JPH1190904A - Longitudinal cutting device for veneer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the stable production of high-quality precisely scarf-jointed products by preventing the production of joint failure products due to adhesion failure. SOLUTION: This longitudinal cutting device comprises first and second veneer holding and carrying devices 10a, 10b for stopping a rear end portion of a leading veneer 4a and a front end portion of a following veneer 4b at predetermined positions of a scarf cutting location, first and second veneer scarf cutting devices 11a, 11b disposed, respectively, at scarf cutting positions of the leading and following veneers 4a, 4b, an adhesive applying device 12 for applying an adhesive to an inclined scarf surface of the leading veneer 4a, a veneer holding and carrying device for moving an inclined scarf surface of the following veneer 4b to an inclined scarf surface of the leading veneer 4a for overlaying the former on the latter and a pressure clamping and jointing device 14 for cold or thermally compressing the inclined scarf surfaces of the overlaid leading and following veneers 4a, 4b.

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.
Or about 1 to 4 mm in thickness and about 1.1 mm in length required to produce a long veneer laminated material commonly referred to as LVL or LVB.
A long veneer veneer of 5 to 6 meters is used
To obtain from a square veneer veneer of about 1 m or a rectangular veneer veneer of about 1 m x 2 m, a large number of rectangular veneer veneers are vertically stripped in the fiber direction and a long veneer veneer for laminated veneer is used. The present invention relates to a veneer veneer for producing planks.

[0002]

2. Description of the Related Art A conventional apparatus for cutting a slope of a scarf used in a vertical veneer for veneer veneers of this kind is disclosed in, for example, Japanese Utility Model Laid-Open No. 7-2.
No. 6101 Veneer veneer scarf cutting device and the like are configured to cut an upward scarf slope and a downward scarf slope with a single knife, as schematically shown in FIG. 8, for example. The rear end of the preceding veneer veneer 4a and the front end of the succeeding veneer veneer 4b are cut into a scarf slope by one movable blade 3 facing the anvil member 2 of the fixed blade 1 reciprocally. Was configured as follows. Furthermore, a veneer veneer of this type, which is conventionally known, is disclosed in, for example, a scarf joint device in a manufacturing process of a veneer laminated material disclosed in Japanese Patent Application Laid-Open No. 3-288603.

[0003]

The scarf slope according to the prior art described above is cut by a downward scarf slope 5a cut at the rear end of the veneer veneer plate 4a in FIG. As shown schematically, the upward scarf slope 5b cut at the front end of the plate 4b, particularly on one side of the scarf slope, for example, as shown in the drawing, the fiber direction by the rake face of the movable blade 3 on the scarf slope 5a side. The extended back crack 6 is generated not on the chip side but on the scarf slope 5a side of the preceding veneer veneer 4a to be commercialized, thereby forming an elastic bow-like bend on the scarf slope 5a. When the scarf slope 5a and the upward scarf slope 5b are overlapped with each other and vertically separated by an adhesive to produce a continuous strip-shaped scarf-joined veneer, an elastic bow-like shape formed on the downward scarf slope 5a side. Bending and back cracking and evil, can not stable strong bonding work, there is a problem such that produced many defective bonding article according to the so-called adhesion failure.

[0004] Furthermore, in the known veneer veneer vertical stripping technique, a veneer veneer is conveyed in the fiber direction, and its leading and trailing ends are cut by a pair of cutter blocks or the like.
This is conveyed by a sliding conveyor, and then glued together with a gluing device that also serves as a stopper, and then superimposed. Furthermore, it is sandwiched and conveyed by a clamping conveyor or the like, and the scarf is hot-pressed by a hot-pressing part. Sometimes the beard-like wood fiber remaining at the tip of the veneer was damaged, causing a slight joining error, and there was a possibility that a slight transfer deviation might occur in the sandwiching transfer from the overlapped portion to the hot-pressed portion. However, there have been problems such as the inability to stably produce a high-quality scarf-bonded veneer bonded accurately.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to achieve the above-mentioned object, in which the rear end of a veneer veneer conveyed in the fiber direction is stopped at a predetermined position of an upward scarf cutting position, A first and a second veneer clamping / transfer device comprising a veneer clamping / transporting mechanism for stopping the front end of a subsequent veneer veneer at a predetermined position of a downward scarf cutting position, an intermittent drive mechanism capable of numerical control, and the like; A single plate clamping mechanism with an anvil member disposed near the scarf cutting place and near the downward scarf cutting place, and a blade reciprocating mechanism for reciprocating a scarf cutting blade at a predetermined cutting angle. A first and a second veneer scarf cutting device, and a first veneer scarf cutting device disposed in the vicinity of the upward cutting position, formed on the rear end of the preceding veneer veneer. An adhesive application device for applying an adhesive to a scarf slope, and a downward scarf slope formed by a second veneer scarf cutting device disposed near the downward cutting location at a front end of a subsequent veneer veneer. And a second veneer clamping / transfer device for cutting the rear end portion of the preceding veneer veneer with a first veneer scarf cutting device and overlaying it accurately on an upwardly inclined scarf slope coated with an adhesive. A veneer clamping unit for moving the veneer veneer to the side of the preceding veneer veneer while clamping the subsequent veneer veneer between the veneer veneer and the veneer veneer; The above-mentioned veneer holding and moving device presses the upward and downward scarf slopes coated with the adhesive, which are superimposed one above the other, to form a continuous band-shaped scarf joining veneer by cold or hot pressure. Compression bar and It consists of a clamping joint apparatus comprising a reciprocating mechanism such as a vertical strip device veneer, wherein.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an example of the overall apparatus of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a side view showing the configuration of a main part of the apparatus of the present invention, and FIG. FIG. 5 is a side view illustrating a scarf cutting mode of preceding and succeeding veneer veneers, and FIG. 6 is a side view illustrating an adhesive applying mode to a scarf slope of a preceding veneer veneer. FIG. 7
FIG. 5 is a side view for explaining an aspect in which an upward scarf slope and a downward scarf slope are overlapped and a manner in which a scarf joint is pressed.

In FIGS. 1 and 2 showing an example of the entire embodiment of the apparatus of the present invention, reference numeral 7 denotes a single veneer 8 of a square or rectangular shape deposited on a lifting table from the top of a pile. A veneer veneer veneered by the veneer veneer delivered by the veneer veneer 7, and a single veneer for aligning one end in the direction orthogonal to the transport direction The veneer aligners 10a and 10b, which are composed of a detector, a conveyor, a ruler plate and a reciprocating mechanism, stop the rear end of the veneer veneer conveyed in the fiber direction at a predetermined position of the upward scarf cutting place. And a first and second veneer clamping / transfer mechanism comprising a veneer clamping / transfer mechanism for stopping the front end of the subsequent veneer veneer at a predetermined position in a downward scarf cutting place and an intermittent drive mechanism capable of numerical control. Dress , 11a and 11b are a single-plate clamping mechanism with an anvil member and a knife for reciprocating a knife for scarf cutting at a predetermined cutting angle, which are provided near an upward scarf cutting place and near a downward scarf cutting place, respectively. A first and second veneer scarf cutting device 12 composed of a reciprocating mechanism or the like, 12 is a first veneer veneer veneer rear end which is a first veneer scarf cutting device 11a disposed near an upward cutting position. An adhesive application device configured to apply an adhesive to an upwardly inclined scarf slope formed in a portion, 13 is a second veneer scarf cutting device 11b disposed near a downward cutting location, and a subsequent veneer. The downward facing scarf slope cut at the front end of the veneer is cut into a scarf slope at the rear end of the preceding veneer veneer in the previous step, and adhesive is applied to the slope to temporarily stop. Subsequent veneer veneer stationary between the second veneer clamping and transferring device 10b and the second veneer scarf cutting device 11b for accurately overlaying the downwardly directed scarf ramp on the directed scarf ramp. A single-plate clamping and moving device comprising a single-plate clamping mechanism for accurately moving to the side of the preceding veneer veneer while movably clamping the veneer and a reciprocating moving mechanism capable of numerical control, and 14 is a single-plate clamping and moving device 13. A pressing bar that can be cold- or hot-pressed by pressing vertically from above and below the joints of the upward and downward scarf slopes that are superimposed vertically and coated with adhesive between the layers to form a continuous strip-shaped scarf-joined veneer And a press-joining device 15 composed of a reciprocating mechanism, etc., which is a single plate for cutting a continuous band-shaped scarf-joined single plate carried out by the first single-plate clamping and transferring device 10a at predetermined fixed-size dimensions. Detector And a cutting device 16 including a cutting machine. An opening / closing bar 16 is located on the carry-out side of the cutting device 15 for dropping and depositing the cut single-sized plate 17, a reciprocating mechanism, and a lifting table. And the like.

Next, FIG. 3 shows a main part of the configuration of the apparatus of the present invention.
Is a second veneer clamping / transferring device 1 from the loading side of veneer veneer.
0b, veneer clamping / moving device 13, second veneer scarf cutting device 11b, first veneer scarf cutting device 11a, adhesive application device 12 and crimping and joining device 14 attached thereto, first veneer clamping The transfer device 10a is arranged in series on the unloading side. In the figure, the first and second single-plate clamping and transferring devices 10a, 10b are provided with a roll conveyor 18a,
18b, operating mechanisms 19a and 19b such as air cylinders capable of holding and opening control, and intermittent driving mechanisms 20a and 20b such as an AC servomotor capable of numerical control, and the preceding veneer conveyed in the fiber direction. Veneer 4
The rear end of a was stopped at a predetermined position slightly before the anvil member 28a at the upward scarf cutting place, and the front end of the subsequent veneer veneer 4b slightly exceeded the anvil member 28b at the downward scarf cutting place. The transfer is performed intermittently so as to stop at a predetermined position. Further, the single-plate holding / moving device 13 is a roll conveyor 21 having an intermittent drive mechanism 20c such as an AC servomotor capable of numerical control.
And an operation mechanism 22 such as an air cylinder capable of holding and opening control, and a numerically controllable reciprocating movement mechanism 23 in which a rack gear is associated with an intermittent drive mechanism 20d such as an AC servomotor. The second veneer scarf cutting device 11b disposed near the cutting place cuts the downward scarf slope formed on the front end of the subsequent veneer veneer into the first veneer veneer at the rear end. The scarf is cut by the scarf cutting device 11a and moved so as to be accurately overlapped on the upward scarf slope on which the adhesive is applied. Next, the first and second single-plate scarf cutting devices 11a and 11b are used for cutting a knife 2 such as a knife for scarf cutting.
Slider 2 in which 4a and 24b are arranged at a predetermined cutting angle
5a, 25b slidably mounted on the cranks 26a, 2
6b and a blade reciprocating mechanism for reciprocating by motors 27a, 27b, etc .; And a single-plate clamping mechanism in which the pressurizing plates 30a and 30b are vertically movably mounted.
The first veneer scarf cutting device 11a further includes an adhesive for bonding, such as a thermoplastic adhesive such as hot melt or a urea resin, on an upward scarf slope cut at the rear end of the veneer veneer. An adhesive coating device 12 that is set to a short distance by an operating mechanism 32 such as an air cylinder and spray-coated so that a thermosetting adhesive such as a melamine resin or a resorcinol resin can be sprayed from a short distance by an injection nozzle 31 or the like. In addition to being attached, the upward scarf slope and the downward scarf slope are overlapped vertically and integrally in the subsequent process, and the joint where the adhesive is applied between the layers is pressed from above and below, and the continuous band-shaped scarf joining single plate A compression joining device 14 comprising a compression bar 33 capable of cold or hot pressure and an operating mechanism 34 such as an air cylinder is installed above the joining place, and the main part of the device of the present invention is Re is one that is related to the structure, respectively. Note that G in the figure and members in the vicinity thereof are single plate delivery guides for the connection space.

FIG. 4 for explaining the fixed position stop of the preceding and succeeding veneer veneers in the apparatus of the present invention is shown in FIG. 4 with the rear end of the preceding veneer veneer 4a and the leading end of the subsequent veneer veneer 4b facing upward and downward, respectively. Anvil member 28 at scarf cutting location
The roll conveyor 18a and the roll conveyor 21 of the single-plate clamping / moving device 13 are stopped so that the rear end and the front end thereof are stopped at a predetermined position slightly before and a predetermined position slightly beyond 28a and 28b, respectively. Roll conveyor 18 including
b, intermittent drive mechanisms 20a, 20b, 20 capable of numerical control
The configuration is such that the desired fixed-position stop operation can be accurately achieved by c.

Next, a description will be given of a scarf cutting mode of the preceding veneer veneer veneer of the apparatus according to the present invention. FIG. 5 shows that the rear end portion of the preceding veneer veneer 4a is subjected to a scarf cutting by a cutting tool 24a and an anvil member 28a at a predetermined cutting angle. In order to form an upward scarf slope, the chip Wa is separated by reciprocating motion of the crank 26a to separate the chips Wa, and the scarf cutting of the tip of the subsequent veneer veneer 4b is performed by the cutting tool 24b and the anvil member 28b.
In this way, the cutting is performed by reciprocating the crank 26b to separate the chips Wb so as to form a downward scarf slope at a predetermined cutting angle. The anvil members 28a and 28b gradually wear due to the sliding of the blades of the blades 24a and 24b, and gradually become poor in sharpness. Therefore, the step-out mechanisms 35a and 35b that sequentially feed an amount corresponding to the wear in accordance with the number of cuts. Are provided to compensate for the sharpness of the scarf slope for a long period of time.

Next, FIG. 6 for explaining an application mode in which an adhesive for joining is applied on an upwardly inclined scarf slope formed on the rear end portion of the veneer veneer veneer of the present invention is shown in FIG. 4a, the adhesive injection nozzle 31 descends to a close distance by an operating mechanism 32 such as an air cylinder and injects an appropriate amount of the adhesive in a drip or linear manner onto the upwardly inclined scarf cut at the rear end. The injection nozzle 31 is moved in the direction perpendicular to the conveying direction to set an appropriate linear coating width, if necessary, but a normal coating roll or the like can also be used. is there.

Further, an adhesive is applied on an upward scarf slope formed on the rear end of the preceding veneer veneer of the present invention, and the adhesive is applied to the top of the following veneer veneer. FIG. 7 for explaining a mode of superimposing the cut scarf slopes on which the cut down scarf slopes are overlapped is shown. FIG. 7 shows the preceding veneer veneer 4a, which is stationary with the upward scarf slopes cut, and the succeeding veneer veneer. 4b is moved forward by a predetermined amount precisely toward the upward scarf slope by a numerically controllable reciprocating moving mechanism 23 or the like in which the single-plate holding / moving device 13 is associated with an intermittent drive mechanism 20d such as an AC servomotor with a rack gear. It is configured such that the downward scarf slope is accurately overlapped with the upward scarf slope. Of course, during this movement, the clamping state of the second veneer clamping / transferring device 10b on the loading side with respect to the subsequent veneer veneer 4b is released by the operating mechanism 19b, and is instead mounted on the reciprocating moving mechanism 23. Roll conveyor 21
The clamping state of the subsequent veneer veneer 4b is controlled so as to be replaced by the veneer veneer 13 by the actuation of the operating mechanism 22 such as an air cylinder. FIG. 7 shows that a scarf joint having an upward scarf slope and a downward scarf slope is vertically overlapped, and an adhesive is applied between the layers to press a scarf joint from above and below to produce a continuous band-shaped scarf joint veneer. This also shows the mode of pressing the scarf joint, and the pressing bar 33 that can be cold- or hot-pressed is lowered by an operating mechanism 34 such as an air cylinder to press the scarf joint for a short time to join. It is configured as follows.

[0013]

As described in detail above, the apparatus of the present invention cuts upward and downward scarf slopes separately by a single-plate scarf cutting device using first and second two blades. Therefore, the elastic blade extending in the fiber direction by the rake face of the movable blade, such as when the upward scarf slope and the downward scarf slope are alternately cut by one blade as in the conventional apparatus. The back crack bent in the shape of a bow does not appear on the chip side, it occurs on the scarf slope side of the preceding veneer veneer to be commercialized, and when the scarf is joined with the adhesive in the subsequent process, it will face the downward scarf slope. Due to the elastic bow-like bending and back crack generated at the joint where the upward scarf slopes are overlapped, the adhesive solidification of the joint by short-time pressing with the adhesive causes the bow-like repulsion force and the adhesive to the back crack Not only was it possible to completely eliminate the problems that were difficult due to infiltration, making stable and strong joining work impossible and producing a large number of poorly joined products due to poor adhesion, and the device of the present invention was used for the following veneer veneer By the veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneers Since it is based on precision moving superimposing means, the adhesive is applied and superimposed using a gluing device that also serves as a stopper, as in the conventional device, and furthermore, is sandwiched and conveyed by a clamping conveyor or the like, and is hot-pressed by the scarf hot-pressing section. At the time of scarf cutting, the beard-like wood fiber remaining at the end of the veneer at the end of the veneer causes a slight joining error due to the damage, and the clamping from the overlapping part to the hot pressing part Since the problem that caused a delicate conveyance deviation in the conveyance was completely wiped out, when using the apparatus of the present invention, the mutual scarf slopes were flat and strongly bonded, and the bonding precision was extremely high. The product was produced efficiently, and the implementation effect was remarkable.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of the overall embodiment of the device of the present invention.

FIG. 2 is a plan view showing an example of the overall embodiment of the device of the present invention.

FIG. 3 is a side view showing a configuration of a main part of the device of the present invention.

FIG. 4 is a side view illustrating a fixed-position stopping mode of preceding and succeeding veneer veneers.

FIG. 5 is a side view for explaining a scarf cutting mode of preceding and succeeding veneer veneers.

FIG. 6 is a side view illustrating a manner of applying an adhesive to a scarf slope of a veneer veneer in advance.

FIG. 7 is a side view for explaining an overlapping mode of an upward scarf slope and a downward scarf slope and a pressing mode of a scarf joint.

FIG. 8 is a side view for explaining a scarf cutting mode of a conventional device using one blade.

FIG. 9 is a side view of a downward scarf slope which has been scarf-cut by a conventional apparatus using one blade.

FIG. 10 is a side view of an upwardly directed scarf slope that has been scarf-cut by a conventional apparatus using one blade.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed blade 2 Anvil member 3 Movable blade 4a Leading veneer veneer 4b Subsequent veneer veneer 5a Downward scarf slope 5b Upward scarf slope 6 Back cracks extending in the fiber direction 7 Veneer veneer 9 Veneer veneer 9 Veneer veneer alignment Apparatus 10a First veneer clamping / transferring device 10b Second veneer clamping / transferring device 11a First veneer scarf cutting device 11b Second veneer scarf cutting device 12 Adhesive coating device 13 Veneer clamping / transferring device 14 Pressure Tightening and joining device 15 Standard cutting unit 16 Stacking device 17 Standard single plate 18a Roll conveyor 18b Roll conveyor 19a Operating mechanism 19b Operating mechanism 20a Intermittent driving mechanism 20b Intermittent driving mechanism 20c Intermittent driving mechanism 20d Intermittent driving mechanism 21 Roll conveyor 22 Operating mechanism 23 Reciprocating mechanism 24a Blade 24b Blade 25a Slider 25b Slider 26a Crank 26b Crank 27a Motor 27b Motor 28a Anvil member 28b Anvil member 29a Pressing member 29b Pressing member 30a Pressing plate 30b Pressing plate 31 Injection nozzle 32 Operating mechanism 33 Pressing bar 34 Operating mechanism 35a Take-out mechanism 35b Take-out mechanism G Veneer delivery guide Wa Chip Wb Chip

Claims (1)

[Claims] 1. A veneer veneer to be transported in the fiber direction is stopped at a rear end of a veneer veneer at a predetermined position at a cutting position of a scarf, and a front end of a veneer veneer is moved to a predetermined position at a cutting position of a downward scarf. First and second veneer clamping / transferring devices including a veneer clamping / transferring mechanism to be stopped, an intermittent drive mechanism capable of numerical control, etc., and a vicinity of the upward scarf cutting place and a vicinity of the downward scarf cutting place, respectively. A first and second veneer scarf cutting device comprising a veneer clamping mechanism with an anvil member and a blade reciprocating mechanism for reciprocating a blade for scarf cutting at a predetermined cutting angle; A first veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer A second veneer scarf cutting device, which is disposed near the cutting site, cuts a downward scarf slope formed at the front end of the subsequent veneer veneer into a first veneer at the rear end of the preceding veneer veneer. Subsequent veneer veneer between a second veneer clamping / transfer device and a second veneer scarf cutting device for accurately superimposing on an upwardly inclined scarf slope coated and adhesively cut by a scarf cutting device Veneer, which is composed of a veneer clamping mechanism for moving the veneer veneer to the side of the veneer veneer and a reciprocating moving mechanism capable of numerical control, and an adhesive vertically stacked by the veneer clamping veneer. And a pressure-bonding device consisting of a cold- or hot-pressable pressure-bar, a reciprocating mechanism, and the like, which press the upper and lower scarf slopes coated with the agent from above and below to form a continuous strip-shaped scarf-joining single plate. Is characterized by consisting of Vertical Hagi apparatus of veneer that.