SI9700042A - Device for producing frontal wedge or gear joints for longitudinal joining of workpieces and joints produced with it - Google Patents

Abstract

At least one processing system (1) consisting of at least one circularly rotating drum (4) with one or more tension pieces (5) on its periphery is positioned between a horizontally and straight moving supply conveyor (2) and a discharge conveyor (3). The processing system has at least one processing units (7,8) and at least one auxiliary conveyors (9,10). The tines (32) and the inbetween grooves (33) in the end connecting surface of a work piece (11), and the tines (32.1) and inbetween grooves (33.1) together forming the end connection (35) are arranged so that the tines and grooves from the end are curved or radially concave.

Description

DEVICE FOR MAKING FRONT VEHICLES OR TOOTH JOINTS, FOR LONG JOINING OF WORKERS AND JOINT MANUFACTURED WITH THIS DEVICE

The subject of the invention is a device for the manufacture of front wedge or toothed joints, for longitudinal joining of workpieces and a joint made with this device, and more specifically the machines for the manufacture of toothed joints, as well as the process of making these joints, and the joints are made with them and are furthermore machines for making grooves or grooves for jointing at least two, preferably elongated, wood workpieces of different dimensions.

According to the international patent classification, the invention is envisaged in B 27F 1/12 and additionally in B 27F 5/02 and B 27F 1/16.

A technical problem solved by the invention is the construction of a device that will allow the production of front wedge or toothed joints at both ends of several workpieces of varying lengths, which will flow through the processing units in a circular way at a constant speed, without intermittent interruptions, or without alternating working cycles, wherein each front contact surface will be machined to provide a continuous or tangential transition between two jointly joined workpieces, whereby the teeth and grooves in each front joint are radially concave or separately and the joint will prevent the lateral and vertical displacement of the jointed workpieces, the joints will be accurately and uniformly or in harmony, the loss of material will be minimal, while at the same time the construction will be easy and the workpiece of different lengths and different, even very large sections, will be machined.

There are quite a few known solutions for devices or machines for making frontal toothed or wedge joints for sequential joining of two or more workpieces. The most famous German manufacturers of such machines or devices are Dimter, Grecon and KL, as well as the Italian manufacturers Omga and Revelli Legno, whose devices are designed to essentially enable them to operate in three basic ways. The first known solution is characterized by a fixed machining unit with a work tool, a circular saw and a milling cutter, with which the individual workpieces are machined first on one and then on the other front, whereby the workpiece travels past or along the machining unit in a transverse direction. In another known embodiment, workpieces traveling in a longitudinal direction in a longitudinal direction are stopped and clamped in a clamping device just in front of the machining unit moving in a transverse or vertical direction. The processing unit first processes one workpiece face, which then moves in a straight line, in the forward direction, and then processes its second face. A third known example solves the manufacture of the front joining surfaces of workpieces in such a way that the workpieces are first assembled along the side guide bar in front of the workpiece. When their number reaches a predetermined amount, the clamping device is activated and several workpieces are clamped together. The workpiece is then straightened to the workpieces in a straight line and produces frontal grooves on that side. The clamping device is released and the workpieces travel in a straight line, moving forward. In the meantime, the workpieces, with the help of a conveyor or roller conveyor, align themselves face-to-face with the side guide rail at the other end and the operation of making the front grooves is repeated. All three of the known solutions described are characterized by the fact that the double-sided production of the front grooves is followed by the application of adhesive for the toothed joint surfaces, then longitudinal pressing and gluing, and finally the cutting of the workpieces to specified lengths. A common feature of all the above solutions is the processing time in working cycles, which limits the capacity of these machines or machines, since the working cycle determines in advance the number of treatments in a given time unit. Another disadvantage or disadvantage of the known solutions are also deviations or errors in the positioning of the workpiece prior to being engaged in the clamping devices, which inevitably results in inaccurate and poor quality of the frontal machining and thus inaccurate toothed joint surfaces, resulting in poorly executed joints between the workpieces, larger or smaller fracture longitudinal center axes of two connected workpieces, in series, resulting in unevenness or curvature of workpieces in succession. The latter requires large additions to the material for surface treatment after completion of longitudinal joining of workpieces and their cutting to specified lengths. Another disadvantage or disadvantage of these known solutions is that they are suitable or usable for the production of front toothed joint surfaces into workpieces of smaller cross-sections used in the furniture, upholstered furniture industry and for the manufacture of glued panels, but not suitable for longitudinal production glued structural supports of larger sections.

According to the invention, the problem is solved by a device for making frontal wedge or gear joints, for longitudinal joining of workpieces and with a joint made with this device, which essentially consists of a linear moving feed conveyor, a circular moving processing assembly and a linear moving removal conveyor, wherein the workpiece is a prism-shaped workpiece with a multifaceted base surface, on which a clamping device with auxiliary conveyors and machining units is mounted around the circumference, and the joint between the workpieces is radially concave or separate. More specifically, the invention will be described in the preferred embodiment and in the drawings showing:

Fig. 1 shows the device according to the invention in rectangular projection and side view, Fig. 2 in the same way as Fig. 1, only in top view; Fig. 3 is a longitudinal section AA of a workpiece assembly, in the area of workpiece engagement and machining from one front side, Fig. 4, same as in Fig. 3, only in view P-from above, Fig. 5 longitudinal section BB of the workpiece assembly, in the mounting area, after the workpiece is transversely moved, to the position before machining the other front, Fig.6 longitudinal section CC of the workpiece part, in the area of workpiece mounting and machining on the other front, Fig. 7 in the same way as in Fig. 6, only in view R-from above, Fig. 8 toothed workpiece face in isometric projection, Fig. 9 same as in FIG. 8, only in front view; FIG. 10 is a joint of two workpieces, in rectangular projection and side view, FIG. 11 in the same way as in FIG. 10, in isometric projection only, FIG. 12 is a length joint of two workpieces, in rectangular projection and side view.

It is apparent from FIGS. 1 and FIG. 2 that the device for the manufacture of frontal wedge or toothed joints for the long joining of workpieces is formed by the machining assembly 1, the feed conveyor assembly 2 and the withdrawing conveyor assembly 3. The machining assembly 1 is positioned between the feed conveyor assembly 2 on one side and between the assembly of the conveyor conveyor 3 on the other side, the assembly 2 and 3 being perpendicular to the longitudinal axis 37 of the assembly 1, in that the assembly 2 is in the same plane with the center of the assembly 1 and the assembly 3 lies in a plane, which is equal to or slightly lower than the lower end point of assembly 1. The longitudinal axes of assemblies 2 and 3 are therefore intersected with the longitudinal axis 37 of assembly 1.

The workpiece 1 is formed by a rotary drum 4, which is circularly movable with a longitudinal axis 37 in the bearing 36 and is fixed to it via a support frame 6, and is further formed by clamping devices 5 attached to the circumference of the rotary drum 4 and the processing units 7 and 8 and auxiliary conveyors 9 and 10, which are fixedly mounted on a non-illustrated and undescribed device housing according to the invention. In the preferred embodiment shown in FIG. 1 and FIG. 2, the device according to the invention comprises eight clamping devices 5, two machining units 7 and 8, and two auxiliary conveyors 9 and 10, with the rule that the device according to the invention contains so many clamps of devices 5, insofar as there are flat surfaces on the circumference of the rotary drum 4 formed by its polygonal base planes, and which are in the shown embodiment 8-octagonal in such a way that they form a mantle of the rotary drum 4 having eight straight, preferably equal, flat planes. In another embodiment, the base surfaces may form any polygon, preferably with an even number of angles, the device according to the invention may comprise at least one, two or more clamping devices 5, at least one or more processing units 7 and 8, and at least one or several auxiliary conveyors 9 and 10. Preferably, the processing unit 7 is mounted on the housing of the device so that it is located in the plane of the vertical axis of the rotary drum 4, and the processing unit 8 is in the plane of its transverse axis, both of which may be otherwise positioned. The auxiliary conveyor 9 is preferably positioned in front of the machining unit 7 and the auxiliary conveyor 10 in front of the machining unit 8 when viewed in the direction of rotation of the rotary drum 4, both of which may be otherwise positioned. The direction of rotation of the rotary drum 4 is clockwise in the preferred embodiment shown. In another embodiment, the rotary drum 4 may also be rotated in the opposite direction, the component assemblies of the device according to the invention following or being arranged in a mirror sequence. The machining unit 7 and the auxiliary conveyor 9 are positioned along one front or base surface of the rotary drum 4, while the machining unit 8 and the auxiliary conveyor 10 are longitudinally offset from its second base plane, in such a sequence that the auxiliary conveyor 9 and 10, respectively. in front of the processing unit 7 and 8, respectively, as shown in FIG.

The clamping devices 5 are, as shown in FIG. 1 and FIG. 2, consisting of a two-pronged fork 34 with an intermediate, elastically clamped conveying roller 27 and of a clamping cylinder 20 which closes and opens the fork arms 34 and the fixed backrest 31, which is shown in FIG. 1, FIG. 4 and FIG. 7.

The machining units 7 and 8 consist of a profile milling cutter 18 and 23, a circular saw 19 or 22, a roller adhesive applicator 21 and 24, and a profile backing plate 25 or 26, with a lateral guide bar 17 in front of the processing unit 7, in front of the processing unit. 8 is a side guide rail 28, both of which are mounted and fixed to the wall of the non-shown housing, as shown in FIGS. 4 and 7.

The profile backing plate 25 is fixed to the pressure plate 38 of the clamping cylinder 20, on the side of the profile cutter 18 of the machining unit 7, and is mounted perpendicularly to the base surface of the rotary drum 4. The profile backing plate 25 has at least one side edge, profile serrated throughout . The non-shown profile serrated edge of the backing plate 25 is designed in such a way that the non-shown teeth and intermediate grooves of radially concave or separate shape are made therein. The toothed edges of the backing plates 25,26, when rotating the rotary drum 4, together with the workpiece 11, travel along profile cutters 18,23. In the same manner described above, a profile support plate 26 is provided, which is fixed to the pressure plate 38 of the clamping cylinder 20 on the side of the profile cutter 23 of the processing unit 8.

The longitudinal axes of the profile cutters 18 and 23 are each inclined by an angle of β against the front face of the rotary drum 4, which also applies to the associated circular saws 19 and 22 with not shown cut-off shredders and the associated adhesive applicators 21,24.

The assembly of the conveyor conveyor 2 is formed, as can be seen from FIG. 1 and FIG. 2, by an endless conveyor chain 12 driven by non-shown chain wheels driven by a non-displayed electric motor, mounted on the couplers 13, by a transverse roller conveyor 14, which is also driven by a non-displayed electric motor. and lateral rest 16. On the periphery of the sheath of the rotary drum 4 and in the region of the clamping devices 5, the washers 29 and 30 are fixed and fixed to each other at the edge of the sheath, of which the plate 30 is of slightly greater thickness or height than the plate 29 In another embodiment, one or more washers 29 and 30 may be attached, as shown previously in FIGS. 3, FIG. 5 and FIG. 6.

Fig. 8 and Fig. 9 show a wedge or toothed joint surface, on one of the ends of workpieces 11 thus treated, respectively.

11.1. The teeth 32 and 32.1 and the intermediate grooves 33 and 33.1 are radially concave or separately, due to the circular path of the workpieces 11 and 11.1, clamped in the clamping devices 5 on the rotary drum 4, through the machining units 7 and 8 or along the profile milling cutter 18 and 23.

In FIG. 10 and FIG. 11 shows a front joint 35 between two workpieces 11 and 11 in length, with a clearly visible, separate, radial concave design made possible by teeth 32, 32.1 and grooves 33, 33.1 in the same manner, in both joint surfaces of the joined ends. workpieces 11 and 11.1, the number of joints 35 being dependent on the number of jointed workpieces 11 and 11.1, respectively, by length. The radially concave or separate embodiment of the joints 35 makes them reinforced when viewed in the transverse direction of the joint 35 in such a way that it is practically impossible to laterally or vertically move one of the workpieces 11 or 11.1, in a previously compressed and glued joint 35, in the x or y axes.

The extraction conveyor 3, which is located behind the machining assembly 1, has a catcher 15 attached to the rotary drum 4 to intercept the workpieces 11 which fall freely or with the help of ejectors from the clamping devices 5.

The device according to the invention works by having the workpieces 11 travel on the conveyor 2 towards the workpiece 1. The workpieces 11 lie on the conveyor 2 in the transverse direction, between transversally mounted catchers 13, which are fixed to the endless transport chains 12. When the workpiece 11 arrives to the transverse roller conveyor 14, it is transversely driven so that the workpiece 11 with the face face rests against the side abutment 16. In such a position, the workpiece 11 travels to the fixture 5 on the rotary drum 4 of the machining assembly 1; the process can be seen in FIGS. The forks 34 are then gripped by the workpiece 11 and, due to the rotation of the rotary drum 4, carried under the auxiliary conveyor 9, which is pressed against or on the washer 29.30, as can be seen in FIGS. 3 and 4. The workpiece 11 thus proceeded from a straight-line movement, following the feed conveyor 2, to a circular or rotational motion on the workpiece 1 or on its rotary drum 4. Since the base plate 30 is slightly higher than the plate 29, the workpiece 11 lies thereon, that it is inclined at a certain acute angle a against the circumferential surface of the rotary drum sheath 4, as shown in FIG. Then, the clamping cylinder 20 compresses the forks 34 of the clamping device 5, and thus, through the pressure plate 38, the workpiece 11 is attached to the elastically clamped transport rollers 27, which, due to the pressure, extend and submerge between the legs of the fixed backrests 31 so that they lie in the same plane. The workpiece 11 is firmly clamped into the clamping device 5 by rotation of the drum 4 to the machining unit 7, along the side guide rail 17, to a circular saw 19 with a non-shown waste shredder, as can be seen in FIG. 2 or Fig. 4. The workpiece 11 is angled at a sharp angle a to the circumference of the rotary drum 4, whereby the profile milling cutter 18 adjacent to the rotary drum 4 is positioned so that its longitudinal axis and the circumferential surface of the rotary drum 4 have an angle of more than 90 ° with each other. The cutter 18 is inclined at an acute angle β, its longitudinal axis preferably forming a right angles to 90 ° with the longitudinal axis of the workpiece 11, as shown in FIG. 3, where this angle may also be greater than or less than 90 °. When the workpiece 11 reaches the circular saw 12, a front cut is made at one of its two ends. By further rotation of the drum 4, the workpiece 11 travels to and further along the profile cutter 18, which enters into its pre-cut surface of the tooth carving 32 with intermediate grooves 33. In the exit of the workpiece 11 from the profile cutter area 18, the role of the profile support plate is very important. 25, which provides a smooth cut of the profile milling cutter 18 also at the outlet edge of the workpiece 11, thereby preventing the tearing or tearing of its outlet edge. The latter ensures flawless quality of the joint surface, precision workmanship and material savings, since accessories for the final longitudinal surface treatment of the workpiece 11 may be minimal or not necessary at all. The previously described method of clamping the workpiece 11 in the clamping device 5 when it rests on the washers 29 and 30 at an angle a, and the inclination of the profile cutter 18 for the angle β, allows, in the case of length unevenness of the workpiece 11, outside the region of the clamping on the washers 29,30, the same frontal treatment is made so that at the front length joining of workpieces 11 and 11.1, after pre-bonding, a continuous or tangential transition between the joined workpieces 11 inll.l is achieved, as can be seen from FIG. 12.

Thus, the one-piece fronted workpiece 11 continues its circular path, whereby the clamping cylinders 27 are deactivated and the workpiece 11 is released and subsequently moved away from the fixed and elastically clamped transport rollers 27 away from the fixed backrest 31, as shown in FIG. 3 and FIG. 4. Thereafter, the drive of the conveyor rollers 27 is switched on, which move the workpiece 11 in the transverse direction or move it to the lateral guide rail 28. The auxiliary conveyor 10 presses the workpiece 11 against the washer 29 and 30, as can be seen in FIG. As noted previously, the plate 30 is slightly higher than the plate 29, which causes the workpiece 11 to be at a certain acute angle a, opposite the circumference of the rotary drum sheath 4. The workpiece 11 continues in a circular path to the processing unit 8, with clamping device 5 fixed at an angle a, as shown in Fig.6 and Fig.7. The profile cutter 23, in the machining unit 8, is slightly inclined to form a sharp angle β between its longitudinal axis and between the side or front wall of the rotary drum 4. It forms the longitudinal axis of the cutter 23 with the longitudinal axis of the workpiece 11 in the area of the washers 29, 30 is an angle of 90 ° with each other, in which in another embodiment it may be greater than or less than 90 °. In the described position, when the workpiece 11 is rigidly clamped in the clamping device 5, it reaches the circular saw 22 at the lateral guide rail 28, which performs a front cut at its other end, as can be seen from Fig. 2 and Fig. 7. The workpiece 11 proceeds circularly through the machining unit 8 or along the profile cutter 23, which slides the workpiece 11 together with the profile support plate 26 at the exit of the workpiece 11 from the profile cutter area 23. the effect of the backing plate 26 is described previously in the embodiment or role of the profile backing plate 25 next to the cutter 18 in the machining unit 7. After finishing the jointing surface also at the other end of the workpiece 11, the same travels in a circular fashion, with opposite rollers 27, in the area of the clamping device 5, deactivate and release the workpiece 11 which, due to its own weight and position in the circle of the rotating drum 4, falls freely or with the aid of undelivered ejectors from the clamping of the clamping device 5, with which the catcher 15 catches it. The workpiece 11 slides thereon onto a linearly moving conveyor 3, thus completing the process of the two-sided frontal treatment of the workpiece 11, which thus has a wedge or toothed joint at each end.

The profile support plates 25 and 26, attached to the associated pressure plates 38, are arranged or arranged on the machining assembly 1 such that the support plates 25 are mounted on one side and the support plates 26 on the other side of the rotary drum 4, adjacent to the base face ; in each transverse row of clamping devices 5 with clamping cylinders 20, the backing plate 25 is mounted on the cylinder 20 of one end clamping device 5 and the backing plate 26 on the cylinder 20 of the other end clamping device 5.

The previously machined workpieces 11 are prepared for the further process of interconnecting their lengths in an arbitrarily long series. On the treated and adhesive coated joint surface of workpieces 11, a jointing is carried out under pressure such that a joint 35 is shown between the two workpieces 11 and 11.1 in the series shown in FIG. 10 and 11. Due to the radial, concave or separate design of teeth 32 and 32.1 and intermediate grooves 33 and 33.1, the joint 35 is designed to prevent the lateral and vertical displacement of the two jointed workpieces 11 and

11.1. The joint 35 is consequently arranged such that the longitudinal axes of the two adjacent workpieces 11 and 11.1 joined by the joint 35 form an angle of 180 ° with each other.

The teeth 32 and the grooves 33 in the connecting surface of one and the teeth 32.1 and the grooves 33.1 in the connecting surface of the other workpiece 11 and 11.1, respectively, are in the frontal view separately and run parallel or symmetrical, as can be seen in FIGS. 8 and FIG.

In joint 35, the front teeth of the contact surfaces of the workpieces 11 and 11.1 must lie side by side so that the separate teeth 32 and 32.1 and the grooves 33, 33.1 are mutually consistent.

The rotary drum 4 in the machining assembly 1 is designed in the sense of an elongated elongated prism with arbitrary polygonal, consistent frontal base surfaces and is of arbitrary dimensions.

Due to the circular travel of the workpieces 11 through the previously described procedure of the two-sided frontal treatment and due to the constant continuous rotation or rotation of the workpiece 1, the device according to the invention provides a large flow capacity, which is due to its construction, which does not require intermediate stops and tact delays. Intermediate joints 35 are of high quality and precision, allowing precision joining of workpieces 11, 11.1 in length and thus saving, since smaller additions are required for final longitudinal planar machining after joining any number of workpieces 11, 11.1 of any length, in a series of any length .

The device according to the invention enables frontal machining of workpieces 11,11.1 of any cross section, from smaller to larger ones, whereby only one workpiece 11,11.1 of the same cross-section can be machined once the machining composition 1 is adjusted.

The design of the machining assembly 1 enables the rotary motion of the rotary drum 4 and thus the circular motion of the workpieces 11 clamped in the clamping devices 5 through or through the machining units 7 and 8, which is a very precise motion that permits deviation only in the event of a possible clearance of the 37 in axis 36.

The counterparts 13 on the feed conveyor 2 are rotated before the transition from the linear movement of the workpiece 11 to the circular motion, depending on the circular movement of the clamping device 5 on the rotary drum 4, which clamps the workpiece 11 and rotates in a moment when the endless transport chains 12 move forward and approach the next workpiece 11.

The device according to the invention is preferably intended for the frontal treatment of wedge or toothed joints on workpieces 11 of wood, without the use of other suitable materials being excluded.

The movement speeds of the conveyor 2, the machining assembly 1 and the conveyor conveyor 3 are synchronously synchronized.

Claims (12)

PATENT APPLICATIONS A device for making front or toothed joints, for longitudinal joining of workpieces and a joint made with this device, the device comprising a straight-moving moving and withdrawing conveyor with a fixed-mounted machining assembly and statically mounted associated clamping devices and machining units and formed of two opposing frontal toothed connecting surfaces of two workpieces in a row, in which the teeth and intermediate grooves are wedge-shaped and straight along their length, characterized in that there is a feed conveyor (2) between the horizontal and rectilinear; at least one machining assembly (1) comprising at least one rotary rotary drum (4) having at least one or more clamping devices (5) mounted and fixedly mounted on the circumference of its sheath (5) and comprising at least one or more processing units (7) and (8) and at least one or more auxiliary conveyors (9) and (10), the machining units (7,8) and auxiliary conveyors (9,10) being fixed to the non-shown housing of the device in such a way that they are radially mounted above or adjacent to the sheath rotary drum (4); that the teeth (32) and the intermediate grooves (33) are in the front joining face of one workpiece (11) and the teeth (32.1) and the intermediate grooves (33.1) in the front connecting face of the adjacent workpiece (11.1) that jointly form the front joint (35) , designed in such a way that the teeth (32,32.1) and grooves (33,33.1) are separately or radially concave in the frontal view. Apparatus according to claim 1, characterized in that the rotary drum (4) is designed as an elongated, prism with arbitrary consistent polygonal base surfaces, preferably having so many transverse arrays of clamping devices (5) attached to the circumference of its mantle. ), as many flat planes on the circumference of the mantle. Apparatus according to one of claims 1 or 2, characterized in that at least one processing unit (7) and at least one auxiliary conveyor (9) are arranged side by side, at least one processing unit (8) and at least one auxiliary conveyor (10) ) along the second front face of the rotary drum (4), preferably in such a sequence that the conveyor (9) lies in front of the unit (7), followed by the conveyor (10) lying in front of the unit (8). Apparatus according to claim 1, characterized in that the movement velocities of the feed conveyor (2), the machining assembly (1) and the withdrawing conveyor (3) are synchronously synchronized with each other in such a way that the workpieces ( 11) or (11.1) from a straight motion on the conveyor (2), without stoppage, to a circular motion on the assembly (1) and from it again to a straight motion on the conveyor (3). Device according to one of Claims 1 or 3, characterized in that at least one profile milling cutter (18) is located in the processing unit (7) and at least one profile milling cutter (23) in the processing unit (8) is facing one another in the mirror position , inclined by an angle (β) such that the longitudinal axes of the profile milling cutters (18,23) form, preferably with a circumferential longitudinal surface of the rotary drum (4), preferably melting at more than 90 ° with the longitudinal axis of the workpieces (11) and (11.1 respectively) ), however, form a real right angle. Device according to one of Claims 1, 3 or 5, characterized in that a profile support plate (25) is fixed perpendicularly to the profile cutter (18), fixed to the pressure plate (38) and perpendicular to the profile cutter (23). ) mounted profile backing plate (26), also fixed to the pressure plate (38), with two pressure plates (38) mounted in a transverse row of clamping cylinders (20), in clamping devices (5). on both end clamping cylinders (20), with the profile support plates (25) being positioned side-by-side and the profile support plates (26) adjacent to the second base surface of the rotary drum (4). Apparatus according to claim 6, characterized in that radially concave profile teeth with intermediate grooves of the same shape are provided into one larger surface of the profile support plates (25,26) and preferably along their entire length, with the support plates (25 , 26), with a profiled edge at one end thereof, extend into the toothed profile of the associated cutter (18) and (23), respectively, with minimal mutual clearance. Apparatus according to one of Claims 1 or 2, characterized in that, in the area inside each clamping device (5), they are mounted in series and in the longitudinal direction of the rotary drum (4) and are fixedly fixed to the circumference of the rotary drum sleeve (4). at least two washers (29.30) of different thickness such that the longitudinal axes of the workpieces (11) and (11.1) lying on them, respectively, form a sharp angle (a) with the circumference of the sheath of the rotary drum (4). Device according to one of Claims 1, 2, 5 or 8, characterized in that, within each of the clamping devices (5), there are so many resiliently fastened ones in series and in the same plane along the length of the rotating cylinder (4). transport rollers (27), insofar as they are provided with fixed supports (31), within which a single roller (27) is mounted, the transport rollers (27) being pressed laterally on the workpieces (11) and being rotated along the length of the rotary cylinder sheath ( 4) move in a straight line, once to the side of the processing unit (7), second to the side of the processing unit (8). Apparatus according to claim 1, characterized in that the extraction conveyor (3) has at least one trap (15) along the rotary drum (4) for intercepting the workpieces (11) and (11.1), respectively. Apparatus according to one of Claims 1 or 4, characterized in that the feed conveyor (2) has at least one, two or more transport chains (12), with any number of clippers (13). Joint according to claim 1, characterized in that the longitudinally connected workpieces (11) and (11.1) are jointly connected to the joint (35) so that their longitudinal axes form continuous or tangential intersecting in the same plane to form an angle of 180 °.