Self-locking guillotine door

An animal enclosure with a self-locking guillotine door assembly, the animal enclosure comprising:

• a plurality of walls including a door wall, where the plurality of walls separates an enclosure interior from an enclosure exterior;
• a right door track and a left door track on the door wall;
• a guillotine door moveable vertically in the right and left door tracks;
• a locking mechanism attached to the guillotine door;
• a cable having a first end and a second end, wherein the first end is attached to the locking mechanism, wherein the second end is attached to a handle;
• wherein when the handle is manually pulled, the cable releases the locking mechanism and lifts the locking mechanism and the guillotine door to allow access between the enclosure interior and exterior through the guillotine door;
• but when the guillotine door is pushed up from the bottom, the locking mechanism locks in response to the pushing up of the enclosure door from the bottom by causing at least a portion of the locking mechanism to move horizontally into binding engagement with at least one of the right door track or the left door track and thereby resists lifting of the guillotine door.

A self-locking enclosure door method for an animal enclosure, the method comprising:

• pulling a handle of a cable coupled to an enclosure door having a top and a bottom, wherein the cable is coupled to the enclosure door at a first end of the cable, wherein the handle is disposed at a second end of the cable;
• lifting a vertical slide by the pulling of the cable;
• lifting a slot of the vertical slide along a slide post until the slide post reaches a bottom of the slot by the lifting of the vertical slide, the slide post being connected to the enclosure door;
• releasing a locking mechanism by the lifting of the slot of the vertical slide;
• and
• engaging the locking mechanism by pushing up on the bottom of the enclosure door, wherein at least a portion of the locking mechanism moves horizontally outwardly from the enclosure door in response to the pushing up on the bottom of the enclosure door.