| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a welding device for a pallet by setting a positioning block to be movable upward downward and forward rearward, and causing horizontal ribs formed at the upper and lower ends thereof to contact with the side face in the proximity of the face of an upper deckboard and the side face in the proximity of the rear face of a lower deckboard. SOLUTION: When positioning an upper deckboard 1 and lower deckboard 2, a vertical cylinder 6a is operated to raise a piston rod 6e for allowing a piston rod 6e to be moved upward to a predetermined position. In the next place, a horizontal cylinder 6c is worked to move a piston rod 6d forward in order that each corner of the upper deckboard 1 and lower deckboard 2 is fitted in the recess part 6f of the positioning block 6e. From the upper and lower ends of the positioning block 6e, horizontal ribs 6g are set projectingly to the recessed part 6f side, and the horizontal ribs 6g are constructed so that they come in contact with the side face in the vicinity of the face 1a of the upper keyboard 1 and the side face in the vicinity of the rear face 2a of the lower deckboard 2. |
