FI86908C - OPERATING EQUIPMENT FOR AUTOMATIC SAMMANFOGNING WITH RAETVINKLIGA RAMKONSTRUKTIONER - Google Patents

Description

ρ f O o O

"u y ao

Method and apparatus for automatic assembly of rectangular circumferential structures

The present invention relates to a method according to the preamble of claim 1 for automatically assembling rectangular circumferential structures.

According to such a method, the elongate bodies machined at both ends are joined together in an assembly device to form the desired circumference.

The invention also relates to an apparatus according to the preamble of claim 9 for automatically assembling rectangular circumferential structures.

In the construction industry, various frames are used in window and door openings and in the associated windows and doors. Typically, such perimeters are made of four different parts that are similar in pairs (2 + 2). The ends of the parts are tapped or punched so that they can be fitted together, the joint usually being reinforced by gluing and / or nailing.

According to the prior art, parts of these 2 + 2 frames (e.g. window frames) are produced in long series. For the manufacture of the perimeter, two per lengths of perimeter parts are always taken from the production warehouse and joined together in a jig which ensures the dimensions and rectangularity of the joint.

Assembling the perimeters automatically has been difficult because parts of the perimeter have to be picked up from stock heaps or similar intermediate stocks. A further difficulty with these prior methods has been that the parts of the perimeter that are joined together have been differently turned wood and a different part of the wood on each side of the joint, which is why the joint's moisture life has often broken the joint.

2 8 6 908

The object of the present invention is to eliminate the drawbacks associated with the prior art and to provide a completely new solution for the automatic assembly of rectangular circumferential structures.

This method is based on the parts of the circumference being fed into the assembly in the correct order, i.e. in the circumferential order of the circumference. In successive parts, the circumferential halves are then formed in pairs in the first position of the collecting device, which are moved to the second position by turning them 90 ° in the circumferential plane. The first half of each circumference is removed from this second position, it is turned 180 ° and connected to the second half of the circumference.

More specifically, the method according to the invention is mainly characterized by what is set forth in the characterizing part of claim 1.

The apparatus according to the invention, in turn, is characterized by what is set forth in the characterizing part of claim 9.

For the purposes of this application, the circumferential order of rotation means the order in which the parts of the circumference are in the assembled circumference when it is rotated clockwise or counterclockwise.

Depending on where you start, the order of rotation at the window frame can be, for example, a lower frame, a side frame, an upper frame and a side frame.

The parts of the perimeter can be put in the correct order for assembly by machining them with a rotary cutter as described in our co-pending patent application. In order to eliminate the problems caused by material differences, it is then advantageous to form the finite blank into a continuous blank, e.g. by finger joints, from which pieces of suitable length are cut. The pieces are machined with the necessary connecting parts in said machining device, after which the pieces are transferred to a feed conveyor and conveyed to the assembly apparatus according to the present invention.

3 86908

However, according to the present invention, it is also possible to use circumferential parts made by conventional techniques, which are then stacked separately on the feed conveyors in the correct order (i.e. in the order of circumferential rotation). The pieces are fed to the collecting device at least substantially in the longitudinal direction.

According to the invention, the collecting device comprises a first rotatable counter-unit with a planar surface (turntable) to which fixed abutments at right angles are extended, extending radially from the center of the surface to the edge of the turntable. The stops or protrusions are bounded by four rectangular compartments, one compartment at a time being brought into the first position of the collector. In the first position, a compartment half is assembled in the compartment, after which said compartment is moved from the first station to the second station by rotating the counter unit in the circumferential plane 90e about the central axis.

The equipment has actuators for both rotating the turntable and pushing the pieces together.

Usually, the first circumferential half is transferred to the second counterpart unit in a lateral movement by means of a transfer device. The second counterpart unit is rotated 180 ° in the plane of the circumferential half, after which the half thus turned is laterally displaced back to the first counterpart unit by means of a third transfer device, where it is connected to the second half of the unit. The first counter unit is then rotated once more to bring the finished perimeter 90 # to a discharge station, where the perimeter is removed from the rotating table and passed on for possible finishing, such as surface treatment, glazing and the like.

The flat table is rotated 90 ° after the first and third pieces of the perimeter have been fed into the compartment preceding the compartment in the first position.

By means of the invention, it has been possible to eliminate the disadvantages of the prior art presented at the outset. Of the advantages of our solution, it is worth mentioning in particular that the automatic assembly of frames in series production can take place even if each of the successive frames is different.

In the following, the invention will be examined in more detail by means of an application example with reference to the accompanying drawings, in which Figures la-id show a top view of the principle of operation of the method according to the invention step by step (A-L).

The parts of the perimeter coming from the processing device are in the correct order, e.g. in the case of a window frame, first a lower frame 1a, then a side frame Ib, then an upper frame le and finally a second side frame Id per frame.

From the feed conveyor 2, the first piece 1a of the circumference is fed in the longitudinal direction onto the turntable 3 next to the projection 4. The piece 1a is pushed forward into the compartment 4-5 in front of it until its end hits the perpendicular projection 5. The turntable 3 is then turned 90 'around the center of its plane, whereby the first piece 1a is also at a 90 degree angle to the longitudinal direction of the pieces Ib to Id . The feed groove 2 'of the pieces is moved by the thickness of the protrusion 4 in the direction of rotation of the table 3, and the next piece ib is then fed from the conveyor 2 to the same compartment 4-5. Glue is sprayed on the end of the piece. The pieces 1a and ib are fastened to each other by pushing the connecting part of the latter piece Ib overlapping the connecting part of the previous piece 1a with a constant torque.

The feed groove 2 'is then moved back to its previous lateral position, where it feeds the third piece le to the next tray 7-4.

The turning table 3 is now turned 90 'around its center, whereby the finished circumferential half 1a. Ib moves behind the newly fed body le to another position. From this position, the first circumferential half is removed and slid against the second cross-stop 8. This latter response is inverted 180 ', after which the responses are pushed together. The second position of the turntable now has a new circumferential half le, id, which moved from the first position to the second approximately at the same time as the second stop 8 was turned 180 '. Pushing the stops together provides the final circumferential joint la-Id, while creating a third circumferential half le, lf in the first counter unit as described above.

The turntable 3 is then turned 90 ° around its center, whereby the finished perimeter 1 moves to the third position, from where it is removed from the turntable. At the same time, the third circumferential half-l1, lf is moved against the second cross-response 8 and the fourth circumferential half lg, lh is assembled in the first position. The first two pieces li, lj of the third circumference are waiting their turn on the feed conveyor 2.

In order to be able to check the dimensions of the circumferential structure and to have confidence that the perimeter has been assembled to the end, i.e. that the joints have been pushed to a sufficient depth, the cross-dimension is checked automatically. The cross-dimension can be calculated from the lengths of the two elements, taking into account the depth of the joints.

Similarly, since the ratio of the short side and the long side of the circumference is already known in advance, the direction of the oblique vector shown in step H is always calculated to be correct, in which direction the moment pushes the semi-blanks into one circumference.

Claims (9)

6 86908 A method for automatically assembling rectangular circumferential structures, which method comprises joining elongate bodies (1a - Id) machined at both ends together in an assembly device to form a desired circumference, characterized in that - the bodies (1a - Id) are fed to the assembly device (3-8) in succession , - in the first position (3-7) of the assembly device, successive pieces (1a - Id) are joined in pairs to form the first and second rectangular circumferential halves (1a, 1b; le, Id) of the frames to be manufactured, - each circumferential half (1a, 1b; le, Id) moving from the first position to the second position by rotating it in the circumferential plane 90 ', - removing the first half (1a, ib) of each circumference from the second position and rotating 180 ° in the circumferential plane, then - moving the first half (1a, Ib) of each circumference without changing its orientation parallel to the level om aa against the second half of the circumference (le, Id) in the second position and the ends of the halves are joined together to form a circumference. Method according to Claim 1, characterized in that the bodies (1a to Id) are fed at least substantially longitudinally to the collecting device (3 to 8). Method according to Claim 1 or 2, characterized in that the second circumferential half (1e, Id) is moved to the second position at least approximately simultaneously when the first half (1a, 1b) is turned 180e. Method according to one of the preceding claims, characterized in that 7 86908 first rotatable counterpart units (3 to 7) are used as the collecting device, in which the rectangular projections (4-7) on the planar surface (3) delimit four compartments, one compartment at a time , whereby a circumferential half is assembled, after which said compartment is moved from the first position to the second position by rotating the counterpart unit in the circumferential plane 90e about its central axis. Method according to Claim 4, characterized in that - the first circumferential half (1a, Ib) is moved laterally from the second position to the second counter unit (8), - the second counter unit (8) is rotated 180 ° in the plane of the circumferential half, and - the second counter unit ( 8) is moved laterally against the first counter unit (3-7) to push the first circumferential half (1a, Ib) against the second half (le, id) to join the halves to each other in said second position. Method according to Claim 4 or 5, characterized in that the first counter unit (3 to 7) is rotated once more after assembling the circumference to bring the finished circumference (1a - Id) into the discharge station. Method according to one of Claims 4 to 6, characterized in that the first counter unit (3 to 7) is rotated 90 ° after feeding every second piece, preferably in the order of rotation of the first (1a) and third (Ic) pieces of the circumference. Method according to one of Claims 4 to 7, characterized in that the first (1a) and the third body (Ic) of the circumference are fed in the compartment preceding the compartment in the first position, respectively. Apparatus for the automatic assembly of rectangular circumferential structures, characterized in that it β 86908 comprises - a first rotatable counter-unit (3 to 7) with four compartments delimited by rectangular projections (4-7), - a first transfer device (2) by means of which the circumferential bodies (la - Id) can be fed longitudinally to the desired compartment of the first counter unit (3 - 7), where the pieces can be connected in pairs to produce halves (1a, Ib; le, Id) of circumferential structures, - actuators for rotating the first counter unit (3-7) up to 90 ° one at a time around its central axis after the completion of each circumferential half (1a, 1b; le, Id) and after the feeding of the first body (1a) of each circumference, - a second counter unit (Θ) rotatable about its central axis, - a second transfer device by means of a first counter unit (3-7) assembled circumferential halves (la. Ib) void if it is desired to move from the first counter unit to the second counter unit (8), - actuators for rotating the second counter unit (8) 180 ° at a time about its central axis to rotate the circumferential half (1a, Ib) 180 °, and 8) the first (3-7) counter unit for assembling the perimeter. Apparatus according to claim 9, characterized in that the third transfer device is adapted to transfer the second counter unit (8) against the first counter unit (3-7). 9 86908