JP4315937B2 - Transparent sheet for decoration - Google Patents

Description

  The present invention relates to a decorative transparent sheet, and more specifically, a transparent soft synthetic resin sheet placed on an upper surface of a table, a desk, or the like. The decorative portion formed on the transparent sheet is incident light. The decoration effect is enhanced.

2. Description of the Related Art Conventionally, many synthetic resin sheets for laying on the upper surface of this type of desk / table or the like have been directly printed with a pattern or pattern on the surface.
In addition, in registered utility model No. 3033132 (Patent Document 1), in order to prevent a hand or an object from being caught or moved around the periphery of the sheet and moved, or to prevent an object placed on the sheet from falling or falling, FIG. As shown in FIG. 2, a sheet in which an upward slope Sa is formed on the entire peripheral side surface of the sheet S so as to be inclined inward from the lower surface to the upper surface is proposed.

Registered Utility Model No. 3033132

However, when the peripheral end surface (edge) is a vertical surface, the sheet of Patent Document 1 has a single slope upward on the entire peripheral end surface because a hand or an object is easily caught at the upper end angle of the edge. It is only what is cut in this way, and is not intended for a decorative effect.
In addition, if the tapered surface is formed from the lower end to the upper end of the entire peripheral end surface, the strength decreases due to thinning to the lower end portion of the peripheral end surface of the sheet, or damage or air temperature just by contacting something with the peripheral end surface of the sheet. Deformation due to (temperature) occurs, and defects such as rippling of the peripheral edge occur due to aging hardening or the like.

  For decoration purposes, a pattern or pattern printed directly on the surface of a sheet has a flat decoration effect, but a three-dimensional decoration effect cannot be expected. It is inevitable that the decorative effect gradually deteriorates.

  This invention is made | formed in view of the said problem, and makes it a subject to provide the transparent sheet for decoration which can make a three-dimensional decoration effect exhibit stably over a long period of time using natural light etc. effectively.

In order to solve the above problems, the present invention is provided with a tapered surface inclined inward toward the surface side of the sheet body on the peripheral end surface of the transparent synthetic resin sheet body,
On the back surface of the sheet body, a decorative portion made of a figure, a symbol, a letter, or a combination thereof is formed by a cut V-groove,
The V-groove has inclined surfaces on both sides thereof extending at a constant angle, and an asymmetric V-groove in which the angle of the inclined surfaces on both sides is changed, a symmetric V-groove having the same angle, or an asymmetric V-groove Any combination of symmetric V-grooves ,
Configuration in which incident light that enters the thick portion of the sheet main body from the tapered surface of the peripheral end surface of the sheet main body is diffusely reflected on the surface side of the sheet main body at the boundary of the inclined surface of the V-groove to give the decoration portion a three-dimensional effect A decorative transparent sheet characterized in that the peripheral end surface of a transparent synthetic resin sheet body is provided with a tapered surface inclined inward toward the surface side of the sheet body,
On the back surface of the sheet body, a decorative portion made of a figure, a symbol, a letter, or a combination thereof is formed by a cut V-groove,
The V-groove is asymmetric, symmetric, or a combination of asymmetric and symmetric by changing the angle of the inclined surfaces on both sides thereof ,
Configuration in which incident light that enters the thick portion of the sheet main body from the tapered surface of the peripheral end surface of the sheet main body is diffusely reflected on the surface side of the sheet main body at the boundary of the inclined surface of the V-groove to give the decoration portion a three-dimensional effect A decorative transparent sheet characterized by the above is provided.

  According to the decorative transparent sheet having the above configuration, since the tapered surface is provided on the peripheral end surface of the transparent sheet main body, the light incident on the tapered surface is reflected on both the front and back surfaces of the sheet main body within the thick portion of the sheet main body. However, it can proceed to the decoration part and diffusely reflect to the surface side of the sheet main body at the boundary surface formed by the inclined bottom surface of the V groove in the decoration part. The decorative portion formed on the back surface of the sheet main body is raised on the front surface side of the sheet main body by a synergistic effect of the irregular reflection light and the irregular reflection light that is directly incident from the surface of the sheet main body and diffusely reflected on the boundary surface of the V-groove. It is possible to visually recognize a decorative effect having a three-dimensional effect for the sheet user.

The transparent sheet main body of the present invention is a flexible sheet molded from acrylic, polypropylene, vinyl chloride, polycarbonate, or the like, and can be placed in close contact with a desk or the like. The thickness of the sheet main body is 1 mm to 3 mm, preferably about 2 mm.
The sheet body may be colored and transparent as long as it is transparent, and may be partially or entirely colored and transparent.

The transparent sheet of the present invention is made of a soft resin sheet as described above, and the V groove of the decorative part is cut by an end mill or a drill, and the angle of the inclined surfaces on both sides of the V groove with respect to the perpendicular from the back surface of the sheet body. Has been changed to be asymmetric.
Cutting to form V-grooves may be hand-carved, but cutting with a drill or end mill can reduce machining costs and improve machining accuracy, and change the angle of inclination on both sides of the V-groove. It can be asymmetric.

More specifically, the V-groove is cut by inclining the blade tip composed of two or four blades of an end mill or drill toward the center and rotating the blade tip. At that time, in the case of positive feed in which the direction of the peripheral speed of the blade edge and the direction of the table traveling speed are opposite directions, the cutting edge is in a counter cutting state where the blade edge faces the soft material of the transparent sheet body. It has become. Therefore, the cutting efficiency can be improved regardless of the cutting resistance by appropriately setting the peripheral speed and the table traveling speed. On the other hand, in the minus feed in which the direction of the peripheral speed of the blade edge coincides with the direction of the table traveling speed, the soft material of the transparent sheet body flows, and this fluidity causes a phenomenon that the soft material escapes from the blade edge. In other words, at the minus feed position, the structure of the soft material of the transparent sheet body flows and swells due to its fluidity, and the swelled part may be cut depending on the table traveling speed, but the soft material is pushed up and fixed position In addition, since the frictional resistance due to the raised portion is added as a cutting resistance, the cutting efficiency is deteriorated as compared with the case of the positive feed in which the rising phenomenon does not occur. As a result, the inclination angles of the two inclined surfaces with respect to the perpendicular of the center of the V groove are different, and the surface roughness of the two inclined surfaces is different.
In this way, the inclination angle of the V-groove is different and asymmetric, thereby making a difference in the amount of irregularly reflected light, and producing a deviation in the surface roughness of the inclined surfaces on both sides generated by plus feed minus minus feed. Light and shade can be imparted to the portion, thereby further improving the decorative effect.
In addition, by changing the inclination angle of the end mill or the cutting edge of the drill, the width of the V-groove can be changed to provide a thick linear groove or a thin linear groove. Can do. Of course, V-grooves whose both inclined surfaces are symmetrical may be used, and the selection thereof is free.

In the peripheral end surface of the sheet main body, it is preferable that the taper surface is formed at the upper portion on the front surface side and a vertical surface is formed at the lower portion on the back surface side.
As described above, the entire surface of the peripheral edge of the sheet body is not a tapered surface, but the lower part is made thick as a vertical surface, so that the strength of the peripheral edge surface of the sheet body is sufficiently maintained and the light reflection phenomenon is utilized. The decorated effect can be maintained stably. As shown in FIG. 6, the shape of the upper tapered surface may be formed on a linear inclined surface 7 that is inclined inward as it goes upward, and is curved outward as shown in FIG. 7 (A). You may form in the circular arc surface 7a to do. Further, as described above, the lower portion of the peripheral end surface is preferably formed on the vertical surface 8 as shown in FIG. 6, but as shown in FIG. 7B, the lower portion of the peripheral end surface is formed on the upper circular arc surface 7a. The entire arc surface 7b may be a circular arc surface 7b.
In detail, as in the conventional mat of Patent Document 1, when the entire peripheral end surface is formed on an upwardly tapered surface that is inclined inwardly upward, as described above, the peripheral end surface becomes low in strength and breakage occurs. The shape holding force is reduced due to the fact that the peripheral end surface is wavy due to temperature (temperature), time-dependent curing, and the like. As a result, when the peripheral end surface is used as the incident surface as in the present invention, the incident light intensity and the incident light amount are not stable, and the desired decoration effect by the irregularly reflected light due to the incident light from the tapered surface is deteriorated. However, according to the present invention, such deterioration of the decoration effect can be suppressed.

Preferably, the decorative portion is formed in the vicinity of the peripheral end surface of the sheet main body, and the tapered surface and the vertical surface are continuously formed over the entire periphery of the peripheral end surface of the sheet main body.
When the decorative portion is provided in the vicinity of the peripheral end surface of the sheet main body as described above, the number of times the incident light is reflected on both the front and back surfaces of the sheet can be reduced. As a result, the attenuation of light intensity is reduced, It is possible to secure a large amount of diffusely reflected light at the boundary surface, and to fully exhibit the decoration effect.
And, if the taper surface is continuously formed over the entire circumference of the peripheral edge surface of the sheet body, the predetermined decoration effect using the light reflection phenomenon can be sufficiently exhibited no matter where the decoration part is formed on the sheet body, The degree of freedom can be increased.

The taper surface of the peripheral end surface of the sheet main body is preferably set to have an inclination angle of 35 to 55 degrees with respect to the sheet back surface.
The reason why the range is less than 35 degrees to 55 degrees is that this angle range can take a large amount of incident light, and the embossing of the decorative portion can be made clearer to further enhance the three-dimensional decoration effect.

Further, the decorative portion provided on the sheet main body is provided with a line-shaped cutting portion that is shallower and narrower than the V-groove, and has an apparent surface cutting portion, and the V-groove is a thick linear groove. May be combined.
The thin linear groove may be formed by a grindstone or the like, or may be formed by a drill or an end mill in the same manner as the V groove.
In this way, by forming the decorative portion in combination with the contour line formed of the thick V-groove and the shallow planar groove, it is possible to obtain a more precise and advanced decorative portion.
In addition, by attaching a color film on one side of the transparent sheet main body, or applying a transparent acrylic paint, or the like, a photograph or an image is placed on one side of the transparent sheet main body, and if these are dug, a cut-out shape Can reproduce the artistic decoration of a pen-like painting, increasing the degree of freedom of design.

As is clear from the above description, according to the present invention, light is efficiently incident from the tapered surface provided on the peripheral end surface of the transparent synthetic resin sheet body, and the incident light is formed on the back surface side of the sheet body. The decorative part can be clearly raised on the surface side of the sheet body by using the irregular reflection when reaching the V groove of the decorated part, and a three-dimensional decoration effect can be visually produced. .
In addition, since the decorative portion made of the V-groove is provided on the back surface side and opened downward in the V-groove, dust does not collect inside the V-groove, and the depth of the V-groove There is no obstacle such as a dent in the work on the seat.

  In addition, by devising the shape of the taper surface of the peripheral end surface of the sheet body as a linear slope or an arc slope, the amount of incident light does not vary, and the amount of reflected light that reaches the boundary surface with the V-groove changes with the incident angle Therefore, the amount of incident light can be kept uniform, and the intensity of irregularly reflected light can be made uniform, for example, and the pattern relief effect can be maintained for a long time.

  Further, the sheet body is made of a soft resin sheet, and the V-groove is cut and provided by an end mill or a drill, so that the inclination angle of the left and right inclined surfaces of the V-groove can be automatically changed, and an asymmetric V-groove is obtained. be able to. By using an asymmetric V-groove in this way, the amount of diffuse reflection on both side surfaces of the V-groove can be made different, and the decorative portion can be embossed while giving a clear shadow, thereby providing a three-dimensional decorative portion. Of course, when the angle of the V-groove is the same on both the left and right inclined surfaces, there is no hindrance to the decorative shape, and a combination with an asymmetric V-groove can be set as appropriate.

Hereinafter, embodiments of a decorative transparent sheet according to the present invention will be described with reference to the drawings.
FIG. 1A is a plan view of the entire sheet 1 of the present invention, FIG. 1B is a front view, and FIGS. 2A, 2B, and 2C are enlarged longitudinal sectional views of main parts.
The sheet 1 according to the embodiment is placed on the upper surface of a table or desk, and is made of a soft transparent sheet made of synthetic resin having a rectangular shape in plan view.

  The transparent sheet main body 2 has the entire periphery of the peripheral end surface 5 as a tapered surface 7 that is inclined inward as it goes upward in the upper half of the surface 2 a side, and the lower portion of the tapered surface 7 is a vertical side surface 8. . The taper surface 7 is set to an inclination angle θ1 in the range of 35 to 55 degrees with respect to the vertical side surface 8 of the transparent sheet body 2 and is set to 45 degrees in the present embodiment.

  The transparent sheet body 2 made of synthetic resin is a transparent soft sheet made of vinyl chloride in this embodiment, and has a thickness of about 2 mm.

On the back surface 2b of the transparent sheet body 2, decorative portions 9 made of figures, symbols, characters, or a combination thereof are formed at the four corners by V grooves 4 cut from the back surface 2b. In this embodiment, the decorative part 9 of the dog figure and the decorative part 9 of the flower figure are formed in a positional relationship in the diagonal direction.
In addition, although the decoration part 9 is formed in four corners of a rectangular sheet, a formation position is not specified, for example, it may be a line figure etc. along the peripheral end face 5, and a logo mark etc. may be sufficient as it.

  The V-groove 4 forming the decorative portion 9 is cut by a known automatic grooving technique using an NC machine using a drill or end mill for micromachining, a teaching playing back system, or the like.

  In this embodiment, the V-groove 4 is formed by cutting the transparent sheet body 2 made of a soft sheet using the drill 20 shown in FIG. The drill 20 includes a plurality of opposed cutting edges 21 and 22, the cutting edges 21 and 22 are inclined toward a center at a required angle, and the tips of the cutting edges 21 and 22 protruding in an acute angle form a continuous portion 23. Grooves can be cut. The inclined surfaces between the cutting edges 21 and 22 release the cutting powder as flank surfaces 24 and 25.

The end mill 20 is arranged in a direction perpendicular to the back surface of the soft transparent sheet body 1 and is rotated in the clockwise direction X as shown in FIG. 4A by a motor (not shown). In cutting the V-groove, in this embodiment, the transparent sheet body 1 is placed on a table (not shown) and the table is moved in a state where the end mill 20 is fixed. As shown in FIG.
4 (A) and 4 (B), the cutting edges 21 and 22 are transparent in the case of plus feed in which the direction of the peripheral speed of the cutting edges 21 and 22 and the direction of the table traveling speed are opposite in the cutting process. The sheet body 2 is in an opposing cutting (counter flow) state toward the soft material. Therefore, the cutting efficiency can be improved regardless of the cutting resistance by appropriately setting the peripheral speed and the table traveling speed. S in FIG. 4 (A) indicates the position of the plus feed of the soft material. On the other hand, in the minus feed in which the direction of the peripheral speed of the cutting edges 21 and 22 and the direction of the table traveling speed coincide with each other, the soft material of the transparent sheet body 2 flows, and this fluidity causes the soft material to move from the cutting edges 21 and 22. The phenomenon of running away occurs. P in FIG. 4 (A) indicates the position of minus feed of the soft material. That is, at the minus feed position, the structure of the soft material of the transparent sheet body 2 flows and swells due to the fluidity, and the swelled part may be cut depending on the table traveling speed, but the soft material is pushed up and fixed. Since the frictional resistance due to the bulging portion is added as a cutting resistance, the cutting efficiency is deteriorated as compared with the case of positive feed in which the bulging phenomenon does not occur. As a result, the inclination angle θ2 of the inclined surface 4a on the left side in the drawing is increased with respect to the central perpendicular L of the V-groove 4 to be cut, and the inclination angle θ3 of the inclined surface 4b on the right side in the drawing is reduced (θ2> θ3). ) And a difference in surface roughness between the inclined surface 4a and the inclined surface 4b.
Thus, the left and right inclination angles of the V-groove 4 formed by the end mill 20 are different, and the asymmetric V-groove 4 is obtained.

The V-groove 4 cut by the drill 20 is a continuous and relatively thick linear groove, and forms a contour line of the figure of the decorative portion 9. As shown in an enlarged view in FIG. 2 (C), the black portion of the decorative portion 9 forms a contour line with the thick V-shaped groove 4, and the inside surrounded by the contour line is a diamond bar or carbide bar. A linear groove 11 that is shallower and narrower than the V-groove 4 is densely formed by using a grinding wheel with a shaft as described above to form an apparent planar cutting portion 12.
In addition, the graphic part 14 formed only from the planar cutting part 12 which consists of the said thin linear groove | channel 11 without providing the contour line which consists of the V groove | channel 4 is also provided. Also, if a color film is attached to one side of the transparent sheet body 2 or a transparent acrylic paint is applied, a photograph or an image is placed on one side of the transparent sheet body 2 and these are cut by line digging. An artistic sheet 1 in the form of a picture or a pen-like picture can be created.

As shown in FIG. 5, the transparent sheet 1 of the present embodiment is used by being laid on the top surface of a table top plate 10. In this usage mode, the light R1 from the sheet surface 2a and the light R2 from the tapered surface 7 of the peripheral end surface 5 are incident on the soft transparent sheet body 2.
As shown in FIG. 6, the light R2 incident from the tapered surface 7 is reflected to the front surface 2a side by the back surface 2b in the thick portion 2c of the sheet body 2, and is reflected to the back surface 2b by the front surface 2a. The reflected light R3 that travels repeatedly is reflected as irregularly reflected light R4 on the surface 2a side of the sheet body 2 at the boundary surface formed by the inclined surface 4a of the V-groove 4. Further, a part of the light is transmitted while being refracted in the V-groove 4, reaches the other inclined surface 4b, and is reflected as irregularly reflected light R5. Therefore, the amount of reflected light between the left and right inclined surfaces 4a and 4b of the V groove 4 is slightly different.
Further, the light is incident from the surface 2a of the sheet body 2, and is reflected as irregularly reflected light R6 on the surface 2a side of the sheet body 2 at the boundary surface formed by the inclined surfaces 4a, 4b and the apex 4c of the V-groove.
By these three types of irregularly reflected light R4, R5, R6, the decorative portion 9 formed on the back surface 2b of the sheet body 2 is raised on the surface 2a side of the sheet body 2, and is recognized as a three-dimensional decoration from the surface 2a. It will be.

  In particular, since the decorative portion 9 is provided at the four corners in the vicinity of the peripheral end surface 5 of the soft transparent sheet main body 2, the number of reflections of the light R2 incident from the tapered surface 7 is reduced to reduce the attenuation of light intensity. In addition, it is possible to secure a large amount of irregularly reflected light at the boundary surface formed by the inclined surface 4a of the V-groove 4 and to sufficiently exhibit the decoration effect.

  In addition, since the inclined surfaces 4a and 4b on both the left and right sides of the V-groove 4 serving as the boundary surface of the light are cut by cutting the asymmetric V-shaped groove 4, the irregular reflection from one inclined surface 4a. A difference is generated between the light amount of the light R4 and the light amount of the irregularly reflected light R5 from the other inclined surface 4b, and the decoration portion 9 can be given light and shade due to the difference in the amount of irregularly reflected light. Can be improved.

In addition, although the said embodiment demonstrated as a sheet | seat for tables which consists of the synthetic resin soft transparent sheet 1 of planar view rectangular shape, what kind of planar shape may be sufficient as it.
Moreover, it is not limited to the table | surface sheet | seat, For example, it is set as the sheet | seat for wall hangings, and may be attached to a perpendicular direction on both sides of a transparent board.
Further, the shape is not limited to a rectangular shape, and may be an appropriate shape such as a circle.
In addition, although the transparent sheet 1 makes the upper half part of the peripheral end surface 5 the taper surface 7, and has provided the perpendicular | vertical side surface 8 in the lower part, even if the whole upper and lower sides of the peripheral end surface 5 are formed in the taper surface, Good.

The whole sheet | seat which concerns on this invention is shown, (A) is a top view, (B) is a front view. (A), (B), and (C) are enlarged longitudinal sectional views of the main part of the sheet. The drill which forms a decoration part is shown, (A) is a front view, (B) is a bottom view. The cutting by the said drill is shown, (A) is a top view, (B) is sectional drawing of the cut sheet | seat. It is a perspective view of the state which mounted the sheet | seat on the table. It is an expanded sectional view which shows the light reflection state in the decoration part of a sheet | seat. The modification of the peripheral end surface of a sheet | seat main body is shown, (A) is an expansion longitudinal cross-sectional view of the principal part of one modification, (B) is an expansion longitudinal cross-sectional view of the principal part of another modification. It is sectional drawing of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transparent sheet 2 Transparent sheet main body 2a Front surface 2b Back surface 2c Thick part 4 V groove 5 Peripheral end surface 7 Tapered surface 9 Decoration part R1, R2 Incident light R4-R6 Diffuse reflection light 20 Drill

Claims (5)

While the peripheral end surface of the transparent synthetic resin sheet body is provided with a tapered surface inclined inward toward the surface side of the sheet body,
On the back surface of the sheet body, a decorative portion made of a figure, a symbol, a letter, or a combination thereof is formed by a cut V-groove,
The V-groove has inclined surfaces on both sides thereof extending at a constant angle, and an asymmetric V-groove in which the angle of the inclined surfaces on both sides is changed, a symmetric V-groove having the same angle, or an asymmetric V-groove Any combination of symmetric V-grooves,
Configuration in which incident light that enters the thick portion of the sheet main body from the tapered surface of the peripheral end surface of the sheet main body is diffusely reflected on the surface side of the sheet main body at the boundary of the inclined surface of the V-groove to give the decoration portion a three-dimensional effect A decorative transparent sheet characterized by that.   The sheet body is made of a soft resin, and the V groove of the decorative portion is cut by an end mill or a drill, and the angle of the inclined surfaces on both sides of the V groove with respect to the perpendicular from the back surface of the sheet body is changed to be asymmetric. The decorative transparent sheet according to claim 1.   3. The decorative transparent sheet according to claim 1, wherein the taper surface is formed at an upper portion on a front surface side and a vertical surface is formed at a lower portion on a rear surface side on a peripheral end surface of the sheet body. . Together with the decorative part is formed in the vicinity of the peripheral end face of the seat body, the tapered surface and the vertical plane 請 Motomeko 3 that is formed continuously over the entire circumference of the peripheral surface of the seat body A transparent sheet for decoration as described in 1.   In addition to the V-groove, the decorative portion is provided with a fine line groove that is shallower and narrower than the V-groove, and is provided with an apparently planar cutting portion, which is combined with the thick linear groove of the V-groove. The decorative transparent sheet according to any one of claims 1 to 4.

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