Conveyance device, driven unit, auxiliary unit, and pallet

A driven unit forming a pallet to be conveyed by a conveyance mechanism, wherein

• the conveyance mechanism comprises:
• a pair of a first support frame and a second support frame provided so as to be parallel to each other, and configured to define a conveyance track of the pallet including a placement member on which a workpiece is placed;
• a driving unit provided on the first support frame and configured to apply a conveyance force to the pallet;
• and
• a stopping unit provided on the first support frame, including an engaging portion that engages with a portion of the pallet, and configured to temporarily stop a movement of the pallet at a predetermined stop position along the conveyance track,
• the driven unit is a unit that travels along a first guide portion of the first support frame by receiving the conveyance force from the driving unit,
• the pallet comprises the driven unit, the placement member, and an auxiliary unit connected to the driven unit via the placement member and configured to freely travel along a second guide portion of the second support frame,
• the driven unit comprises:
• a main body member to which the placement member is fixed;
• a plurality of rollers rotatably provided on the main body member and configured to abut against the first guide portion;
• a first engaging portion provided on a lower portion of the main body member and configured to frictionally engage with the driving unit to receive the conveyance force;
• and
• a second engaging portion provided on the main body member and configured to engage with the engaging portion of the stopping unit
• the first guide portion includes an outer guide surface and an inner guide surface in a widthwise direction of the conveyance track,
• the plurality of rollers include a plurality of guide rollers provided on a lower surface of the main body member so as to be rotatable around a vertical axis, and
• the plurality of guide rollers include an outer guide roller that abuts against the outer guide surface, and an inner guide roller that abuts against the inner guide surface.

A pallet to be conveyed by a conveyance mechanism, wherein

• the conveyance mechanism includes:
• a support frame configured to define a conveyance track of the pallet;
• a driving unit provided on the support frame and configured to apply a conveyance force to the pallet;
• and
• a stopping unit provided on the support frame, including an engaging portion that engages with a portion of the pallet, and configured to temporarily stop a movement of the pallet at a predetermined stop position along the conveyance track,
• the pallet comprises:
• a placement member on which a workpiece is placed;
• and
• a driven unit configured to travel along a guide portion of the support frame by receiving the conveyance force from the driving unit,
• the driven unit comprises:
• a main body member to which the placement member is fixed;
• a plurality of rollers rotatably provided on the main body member and configured to abut against the guide portion;
• a first engaging portion provided on a lower portion of the main body member and configured to frictionally engage with the driving unit to receive the conveyance force;
• and
• a second engaging portion provided on the main body member and configured to engage with the engaging portion of the stopping unit,
• the support frame includes a pair of a first support frame and a second support frame provided so as to be parallel to each other, and configured to define the conveyance track of the pallet;
• the driven unit is configured to travel along a first guide portion of the first support frame,
• the first guide portion includes an outer guide surface and an inner guide surface in a widthwise direction of the conveyance track,
• the plurality of rollers include a plurality of guide rollers provided on a lower surface of the main body member so as to be rotatable around a vertical axis, and
• the plurality of guide rollers include an outer guide roller that abuts against the outer guide surface, and an inner guide roller that abuts against the inner guide surface.