Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27H—BENDING WOOD OR SIMILAR MATERIAL; COOPERAGE; MAKING WHEELS FROM WOOD OR SIMILAR MATERIAL
  • B27H1/00—Bending wood stock, e.g. boards
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
  • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
  • B23Q1/03—Stationary work or tool supports

Definitions

• the invention relates to a device for rotating boards and similar elongated wood products with a plurality of guide bodies which are adjustably mounted in a frame and which together form a flat board guide channel which extends along the longitudinal axis of the frame and has a twist about the longitudinal axis of the frame which can be changed by adjusting the guide bodies .
• Boards and similar lamellar elongated wood products can be separated from the sides of a flattened timber or log using a non-cutting technique. These boards or similar wood products not only have a curvature but also a twist, i.e. they are rotated or coiled around their longitudinal axis. This deformation precludes automated further processing of the boards in numerous applications. The twist that occurs is stronger, the more inclined the cutting edges separating the board are from the longitudinal direction of the wood.
• the boards can be subjected to a rotating straightening process, so that they lose their twist caused by manufacture and are therefore suitable for further processing.
• roles are stored in several cascaded guide frames as board guide bodies.
• the guide frames are pivoted about a common axis, for example the longitudinal axis of the frame, in such a way that they together form a board guide channel, the twist of which is selected in each case so that it reverses the existing twist of the boards.
• the guide frames in the known device are each provided with a separate swivel drive which brings them into the swivel position required in each case.
• the control of these individual swivel drives is relatively complex.
• the design effort in this known device is relatively high.
• a plurality of parallel bending stops can be moved against the workpiece in order to press it against a group of fixed bending stops.
• the workpiece does not get a twist here, but a bend.
• the workpiece does not run into a guide channel, but is inserted between the two groups of bending stops before they are adjusted.
• the object of the invention is therefore to design a device of the type mentioned at the outset in such a way that it is very robust with a simple construction and enables the board guide channel to be adjusted in a simple manner.
• the guide bodies are guide plates which extend in the longitudinal direction of the frame and are arranged in two plate packs which form the board guide channel with their mutually facing plate edges, and in that the guide plates of each plate pack each have a common, near slat pivot axis extending transversely to the guide slats at the inlet of the board guide channel can each be pivoted separately by means of a pivot drive.
• the guide plates of each plate pack can be adjusted in a fan-like manner to one another in such a way that the board guide channel formed between the two plate packs changes its twist starting from the inlet that remains unchanged.
• the change in the twist is carried out in such a way that the boards passing through the board guide channel in their longitudinal direction are rotated about their longitudinal axis in opposition to the twist which they received during their manufacture, so that this original twist of the boards is lost, so that the boards are straight are directed.
• this device is very simple because, apart from the adjustment drive for the pivoting, only the guide plates are provided as moving parts.
• These guide slats can be designed as very stable parts that mutually guide and support each other due to their flat abutment in the disk pack, so that apart from the structurally very simple to carry out pivot bearing, no other guidance is required for the guide slats. This enables a compact construction of the direction-of-rotation device, so that it can be arranged just behind the processing point at which the boards are produced without cutting.
• All guide plates of each plate set are preferably connected to a common swivel drive in such a way that the individual guide plates can be pivoted differently in such a way that they can be spread out in a fan-like manner. This considerably simplifies the design effort for the swivel drive. Instead, a separate swivel drive can also be provided for each guide lamella.
• a very particularly simple and robust embodiment of the swivel drive is characterized in that the swivel drive has adjustment rods extending through bores transverse to the guide plates of the plate packs and which can be tilted about axes extending parallel to the longitudinal axis of the frame. In the event of a tilting movement of these adjusting rods, all of the guide plates of the associated plate pack are pivoted together, but by different pivoting angles. Further advantageous embodiments of the inventive concept are the subject of subclaims.
• 1 is a simplified side view of a device for rotating boards
• FIG. 2 is an end view of the device of FIG. 1 in the direction of arrow II,
• FIG. 3 shows an end view of the device according to FIG. 1 in the direction of arrow III
• FIG. 4 is a side view similar to FIG. 1, an upward and downward exploded view of the two plate packs, the fan-like spreading of which can be seen, and
• Fig. 5 is an end view similar to Fig. 3, but in the open state.
• the device shown in the drawing is used to straighten boards and similar elongated flat wood products that have been cut using a non-cutting technique from the sides of a flattened timber or log. These wood products, hereinafter referred to in a simplified manner as "boards 1", run from the one on the right in FIG Inlet side in the direction of arrow 2 and leave the device at the opposite outlet end (left in Fig. 1).
• the device has a frame 3 in which a lower plate pack 4 and an upper plate pack 5 are arranged one above the other.
• Each plate pack 4, 5 consists of flat, upright guide slats 6, the "upright” arrangement relating to the position of the board 1 at the inlet.
• the guide slats 6 extend in the longitudinal direction of the frame and form between their mutually facing slat edges 7 a board guide channel 8 which extends in the longitudinal direction of the frame and has a swirl around the longitudinal axis 9 of the frame.
• This swirl of the board guide channel 8 is opposite to the natural swirl of the boards that occurred when the boards were separated about their longitudinal axis. As a result, the boards are subjected to a direction-of-rotation process as they pass through the board guide channel, which straightens them.
• the mutually facing, the board guide channel 8 delimiting lamella edges 7 are - seen in normal planes to the frame axis 9 - rounded so that no sharp edges protrude into the board guide channel 8 and could damage the boards 1.
• the slat edges 7 already run more or less inclined to a horizontal plane in the initial state shown, so that the board guide channel 8 already has a predetermined swirl in the initial state shown.
• each plate pack 4, 5 are in the region of their longitudinal edges 7 in spread out in a fan-like manner in such a way that the board guide channel 8 thereby receives its twist, "twist” being used to denote a course of the board guide channel 8 that is at least approximately coiled about the longitudinal axis 9 of the frame.
• the fan-like spreading of the guide slats 6 can be seen particularly clearly in FIG. 4. There the two plate packs 4, 5 are shown pulled apart upwards and downwards, so that the fan-like spread can be seen.
• the guide plates 6 of each plate pack 4 and 5 are each separately pivotable about a common, near the inlet of the board guide channel 8 transverse to the guide plates 6 La elle pivot axis 10 and 11 respectively. In this way, an adjustability of the twist of the board guide channel 8 is achieved.
• the swirl is chosen so large that the swirl present after the manufacture of the boards 1 is completely eliminated, so that straight boards are obtained. This initially existing swirl of the boards 1 depends on the production conditions and the properties of the wood, in particular on the moisture and the temperature.
• the adjustment of the guide plates 6 is carried out by a swivel drive, with a separate swivel drive being provided for each of the two plate packs 4, 5, which is designed in such a way that it enables the individual guide plates to be pivoted differently.
• this swivel drive has an adjusting rod 12, 13 for each plate pack 4, 5, which extends through bores 14 and 14a, respectively, transversely to the guide plates 6 of the plate packs 4, 5 extends.
• Angular gears 16, 16 'arranged on both sides of the frame 3 are driven by a common controllable adjusting motor 15 (FIG. 3), of which a threaded spindle 17, 17' extends upwards.
• the threaded spindles 17, 17 ' are driven in opposite directions in such a way that one joint 18' is moved upwards and the other joint 18 is moved downwards.
• the adjusting rod 12 executes a tilting movement about a tilting axis 19 extending parallel to the longitudinal axis 9 of the frame.
• the two adjusting rods 12, 13 are arranged near the outlet end of the board guide channel 8.
• each joint 18, 18' is articulated with an overlying joint 21, 21 'to the two ends of the upper adjusting rod 13.
• the upper adjustment rod 13 is also tilted about a tilt axis 22 extending parallel to the longitudinal axis 9 of the frame, wherein it remains parallel to the lower adjustment rod 12.
• This adjustment movement changes - as indicated in FIG. 3 - the inclined position of the board guide channel 8 at the outlet end.
• the tilting drive formed in the exemplary embodiment described by the synchronously oppositely drivable threaded spindles 17 and the push rods 20, 20 'could also be implemented in a different way, for example by Synchronously controlled individual drives, which act on the adjusting rods 12, 13 or on the individual guide plates 6.
• the upper plate pack 5 is mounted in a support frame 23 which can be raised by an opening drive, in the exemplary embodiment shown by a lifting cylinder 24, in order to open the board guide channel 8. This open state is shown in FIG. 5.
• the opening of the board guide channel 8 is desirable in order to be able to remove wood residues which can result from a breakage of the boards 1 in the board guide channel 8.
• the push rods 20, 20 ' are designed such that they each have a rod lock 25, 25' which can be opened in order to extend the push rods 20, 20 'telescopically, when the upper plate pack 5 is raised in the manner described.
• the board guide channel 8 already has a swirl in the basic position, ie the board guide channel 8 horizontal at the inlet (FIG. 2) runs obliquely at the outlet (FIG. 3). Instead, it can also be provided that the board guide channel 8 runs without swirl in the starting position and is adjusted accordingly by adjusting the guide slats 6.
• the adjustment range of the guide slats 6 can also be chosen to be substantially larger than indicated in FIG. 3. For a particularly large adjustment range, it is advisable to provide a separate swivel drive for each guide plate.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Forests & Forestry (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6404757

Family Applications (1)

Country Status (6)

Families Citing this family (2)

Citations (4)

Family Cites Families (1)

• 1990
  • 1990-04-20 DE DE4012645A patent/DE4012645C1/de not_active Expired - Lifetime
  • 1990-12-19 US US07/920,500 patent/US5291927A/en not_active Expired - Fee Related
  • 1990-12-19 DE DE59005562T patent/DE59005562D1/de not_active Expired - Fee Related
  • 1990-12-19 CA CA002076858A patent/CA2076858A1/en not_active Abandoned
  • 1990-12-19 JP JP3502064A patent/JPH05502195A/ja active Pending
  • 1990-12-19 WO PCT/EP1990/002266 patent/WO1991016183A1/de not_active Ceased
• 1991
  • 1991-11-11 EP EP91901737A patent/EP0524929B1/de not_active Expired - Lifetime

Patent Citations (4)

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