JPH0769662A - Bending mold for glass plate - Google Patents

Abstract

PURPOSE:To outstandingly and securely improve the accuracy of bending corner parts in deep bending of a glass plate by gravity bending by providing the inner side of the bending corner parts with specific pressing parts and providing the outer side of the bending corner parts with specific plate supporting parts matching the bending curvature shape of the glass plate. CONSTITUTION:This bending mold 1 for the glass plate is constituted by arranging a fixing part 3 for a central area to be placed with the glass plate 2 and vane parts 4 of side areas freely oscillatably connected to the fixing part 3 on a mold truck. The bending mold is arranged with the fixing part 3 and the vane parts 4 and is provided with a supporting part 6 in the upper part of the mold races 5 of the fixing part 3 and the vane parts 4. The following constitution is added to such bending mold: (1) The front end of arms 12 extending from brackets 11 to the vane part 4 side are provided with the pressing parts 15 for bringing the bending corner parts of the glass plate 2 and the inner edge parts within the area into pressurized contact with each other right above the bending corner parts 14 and the supporting parts 6 of the area. (2) Both supporting parts at the opposite ends of the fixing part 3 an the vane parts 4 are provided with the plate supporting parts 16, 17 of the bent shape matching the curvature of the bending corner parts 14 of the glass plate 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending mold for a glass plate, which heats a glass plate and deeply bends it by utilizing its own weight, and more particularly to an improvement thereof.

[0002]

2. Description of the Related Art Conventionally, as a bending mold for a glass plate, a glass plate is placed on a bending mold, and the whole is heated in a heating furnace to be softened. The method of bending along the frame is widely used.

Recently, for example, the front of an automobile,
In the rear glass, in order to widen the driver's field of view and improve safety and improve the habitability in the vehicle, there is a demand for a window glass in which the entire glass is gently bent, and the curvature of the bent portion is reduced, Further, not only for window glass for automobiles, but also for various glass plate-like bodies, there has been an increasing demand for further improvement in the bending accuracy of the bent portions thereof, which has been proposed.

For example, in Japanese Utility Model Laid-Open No. 63-44434, for the purpose of improving the machining accuracy in addition to deep bending, the main body frame portion and the main body frame portion are swingably connected via a supporting rod. The side frame part which is movable with respect to the main body frame part is formed so as to be movable toward and away from the main body frame part, and a stopper for locking the side edge of the glass plate placed on the outer edge of the side member is provided. A bending mold for bending a glass plate is described.

Further, the applicant of the present invention has previously filed Japanese Utility Model Publication No. 2-14972.
No. 5 provided a glass plate bending die provided with a pressing portion for contacting the edge portion of the glass plate when the glass plate for vehicles was formed by self-weight bending. Furthermore, the applicant of the present application is the application No. 5-14.
In the self-weight bending mold of No. 480, which is composed of a central fixed part composed of inner and outer members and wing parts swingably connected to both sides,
A support is provided above the inner member of the wing, and a rotatable arm is provided on a pair of brackets protruding from the lower edge of the corner of the outer member of the wing, and the edge of the glass plate is located directly above the support. A glass plate for deep bending in which a bar is provided laterally between a pair of arms provided with a pressing portion for contacting the bar and a hook that is fixed to an outer member and can be inserted and fixed so that the bar is locked. I proposed a bending mold.

[0006]

[Problems to be Solved by the Invention]
In the publication No. 34, it is difficult to lock the periphery of the edge of the glass plate placed on the outer edge side of the side member with a uniform load by a stopper, and once the phenomenon of warping is generated at the corner part, the correction can be made. The fitting between the support member fixed to the sliding portion, that is, the main body frame portion and the guide rod fixed to the side member, which cannot be performed, also affects the parallelism of parallelism between the support members fixed to the main body frame portion, and It is extremely difficult to slide by following the different expansion and contraction amounts on the upper side and the lower side and the load due to warping, there is a problem that considerable play is required for fitting and accuracy is affected. Kaihei 2
No. 149725 is an improvement of the above-mentioned bending type for bending a glass plate, but when the angle between the glass plate of the fixed part in the central part and the wing is 60 ° or more, the weight of the pressing part is the glass plate. There is a problem that the intended purpose cannot be achieved, and in Japanese Patent Application No. 5-14480, the bending accuracy of the bending corner portion of the glass plate is not always stable with high accuracy. However, there is a problem that it may be difficult to say when precision finishing is required.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and in particular, in deep bending by so-called self-weight bending, a peculiar pressing portion is provided inside a bending corner portion. Moreover, by providing a unique plate support part that matches the bending curvature shape of the glass plate on the outside of the bending corner part, the bending accuracy of the bending corner part of the bending glass plate can be significantly improved, and it can be made reliable and stable. The present invention provides a bendable mold for a glass plate.

That is, according to the present invention, a fixed portion in the central area for placing a glass plate on a mold carriage and a wing portion in a side area swingably connected to the fixed portion are arranged, and the fixed portion is provided. In a bending mold for a glass plate, in which a supporting portion is provided on an upper portion of a mold race of a wing portion, a bracket is rotatably raised from a pillar provided on a mold receiving frame and a supporting member in a wing portion side region of the fixing portion to project. The bending corner portion of the glass plate and the edge portion inside the area directly above the bending corner portion and the supporting portion in the area, at the tip of the arm extending from the bracket to the wing side. A bending corner portion which is provided with a pressing portion for pushing and which is laterally provided in the bracket and a hook which is fixed to the mold race and can be inserted and fixed so as to lock the bar, and which is attachable to and detachable from the glass plate. Toso The zone retainer inner die is arranged symmetrically at four locations on the blade side area of the fixed portion, and both supporting portions at the relative ends of the fixed portion and the blade portion are aligned with the curvature of the bent corner portion of the glass plate. A bending die for a glass plate, which is characterized in that it has a plate supporting portion of a shape.

In addition, the support portion is tooth-shaped, and the bending corner portion and the tooth-shaped pressing portion of the area holding inner die are at least the central portion of the bending corner portion and the teeth of the fixed portion and the wing portion. Bending so that the plate supporting portion on the fixed side is flat and the plate supporting portion on the wing side is aligned with the curvature of the bending corner of the glass plate. Provided are the above-mentioned bending dies for glass sheets, each of which is characterized by a shape.

[0010]

As described above, according to the present invention, the bent corner portion of the glass plate and the edge portion of the glass plate on the fixed portion corresponding to the bent area are abutted so as to sandwich the upper and lower surfaces of the bent inner and outer surfaces, and the contact pressure is fixed. At the bending corner and its area on the wing side, when the bending reaches a predetermined place, the weight shortage due to the insufficient area of the glass plate causes the warp to rise or the bending curvature to deform. Then, it is corrected by abutting and holding with the edge of the glass plate rising by deep bending so that it is sandwiched between the left and right inner and outer surfaces of the bend, and the curvature of the glass plate at the bending corner is pressed and supported by the plate support. The fixed action of the fixed part, followed by the press formation of the bent corners, and then the press correction of the wing that rises up, in order to form the press of the wing. More, variations, of course, can be of improving the bending accuracy of the remarkable bent corners to prevent deformation expressed in particular 60 ° or more deep bending,
For example, in a wide range of fields, such as dramatically increasing the rate of matching with mounting frames, etc., such as architectural window materials, vehicle window materials, windshields for motor boats, cover glasses for lighting, and glass plates such as glass for aquarium, etc. Further, it is possible to provide a bending die for a glass plate, which is useful for bending tempered glass or bending strength up glass.

[0011]

EXAMPLES Hereinafter, the bending die for a glass plate according to the present invention will be specifically described with reference to examples. However, the present invention is not limited to the embodiment.

FIG. 1 is a perspective view of a partly enlarged main part showing a state in which a glass plate is deeply bent with a part of the glass plate cut out to explain an embodiment of the present invention. FIG. FIG. 3 is a perspective view of a main part of the bending mold for a glass plate of the present invention showing a state before being set, in which a part of the bending mold for a glass plate is cut away and omitted, and FIG. It is the whole perspective view shown.

The bending die 1 for glass plate is provided with a fixed portion 3 which supports the central portion of the glass plate 2 and is responsible for a gentle bending surface or horizontal surface processing, and swingably connected to the left and right sides of the fixed portion 3 respectively. The glass plate 2 is composed of a wing portion 4 which handles both sides of the glass plate up to bending deep bending, and the fixed portion 3 and the wing portion.
4 are respectively connected by the outer race 19 to the free arm 28 and the weight arm 21 and are arranged on the mold receiving frame 7, the support member 23 and the wing pipe 20, respectively, and the mold receiver 30 is placed on a mold carriage (not shown). Place on.

The fixed portion 3 which is horizontal or gently bent, and the wing portion which is bent in a U shape and which is connected to the fixed portion 3.
In both mold races 5 of 4 , the heat balance between the glass and the metal at the time of cooling, the flow of the cooling air, and the holes 18 are provided for the purpose of reducing the weight, and the mold race 5 has a tooth-shaped upper portion. A rod 29 for arranging the support portion 6 and swinging the wing portion 4 is rotatably supported on the fixed portion 3 by a rotary shaft 25,
A weight 24 is slidably provided at a tip portion of the rod 29 so that the weight 24 can be fixed at a predetermined position, and the weight 24 of the rod that rotates downward is fixedly attached to a lower portion of the fixing portion to be integrally connected to the mold receiving frame 7. The rod 29 is brought into contact with the member 23 to stop the rotation of the rod 29. On the other hand, the rear end of the rod 29 is integrated with the weight arm 21 by the fixing pin 27 so as to be freely movable with the weight arm 21. Are linked to.

In the fixing portion 3 near each of the left and right bending corner portions 14 of the bending die 1 , the hole portion 1 in the blade side area of the fixing portion 3 is provided.
A bracket 11 is rotatably raised by a rotating shaft 22 from a pillar 10 provided on a mold receiving frame 7 with 8 and a supporting member 23, and the bracket 11 is arranged at the tip of an arm 12 extending from the bracket to the wing side. , Bent corner 14
And the glass plate 2 directly above the tooth-shaped support portion 6 in the area.
The bar 8 provided with a pressing portion 15 for pressing the inner edge portion of the bending corner portion 14 of the
When the glass plate and a hook 9 which allowed to lock the fixation projecting enter freely and lock freely said bar mold race 5 and freely bent corner portion removably within range presser type 1
3 are arranged symmetrically at four positions in the wing side region of the fixed portion.

The hooks are inserted and locked manually or mechanically, for example, by nuts provided at both ends of a hollow body which is fixed to the mold race 5 and the like, and the hook is horizontally extended between the pair of bodies. Secure the hook 9 to the threaded connection body,
The screws provided at both ends of the connecting body may be loosely tightened with the nut.

Also, plate supporting portions 16 and 17 having a bent shape that matches the curvature of the bending corner portion of the glass plate are provided on both supporting portions at the relative ends of the fixed portion and the blade portion. further,
The bending corner portion and the area pressing inner die 13 are composed of a tooth-shaped pressing portion 15 and a supporting plate with holes for supporting, and the tooth-shaped pressing portion of the inner die is at least the bending corner portion 14.
The central part of the fixed part and the tooth-shaped support part 6 of the wing part and the plate support parts 16 and 17 are arranged so as to face each other,
Moreover, it is preferable that the plate support portion 16 on the fixed portion side is flat and the plate support portion 17 on the blade portion side is a bent shape surface that matches the curvature of the bent corner portion of the glass plate.

It is preferable that the tooth-shaped supporting portion and the pressing portion are floated from the glass surface by, for example, about 1 to 2 mm so as to be slightly inclined so as to come into contact with the edge portion of the glass plate. And, it brings about prevention of deterioration of strength or increase of strength.

The operation of the present invention will be described below. Bending die 1
Bending corner portion 1 of glass plate 2 placed on supporting portion 6 of
In FIG. 4 , the glass plate 2 is attached to the edge of the glass plate by using the mold carriage on which the bending mold 1 is mounted, which presses the pressing portion 15 of the inner mold 13 provided at the tip of the rotatable arm 12. Transfer into a furnace at a temperature to soften.

As the glass plate 2 softens, the weight 24
The weight of the rod 29 causes the weight side of the rod 29 to rotate downward, and the rotational moment of the rod 29 causes the blade 4 to be lifted up about the rotary shaft 25. On the other hand, the descending rod 29 is fixed to the fixed portion 3 as a supporting member. 23 on weight 24
But abuts but allowed to stop the rotation of the wings 4, 4 to bend the wings of the glass plate 2, a glass plate 2 around the bending corners 14 of the wings 4, required during the softening of the glass due to its too small area The warp rises due to the lack of its own weight or the deformation phenomenon of the curvature of the bending corner portion occurs, whereas the pressing portion 15 that contacts the edge portion of the glass plate 2, especially the inner and outer surfaces of the bending around the bending corner portion. When both sides of the blade are pressed against each other, pressure is applied to prevent warping of the edge of the glass plate and deformation of the bending corner, and the bending of the wing 4 is matched to the desired curvature on the right-angled side surface. When approaching as much as possible, a hook 8 provided via, for example, an adjusting member, which is fixed to the mold receiving frame 7 below the mold race 5 of the fixed portion, is engaged with the bar 8 which is horizontally extended between the brackets 11 to engage the shaft portion. The pivotable bracket 11 engages,
The glass plate 2 placed horizontally on the support 6 bends,
The weight of the pressing portion 15 that comes into contact with the edge portion of the glass plate 2, that is, the vertical load, reaches the fixing portion, the bending corner portion, and the wing portion as the bending progresses, but the pressing portion by the hook 9 that is locked to the bar 8 is used. Reference numeral 15 sequentially prevents the glass from being deformed by advancing the contact state with the edge of the glass plate 2.

By interlocking the pressing portion 15 in a sandwiched manner right above the support portion 6, the kink phenomenon at the edge portion is eliminated, and for example, the protrusion is adjusted by an adjusting member or the like, and the bracket 11
By adjusting the locking state of the hook 9 that engages with the bar 8 that extends horizontally, and if a slight gap is provided in the adjustment of the locking, a slight amount of the glass plate 2 placed on the support portion 6 can be adjusted. Sliding, that is, expansion / contraction of thermal expansion and contraction is also absorbed by the rotation of the bracket 11, and does not affect the product at all.
For example, it can be used for two laminated glasses.

For example, the minimum value of the curvature of the bent corner is about 15R on the outer surface and about 10R on the inner surface. For example, the pitch of the tooth-shaped supporting portions is about 15 mm.
The material of the supporting part is a heat resistant material such as SUS304, and the size of the supporting part is about 10 to 15 mm x 15 to 30 mm and the thickness is about
It is about 1.5 to 3.0mm, and 300mm x 3 for a glass plate.
The thickness is about 00 mm to 1200 mm x 700 mm, and the plate thickness is about 2 to 10 mm.

[0023]

As described above, according to the present invention,
In the bending of the glass sheet by its own weight, the insufficient bending corner portion and its area, in particular, the own weight of the portion is compensated by the load pressing of the pressing portion, and the self gravity is generated even in the deep bending of 60 ° or more, especially the bending corner portion itself. Gravity also prevents the deformation that occurs due to warpage and / or different curvature by fixing the pressing part so that it abuts against the edge of the glass plate, and the expansion and contraction of the edge of the glass plate due to thermal action also causes slight movement of the bracket. It has an excellent effect of improving the quality and yield of glass products such as strengthened or strengthened glass products, in particular, by absorbing them by simple rotation.

[Brief description of drawings]

FIG. 1 is a perspective view of a partially enlarged main part showing a deeply bent state of a glass plate, in which a part of the glass plate is cut away for explaining an embodiment of the present invention.

FIG. 2 is a perspective view showing a state before setting a glass plate and showing a main part of the bending mold for a glass plate of the present invention, which is partially cut away and is omitted.

FIG. 3 is an overall perspective view showing an outline of the entire bending die for a glass plate of the present invention. .

[Explanation of reference signs] 1 Bending die for glass plate 2 Glass plate 3 Fixed part 4 Wing part 6 Support part 8 Bar 9 Hook 11 Bracket 13 Inner mold 14 Bending corner part 15 Pressing part 16 Plate supporting part 17 Plate supporting part

Claims (2)

[Claims] 1. A mold for the fixed part and the wing part, wherein a fixed part in a central region for placing a glass plate on a mold carriage and a wing part in a side region swingably connected to the fixed part are arranged. In a bending mold for a glass plate, in which a supporting portion is provided on an upper portion of a race, a bracket is rotatably raised and protruded from a mold receiving frame in a wing side region of the fixed portion and a column provided on a supporting member. Then, at the tip of the arm extending from the bracket to the wing side, a bending corner portion and a pressing portion for pressing the bending corner portion of the glass plate and the edge portion inside the area directly above the supporting portion in the area. A bent corner portion that is provided on the glass plate and that is laterally provided in the bracket, and a hook that is fixed to the mold race and that can be inserted and fixed and that locks the bar is detachable on the glass plate Inner mold, Along with symmetrically arranging at four positions in the wing side area of the fixed part, both supporting parts of the relative ends of the fixed part and the wing part are plate supporting parts having a shape matching the curvature of the bent corner part of the glass plate. A bending mold for glass plates, which is characterized in that 2. The supporting portion is tooth-shaped, and the bending corner portion and the tooth-shaped pressing portion in the area holding portion are at least the central portion of the bending corner portion, and the teeth of the fixed portion and the wing portion. Bending so that the plate supporting portion on the fixed side is flat and the plate supporting portion on the wing side is aligned with the curvature of the bending corner of the glass plate. The bending die for a glass plate according to claim 1, wherein the bending die has a shape surface.