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Retractable Mirror Module for Tow Cart Light Curtain

IP.com Disclosure Number: IPCOM000061827D
Original Publication Date: 1986-Sep-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Goodrich, KM: AUTHOR [+4]

Abstract

Mechanically interconnected mirror modules, mounted on a tow cart, are designed to be externally actuated to extend or retract upon the engagement or disengagement of an automated guided vehicle (AGV). The mirror modules aid in completing a light path forming a light curtain which optically controls the movement of the AGV. Fig. 1 shows an AGV attached to a tow cart around which a light source creates a light curtain with the aid of mirrors suitably located to direct the light path to a photodetector which controls the movement of the AGV. Fig. 2 shows the mirror modules 10 mounted to the underside of the AGV. Mirror module 10 is comprised of extension arms 11 and 12 suitably positioned to be externally actuated by engagement means 13 and disengagement means 14.

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Retractable Mirror Module for Tow Cart Light Curtain

Mechanically interconnected mirror modules, mounted on a tow cart, are designed to be externally actuated to extend or retract upon the engagement or disengagement of an automated guided vehicle (AGV). The mirror modules aid in completing a light path forming a light curtain which optically controls the movement of the AGV. Fig. 1 shows an AGV attached to a tow cart around which a light source creates a light curtain with the aid of mirrors suitably located to direct the light path to a photodetector which controls the movement of the AGV. Fig. 2 shows the mirror modules 10 mounted to the underside of the AGV. Mirror module 10 is comprised of extension arms 11 and 12 suitably positioned to be externally actuated by engagement means 13 and disengagement means 14. Arms 11 and 12 are kept under tension by spring motor means 15, linked by cable means 18, attached to arm 12, having common cable link 17 attached to arm 11. In operation, extension means 13 upon being actuated, will cause cable 18 to extend arm 11 by exerting a pulling force at 19, causing cable 17 to also extend outward. Cable 17 outward movement will cause arm 12 to extend outward with aid of pulleys 20 and 21 and tension on cable 16 by spring motor
15. The retracting operation will operate in a reverse manner upon actuating retracting means 14.

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