JP2015150077A - Front window for game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a front window for a game machine, comprising two transparent plate shape members arranged to confront each other and excellent in sound insulation and weight-saved.SOLUTION: At least one of two transparent plate-shaped members 3 and 3 is constituted of a glass film laminate 30 having a glass film 31, an adhesion layer 32, a transparent resin plate 33, an adhesion layer 32 and a glass film 31 laminated in the recited order. The thickness dimension of the glass film 31 is 300 μm or less, and the thickness dimension of the transparent resin plate 33 is larger than that of the glass film 31.

Description

  The present invention relates to a front window of a gaming machine represented by, for example, a pachinko machine, and more specifically to a technique of a glass film laminate constituting a transparent plate member of a front window for a gaming machine.

Conventionally, for example, a front window of a gaming machine represented by a pachinko machine is configured by two transparent plate-like members that are arranged to face each other with a gap.
Here, the configuration of such a front window is intended to prevent illegal acts such as a path change by a ball hitting magnet or to suppress noise of hitting balls that repeatedly collide. At present, sufficient effects are not obtained.
Therefore, a technique for more effectively reducing the noise of hitting balls hitting repeatedly is disclosed in “Patent Document 1”.
That is, the technology disclosed by the above-mentioned “Patent Document 1” is a technology related to a front plate for a pachinko machine (a front window for a gaming machine) in which two glasses are arranged in front of a gaming board in a gaming machine, The glass on the side facing the game board is a laminated glass formed by laminating a glass plate and a transparent body via an intermediate film, and the intermediate film is a resin film A formed by block copolymerization of polystyrene and a rubber-based resin. It is characterized by being sandwiched by a heat-adhesive resin film B having transparency.

JP 2007-136057 A

According to the front plate for pachinko machines (the front window for gaming machines) according to the above-mentioned “Patent Document 1”, it is possible to suppress the noise of the hit ball repeatedly colliding with the front window of the gaming machine to some extent. It is difficult to say that the noise in the frequency range of 2000 to 4000 [Hz] to which the ear of the ear reacts sensitively is sufficiently suppressed.
Moreover, the laminated glass constituting the front plate for pachinko machine is heavy, and it is in a situation where it is unavoidable to increase the weight of the pachinko machine (game machine) as a whole. As a result, for example, the burden on the operator when replacing pachinko machines (gaming machines) in the store is heavy.

  The present invention has been made in view of the above-described current problems, and is a front window for a gaming machine including two transparent plate-like members arranged to face each other, and has excellent sound insulation properties. It is another object of the present invention to provide a front window for a gaming machine that is reduced in weight.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, the front window for a gaming machine according to claim 1 of the present invention is a front window for a gaming machine including two transparent plate-like members arranged to face each other, and At least one sheet is composed of a glass film laminate in which a glass film, an adhesive layer, a transparent resin plate, an adhesive layer, and a glass film are laminated in this order, and the thickness dimension of the glass film is 300 μm or less, and the transparent resin plate The thickness dimension is larger than the thickness dimension of the glass film.

  The front window for a gaming machine according to claim 2 of the present invention is characterized in that the intermediate film is formed of a thermosetting resin.

  The front window for a gaming machine according to claim 3 of the present invention is characterized in that the transparent resin plate is formed of either acrylic or polycarbonate.

  The front window for a gaming machine according to claim 4 of the present invention is characterized in that both of the two transparent plate-like members are constituted by the glass film laminate.

  The front window for a gaming machine according to claim 5 of the present invention is characterized in that the glass film has a Vickers hardness of 400 or more.

  The front window for a gaming machine according to claim 6 of the present invention is characterized in that an antireflection film is formed on the surface of the glass film.

  The front window for a gaming machine according to claim 7 of the present invention is characterized in that an antifouling film is formed on the surface of the glass film.

  As effects of the present invention, the following effects can be obtained.

  That is, according to the front window for a gaming machine according to claim 1 of the present invention, it is possible to realize a front window for a gaming machine that has excellent sound insulation and reduced weight.

  According to the front window for a gaming machine according to claim 2 of the present invention, since the sound insulation performance of the glass film laminate is improved by using the intermediate film made of a thermosetting resin, the sound insulation of the front window for the gaming machine is improved. Can be further enhanced.

  According to the front window for a gaming machine according to claim 3 of the present invention, the transparency of the glass film laminate is improved by using a transparent resin plate made of acrylic or polycarbonate. Can be increased.

  According to the front window for a gaming machine according to claim 4 of the present invention, it is possible to further improve the sound insulation and reduce the weight by configuring both of the two transparent plate members with the glass film laminate. it can.

  According to the front window for a gaming machine according to claim 5 of the present invention, a glass film laminate having excellent scratch resistance can be obtained by setting the glass film to a Vickers hardness of 400 or more. The hitting ball does not cause scratches and the like, and the visibility of the front window for gaming machines can be improved.

  According to the front window for a gaming machine according to claim 6 of the present invention, the reflection of external light on the glass film laminate is effectively prevented by forming the antireflection film on the surface of the glass film. The visibility of the front window for a gaming machine can be improved.

  According to the front window for a gaming machine according to claim 7 of the present invention, it is possible to prevent adhesion of fingerprints, dust and the like to the glass film laminate as much as possible by forming an antifouling film on the surface of the glass film. The visibility of the front window for a gaming machine can be enhanced.

The cross-sectional side view which showed the whole structure of the front window for game machines which concerns on one Embodiment of this invention. The cross-sectional side view which showed the whole structure of the glass film laminated body which comprises the front window for game machines. Schematic which showed the whole structure of the manufacturing apparatus of the glass film by the overflow downdraw method. The figure which showed the result of the verification experiment for evaluating the sound insulation of the front window for game machines.

  Next, embodiments of the invention will be described.

[Front window 1 for gaming machines]
First, the configuration of a front window 1 for a gaming machine that embodies the present invention will be described with reference to FIG.
In FIG. 1, the direction in which the human eye is shown is defined as the outside of a gaming machine (not shown) provided with the gaming machine front window 1.

  The gaming machine front window 1 in the present embodiment is a front window of a gaming machine represented by a pachinko machine, for example, and is mainly fitted into the frame 2 and the frame 2 that are rectangular in front view. It consists of a sheet of transparent plate-like members 3 and 3.

The two transparent plate-like members 3 and 3 are formed in substantially the same plate shape, and are arranged to face each other with a gap.
Further, these two transparent plate-like members 3 and 3 are provided on the inner side (in the direction opposite to the direction of arrow A) of the transparent plate-like member 3 (hereinafter referred to as “inner transparent plate-like member 3A” as appropriate). , Arranged so as to face the game board.

  In the present embodiment, the inner transparent plate-like member 3A is constituted by a glass film laminate 30 (see FIG. 2) described later, and the other transparent plate-like member 3 (hereinafter referred to as “outer transparent” as appropriate). The plate-like member 3 </ b> B ”is constituted by a common single-layer float glass sheet.

In addition, about the structure of the two transparent plate-shaped members 3 * 3, it is not limited to this embodiment, For example, while the inner side transparent plate-shaped member 3A is comprised by one layer of float plate glass, outer side transparent The plate-like member 3 </ b> B may be configured by the glass film laminate 30.
Further, for example, both the inner transparent plate member 3 </ b> A and the outer transparent plate member 3 </ b> B may be configured by the glass film laminate 30.

That is, it is only necessary that at least one of the two transparent plate-like members 3 and 3 is constituted by the glass film laminate 30.
However, when the glass film laminate 30 having excellent characteristics as described later is used for both the inner transparent plate member 3A and the outer transparent plate member 3B, the inner transparent plate member 3A and the outer transparent plate member 3B. Compared to the case of using either one of the above, it is possible to further improve the sound insulation and reduce the weight of the front window 1 for gaming machines, which is more preferable.

[Glass film laminate 30]
Next, the structure of the glass film laminated body 30 is demonstrated using FIG.

As described above, the glass film laminate 30 is a member for constituting the inner transparent plate member 3A in the present embodiment, for example.
As shown in FIG. 2, the glass film laminate 30 is mainly formed by laminating a glass film 31, an adhesive layer 32, a transparent resin plate 33, an adhesive layer 32, and the glass film 31 in this order.
That is, the glass films 31 and 31 are always laminated on the outermost layers on both sides of the glass film laminate 30.
Thereby, it is possible to appropriately protect the transparent resin plate 33 which is inferior in weather resistance and scratch resistance as compared with glass from physical deterioration factors such as ultraviolet ray and resin deterioration factors such as oxygen in the air and collision of objects. it can.

  The glass film 31 is formed of, for example, silicate glass or silica glass, preferably formed of borosilicate glass, soda lime glass, or aluminosilicate glass, and most preferably formed of alkali-free glass. The reason is as follows.

That is, in general, glass is a member having excellent weather resistance. For example, when an alkali component is contained in the glass film 31 in the present embodiment, the glass is exposed to the external environment for a long period of time. If the cation continues to be used, the cations on the surface of the glass film 31 gradually drop off, and a so-called soda blowing phenomenon occurs.
As a result, the surface of the glass film 31 may be structurally rough, and the translucency of the glass film 31 may be deteriorated.
From this, it can be said that the glass film 31 is more preferably formed of non-alkali glass.

Here, the alkali-free glass is a glass that does not substantially contain an alkali component (alkali metal oxide). Specifically, the mass ratio of the alkali component is 3000 [ppm] or less. It is glass.
Moreover, the mass ratio of the alkali component in the present embodiment is preferably 1000 [ppm] or less, more preferably 500 [ppm] or less, and most preferably 300 [ppm] or less.

Further, the two glass films 31 and 31 stacked on the outermost layer of the glass film laminate 30 may use the same type of glass material or different types of glass materials. .
For example, when the transparent plate-like member 3 (see FIG. 1) made of the glass film laminate 30 is used as the outer transparent plate-like member 3B in the front window 1 for gaming machines (see FIG. 1), it is exposed to the external environment. While the non-alkali glass that is superior in weather resistance is used for the outer glass film 31 that becomes the side to be played, soda lime glass or the like may be used for the inner glass film 31 that becomes the game board side.

By the way, when the thickness dimension of each glass film 31 exceeds 300 [micrometers], the weight of the glass film 31 which occupies for the weight of the whole glass film laminated body 30 will increase, and the weight reduction as the whole glass film laminated body 30 will be carried out. It is difficult to plan.
In addition, when the thickness dimension of the glass film 31 is larger than the thickness dimension of the transparent resin plate 33, the thickness dimension of the transparent resin plate 33 in the glass film laminate 30 is extremely small, and the glass film 31 is caused by the transparent resin plate 33. Cannot be effectively supported.

On the other hand, when the thickness dimension of the glass film 31 is 300 [μm] or less, the glass film 31 is rich in flexibility, and the glass film 31 alone cannot maintain rigidity.
In this case, since the glass film 31 is supported by the transparent resin plate 33, it is preferable to make the thickness dimension of the transparent resin plate 33 as large as possible compared to the thickness dimension of the glass film 31.

For this reason, in the present embodiment, the thickness dimension of the glass film 31 is extremely small compared to the thickness dimension of the transparent resin plate 33 by setting the thickness dimension of the glass film 31 to 300 [μm] or less. It is set to be.
In other words, the thickness dimension of the transparent resin plate 33 is set to be extremely larger than the thickness dimension of the glass film 31.
Thereby, the ratio of the glass film 31 which occupies the whole glass film laminated body 30 can be reduced, supporting the glass film 31 effectively by the transparent resin board 33, and the weight reduction of the glass film laminated body 30 is achieved. be able to.

Here, when the thickness dimension of the glass film 31 is less than 20 [μm], it becomes difficult to ensure sufficient strength for the glass film 31, for example, a projectile or the like unexpectedly collides with the glass film laminate 30. In this case, the glass film 31 is easily damaged.
Even in such a case, since the glass film 31 is firmly supported by the transparent resin plate 33, the glass film 31 immediately after the breakage does not scatter in an arbitrary direction.

Therefore, the thickness dimension of the glass film 31 is preferably 20 [μm] to 200 [μm], and most preferably 50 [μm] to 100 [μm].
Thereby, the thickness dimension of the glass film 31 can be made smaller and the weight reduction of the glass film laminated body 30 can be performed more efficiently.

By the way, the thickness dimensions of the two glass films 31 and 31 may be the same or different from each other.
For example, when the transparent plate-like member 3 (see FIG. 1) made of the glass film laminate 30 is used as the outer transparent plate-like member 3B in the front window 1 for a gaming machine, the outer side on the side exposed to the external environment. While the thickness dimension of the glass film 31 is set to be large (for example, 100 [μm]), the thickness dimension of the inner glass film 31 on the game board side is set to be small (for example, 50 [μm). ]). Conversely, the outer glass film 31 on the side exposed to the external environment is set to have a smaller thickness dimension, while the inner glass film 31 on the game board side is set to have a larger thickness dimension. It is good.

It is preferable that the density of the glass film 31 is set low.
Specifically, the density of the glass film 31 is preferably 2.6 g / cm ³ or less, and more preferably 2.5 g / cm ³ or less.
Thereby, the weight reduction of the glass film 31 can be achieved, and the weight reduction of the glass film laminated body 30 can be achieved eventually.

The Young's modulus of the glass film 31 is preferably set high.
Specifically, the Young's modulus of the glass film 31 is preferably 50 [GPa] or more, more preferably 60 [GPa] or more, and most preferably 70 [GPa] or more.
Thereby, even if the glass film 31 is thinned to a thickness of 300 [μm] or less, it is difficult to bend due to its own weight.
Moreover, since the support function of the glass film 31 requested | required of the transparent resin board 33 can be reduced, it becomes possible to form the glass film laminated body 30 with desired rigidity with the thinner glass film 31. Therefore, the weight of the glass film laminate 30 as a whole can be reduced.
Furthermore, when the Young's modulus of the glass film 31 is 70 [GPa] or more, a certain degree of rigidity can be imparted to the glass film 31 alone. In particular, it can be suitably used for such a structure that is required to reduce the weight and improve the rigidity of the glass film laminate 30 at the same time.

The Vickers hardness of the glass film 31 is preferably set high.
Specifically, the Vickers hardness of the glass film 31 is preferably 400 or more, more preferably 500 or more, and most preferably 550 or more.
Thereby, the glass film laminated body 30 with higher abrasion resistance can be formed.
In particular, when the Vickers hardness is 400 or more, such as a front window 1 for gaming machines in the present embodiment, a structure that simultaneously requires weight reduction of the glass film laminate 30 and improvement of scratch resistance. On the other hand, it can be suitably used.

The glass film 31 having the above characteristics is preferably formed by an overflow down draw method.
That is, the glass film 31 formed by the overflow downdraw method does not need to adjust the thickness dimension of the glass film 31 by polishing, grinding, chemical etching, or the like.
The overflow down draw method is a molding method in which the molding member does not come into contact with both surfaces of the glass film 31 when the glass film 31 is molded, and both surfaces (translucent surface) of the molded glass film 31 are fired surfaces. Therefore, high surface quality can be obtained without polishing.
Thereby, the glass film 31 with a thickness dimension of 300 [μm] or less can be manufactured in large quantities and at low cost.
Then, the adhesion between the glass film 31 and the transparent resin plate 33 can be improved while the adhesive layer 32 is interposed, and the glass film 31, the adhesive layer 32, and the transparent resin plate can be more accurately and accurately. 33 can be stacked.

Here, the outline of the overflow downdraw method will be described with reference to FIG.
In addition, regarding the following description, for convenience, the vertical direction in FIG. 3 will be defined as the vertical direction of the glass film manufacturing apparatus 40.

  Inside the molding furnace 41 of the glass film manufacturing apparatus 40, a molded body 42 having a wedge-shaped outer surface shape in cross-sectional view is provided, and glass (molten glass) G melted in a melting furnace (not shown) is formed into the molded body 42. As a result, the molten glass G overflows from the top of the molded body 42.

  Then, the molten glass G overflowing from the molded body 42 passes through both side surfaces of the molded body 42 that have a wedge shape in cross section, and joins at the lower end, whereby the molding of the glass film ribbon Gr is started.

The glass film ribbon Gr immediately after joining at the lower end of the formed body 42 is stretched downward by the pair of cooling rollers 43 and 43 while being restricted in contraction in the width direction, and is formed with a predetermined thickness dimension.
The glass film ribbon Gr having reached the predetermined thickness dimension is sequentially fed out by a plurality of pairs of annealing rollers 45, 45... In the slow cooling furnace 44, and the thermal strain is removed in the slow cooling furnace 44.
The glass ribbon Gr that has passed through the slow cooling furnace 44 is then cooled to a temperature of about room temperature while being fed out by the roller 46.
At least one set of the rollers 46 is constituted by a pulling roller, and is drawn out while pulling the glass film ribbon Gr between the cooling roller 43 and the annealing roller 45 in order to adjust the posture of the glass film ribbon Gr.

The glass film ribbon Gr cooled to about room temperature has its traveling direction changed from the vertical direction to the horizontal direction by a plurality of bending auxiliary rollers 47.
And the unnecessary part (part which the cooling roller 43, the annealing roller 45, etc. contacted) the glass film ribbon Gr which exists in the width direction both ends by the longitudinal direction cutting device 48 is cut and removed.

Thereafter, the glass film ribbon Gr is cut into predetermined lengths by the width direction cutting device 49.
Thereby, the glass film 31 in this embodiment is formed.

In addition, after the glass film ribbon Gr is cut into a predetermined length by the width direction cutting device 49, the glass film 31 is formed by cutting and removing unnecessary portions of the glass film ribbon Gr by the longitudinal direction cutting device 48. It is good as well.
Moreover, in the glass film manufacturing apparatus 40 mentioned above, although the method to shape | mold the glass film 31 by a single wafer type was demonstrated, it is not limited to this, For example, the unnecessary part of the glass film ribbon Gr by the longitudinal direction cutting device 48 After being cut and removed, the glass film ribbon Gr is wound into a roll shape through a slip sheet without being cut into predetermined lengths by the width direction cutting device 49, and a glass roll is produced separately. It is good also as forming the glass film 31 by unwinding a glass roll at the time of a lamination process with the board 33 (refer FIG. 2), and cut | disconnecting to predetermined length.

Next, the adhesive layer 32 will be described.
As shown in FIG. 2, the adhesive layer 32 is interposed between the transparent resin plate 33 and the glass films 31 and 31 provided on both side surfaces of the transparent resin plate 33, and the glass film 31 with respect to the transparent resin plate 33.・ To firmly bond 31.

The adhesive layer 32 is formed of, for example, an ultraviolet curable resin, a thermoplastic resin, or a thermosetting resin. Specifically, PVB (Poly Vinyl Butyral), EVA (Ethylene-Vinyl Acetate), ionoplast resin, or the like is used as the adhesive layer 32.
Thereby, the sound insulation performance as the glass film laminated body 30 whole improves, and the sound insulation of the front window 1 for game machines provided with the transparent plate-shaped member 3 which consists of a glass film laminated body 30 can further be improved.

Next, the transparent resin plate 33 will be described.
The transparent resin plate 33 is a member for supporting the glass film 31 as described above.
The transparent resin plate 33 is not particularly limited as long as it is a transparent resin. For example, polyethylene, polyvinyl chloride, polyethylene terephthalate, polyvinylidene chloride, polypropylene, polyvinyl alcohol, polyester, polystyrene, polyacrylonitrile, ethylene vinyl acetate copolymer , Ethylene-vinyl alcohol copolymer, ethylene-methacrylic acid copolymer, acrylic (polymethyl methacrylate), polycarbonate and the like.
In particular, since the transparency is excellent, the transparent resin plate 33 is more preferably formed of either acrylic or polycarbonate.

The thickness dimension of the transparent resin plate 33 can be appropriately set and selected from the thickness dimension of the two glass films 31 and 31, the target thickness dimension of the glass film laminate 30, and the like.
When the glass film laminate 30 is used for the front window 1 for a gaming machine, it is desirable that the glass film laminate 30 does not bend. Therefore, the transparent resin plate 33 firmly holds the two glass films 31 and 31. It is preferable to have a thickness dimension that can be supported.

The thickness dimension of the transparent resin plate 33 is preferably equal to or greater than the total dimension obtained by adding the thickness dimensions of the two glass films 31 and 31, and more preferably three times the thickness dimension of each glass film 31. .
In addition, when the thickness dimensions of the two glass films 31 and 31 are different, the thickness dimension of the transparent resin plate 33 is three times or more that of the glass film 31 having the larger thickness dimension. It is preferable to have.
Furthermore, the thickness dimension of the transparent resin plate 33 is more preferably 10 times or more, and most preferably 20 times or more the thickness dimension of each glass film 31.
Thereby, since the ratio of the transparent resin plate 33 to the whole glass film laminated body 30 increases, the weight of the whole glass film laminated body 30 can be further reduced, and the weight of the glass film laminated body 30 can be more effectively reduced. Can be achieved.

In the glass film laminated body 30 which consists of the above structures, it is also possible to form into a film on the surface of the glass film 31 * 31 laminated and arrange | positioned on the both surface side or single side | surface side.
Here, as a film forming method applied to the glass film 31, known methods such as sputtering method, CVD (Chemical Vapor Deposition) method, PVD (Physical Vapor Deposition) method, resistance heating method, ion plating method, spray coating, etc. The method can be used.

Since the glass film 31 has a very small thickness dimension of 300 [μm] or less, the temperature easily rises even when heated, and in particular, film formation that requires heating on the substrate is easy. .
That is, for example, rather than forming a film on a glass plate having a thickness of 2 [mm], the intermediate film 32 and the transparent resin plate are formed on the glass film 31 having a thickness of 300 [μm]. It is more economical to form the glass film laminate 30 having a thickness of 2 [mm] by laminating 33 in order because less heat capacity is required at the time of film formation.

  Thus, as a thin film layer formed on the surface of the glass film 31, for example, an antireflection film (AR coat), an antifouling film (AS film), an antiglare film, a metal film, a transparent conductive film, an ultraviolet cut film, an infrared ray A cut film, an insulating film, a magnetic film, or the like can be appropriately selected depending on the function to be imparted to the glass film laminate 30 and the intended application.

  And when using the glass film laminated body 30 as the front window 1 for game machines, especially when using it as the outer side transparent plate-shaped member 3B in the front window 1 for gaming machines, it is arrange | positioned on the outer side of the glass film laminated body 30. By forming an antireflection film (AR coating) on the surface of the glass film 31, it is possible to improve the visibility of the game board. For example, the antireflection film is formed by alternately laminating a low refractive index film having a refractive index lower than that of a glass substrate, a low refractive index layer having a relatively low refractive index, and a high refractive index layer having a relatively high refractive index. A dielectric multilayer film is used. The antireflection film can be formed by, for example, a sputtering method or a CVD method.

  In addition, by depositing an antifouling film (AS film) on the surface of the glass film 31 disposed outside the glass film laminate 30, it is possible to effectively prevent the attachment of dirt such as fingerprints, It is possible to improve visibility. The antifouling film preferably contains a fluoropolymer containing silicon in the main chain. Examples of the fluorine-containing polymer include a polymer having —O—Si—O— units in the main chain and having a water-repellent functional group containing fluorine in the side chain. The fluorine-containing polymer can be synthesized, for example, by dehydrating condensation of silanol.

  In addition, when forming an antireflection film and an antifouling film on the surface of the glass film 31, an antifouling film is formed on the antireflection film. When an antiglare film is used, an antiglare film is formed on the surface of the glass film 31, and an antireflection film and / or an antifouling film is formed thereon.

[Verification experiment]
Next, in order to confirm the sound insulation of the glass film laminate 30 constituting the transparent plate-like member 3 in the front window 1 for a gaming machine that embodies the present invention with reference to FIG. The verification experiment conducted will be described.

First, the present inventors prepared a glass film laminate of Example 1 as a sample of an embodiment of the present invention.
Moreover, the glass plate used as the comparative examples 1 and 2 was prepared as a comparison object of the said Example 1. FIG.

Here, for the glass film laminate of Example 1, two glass films (thickness dimension: 200 [μm]), two adhesive layers (thickness dimension: 400 [μm]), and one polycarbonate And a transparent resin plate (thickness dimension: 6.8 [mm]) made of a glass film, an adhesive layer, a transparent resin plate, an adhesive layer, and a glass film.
Moreover, about the glass plate (single glass) of the comparative example 1, the single-layer float plate glass which consists of thickness dimension 8 [mm] was prepared.
Furthermore, for the glass plate (laminated glass) of Comparative Example 2, two float plate glasses (thickness dimension: 4 [mm]) and an intermediate film made of one PVB (thickness dimension: 0.75 [mm]) Were laminated in order with a float plate glass, an interlayer film, and a float plate glass, respectively.

  Next, the inventors of the present invention have arranged a sound generator as a sound source in one room and a frequency measuring device and a noise measuring device in the other room in a laboratory that is separated into two rooms across a wall. A microphone to be connected to was arranged.

  Then, a glass film laminate (Example 1), a single glass (Comparative Example 1), and a laminated glass (Comparative Example 2) are fitted in order on the walls separating the two rooms, and sound is generated in one room. These glass film laminates (Example 1), single glass (Comparative Example 1), and laminated glass are measured by measuring the volume of sound emitted while changing the frequency from the container through the microphone in the other room. The sound insulation property of (Comparative Example 2) was measured as sound transmission loss.

The measurement results thus obtained are shown in FIG.
FIG. 3 shows acoustic transmission loss (unit [db]) on the vertical axis in each case of a glass film laminate (Example 1), a single glass (Comparative Example 1), and a laminated glass (Comparative Example 2). The horizontal axis represents the frequency (unit [Hz]), and is a graph showing the relationship between the two.

Here, the sound transmission loss shown on the vertical axis is obtained by subtracting the volume of sound caught through the microphone in the other room from the volume of sound emitted from the sound generator in one room in the laboratory. Represented by a numerical value.
The frequency value shown on the horizontal axis is represented by the frequency of the sound emitted from the sound generator.

  As shown in this figure, in the frequency region of 2000 to 4000 [Hz], in which the human ear reacts particularly sensitively, compared to the single glass (Comparative Example 1) and the laminated glass (Comparative Example 2), the glass The film laminate (Example 1) will exhibit more effective sound insulation.

In addition, the laminated glass (comparative example 2) in this verification experiment consists of the structure which bonded together two float plate glass with a thickness dimension of 4 [mm] by the intermediate film.
Here, generally, sound insulation tends to increase as the mass increases in accordance with the mass rule.
Therefore, for example, in a laminated glass constituted by two float plate glasses having a thickness dimension of 1 [mm] to several [mm] or less, further sound insulation is provided as compared with the laminated glass in this verification experiment (Comparative Example 2). Is inferior.

On the other hand, when the mass of the single glass (Comparative Example 1) is 100 [%], the mass ratio of the glass film laminate (Example 1) is about 50 [%], and the laminated glass (Comparative Example 2). ) Mass ratio is about 105%.
That is, the glass film laminate (Example 1) exhibits excellent sound insulation performance and can be reduced in weight.
Therefore, for example, by using a front window for a gaming machine provided with a transparent plate-like member made of a glass film laminate (Example 1), sufficient sound insulation is exhibited and light weight as a whole gaming machine (pachinko machine). Therefore, it is possible to reduce the burden on the operator when replacing the gaming machine (pachinko machine).

DESCRIPTION OF SYMBOLS 1 Front window for game machines 3 Transparent plate-shaped member 30 Glass film laminated body 31 Glass film 32 Adhesive layer 33 Transparent resin board

Claims (7)

A front window for a gaming machine comprising two transparent plate-like members arranged opposite to each other,
At least one of the two transparent plate-like members is
Consists of a glass film laminate laminated in the order of glass film, adhesive layer, transparent resin plate, adhesive layer, glass film,
The thickness dimension of the glass film is 300 μm or less,
The thickness dimension of the transparent resin plate is larger than the thickness dimension of the glass film,
A front window for a gaming machine. The adhesive layer is formed of a thermosetting resin.
The front window for a gaming machine according to claim 1, wherein the front window is a gaming machine. The transparent resin plate is formed of either acrylic or polycarbonate.
The front window for a gaming machine according to claim 1 or 2, wherein the front window is a gaming machine. Both of the two transparent plate members are constituted by the glass film laminate,
The front window for a gaming machine according to any one of claims 1 to 3, wherein the front window is a gaming machine. The glass film has a Vickers hardness of 400 or more.
The front window for a gaming machine according to any one of claims 1 to 4, wherein the front window is a gaming machine. An antireflection film is formed on the surface of the glass film.
The front window for a gaming machine according to any one of claims 1 to 5, wherein the front window is a gaming machine. An antifouling film is formed on the surface of the glass film.
The front window for a gaming machine according to any one of claims 1 to 6, wherein the front window is a gaming machine.

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