JPS639552Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a positioning device for positioning a glass plate immediately before the glass plate is press-formed between a convex mold and a concave mold.

BACKGROUND ART There are two conventional methods for forming curved glass such as automobile window glass: self-gravity forming and press forming. As shown in FIG. 1, in press forming, a plate glass 2 whose upper end is suspended by hangers 1, 1 is heated in a heating furnace to near its softening point, and then taken out of the heating furnace in a vertical position. The press surface 3 is conveyed to between the press surfaces 3a and 4a of the convex mold 3 and the concave mold 4, and the convex mold 3 and the concave mold 4 are clamped.
It is designed to be molded to imitate the shapes of a and 4a.

In such conventional press forming, since the plate glass 1 is suspended so as to face between the press surfaces 3a and 4a, the positions of the plate glass 1 and the press surfaces 3a and 4a are not constant, Furthermore, during pressing, the timing and position of contact between the sheet glass 1 and the pressing surface cannot be accurately regulated. For this reason, there is a problem in that the bending accuracy cannot be improved, and the bending accuracy deteriorates particularly in deep bending portions.

The present invention was developed in view of the conventional problems mentioned above, and its purpose is to accurately position the glass plate during press forming, thereby making it possible to obtain curved glass with excellent bending accuracy. To provide a positioning device for press molding of plate glass.

In order to achieve the above object, the plate glass press molding positioning device according to the present invention positions the plate glass facing between the convex and concave press surfaces by a positioning member that comes into contact with a guide member during the mold clamping operation. Further, the gist is that the contact state between the positioning member and the guide member is released after the plate glass is held between the molds.

An example of the implementation of the present invention will be described below based on FIGS. 2 to 6.

FIG. 2 is a side view showing a conveying means for sheet glass when press-forming is performed using the positioning device according to the present invention. A balance plate 13 is swingably attached to the support plate 12 by means of a hook 14. Tongs 15, 15 are attached to both ends of the balance plate 13, and these tongs 15, 15 suspend and support both sides of the upper end of a vertically long triangular glass plate 16.

By using a conveying device with such a structure, even when a positioning member (described later) is applied to the glass plate 16 and the position of the glass plate 16 is changed, the glass plate 16 easily moves, and unreasonable force is not applied to the hanging portion, etc. Therefore, local deformation etc. can be prevented.

FIG. 3 is a plan view of a press section to which the positioning device according to the present invention is applied, and the plate glass 16 transported by the above-mentioned transport device faces between the pressing surfaces 17a and 18a of the convex mold 17 and the concave mold 18. I'm here.
Further, the position of the plate glass 16 is slightly shifted to the right in FIG. 3.

Furthermore, positioning devices 19, which are the gist of the present invention, are provided on both sides of the convex mold 17 and the concave mold 18. This positioning device 19 consists of a positioning member 20 and a guide member 21.

As shown in FIG.
It is pivotably attached to the tip of a bracket 23 attached to the bracket 23, and the tip has a bifurcated portion.
One of the forked parts is a Teflon rod 24 that contacts the plate glass 16, and the other of the forked parts is a rod 25 bent downward from the middle part. Further, a coil spring 26 is stretched between the positioning member 20 and the rear end of the bracket 23, so that the positioning member 20 is normally stopped at the position shown in FIG.

On the other hand, the guide member 21 has a plate shape, and its mold 1
The sides on the 7 and 18 sides are inclined cam sides 21a. The guide member 21 is attached to the side of the convex mold 17 via a rod 27.

A press molding process using the positioning device configured as above will be described below.

First, from the state shown in FIG. 3, the convex mold 17 and the concave mold 1 are
When the mold clamping operation is started so that the parts 8 come closer to each other, the positioning member 20 and the guide member 21 come closer together with this operation. Then, as the mold clamping operation continues, the lower end 25a (see FIG. 4) of the rod 25 of the positioning member 20 comes into contact with the cam side 21a of the guide member 21, as shown in FIG.
moves along the cam side 21a. Then, as the rod 25 moves, the positioning member 20 rotates clockwise while pulling the spring 26 in FIG. Due to this rotation, the Teflon rod 24 is attached to the plate glass 1.
6 and move the plate glass 16 to a predetermined position.

Then, when the mold clamping operation is further continued, the plate glass 1 already positioned by the positioning member 20
6 is held between a convex mold 17 and a concave mold 18 as shown in FIG. Further, at this time, the rod lower end 25a of the positioning member 20 is set to be located at the rear end of the cam side 21a or slightly in front of the rear end. Therefore, when the plate glass 16 is held between the convex mold 17 and the concave mold 18, the contact between the rod lower end 25a of the positioning member 20 and the cam side 21a is released approximately at the same time or slightly later. Then, as shown by the imaginary line in FIG. 6, the positioning member 20 rotates counterclockwise, and the Teflon rod 24 separates from the glass plate 16. This rear plate glass 16 is formed by pressing surfaces 17 of the convex mold 17 and the concave mold 18.
A and 18a are press-molded into a predetermined shape.

In the illustrated example, a pair of positioning devices 19, 19 are arranged on the left and right sides of the convex mold 17 and the concave mold 18, but the number of positioning devices 19 is arbitrary. In particular, when press forming a vertically long triangular plate glass 16 as shown in FIG.
3 is transmitted as a large swing to the lower part of the plate glass 16, it is preferable to arrange a pair of positioning devices at the upper left and right sides of the convex mold 17 and the concave mold 18, and one or two positioning devices at the lower part. In this way, the number of positioning devices provided is arbitrary.

Further, in the illustrated example, the positioning member 20 and the guide member 21 are attached to either the convex mold 17 or the concave mold 18 and are linked to the movement of the mold, but one or both of the positioning member and the guide member Instead of being attached to the mold, it may be operated separately by a driving means such as a cylinder. In short, the positioning of the glass plate 16 may be completed before the glass plate 16 is press-molded between the molds 17 and 18.

As explained above, according to the present invention, the position of the plate glass conveyed between the molds is adjusted by the positioning member that comes into contact with the guide member as the mold closes. It is possible to accurately align the plate glass and the press surface, improving bending accuracy. In addition, after the glass plate is held between the molds, the contact between the positioning member and the guide member is released at the same time or a little later, so that no excessive force is applied to the glass plate after positioning. do not have. Therefore, the bending accuracy can be further improved. In particular, according to the positioning device of the present invention, it is possible to accurately position glass plates of vertically long or triangular shapes, which were problems in the past, and it has many effects, such as making it possible to curve deeply bent parts with high precision. .

[Brief explanation of the drawing]

The drawings show conventional examples and embodiments, and FIG. 1 is a perspective view of a conventional press molding device, and FIG. 2 is a diagram of a conveying device for conveying plate glass to a press molding device to which the positioning device according to the present invention is applied. 3 is a plan view of a press molding device to which the same positioning device is applied, FIG. 4 is a side view of the positioning device, and FIG. 5 is a side view of the positioning device.
This figure and FIG. 6 are plan views similar to FIG. 3, which illustrate the operation of the positioning device. In addition, in the drawing, 16 is a plate glass, 17 is a convex type, and 18 is a plate glass.
17a and 18a are press surfaces, 19 is a positioning device, 20 is a positioning member, and 21 is a guide member.

Claims (1)

[Claims for Utility Model Registration] (1) A positioning member that positions a plate glass that is conveyed between the convex and concave press surfaces and is suspended and supported by contacting the edge of the plate glass and moving in the horizontal direction. , comprising a guide member with which the positioning member comes into contact with the mold clamping operation, and the contact state between the positioning member and the guide member is released after the plate glass is held between the molds. Positioning device for press forming of plate glass. (2) Claim 1 of the utility model registration characterized in that the positioning member is attached to one of the convex and concave shapes, and the guide member is attached to the other of the convex and concave shapes. Positioning device for press forming of plate glass.