Veneer superimposing method

A veneer superimposing method using a veneer superimposition device in which a pre-gluing conveyor, a gluing device, and a post-gluing conveyor are disposed in this order from an upstream side in a conveying direction of a parallel veneer having a fiber direction parallel to a longitudinal direction of a veneer, and a cross veneer supply device which supplies a cross veneer having a fiber direction orthogonal to the longitudinal direction of the veneer to the pre-gluing conveyor is disposed on one lateral side of the pre-gluing conveyor,

• the pre-gluing conveyor being provided with a position adjusting mechanism capable of positioning the parallel veneer or the cross veneer in a reference position,
• the gluing device being provided with an adhesive applying roller capable of applying an adhesive to an upper surface of the parallel veneer or the cross veneer,
• the cross veneer supply device being provided with a main body including a lifting mechanism capable of lifting up and down in a state in which the cross veneer loaded in a predetermined position is sucked, and a moving mechanism which supports the main body so as to be movable onto the pre-gluing conveyor,
• the veneer superimposing method comprising:
• a parallel veneer standby step of allowing the parallel veneer having adhesive applied to the upper surface by the gluing device to stand by on the post-gluing conveyor;
• a cross veneer moving step of moving the cross veneer one by one from the predetermined position of the cross veneer supply device onto the pre-gluing conveyor;
• a cross veneer positioning step of positioning the cross veneer in a reference position of the pre-gluing conveyor;
• a cross veneer standby step of allowing the cross veneer that has been positioned to stand by in a position above the pre-gluing conveyor;
• a parallel veneer returning step of returning the parallel veneer in a standby state onto the pre-gluing conveyor;
• a parallel veneer positioning step of positioning the parallel veneer that has been returned in the reference position of the pre-gluing conveyor;
• a superimposing step of superimposing the cross veneer in a standby state on the parallel veneer that has been positioned;
• and
• a superimposed veneer gluing step of applying adhesive to the upper surface of the cross veneer on the parallel veneer.