JPH0743452Y2 - Fluid pressure cylinder - Google Patents
Fluid pressure cylinderInfo
- Publication number
- JPH0743452Y2 JPH0743452Y2 JP1990021691U JP2169190U JPH0743452Y2 JP H0743452 Y2 JPH0743452 Y2 JP H0743452Y2 JP 1990021691 U JP1990021691 U JP 1990021691U JP 2169190 U JP2169190 U JP 2169190U JP H0743452 Y2 JPH0743452 Y2 JP H0743452Y2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- packing
- fitted
- fluid pressure
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Actuator (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は、シリンダチユーブ内にパツキンを外周に嵌着
したピストンを流体圧による往復運動自由に嵌装し、そ
のピストンに突設した係合部に被駆動部材をピストンの
軸線方向と略直角方向に荷重が作用する状態で係合する
ようにした流体圧シリンダにおいて、ピストン外周の気
密性が良好に保てるように、パツキン嵌着部分に改良を
加えた流体圧シリンダに関する。DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention has a piston in which a packing is fitted on the outer periphery of a cylinder tube, and the piston is fitted reciprocally by fluid pressure. In a fluid pressure cylinder in which a driven member is engaged in a state in which a load is applied in a direction substantially perpendicular to the axial direction of the piston, improvements have been made to the packing part where the piston outer periphery is kept airtight. Fluid pressure cylinder.
従来の技術及び考案が解決しようとする課題 この種の流体圧シリンダの一例であるロツドレスシリン
ダの構造を第４図を参照して説明する。このロツドレス
シリンダ１は、上面に長さ方向の切割溝３を形成し、両
端をカバー４で閉塞したシリンダチユーブ２の長円形断
面の内周面５に、両端部の外周に周設した嵌着溝８にパ
ツキン９を嵌着した同じく長円形断面のピストン７が摺
動自由に嵌装され、そのピストン７の上面中央部に突設
した連結部10が切割溝３を通して外部に突出してその突
出部11にテーブル12が固定され、ピストン７の両側の部
屋に夫々のポート13から加圧エアーの供給と排出とを交
互に繰り返してピストン７を往復運動させることによ
り、切割溝３の内面側を閉塞したシールベルト15をピス
トン７内に、また、外面側を閉塞した防塵ベルト16を突
出部11内に夫々挿通させつつ、テーブル12並びにその上
面に載置したワーク等の図示しない被駆動部材を切割溝
３に沿つて往復運動させるようになつている。Problems to be Solved by Conventional Technology and Invention A structure of a rodless cylinder, which is an example of this type of fluid pressure cylinder, will be described with reference to FIG. The rodless cylinder 1 has a slit 3 formed in the lengthwise direction on the upper surface thereof, and an inner peripheral surface 5 of an oval cross section of a cylinder tube 2 having both ends closed by covers 4 fitted around the outer periphery of both ends. A piston 7 having an oval cross section, in which a packing 9 is fitted in the fitting groove 8, is slidably fitted therein, and a connecting portion 10 projecting from the central portion of the upper surface of the piston 7 protrudes through the slit groove 3 to the outside. The table 12 is fixed to the protruding portion 11, and the supply and discharge of the pressurized air from the respective ports 13 are alternately repeated in the chambers on both sides of the piston 7 to reciprocate the piston 7 to reciprocate the inner surface of the slit groove 3. While the seal belt 15 that closes the inside of the piston 7 is inserted into the piston 7, and the dust-proof belt 16 that closes the outer surface side is inserted into the inside of the protrusion 11, the driven member (not shown) such as the table 12 and the work placed on the upper surface thereof is inserted. Along the split groove 3 It is designed to reciprocate.
ところで、このようなロツドレスシリンダ１は、テーブ
ル12の上に被駆動部材を載せて用いるのであるから、同
図の矢線に示すように、ピストン７に対して下向きに荷
重が作用するのであり、通常このピストン７はシリンダ
チユーブ２の内周面５との間にクリアランスを持つて嵌
合されて既述のパツキン９によつて気密を保つようにな
つているのであるが、従来は、ピストン７の両端部に直
に嵌着溝８を周設してそこにパツキン９を嵌着した構造
となつていたため、ピストン７に上記した下向きの荷重
が作用すると、下面側のパツキン９を潰しつつピストン
７が沈むことにより、上面側のパツキン９とシリンダチ
ユーブ２の内周面５の間の締め代が小さくなつて、場合
によつては気密が保てなくなるおそれがある。これを避
けるには、ピストン７が沈むのを見越して予めパツキン
９の締め代を大きく取れば良いのであるが、そのように
するとピストン７の摺動抵抗が増し、特に始動時におい
て高いエアー圧が必要となる欠点があつた。By the way, since such a rodless cylinder 1 is used by mounting the driven member on the table 12, the load acts downward on the piston 7 as shown by the arrow in the figure. Usually, the piston 7 is fitted with a clearance with the inner peripheral surface 5 of the cylinder tube 2 and is kept airtight by the packing 9 described above. Since the fitting groove 8 is directly provided around both end portions of 7 and the packing 9 is fitted therein, when the downward load is applied to the piston 7, the packing 9 on the lower surface side is crushed while being crushed. When the piston 7 sinks, the tightening margin between the packing 9 on the upper surface side and the inner peripheral surface 5 of the cylinder tube 2 becomes small, and in some cases, airtightness may not be maintained. In order to avoid this, a large tightening allowance of the packing 9 may be taken in advance in anticipation of the piston 7 sinking, but doing so increases the sliding resistance of the piston 7 and increases the air pressure especially at the start. There was a necessary defect.
課題を解決するための手段 上記の課題を解決するための手段として、本考案の流体
圧シリンダは、シリンダチユーブ内に、パツキンを外周
に嵌着したピストンを流体圧による往復運動自由に嵌装
し、そのピストンに突設した係合部に、被駆動部材をピ
ストンの軸線方向と略直角方向に荷重が作用する態様で
係合するようにした流体圧シリンダにおいて、ピストン
を、シリンダチユーブにほぼ緊密に嵌合して係合部を突
設した本体部と、パツキンを嵌着したパツキン嵌着部と
に分け、そのパツキン嵌着部と本体部とを、荷重の作用
方向の相対的移動可能に連結した構成とした。Means for Solving the Problems As a means for solving the above problems, in a fluid pressure cylinder of the present invention, a piston in which a packing is fitted on the outer circumference is freely fitted in a fluid reciprocating motion in a cylinder tube. , In a fluid pressure cylinder in which a driven member is engaged with an engaging portion projecting from the piston in a manner in which a load acts in a direction substantially perpendicular to the axial direction of the piston, the piston is substantially close to the cylinder tube. It is divided into a main body part that is fitted with the engaging part and a protruding part is provided, and a packing part that is fitted with a packing, and the packing part and the main part are relatively movable in the load acting direction. The configuration is linked.
考案の作用及び効果 本考案は上記構成になり、被駆動部材の荷重がピストン
の軸線方向と略直角方向に作用すると、係合部を突設し
た本体部はシリンダチユーブ内において荷重の作用方向
に移動するが、パツキン嵌着部は、本体部に対して、そ
の荷重の作用方向に相対的に移動して、本体部の移動に
も拘わらず元位置であるシリンダチユーブの中心にその
まま留まる。The operation and effect of the present invention With the above configuration, when the load of the driven member acts in a direction substantially perpendicular to the axial direction of the piston, the main body with the engaging portion projecting in the direction of the load acts in the cylinder tube. Although it moves, the packing fit-in portion moves relative to the main body portion in the acting direction of the load, and stays at the center of the cylinder tube which is the original position in spite of the movement of the main body portion.
このように、パツキン嵌着部が元位置に留まることによ
り、そこに嵌着されたパツキンの締め代は全周において
不変に維持され、ピストン外周の気密性を全周にわたつ
て確実に保つことができる。また、パツキンの締め代は
気密を保つに足る必要最小限だけを取れば良いから、ピ
ストンの摺動抵抗を小さく抑えることができ、ピストン
の始動に際して低圧でもスムーズに駆動することができ
る効果がある。In this way, by keeping the packing part in the original position, the tightening margin of the packing fitted there is maintained unchanged over the entire circumference, and the airtightness of the piston outer circumference is reliably maintained over the entire circumference. You can Further, the tightening margin of the packing is only required to be airtight, so that the sliding resistance of the piston can be suppressed to be small and the piston can be driven smoothly even at low pressure. .
実施例 以下、本考案をロツドレスシリンダに適用した一実施例
を第１図乃至第３図に基づいて説明する。Embodiment An embodiment in which the present invention is applied to a rodless cylinder will be described below with reference to FIGS. 1 to 3.
本実施例では、従来技術の項で説明したロツドレスシリ
ンダ１において、ピストン21が、前記した連結部10を突
設した本体部22と、パツキン９を嵌着するための前後２
つのパツキン嵌着部23とに分けて別体に形成されてい
る。各パツキン嵌着部23は、外側の端部外周に鍔部24が
形成されているとともに、内側の端面に、先端に掛止用
頭部26を形成した連結板25が水平姿勢で突設されてい
る。一方、本体部22の前後両端面には、上記の連結板25
の板幅に略一致する横幅を有するとともに、板厚よりも
大きい縦幅を有する案内孔28が開口され、案内孔28の奥
側にその連結板25の頭部26を収容する収容孔29が連成さ
れている。各パツキン嵌着部23は、掛止用頭部26を収容
孔29内に収容しつつ連結板25を案内孔28に挿通すること
により、本体部22に対して、軸線方向の抜け不能に、か
つ、上下方向の相対的移動自由に連結されており、本体
部22の前後の端面と、これと連結されたパツキン嵌着部
23の鍔部24との間に周方向の嵌着溝30が構成されて、そ
の嵌着溝30内にパツキン９が嵌められている。In the present embodiment, in the rodless cylinder 1 described in the section of the prior art, the piston 21 is fitted with the body portion 22 protruding from the connecting portion 10 and the front and rear portions 2 for fitting the packing 9 together.
It is formed separately from the two packing fit-in portions 23. Each packing fit-in portion 23 has a flange portion 24 formed on the outer periphery of the outer end portion, and a connecting plate 25 having a hooking head portion 26 formed on the inner end surface thereof in a horizontal posture. ing. On the other hand, the connecting plate 25
A guide hole 28 having a horizontal width substantially equal to the plate width of the connecting hole 25 and having a vertical width larger than the plate thickness is formed, and an accommodation hole 29 for accommodating the head 26 of the connecting plate 25 is provided on the inner side of the guide hole 28. It is coupled. Each packing member 23, by inserting the connecting plate 25 into the guide hole 28 while accommodating the locking head 26 in the accommodating hole 29, with respect to the main body 22, immovable in the axial direction, In addition, the front and rear end surfaces of the main body 22 are connected to each other so as to be movable relative to each other in the vertical direction, and the packing fitting portion connected to the end surfaces.
A fitting groove 30 in the circumferential direction is formed between the fitting groove 30 and the flange portion 24 of 23, and the packing 9 is fitted in the fitting groove 30.
本実施例はこのような構造になり、テーブル12にワーク
等の被駆動部材を載せると、その荷重が下向き作用し、
そのテーブル12を取り付けたピストン21の本体部22は、
第２図に示すように、下面がシリンダチユーブ１の内周
面５に当たるまで、距離ｈだけ下方に沈むのであるが、
パツキン嵌着部23の連結板25が本体部22の案内孔28内を
相対的に上動して、パツキン嵌着部23は本体部22の下動
に拘わらずシリンダチユーブ２の中心に一致した元の位
置にそのまま留まる。そして、ピストン21の両側の部屋
に交互に加圧エアーを作用させれば、本体部22と両パツ
キン嵌着部23とが一体となつて軸線方向に往復運動す
る。This embodiment has such a structure, and when a driven member such as a work is placed on the table 12, the load acts downward,
The main body 22 of the piston 21 to which the table 12 is attached is
As shown in FIG. 2, the lower surface sinks downward by a distance h until it abuts the inner peripheral surface 5 of the cylinder tube 1.
The connecting plate 25 of the packing fit-in portion 23 relatively moves upward in the guide hole 28 of the body portion 22, and the packing fit-in portion 23 is aligned with the center of the cylinder tube 2 regardless of the downward movement of the body portion 22. It stays in its original position. Then, when the pressurized air is alternately applied to the chambers on both sides of the piston 21, the main body portion 22 and the both packing fitting portions 23 are integrally reciprocated in the axial direction.
このように、ピストン21に対して下向きの荷重が作用し
ても、本体部22が沈むだけで、パツキン嵌着部23はその
まま元位置に留まり、嵌着溝30に嵌められたパツキン９
の締め代は何ら変わることがないのであつて、ピストン
21の両端部外周の気密性が全周にわたつて確保される。
また、このようにパツキン嵌着部23が定位置に維持され
ることにより、その沈みを見越してパツキン９に余分の
締め代を取る必要がないから、ピストン21の摺動抵抗を
小さく抑えることができ、ピストン21の始動に際して、
比較的低いエアー圧でもこれをスムーズに駆動すること
ができる。In this way, even if a downward load is applied to the piston 21, the body portion 22 is only sunk, and the packing member 23 remains in its original position, and the packing member 9 fitted in the fitting groove 30 is kept.
Since the tightening margin of the piston does not change at all, the piston
The airtightness of the outer circumference of both ends of 21 is secured over the entire circumference.
Further, since the packing part 23 is maintained at the fixed position in this manner, it is not necessary to provide an extra tightening allowance for the packing 9 in anticipation of its sinking, so that the sliding resistance of the piston 21 can be suppressed to be small. Yes, when starting the piston 21,
It can be driven smoothly even with relatively low air pressure.
なお、本考案は、上記実施例のロツドレスシリンダ１に
限らず、例えば、通常のロツド式のシリンダであつて、
水平方向に突出したピストンロツドの先端に被駆動部材
を浮動状態で取り付けて使用するもの等、他の形式のシ
リンダであつて、被駆動部材によりピストンがその軸線
方向と略直角方向に荷重を受けるもの全般について、ピ
ストンの本体部とパツキン嵌着部の連結部分の構造を適
宜に変更することによつて広く適用することが可能であ
り、また、エアー式シリンダのみならず、油圧式シリン
ダにも同様に適用可能である。The present invention is not limited to the rodless cylinder 1 of the above-described embodiment, but may be, for example, an ordinary rod type cylinder,
Other types of cylinders, such as those in which a driven member is attached to the tip of a horizontally projecting piston rod in a floating state, and in which the piston is loaded by the driven member in a direction substantially perpendicular to its axial direction Overall, it can be widely applied by appropriately changing the structure of the connecting part of the piston body and the packing part, and it is applicable not only to pneumatic cylinders but also to hydraulic cylinders. Is applicable to.
第１図は本考案の一実施例の部分縦断面図、第２図はそ
の荷重作用時の状態を示す部分縦断面図、第３図はその
分解斜視図であり、第４図は従来例の一部切欠縦断面図
である。 1:ロツドレスシリンダ、2:シリンダチユーブ、3:切割
溝、9:パツキン、10:連結部、12:テーブル、21:ピスト
ン、22:本体部、23:パツキン嵌着部、25:連結板、26:掛
止用頭部、28:案内孔、29:収容孔、30:嵌着溝FIG. 1 is a partial vertical cross-sectional view of an embodiment of the present invention, FIG. 2 is a partial vertical cross-sectional view showing a state when a load is applied, FIG. 3 is an exploded perspective view thereof, and FIG. 4 is a conventional example. FIG. 3 is a partially cutaway vertical sectional view of FIG. 1: Rotless cylinder, 2: Cylinder tube, 3: Cutting groove, 9: Packing, 10: Connecting part, 12: Table, 21: Piston, 22: Main body, 23: Packing fitting part, 25: Connecting plate, 26: Hook head, 28: Guide hole, 29: Housing hole, 30: Fitting groove
Claims (1)
嵌着したピストンを流体圧による往復運動自由に嵌装
し、該ピストンに突設した係合部に、被駆動部材を該ピ
ストンの軸線方向と略直角方向に荷重が作用する態様で
係合するようにした流体圧シリンダにおいて、前記ピス
トンを、前記シリンダチユーブにほぼ緊密に嵌合して前
記係合部を突設した本体部と、前記パツキンを嵌着した
パツキン嵌着部とに分け、該パツキン嵌着部と前記本体
部とを、前記荷重の作用方向の相対的移動可能に連結し
たことを特徴とする流体圧シリンダ1. A piston having a packing fitted on its outer periphery is fitted in a cylinder tube so as to freely reciprocate by a fluid pressure, and a driven member is provided in an engaging portion projecting from the piston in an axial direction of the piston. In a fluid pressure cylinder adapted to be engaged in a manner in which a load acts in a direction substantially perpendicular to, a main body portion in which the piston is fitted substantially tightly to the cylinder tube and the engaging portion is provided in a protruding manner, A fluid pressure cylinder characterized in that the packing is fitted into a packing fitting portion, and the packing fitting portion and the main body portion are connected so as to be relatively movable in the acting direction of the load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990021691U JPH0743452Y2 (en) | 1990-03-02 | 1990-03-02 | Fluid pressure cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990021691U JPH0743452Y2 (en) | 1990-03-02 | 1990-03-02 | Fluid pressure cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03112102U JPH03112102U (en) | 1991-11-15 |
| JPH0743452Y2 true JPH0743452Y2 (en) | 1995-10-09 |
Family
ID=31524726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990021691U Expired - Lifetime JPH0743452Y2 (en) | 1990-03-02 | 1990-03-02 | Fluid pressure cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0743452Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0113790B1 (en) * | 1983-01-14 | 1987-03-11 | PROMA Produkt- und Marketing Gesellschaft m.b.H. | Pressure cylinder with a longitudinally slotted barrel closed at both ends |
-
1990
- 1990-03-02 JP JP1990021691U patent/JPH0743452Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03112102U (en) | 1991-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |