Abstract: A loudspeaker diaphragm includes a woven fabric which is a base member, a sealing layer, and a coating layer. The woven fabric includes a first face and a second face on the reverse side of the woven fabric from the first face. The woven fabric is made into the shape of a diaphragm. The sealing layer is disposed on the first face of the woven fabric, and seals the mesh openings surrounded by warp threads and weft threads of the woven fabric. The coating layer is formed of a first composite material which is a mixture of a plurality of first short nanofibers and a first resin. The coating layer permeates the woven fabric from the second face of the woven fabric to the sealing layer.

Abstract: A loudspeaker diaphragm includes a cone having a curved surface from the outer to the inner periphery, and an annular edge of which inner peripheral part is bonded to the front side of the outer peripheral part of the cone. When seen from the front, the outer periphery of the cone is defined by smooth connection of three larger-diameter parts tangent to a first circle with a larger diameter, and three smaller-diameter parts each located between adjacent two of the three larger-diameter parts and tangent to a second circle with a smaller diameter. In the cone, a shape defined by connecting together points at the same position on the central axis is more circular as the points approach the inner periphery from the outer periphery. The inner periphery of the edge has a smaller radius than the second circle.

Abstract: A loudspeaker diaphragm includes a woven fabric which is a base member, a sealing layer, and a coating layer. The woven fabric includes a first face and a second face on the reverse side of the woven fabric from the first face. The woven fabric is made into the shape of a diaphragm. The sealing layer is disposed on the first face of the woven fabric, and seals the mesh openings surrounded by warp threads and weft threads of the woven fabric. The coating layer is formed of a first composite material which is a mixture of a plurality of first short nanofibers and a first resin. The coating layer permeates the woven fabric from the second face of the woven fabric to the sealing layer.

Abstract: A loudspeaker diaphragm includes a cone having a curved surface from the outer to the inner periphery, and an annular edge of which inner peripheral part is bonded to the front side of the outer peripheral part of the cone. When seen from the front, the outer periphery of the cone is defined by smooth connection of three larger-diameter parts tangent to a first circle with a larger diameter, and three smaller-diameter parts each located between adjacent two of the three larger-diameter parts and tangent to a second circle with a smaller diameter. In the cone, a shape defined by connecting together points at the same position on the central axis is more circular as the points approach the inner periphery from the outer periphery. The inner periphery of the edge has a smaller radius than the second circle.

Abstract: A mast extends downward of the upper surface of a lower frame, guide portions that are capable of moving by sliding on a wall surface of the mast are plurally arranged in the elevating/lowering direction of the elevating/lowering portion, a lower frame is provided with a guide portion movement region A that enables movement of the lowermost guide portion among the guide portions to move downward of the upper surface of the lower frame. According to the present invention, it is possible to space apart the guide portions without lowering the storage efficiency of cargoes in an automated warehouse.

Abstract: A stacker crane, which transports goods between storage shelves, comprises the storage shelves arranged on a plurality of levels; an elevator portion, traveling on tracks provided along the storage shelves, and which accommodates goods; a set of masts, which move vertically while in contact with the elevator portion; and, a mast support frame, installed avoiding the region of movement of the elevator portion in the range in which the elevator portion and the masts can make contact. By this means, the occurrence of dead space due to interference between the elevator portion and the lower frame can be prevented.

Abstract: The frog-leg-arm robot is provided with a torque motor connected to a wrist rotation shaft to supply torque to a rotation shaft to which the torque motor itself is connected and a control unit in which, when each of arms constituting the frog-leg-arm robot is able to shift from the present posture to any plurality of postures including a targeted posture by a driving device, the torque motor is electrically controlled so that the torque is supplied to the wrist rotation shaft in a direction in which each of the arms is able to shift to the targeted posture.

Abstract: A stacker crane travels on a track provided along storage shelves arranged on numerous levels, and by causing a cage which receives goods to move vertically between a set of masts erected vertically, conveys goods between the various storage shelves; the cage comprises a main frame, on which the goods are placed, a pair of side frames, provided at each of the end portions of the main frame, suspended by a driving device via an elevator wire, and which are caused to be moved vertically in a state of contact with the masts, and, buffer member, which, among the pair of side frames connected to the main frame, is installed only between one of the side frames and the connection portion with the main frame. Stress acting on the cage arising from a change in the mast interval can be reduced, without interposing a buffer member between the cage and guide rollers.