Browse Prior Art Database

Retractable Support With Safety Interlock

IP.com Disclosure Number: IPCOM000047537D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Parnell, FD: AUTHOR

Abstract

Heavy machine components are often mounted on slides or hinges to permit them to be pulled out for service. When they are pulled out, the center of gravity of the machine is often graphically affected so that these components require retractable casters to prevent the machine from tipping over. This article shows an interlock which interacts with the caster and the machine frame to prevent pulling the heavy component out of the machine frame if the caster fails to rotate down into support position. Fig. 1 shows the caster 11 mounted on an arm 13 in its retracted position. Fig. 2 shows the component being pulled out from the machine and arm 13 has rotated counterclockwise to place the caster 11 nearly, but not quite, into operating position.

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Retractable Support With Safety Interlock

Heavy machine components are often mounted on slides or hinges to permit them to be pulled out for service. When they are pulled out, the center of gravity of the machine is often graphically affected so that these components require retractable casters to prevent the machine from tipping over. This article shows an interlock which interacts with the caster and the machine frame to prevent pulling the heavy component out of the machine frame if the caster fails to rotate down into support position. Fig. 1 shows the caster 11 mounted on an arm 13 in its retracted position. Fig. 2 shows the component being pulled out from the machine and arm 13 has rotated counterclockwise to place the caster 11 nearly, but not quite, into operating position. If for any reason arm 13 failed to rotate further, interlock catch 15 would not be able to rotate because of its interlock with the top of arm 13 and, therefore, the hook portion 17 of interlock 15 would catch on the frame, at 19, and prevent the heavy mechanism from being withdrawn from the machine to the point where the machine becomes unstable. As the mechanism is being withdrawn, pivoting actuator 21 rotates counterclockwise to clear frame portion 19, without causing any other action. As the mechanism is being returned into the machine, actuator 21 engages frame portion 23 to rotate arm 15 clockwise, causing it to move away from the shoulder 25 of arm 15, as shown in Fig. 3. After...