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Work Carrier Gripper Transfer Mechanism

IP.com Disclosure Number: IPCOM000082944D
Original Publication Date: 1975-Mar-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 4 page(s) / 133K

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This device is used to transport or interchange work carriers from station "A" to "B" and accurately position them at the work station.

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Work Carrier Gripper Transfer Mechanism

This device is used to transport or interchange work carriers from station "A" to "B" and accurately position them at the work station.

The work carrier gripper assemblies 1 (see Fig. 1) and 2 (see Fig. 2) are attached to a double-ended arm 23 (Fig. 3). This arm rotates 360 degrees and moves up and down twice per cycle to interchange carriers. The transfer sequence of pick up and deposit of carriers is shown in Fig. 3.

The carriers are picked up in the following sequence of events.

The arm 23 moves from the home or idle position to a position over the work carriers 6. When the arm containing the gripper assembly moves down, the carrier retaining mechanism 3, (Fig. 2) is displaced by plate 4 acting against roller 5 releasing the carrier 6 at the work station. Then two rollers 7 contact the front of the carrier 6 to move the carrier locating surfaces, notch 8 and flat 9, away from the two work station locating pins 10 to prevent damage to the locating surfaces when the carrier 6 is lifted.

Next, programming levers 11 contact rollers 12 at the work station which displace levers 11, to remove torsional spring force from springs 13 that normally holds carrier grippers 14 and 15 in the open position.. The two grippers 14 and 15 are fixed to the shaft 16 by pins to allow them to operate together.

A sleeve 17 is provided to prevent the torsion spring 13 from contacting the shaft 16 to allow free rotation of the gripper mechanism. The programming lever 11 is displaced prior to the grippers 14 and 15 being moved below the carrier 6. Slot 18 has been provided in gripper 15 to allow gripper drive pin 19 to travel with programming lever 11 and allow grippers 14 and 15 to remain open until they travel below the carrier 6, where gravity causes them to move into a carrier retaining position. Just before the grippers 14 and 15 move below the carrier 6, leaf springs 20 and 21 contact the top of the carrier and are deflected until sufficient clearance is produced below the carrier to allow the grippers 14 and 15 to drop in place (see Figs. 1A, 1B).

As the gripper assembly moves up, the programming lever 11 remains in contact with work station rollers 12 which holds the grippers in place allowing eleva...