Abstract: A driving assistance device of an embodiment includes a recognizer configured to recognize a surrounding situation of a mobile object, a determiner configured to determine, on the basis of the surrounding situation, whether to prompt a driver of the mobile object to perform a steering operation and whether there is a possibility of a risk occurring for the mobile object, and a notification controller configured to cause a speaker to output a guidance sound prompting the driver of the mobile object to perform a steering operation and a warning sound with respect to the risk on the basis of a result of the determination by the determiner, in which the notification controller causes output modes for the guidance sound and the warning sound to be different from each other.

Abstract: According to an embodiment, a driving assistance device includes a recognizer configured to recognize a surrounding situation of a mobile object, a decider configured to decide whether or not to prompt a driver of the mobile object to perform acceleration or deceleration on the basis of the surrounding situation, and a notification controller configured to cause a speaker to output a notification sound for prompting the driver of the mobile object to perform the acceleration or deceleration on the basis of a decision result. The notification sound is a notification sound obtained by continuously changing a structure of a sound.

Abstract: A valve device comprising: a flow passage block in which a flow passage is formed; a diaphragm configured to open and close the flow passage; an actuator configured to push down the diaphragm via a diaphragm holder; a tubular bonnet formed with an internal thread on an inner circumferential surface, the bonnet being configured to join the flow passage block and the actuator; a tubular adjusting screw threaded to the internal thread, the adjusting screw being configured to come into contact with the diaphragm holder to adjust a valve opening position of the diaphragm; and an annular lock nut configured to lock the adjusting screw by being screwed into the internal thread.

Abstract: A valve device includes a valve body; a cylindrical member provided in an accommodation recess and communicating with the first flow path; a valve seat supported by the cylindrical member; a seal member interposed between the periphery of the opening of first flow path on the bottom surface of the accommodation recess and the lower end portion of the cylindrical member; an annular plate which is flexible, air-tightly or liquid-tightly fixed to an annular support portion formed on the inner peripheral surface of the accommodation recess, air-tightly or liquid-tightly fixed to an annular support portion formed on the outer peripheral surface of the cylindrical member and has a plurality of openings communicating with the second flow path; and a diaphragm that moves between an open position at which the diaphragm does not contact the valve seat and a closed position at which the diaphragm contacts the valve seat.

Abstract: A valve device comprising: a flow passage block in which a flow passage is formed; a diaphragm configured to open and close the flow passage; an actuator configured to push down the diaphragm via a diaphragm holder; a tubular bonnet formed with an internal thread on an inner circumferential surface, the bonnet being configured to join the flow passage block and the actuator; a tubular adjusting screw threaded to the internal thread, the adjusting screw being configured to come into contact with the diaphragm holder to adjust a valve opening position of the diaphragm; and an annular lock nut configured to lock the adjusting screw by being screwed into the internal thread.

Abstract: A valve device includes: a valve body that forms a first flow path and a second flow path; an inner disc that includes an inner annular part disposed around an opening of the first flow path, an outer annular part disposed on an outer peripheral side of the inner annular part, and a connecting part that includes a plurality of openings that communicates with the second flow path and that connects the inner annular part and the outer annular part; a valve seat disposed on the inner annular part; and a diaphragm that, at a peripheral edge part of the diaphragm, comes into contact with the outer annular part and makes the first flow path and the second flow path continuous and discontinuous by moving between an open position of non-contact and a closed position of contact with the valve seat.

Abstract: An actuator includes a casing having a first annular groove formed in an inner peripheral portion thereof; a piston having a second annular groove formed in an outer peripheral portion thereof, provided in the casing to form a pressure chamber together with the casing, and driven by a drive fluid from an outside of the actuator; and an annular seal member having a first fitting portion to be fitted into the first annular groove and a second fitting portion to be fitted into the second annular groove to seal the pressure chamber.

Abstract: Provided is a valve device which can precisely adjust the flow rate while ensuring the flow rate of the fluid. A valve device includes a main actuator which receives a pressure of a supplied drive fluid and moves an operating member to an open position or closed position; an adjusting actuator arranged to receive at least a part of a force generated by the main actuator and for adjusting the position of the operating member positioned at the open position; and a pressure regulator provided in a feed path of the drive fluid to the main actuator and for regulating the pressure of the supplied drive fluid to suppress fluctuation of the pressure of the drive fluid supplied to the main actuator.

Abstract: To provide a valve device capable of easily and precisely adjusting a flow rate of a flowing fluid, and an actuator used in the valve device. The problem is solved by an actuator including pistons housed in a housing, a supply port of compressed air provided to a casing constituting the housing, and an adjustment member that is provided to a position separated from the supply port and regulates an upper limit position of possible movement of the piston that comes into contact with the adjustment member. The piston comes into contact with the adjustment member and is positioned in the upper limit position when compressed air is supplied through the supply port. The adjustment member s provided so as to allow adjustment of the upper limit position from outside the housing.

Abstract: A valve device includes: a valve body that forms a first flow path and a second flow path; an inner disc that includes an inner annular part disposed around an opening of the first flow path, an outer annular part disposed on an outer peripheral side of the inner annular part, and a connecting part that includes a plurality of openings that communicates with the second flow path and that connects the inner annular part and the outer annular part; a valve seat disposed on the inner annular part; and a diaphragm that, at a peripheral edge part of the diaphragm, comes into contact with the outer annular part and makes the first flow path and the second flow path continuous and discontinuous by moving between an open position of non-contact and a closed position of contact with the valve seat.

Abstract: A valve device includes a valve body; a cylindrical member provided in an accommodation recess and communicating with the first flow path; a valve seat supported by the cylindrical member; a seal member interposed between the periphery of the opening of first flow path on the bottom surface of the accommodation recess and the lower end portion of the cylindrical member; an annular plate which is flexible, air-tightly or liquid-tightly fixed to an annular support portion formed on the inner peripheral surface of the accommodation recess 23 of the valve body 2, air-tightly or liquid-tightly fixed to an annular support portion formed on the outer peripheral surface of the cylindrical member and has a plurality of openings communicating with the second flow path; and a diaphragm that moves between an open position at which the diaphragm does not contact the valve seat and a closed position at which the diaphragm contacts the valve seat.

Abstract: A gas supply system is provided with an automatic valve that is provided in a flow passage and adjusts a flow rate of process gas supplied to a chamber by automatic opening and closing, and a manual valve that is provided downstream of the automatic valve in the flow path and in immediate vicinity of the chamber and adjusts the flow rate of the process gas by manual opening and closing. The manual valve is a direct diaphragm valve having a diaphragm that is placed and separated on and from a seat in conjunction with a stem and a disk along with opening and closing, and includes a stroke adjusting mechanism that adjusts a valve stroke.

Abstract: An actuator includes: a casing; a pressure reducing valve and a piston. The pressure reducing valve is provided in the casing to reduce a pressure of a driving fluid supplied from an outside of the casing to a predetermined level. The piston is provided in the casing to form a pressure chamber together with the casing. The piston is driven by the driving fluid that has been pressure-reduced to the predetermined level.

Abstract: Provided is a valve device which can precisely adjust the flow rate while ensuring the flow rate of the fluid. A valve device includes a main actuator which receives a pressure of a supplied drive fluid and moves an operating member to an open position or closed position; an adjusting actuator arranged to receive at least a part of a force generated by the main actuator and for adjusting the position of the operating member positioned at the open position; and a pressure regulator provided in a feed path of the drive fluid to the main actuator and for regulating the pressure of the supplied drive fluid to suppress fluctuation of the pressure of the drive fluid supplied to the main actuator.

Abstract: An actuator includes a casing having a first annular groove formed in an inner peripheral portion thereof; a piston having a second annular groove formed in an outer peripheral portion thereof, provided in the casing to form a pressure chamber together with the casing, and driven by a drive fluid from an outside of the actuator; and an annular seal member having a first fitting portion to be fitted into the first annular groove and a second fitting portion to be fitted into the second annular groove to seal the pressure chamber.

Abstract: An actuator includes: a casing; a pressure reducing valve and a piston. The pressure reducing valve is provided in the casing to reduce a pressure of a driving fluid supplied from an outside of the casing to a predetermined level. The piston is provided in the casing to form a pressure chamber together with the casing. The piston is driven by the driving fluid that has been pressure-reduced to the predetermined level.

Abstract: A gas supply system is provided with an automatic valve that is provided in a flow passage and adjusts a flow rate of process gas supplied to a chamber by automatic opening and closing, and a manual valve that is provided downstream of the automatic valve in the flow path and in immediate vicinity of the chamber and adjusts the flow rate of the process gas by manual opening and closing. The manual valve is a direct diaphragm valve having a diaphragm that is placed and separated on and from a seat in conjunction with a stem and a disk along with opening and closing, and includes a stroke adjusting mechanism that adjusts a valve stroke.

Abstract: To provide a valve device capable of easily and precisely adjusting a flow rate of a flowing fluid, and an actuator used in the valve device. The problem is solved by an actuator including pistons housed in a housing, a supply port of compressed air provided to a casing constituting the housing, and an adjustment member that is provided to a position separated from the supply port and regulates an upper limit position of possible movement of the piston that comes into contact with the adjustment member. The piston comes into contact with the adjustment member and is positioned in the upper limit position when compressed air is supplied through the supply port. The adjustment member s provided so as to allow adjustment of the upper limit position from outside the housing.