JP2007090572A - Decorative sheet-pasted woody member with small r angle ridge and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative sheet hollow assembled woody member with a small R angle ridge for a flush door or furnitures, and its manufacturing method. <P>SOLUTION: In the manufacturing method of a woody assembled member for bending a decorative sheet-pasted woody flat sheet material so as to straddle an angle ridge of strength aggregate, a first processing process is a process for cutting or grinding at least the pasting-scheduled surface of a decorative sheet of the woody flat sheet material 1 to form a linear groove and the cross-sectional shape of the surface groove 2 of the woody flat sheet material 1 is formed by carving a normal surface 3 into the expanded R groove shape expanded in an arcuate form. A second processing process is a decorative sheet-pasting process by a lapping method. In a third processing process, the decorative sheet-pasted woody flat sheet material is bent at its groove part to be assembled so as to hold its bending angle by the adhesion with the strength aggregate 7 to obtain the decorative sheet-pasted woody member product. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for producing a wood sheet assembly member with a decorative sheet. This technology can be applied to flash doors, tables and furniture.

  When corner material (R, Earl) is required for a wood member with a decorative sheet, there is a method in which a decorative sheet is attached to this by a vacuum method after finishing the corner processing of the corner ridges of the wooden substrate. However, this method is low in productivity and high in cost. In addition, since the vacuum method is performed on the basis of the main surface having the widest area, it is difficult to attach a decorative sheet to the back surface, side surface, or the corner ridge near the back surface. Therefore, in reality, a method of attaching and assembling different members on each side is often used, but most of them are in a state where the decorative sheet is cut or easily damaged at the corner, and the commercial value is low and in use The trouble that the adhesion part peeled off continued.

  The bending technology of the wood sheet material with decorative sheet is that the wood material is not ductile like metal materials and polymer materials, and because it is damaged by bending, it engraves a plurality of parallel V-grooves on its back and closes it. It was only possible to make a polygonal pseudo-arc by bending it in the direction, or to make it a large radius that is several times the plate thickness.

In order to reduce the damage to the wood material, the wood material is partially removed by engraving a groove (V groove) having a V-shaped cross section, leaving only the decorative sheet on the decorative sheet-attached flat plate. Although attempts have been made to bend so that the groove is closed, leaving a slight thickness on the surface, the corner decorative sheet and wood members are easily damaged during bending and use as a product, and the corner shape finish The condition was not stable and the product value was low.
With shallow parallel V-grooves, not only a polygonal approximate arc can be obtained, but when the V-groove interval is approached, the groove slope (groove slope) is damaged during cutting or grinding, and the shape is disturbed. Irregularity appeared in the Earl part. If rounds and polygons remain on the inner surface, the corner ridges of the core material (reinforcement aggregate) also need to be processed into a shape that suits this beforehand, which not only increases the number of processing steps, but in the end A wood member with a corner ridged decorative sheet was not obtained.

  For example, Japanese Patent Application Laid-Open No. 09-112147 is a method for preventing the flash door from warping, but another edge member (reinforcement aggregate) is used for the end face, and bending is not performed.

  Japanese Patent Application Laid-Open No. 09-317334 shows a reinforced material (reinforcement aggregate) to which a decorative sheet is attached, but the decorative sheet-attached flat plate is not bent.

  In Japanese Patent Laid-Open No. 2003-253969, the front end of a flat plate base member of a flash structure door member is V-cut and bent at a right angle, but the outer corners are sharp and not rounded.

  Japanese Patent Application Laid-Open No. 2003-211418 discloses a V-cut bending method of a plywood core material and a technique of a bent plywood core material manufactured by using this method. I can't.

  Japanese Patent Application Laid-Open No. 06-344509 is a method for manufacturing a V-cut decorative board. A V-shaped cutting groove is formed on the back surface of a base material and the cutting groove is bent and bonded, but only a pseudo arc having a large curvature can be formed. .

  Japanese Patent Application Laid-Open No. 07-259244 discloses a decorative composite plate having a curved edge and a method for manufacturing the same, but the bending radius is as large as half of the core material thickness plus two decorative flat plates.

  Japanese Patent Application Laid-Open No. 2003-033902 discloses a method of manufacturing a panel that is bent at a V-cut position by a heating vacuum press. However, this method not only increases the cost, but a small 90 degree bend is caused by material breakage. difficult.

  A first object of the present invention is to provide a method for mass-producing a wooden sheet member with a small rounded corner ridge-attached decorative sheet having excellent quality at low cost. A second object of the present invention is to provide a method for producing a wood member with a small rounded corner ridged decorative sheet that is bent at 1 to 4 locations seamlessly. Furthermore, a third object of the present invention is to provide a decorative sheet-assembled wood member with a small radius corner ridge that is less likely to damage the corner radius portion.

Means 1 for solving the problem

The present invention is configured as follows to solve the problems.
In the method for manufacturing a wooden assembly member in which a decorative sheet-attached wooden flat plate is folded and pasted across the corner ridges of the strength aggregate, the first processing step is to form a straight groove on at least the surface of the wooden flat plate 1 on which the decorative sheet is to be applied. It is a step of cutting or grinding, and most preferably a step of cutting or grinding a straight groove by aligning the groove bottom position with both surfaces of the wooden flat plate 1.
The cross-sectional shape of the surface groove 2 of the wooden flat plate 1 is engraved in a bulging round groove shape in which the slope 3 is bulged in an arc shape, and one end of the groove slope is smoothly on the plate surface. The center is the groove bottom B, and the other end is in smooth contact with the plate surface.
The most preferable condition when the straight groove is cut or ground by aligning the groove bottom position on both sides is that the back groove 5 of the wood plate 1 has the V groove groove angle of the straight slope 4 substantially equal to the bending angle. It is to be engraved in a V-groove shape.
The groove bottom remaining thickness t is set to an extremely thin range of 0.05 to 0.40 mm.

  The second processing step subsequent to this is a decorative sheet sticking step by a wrapping method, in which an oily / oil-soluble adhesive material / adhesive is applied to one surface of the decorative sheet 6, and the coated surface is applied to the above-mentioned surface by a roll. Pressing and sticking to the surface of the wooden flat plate material 1 is to proceed to the next step after leaving the decorative sheet adhered to the bulging round slope to be lifted from the groove bottom.

  The third processing step following this is a step of assembling so that the decorative sheet-attached wood plate is folded at the groove and the bending angle is maintained by adhesion to the strength aggregate 7, and adjacent to the strength aggregate 7. The surface to be bonded is a complementary angle of the above-mentioned bending angle, and water-based or water-soluble pressure-sensitive adhesive / adhesive is applied to at least one of the surface to be bonded straddling the corner ridge A or the surface to be bonded of the wooden flat plate 1 Apply these coatings, and press them while heating the electromagnetic wave in a state where the surfaces to be bonded are in contact with each other via an aqueous / water-soluble adhesive / adhesive to heat-dehydrate and cure the aqueous / water-soluble adhesive / adhesive. At the same time, the adhesive sheet is assembled while applying electric power necessary to raise the temperature of the decorative sheet surface to a temperature range of 60 to 160 ° C. by this heat generation. It is a method of manufacturing a wood.

Means 2 for solving the problem

The present invention can be configured as follows to solve the problems.
In the manufacturing method of a wooden assembly member that bends and pastes a wooden flat plate with a decorative sheet across the corner edges of a strong aggregate, the first processing step is to cut a straight groove by aligning the groove bottom position on both sides of the wooden flat plate 1 It is a grinding process, and the cross-sectional cutting shape of the surface groove 2 of the wooden flat plate 1 is engraved into a bulging round groove shape in which the slope 3 is bulged, and this groove One end of the slope is in smooth contact with the plate surface, the center is the groove bottom B, and the other end is in smooth contact with the plate surface, and the back surface groove 5 of the wood plate 1 is a V-groove groove of the straight slope 4 Means for solving the problem characterized in that the groove is engraved in a V-groove shape that is substantially equal to the bending angle, and the groove bottom remaining thickness t is in an extremely thin range of 0.05 to 0.40 mm. It is a manufacturing method of the decorative sheet pasting wood member with a small rounded corner ridge according to item 1. .

Means 3 for solving the problem

The present invention can be configured as follows to solve the problems.
The V-groove according to means 2 for solving the problem on the surface to which the decorative sheet is not attached after the decorative sheet sticking step by the lapping method which is the second processing step according to means 1 for solving the problem. It is a manufacturing method of the wood sheet member with a decorative sheet | seat with a small radius corner ridge characterized by adding the process carved in a shape.

Means 4 for solving the problem

The present invention can be configured as follows to solve the problems.
Glue processing of the front and back surfaces of the wooden flat plate is carried out continuously by shifting the processing position back and forth, and the adhesive used in the subsequent process at the bottom of at least one of the front and back surfaces on the same line immediately after the groove processing 4. A method for producing a wood sheet member with a decorative sheet with a small rounded corner ridge according to claims 1 to 3, for applying the adhesive that does not impair the performance of the material and drying once prior to bending. is there.

Means 5 for solving the problem

The present invention can be configured as follows to solve the problem and achieve the third object.
A wood assembly member that is made by folding and pasting a wood sheet with a decorative sheet across the corner ridges of a strong aggregate has wood fibers continuous at the folded part, and the rounded parts on both sides are almost arc-shaped by cutting or grinding. In this folding position, a wood sheet member with a small rounded corner ridge is provided with a thicker adhesive layer remaining between the decorative sheet and the other position.

  The wood flat plate 1 used in the present invention is not only a single plate, but also a plywood (Plywood cross-laminated plate), a PB (Particle Board chipboard) formed by adding an adhesive to a small piece of wood (chip), MDF (Medium Density Fiberboard, medium density fiberboard) or LVL (Laminated Veneer Lamber same direction laminated board), which is obtained by hot-pressing thinned wood into a fibrous form, can be used.

  The material and thickness of the decorative sheet used in the present invention may be those used for lapping, may be a laminated film sheet or embossing, and may contain fibers or metal foil. The decorative sheet only needs to have an average tensile strength and a breaking elongation characteristic of 5% or more, and most of the commercially available decorative sheets satisfy this condition. As an example of the material of such a decorative sheet, in addition to PVC (vinyl chloride resin) and olefin-based materials, stretched coated paper or cloth containing chemical fibers can also be used.

  The water-based / water-soluble pressure-sensitive adhesive / adhesive used in the present invention is a pressure-sensitive adhesive / adhesive containing water as a main component of a medium or solvent, and has an adhesive force or pressure-sensitive adhesive strength or stability that increases with dehydration It is a generic name and includes what is generally abbreviated as an aqueous adhesive. For example, water-based and water-soluble adhesives mainly composed of acrylic, water-soluble synthetic rubber, aqueous vinyl urethane, isocyanate, urea, melanin, phenol, resorcinol, vinyl acetate emulsion, etc. Alternatively, the so-called woodworking bond or the like can be used and is not particularly limited. Moreover, a viscosity modifier, a crosslinking agent, a medium, and a solvent can be added as needed to adjust the viscosity and the curing time. Hereinafter, an aqueous / water-soluble pressure-sensitive adhesive / adhesive is abbreviated as an aqueous adhesive.

The oil-based / oil-soluble pressure-sensitive adhesive / adhesive used in the present invention is a pressure-sensitive adhesive / adhesive containing an organic solvent as a main component of a medium or solvent, and volatilization of an organic solvent or solidification or chemical reaction of a solvent or solute Along with this, it is a general term for those in which the adhesive strength or adhesive strength is strengthened and stabilized. In general, oil adhesives, oil-soluble adhesives, non-aqueous adhesives, solvent-based adhesives, etc. are used. In addition to the one-component type, a two-component type in which a curing agent is mixed immediately before use is also used. There is no particular limitation. However, the formaldehyde system is not preferable for health.
As a typical oil-based / oil-soluble pressure-sensitive adhesive / adhesive used in the present invention, a polyurethane resin as a main component can be used, and as a pressure-sensitive adhesive, a natural rubber latex as a main component can be used. Hereinafter, oil-based and oil-soluble pressure-sensitive adhesives / adhesives are abbreviated as oil-based adhesives.

  The adhesive can be peeled off after bonding, and in some cases is limited to the one that can be re-adhered, but in the present invention, both adhesives and adhesives can be used in the present invention. The distinction between the two does not need to be strict.

  For the grooving according to the present invention, a molder that cuts the material by penetrating the material between the multi-axis drive blades and a router that cuts the material by numerically controlling the position of the multi-axis drive blade are suitable as the cutting machine. In addition, a grinding machine such as a sander can be used.

The heating and pressing device used in the present invention is for bonding and fixing the shape of the assembly member. The adhesive used inside is a water-based adhesive containing moisture capable of generating heat internally, and preferentially generates heat by electromagnetic wave heating and rapidly solidifies. This adhesive becomes strong and pressure is applied until the shape is fixed.
An electromagnetic wave thermocompression bonding apparatus is most suitable for the present invention. In particular, as shown in FIG. 6, in addition to the upper and lower pinching rolls immediately after the heating device, if a pressing roll or a pressing guide plate is also arranged on the left and right, mass production of a wooden member with small corner ridges having two corners or four corners can be achieved. It becomes possible.

By configuring the present invention as described in the means 1 for solving the problems, the following actions and effects can be exhibited.
The first flat plate groove processing step is a step of processing a linear groove on at least one surface of the wooden flat plate material 1. This groove facilitates folding at this position. The portion that becomes the corner ridge after bending is the surface groove 2 of the wooden flat plate material.
The cross-sectional shape is unique in that no other example is seen. That is, the surface groove 2 of the wood flat plate 1 is formed in a circular arc shape by cutting or grinding in advance, so that a corner ridge R is formed only by bending the groove bottom B in a rising direction. The reason why the groove slope faces the plate surface smoothly is to make the bent portion appear smooth.

Such a rounded corner ridge shape obtained by bending the decorative sheet-attached flat plate does not occur by bending, but a round shape that has been cut and formed in advance appears outside the groove when it is bent at the groove bottom B. Therefore, the residual stress and distortion due to bending do not occur except for the groove bottom B, and the fear of breakage is eliminated except for the groove bottom.
What should be noted in the present invention is that the groove bottom is bent in a stress state that is not easily damaged. According to material mechanics, when a flat plate is bent, the maximum tensile stress acts on the outer surface of the bend and the maximum compressive stress acts on the inner surface, and the stress state therebetween changes linearly between both surfaces. Although the fracture starts at the position of the maximum tensile stress, in the configuration of the present invention, the tensile stress at the groove bottom is reduced or conversely changed to a compressive stress.

  That is, in the configuration of the present invention, the decorative sheet 6 is attached to the surface of the wooden flat plate material in the subsequent step and then folded outward, so that tension is applied to the decorative sheet, and an equivalent compressive force is applied to the groove bottom. Since it acts on the remaining thickness t, the groove bottom surface tensile stress is greatly reduced, and when the strength of the decorative sheet is high, the entire groove bottom changes to compressive stress. When the strength of the decorative sheet is further increased, the remaining groove bottom thickness t is buckled by the compressive stress and increases in thickness. In the present invention, even if this buckling is remarkable, it does not open due to compressive stress. This part is wrapped with adhesive in the lower layer of the Koko sheet, and is not a brittle wood material, but exhibits properties as a polymer material with excellent ductility, and the adhesive is re-dissolved by heating after bending. Since the dents are filled and smoothed, the product value is unlikely to be impaired. The stress is a value obtained by dividing the force by the cross-sectional area on which the force acts.

In the general case where there is no decorative sheet, if the same material is bent to the same bending radius, the thinner the plate thickness, the harder it is to break. As a practical matter, the thin wall limit is damaged by cutting, handling, and inappropriate bending operations, so there is a natural limit to thin wall, and in the case of wooden members, the groove bottom residual thickness is industrially reduced to 0.50 mm or less. Cutting was unthinkable. In the state-of-the-art technology, 0.40 mm or more has been achieved in small-scale production of small items, but there is no known example for large practical products such as flash doors.
In the present invention, the groove bottom remaining thickness t is limited to an extremely thin thickness of 0.05 to 0.40 mm, but a technique for stably achieving this industrially with a wood material will be described later. In addition, after sticking a decorative sheet, it is protected by the decorative sheet, and damage to the bottom of the groove during subsequent groove processing, handling, or bending is reduced.

  In the case of the basic shape in which the arc of the bulging round slope is left and right symmetrically engraved approximately 45 degrees and bent 90 degrees, even if slight shape disturbance is observed at the rounded end after bending, as shown in FIG. Thus, it becomes a single arc of approximately 90 degrees. As a derivative form, it is possible to smoothly connect a plurality of arcs or change the left and right arc radii. The latter expands the degree of freedom of design, and the effect appears as the wall thickness T of the wooden flat plate 1 increases. In this case, only the surface, that is, the outer radius is changed by the cutting or grinding shape, and the groove angle of the inner V groove is made equal to the bending angle. It is not necessary to add a round process to the edge of the strength aggregate 5 in advance, and the cost can be reduced.

  In other words, in the case of the basic shape, the groove arc R is substantially equal to the plate thickness T, one end thereof smoothly touches the plate surface, the center becomes the groove bottom B, and the other end smoothly touches the plate surface. After processing, a single small radius that is substantially equal to the plate thickness T is obtained. That is, the arc length of one slope is approximately one eighth of the circumferential length 2πT, and the total arc length on both sides is approximately one quarter of the week length. Accordingly, the round of the decorative sheet pasting assembly member is substantially a round obtained by adding the decorative sheet thickness S to the thickness T of the wooden flat plate material. However, the present invention is not limited to this basic form simplified for the sake of explanation, and this round is determined by the cutting shape, and it is easy to select asymmetrical left and right rounds.

As described in the means 2 for solving the problems in the present invention, when a straight groove is cut or ground by aligning the groove bottom position on both sides of the wooden flat plate material 1, a V groove is formed on the back surface. . The V-groove improves the accuracy of the folding position of the back surface and the shape and strength in the vicinity thereof, and at the same time makes it possible to select a small surface radius even for a thick wooden flat plate. Moreover, excessive local elongation of the decorative sheet located in the groove portion can be prevented, and the breakage and pattern disturbance can be prevented.
In the present invention, when the front surface and the back surface are used in comparison, the front surface is the surface on which the decorative sheet is applied, and the back surface is the surface on the opposite side to which the strength aggregate is bonded. It is unrelated to the lower surface.

In the present invention, as described in the means 4 for solving the problem, the groove processing of the front and back surfaces of the wooden plate material is continuously performed by shifting the processing position back and forth, thereby preventing mechanical resonance and high speed. Processing becomes possible, and it becomes possible to accurately finish a complicated shape other than a single arc.
Then, on the same line immediately after the groove processing, an adhesive that does not impair the performance of the adhesive used in the post-process, for example, the same kind of adhesive, is applied to the bottom of the groove on the front surface or the back surface, and is dried once before bending. By doing this, it becomes possible to strengthen the groove bottom as a polymer material film and prevent breakage. This adhesive not only as a thin film on the surface layer, but also penetrates into the fragile wood material and becomes a composite material in which the wood material and the polymer material are not easily broken.

The second processing step is a decorative sheet sticking step by a wrapping method, in which an oil-based adhesive is applied to one surface of the decorative sheet 6 and this applied surface is pressed and attached to the surface of the wood plate 1 by a roll. However, until the decorative sheet that has been bonded to the bulging R slope is restored to the straight line due to its tension, the separation at the groove proceeds, and at least at the groove B, the decorative sheet is lifted from the groove bottom almost over the entire length. It is to proceed to the next process after leaving it.
At this time, even when the adhesive is excessively accumulated in the groove than the other surface and is separated from the surface of the wood material, it is considered that the decorative sheet is lifted from the groove bottom. In short, since the decorative sheet is lifted from the vicinity of the groove bottom and the surrounding oil-based adhesive is softened, local deformation of the decorative sheet at this position can be alleviated when the decorative sheet-attached flat plate is bent.

  Most of the surface grooves 2 of the wood flat plate material include voids, and the oil-based adhesive in that portion is allowed to dry naturally and rest. The sleepable time, that is, the time from application of the decorative sheet to the regeneration of the adhesive function is about 8 hours on the basis of the plate surface for many commercially available oil-based adhesive products, but by adjusting the concentration and temperature of the organic solvent and curing agent, It can be extended up to about 24 hours. In order to restore the dormant adhesive, the third processing step must be started within this time.

While waiting for the next process, the decorative sheet in the groove continues to be restored toward the straight line, and the peeling progresses. The progress of the peeling is more remarkable in the adhesive material than in the adhesive. The fragile groove bottom is reinforced by this decorative sheet and is less likely to be damaged by handling for subsequent processing.
It is not necessary to dry the adhesive between the decorative sheet and the wooden flat plate before starting the next process. Rather, starting the next folding assembly process in a dry state will ensure adhesive resuscitation at the bottom of the groove. It is desirable to alleviate local deformation of the decorative sheet.

  During the sleep period, the breakage of the groove bottom B can be improved by the technique described in the means 3 for solving the problem. That is, by adding the back surface V-groove processing described in the means 2 for solving the problem to the surface on which the decorative sheet is not applied after the decorative sheet attaching step by the wrapping method, the thickness of the groove bottom until this step is added. Is thickened to prevent breakage, and after reinforcing with a decorative sheet, the groove bottom remaining thickness t is finished to an extremely thin range of 0.05 to 0.40 mm. In this processing, rough processing may be performed on the back surface of the wooden flat plate material in the first step. Even if local groove bottom tearing occurs in this processing step, it is reinforced with a decorative sheet, and there is little possibility of discrepancies or separation at this tearing position. As a result, the adhesive flows into the dents and the uneven parts, and the appearance problem and strength reduction do not occur.

The third processing step is an assembling step between the decorative sheet-attached wood flat plate and the strength aggregate 7, wherein the decorative sheet-attached wood flat plate is bent at the groove, and the bending angle is bonded to the strength aggregate 7. Assemble to keep by.
Since the adjacent bonding scheduled surface of the strength aggregate 7 is a complementary angle of the above-described bending angle, if the bending is performed so that the bonding bonding surface of the inner surface of the decorative sheet is aligned here, the target bending angle is stabilized. . A water-based adhesive is applied to both surfaces to be bonded across the corner ridge A. If there is a V-groove on the back side, it is applied in the same manner as necessary.

  These surfaces to be bonded are pressed while being heated by electromagnetic waves in a state of being in contact with each other through the aqueous adhesive, and the aqueous adhesive is heated and dehydrated and cured. At this time, moisture in the pressure-sensitive adhesive / adhesive is preferentially heated by electromagnetic waves, dehydrated and cured, and exhibits an adhesive function. This heat is transmitted to the decorative sheet that is in contact with the surface of the rounded portion and the oil-based adhesive applied to the inner surface, and the adhesion performance is revived and bonded. The input power at this time is suitably a value for raising the outer surface of the decorative sheet to a temperature range of 60 to 160 ° C. The lower limit of the temperature range is limited by the resuscitation of the adhesive applied to the decorative sheet and the drying rate of the aqueous adhesive on the inner surface, and the upper limit is limited by the finished state of the decorative sheet. The upper limit is influenced by the material of the decorative sheet, and in the case of a high strength or heat resistant material, the upper limit can be further expanded.

  In short, in the second processing step, the decorative sheet and the flat plate are first bonded, and in the third processing step, the adhesive between the decorative sheet and the groove portion is revived by heat transfer from the wood material, so that The effect | action and effect which repair adhesion | attachment are obtained, correcting the expansion | extension and position of a decorative sheet. It heats the internal water-based adhesive preferentially by electromagnetic heating, mainly transfers the heat from the bottom of the thinnest V-groove to the rounded part, revives the oil-based adhesive in that part, and bonds the decorative sheet This is because the present invention is configured as described above.

  At this time, at least two surfaces of the strength aggregate 7 coated with the water-based adhesive and the back surface of the wood plate 1 are in contact with each other via the above-mentioned adhesive while pressing the electromagnetic wave to heat the water-based adhesive. At the same time as the dehydration and curing, the power required to raise the temperature of the decorative sheet surface to a temperature range of 60 to 160 ° C. can be applied by this heat generation to soften the adhesive and restore the function of the adhesive. During this time, the local elongation of the decorative sheet corresponding to the groove bottom is corrected by the loosening of the peripheral adhesive.

The rounded portion of the decorative sheet-attached wood member produced according to the present invention is inevitably rich in adhesive, and not only does the fragile wood material remain and fasten the members on both sides of the folding position, but is also reinforced by the adhesive. If an elastic adhesive such as natural rubber latex is applied to the bottom of the surface groove, it can also function as a cushion between the decorative sheet and the wooden flat plate after assembly.
In other words, the form of the product is that the wood assembly member with the decorative sheet-attached wood flat plate folded and pasted over the corner ridges of the strength aggregate is continuous with the wood fibers at the bent part, and the rounded parts on both sides are cut or ground It is almost arc-shaped. In this folding position, an adhesive layer thicker than other positions remains between the decorative sheet and is strong, and it is possible to provide a cushion function.

According to the present invention, it is possible to provide a method for mass-producing a wood sheet member with a decorative sheet with small rounded corners at low cost. In addition, it is possible to provide a method for producing a small-sized corner ridged decorative sheet hollow assembled wooden member that is bent at 1 to 4 locations seamlessly, and a small-shaped corner ridged decorative sheet assembled wooden member that is less likely to damage the corner-shaped portion. .
By constructing as described above, in the process of joining and assembling to the target member, the decorative sheet of that part is stretched and brought into close contact with the arc slope by its elastic force, and the function of the dormant oil-based adhesive is restored and strong It becomes possible to obtain a proper adhesion.

In the method shown in the means 1 for solving the problem,
The cutting machine in the first machining step is a molder for mounting and driving a blade on a plurality of axes. While advancing a plywood slab, the surface is shifted in the direction of travel, and two parallel grooves are formed in one step. Process. The cut cross-sectional shape at this time is the state before applying the decorative sheet 6 in FIG. 2, and T is 2.50 mm, L is 25.0 mm, and the groove bottom remaining thickness t is 0.20 mm. The back surface groove 5 of the flat plate material is not processed. The slope bulge radius R is not limited to a single radius, but is shown as a single radius R of 10.0 mm in FIG. Although these conditions need to be delicately corrected to be the optimum conditions depending on the material and processing conditions, the range described in the means 1 for solving the problem can be changed.
After bending in the subsequent process, the groove bottom shape may be finely corrected by experience so that the rounded central tip that was the groove bottom has a smooth continuous shape, but the initial shape is as shown in the figure The groove bottom is smoothly connected with a small reverse radius so that the complementary angle of the intersection angle of the extended intersection tangent of the slope R near the groove bottom is approximately equal to the bending angle. That is, the sum of the intersection angle and the complementary angle is 180 degrees. Actually, the shape of the rounded central tip which is the groove bottom is slightly disturbed by the bending process, but the shape disorder is corrected by the decorative sheet and the adhesive under it.

  An example in which a scratch crease having a depth of 0.10 mm is processed on the back surface of the wooden flat plate material 1 in accordance with the condition of the first example in accordance with the position of the groove bottom on the surface as shown in FIG. By doing so, the position of the inner surface of the folding is accurately determined, and it becomes easy to adjust the inner and outer shapes of the folding position.

  As shown in FIG. 1, a V-groove with a groove angle of 90 degrees having a depth of 1.00 mm is cut on the back surface of a wood flat plate 1 having a T of 2.50 mm, and then a depth of R is 3.0 mm on the surface 1. An embodiment in which a bulged round slope groove 2 of 30 mm is cut and the remaining thickness t between the groove bottoms is processed to 0.20 mm.

As shown in FIG. 1, a V groove having a groove angle of 90 degrees with a depth of 9.70 mm is cut on the back surface of a wood plate 1 having a T of 15.00 mm, and then the surface is aligned with the groove bottom position on the back surface. An example in which the bulging round slope groove 2 having a tip radius 1.00 mmR of the groove bottom of 3.0 mm and a depth of 1.30 mm is cut to a remaining thickness t between the groove bottoms of 0.20 mm.
In the case of such a thick wooden flat plate, embossing and grooving of decoration can be simultaneously performed on the plate surface.

  In the method shown in the means 1 for solving the problem, the cutting machine is a multi-axis numerical control router, which is fixed to a wooden flat plate 1W fixed table by vacuum suction, and the blade is numerically controlled to perform grooving on one side. What is to be done, the wood plate 1 is turned upside down and aligned, suctioned and fixed under reduced pressure, and the groove bottom position is aligned and grooved. Other steps are in accordance with the techniques described in Examples 1 to 4.

  In the method shown in the means 1 for solving the problem, any of various commercially available decorative sheets for wrapping can be used as the decorative sheet 6 in the decorative sheet sticking step by the wrapping method in the second processing step. Many commercially available products recommended by the manufacturer can be used as the oil-based adhesive to be applied on one side. For example, as an oil-based / oil-soluble adhesive, a polyurethane resin is a main agent, polyisocyanate is a curing agent, and methylene chloride is suitable as a main solvent for both. This is mixed around 20 to 1, and the coating is adjusted with a knife coater to a thickness of 50 to 200 microns.

  Then, the coated surface is pressed and pasted to the surface of the wood flat plate 1 by a roll, but most of the surface grooves 2 of the wood flat plate leave gaps in the state of being stuck due to the groove shape. Even if the decorative sheet of the groove portion is once bonded, it is awaited to be peeled off from the groove portion slope by the tension of the decorative sheet itself. The part of the oil-based adhesive is allowed to dry naturally and is allowed to sleep, and the next third processing step is started within 24 hours. If an adhesive or adhesive is applied to the bottom of the groove immediately after cutting, there is no gap, and in some cases this may rise up from the plate surface, and the decorative sheet is farther from the groove bottom than the plate surface. By doing so, it is possible to prevent local deformation and breakage of the decorative sheet during resuscitation of the adhesive after bending.

In the method shown in the means 1 for solving the problem, in the third assembly step, the decorative sheet-attached wooden flat plate and the strength aggregate 7 are bonded and assembled, and an aqueous adhesive is applied to the planned bonding surface of the strength aggregate 7. To do. As the strength aggregate, a metal material or a polymer material can be used, but a wooden material that is inexpensive and easy to process and has excellent adhesion to the wooden flat plate 2 is the best.
The water-based adhesive may be selected by the manufacturer according to the type of wooden flat plate or strength aggregate. If both are woody, there are a great number of suitable adhesives. For example, the adhesives of various companies having acrylic as the main component and water as the main solvent are good. If necessary, the same adhesive may be replenished to the planned bonding surface of the wooden flat plate.

Then, the decorative sheet-attached wooden flat plate is bent in the direction in which the bulging round groove bottom protrudes, and the corner ridge A of the strength aggregate is brought into contact with both sides of the opposite side of the fold line. Then, these surfaces to be bonded are pressed with electromagnetic wave heating in contact with the water-based adhesive to heat and dehydrate and cure the water-based adhesive, and at the same time, the surface of the decorative sheet is heated to 60 to 160 ° C. by this heat generation. Adhesive assembly is performed while applying the power necessary to raise the temperature.
This assembly method does not require a curing period because of heat and pressure bonding, and can be immediately inspected and shipped.

  In the first processing step, groove processing of the front and back surfaces of the wooden flat plate material is continuously performed by shifting the processing position back and forth with a molder, and at least one of the front surface or the back surface on the same line immediately after the groove processing The example which apply | coats the same kind of adhesive agent as the adhesive agent used by a post process to the groove bottom part of this, and once dries before bending.

In this way, the groove processing of the front and back surfaces of the wooden flat plate material is continuously performed by shifting the processing position back and forth, so that resonance of the mechanical system can be prevented, processing accuracy can be improved, and processing speed can be improved. Become. Further, even when a plurality of grooves are simultaneously machined on the same surface, the tool position can be finely adjusted independently by using different machining axes. Furthermore, even if it is the same groove, it can be machined at high speed and with high accuracy by dividing the machining part or dividing into rough machining and finishing, and machining to reduce the remaining thickness t of the groove bottom to the limit is possible. become.
Then, on the same line immediately after the groove processing, an adhesive that does not impair the adhesive performance of the adhesive used in the post-process is applied to at least one groove bottom portion on the front surface or the back surface, and is dried once before bending. The film can improve the strength of the remaining portion between the groove bottoms, and can prevent breakage during handling or bending.

  Here, application is a general term for attaching an adhesive to an object, and does not select the means, but includes spraying, brushing, injection, and the like. The adhesive that does not hinder the adhesive performance of the adhesive used in the post-process is, for example, the same type of adhesive as the adhesive used in the post-process. The drying rate can be improved by adding volatile components or by blowing hot air, but the heat generated in the grooves of the wooden flat plate remains, so that the drying rate does not cause a problem in normal operations. fast. Further, it is possible to prevent the dust from being caught and adhered mainly by removing the cutting dust in the groove portion mainly by vacuum suction or high-speed air flow blowing immediately before applying the adhesive.

In the techniques described in the means 2 and 4 for solving the problem, as shown in FIG. 6, the bottom surface of the wood plate material is turned down, and the V-groove processing of the lower surface is performed first, and immediately thereafter. On the same line, the upper surface bulge round groove is processed, followed by the finishing process, and then the dust on the upper surface groove is removed by vacuum suction or high-speed air current blowing, and the bottom of this groove is a post-process. An example of a method for producing a wood member with a small rounded corner ridge, wherein the same type of oil-based adhesive as that used in the above is applied by spraying and then dried prior to the subsequent bonding step.
If a water-based adhesive is spray-applied from below to the V-groove on the lower surface, the dust removal step can be omitted.

In the techniques described in the means 2 and 4 for solving the problems, the back surface of the wooden flat plate is turned up, the V-groove processing of the upper surface is performed first, and then the lower surface on the same line immediately after that. After that, the dust in the upper surface V-groove is removed by vacuum suction or high-speed air current blowing, and the same kind of water-based adhesive as that used in the subsequent process is sprayed on the bottom of the groove. An embodiment of a method for producing a wood member with a small rounded corner ridge, which is once dried before a subsequent bonding step.
If an oil-based adhesive is spray-applied from below to the round groove on the lower surface, the dust removal step can be omitted.

  In the technique described in Examples 8 to 10, the bulging round groove processing is divided into whole groove rough cutting, then one-sided surface finishing cutting, then another one-sided surface finishing cutting, and then groove bottom finishing cutting. Example.

  A wood sheet member with a decorative sheet with a small rounded corner ridge manufactured by the technique according to means 1 to 4 for solving the above problems.

In Example 12, it is a wood sheet member with a small rounded corner ridge and produced by applying an elastic adhesive such as natural rubber latex to the bottom of the surface groove.

It is a basic conceptual diagram before bending of the present invention. It is a basic conceptual diagram before bending of the present invention. It is cutting shape explanatory drawing of this invention. It is explanatory drawing after the assembly of this invention. It is an example of an adhesion assembly adhesion process of the present invention. It is a continuous cutting process conceptual diagram of this invention.

Explanation of symbols

1: wood slab,
2: The surface groove of the wooden flat plate,
3: Swelling round groove slope,
4: V-groove slope,
5: Back surface groove of a wooden flat plate,
6: Cosmetic sheet
7: Strength aggregate,
8: Horizontal roll,
9: Vertical roll,
10: Seam of wood flat plate with decorative sheet,
R: bulge radius groove slope radius,
B: groove bottom,
T: Wood plate thickness,
L: V groove inner edge distance,
L ′: strength aggregate thickness,
t: remaining thickness of groove bottom,
d: bulge depth groove depth,
v: V groove depth,
f: thickness of the decorative sheet,
A: Angular ridges of strength aggregate,
F1, F2: Feed roll,
C1-C4: Molder rotary blade,
M: dust removal nozzle,
N: Adhesive application nozzle

Claims (5)

In the method for manufacturing a wooden assembly member in which a decorative sheet-attached wooden flat plate is folded and pasted across the corner ridges of the strength aggregate, the first processing step is to form a straight groove on at least the surface of the wooden flat plate 1 on which the decorative sheet is to be applied. In the cutting or grinding process, the cross-sectional shape of the surface groove 2 of the wood flat plate 1 is engraved in a bulging round groove shape in which the slope 3 is bulged, and this groove One end of the slope is smoothly in contact with the plate surface, the center is the groove bottom B, and the other end is in smooth contact with the plate surface, and the remaining thickness t of the groove bottom is in the extremely thin range of 0.05 to 0.40 mm. It is to do.
The second processing step is a decorative sheet sticking step by a wrapping method, in which an oily / oil-soluble adhesive material / adhesive is applied to one surface of the decorative sheet 6, and the coated surface is covered with a roll by the wooden flat plate material. It is pressed and pasted to the surface of 1, but it is to proceed to the next step after leaving the decorative sheet that has been adhered to the bulging round slope to be lifted from the groove bottom.
The third processing step is a step of assembling so that the decorative sheet-attached wood flat plate is folded at the groove portion and the bending angle is maintained by adhesion to the strength aggregate 7, and the strength aggregate 7 is adjacently bonded. The surface is a complementary angle of the bending angle, and an aqueous / water-soluble adhesive / adhesive is applied to at least one of the adhesion planned surface straddling the corner ridge A or the adhesion planned surface of the wooden flat plate 1. And these pre-bonding surfaces are pressed with electromagnetic wave heating in contact with an aqueous / water-soluble adhesive / adhesive to simultaneously heat and dehydrate and cure the aqueous / water-soluble adhesive / adhesive. Manufacturing of a wooden sheet member with a small rounded corner ridge, which is bonded and assembled while applying electric power necessary to raise the surface of the decorative sheet to a temperature range of 60 to 160 ° C. due to this heat generation Law.   In the manufacturing method of a wooden assembly member that bends and pastes a wooden flat plate with a decorative sheet across the corner edges of a strong aggregate, the first processing step is to cut a straight groove by aligning the groove bottom position on both sides of the wooden flat plate 1 It is a grinding process, and the cross-sectional cutting shape of the surface groove 2 of the wooden flat plate 1 is engraved into a bulging round groove shape in which the slope 3 is bulged, and this groove One end of the slope is in smooth contact with the plate surface, the center is the groove bottom B, and the other end is in smooth contact with the plate surface, and the back surface groove 5 of the wood plate 1 is a V-groove groove of the straight slope 4 2. The small groove according to claim 1, wherein the groove is engraved in a V-groove shape having an angle substantially equal to the bending angle, and the groove bottom remaining thickness t is in an extremely thin range of 0.05 to 0.40 mm. Manufacturing method of wood sheet member with decorative sheet with rounded corner ridge.   After the decorative sheet sticking step by the lapping method, which is the second processing step according to claim 1, a step of engraving the V-shaped groove according to claim 2 on the surface where the decorative sheet is not attached is added. A method for producing a wood member with a decorative sheet with a small rounded corner ridge, characterized in that:   Glue processing of the front and back surfaces of the wooden flat plate is carried out continuously by shifting the processing position back and forth, and the adhesive used in the subsequent process at the bottom of at least one of the front and back surfaces on the same line immediately after the groove processing 4. The method for producing a wood member with a small rounded corner ridge-attached decorative sheet according to claim 1, wherein an adhesive that does not impair the performance is applied and dried once before bending. A wood assembly member that is made by folding and pasting a wood sheet with a decorative sheet across the corner ridges of a strong aggregate has wood fibers continuous at the folded part, and the rounded parts on both sides are almost arc-shaped by cutting or grinding. A wood sheet member with a decorative sheet sheet with small rounded corner ridges, wherein a thicker adhesive layer than that at other positions remains between the decorative sheet and the folding position.

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