Frame feeding system and frame feeding method
In recent years, frames have gotten larger in size and thinner, and warping of the frames has posed a problem. If a warp of a frame is large, there is a high possibility that fetching the frame may fail. If fetching the frame fails, that is, if the frame cannot be fetched, the lead time of mounting gets longer. Further, the frame that cannot be fetched has to be manually removed by an operator. Therefore, a man-hour increases. According to the present invention, before a loader feeder fetches a frame from a frame magazine, a loader lifter is moved in a Y direction. Thereafter, the loader feeder fetches the frame from the frame magazine.
1. A frame feeding system comprising:
a loader lifter including an elevating drive that elevates or drives a frame magazine, which accommodates frames, in Z directions;
a loader feeder that fetches a frame from the frame magazine;
a main feeder that carries the frame fetched by the loader feeder to a work area; and
a control unit that controls the loader lifter, loader feeder, and main feeder, wherein
the loader lifter further includes a first moving mechanism that moves the frame magazine a predetermined first distance in Y directions;
the control unit controls the first moving mechanism of the loader lifter so as to move the frame magazine the first distance in the Y direction;
the control unit then controls the loader feeder so as to clamp a frame with claws of the loader feeder and take out the frame;
the control unit then controls the main feeder so as to carry the frame to the work area;
the loader lifter further includes a second moving mechanism that moves the frame magazine a predetermined second distance up and down in the Z directions;
the control unit includes a frame detection instrument that detects presence or absence of a frame clamped with the claws of the loader feeder;
after the control unit controls the loader feeder so as to clamp the frame with the claws of the loader feeder, the frame detection instrument detects presence or absence of the frame;
if the frame is not detected, the control unit controls the second moving mechanism of the loader lifter so as to move the frame magazine the second distance up and down in the Z directions; and
the control unit then controls the loader feeder so as to clamp the frame with the claws of the loader feeder and take out the frame.
2. The frame feeding system according to claim 1 , wherein the second moving mechanism repeats the up-and-down movement of the second distance a plurality of times.
3. A frame feeding system comprising:
a loader lifter including an elevating drive that elevates or drives a frame magazine, which accommodates frames, in Z directions;
a loader feeder that fetches a frame from the frame magazine;
a main feeder that carries the frame fetched by the loader feeder to a work area; and
a control unit that controls the loader lifter, loader feeder, and main feeder; and
a frame detection instrument that detects presence or absence of a frame clamped with the claws of the loader feeder;
the loader lifter further includes a first moving mechanism that moves the frame magazine a predetermined first distance in Y directions, and a second moving mechanism that moves the frame magazine a predetermined second distance up and down in the Z directions;
the control unit controls the first moving mechanism of the loader lifter so as to move the frame magazine the first distance in the Y direction;
the control unit then controls the second moving mechanism of the loader lifter so as to move the frame magazine the second distance up and down in the Z directions; and
the control unit then controls the loader feeder so as to clamp a frame with claws of the loader feeder and take out the frame, and if the frame is not detected, the control unit controls the second moving mechanism of the loader lifter so as to move the frame magazine the second distance up and down in the Z directions; and
the control unit then controls the loader feeder so as to clamp the frame with the claws of the loader feeder and take out the frame.
4. The frame feeding system according to claim 3 , wherein the second moving mechanism repeats the up-and-down movement of the second distance a plurality of times.
5. A frame feeding method for a frame feeding system, which includes a loader lifter having an elevating drive that elevates or drives a frame magazine, which accommodates frames, in Z directions, a loader feeder that fetches a frame from the frame magazine, and a control unit that controls the loader lifter and loader feeder, and includes a frame detection instrument that detects presence or absence of a frame clamped with the claws of the loader feeder, comprising the steps of:
moving the frame magazine a predetermined first distance in a Y direction;
clamping a frame with claws of the loader feeder;
taking out the frame;
detecting presence or absence of the frame within the claws of the loader feeder after moving the frame magazine the first distance;
if the frame is not detected at the step of detecting presence or absence of the frame, moving the frame magazine a predetermined second distance up and down in the Z directions; and
taking out the frame.
6. The frame feeding method according to claim 5 , wherein at the step of moving the frame magazine the second distance, the up-and-down movement is repeated a plurality of times.
7. A frame feeding method for a frame feeding system, which includes a loader lifter having an elevating drive that elevates or drives a frame magazine, which accommodates frames, in Z directions, a loader feeder that fetches a frame from the frame magazine, and a control unit that controls the loader lifter and loader feeder, and includes a frame detection instrument that detects presence or absence of a frame clamped with the claws of the loader feeder, comprising:
moving the frame magazine a predetermined first distance in a Y direction;
moving the frame magazine a predetermined second distance up and down in the Z directions;
clamping a frame with claws of the loader feeder;
taking out the frame;
detecting presence or absence of the frame within the claws of the loader feeder;
if the frame is not detected, moving the frame magazine the predetermined second distance up and down in the Z directions, and clamping a frame with the claws of the loader feeder; and
taking out the frame.
8. The frame feeding method according to claim 7 , wherein at the step of moving the frame magazine the second distance, the up-and-down movement is repeated a plurality of times.