Abstract: A position detecting device is equipped with a device main body into which a pressure fluid supplied from a pressure fluid supply source is introduced, and an attaching/detaching mechanism that enables attachment and detachment with respect to the device main body. The attaching/detaching mechanism includes an internal nozzle that delivers, toward the side of a detection nozzle, the pressure fluid supplied to the device main body, and a detection port that supplies, to the detection nozzle, the pressure fluid delivered from the internal nozzle.

Abstract: A flow rate control device, including: a body including first and second ports for supplying and discharging pressurized fluid; a set of first and second solenoid valves connected to an upper part of the body and selecting a state of flow of the pressurized fluid; and an opening/closing valve for increasing a flow rate of the pressurized fluid which flows as the result of selection by the first and second solenoid valves. The pressurized fluid is caused to flow from the first port to the second port at a predetermined flow rate while the opening/closing valve is closed, and then the flow rate of the pressurized fluid flowing from the first port to the second port is increased by opening the opening/closing valve.

Abstract: A coupling structure for a piston used in a fluid-pressure cylinder. The piston in the fluid-pressure cylinder includes a piston hole that runs through a central part of the piston in an axial direction thereof. One end of a piston rod and a coupling body coupled to the one end are inserted into the piston hole. The coupling body includes: a main part that contacts the one end of the piston rod; and an angled part formed around the main part and inclined at a prescribed angle with respect thereto. When the coupling body is subjected to pressure inside the piston hole, the diameter of the coupling body increases and a pointed edge of the angled part engages with an inner surface of the piston hole such that the coupling body couples the piston and the piston rod.

Abstract: A flow-through condition of a pressure fluid between first through third ports formed in a body of a residual pressure release valve is switched by a valve plug of a valve mechanism. Between an operating unit for driving the valve mechanism and the body, a converter is disposed for converting rotational movement of the operating unit into linear movement and transferring the linear movement to the valve plug. The converter includes a cylindrical shaped cam ring including a pin inserted through the valve plug, and inclined grooves for guiding the pin. The cam ring includes two divided bodies separable from each other in a radial direction.

Abstract: A two-way valve includes a valve body made of a resilient member and connected to a lower end of a shaft. The valve body is made up from a main body portion having an axial member connected to the shaft, and a thin film skirt portion formed on an outer circumferential side of the main body portion. An outer edge of the skirt portion is sandwiched and gripped between a small diameter part of a housing and a connector of a body. Further, lips that project in a downward direction are formed in a central portion of the main body portion. The lips are seated on a top portion of a partition wall in the body, so that the two-way valve is placed in a valve-closed state.

Abstract: In a case structure for a fluid pressure device, a filter that constitutes part of a fluid pressure unit is equipped with a first body, a case unit connected to a lower portion of the first body, and a filter unit accommodated in the interior of the case unit. The case unit is made up from an outer case, which is formed as a bottomed cylinder from a light-permeable transparent material, and an inner case inserted into the interior of the outer case. Additionally, by insertion of the case unit into an installation hole that opens on a lower portion of the first body and rotating the case unit, projections and retaining walls provided on an outer circumferential surface of the case unit engage with support members provided in the installation hole, thus placing the case unit in a connected state.

Abstract: An ionizer that acts as an electric charge generating device includes a first high voltage power source and a second high voltage power source, which are disposed in confronting relation to each other, and a first wiring arrangement and a second wiring arrangement, which are disposed in confronting relation to each other. The first high voltage power source applies an AC high voltage to needle electrodes via the first wiring arrangement, whereas the second high voltage power source applies an AC high voltage, which is 180° out of phase with the aforementioned AC high voltage, to needle electrodes via the second wiring arrangement.

Abstract: A filter apparatus is equipped with a first body, a case unit connected to a lower part of the first body, and a filter unit, which is accommodated in the interior of the case unit. The case unit is made up from an outer case, which is formed as a bottomed cylinder from a light-permeable transparent material, and an inner case that is inserted into the interior of the outer case. The case unit is inserted into an installation hole that opens on the lower part of the first body, and by rotation thereof, projections and retaining walls provided on an outer circumferential surface of the case unit are made to engage with support members provided in the installation hole, to thereby result in a connected state.

Abstract: A fluid pressure apparatus includes a piston, and a packing provided on an outer circumference of the piston. The packing includes a support ring made of a low-friction material, and a ring-shaped seal member mounted to the support ring. When at least a certain amount of transverse load acts on the piston, an outer circumferential surface of the support ring abuts against an inner circumferential surface of the slide hole, whereby the piston is prevented from contacting with the inner circumferential surface of the slide hole.

Abstract: The present invention relates to a pressure detector. In a body that constitutes part of the pressure detector, a through hole is formed, which is directed upwardly from a substantially central portion of a flow passage through which a pressure fluid flows. The through hole communicates with a sensor chamber in which a pressure sensor is disposed, and a rod-shaped member is disposed displaceably in the through hole. In addition, an end of the rod-shaped member, which is exposed to the flow passage, is pressed by the pressure fluid and displaced upwardly thereby, and pressure is detected as a result of the pressure sensor being pressed by a head of the rod-shaped member.

Abstract: A solenoid valve. In a solenoid section forming part of the solenoid valve, a sleeve is provided on the inner circumferential side of a bobbin around which a coil is wound. This sleeve is formed from magnetic material and includes a cylindrical section and a flange section formed at a lower end of the cylindrical section. At an upper end of the cylindrical section, a tapered section is formed in which an outer circumferential face is recessed in the radially inward direction. The tapered section is arranged facing and in close contact with the outer circumferential face of a fixed core such that the magnetic flux density in the tapered section increases when the solenoid section is excited.

Abstract: In a fluid pressure cylinder, first and second cylinder chambers facing respective opposite end surfaces of a piston are formed inside a cylinder tube including a supply port and a discharge port, and a first piston rod connected to one end surface side of the piston is formed to have a greater diameter than that of a second piston rod connected to another end surface side of the piston. Therefore, a second pressure-receiving area of a second pressure-receiving surface formed on the other end surface of the piston is greater than a first pressure-receiving area of a first pressure-receiving surface formed on the one end surface. Pressure fluid in the first cylinder chamber is supplied to the second cylinder chamber, whereby area difference between the first pressure-receiving area and the second pressure-receiving area causes the piston to move toward the first cylinder chamber.

Abstract: A valve structure for a fluid pressure device. A valve element for constituting a pressure reducing valve is provided with a first housing which is interconnected with a stem, a second housing which is provided on the outer peripheral side of the first housing, and packing which is provided between the first housing and the second housing. The packing is mounted and sandwiched between a tapered section of the first housing and an outer wall section of the second housing, and thereby the packing is affixed. A first tube section of the first housing is inserted into a second tube section of the second housing, and the first housing and the second housing are affixed integrally to each other by, for example, welding or adhesion.

Abstract: In a fluid pressure apparatus, a packing is constituted from an annular seal member made of an elastic rubber material, and support rings made of a material possessing low friction, which are mounted on an outer circumference of the seal member. The seal member includes, on an outer circumference thereof, a sealing projection, shoulder portions formed on both sides of the sealing projection, and concave grooves interposed between the shoulder portions and the sealing projection. The support rings include support surfaces on outer circumferences thereof, and engagement projections on inner circumferences thereof, such that by engagement of the projections in the concave grooves, the support rings are mounted on the seal member so as to surround outer circumferences of the shoulder portions.

Abstract: A flow control device is provided with a first body having a first port through which pressure fluid is supplied, and a second body which is installed on the first body. A valve mechanism which controls the circulation state of the pressure fluid that circulates from the first port to a second port is provided inside this first body. Furthermore, a first connecting section of the first body is inserted into and engaged with the inside of a second connecting section formed at the upper end of the second body, resulting in the first body and the second body being integrally connected together.

Abstract: In a position measurement apparatus and a positioning measuring method, an image capturing element having an imaging region of a dimension smaller than that of a workpiece is moved relatively over a surface of the workpiece while an image on the surface of the workpiece is captured. In addition, a pattern on the surface of the workpiece is extracted from an image (I(t)) inside the imaging region, and a displacement amount of the pattern occurring in the image (I(t+1)) inside the imaging region is detected. A position on the surface of the workpiece is measured based on the detected displacement amount and the dimension.

Abstract: A flow path opening/closing valve is equipped with a main body having a valve chamber housing therein a rotatable valve body, and a sleeve that abuts without gaps against an inner circumferential surface of the valve chamber, such that the inner circumferential surface of the valve chamber and an inner circumferential surface of the sleeve slide without gaps against an outer circumferential surface of the valve body, for thereby shielding the valve chamber by the valve body and the sleeve. First and second seat members, and first and second o-rings that urge the first and second seat members toward the side of the valve body are arranged inside first and second annular grooves, which are provided on the inner circumferential surface and the inner circumferential surface.

Abstract: A pressure reducing apparatus includes a body being equipped with a first side port through which a pressure fluid is supplied and a second side port through which the pressure fluid having been reduced in pressure is discharged. Further, a feedback passage is formed, which establishes communication between the second side port and a third diaphragm chamber that faces toward a pilot valve. Additionally, a pressure fluid that flows through the second side port is introduced through the feedback passage into the third diaphragm chamber, whereby a third diaphragm is pressed upwardly against an elastic force of a second spring into equilibrium.

Abstract: A valve mechanism, which constitutes a solenoid valve as one example of a valve, includes a valve plug that is displaced in an axial direction under an excitation action of a solenoid unit, and is equipped with a flexible diaphragm disposed between a valve body and an annular groove formed on an outer circumferential surface of the valve plug. The diaphragm is flexible accompanying displacement of the valve plug and includes first through third projections on an inner edge portion thereof. In addition, the first through third projections are capable of coming into abutment, respectively, against an inner circumferential surface, a first wall surface, and a second wall surface of the annular groove. Further, the inner edge portion is inserted in the interior of the annular groove while being movable slightly in the direction of displacement of the valve plug.

Abstract: In an electric clamp apparatus, a drive unit including a motor is disposed on an end of a body on which a clamp arm is rotatably supported. The drive unit includes a hollow housing connected to the body, and a motor unit, which is configured to be accommodated in the interior of the housing. After the motor unit has been inserted into the interior of the housing from one end side thereof, two lock plates, which are disposed on a frame of the motor unit, are rotated, whereby holes of the lock plates are made to engage with projections of the housing. As a result, the motor unit is fixed in a state of being accommodated in the housing.