| 摘要 |
<p>A machine for inserting a strip into a concrete expansion joint has features to raise and lower insertion disks 29.31. The machine has a frame 13 mounted on wheels 41. The insertion disks 29, 31 are mounted to the same axle 39 as the wheels. The axles have eccentric central offset portions 39b. A control disk 43 mounted to the outside of the axle, rotates the axle to raise and lower the insertion disk. A pair of linkage bars 55, 57 connect the control disk to an upper control disk 53 which is operated by an operator. Another pair of linkage bars 49, 51 connect the rear axle to the front axle for movement in unison.</p> |
