DE7205342U - VENEER CUTTING MACHINE - Google Patents

Description

Patent attorneys

Dr. O. Loesenbeck

^ DipUrg. Sfrscke
Γ ^ ρΙ.-ing. Loessnbeck
Bielefeld, Herford Strake 17

Gottlieb Ziebeker, 4992 Espelkamp, Brandenburger Hing 19 isssaasaaa «

Veneer cross cutting machine

Veneer cross cutting machines have been in various for a long time Embodiments known. In the known machines of this type is in relation to the feed direction of the veneers or veneer packages to be cut, a workpiece support table is arranged in front of and behind the cutting unit. Before each cut, the veneers or veneer packages to be cut are so far on the The air table was pushed forward so that the lines were marked Cutting points lie exactly in the cutting plane of the cutting unit. Then the cutting unit drive is switched on manually -and each made a cut. As a result of this manual operation, the one that can be achieved with these machines Relatively low performance.

The innovation is therefore based on the task of these veneer cross-cutting machines to make it more powerful.

According to the innovation, this is essentially achieved in that the machine has an automatically operating feed device and equipped with a cutting unit drive that is automatically controlled depending on the workpiece feed is.

Further details of the innovation can be found in the following description and the drawings of some exemplary embodiments as well as from the subclaims.

( ^] It show:

{\ Fig. 1 the side view of a veneer cross-cutting machine designed according to the innovation,

Pig. 2 is a plan view of the machine according to fig. 1,

3? Ig. 3 shows a partial side view of an articulated chain with hollow rivets and one arranged in a hollow rivet Switching cams,

Pig. 4- a plan view of the arrangement according to FIG. 3,

Fig. 5 shows a cross section through a V-belt with a / adjustable cams clamped on it,

6 shows a further embodiment of the veneer cross-cutting machine in a graphical representation.

In the machine according to FIGS. 1 and 2, a horizontally extending, with a motor, hydraulic or pneumatic drive equipped feed conveyor 2 and behind the Cutting unit 1 also has a horizontal discharge conveyor 3 arranged, which is coupled synchronously with the Zuf örderbahn 2 or with its drive. At one above the feed conveyor 2 arranged, transverse to the feed direction adjustable stop bar 4, a length scale 5 is arranged so that it is still when the veneer package a is placed on the bar 4 is above this package and is therefore clearly visible.

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Furthermore, above the feed conveyor 2 is a roller 6 and 7 guided endless articulated chain 8 arranged, the lower strand immediately next to or above the length scale 5 lies. Timing pulley 6 facing the cutting unit 1 or whose axis is coupled to the conveyor belt drive with the interposition of two gears that the The upper run of the conveyor track 2 and the lower run of the chain 2 always in the same direction and at the same speed move. A commercially available articulated chain with hollow rivets is preferably used as the chain (see Figs. 3 and 4), the division of the chain is approximately or exactly one centimeter.

In some of the hollow rivets of the chain 8, cams are provided at intervals that correspond to the desired workpiece length 9 arranged by means of resilient pins 10. In the range of motion of this cam 9, a switch 11 is fixedly arranged, which stops when a cam 9 «hits of the conveyor belt drive and the chain 8 and, at the same time, the cutting mechanism drive is switched on. According to Fig. 3 and 4, the pins 10 are arranged eccentrically on the cams 9. This gives the possibility of precisely setting the cams 9 for any chain pitch that is desired in each case To set the length dimension.

There are two switches in the range of motion of the cutting unit 1 and 12a, one of which (12) limits the depth of cut and after the set cutting depth has been reached, the cutting unit drive switches to reverse, while the other (12a) switches on the workpiece feed drive again at the end of the upward movement of the cutting mechanism.

One in the range of motion one attached to the ICette 8 The second switch 13 located on the cam 9 causes the conveyor belt drive to be switched from forward to reverse.

The machine so constructed works as follows;

First, the veneer package to be cut is placed on the strip 4 in such a way that the point at which the first cut is made should take place at the front end, i.e. at the zero point of scale 5. Then the conveyor belts advance and thus the chain 8 is switched on. As soon as one of the cams 9 arranged in the chain 8 hits the switch 11, the aforementioned forward drive is switched off and the drive of the cutting unit 1 switched on, as a result makes a cut. As soon as the cutting unit has reached the desired cutting depth, the switch 12 is actuated and so that initially the return of the cutting unit drive is switched on and at the end of the upward movement through the switch 12a the workpiece feed drive is switched on again. at the subsequent upward movement of the cutting unit, the switch 12 is actuated, which switches off the cutting unit drive and causes the forward drive of the conveyor tracks to be switched on again.

When all of the pre-programmed cuts are carried out by the cams 9, one of the cams arranged in the chain 8 hits a switch 13 _T cLer switches the drive motor of the conveyor tracks 2 and 3 from forward to reverse until the conveyor tracks have reached their starting position again. The cut veneers can then be removed from the conveyor track 2.

Instead of that in the embodiment described above An endless V-belt 14 can also be provided, as shown in FIG. 5, on the switch actuating cam 9 by means of spring-loaded clamping devices 15 can be arranged longitudinally adjustable. That the switch cams supporting strand of the V-belt 14 is preferably in the vicinity of the fixed length scale shown in Fig. 1

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5 arranged and the clamping device 15 with one in the area this scale 5 provided pointer 16 lying.

FIG. 6 shows an embodiment in which the veneer packs a run over a plate 18 to the cutting mechanism are fed horizontally. This workpiece support plate is on the stationary machine table 19 by means of a laterally attached to the table guide rail 20 dovetail-shaped or a similar cross-section linearly longitudinally displaceable and on one side with a scale 5ehrersehen, in its area on the plate 18 cams ('To operate the switches 11 and 13, which are attached to the table 19 in their area, are arranged to be longitudinally displaceable.

The plate 18 is preferably driven by a V-belt or chain drive 21.

On the side of the table 19 facing away from the scale 5a, a second scale 'pb is arranged, which enables the exact placement of the veneer packs a to be cut on the plate 13, the front edge of which is in the same vertical plane when the veneers are applied with the zero point of the scale 5b .

This embodiment of the machine works precisely in principle just like the previously described embodiment according to FIGS. 1 to 4.

They have a new veneer cross-cutting machine compared to familiar ones Machines of this type have the advantage that the cutting of the veneer packs after they have been placed on the The zero point of the scale takes place fully automatically and the operator is already familiar with the next package to be cut can deal with expensive veneers such as walnut or rosewood veneers often takes a lot of time.

Claims (14)

Protection claims 1. Veneer cross-cutting machine, characterized in that it is equipped with an automatically working workpiece feed device and with a cutting mechanism drive that is automatically controlled as a function of the workpiece feed. y 2. Veneer cross cutting machine according to claim 1, characterized characterized in that the WerksJuckvorschubeinrichtung Has at least one switch actuating cam (9) or the like, in its range of motion at least a switch (12) is arranged in a stationary manner, which switches off the drive of the workpiece feed device as well as switching on the cutting unit drive. / 3. Veneer cross cutting machine according to claim 1 and 2, characterized in that in the range of motion of the Cutting unit (1) a switch ('12) is arranged, the When the desired cutting depth is reached, the cutting unit drive switches to reverse ./ 4. Veneer cross cutting machine according to claim 1 to 3, characterized in that a second switch (12a) is arranged in the movement area of the cutting mechanism 1 which causes the workpiece feed drive to be switched on again at the end of the upward movement of the cutting machine. 5. Veneer cross cutting machine according to claim 1 to 4-, characterized characterized in that a switch 13 is arranged in the range of motion of a cam 9, which enables switching of the Workpiece feed drive causes return or rapid return. 6. Veneer cross-cutting machine according to claim 1 and 2, characterized in that the Werkf.uuckvorsch.ubeinrichtung has at least one mechanically driven conveyor track (2) ,, 7 Veneer cross-cutting machine according to claims 1, 2 and 6, characterized in that an endless articulated chain (8) or an endless V-belt with the conveyor track (2) (14) is coupled synchronously, in or on which at least one switch actuating cam (9) od. the like. is arranged to be adjustable / 8. Veneer cross-cutting machine according to claim 1, 6 and 7 »characterized in that a length scale (5) is arranged in a stationary manner next to the conveyor track (2). / 9 veneer cross-cutting machine according to claim 1, 6 and 7> characterized in that the switch actuating cam or cams (9) are arranged in hollow rivets of the articulated chain (8) so that they can be repositioned by means of pins (10). 10. Veneer cross cutting machine according to claim 1, 6,7 and 9 » characterized in that the pins (10) are arranged eccentrically on the cams (9) .. 11. Veneer cross-cutting machine according to claim Ί, characterized in that the workpiece feed device is a movable on a machine table in its longitudinal direction as well as rectilinearly guided workpiece support plate (18). / 12. Veneer cross cutting machine according to claim 1 and 11, characterized in that on one side of the workpiece support plate (18) at least one switch actuating cam (9) is arranged to be adjustable in the longitudinal direction./ 13 · Veneer cross-cutting machine according to. Claim 1, 11 and 12, characterized in that the side of the sales piece support plate (18) a length ruler (5a) is attached in the adjustment range of the cams (9). 14. The cross-cutting machine for veneer according to claims 1 and 11 to 13, characterized in that on the side of the table (19) facing away from the length scale (5a) a second Length scale (5b) is fixedly attached. /