圧力流体として圧油を例示したが、圧縮空気などによりピストンを駆動させることができる。また、上記実施形態では、シリンダ孔の上方位置と下方位置に圧力流体室を設け、ロック状態とリリース状態のそれぞれにおいて圧力流体で駆動する複動式を例示したが、本発明は、圧力流体でロック状態にしてバネ力でリリース状態にする方式や、バネ力でロック状態にして圧力流体でリリース状態にする、所謂、単動式のシリンダ装置でも適用が可能である。 Moreover, although the pressure oil was illustrated as said pressure fluid, a piston can be driven with compressed air. Further, in the above embodiment, the double-acting type in which the pressure fluid chambers are provided at the upper and lower positions of the cylinder hole and driven by the pressure fluid in each of the locked state and the released state is illustrated. The present invention can also be applied to a method in which a locked state is released with a spring force, or a so-called single-acting cylinder device that is locked with a spring force and released with a pressure fluid.

図１は本発明の第１実施形態に係る位置決め装置のリリース状態の縦断面図である。FIG. 1 is a longitudinal sectional view of a positioning device according to a first embodiment of the present invention in a released state. 図２は本発明の第１実施形態に係る位置決め装置のロック状態の縦断面図である。FIG. 2 is a longitudinal sectional view of the positioning device according to the first embodiment of the present invention in a locked state. 図３Ａは導入路に挿入されたロッド部材の横断面図である。FIG. 3A is a cross-sectional view of the rod member inserted into the introduction path. 図３Ｂは導入路に挿入された別のロッド部材の横断面図である。FIG. 3B is a cross-sectional view of another rod member inserted into the introduction path. 図３Ｃは螺旋通路が設けられた他のロッド部材の正面図である。FIG. 3C is a front view of another rod member provided with a spiral passage. 図３Ｄは内部に絞り通路が設けられたロッド部材の正面図である。FIG. 3D is a front view of the rod member in which the throttle passage is provided. 図３Ｅは図３Ｄに示されたロッド部材の平面図である。FIG. 3E is a plan view of the rod member shown in FIG. 3D. 図４Ａは本発明の第２実施形態に係る位置決め装置のリリース状態の縦断面図である。FIG. 4A is a longitudinal sectional view showing a released state of the positioning device according to the second embodiment of the present invention. 図４Ｂは第２実施形態に係る位置決め装置のロック状態の要部拡大断面図である。FIG. 4B is an enlarged cross-sectional view of a main part in a locked state of the positioning device according to the second embodiment.

Explanation of symbols

７…ハウジング、８…シリンダ孔、１３…ピストン、１４…小径孔、１９…連結ボルト（連結部材）、２０…作動手段、２２…被操作部（レンチ穴）、２３…第１油圧室（圧力流体室）、２５…油圧通路（流体通路）、２７…導入路、２９…受け止め面、３０…ロッド部材、３２…第２油圧室（圧力流体室）、３４…係合穴、３６…位置決め作動部、４２，４３，４４，５１…絞り通路。
DESCRIPTION OF SYMBOLS 7 ... Housing, 8 ... Cylinder hole, 13 ... Piston, 14 ... Small diameter hole, 19 ... Connection bolt (connection member), 20 ... Actuating means, 22 ... Operated part (wrench hole), 23 ... 1st hydraulic chamber (pressure) Fluid chamber), 25 ... hydraulic passage (fluid passage), 27 ... introduction passage, 29 ... receiving surface, 30 ... rod member, 32 ... second hydraulic chamber (pressure fluid chamber), 34 ... engagement hole, 36 ... positioning operation Part, 42, 43, 44, 51...

Claims

A cylinder hole (8) is formed in the housing (7), a piston (13) is inserted into the cylinder hole (8) so as to be able to advance and retract, and a connecting member (19) is connected to the piston (13) by screw engagement. Then, the actuating means (20) is connected to the connecting member (19), and the external operating tool is configured to fasten and release the screw engagement via the operated portion (22) of the connecting member (19). A cylinder device comprising:
A pressure fluid chamber (23) facing the piston (13) is provided in the cylinder hole (8), and a fluid passage (25) communicating with the pressure fluid chamber (23) is provided in the housing (7); An introduction path (27) to the pressure fluid chamber (23) of the fluid passage (25) is formed to extend in the advancing / retreating direction of the piston (13), and a rod member ( A cylinder device with a throttling mechanism for pressure fluid, characterized in that a throttling mechanism is configured by movably inserting 30).

The cylinder device with a pressure fluid throttle mechanism according to claim 1,
The introduction path (27) is formed substantially parallel to the advancing / retreating direction of the piston (13),
The piston (13) is provided with an engagement hole (34) facing the introduction path (27),
One end of the rod member (30) is movably inserted into the introduction path (27) and the other end of the rod member (30) is loosely fitted into the engagement hole (34).
When the screw engagement of the connecting member (19) is fastened and released, the rod member (30) causes the piston (13) to rotate along with the rotation of the connecting member (19). A cylinder device with a pressure fluid throttling mechanism, characterized in that it is prevented.

In the cylinder device with a pressure fluid throttle mechanism according to claim 1 or 2,
The peripheral wall of the fluid passage (25) is provided with a receiving surface (29) for restricting the rod member (30) from moving over a predetermined amount in the introduction passage (27). A cylinder device with a throttle mechanism for pressure fluid.

In the cylinder device with a pressure fluid throttle mechanism according to any one of claims 1 to 3,
A cylinder device with a pressure fluid throttling mechanism, wherein the introduction path (27) is configured by a circular hole, and the rod member (30) is configured in a substantially cylindrical shape.

In the cylinder device with a pressure fluid throttle mechanism according to any one of claims 1 to 4,
A small-diameter hole (14) is communicated with the cylinder hole (8) in the housing (7), and a rod portion (17) of the piston (13) is inserted into the small-diameter hole (14).
A cylinder device with a pressure fluid throttling mechanism, wherein the introduction passage (27) is provided in a peripheral wall portion of the small diameter hole (14).

A cylinder hole (8) is formed in the housing (7), a piston (13) is inserted into the cylinder hole (8) so as to be able to advance and retract, and a connecting member (19) is connected to the piston (13) by screw engagement. Then, the actuating means (20) is connected to the connecting member (19), and the external operating tool is configured to fasten and release the screw engagement via the operated portion (22) of the connecting member (19). A cylinder device comprising:
A pressure fluid chamber (23) facing the piston (13) is provided in the cylinder hole (8), and a fluid passage (25) communicating with the pressure fluid chamber (23) is provided in the housing (7);
A rod member (30) for preventing co-rotation of the piston (13) is mounted on the housing (7), and a throttle passage (42, 43, 44, 51) is provided in the rod member (30),
A cylinder device with a pressure fluid throttle mechanism, wherein the fluid passage (25) communicates with the pressure fluid chamber (23) through the throttle passage (42, 43, 44, 51). .