JP2563881B2 - Decorative board having bent portion and method for manufacturing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative plate having a thin metal plate joined to its surface and having a bent portion at its end face or front end, and its manufacturing method. More specifically, it relates to a sink, a cooktop, a washbasin or a sink. The present invention relates to a decorative board having a bent portion on an end surface or a front end used for manufacturing a bay window of a kitchen or a bathroom, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, a decorative plate having a bent portion using a thin metal plate as a surface material has one end of the thin metal plate fixed to a base material formed in a predetermined curved shape in advance, and then along the base material. It was also manufactured by a method in which a metal plate was sequentially bent and adhered and fixed to a base material. However, when a base material having a metal thin plate as a surface material is subjected to bending by such a manufacturing method, there is a problem that the bending of the metal thin plate becomes discontinuous and a gap is easily generated between the metal thin plate and the base material. The folded width of the thin metal plate is not constant, and the width of the bent thin metal plate is gradually narrowed, causing a positional deviation at the beginning and end of the thin metal plate, and attaching the end of the thin metal plate to the base material at an angle. There was a problem that it would end up. Furthermore, when the base material and the metal thin plate are bonded with a rubber adhesive, the adhesive layer is likely to be non-uniform, which results in unevenness on the surface of the metal thin plate, forming a clean curved surface. There was a problem that I could not do it.

On the other hand, as a decorative board having a bent portion and a method for manufacturing the same, (1) JP-B-57-55075, (2) JP-A-60-61232, or (3) JP-B-5- It is disclosed by Japanese Patent No. 39162.

[0004] In the publication of the above (1), "a decorative sheet is attached to the surface of a base material, and a main body of a decorative material in which a concave groove is provided in a portion corresponding to a bent portion of the base material, and a plurality of core pieces. And a core material arranged in parallel, wherein the core material is adhesively fixed in the concave groove of the decorative material, and the decorative material is bent so that the side surfaces of the core pieces are in contact with each other. ing,

However, according to this prior art, when forming a bent portion in a decorative material, first, a core material having a plurality of rectangular parallelepiped core pieces arranged in parallel in a concave groove formed by cutting out the decorative material is provided. Had to be fixed, which made the work complicated.

In addition, when a decorative material having a thin stainless steel plate as a surface material is bent by this method, the decorative material can only flex smoothly until the side surfaces of the core pieces contact each other. . Therefore, by forcibly bending the shape of the bending portion formed on the decorative material to a semicircular cross section,
Since the bending of the thin metal plate becomes discontinuous, a gap is created between the thin metal plate and the curved surface, and distortion or unevenness occurs on the curved surface. Therefore, it is necessary to produce the decorative material having a bent portion with a good surface finish. There was a problem that I could not do it.

In the publication of the above (2), "a curved surface bending method of a synthetic resin decorative plywood obtained by adhesively laminating a synthetic resin decorative sheet or a synthetic resin decorative film on the surface of a substrate, A thin layer is appropriately left on the substrate front side, and a plurality of deep groove lines parallel to the bending direction are intermittently cut at a constant interval on the back side of the substrate continuously with at least this residual layer on the substrate front side, A curved surface bending method for a synthetic resin decorative plywood is disclosed, which is characterized in that "the part is subjected to heat treatment from the outside as necessary and is bent."

According to this method, since a surface material having a relatively small thickness such as a synthetic resin sheet or a synthetic resin film is laminated, there is a drawback that heat resistance and durability are poor. Moreover, when the substrate is plywood or particle board, when a plurality of deep groove lines are formed in the residual layer provided on the back surface of the curved surface, the strength of the comb teeth of the comb-like notch remaining in the residual layer is increased. Since it is small, it has a drawback that it is liable to be chipped, and defective cutting is likely to occur. Therefore, for a decorative material having a stainless steel thin plate joined to the surface, even if bending is performed by this method, for the same reason as described in the prior art described in the above (1) publication, the metal thin plate However, there is a problem that the surface is deformed or uneven, and thus it is not possible to manufacture a decorative material having a clean bent portion.

The above-mentioned publication (3) discloses that "a medium specific gravity fiberboard having a thermosetting resin as a binder is used as a base material, and the surface of the base material is attached using an adhesive of the thermosetting resin. The decorative material thus formed is provided with a comb-shaped notch formed in parallel with a large number of concave grooves on the back surface at a predetermined position, and the surface corresponding to the notch is bent while being heated. There is disclosed a decorative material having a bent portion having a characteristic.

According to this method, a thermosetting resin decorative plate such as a melamine resin decorative plate or a diallyl phthalate resin decorative plate is heat-cured on the surface of a base material prepared using a thermosetting resin as a binder. It is attached with a heat-resistant adhesive that is a heat-resistant resin. Then, a comb-shaped notch formed by arranging a large number of concave grooves in parallel is provided on the back surface of the decorative material thus formed, and the surface corresponding to this notch is bent while being heated. Therefore, the comb-shaped notches provided on the back surface of the bent portion are joined by the outflow resin melted from the thermosetting resin adhesive, so that the base material of the bent portion becomes strong and durability and heat resistance are improved. Property is provided, and at the same time cost can be reduced. However, in this method, even if the decorative material with the thin metal plate bonded to the surface is bent while being heated, the bending of the thin metal plate becomes discontinuous and a gap is created between the thin metal plate and the curved surface. There is a problem in that the decorative material having a bent portion with a good surface finish cannot be produced because of distortion and unevenness.

Recently, the applicant has filed an earlier application (Japanese Patent Application No. 4-1
In the invention relating to No. 25610), regarding “a decorative material having a bent portion having a semi-circular cross section with a clean finished surface” which cannot be manufactured by the above-mentioned prior art, “a surface material and a surface material are joined Formed by a bent base material and a corner member arranged at the bent portion, the counter member having curved surface corner portions and a manufacturing method thereof. Was disclosed.

According to this method, since the bar-shaped corner member having a semicircular cross section is attached to one side wall of the concave groove formed by cutting out a wood plate such as plywood, the surface material and the corner member are bent in the step of bending the base material. Moreover, it is difficult to form a gap between the base material and the corner member, so that it is possible to provide a decorative material having a bent portion with a clean surface finish and a method for producing the same. However, since a rod-shaped corner member having a semicircular cross section must be attached to one side wall of the concave groove, there is a problem that the work for that is slightly complicated.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to provide a decorative material composed of a medium-quality fiberboard and a metal thin plate bonded to the surface thereof. Another object of the present invention is to provide a decorative plate having a bent portion with a semicircular cross section that ensures a clean surface finish, and a method for manufacturing the same.

[0014]

[Means and Actions for Solving the Problem] That is, as means for solving the above-mentioned problems, in the invention according to claim 1, "a medium-quality fiberboard and a metal thin plate bonded to the surface thereof are used. A decorative material having a thin portion provided at a position corresponding to a bent portion of a medium-quality fiber board, and a V-shaped cutout portion provided in the thin portion, corresponding to the thin portion. processed followed bent together with the sheet metal to be
The decorative plate is characterized by "having a bent portion formed by fixing pins ".

In the invention according to claim 2, "1. step of joining the medium-quality fiberboard and the metal thin plate; 2. bending of the medium-quality fiberboard on the side opposite to the side on which the metal thin plate is bonded A step of forming a thin wall portion at a position corresponding to a portion; 3. a step of cutting a large number of V-shaped notches in the thin wall portion of the medium quality fiber board; The method of manufacturing a decorative sheet having a bending portion characterized by the feature of " a step of bending together with a thin metal plate corresponding to 5."; a step of fixing the bent state with a pin ;

[0016]

The present invention will be described more specifically and in detail below. The method for manufacturing a decorative board according to the present invention has steps as shown in FIGS. First, as shown in FIG. 1, a medium-quality fiberboard 11 and a thin metal plate 21 cut into a predetermined length are joined together to produce a decorative material. The adhesive used for joining is appropriately selected from thermosetting resin agents, thermoplastic resin adhesives, and adhesives such as composite adhesives thereof. For example, when joining a stainless steel thin plate and a medium quality fiberboard, a stainless steel thin plate is placed on the surface of the medium quality fiberboard coated with an adhesive containing a silicone modified polymer as a main component or an epoxy resin adhesive. It is done by placing and pasting. At the time of joining, one end of the medium quality fiberboard is temporarily fixed by several pins 31 by a pin tacker or the like so that the displacement does not occur until the medium quality fiberboard 11 and the metal thin plate 21 are completely bonded. It is preferable.

Medium fiberboard 1 used as a substrate in the present invention
1 was formed into a plate shape by pressing a wood fiber obtained by disintegrating small pieces of wood into fine pieces like cotton with a thermosetting resin agent such as an epoxy resin, a phenol resin, a urea resin or a melamine resin as a binder. Therefore, its strength and machinability of woodwork are extremely excellent. Therefore, the fiber board can be easily shaved off, and the V-shaped notch 15 described later can be easily shaved.

Further, the flat surface of the fiber board is excellent in smoothness, and even if the thin metal plate 21 is joined, no unevenness occurs, and in particular, the surface of the bent decorative material does not have unevenness. It is an excellent decorative material for surely manufacturing a decorative plate having a bent portion 14 having a beautiful surface finish.

Furthermore, since the medium-quality fiberboard is toughly molded with the defibrated wood fibers entwined with each other as described above, for example, the thin-walled portion 1 of the medium-quality fiberboard described below is used.
The strength is maintained so that the residual portion 13 of the sawtooth-shaped fiber board formed by cutting into No. 2 does not drop out. Further, the bending portion 14 formed on the decorative material retains a remarkable tenacity and strength capable of sufficiently withstanding an impact force.

Next, as shown in FIG. 2, at a position corresponding to the bent portion on the side opposite to the side where the thin metal plate 21 is joined,
The thin portion 12 of the medium fiber board 11 is formed. The thin portion 12 has a width corresponding to the length of the bent portion 14 of the decorative plate to be manufactured, and is formed by scraping off a medium-quality fiberboard using a cutting machine or the like. When the shape of the bent portion 14 of the decorative plate to be manufactured is semi-elliptical, V provided at the position corresponding to the bent portion on the side opposite to the side to which the thin metal plate 21 is joined.
It is necessary that the character-shaped notches 15 be formed at predetermined intervals. In addition, when the shape of the bent portion 14 of the decorative board to be manufactured has a semicircular cross section, the thin portion 12 of the medium fiber board 11 is formed.
Is preferably formed to have a thickness of about ½ of the thickness of the fiberboard.

For example, if the thickness of the thin portion 12 of the medium quality fiberboard 11 is too thin, the V-shaped notch 15 described in detail below cannot be formed in the thin portion 12, or the same. It becomes difficult to form the V-shaped notch 15 having a size. Further, if a forcible bending process is applied to these, the bending of the metal thin plate 21 becomes discontinuous, and it becomes impossible to form a clean bending process part.

If the thin portion 12 of the medium quality fiberboard 11 is too thick, it becomes difficult to form the V-shaped notch 15 having a sufficient depth in the thin portion 12 cleanly. Further, when these materials are subjected to a forcible bending process, the bending of the thin metal plate 21 becomes discontinuous, and a gap is formed between the thin metal plate 21 and the base material. As a result, distortion or unevenness occurs on the curved surface, so that it is not possible to manufacture the decorative material having a bent portion with a good surface finish.

Then, as shown in FIG. 3, the thin-walled portion 12 of the medium-quality fiberboard 11 formed at a position corresponding to the bent portion.
Then, a plurality of V-shaped notches 15 parallel to the bending direction are cut. The shape and size of the V-shaped notch 15 are calculated in advance so as to correspond to the shape of the bent portion 14, and are cut at a predetermined position of the thin portion 12. However, the number is not particularly limited. For example, as shown in FIG.
The fiber board 1 having a width corresponding to the length of the bent portion
By cutting the V-shaped notches 15 of the same shape in parallel with the bending direction in the thin portion 12 of 1 at equal intervals, the bent portions 14 of the decorative plate can be finished to have a semicircular cross-section. Also,
The larger the number, the more round the semi-circular cross section can be finished.

Next, as shown in FIG. 4, the remaining portion 13 of the fiberboard 11 formed in the thin portion 12 of the medium quality fiberboard 11 provided at the position corresponding to the bent portion is the metal thin plate 21.
They are bent together and then the decorative materials are joined together. The decorative materials are joined together by an adhesive or other joining means. A moisture-proof sheet of vinyl chloride or the like may be attached to the surface of the middle-chamber fibrous board, which is a cosmetic agent, to prevent moisture absorption. In the commercialized state, a small cap or the like is attached to the end of the decorative plate.

[0026]

EXAMPLES Next, examples of the present invention will be described. In Example 1, a medium-quality fiberboard 11 having a thickness of 9 mm is used as a base material, a commercially available epoxy resin adhesive is applied to the surface of the base material, and a stainless thin plate 31 having a thickness of 0.3 mm is used as a base material. Adhere and pin one end of the stainless steel thin plate 31 to 24
After standing for a period of time, the adhesive was cured and a stainless steel thin plate was bonded to the surface of the base material to prepare a decorative material.

Next, the above decorative material was cut using a cutting machine to form a thin portion 12 of a medium quality fiberboard having a thickness of 0.4 mm and a width of about 2.9 mm on the back surface of the above decorative material. Then, FIG.
As shown in FIG. 8, the thin-walled portion 12 has eight V-shaped notches 15
After shaving using a cutting machine, using a bending machine,
The decorative material on the short side wall side of the thin portion 12 was bent, and the decorative material was joined together by fixing the stainless thin plate 11 together with the pin 31 from the bent decorative material side. As a result, a decorative plate having a bent portion 14 having a semicircular cross section was produced, but the finished surface of the bent portion 14 had no irregularities, and a decorative plate having a clean curved surface could be produced.

On the other hand, in Comparative Example 1, as in Example 1,
A decorative material was produced by bonding a stainless thin plate to the surface of the base material with an adhesive. Then, after forming a thin portion having a thickness of 1 mm on the back surface of the decorative material using a cutting machine, eight V-shaped notches were cut in the thin portion using a cutting machine.
The V-shaped notch could not be formed neatly. Then, as in Example 1, the decorative material on the short side wall side was bent using a bending machine, and the decorative material side was pinned together with the stainless steel thin plate from the bent decorative material side to join the decorative materials together. Unevenness was found on the curved surface of the decorative plate thus manufactured, and it was not possible to manufacture a decorative plate having a clean curved surface.

In Comparative Example 2, as in Example 1, a stainless steel thin plate was bonded to the surface of the base material with an adhesive to prepare a decorative material. Then, as in Example 1, a V-shaped cutout was cut out on the back surface of the decorative material using a cutting machine, but the cutout reaching the deep portion of the base material could not be provided unusually. Then, as in Example 1, the decorative material on the short side wall side was bent using a bending machine, and the decorative material side was pinned together with the stainless steel thin plate from the bent decorative material side to join the decorative materials together. However, unevenness was recognized on the surface of the bent portion, and it was not possible to produce a decorative plate having a clean curved surface.

[0030]

As described above in detail, since the medium-quality fiberboard 11 is manufactured as described above, the fibers constituting the fiberboard are oriented in a random direction with the entangled wood fibers. Therefore, there is no anisotropy of various physical properties such as strength and dimensional change rate of the fiber board, and is characterized by having isotropic physical properties and being homogeneous and having a fine grain surface. Therefore, it has excellent woodworking machinability in which a large number of notches can be cut on the back surface of the bent portion, and excellent smoothness in which unevenness does not occur on the flat surface even when joining thin metal plates. It can be used as a base material having.

According to the first aspect of the present invention, unlike a conventional decorative board manufactured by bending and adhering a thin metal plate along a corner of a base material previously formed into a curved surface shape, the "intermediate fiber A decorative plate comprising a plate and a thin metal plate bonded to the surface thereof, the thin portion being provided at a position corresponding to a bent portion of a medium quality fiberboard, and a V-shaped notch provided in the thin portion. The decorative material including and is bent together with the metal thin plate corresponding to the thin portion, and then has a bent portion formed by fixing with a pin . " By providing the thin portion on the back surface of the medium quality fiberboard, the V-shaped notch having an appropriate depth can be provided neatly. Further, the sawtooth-shaped remaining portions remaining in the V-shaped notches can be flexed smoothly to the point where their end surfaces are in contact with each other. Therefore, there is no gap between the thin metal plate 21 and the medium-quality fiberboard 11, so that the decorative plate has a semi-circular bent portion with a clean surface finish.

According to the second aspect of the present invention, since the metal thin plate is bonded to the medium quality fiberboard 11 in advance, it is possible to cure the adhesive for bonding the medium quality fiberboard 11 and the metal thin plate 21 when the metal thin plate is bent. You don't have to wait. In the conventional method of bonding and fixing the metal thin plate 21 to the base material while sequentially bending the metal base material 21 along the curved base material, it is necessary to wait for the adhesive to cure in the bent state. In this case, in order to prevent the thin metal plate from returning and peeling from the base material in the bending part, a device, a jig, etc. for fixing the thin metal plate to the base material are required until the adhesive is cured. costly. Conventionally,
Rubber-based adhesives have been used to shorten the bonding time, but in this case, the adhesive layer becomes non-uniform, and the thin metal plate has irregularities, which can form a clean bent portion. Can not. Since the present invention does not require a device, a jig, or the like for fixing the metal thin plate 21 to the base material when the metal thin plate 21 is bent, the decorative plate can be manufactured at a lower cost, and the surface can be reliably secured. This is a method capable of manufacturing a decorative board having a bent portion having a semicircular cross section with a clean finish.

[0033]

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing one step of a manufacturing method according to the present invention.

FIG. 2 is a schematic cross-sectional view showing one step of the manufacturing method according to the present invention.

FIG. 3 is a schematic cross-sectional view showing one step of the manufacturing method according to the present invention.

FIG. 4 is a schematic cross-sectional view showing one step of the manufacturing method according to the present invention.

[Explanation of symbols]

 11 Medium-quality fiberboard 12 Thin part 13 Remaining part 14 Bending part 15 V-shaped notch 21 Metal thin plate 31 Pin

Claims (2)

(57) [Claims] 1. A decorative plate comprising a medium-quality fiberboard and a metal thin plate bonded to the surface thereof, the thin-walled portion being provided at a position corresponding to a bent portion of the medium-quality fiberboard, and the thin-walled portion. A decorative material having a V-shaped notch provided in the above is bent together with the metal thin plate corresponding to the thin portion, and then fixed with a pin.
Veneer with the bent portion formed by a constant. 2. 1. The step of joining the medium fiberboard and the thin metal plate; 2. A step of forming a thin portion at a position corresponding to a bent portion on the side opposite to the side where the metal thin plates of the medium quality fiberboard are joined; 3. Machining a large number of V-shaped notches in the thin portion of the medium fiber board; 4. Bending the medium fiber board together with a metal thin plate corresponding to the thin portion; A step of fixing the bent state with a pin ; and a method of manufacturing a decorative board having a bending portion.