A carrier transport system transports a plurality of carriers by a transport conveyor into a heating furnace, advances a comb-shaped carrier stopper having a plurality of protrusions toward the carriers, moves the carriers by the transport conveyor in a transport direction to engage cutout grooves,
A carrier transport system transports a plurality of carriers by a transport conveyor into a heating furnace, advances a comb-shaped carrier stopper having a plurality of protrusions toward the carriers, moves the carriers by the transport conveyor in a transport direction to engage cutout grooves, provided respectively for the carriers, with the protrusions of the carrier stopper to thereby position the carriers at a time. The carrier transport system advances the carrier stopper toward the carriers to insert distal ends of the protrusions of the carrier stopper into insertion holes, and then determines, on the basis of a moved distance X of the carrier stopper, whether the carriers are properly positioned.
대표청구항▼
1. A carrier transport system comprising: a plurality of carriers on which pieces of work are respectively mounted;a transport conveyor that transports the plurality of carriers;a heating furnace that covers part of the transport conveyor and that heats the pieces of work; anda positioning portion t
1. A carrier transport system comprising: a plurality of carriers on which pieces of work are respectively mounted;a transport conveyor that transports the plurality of carriers;a heating furnace that covers part of the transport conveyor and that heats the pieces of work; anda positioning portion that positions the plurality of carriers in the heating furnace, wherein:the heating furnace includes a plurality of heating devices for heating the pieces of work inside so that the plurality of heating devices are arranged at predetermined intervals in a transport direction in which the carriers are transported,each of the carriers has at least one engagement portion, andthe positioning portion includesa comb-shaped carrier stopper having a plurality of protrusions that are engageable with the engagement portions of the respective carriers;an actuating portion that moves the carrier stopper toward the carriers in order to engage the protrusions with the engagement portions;a moved distance detecting portion that detects a moved distance of the carrier stopper moved by the actuating portion; anda determination portion that determines, on the basis of the moved distance detected by the moved distance detecting portion, whether the carriers are properly positioned,wherein the engagement portions of the respective carriers are cutout grooves that are wider in the transport direction of the carriers than the protrusions,rear end portions in the transport direction of the cutout grooves respectively have insertion holes that allow distal ends of the protrusions to be inserted, andthe actuating portion may advance the carrier stopper so as to engage the protrusions with the cutout grooves and insert the distal ends of the protrusions into the insertion holes in coordination with transport operation of the transport conveyor,wherein the determination portion determines that the carriers are properly positioned when the moved distance exceeds a predetermined reference value, the reference value being a moved distance of the carrier stopper at a time when the distal ends of the protrusions start to be inserted into the insertion holes. 2. The carrier transport system according to claim 1, wherein after the protrusions are moved by the actuating portion to be inserted into the cutout grooves, the transport conveyor is transported to engage rear end surfaces in the transport direction of the cutout grooves of the carriers with the protrusions, and then the protrusions are moved by the actuating portion toward the carriers again to insert the distal ends of the protrusions into the insertion holes. 3. The carrier transport system according to claim 1, further comprising: a proximity detection sensor that detects proximity of the carriers; anda control portion that controls the actuating portion to drive the carrier stopper on the basis of information detected by the proximity detection sensor. 4. The carrier transport system according to claim 3, further comprising: a temporary holding mechanism that temporarily holds the carrier transported into the heating furnace,wherein the control portion controls a temporary stopper to drive the temporary holding mechanism. 5. The carrier transport system according to claim 1, wherein the engagement portion of each carrier is provided at each end in a direction that intersects with the transport direction, andthe carrier stopper is provided on each side in a direction that intersects with the transport direction. 6. The carrier transport system according to claim 5, wherein the actuating portion advances at least one of the carrier stoppers, located on both sides, toward the carriers to hold the carriers by the carrier stoppers located on both sides. 7. The carrier transport system according to claim 5, wherein at least one of the carrier stoppers located on both sides includes a rotation preventing portion that contacts parts of the carriers to prevent rotation of the carriers. 8. The carrier transport system according to claim 5, wherein: the engagement portion of each carrier is provided at each end in a direction that intersects with the transport direction in a horizontal direction, andthe carrier stopper is provided on each side in a direction that intersects with the transport direction in a horizontal direction. 9. The carrier transport system according to claim 1, further comprising a temporary holding mechanism that temporarily holds the carrier transported into the heating furnace. 10. The carrier transport system according to claim 1, wherein: depths of the insertion holes are longer than depths of the cutout grooves; andthe actuating portion may advance the carrier stopper so as to engage each of the protrusions with each of the cutout grooves. 11. A carrier transport system comprising: a plurality of carriers on which pieces of work are respectively mounted;a transport conveyor that transports the plurality of carriers;a heating furnace that covers part of the transport conveyor and that heats the pieces of work; anda positioning portion that positions the plurality of carriers in the heating furnace, wherein:the heating furnace includes a plurality of heating devices for heating the pieces of work inside so that the plurality of heating devices are arranged at predetermined intervals in a transport direction in which the carriers are transported,each of the carriers has at least one engagement portion, andthe positioning portion includesa comb-shaped carrier stopper having a plurality of protrusions that are engageable with the engagement portions of the respective carriers;an actuating portion that moves the carrier stopper toward the carriers in order to engage the protrusions with the engagement portions;a moved distance detecting portion that detects a moved distance of the carrier stopper moved by the actuating portion;a determination portion that determines, on the basis of the moved distance detected by the moved distance detecting portion, whether the carriers are properly positioned;the engagement portions of the respective carriers are cutout grooves that are wider in the transport direction of the carriers than the protrusions;rear end portions in the transport direction of the cutout grooves respectively have insertion holes that allow distal ends of the protrusions to be inserted;the actuating portion may advance the carrier stopper so as to engage the protrusions with the cutout grooves and insert the distal ends of the protrusions into the insertion holes in coordination with transport operation of the transport conveyor;the moved distance detecting portion detects a first moved distance that the protrusions of the carrier stopper move into the cutout grooves and a second moved distance that the protrusions of the carrier stopper move into the insertion holes; andthe determination portion determines, on the basis of the second moved distance detected by the moved distance detecting portion, whether the carriers are properly positioned.
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