Patent GB-1043123-A (GB)
Title: Apparatus for joining workpieces in end to end relationship
IPC: B27M3/00
Filed: 1964-02-05
Abstract: 1,043,123. Woodworking. G. GIESECKE, G. GIESECKE, K. GIESECKE, and H. GIESECKE, [trading as HUBEL & PLATZER]. Feb. 5, 1964 [Feb. 6, 1963; July 9, 1963], No. 4999/64. Heading B5L. An arrangement for uniting workpieces 27, Figs. 1 and 2, at their ends by means of a bonding agent, the workpieces consisting more especially of wood and having interengaging profiles at their ends, comprises supporting tables 7, 8 which are movable jointly along guideways 12, 13 with steadily advancing workpieces and are movable relatively towards one another to reduce the spacing between the workpieces so as to connect and and press the workpieces together. A frame 10 supports opposed guide channels 11 in which the guideways 12, 13 are longitudinally adjustable. Guideways 13 receive the rollers 17 of a supporting table 8 to which is connected guide rods 18 on which slides the supporting table 7 having rollers 16 running in the guideways 12. A cylinder 6 is secured to the frame 10 and has a piston 24 connected by a rod 23 and stirrup 25 to the rods 18 to effect the joint movement of the tables, and a cylinder 20 secured to the rods 18 and has a piston 21 connected by a rod 19 to the table 7 to effect the relative movement between the tables. Each table carries a clamping plate 28 operable to clamp the workpiece to the table by a piston-and-cylinder device 2, 5. Additional clamping plates 26 operated by manually-rotatable spindles 37 may be located on the guide rods 18. In operation, workpieces to be joined end to end are supplied in a line to a feed device 1 having driven rollers 38 which pass the workpieces beneath the clamping plates 28 at a constant speed. As soon as a join, or a number of joins if the workpieces are short, are between the tables, the devices 2, 5 are operated to cause the plates 28 to clamp the workpieces to the tables 7, 8 and the cylinder 6 is operated to assist the movement of the tables with the workpieces. The cylinder 20 is then operated to effect relative movement between the tables so as to press the ends of the workpieces together. After the desired pressure between the workpieces has been reached and a predetermined time has passed, the devices 2, 5 are operated to lift the clamping plates and release the workpieces and the tables 7, 8 are returned to their initial position by operation of the cylinders 6, 20. Transverse pressure elements 41, Fig. 7, may be operated in unison with the clamping plates 36 to prevent spreading of the sides 46, 47 of the join 45. High-frequency heating elements 44 may also be provided and operated at the same time as the clamping plates. In another embodiment, the rods 18 interconnect a pair of frames guided by rollers in the guideways 11, 12. The table 8 is fixed to one frame and the table 7 is supported by rollers in other frame, the pair of frames and rods being movable for the joint movement of the tables, and the table 7 being movable on its frame for the relative movement between the tables. In a further embodiment, the clamping plate for the table 8 is replaced by a retractable stop 63, Fig. 9, which positions the leading end of the line of workpieces so that, after they have been bonded together, saws 58, 59, 60 can be raised by devices 61 to cut the joined workpiece into predetermined lengths. The stop 63 may be fixed to the table 8 and the cut workpieces ejected laterally.