TW201819778A

TW201819778A - Cylinder device with force multiplier

Info

Publication number: TW201819778A
Application number: TW106131145A
Authority: TW
Inventors: 大谷健太
Original assignee: 日商克斯美庫股份有限公司
Priority date: 2016-11-16
Filing date: 2017-09-12
Publication date: 2018-06-01
Also published as: WO2018092377A1; JP6906240B2; JPWO2018092377A1; TWI724235B

Abstract

A cylinder device with an attached booster mechanism is provided with: an output member (29) that is connected to a second piston (8) so as to be movable in the axial direction and faces the second piston (8) at a prescribed distance (L) in the axial direction so as to be able to come in contact with same; and a biasing means (41), which is installed between the second piston (8) and the output member (29) and acts in the direction to separate the second piston (8) from the output member (29).

Description

附倍力機構的壓缸裝置Cylinder device with double force mechanism

[0001] 本發明，是關於附倍力機構的壓缸裝置。[0001] The present invention relates to a cylinder device of a double force mechanism.

[0002] 以往之附倍力機構的壓缸裝置，有著專利文獻（日本國特開2014-196828號公報）所記載者。該以往的技術，是構成如下。　　使環狀的第1活塞可於上下方向移動地***至殼體內。使第2活塞可於上下方向移動地***至該第1活塞的筒孔。從第2活塞使輸出構件往上方突出設置。將作用於第1活塞之往上方的按壓力藉由倍力機構來倍力變換並傳達至第2活塞。在將上述的壓缸裝置予以倍力驅動的行程途中，輸出構件會抵接於工件（按壓對象物）。 [先前技術文獻] 　　[0003] [專利文獻] 　　[專利文獻1] 日本國公開專利公報「特開 2014-196828號公報（參照圖1）（2014年10月16日公開）」[0002] A conventional pressure-cylinder device with a double force mechanism is described in a patent document (Japanese Patent Application Laid-Open No. 2014-196828). This conventional technology is structured as follows. The ring-shaped first piston is inserted into the housing so as to be movable in the vertical direction. The second piston is inserted into the bore of the first piston so as to be movable in the vertical direction. The output member is projected upward from the second piston. The pressing force acting upward on the first piston is converted by the double force mechanism to the second piston and transmitted to the second piston. During the stroke in which the above-mentioned cylinder device is driven by double force, the output member comes into contact with the workpiece (object to be pressed). [Prior Art Document] [0003] [Patent Document] [Patent Document 1] Japanese Laid-Open Patent Gazette "Japanese Patent Application Laid-Open No. 2014-196828 (refer to Fig. 1) (published on October 16, 2014)"

[發明所欲解決的課題] 　　[0004] 上述之以往的技術在以下的觀點還留有改良的餘地。　　上述的輸出構件與工件抵接時，在該抵接部分產生衝撃這點還有著改良的餘地。　　本發明的目的，是緩和附倍力機構的壓缸裝置的輸出構件對按壓對象物賦予的衝撃。 [用以解決課題的手段] 　　[0005] 為了達成上述目的，第1發明，例如圖1至圖2B、圖3A及圖3B、圖4A至圖5B所示般，使附倍力機構的壓缸裝置構成如下。　　使第1活塞5可於軸方向移動地***至殼體1。該第1活塞5，具有往軸方向形成的筒孔6。使第2活塞8可於軸方向移動地***至前述筒孔6。倍力機構20，具有：在前述第1活塞5與前述第2活塞8之間於圓周方向空出既定間隔來配置的複數個卡合構件（卡合球22）。使將前述第1活塞5往軸方向按壓的力藉由倍力機構20來倍力變換並傳達至前述第2活塞8。使輸出構件29可於軸方向移動地連結於前述第2活塞8。該輸出構件29是在軸方向空出既定間隔L而可與前述第2活塞8抵接地相面對。在前述第2活塞8與前述輸出構件29之間所安裝的彈推手段（壓縮彈簧41），是往使前述第2活塞8與前述輸出構件29分開的方向來作用力。　　[0006] 第1發明，發揮以下的作用效果。　　上述的倍力機構在倍力驅動開始之前，是使第2活塞透過彈推手段與輸出構件來抵接於按壓對象物。因此，相較於前述的以往技術般，在倍力機構的倍力驅動行程途中，使第2活塞透過輸出構件抵接於按壓對象物的情況，本發明的壓缸裝置，可緩和輸出構件對按壓對象物賦予的衝撃。　　[0007] 第1發明，以加上下述（1）及（4）的構造為佳。　　（1）從前述殼體1的前端壁1a往基端側突出設置有導引筒3。前述倍力機構20，具備：支撐筒21、卡合構件（卡合球22）、凸輪面24、按壓面27。支撐孔21是於圓周方向空出既定間隔來往半徑方向貫通前述導引筒3的筒壁3a。於前述支撐孔21***有前述卡合構件（卡合球22）。凸輪面24可卡合於前述卡合構件（卡合球22），該凸輪面24在前述第2活塞8的外周是形成為隨著朝向基端側而接近軸心。按壓面27可卡合於前述卡合構件（卡合球22），該按壓面27在前述第1活塞5的前述筒孔6是形成為隨著朝向基端側而接近軸心。　　此情況時，在上述倍力機構的倍力驅動時，往前端側按壓第1活塞的力，會透過按壓面與卡合構件與凸輪面來倍力變換並確實傳達至第2活塞。　　[0008] （2）藉由前述第1活塞5及前述第2活塞8使前述殼體1內於軸方向被區隔成鎖固室15與釋放室16。於前述鎖固室15及前述釋放室16供給排出有壓力流體。安裝於前述鎖固室15的固定彈簧19，是將前述第1活塞5往前端側彈推。　　此情況時，在上述倍力機構的倍力驅動時，相當於鎖固室之壓力流體之壓力的按壓力與固定彈簧的按壓力之合力，會透過第1活塞與倍力機構與第2活塞與輸出構件來將按壓對象物往前端側強力地按壓。　　[0009] （3）在前述第2活塞8的前端部朝向前端側來開口的安裝孔10a處，***有前述輸出構件29的基端部。於前述安裝孔10a安裝有前述彈推手段（壓縮彈簧41）。　　此情況時，彈推手段是相對於第2活塞確實地將輸出構件往前端側彈推。　　[0010] （4）前述第2活塞8形成為環狀。使前述輸出構件29可於軸方向移動地***至前述第2活塞8的筒孔51。前述輸出構件29的基端部是可被承接地與前述殼體1的基端壁1b相面對。　　此情況時，在壓缸裝置的釋放狀態下，輸出構件可確實地被殼體的基端壁給承接。　　[0011] 第2發明，例如圖3A及圖3B、圖4A至圖5B所示般，使附倍力機構的壓缸裝置構成如下。　　使第1活塞5可於軸方向移動地***至殼體1。該第1活塞5，具有往軸方向形成的筒孔6。使環狀的第2活塞8可於軸方向移動地***至前述筒孔6。使將前述第1活塞5往軸方向按壓的力藉由倍力機構20來倍力變換並傳達至前述第2活塞8。該倍力機構20，具有：在前述第1活塞5與前述第2活塞8之間於圓周方向空出既定間隔來配置的複數個卡合構件（卡合球22）。可往軸方向移動地***至前述第2活塞8之筒孔51的輸出構件29，是在軸方向空出既定間隔L而可與前述第2活塞8抵接地相面對。藉由設在前述殼體1的基端壁1b與前述輸出構件29之間的彈推手段56，使前述輸出構件29往前端側移動。　　[0012] 第2發明，發揮以下的作用效果。　　上述的倍力機構在倍力驅動開始之前，是使第2活塞透過彈推手段與輸出構件來抵接於按壓對象物。因此，相較於前述的以往技術般，在倍力機構的倍力驅動行程途中，使第2活塞透過輸出構件抵接於按壓對象物的情況，本發明的壓缸裝置，可緩和輸出構件對按壓對象物賦予的衝撃。　　[0013] 第2發明，以加上下述（5）至（7）的構造為佳。　　（5）前述輸出構件29的基端部是可被承接地與前述殼體1的基端壁1b相面對。　　此情況時，在壓缸裝置的釋放狀態下，輸出構件可確實地被殼體的基端壁給承接。　　[0014] （6）前述輸出構件29是構成為可透過前述第2活塞8來被前述殼體1的基端壁1b給承接。　　此情況時，在壓缸裝置的釋放狀態下，輸出構件可確實地透過前述第2活塞被殼體的基端壁給承接。　　[0015] （7）在前述第2活塞8與前述輸出構件29之間安裝有彈推手段（壓縮彈簧41），藉由前述彈推手段（壓縮彈簧41）來彈推使前述第2活塞8與前述輸出構件29分離。　　此情況時，藉由設在殼體的基端壁與輸出構件之間的彈推手段、以及安裝在第2活塞與輸出構件之間的彈推手段，來確實地將前述第2活塞與前述輸出構件往分離方向彈推。　　（8）藉由前述第1活塞（5）、前述第2活塞（8）、及前述輸出構件（29），使前述殼體（1）內在軸方向被區隔成鎖固室（15）與釋放室（16），於前述鎖固室（15）及前述釋放室（16）供給排出有壓力流體，前述輸出構件（29）的受壓面積（S1），是設定成比前述第2活塞（8）之環狀受壓部分的受壓面積（S2）還要寬廣。　　此情況時，以鎖固室的壓縮空氣將輸出構件往上方移動的推力，是變得比以鎖固室的壓縮空氣將第2活塞往上方按壓的力還要大。因此，輸出構件會比第2活塞還要先往上方被鎖固室的壓縮空氣給推動。[Problems to be Solved by the Invention] 0004 [0004] The above-mentioned conventional technologies still have room for improvement in the following viewpoints. When the above-mentioned output member is in contact with the workpiece, there is still room for improvement in that the abutment portion is impacted. An object of the present invention is to reduce the impact of an output member of a cylinder device with a double force mechanism on an object to be pressed. [Means for Solving the Problems] [0005] In order to achieve the above object, the first invention, for example, as shown in FIG. 1 to FIG. 2B, FIG. 3A and FIG. 3B, and FIG. 4A to FIG. The device configuration is as follows. The first piston 5 is inserted into the housing 1 so as to be movable in the axial direction. The first piston 5 has a cylindrical hole 6 formed in the axial direction. The second piston 8 is inserted into the cylindrical hole 6 so as to be movable in the axial direction. The force multiplier mechanism 20 includes a plurality of engagement members (engagement balls 22) arranged at predetermined intervals in the circumferential direction between the first piston 5 and the second piston 8. The force for pressing the first piston 5 in the axial direction is converted by the double force mechanism 20 and transmitted to the second piston 8. The output member 29 is connected to the second piston 8 so as to be movable in the axial direction. The output member 29 faces the second piston 8 while a predetermined interval L is left in the axial direction. An elastic pushing means (compression spring 41) installed between the second piston 8 and the output member 29 applies a force in a direction that separates the second piston 8 from the output member 29. [0006] The first invention has the following effects. Before the double-force driving starts, the above-mentioned double force mechanism causes the second piston to contact the object to be pressed through the pushing means and the output member. Therefore, compared with the conventional technique described above, when the second piston passes through the output member to abut the object to be pressed during the double-force driving stroke of the double-force mechanism, the cylinder device of the present invention can reduce the Press the impact given by the object. [0007] The first invention preferably has the following structures (1) and (4). (1) A guide cylinder 3 is provided protruding from the front end wall 1 a of the housing 1 toward the base end side. The force doubling mechanism 20 includes a support cylinder 21, an engagement member (an engagement ball 22), a cam surface 24, and a pressing surface 27. The support hole 21 is provided at a predetermined interval in the circumferential direction and penetrates the cylinder wall 3 a of the guide cylinder 3 in the radial direction. The engaging member (engaging ball 22) is inserted into the supporting hole 21. The cam surface 24 is engageable with the engagement member (engagement ball 22), and the cam surface 24 is formed on the outer periphery of the second piston 8 so as to approach the shaft center as it goes toward the proximal end side. The pressing surface 27 is engageable with the engaging member (engaging ball 22), and the pressing surface 27 is formed in the cylindrical hole 6 of the first piston 5 so as to approach the shaft center as it goes toward the proximal end side. In this case, during the double-force driving of the double-force mechanism, the force of pressing the first piston toward the front end side is converted through the pressing surface, the engaging member and the cam surface, and is surely transmitted to the second piston. [0008] (2) The first piston 5 and the second piston 8 are used to partition the inside of the housing 1 into the lock chamber 15 and the release chamber 16 in the axial direction. Pressurized fluid is supplied to the lock chamber 15 and the release chamber 16. The fixed spring 19 attached to the lock chamber 15 pushes the first piston 5 toward the front end side. In this case, during the double-force driving of the double-force mechanism, the combined force of the pressing force corresponding to the pressure of the pressure fluid in the lock chamber and the pressing force of the fixed spring passes through the first piston and the double-force mechanism and the second piston. With the output member, the pressing object is strongly pressed toward the front end side. [0009] (3) The base end portion of the output member 29 is inserted into the mounting hole 10a whose front end portion of the second piston 8 opens toward the front end side. The aforementioned elastic pushing means (compression spring 41) is mounted in the mounting hole 10a. In this case, the ejection means reliably ejects the output member toward the front end side with respect to the second piston. [0010] (4) The second piston 8 is formed in a ring shape. The output member 29 is inserted into the cylindrical hole 51 of the second piston 8 so as to be movable in the axial direction. The base end portion of the output member 29 can be grounded to face the base end wall 1 b of the casing 1. In this case, in the released state of the cylinder device, the output member can be reliably received by the base end wall of the housing. [0011] In the second invention, for example, as shown in FIGS. 3A and 3B and FIGS. 4A to 5B, the cylinder device with a force multiplier mechanism is configured as follows. The first piston 5 is inserted into the housing 1 so as to be movable in the axial direction. The first piston 5 has a cylindrical hole 6 formed in the axial direction. The annular second piston 8 is inserted into the cylindrical hole 6 so as to be movable in the axial direction. The force for pressing the first piston 5 in the axial direction is converted by the double force mechanism 20 and transmitted to the second piston 8. This force multiplying mechanism 20 includes a plurality of engagement members (engagement balls 22) arranged at predetermined intervals in the circumferential direction between the first piston 5 and the second piston 8. The output member 29 inserted into the bore 51 of the second piston 8 so as to be movable in the axial direction faces the second piston 8 in abutment with a predetermined interval L left in the axial direction. The output member 29 is moved toward the front end by a spring pushing means 56 provided between the base end wall 1b of the case 1 and the output member 29. [0012] The second invention exhibits the following effects. Before the double-force driving starts, the above-mentioned double force mechanism causes the second piston to contact the object to be pressed through the pushing means and the output member. Therefore, compared with the conventional technique described above, when the second piston passes through the output member to abut the object to be pressed during the double-force driving stroke of the double-force mechanism, the cylinder device of the present invention can reduce the Press the impact given by the object. [0013] The second invention preferably has the following structures (5) to (7). (5) The base end portion of the output member 29 can be grounded to face the base end wall 1 b of the housing 1. In this case, in the released state of the cylinder device, the output member can be reliably received by the base end wall of the housing. [0014] (6) The output member 29 is configured to be received by the base end wall 1b of the housing 1 through the second piston 8. In this case, in the released state of the cylinder device, the output member can be reliably received by the base end wall of the casing through the second piston. (7) A spring pushing means (compression spring 41) is installed between the second piston 8 and the output member 29, and the second piston 8 is pushed by the spring pushing means (compression spring 41). Separate from the aforementioned output member 29. In this case, the second piston and the above-mentioned piston are reliably secured by a spring-and-push mechanism provided between the base end wall of the housing and the output member, and a spring-and-push mechanism installed between the second piston and the output member The output member is pushed in the separating direction. (8) The first piston (5), the second piston (8), and the output member (29) separate the lock chamber (15) and the lock chamber (15) in the axial direction from the inside of the casing (1). The release chamber (16) supplies pressure fluid to the lock chamber (15) and the release chamber (16), and a pressure-receiving area (S1) of the output member (29) is set to be higher than that of the second piston ( 8) The pressure-receiving area (S2) of the ring-shaped pressure-receiving part should be wider. In this case, the pushing force of moving the output member upward with the compressed air of the lock chamber becomes larger than the force of pressing the second piston upward with the compressed air of the lock chamber. Therefore, the output member is pushed upward by the compressed air of the lock chamber before the second piston.

[0017] 圖1至圖2B，表示本發明的第1實施形態。該第1實施形態，示例出將工件（按壓對象物）W從下方往上推起之附倍力機構的壓缸裝置。首先，藉由圖1，說明附倍力機構的壓缸裝置的構造。　　[0018] 上述附倍力機構的壓缸裝置的殼體1，是藉由複數個螺栓（未圖示），而被固定在作為固定台的桌台T。該殼體1具有：上端壁（前端壁）1a、下端壁（基端壁）1b、胴部1c。　　[0019] 在上述殼體1內使缸體孔2於上下方向（軸方向）形成。在該缸體孔2內使導引筒3從上端壁1a往下方突出設置。使倍力用的第1活塞5可於上下方向移動地以密封狀***至缸體孔2。筒孔6於上下方向貫通於第1活塞5，使第2活塞8可於上下方向移動地以密封狀態***至該筒孔6。　　[0020] 上述的第2活塞8，具有：***至第1活塞5之筒孔6的活塞本體9、以及從該活塞本體9往上方一體地突出設置的活塞桿10。在該活塞桿10的外周部所設置的導引面11，是***至導引筒3的筒孔12內。從活塞桿10的外周部使銷13往半徑方向的外側突出設置。該銷13，是***至在導引筒3的筒壁3a往上下方向形成的導引槽14。藉此，使第2活塞8相對於殼體1的導引筒3被往上下方向導引，並且防止旋轉。　　[0021] 藉由上述的第1活塞5及第2活塞8使殼體1的內部空間被區隔成2個室。於第1活塞5及第2活塞8的下側形成有鎖固室15，並於第1活塞5及第2活塞8的上側形成有釋放室16。於鎖固室15進行壓縮空氣（壓力流體）的供給及排出的供給排出路17，是形成在殼體1的上端壁1a及胴部1c，於釋放室16進行壓縮空氣（壓力流體）的供給及排出之其他的供給排出路18是形成在殼體1的上端壁1a。且，於鎖固室15安裝有固定彈簧19，該固定彈簧19是將第1活塞5往上方彈推。　　[0022] 在上述釋放室16內配置有倍力機構20。該倍力機構20，是構成為將以鎖固室15的壓縮空氣使第1活塞5往上方（釋放室16側）按壓的力予以倍力變換並傳達至第2活塞8。　　[0023] 上述倍力機構20，是構成如下。　　支撐孔21是於圓周方向空出既定間隔來往半徑方向貫通上述導引筒3之筒壁3a的下部。卡合球（卡合構件）22是可於半徑方向移動地***至支撐孔21。與上述卡合球22對應地在活塞桿10的外周部形成有凸輪槽23。於該凸輪槽23的底壁所形成的凸輪面24，是形成為隨著朝向下方而接近軸心（直徑變小）。使卡合球22可抵接於該凸輪面24。且，在第1活塞5之筒孔6的上半部分使按壓面27形成為隨著朝向下方而接近軸心。卡合球22可抵接於該按壓面27。　　[0024] 在上述按壓面27的上側使筒孔6的按壓部28形成為隨著朝向鎖固室15側而逐漸接近軸心。藉此，在倍力機構20的倍力驅動開始時，按壓部28會將卡合球22往半徑方向的內側推出。且，從壓缸裝置之鎖固驅動的開始時到倍力機構20之倍力驅動開始的前一刻為止的鎖固驅動步驟，按壓部28會將卡合球22朝向活塞桿10的導引面11來往半徑方向的內側按壓。又，以按壓部28將卡合球22往半徑方向的內側按壓的力，是設定成比以按壓面27將卡合球22往半徑方向的內側按壓的力還要小。　　[0025] 使輸出構件29可於上下方向移動地連結於上述活塞桿10。在此，本實施形態中，輸出構件29是藉由夾桿30所構成。於該活塞桿10的上面使安裝孔10a朝向上方開口，使夾桿30的短徑部30a可於上下方向移動地***至該安裝孔10a。於夾桿30之短徑部30a的上側形成有長徑部30b。使該長徑部30b以密封狀態***至導引筒3的筒孔12。於活塞桿10的上面形成有卡合部33。在夾桿30之長徑部30b的下端面形成有可與該卡合部33抵接的卡止部34。從活塞桿10之安裝孔10a的周壁，使銷37往半徑方向的內側突出設置。該銷37，是***至在夾桿30的短徑部30a往上下方向形成的38。且，在夾桿30的上端面所形成的按壓部40，可抵接於工件（按壓對象物）W的下面。　　[0026] 在上述活塞桿10的安裝孔10a內安裝有壓縮彈簧（彈推手段）41。該壓縮彈簧41是相對於活塞桿10來將夾桿30往上方彈推，使夾桿30之長孔38的下端面被活塞桿10的銷37給承接。藉此，使活塞桿10的卡合部33與夾桿30的卡止部34成為空出既定間隔L且可抵接地相面對。　　[0027] 上述第1實施形態所示的壓缸裝置，是如圖1至圖2B所示般，進行以下動作。　　在圖1的釋放狀態中，是從鎖固室15排出壓縮空氣，並對釋放室16供給壓縮空氣。藉此，釋放室16的壓縮空氣會讓第1活塞5及第2活塞8下降到下限位置。　　在上述釋放狀態中將工件W搬入至夾桿30的上方，使該工件W被載置在從桌台T往上方突出設置的支撐銷42上。　　[0028] 在將上述壓缸裝置從圖1的釋放狀態往圖2B的鎖固狀態進行鎖固驅動時，是從釋放室16排出壓縮空氣，並對鎖固室15供給壓縮空氣。如此一來，鎖固室15的壓縮空氣會使第2活塞8往上方移動。在該狀態中，活塞桿10的導引面11會阻止卡合球22往半徑方向之內側的移動，第1活塞5的按壓部28會透過卡合球22而被導引筒3之支撐孔21的上壁給承接（亦即，使第1活塞5透過卡合球22連結於導引筒3），故阻止第1活塞5的上升。且，如圖2A所示般，第2活塞8，會留下第1活塞5以低負載來上升既定行程。如此一來，第2活塞8會透過壓縮彈簧41來使夾桿30上升。藉此，夾桿30的按壓部40會抵接於工件W的下面。其結果，夾桿30雖被工件W給承接，但第2活塞8會抵抗壓縮彈簧41的彈推力而逐漸上升。　　[0029] 接著，第2活塞8往上方移動，使得第2活塞8的凸輪面24上升到卡合球22的高度位置。如此一來，會容許卡合球22往半徑方向之內側的移動。接著，相當於鎖固室15之壓縮空氣之壓力的按壓力及固定彈簧19的彈推力之合力，會透過第1活塞5的按壓部28使卡合球22往半徑方向的內側移動，來使卡合球22按壓凸輪面24。藉此，第1活塞5與導引筒3（殼體1）之間的連結被解除，並且使第1活塞5透過卡合球22與第2活塞8連結。接著，第1活塞5，是透過按壓面27與卡合球22與凸輪面24來使第2活塞8抵抗前述壓縮彈簧41的彈推力來往上方移動。如此一來，如圖2B所示般，活塞桿10的卡合部33會抵接於夾桿30的卡止部34。藉此，第2活塞8會透過夾桿30來從下方按壓並支撐工件W。其結果，使壓缸裝置從釋放狀態切換至鎖固狀態。　　[0030] 在上述鎖固狀態中，即使因某種原因使得鎖固室15的壓力降低或是消失時，亦可使固定彈簧19之往上方的彈推力透過倍力機構20（按壓面27、卡合球22、凸輪面24）的卡榫作用來機械性地保持鎖固狀態，故可確實地維持該鎖固狀態。　　[0031] 在將上述壓缸裝置從圖2B的鎖固狀態切換至圖1的釋放狀態時，是在該圖2B的鎖固狀態，從鎖固室15排出壓縮空氣，並對釋放室16供給壓縮空氣，從而以釋放室16的壓縮空氣來使第1活塞5逐漸下降。如此一來，會容許卡合球22往半徑方向之外側的移動。接著，以釋放室16的壓縮空氣使第2活塞8下降，並以該第2活塞8的凸輪面24將卡合球22往半徑方向的外側推動。如此一來，第1活塞5會藉由下端壁1b被從下方承接，幾乎與此同時地，上述活塞桿10的導引面11會阻止卡合球22往半徑方向之內側的移動。於是，使第1活塞5與第2活塞8之間的連結狀態被解除，並且使上述第1活塞5透過卡合球22來被導引筒3之支撐孔21的周壁給承接，而阻止該第1活塞5的上升。之後，相對於上下方向的移動被阻止的第1活塞5，使第2活塞8進一步下降。如此一來，活塞桿10的銷37會抵接於夾桿30之長孔38的下端壁，從而以第2活塞8使夾桿30往下方移動。接著，該第2活塞8的下端面會被殼體1的下端壁1b給承接。藉此，使壓缸裝置從鎖固狀態切換成釋放狀態。　　[0032] 第1實施形態是發揮以下的優點。　　上述第1實施形態中，在倍力機構20的倍力驅動開始之前，第2活塞8是透過壓縮彈簧41與夾桿30來抵接於工件W。因此，相較於前述的以往技術般，在倍力機構的倍力驅動行程途中，使夾桿抵接於工件的情況，本實施形態的壓缸裝置，可緩和夾桿30對工件W賦予的衝撃。　　[0033] 圖3A及圖3B或圖4A至圖5B，表示本發明的第2實施形態或第3實施形態，對於與上述第1實施形態的構成構件相同的構件（或類似的構件），原則上附上相同的參考符號來進行說明。舉例表示適用該第2實施形態之附倍力機構的壓缸裝置之連桿式夾緊裝置。　　[0034] 圖3A及圖3B所示的第2實施形態與上述第1實施形態不同的點如下。　　在前述夾桿30的上端部於水平方向形成有插通孔，並在夾臂44的左端部於水平方向形成有插通孔。對該夾桿30的插通孔與夾臂44的插通孔***有連結銷。藉此，使夾臂44的左端部可在垂直面內擺動地連結於夾桿30的上端部。且，在夾桿30的右側於殼體1的上端壁1a使樞軸部45往上方突出設置。使連桿構件46的下端部可擺動地連結於該樞軸部45。使連桿構件46的上端部可擺動地連結於該夾臂44之長度方向的途中部。於夾臂44的右端部安裝有按壓件48。於該按壓件48的下端部形成有按壓部48a，使該按壓部48a可抵接於工件W。　　又，本實施形態中，是藉由夾桿30與夾臂44來構成輸出構件29。　　[0035] 如圖3A所示般，第2活塞8形成為環狀，使夾桿30可於上下方向移動地以密封狀態***至該第2活塞8的筒孔51。該夾桿30的下端面可抵接於殼體1的下端壁1b。藉此，在釋放狀態中，釋放室16的壓縮空氣會透過第2活塞8來將夾桿30的下桿53往下限位置推動，使該下桿53的下端面被殼體1的下端壁1b給承接。其結果，在釋放狀態下，夾桿30，其上下方向的移動被阻止，而確實維持釋放狀態。　　[0036] 第2實施形態是發揮以下的優點。　　上述第2實施形態中，在倍力機構20的倍力驅動開始之前，第2活塞8是透過壓縮彈簧41與輸出構件29（夾桿30與夾臂44）來抵接於工件W。因此，相較於前述的以往技術般，在倍力機構的倍力驅動行程途中，使夾桿抵接於工件的情況，本實施形態的壓缸裝置，可緩和輸出構件29對工件W賦予的衝撃。　　[0037] 圖4A至圖5B，表示本發明的第3實施形態，該第3實施形態與上述第1實施形態及第2實施形態不同的點如下。　　本實施形態的壓缸裝置，如圖4A所示般，是使筒狀的第2活塞8可於上下方向移動地以密封狀態***至第1活塞5的筒孔6。於第2活塞8貫通有上下方向的筒孔51。使輸出構件29的夾桿30可於上下方向移動地以密封狀態***至該筒孔51。第2活塞8的下端面可抵接於殼體1的下端壁1b。且，在構成前述筒孔51之一部分的安裝孔10a，安裝有壓縮彈簧（彈推手段）41。　　[0038] 上述夾桿30是***至導引筒3的筒孔12內。在該筒孔12的內周壁所形成的凹部，使球54往半徑方向的內側突出設置地來安裝。該球54，是***至在活塞桿10的外周壁往上下方向形成的導引槽55。藉此，使第2活塞8可相對於殼體1的導引筒3往上下方向移動且防止旋轉。　　[0039] 藉由上述第1活塞5與第2活塞8與夾桿30使缸體孔2被區隔成上下2個室。於第1活塞5與第2活塞8與夾桿30的下側形成有鎖固室15，並於第1活塞5與第2活塞8與夾桿30的上側形成有釋放室16。　　[0040] 上述夾桿30，具有：***至導引筒3之筒孔12的桿本體52、以及比桿本體52還要長徑地形成在該桿本體52之下側的下桿53。上述鎖固室15或釋放室16之壓縮空氣的壓力是作用於下桿53，該下桿53之受壓部分的受壓面積S1，是被設定成比第2活塞8之環狀受壓部分的受壓面積S2還要寬廣。因此，以鎖固室15的壓縮空氣將夾桿30往上方移動的推力，是變得比以鎖固室15的壓縮空氣將第2活塞8往上方按壓的力還要大。因此，夾桿30會比第2活塞8還要先往上方（下方）被鎖固室15（或釋放室16）的壓縮空氣給推動。本實施形態中，相對於第2活塞8使夾桿30往上方移動的彈推手段56，是藉由鎖固室15與供給至該鎖固室15的壓縮空氣來構成。　　在此，彈推手段56，亦可取代由鎖固室15等所構成者，而採用安裝在夾桿30的下端面與殼體1的下端壁1b之間的壓縮彈簧。　　[0041] 且，上述第3實施形態的壓缸裝置中，亦可省略上述的壓縮彈簧41。此情況時，是對作為彈推手段56的鎖固室15供給壓縮空氣，藉此使相當於該壓縮空氣之壓力的推力作用於該夾桿30，使得夾桿30比第2活塞8還要先往上方移動。　　[0042] 上述第3實施形態所示的壓缸裝置，是如圖4A至圖5B所示般，進行以下動作。　　在圖4A的釋放狀態中，是從鎖固室15排出壓縮空氣，並對釋放室16供給壓縮空氣。藉此，釋放室16的壓縮空氣會讓第1活塞5與第2活塞8與夾桿30移動到下限位置。　　在上述釋放狀態中從夾桿30的上方藉由搬送機構（未圖示）將工件W搬入，並將該工件W載置在桌台T上。　　[0043] 在將上述壓缸裝置從圖4A的釋放狀態往圖5B的鎖固狀態進行鎖固驅動時，是從釋放室16排出壓縮空氣，並對鎖固室15供給壓縮空氣。如此一來，鎖固室15的壓縮空氣會將夾桿30與第1活塞5與第2活塞8往上方按壓。在該狀態中，活塞桿10的導引面11會阻止卡合球22往半徑方向之內側的移動，第1活塞5的按壓部28會透過卡合球22而被導引筒3之支撐孔21的上壁給承接（亦即，使第1活塞5透過卡合球22連結於導引筒3），故阻止第1活塞5的上升。且，第1活塞5是透過卡合球22來按壓活塞桿10的導引面11，故第2活塞8，會抵抗卡合球22與導引面11之間產生的摩擦力來逐漸上升。如此一來，藉由相當於鎖固室15之壓縮空氣之壓力的按壓力與壓縮彈簧41的彈推力，使夾桿30比第2活塞8還要先往上方移動。接著，如圖5A所示般，使夾桿30之下桿53的上面53a抵接於筒孔51之長徑孔的頂壁51a的話，夾桿30與第2活塞8會成為一體來往上方移動。如此一來，夾臂44的按壓部44a會抵接於工件W的上面。接著，第2活塞8會抵抗壓縮彈簧41的彈推力而逐漸上升。　　[0044] 接著，當第2活塞8的凸輪面24上升至對面卡合球22的高度位置為止時，會容許卡合球22往半徑方向之內側的移動。然後，相當於鎖固室15之壓縮空氣之壓力的按壓力及固定彈簧19的彈推力之合力，會使第1活塞5上升，且該第1活塞5會透過按壓部28來使卡合球22往半徑方向的內側移動，進一步，使卡合球22按壓凸輪面24。藉此，第1活塞5透過卡合球22連結於導引筒3（殼體1）的狀態被解除，並且使第1活塞5透過卡合球22來連結於第2活塞8。藉此，第1活塞5會透過卡合球22來使第2活塞8往上方移動。如此一來，如圖5B所示般，活塞桿10的卡合部33會抵接於夾桿30的卡止部34。藉此，第2活塞8會透過倍力機構20與夾桿30與夾臂44來從上方按壓工件W。其結果，使壓缸裝置從釋放狀態切換至鎖固狀態。　　[0045] 在上述鎖固狀態中，即使因某種原因使得鎖固室15的壓力降低或是消失時，亦可使固定彈簧19之往上方的彈推力透過倍力機構20（按壓面27、卡合球22、凸輪面24）的卡榫作用來機械性地保持鎖固狀態，故可確實地維持該鎖固狀態。　　[0046] 在將上述壓缸裝置從圖5B的鎖固狀態切換至圖4A的釋放狀態時，是在該圖5B的鎖固狀態，從鎖固室15排出壓縮空氣，並對釋放室16供給壓縮空氣，從而以釋放室16的壓縮空氣來抵抗固定彈簧19之往上方的彈推力使第1活塞5下降。如此一來，會容許卡合球22往半徑方向之外側的移動。接著，以釋放室16的壓縮空氣使第2活塞8下降，並以該第2活塞8的凸輪面24將卡合球22往半徑方向的外側推動。此時，壓縮彈簧41是相對於第2活塞8將夾桿30往上方彈推，故夾桿30會留在上限位置。接著，使筒孔51之長徑孔的頂壁51a抵接於夾桿30之下桿53的上面53a的話，第2活塞8與夾桿30會成為一體來往下方移動。接著，第1活塞5會從下方從被下端壁1b給承接，幾乎與此同時地，上述活塞桿10的導引面11會將卡合球22往半徑方向的外側推出。於是，使第1活塞5與第2活塞8之間的連結狀態被解除，並且使上述第1活塞5透過卡合球22來被導引筒3之支撐孔21的周壁給承接。藉此，使該第1活塞5的上升被阻止。之後，若第2活塞8與夾桿30進一步下降的話，第2活塞8的下端面會從下方被殼體1的下端壁1b給承接。此外，夾桿30會將壓縮彈簧41按壓縮短有距離L，而使夾桿30的卡合部33從下方被活塞桿10的卡止部34給承接。藉此，使壓缸裝置從鎖固狀態切換成釋放狀態。　　[0047] 不過，上述第1、2實施形態的壓缸裝置中，在使夾桿30往下限位置移動後的釋放狀態中，第2活塞8與夾桿30是藉由壓縮彈簧41來分離既定距離L。　　相對於此，上述第3實施形態的壓缸裝置中，在釋放狀態下，夾桿30是將壓縮彈簧41按壓縮短有距離L，來抵接於第2活塞8。因此，釋放狀態之壓缸裝置的高度尺寸，在與第1、2實施形態之壓缸裝置的高度尺寸相比之下，可至少縮短有距離L。　　[0048] 上述各實施形態，可進行如下變更。　　上述壓缸裝置的設置姿勢，亦可與示例過的姿勢成為上下顛倒的姿勢，或是以橫向的姿勢、或是以斜向的姿勢來設置亦可。　　上述第2活塞8，並不限定於藉由活塞本體9與活塞桿10來構成，亦可省略活塞桿。此情況時，凸輪槽23及凸輪面是形成在活塞本體9的外周面，且安裝孔10a是形成在活塞本體9的上端部。　　上述卡合球22的設置數量，以3個或4個為佳，但亦可上午 11:15 2018/5/3 為2個或5個以上。　　上述卡合球22所***的支撐孔21，亦可在導引筒3的筒壁3a，將往水平方向貫通取代成往傾斜方向貫通。　　上述卡合構件，並不限定於示例的卡合球22，例如，亦可為圓柱形的輥子等之其他形狀的構件。　　本發明的壓缸裝置所使用的壓力流體，亦可取代示例的壓縮空氣，改成其他的壓縮氣體或液壓油等的液體。　　上述的彈推手段，亦可取代示例的壓縮彈簧41，改成橡膠或樹脂等之彈性構件，或是氣彈簧亦可。　　其他，在本業業者所想得到的範圍內當然能進行各種變更。1 to 2B show a first embodiment of the present invention. This first embodiment exemplifies a cylinder device with a double force mechanism that pushes a workpiece (pressing object) W upward from below. First, the structure of a cylinder device with a double force mechanism will be described with reference to FIG. 1. [0018] The casing 1 of the cylinder device with the double force mechanism is fixed to the table T as a fixed table by a plurality of bolts (not shown). The housing 1 includes an upper end wall (front end wall) 1a, a lower end wall (base end wall) 1b, and a crotch portion 1c. [0019] The cylinder hole 2 is formed in the housing 1 in the vertical direction (axial direction). A guide cylinder 3 is protruded downward from the upper end wall 1a in the cylinder hole 2. The first piston 5 for double force is inserted into the cylinder hole 2 in a sealed manner so as to be movable in the vertical direction. The cylindrical hole 6 penetrates the first piston 5 in the vertical direction, and the second piston 8 is inserted into the cylindrical hole 6 in a sealed state so as to be movable in the vertical direction. [0020] The second piston 8 described above includes a piston body 9 inserted into the bore 6 of the first piston 5, and a piston rod 10 integrally protruding upward from the piston body 9. A guide surface 11 provided on an outer peripheral portion of the piston rod 10 is inserted into a cylinder hole 12 of the guide cylinder 3. A pin 13 is provided from the outer peripheral portion of the piston rod 10 to project radially outward. The pin 13 is inserted into a guide groove 14 formed in the cylinder wall 3 a of the guide cylinder 3 in the vertical direction. Thereby, the second piston 8 is guided in the up-down direction with respect to the guide cylinder 3 of the housing 1 and prevented from rotating. [0021] The internal space of the housing 1 is divided into two chambers by the first piston 5 and the second piston 8 described above. A lock chamber 15 is formed below the first piston 5 and the second piston 8, and a release chamber 16 is formed above the first piston 5 and the second piston 8. A supply and discharge path 17 for supplying and discharging compressed air (pressurized fluid) in the lock chamber 15 is formed in the upper end wall 1a and the crotch 1c of the housing 1, and supplies compressed air (pressurized fluid) in the release chamber 16. The other supply and discharge paths 18 and the discharge are formed in the upper end wall 1 a of the case 1. A fixed spring 19 is attached to the lock chamber 15. The fixed spring 19 pushes the first piston 5 upward. [0022] A force doubling mechanism 20 is disposed in the release chamber 16. This force multiplying mechanism 20 is configured to convert the force that presses the first piston 5 upward (on the release chamber 16 side) with the compressed air of the lock chamber 15 and transmits the force to the second piston 8. [0023] The force-doubling mechanism 20 is configured as follows. The cymbal support hole 21 penetrates the lower part of the cylinder wall 3a of the guide cylinder 3 in a radial direction at a predetermined interval and passes in a radial direction. The engagement ball (engagement member) 22 is inserted into the support hole 21 so as to be movable in the radial direction. A cam groove 23 is formed in the outer peripheral portion of the piston rod 10 corresponding to the engagement ball 22. The cam surface 24 formed on the bottom wall of the cam groove 23 is formed so as to approach the shaft center (the diameter becomes smaller) as it goes downward. The engaging ball 22 can be brought into contact with the cam surface 24. In addition, in the upper half of the bore 6 of the first piston 5, the pressing surface 27 is formed so as to approach the axial center as it goes downward. The engaging ball 22 can abut against the pressing surface 27. [0024] The pressing portion 28 of the cylindrical hole 6 is formed on the upper side of the pressing surface 27 so as to gradually approach the axial center as it goes toward the lock chamber 15 side. Accordingly, when the double-force driving of the double-force mechanism 20 is started, the pressing portion 28 pushes the engaging ball 22 toward the inside in the radial direction. In addition, from the start of the lock driving of the cylinder device to the moment immediately before the start of the double driving of the double driving mechanism 20, the pressing portion 28 will direct the engaging ball 22 toward the guide surface of the piston rod 10. 11 Press inward in the radial direction. In addition, the force with which the engaging ball 22 is pressed inward in the radial direction by the pressing portion 28 is set to be smaller than the force with which the engaging ball 22 is pressed inward in the radial direction by the pressing surface 27. [0025] The output member 29 is connected to the piston rod 10 so as to be movable in the vertical direction. Here, in this embodiment, the output member 29 is constituted by the clamp lever 30. The mounting hole 10a is opened upward on the upper surface of the piston rod 10, and the short diameter portion 30a of the clamp rod 30 is inserted into the mounting hole 10a so as to be movable in the vertical direction. A long diameter portion 30 b is formed on the upper side of the short diameter portion 30 a of the clamp lever 30. The long-diameter portion 30b is inserted into the cylindrical hole 12 of the guide cylinder 3 in a sealed state. An engaging portion 33 is formed on the upper surface of the piston rod 10. A locking portion 34 is formed on a lower end surface of the long-diameter portion 30 b of the clamp lever 30 so as to be in contact with the engaging portion 33. From the peripheral wall of the mounting hole 10a of the piston rod 10, a pin 37 is provided to protrude inward in the radial direction. This pin 37 is inserted into 38 formed in the short-diameter portion 30 a of the clamp lever 30 in the vertical direction. In addition, the pressing portion 40 formed on the upper end surface of the clamp lever 30 can abut the lower surface of the workpiece (pressing object) W. [0026] A compression spring (spring pushing means) 41 is mounted in the mounting hole 10a of the piston rod 10. The compression spring 41 pushes the clamp rod 30 upward relative to the piston rod 10, so that the lower end surface of the long hole 38 of the clamp rod 30 is received by the pin 37 of the piston rod 10. As a result, the engaging portion 33 of the piston rod 10 and the engaging portion 34 of the clamp rod 30 are spaced apart from each other by a predetermined interval L and can face each other. [0027] The cylinder device shown in the first embodiment described above performs the following operations as shown in FIG. 1 to FIG. 2B. In the released state of FIG. 1, compressed air is discharged from the lock chamber 15 and compressed air is supplied to the release chamber 16. Accordingly, the compressed air in the release chamber 16 lowers the first piston 5 and the second piston 8 to the lower limit position. (2) In the above-mentioned released state, the workpiece W is brought into the upper side of the clamp bar 30, and the workpiece W is placed on the support pin 42 protruding upward from the table T. [0028] When the above-mentioned cylinder device is locked and driven from the released state in FIG. 1 to the locked state in FIG. 2B, compressed air is discharged from the release chamber 16 and compressed air is supplied to the lock chamber 15. In this way, the compressed air in the lock chamber 15 moves the second piston 8 upward. In this state, the guide surface 11 of the piston rod 10 prevents the engaging ball 22 from moving inward in the radial direction, and the pressing portion 28 of the first piston 5 passes through the engaging ball 22 to be supported by the guide tube 3 The upper wall of 21 is received (that is, the first piston 5 is connected to the guide cylinder 3 through the engaging ball 22), so that the first piston 5 is prevented from rising. In addition, as shown in FIG. 2A, the second piston 8 leaves the first piston 5 with a low load to raise the predetermined stroke. In this way, the second piston 8 raises the clamp lever 30 through the compression spring 41. As a result, the pressing portion 40 of the clamp lever 30 is in contact with the lower surface of the workpiece W. As a result, although the clamp rod 30 is received by the workpiece W, the second piston 8 gradually rises against the elastic force of the compression spring 41. [0029] Next, the second piston 8 moves upward so that the cam surface 24 of the second piston 8 rises to the height position of the engagement ball 22. This allows the engaging ball 22 to move inward in the radial direction. Next, the combined force of the pressing force corresponding to the pressure of the compressed air of the lock chamber 15 and the elastic pushing force of the fixed spring 19 moves the engaging ball 22 inward in the radial direction through the pressing portion 28 of the first piston 5 to make The engagement ball 22 presses the cam surface 24. Thereby, the connection between the first piston 5 and the guide cylinder 3 (the casing 1) is released, and the first piston 5 is connected to the second piston 8 through the engagement ball 22. Next, the first piston 5 moves the second piston 8 upward against the elastic thrust of the compression spring 41 through the pressing surface 27, the engagement ball 22, and the cam surface 24. In this way, as shown in FIG. 2B, the engaging portion 33 of the piston rod 10 abuts against the engaging portion 34 of the clamp rod 30. Accordingly, the second piston 8 presses and supports the work W from below through the clamp lever 30. As a result, the cylinder device is switched from the released state to the locked state. [0030] In the above-mentioned locked state, even if the pressure in the lock chamber 15 is reduced or disappeared for some reason, the upward elastic force of the fixed spring 19 can be transmitted through the double force mechanism 20 (pressing surface 27, The locking ball 22 and the cam surface 24) act to mechanically maintain the locked state, so that the locked state can be reliably maintained. [0031] When the above-mentioned cylinder device is switched from the locked state of FIG. 2B to the released state of FIG. 1, in the locked state of FIG. 2B, compressed air is discharged from the lock chamber 15 and supplied to the release chamber 16. With the compressed air, the first piston 5 is gradually lowered by the compressed air in the release chamber 16. This allows the engaging ball 22 to move outward in the radial direction. Next, the second piston 8 is lowered by the compressed air in the release chamber 16, and the cam ball 24 of the second piston 8 is used to push the engaging ball 22 outward in the radial direction. In this way, the first piston 5 is received from below by the lower end wall 1b, and at the same time, the guide surface 11 of the piston rod 10 prevents the engagement ball 22 from moving inward in the radial direction. Then, the connection state between the first piston 5 and the second piston 8 is released, and the first piston 5 is received by the peripheral wall of the support hole 21 of the guide cylinder 3 through the engaging ball 22, thereby preventing the The first piston 5 rises. Thereafter, the second piston 8 is further lowered with respect to the first piston 5 whose movement in the vertical direction is prevented. In this way, the pin 37 of the piston rod 10 will abut the lower end wall of the long hole 38 of the clamp rod 30, so that the clamp rod 30 is moved downward by the second piston 8. Next, the lower end surface of the second piston 8 is received by the lower end wall 1 b of the housing 1. Thereby, the cylinder device is switched from the locked state to the released state. [0032] The first embodiment has the following advantages.中 In the first embodiment described above, before the double-force driving of the double-force mechanism 20 is started, the second piston 8 comes into contact with the work W through the compression spring 41 and the clamp lever 30. Therefore, compared with the conventional technology described above, when the clamping rod is abutted against the workpiece during the double-force driving stroke of the double-force mechanism, the cylinder device of this embodiment can alleviate the impact of the clamping rod 30 on the workpiece W Rush. [0033] FIGS. 3A and 3B or FIGS. 4A to 5B show a second embodiment or a third embodiment of the present invention. For the same components (or similar components) as those of the first embodiment, the principle The same reference symbols are used for explanation. An example is a link type clamping device of a cylinder device to which the double force mechanism of the second embodiment is applied. [0034] The second embodiment shown in FIGS. 3A and 3B is different from the first embodiment in the following points.插 An insertion hole is formed at the upper end portion of the clamp lever 30 in the horizontal direction, and an insertion hole is formed at the left end portion of the clamp arm 44 in the horizontal direction. A connection pin is inserted into the insertion hole of the clamp lever 30 and the insertion hole of the clamp arm 44. Thereby, the left end portion of the clamp arm 44 is swingably connected to the upper end portion of the clamp lever 30 in a vertical plane. In addition, a pivot portion 45 is protruded upward from the upper end wall 1 a of the housing 1 on the right side of the clamp lever 30. The lower end portion of the link member 46 is swingably connected to the pivot portion 45. An upper end portion of the link member 46 is swingably connected to a midway portion in the longitudinal direction of the clamp arm 44. A pressing member 48 is attached to the right end portion of the clamp arm 44. A pressing portion 48 a is formed at a lower end portion of the pressing member 48 so that the pressing portion 48 a can abut the workpiece W. In addition, in this embodiment, the output member 29 is constituted by the clamp lever 30 and the clamp arm 44. [0035] As shown in FIG. 3A, the second piston 8 is formed in a ring shape, and the clamp rod 30 is inserted into the cylindrical hole 51 of the second piston 8 in a sealed state so as to be movable in the vertical direction. The lower end surface of the clamp lever 30 can abut against the lower end wall 1 b of the housing 1. As a result, in the released state, the compressed air of the release chamber 16 will push the lower rod 53 of the clamp lever 30 to the lower limit position through the second piston 8 so that the lower end surface of the lower rod 53 is the lower end wall 1 b of the housing 1. To undertake. As a result, in the released state, the vertical movement of the clamp lever 30 is prevented, and the released state is surely maintained. [0036] The second embodiment has the following advantages. In the second embodiment described above, before the double-force driving of the double-force mechanism 20 is started, the second piston 8 abuts against the workpiece W through the compression spring 41 and the output member 29 (the clamp lever 30 and the clamp arm 44). Therefore, compared with the conventional technology described above, when the clamping rod is abutted against the workpiece during the double-force driving stroke of the double-force mechanism, the cylinder device of this embodiment can alleviate the effect of the output member 29 on the workpiece W. Rush. [0037] FIGS. 4A to 5B show a third embodiment of the present invention. The third embodiment differs from the first and second embodiments described above in the following points.压 As shown in FIG. 4A, the cylinder device of this embodiment is inserted into the cylindrical hole 6 of the first piston 5 in a sealed state so that the cylindrical second piston 8 can be moved in the vertical direction. A vertical cylindrical hole 51 is penetrated through the second piston 8. The clamp lever 30 of the output member 29 is inserted into the cylindrical hole 51 in a sealed state so as to be movable in the vertical direction. The lower end surface of the second piston 8 may be in contact with the lower end wall 1 b of the housing 1. In addition, a compression spring (spring pushing means) 41 is attached to the mounting hole 10 a constituting a part of the cylindrical hole 51. [0038] The clamp lever 30 is inserted into the cylinder hole 12 of the guide cylinder 3. The concave portion formed on the inner peripheral wall of the cylindrical hole 12 is attached with the ball 54 protruding inward in the radial direction. The ball 54 is inserted into a guide groove 55 formed in the outer peripheral wall of the piston rod 10 in the vertical direction. This allows the second piston 8 to move up and down with respect to the guide tube 3 of the housing 1 and prevents rotation. [0039] The cylinder bore 2 is partitioned into two upper and lower chambers by the first piston 5 and the second piston 8 and the clamp rod 30. A lock chamber 15 is formed on the lower side of the first piston 5 and the second piston 8 and the clamp lever 30, and a release chamber 16 is formed on the upper side of the first piston 5 and the second piston 8 and the clamp lever 30. [0040] The clamp lever 30 includes a lever body 52 inserted into the barrel hole 12 of the guide tube 3, and a lower lever 53 formed on the lower side of the lever body 52 with a longer diameter than the lever body 52. The pressure of the compressed air in the lock chamber 15 or the release chamber 16 is applied to the lower rod 53. The pressure area S1 of the pressure portion of the lower rod 53 is set to be greater than the annular pressure portion of the second piston 8. The pressure area S2 should be wider. Therefore, the pushing force of moving the clamp lever 30 upward with the compressed air of the lock chamber 15 becomes larger than the force of pressing the second piston 8 upward with the compressed air of the lock chamber 15. Therefore, the clamp lever 30 is pushed upward (below) by the compressed air of the lock chamber 15 (or the release chamber 16) before the second piston 8. In the present embodiment, the spring pushing mechanism 56 that moves the clamp lever 30 upward relative to the second piston 8 is configured by the lock chamber 15 and compressed air supplied to the lock chamber 15.此 Here, instead of being constituted by the lock chamber 15 or the like, the spring pushing means 56 may be a compression spring installed between the lower end surface of the clamp lever 30 and the lower end wall 1 b of the housing 1. [0041] In the cylinder device according to the third embodiment, the compression spring 41 may be omitted. In this case, compressed air is supplied to the lock chamber 15 as the ejection means 56, so that a thrust force corresponding to the pressure of the compressed air is applied to the clamp lever 30, so that the clamp lever 30 is larger than the second piston 8. Move up first. [0042] The cylinder device shown in the third embodiment described above performs the following operations as shown in FIGS. 4A to 5B. In the released state of FIG. 4A, compressed air is discharged from the lock chamber 15 and compressed air is supplied to the release chamber 16. Thereby, the compressed air in the release chamber 16 moves the first piston 5 and the second piston 8 and the clamp lever 30 to the lower limit position. In the released state, the workpiece W is carried in from a position above the clamp lever 30 by a transport mechanism (not shown), and the workpiece W is placed on the table T. [0043] When the above-mentioned cylinder device is locked and driven from the released state in FIG. 4A to the locked state in FIG. 5B, compressed air is discharged from the release chamber 16 and compressed air is supplied to the lock chamber 15. In this way, the compressed air of the lock chamber 15 will press the clamp lever 30 and the first piston 5 and the second piston 8 upward. In this state, the guide surface 11 of the piston rod 10 prevents the engaging ball 22 from moving inward in the radial direction, and the pressing portion 28 of the first piston 5 passes through the engaging ball 22 to be supported by the guide tube 3 The upper wall of 21 is received (that is, the first piston 5 is connected to the guide cylinder 3 through the engaging ball 22), so that the first piston 5 is prevented from rising. In addition, the first piston 5 presses the guide surface 11 of the piston rod 10 through the engagement ball 22. Therefore, the second piston 8 gradually rises against the frictional force generated between the engagement ball 22 and the guide surface 11. In this way, the clamping lever 30 is moved upward further than the second piston 8 by the pressing force corresponding to the pressure of the compressed air of the lock chamber 15 and the elastic pushing force of the compression spring 41. Next, as shown in FIG. 5A, when the upper surface 53a of the lower rod 53 of the clamp rod 30 is brought into contact with the top wall 51a of the long-diameter hole of the cylindrical hole 51, the clamp rod 30 and the second piston 8 are integrated to move upward . In this way, the pressing portion 44 a of the clamp arm 44 abuts on the upper surface of the workpiece W. Then, the second piston 8 gradually rises against the elastic thrust of the compression spring 41. [0044] Next, when the cam surface 24 of the second piston 8 is raised to the height position of the opposite engaging ball 22, the engaging ball 22 is allowed to move inward in the radial direction. Then, the combined force of the pressing force corresponding to the pressure of the compressed air of the lock chamber 15 and the elastic pushing force of the fixed spring 19 causes the first piston 5 to rise, and the first piston 5 passes the pressing portion 28 to engage the ball 22 moves inward in the radial direction, and further, the engaging ball 22 presses the cam surface 24. Thereby, the state in which the first piston 5 is connected to the guide cylinder 3 (housing 1) through the engagement ball 22 is released, and the first piston 5 is connected to the second piston 8 through the engagement ball 22. Accordingly, the first piston 5 moves the second piston 8 upward through the engaging ball 22. In this way, as shown in FIG. 5B, the engaging portion 33 of the piston rod 10 abuts against the engaging portion 34 of the clamp rod 30. As a result, the second piston 8 presses the work W from above through the force multiplying mechanism 20, the clamp lever 30, and the clamp arm 44. As a result, the cylinder device is switched from the released state to the locked state. [0045] In the above-mentioned locked state, even if the pressure in the lock chamber 15 is reduced or disappeared for some reason, the upward elastic force of the fixed spring 19 can be transmitted through the double force mechanism 20 (pressing surface 27, The locking ball 22 and the cam surface 24) act to mechanically maintain the locked state, so that the locked state can be reliably maintained. [0046] When the above-mentioned cylinder device is switched from the locked state of FIG. 5B to the released state of FIG. 4A, compressed air is discharged from the lock chamber 15 and supplied to the release chamber 16 in the locked state of FIG. 5B. The compressed air releases the first piston 5 by using the compressed air of the release chamber 16 to resist the upward spring force of the fixed spring 19. This allows the engaging ball 22 to move outward in the radial direction. Next, the second piston 8 is lowered by the compressed air in the release chamber 16, and the cam ball 24 of the second piston 8 is used to push the engaging ball 22 outward in the radial direction. At this time, since the compression spring 41 pushes the clamp lever 30 upward with respect to the second piston 8, the clamp lever 30 remains at the upper limit position. Next, when the top wall 51a of the long-diameter hole of the cylindrical hole 51 is brought into contact with the upper surface 53a of the lower rod 53 of the clamp rod 30, the second piston 8 and the clamp rod 30 are integrated to move downward. Next, the first piston 5 is received from below by the lower end wall 1b, and at the same time, the guide surface 11 of the piston rod 10 pushes the engagement ball 22 outward in the radial direction. Then, the connection state between the first piston 5 and the second piston 8 is released, and the first piston 5 is received by the peripheral wall of the support hole 21 of the guide tube 3 through the engaging ball 22. This prevents the first piston 5 from rising. After that, if the second piston 8 and the clamp lever 30 are further lowered, the lower end surface of the second piston 8 will be received by the lower end wall 1 b of the housing 1 from below. In addition, the clamp lever 30 presses and shortens the compression spring 41 by a distance L, and the engaging portion 33 of the clamp lever 30 is received by the locking portion 34 of the piston rod 10 from below. Thereby, the cylinder device is switched from the locked state to the released state. [0047] However, in the cylinder device according to the first and second embodiments, the second piston 8 and the clamp lever 30 are separated from each other by a compression spring 41 in a released state after the clamp lever 30 is moved to the lower limit position. Distance L. In contrast, in the cylinder device according to the third embodiment described above, in the released state, the clamp lever 30 presses the compression spring 41 and shortens it by a distance L to abut the second piston 8. Therefore, the height dimension of the cylinder device in the released state can be shortened by at least the distance L compared with the height dimension of the cylinder device in the first and second embodiments. [0048] The above embodiments can be modified as follows. The installation posture of the above-mentioned cylinder device may be an upside down posture with the exemplified posture, or it may be installed in a horizontal posture or an oblique posture. The second piston 8 is not limited to the piston body 9 and the piston rod 10, and the piston rod may be omitted. In this case, the cam groove 23 and the cam surface are formed on the outer peripheral surface of the piston body 9, and the mounting hole 10 a is formed on the upper end portion of the piston body 9.数量 The number of the above-mentioned engagement balls 22 is preferably 3 or 4, but it is also possible 11:15 am 5/3/2018 It is 2 or more.的 The support hole 21 into which the engaging ball 22 is inserted may be penetrated in the horizontal direction of the guide wall 3 into the wall 3a of the guide tube 3 instead of penetrating in the inclined direction. The above-mentioned engaging member is not limited to the exemplary engaging ball 22, and may be, for example, a member having other shapes such as a cylindrical roller.的 The pressurized fluid used in the cylinder device of the present invention can also be replaced with other compressed gas or liquid such as hydraulic oil instead of the compressed air as shown in the example. The above-mentioned spring pushing method may also replace the exemplary compression spring 41, and may be replaced with an elastic member such as rubber or resin, or a gas spring. Others, of course, various changes can be made within the range desired by the industry.

[0049] [0049]

W‧‧‧工件（按壓對象物） W‧‧‧ Workpiece (pressing object)

1‧‧‧殼體 1‧‧‧shell

1a‧‧‧上端壁（前端壁） 1a‧‧‧upper wall (front wall)

1b‧‧‧下端壁（基端壁） 1b‧‧‧ lower end wall (basal end wall)

3‧‧‧導引筒 3‧‧‧Guide tube

3a‧‧‧筒壁 3a‧‧‧tube wall

5‧‧‧第1活塞 5‧‧‧The first piston

6‧‧‧筒孔 6‧‧‧ tube hole

8‧‧‧第2活塞 8‧‧‧ 2nd piston

10a‧‧‧安裝孔 10a‧‧‧Mounting hole

15‧‧‧鎖固室 15‧‧‧Locking Room

16‧‧‧釋放室 16‧‧‧Release room

19‧‧‧固定彈簧 19‧‧‧ fixed spring

20‧‧‧倍力機構 20‧‧‧Beili Agency

21‧‧‧支撐孔 21‧‧‧ support hole

22‧‧‧卡合球（卡合構件） 22‧‧‧ Engagement ball (engagement member)

24‧‧‧凸輪面 24‧‧‧ cam surface

27‧‧‧按壓面 27‧‧‧Pressing surface

29‧‧‧輸出構件 29‧‧‧ Output component

40‧‧‧按壓部（輸出部） 40‧‧‧Pressing section (output section)

41‧‧‧壓縮彈簧（彈推手段） 41‧‧‧Compression spring (spring push method)

[0016] 　　圖1為表示本發明的第1實施形態，表示附倍力機構的壓缸裝置的釋放狀態之立面觀看的剖面圖。　　圖2A及圖2B為上述壓缸裝置的作動說明圖，是與前述圖1類似的圖。　　圖3A及圖3B為表示本發明的第2實施形態。圖3A為與前述圖1類似的圖。圖3B為與前述圖2B類似的圖。　　圖4A為表示本發明的第3實施形態，是與前述圖1類似的圖，圖4B為沿著圖4A所示之面4B的剖面圖。　　圖5A及圖5B為上述壓缸裝置的作動說明圖，是與前述圖4類似的圖。[0016] FIG. 1 is a cross-sectional view showing a first embodiment of the present invention, showing a released state of a cylinder device with a double force mechanism when viewed from an elevation. 2A and 2B are explanatory diagrams of the operation of the above-mentioned cylinder device, and are similar to those of FIG. 1 described above. 3A and 3B show a second embodiment of the present invention. FIG. 3A is a diagram similar to the aforementioned FIG. 1. FIG. 3B is a diagram similar to the aforementioned FIG. 2B. FIG. 4A shows a third embodiment of the present invention, and is similar to FIG. 1 described above, and FIG. 4B is a cross-sectional view taken along a surface 4B shown in FIG. 4A. 5A and 5B are explanatory diagrams of the operation of the above-mentioned cylinder device, and are similar to the aforementioned FIG. 4.

Claims

一種附倍力機構的壓缸裝置，其具備：　　第1活塞（5），是可往軸方向移動地***至殼體（1），並且具有往軸方向形成的筒孔（6）；　　第2活塞（8），是可往軸方向移動地***至前述筒孔（6）；　　倍力機構（20），是在前述第1活塞（5）與前述第2活塞（8）之間具有往圓周方向空出既定間隔來配置的複數個卡合構件（22），該倍力機構（20）是將往軸方向按壓前述第1活塞（5）的力予以倍力變換來傳達至前述第2活塞（8）；　　輸出構件（29），可往軸方向移動地連結於前述第2活塞（8），並且在軸方向空出既定間隔（L）而可與前述第2活塞（8）抵接地相面對；以及　　彈推手段（41），是安裝在前述第2活塞（8）與前述輸出構件（29）之間，該彈推手段（41）是往使前述第2活塞（8）與前述輸出構件（29）分開的方向來作用力。A pressure cylinder device with a double force mechanism includes: a first piston (5), which is inserted into the housing (1) so as to be movable in the axial direction, and has a cylindrical hole (6) formed in the axial direction; The piston (8) is inserted into the barrel hole (6) so as to be movable in the axial direction; the double force mechanism (20) has a circumferential direction between the first piston (5) and the second piston (8). A plurality of engaging members (22) arranged at predetermined intervals in the direction are provided, and the force multiplier mechanism (20) converts the force that presses the first piston (5) in the axial direction to a multiplier to transmit the force to the second piston. (8); The output member (29) is movably connected to the second piston (8) in the axial direction, and a predetermined interval (L) is left in the axial direction so as to be in contact with the second piston (8). Facing; and the pushing means (41) is installed between the second piston (8) and the output member (29), and the pushing means (41) is to make the second piston (8) and the aforementioned The output member (29) acts in the direction of separation.

如請求項1所述之附倍力機構的壓缸裝置，其中，　　從前述殼體（1）的前端壁（1a）往基端側突出設置有導引筒（3），　　前述倍力機構（20），具備：　　支撐孔（21），是往圓周方向空出既定間隔來往半徑方向貫通前述導引筒（3）的筒壁（3a）；　　前述卡合構件（22），是***至前述支撐孔（21）；　　凸輪面（24），是可卡合於前述卡合構件（22），並且在前述第2活塞（8）的外周是形成為隨著朝向基端側而接近軸心；以及　　按壓面（27），是可卡合於前述卡合構件（22），並且在前述第1活塞（5）的前述筒孔（6）形成為隨著朝向基端側而接近軸心。The pressure cylinder device with a double force mechanism according to claim 1, wherein: 导引 a guide cylinder (3) is protruded from the front wall (1a) of the housing (1) toward the base end side, and the double force mechanism ( 20) with: the support hole (21) is a cylinder wall (3a) which penetrates the guide cylinder (3) with a predetermined interval in the circumferential direction and passes in the radial direction; the engagement member (22) is inserted into the support The hole (21); the cam surface (24) is engageable with the engagement member (22), and is formed on the outer periphery of the second piston (8) to approach the center of the shaft as it goes toward the base end side; and The pressing surface (27) is engageable with the engaging member (22), and the cylindrical hole (6) of the first piston (5) is formed so as to approach the shaft center as it goes toward the base end side.

如請求項1或2所述之附倍力機構的壓缸裝置，其中，　　藉由前述第1活塞（5）及前述第2活塞（8）使前述殼體（1）內於軸方向被區隔成鎖固室（15）與釋放室（16），在前述鎖固室（15）及前述釋放室（16）供給排出有壓力流體，　　安裝於前述鎖固室（15）的固定彈簧（19），是將前述第1活塞（5）往前端側彈推。The pressure cylinder device with a double force mechanism according to claim 1 or 2, wherein: (1) the first piston (5) and the second piston (8) are used to enclose the housing (1) in the axial direction. A lock chamber (15) and a release chamber (16) are partitioned, and a pressure fluid is supplied to the lock chamber (15) and the release chamber (16), and a fixed spring (19) installed in the lock chamber (15) is provided. ) Is to push the first piston (5) toward the front end side.

如請求項1所述之附倍力機構的壓缸裝置，其中，　　在前述第2活塞（8）的前端部朝向前端側來開口的安裝孔（10a）處，***有前述輸出構件（29）的基端部，　　於前述安裝孔（10a）安裝有前述彈推手段（41）。The cylinder device with a double force mechanism according to claim 1, wherein the output member (29) is inserted into the mounting hole (10a) where the front end portion of the second piston (8) opens toward the front end side. The base end portion is fitted in the mounting hole (10a) with the spring pushing means (41).

如請求項1所述之附倍力機構的壓缸裝置，其中，　　使前述輸出構件（29）可於軸方向移動地***至前述第2活塞（8）的筒孔（51），　　前述輸出構件（29）的基端部是可被承接地與前述殼體（1）的基端壁（1b）相面對。The pressure cylinder device with a double force mechanism according to claim 1, wherein: 输出 the output member (29) is inserted into the barrel hole (51) of the second piston (8) so as to be movable in the axial direction; the output member The base end portion of (29) can be grounded to face the base end wall (1b) of the aforementioned casing (1).

一種附倍力機構的壓缸裝置，其具備：　　第1活塞（5），是可往軸方向移動地***至殼體（1），並且具有往軸方向形成的筒孔（6）；　　環狀的第2活塞（8），可往軸方向移動地***至前述筒孔（6）；　　倍力機構（20），是在前述第1活塞（5）與前述第2活塞（8）之間具有往圓周方向空出既定間隔來配置的複數個卡合構件（22），該倍力機構（20）是將往軸方向按壓前述第1活塞（5）的力予以倍力變換來傳達至前述第2活塞（8）；　　輸出構件（29），可往軸方向移動地***至前述第2活塞（8）的筒孔（51），並且在軸方向空出既定間隔（L）而可與前述第2活塞（8）抵接地相面對；以及　　彈推手段（56），是設在前述殼體（1）的基端壁（1b）與前述輸出構件（29）之間，該彈推手段（56），是使前述輸出構件（29）相對於前述第2活塞（8）往前端側移動。A pressure cylinder device with a double force mechanism includes: 具备 a first piston (5), which is inserted into the housing (1) so as to be movable in the axial direction, and has a cylindrical hole (6) formed in the axial direction; The second piston (8) is inserted into the barrel hole (6) so as to be movable in the axial direction. The double-force mechanism (20) is provided between the first piston (5) and the second piston (8). A plurality of engaging members (22) arranged at predetermined intervals in the circumferential direction are provided. The force multiplier mechanism (20) converts the force that presses the first piston (5) in the axial direction to the multiplier to transmit the force to the first 2 piston (8); The output member (29) is inserted into the barrel hole (51) of the second piston (8) so as to be able to move in the axial direction, and a predetermined interval (L) is left in the axial direction so that it can be connected with the first 2 pistons (8) face each other in abutment; and a spring pushing means (56) is provided between the base end wall (1b) of the housing (1) and the output member (29), and the spring pushing means (29) 56) is to move the output member (29) forward with respect to the second piston (8) Movement.

如請求項6所述之附倍力機構的壓缸裝置，其中，　　前述輸出構件（29）的基端部是可被承接地與前述殼體（1）的基端壁（1b）相面對。The pressure cylinder device with the double force mechanism according to claim 6, wherein: 基 the base end portion of the output member (29) can be grounded to face the base end wall (1b) of the housing (1) .

如請求項6所述之附倍力機構的壓缸裝置，其中，　　前述輸出構件（29）是構成為可透過前述第2活塞（8）來被前述殼體（1）的基端壁（1b）給承接。The cylinder device with a double force mechanism according to claim 6, wherein the output member (29) is configured to be able to be passed through the second piston (8) by the base end wall (1b) of the casing (1). ) To undertake.

如請求項6所述之附倍力機構的壓缸裝置，其中，　　在前述第2活塞（8）與前述輸出構件（29）之間安裝有彈推手段（41），藉由前述彈推手段（41）來彈推使前述第2活塞（8）與前述輸出構件（29）分離。The cylinder device with a double force mechanism according to claim 6, wherein: 弹 a spring pushing means (41) is installed between the second piston (8) and the output member (29), and the spring pushing means (41) A spring push separates the second piston (8) from the output member (29).

如請求項6所述之附倍力機構的壓缸裝置，其中，　　藉由前述第1活塞（5）、前述第2活塞（8）、及前述輸出構件（29）使前述殼體（1）內於軸方向被區隔成鎖固室（15）與釋放室（16），在前述鎖固室（15）及前述釋放室（16）供給排出有壓力流體，　　前述輸出構件（29）的受壓面積（S1），是被設定成比前述第2活塞（8）之環狀受壓部分的受壓面積（S2）還要寬廣。The pressure cylinder device with a double force mechanism according to claim 6, wherein the casing (1) is made of the first piston (5), the second piston (8), and the output member (29). It is divided into a lock chamber (15) and a release chamber (16) in the axial direction. The lock chamber (15) and the release chamber (16) are supplied with a pressure fluid, and the receiving member of the output member (29) receives The pressure area (S1) is set to be wider than the pressure area (S2) of the annular pressure receiving portion of the second piston (8).