JP2010116699A - Window sash - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a window sash which can extend the useful life of an antenna for broadcasting reception by preventing the antenna from being corroded by NOx, SOx, etc., blown down or broken. <P>SOLUTION: A light transmissible intermediate member 5 is interposed between two panels of window glass 4, and the thin film-like antenna 8 for broadcasting reception is formed on a surface of the intermediate member 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a window sash installed in a building such as a house, a building, or a hall, and more particularly to a window sash provided with a broadcast receiving antenna.

  Conventionally, a broadcast receiving antenna is generally installed on a roof of a house or on a veranda, and a signal cable is generally routed between the broadcast receiving antenna and a television installed indoors. is there.

  Since conventional broadcast receiving antennas are installed on the roof of a house or on a veranda, nitrogen oxides (NOx), sulfur oxides (SOx), salt, dust, It may be discolored or corroded by harmful substances such as bird droppings. Also, strong winds such as typhoons and heavy rain may cause the broadcast receiving antenna to fall or break, causing damage to the broadcast receiving antenna and the signal cable. is there.

  Further, in densely populated houses, broadcast receiving antennas are scattered on the roof of each house or from the veranda, so there is a problem that it is not preferable in view of the scenery.

  The object of the present invention is to eliminate such drawbacks of the prior art, and the broadcast receiving antenna is discolored and corroded by nitrogen oxide (NOx), sulfur oxide (SOx), salinity, dust, bird droppings, and the like. And it will not fall or break due to strong winds or heavy rain, extend the service life of the broadcast receiving antenna, obtain a clear image, and refresh the building landscape. Is to provide.

  In order to achieve the above object, the first means of the present invention is to carry a thin film broadcast receiving antenna by a window glass directly or through an intermediate member to be described later, and to set the end of the broadcast receiving antenna at the receiver. It is characterized in that it is taken out of the window frame directly or through a conductive member so as to be connected to the window.

  According to a second means of the present invention, in the first means, the broadcast receiving antenna is formed of a light transmissive conductive material.

  According to a third means of the present invention, in the first or second means, the broadcast receiving antenna is formed on an inner surface of the window glass.

  According to a fourth means of the present invention, in the third means, the two window glasses are formed to face each other, and the broadcast receiving antenna is formed on the inner surface of the window glass. A spacer is interposed in the inner peripheral portion, and a space formed by two window glasses and the spacer is hermetically sealed.

  According to a fifth means of the present invention, in the first or second means, a light-transmitting intermediate member is interposed between the two window glasses, and the broadcast receiving antenna is formed on the surface of the intermediate member. It is characterized by being.

  The present invention is configured as described above, and the broadcast receiving antenna is not discolored or corroded by nitrogen oxides (NOx), sulfur oxides (SOx), salt, dust, or feces of birds, In addition, the useful life of the broadcast receiving antenna can be extended without being overturned or broken by strong winds or heavy rain, and a favorable window sash can be provided on the building landscape. Particularly in digital broadcasting, the reception efficiency is good and a clear image can be obtained.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a window sash according to the first embodiment of the present invention, FIG. 2 is an enlarged sectional view of laminated glass used for the window sash, FIG. 3 is an enlarged view of FIG. 2A, and FIG. FIG. 5 is a plan view of the intermediate member used for the laminated glass, FIG. 6 is an enlarged development view of the clamping member used for the window sash, and FIG. 7 is the clamping diagram. It is an expansion perspective view of a member.

  As shown in FIG. 1, the window sash 1 according to the present embodiment mainly includes a laminated glass 2 and a sash frame 3 attached around the laminated glass 2.

  As shown in FIG. 2, the laminated glass 2 includes two window glasses 4 disposed so as to face each other, and a plate-like intermediate member sandwiched between the window glasses 4 and having approximately the same area as the window glass 4. It is composed of five.

  Since the intermediate member 5 is made of a synthetic resin molded plate, it is easy to give the surface smoothness. However, the window glass 4 is made of flow glass or the like, and the surface of the window glass 4 as shown in FIG. Fine irregularities 6 are formed on the whole, and the adhesion between the window glass 4 and the intermediate member 5 is not good. Therefore, the surface smoothing film 7 is formed in advance on the surface of the window glass 4 that contacts the intermediate member 5, and the intermediate member 5 is in close contact with the surface smoothing film 7.

The surface smoothing film 7 includes, for example, acrylic resins such as polymethacrylic acid methyl ester and polyacrylic acid ester, various synthetic resins such as polycarbonate resin, silicon resin and epoxy resin, or synthetic resins such as benzophenone derivatives and benzotriazole derivatives. A mixture of fine particles that absorbs ultraviolet rays made of an organic compound such as zinc oxide, titanium oxide, or cerium oxide is used.
The ultraviolet absorbing substance can be applied to the inner surface of one or both of the window glasses 4.

Further, as the surface smoothing film 7, a synthetic resin film in which an ultraviolet absorbing function is bonded in a polymer molecule as shown in the following molecular structural formula is preferable. In addition, the molar ratio [(ultraviolet absorption functional) / (SiO ₂ )] of the ultraviolet absorbing functional group and SiO ₂ in the polymer molecule is 1/5.

  The UV transmittance of the flow glass having a thickness of 3 mm on which the synthetic resin film having this molecular structural formula is formed is 1 to 2%, compared with the UV transmittance of 66% of the same flow glass having no synthetic resin film. Even a thin film has an extremely high ultraviolet absorbing ability.

  As the intermediate member 5, for example, polycarbonate resin or acrylic resin having transparent or translucent light transmittance is used.

  The following table is a table comparing the physical properties of a polycarbonate resin plate, an acrylic resin plate, and a glass plate.

Polycarbonate resin plate Acrylic resin plate Glass plate Light transmittance (%) 85-91 92 90 or more Light refractive index 1.6 1.5 1.5
Thermal conductivity (W / m · K) 0.19 0.16-0.25 1.10
Tensile yield stress (MPa) 59-69 55-76 34-83
Bending yield stress (MPa) 80-90 82-118 49

As is clear from this table, the polycarbonate resin plate and the acrylic resin plate have almost the same light transmittance and light refractive index as the glass plate, and the mechanical properties such as tensile yield stress and bending yield stress are higher than those of the glass plate. It tends to be excellent. Furthermore, since it has a thermal conductivity 77 to 85% lower than that of the glass plate, the effect of preventing dew condensation can be exhibited when used for a window sash. Moreover, since the polycarbonate resin plate and the acrylic resin plate have mechanical strength superior to that of the glass plate, they can exhibit a crime prevention function and a scattering prevention function when used for a window sash.

  FIG. 8 is a characteristic diagram showing the relationship between the thickness of the polymethacrylic acid methyl ester resin plate and the glass plate and the heat transmissivity. In FIG. 8, line B is the polymethacrylic acid methyl ester resin plate, and line C is the glass plate. It is a characteristic line.

  As is apparent from this table, the polymethacrylic acid methyl ester resin plate has a lower heat transfer rate than the glass plate, and this tendency appears as a significant difference as the plate thickness increases. Therefore, when this polymethacrylic acid methyl ester resin plate is used for a window sash, it appears as a heat retaining effect in air conditioning, and a high energy saving effect is obtained.

  A broadcast receiving antenna 8 is formed on one or both surfaces of the intermediate member 5 as shown in FIGS. The broadcast receiving antenna 8 is composed of a light transmissive conductive layer such as indium tin oxide (ITO), for example, and has a length and area suitable for reception such as a comb or tree as shown in FIG. Further, it is formed by appropriate means such as vapor deposition or printing. Since the window sash has a relatively large area, the broadcast receiving antenna 8 can easily secure a wide reception area.

  The two end portions 8 a and 8 b of the broadcast receiving antenna 8 extend to the upper end surface of the intermediate member 5. When the intermediate member 5 is a sheet (film), the end portions 8a and 8b of the broadcast receiving antenna 8 are formed to the vicinity of the end portion of the intermediate member 5, and the end portion of the intermediate member 5 is the end portion 8a of the broadcast receiving antenna 8. , 8b may be folded so that the end portions 8a, 8b of the broadcast receiving antenna 8 are exposed to the outside.

  The end portions (four corners in this embodiment) of the laminated glass 2 in which the two window glasses 4 are overlapped with the intermediate member 5 interposed therebetween are laminated by a plurality of clamping members 9 (9a to 9d) as shown in FIG. It is pinched elastically in the direction. When a plurality of clamping members 9 (9a to 9d) are mounted on the laminated glass 2, as shown in FIG. 5, one clamping member 9a contacts the end 8a of one antenna 8, and the other one clamping member 9 b comes into contact with the end 8 b of the other antenna 8.

  In this embodiment, a conductive clamping member 9 made of a metal plate is used. Specifically, the plate thickness is 0.25 to 0.3 mm, surface hardening is performed by gas carburizing, and rust prevention plating is performed. It is composed of an iron plate.

  As shown in FIG. 6, the planar shape of the developed clamping member 9 is rectangular, and the first clamping piece 10 and the second clamping piece provided at a predetermined interval from the first clamping piece 10. Part 11 and a connecting piece part 12 for connecting the first holding piece part 10 and the second holding piece part 11, and the first holding piece part 10, the second holding piece part 11 and the connecting piece part 12 are held. It is provided in parallel along the longitudinal direction of the member 9. Reference numeral 13 denotes a valley fold line (imaginary line) at the joint between the first sandwiching piece 10 and the connecting piece 12 and at the joint between the second sandwiching piece 11 and the connecting piece 12.

  A cutout portion 14 having a substantially V-shaped planar shape opened to the outside with an opening angle of about 90 degrees is formed at a substantially central position of the first holding piece portion 10 and the second holding piece portion 11. For example, a circular protrusion 16 is formed at an intermediate portion of one end edge 15 forming the cutout portion 14, and is opposed to the intermediate portion of the other end edge 17 forming the cutout portion 14, that is, the protrusion portion 16. A fitting portion 18 having the same shape as the protruding portion 16 (circular in this embodiment) is formed at the position.

  As shown in the drawing, the first sandwiching piece portion 10 and the second sandwiching piece portion 11 are valley-folded with respect to the connecting piece portion 12 along the valley fold line 13, and the connecting piece portion 12 is interposed therebetween. 10 and the 2nd clamping piece part 11 are made to oppose. Further, along the valley fold line 19, the first clamping piece 10, the second clamping piece 11, and the half of the connecting piece 12 are bent at a substantially right angle around the notch 14 with respect to the remaining half, The projecting portion 16 is fitted into the fitting portion 18 to constitute a holding member 9 having a substantially L-shaped side surface as shown in FIG. The L-shape of the clamping member 9 can be maintained by the engagement (prevention of detachment) of the protruding portion 16 and the fitting portion 18.

  As shown in FIG. 7, the front ends of the first sandwiching piece 10 and the second sandwiching piece 11 are slightly inward of each other, and the interval W is slightly larger than the total thickness T of the laminated glass 2 (see FIG. 2). Designed to be short.

  As shown in FIG. 1, the window glass 4 and the intermediate member are formed by the elastic clamping force of the first clamping piece portion 10 and the second clamping piece portion 11 by press-fitting and attaching the clamping members 9 to the four corners of the laminated glass 2. 5 is generally crimped.

  The clamping member 9 can be fixed to the laminated glass 2 by the clamping force of the first clamping piece 10 and the second clamping piece 11, but a double-sided tape or an adhesive may be used to ensure the fixation.

  By attaching the plurality of sandwiching members 9 to the laminated glass 2, the window glass 4 and the intermediate member 5 are generally crimped together. If the surface smoothing film 7 made of synthetic resin is formed on the surface of the window glass 4 at this time, the intermediate member 5 on which the antenna 8 is patterned adheres well to the surface. Can be eliminated to some extent.

  Moreover, since the window glass 4 and the intermediate member 5 can be prevented from being displaced from each other by mounting the clamping member 9 and can be handled as an integrated object, it is easy to carry in and carry out the next air venting process. Furthermore, the window glass 4 can be protected by mounting the clamping member 9, particularly the four corners of the window glass 4 can be protected, and the window glass 4 can be prevented from being broken or damaged during handling.

  The laminated glass 2 in which the constituent members are sandwiched by the sandwiching member 9 is set in a decompression device (not shown), and the compressor is operated to decompress the interior of the device to a predetermined pressure. By this decompression, the contact surface between the window glass 4 and the intermediate member 5 A small amount of air remaining on the window glass 4 is removed, and the window glass 4 and the intermediate member 5 are more closely adhered.

  When this air venting process is completed, the laminated glass 2 is taken out from the decompression device into the atmosphere, but due to the synergistic effect of the external pressure (atmospheric pressure) and the clamping pressure of the clamping member 9, the contact state between the window glass 4 and the intermediate member 5 remains good. The air does not enter the contact surface between the window glass 4 and the intermediate member 5 again.

  When the laminated glass 2 thus configured is attached to the sash frame 3, as shown in FIG. 4, the outer peripheral portion of the laminated glass 2 is preliminarily attached to the sash frame 3 via a beat 20 or caulk having a substantially U-shaped cross section. It is inserted into the formed groove 21.

  Since the beat 20 is usually made of a synthetic resin molding and has a certain degree of hardness, the fit of the beat 20 to the groove 21 is weak due to variations in the outer dimension of the beat 20 and the inner dimension of the groove 21. There is.

  In this embodiment, in order to solve this problem, as shown in FIG. 4, a single adhesive tape 23 such as a double-sided adhesive tape is provided on both side surfaces or one side surface of the fitting portion 22 that fits the groove portion 21 of the beat 20. Multiple sheets are pasted in advance. Then, the adhesive tape 23 is peeled off to fit the inner dimension of the groove portion 21 and inserted into the groove portion 21, thereby eliminating the decrease in fitting force due to the above-described variation in dimensions, and the laminated glass 2 to the sash frame 3. It can be installed properly. The example shown in FIG. 4 shows an example in which one adhesive tape 23 on the left side is peeled off to adjust the dimensions.

  In the case of the present embodiment, the broadcast receiving antenna 8 is completely shielded from the outside air by closely attaching the window glass 4 and the intermediate member 5 excluding air and attaching the laminated glass 2 to the sash frame 3 via the beat 20. Therefore, corrosion and alteration of the broadcast receiving antenna 8 can be effectively prevented.

  9 is an enlarged cross-sectional view of a laminated glass used in a window sash according to the second embodiment of the present invention, FIG. 10 is an enlarged cross-sectional view of a spacer used in the laminated glass, and FIG. 11 is a view of attaching the laminated glass to the window sash. It is a partially expanded sectional view which shows a state.

  As shown in FIG. 9, the laminated glass 2 according to the present embodiment includes two window glasses 4 arranged so as to face each other, and a spacer 24 that is continuously interposed in a peripheral portion between the window glasses 4. A space 25 is formed between the two window glasses 4 inside the spacer 24.

  Appropriate means such as vapor deposition or printing is provided on the inner surface of one or both of the window glasses 4 so that the antenna 8 made of a light-transmissive conductive layer such as ITO has a length suitable for reception such as a meandering shape or a spiral shape. Is formed by. Both end portions 8 a and 8 b of the antenna 8 extend to the upper end surfaces at the left and right ends of the window glass 4.

In the space portion 25, thermal conductivity is lower than air and specific gravity is heavier than air, for example, argon (thermal conductivity: 3.88 × 10 ⁻⁵ cal / cm · sec · deg specific gravity: 1.8). And an inert gas such as krypton (thermal conductivity: 21.2 × 10 ⁻⁶ cal / cm · sec · deg specific gravity: 3.7) or a gas such as dry air is enclosed to form the gas layer 26. Yes. Thus, by filling the space 25 with gas and forming the gas layer 26, a high heat retaining effect can be obtained, and deformation to the inside of the central portion of the window glass due to wind pressure can be suppressed.

  This gas is injected while inserting an injection needle into an adhesive layer 28 between the window glass 4 shown in FIG. 9 and a support 27 described later, and replacing it with the air inside. In addition, a thin tubular body communicating with the space 25 and the outside is embedded in the adhesive layer 28 in advance, the gas is injected through the tubular body, and the opening of the tubular body is closed after filling with the gas. You can also. Since the space 25 is filled with inert gas or dry air in this way, the antenna 8 formed on the inner surface of the window glass 4 is not altered or corroded, and the useful life of the antenna 8 is extended. Can do.

  The spacer 24 includes a support 27 and an adhesive layer 28 that is coated and supported on the entire outer periphery of the support 27. The support 27 is elongated and harder than the pressure-sensitive adhesive layer 28 such as a molded body of synthetic resin, a molded body of hard rubber, a metal wire, a metal plate, a water-repellent treated paper molded body, or a fiber molded body of synthetic fiber or carbon fiber. In this embodiment, a synthetic resin molded body made of polyvinyl chloride is used, and the cross-sectional shape is circular or elliptical.

  For the adhesive layer 28, for example, olefin rubber such as butyl rubber or acrylic rubber, gen rubber such as butadiene rubber or isoprene rubber, polyurethane rubber, silicone rubber, etc. are used. But butyl rubber is awarded because it has low adhesion, good adhesion to glass, and can maintain adhesive strength for a long period of time.

  Although not shown, the material of the elongated support 27 is pulled out from the reel at a predetermined speed by a pair of pulling rollers, and is fed into a mold of an extruder. A melt in a high-temperature state, which is a material of the adhesive layer 28, is pumped by a rotating screw into the mold cavity, covering the entire outer periphery of the material with a predetermined thickness, and a pair of materials from the mold together with the material. It is pulled out by a drawing roller. A film having good releasability such as polytetrafluoroethylene or silicone is formed on the outer peripheral surface of the drawing roller.

  A water-cooled or air-cooled cooling unit is provided between the mold and the drawing roller, and the melt coated and supported on the outer peripheral portion of the material is cooled to become the adhesive layer 28. The material covered with the adhesive layer 28 is cut into a predetermined length and used for assembling the laminated glass 2.

  In the case of the present embodiment, the outer diameter D1 of the support 27 shown in FIG. 10 is 1.2 to 1.8 mm, the outer diameter D2 of the adhesive layer 28 is 3 to 10 mm, and the spacer 24 is composed of two window glasses 4, 4, the width L (see FIG. 9) of the space 25 is maintained at 1.2 to 1.8 mm. Therefore, the entire adhesive layer 28 is crushed and deformed by the two window glasses 4, 4 as shown in FIG. 9, and the adhesive layer 28 adheres to the inner surfaces of the window glasses 4, 4. At the same time, since the cross-sectional shape of the support 27 is circular or elliptical, the contact pressure is concentrated on the outer peripheral surface facing the window glass 4, 4. Sex can be maintained.

  As in the first embodiment, the four corners of the laminated glass 2 are elastically held in the stacking direction by the plurality of holding members 9 (9a to 9d). When the sandwiching members 9a to 9d are attached to the laminated glass 2, one sandwiching member 9a contacts one end 8a of the antenna 8, and the other sandwiching member 9b contacts the other end 8b of the antenna 8. (See FIG. 9). The laminated glass 2 is attached to the sash frame 3 via a beat 22 as shown in FIG.

  In the above embodiment, the antenna 8 is attached to the inner surface of the window glass 4, but it is also possible to sandwich the rod-shaped antenna between the two window glasses 4 by interposing a rod-shaped antenna near the outer periphery of the space portion 25. It is.

  In the above embodiment, the two window glasses 4 are arranged through the space 25, but the broadcasting antenna 8 may be formed on the inner surface of one window glass 4, that is, the indoor side surface. Is possible. In that case, for the purpose of protecting the antenna 8, a protective film may be formed by sticking a transparent protective film on the entire inner surface of the window glass 4 on which the antenna 8 is formed, or by applying a transparent resin liquid. The protective film or protective film preferably has a function such as selectively transmitting or reflecting light and heat, absorbing ultraviolet rays, and preventing glass scattering.

  FIG. 12 is a view showing a state in which the window sash 1 of the embodiment is set between the upper rail 29 and the lower rail 30. Conductive contact pieces 31a and 31b are attached to the left and right ends of the upper side of the window sash 1, and one contact piece 31a is electrically connected to one end portion 8a of the antenna 8 through the clamping member 9a. The other contact piece 31b is electrically connected to the other end 8b of the antenna 8 through the clamping member 9b.

  As shown in FIG. 13, the upper rail 29 is provided with two conductive portions 33a and 33b along the longitudinal direction thereof via an electrical insulating layer 32, and one contact piece 31a is in elastic contact with the conductive portion 33a. The other contact piece 31b is in elastic contact with the conductive portion 33b. Rollers 34 made of synthetic resin such as polypropylene are attached to the left and right ends of the lower side of the window sash 1, and the rollers 34 roll on the lower rail 30.

  As shown in FIG. 13, the conductive portions 33 a and 33 b of the upper rail 29 are electrically connected to the antenna terminal portion 36 of the television receiver 35 via a signal cable 37. Therefore, even if the window sash 1 is opened and closed, radio waves emitted from a broadcasting station (not shown) are received by the antenna 8 built in the window sash 1, and the received video signal and audio signal are transmitted to the television receiver 35. can do.

  It is also possible to electrically connect the roller 34 and the antenna terminal portion 36 of the television receiver 35 using a metal conductive roller 34 that rolls on the lower rail 30. However, since dust, water, oil, and other foreign matters are likely to adhere to the lower rail 30 and there is a concern that it may interfere with the transmission of the received signal, the upper side of the window sash 1 as shown in the embodiment of FIG. It is preferable that the contact pieces 31a and 31b are attached to the upper and lower rails 29 so that the upper and lower rails 29 and 29 are in sliding contact with each other without the above-described problems.

  In the above embodiment, the movable window sash in which the window sash 1 moves on the rail has been described. However, the present invention is not limited to this and can be applied to a fixed window sash.

  As shown in FIG. 14, since the window sash 1 is generally installed in the house (building) 38 in the north-south direction, the east-west direction, or the like, the directionality of the antenna 8 is easy. In addition, when the antenna is installed on the roof or on the veranda as in the past, the antenna may fall down due to strong wind or earthquake, and the position and direction may be shifted. The antenna 8 is securely fixed.

1 is a plan view of a window sash according to a first embodiment of the present invention. It is an expanded sectional view of the laminated glass used for the window sash. It is an enlarged view of the FIG. 2A section. It is a partially expanded sectional view which shows the state which mounted | wore the laminated glass to the sash frame. It is a top view of the intermediate member used for laminated glass. It is an expanded development view of the clamping member used for the window sash. It is an expansion perspective view of the clamping member. It is a characteristic view which shows the relationship between the plate | board thickness of a polymethacrylic-acid methylester resin plate and a glass plate, and a heat-transfer rate. It is an expanded sectional view of the laminated glass used for the window sash which concerns on 2nd Embodiment of this invention. It is an expanded sectional view of the spacer used for the laminated glass. It is a partially expanded sectional view which shows the state which attached the laminated glass to the window sash. It is a figure which shows the state which set the window sash which concerns on embodiment of this invention between the upper rail and the lower rail. It is a figure for demonstrating the connection of the electroconductive part of the upper rail which concerns on embodiment of this invention, and the antenna terminal part of a television receiver. It is a schematic perspective view of a house.

Explanation of symbols

  1: window sash, 2: laminated glass, 3: sash frame, 4: window glass, 5: intermediate member, 6: unevenness, 7: surface smoothing film, 8: broadcast receiving antenna, 8a, 8b: broadcast receiving antenna , 9a to 9d: clamping member, 10: first clamping piece part, 11: second clamping piece part, 12: coupling piece part, 13: valley fold line, 14: notch part, 15: edge, 16 : Protruding part, 17: Edge, 18: Insertion part, 19: Valley fold line, 20: Beat, 21: Groove part, 22: Fitting part, 23: Adhesive tape, 24: Spacer, 25: Space part, 26: Gas layer, 27: support, 28: adhesive layer, 29: upper rail, 30: lower rail, 31a, 31b: contact piece, 32: electrical insulation layer, 33a, 33b: conductive part, 34: roller, 35: Television receiver, 36: antenna terminal, 37: signal cable.

Claims (5)

  A window sash comprising a thin film broadcast receiving antenna carried by a window glass and taken out of the window frame so that the end of the broadcast receiving antenna is connected to a receiver.   2. The window sash according to claim 1, wherein the broadcast receiving antenna is formed of a light transmissive conductive material.   3. The window sash according to claim 1, wherein the broadcast receiving antenna is formed on an inner surface of the window glass.   4. The window sash according to claim 3, wherein the two window glasses are formed to face each other, the broadcast receiving antenna is formed on an inner surface of the window glass, and a spacer is provided on an inner peripheral portion of the two window glasses. The window sash is characterized in that a space formed by two window glasses and a spacer is hermetically sealed.   3. The window sash according to claim 1, wherein a light transmissive intermediate member is interposed between the two window glasses, and the broadcast receiving antenna is formed on a surface of the intermediate member. And window sash.

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