JPH1158314A - Method and apparatus for vertical scarfing of wood veneer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain stably a high quality vertical scarfed veneer by a method wherein conveyance of a following scarfed veneer to a preceeding scarfed veneer is executed at right angles from a side at a lower level than a conveyance level of the preceeding veneer, and a downward scarfed slant of the preceeding veneer and an upward scarfed slant of the following veneer are combined and integrally joined by compression. SOLUTION: A wood veneer 1 being at a specific position wherein rear ends are made uniform with a matching apparatus 7, is transferred to a specific position of a rear end standard of a scarfing cutter 8. After end of cutting with the scarfing cutter 8, the wood veneer 1 is transferred to a specific position of a rear position being the rear end standard which is downward than a conveyance level of a joined veneer pinched transfer device 12. Then, a veneer pinching member 11c is raised, the scarfed veneer which is pinched as it is, is raised to a transfer level of the joined veneer pinched transfer device 12, and a tip of a following scarfed veneer is made to abut accurately against a rear end of a preceeding scarfed veneer. An abutting position is compressed vertically with a compression fastening device 10, and after obtaining a state wherein positional shift can not be generated, pinching of the wood veneer is released. Accurate joining can be executed without generating an error in joining.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parallel plywood obtained by laminating and bonding a large number of fibers with the fiber direction oriented in the length direction of the product.
Alternatively, a long veneer veneer having a thickness of about 1 to 4 mm and a length of about 1.5 to 6 meters required for producing a long veneer laminate commonly referred to as LVL or LVB, In order to obtain from normal veneer veneer of about 1 meter or rectangular veneer of about 1 meter x 2 meters, a number of rectangular or veneer veneers are stripped lengthwise in the fiber direction and long for veneer laminates. The present invention relates to a veneer veneer for forming a veneer veneer.

[0002]

2. Description of the Related Art As a conventional vertical veneer for veneer veneers of this type, for example, a scarf joint device in a manufacturing process of a veneer veneer is disclosed in JP-A-3-288603.

[0003]

In the above prior art, the veneer veneer is conveyed in the fiber direction, the leading end and the rear end of the veneer are cut by a pair of cutter blocks, and this is conveyed by a sliding conveyor. The adhesive is applied with a gluing device that also serves as a glue, and is superposed. Furthermore, it is sandwiched and conveyed by a sandwiching conveyor, and is joined by hot-pressing in the scaffle hot-pressing section. The remaining whisker-like fiber was damaged and caused a slight joining error, and there was a possibility that a slight conveyance deviation might occur between the sandwiched conveyance from the overlapped portion to the hot-pressed portion. There were problems such as the inability to stably obtain a high quality veneer veneer.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to achieve the above object, and a first aspect of the present invention is to cut both ends of a veneer veneer in the fiber direction on one side upward and the other on a downward scarf slope. Then, after applying the adhesive to the upward scarf slope, it is transferred to the lower part of the downward scarf slope of the preceding scarf veneer waiting at the compression joining position, and the downward scarf slope of the preceding scarf veneer. In the vertical veneer veneer stripping method in which the upward scarf slopes of the subsequent scarf veneer are integrally pressed and joined, the transport of the subsequent scarf veneer to the preceding scarf veneer is lower than the transport level of the preceding scarf veneer. At the level, and at right angles from the side, and further raise the succeeding scarf veneer and raise the downward scarf slope of the preceding scarf veneer and above the succeeding scarf veneer. After combined Kino scarf slope,
It is characterized in that it is integrally press-joined.

According to a second aspect of the present invention, there is provided a scarf cutting device in which one side of a veneer veneer in the fiber direction is cut upward on one side and the other side is cut on a downward scarf slope to form a scarf veneer. Scars located on the side
An adhesive application device for applying an adhesive to an upward scarf inclined surface of a veneer veneer, and an adhesive applied to a downward scarf inclined surface of a preceding scarf veneer which is located on a carry-out side of the adhesive application device and is waiting. A veneer veneer veneer consisting of a pressing device that presses an upwardly inclined surface to form a continuous band-shaped scarf-joined veneer, the scarf cutting appearance does not shift between the pressing device and the scarf cutting device. As described above, the adhesive is applied to the downward scarf slope of the preceding scarf veneer which is conveyed in the direction perpendicular to the fiber direction of the veneer while sandwiching the succeeding scarf veneer from above and below, and is waiting at the press-bonding position. A single-plate clamping / conveying device which rises so as to be able to contact the upwardly directed scarf slope, and further releases the clamp and returns to the original position after the clamping and clamping operation of the two scarf slopes by the clamping device; and A bonded veneer clamping / transporting device that clamps the front and back of the joined scarf joint from above and below and conveys the veneer in the fiber direction of the veneer is orthogonal to the pressing device, and is a scarf of the veneer clamping / transporting device. The veneer transport level is set lower than the scarf veneer transport level of the bonded veneer clamping and transporting device.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the device of the present invention, FIG. 2 is a side view from the supply device to the crushing device of the device of the present invention, FIG. 3 is a plan view of the entire device of the present invention, and FIGS. (4) and FIGS. 5 (5) to (8) are diagrams for explaining the operation of the present invention. 2 and 3, reference numeral 1 denotes a veneer veneer, which is a rectangular veneer having a thickness of 1 to 4 mm, a width and a length of 1 meter, or a rectangular veneer of about 1 m × 2 m. Numeral 2 is a supply device which supplies the veneer veneers 1 on the elevating table 4 one by one from the uppermost surface of the pile in the direction perpendicular to the fiber direction one by one by means of a suction conveyor 3 or a stab conveyor. Reference numeral 7 denotes a matching device, which is the front and rear ends 1F and 1B or the left and right ends 1R and 1 of the supplied veneer veneer 1.
L is adjusted to a predetermined position, and a reciprocating differential device 7A comprising a conveyor 6 capable of moving forward and backward and ruler plates 7R, 7L capable of moving the veneer veneer 1 to the center from the left and right each time, an air cylinder, etc. 7B and the veneer detector 5 disposed at an appropriate position on the conveyor 6. For example, as shown in the drawing, the veneer veneer 1 is supported by the conveyor 6 from below and is conveyed. The veneer is stopped by temporarily stopping at a position where its rear end passes immediately below the veneer detector 5 disposed at the position and passes a predetermined distance, for example, 50 to 150 mm, and the reciprocating devices 7A and 7B operate the ruler plates 7R and 7L. After aligning both ends of the veneer 1 in the fiber direction to the center side, the conveyor 6 is started in reverse to the carry-in side and stopped at the position where the veneer veneer 1 has detected the rear end 1R by the veneer detector 5. single It is intended to end the integrity of one of the rear and left-right directions. Numeral 8 denotes a scarf cutting device, which is located on the unloading side of the aligning device 7 and cuts both ends in the fiber direction of the veneer veneer 1 upward and the other side downward to obtain a scarf veneer 1S having a predetermined size. , Veneer veneer 1
And a circular saw for cutting the veneer veneer 1 comprising a pressing bar 8B for fixing both ends in the fiber direction at the time of cutting and a reciprocating device 8A such as an air cylinder for raising and lowering the pressing bar 8B. 8C and a circular saw moving member 8M comprising a rail such as an LM guide (trade name) and a servomotor are arranged in a pair on the left and right so that the circular saw 8C and the circular saw 8C can reciprocate in the transport direction and the reverse direction of the transport direction each time. I have. The amount of scarf of the veneer veneer 1 is adjusted by adjusting the angle of the circular saw 8C. Generally, the thickness is 2 to 6 times the plate thickness, and is appropriately set according to the quality of a product to be produced. Reference numeral 9 denotes an adhesive application device, which is located on the unloading side of the scarf cutting device 8 and is disposed appropriately above a side through which the upward scarf slope of the scarf cutting device 8 passes. A detector such as a photoelectric switch is disposed on the loading side of 9 and selectively applied by a detection signal of the detector, or selectively by using a movement signal of a single-plate sandwiching / transporting device described later. It is to be applied. The adhesive to be used is selected as needed, and for example, a thermoplastic adhesive such as hot melt or a thermosetting adhesive such as urea resin, melamine resin, urea resin, and resorcinol resin is used.
In this case, it goes without saying that an applicator to which a heating device, a cooling device, and the like are added according to the properties of the respective adhesives is selected. Reference numeral 10 denotes a pressing device, which is located on the carry-out side of the adhesive application device 9 and includes a pressing bar 10B containing a cooling or heating device, a reciprocating device 10A such as an air cylinder for raising and lowering the pressing bar 10B, It comprises an auxiliary bar 10C for positioning the height of the rear end of the single-scaffle plate and a reciprocating device 10D such as an air cylinder. The position of the rear end of the preceding scarf veneer is set by the auxiliary bar 10C to a transport level of a later-described bonded veneer clamping / transferring device which is somewhat higher than a transporting level of a veneer clamping / transporting device which will be described later. Further, the pressing device 10 applies a predetermined time, for example, heat such as hot melt, to the joining surface where the downwardly facing scarf slope and the upwardly sloped surface to which the adhesive has been applied are in contact with the standby scarf veneer 1S in standby. In the case of a plastic adhesive, bonding is performed by cooling and pressing for 0.5 to 1 second. The pressing force of the pressing device 10 is arbitrarily selected depending on the properties of the adhesive, the material of the veneer, and the like, from a pressure for flattening the unevenness of the veneer veneer 1 to several kg / cm ² . In the case of a thermosetting adhesive, a total of several seconds to several tens of seconds is required for the pressing time. Therefore, if time is required in the process, a single pressing device may be used. Needless to say, a plurality of tightening devices may be prepared and divided and tightened. Reference numeral 11 denotes a single-plate clamping and transferring device,
When the aligning operation of the side ends 1R, 1L and the rear end 1B in the fiber direction is completed, and when the cutting operation by the scarf cutting device 8 performed in parallel is completed, and the pressing operation by the pressing device 10 is completed. At this time, the reciprocating devices 11B and 11D such as air cylinders arranged vertically are operated to sandwich the veneer veneer 1 and the scarf veneer 1S from above and below by the veneer holding members 11A and 11C. Since the single-plate holding members 11A and 11C are integrally connected by a connecting member 11E, the rear ends thereof are aligned by the aligning device 7 by the reciprocating transfer device 11F such as the LM guide and the servo motor and the like, and the predetermined ends are aligned. The veneer veneer 1 at the position is transferred to a predetermined position based on the rear end of the scarf cutting device 8, and the veneer veneer 1 is moved to the rear end 1 by the veneer holding member 8 </ b> P of the scarf cutting device 8 in the clamped state.
It is clamped from above and below so that the position 1B and both ends 1R and 1L in the fiber direction do not shift. The scarf veneer 1S whose cutting end 1B has been cut by the scarf cutting device 8 is at a predetermined position based on the rear end is located at a rear end 1B position lower than the transport level of the bonding veneer clamping and transferring device 12. It is transferred to a predetermined reference position (see FIGS. 4A and 4B). Next, the single-plate holding member 11C is raised by the reciprocating differential 11D to raise the transfer level of the bonded single-plate holding and transferring device 12 held by the auxiliary bar 10C while holding the scarf single plate 1S, thereby leading the preceding scarf single plate. The front end of the subsequent scarf veneer is accurately brought into contact with the rear end of the head (see FIG. 4 (3)).
Next, the contact position is pressed from above and below by a pressing bar 10B of the pressing device 10 (see FIG. 4 (4)). When the position of the scarf veneer 1S cannot be shifted in this way, the reciprocating device 11D is moved upward and downward to release the holding of the veneer veneer 1S (see FIG. 5 (5)). . Next, the veneer holding member 11C returns to the original position of the scarf cutting device 8 which is the original position, and prepares for the next holding transfer (FIG. 5).
(6)). Numeral 12 designates a clamping bar 12P having a structure for clamping from above and below by a single-plate clamping and transferring device, and a reciprocating transferring device 12M such as an LM guide and a servomotor (not shown). The front and rear sides of the joint portion pressed by 10B are clamped from above and below, so that even if the adhesive force is incomplete, a force in the peeling direction is not applied to the joint portion by a length L of the scarf veneer 1S, which will be described later. It is to be nipped and transported to the cutting device 13 side (FIG. 5 (7)-
(8)). By adjusting the transfer amount of the reciprocating transfer device 12M, for example, the length L of the scarf veneer 1S
If it is set to be shorter by 1mm, the transfer amount is 1S
Is transferred 1 mm shorter than the length L, so that the rear end overlaps the front end of the subsequent scarf veneer by 1 mm, or 2 mm shorter than the length L of the scarf veneer 1S. And an arbitrary superimposed appearance is obtained.
Reference numeral 13 denotes a standard-size cutting device, which comprises a well-known intermittent driving device, a knife standard-size cutting control circuit, and the like. Although not shown, a signal proportional to the transfer amount of the bonded single-plate sandwiching transfer device 12, for example, a driving servomotor Continuous band-shaped scarf-joined veneer 1 with a knife operated by a standard-size cutting signal from a standard-size cutting control circuit consisting of a combination of a driving signal and a counter.
C is cut to obtain a fixed length single plate 1T. Reference numeral 14 denotes a stacking device, which receives the continuous band-shaped scarf veneer 1C passing through the standard-size cutting device 13 from below by a gate bar 14G and continuously transports it. The roller 15 is fed out somewhat faster, the front end thereof is brought into contact with the stopper 14B, and the stopper 14B is brought into alignment. Then, the reciprocating device 14S is operated to open the lower surface and fall and deposit on the elevating table. It should be noted that whether to control each device individually or to control the entire device in conjunction with each other is arbitrarily set.

[0007]

According to the first aspect of the present invention, when vertically cutting a veneer veneer, the transport of the succeeding scarf veneer to the preceding scarf veneer is performed at a level lower than the transport level of the preceding scarf veneer, and Performing at right angles from the side, further raising the succeeding scarf veneer, aligning the downward scarf slope of the preceding scarf veneer with the upward scarf slope of the succeeding scarf veneer, and then pressing and joining them together Since it is made to do, the conventional preceding and succeeding scarf veneers are transported in series, at the same level and in the same direction, in comparison with the vertical stripping method of joining the scarf slope at the joining site, It is possible to perform accurate joining without causing joining errors due to damage by beard-like fibers remaining at the tip of the veneer at the time of scarf cutting.

Further, according to the second aspect of the present invention, the subsequent scarf veneer is sandwiched from above and below in the fiber direction of the veneer so that the scarf cutting appearance does not shift between the pressing device and the scarf cutting device. It is transported in the orthogonal direction, and the upward scarf slope coated with the adhesive is lifted up so as to be able to contact the downward scarf slope of the preceding scarf veneer which is waiting at the crimping joint position, and further by the crimping device. After the clamping connection operation of the two scarf slopes is completed, the clamping unit is released to return to the original position after clamping, and the single-sheet fiber is clamped from above and below the front and back of the scarf joint joined by the clamping unit. The bonded single-plate clamping and transferring device, which conveys in the direction, is orthogonal to the pressing device, and the scarf single-plate conveying level of the single-plate clamping and transferring device is the scarf single-plate transferring of the bonded single-plate clamping and transferring device. Les Since the lower scar is disposed lower than the lower scar, the succeeding scarf veneer is brought into contact with the downward scarf slope of the preceding scarf veneer at the position where the scarf veneer is conveyed and pressed and joined, and the crimping joint and pressure of the two scarf slopes are performed. The bonded veneer can be transported accurately and reliably after tightening, and as a result, the beard-like fibers remaining at the tip of the veneer during scarf cutting, which was a problem of the conventional device, are damaged. In addition, a delicate joining error occurs, and a delicate conveyance deviation occurs during the holding and conveying from the overlapping portion to the hot-pressing portion, so that the angle of the joining surface does not become linear and the occurrence of defective joining can be prevented. The overlapping amount of the joining surface can also be set to an arbitrary overlapping amount corresponding to the product, and there is an effect that a high-quality veneer veneer can be stably obtained for a long period of time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the device of the present invention.

FIG. 2 is a side view of a device of the present invention from a supply device to a pressing device.

FIG. 3 is a plan view of the entire device of the present invention.

FIG. 4 is a diagram illustrating the operation of the device of the present invention.

FIG. 5 is a diagram illustrating the operation of the device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Veneer veneer 1C Scarf joining veneer 1F Front end of veneer veneer 1B Rear end of veneer veneer 1R Right end of veneer veneer 1L Left end of veneer veneer 1S Scarf veneer 1T Standard size veneer 2 Supply device 3 Adsorption conveyance conveyor Reference Signs List 4 Lifting table 5 Single plate detector 6 Conveyor 7 Alignment device 7R Ruler plate 7L Ruler plate 7A Reciprocating device 7B Reciprocating device 8 Scarf cutting device 8A Reciprocating device 8B Press bar 8P Single plate clamping member 8C Circular saw 8M Circular saw moving Member 9 Adhesive coating device 10 Compression device 10A Reciprocating device 10B Compression bar 10C Auxiliary bar 10D Reciprocating device 11 Single plate clamping and transferring device 11A Single plate clamping member 11B Reciprocating device 11C Single plate clamping member 11D Reciprocating device 11E Connecting member 11F Reciprocating transfer device 12 Joined single plate clamping transfer device 12M Reciprocating transfer device 12 Clamping bars 13 fixed-length cutting device 14 deposition apparatus 14B stopper 14G gate bar 14S reciprocating device 15 pinch roll

Continued on the front page (72) Inventor Masaki Isogai 5-1-1, Nittacho, Takahama-shi, Aichi Hashimoto Electric Industry Co., Ltd. (72) Inventor Toshimichi Nishiyama 5-1-1, Nittacho, Takahama-shi, Aichi Hashimoto Electric Industrial Co., Ltd. In company

Claims (2)

[Claims] 1. Cutting both ends of a veneer veneer in the fiber direction one upward and the other on a downward scarf slope, applying an adhesive to the upward scarf slope, and placing this in a press-clamping position. The veneer veneer, which is conveyed to the lower part of the downward scarf slope of the preceding scarf veneer in standby, and press-bonds the downward scarf slope of the preceding scarf veneer and the upward scarf slope of the succeeding scarf veneer together. In the stripping method, the transport of the subsequent scarf veneer to the preceding scarf veneer is performed at a level lower than the transport level of the preceding scarf veneer, and at right angles from the side, and further raising the subsequent scarf veneer, After aligning the downward scarf slope of the preceding scarf veneer and the upward scarf slope of the succeeding scarf veneer, they are integrally crimped and joined. Vertical veneer veneer 2. A scarf cutting device for cutting one side of a veneer veneer in the fiber direction into an upwardly directed scarf and the other side downwardly into a scarf slope to form a scarf veneer, and a scarf cutting device located on the carry-out side of the scarf cutting device. An adhesive application device for applying an adhesive to an upwardly inclined scarf inclined surface of the cut scarf veneer;
A pressing device that presses an upwardly sloped surface coated with an adhesive on a downwardly facing scarf slope of the preceding scarf veneer that is located on the carry-out side of the adhesive application device and is on standby to form a continuous band-shaped scarf bonded veneer. The veneer veneer vertical peeling device comprising: a vertical scarf between the pressing device and the scarf cutting device; and In the direction, and the upwardly directed scarf slope coated with the adhesive is lifted so as to be able to contact the downwardly directed scarf slope of the preceding scarf veneer, which is waiting at the clamping and joining position. After the clamping connection operation of the scarf slope is completed, the clamping unit is released to return to the original position after clamping, and the fiber direction of the veneer is clamped from above and below the scarf joints joined by the clamping unit. The bonded veneers pinching transport apparatus for transporting,
A veneer characterized in that the scarf veneer conveying level of the veneer clamping / transferring device is arranged lower than the scarf veneer conveying level of the bonded veneer clamping / transferring device so as to be orthogonal to the pressing device. Veneer vertical veneer