Browse Prior Art Database

Data Storage Library Picker with Locked Gripper for Releasing Action

IP.com Disclosure Number: IPCOM000117574D
Original Publication Date: 1996-Apr-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 8 page(s) / 220K

Publishing Venue

IBM

Related People

Dang, CH: AUTHOR [+2]

Abstract

Disclosed is a passive gripper having latching fingers which resiliently engage notches provided in the media cartridges when the gripper is moved into initial contact with the media cartridge. This same gripper releases the cartridge when the fingers engage the front of the cartridge upon further movement of the gripper toward the media cartridge.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 47% of the total text.

Data Storage Library Picker with Locked Gripper for Releasing Action

      Disclosed is a passive gripper having latching fingers which
resiliently engage notches provided in the media cartridges when the
gripper is moved into initial contact with the media cartridge.  This
same gripper releases the cartridge when the fingers engage the front
of the cartridge upon further movement of the gripper toward the
media cartridge.

      In a data storage library, as illustrated in Fig. 1, the picker
1 transports the data cartridge 2 from the storage receptacles 3 and
the drive 4.  The picker must be able to perform two operations:
picking and inserting at the drive loader and the the storage
receptacle slots.

      The preferred embodiment of the picker design of this
invention, as illustrated in Fig. 2 with an isometric view and in
Fig. 3 with removed top cover, comprises:
  o  Picker shell 5 to guide and contain the cartridge,
  o  A lead screw 6 supported by two bearings 7 and driven by a motor
      8 via gears 9 and 10, the picker shell and the drive train are
      mounted onto a picker hub 11,
  o  A gripper 12 which is driven and guided in the Y direction by
the
      lead screw 6, the gripper comprises:
     -  Fingers 13 which have hooks 14 at their tips and wells 15 at
         the tops of the ramps 16 located at their inner
mid-sections,
         and posts 19 extruding from the hooks 14 in the Z direction,
     -  Locking springs 17 which are not engaged with the fingers 13
         when they are at neutral positions, all are mounted onto a
         gripper main body 18,

      The posts 19 are guided by the grooves 20 and the curbs 21
built onto the inner surfaces of the picker shell, as the gripper
moves along the Y direction.

OPERATION PRINCIPLES:

PICKING: as illustrated in Fig. 4:
  o  The gripper 12 moves toward the cartridge 2, in the (+Y)
      direction,
  o  As the gripper continues to move forward after reaching the
      cartridge, the fingers 13 ride over the sides of the cartridge
      while getting pushed outward in the X direction,
  o  The gripper is stopped when the fingers 13 drop into the
      cartridge ears 22,
  o  The gripper reverses its motion and pulls the cartridge 2 into
      the picker shell 5 by the ears 22, the posts 19 follow the
inner
      path back into the grooves 20.

INSERTING: as illustrated in Fig. 5.
  o  The cartridge is pushed out of the picker shell and toward the
      drive loader or the storage receptacle slot while the fingers
13
      are still engaging the ears 22,
  o  As the cartridge is completely inserted and stopped, it pushes
      the locking springs 17 up the ramps 16 while the gripper
      continues to move forward, when the tips of the springs 17 drop
      in the well 15, the gripper reverses its direction and retracts
     ...