FI116206B - Method and apparatus for patching veneer sheets - Google Patents

Description

116206

METHOD AND EQUIPMENT FOR PLATTERING PLATES

This invention relates to a method and apparatus for repairing veneer sheets.

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Nowadays, veneer sheeting is used in equipment where the veneer sheets are introduced into a patching machine in pink. For example, the machine may have a double-sided jaw structure, each jaw having a blade between which a violin plate to be patched is inserted. Removal of the defective site is accomplished with an upper blade and the formation and insertion of a patch 10 is performed from below with the lower blade acting as a counter blade. Known devices are very large and heavy, especially since high mass is required to ensure the accuracy of known devices. Devices cannot be moved, but people must move veneer sheets relative to the device. Automation of such devices is difficult.

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In addition, patching apparatus is known from Fl 97528 whereby the separation of the patch from the patch plate and the insertion of the patch into the veneer sheet is performed using the same linearly movable overhead stapler which removes the defective spot from the veneer sheet. The patching head used in such an apparatus can be moved by the operating apparatus above the veneer conveyor ··, without the need for a person to move the veneer sheets. However, such devices have the disadvantage of moving a relatively heavy patch head. . ·. the complex structure and unreliability of the cumbersome drive.

. The object of the present invention is to eliminate the drawbacks of the prior art and to provide a completely new method and apparatus for applying it to replace veneer sheets. The solution according to the invention is based on the fact that instead of moving the patch head, the control robots are used to move the veneer sheets relative to the patch head so that the patch head does not have to be moved by law, however, the patch boards can be automated.

The veneer sheets are relatively lightweight so that the robots needed to move them can be made relatively simple and lightweight. In addition, any of the currently available market-based positioning machines with a fixed patching head can be used as a patching machine, making the patching equipment relatively inexpensive and simple.

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The salary solution according to the invention can significantly speed up the veneer sheeting compared to the prior art. In addition, the accuracy of patching is improved because veneer sheets can be transported in a controlled manner for patching with respect to the patching head. In order to improve patching, several patching units can easily be arranged on the patch line, whereby, for example, several plates can be patched simultaneously.

Characteristic features of the method and apparatus of the invention are set forth in detail in the appended claims, wherein claim 10 1 relates to a method of patching veneer sheets with a patching machine, wherein the veneer sheets are photographed by camera and analyzed to detect defective locations fixed, i.e.. for positioning only a position vertically movable relative to the patch head under the patch head, characterized in that the plates are transported relative to the fixed patch head by means of a robot or similar guided conveyor and its gripping means.

In the following, the invention will be explained in more detail by way of example with reference to the accompanying drawing, in which: Fig. 1 is a side view of a patching line according to the invention, and • t ·. Fig. 2 is a top view of a patching line according to the invention, 25; Figures 1, 2 show a double-layered veneer line according to the invention. Here, the veneer sheets are brought by conveyors 1, 3 to a lifting platform 2, from which the veneer sheets are lifted one by one by means of an overhead suction feeder 4 and the suction conveyor conveys the veneer sheets over the straightening device 5. The presses press the veneer sheets to • • · · ···: 30 the roller which straightens the veneer sheets.

• · After this, the veneer sheets come to the camera conveyor 6, which is equipped with a bottom. ···. side suction, where the veneer sheets are captured by the camera above 7. Line oh- *. the sensing unit analyzes the inputs from the camera and determines the defective] '35 locations of the disks and their location.

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The veneer sheets are then conveyed to a 2-position divider conveyor 8, which divides the sheets by means of a pivotable hinge member to the upper patch apparatus or the lower patch apparatus as directed.

5 Each patching apparatus comprises belt conveyors 9, 15 for longitudinally transporting the plates, and chassis 11 and two fixed patching machines 12 having fixed (only moving in position) heads and two robots 10 mounted on the chassis with a guide unit and a transporting device with gripping edges. the plates can be moved in xy-10 directions (longitudinal and transverse directions of the line) on the substrate as desired based on camera measurements obtained with respect to the patch heads. Thereafter, the apparatus comprises conveyors 16 and a vacuum picking apparatus 17, a lifting platform 18 and conveyors 19, 20, which can be used to stack discs sorted by camera measurement into desired stacks and to transport them for further processing.

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The conveyor 9 may be a belt conveyor with lowering straps whereby when the veneers come into position on the substrate, for example by means of photocells, the straps are lowered into the existing grooves and the edge of the board is gripped by the first robot. is patched with the one-shot patching head shown above, for example. All holes in the other half of the disc are patched with this machine.

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• I · '*; · * The plate was then transferred to a second patching machine in the second robot, and salt '*' 25 performed the second side of the packaging as described above in relation to the first half. Correspondingly, the conveyor 14 may be a belt conveyor with ascending belts, whereby the belts are raised from the base in a similar manner to convey the plates from the patch forward, after which it can be and stacked as desired.

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• · · • «f • ·» Ψ. · * ·. It will be apparent to one skilled in the art that the invention is not limited to the examples illustrated above, but is within the scope of the appended claims.

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Claims (3)

A method of repairing veneer sheets with a repairing machine (12), in which method the veneer sheets are photographed with a camera (7) and analyzed to detect the defective portions, after which the disks are transported to the repairing machine where the defective portions are automatically repaired, in which method the disks are transported mechanically relative to the solid, ie. only vertically movable, the repair head for positioning the defective portion below the repair head, characterized in that the disks are transported relative to the fixed repair head by means of a robot or a corresponding controlled transport device with associated gripping means. Apparatus for repairing veneer discs with a repair machine (12), comprising a control system and a camera unit (7) with which veneer discs are photographed and analyzed for detection of the defective portions, after which the discs are transported to the repairing machine where the defective portions are automatically The apparatus comprises an automatic transport unit with which the disks 20 are transported mechanically relative to one or more solids, ie. only vertically movable, laying heads for positioning the defective portion below the laying head, characterized in that the device comprises at least one support (11) arranged adjacent to the laying machine 25 for transporting the disks with a longitudinal conveyor, in connection with which supporting there is provided a displacement device which is controlled by the control system, which displacement device is provided with one or more control robots or; corresponding automatic movers, which are provided with gripping means such as. 30 and the elongate displacement means at the edges of which the gripping means are arranged. • · • Device according to claim 2, characterized in that the longitudinal ·: ··· conveyor is a belt conveyor whose belt can be lowered / raised in rafters or. * *. In the support for controlling the conveyor.