Abstract: This sensor state determination system is a sensor state monitoring system capable of accurately determining whether or not a detecting sensor used with a railroad vehicle is in an abnormal state. This system includes: a detecting sensor capable of detecting a physical value acting upon the railroad vehicle; and an electronic control device. A monitoring sensor equivalent to the detection sensor is installed at a position equivalent to the position of the detection sensor. The electronic control device is provided with a determination means (coherence calculation section, state determination section) that computes, based on a first signal detected by the detecting sensor and a second signal detected by the monitoring sensor, a coherence value indicating a correlation between the signals. The electronic control device determines that the detecting sensor is in an abnormal state if the coherence value is smaller than a preset abnormality determination value.

Abstract: A rolling stock includes: a pair of left and right post members provided upright on inner sides of left and right end portions of an end beam of an underframe, the end beam joined to a lower portion of a cab end structure; a recess portion open frontward, the recess portion formed in a front portion of the end beam between the pair of post members; and an impact absorbing member disposed between a bottom face of the recess portion and an inner face of the outside plate. The recess portion has such a size that the impact absorbing member is accommodated within the recess portion after being compressively deformed. Since the impact absorbing member is disposed on an inner side of the outside plate, the impact absorbing member is not exposed to the outside of the car body, and thus does not impair the design of the car body.

Abstract: A railroad vehicle that moves a door to an airtight position and maintains air tightness of the door without increasing the size of a cylinder device; and a plug door for a railroad vehicle. When a door moves to a position, a piston extends in the vehicle width direction, a pressing member is contacts the inner surface of the door, and the door is moved toward a door frame. An auxiliary pressing device brings the piston into perpendicular contact with the inner surface of the door making it is possible to efficiently move and press the door without increasing the size of a cylinder device even when the door must be moved across a distance to arrive at an airtight position. The main pressing device is used to press the door toward the door frame.

Abstract: A folding table includes: a table body provided with a pair of hinge pins and a pair of lock pins, each of the pairs protruding oppositely in left-right direction; and a pair of left and right brackets having shaft holes in which the hinge pins are inserted and movable holes in which the lock pins are inserted. Spring members mounted in the movable holes press the lock pins. The table body is rotatably supported by the brackets affixed to a wall surface. The folding table has closing plates having through-holes respectively through which the hinge pins and the lock pins are penetrated. The closing plates are sandwiched between the table body and the brackets to close the movable holes.

Abstract: Provided is a rolling stock including: an upper reinforcement beam provided in a railroad-tie direction in a joint portion between an upper end portion of a cab end structure and an upper end portion of a side structure; and a post member coupling the upper reinforcement beam and an end beam of an underframe, in which the post member includes: a lower post portion having a lower end joined to the end beam; an upper post portion having a rear end joined to the upper reinforcement beam; and a window opening post portion provided between the lower post portion and the upper post portion in conformity with an inclination of a front window provided in a cab end structure, the window opening post portion is formed to have a smaller width dimension in a rail direction than a width dimension of the lower post portion in the rail direction.

Abstract: A rolling stock in which a streamlined cab end structure includes: a pair of corner posts having lower half portions joined respectively to a pair of corner post reinforcement member standing upright on opposite end portions of an end beam of the underframe and upper half portions inclined toward the rear of the car body; an upper reinforcement beam laid between upper end portions of the pair of corner posts; a pair of end posts having lower half portions joined respectively to a pair of end post reinforcement members, and upper half portions inclined toward the rear of the car body; and a pair of coupling member respectively coupling upper portions of the pair of end posts and a front end portion of the roof structure, and the upper reinforcement beam has such a strength that the car body can be lifted up from above by use of a crane.

Abstract: A friction stir welding apparatus includes a rotating tool provided with an upper rotating body arranged to be axially adjustable in position by an upper actuator, a lower rotating body integral with a rotating main rod extending through the upper rotating body and arranged to be axially adjustable in position by a lower actuator, and a stirring part formed in the rod. The upper rotating body and the lower rotating body clamp therebetween a joint of members to be joined placed with their end faces butting each other. The stirring part is rotated to stir the joint by frictional heat to join them. The rotating tool includes a slide plate attached, through a thrust bearing, to one or both of end portions of the upper rotating body and the lower rotating body facing each other to provide good finished surfaces of the joint.

Abstract: Provided is a sound absorbing panel that can satisfy the heat resistance properties and melting/dripping resistance properties required inside of a railway vehicle. A pier sound absorbing panel includes five sheets of first through fifth glass cloths that are stacked on an aluminum base plate. The edge section of the fifth glass cloth is affixed to the rear surface of the base plate using an adhesive, and the first through fourth glass cloths are fastened using staples. In other words, the first glass cloth and the base plate are fixed using an adhesive, and this adhesive is prevented from melting by the five sheets of the first through fifth glass cloths. The adhesive that fixes the edge section of the fifth glass cloth at the other surface of the base plate is prevented from melting by the five sheets of the first through fifth glass cloths and the base plate.

Abstract: A folding table includes: a table body provided with a pair of hinge pins and a pair of lock pins, each of the pairs protruding oppositely in left-right direction; and a pair of left and right brackets having shaft holes in which the hinge pins are inserted and movable holes in which the lock pins are inserted. Spring members mounted in the movable holes press the lock pins. The table body is rotatably supported by the brackets affixed to a wall surface. The folding table has closing plates having through-holes respectively through which the hinge pins and the lock pins are penetrated. The closing plates are sandwiched between the table body and the brackets to close the movable holes.

Abstract: Provided is a vehicle that elevates a working beam installed between a pair of booms with a working beam elevating unit and can ensure the area of a load receiving surface where a load is loaded. The working beam elevating unit is received in a working beam and one end of a chain is fixed to a boom. Therefore, the working beam is moved up/down by loosening and retracting the chain. Therefore, as the working beam elevating unit is installed at the working beam, it is not necessary to ensure a space for installing the working beam on a vehicle body. Therefore, it is correspondingly possible to enlarge the space (area of the load receiving surface) on the vehicle for loading a load.

Abstract: A railway vehicle includes an underframe, side structures, end structures, and a roof structure which form a vehicle body with a crushable zone. In the crushable zone, a slide center beam and a guide center beam are connected with each other by a lower fuse member, and a slide bar and guide frame are connected with each other by an upper fuse member. When the fuse members are broken, upper and lower slide portions are brought into a slidable state.

Abstract: A railway vehicle body tilting system has a height control valve for supplying and discharging compressed air to and from an air spring by an actuator, an auxiliary control valve for supplying compressed air to the air spring and thereby causing a car body to tilt, a backup valve for switching the connection between the air spring and either the height control valve or the auxiliary control valve, and a controller installed in each of vehicles linked together as a train. During normal operation, the controller provided in each of the cars controls the height control valve of the respective car and monitors for faulty operation in other linked controllers. If a fault arises in a linked controller, control over the malfunctioning controller is terminated, and another normal controller controls a backup valve in the car with the malfunctioning control device.