| 摘要 |
PURPOSE:To simplify while solidify the structure of a tilt device and increase the reliability on the strength of said tilt device which enables the adjustment of a tilt-down lock position by providing a cam groove for supporting a lock pin on a swivel bracket. CONSTITUTION:As a swivel bracket 15 is moved upward, a lock pin 30 is engaged with adjacent upper stage engaging groove parts 28 in order being guided by a cam groove 31, adjusting a tilt-down lock position gradually to the upper side. In this case, since the lock pin 30 is directly supported by the cam groove 31 provided on the swivel bracket 15, not via an operating lever, etc., the structure of a tilt device can be made simple and solid. Also, since the engagement between the lock pin 30 and a stopper member 34 is removed by means of an engagement adjusting member 35 after the lock pin 30 is moved to return downward after passing through the top stage engaging groove part 28, the swivel bracket 15 is automatically returned down side and the lock pin 30 is newly engaged with the engaging groove parts 28. |
