10‧‧‧流體壓力缸
10‧‧‧Fluid pressure cylinder
12‧‧‧缸體
12‧‧‧Cylinder
12c‧‧‧螺栓
12c‧‧‧Bolt
14‧‧‧滑動孔
14‧‧‧Sliding hole
14a‧‧‧大徑部
14a‧‧‧Dajing Department
14b‧‧‧小徑部
14b‧‧‧Small diameter
16‧‧‧作動活塞
16‧‧‧actuating piston
18‧‧‧中間構件
18‧‧‧Intermediate member
19‧‧‧防止脫落夾
19‧‧‧Preventing clip
20‧‧‧增力活塞
20‧‧‧Power Piston
22‧‧‧活塞桿
22‧‧‧Piston rod
23‧‧‧活塞單元
23‧‧‧Piston unit
24‧‧‧頭端側端口
24‧‧‧Head-end side port
24a‧‧‧開口部
24a‧‧‧Opening
26‧‧‧末端側端口
26‧‧‧End side port
27‧‧‧鎖固機構
27‧‧‧Locking mechanism
28‧‧‧頭端側本體部
28‧‧‧Head side body
28a‧‧‧頭端部
28a‧‧‧Head end
28b‧‧‧側壁
28b‧‧‧Sidewall
28c‧‧‧連接部
28c‧‧‧Connecting part
28d‧‧‧密封圈
28d‧‧‧Seal ring
30‧‧‧末端側本體部
30‧‧‧End side body
30a‧‧‧貫通孔
30a‧‧‧through hole
30b‧‧‧收容部
30b‧‧‧Containment Department
30c‧‧‧側壁
30c‧‧‧Wall
30d‧‧‧桿罩蓋裝設部
30d‧‧‧Rod cover installation part
30e‧‧‧卡止槽
30e‧‧‧Locking groove
30f、30g‧‧‧開口部
30f、30g‧‧‧Opening
31‧‧‧開關機構
31‧‧‧Switch mechanism
32‧‧‧桿罩蓋
32‧‧‧Rod cover
32a‧‧‧貫通孔
32a‧‧‧Through hole
32c‧‧‧第一環狀槽
32c‧‧‧First annular groove
32d‧‧‧第二環狀槽
32d‧‧‧Second ring groove
32e、32f、32g‧‧‧密封圈
32e, 32f, 32g‧‧‧Sealing ring
33‧‧‧桿密封圈
33‧‧‧Rod seal
34、36‧‧‧減震器
34、36‧‧‧Shock absorber
34a、36a‧‧‧減震器裝設槽
34a, 36a‧‧‧Shock absorber mounting groove
35‧‧‧活塞本體
35‧‧‧Piston body
35a、35b‧‧‧端面
35a, 35b‧‧‧end face
35c‧‧‧彈推構件裝設槽
35c‧‧‧Pushing member installation slot
38‧‧‧耐磨環
38‧‧‧Wear ring
38a‧‧‧耐磨環配置槽
38a‧‧‧Wear ring configuration groove
40‧‧‧磁鐵
40‧‧‧Magnet
40a‧‧‧磁鐵配置槽
40a‧‧‧Magnet configuration slot
42‧‧‧密封圈
42‧‧‧Seal
42a‧‧‧密封圈裝設槽
42a‧‧‧Sealing ring installation groove
44‧‧‧彈推構件
44‧‧‧Pushing member
46‧‧‧中間部本體
46‧‧‧Middle body
46a‧‧‧端面
46a‧‧‧end face
46c‧‧‧彈推構件裝設槽
46c‧‧‧Pushing member installation slot
46d‧‧‧貫穿孔
46d‧‧‧through hole
48‧‧‧密封圈
48‧‧‧Seal
48a‧‧‧密封圈裝設槽
48a‧‧‧Sealing ring installation groove
50‧‧‧卡合凹部
50‧‧‧Clamping recess
52‧‧‧密封圈
52‧‧‧Seal
52a‧‧‧密封圈裝設槽
52a‧‧‧Seal ring mounting groove
54‧‧‧耐磨環
54‧‧‧Wear ring
54a、56a‧‧‧耐磨環配置槽
54a, 56a‧‧‧Wear ring configuration groove
55‧‧‧缺口部
55‧‧‧Notch
56‧‧‧耐磨環
56‧‧‧Wear ring
56b‧‧‧增力氣體通路
56b‧‧‧Strengthening gas passage
58‧‧‧活塞本體
58‧‧‧Piston body
58b‧‧‧端面
58b‧‧‧end face
59‧‧‧密封圈
59‧‧‧Seal ring
60‧‧‧密封圈
60‧‧‧Seal ring
60a‧‧‧密封圈裝設槽
60a‧‧‧Sealing ring installation groove
62‧‧‧第一桿
62‧‧‧First shot
63‧‧‧桿內流路
63‧‧‧In-rod flow path
64‧‧‧第二桿
64‧‧‧Second shot
66‧‧‧偵測銷
66‧‧‧Detection pin
66a‧‧‧突出部
66a‧‧‧Protrusion
66b‧‧‧基軸部
66b‧‧‧Base shaft
66c‧‧‧槽部
66c‧‧‧Slot
66e‧‧‧密封圈
66e‧‧‧Seal ring
66e1‧‧‧槽部
66e1‧‧‧Groove
68‧‧‧孔部
68‧‧‧Kongbu
68a‧‧‧擴徑部
68a‧‧‧Expanded part
68b‧‧‧縮徑部
68b‧‧‧Reduced diameter
70‧‧‧彈性構件
70‧‧‧Elastic member
71‧‧‧蓋構件
71‧‧‧Cover member
71a‧‧‧密封圈
71a‧‧‧Seal ring
71b‧‧‧防止脫落銷
71b‧‧‧Preventing pin
74‧‧‧偵測銷貫穿部
74‧‧‧Detection pin penetration
74a‧‧‧偵測銷貫穿孔
74a‧‧‧Detection pin through hole
74b、74c‧‧‧密封圈
74b、74c‧‧‧Sealing ring
76‧‧‧第一流路
76‧‧‧First Stream
78、80‧‧‧連通孔
78、80‧‧‧Connecting hole
82‧‧‧第二流路
82‧‧‧Second Stream
83‧‧‧第三流路
83‧‧‧Third Stream
84‧‧‧罩蓋構件
84‧‧‧Cover member
84a‧‧‧卡止具
84a‧‧‧Locking device
84b‧‧‧密封圈
84b‧‧‧Seal ring
86‧‧‧空洞部
86‧‧‧cavity
86a‧‧‧第一空室
86a‧‧‧First empty room
86b‧‧‧第二空室
86b‧‧‧Second Empty Room
86d‧‧‧貫穿孔
86d‧‧‧through hole
88‧‧‧減震器
88‧‧‧Shock Absorber
90‧‧‧鎖固銷
90‧‧‧Locking pin
92‧‧‧受壓部
92‧‧‧Pressure
92a‧‧‧密封圈
92a‧‧‧Seal ring
94‧‧‧銷本體部
94‧‧‧Pin body
94a‧‧‧密封圈
94a‧‧‧Sealing ring
96‧‧‧氣體導入孔
96‧‧‧Gas inlet
96c‧‧‧連通孔部
96c‧‧‧Connecting hole
97‧‧‧擋止件
97‧‧‧stop
97a‧‧‧內孔
97a‧‧‧Inner hole
97b‧‧‧密封圈
97b‧‧‧Seal ring
98‧‧‧止回閥
98‧‧‧Check valve
98a‧‧‧閥體
98a‧‧‧Valve body
98b‧‧‧突起部
98b‧‧‧Protrusion
100、102‧‧‧彈性構件
100、102‧‧‧Elastic member
104‧‧‧高壓氣體供給源
104‧‧‧High pressure gas supply source
105‧‧‧止回閥
105‧‧‧Check valve
106‧‧‧節流閥
106‧‧‧Throttle valve
108‧‧‧排氣口
108‧‧‧Exhaust port
110‧‧‧切換閥
110‧‧‧Switching valve
110a‧‧‧第一端口
110a‧‧‧First port
110b‧‧‧第二端口
110b‧‧‧Second port
110c‧‧‧第三端口
110c‧‧‧Third port
110d‧‧‧第四端口
110d‧‧‧Fourth port
110e‧‧‧第五端口
110e‧‧‧Fifth port
120‧‧‧驅動裝置
120‧‧‧Drive device
200‧‧‧缸裝置
200‧‧‧Cylinder device
214a‧‧‧第一壓力室
214a‧‧‧First pressure chamber
214b‧‧‧第二壓力室
214b‧‧‧Second pressure chamber
214c‧‧‧第三壓力室
214c‧‧‧The third pressure chamber
214d‧‧‧第四壓力室
214d‧‧‧The fourth pressure chamber
第1圖係為本發明之實施型態之流體壓力缸的立體圖。
Figure 1 is a perspective view of a fluid pressure cylinder of an embodiment of the present invention.
第2圖係為第1圖之流體壓力缸的剖面圖。
Figure 2 is a cross-sectional view of the fluid pressure cylinder of Figure 1.
第3A圖係為第2圖之開關(switch)機構的放大剖面圖，第3B圖係為將第3A圖之開關機構在偵測銷(pin)被推壓之狀態下予以顯示的放大剖面圖。
Fig. 3A is an enlarged cross-sectional view of the switch mechanism of Fig. 2, and Fig. 3B is an enlarged cross-sectional view showing the switch mechanism of Fig. 3A in a state where the detection pin is pressed .
第4A圖係為第2圖之鎖固機構的放大剖面圖，第4B圖係為將第4A圖之鎖固機構在鎖固的狀態下予以顯示的放大剖面圖。
Fig. 4A is an enlarged cross-sectional view of the locking mechanism of Fig. 2, and Fig. 4B is an enlarged cross-sectional view showing the locking mechanism of Fig. 4A in a locked state.
第5圖係為第1圖之流體壓力缸及驅動裝置的流體線路圖。
Figure 5 is a fluid circuit diagram of the fluid pressure cylinder and driving device of Figure 1.
第6圖係為第1圖之流體壓力缸之鎖固機構作動之狀態的剖面圖。
Fig. 6 is a cross-sectional view of the locking mechanism of the fluid pressure cylinder of Fig. 1 in operation.
第7圖係為第1圖之流體壓力缸之活塞單元(piston unit)到達行程末端之狀態的剖面圖。
Figure 7 is a cross-sectional view of the state where the piston unit of the fluid pressure cylinder of Figure 1 reaches the end of its stroke.
第8圖係為第1圖之流體壓力缸之驅動裝置在復原步驟的流體線路圖。
Fig. 8 is a fluid circuit diagram of the driving device of the fluid pressure cylinder of Fig. 1 in the restoration step.
第9圖係為第1圖之流體壓力缸之復原中途的剖面圖。
Figure 9 is a cross-sectional view of the fluid pressure cylinder in Figure 1 in the middle of its restoration.
第10圖係為第1圖之流體壓力缸之活塞單元到達始端位置之狀態的剖面圖。
Fig. 10 is a cross-sectional view of the state where the piston unit of the fluid pressure cylinder of Fig. 1 reaches the starting end position.
以下列舉本發明之較佳實施型態，並參照所附圖式進行詳細地說明。另外，為了便於說明，圖式的尺寸比率有時會誇張表現而與實際的比率不同。此外，在以下的說明中，茲將行程的始端側亦稱為頭端側(一端側)，行程末端側亦稱為末端側(另一端側)。此外，在本說明書中，所謂「氣體(air)」係泛指氣體狀的作動流體，並未限定為空氣。
Hereinafter, the preferred implementation modes of the present invention are listed and described in detail with reference to the accompanying drawings. In addition, for the convenience of explanation, the size ratio of the drawings may be exaggerated and different from the actual ratio. In addition, in the following description, the start end side of the stroke is also referred to as the head end side (one end side), and the stroke end side is also referred to as the end side (the other end side). In addition, in this specification, the term "air" generally refers to a gaseous operating fluid, and is not limited to air.
如第1圖所示，實施型態之流體壓力缸10係具備朝軸方向伸長的角型缸體(cylinder body)12。缸體12係例如藉由鋁合金等金屬材料所形成。如第2圖所示，在缸體12的內部，係形成有圓形的滑動孔14(缸室)。如第1圖所示，缸體12係具備設於頭端側的頭端側本體部28與設於末端側的末端側本體部30，兩者係藉由複數個連結桿或螺栓(bolt)12c在軸方向上鎖固。在頭端側本體部28之頭端側的端部附近，係形成有頭端側端口(port)24。此外，在末端側本體部30的末端側端部附近，係形成有末端側端口26。流體壓力缸10係構成為在作動步驟中從頭端側端口24供給高壓的氣體(作動流體)，且從末端側端口26進行內部之氣體的排氣，藉此使活塞桿22突出。此時，構成為頭端側本體部28係產生大的行程動作，而末端側本體部30則在行程後半產生追加的推力。
As shown in FIG. 1, the fluid pressure cylinder 10 of the embodiment includes an angular cylinder body 12 that extends in the axial direction. The cylinder 12 is formed of, for example, a metal material such as aluminum alloy. As shown in Fig. 2, a circular sliding hole 14 (cylinder chamber) is formed inside the cylinder 12. As shown in Figure 1, the cylinder 12 is provided with a head-end side body portion 28 provided on the tip side and a tip side body portion 30 provided on the tip side, both of which are provided by a plurality of connecting rods or bolts. 12c is locked in the axial direction. A head end side port 24 is formed near the end of the head end side main body portion 28. In addition, a terminal side port 26 is formed in the vicinity of the terminal side end of the terminal side main body portion 30. The fluid pressure cylinder 10 is configured to supply high-pressure gas (operating fluid) from the head end side port 24 in the actuation step, and exhaust the gas inside from the end side port 26, thereby causing the piston rod 22 to protrude. At this time, the head end side body portion 28 is configured to generate a large stroke motion, and the tip side body portion 30 generates an additional thrust force in the latter half of the stroke.
如第2圖所示，缸體12的頭端側本體部28係具備：構成滑動孔14之一部分的大徑部14a、頭端側端口24及連接部28c。大徑部14a之形成於側壁28b之向內方的剖面為圓形中空部，且朝軸方向延伸。在大徑部14a的一端係形成有頭端側本體部28的頭端部28a，藉由此頭端部28a而封住了滑動孔14的頭端側。
As shown in FIG. 2, the head-end side main body portion 28 of the cylinder block 12 includes a large-diameter portion 14 a constituting a part of the sliding hole 14, a head-end side port 24, and a connecting portion 28 c. The cross section of the large diameter portion 14a formed in the inward side of the side wall 28b is a circular hollow portion and extends in the axial direction. The head end part 28a of the head end side main body part 28 is formed at one end of the large diameter part 14a, and the head end side of the slide hole 14 is sealed by this head end part 28a.
在頭端部28a的附近係形成有頭端側端口24，該頭端側端口24係貫通側壁28b且與大徑部14a連通。於頭端側端口24形成有開口部24a，且經由此開口部24a而與第一流路76連通。第一流路76係朝向末端側本體部30而往軸方向延伸。
A head end side port 24 is formed in the vicinity of the head end portion 28a, and the head end side port 24 penetrates the side wall 28b and communicates with the large diameter portion 14a. An opening 24a is formed in the head end side port 24, and communicates with the first flow path 76 through the opening 24a. The first flow path 76 extends in the axial direction toward the terminal body portion 30.
在頭端側本體部28的末端側係形成有外徑形成為圓筒狀之薄壁的連接部28c。構成為連接部28c收容於末端側本體部30的收容部30b中，從而連接頭端側本體部28與末端側本體部30。在連接部28c的外周部，係安裝有用以防止氣體從滑動孔14洩漏的密封圈(packing)28d。
A thin connecting portion 28c having a cylindrical outer diameter is formed on the distal end side of the head-end side main body portion 28. It is configured that the connecting portion 28 c is accommodated in the receiving portion 30 b of the tip side body portion 30 to connect the tip side body portion 28 and the tip side body portion 30. On the outer periphery of the connecting portion 28c, a packing 28d is installed to prevent gas leakage from the sliding hole 14.
另一方面，在缸體12的末端側本體部30中，係形成有朝軸方向延伸的貫通孔30a。貫通孔30a的另一端部係藉由桿罩蓋(rod cover)32而封住。此外，缸體12係具有末端側端口26、鎖固機構27、開關機構31、第一流路76、第二流路82及第三流路83。貫通孔30a係為形成於末端側本體部30之側壁30c之內側的圓形中空部，從頭端側依序形成有收容部30b、小徑部14b、桿罩蓋裝設部30d及卡止槽30e。
On the other hand, in the distal body portion 30 of the cylinder 12, a through hole 30a extending in the axial direction is formed. The other end of the through hole 30 a is sealed by a rod cover 32. In addition, the cylinder 12 has a terminal side port 26, a lock mechanism 27, a switch mechanism 31, a first flow path 76, a second flow path 82, and a third flow path 83. The through hole 30a is a circular hollow formed on the inside of the side wall 30c of the end side body portion 30. A receiving portion 30b, a small diameter portion 14b, a rod cover mounting portion 30d, and a locking groove are sequentially formed from the tip side 30e.
收容部30b係形成為與連接部28c之外徑大致相同的直徑，其構成為可供連接部28c插入。收容部30b係與連接部28c的密封圈28d緊貼，從而將滑動孔14氣密地密封。
The receiving portion 30b is formed to have a diameter approximately the same as the outer diameter of the connecting portion 28c, and is configured to allow the connecting portion 28c to be inserted. The receiving portion 30b is in close contact with the sealing ring 28d of the connecting portion 28c, thereby airtightly sealing the sliding hole 14.
小徑部14b係形成為較頭端側本體部28之大徑部14a之內徑稍小的內徑，於滑動孔14中小徑部14b係朝徑方向內方突出。在此小徑部14b中，構成為由後述的增力活塞20作動，而在行程後半產生推力。小徑部14b之軸方向的長度，係依據欲使推力增加之行程的長度而適當設定。
The small-diameter portion 14b is formed to have an inner diameter slightly smaller than the inner diameter of the large-diameter portion 14a of the head-end side body portion 28, and the small-diameter portion 14b in the sliding hole 14 protrudes inward in the radial direction. The small-diameter portion 14b is configured to be actuated by the booster piston 20 described later to generate thrust in the latter half of the stroke. The length in the axial direction of the small diameter portion 14b is appropriately set according to the length of the stroke to increase the thrust.
桿罩蓋裝設部30d係設於貫通孔30a的末端側，且配合桿罩蓋32的外徑來形成以供裝設桿罩蓋32。在桿罩蓋裝設部30d中，係形成有與第一流路76連通的開口部30f，及與第二流路82連通的開口部30g。開口部30f係形成於較開口部30g更靠末端側。此外，卡止槽30e係為了裝設桿罩蓋32之防止脫落用之防止脫落夾(clip)19所形成的槽，其朝周方向涵蓋全區域而形成為環狀。如第1圖所示，防止脫落夾19係為周方向之一部分有缺口的環狀板構件，而插入於卡止槽30e的防止脫落夾19，係藉由彈性復原力而卡合於卡止槽30e。防止脫落夾19係與桿罩蓋32的末端側抵接而阻止桿罩蓋32的脫落。
The rod cover mounting portion 30d is provided on the end side of the through hole 30a, and is formed to match the outer diameter of the rod cover 32 for mounting the rod cover 32. In the rod cover installation portion 30d, an opening 30f communicating with the first flow path 76 and an opening 30g communicating with the second flow path 82 are formed. The opening 30f is formed on the tip side of the opening 30g. In addition, the locking groove 30e is a groove formed to install a fall-off prevention clip 19 for preventing fall-off of the rod cover 32, and is formed in a ring shape covering the entire area in the circumferential direction. As shown in Figure 1, the fall-off prevention clip 19 is a ring-shaped plate member with a notch in a part of the circumferential direction, and the fall-off prevention clip 19 inserted into the locking groove 30e is engaged with the locking by elastic restoring force槽30e. The fall prevention clip 19 is in contact with the distal end side of the rod cover 32 to prevent the rod cover 32 from falling off.
桿罩蓋32係形成為大致圓柱狀，在其外周部形成有第一環狀槽32c及第二環狀槽32d，並且裝設有圓形環狀的密封圈32e、32f、32g。密封圈32e係配置在桿罩蓋32與小徑部14b之間，而將滑動孔14予以氣密地密封。在密封圈32e的末端側，係形成有第一環狀槽32c。第一環狀槽32c係涵蓋桿罩蓋32之周方向的全周而形成，並且形成於與開口部30g在軸方向上相同的位置，且經由開口部30g而與第二流路82連通。
The rod cover 32 is formed in a substantially cylindrical shape, and a first annular groove 32c and a second annular groove 32d are formed on the outer periphery thereof, and ring-shaped seal rings 32e, 32f, and 32g are installed. The seal ring 32e is arranged between the rod cover 32 and the small diameter portion 14b, and seals the sliding hole 14 airtightly. On the tip side of the seal ring 32e, a first annular groove 32c is formed. The first annular groove 32c is formed to cover the entire circumference of the rod cover 32 in the circumferential direction, is formed at the same position in the axial direction as the opening 30g, and communicates with the second flow path 82 via the opening 30g.
此外，在第一環狀槽32c的末端側係設有密封圈32f。密封圈32f係將第一環狀槽32c予以氣密地密封。在密封圈32f的末端側係形成有第二環狀槽32d。第二環狀槽32d係涵蓋桿罩蓋32之周方向的全周而
形成，並且形成於與開口部30f在軸方向上相同的位置。第二環狀槽32d係經由開口部30f而與第一流路76連通。密封圈32g係裝設於第二環狀槽32d的末端側，將第二環狀槽32d予以氣密地密封。
In addition, a seal ring 32f is provided on the end side of the first annular groove 32c. The sealing ring 32f hermetically seals the first annular groove 32c. A second annular groove 32d is formed on the end side of the seal ring 32f. The second annular groove 32d covers the entire circumference of the rod cover 32 in the circumferential direction.
It is formed and formed at the same position in the axial direction as the opening 30f. The second annular groove 32d communicates with the first flow path 76 via the opening 30f. The sealing ring 32g is installed on the end side of the second annular groove 32d, and hermetically seals the second annular groove 32d.
在桿罩蓋32之徑方向的中心附近，係朝軸方向延伸地形成有供活塞桿22貫穿的貫通孔32a。在貫通孔32a中，係設有阻止氣體沿著活塞桿22洩漏的桿密封圈33。此外，在桿罩蓋32中，係設有開關機構31。
Near the center of the rod cover 32 in the radial direction, a through hole 32 a through which the piston rod 22 penetrates is formed to extend in the axial direction. In the through hole 32a, a rod seal 33 that prevents gas from leaking along the piston rod 22 is provided. In addition, a switch mechanism 31 is provided in the lever cover 32.
如第3A圖所示，開關機構31係具備朝軸方向貫通桿罩蓋32的孔部68，及插入於該孔部68的偵測銷66。孔部68係具有形成於末端側的擴徑部68a，及形成於頭端側的縮徑部68b。擴徑部68a係具有較偵測銷66之外徑更大的內徑。另一方面，縮徑部68b係具有與偵測銷66之基軸部66b之外徑大致相同大小的內徑。擴徑部68a係經由朝徑方向外方延伸的連通孔78而與第二環狀槽32d連通。亦即，擴徑部68a係經由連通孔78、第二環狀槽32d、開口部30f而與第一流路76連通。另一方面，縮徑部68b係經由朝徑方向外方延伸的連通孔80而與第一環狀槽32c連通。亦即，縮徑部68b係經由連通孔80、第一環狀槽32c及開口部30g而與第二流路82連通。
As shown in FIG. 3A, the switch mechanism 31 includes a hole 68 penetrating the rod cover 32 in the axial direction, and a detection pin 66 inserted into the hole 68. The hole portion 68 has an enlarged diameter portion 68a formed on the tip end side and a reduced diameter portion 68b formed on the tip end side. The enlarged diameter portion 68 a has an inner diameter larger than the outer diameter of the detecting pin 66. On the other hand, the reduced diameter portion 68b has an inner diameter approximately the same as the outer diameter of the base shaft portion 66b of the detection pin 66. The enlarged diameter portion 68a communicates with the second annular groove 32d through a communication hole 78 extending outward in the radial direction. That is, the enlarged diameter portion 68a communicates with the first flow path 76 via the communication hole 78, the second annular groove 32d, and the opening 30f. On the other hand, the reduced diameter portion 68b communicates with the first annular groove 32c via a communication hole 80 extending outward in the radial direction. That is, the reduced diameter portion 68b communicates with the second flow path 82 via the communication hole 80, the first annular groove 32c, and the opening 30g.
偵測銷66係具備：基軸部66b，係形成為與縮徑部68b大致相同的外徑；及突出部66a，係從基軸部66b朝滑動孔14側伸出。在基軸部66b的外周部係形成有環狀的槽部66e1，而在該槽部66e1則裝設有圓形環狀的密封圈66e。密封圈66e一邊彈性變形並一邊與縮徑部68b抵接而將連通孔78與連通孔80予以氣密地密封。在孔部68的末端側係設
有將孔部68密封的蓋構件71，在頭端側係設有偵測銷貫穿部74。蓋構件71係被防止脫落銷71b卡止。在蓋構件71的外周面係裝設有密封圈71a，蓋構件71係將孔部68予以氣密地密封。
The detection pin 66 includes a base shaft portion 66b formed to have approximately the same outer diameter as the reduced diameter portion 68b, and a protruding portion 66a extending from the base shaft portion 66b toward the sliding hole 14 side. An annular groove portion 66e1 is formed on the outer periphery of the base shaft portion 66b, and an annular seal ring 66e is installed in the groove portion 66e1. The seal ring 66e is elastically deformed and abuts on the reduced diameter portion 68b to hermetically seal the communication hole 78 and the communication hole 80. Tie on the end side of the hole 68
There is a cover member 71 that seals the hole 68, and a detection pin penetration portion 74 is provided on the head end side. The cover member 71 is locked by the fall prevention pin 71b. A sealing ring 71a is attached to the outer peripheral surface of the cover member 71, and the cover member 71 seals the hole 68 in an airtight manner.
在偵測銷貫穿部74中係設有偵測銷貫穿孔74a，在該偵測銷貫穿孔74a，以可朝軸方向滑動之方式插入有偵測銷66的突出部66a。在偵測銷貫穿部74中係設有密封圈74b、74c，滑動孔14與孔部68被氣密地封住。在蓋構件71與偵測銷66之間係配置有線圈彈簧等彈性構件70。此彈性構件70係構成為將偵測銷66的基軸部66b朝頭端側(滑動孔14側)推壓。偵測銷66的突出部66a係被來自彈性構件70的彈推力而推壓，保持為突出於滑動孔14內的狀態。此外，在此狀態下藉由偵測銷66的密封圈66e與縮徑部68b的內周面抵接，而使偵測銷66阻止連通孔78與連通孔80的連通。
A detection pin penetration hole 74a is provided in the detection pin penetration portion 74, and a protruding portion 66a of the detection pin 66 is inserted into the detection pin penetration hole 74a to be slidable in the axial direction. Sealing rings 74b and 74c are arranged in the detection pin penetration portion 74, and the sliding hole 14 and the hole portion 68 are hermetically sealed. An elastic member 70 such as a coil spring is arranged between the cover member 71 and the detection pin 66. This elastic member 70 is configured to press the base shaft portion 66b of the detection pin 66 toward the tip end side (the sliding hole 14 side). The protruding portion 66 a of the detection pin 66 is pushed by the elastic force from the elastic member 70 and maintained in a state of protruding into the sliding hole 14. In addition, in this state, the detection pin 66 prevents the communication hole 78 and the communication hole 80 from communicating with the seal ring 66e of the detection pin 66 and the inner peripheral surface of the reduced diameter portion 68b.
偵測銷66係構成為可沿著孔部68朝軸方向移動。如第3B圖所示，當偵測銷66位移至末端側時，密封圈66e即移動至擴徑部68a，而於密封圈66e與孔部68之間產生間隙。在基軸部66b的外周部係形成有槽部66c，經由槽部66c而連通擴徑部68a與縮徑部68b。在此狀態下，連通孔78與連通孔80係經由擴徑部68a及縮徑部68b而連通。此種開關機構31係經由第二流路82而與鎖固機構27(參照第4A圖)連通。
The detection pin 66 is configured to be movable in the axial direction along the hole 68. As shown in FIG. 3B, when the detection pin 66 is displaced to the end side, the sealing ring 66e moves to the enlarged diameter portion 68a, and a gap is formed between the sealing ring 66e and the hole portion 68. A groove portion 66c is formed in the outer peripheral portion of the base shaft portion 66b, and the enlarged diameter portion 68a and the reduced diameter portion 68b are communicated via the groove portion 66c. In this state, the communication hole 78 and the communication hole 80 communicate via the enlarged diameter portion 68a and the reduced diameter portion 68b. Such a switch mechanism 31 communicates with the lock mechanism 27 (refer to FIG. 4A) via the second flow path 82.
如第4A圖所示，鎖固機構27係具備：空洞部86、插入於空洞部86的鎖固銷90及密封空洞部86的罩蓋構件84。空洞部86係形成為以朝圖之上下方向延伸之軸為中心的圓形，且在末端側本體部30之側壁
30c的厚度方向上形成至預定深度。在空洞部86的下端部(內側的端部)，形成有供鎖固銷90貫穿的貫穿孔86d。
As shown in FIG. 4A, the locking mechanism 27 includes a cavity 86, a locking pin 90 inserted into the cavity 86, and a cover member 84 that seals the cavity 86. The cavity 86 is formed in a circular shape centered on an axis extending upward and downward in the figure, and is formed on the side wall of the distal body portion 30
30c is formed to a predetermined depth in the thickness direction. At the lower end (inside end) of the cavity 86, a through hole 86d through which the locking pin 90 passes is formed.
在空洞部86的上端部(外側的端部)，係配置有罩蓋構件84。罩蓋構件84係藉由環狀的卡止具84a而卡止於空洞部86內。在罩蓋構件84的外周部係設有密封圈84b，藉由此密封圈84b而氣密地密封空洞部86的內部。
A cover member 84 is arranged at the upper end (outer end) of the cavity 86. The cover member 84 is locked in the cavity 86 by a ring-shaped locking tool 84a. A sealing ring 84b is provided on the outer periphery of the cover member 84, and the inside of the cavity 86 is hermetically sealed by the sealing ring 84b.
鎖固銷90係具備：受壓部92，係形成於上端部(外側的端部)；銷本體部94，係從受壓部92朝下方伸出；氣體導入孔96，係形成於銷本體部94之中心軸附近；及止回閥98，係設於氣體導入孔96內。受壓部92係為形成為與空洞部86之內徑大致相等之外徑的寬幅的部分，而在其外周部係裝設有環狀的密封圈92a。受壓部92係將空洞部86劃分成第一空室86a與第二空室86b。在第一空室86a中係連通有第二流路82。此外，在第二空室86b中係連通有第三流路83。受壓部92係構成為受到第一空室86a與第二空室86b的壓力差而驅動鎖固銷90。此外，在受壓部92的第二空室86b側，係設有用以補助鎖固銷90的復原動作的彈性構件102。
The locking pin 90 is provided with: a pressure receiving portion 92, which is formed at the upper end (outer end); a pin body portion 94, which protrudes downward from the pressure receiving portion 92; and a gas introduction hole 96, which is formed in the pin body Near the central axis of the part 94; and the check valve 98, which is arranged in the gas introduction hole 96. The pressure receiving portion 92 is a wide portion formed with an outer diameter substantially equal to the inner diameter of the hollow portion 86, and an annular seal ring 92a is attached to its outer periphery. The pressure receiving portion 92 divides the cavity 86 into a first cavity 86a and a second cavity 86b. The second flow path 82 communicates with the first cavity 86a. In addition, a third flow path 83 is communicated with the second cavity 86b. The pressure receiving portion 92 is configured to receive the pressure difference between the first cavity 86a and the second cavity 86b to drive the locking pin 90. In addition, on the side of the second cavity 86 b of the pressure receiving portion 92, an elastic member 102 for assisting the restoration operation of the lock pin 90 is provided.
銷本體部94係形成為較受壓部92更小的直徑，且從受壓部92朝向滑動孔14延伸。銷本體部94的下端部係插入於貫穿孔86d。銷本體部94係構成為藉由貫穿孔86d的密封圈94a密封，同時貫穿貫穿孔86d，從而可朝向滑動孔14突出。
The pin body portion 94 is formed to have a smaller diameter than the pressure receiving portion 92 and extends from the pressure receiving portion 92 toward the sliding hole 14. The lower end of the pin body 94 is inserted into the through hole 86d. The pin main body portion 94 is configured to be sealed by a sealing ring 94a of the through hole 86d, and penetrate through the through hole 86d so as to protrude toward the sliding hole 14.
氣體導入孔96係以朝軸方向貫通鎖固銷90之中心部之方式形成。在氣體導入孔96的上端部(外側的端部)，係裝設有由彈性材料所構成之環狀的減震器(damper)88。在減震器88的下方係裝設有擋止件
(stopper)97，且在其更下方配置有構成止回閥98的閥體98a。閥體98a係為形成為圖的上端被封閉之杯(cup)狀的構件，在其上端係具有緊貼擋止件97從而封閉內孔97a之圓環狀的突起部98b。此外，在閥體98a的外周部係裝設有彈性構件100，該彈性構件100係將閥體98a的突起部98b朝向壓抵於擋止件97的方向彈推。再者，在止回閥98的下方係形成有連通孔部96c，該連通孔部96c係形成為較閥體98a小的內徑，且連通於滑動孔14側。在圖示的狀態下，閥體98a的突起部98b接觸擋止件97，進而擋止件97的外周部被密封圈97b所密封，從而阻止滑動孔14與第二流路82的連通。
The gas introduction hole 96 is formed to penetrate the central portion of the locking pin 90 in the axial direction. At the upper end (outer end) of the gas introduction hole 96, a ring-shaped damper 88 made of an elastic material is installed. A stopper is installed below the shock absorber 88
(stopper) 97, and a valve body 98a constituting a check valve 98 is arranged below it. The valve body 98a is a member formed in a cup shape with the upper end closed in the figure, and has an annular protrusion 98b at the upper end that is in close contact with the stopper 97 to close the inner hole 97a. In addition, an elastic member 100 is installed on the outer periphery of the valve body 98a, and the elastic member 100 urges the protruding portion 98b of the valve body 98a in a direction pressing against the stopper 97. Furthermore, a communication hole 96c is formed below the check valve 98. The communication hole 96c is formed to have a smaller inner diameter than the valve body 98a and communicates with the sliding hole 14 side. In the state shown in the figure, the protrusion 98b of the valve body 98a contacts the stopper 97, and the outer peripheral portion of the stopper 97 is sealed by the sealing ring 97b, thereby preventing the sliding hole 14 from communicating with the second flow path 82.
如第4B圖所示，鎖固機構27係構成為當相對較高之壓力的氣體經由第二流路82流入於第一空室86a時，鎖固銷90即下降。在此情形下，係突出於滑動孔14側。鎖固銷90係構成為在適當的時間點下降，從而使鎖固銷90的前端部卡合於中間構件18的卡合凹部50，而將中間構件18固定於滑動孔14。
As shown in FIG. 4B, the lock mechanism 27 is configured such that when a relatively high pressure gas flows into the first cavity 86a through the second flow path 82, the lock pin 90 is lowered. In this case, the system protrudes from the sliding hole 14 side. The lock pin 90 is configured to be lowered at an appropriate point in time so that the front end of the lock pin 90 is engaged with the engagement recess 50 of the intermediate member 18 and the intermediate member 18 is fixed to the sliding hole 14.
此外，當相對較高壓力的氣體經由第二流路82而流入擋止件97的內孔97a時，止回閥98的閥體98a即下降。再者，構成為解除滑動孔14與第二流路82的密封。亦即，形成為來自第二流路82的氣體可流入滑動孔14側。
In addition, when a relatively high-pressure gas flows into the inner hole 97a of the stopper 97 through the second flow path 82, the valve body 98a of the check valve 98 is lowered. Furthermore, it is configured to release the sealing between the sliding hole 14 and the second flow path 82. That is, it is formed so that the gas from the second flow path 82 can flow into the sliding hole 14 side.
如第2圖所示，末端側端口26係設於滑動孔14之末端側之端部的附近，並與滑動孔14連通。第三流路83係與末端側端口26連通。
As shown in FIG. 2, the terminal side port 26 is provided in the vicinity of the end of the sliding hole 14 on the terminal side, and communicates with the sliding hole 14. The third flow path 83 communicates with the terminal side port 26.
在滑動孔14的內部係配設有具備作動活塞16、中間構件18及增力活塞20的活塞單元23。活塞單元23係以可朝軸方向滑動於滑動孔14內之方式被收容，且將滑動孔14的內部區隔為頭端側端口24側的第一壓力室214a，與末端側端口26側的第二壓力室214b。在本實施形態中，活塞單元23係具備：作動活塞16，係設於頭端側；增力活塞20，係設於末端側；中間構件18，係配置於作動活塞16與增力活塞20之間；及彈推構件44，係配置於中間構件18與作動活塞16之間。其中，作動活塞16及增力活塞20係連結於活塞桿22。
A piston unit 23 including an actuating piston 16, an intermediate member 18 and a booster piston 20 is arranged inside the sliding hole 14. The piston unit 23 is housed in such a way that it can slide in the sliding hole 14 in the axial direction, and divides the inside of the sliding hole 14 into a first pressure chamber 214a on the side of the head end side port 24 and a first pressure chamber 214a on the side of the end side port 24 and The second pressure chamber 214b. In this embodiment, the piston unit 23 is provided with: the actuating piston 16 is arranged on the head end side; the booster piston 20 is arranged on the end side; the intermediate member 18 is arranged between the actuating piston 16 and the booster piston 20 Between; and the elastic pushing member 44, is arranged between the intermediate member 18 and the actuating piston 16. Among them, the actuating piston 16 and the booster piston 20 are connected to the piston rod 22.
作動活塞16係具有：圓形的活塞本體35，係從活塞桿22朝徑方向外方突出；耐磨環(wear ring)38，係裝設於活塞本體35的外周部；磁鐵40，係裝設於活塞本體35的外周部；圓形環狀的密封圈42，係裝設於活塞本體35的外周部；及減震器34，係裝設於活塞本體35的基端面。
The actuating piston 16 has: a circular piston body 35 that protrudes radially outward from the piston rod 22; a wear ring 38 that is installed on the outer periphery of the piston body 35; and a magnet 40 is attached It is provided on the outer circumference of the piston body 35; a circular ring-shaped sealing ring 42 is installed on the outer circumference of the piston body 35; and a shock absorber 34 is installed on the base end surface of the piston body 35.
在活塞本體35的外周面係設有耐磨環配置槽38a、磁鐵配置槽40a及密封圈裝設槽42a。耐磨環配置槽38a係設於活塞本體35的基端附近。磁鐵配置槽40a係與耐磨環配置槽38a的末端側鄰接配置，密封圈裝設槽42a係配置於耐磨環配置槽38a的更靠末端側。耐磨環配置槽38a、磁鐵配置槽40a及密封圈裝設槽42a，均形成為涵蓋周方向的全周延伸的圓形環狀。
The outer peripheral surface of the piston body 35 is provided with a wear ring arrangement groove 38a, a magnet arrangement groove 40a, and a seal ring installation groove 42a. The wear ring arrangement groove 38 a is provided near the base end of the piston body 35. The magnet arrangement groove 40a is arranged adjacent to the end side of the wear ring arrangement groove 38a, and the seal ring installation groove 42a is arranged on the end side of the wear ring arrangement groove 38a. The wear ring arrangement groove 38a, the magnet arrangement groove 40a, and the seal ring installation groove 42a are all formed in a circular ring shape extending over the entire circumference in the circumferential direction.
在活塞本體35之頭端側的端面35a，係形成有圓形環狀的減震器裝設槽34a。在減震器裝設槽34a係裝設有減震器34。減震器34係例如由橡膠材或彈性體(elastomer)材等彈性材料所構成，並形成為圓形環
狀。減震器34係構成為較活塞本體35的端面35a更往頭端側突出，藉此防止在活塞本體35復原時，頭端部28a與活塞本體35的撞擊。
On the end surface 35a on the head end side of the piston body 35, a circular ring-shaped shock absorber mounting groove 34a is formed. A shock absorber 34 is installed in the shock absorber installation groove 34a. The shock absorber 34 is made of an elastic material such as a rubber material or an elastomer material, and is formed as a circular ring
shape. The shock absorber 34 is configured to protrude further to the head end side than the end face 35a of the piston main body 35, thereby preventing the head end 28a from colliding with the piston main body 35 when the piston main body 35 is restored.
在活塞本體35之末端側的端面35b(相對向於中間構件18的面)，係形成有彈推構件裝設槽35c。在此彈推構件裝設槽35c中係裝設有後述的彈推構件44。
On the end surface 35b (the surface facing the intermediate member 18) on the distal end side of the piston body 35, an elastic member mounting groove 35c is formed. The elastic pushing member 44 described later is installed in the elastic pushing member installation groove 35c.
活塞本體35係例如藉由碳鋼、不鏽鋼、鋁合金等金屬材料或硬質樹脂等所形成。密封圈42係為由橡膠材或彈性體材等彈性材料所構成的環狀密封構件(例如O環)。密封圈42係可滑動地接觸滑動孔14之內周面。藉由密封圈42，將作動活塞16與滑動孔14之內周面之間密封，且將滑動孔14的第一壓力室214a氣密地區隔。
The piston body 35 is formed of, for example, metal materials such as carbon steel, stainless steel, aluminum alloy, or hard resin. The seal ring 42 is an annular seal member (for example, an O ring) made of an elastic material such as a rubber material or an elastomer material. The sealing ring 42 slidably contacts the inner peripheral surface of the sliding hole 14. The sealing ring 42 seals between the actuating piston 16 and the inner peripheral surface of the sliding hole 14, and the first pressure chamber 214 a of the sliding hole 14 is airtightly partitioned.
耐磨環38係例如由聚四氟乙烯(Polytetrafluoroethylene，PTFE)之類之具低摩擦性與耐磨耗性的合成樹脂材料或金屬材料(例如軸承鋼)等所構成。磁鐵40係例如由形成為環狀的鐵氧磁體(ferrite)磁鐵或稀土類磁鐵等所構成。磁鐵40亦可使用沿周方向分割者。
The wear ring 38 is made of, for example, polytetrafluoroethylene (PTFE), a synthetic resin material with low friction and wear resistance, or a metal material (such as bearing steel). The magnet 40 is composed of, for example, a ferrite magnet or a rare earth magnet formed in a ring shape. The magnet 40 may be divided in the circumferential direction.
中間構件18係具備：圓形的中間部本體46，係朝活塞桿22的徑方向外方突出；貫穿孔46d，係形成於中間部本體46的中心部；耐磨環54、56，係設於中間部本體46的外周面；密封圈52，係設於中間部本體46的外周面；及卡合凹部50，係設於中間部本體46的外周面。
The intermediate member 18 is provided with: a circular intermediate body 46 that protrudes outward in the radial direction of the piston rod 22; a through hole 46d formed in the center of the intermediate body 46; and wear rings 54 and 56 are provided with On the outer peripheral surface of the intermediate body 46; the sealing ring 52 is arranged on the outer peripheral surface of the intermediate body 46; and the engaging recess 50 is arranged on the outer peripheral surface of the intermediate body 46.
中間部本體46的貫穿孔46d係形成為較活塞桿22之直徑稍大的內徑，並構成為可相對於活塞桿22朝軸方向貫穿。在貫穿孔46d的內周面係形成有圓環狀的密封圈裝設槽48a，而在該密封圈裝設槽48a則
裝設有圓形環狀的密封圈48。此外，在密封圈48之頭端側的貫穿孔46d中係形成有將貫穿孔46d朝徑方向外方擴展而成的環狀缺口部55。
The through hole 46 d of the intermediate body 46 is formed to have an inner diameter slightly larger than the diameter of the piston rod 22, and is configured to be able to penetrate the piston rod 22 in the axial direction. An annular seal ring installation groove 48a is formed on the inner peripheral surface of the through hole 46d, and the seal ring installation groove 48a is
A circular ring-shaped sealing ring 48 is installed. In addition, an annular notch 55 formed by expanding the through hole 46d outward in the radial direction is formed in the through hole 46d on the tip end side of the seal ring 48.
在中間部本體46的外周面係設有卡合凹部50、密封圈裝設槽52a及耐磨環配置槽54a、56a。耐磨環配置槽54a係設於中間部本體46之頭端側的端部，耐磨環配置槽56a係設於中間部本體46之末端側的端部。耐磨環配置槽56a係供裝設耐磨環56，而耐磨環配置槽54a則供裝設耐磨環54。在耐磨環56中，係設有將周方向之一部分作成缺口而成的增力氣體通路56b。此增力氣體通路56b係與第三壓力室214c(參照第6圖)連通。
The outer peripheral surface of the intermediate body 46 is provided with an engaging recess 50, a sealing ring installation groove 52a, and a wear ring arrangement groove 54a, 56a. The wear ring arrangement groove 54 a is provided at the end of the middle body 46 on the head end side, and the wear ring arrangement groove 56 a is provided at the end of the middle body 46 on the tip end side. The wear ring arrangement groove 56 a is for installing the wear ring 56, and the wear ring arrangement groove 54 a is for installing the wear ring 54. The wear ring 56 is provided with a booster gas passage 56b in which a part in the circumferential direction is notched. The booster gas passage 56b communicates with the third pressure chamber 214c (refer to FIG. 6).
卡合凹部50係涵蓋中間部本體46之外周面之周方向的全周而形成為環狀。卡合凹部50之軸方向的寬度係形成為與鎖固機構27之鎖固銷90之前端部的直徑相等或較其稍大。在卡合凹部50與耐磨環配置槽54a之間係形成有密封圈裝設槽52a。該密封圈裝設槽52a係供裝設密封圈52。藉由密封圈48及密封圈52，將在中間構件18與增力活塞20之間所產生的第三壓力室214c(參照第7圖)及中間構件18與作動活塞16之間的第四壓力室214d予以氣密地區隔。
The engaging recess 50 is formed in a ring shape to cover the entire circumference of the outer peripheral surface of the intermediate portion main body 46 in the circumferential direction. The width of the engagement recess 50 in the axial direction is formed to be equal to or slightly larger than the diameter of the front end of the locking pin 90 of the locking mechanism 27. A sealing ring installation groove 52a is formed between the engagement recess 50 and the wear ring arrangement groove 54a. The sealing ring mounting groove 52 a is for mounting the sealing ring 52. With the sealing ring 48 and the sealing ring 52, the third pressure chamber 214c (refer to FIG. 7) generated between the intermediate member 18 and the booster piston 20 and the fourth pressure between the intermediate member 18 and the actuating piston 16 Room 214d is separated by an airtight area.
在中間部本體46之頭端側的端面46a，係形成有圓環狀的彈推構件裝設槽46c。彈推構件44係一端裝設於彈推構件裝設槽35c，而另一端則裝設於彈推構件裝設槽46c。彈推構件44係例如由線圈彈簧等彈性構件所構成，藉由其彈性復原力，而將中間構件18向著離開作動活塞16的方向彈推。
An annular elastic pushing member installation groove 46c is formed on the end surface 46a on the head end side of the intermediate body 46. One end of the elastic member 44 is installed in the elastic member installation groove 35c, and the other end is installed in the elastic member installation groove 46c. The urging member 44 is composed of, for example, an elastic member such as a coil spring, and its elastic restoring force urges the intermediate member 18 in a direction away from the actuating piston 16.
增力活塞20係具有：圓形的活塞本體58，係從活塞桿22朝徑方向外方突出；圓形環狀的密封圈60，係裝設於活塞本體58的外周部；減震器36，係裝設於活塞本體58之末端側的端面；及圓形環狀的密封圈59，係裝設於活塞本體58的內周部。
The booster piston 20 has: a circular piston body 58 that protrudes radially outward from the piston rod 22; a circular ring-shaped sealing ring 60 that is installed on the outer periphery of the piston body 58; and a shock absorber 36 , Is installed on the end face of the end side of the piston body 58; and a ring-shaped sealing ring 59 is installed on the inner periphery of the piston body 58.
在活塞本體58的外周面，係設有密封圈裝設槽60a。密封圈裝設槽60a係均形成為涵蓋周方向之全周延伸的圓形環狀。密封圈裝設槽60a係供裝設密封圈60。活塞本體58係形成為較滑動孔14之大徑部14a更小的外徑，密封圈60係構成為不與大徑部14a密接。因此，在大徑部14a中，係可供氣體經由活塞本體58與大徑部14a之內周面的間隙流通。另一方面，活塞本體58係在小徑部14b中，將密封圈60與小徑部14b氣密地密封。亦即，在小徑部14b中，活塞本體58係將第三壓力室214c與第二壓力室214b予以氣密地區隔。
On the outer peripheral surface of the piston body 58, a sealing ring installation groove 60a is provided. The sealing ring installation grooves 60a are all formed in a circular ring shape extending over the entire circumference in the circumferential direction. The sealing ring installation groove 60 a is for installing the sealing ring 60. The piston body 58 is formed to have a smaller outer diameter than the large diameter portion 14a of the sliding hole 14, and the seal ring 60 is configured not to be in close contact with the large diameter portion 14a. Therefore, in the large-diameter portion 14a, gas can flow through the gap between the piston body 58 and the inner peripheral surface of the large-diameter portion 14a. On the other hand, the piston body 58 is tied to the small diameter portion 14b, and hermetically seals the seal ring 60 and the small diameter portion 14b. That is, in the small diameter portion 14b, the piston body 58 airtightly partitions the third pressure chamber 214c and the second pressure chamber 214b.
在活塞本體58之末端側的端面58b，係形成有圓形環狀的減震器裝設槽36a。減震器裝設槽36a係供裝設減震器36。在減震器36中係形成有朝徑方向貫通之未圖示的槽。減震器36係構成為由橡膠材或彈性體材等彈性材料所構成，而在行程末端減緩活塞本體58與桿罩蓋32的撞擊。且構成為在如第7圖的行程末端，即使減震器36的整體被壓抵於桿罩蓋32時，亦可藉由上述的槽，使作動流體(氣體)在減震器36之內側與外側之間流通。
On the end surface 58b on the distal end side of the piston body 58, a circular ring-shaped shock absorber installation groove 36a is formed. The shock absorber installation groove 36a is for installing the shock absorber 36. The shock absorber 36 is formed with a not-shown groove penetrating in the radial direction. The shock absorber 36 is composed of an elastic material such as a rubber material or an elastomer material, and reduces the impact of the piston body 58 and the rod cover 32 at the end of the stroke. And it is configured that at the end of the stroke as shown in Fig. 7, even when the entire shock absorber 36 is pressed against the rod cover 32, the above-mentioned groove can allow the operating fluid (gas) to be inside the shock absorber 36 Circulate between and outside.
活塞桿22係由末端側的第一桿62與頭端側的第二桿64所構成，且成為兩者藉由螺釘機構所緊固的構造。在活塞桿22的內部，係形成有連通於第二壓力室214b與第四壓力室214d的桿內流路63。
The piston rod 22 is composed of a first rod 62 on the tip end side and a second rod 64 on the tip end side, and the two are fastened by a screw mechanism. Inside the piston rod 22, a rod-in-rod flow path 63 communicating with the second pressure chamber 214b and the fourth pressure chamber 214d is formed.
以下參照第5圖及第8圖來說明具有上述之流體壓力缸10與驅動裝置120的缸裝置200。
Hereinafter, the cylinder device 200 having the above-mentioned fluid pressure cylinder 10 and the driving device 120 will be described with reference to FIGS. 5 and 8.
流體壓力缸10的驅動裝置120係具備止回閥105、高壓氣體供給源104、節流閥106、排氣口108、切換閥110及預定的配管而成。此驅動裝置120係構成為在作動步驟中，供給高壓流體至滑動孔14的第一壓力室214a，並且在復原步驟中，將蓄積於第一壓力室214a之流體的一部分，朝向第二壓力室214b供給。
The driving device 120 of the fluid pressure cylinder 10 includes a check valve 105, a high-pressure gas supply source 104, a throttle valve 106, an exhaust port 108, a switching valve 110, and predetermined piping. This driving device 120 is configured to supply high-pressure fluid to the first pressure chamber 214a of the sliding hole 14 in the actuation step, and in the restoration step, to direct part of the fluid accumulated in the first pressure chamber 214a toward the second pressure chamber 214b supply.
切換閥110例如為五端口二位置型的閥，具有第一端口110a至第五端口110e，構成為可在第一位置與第二位置之間切換。第一端口110a係藉由配管而連接於第一壓力室214a，並且連接於止回閥105的上游側。第二端口110b係藉由配管而連接於第二壓力室214b。第三端口110c係藉由配管而連接於高壓氣體供給源104。第四端口110d係藉由配管且經由節流閥106而連接於排氣口108。第五端口110e係藉由配管而連接於止回閥105的下游側。
The switching valve 110 is, for example, a five-port two-position valve, has a first port 110a to a fifth port 110e, and is configured to be switchable between the first position and the second position. The first port 110 a is connected to the first pressure chamber 214 a by a pipe, and is connected to the upstream side of the check valve 105. The second port 110b is connected to the second pressure chamber 214b by a pipe. The third port 110c is connected to the high-pressure gas supply source 104 by a pipe. The fourth port 110 d is connected to the exhaust port 108 via the throttle valve 106 by piping. The fifth port 110e is connected to the downstream side of the check valve 105 by piping.
如第5圖所示，在切換閥110位於第一位置時，第一端口110a與第三端口110c會相連，而且，第二端口110b與第四端口110d會相連。此外，如第8圖所示，在切換閥110位於第二位置時，第一端口110a與第四端口110d會相連，而且，第二端口110b與第五端口110e會相連。切換閥110係藉由來自高壓氣體供給源104的引導(pilot)壓力或電磁閥而切換為第一位置與第二位置。
As shown in Figure 5, when the switching valve 110 is in the first position, the first port 110a and the third port 110c will be connected, and the second port 110b and the fourth port 110d will be connected. In addition, as shown in FIG. 8, when the switching valve 110 is in the second position, the first port 110a and the fourth port 110d are connected, and the second port 110b and the fifth port 110e are connected. The switching valve 110 is switched to the first position and the second position by a pilot pressure from the high-pressure gas supply source 104 or a solenoid valve.
止回閥105係在切換閥110位於第二位置時，容許氣體從頭端側端口24朝向末端側端口26的流動，且阻止氣體從末端側端口26朝向頭端側端口24的流動。
When the switching valve 110 is in the second position, the check valve 105 allows gas to flow from the tip side port 24 to the tip side port 26 and prevents the gas flow from the tip side port 26 to the tip side port 24.
節流閥106係為了限制從排氣口108所排出之氣體的量所設，並構成為可變更通路面積的可變節流閥，俾可調整排出流量。
The throttle valve 106 is provided to limit the amount of gas discharged from the exhaust port 108, and is configured as a variable throttle valve whose passage area can be changed to adjust the discharge flow rate.
另外，亦可在連結止回閥105與第五端口110e之配管的中途，設置氣體儲槽(air tank)，而蓄積要從頭端側端口24供給至末端側端口26的氣體。藉由設置氣體儲槽，即可蓄積復原動作時足以填滿第二壓力室214b之量的氣體，而可使復原動作穩定化。此時，氣體儲槽的容量，亦可例如設定為第一壓力室214a之最大容量的大約一半。另外，在可充分確保配管的容積時，不需要氣體儲槽。
In addition, an air tank may be provided in the middle of the pipe connecting the check valve 105 and the fifth port 110e, and the gas to be supplied from the head end side port 24 to the end side port 26 may be accumulated. By providing a gas storage tank, it is possible to accumulate enough gas to fill the second pressure chamber 214b during the recovery operation, and the recovery operation can be stabilized. At this time, the capacity of the gas storage tank can also be set to about half of the maximum capacity of the first pressure chamber 214a, for example. In addition, when the volume of the piping can be sufficiently ensured, a gas storage tank is not required.
流體壓力缸10及其驅動裝置120係構成如上，以下將說明其作用及動作。
The fluid pressure cylinder 10 and its driving device 120 are configured as above, and its function and operation will be described below.
(作動步驟)
(Operation steps)
如第5圖所示，流體壓力缸10的作動步驟，係將驅動裝置120的切換閥110設為第一位置來進行。來自高壓氣體供給源104的高壓氣體，係經由切換閥110的第一端口110a而供給至頭端側端口24。另外，所謂高壓氣體係指較大氣壓更高壓力的氣體。止回閥105係連接於第五端口110e，高壓氣體不會流動於止回閥105側。末端側端口26係連接於切換閥110的第二端口110b，其經由節流閥106而連接於排氣口108。
As shown in FIG. 5, the operation step of the fluid pressure cylinder 10 is performed by setting the switching valve 110 of the driving device 120 to the first position. The high-pressure gas from the high-pressure gas supply source 104 is supplied to the head end side port 24 via the first port 110 a of the switching valve 110. In addition, the so-called high-pressure gas system refers to a gas with a higher pressure and a higher pressure. The check valve 105 is connected to the fifth port 110e, and high-pressure gas does not flow to the side of the check valve 105. The terminal side port 26 is connected to the second port 110 b of the switching valve 110 and is connected to the exhaust port 108 via the throttle valve 106.
如第2圖所示，供給至頭端側端口24的高壓氣體，係流入於滑動孔14的第一壓力室214a。鄰接於作動活塞16的第四壓力室214d，
係經由桿內流路63而與第二壓力室214b連通。因此，相應於活塞本體35之端面35a之表面積與第一壓力室214a及第四壓力室214d之壓力差的驅動力會作用於作動活塞16，作動活塞16即朝向行程末端被推出。中間構件18、增力活塞20及活塞桿22係與作動活塞16一體地位移。第二壓力室214b的氣體，係經由末端側端口26而排出。
As shown in FIG. 2, the high-pressure gas supplied to the head end side port 24 flows into the first pressure chamber 214 a of the sliding hole 14. Adjacent to the fourth pressure chamber 214d of the actuating piston 16,
The system communicates with the second pressure chamber 214b via the rod inner flow path 63. Therefore, the driving force corresponding to the pressure difference between the surface area of the end surface 35a of the piston body 35 and the first pressure chamber 214a and the fourth pressure chamber 214d acts on the actuating piston 16, and the actuating piston 16 is pushed out toward the end of the stroke. The intermediate member 18, the booster piston 20 and the piston rod 22 are displaced integrally with the actuating piston 16. The gas in the second pressure chamber 214b is discharged through the terminal side port 26.
由於增力活塞20的密封圈60未與滑動孔14之大徑部14a的內側面抵接，因此氣體可在第三壓力室214c與第二壓力室214b之間自由地流通。此外，中間構件18係被彈推構件44壓抵至增力活塞20側。另外，在開關機構31中，連通孔78與連通孔80被偵測銷66所封閉。因此，高壓氣體不會被供給至鎖固機構27，鎖固銷90係保持為被拉入於上端側的狀態。
Since the sealing ring 60 of the booster piston 20 does not abut the inner surface of the large diameter portion 14a of the sliding hole 14, the gas can freely circulate between the third pressure chamber 214c and the second pressure chamber 214b. In addition, the intermediate member 18 is pressed by the elastic pushing member 44 to the side of the booster piston 20. In addition, in the switch mechanism 31, the communication hole 78 and the communication hole 80 are closed by the detection pin 66. Therefore, high-pressure gas is not supplied to the lock mechanism 27, and the lock pin 90 is maintained in a state of being pulled in on the upper end side.
在此作動步驟中，係僅以流入至鄰接於作動活塞16之第一壓力室214a的高壓氣體驅動。
In this actuation step, only the high-pressure gas flowing into the first pressure chamber 214a adjacent to the actuation piston 16 is driven.
(增力步驟)
(Amplification step)
如第6圖所示，當活塞單元23位移至行程末端側時，增力活塞20即被推入於小徑部14b。再者，藉由增力活塞20的密封圈60彈性變形地與小徑部14b的內周面抵接，第二壓力室214b與第三壓力室214c即被氣密地隔開。此外，增力活塞20的減震器36抵接於開關機構31的偵測銷66。再者，伴隨著活塞單元23的行程動作，偵測銷66抵抗彈性構件70的彈推力而被推出至末端側。如第3B圖所示，密封圈66e從縮徑部68b脫離而移動至擴徑部68a。隨之，密封圈66e從孔部68的內周面離開，而連通孔
78與連通孔80經由形成於偵測銷66之外周部的槽部66c而連通。結果，第一流路76的高壓氣體流入於第二流路82。
As shown in Fig. 6, when the piston unit 23 is displaced to the stroke end side, the booster piston 20 is pushed into the small diameter portion 14b. Furthermore, the second pressure chamber 214b and the third pressure chamber 214c are airtightly separated by the sealing ring 60 of the booster piston 20 elastically deforming and contacting the inner peripheral surface of the small diameter portion 14b. In addition, the shock absorber 36 of the booster piston 20 abuts against the detection pin 66 of the switch mechanism 31. Furthermore, along with the stroke action of the piston unit 23, the detection pin 66 resists the elastic thrust of the elastic member 70 and is pushed out to the end side. As shown in FIG. 3B, the seal ring 66e is separated from the reduced diameter portion 68b and moved to the enlarged diameter portion 68a. Along with this, the seal ring 66e separates from the inner peripheral surface of the hole 68, and the communicating hole
78 and the communication hole 80 communicate with each other through a groove portion 66 c formed on the outer periphery of the detection pin 66. As a result, the high-pressure gas in the first flow path 76 flows into the second flow path 82.
如第4B圖所示，當高壓氣體被供給至第二流路82時，受壓部92即因為第一空室86a與第二空室86b的壓力差而被推壓至滑動孔14側，而鎖固銷90的前端突出於滑動孔14內。鎖固銷90的前端部係卡合於中間構件18的卡合凹部50，阻止中間構件18的行程動作。藉此，中間構件18隔開增力活塞20側之第二壓力室214b及第三壓力室214c與作動活塞16側之第一壓力室214a及第四壓力室214d，而發揮作為間隔壁的功能。結果，流體壓力缸10係增力活塞20及作動活塞16串聯地動作，而與所謂串聯型的氣缸(air cylinder)同樣地作用。
As shown in Figure 4B, when high-pressure gas is supplied to the second flow path 82, the pressure receiving portion 92 is pushed to the sliding hole 14 side due to the pressure difference between the first cavity 86a and the second cavity 86b. The front end of the locking pin 90 protrudes from the sliding hole 14. The front end of the locking pin 90 is engaged with the engaging recess 50 of the intermediate member 18 to prevent the stroke movement of the intermediate member 18. Thereby, the intermediate member 18 separates the second pressure chamber 214b and the third pressure chamber 214c on the side of the booster piston 20 from the first pressure chamber 214a and the fourth pressure chamber 214d on the side of the actuating piston 16 and functions as a partition wall . As a result, the fluid pressure cylinder 10 is operated in series with the booster piston 20 and the actuating piston 16 and functions in the same way as a so-called air cylinder.
如圖中之箭頭符號所示，高壓氣體係通過鎖固銷90內的止回閥98，經由中間構件18之外周部與滑動孔14之內周面之間的間隙而流入於第三壓力室214c。結果，如第6圖所示，由於第三壓力室214c與第二壓力室214b之壓力差，箭頭符號所示之方向的驅動力會作用於增力活塞20。藉由作用於增力活塞20的驅動力，再加上作用於作動活塞16的驅動力，而使活塞桿22的推力倍增。另外，第四壓力室214d的氣體係透過桿內流路63而流動於第二壓力室214b，且經由末端側端口26排出。
As shown by the arrow in the figure, the high-pressure gas system flows into the third pressure chamber through the check valve 98 in the locking pin 90, through the gap between the outer circumference of the intermediate member 18 and the inner circumference of the sliding hole 14 214c. As a result, as shown in FIG. 6, due to the pressure difference between the third pressure chamber 214c and the second pressure chamber 214b, the driving force in the direction indicated by the arrow will act on the booster piston 20. By the driving force acting on the booster piston 20 and the driving force acting on the actuating piston 16, the thrust of the piston rod 22 is doubled. In addition, the gas system in the fourth pressure chamber 214d passes through the rod inner flow path 63 to flow into the second pressure chamber 214b, and is discharged through the terminal side port 26.
如第7圖所示，由增力活塞20所進行之推力的增加，係在直到增力活塞20之減震器36抵接於桿罩蓋32之行程末端為止之短範圍內發揮。增力活塞20之作動所需要之高壓氣體的量，係僅行程末端附近之第三壓力室214c的容積，可抑制高壓氣體的消耗量。
As shown in FIG. 7, the increase in thrust by the booster piston 20 is exerted in a short range until the shock absorber 36 of the booster piston 20 abuts the end of the stroke of the rod cover 32. The amount of high-pressure gas required for the actuation of the booster piston 20 is only the volume of the third pressure chamber 214c near the stroke end, which can suppress the consumption of high-pressure gas.
(復原步驟)
(Recovery steps)
如第8圖所示，在復原步驟中，係將驅動裝置120的切換閥110設為第二位置。頭端側端口24係經由切換閥110之第一端口110a及第四端口110d而與節流閥106相連，第一壓力室214a的高壓氣體係經由節流閥106而從排氣口108排出。此外，第一壓力室214a之高壓氣體的一部分，係經由止回閥105而供給至末端側端口26。
As shown in FIG. 8, in the restoration step, the switching valve 110 of the driving device 120 is set to the second position. The head end side port 24 is connected to the throttle valve 106 through the first port 110 a and the fourth port 110 d of the switching valve 110, and the high-pressure gas system of the first pressure chamber 214 a is discharged from the exhaust port 108 through the throttle valve 106. In addition, a part of the high-pressure gas in the first pressure chamber 214 a is supplied to the terminal side port 26 via the check valve 105.
如第9圖所示，在復原步驟中，高壓氣體係從末端側端口26流入於第二壓力室214b，並且經由第三流路83而流入於鎖固機構27的第二空室86b。此外，第二壓力室214b的高壓氣體係經由桿內流路63而亦流入於第四壓力室214d。
As shown in FIG. 9, in the restoration step, the high-pressure gas system flows into the second pressure chamber 214 b from the terminal side port 26, and flows into the second cavity 86 b of the lock mechanism 27 via the third flow path 83. In addition, the high-pressure gas system of the second pressure chamber 214b also flows into the fourth pressure chamber 214d via the rod inner flow path 63.
伴隨著經由第一流路76及頭端側端口24而進行的排氣，鎖固機構27之第二空室86b的壓力會與第一空室86a的壓力相等或較其更為增加。再者，藉由彈性構件102的彈推力與來自第二空室86b的壓力，鎖固銷90會上升，而使鎖固銷90的前端部退避至滑動孔14的外側。亦即，解除鎖固機構27對於中間構件18的鎖固。
Along with the exhaust through the first flow path 76 and the head end side port 24, the pressure of the second cavity 86b of the locking mechanism 27 is equal to or greater than the pressure of the first cavity 86a. Furthermore, due to the elastic thrust of the elastic member 102 and the pressure from the second cavity 86b, the locking pin 90 rises, and the front end of the locking pin 90 is retracted to the outside of the sliding hole 14. That is, the locking of the intermediate member 18 by the locking mechanism 27 is released.
由於第四壓力室214d與第一壓力室214a的壓力差，朝復原方向的驅動力會作用於作動活塞16。藉由此驅動力，活塞單元23朝復原方向移動。
Due to the pressure difference between the fourth pressure chamber 214d and the first pressure chamber 214a, the driving force in the return direction will act on the actuating piston 16. With this driving force, the piston unit 23 moves in the return direction.
如第10圖所示，當增力活塞20移動至滑動孔14的大徑部14a時，第三壓力室214c與第二壓力室214b即連通。結果，藉由彈推構件44的彈推力，中間構件18與增力活塞20抵接。由於第四壓力室214d與第一壓力室214a之壓力差所導致之朝復原方向的驅動力會作用於作動活塞16，活塞單元23復原為行程的始端位置。
As shown in Fig. 10, when the booster piston 20 moves to the large diameter portion 14a of the sliding hole 14, the third pressure chamber 214c and the second pressure chamber 214b are in communication. As a result, the intermediate member 18 abuts against the booster piston 20 by the elastic thrust of the elastic pushing member 44. The driving force in the return direction caused by the pressure difference between the fourth pressure chamber 214d and the first pressure chamber 214a will act on the actuating piston 16, and the piston unit 23 will return to the starting position of the stroke.
在以上的復原步驟中，流入於第二壓力室214b及第四壓力室214d的高壓氣體，係從頭端側端口24所排出之高壓氣體的一部分所供給。因此，不需要在復原步驟中從高壓氣體供給源104供給高壓氣體。
In the above restoration step, the high-pressure gas flowing into the second pressure chamber 214b and the fourth pressure chamber 214d is supplied by a part of the high-pressure gas discharged from the head end side port 24. Therefore, there is no need to supply high-pressure gas from the high-pressure gas supply source 104 in the restoration step.
本實施形態之流體壓力缸10係達成以下的功效。
The fluid pressure cylinder 10 of this embodiment achieves the following effects.
流體壓力缸10係具備鎖固機構27，該鎖固機構27係在作動活塞16及增力活塞20的行程中途將中間構件18固定於滑動孔14。依據此構成，在活塞桿22以外的場所亦可設置鎖固機構，因此裝置構成被簡化，動作的可靠性提升。
The fluid pressure cylinder 10 is provided with a locking mechanism 27 that fixes the intermediate member 18 to the sliding hole 14 in the middle of the strokes of the actuating piston 16 and the booster piston 20. According to this structure, the locking mechanism can also be provided in places other than the piston rod 22, so the device structure is simplified and the reliability of the operation is improved.
在流體壓力缸10中，鎖固機構27亦可設置在作動活塞16及增力活塞20之行程末端的附近。藉此，只要僅在行程後半供給增力用的氣體即可，因此可削減氣體消耗量。
In the fluid pressure cylinder 10, the locking mechanism 27 can also be arranged near the stroke end of the actuating piston 16 and the booster piston 20. Thereby, it is only necessary to supply the boosting gas only in the latter half of the stroke, so the gas consumption can be reduced.
在流體壓力缸10中，亦可設置高壓氣體供給源104(增力氣體供給機構)，該高壓氣體供給源104係在中間構件18被鎖固機構27鎖固時，將高壓氣體供給至中間構件18與增力活塞20之間的第三壓力室214c。藉此，裝置構成被簡化。
In the fluid pressure cylinder 10, a high-pressure gas supply source 104 (booster gas supply mechanism) may also be provided. The high-pressure gas supply source 104 supplies high-pressure gas to the intermediate member when the intermediate member 18 is locked by the locking mechanism 27. 18 and the third pressure chamber 214c between the booster piston 20. Thereby, the device structure is simplified.
在流體壓力缸10中，中間構件18亦可在與中間構件18的外周部及活塞桿22之間的滑動部具備密封圈48、52，將作動活塞16與中間構件18之間的第四壓力室214d與第三壓力室214c予以氣密地密封。藉此，可使增力活塞20產生推力。
In the fluid pressure cylinder 10, the intermediate member 18 may also be provided with seal rings 48 and 52 at the sliding portion between the outer circumference of the intermediate member 18 and the piston rod 22, so as to reduce the fourth pressure between the piston 16 and the intermediate member 18 The chamber 214d and the third pressure chamber 214c are hermetically sealed. In this way, the booster piston 20 can generate thrust.
在流體壓力缸10中，活塞桿22亦可具備連通增力活塞20之行程末端側之第二壓力室214b與第三壓力室214c的桿內流路63。藉
此，即使中間構件18被鎖固，亦可經由第二壓力室214b將第三壓力室214c的氣體排出。
In the fluid pressure cylinder 10, the piston rod 22 may also be provided with a rod inner flow path 63 that communicates the second pressure chamber 214b and the third pressure chamber 214c on the stroke end side of the booster piston 20. borrow
Therefore, even if the intermediate member 18 is locked, the gas in the third pressure chamber 214c can be discharged through the second pressure chamber 214b.
在流體壓力缸10中，亦可於第四壓力室214d設置將中間構件18朝增力活塞20側彈推的彈推構件44。藉此，即可確實地進行藉由鎖固機構27鎖固中間構件18。
In the fluid pressure cylinder 10, an elastic pushing member 44 for pushing the intermediate member 18 toward the booster piston 20 side may also be provided in the fourth pressure chamber 214d. In this way, the intermediate member 18 can be reliably locked by the locking mechanism 27.
在流體壓力缸10中，亦可設為滑動孔14具有大徑部14a及形成於末端側且具有較大徑部14a更小之內徑的小徑部14b，並且藉由使增力活塞20不會接觸大徑部14a的內周面，僅會接觸小徑部14b的內周面，而僅在小徑部14b中將第二壓力室214b與第三壓力室214c予以氣密地隔開。藉此，復原步驟中之第三壓力室214c之氣體的排出變得容易。
In the fluid pressure cylinder 10, the sliding hole 14 may have a large-diameter portion 14a and a small-diameter portion 14b formed on the tip side and having a smaller inner diameter of the larger-diameter portion 14a, and by making the booster piston 20 It does not touch the inner peripheral surface of the large-diameter portion 14a, only the inner peripheral surface of the small-diameter portion 14b, and only the small-diameter portion 14b separates the second pressure chamber 214b and the third pressure chamber 214c airtightly . Thereby, the discharge of the gas from the third pressure chamber 214c in the restoration step becomes easy.
在流體壓力缸10中，鎖固機構27係具備鎖固銷90，該鎖固銷90係突出於滑動孔14內而與中間構件18卡合。藉此，可將裝置構成簡單化。
In the fluid pressure cylinder 10, the locking mechanism 27 is provided with a locking pin 90 which protrudes into the sliding hole 14 and engages with the intermediate member 18. Thereby, the device configuration can be simplified.
在流體壓力缸10中，增力氣體供給機構亦可具備：氣體導入孔96，係形成於鎖固銷90的內部；及止回閥98，係設於氣體導入孔96。藉此，即可在鎖固銷90突出的時序，確實地將增力用的氣體供給至第三壓力室214c。
In the fluid pressure cylinder 10, the booster gas supply mechanism may also include: a gas introduction hole 96 formed inside the locking pin 90; and a check valve 98 that is provided at the gas introduction hole 96. Thereby, the gas for boosting can be reliably supplied to the third pressure chamber 214c at the timing when the locking pin 90 protrudes.
在流體壓力缸10中亦可具備開關機構31，該開關機構31係設於滑動孔14的末端側，且偵測由作動活塞16、中間構件18及增力活塞20所構成之活塞單元23的接近而令鎖固機構27動作。藉此，即可在適當的時間點令鎖固機構27動作。
The fluid pressure cylinder 10 may also be equipped with a switch mechanism 31, which is arranged on the end side of the sliding hole 14, and detects the power of the piston unit 23 composed of the actuating piston 16, the intermediate member 18 and the booster piston 20 The approach causes the locking mechanism 27 to operate. In this way, the locking mechanism 27 can be operated at an appropriate time.
缸裝置200亦可更具備連接於流體壓力缸10的第一壓力室214a及第二壓力室214b的驅動裝置120，驅動裝置120係具備切換閥110、高壓氣體供給源104、排氣口108及止回閥105，在切換閥110的第一位置，第一壓力室214a連通於高壓氣體供給源104，並且第二壓力室214b連通於排氣口108，在切換閥110的第二位置，第一壓力室214a經由止回閥105而連接於第二壓力室214b，並且第一壓力室214a連通於排氣口108。藉此，在復原步驟中，可將從第一壓力室214a所排出之高壓氣體的一部分供給至第二壓力室214b。結果，可在不從高壓氣體供給源104供給高壓氣體的狀況下進行復原動作。
The cylinder device 200 may further include a drive device 120 connected to the first pressure chamber 214a and the second pressure chamber 214b of the fluid pressure cylinder 10. The drive device 120 includes a switching valve 110, a high-pressure gas supply source 104, an exhaust port 108, and The check valve 105, in the first position of the switching valve 110, the first pressure chamber 214a is connected to the high-pressure gas supply source 104, and the second pressure chamber 214b is connected to the exhaust port 108, in the second position of the switching valve 110, the first A pressure chamber 214a is connected to the second pressure chamber 214b via the check valve 105, and the first pressure chamber 214a is connected to the exhaust port 108. Thereby, in the recovery step, a part of the high-pressure gas discharged from the first pressure chamber 214a can be supplied to the second pressure chamber 214b. As a result, the recovery operation can be performed without supplying high-pressure gas from the high-pressure gas supply source 104.
在上述的流體壓力缸10中，亦可於排氣口108與第一壓力室214a之間設置節流閥106。藉此，即可調整在復原步驟時要供給至第二壓力室214b之氣體的量。
In the aforementioned fluid pressure cylinder 10, a throttle valve 106 may also be provided between the exhaust port 108 and the first pressure chamber 214a. Thereby, the amount of gas to be supplied to the second pressure chamber 214b during the recovery step can be adjusted.
在上述中，雖已列舉出較佳實施型態說明了本發明，但本發明不限定於前述實施型態，在不脫離本發明之主旨的範圍內，當然可進行各種變更。亦即，在上述實施型態中，雖顯示了將流體壓力缸10之驅動裝置120配置於流體壓力缸10之外部之例，但本發明不限定於此。亦可將構成驅動裝置120之構件的一部分或全部內建於缸體12內。
In the foregoing, although preferred embodiments have been cited to describe the present invention, the present invention is not limited to the foregoing embodiments, and of course various modifications can be made without departing from the scope of the present invention. That is, in the foregoing embodiment, although an example is shown in which the driving device 120 of the fluid pressure cylinder 10 is arranged outside the fluid pressure cylinder 10, the present invention is not limited to this. Part or all of the components constituting the driving device 120 may also be built in the cylinder 12.
10‧‧‧流體壓力缸
10‧‧‧Fluid pressure cylinder
12‧‧‧缸體
12‧‧‧Cylinder
14‧‧‧滑動孔
14‧‧‧Sliding hole
14a‧‧‧大徑部
14a‧‧‧Dajing Department
14b‧‧‧小徑部
14b‧‧‧Small diameter
16‧‧‧作動活塞
16‧‧‧actuating piston
18‧‧‧中間構件
18‧‧‧Intermediate member
19‧‧‧防止脫落夾
19‧‧‧Preventing clip
20‧‧‧增力活塞
20‧‧‧Power Piston
22‧‧‧活塞桿
22‧‧‧Piston rod
23‧‧‧活塞單元
23‧‧‧Piston unit
24‧‧‧頭端側端口
24‧‧‧Head-end side port
24a‧‧‧開口部
24a‧‧‧Opening
26‧‧‧末端側端口
26‧‧‧End side port
27‧‧‧鎖固機構
27‧‧‧Locking mechanism
28‧‧‧頭端側本體部
28‧‧‧Head side body
28a‧‧‧頭端部
28a‧‧‧Head end
28b‧‧‧側壁
28b‧‧‧Sidewall
28c‧‧‧連接部
28c‧‧‧Connecting part
28d‧‧‧密封圈
28d‧‧‧Seal ring
30‧‧‧末端側本體部
30‧‧‧End side body
30a‧‧‧貫通孔
30a‧‧‧through hole
30b‧‧‧收容部
30b‧‧‧Containment Department
30c‧‧‧側壁
30c‧‧‧Wall
30d‧‧‧桿罩蓋裝設部
30d‧‧‧Rod cover installation part
30e‧‧‧卡止槽
30e‧‧‧Locking groove
30f、30g‧‧‧開口部
30f、30g‧‧‧Opening
31‧‧‧開關機構
31‧‧‧Switch mechanism
32‧‧‧桿罩蓋
32‧‧‧Rod cover
32a‧‧‧貫通孔
32a‧‧‧Through hole
32c‧‧‧第一環狀槽
32c‧‧‧First annular groove
32d‧‧‧第二環狀槽
32d‧‧‧Second ring groove
32e、32f、32g‧‧‧密封圈
32e, 32f, 32g‧‧‧Sealing ring
33‧‧‧桿密封圈
33‧‧‧Rod seal
34、36‧‧‧減震器
34、36‧‧‧Shock absorber
34a、36a‧‧‧減震器裝設槽
34a, 36a‧‧‧Shock absorber mounting groove
35‧‧‧活塞本體
35‧‧‧Piston body
35a、35b‧‧‧端面
35a, 35b‧‧‧end face
35c‧‧‧彈推構件裝設槽
35c‧‧‧Pushing member installation slot
38‧‧‧耐磨環
38‧‧‧Wear ring
38a‧‧‧耐磨環配置槽
38a‧‧‧Wear ring configuration groove
40‧‧‧磁鐵
40‧‧‧Magnet
40a‧‧‧磁鐵配置槽
40a‧‧‧Magnet configuration slot
42‧‧‧密封圈
42‧‧‧Seal
42a‧‧‧密封圈裝設槽
42a‧‧‧Sealing ring installation groove
44‧‧‧彈推構件
44‧‧‧Pushing member
46‧‧‧中間部本體
46‧‧‧Middle body
46a‧‧‧端面
46a‧‧‧end face
46c‧‧‧彈推構件裝設槽
46c‧‧‧Pushing member installation slot
46d‧‧‧貫穿孔
46d‧‧‧through hole
48‧‧‧密封圈
48‧‧‧Seal
48a‧‧‧密封圈裝設槽
48a‧‧‧Sealing ring installation groove
50‧‧‧卡合凹部
50‧‧‧Clamping recess
52‧‧‧密封圈
52‧‧‧Seal
52a‧‧‧密封圈裝設槽
52a‧‧‧Seal ring mounting groove
54‧‧‧耐磨環
54‧‧‧Wear ring
54a、56a‧‧‧耐磨環配置槽
54a, 56a‧‧‧Wear ring configuration groove
55‧‧‧缺口部
55‧‧‧Notch
56‧‧‧耐磨環
56‧‧‧Wear ring
56b‧‧‧增力氣體通路
56b‧‧‧Strengthening gas passage
58‧‧‧活塞本體
58‧‧‧Piston body
58b‧‧‧端面
58b‧‧‧end face
59‧‧‧密封圈
59‧‧‧Seal ring
60‧‧‧密封圈
60‧‧‧Seal ring
60a‧‧‧密封圈裝設槽
60a‧‧‧Sealing ring installation groove
62‧‧‧第一桿
62‧‧‧First shot
63‧‧‧桿內流路
63‧‧‧In-rod flow path
64‧‧‧第二桿
64‧‧‧Second shot
66‧‧‧偵測銷
66‧‧‧Detection pin
68‧‧‧孔部
68‧‧‧Kongbu
70‧‧‧彈性構件
70‧‧‧Elastic member
71‧‧‧蓋構件
71‧‧‧Cover member
76‧‧‧第一流路
76‧‧‧First Stream
78、80‧‧‧連通孔
78、80‧‧‧Connecting hole
82‧‧‧第二流路
82‧‧‧Second Stream
83‧‧‧第三流路
83‧‧‧Third Stream
84‧‧‧罩蓋構件
84‧‧‧Cover member
84a‧‧‧卡止具
84a‧‧‧Locking device
90‧‧‧鎖固銷
90‧‧‧Locking pin
98‧‧‧止回閥
98‧‧‧Check valve
214a‧‧‧第一壓力室
214a‧‧‧First pressure chamber
214b‧‧‧第二壓力室
214b‧‧‧Second pressure chamber
214c‧‧‧第三壓力室
214c‧‧‧The third pressure chamber
214d‧‧‧第四壓力室
214d‧‧‧The fourth pressure chamber
