| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic piping structure of a tilt cylinder capable of maintaining a stopped state of hydraulic piping even when the tilt cylinder for tilting a pair of left and right masts of a forklift truck in the back-and-forth direction swings in the vertical direction following the back-and-forth tilting movement of the masts, and routable without giving consideration to movements of the tilt cylinder upon laying out the hydraulic cylinder. SOLUTION: On a pivot pin 10 inserted into a base end part of the tilt cylinder 3, flow passages 12, 13 comprising first port holes 12a, 13a bored in the axial direction and second port holes 12b, 13b bored in the diametrical direction, crossing and communicating, are formed on both ends thereof. An end of the flow passage 12 is communicated with a piston chamber 3a of a cylinder by a communicating passage 14, and an end of the flow passage 13 is communicated with a rod chamber 3b of the cylinder by a held communicating passage 15 which is arranged in parallel to a cylinder tube 32. On the other ends of the flow passages 12, 13, hydraulic piping 8, 9 extending from a control valve 7 are connected thereto. COPYRIGHT: (C)2004,JPO
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