JPS6234968Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for positioning flat glass transported in a horizontal state during bending and forming.

There are two methods for manufacturing curved glass by bending and forming plate glass: a method of suspending and carrying out the plate glass with tongs etc. from a heating furnace, and pressing the carried out plate glass between molds in a vertical state, and a method of pressing the plate glass from the heating furnace in a horizontal state. This is then pressed between the upper and lower molds,
Alternatively, there is a method of forming the material using its own weight.

As an apparatus for continuously forming plate glass in a horizontal state, for example, an apparatus as shown in FIGS. 1 and 2 is used.

That is, an air table 2 is disposed at the lower part of the heating furnace 1, a bar-shaped conveying member 4 is attached to a chain 3 that circulates around the heating furnace 1, and the plate glass 5 on the air table 2 is moved by the conveying member 4. The sheet glass 5 is pushed to the rear end and conveyed through the heating furnace 1, during which time the sheet glass 5 is heated to near its softening point. The plate glass 5 that has been slid on the air table 2 by the conveying member 4 to near the exit of the heating furnace 1 is
Both corners of the rear end are held by a pair of shuttles 6, 6 that penetrate into the heating furnace 1, and the shuttles 6, 6
When the ring mold 8 surrounding the press bed 7 moves up, the plate glass 5 is lifted by the ring mold 8 and press-formed between it and the upper mold 9. There is.

However, when forming with the above-mentioned conventional forming apparatus, positioning is performed only by a pair of shuttles, which causes variations in the position of the glass sheet on the pressbed. For this reason, the bending accuracy is not stable, and the bending accuracy is particularly poor in deep bending portions, and in some cases, the plate glass may come off from the ring mold.

The present invention was developed to improve the above-mentioned problems in the conventional bending process. An object of the present invention is to provide a positioning device for molding plate glass that can obtain curved glass with excellent precision.

In order to achieve this purpose, the positioning device according to the present invention is such that the base end of the stopper is rotatably attached to a holder to which a molding ring mold is fixed, and the ring mold is fitted around the bed. At this time, the base end is rotated so that the tip of the stopper is positioned above the top surface of the bed near the front end of the bed, and the tip of the stopper is used to transport the bed onto the bed. The gist of the system is to position the front end of the glass sheet.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 5.

FIG. 3 is a perspective view of the positioning device according to the present invention applied to a press molding device, in which a support stand 11 is arranged on the right side (downstream side) of the air table 10 disposed in the heating furnace. A press bed 13 having a large number of heated air blow-off holes 12 is provided on the support base 11, and a pair of plate-shaped stoppers are provided on the support base 11 on the right side of the press bed 13, spaced apart in the width direction. 14, 14 are fixedly installed.

Further, a holder 15 is provided on the right side of the support base 11. This holder 15 consists of a pair of parallel side plates 1
6, 17, and a horizontal plate 18 installed between the tips of these side plates 16, 17 (the left end in the figure). As shown in the figure, a ring mold 20 that loosely fits around the press bed 13 is fixed via rods 19, 19. Further, the bases of a pair of crank-shaped stoppers 21 are rotatably attached to the horizontal plate 18, and as shown in FIG.
The crank-shaped stoppers 21, 21 are brought into contact with the plate-shaped stoppers 14, 14 provided in the press bed 1, and due to this contact, the crank-shaped stoppers 21, 21 are rotated upward, and the ring mold 20 is moved against the press bed 1.
3 and is in the press preparation state.
The tips of the crank-shaped stoppers 21, 21 are located near the front end of the press bed 13 and above the upper surface of the press bed 13.

On the other hand, rack rods 22 and 23 are attached to the side plates 16 and 17 of the holding body 15, and are parallel to these side plates 16 and 17, and pinions 24 and 25 rotated by a motor are engaged with these rack rods 22 and 23. ing. Parts of the rack rods 22, 23 engage with arm portions 30, 31 of intermediate bodies 28, 29 which are movable up and down along guide rods 26, 27,
The intermediate bodies 28 and 29 are raised and lowered by vertically running chains 34 and 35 to which the other arm parts 32 and 33 are connected. By rotating the pinions 24 and 25, the holding body 1
5 and the ring mold 20 fixed thereto move back and forth, and the intermediate bodies 28 and 29 move up and down, so that the holding body 15 and the ring mold 20 fixed thereto move up and down. Note that when the holding body 15 moves up and down, the rack rods 22 and 23
4 and 25, and the holding body 1
5 moves back and forth, the intermediate bodies 28, 29 move together with the rack bars 22, 23.

Further, in the space surrounded by the holder 15, a holder 37 for holding the glass plate 36, which is moved by a drive means of another system, is disposed, and the holder 37 for the glass plate 36 that has been rapidly cooled is
A belt device 38 is disposed on the right side of the holder 15 to receive the plate glass held by the holders 37 and convey it to a predetermined position.

Next, the operation of the press section constructed as described above will be explained below.

First, rotate the pinions 24 and 25 to release the holding body 1.
5 is moved toward the press bed 13, and the ring mold 20 fixed to the holder 15 is positioned between the press bed 13 and the upper mold 39. Thereafter, the intermediate bodies 28 and 29 are lowered, the holder 15 is lowered, and the ring mold 20 is fitted around the press bed 13. Along with this operation, the crank-shaped stoppers 21 and 2 are
1 comes into contact with a plate-shaped stopper 14 fixedly installed on the support base 11, and the crank-shaped stoppers 21, 21 rotate upward around the base end attached to the upper horizontal plate 18, and the tip end thereof contacts the press bed. It is stopped at a position above the upper surface of the press bed 13 near the front end of the ring mold 13 and not interfering with the front end of the ring mold 20.

From this state, the glass plate 36 on the air table 10 is pulled out onto the press bed 13 by the shuttles 40, 40, slides on the upper surface of the press bed 13, and its front end touches the crank-shaped stopper 2.
1 and 21, and due to this contact, the movement of the plate glass 36 is stopped, and the shuttles 40, 40 and stoppers 21, 21
The four corners are positioned by

When the positioning of the glass plate 36 is completed, the holding body 15 is raised via the intermediate bodies 28 and 29, and the ring mold 20 fixed to this holding body 15 is raised. As the ring mold 20 rises, the positioned glass plate 36
The peripheral edge of is precisely placed on the ring mold 20. When the ring mold 20 is further raised, the crank-shaped stoppers 21, 21 also rise and separate from the plate-shaped stoppers 14, 14, and the crank-shaped stoppers 21, 21 rotate downward by their own weight.
The tip thereof is located below the upper end of the ring mold 20. In this state, the plate glass 36 is press-molded with the upper mold 39 placed on the ring mold 20.

Immediately thereafter, the pinions 24 and 25 are rotated in the opposite direction to move the holder 15 forward in the conveying direction (to the right in FIG. 3), and the formed glass plate 3
6 is placed on the ring mold 20 and placed above the cooling air blowing nozzle, and the plate glass 36 is
Blow cooling air onto the area. Then, the cooling air passes between the glass plate 36 and the upper end of the ring mold 20, and rapidly cools and strengthens the glass plate 36.

Next, the four corners of the glass plate 36 are held by the holders 37, the glass plate 36 is taken up from the ring mold 20, and the glass plate 36 is transferred onto the conveyor belt 38, and the glass plate 36 is conveyed to the next process. Here, since the crank-shaped stoppers 21, 21 are lower than the upper end of the ring mold 20,
It does not get in the way of being picked up by the holder 37.

Although the illustrated example shows an example in which the positioning device according to the present invention is applied to a press molding device, the positioning device according to the present invention is a method in which the positioning device according to the present invention is applied to a plate glass heated to near its softening point on a ring mold. It can also be applied to a self-weight type molding device that uses its own weight to curve the ring mold to follow the shape of the ring mold.

As explained above, according to the present invention, the plate glass transported horizontally from the heating furnace is placed on the bed, and the plate glass is shaped by raising the ring mold fitted around the bed. In this apparatus, a stopper is rotatably attached to the holder to which the ring mold is fixed, and the tip of the stopper is located at the front end of the bed at the position where the ring mold is fitted around the bed, that is, at the preparation position for molding. Since the stopper is positioned above the top surface of the bed near the ring mold, it can be used with a conventional shuttle to position the four corners of the sheet glass on the bed.Furthermore, during molding and transportation, the stopper is located below the top of the ring mold. Therefore, it does not interfere with molding and transportation.

Therefore, it becomes possible to quickly and accurately place the plate glass on the ring mold, and it is possible to obtain a curved glass with excellent bending accuracy. It is particularly effective in manufacturing curved glass having deeply bent portions, such as automobile windshields.

[Brief explanation of the drawing]

The drawings show a conventional example and an embodiment of the present invention, and FIG. 1 is a side view of a conventional press molding apparatus;
Fig. 2 is a plan view of a conventional press molding device, Fig. 3 is a perspective view of the main parts of a press forming device to which the positioning device of the present invention is applied, and Fig. 4 shows the positional relationship between the ring mold and the stopper. FIG. 5 is a side view showing the operation of the ring mold and the stopper. In addition, in the drawing, 10 is an air table, 13 is a bed, 15 is a holding body, 20 is a ring mold, and 21
36 is a plate glass, and 40 is a shuttle.

Claims (1)

[Scope of utility model registration request] A bed on which the plate glass transported from the heating furnace is placed; a ring mold that is fixed to a holder that can be moved up and down and lifts and molds the periphery of the glass plate placed on the bed from below;
The proximal end is rotatably supported by the holder, and when the ring mold is fitted around the bed, the proximal end rotates and its distal end touches the bed near the front end of the bed. A positioning device for molding plate glass, characterized in that the stopper is located above the top surface of the plate glass.