Patent ID: 7410435

Claim:
A hydraulic pipe mechanism for an industrial vehicle comprising: a pulley shaft; a plurality of hydraulic hoses; and a pulley set provided on the pulley shaft, the pulley set having at least first and second hose pulleys that are rotatably supported on the pulley shaft, the first and second hose pulleys being respectively located on sides of the pulley set, each of the first and second hose pulleys having a guide groove for hooking the hydraulic hose therein, each of the first and second hose pulleys having a pair of outer and inner flanges that form side walls of the guide groove respectively, each outer flange being located on the side of the pulley set, each inner flange being located inside the outer flange in the pulley set, each outer flange having a first radius, each inner flange having a second radius, wherein the first radius is larger than the second radius, wherein each of the first and second hose pulleys has a rotational axis, each of the hydraulic hoses having an axis, each guide groove having a groove bottom, wherein the first radius is larger than a first dimension from the rotational axis of the hose pulley to the axis of the hydraulic hose, the first radius being smaller than a second dimension from the rotational axis of the hose pulley to an outer periphery of the hydraulic hose, the second radius being larger than a third dimension from the rotational axis of the hose pulley to the groove bottom of the guide groove, the second radius being smaller than the first dimension.