SI24309A - Connection making device - Google Patents

Abstract

Beam making device consisting of pieces (2) of wood interconnected at the front by wedge joints, from a transverse conveyor on the supply side, by means of which the pieces (2) of wood to be treated are fed , one after the other in the machining area, being fixed in the clamping tower (7) on the supply side after alignment and then, by means of a milling device supported by the construction group (9), cut and held movably in a vertical plane in the intermediate space (10) between the clamping tower (7) on the supply side and the clamping tower (6) on the discharge side along a closed curve, the wood being processed at the transition of the end of two consecutive pieces (2) of wood, so that after making profiles for wedge joint, applying glue and assembling performs compression. The device is distinguished by a compact construction, an easy path of passage of pieces of wood that can be optimized, and thus a high machining speed.

Description

CONNECTOR DEVICE

The invention relates to a device according to the introductory part of claim 1.

The production of composite elongated strands consisting of a plurality of individual, front-facing, wedge-shaped workpieces in the form of planks or beams of wood is generally known. For this purpose, the workpieces are fitted with mutually complementary profiles for the wedge joint on the front, in the way of milling, after the adhesive is applied, they are put together and pressed together so as to create a loadable connection. This manufacturing process is carried out in wedge-jointing devices, the central area of which, inter alia, comprises a milling device and a bow press.

The manufacturing process is necessarily characterized by numerous transport, clamping and straightening processes, which is also conditioned by the two-sided processing of individual pieces of wood. With the aim of achieving high flow, especially with the aim of minimizing the waiting times of the individual components of the machine, the organization and the timetable of the coordinated movement of movements associated with these processes is of particular importance, especially considering that they are connected in complete production facilities and adapted to their working tact.

The basic construction of such a device is known, for example, from DE 20 2007 006 813 Ul. This consists of a saw blade located on the feed side, namely in the direction of the flow of the wood to be treated, and to which the first longitudinal conveyor is connected, to which the end area cuts the wood individually after longitudinal alignment. the first, perpendicular to the first longitudinal conveyor of the extending transverse conveyor to the first milling station intended to create a wedge-shaped profile on one side of the pieces of wood, connecting the second longitudinal conveyor transporting in parallel, in the opposite direction to the first longitudinal conveyor , from which, after aligning the other side of the piece of wood, they come to you by means of a second transverse conveyor into the impact area • · of the other, to produce a wedge joint profile on the other side of the piece of wood. With the help of the second transverse conveyor, the pieces of wood are transferred to the pressing station after the front application of the adhesive, whose direction of transport a is parallel and in the same direction as the direction of the other longitudinal conveyor. The pressing station is characterized by the first clamping tower, which is firmly positioned at the end, the clamping roller on the inlet side and the second clamping tower between them, with both the clamping roller on the inlet side and the second clamping tower arranged movably in the direction of movement of the compression station and opposite direction. Compression of the front glued pieces of wood is carried out between the clamping towers, namely by moving the movable second clamping tower towards the first clamping tower. During this squeeze, a further front-glued piece of wood can be brought into the inlet area of the squeeze station by means of a second transverse conveyor and assembled by means of a movable clamping roller with the turned end of the wood end protruding from the moving clamping tower. After the squeezing process is completed, the clamping cylinder and the two clamping towers are opened by moving a strand comprising several pressed pieces of wood and the last, only composite piece of wood, provided that there is no connection between the pieces of wood contained therein. phase still mechanically unstable, subjected to traction load. This device is characterized by a number of time-consuming transport operations, partly conditioned by the two-sided treatment of pieces of wood, as well as by the positioning of spatially separated milling stations and by a bow press. Each of the two milling stations is provided with a straightening and clamping means for the pieces of wood, which must be treated in such a way as to obtain a structure that is fully structural in scope and requires a large number of surfaces.

DE 20 2008 001 859 Ul is a known device adapted for the manufacture of profiles for wedge joints in which bundled workpieces are processed. The packets come via the first conveyor belt, which consists of sequentially positioning the first conveyor belt, the rotary table carrying the conveyor belt, and the second conveyor belt joining the rotary table after aligning its side facing the milling table on this milling table, which is movably perpendicular to the first • ·· conveyor beam. After the alignment and fixing, the package lying on the milling table is transported to the milling device, with the profile of the wedge joint facing the other side of the cutting. The package is then transferred from the milling table to the second consecutive arrangement of the third conveyor belt and conveyor belt of said rotary table, which is moved perpendicularly between the conveyor belts, to the fourth conveyor belt. By rotating the turntable about a vertical axis, the package attached to it, which is provided with a wedge-shaped profile on one side, can be rotated 180 ° again to the first conveyor beam, and then, after alignment with cooperation the second conveyor belt and the milling tables, the other side of which is fitted with a profile for the wedge joint before the package consisting of wood profiled on both sides is removed via the fourth conveyor belt. Both conveyor strands, in conjunction with the rotary movement of the rotary table and the milling tables, provide circular guidance that allows time optimization for machining both sides of the package. This device, too, is conditioned by the many lengthy transport operations, conditioned by the circular guidance of the packets and the rotation of the packets to be processed on the rotary table. Also, this device, in proportion to the absolute lengths of the wood to be machined, requires a substantial surface to be erected.

It is an object of the invention to design a suitable device according to simple, optimized movement paths and high flow. The task is solved by a device having characteristics according to the characteristic part of claim 1.

It is essential, therefore, that the milling device and the equally adhesive device form parts of a structural group that move vertically along a contracted curve, within an intermediate space, between the ends to be machined, facing each other, of the workpiece timber to be connected to the wedge joint, with clamping towers on either side of this intermediate space. In the work cycle corresponding to the course of said curve, both ends of the wood facing in front of each other are cut and glued, with the • milling process being preferably done from the top down. Transport operations between two locally separated milling devices are thus eliminated. It is further essential for the invention that the conveyor leading the pieces of wood one after the other into the processing area, i.e. the area of operation of the clamping tower on the inlet side, the transverse conveyor on the inlet side, on which the pieces of wood are subjected to movable action transversely to their longitudinal dimension. In conjunction with the alignment of pieces of wood of different lengths, preferably at their ends facing the clamping tower on the inlet side, timing losses are avoided, especially for shorter pieces of timber, so that transport times reach a position that allows milling device, minimize.

The features of claims 2 and 3 are directed to the design of the clamping towers. In addition to the function of fixing pieces of wood, the function of longitudinal displacement is joined, with the assigned actuators of the two clamping towers equipped with actuators that can be controlled independently of one another. This is an advantage when performing longitudinal displacement of not yet compressed and only composite wedge joints that cannot yet be loaded, to allow the possibility of displacement, provided that all connections during longitudinal displacement are only compressed.

The feed tower on the inlet side, which in the transport direction of the conveyor device, which is formed as a cross conveyor, for opening the piece of wood is formed by an opening according to claim 4 arranged in a longitudinal direction of the piece of wood movably on the frame of the device. So it can be used to exert pressure during the compression of the bonded and compound wedge joint.

The features of claims 5 and 6 are directed to the alignment measures of the pieces of wood on the feed side. In this way, it can be adjusted precisely at each of its two ends at each end with the help of special backrests that provide a point bearing, so as to offset the natural curvature of the wood as well, and the strand made up of such curved wood goes straight.

• · · • ·

The features of claims 7 and 8 are directed to measures for positioning two, into the intermediate space between the two clamping towers of the projecting ends of the two pieces of wood to be treated. The aim of this measure is to adjust the exact distance between the front ends of the pieces of wood and to align it in a certain position within said intermediate space, namely by adjusting it to the movement line of said structural unit and the associated milling device. In this way, the appropriate profile dimensions are obtained for a wedge joint of reproducible quality, which can be laterally displaced on both sides of the structural unit for division.

According to the characteristics of claim 9, a movable clamping tower is connected to the inlet side by a piston and cylinder unit by which the pressure necessary to compress two composite pieces of wood can be applied. Only minor movement is required to develop pressure. The output from the device is thus a strand of individual pieces of wood, which are interconnected at the front via mutually wedged joints.

According to the features of claims 10 and 11, there is provided a device for notching the undersides of pieces of wood that need to be machined on the front face associated with said construction group and in particular can be moved between the active position designated for notching, and inactive positions on a construction group in which notching is not performed. By inserting a notch or cut along the underside and in parallel and by moving away from the front of a piece of wood, the incorrect cutting off of the lower edge parts is prevented as a result of the top-down milling process. By means of a device which is movable between the two positions, an incision can be made with this option, so it can be used optionally.

The features of claim 12 are directed to the structural structure of the notch device. It has two rotating saw blades so that both ends of the pieces of wood protruding into the intermediate space are exposed to notching. The device is therefore equipped for simultaneous machining of both pieces of wood projecting into said intermediate space, and the two saw blades are arranged according to this function. The delivery movement between the preparation and the pieces of wood that are clamped at this stage can be carried out by means of a special drive of the preparation or this movement may be carried out by the structural unit as a whole. Depending on the purpose, the cutting depth of the saw blade into an individual piece of wood is adjustable.

The features of Claims 13 and 14 are directed to the spatial position of the notching, milling and adhesive devices, thereby determining the design time sequence of the machining steps, respectively, of each other following cutting, milling and gluing.

The invention will now be explained in more detail with reference to an embodiment which is presented in more detail in the drawings. They show:

FIG. 1 is a perspective view of a wedge coupler according to the invention;

FIG. 2 is an enlarged partial view of the wedge coupling device of FIG. 1;

FIG. 3 is a further enlarged partial view of the wedge coupling device according to SL 2;

FIG. 4 is a schematic representation of a timber alignment on a feed side in a known embodiment;

FIG. 5 is a schematic representation of the timber alignment of the invention;

FIG. 6 is a partial representation of the milling unit with the pre-cutter in the inactive position; FIG. 7 is a partial representation of the milling unit with the pre-cutter in the active position;

SL 8 Perspective Isolated View of a Wood Hair Support.

With reference to Figure 1, a cross conveyor is indicated, which is designed and arranged to fit the supporting pieces of 2 wood into the treatment area of the device intended to cut the 2 pieces of wood in the manner described below at the front equip the sides with complementary profiles for the wedge joint, assemble and compress them after applying the adhesive on the front so that 2 strands of boards or beams form compound strands from several such pieces.

The transverse conveyor 1 consists of the arrangement of mutually parallel chain drives 3, which are provided with spacers, spaced apart, and at the front ends of which in Fig. 1 a system of further ones is connected, at least after the effect of identical chain drives 4, by means of which the cuts The two woods are brought to a reclining position corresponding to the direction of arrow 5 and will be described below. The direction 5 therefore corresponds to the transport direction of the cross conveyor 1.

Pieces of 2 wood can have different lengths and are machined one after the other.

6 and 7 denote the clamping towers arranged along a line extending parallel to the pieces of 2 wood, each clamping tower being intended for hydraulic clamping and thus for fixing individual pieces of wood, and the clamping towers are connected to the control a device that is not displayed due to image clarity. They can be switched between an open position in which individual pieces of wood can be fed or removed and a closed position in which individual pieces of wood are fixed.

The clamping tower 7 is the clamping tower on the inlet side and for this reason formed in the direction of the arrow 5 open. A piece 2 of wood moving to the said backrest, namely its end region on the left side of Figure 1, is therefore inserted into the clamping tower 7.

The clamping tower 7 on the inlet side is moved in the direction of the arrow 8 so that it is actuated by the pressure medium, and in this direction is designed and adjusted horizontally to receive and fix individual pieces of 2 wood. It is intended to move the clamped piece of wood to the pressing position.

On the opposite side, the clamping tower 6 is stationary. 9 is a construction group (Figs. 6, 7) bearing a milling device 27 and an adhesive device 31, and which is motile in the vertical plane between the clamping towers 6, 7, e.g. horizontally and vertically movable by actuating with a pressure medium, • ·

8 Σ · · ·

.........

in particular, it is movable in the vertical direction within the intermediate space 10 along the contracted curve by cooperating with the control device, which is not shown for transparency reasons.

The piece of wood 2, which is to be fitted on the front with profiles for the wedge joint, moves in a horizontal plane, resting on its wider side, transversely to said backrest position and then in a manner to be described further, with the clamping tower 7 , which is in the open position, moves in the longitudinal direction, as necessary, to the reclining position on the front, and then the clamping tower 7 returns to its closed position. In the sequence of the incoming pieces of 2 wood, each prior piece of wood 2 is located in the area of operation of the clamping tower 6, which is initially in the open position, and is displaced by a longitudinal movement to a reclining position on the front facing the clamping tower 7, then the clamping tower 6 is closed.

The intermediate space 10 between the fixed ends of the two pieces of wood facing each other is dimensioned such that construction group 9 then moves from top to bottom through this intermediate space, with both fronts of the pieces of wood 2 facing one against the other, forming a profile for the wedge joint, and applying adhesive to them. When the construction group 9 moves horizontally from the intermediate space 10, the assembly and pressing process is started, for which the description is additionally referred to in Figures 2 to 8, in which the same functional elements are denoted by the same reference numbers.

Z 11 is in FIG. 2 is a piston and cylinder unit intended to be arranged and pressed for pressing two pieces of 2 wood which, at their ends opposite each other, are provided with wedge-shaped profiles and adhesive applied at the front thereof. with a clamping tower 7 that can be moved in the direction of the arrow 8. To perform compression, both clamping towers 6, 7 are in the closed position, by activating the piston and cylinder unit 11 via a clamping tower 7 against a fixed clamping tower 6. the pressure needed.

Wheels 12, 13 denote wheels on the discharge side each above and below the 2 pieces of wood that are connected to the drive 14. These wheels 12, 13 lie on each other facing sides of the pieces of 2 pieces of wood and serve for their longitudinal movement. In the same way, a drive 15 is provided on the inlet side, which is connected to a pair of wheels that rest on the upper and lower sides of the pieces of 2 wood, of which only the upper wheel is shown 16. Longitudinal movement on the inlet side provided by the drive 17 , when the clamping tower 7 is open and the clamping tower 6 is closed, it can also be used to bring the piece of wood on the feed side to the assembly position.

17 indicates a backrest holder 18 on the feed side which can be rotated to or from the movement of pieces of 2 wood. 19 indicates a panel intended to align the next piece of 2 wood on the drainage side. The structural structure of this for precise positioning of the ends of the two pieces of 2 wood on the front face, which are arranged one before the other, before milling the positioning device 40, is further referred to in FIG. 8 described in more detail.

FIG. 4 illustrates how the cuts of 2 woods that are brought into their working position on the feed side by means of a chain drive 4 are aligned in a known manner. For this purpose, there is provided a backrest 20 extending in parallel with arrow 8. The pieces of wood 2 that rest on it and are aligned thereafter are then moved in their longitudinal direction to the place 21 where the processing begins.

This causes the problem that the pieces of 2 wood to be machined often do not run perfectly straight but are sometimes slightly curved so that, in these cases, the alignment due to the leaning on the backrest 20 is made only at the front, i.e. at the end facing site 21, such successive cuts of 2 wood, after assembling the fabricated profiles for the wedge joint, form a beam 22 which may have a more or less curved course.

...... '·. ·.

According to the invention, for the elimination of this problem, as shown in FIG. 5, a projected rail 23 extending in parallel with the arrow 8 and a fixed backrest 24 and a movable backrest 25 which can be fixed in the selected position along the rail 23 along the rail 23. shall be positioned provided that only the ends of the piece 2 of the wood to be machined are rigorously supported to fulfill the abutment function. In this way, beam 26 is obtained which has the desired straight course, only when each of these pieces has 2 curved woods.

Structural group 9, which is arranged in the intermediate space 10, is shown enlarged in Figures 6 and 7. The figures do not detail that the intermediate space 10 is disposed in a vertical plane by means of a suitable propulsion system, inter alia for milling profiles for the wedge joint and the application of the adhesive to the profiles thus prepared are subject to a stepping action.

Construction group 9 has a milling device 27 from which a milling tool 28 extends from the housing on both sides, which can be rotated about the respective axis 29, 30. The parallel axes 29, 30 of the two milling tools 28 are vertically offset and extend perpendicularly to the arrow. 8. The profiles of the milling tools 28 on either side are arranged offset to divide so that in the assembled state of two consecutive profiles, a continuous course is externally exerted over the compound site.

The known adhesive device, which also forms part of the structural group, is indicated by 31

9.

32 indicates a pre-cutting device for cutting 2 pieces of wood to be machined, which is movably disposed on the underside of the milling cutter housing 27 parallel to the axes 29, 30 between the inactive position shown in Fig. 6 and the active position shown in Fig. 7. The device 32 consists of two saw blades 34, 35 which are mounted at the ends of the shaft 33, the axis 36 of the shaft 33 extending parallel to the direction 5 and. in the horizontal plane perpendicular to arrow 8.

The device 32, and in particular the saw blades 34, 35, are positioned and adapted, provided that they can be cut parallel to its front face in the underside of the 2 piece of wood, which is to be fitted with a wedge joint profile at the front. and with a small distance from it, before starting the milling process. In this way it is possible to avoid uneven breakage and also the fragmentation of the lower edge of a piece of 2 wood.

In order to carry out the delivery movement between the preparation 32 and the piece 2 of the wood in the horizontal direction along its lower edge, ie in the direction of the arrow 37, the device 32 in this direction may be arranged motor-movably relative to the construction group 9. Alternatively, this delivery movement may also be carried out by by appropriate movement of the structural group 9.

The positioning device 40, which is shown separately in Fig. 8, and which is located in the intermediate space 10 between the ends 38, 39 on the front of the pieces of wood 2 to be machined, consists of a support 18, which is rotatable about an axis 41, and whose base plate 42 on the end side forms a restriction on the movement of a piece of 2 wood on the feed side in its longitudinal direction. The backrest 18 can be rotated between the active position moving inwards along the path of the longitudinal movement of the piece of wood and represented in the figure and the inactive position away from this path of longitudinal movement. For a pivot motion, there is provided a piston and cylinder unit 43 which can be pneumatically or hydraulically actuated, the cylinder of which is pivotally connected to the retainer 17 and whose nozzle is pivotally connected at the intermediate lever 44 which is connected to the muffle part 45, on which the backrest 18.

The plate 19, which performs the alignment function, is connected to the bracket 48 via two parallel buses 46, 47 and, by means of a piston and cylinder unit 49, which can be pneumatically or hydraulically actuated, is twisted during the active position, i.e. "· • · ίο. : · · · · · · · · · · · · · Abutting against the face of end 38 on the discharge side of a piece of 2 wood in its longitudinal displacement path, and inactive positions substantially vertically engraved from that longitudinal displacement path.

The bracket 48 is attached to the sled 51, which are positioned in the direction of arrows by means of a servomotor 50 with the participation of a spindle 52, which engages with the sled 51.

8. The piece of wood 2 on the drainage side can be aligned in the longitudinal direction of movement by means of the plate 19, provided that the servomotor 50 is activated.

The operation of the wedge coupling device thus formed shall be carried out as follows:

The pieces of wood 2 to be machined come first with a transverse movement in the direction of the arrow 5 individually one after the other in an angled position on the inlet side, in which they rest on two spaced backrests 24, 25. (Fig. 5) Clamping tower 7 on the feed side is located in the open position so that after its closure a piece of 2 wood on the feed side is clamped. The support 18 of the positioning device 40 is in the active position such that, after moving the piece of wood 2 by means of the movement of the clamping tower 7, it rests on the support plate 42, that is, in a certain position with respect to the displacement length of the construction group 9 and thus the milling tool 28. Alternatively even with the clamping tower 7 open, the piece of wood on the feed side, by means of a longitudinal movement generated by the actuator 15, can be rested on the resting plate 42 of the backrest 18, and then the clamping tower 7 is moved to its closed position.

The piece 2 of the timber on the drainage side is supported by the actuator 14 and the wheels 13 with the open clamping tower 6 in the active position plate 19, whereby the desired desired position of the piece 2 can be adjusted by controlling the servomotor 50. timber on the drainage side. The clamping tower 6 is then moved to the closed position.

• ·

After both the backrest 18 and the panel 19 are in their inactive position, in the intermediate space 10 of the end 38, 39, the two pieces of wood 2 are facing each other in a certain position and at a certain distance.

Structural group 9 is positioned in the initial position laterally adjacent to the intermediate space 10 between the clamping columns 6, 7 and then moves horizontally to such a position that the milling tool 28 is positioned vertically above the retaining ends 38, 39.

If the machining of the ends 38, 39 is to be carried out without pre-cutting, the device 32 is brought to its inactive position. Then, structural group 9, and thus the milling tool 28, is moved vertically between the ends 38, 39 to produce profiles for the wedge joint, and immediately after the milling process, during the vertical milling movement, the adhesive 31 is applied to the profile for the wedge joint. from both sides. As soon as structural group 9 reaches its lower position, it moves laterally from the intermediate space 10 and then moves vertically back to its initial position in which it is available for further duty cycle.

With the clamping tower 6 closed, the closed clamping tower 7 now moves with the help of the piston and cylinder unit 11 to compress both spaced and assembled ends 38, 39, which then moves the assembled and pressed pieces 2 of the wood out, viz. of the beam thus formed by means of actuators 14, 15, provided that all the assembled positions are only pressurized during this longitudinal displacement.

According to the changed procedure, pre-cutting of the front faces can be performed before the milling process. To this end, the device 32 is restored to its active position shown in FIG. 7. According to the drive concept available to the device 32, once the structural group 9 has reached a suitable height position, the device 32 is guided by the edges facing one another with respect to the construction group.

• · · <

at each end 38, 39 or structural group 9 is run as a unit along said edges, making a cut parallel to the respective face in a piece of 2 wood. The subsequent workflow after making this cut is analogous to that described above without pre-cutting.

List of tags:

1st cross conveyor

2nd piece of wood

3. chain drive

4. chain drive

5th arrow

6. Clamping Tower

7. Clamping Tower

8. the arrow

9. construction group

10. the intermediate space

11. piston and cylinder unit

Round 12

Round 13

14. drive

15. drive

Round 16

17. holder

18. backrest

19. plate

20. backrest

21st

22. strand

23. rail

24. backrest

25. backrest

26. strand

27. milling preparation

28. milling tools

29. os

30. os

31. adhesive preparation

32. preparation

33. shaft

34. saw blade

35. saw blade

36. os

37th arrow

38th end

39th end

40. preparation positions

41. os

42. mounting plate

43. piston and cylinder unit

44. intermediate leverage

45. mufasti part

46. parallel bus

47. parallel bus

48. console

49. piston and cylinder unit

50. servomotor

51. sled

52. spindle

Claims (14)

Patent claims A device for producing a strand consisting of pieces (2) of timber in the form of boards or beams interconnected at the front by ties for a wedge joint, with a conveyor arranged on the inlet side intended for the successive feeding of individual pieces (2) wood in the work area, with a clamping tower (7) on the feed side that can be switched between the open position and the closed position, with a clamping tower (6) on the drainage side that can be switched between the open position and the closed position position, with an intermediate space (10) between the clamping towers (6, 7) and with a structural group (9) carrying at least one milling device (27) and one adhesive device (31), characterized in that making profiles for the wedge joint at the ends (38, 39) of two pieces (2) of wood facing the intermediate space (10) and for gluing the wedge joint profiles arranged in the intermediate space (10) moving vertically along the contracted k and that the conveyor is formed as a cross conveyor (1) to bring the pieces (2) of the wood to be treated one after the other directly into the area of operation of the clamping tower (7) on the inlet side. Apparatus according to claim 1, characterized in that each clamping tower (6, 7) is provided with a device for performing a longitudinal movement for a piece (2) of wood. Device according to claim 2, characterized in that each device for performing the longitudinal movement of the piece (2) of the wood is provided with a drive (14, 15) which can be independently controlled. Device according to any one of claims 1 to 3, characterized in that at least the clamping tower (7) on the feed side is disposed in a longitudinal direction in the longitudinal direction of the clamped piece (2) of the wood. ···· ···· A device according to any one of claims 1 to 4, characterized by a rail (23) on the inlet side, along which are placed backrests (24, 25) for aligning a piece (2) of wood, which is fed through work area. Apparatus according to claim 5, characterized in that at least one of the backrests (24, 25) is movable along the rail (23) and can be locked in the displaced position optionally. Device according to any one of claims 1 to 6, characterized in that in the intermediate space (10) there is positioned device (40) for the ends (38, 39) of two pieces (2) of projecting wood (2) projecting. therein, wherein the positioning device (40) consists of functional elements arranged pivotally between the position in which they block the longitudinal movement of the piece (2) of the wood in at least one direction and the released position. Device according to claim 7, characterized in that the positioning device (40), in addition to being designed and adapted to perform the reclining function, is also intended and adapted to perform the alignment function. Apparatus according to any one of claims 1 to 8, characterized in that the clamping tower (7) is connected to the piston and cylinder unit (11) by compressing the glued and assembled profiles for the wedge joint. Apparatus according to any one of claims 1 to 9, characterized in that the structural group (9) is provided with a device (32) for cutting at least one of the ends (38, 39) of a piece (2) of wood along its edge at the underside to be fitted with a wedge joint profile. Apparatus according to claim 10, characterized in that the device (32) is arranged movably along the construction group (9) between the active position intended for cutting the piece (2) of the wood and the inactive position in which the cutting is not performed. Apparatus according to claim 10 or 11, characterized in that the device (32) has at least one saw blade (34, 35) capable of rotating about an axis (36) perpendicular to the longitudinal dimension of the piece of wood (2), and which is designed and arranged for making a notch in a piece (2) of wood along its lower edge in the immediate vicinity of the end (38, 39). Apparatus according to any one of claims 10 to 12, characterized in that the device (32) is located below the milling device (27) forming part of the structural group (9). Apparatus according to claim 13, characterized in that the adhesive device (31) is located above the milling device (32).