| 摘要 |
<p>1502540 Sawing E ZLAIKHA 24 Sept 1976 [3 Oct 1975] 39777/77 Heading B5L A workpiece holder and feeder mountable on a rectangular base 4 of a machine tool, such as a band saw, comprises a pair of parallel cross bars 84, 86 engageable with opposite sides of the base, means 80, 82 secured to the cross bars and adapted to engage the other two sides of the base, a pair of parallel guide bars 70, 72 fixed to the cross bars, a table 6 for supporting the workpiece and slidable on the base between the guide bars towards the tool 2, and a gravity responsive mechanism 34 fixed to one 70 of the guide bars and to the table 6 and including means 32 for suspending a weight 36 such that, in use, the weight applies a continuous and uniform feeding force as it is lowered to feed the table and a workpiece thereon towards the tool. The means 80, 82 consist of angled members which are adjustably secured to the cross bars 84, 86 to locate the apparatus on the base 4 of the machine tool such as a band saw having a vertical blade 2. The guide bars 70, 72 are secured to the cross bars and have grooved edges 74 engaging complementary edges 76 of the table 6 which is formed with a slit 8 to accommodate the blade 2. One end of the table is connected by rods 12, 14 to a bar 10, the ends of which mount pulleys 20, 24 rotatable about vertical pivots 22, 26. A third roller 28 is mounted on a horizontal pivot 30 on a plate 102 fixed to the guide bar 72. A second plate 104 is secured to the guide bar 70 and one end of a cable is secured to the plate, guided over pulleys 20, 24, 28 and connected to a holder 34 for a weight 36 which acts through the pulleys 20, 24 and bar 10 to urge the table along the guide bars towards the saw blade 2 to a limit determined by an adjustable stop 114. A pusher block 40 for advancing the workpiece is mounted on the table and consists of a plate section 42 and bar section 44, the block is mounted for angular adjustment on the table, workpieces being held against the block by clamps 64 and screws 62. The block may be removed from the table and the workpiece clamped directly on the table by the clamps 64 and screws 62 engaging threaded holes 66 in the table. A spacer bar 110 may be mounted on the table by screws 112.</p> |
