JP5445974B2 - Glass plate cooling device and glass plate cooling method - Google Patents

Description

  The present invention relates to a glass plate cooling device and a method for producing tempered glass, and includes a glass plate cooling device that rapidly cools and strengthens a glass plate by blowing cooling air to a glass plate heated to a temperature near the glass softening point and being in a high temperature state. The present invention relates to a method for cooling a glass plate.

  Tempered glass used for window glass for vehicles such as automobiles is generally heated to a bending temperature (for example, 600 to 700 ° C.) near a glass softening point of a glass plate cut into a predetermined size and shape. Next, the glass plate is bent by various bending methods such as press bending, self-weight bending, and roll forming, and then the bent glass plate is rapidly cooled and strengthened by a cooling device.

  FIG. 10 shows such a glass plate cooling device 1. In FIG. 10, only the upper cooling device 1 is shown, and the lower cooling device is omitted.

  The cooling device 1 includes a wind box 2 connected to a blower duct (not shown) and a number of nozzle chambers 3 provided on a plane facing the glass plate. The nozzle chamber 3 has a width corresponding to the width of a glass plate (not shown) in a direction perpendicular to the drawing, and a plurality of nozzle ports 4, 4... (See FIGS. 11A and 11B) at the tip thereof. It is formed continuously. When cooling air is supplied from a blower fan (not shown) to the wind box 2 through the blower duct, the cooling air flows into each nozzle chamber 3 and is ejected from the nozzle port 4 at the tip thereof. The upper and lower surfaces of the glass plate conveyed in the A direction are cooled.

  11A and 11B are a cross-sectional view and a plan view, respectively, of the nozzle timbre portion of the cooling device 1 shown in FIG.

  Each nozzle chamber 3 constituting the cooling air flow path includes a side plate 3a and a bottom plate 3c on both sides thereof, and a plurality of nozzle openings 4 are continuously scattered in the bottom plate 3c as shown in FIG. It is formed. An exhaust space 5 is formed between adjacent nozzle chambers 3 and 3. Accordingly, the cooling air blown from the nozzle port 4 collides with the glass plate and rises in temperature by cooling the glass plate, and the cooling air whose temperature has risen passes through the exhaust space 5 and is discharged to the outside of the cooling device 1. The

  However, in the above-described cooling device 1, the nozzle port 4 is provided by being perforated in a flat plate material that forms the end face of the nozzle chamber 3, so that the pressure loss of the cooling air ejected through the nozzle port 4 increases. As a result, the cooling efficiency is lowered due to the reduction in the air volume and the wind speed, and the strengthening ability of the glass plate is lowered. That is, the cooling device of FIG. 10 cannot give a high compressive stress in the thickness direction of the glass plate. When the strengthening ability of the glass plate is lowered, there is a problem that, when the glass plate is crushed, the glass plate is not shredded, so that it is not preferable as a windshield for automobiles, for example.

  Patent Document 1 discloses a cooling device that solves such a problem.

  The cooling device of Patent Document 1 has a guide surface that is inclined in the cooling air flow path between the wind box and the nozzle so that the opening cross section of the cooling air flow path becomes smaller from the wind box side toward the tip of the nozzle. According to this configuration, since the cooling air is guided to the nozzle hole along the inclined guide surface in the cooling air flow path, the pressure loss at the nozzle hole is reduced, the cooling efficiency is increased, and the strengthening action of the glass plate is enhanced. There is an advantage that can be.

JP 2000-281370 A

  By the way, although the cooling device of patent document 1 improves the cooling air flow path between a wind box and a nozzle hole, and makes pressure loss in a nozzle hole small, blow back air (from a nozzle port to a glass plate). A flat plate material of the nozzle chamber located between adjacent nozzle ports (corresponding to the bottom plate 3c in FIGS. 11A and 11B). Clash immediately. For this reason, there is a problem that blowback air stays in the space between the nozzle opening and the glass plate, and the air pressure in the space increases. Due to such a problem, there is a problem that it is difficult to obtain a desirable cooling capacity because the flow rate of air ejected from the nozzle port is reduced.

  The present invention has been made in view of such circumstances, and cooling is performed by smoothly exhausting air from the cooling device through the exhaust space without retaining blowback air in the space between the glass plate and the nozzle opening. It aims at providing the manufacturing method of the tempered glass which shreds favorably when it crushes, and the cooling device of the glass plate which can improve capability.

  In order to achieve the above object, the present invention is an air-cooling strengthening device for a glass plate provided with a cooling mechanism for blowing cooling air to a high-temperature glass plate, both surfaces of the glass plate heated to near the glass softening point temperature. A pair of wind boxes arranged on the side, a nozzle group composed of a plurality of nozzles provided on the side of the wind box facing the glass plate, and nozzle holes provided through the nozzles of the nozzle group The cooling air supplied to the wind box is jetted from the nozzle opening toward both surfaces of the glass plate, and the cooling air is blown back through the exhaust space to cool the glass plate. In the apparatus, an air guide member is provided between a plurality of nozzles constituting the nozzle group, and the air guide member has a cross-sectional area of the flow path of the blowback air from the tip of the nozzle to the wind box side. Gradually getting smaller toward To provide a cooling apparatus for a glass plate, characterized in that the guide surface is sea urchin inclined is formed.

  According to the glass plate cooling apparatus of the present invention, the blowback air that is ejected from the nozzle opening and collides with the glass plate, and is reflected from the glass plate, is an air guide member at a position substantially opposite to the position of colliding with the glass plate. It flows in a substantially vertical direction on the glass plate surface along the guide surface, and is discharged from the cooling device from the exhaust space. The guide surface of the air guide member is formed so as to be inclined so that the cross-sectional area of the flow path of the blowback air gradually decreases from the tip of the nozzle toward the wind box side. It smoothly flows in the vertical direction along the surface and is discharged from the cooling device. As a result, the blowback air does not stay in the space between the nozzle opening and the glass plate, and the blowback air is less likely to flow in the horizontal direction in the space, thus reducing the increase in air pressure in the space. it can. Moreover, since the fluctuation | variation of the air flow rate ejected from a nozzle opening becomes small, a high cooling capability can be acquired stably. Further, since blowback air smoothly flows along the inclined guide surface, noise such as wind noise can be suppressed to a low level.

  According to the present invention, the nozzle group includes a plurality of nozzle chambers arranged substantially parallel to each other, an exhaust space is formed between the plurality of nozzle chambers, and is perpendicular to the longitudinal direction of the nozzle chamber. The air guide member has a comb-like cross section in the direction, the nozzle ports are continuously scattered at the tip of the cooling air flow path of each nozzle chamber, and the air guide member between two nozzles adjacent to each nozzle chamber. And the exhaust space is preferably formed between adjacent nozzle chambers.

  According to the present invention, since the nozzle hole is formed in the flat plate material at the tip of the nozzle chamber, the accuracy of the nozzle hole is determined by the drilling apparatus. Therefore, if the nozzle holes are formed by a high precision machining device such as an NC lathe, the positional accuracy of the nozzle holes can be guaranteed and the pitch of the nozzle holes can be shortened, so that the cooling capacity can be further improved. it can. The exhaust space is formed between adjacent nozzle chambers.

  According to the present invention, it is preferable that the air guide member is formed in a substantially triangular shape in cross section, and both side surfaces of the top portion of the air guide member are the guide surfaces.

  According to the present invention, the air guide member having the simplest shape and the guide surface can be provided by forming the air guide member in a substantially triangular shape in cross section.

  Further, according to the present invention, the inclination angle of the guide surface is preferably 5 ° to 30 °. Moreover, it is preferable that the said inclination | tilt angle is an angle which the perpendicular line dropped from the top part of the said air guide member of a cross-sectional substantially triangular shape, and the one or other guide surface makes. Thereby, blowback air can be exhausted satisfactorily.

  According to the present invention, the length of the air guide member is preferably 5 mm to 50 mm. Moreover, it is preferable that the said length is the length of the perpendicular drawn down from the top part of the said air guide member of a cross-sectional substantially triangular shape to the base. Thereby, blowback air can be exhausted satisfactorily.

  When the inclination angle exceeds 30 °, the effect of reducing the exhaust pressure is small, and when it is less than 5 °, the effect of guiding the exhaust per unit length is small. If the length of the air guide member is too short, it will be difficult to obtain a pressure reduction effect, and if it is too long, the rigidity of the air guide member and the guide plate will drop, the device will become large, and the processing of the air guide member will be difficult. Problem arises. From these balances, the inclination angle is more preferably 15 ° to 25 °, further preferably 18 ° to 20 °, and the length of the air guide member is more preferably 15 to 25 mm, further preferably 20 mm.

  Moreover, according to this invention, it is preferable that the said glass plate is a window glass for vehicles. The glass plate cooled and tempered according to the present invention is favorably used as a side glass or rear glass of a window glass for a vehicle because it is finely fragmented when crushed.

  In order to achieve the above object, the present invention is a method for strengthening air cooling of a high-temperature glass plate, comprising a step of heating the glass plate to near the glass softening point temperature and a pair of both sides of the glass plate. An air box, a nozzle group comprising a plurality of nozzles provided on the side of the air box facing the glass plate, and nozzle holes provided through the nozzles of the nozzle group. And a step of cooling the glass plate from the nozzle opening toward both surfaces of the glass plate, and the cooling air is exhausted as blowback air through the exhaust space. In this case, a guide surface of an air guide member provided between a plurality of nozzles constituting the nozzle group guides the blowback air in the exhaust space, and the guide surface provided on the air guide member is: Cross section of the flow path of the blowback air There is provided a method of cooling the glass plate, characterized in that it is formed to be inclined from the tip of the nozzle to be gradually smaller toward the wind box side. According to the present invention, it is possible to produce tempered glass that is favorably shredded when crushed.

  According to the glass plate cooling apparatus of the present invention, the air guide action of the air guide member guide surface cools the blowback air through the exhaust space without staying in the space between the glass plate and the nozzle chamber. Since it can exhaust smoothly from an apparatus, the cooling capacity of a glass plate can be improved.

  Moreover, according to the manufacturing method of the tempered glass of this invention, since the cooling capacity of the glass plate is improved by the cooling device of this invention, the tempered glass which is favorably shredded when crushed can be manufactured. .

Whole front view of cooling device of embodiment Top view of nozzle chamber Perspective view of nozzle chamber Front view of nozzle chamber Vertical section of nozzle chamber Perspective view of nozzle block Explanatory drawing showing the flow direction of blowback air Perspective view of nozzle chamber with pipe-structure nozzle Explanatory drawing which showed the other example of the guide surface of an air guide member Schematic structural diagram of a conventional cooling device (A) is a longitudinal sectional view showing the configuration of a conventional nozzle chamber, and (B) is a plan view of the conventional nozzle chamber.

  Hereinafter, preferred embodiments of a glass sheet cooling device and a method for producing tempered glass according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows a front view (a left side view in FIG. 10) of a cooling device 10 for strengthening an automotive window glass by air cooling. A bending part (not shown) is provided at the front stage of the cooling device 10, and a heating furnace (not shown) is provided at the front stage of the bending part. The glass plate heated to the bending temperature in the heating furnace is bent at the bending portion, and the bent glass plate (automobile window glass) G shown in FIG. 1 is a cooling device. The air cooling is strengthened while passing 10. Thereby, the window glass for automobiles is manufactured. In addition, since the cooling device 10 of the embodiment has an improved cooling capacity as compared with the previous cooling device as will be described later, the manufactured glass sheet G is thinned into a cullet having a preferable size when crushed. Tidy up. Therefore, the cooling device 10 according to the embodiment is suitable as a cooling device for manufacturing an automotive window glass. In addition, although the example which cools and wind-cooling strengthens after cooling a glass plate in a bending molding part here is possible, it is also possible to carry out air cooling strengthening of a flat glass plate, in that case, a bending molding part is It can be omitted.

  The cooling device 10 includes a pair of wind boxes 12, 12 arranged to face both upper and lower surfaces of the glass plate G, and nozzle groups 14, 14 provided on the side of the wind boxes 12, 12 facing the glass plate G. It consists of and. The nozzle group 14 is composed of a plurality of comb-shaped nozzle chambers 16, 16... Arranged in a direction orthogonal to the paper surface of FIG.

  Each nozzle chamber 16, 16... Has a nozzle block 24 to which a plurality of nozzles 26 are connected, and is provided with a nozzle hole 32 provided through the nozzle 26 as a cooling air flow path. As shown in FIGS. 2 and 3, the tip of the cooling air flow path of the nozzle hole 32 forms a plurality of nozzle ports 18, 18... That discharge the cooling air, and the nozzle port 18 is continuous with the end of the nozzle chamber 16. Be present. Further, air guide members 20, 20... Are formed between the nozzles 26 of the respective nozzle chambers 16, 16. 2 shows three rows of nozzle chambers 16 and FIG. 3 shows one row of nozzle chambers 16, a plurality of nozzle chambers 16 are arranged corresponding to the size of the glass plate G to be air-cooled. Further, an exhaust space 22 is formed between the nozzle chambers 16 and 16 as shown in FIG. 2, and blowback air described later is exhausted to the outside of the cooling device 10 through the exhaust space 22.

  The glass plate G conveyed to the cooling device 10 in the direction orthogonal to the paper surface of FIG. 1 is ejected from the plurality of nozzle ports 18, 18... Of the nozzle chambers 16, 16. It is quenched and strengthened by the cooling air. In addition, as for the conveyance speed of the glass plate G, 5 m / min-15 m / min and the ejection speed of the cooling air from the nozzle port 18 are 100-200 m / sec. The nozzle hole diameter is preferably about 3 to 20 mm, but can be appropriately set in consideration of the number of nozzle holes, the arrangement, the air volume of the apparatus, the stress characteristics required for the product, and the like in addition to the above conditions.

  Next, the nozzle chamber 16 constituting the cooling air flow path will be described.

  FIG. 4 is a front view of the nozzle chamber 16 in which the side plate 23 indicated by a two-dot chain line is removed and the nozzle block 24 constituting the nozzle chamber 16 is exposed. FIG. 5 is a longitudinal sectional view taken along the line AA in FIG. 4. In FIG. 5, side plates 23 and 23 on both sides are shown. FIG. 6 is a perspective view of the nozzle block 24. The nozzle chamber 16 shown in FIGS. 4 to 6 is the nozzle chamber 16 positioned on the upper side with respect to the glass plate G. Since the nozzle chamber 16 positioned on the lower side with respect to the glass plate G has the same configuration, the nozzle chamber 16 positioned on the upper side will be described here, and the description of the lower nozzle chamber 16 will be omitted.

  As shown in FIG. 5, the nozzle chamber 16 includes a nozzle block 24 and side plates 23 and 23 that sandwich the nozzle block 24 on both side surfaces. The nozzle block 24 constitutes the tip of the nozzle chamber 16, and sawtooth teeth in which triangular teeth 28, 28... Are continuously formed as shown in FIG. A shaped portion 30 is formed. A nozzle hole 32 is formed in the nozzle 26 between the teeth 28 of the serrated portion 30 in the vertical direction, and nozzle openings 18, 18. In addition, it is preferable from a viewpoint of preventing the pressure loss fall of a cooling wind that these nozzle openings 18 and the nozzle hole 32 finish an inner surface smoothly by reamer process.

  Both side surfaces 28 </ b> A of each tooth 28 of the nozzle block 24 are inclined toward the nozzle hole 32, and serve as guide surfaces that guide the cooling air to the nozzle port 18. A hole 28B is formed in a substantially central portion of the tooth 28, and both side plates 23 and 23 are fixed to the nozzle block 24 by the rivets 34 shown in FIG. 5 inserted through the hole 28B, whereby the nozzle chamber 16 is configured. Is done. Moreover, the hole 28B is not formed in all the teeth 28, but is formed every other tooth.

  The nozzle chamber 16 equipped with the nozzle block 24 having such a configuration is provided in a comb-like shape on the wind box 12 to constitute the nozzle group 14 shown in FIG. Then, the cooling air sent from the wind box 12 of FIG. 1 to the nozzle chamber 16 is guided along the inclined side surfaces 28A and 28A on both sides of each tooth 28 of the serrated portion 30 serving as a guide surface, and the nozzle hole. 32 is ejected from the nozzle port 18 toward the glass plate G. Thereby, the glass plate G is strengthened by air cooling.

  Incidentally, as shown in FIGS. 3 and 4, the air guide member 20 described above is formed on the nozzle 26 of the nozzle block 24 protruding from the tip of the nozzle chamber 16.

  The air guide member 20 is provided between two adjacent nozzle openings 18, 18 in one nozzle chamber 16. As shown in FIG. 5, the air guide member 20 has a triangular cross section, and guide surfaces 20A and 20A are formed on both sides of the top. The guide surfaces 20A and 20A are inclined so that the horizontal cross-sectional area of the flow path 36 of the blowback air gradually decreases from the nozzle port 18 toward the wind box 12 as shown in FIG. That is, the horizontal sectional area of the space (flow path 36) formed between the guide surfaces 20A, 20A facing each other in the two adjacent nozzle chambers 16, 16 is directed from the tip of the nozzle 26 toward the exhaust space 22. It is getting smaller.

  Next, the operation of the cooling device 10 configured as described above will be described.

  As shown in FIG. 7, blowback air that is ejected from the nozzle openings 18, 18, collides with the glass plate G, and is reflected from the glass plate G is reversed as indicated by the two-dot chain line in FIG. 7. The reversed blowback air flows in the vertical direction (directly above in FIG. 7) along the guide surfaces 20A and 20A of the air guide members 20 and 20 that are substantially opposite to the colliding position, and passes through the exhaust space 22. It is discharged from the cooling device 10.

  As described above, the guide surfaces 20A and 20A of the air guide member 20 are formed so as to be inclined so that the horizontal cross-sectional area of the flow path 36 of the blowback air decreases from the tip of the nozzle 26 toward the air box 12 side. ing. For this reason, the blowback air smoothly flows in the vertical direction along the guide surfaces 20 </ b> A and 20 </ b> A and is discharged from the cooling device 10. Thereby, the blowback air does not stay in the space 38 between the nozzle port 18 and the glass plate G. In addition, since the blowback air hardly flows in the horizontal direction in the space 38, an increase in the air pressure in the space 38 can be reduced. Further, since the fluctuation of the flow rate of air ejected from the nozzle port 18 is reduced, a high cooling capacity can be stably obtained for the glass plate G. Further, since blowback air smoothly flows along the inclined guide surfaces 20A and 20A, noise such as wind noise can be suppressed to a low level.

  On the other hand, as shown in FIG. 8, a large number of nozzles 6 having a pipe structure with a predetermined length are extended from the nozzle chamber 7 toward the glass plate to increase the distance between the tip surface 7A of the nozzle chamber 7 and the glass plate. Thus, there is also known a nozzle chamber 8 in which the space between the tip surface 7A of the nozzle chamber 7 and the glass plate is widened to prevent the blowback air from staying. However, since this nozzle chamber 8 fixes the nozzle 6 to the nozzle chamber 7 by welding, it is very difficult to obtain the positional accuracy of the nozzle 6 due to the influence of thermal distortion caused by welding. Therefore, it is difficult to obtain a high cooling capacity. In addition, since the pipe-structure nozzle 6 does not have high rigidity, when the operator touches the nozzle 6 during maintenance of the nozzle chamber 8, the nozzle 6 is easily bent. As a result, there is a problem that the production efficiency of tempered glass is reduced because it takes time to repair and adjust. Furthermore, since the nozzle 6 has to be lengthened in order to widen the space, there is a problem that the pressure loss of the cooling air in the nozzle 6 becomes high.

  On the other hand, the nozzle group 14 according to the embodiment is configured such that the nozzle hole 32 is formed in the nozzle block 24 at the tip of the nozzle chamber 16 as described above with reference to FIGS. The accuracy of the nozzle hole 32 is determined by a drilling apparatus. Therefore, if the nozzle hole 32 is formed by drilling with a high precision processing device such as an NC lathe, high positional accuracy of the nozzle hole 32 can be guaranteed. At the same time, since the pitch of the nozzle holes 32 can be shortened, the cooling capacity can be further improved. In addition, since there is no pipe-structure nozzle during maintenance, the nozzle will not bend. Therefore, according to the cooling device 10 of the embodiment, it is possible to obtain a high cooling capacity and improve the production efficiency of tempered glass as compared with a cooling device having a pipe structure nozzle.

  Also, here, an example is shown in which an air guide member is provided between the nozzles 26 arranged in a straight line in the nozzle chamber 16 formed in a blade shape, but if it is between adjacent nozzle holes, An air guide member can be provided, and an air guide member can be formed between two or more nozzles 26. A nozzle chamber in which nozzle groups are connected in various ways can be formed as long as the exhaust space 22 can be secured within a range that does not hinder the exhaust, and a nozzle chamber in a lattice shape or a honeycomb shape is formed depending on how the nozzle groups are connected. It is also possible to do.

  In the cooling device 10 of the embodiment, the air guide member 20 is formed in a substantially triangular shape in cross section, and both side surfaces of the top portion of the air guide member 20 are used as guide surfaces 20A and 20A. Thus, by forming the air guide member 20 in a substantially triangular shape in cross section, the air guide member 20 and the guide surface 20A having the simplest shape can be provided.

  In addition, the guide surface 20A of the air guide member 20 is manufactured not only by a flat surface but also as shown in FIGS. 9A, 9B, and 9C by using a high-precision machining device such as an NC lathe. A curved guide surface 20a, 20b, 20c such as a streamlined type or a guide surface 20d formed by combining a plurality of curved surfaces as shown in FIG. 9D can be easily manufactured and applied. However, it is preferable that the guide surface is a surface that acts to increase the exhaust resistance of the blowback air so that no vortex flow of the blowback air is generated. Here, although the example which processes each member with NC lathe was shown, it cannot be overemphasized that each member can also be produced by other methods, such as casting, by desired performance and a system.

  Further, in order to further prevent stagnation of blowback air, the corner portion 25 formed by the side surfaces of the tip of the substantially square-shaped nozzle 26 in which the nozzle port 18 is formed as shown in FIG. It is preferable to have a curved surface shape within a range that does not affect.

  On the other hand, as shown in FIG. 7, the inclination angle θ of the guide surface 20A is preferably 5 ° to 30 °. Thereby, blowback air can be exhausted satisfactorily. Further, the inclination angle θ is more preferably 15 ° to 25 °, and further preferably 18 ° to 20 °. Note that the inclination angle θ is an angle formed by a perpendicular line extending from the top to the bottom of the air guide member 20 having a triangular cross section and one or the other guide surface 20A.

  The length L of the air guide member 20 is preferably 5 mm to 50 mm. Thereby, blowback air can be exhausted satisfactorily. Further, the length L is more preferably 15 to 25 mm, further preferably 20 mm. Note that the length L is the length of a perpendicular line extending from the top to the bottom of the air guide member 20 having a triangular cross section.

  Moreover, according to the cooling device 10 of embodiment, it is preferable that the glass plate G is a window glass for vehicles. This is because the tempered glass produced by the cooling device 10 of the embodiment has high strength and is finely fragmented when crushed. Also, here, an example in which the glass plate G is bent and molded so as to have a constant curvature and then strengthened by quenching has been shown. Needless to say, it can also be applied.

  On the other hand, according to the manufacturing method of the tempered glass which uses the cooling device 10 of embodiment, the tempered glass which is favorably shredded when crushed can be manufactured.

The glass plate air-cooling device of the present invention is provided with a blowback air at the time of air-cooling strengthening processing of the glass plate from the cooling device through the exhaust space without staying in the space between the glass plate and the nozzle chamber for cooling. Since it can be exhausted smoothly, the cooling capacity of the glass plate can be improved, and tempered glass that can be finely shredded when crushed can be produced, and tempering processing of glass plates for vehicles such as automobiles Can be used for
The entire contents of the specification, claims, drawings and abstract of Japanese Patent Application No. 2008-324196 filed on Dec. 19, 2008 are cited here as disclosure of the specification of the present invention. Incorporated.

  DESCRIPTION OF SYMBOLS 10 ... Cooling device, 12 ... Air box, 14 ... Nozzle group, 16 ... Nozzle chamber, 18 ... Nozzle port, 20 ... Air guide member, 20A ... Guide surface, 22 ... Exhaust space, 23 ... Side plate, 24 ... Nozzle block, 26 ... Nozzle, 28 ... Teeth, 30 ... Serrated portion, 32 ... Nozzle hole, 34 ... Rivet, 36 ... Channel, 38 ... Space,

Claims (6)

An air-cooling strengthening device for a glass plate provided with a cooling mechanism for blowing cooling air to a high-temperature glass plate,
A pair of wind boxes arranged on both sides of the glass plate heated to near the glass softening point temperature, a nozzle group comprising a plurality of nozzles provided on the side of the wind box facing the glass plate, and the nozzle group A nozzle hole provided through each of the nozzles,
In the glass plate cooling apparatus in which the cooling air supplied to the wind box is ejected from the nozzle opening toward both surfaces of the glass plate, and the cooling air is exhausted as blowback air through the exhaust space.
An air guide member is provided between the plurality of nozzles constituting the nozzle group, and the air guide member has a cross-sectional area of the flow path of the blowback air from the tip of the nozzle toward the wind box side. An apparatus for cooling a glass plate, characterized in that a guide surface inclined so as to be gradually reduced is formed.   The nozzle group includes a plurality of nozzle chambers arranged substantially parallel to each other, and an exhaust space is formed between the plurality of nozzle chambers, and has a comb-like cross section in a direction perpendicular to the longitudinal direction of the nozzle chamber. The nozzle ports are continuously scattered at the tip of the cooling air flow path of each nozzle chamber, and the air guide member is formed between two nozzles adjacent to each nozzle chamber. The glass plate cooling device according to claim 1, wherein the exhaust space is formed therebetween.   The glass plate cooling device according to claim 1 or 2, wherein the air guide member is formed in a substantially triangular shape in cross section, and both side surfaces of a top portion of the air guide member are the guide surfaces.   The said glass plate is a window glass for vehicles, The cooling device of the glass plate of Claim 1, 2, or 3. A method of air-cooling strengthening of a high-temperature glass plate,
A nozzle group comprising a step of heating the glass plate to near the glass softening point temperature, a pair of wind boxes disposed on both sides of the glass plate, and a plurality of nozzles provided on the side of the wind box facing the glass plate A nozzle hole penetrating through each nozzle of the nozzle group, and blowing the cooling air supplied to the wind box from the nozzle port toward both surfaces of the glass plate. A cooling step,
When the cooling air is exhausted as blowback air through the exhaust space, a guide surface of an air guide member provided between a plurality of nozzles constituting the nozzle group is blown in the exhaust space. Guide the back air,
The guide surface provided on the air guide member is formed so as to be inclined so that the cross-sectional area of the flow path of the blowback air gradually decreases from the tip of the nozzle toward the wind box side. A method for cooling a glass plate.   The method for cooling a glass plate according to claim 5, wherein the glass plate is a window glass for a vehicle.

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