WO2014104123A1 - シリンダ装置 - Google Patents
シリンダ装置 Download PDFInfo
- Publication number
- WO2014104123A1 WO2014104123A1 PCT/JP2013/084734 JP2013084734W WO2014104123A1 WO 2014104123 A1 WO2014104123 A1 WO 2014104123A1 JP 2013084734 W JP2013084734 W JP 2013084734W WO 2014104123 A1 WO2014104123 A1 WO 2014104123A1
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- WO
- WIPO (PCT)
- Prior art keywords
- detection
- valve
- piston
- cylinder device
- pressure receiving
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/08—Actuation of distribution members
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- 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
-
- 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
-
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1013—Adaptations or arrangements of distribution members the members being of the poppet valve type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/121—Casings
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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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/204—Control means for piston speed or actuating force without external control, e.g. control valve inside the piston
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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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches
Definitions
- the present invention relates to a cylinder device provided with a function for detecting a moving position of a piston, and more specifically, to a cylinder device suitable for use in a workpiece clamp.
- Patent Document 1 Japanese Patent Laid-Open No. 60-129410
- a piston is inserted into the housing so as to be movable in the left-right direction, and detection valves for confirming the left and right movement positions of the piston are arranged on the left and right end walls of the housing, respectively.
- a structure is described in which the detection rod of the valve is operated by the piston.
- An object of the present invention is to provide a cylinder device in which maintenance of a detection valve is easy.
- the present invention has a cylinder device configured as follows.
- the piston 10 is inserted into the housing 1 so as to be able to move up and down, and a pressurized fluid for driving can be supplied to and discharged from a driving chamber 11 disposed above the piston 10.
- An output rod 15 inserted in the upper wall 2 of the housing 1 is connected to the piston 10.
- the first detection valve 31 for detecting the lowering and the second detection valve 32 for detecting the raising are arranged on the upper wall 2 at a predetermined interval in the circumferential direction.
- Each of the first detection valve 31 and the second detection valve 32 has operated portions 49 and 79 that face the piston 10 from above.
- the pressurized air for detection can be supplied to the inlets 31a and 32a of the first detection valve 31 and the second detection valve 32 via the first supply path B1 and the second supply path B2.
- the present invention has the following effects.
- two detection valves On the outer peripheral side of the output rod inserted into the upper wall of the housing, two detection valves, a first detection valve for lowering detection and a second detection valve for highering detection, are arranged on the upper wall.
- the two detection valves Even when the lower wall is attached to a fixed base such as a table or the lower half of the housing is inserted into the mounting hole of the fixed base, the two detection valves can be accessed from above. For this reason, the maintenance of the detection valve is not time-consuming.
- the two detection valves are installed in the upper wall, the surplus space on the upper wall can be used as an installation space, so that the cylinder device can be maintained in a compact state. Therefore, it is possible to provide a compact cylinder device that facilitates maintenance of the detection valve.
- each axial center of the first detection valve 31 and the second detection valve 32 is inclined so as to approach the axial center of the piston 10 as it goes downward, and the inclination angle is 5 degrees to 15 degrees. It is preferable to set within the range. According to the above invention, it is possible to prevent the two detection valves from interfering with the sealing member or scraper mounted on the upper wall on the outer peripheral side of the output rod, and to reduce the radial dimension of the housing. Therefore, the cylinder device can be made compact.
- the upper wall 2 is formed in a rectangular shape or a square shape in plan view, and any one of the four wall portions corresponding to the four sides in the circumferential direction of the upper wall 2.
- a supply / exhaust passage 21 communicating with the drive chamber 11 is formed, and the first detection is performed on any one of the four wall portions excluding the wall portion forming the supply / exhaust passage 21. It is preferable to provide the valve 31 and the second detection valve 32. According to the above configuration, the cylinder device can be made more compact.
- the upper wall 2 has a flange 7 for mounting, and a supply / discharge port communicated with the supply / discharge path 21 to an installation surface 7 a formed on the lower surface of the outer peripheral portion of the flange 7.
- P1 is preferably opened.
- the first detection valve 31 for detecting the lowering is opened by the piston 10 while the piston 10 is moving from the lower limit position to the upper limit position, and the piston 10 is moved from the upper limit position to a predetermined first position.
- the second detection valve 32 for detecting an increase is configured so that the piston 10 is moved from the lower limit position to the upper limit position or a position near the upper limit position.
- the valve is closed by the piston 10 and is opened when the piston 10 is lowered from the upper limit position by a predetermined second stroke S2, and the length of the second stroke S2 is set to the first stroke. A value smaller than the length of the stroke S1 is set. According to the above configuration, the lowered position and the raised position can be reliably distinguished and detected.
- the first detection valve 31 of the present invention is preferably configured as follows, for example, as shown in FIGS. 4A and 4B. That is, the first detection valve 31 for detecting the lowering is attached to the first mounting hole M1 formed in the upper wall 2 so as to face the drive chamber 11 from above, and the first mounting hole M1.
- the first detection rod 41 is formed on the first detection rod 41 so that the pressure chamber 51 communicates with the driving chamber 11.
- the pressure chamber 51 is formed on the upper pressure receiving portion 47.
- a through-hole 52, a poppet-shaped valve surface 55 formed below the upper pressure receiving portion 47, and the first casing C1 are closed by the valve surface 55 when the first detection rod 41 is lowered.
- the second detection valve 32 of the present invention is preferably configured as follows, for example, as shown in FIGS. 5A and 5B. That is, the second detection valve 32 for detecting the rise is attached to the second mounting hole M2 formed in the upper wall 2 so as to face the drive chamber 11 from above, and the second mounting hole M2.
- the second detection rod 42 is formed on the second detection rod 42 so as to communicate with the drive chamber 11.
- the pressure chamber 81 is formed on the upper pressure receiving portion 77.
- Valve formed into It includes a 84, a. According to the said structure, the 2nd detection valve for a raise detection can be reliably closed with a simple structure.
- FIG. 1A shows a workpiece clamp using the cylinder device of the present invention, and is an elevation view of the clamp in an unclamped state, corresponding to a cross-sectional view taken along line 1A-1A in FIG. 2A.
- FIG. 1B corresponds to a cross-sectional view taken along line 1B-1B in FIG. 2A and is similar to FIG. 1A.
- FIG. 2A is a plan view of FIG. 1A.
- FIG. 2B is a diagram corresponding to the right side surface of FIG. 2A.
- FIG. 3A is a view similar to FIG. 1A, showing a clamped state of the clamp.
- FIG. 3B is also a view similar to FIG. 1B, showing the clamp state of the clamp.
- FIG. 1A shows a workpiece clamp using the cylinder device of the present invention, and is an elevation view of the clamp in an unclamped state, corresponding to a cross-sectional view taken along line 1A-1A in FIG. 2A.
- FIG. 4A is a partially enlarged view of FIG. 1A, and shows a first detection valve for detecting descent in the unclamped state.
- FIG. 4B is a partially enlarged view of FIG. 3A showing the first detection valve in the clamped state.
- FIG. 5A is a partially enlarged view of FIG. 1B and shows a second detection valve for detecting an increase in the unclamped state.
- FIG. 5B is a partially enlarged view of FIG. 3B showing the second detection valve in the clamped state.
- SYMBOLS 1 Housing, 2: Upper wall, 7: Flange, 7a: Installation surface, 10: Piston, 11: Drive chamber (1st drive chamber), 15: Output rod, 21: Supply / discharge path (1st supply / discharge path) , 31: first detection valve, 31a: inlet, 32: second detection valve, 32a: inlet, 41: first detection rod, 42: second detection rod, 45: lower pressure receiving portion, 47: upper pressure receiving portion, 49 : Operated part, 51: pressure chamber, 52: through hole, 54: valve seat, 55: valve face, 75: lower pressure receiving part, 77: upper pressure receiving part, 79: operated part, 81: pressure chamber, 82: Through hole, 84: valve hole, 85: valve surface, B1: first supply path, B2: second supply path, C1: first casing, C2: second casing, M1: first mounting hole, M2: second Mounting hole, P1: supply / discharge port (first supply / discharge port), S1: first stroke,
- FIGS. 1A to 5B a case where the cylinder device is applied to a swing clamp for fixing a workpiece is illustrated.
- the overall structure of the above-mentioned swivel clamp will be described with reference to FIGS. 1A to 2B.
- the housing 1 is attached to the table T as a fixed base.
- the housing 1 includes an upper wall 2 as one end wall, a lower wall 3 as the other end wall, a trunk wall 4 extending in the vertical direction, and a cylinder hole 5 formed inside the trunk wall 4.
- the upper wall 2 has a flange 7 for attachment on the outer periphery thereof, and is formed in a rectangular shape in plan view.
- Bolt holes 8 are vertically penetrated at the four corners of the flange 7.
- a mounting surface 7 a formed on the lower surface of the flange 7 is fixed to the upper surface of the table T by fastening bolts (not shown) inserted into the respective bolt holes 8.
- the piston 10 can be moved up and down in the cylinder hole 5 and is inserted in a tight manner.
- a first driving chamber 11 for clamping and a second driving chamber 12 for unclamping are disposed above and below the piston 10.
- a first supply / exhaust passage 21 communicating with the first drive chamber 11 is formed in the left wall portion in plan view among the four wall portions corresponding to the four sides in the circumferential direction of the upper wall 2.
- a second supply / discharge path 22 communicating with the second drive chamber 12 is formed. Further, in the left wall portion of the upper wall 2, a first supply / discharge port P ⁇ b> 1 communicating with the first supply / discharge path 21 is opened on the installation surface 7 a of the flange 7, and a second supply / discharge path is formed.
- the second supply / exhaust port P2 communicated with the port 22 is opened.
- the first drive chamber 11 and the second drive chamber 12 are respectively connected to the first supply / discharge port P1 and the second supply / discharge port P2, and the first supply / discharge passage 21 and the second supply / discharge passage 22, respectively.
- Pressurized oil pressurized fluid for driving
- An output rod 15 is movable in the vertical direction and inserted in a tightly sealed manner in a through hole 14 provided in the central portion of the upper wall 2.
- the output rod 15 is formed integrally with the piston 10.
- a clamp arm 16 is fixed to the upper portion of the output rod 15 with a nut 17.
- a sealing member 18 and a scraper 19 are mounted on the upper wall 2 on the outer peripheral side of the output rod 15.
- the lower rod 24 is integrally protruded downward from the piston 10, and the lower rod 24 is movably inserted into the support hole 25 of the lower wall 3.
- Three guide grooves 26 are formed on the outer peripheral surface of the lower rod 24 at predetermined intervals in the circumferential direction.
- Each guide groove 26 has a well-known structure, and includes a straight rectilinear groove 26a and a spiral turning groove 26b formed in a row.
- Three horizontal holes 27 are formed in the upper part of the peripheral wall of the support hole 25 at predetermined intervals in the circumferential direction, and balls 28 inserted into the respective horizontal holes 27 are fitted in the guide grooves 26.
- a ring 29 is rotatably fitted around the outer periphery of the plurality of balls 28 described above.
- a first detection valve 31 for detecting lowering and a second detection valve 32 for detecting rising are disposed on the outer peripheral side of the output rod 15 in the right wall portion of the four wall portions in plan view. Are provided at predetermined intervals in the circumferential direction.
- Each axis of the first detection valve 31 and the second detection valve 32 is inclined so as to approach the axis of the piston 10 as it goes downward. For this reason, it is possible to prevent the two detection valves 31 and 32 from interfering with the sealing member 18 and the scraper 19 mounted on the upper wall 2 on the outer peripheral side of the output rod 15, and the housing 1 in the radial direction. Therefore, it is possible to make the cylinder device compact.
- the inclination angle is preferably set within a range of 5 degrees to 15 degrees.
- a first supply port A1 and a second supply port A2 are opened on the installation surface 7a formed on the lower surface of the flange 7 so as to supply pressurized air for detection.
- the first supply port A1 and the second supply port A2 communicate with the inlets 31a and 32a of the first detection valve 31 and the second detection valve 32 through the first supply path B1 and the second supply path B2, respectively. Is done.
- FIG. 4A is a partially enlarged view of FIG. 1A.
- FIG. 4B is a partially enlarged view of FIG. 3A.
- the first detection valve 31 is opened by the piston 10 while the piston 10 moves from the lower limit position of FIG. 4B to the upper limit position of FIG. 4A (FIG. 4A shows that the first detection valve 31 has already been fully opened. Status).
- the first detection valve 31 is closed when the piston 10 is lowered from the upper limit position of FIG. 4A by a predetermined first stroke S1 (FIG. 4B shows that the first detection valve 31 has already been fully closed. Status). More specifically, as shown in FIGS. 4A and 4B, the first detection valve 31 is configured as follows.
- a stepped first mounting hole M1 is passed through the upper wall 2 obliquely downward.
- the first mounting hole M1 includes a female screw hole 34, a large-diameter hole 35, a medium-diameter hole 36, and a small-diameter hole 37 that are sequentially communicated downward, and the small-diameter hole 37 faces the first drive chamber 11 from above.
- the first casing C1 attached to the first attachment hole M1 includes a valve cylinder 38 attached to the lower part of the large diameter hole 35 and a push cylinder 39 screwed into the female screw hole 34. The push cylinder 39 presses the valve cylinder 38 against the bottom of the large diameter hole 35.
- the first detection rod 41 is inserted into the first casing C1.
- the first detection rod 41 includes a small-diameter lower pressure receiving portion 45 inserted into the medium-diameter hole 36 via the lower sealing member 44 in a close-packed manner, and a cylindrical hole of the push cylinder 39 via the upper sealing member 46.
- a large-diameter upper pressure receiving portion 47 inserted in a tightly packed manner, and a connecting rod 48 provided between the lower pressure receiving portion 45 and the upper pressure receiving portion 47 are provided.
- the pressure receiving area of the upper pressure receiving portion 47 is set to a value larger than the pressure receiving area of the lower pressure receiving portion 45.
- An operated portion 49 that can contact the piston 10 is provided at the lower end of the lower pressure receiving portion 45.
- a pressure chamber 51 is formed above the upper pressure receiving portion 47. The pressure chamber 51 communicates with the first drive chamber 11 through a through hole 52 formed along the axis of the first detection rod 41.
- An annular valve seat 54 is formed around the upper opening of the cylinder hole of the valve cylinder 38, and a poppet-shaped valve surface 55 is formed below the upper pressure receiving portion 47. As shown in FIG. 4B, the valve surface 55 is configured to come into contact with the valve seat 54 when the first detection rod 41 is lowered.
- An annular inlet passage 56 is formed between the tube hole of the valve cylinder 38 and the outer peripheral surface of the connecting rod 48. Further, a lateral hole 57 is passed through the peripheral wall of the valve cylinder 38, and an inlet 31 a of the first detection valve 31 is configured by the inner end portion of the lateral hole 57. The inlet 31a communicates with the first supply port A1 through the first supply path B1.
- Reference numeral 58 is a plug ball.
- a plurality of radiating grooves 59 are formed on the lower end surface of the push tube 39 at predetermined intervals in the circumferential direction.
- An annular channel 60 is formed between the lower portion of the outer peripheral surface of the push tube 39 and the inner peripheral surface of the large-diameter hole 35, and the first detection valve is formed by a height portion in the middle of the annular channel 60.
- 31 outlets 31b are formed.
- the outlet 31 b communicates with the outside air via a check valve 62 provided in the discharge path 61.
- the check valve 62 includes a valve seat 62a and a spring 62c that biases the ball 62b against the valve seat 62a.
- the second detection valve 32 for detecting the rise is closed by the piston 10 when the piston 10 moves from the lower limit position in FIG. 5B to the upper limit position in FIG. 5A or a position in the vicinity thereof (FIG. 2 shows a state in which the detection valve 32 is already fully closed).
- the second detection valve 32 is opened when the piston 10 is lowered from the upper limit position of FIG. 5A by a predetermined second stroke S2 (FIG. 5B shows a state in which the second detection valve 32 has already been fully opened. Is shown).
- the length of the second stroke S2 is set to a value smaller than the length of the first stroke S1.
- the second detection valve 32 is configured as follows in substantially the same manner as the first detection valve 31.
- a stepped second mounting hole M2 is passed through the upper wall 2 obliquely downward.
- the second mounting hole M2 includes a female screw hole 64, a large-diameter hole 65, a medium-diameter hole 66, and a small-diameter hole 67 that are sequentially communicated downward, and the small-diameter hole 67 faces the first drive chamber 11 from above.
- the second casing C ⁇ b> 2 attached to the second mounting hole M ⁇ b> 2 includes a valve cylinder 68 mounted at the lower part of the large diameter hole 65 and a push cylinder 69 screwed into the female screw hole 64. The push cylinder 69 presses the valve cylinder 68 against the bottom of the large diameter hole 65.
- the second detection rod 42 is inserted into the second casing C2.
- the second detection rod 42 has a small-diameter lower pressure receiving portion 75 inserted into the medium-diameter hole 66 via the lower sealing member 74 in a close-packed manner, and a cylindrical hole of the push cylinder 69 via the upper sealing member 76.
- a large-diameter upper pressure-receiving portion 77 inserted in a confining manner, and a connecting rod 78 provided between the lower pressure-receiving portion 75 and the upper pressure-receiving portion 77 are provided.
- the pressure receiving area of the upper pressure receiving portion 77 is set to a value larger than the pressure receiving area of the lower pressure receiving portion 75.
- An operated portion 79 that can contact the piston 10 is provided at the lower end of the lower pressure receiving portion 75.
- a pressure chamber 81 is formed above the upper pressure receiving portion 77. The pressure chamber 81 communicates with the first drive chamber 11 through a through hole 82 formed along the axis of the second detection rod 42.
- a valve hole 84 passes through the peripheral wall of the valve cylinder 68, and a spool-shaped valve surface 85 and an annular outlet groove 86 are formed in this order from the bottom on the outer peripheral surface of the connecting rod 78.
- the valve surface 85 is configured to close the valve hole 84 when the second detection rod 42 is raised.
- An inlet 32 a of the second detection valve 32 is configured by the inner end portion of the valve hole 84. The inlet 32a communicates with the second supply port A2 through the second supply path B2.
- Reference numeral 88 is a plug ball.
- a plurality of radiating grooves 87 are formed on the upper end surface of the valve barrel 68 at predetermined intervals in the circumferential direction.
- a plurality of radiating grooves 89 are formed on the lower end surface of the push tube 69 at predetermined intervals in the circumferential direction.
- An annular flow path 90 is formed between the lower part of the outer peripheral surface of the push cylinder 69 and the inner peripheral surface of the large-diameter hole 65, and the second detection valve 32 of the second detection valve 32 is formed by a height portion in the middle of the annular flow path 90.
- An outlet 32b is configured. The outlet 32b communicates with the outside air via the outlet hole 91, the discharge passage 61, and the check valve 62 (see FIG. 4A).
- the swivel clamp having the above-described configuration operates as follows.
- the pressure oil in the upper first drive chamber 11 is discharged from the first supply / discharge port P1
- the pressure oil in the second supply / discharge port P2 is in the lower second drive. It is supplied to the chamber 12.
- the piston 10 rises to the upper limit position, and the piston 10 raises the output rod 15 and the clamp arm 16.
- the first detection valve 31 for detecting the lowering shown in FIG. 1A is opened. More specifically, as shown in FIG. 4A, the piston 10 pushes up the first detection rod 41 via the operated portion 49, and the valve surface 55 of the upper pressure receiving portion 47 is separated from the valve seat 54. For this reason, the pressurized air supplied to the first supply port A1 flows to the discharge passage 61 through the first supply passage B1, the inlet 31a, the annular inlet passage 56, the radiation groove 59, and the outlet 31b. The pressurized air in the passage 61 pushes the ball 62b of the check valve 62 open and is discharged to the outside air side.
- the second detection valve 32 for detecting the rise shown in FIG. 1B is closed. More specifically, as shown in FIG. 5A, the piston 10 pushes up the second detection rod 42 via the operated portion 79, and the valve surface 85 of the connecting rod 78 closes the valve hole 84. For this reason, the pressure of 2nd supply port A2 rises to a setting value, and it can confirm that a clamp is an unclamp state by detecting the pressure rise with a sensor.
- the first detection valve 31 for detecting the downward movement and the second detection valve 32 for detecting the upward movement operate as follows.
- the pressurized air supplied to the second supply port A2 passes through the second supply path B2, the valve hole 84, the outlet groove 86, the two radial grooves 87 and 89, the annular flow path 90, and the outlet hole 91.
- Flow to the discharge path 61 (see FIG. 4A).
- the pressurized air in the discharge path 61 pushes the ball 62b of the check valve 62 open and is discharged to the outside air (see FIG. 4A). Thereafter, the piston 10 descends to the lower limit position shown in the solid line diagram of FIG. 5B (and FIG. 3B).
- the first detection valve 31 for detecting the lowering and the second detection valve 32 for detecting the raising operate as follows.
- the piston 10 when the piston 10 is raised, the piston 10 contacts the operated portion 79 of the second detection valve 32 as shown in a two-dot chain diagram of FIG. 5B. Subsequently, as shown in FIG. 5A, when the piston 10 rises to the upper limit position, the piston 10 pushes up the second detection rod 42 to the upper limit position, and the valve surface 85 of the second detection rod 42 becomes the valve hole. It faces 84. For this reason, the second detection valve 32 is fully closed. For this reason, the pressure of the pressurized air at the second supply port A2 rises to a set value, and it can be confirmed that the clamp is in a clamped state by detecting the pressure rise with a sensor.
- the above embodiment can be modified as follows.
- the first detection valve 31 for detecting the lowering is opened by the piston 10 while the piston 10 moves from the lower limit position to the upper limit position, and the piston 10 moves from the upper limit position to a predetermined first stroke. What is necessary is just to comprise so that a valve may be closed when S1 descend
- the second detection valve 32 for detecting the rise is closed by the piston 10 when the piston 10 moves from the lower limit position to the upper limit position or a position near the upper limit position, and the piston 10 is moved to the upper limit position.
- the valve may be configured to be opened when the predetermined second stroke S2 is lowered. Therefore, instead of being fully closed at the upper limit position, the second detection valve 32 may be configured to be fully closed when it rises in the vicinity of the upper limit position.
- the first detection valve 31 and the second detection valve 32 may be arranged parallel to the axis of the piston 10 instead of being arranged obliquely with respect to the axis of the piston 10.
- the two detection valves 31 and 32 are disposed on the right wall portion in plan view of the four wall portions corresponding to the four sides of the upper wall 2 of the housing 1. Then, they may be arranged on the upper wall portion or the lower wall portion in plan view.
- the upper wall 2 may be formed in a square shape instead of being formed in a rectangular shape in plan view.
- a poppet type or a spool type can be arbitrarily selected.
- the output rod 15 only needs to be connected to the piston 10 so as to be able to drive together.
- the output rod 15 may be formed separately from the piston 10 instead of being integrally formed with the piston 10.
- the cylinder device may be configured as a single-acting spring return type instead of the illustrated double-acting type, and may further be configured as a spring lock type and a hydraulic release type.
- the pressurized fluid for driving used in the cylinder device may be a gas body such as compressed air instead of the illustrated pressurized oil.
- the cylinder device of the present invention can also be used in a technical field different from the technical field of clamping. In addition, it is needless to say that various modifications can be made within a range that can be assumed by those skilled in the art.
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Abstract
Description
その従来公報の第5図には、ハウジングにピストンを左右方向へ移動可能に挿入し、そのピストンの左右の移動位置を確認する検出弁を上記ハウジングの左右の端壁にそれぞれ配置し、各検出弁の検出ロッドを上記ピストンによって操作する構造が記載されている。
本発明の目的は、検出弁のメンテナンスが容易なシリンダ装置を提供することにある。
ハウジングの上壁に挿入された出力ロッドの外周側で、当該上壁に、下降検出用の第1検出弁と上昇検出用の第2検出弁との2つの検出弁を配置したので、そのハウジングの下壁をテーブル等の固定台に取付けたり、当該ハウジングの下半部を固定台の取付け穴に挿入した場合などでも、上記2つの検出弁に上側からアクセスすることが可能となる。このため、検出弁のメンテナンスに手間がかからない。
しかも、上記2つの検出弁は、上壁内に設置される際に、その上壁の余剰空間を設置スペースとして利用可能なので、シリンダ装置をコンパクトな状態に維持できる。
従って、検出弁のメンテナンスが容易でコンパクトなシリンダ装置を提供できる。
上記発明によれば、出力ロッドの外周側で上壁に装着された封止部材やスクレーパ等に2つの検出弁が干渉するのを防止することと、ハウジングの半径方向の寸法を小さくすることとを両立できるので、シリンダ装置をコンパクトに造れる。
上記構成によれば、シリンダ装置をさらにコンパクトに造れる。
即ち、下降検出用の前記第1検出弁31は、前記ピストン10が下限位置から上限位置へ移動する途中で当該ピストン10によって開弁されると共に、そのピストン10が前記の上限位置から所定の第1ストロークS1下降したときに閉弁されるように構成し、上昇検出用の前記第2検出弁32は、前記ピストン10が前記の下限位置から前記の上限位置又はその近傍位置へ移動したときに当該ピストン10によって閉弁されると共に、そのピストン10が前記の上限位置から所定の第2ストロークS2下降したときに開弁されるように構成し、その第2ストロークS2の長さを前記第1ストロークS1の長さよりも小さい値に設定する。
上記構成によれば、下降位置と上昇位置とを確実に区分けして検出できる。
即ち、下降検出用の前記第1検出弁31は、前記駆動室11に上側から対面するように前記の上壁2に形成された第1装着孔M1と、その第1装着孔M1に取付けられる第1ケーシングC1と、その第1ケーシングC1に挿入された第1検出ロッド41であって、下受圧部45と当該下受圧部45よりも受圧面積が大きい上受圧部47と前記被操作部49とを有する第1検出ロッド41と、前記の上受圧部47の上側に形成された圧力室51と、その圧力室51を前記駆動室11へ連通させるように前記第1検出ロッド41に形成した貫通孔52と、前記の上受圧部47の下部に形成したポペット形の弁面55と、前記第1検出ロッド41が下降したときに前記弁面55によって閉じられるように前記第1ケーシングC1に形成された弁座54と、を備える。
上記構成によれば、下降検出用の第1検出弁は、簡素な構成で確実に閉弁できる。
即ち、上昇検出用の前記第2検出弁32は、前記駆動室11に上側から対面するように前記の上壁2に形成された第2装着孔M2と、その第2装着孔M2に取付けられる第2ケーシングC2と、その第2ケーシングC2に挿入された第2検出ロッド42であって、下受圧部75と当該下受圧部75よりも受圧面積が大きい上受圧部77と前記被操作部79とを有する第2検出ロッド42と、前記の上受圧部77の上側に形成された圧力室81と、その圧力室81を前記駆動室11へ連通させるように前記第2検出ロッド42に形成した貫通孔82と、その第2検出ロッド42の外周面に形成したスプール形の弁面85と、前記第2検出ロッド42が上昇したときに前記弁面85によって閉じられるように前記第2ケーシングC2に形成した弁孔84と、を備える。
上記構成によれば、上昇検出用の第2検出弁は、簡素な構成で確実に閉弁できる。
この実施形態では、シリンダ装置をワーク固定用の旋回式クランプに適用した場合を例示してある。まず、図1Aから図2Bに基づいて上記の旋回式クランプの全体構造を説明する。
また、上壁2の周方向の4辺に対応する4つの壁部分のうちの平面視で左側の壁部分に、第1駆動室11へ連通される第1給排路21が形成されると共に、第2駆動室12へ連通される第2給排路22が形成される。
さらに、上壁2の上記の左側の壁部分において、フランジ7の前記据付面7aに、第1給排路21へ連通される第1給排ポートP1が開口されると共に、第2給排路22へ連通される第2給排ポートP2が開口される。上記の第1駆動室11及び第2駆動室12には、それぞれ、第1給排ポートP1及び第2給排ポートP2と、第1給排路21及び第2給排路22とを介して、圧油(駆動用の加圧流体)が供給および排出される。
また、上記ピストン10から下ロッド24が下方へ一体に突出され、その下ロッド24が前記の下壁3の支持孔25に移動可能に挿入される。下ロッド24の外周面に3つのガイド溝26が周方向へ所定の間隔をあけて形成される。各ガイド溝26は、周知の構造であって、上下に連ねて形成されたストレートな直進溝26a及び螺旋状の旋回溝26bを備える。支持孔25の周壁の上部には3つの横孔27が周方向へ所定の間隔をあけて形成され、各横孔27に挿入されたボール28がガイド溝26に嵌合している。上記の複数のボール28の外周にリング29が回転自在に外嵌めされる。
また、上記の右側の壁部分において、フランジ7の下面に形成した据付面7aには、検出用の加圧エアを供給するように、第1供給ポートA1と第2供給ポートA2とが開口される。第1供給ポートA1及び第2供給ポートA2は、それぞれ、第1供給路B1及び第2供給路B2を介して、前記第1検出弁31及び第2検出弁32の各入口31a,32aに連通される。
まず、下降検出用の第1検出弁31について、主として図4A及び図4Bに基づいて説明する。図4Aは、前記図1Aの部分拡大図である。図4Bは、前記図3Aの部分拡大図である。
第1装着孔M1に取付けられる第1ケーシングC1は、大径孔35の下部に装着された弁筒38と、メネジ孔34に螺合された押筒39とを備える。その押筒39が弁筒38を大径孔35の底部に押し付けている。
下受圧部45の下端部には、前記ピストン10に接当可能な被操作部49が設けられる。上受圧部47の上側に圧力室51が形成される。その圧力室51は、前記第1検出ロッド41の軸心に沿って形成した貫通孔52を介して、前記第1駆動室11へ連通される。
上記第2検出弁32は、図5A及び図5Bに示すように、前記の第1検出弁31とほぼ同様に次のように構成されている。
第2装着孔M2に取付けられる第2ケーシングC2は、大径孔65の下部に装着された弁筒68と、メネジ孔64に螺合された押筒69とを備える。その押筒69が弁筒68を大径孔65の底部に押し付けている。
下受圧部75の下端部には、前記ピストン10に接当可能な被操作部79が設けられる。上受圧部77の上側に圧力室81が形成される。その圧力室81は、前記第2検出ロッド42の軸心に沿って形成した貫通孔82を介して、前記第1駆動室11へ連通される。
前記の弁孔84の内端部によって第2検出弁32の入口32aが構成される。その入口32aは、前記の第2供給路B2を介して第2供給ポートA2へ連通される。なお、参照数字88はプラグ用のボールである。
図1A及び図1Bのアンクランプ状態では、上側の第1駆動室11の圧油が第1給排ポートP1から排出されると共に、第2給排ポートP2の圧油が下側の第2駆動室12へ供給される。これにより、ピストン10が上限位置へ上昇し、そのピストン10が出力ロッド15及びクランプアーム16を上昇させている。
引き続いて、図5Bの二点鎖線図に示すように、ピストン10が第2ストロークS2だけ下降したときに、連結ロッド78の環状の出口溝86が弁孔84に対面して、第2検出弁32が全開される。このため、第2供給ポートA2へ供給された加圧エアは、第2供給路B2と弁孔84と出口溝86と2つの放射溝87,89と環状流路90と出口孔91とを通って前記排出路61(図4Aを参照)へ流れる。その排出路61の加圧エアが逆止弁62のボール62bを押し開いて外気へ排出される(図4Aを参照)。
その後、上記ピストン10は、図5Bの実線図(及び図3B)に示す下限位置へ下降していく。
その後、上記ピストン10は、図4Bの実線図(及び図3A)に示す下限位置へ下降していく。
なお、上記クランプ状態では、図5Bの第2検出ロッド42が第1駆動室11内へ突出する長さは、図4Bの第1検出ロッド41が第1駆動室11内へ突出する長さよりも小さくなっている。
下降検出用の前記第1検出弁31は、前記ピストン10が下限位置から上限位置へ移動する途中で当該ピストン10によって開弁されると共に、そのピストン10が前記の上限位置から所定の第1ストロークS1下降したときに閉弁されるように構成すればよい。従って、その第1検出弁31は、ピストン10が上限位置からクランプストローク領域(前記の直進溝26aのストローク領域に相当する領域)に下降したときに全閉される場合や、当該ピストン10が上限位置から上記クランプストローク領域の近傍に下降したときに全閉される場合などが考えられる。
また、上昇検出用の前記第2検出弁32は、前記ピストン10が下限位置から上限位置又はその近傍位置へ移動したときに当該ピストン10によって閉弁されると共に、そのピストン10が前記の上限位置から所定の第2ストロークS2下降したときに開弁されるように構成すればよい。従って、その第2検出弁32は、上限位置で全閉されることに代えて、上限位置の近傍に上昇したときに全閉されるように構成してもよい。
また、上記2つの検出弁31,32の設置箇所は、ハウジング1の上壁2の4辺に対応する4つの壁部分のうちの平面視で右側の壁部分に配置するとしたが、これに代えて、平面視で上側の壁部分や下側の壁部分に配置してもよい。その上壁2は、平面視で長方形状に形成することに代えて正方形状に形成してもよい。
上記の各検出弁31,32の弁構造は、ポペット形とスプール形とのいずれかの構造を任意に選択可能である。
出力ロッド15は、ピストン10に同行駆動可能に連結されておればよく、そのピストン10と一体に形成することに代えて、当該ピストン10とは別体に形成してもよい。
また、本発明のシリンダ装置は、クランプの技術分野とは異なる技術分野に利用することも可能である。
その他に、当業者が想定できる範囲で種々の変更を行えることは勿論である。
Claims (7)
- ハウジング(1)内に昇降可能に挿入されたピストン(10)と、
そのピストン(10)の上側に配置されると共に駆動用の加圧流体が供給および排出される駆動室(11)と、
前記ピストン(10)に連結されると共に前記ハウジング(1)の上壁(2)に挿入された出力ロッド(15)と、
その出力ロッド(15)の外周側で前記の上壁(2)に周方向へ所定の間隔をあけて配置された下降検出用の第1検出弁(31)及び上昇検出用の第2検出弁(32)であって、前記ピストン(10)に上側から対面される被操作部(49)(79)を有する第1検出弁(31)及び第2検出弁(32)と、
前記第1検出弁(31)及び第2検出弁(32)の各入口(31a)(32a)に検出用の加圧エアを供給する第1供給路(B1)及び第2供給路(B2)と、
を備えることを特徴とするシリンダ装置。 - 請求項1のシリンダ装置において、
前記第1検出弁(31)及び第2検出弁(32)の各軸心を、下方へ向かうにつれて前記ピストン(10)の軸心に近づくように傾斜させ、その傾斜角度を5度から15度の範囲内に設定した、シリンダ装置。 - 請求項1のシリンダ装置において、
前記の上壁(2)を平面視で長方形状または正方形状に形成し、その上壁(2)の周方向の4辺に対応する4つの壁部分のうちのいずれかの壁部分に、前記駆動室(11)へ連通される給排路(21)を形成し、
前記4つの壁部分のうちの前記給排路(21)を形成した壁部分を除いた壁部分のいずれかに、前記第1検出弁(31)及び第2検出弁(32)を設けた、シリンダ装置。 - 請求項3のシリンダ装置において、
前記の上壁(2)は取付け用のフランジ(7)を有し、そのフランジ(7)の外周部の下面に形成した据付面(7a)に、前記給排路(21)へ連通される給排ポート(P1)を開口させた、シリンダ装置。 - 請求項1から4のいずれかのシリンダ装置において、
下降検出用の前記第1検出弁(31)は、前記ピストン(10)が下限位置から上限位置へ移動する途中で当該ピストン(10)によって開弁されると共に、そのピストン(10)が前記の上限位置から所定の第1ストローク(S1)下降したときに閉弁されるように構成し、
上昇検出用の前記第2検出弁(32)は、前記ピストン(10)が前記の下限位置から前記の上限位置又はその近傍位置へ移動したときに当該ピストン(10)によって閉弁されると共に、そのピストン(10)が前記の上限位置から所定の第2ストローク(S2)下降したときに開弁されるように構成し、その第2ストローク(S2)の長さを前記第1ストローク(S1)の長さよりも小さい値に設定した、シリンダ装置。 - 請求項5のシリンダ装置において、
下降検出用の前記第1検出弁(31)は、前記駆動室(11)に上側から対面するように前記の上壁(2)に形成された第1装着孔(M1)と、その第1装着孔(M1)に取付けられる第1ケーシング(C1)と、その第1ケーシング(C1)に挿入された第1検出ロッド(41)であって、下受圧部(45)と当該下受圧部(45)よりも受圧面積が大きい上受圧部(47)と前記被操作部(49)とを有する第1検出ロッド(41)と、前記の上受圧部(47)の上側に形成された圧力室(51)と、その圧力室(51)を前記駆動室(11)へ連通させるように前記第1検出ロッド(41)に形成した貫通孔(52)と、前記の上受圧部(47)の下部に形成したポペット形の弁面(55)と、前記第1検出ロッド(41)が下降したときに前記弁面(55)によって閉じられるように前記第1ケーシング(C1)に形成された弁座(54)と、を備えるシリンダ装置。 - 請求項5のシリンダ装置において、
上昇検出用の前記第2検出弁(32)は、前記駆動室(11)に上側から対面するように前記の上壁(2)に形成された第2装着孔(M2)と、その第2装着孔(M2)に取付けられる第2ケーシング(C2)と、その第2ケーシング(C2)に挿入された第2検出ロッド(42)であって、下受圧部(75)と当該下受圧部(75)よりも受圧面積が大きい上受圧部(77)と前記被操作部(79)とを有する第2検出ロッド(42)と、前記の上受圧部(77)の上側に形成された圧力室(81)と、その圧力室(81)を前記駆動室(11)へ連通させるように前記第2検出ロッド(42)に形成した貫通孔(82)と、その第2検出ロッド(42)の外周面に形成したスプール形の弁面(85)と、前記第2検出ロッド(42)が上昇したときに前記弁面(85)によって閉じられるように前記第2ケーシング(C2)に形成した弁孔(84)と、を備えるシリンダ装置。
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JP2000170713A (ja) * | 1998-12-09 | 2000-06-20 | Kubota Corp | 位置検出装置付シリンダー |
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2012
- 2012-12-28 JP JP2012289509A patent/JP6076735B2/ja active Active
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2013
- 2013-12-25 KR KR1020157013228A patent/KR102082539B1/ko active IP Right Grant
- 2013-12-25 WO PCT/JP2013/084734 patent/WO2014104123A1/ja active Application Filing
- 2013-12-25 EP EP13867400.7A patent/EP2940316A4/en not_active Withdrawn
- 2013-12-25 US US14/649,955 patent/US10018191B2/en not_active Expired - Fee Related
- 2013-12-25 CN CN201380068239.6A patent/CN104903597B/zh not_active Expired - Fee Related
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JPH09257005A (ja) * | 1996-03-21 | 1997-09-30 | Sanko:Kk | シリンダ装置の駆動限の検出装置 |
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See also references of EP2940316A4 |
Also Published As
Publication number | Publication date |
---|---|
EP2940316A1 (en) | 2015-11-04 |
US10018191B2 (en) | 2018-07-10 |
CN104903597A (zh) | 2015-09-09 |
KR20150102955A (ko) | 2015-09-09 |
KR102082539B1 (ko) | 2020-02-27 |
CN104903597B (zh) | 2017-06-23 |
JP6076735B2 (ja) | 2017-02-08 |
US20150308423A1 (en) | 2015-10-29 |
JP2014129864A (ja) | 2014-07-10 |
EP2940316A4 (en) | 2016-08-31 |
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