WO2011007589A1 - 圧力スイッチ - Google Patents
圧力スイッチ Download PDFInfo
- Publication number
- WO2011007589A1 WO2011007589A1 PCT/JP2010/051714 JP2010051714W WO2011007589A1 WO 2011007589 A1 WO2011007589 A1 WO 2011007589A1 JP 2010051714 W JP2010051714 W JP 2010051714W WO 2011007589 A1 WO2011007589 A1 WO 2011007589A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- piston
- pressure switch
- display wall
- case
- Prior art date
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0089—Transmitting or indicating the displacement of pistons by electrical, electromechanical, magnetic or electromagnetic means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/26—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/34—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by diaphragm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/26—Details
- H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure
- H01H35/2614—Means for adjustment of "ON" or "OFF" operating pressure by varying the bias on the pressure sensitive element
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/38—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by piston and cylinder
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/9401—Calibration techniques
- H03K2217/94015—Mechanical, e.g. by displacement of a body, a shielding element, or a magnet, in or out of the sensing area
Definitions
- the present invention relates to a pressure switch that detects a fluid pressure by detecting a piston driven by a fluid thrust against an urging force.
- a switch is provided.
- a pressure switch for example, as described in Patent Document 1, there is a piston type pressure switch having a piston driven by a thrust of a fluid flowing in from a flow path. The piston is biased with a spring force in a direction against the thrust of the fluid, and the operating pressure value of the pressure switch is set by the spring force. When the piston is driven against this spring force, the magnetic field of the permanent magnet attached to the piston is detected by the magnetic sensor, and the fluid pressure in the flow path with respect to the operating pressure value is detected. .
- Such a pressure switch can adjust the operating pressure value of the pressure switch by changing the spring force that urges the piston so that the pressure switch can be used for various fluid pressures.
- a pressing member is accommodated so as to be movable in the sliding direction of the piston, and a spring member is mounted between the piston and the pressing member.
- the pressing member is screwed to a screw member that is rotatably attached to the case, and the pressing member is moved in the sliding direction of the piston by operating the screw member. Thereby, the distance between the piston and the pressing member is changed, the spring force of the spring member is changed, and the operating pressure value of the pressure switch is adjusted.
- the case is formed with a pressure display wall having a window portion that allows the display portion provided on the pressing member to be visually recognized from the outside of the case.
- the pressure display wall is provided with a scale of a detectable range of the pressure switch along the window portion, and is pointed according to the position of the display portion by visually checking the display portion of the pressing member through the window portion. The operating pressure value is displayed on the scale.
- a screw member is directly screw-coupled to the pressing member. Therefore, the screw member is arranged with its axial direction facing the sliding direction of the piston, and the screw member is rotatably attached to a cap provided on one end side in the sliding direction of the piston in the case.
- the pressure display wall is formed on the side perpendicular to the sliding direction of the piston in the case so that the display unit moves along the window as the pressing member moves. That is, the screw member is attached to the side orthogonal to the pressure display wall.
- An object of the present invention is to improve workability when adjusting the operating pressure value.
- the pressure switch according to the present invention includes a case having a cylinder hole communicating with a flow path to which a fluid is supplied, a movably accommodated in the cylinder hole, and a pressure chamber is defined in the cylinder hole. Whether the piston is at the pressure detection position is detected according to the position of a piston that moves backward by the fluid flowing into the pressure chamber from the passage and the permanent magnet that is attached to the case and provided on the piston.
- An adjustment member; and an operation member that is provided on the pressure display wall side and sets the biasing force when the adjustment member is moved to move the piston to the pressure detection position, and the window portion is provided. Further, the operation member is provided on the pressure display wall side.
- the drive-side inclined surface of the adjustment member is formed in an opposite direction with respect to the pressure display wall side, and the adjustment member is moved in a direction away from the pressure display wall.
- the pressing member is moved to the piston side.
- the driving member inclined surface of the adjusting member is formed to face the pressure display wall, and the pressing member is moved in a direction approaching the pressure display wall. It is moved to the piston side.
- the pressure switch of the present invention is characterized in that a portion of the pressure display wall where the operation portion of the operation member is provided and a portion where the window portion is provided are on the same plane.
- the pressure switch according to the present invention is characterized in that a portion of the pressure display wall where the operation portion of the operation member is provided and a portion where the window portion is provided are shifted in the moving direction of the adjustment member.
- the operating member since the operating member is provided on the pressure display wall side provided with the window portion, the operating pressure value can be easily operated by operating the adjusting member while checking the operating pressure value on the pressure display wall. Can be adjusted. Thereby, workability in setting the operating pressure value can be improved. In addition, it is not necessary to secure a sufficient space for inserting a jig for operating the operation member outside the case on the side orthogonal to the pressure display wall, and the installation space including the adjustment work of the pressure switch is reduced. be able to.
- FIG. It is a perspective view which shows the pressure switch which is one embodiment of this invention.
- (A), (B) is the front view and sectional drawing of a pressure switch shown in FIG. It is sectional drawing which shows operation
- (A), (B) is the front view and sectional drawing of a pressure switch which adjusted the operating pressure value from the state shown in FIG. It is sectional drawing which shows the modification of the pressure switch shown in FIG. It is a perspective view which shows the pressure switch which is other embodiment of this invention.
- the pressure switch 11 is provided in a fluid pressure circuit that supplies fluid from a fluid pressure source to a fluid pressure device such as an actuator, and is used to detect the fluid pressure in the flow path.
- the pressure switch 11 has a rectangular parallelepiped case 12 made of a nonmagnetic material such as an aluminum alloy.
- the case 12 includes a case main body including a rectangular bottom wall 13 and a front wall 14a, a rear wall 14b, and left and right side walls 14c formed integrally therewith, and a closing wall 16 that closes an opening of the case main body. And a cover.
- the pressure switch 11 is disposed with the bottom wall 13 side facing the flow path side of the fluid pressure circuit, and is attached to the fluid pressure circuit via an attachment member (not shown).
- the front wall 14 a of the case 12 is a pressure display wall 17.
- a cylindrical cylinder wall 18 formed integrally with the bottom wall 13 is disposed in the case 12 at a substantially central position in the longitudinal direction of the pressure display wall 17 toward the closing wall 16 side. It extends to.
- a cylinder hole 19 that opens toward the closing wall 16 is formed inside the cylinder wall 18, and the cylinder hole 19 is communicated with the flow path of the fluid pressure circuit through a communication port 20 formed in the bottom wall 13. It has become so.
- the piston 21 is accommodated in the cylinder hole 19 so as to be movable in the axial direction of the cylinder hole 19.
- a piston seal 22 slidably in contact with the inner surface of the cylinder hole 19 is attached to the annular groove 21 a formed in the piston 21, and the pressure chamber 23 is formed in an airtight manner on the bottom wall 13 side of the cylinder hole 19 by the piston 21. ing.
- the pressure chamber 23 communicates with the flow path via the communication port 20, and a thrust is applied to the piston 21 toward the closing wall 16 by the fluid flowing into the pressure chamber 23 from the flow path.
- the piston 21 is provided with a permanent magnet 24 as a detected body.
- the pressing member 25 is accommodated inside the case 12 so as to be positioned closer to the closing wall 16 than the cylinder wall 18.
- a coil spring 26 as an elastic member is mounted between the pressing member 25 and the piston 21 so that the axial direction thereof is directed to the sliding direction of the piston 21, and the piston 21 is moved toward the pressure chamber 23 by the coil spring 26. It is energized. That is, thrust is applied to the piston 21 toward the pressing member 25 by the pressure fluid flowing into the pressure chamber 23 against the biasing force of the coil spring 26 provided in the pressing member 25. When thrust by pressure fluid is not applied to the piston 21, the piston 21 is moved forward to the pressure chamber 23 side by the biasing force of the coil spring 26 to reach the forward limit position shown in FIG.
- a magnetic field of the permanent magnet 24 attached to the piston 21 is provided inside the case 12.
- the magnetic sensor 27 for example, an MR element (magnetoresistive element) or a Hall element is used, and it is detected that the permanent magnet 24 mounted on the piston 21 has approached the magnetic sensor 27.
- the magnetic sensor 27 is accommodated in a sensor accommodating chamber 12a partitioned on the back wall 14b side inside the case 12 by a partition wall 28 formed integrally with the cylinder wall 18.
- the sensor element 27 a of the magnetic sensor 27 is disposed adjacent to the pressing member 25 side of the cylinder wall 18 in correspondence with the pressure detection position of the piston 21.
- the magnetic sensor 27 is connected to the control device of the fluid pressure circuit by a cable 27 b extending to the outside of the case 12 through the through hole 16 a of the blocking wall 16.
- the magnetic field of the permanent magnet 24 mounted on the piston 21 is detected by the magnetic sensor 27, so that the piston 21 moves backward toward the pressing member 25 against the biasing force of the coil spring 26 due to the pressure in the pressure chamber 23. It is detected that the piston 21 is at the pressure detection position by being moved.
- the pressure switch 11 detects that the pressure in the pressure chamber 23 has reached the operating pressure value set by the biasing force of the coil spring 26, and the drive control of the fluid pressure source and fluid pressure device is based on the signal. Etc. are performed.
- the sensor element 27a of the magnetic sensor 27 is arranged corresponding to the pressure detection position of the piston 21, and the piston 21 is pressurized by switching the output of the magnetic sensor 27 from the OFF state to the ON state.
- the detection position is detected, the present invention is not limited to this.
- the sensor element 27a of the magnetic sensor 27 is arranged corresponding to the forward limit position of the piston 21, and the output of the magnetic sensor 27 is switched from the ON state to the OFF state so that the piston 21 is at the pressure detection position. You may make it detect. That is, in this case, the piston 21 is moved backward toward the pressing member 25 against the biasing force of the coil spring 26 by the pressure in the pressure chamber 23, and the permanent magnet 24 mounted on the piston 21 is moved to the magnetic sensor 27.
- the magnetic sensor 27 detects that the magnetic field of the permanent magnet 24 is not detected and the piston 21 is detected to be at the pressure detection position.
- the pressure switch 11 adjusts the operating pressure value of the pressure switch 11 set by the biasing force of the coil spring 26 so that the pressure switch 11 can be used in various fluid pressure circuits having different working pressure values of the fluid pressure device. It is possible.
- the pressing member 25 faces the piston 21 and is movable in the sliding direction of the piston 21 and is accommodated in the case 12. By moving the pressing member 25 in the sliding direction of the piston 21, the distance between the pressing member 25 and the piston 21 is changed, and the biasing force of the coil spring 26 that biases the piston 21 toward the pressure chamber 23 is changed. . Thereby, the operating pressure value of the pressure switch 11 set by the biasing force of the coil spring 26 is adjusted.
- the pressing member 25 includes a display portion 25a formed by bending from an end portion on the pressure display wall 17 side toward the bottom wall 13 side.
- the display unit 25a extends in the longitudinal direction of the pressure display wall 17 in the vicinity of the pressure display wall 17, and moves together with the pressing member 25 in the sliding direction of the piston 21, that is, in the longitudinal direction of the pressure display wall 17. It has become.
- the surface of the display unit 25a on the pressure display wall 17 side is painted in a color such as red or blue.
- a driven side inclined surface 25c facing the pressure display wall 17 side is inclined toward the pressure display wall 17 side toward the piston 21 side. Is formed.
- the pressure display wall 17 has a window portion 31 with a transparent cover 30 attached so that the inside of the case 12 can be visually recognized. Is formed.
- a scale of 0.1 to 0.4 (MPa) is given every 0.1 so that the numerical value of the scale increases from the closed wall 16 side toward the bottom wall 13 side. .
- the operating pressure value of the pressure switch 11 is externally indicated by a scale pointed according to the position of the end face on the bottom wall 13 side of the display part 25a. It is displayed.
- the settable range of the operating pressure value of the pressure switch 11 can be arbitrarily set by replacing with a coil spring having a different spring constant.
- a cylindrical adjustment member 33 is accommodated inside the case 12.
- the adjusting member 33 is adjacent to the pressed portion 25b of the pressing member 25 on the pressure display wall 17 side, and is movable in a direction orthogonal to the sliding direction of the piston 21, that is, a direction approaching and moving away from the pressure display wall 17. It is arranged.
- a drive-side inclined surface 33a that is in sliding contact with the driven-side inclined surface 25c of the pressing member 25 is formed so as to be inclined toward the pressure display wall 17 side toward the piston 21 side.
- a screw member 34 is attached as an operation member for setting the biasing force of the coil spring 26 when the adjustment member 33 is moved and the piston 21 reaches the pressure detection position.
- the shaft of the screw member 34 is arranged coaxially with the adjustment member 33 and is rotatably supported by a fixing member 35 that is abutted against the inner surface of the pressure display wall 17 and formed integrally with the screw member 34.
- the head portion 34a of the screw member 34 is inserted into a through hole 17a formed in the pressure display wall 17, and as shown in FIG. 2 (A), outside the case 12 on the same side as the window portion 31. Facing.
- the portion of the pressure display wall 17 where the head portion 34a of the screw member 34 is provided and the portion where the window portion 31 is provided are formed on the same plane.
- a nut member 36 is screwed to the male screw portion 34b of the screw member 34.
- the cylindrical adjustment member 33 is abutted against the end surface of the nut member 36 on the back wall 14b side in a state where the male screw portion 34b of the screw member 34 is rotatably inserted therein.
- a jig such as a minus driver
- the screw member When adjusting the operating pressure value of the pressure switch 11, the screw member is checked while confirming the operating pressure value of the pressure switch 11 by visually checking the display portion 25 a of the pressing member 25 through the window portion 31 of the pressure display wall 17.
- a jig is fitted to the head portion 34a of 34, and the screw member 34 is rotated.
- the screw member 34 is rotated counterclockwise as shown in FIG. It moves to the direction away from the display wall 17, and presses the press member 25 to the piston 21 side via the inclined surfaces 25c and 33a. Thereby, the biasing force of the coil spring 26 that biases the piston 21 toward the pressure chamber 23 is increased, and the operating pressure value of the pressure switch 11 is adjusted to be increased.
- the display portion 25 a of the pressing member 25 moves along the window portion 31 toward the bottom wall 13.
- the operating pressure value of the pressure switch 11 is reduced to 0.25 MPa by rotating the screw member 34 until the scale indicated according to the position of the end face on the bottom wall 13 side of the display portion 25a becomes 0.25 MPa. Can be set.
- the adjustment member 33 is moved in a direction approaching the pressure display wall 17 so that the operating pressure value of the pressure switch 11 is adjusted to be small. It has become.
- the screw member 34 for adjusting the operating pressure value is attached to the pressure display wall 17 for displaying the operating pressure value of the pressure switch 11, the display portion 25 a of the pressing member 25 is provided via the window portion 31.
- the operating pressure value of the pressure switch 11 can be easily adjusted by rotating the screw member 34 while visually confirming the operating pressure value of the pressure switch 11. Thereby, workability
- the screw member is attached to the cap provided on the side orthogonal to the pressure display wall as in the conventional case, the pressure display wall side is provided outside the case in order to make the display of the operating pressure value visible.
- a sufficient space is required, and a sufficient space is also required outside the case on the cap side in order to insert the jig into the screw member.
- the head portion 34a of the screw member 34 on the pressure display wall 17 as in the present invention, it is not necessary to secure a sufficient space outside the case 12 on the closed wall 16 side, and the pressure switch 11 is installed. Space can be reduced.
- FIG. 5 is a cross-sectional view showing a modified example of the pressure switch shown in FIG. 2.
- members similar to those shown in FIG. 1 are similar to those shown in FIG.
- the pressure switch 40 shown in FIG. 5 detects the position of the piston 21 driven by the thrust of the pressure fluid against the biasing force of the coil spring 26, thereby detecting the fluid pressure in the flow path.
- the pressing member 41 is housed in the case 12 so as to be movable in the sliding direction of the piston 21 and includes a coil spring 26 that biases the piston 21 toward the pressure chamber 23.
- the operating pressure value of the pressure switch 40 is adjusted by moving the pressing member 41 in the sliding direction of the piston 21.
- the pressing member 41 includes a display portion 41a formed to extend from the end portion on the pressure display wall 17 side to the bottom wall 13 side. By visually recognizing the display part 41a through the window part 31, the operating pressure value of the pressure switch 40 is displayed outside by a scale pointed according to the position of the end face of the display part 41a on the bottom wall 13 side. It has become.
- a notch 41c that opens to the closing wall 16 side is formed in the pressed portion 41b provided on the closing wall 16 side of the pressing member 41.
- the pressing member 41 and the screw member 34 do not interfere with each other when the pressing member 41 moves.
- a driven side inclined surface 41d facing the back wall 14b side is formed in the pressed portion 41b of the pressing member 41 so as to incline toward the back wall 14b side toward the piston 21 side.
- the adjusting member 42 is adjacent to the pressed portion 41b of the pressing member 41 on the back wall 14b side, and is movable in a direction orthogonal to the sliding direction of the piston 21, that is, in a direction approaching and separating from the pressure display wall 17. It is arranged.
- a drive-side inclined surface 42a that is in sliding contact with the driven-side inclined surface 41d of the pressing member 41 is formed to be inclined toward the back wall 14b as it goes toward the piston 21 side.
- a pressing force toward the piston 21 is applied from the adjusting member 42 to the pressing member 41 via the inclined surfaces 41d and 42a.
- the cylindrical adjustment member 42 has a male screw part 34b of the screw member 34 inserted therein so as to be movable, and is attached to an end surface of the nut member 36 screwed to the tip of the male screw part 34b on the pressure display wall 17 side. It has been hit.
- a jig such as a minus driver
- the adjustment member 42 moves in a direction orthogonal to the sliding direction of the piston 21 together with the nut member 36. Is done. Thereby, the operating pressure value of the pressure switch 40 is adjusted.
- the drive-side inclined surface 42a of the adjustment member 42 is formed to face the pressure display wall 17 side, and the adjustment member 42 is moved in a direction approaching the pressure display wall 17.
- the pressing member 41 is moved to the piston 21 side.
- the pressure switch 40 can achieve the same effects as the pressure switch 11 described above.
- FIG. 6 is a perspective view showing a pressure switch according to another embodiment of the present invention
- FIGS. 7A and 7B are a front view and a sectional view of the pressure switch shown in FIG. 6 and 7, members similar to those shown in FIGS. 1 and 2 are denoted by the same reference numerals and description thereof is omitted.
- the pressure switch 50 shown in FIG. 6 has substantially the same internal structure as the pressure switch 11 shown in FIG. 2, and the position of the piston 21 that is driven by the thrust of the pressure fluid against the biasing force of the coil spring 26. It is a piston type pressure switch that detects the fluid pressure in the flow path by detecting it.
- a substantially rectangular parallelepiped case 51 made of a nonmagnetic material such as an aluminum alloy has a stepped shape partially cut away on the closing wall 16 side, and is formed by a front wall 14a.
- the pressure display wall 17 is provided with a window portion 31 on the bottom wall 13 side and a screw member 34 on the closing wall 16 side.
- the portion of the pressure display wall 17 where the head portion 34a of the screw member 34 is provided is shifted to the back wall 14b side relative to the portion where the window portion 31 is provided, and these are shifted from each other in the moving direction of the adjusting member 33. It is formed facing the same side.
- mounting screws 54 are provided toward the bottom wall 13 side at one corner of the bottom wall 13. Further, a stepped portion 55 is formed on the back wall 14 b side of the case 51 at a diagonal position with respect to the mounting screw 54, and the mounting screw 56 is provided on the stepped portion 55 toward the bottom wall 13 side. .
- These mounting screws 54 and 56 allow the pressure switch 50 to be attached to the fluid pressure circuit with the bottom wall 13 side facing the flow path side of the fluid pressure circuit.
- the display portion 25, the window portion 31, and the magnetic sensor 27 of the pressing member 25 are provided to be shifted to the other diagonal position side of the bottom wall 13 so as not to interfere with the mounting screws 54 and 56.
- the portion of the pressure display wall 17 where the head portion 34a of the screw member 34 is provided and the portion where the window portion 31 is provided are shifted from each other in the moving direction of the adjustment member 33.
- the head part 34a of the screw member 34 and the window part 31 face the same side.
- the pressure switch 50 can achieve the same effects as the pressure switch 11 described above.
- the pressure switch 50 of the present embodiment by providing the stepped portions 53 and 55 on the pressure display wall 17 and the back wall 14b side, the mounting members 54 and 56 are fastened by the mounting screws 54 and 56 fastened to the stepped portions 53 and 55. It is possible to directly fix the pressure switch 50 to the fluid pressure circuit without going through. Thereby, workability at the time of fixing the pressure switch 50 to the fluid pressure circuit is improved.
- the internal structure is substantially the same as that of the pressure switch 11, but may be the same internal structure as that of the pressure switch 40.
- FIGS. 8A and 8B are perspective views of a pressure switch according to another embodiment of the present invention as seen from the front side and the back side.
- the same members as those shown in FIG. The members are denoted by the same reference numerals and description thereof is omitted.
- the pressure switch 60 shown in FIG. 8 has the same internal structure as the pressure switch 11 shown in FIG. 2 or the pressure switch 40 shown in FIG. 5, and is driven by the thrust of the pressure fluid against the biasing force of the coil spring 26.
- This is a piston-type pressure switch that detects the fluid pressure in the flow path by detecting the position of the piston 21 to be operated.
- a substantially rectangular parallelepiped case 61 formed of a nonmagnetic material such as an aluminum alloy is partially cut off on the closing side 16 side, like the case 51 of the pressure switch 50 shown in FIG. 6.
- the portion of the pressure display wall 17 on the closed wall 16 side where the head portion 34a of the screw member 34 is provided is closer to the back wall 14b than the portion on the bottom wall 13 side where the window portion 31 is provided. It is formed to be shifted.
- the sensor housing chamber 12a into which the magnetic sensor 62 is incorporated is not defined in the case 61, and a sensor groove 63 in which the magnetic sensor 62 is detachably attached is formed on the back wall 14b side of the case 61.
- the sensor groove 63 is formed along the longitudinal direction of the back wall 14 b so as not to interfere with the mounting screw 56, and opens to both longitudinal ends of the sensor groove 63 and the back side of the case 61.
- a pair of fitting projections 64 projecting inward in the width direction of the sensor groove 63 are provided integrally with the case 61 in the opening on the back side of the sensor groove 63.
- the magnetic sensor 62 includes a fitting portion 62 a formed in a shape that can be fitted into the sensor groove 63.
- the fitting portion 62 a of the magnetic sensor 62 is inserted into the sensor groove 63 from the opening on both ends in the longitudinal direction of the sensor groove 63, and the fitting protrusion 64 prevents the sensor groove 63 from coming off from the opening on the back side.
- the sensor groove 63 is fitted in the sensor groove 63 so as to be movable along the longitudinal direction of the sensor groove 63.
- the magnetic sensor 62 is fixed in the sensor groove 63 by the fixing screw 65 so that the sensor element of the magnetic sensor 62 is adjacent to the pressing member 25 side of the cylinder wall 18 corresponding to the pressure detection position of the piston 21. Yes.
- the magnetic sensor 62 is connected to a fluid pressure circuit control device by a cable 62b extending to the back side of the case 61.
- the magnetic sensor 62 is attached to the sensor groove 63 formed on the outer surface of the case 61. Therefore, the magnetic sensor 62 is compared with the case where the magnetic sensor 62 is incorporated in the case 61. 62 can be easily attached and detached. Thereby, workability at the time of attaching and detaching the magnetic sensor 62 is improved. Needless to say, the pressure switch 60 of the present embodiment can achieve the same effects as the pressure switch 11 described above.
- the present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the invention.
- the pressure display wall 17 is graduated so that the bottom wall 13 side is on the lower side, but the present invention is not limited to this, and the arrangement of the pressure switches 11, 40, and 50 is Is optional.
- the pressure switch is used to detect that the pressure in the pneumatic circuit is a predetermined set pressure, and to control a pneumatic actuator such as a pneumatic cylinder based on the detection signal.
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims (5)
- 流体が供給される流路に連通するシリンダ孔を備えたケースと、
前記シリンダ孔内に移動自在に収容されて当該シリンダ孔内に圧力室を区画形成し、前記流路から前記圧力室に流入する流体により後退移動するピストンと、
前記ケースに装着され、前記ピストンに設けられた永久磁石の位置に応じて、前記ピストンが圧力検出位置であるか否かを検出する磁気センサと、
前記ケース内に前記ピストンに対向して移動自在に配置され、前記ピストンとの間に装着される弾性部材による前記ピストンに対する付勢力により前記ピストンが前記圧力検出位置となるときの前記圧力室内の流体の圧力を設定する押圧部材と、
前記押圧部材に設けられ、前記ケースの圧力表示壁に設けられた窓部を介して設定された圧力を外部に表示する表示部と、
前記押圧部材に形成された従動側傾斜面に摺動接触する駆動側傾斜面を備え、前記押圧部材の移動方向と交差する方向に移動して前記押圧部材を移動させる調節部材と、
前記圧力表示壁側に設けられ、前記調節部材を移動させて前記ピストンが前記圧力検出位置となるときの前記付勢力を設定する操作部材とを有し、
前記窓部が設けられた前記圧力表示壁側に前記操作部材を設けることを特徴とする圧力スイッチ。 - 請求項1記載の圧力スイッチにおいて、前記調節部材の前記駆動側傾斜面を前記圧力表示壁側に対して反対向きに形成し、前記調節部材を前記圧力表示壁から離反する方向へ移動させることにより、前記押圧部材が前記ピストン側へ移動されることを特徴とする圧力スイッチ。
- 請求項1記載の圧力スイッチにおいて、前記調節部材の前記駆動側傾斜面を前記圧力表示壁に対向させて形成し、前記調節部材を前記圧力表示壁に接近する方向へ移動させることにより、前記押圧部材が前記ピストン側へ移動されることを特徴とする圧力スイッチ。
- 請求項1~3のいずれか1項に記載の圧力スイッチにおいて、前記圧力表示壁のうち前記操作部材の操作部が設けられる部分と前記窓部が設けられる部分とを同一平面上とすることを特徴とする圧力スイッチ。
- 請求項1~3のいずれか1項に記載の圧力スイッチにおいて、前記圧力表示壁のうち前記操作部材の操作部が設けられる部分と前記窓部が設けられる部分とを前記調節部材の移動方向にずらすことを特徴とする圧力スイッチ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010800308597A CN102473550B (zh) | 2009-07-17 | 2010-02-05 | 压力开关 |
KR1020117031223A KR101209375B1 (ko) | 2009-07-17 | 2010-02-05 | 압력 스위치 |
EP10799653.0A EP2455958B1 (en) | 2009-07-17 | 2010-02-05 | Pressure switch |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2009-168669 | 2009-07-17 | ||
JP2009168669A JP5017323B2 (ja) | 2009-07-17 | 2009-07-17 | 圧力スイッチ |
Publications (1)
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WO2011007589A1 true WO2011007589A1 (ja) | 2011-01-20 |
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ID=43449199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2010/051714 WO2011007589A1 (ja) | 2009-07-17 | 2010-02-05 | 圧力スイッチ |
Country Status (6)
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EP (1) | EP2455958B1 (ja) |
JP (1) | JP5017323B2 (ja) |
KR (1) | KR101209375B1 (ja) |
CN (1) | CN102473550B (ja) |
TW (1) | TWI386633B (ja) |
WO (1) | WO2011007589A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102015225723A1 (de) * | 2015-12-17 | 2017-06-22 | Robert Bosch Gmbh | Handwerkzeugmaschinenvorrichtung |
JP6868166B2 (ja) * | 2016-10-03 | 2021-05-12 | Smc株式会社 | シリンダの動作状態監視装置 |
KR102520153B1 (ko) * | 2020-12-01 | 2023-04-11 | (주)제이.케이.에스 | 기계식 차압 조정형 압력스위치 |
Citations (4)
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---|---|---|---|---|
JPS5717036U (ja) * | 1980-07-01 | 1982-01-28 | ||
JPH01122234U (ja) * | 1988-02-12 | 1989-08-18 | ||
JPH09203677A (ja) * | 1996-01-24 | 1997-08-05 | Ckd Corp | 圧力スイッチ |
JPH10208597A (ja) * | 1996-11-20 | 1998-08-07 | Ckd Corp | 圧力スイッチ |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1940338B1 (de) * | 1969-08-08 | 1970-12-10 | Scheuffele & Co Robert | Druckabhaengiger elektrischer Schalter |
FR2518310A1 (fr) * | 1981-12-15 | 1983-06-17 | Telemecanique Electrique | Manostat de volume reduit, de mise en oeuvre et de montage aises |
US5554834A (en) * | 1994-08-04 | 1996-09-10 | Argus Machine Co. Ltd. | Pressure switch |
CA2158623C (en) * | 1995-09-19 | 1999-12-21 | James Richard Ellett | Pressure switch |
CN100350537C (zh) * | 2004-05-31 | 2007-11-21 | 沈锝桓 | 可调式流体控制开关 |
TWM316958U (en) * | 2007-02-16 | 2007-08-11 | Shu-Ru You | Pressure switch |
TWM332770U (en) * | 2007-12-11 | 2008-05-21 | Zi-Qiang Lin | Pressure switch |
-
2009
- 2009-07-17 JP JP2009168669A patent/JP5017323B2/ja active Active
-
2010
- 2010-02-05 EP EP10799653.0A patent/EP2455958B1/en not_active Not-in-force
- 2010-02-05 CN CN2010800308597A patent/CN102473550B/zh not_active Expired - Fee Related
- 2010-02-05 KR KR1020117031223A patent/KR101209375B1/ko not_active IP Right Cessation
- 2010-02-05 WO PCT/JP2010/051714 patent/WO2011007589A1/ja active Application Filing
- 2010-03-15 TW TW099107428A patent/TWI386633B/zh not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5717036U (ja) * | 1980-07-01 | 1982-01-28 | ||
JPH01122234U (ja) * | 1988-02-12 | 1989-08-18 | ||
JPH09203677A (ja) * | 1996-01-24 | 1997-08-05 | Ckd Corp | 圧力スイッチ |
JP3100331B2 (ja) | 1996-01-24 | 2000-10-16 | シーケーディ株式会社 | 圧力スイッチ |
JPH10208597A (ja) * | 1996-11-20 | 1998-08-07 | Ckd Corp | 圧力スイッチ |
Non-Patent Citations (1)
Title |
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See also references of EP2455958A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP2455958A1 (en) | 2012-05-23 |
KR101209375B1 (ko) | 2012-12-06 |
CN102473550A (zh) | 2012-05-23 |
TWI386633B (zh) | 2013-02-21 |
EP2455958A4 (en) | 2014-07-23 |
EP2455958B1 (en) | 2016-04-20 |
JP5017323B2 (ja) | 2012-09-05 |
KR20120044942A (ko) | 2012-05-08 |
TW201104232A (en) | 2011-02-01 |
CN102473550B (zh) | 2013-08-14 |
JP2011023270A (ja) | 2011-02-03 |
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