| 摘要 |
1289071 Boots &c FORTUNA-WERKE MASCHINENFABRIK AG 19 April 1971 [8 May 1970] 24488/71 Heading A3B In a shoe making machine of the kind in which a last 10 mounted on a support 2 is advanced in a longitudinal direction below a tool and is tilted about a longitudinal axis Q-S, the drive means for tilting the support 2 is connected to the support 2 by an engageable and disengageable coupling Kpl, the coupling Kpl being disengaged when a control member RO contacts the last bottom to allow the control member to align the initial position of the last 10. As described the last support 2 is mounted on a carriage 1 which can be reciprocated in the direction of arrow P by a chain drive 14. The last 10 moves below a tool, e.g. an abrasive band 16, which is mounted in a tool head 9 which can move heightwise in the direction of arrow N, the tool head initially being supported by a roller 1 on the head 9 engaging a guide 8 on the last support 2. The last 10 is supported by a last pin 4 mounted on a frame 3 which can tilt about axis Q and a toe support 5 which can tilt about axis S and which can be raised by solenoid 6 to clamp the last 10 against the pin 4. The toe support 5 can be adjusted in a longitudinal direction by spindle 19 and is connected to the frame 3 by a fork 17 so that the toe support 5 tilts with the heel support. During the advance of the last support 2 the support is tilted by drive means (not shown) connected to the support 2 by coupling Kp1 to align the last bottom with respect to the tool 16. The machine includes a control member RO consisting of a frame pivoted to the carriage 1 at M, a handle H pivoted to the frame at V and a contact member 20. Movement of the control member RO operates the various switches that control the machine. In operation a last 10 is placed on the support 2 with the control member RO in its initial position O (Fig. 2). Movement of the control member RO to position I causes the toe support 5 to be raised to clamp the last in the support 2 and disengages the coupling Kpl so that the last 10 is free to tilt. The control member is then moved to position II where contact member 20 engages the last bottom to tilt the last 10 so that it is correctly aligned with the tool 16. The handle H is then moved to position III which causes the coupling Kp1 to be re-engaged so that the last is held in its correct angular position. The control member RO is then moved back to position O and as it passes through position I the main drive is started to advance the carriage 1 so that the shoe bottom is roughened by tool 16. When the carriage 1 returns to its initial position switch Z is operated to release the last from the support 2. |
