Abstract: A steering wheel is provided that is able to prevent damage to a layer adjacent to an outer surface layer due to an external force applied when a joined portion between outer surface layer material parts is finished. In a steering wheel comprising a rim portion having a core metal and a covering portion 5 covering the core metal, and a mat material 6 provided between an outer surface material 9 and the covering portion 5 of the rim portion and having a conductive portion 7 on a part facing the outer surface material 9, and the outer surface material 9 has a joined portion 91 formed in a direction intersecting a circumferential direction of the rim portion, the covering portion 5 is provided with a groove 51 in which the joined portion 91 and a part of the mat material 6 are housed, and between the outer surface material 9 and the conductive portion 7, a sliding member 8 is interposed at least in a vicinity of the joined portion 91.

Abstract: In a construction machine where an arm, a working attachment, and a distal end portion of an extensible cylinder are coupled via a power link and an idler link, to achieve protection of a grease feeding piping when the grease feeding piping is arranged in the idler link, and to ensure that the structure of the idler link is not complicated.

Abstract: To provide a clearance adjusting member that allows for easy attaching and detaching works and has no risk of falling off from a pin. A clearance adjusting member, in a pin coupling structure in which a first member and a second member are coupled freely to be rotated in relation to each other by a cylindrical pin, for adjusting an axial clearance between the first member and the second member, the clearance adjusting member comprises a shim in a U-shape or C-shape attached to the pin in the axial clearance, and a restricting means for restricting the shim so as to be freely releasable. A restricted piece protruding radially outward is formed on an outer circumferential edge of the shim. The restricting means includes a pair of restricting pieces spacedly arranged circumferentially on the radially outer side of the pin.

Abstract: A steering wheel is provided that is able to prevent damage to a layer adjacent to an outer surface layer due to an external force applied when a joined portion between outer surface layer material parts is finished. In a steering wheel comprising a rim portion having a core metal and a covering portion 5 covering the core metal, and a mat material 6 provided between an outer surface material 9 and the covering portion 5 of the rim portion and having a conductive portion 7 on a part facing the outer surface material 9, and the outer surface material 9 has a joined portion 91 formed in a direction intersecting a circumferential direction of the rim portion, the covering portion 5 is provided with a groove 51 in which the joined portion 91 and a part of the mat material 6 are housed, and between the outer surface material 9 and the conductive portion 7, a sliding member 8 is interposed at least in a vicinity of the joined portion 91.

Abstract: A switch (15) is configured so as to be operated with two positions of a locked position when an attachment is held and an unlocked position when an attachment is released. Furthermore, a control device (16) receives an operation signal that is output when the switch (15) is operated to the locked position or the unlocked position and switches and controls an electromagnetic switching valve (13) so that the pressure of a hydraulic pump begins to rise and so that, at a stage when a predetermined time has passed, the pressure raising in the hydraulic pump is stopped.