The present invention relates to a gate frame for an automatic feeder, comprising: a frame； a pair of doors installed on fore-end of the frame to face each other. In addition, a connecting plate is formed on the top surface of the doors； an opening and closing device is installed at the top end of the frame to be slid in a horizontal direction to push or pull the connecting plate； and a locking device is installed at the top end of the frame and has a hanging member rotating up and down to be hung on the connecting plate. Thus, the opening and closing device can open the door by pushing the connecting plate. In the state, when livestock enters the inside of the frame, the door can be closed by the opening and closing device and at the same time, the hanging member of the locking device can be hung on the connecting plate, thereby preventing the livestock from opening the door and forcibly escaping out of the frame. Therefore, the gate frame for an automatic feeder can automatically lock a pair of doors by a hanging member of a locking device when livestock enters the inside thereof； can prevent forcible opening of the door since a connecting plate of the door is hung on the hanging member of the locking device； in particular, can prevent forcible escape of the livestock walking backwards therein to the outside due to blockage by the locked door； can prevent other livestock in the outside from opening the firmly locked door； and can allow the livestock therein to comfortably eat a feed without any interruption of other livestock, thereby improving reliability of the relevant product.본 발명은 자동급여기용 게이트 프레임에 관한 것으로, 틀 형상의 프레임 전단에 서로 대향되는 한 쌍의 도어를 설치하고, 이 도어의 상면에 연결판을 형성하며, 프레임 상단에 수평방향으로 슬라이딩 이동되어 연결판을 밀어내거나 혹은 당기는 개폐장치를 설치하고, 프레임 상단에 상, 하로 회동되어 연결판에 걸림되는 걸이부재를 형성한 잠금장치를 설치하여, 개폐장치로 연결판을 밀어내어 도어를 개방하되, 그 상태에서 프레임 내로 가축이 진입하면, 개폐장치로 도어를 닫음과 동시에 잠금장치의 걸이부재가 연결판에 걸림되도록 하여, 가축이 도어를 개방하여, 프레임 외부로 강제 이탈하는 것을 차단한다.본 발명에 따르면, 프레임 내로 가축 진입시 잠금장치의 걸이부재에 의해 도어가 자동 잠김되고, 도어의 연결판이
