Abstract: A method of manufacturing a wheel rim by bringing end faces of a workpiece into abutment against each other to form a hollow cylindrical body and forming a circumferential recess which is depressed from an outer circumferential wall of said hollow cylindrical body toward an inner circumferential wall thereof, including providing protrusions disposed near ends of a joined area of the hollow cylindrical body and extending in a joining direction, and then pressing the outer circumferential wall of the hollow cylindrical body to form the recess.

Abstract: A rim (10) is produced by a production process including a step (A) of bending a workpiece (11) to bring end faces of the workpiece into contact with each other, a step (B) of forming a circular cylinder body (12) by joining the end faces brought to be in contact with each other, a step (C) of inspecting a joint portion (13) of the circular cylinder body (12), a step (D) of forming a drop portion (16), subsiding toward the inner peripheral wall (15) side, in an outer peripheral wall (14) of the circular cylinder body (12), a by bending both end portions of the circular cylinder body (12), a step (F) of forming hump portions (20) by pressing the circular cylinder body (12) from the inner peripheral wall (15) side to raise the outer peripheral wall (14), and a step (G) for forming a valve hole (22) and water drain holes (24) in the drop portion (16) and the curl portions (18). The rim (10) and a disk (102) that is separately produced are welded to form a wheel (122).

Abstract: A control device for hydraulic equipment where an oil pressure sensor provides an oil pressure output. The sensed pressure output is used in a table to derive a controlled variable limit which is then compared with a controlled variable input. The smaller of the input and limit are used to control hydraulic pressure supplied to the hydraulic oil line. However, also included is a correction device which adjusts the table depending upon whether the output is at a desired oil pressure value or not.

Abstract: It is an object of the present invention to prevent an engine of an industrial vehicle from transmitting vibration thereof to a frame via an axle housing. Further, a cylindrical crosswise rubber vibration isolator is made to intervene between an engine and a vehicle frame, an output shaft of a transmission and an input shaft of a transfer are connected by a universal joint, a cylindrical crosswise rubber vibration isolator is also made to intervene between the transmission and the transfer, and brackets 33 and 34 of the rubber vibration isolator 32 are fastened together with a transmission cover 26 and a transfer cover 27, respectively.

Abstract: On a forklift equipped with a full free lift mast, a limit switch for detecting the maximum free lift of fork on an inner mast is installed in such a manner when the limit switch is turned on, the raising control of fork is stopped, by which a collision between the inner mast and the ceiling is prevented.

Abstract: In a control device for forklift on which a flow control signal is sent from a controller in accordance with a manipulated variable of work machine lever operated by the operator and this flow control signal regulates the degree of opening of an electromagnetic proportional control valve in an oil pipe line to control the working speed of lift cylinders, the degree of opening of the electromagnetic proportional control valve is regulated by a flow control signal having a characteristic such that the value of flow control signal changes in accordance with the load of lift cylinders in the inching zone where the manipulated variable of work machine lever is relatively small, which improves the operability in the inching zone.