Purge device
A purge device includes a placement section on which a container is placed by a transfer device, a purge nozzle provided in the placement section, a controller configured to perform control to execute a purging process in which purge gas is supplied through the purge nozzle into the container placed on the placement section, and an entry detection sensor configured to detect the entry of the transfer device or the container to the space directly above the placement section from a front side or a depth side of the placement section when the transfer device causes the container to enter the space directly above the placement section. Based on the detection results of the entry detection sensor, the controller performs control to discharge the purge gas from the purge nozzle before the purging process is performed.
1 . A purge device comprising:
a placement section on which a container is placed by a transfer device;
a purge nozzle provided in the placement section;
a controller configured to control and execute a purging process in which purge gas is supplied through the purge nozzle into the container placed on the placement section; and
an entry detection sensor configured to detect an entry in the horizontal direction of the transfer device or the container to a space directly above the placement section by detecting a sliding operation of the transfer device or the container in the horizontal direction, when the transfer device causes the container to enter the space directly above the placement section from a front side or a depth side of the placement section,
wherein the controller is configured to control, based on a detection result of the entry detection sensor, to discharge the purge gas from the purge nozzle before the purging process is performed.
2 . The purge device according to claim 1 , further comprising a loading sensor configured to detect that a container having been placed on the placement section, and the controller executes the purging process based on the detection result of the loading sensor.
3 . The purge device according to claim 1 , wherein
the placement section is a shelf plate suspended by a plurality of suspension members from a ceiling section in a storage rack,
the entry detection sensor includes a light projector configured to emit light and a light receiver configured to receive light from the light projector,
either one of the light projector and the light receiver is attached to the suspension member located on a front side of the placement section, and
the other of the projector and the light receiver is attached to the suspension member located on the depth side of the placement section.
4 . The purge device according to claim 1 , wherein
the placement section is a shelf plate suspended by a plurality of suspension members from a ceiling section in a storage rack,
the entry detection sensor includes a light projector/receiver configured to emit light and receive reflected light reflected by a reflector of the transfer device in response to the emission, and
the light projector/receiver is attached to any of the plurality of suspension members.
5 . The purge device according to claim 1 , wherein the entry detection sensor detects entry of the transfer device to the space directly above the placement section.
6 . The purge device according to claim 1 , comprising an approach detection sensor configured to detect the transfer device or the container approaching the placement section from the space directly above the placement section.