JP2009178802A - Clamping device - Google Patents

Clamping device Download PDF

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Publication number
JP2009178802A
JP2009178802A JP2008020020A JP2008020020A JP2009178802A JP 2009178802 A JP2009178802 A JP 2009178802A JP 2008020020 A JP2008020020 A JP 2008020020A JP 2008020020 A JP2008020020 A JP 2008020020A JP 2009178802 A JP2009178802 A JP 2009178802A
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Prior art keywords
valve
hole
supply
valve body
cylinder chamber
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Japanese (ja)
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Shuhei Tanaka
修平 田中
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Howa Machinery Ltd
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Howa Machinery Ltd
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Priority to JP2008020020A priority Critical patent/JP2009178802A/en
Publication of JP2009178802A publication Critical patent/JP2009178802A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
    • F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
    • F15B15/063—Actuator having both linear and rotary output, i.e. dual action actuator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive
    • B25B5/062—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis parallel to the pressing direction

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Jigs For Machine Tools (AREA)
  • Lift Valve (AREA)
  • Actuator (AREA)
  • Clamps And Clips (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamp device in which there is no need to confirm the size of a clearance between a valve hole and a valve element by respective clamp devices and a replacement part is inexpensive. <P>SOLUTION: The valve hole 32 is provided on a valve member 29 attached to a valve attachment hole 26 communicated with a midway of a feeding/discharge passage 22 provided on a cylinder body 2. When an adjustment valve part 44 of the valve element 31 movably attached to the valve element attachment hole 30 of the valve member 29 is inserted to the valve hole 32, a clearance S for adjusting a flow rate of a pressurization fluid is provided. Thereby, the size of the clearance S by the valve hole 32 and the adjustment valve part 44 can be confirmed even if the valve member 29 is not attached to the cylinder body 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、クランプ装置に関する。   The present invention relates to a clamping device.

従来、シリンダ本体に設けたシリンダ室にピストンを軸方向移動可能に嵌装し、そのピストンに連結したピストンロッドをシリンダ本体の一端部から突出させ、シリンダ本体の給排路から一方のシリンダ室に圧流体を供給すると共に他方のシリンダ室から圧流体を排出することでピストンを移動させ、ピストンロッドに設けたクランパがワークに対してクランプ、アンクランプするようにしたクランプ装置は多数提案されている。
ところで、上記クランプ装置を複数設置した治具を用いて大きなワーク等をクランプする場合には、圧流体の供給源から各クランプ装置までの距離が異なることで、一定時間における各クランプ装置に供給される圧流体の供給流量が異なり各クランプ装置によるクランプのタイミングにばらつきが生じる。そのため、ワークを加工するまでの時間が長くなったり、クランプしていない箇所に外力が加わった時にワークがずれる等の問題があるので、一定時間における各クランプ装置でシリンダ室に供給する圧流体の供給流量を調整しなければならない。また、治具を小型化とするためにはクランプ装置も小型化とする必要があった。 Conventionally, a piston is fitted in a cylinder chamber provided in the cylinder body so as to be movable in the axial direction, and a piston rod connected to the piston is protruded from one end of the cylinder body, and is then supplied from the supply / discharge passage of the cylinder body to one cylinder chamber. Many clamping devices have been proposed in which a piston is moved by supplying pressurized fluid and discharging the pressurized fluid from the other cylinder chamber, and a clamper provided on the piston rod clamps and unclamps the workpiece. .
By the way, when clamping a large workpiece or the like using a jig having a plurality of the clamping devices, the distance from the pressurized fluid supply source to each clamping device is different, so that it is supplied to each clamping device for a certain time. The supply flow rate of the pressurized fluid differs, and the clamping timing of each clamping device varies. For this reason, there is a problem that the time until the workpiece is processed becomes long or the workpiece is displaced when an external force is applied to an unclamped location. The supply flow must be adjusted. Further, in order to reduce the size of the jig, it is necessary to reduce the size of the clamp device.

そこで、特許文献１のクランプ装置のように、クランプ本体内に設けた油圧シリンダの油室に接続された油路に流量調整弁を備え、流量調整弁により油圧の流量を調整するものが知られている。その流量調整弁は、クランプ本体の装着穴に螺着された筒状の弁ケースに弁部材が前後移動可能に装着され、その弁部材の弁体部を油路の途中部に形成され前記装着穴の前端に連なる弁孔に前後摺動自在に挿入して構成されている。よって、弁部材を前後に移動させると、弁部材の弁体部と弁孔との間の隙間の大きさが変化してその間を流れる油圧の流量が調整されるようになっている。また、弁部材には弁体部と弁孔との隙間をバイパスするバイパス流路と、バイパス流路を油室に油圧を供給する方向にのみ閉止する逆止弁が備えられている。
特開２００４−３６０７１８号公報 Therefore, as in the clamp device of Patent Document 1, there is known a device that includes a flow rate adjusting valve in an oil passage connected to an oil chamber of a hydraulic cylinder provided in the clamp body, and adjusts the hydraulic flow rate by the flow rate adjusting valve. ing. The flow regulating valve is mounted on a cylindrical valve case screwed into a mounting hole of the clamp body so that the valve member can be moved back and forth, and the valve body of the valve member is formed in the middle of the oil passage. It is configured to be slidably inserted back and forth into a valve hole connected to the front end of the hole. Therefore, when the valve member is moved back and forth, the size of the gap between the valve body portion of the valve member and the valve hole is changed, and the flow rate of the hydraulic pressure flowing therebetween is adjusted. Further, the valve member is provided with a bypass flow path that bypasses the gap between the valve body portion and the valve hole, and a check valve that closes the bypass flow path only in the direction of supplying hydraulic pressure to the oil chamber.
Japanese Patent Laid-Open No. 2004-360718

上記のクランプ装置に備えた流量調整弁は、油路の途中部に形成した弁孔に弁ケースに装着した弁部材の弁体部を挿入し、弁体部と弁孔との間に隙間を形成するものである。また、弁部材には逆止弁が備えられている。従って、クランプ本体の装着穴に螺着された弁ケースに弁部材を装着した時に、目視出来ないクランプ本体内の弁孔に弁体部を挿入させるので、弁部材の組付けに時間がかかるおそれがあった。また、弁体部と弁孔の加工精度によって隙間の大きさが異なるので、各クランプ装置で隙間の大きさを確認しなければならない煩わしさがあった。また、弁部材の内部に逆止弁を備えるために、弁部材の鋼球収容孔に鋼球とばね部材を挿入した後、弁部材の弁体部をかしめることで、前記鋼球やばね部材の交換時には弁部材全体を交換する必要があり、交換部品が高価なクランプ装置となるおそれがあった。また、メンテナンス時に、弁部材を後方に移動させ過ぎた状態で油室から油圧を排出したり清掃等を行っていると、弁ケースから弁部材が脱落して紛失するおそれがあった。
そこで本発明の課題は、上記問題点に鑑み、弁孔と弁体との間の隙間の大きさを各クランプ装置で確認する必要がなく、交換部品が安価なクランプ装置を提供することを目的とする。 The flow rate adjusting valve provided in the clamping device described above inserts the valve body part of the valve member attached to the valve case into the valve hole formed in the middle part of the oil passage, and creates a gap between the valve body part and the valve hole. To form. The valve member is provided with a check valve. Therefore, when the valve member is mounted in the valve case screwed into the mounting hole of the clamp body, the valve body portion is inserted into the valve hole in the clamp body that cannot be seen, so that it may take time to assemble the valve member. was there. Moreover, since the size of the gap differs depending on the processing accuracy of the valve body portion and the valve hole, there is an inconvenience that the size of the gap must be confirmed by each clamping device. Further, in order to provide a check valve inside the valve member, after inserting the steel ball and the spring member into the steel ball housing hole of the valve member, the valve body portion of the valve member is caulked to thereby When replacing the member, it is necessary to replace the entire valve member, and the replacement part may be an expensive clamping device. Further, if the hydraulic pressure is discharged from the oil chamber or cleaning is performed with the valve member moved too far during maintenance, the valve member may fall off the valve case and be lost.
In view of the above problems, an object of the present invention is to provide a clamping device in which there is no need to check the size of the gap between the valve hole and the valve body with each clamping device, and the replacement parts are inexpensive. And

本発明は、シリンダ本体に設けたシリンダ室にピストンを軸方向移動可能に嵌装し、そのピストンに連結したピストンロッドをシリンダ本体の一端部から突出させ、シリンダ本体の給排路から一方のシリンダ室に圧流体を供給すると共に他方のシリンダ室から圧流体を排出することでピストンを移動させ、ピストンロッドに設けたクランパがワークに対してクランプ、アンクランプするようにしたクランプ装置において、シリンダ本体の外側面から給排路の途中に連通する弁装着穴を設け、その弁装着穴に給排路を流れる圧流体の流量を調整可能な流量調整弁を装着し、その流量調整弁は、シリンダ本体の弁装着穴に装着され、外側の給排路をシリンダ室側の給排路に連通させる弁孔と外側面から弁孔に向けて設けた弁体装着孔を有する弁部材を備えると共に、弁部材の弁体装着孔に弁孔に向けて移動可能に装着され、弁孔との間の隙間の大きさを調整可能な調整弁部と、シリンダ室側の給排路を外側の給排路に連通させる逆止弁孔を有し、逆止弁孔の途中にシリンダ室側への流れを逆止し外側への流れを許す逆止弁体を内蔵している弁体を備え、給排路に供給した圧流体を弁孔と調整弁部の間の隙間に通過させてシリンダ室に供給し、シリンダ室から排出される圧流体を前記隙間と逆止弁孔に通過させて給排路から排出するようにしたことを特徴とする。   According to the present invention, a piston is fitted in a cylinder chamber provided in a cylinder body so as to be movable in the axial direction, a piston rod connected to the piston is protruded from one end of the cylinder body, and one cylinder is inserted from a supply / discharge passage of the cylinder body. In a clamping device in which a piston is moved by supplying pressurized fluid to the chamber and discharging the pressurized fluid from the other cylinder chamber, and a clamper provided on the piston rod clamps and unclamps the workpiece. A valve mounting hole that communicates from the outside surface to the middle of the supply / discharge path is provided, and a flow rate adjustment valve that can adjust the flow rate of the pressurized fluid that flows through the supply / discharge path is installed in the valve mounting hole. A valve portion that is mounted in the valve mounting hole of the main body and has a valve hole that connects the outer supply / discharge passage to the supply / discharge passage on the cylinder chamber side and a valve body mounting hole provided from the outer surface toward the valve hole An adjustment valve portion that is movably mounted in the valve body mounting hole of the valve member toward the valve hole, and that can adjust the size of the gap between the valve hole and a supply / discharge path on the cylinder chamber side A valve body that has a check valve hole that communicates with the outer supply / discharge passage, and that incorporates a check valve body that prevents the flow to the cylinder chamber and allows the flow to the outside in the middle of the check valve hole The pressure fluid supplied to the supply / discharge passage is supplied to the cylinder chamber through the gap between the valve hole and the adjustment valve portion, and the pressure fluid discharged from the cylinder chamber is passed to the gap and the check valve hole. It is made to discharge from a supply / discharge path.

また、本発明は、弁体装着孔に装着した弁体の調整弁部を弁孔に貫通させ、調整弁部の先端に弁部材に係合可能な抜け止め部材を備えて成ることを特徴とする。更に、本発明は、弁体を、弁部材の弁体装着孔に螺合された装着部材と弁部材の弁体装着孔に嵌挿された弁体部材とで構成し、弁体部材に軸線方向へ貫通する貫通孔を設け、その貫通孔のシリンダ室側部分を小径の逆止弁孔に、外側部分を大径の収納孔に夫々形成し、装着部材と逆止弁体の間に逆止ばねを介在させて成ることを特徴とする。   Further, the present invention is characterized in that the adjustment valve portion of the valve body mounted in the valve body mounting hole is penetrated through the valve hole, and a retaining member that can be engaged with the valve member is provided at the tip of the adjustment valve portion. To do. Further, according to the present invention, the valve body is composed of a mounting member screwed into the valve body mounting hole of the valve member and a valve body member inserted into the valve body mounting hole of the valve member, and the valve body member has an axis line. A through-hole that penetrates in the direction is provided, the cylinder chamber side portion of the through-hole is formed as a small-diameter check valve hole, and the outer portion is formed as a large-diameter storage hole. It is characterized by interposing a stop spring.

本発明では、シリンダ本体の外側面から給排路の途中に連通する弁装着穴を設け、その弁装着穴に給排路を流れる圧流体の流量を調整可能な流量調整弁を装着し、その流量調整弁は、シリンダ本体の弁装着穴に装着され、外側の給排路をシリンダ室側の給排路に連通させる弁孔と外側面から弁孔に向けて設けた弁体装着孔を有する弁部材を備えると共に、弁部材の弁体装着孔に弁孔に向けて移動可能に装着され、弁孔との間の隙間の大きさを調整可能な調整弁部と、シリンダ室側の給排路を外側の給排路に連通させる逆止弁孔を有し、逆止弁孔の途中にシリンダ室側への流れを逆止し外側への流れを許す逆止弁体を内蔵している弁体を備え、給排路に供給した圧流体を弁孔と調整弁部の間の隙間に通過させてシリンダ室に供給し、シリンダ室から排出される圧流体を前記隙間と逆止弁孔に通過させて給排路から排出するようにしたことで、シリンダ本体に装着する弁部材に設けた弁孔に弁体の調整弁部を挿入させると圧流体の流量を調整する隙間が設けられることで、シリンダ本体に弁部材を装着しなくても弁孔と調整弁部による隙間の大きさを確認することが可能となり、各クランプ装置で前記隙間の大きさが統一されることとなる。   In the present invention, a valve mounting hole communicating from the outer surface of the cylinder body to the middle of the supply / discharge path is provided, and a flow rate adjusting valve capable of adjusting the flow rate of the pressurized fluid flowing through the supply / discharge path is mounted in the valve mounting hole, The flow rate adjusting valve is mounted in the valve mounting hole of the cylinder body, and has a valve hole for connecting the outer supply / discharge path to the supply / discharge path on the cylinder chamber side and a valve body mounting hole provided from the outer surface toward the valve hole. A valve member, a valve body mounting hole of the valve member that is movably mounted toward the valve hole, and that can adjust the size of the gap between the valve hole and a cylinder chamber side supply / discharge It has a check valve hole that allows the passage to communicate with the outer supply / discharge passage, and a check valve body that prevents the flow to the cylinder chamber side and allows the flow to the outside in the middle of the check valve hole. A valve body is provided, and the pressurized fluid supplied to the supply / exhaust passage is passed through the gap between the valve hole and the adjustment valve portion to be supplied to the cylinder chamber. The pressure fluid discharged from the valve passes through the gap and the check valve hole and is discharged from the supply / discharge passage, so that the adjustment valve portion of the valve body is provided in the valve hole provided in the valve member attached to the cylinder body. When inserted, a gap for adjusting the flow rate of the pressurized fluid is provided, so that it is possible to check the size of the gap between the valve hole and the adjustment valve portion without attaching a valve member to the cylinder body. Thus, the size of the gap is unified.

また、弁体装着孔に装着した弁体の調整弁部を弁孔に貫通させ、調整弁部の先端に弁部材に係合可能な抜け止め部材を備えたことで、メンテナンス時に、シリンダ室から圧流体（圧油）を排出したり清掃等を行っても、弁体が弁部材から脱落することがなく紛失することがない。更に、弁体に設けた貫通孔の収納孔に鋼球と逆止ばねを挿入し、前記貫通孔の一方を装着部材で塞ぐようにしたことで、逆止ばねや鋼球の交換が容易に行え、交換部品も安価なものとなる。   In addition, the adjustment valve part of the valve body attached to the valve body attachment hole is penetrated through the valve hole, and a retaining member that can be engaged with the valve member is provided at the tip of the adjustment valve part. Even if the pressurized fluid (pressure oil) is discharged or cleaned, the valve body does not fall off the valve member and is not lost. Furthermore, by inserting a steel ball and a check spring into the through hole provided in the valve body and closing one of the through holes with a mounting member, the check spring and the steel ball can be easily replaced. This can be done, and the replacement parts are also inexpensive.

図１に示すクランプ装置１のシリンダ本体２は、シリンダ穴３ａを備えたシリンダチューブ３の一端がロッドカバー４で塞がれ、内部にシリンダ室５が形成されている。シリンダ室５には環状のピストン６が軸方向移動可能に嵌装されており、シリンダ室５をヘッド側シリンダ室７とロッド側シリンダ室８とに区画している。ピストン６に形成されたメネジ部９にはピストンロッド１０の下端部が螺合されている。ピストンロッド１０の上端部はロッドカバー４から軸線前方に突出し、その上端部のテーパ面１０ａにクランパ１１がナット１２によって固定されている。ピストンロッド１０の外周面には、図５に示すように複数（４つ）の旋回用案内溝１３が設けられている。旋回用案内溝１３は、軸線方向に形成したカム溝１４と円周方向に形成した斜めのカム溝１５とから成り、カム溝１４の案内面１４ａとカム溝１５の案内面１５ａとが連続するようになっている。また、図４，５のように、隣り合うカム溝１４，１５のもう一方の側面１４ｂ，１５ｂ間に壁Ｔが形成されているが、側面１４ｂ，１５ｂがなくても構わないので壁Ｔを加工によって取り除いてもよい。各旋回用案内溝１３に係合させるピン部材１６がシリンダ本体２のロッドカバー４に設けられている。   In the cylinder body 2 of the clamping device 1 shown in FIG. 1, one end of a cylinder tube 3 having a cylinder hole 3a is closed by a rod cover 4, and a cylinder chamber 5 is formed inside. An annular piston 6 is fitted in the cylinder chamber 5 so as to be movable in the axial direction, and the cylinder chamber 5 is partitioned into a head side cylinder chamber 7 and a rod side cylinder chamber 8. The lower end portion of the piston rod 10 is screwed to the female thread portion 9 formed on the piston 6. An upper end portion of the piston rod 10 projects forward from the rod cover 4 in the axial direction, and a clamper 11 is fixed to a tapered surface 10 a of the upper end portion by a nut 12. A plurality (four) of turning guide grooves 13 are provided on the outer peripheral surface of the piston rod 10 as shown in FIG. The turning guide groove 13 includes a cam groove 14 formed in the axial direction and an oblique cam groove 15 formed in the circumferential direction, and the guide surface 14a of the cam groove 14 and the guide surface 15a of the cam groove 15 are continuous. It is like that. 4 and 5, the wall T is formed between the other side surfaces 14b and 15b of the adjacent cam grooves 14 and 15, but the side surfaces 14b and 15b may not be provided, so the wall T is formed. It may be removed by processing. A pin member 16 to be engaged with each turning guide groove 13 is provided on the rod cover 4 of the cylinder body 2.

前記ロッドカバー４は、外形がシリンダチューブ３の外形よりさらにチューブ半径方向の外側に広がった略矩形を成し、その下面４ａから前記シリンダ穴３ａに嵌入される嵌入軸部１７が突出している。嵌入軸部１７には、孔軸線ＨＬがピストンロッド１０の軸線ＣＬ（長手方向）と交差しないように設けた複数の取付孔１８にピン部材１６を夫々回動自在に嵌装している。図４では、ロッドカバー４の嵌入軸部１７に、一対一組とする二組の取付孔１８をシリンダ中心線（ピストンロッド１０の軸線ＣＬ）に対して対称に設け、それら一対の取付孔１８の孔軸線ＨＬの一方がピストンロッド１０側に向かってピストンロッド１０の軸線ＣＬの右側を通り、他方が左側を通るように設けてある。   The rod cover 4 has a substantially rectangular shape whose outer shape extends further outward in the tube radial direction than the outer shape of the cylinder tube 3, and a fitting shaft portion 17 that is fitted into the cylinder hole 3a protrudes from the lower surface 4a. In the insertion shaft portion 17, pin members 16 are rotatably fitted in a plurality of mounting holes 18 provided so that the hole axis HL does not intersect the axis CL (longitudinal direction) of the piston rod 10. In FIG. 4, two sets of mounting holes 18, which are a pair, are provided in the insertion shaft portion 17 of the rod cover 4 symmetrically with respect to the cylinder center line (the axis CL of the piston rod 10). One of the hole axis lines HL is provided so as to pass through the right side of the axis line CL of the piston rod 10 toward the piston rod 10 side and the other through the left side.

次に、取付孔１８に嵌装したピン部材１６のピストンロッド１０側の端部１９は、ピストンロッド１０の軸線ＣＬ側１９ａと反対側１９ｂが取付孔１８の内側開口部付近に位置し、ピストンロッド１０の軸線ＣＬ側１９ａが取付孔１８の内側開口部からピストンロッド１０側へ突出するように設け、ピン部材１６におけるピストンロッド１０の軸線ＣＬ側と反対側の外周面２０が略全長に亘って取付孔１８の内面で支承されるようにしてある。尚、複数の取付孔１８の少なくとも２つは、それらの孔軸線ＨＬの一方がピストンロッド１０側に向かってピストンロッド１０の軸線ＣＬの右側を通り、他方が左側を通るように設け、夫々の取付孔１８に嵌装したピン部材１６と旋回用案内溝１３との係合量Ｌが、ピストンロッド１０の軸線ＣＬを中心とする回動方向において互いにピン部材１６の逆側で大きくなるようにしてある。
ロッドカバー４には一対の給排路２１，２２が設けられている。一方の給排路２１は、ロッドカバー４の流体通路２３を介してシリンダチューブ３の長手方向に設けた連通路２４の一端に連通している。その連通路２４の他端はヘッド側シリンダ室７に連通している。他方の給排路２２は、ロッドカバー４の別の流体通路２５を介してロッド側シリンダ室８に連通している。各給排路２１，２２の途中に連通する弁装着穴２６をシリンダ本体２の外側面から設け、その弁装着穴２６に流体通路２５を流れる圧流体の流量を調整可能な流量調整弁２７とプラグ２８が夫々装着されている。 Next, the end 19 on the piston rod 10 side of the pin member 16 fitted in the mounting hole 18 is located near the inner opening of the mounting hole 18 on the side 19b opposite to the axis CL side 19a of the piston rod 10. An axis CL side 19a of the rod 10 is provided so as to protrude from the inner opening of the mounting hole 18 to the piston rod 10 side, and the outer peripheral surface 20 of the pin member 16 opposite to the axis CL side of the piston rod 10 covers substantially the entire length. Thus, it is supported on the inner surface of the mounting hole 18. At least two of the plurality of mounting holes 18 are provided such that one of the hole axis lines HL passes the right side of the axis line CL of the piston rod 10 toward the piston rod 10 side and the other passes the left side. The engagement amount L between the pin member 16 fitted in the mounting hole 18 and the turning guide groove 13 is set to be larger on the opposite side of the pin member 16 in the rotation direction around the axis line CL of the piston rod 10. It is.
The rod cover 4 is provided with a pair of supply / discharge paths 21 and 22. One supply / discharge passage 21 communicates with one end of a communication passage 24 provided in the longitudinal direction of the cylinder tube 3 via a fluid passage 23 of the rod cover 4. The other end of the communication passage 24 communicates with the head side cylinder chamber 7. The other supply / discharge passage 22 communicates with the rod side cylinder chamber 8 via another fluid passage 25 of the rod cover 4. A valve mounting hole 26 communicating with each of the supply and discharge passages 21 and 22 is provided from the outer surface of the cylinder body 2, and a flow rate adjusting valve 27 capable of adjusting the flow rate of the pressurized fluid flowing through the fluid passage 25 in the valve mounting hole 26; Plugs 28 are respectively attached.

前記流量調整弁２７について説明する。流量調整弁２７は、弁部材２９の弁体装着孔３０に弁体３１を装着して構成される。弁部材２９は、六角形状の大径部２９ａと外周にネジ部を設けた小径部２９ｂとから成り、内側に弁孔３２と弁体装着孔３０が夫々設けられている。弁部材２９の大径部２９ａの端面がシリンダ本体２の外側面に当接するまでシリンダ本体２の弁装着穴２６に捩じ込まれている。大径部２９ａと小径部２９ｂには夫々シール部材３３が取り付けられている。また、弁部材２９の小径部２９ｂには弁体装着孔３０に連通するように複数（４つ）の第１連通孔３４が設けられている。
弁体３１は、前記弁体装着孔３０の外側に螺合された装着部材３５と弁体装着孔３０のシリンダ室５側に嵌挿された弁体部材３６とで構成される。弁体部材３６にはシール部材３７が取り付けられている。弁体部材３６に軸線方向へ貫通する貫通孔３８が設けられている。その貫通孔３８のシリンダ室５側部分が小径の逆止弁孔３９に形成され、外側部分が大径の収納孔４０に夫々形成されている。収納孔４０には逆止弁体４１（例えば鋼球）が挿入されている。装着部材３５と鋼球４１の間に逆止ばね４２を介在させ、そのばね４２によって付勢された鋼球４１により逆止弁孔３９が塞がれている。また、弁体３１の弁体部材３６には収納孔４０に連通するように複数（４つ）の第２連通孔４３が設けられている。弁体３１の弁体部材３６には、弁部材２９の弁孔３２に挿入させる調整弁部４４が設けられている。その調整弁部４４の先端には抜け止め部材４５（例えばＣ形止め輪）が取り付けられている。弁体３１の装着部材３５には六角レンチ等の工具を係合させる六角孔４６が設けられている。更に、弁体３１の装着部材３５に捩じ込んだナット４７により弁体３１が弁部材２９から抜け出さないようにしてある。 The flow rate adjusting valve 27 will be described. The flow rate adjusting valve 27 is configured by mounting a valve body 31 in a valve body mounting hole 30 of a valve member 29. The valve member 29 includes a hexagonal large-diameter portion 29a and a small-diameter portion 29b provided with a screw portion on the outer periphery, and a valve hole 32 and a valve body mounting hole 30 are provided on the inner side. The valve member 29 is screwed into the valve mounting hole 26 of the cylinder body 2 until the end surface of the large-diameter portion 29a contacts the outer surface of the cylinder body 2. Seal members 33 are attached to the large diameter portion 29a and the small diameter portion 29b, respectively. A plurality of (four) first communication holes 34 are provided in the small diameter portion 29 b of the valve member 29 so as to communicate with the valve body mounting hole 30.
The valve body 31 includes a mounting member 35 that is screwed to the outside of the valve body mounting hole 30 and a valve body member 36 that is fitted into the valve body mounting hole 30 on the cylinder chamber 5 side. A seal member 37 is attached to the valve body member 36. The valve body member 36 is provided with a through hole 38 penetrating in the axial direction. A portion of the through hole 38 on the cylinder chamber 5 side is formed in a small check valve hole 39, and an outer portion is formed in a large diameter storage hole 40. A check valve body 41 (for example, a steel ball) is inserted into the storage hole 40. A check spring 42 is interposed between the mounting member 35 and the steel ball 41, and the check valve hole 39 is closed by the steel ball 41 urged by the spring 42. The valve body member 36 of the valve body 31 is provided with a plurality (four) of second communication holes 43 so as to communicate with the storage hole 40. The valve body member 36 of the valve body 31 is provided with an adjustment valve portion 44 that is inserted into the valve hole 32 of the valve member 29. A retaining member 45 (for example, a C-shaped retaining ring) is attached to the tip of the adjustment valve portion 44. The mounting member 35 of the valve body 31 is provided with a hexagon hole 46 for engaging a tool such as a hexagon wrench. Further, the valve body 31 is prevented from coming out of the valve member 29 by a nut 47 screwed into the mounting member 35 of the valve body 31.

上記構成の流量調整弁２７では、外側の給排路２２ａから圧流体（圧油）が供給される場合、図６に示すように、弁装着穴２６、弁部材２９の第１連通孔３４、弁体装着孔３０、弁体３１の第２連通孔４３を介して弁体３１の収納孔４０へ流れ込むと共に、弁体装着孔３０から弁孔３２と調整弁部４４との間の隙間Ｓに流れ込むようになっている。鋼球４１によって逆止弁孔３９が塞がれているので、圧流体（圧油）は弁孔３２と調整弁部４４の間の隙間Ｓのみを通過することになる。一方、シリンダ室５側の給排路２２ｂから圧流体（圧油）が排出される場合、図８に示すように、弁体３１の逆止弁孔３９へ流れ込むと共に、弁孔３２と調整弁孔４４との間の隙間Ｓに流れ込むようになっている。逆止弁孔３９に流れる圧流体（圧油）により鋼球４１が装着部材３５に向かって押圧され、逆止弁孔３９を開放することで逆止弁孔３９から収納孔４０を通過して弁体３１の第２連通孔４３から弁体装着孔３０に流れ、弁孔３２と調整弁部４４との間の隙間Ｓを通過してきた圧流体（圧油）と共に、弁部材２９の第１連通孔３４、弁装着穴２６を介して外側の給排路２２ａに流れるようになっている。従って、弁体３１を前後方向に移動させ、弁孔３２と調整弁部４４との間の隙間Ｓの大きさを調整することで、外側の給排路２２ａからシリンダ室５側の給排路２２ｂに供給される圧流体（圧油）の流量が調整されるようになっている。   When the pressurized fluid (pressure oil) is supplied from the outer supply / discharge passage 22a in the flow rate adjustment valve 27 having the above-described configuration, as shown in FIG. 6, the valve mounting hole 26, the first communication hole 34 of the valve member 29, It flows into the storage hole 40 of the valve body 31 through the valve body mounting hole 30 and the second communication hole 43 of the valve body 31, and also into the clearance S between the valve body mounting hole 30 and the valve hole 32 and the adjustment valve portion 44. It comes to flow. Since the check valve hole 39 is closed by the steel ball 41, the pressurized fluid (pressure oil) passes only through the gap S between the valve hole 32 and the adjustment valve portion 44. On the other hand, when the pressurized fluid (pressure oil) is discharged from the supply / discharge passage 22b on the cylinder chamber 5 side, as shown in FIG. 8, it flows into the check valve hole 39 of the valve body 31, and the valve hole 32 and the regulating valve. It flows into the gap S between the holes 44. The steel ball 41 is pressed toward the mounting member 35 by the pressurized fluid (pressure oil) flowing through the check valve hole 39, and the check valve hole 39 is opened to pass through the storage hole 40 from the check valve hole 39. Along with the pressurized fluid (pressure oil) that flows from the second communication hole 43 of the valve body 31 to the valve body mounting hole 30 and passes through the gap S between the valve hole 32 and the adjustment valve portion 44, the first of the valve member 29. It flows through the communication hole 34 and the valve mounting hole 26 to the outer supply / discharge path 22a. Therefore, by moving the valve body 31 in the front-rear direction and adjusting the size of the gap S between the valve hole 32 and the adjustment valve portion 44, the supply / discharge path on the cylinder chamber 5 side from the outer supply / discharge path 22a. The flow rate of the pressurized fluid (pressure oil) supplied to 22b is adjusted.

次に、上記構成のクランプ装置１の動作について説明する。図２に示すようなクランパ１１がアンクランプ位置Ｂの状態において、他方の給排路２２から流量調整弁２７、流体通路２５を介してロッド側シリンダ室８に圧流体（圧油）が供給されると、ピストン６が軸線下方に移動すると共に、ピン部材１６に係合した旋回用案内溝１３に沿ってピストンロッド１０が軸線下方に移動しつつ９０度旋回し、その後、その旋回位置を保ってワークＷに向けて降下してクランプ位置Ａでクランパ１１がワークＷをクランプするようになっている。また、図１に示すようなクランパ１１がクランプ位置Ａの状態において、一方の給排路２１から流体通路２３、連通路２４を介してヘッド側シリンダ室７に圧流体（圧油）が供給されると、ピストン６が軸線上方に移動すると共に、ピストンロッド１０が前記と逆に動作することで、クランパ１１がアンクランプ位置Ｂの状態となる。   Next, operation | movement of the clamp apparatus 1 of the said structure is demonstrated. When the clamper 11 is in the unclamping position B as shown in FIG. 2, pressurized fluid (pressure oil) is supplied from the other supply / discharge passage 22 to the rod side cylinder chamber 8 through the flow rate adjustment valve 27 and the fluid passage 25. As a result, the piston 6 moves downward along the axis, and the piston rod 10 turns 90 degrees while moving downward along the axis along the turning guide groove 13 engaged with the pin member 16, and then maintains the turning position. The clamper 11 is lowered toward the workpiece W and the clamper 11 clamps the workpiece W at the clamp position A. Further, when the clamper 11 is in the clamp position A as shown in FIG. 1, pressurized fluid (pressure oil) is supplied from one supply / discharge passage 21 to the head side cylinder chamber 7 via the fluid passage 23 and the communication passage 24. Then, the piston 6 moves upward along the axis, and the piston rod 10 operates in the reverse direction to that described above, so that the clamper 11 is in the unclamping position B.

従って、図９のような、クランプ装置１を複数設置した治具６０を用いて大きなワークＷ１をクランプする場合には、各クランプ装置１Ａ〜１Ｆに備えた流量調整弁２７によりロッド側シリンダ室８に供給する圧流体（圧油）の供給流量を調整することで、圧流体（圧油）の供給源６１から各クランプ装置１Ａ〜１Ｆまでの距離が異なっても各クランプ装置１Ａ〜１Ｆによるクランプのタイミングを同時とすることが容易に行なえる。また、シリンダ本体２に装着する弁部材２９に設けた弁孔３２に弁体３１の調整弁部４４を挿入させると圧流体（圧油）の流量を調整する隙間Ｓが設けられることで、シリンダ本体２に弁部材２９を装着しなくても弁孔３２と調整弁部４４による隙間Ｓの大きさを確認することが出来るために、各クランプ装置１で前記隙間Ｓの大きさを統一させることができる。また、弁孔３２を貫通した弁体３１の調整弁部４４の先端に抜け止め部材４５を備えたことで、図１０のように、メンテナンス時に、シリンダ室８から圧流体（圧油）を排出したり清掃等を行っても、弁体３１が弁部材２９から脱落することがなく紛失することを防止できる。更に、弁体３１に設けた貫通孔３８の収納孔４０に鋼球４１と逆止ばね４２を挿入し、前記貫通孔３８の一方を装着部材３５で塞ぐようにしたことで、逆止ばね４２や鋼球４１の交換が容易に行えるから、従来に比べて、交換部品を安価とすることができる。   Accordingly, when a large workpiece W1 is clamped using a jig 60 having a plurality of clamping devices 1 as shown in FIG. 9, the rod side cylinder chamber 8 is controlled by the flow rate adjusting valve 27 provided in each of the clamping devices 1A to 1F. By adjusting the supply flow rate of the pressurized fluid (pressure oil) supplied to the clamp, even if the distance from the supply source 61 of the pressurized fluid (pressure oil) to each of the clamp devices 1A to 1F differs, the clamps by the clamp devices 1A to 1F It is easy to make the timings at the same time. Further, when the adjusting valve portion 44 of the valve body 31 is inserted into the valve hole 32 provided in the valve member 29 attached to the cylinder body 2, a clearance S for adjusting the flow rate of the pressurized fluid (pressure oil) is provided, so that the cylinder Since the size of the gap S between the valve hole 32 and the adjusting valve portion 44 can be confirmed without mounting the valve member 29 on the main body 2, the size of the gap S should be unified in each clamping device 1. Can do. Further, by providing a retaining member 45 at the tip of the adjustment valve portion 44 of the valve body 31 that penetrates the valve hole 32, the pressurized fluid (pressure oil) is discharged from the cylinder chamber 8 during maintenance as shown in FIG. Even if the cleaning or the like is performed, it is possible to prevent the valve body 31 from being lost from the valve member 29 without dropping. Further, a steel ball 41 and a check spring 42 are inserted into the accommodation hole 40 of the through hole 38 provided in the valve body 31 so that one of the through holes 38 is closed by the mounting member 35, so that the check spring 42. Since the steel ball 41 can be easily replaced, the replacement parts can be made cheaper than in the past.

本発明のクランプ状態であるクランプ装置の縦断面図である。It is a longitudinal cross-sectional view of the clamp apparatus which is the clamp state of this invention. アンクランプ状態であるクランプ装置の縦断面図である。It is a longitudinal cross-sectional view of the clamp apparatus which is an unclamp state. 図１の平面図である。It is a top view of FIG. 図１のＩＶ−ＩＶ線断面図である。It is the IV-IV sectional view taken on the line of FIG. ピストンロッドの外周面展開図である。It is an outer peripheral surface development view of a piston rod. 図３のＶＩ−ＶＩ線断面図である。It is the VI-VI sectional view taken on the line of FIG. 図６のＶＩＩ―ＶＩＩ線断面図でシリンダ本体を省略した図である。It is the figure which abbreviate | omitted the cylinder main body in the VII-VII sectional view taken on the line of FIG. 圧流体を排出させた状態を示す図である。It is a figure which shows the state which discharged the pressurized fluid. 大きなワークをクランプするように構成された治具を示す図である。It is a figure which shows the jig | tool comprised so that a big workpiece | work may be clamped. 弁体を後方に移動させた状態を示す図である。It is a figure which shows the state which moved the valve body back.

符号の説明Explanation of symbols

１ クランプ装置
２ シリンダ本体
５ シリンダ室
６ ピストン
１０ ピストンロッド
１１ クランパ
２１ 給排路
２２ 給排路
２２ａ 外側の給排路
２２ｂ シリンダ室側の給排路
２６ 弁装着穴
２７ 流量調整弁
２９ 弁部材
３０ 弁体装着孔
３１ 弁体
３２ 弁孔
３５ 装着部材
３６ 弁体部材
３８ 貫通孔
３９ 逆止弁孔
４０ 収納孔
４１ 鋼球
４２ 逆止ばね
４４ 調整弁部
４５ 抜け止め部材
Ｓ 隙間
Ｗ ワーク DESCRIPTION OF SYMBOLS 1 Clamp apparatus 2 Cylinder main body 5 Cylinder chamber 6 Piston 10 Piston rod 11 Clamper 21 Supply / discharge path 22 Supply / discharge path 22a Outer supply / discharge path 22b Cylinder chamber side supply / discharge path 26 Valve mounting hole 27 Flow rate adjusting valve 29 Valve member 30 Valve body mounting hole 31 Valve body 32 Valve hole 35 Mounting member 36 Valve body member 38 Through hole 39 Check valve hole 40 Storage hole 41 Steel ball 42 Check spring 44 Adjusting valve part 45 Retaining member S Clearance W Workpiece

Claims (3)

シリンダ本体に設けたシリンダ室にピストンを軸方向移動可能に嵌装し、そのピストンに連結したピストンロッドをシリンダ本体の一端部から突出させ、シリンダ本体の給排路から一方のシリンダ室に圧流体を供給すると共に他方のシリンダ室から圧流体を排出することでピストンを移動させ、ピストンロッドに設けたクランパがワークに対してクランプ、アンクランプするようにしたクランプ装置において、シリンダ本体の外側面から給排路の途中に連通する弁装着穴を設け、その弁装着穴に給排路を流れる圧流体の流量を調整可能な流量調整弁を装着し、その流量調整弁は、シリンダ本体の弁装着穴に装着され、外側の給排路をシリンダ室側の給排路に連通させる弁孔と外側面から弁孔に向けて設けた弁体装着孔を有する弁部材を備えると共に、弁部材の弁体装着孔に弁孔に向けて移動可能に装着され、弁孔との間の隙間の大きさを調整可能な調整弁部と、シリンダ室側の給排路を外側の給排路に連通させる逆止弁孔を有し、逆止弁孔の途中にシリンダ室側への流れを逆止し外側への流れを許す逆止弁体を内蔵している弁体を備え、給排路に供給した圧流体を弁孔と調整弁部の間の隙間に通過させてシリンダ室に供給し、シリンダ室から排出される圧流体を前記隙間と逆止弁孔に通過させて給排路から排出するようにしたことを特徴とするクランプ装置。 A piston is fitted in a cylinder chamber provided in the cylinder body so as to be movable in the axial direction, a piston rod connected to the piston is protruded from one end of the cylinder body, and pressure fluid is supplied from the supply / discharge passage of the cylinder body to one cylinder chamber. In the clamping device in which the piston is moved by discharging the pressurized fluid from the other cylinder chamber and the clamper provided on the piston rod clamps and unclamps the workpiece, from the outer surface of the cylinder body A valve mounting hole communicating in the middle of the supply / discharge path is provided, and a flow rate adjustment valve capable of adjusting the flow rate of the pressurized fluid flowing through the supply / discharge path is installed in the valve installation hole. A valve member that is mounted in the hole and has a valve hole that connects the outer supply / discharge passage to the supply / discharge passage on the cylinder chamber side and a valve body attachment hole that is provided from the outer surface toward the valve hole; Both are mounted in the valve body mounting hole of the valve member so as to be movable toward the valve hole, and the adjustment valve portion capable of adjusting the size of the gap between the valve hole and the supply / discharge passage on the cylinder chamber side on the outside It has a check valve hole that communicates with the supply / exhaust passage, and has a valve element that incorporates a check valve element that prevents the flow to the cylinder chamber and allows the flow to the outside in the middle of the check valve hole. Then, the pressurized fluid supplied to the supply / discharge passage is passed through the gap between the valve hole and the regulating valve portion to be supplied to the cylinder chamber, and the pressurized fluid discharged from the cylinder chamber is passed through the gap and the check valve hole. A clamping device characterized by discharging from a supply / discharge path. 弁体装着孔に装着した弁体の調整弁部を弁孔に貫通させ、調整弁部の先端に弁部材に係合可能な抜け止め部材を備えて成ることを特徴とする請求項１記載のクランプ装置。 2. The valve body of the valve body mounted in the valve body mounting hole is provided with a retaining member that penetrates the valve hole and is engageable with the valve member at the tip of the valve body. Clamping device. 弁体を、弁部材の弁体装着孔に螺合された装着部材と弁部材の弁体装着孔に嵌挿された弁体部材とで構成し、弁体部材に軸線方向へ貫通する貫通孔を設け、その貫通孔のシリンダ室側部分を小径の逆止弁孔に、外側部分を大径の収納孔に夫々形成し、装着部材と逆止弁体の間に逆止ばねを介在させて成ることを特徴とする請求項１または２記載のクランプ装置。 The valve body is composed of a mounting member screwed into the valve body mounting hole of the valve member and a valve body member fitted into the valve body mounting hole of the valve member, and a through hole penetrating the valve body member in the axial direction The cylinder chamber side portion of the through hole is formed as a small check valve hole, and the outer portion is formed as a large diameter storage hole, and a check spring is interposed between the mounting member and the check valve body. The clamping device according to claim 1, wherein the clamping device is formed.
JP2008020020A 2008-01-31 2008-01-31 Clamping device Pending JP2009178802A (en)

Priority Applications (1)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105458975A (en) * 2015-12-31 2016-04-06 江苏大通汽车模具零部件有限公司 Die clamping device
CN107553791A (en) * 2017-09-19 2018-01-09 东莞市联洲知识产权运营管理有限公司 A kind of improved device for clamping mould of structure
JP2020019190A (en) * 2018-07-31 2020-02-06 キョーラク株式会社 Holding device
JP2021050765A (en) * 2019-09-24 2021-04-01 株式会社コスメック Cylinder device
BE1027875B1 (en) * 2019-12-17 2021-07-15 Safran Aero Boosters Sa PART CLAMPING SYSTEM

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60129472A (en) * 1983-12-15 1985-07-10 Hitachi Constr Mach Co Ltd Gauge valve
JPS62153406U (en) * 1986-03-22 1987-09-29
JPH02132175U (en) * 1989-04-08 1990-11-02
JPH0338463U (en) * 1989-08-24 1991-04-15
JP2004360718A (en) * 2003-06-02 2004-12-24 Pascal Engineering Corp Clamping device
WO2005075867A1 (en) * 2004-02-04 2005-08-18 Kosmek Ltd. Flow control valve and cylinder device with flow control valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60129472A (en) * 1983-12-15 1985-07-10 Hitachi Constr Mach Co Ltd Gauge valve
JPS62153406U (en) * 1986-03-22 1987-09-29
JPH02132175U (en) * 1989-04-08 1990-11-02
JPH0338463U (en) * 1989-08-24 1991-04-15
JP2004360718A (en) * 2003-06-02 2004-12-24 Pascal Engineering Corp Clamping device
WO2005075867A1 (en) * 2004-02-04 2005-08-18 Kosmek Ltd. Flow control valve and cylinder device with flow control valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105458975A (en) * 2015-12-31 2016-04-06 江苏大通汽车模具零部件有限公司 Die clamping device
CN107553791A (en) * 2017-09-19 2018-01-09 东莞市联洲知识产权运营管理有限公司 A kind of improved device for clamping mould of structure
JP2020019190A (en) * 2018-07-31 2020-02-06 キョーラク株式会社 Holding device
JP7104316B2 (en) 2018-07-31 2022-07-21 キョーラク株式会社 Holding device
JP2021050765A (en) * 2019-09-24 2021-04-01 株式会社コスメック Cylinder device
BE1027875B1 (en) * 2019-12-17 2021-07-15 Safran Aero Boosters Sa PART CLAMPING SYSTEM

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