Claims
- 1. A pile board inserting method comprising series of steps of:
- lifting pile boards supported on support brackets capable of supporting pile boards during their upward movement and of escaping pile boards during their downward movement by raising lifting bars holding the support brackets to locate a top pile board among those supported on the support brackets at a pile board inserting position;
- inserting the top pile board located at the pile board inserting position into a sheet piling unit of a printing press by pile board inserting means;
- generating an alarm by pile board depletion warning means upon a decrease of a number of the pile board supported on the support brackets to a predetermined number during a operation for successively locating the pile boards supported on the support brackets at the pile board inserting position by raising the lifting bars;
- stopping the printing press by stopping means if a duration of the alarm exceeds a predetermined time;
- continuing the upward movement of the lifting bars if a stack of pile boards is placed at a storage position and the alarm is stopped by an operator before an elapse of the predetermined time after the generation of the alarm;
- lowering the lifting bars after the bottom pile board has been inserted into the sheet piling unit and the arrival of the lifting bars at the uppermost position has been detected by upper limit position detecting means;
- detecting an arrival of the lifting bars at a lowermost position by lower limit position detecting means after the support brackets have escaped the bottom pile board among those stacked at the storage position;
- raising the lifting bars after the lower limit position detecting means has detected the arrival of the lifting bars at the lowermost position and an automatic start switch has been operated, to locate the pile boards supported on the support brackets successively at the pile inserting position; and
- sequentially repeating the foregoing steps.
- 2. A pile board inserting method according to claim 1, wherein the alarm generated by said pile board depletion warning means is stopped by operating said automatic start switch.
Priority Claims (2)
Number |
Date |
Country |
Kind |
2-141587 |
Jun 1990 |
JPX |
|
2-147444 |
Jun 1990 |
JPX |
|
Parent Case Info
This application is a division of U.S. patent application Ser. No. 07/686/181 filed Apr. 16, 1991, now U.S. Pat. No. 5,240,370.
US Referenced Citations (5)
Foreign Referenced Citations (7)
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741645 |
Aug 1966 |
CAX |
1002364 |
Jul 1957 |
DEX |
1288985 |
Feb 1969 |
DEX |
218062 |
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JPX |
71025 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
686181 |
Apr 1991 |
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