JPH0630815Y2 - Plate glass positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an apparatus for positioning a sheet glass when bending the sheet glass carried out from a heating furnace.

(Prior Art) As a device for shaping bent glass such as automobile windshield, a press molding machine composed of upper and lower molds is arranged adjacent to a heating furnace, and a plate glass which is carried out from the heating furnace and is in a high temperature state is rolled. It has been known from the past that a conveyor conveys the material directly above the lower mold (ring mold) of the press molding machine, bends and molds the plate glass with a stopper and pusher at this position, and rapidly cools it if necessary. Has been.

(Problems to be Solved by the Invention) In the above-mentioned conventional apparatus, since the plate glass is positioned, the stopper or pusher comes into direct contact with the high temperature plate glass.

Since the stopper or pusher has a lower temperature than that of the plate glass, a crack is generated at the contacted portion, which also causes damage later and lowers the strength.

(Means for Solving the Problems) In order to solve the above problems, the present invention is designed to heat a contact member such as a stopper or a pusher of a positioning device that comes into contact with a plate glass in a high temperature state by a heater or the like, and to bracket the contact member. The rod cylinders are rotatably pivotally mounted on one of the rod tips, and the other rod tip is fitted with a roller that engages with a cam hole formed in the bracket.

(Operation) Since the stopper and the like that come into contact with the edge portion of the plate glass in a high temperature state are also high in temperature, cracks due to the temperature difference do not occur. Further, the contact member ascends against the edge of the glass sheet from the vertical direction while coming in contact with the edge of the glass sheet, and moves vertically away from the edge of the glass sheet and then descends.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of a bending and forming apparatus to which a plate glass positioning apparatus according to the present invention is applied, and FIG. 2 is a view in the direction of arrow AA in FIG. 1. The bending and forming apparatus is adjacent to a heating furnace 1. And a press molding machine 2 is provided.

The press molding machine 2 is composed of an upper mold 3 and a lower mold 4 which can be raised and lowered, and conveys the plate glass G heated up to near the softening point by being conveyed in the heating furnace 1 to the lower mold 4 by a conveying roller 5. , The stopper 6 positions the front end of the glass sheet G, and the pushers 7 are moved to the center to position the glass sheet in the left-right direction. Then, the positioned plate glass G is transferred onto the ring mold 8 and press-bend-molded by the upper mold 3 and the lower mold 4.

As for the sheet glass G that needs to be quenched and strengthened here, if the upper mold 3 and the lower mold 4 have a cooling jet function, they are quenched and strengthened in the same stage, and if they are not equipped, they are immediately subjected to the next step. To strengthen quenching.

By the way, the structure of the stopper 6 is the enlarged view of FIG.
As shown in FIG. 4 and FIG. 4 which is a view in the direction of arrow B in FIG. 3, a pair of brackets 10, 10 are fixed to a machine body of the molding machine 2, and a shaft 11 is interposed between the brackets 10, 10. A double rod type cylinder unit 12 is rotatably pivotally mounted, and a roller 16 is attached to a lower end of a piston rod 15 protruding from an upper surface of the cylinder unit 12, and the roller 16 is engaged with a cam hole 17 formed in the bracket 10. I am fit. Thus, when the position of the front end of the plate glass G is determined and the state shown in FIG. 3 is completed, air is supplied to the upper chamber of the cylinder unit 12 and the piston rods 12 and 15 are lowered. The roller 16 moves, and the cylinder unit 12 slightly rotates about the shaft 11 in the clockwise direction in FIG. As a result, as shown by the imaginary line in FIG. 3, the contact portion 14 moves down from the glass sheet G toward the front (to the right in the drawing) and moves downward, so that the front end portion of the glass sheet G is rubbed by the contact portion 14. Never.

FIG. 5 is a cross-sectional view showing the internal structure of the contact portion 14. The contact portion 14 has a nichrome wire 19 wound around a ceramic pipe 18, and the glass cloth 2 is placed on the nichrome wire 19.
It is covered with 0. With such a structure, the nichrome wire 19
By energizing the glass cloth 20 and raising the temperature of the glass cloth 20,
Even if the tip of the high temperature plate glass G comes into contact with the glass cloth 20, the edge portion of the plate glass G is not rapidly cooled and cracks are less likely to occur.

FIGS. 6 and 7 are views similar to FIG. 5 showing another embodiment. In the embodiment shown in FIG. 6, a gas burner 21 is arranged in the ceramic pipe 18 and shown in FIG. In the embodiment, the example is shown in which the gas burner 21 is arranged outside, but the heating means is not limited to this.

Further, in the illustrated example, the heating means for the contact portion 14 of the stopper 6 is shown, but the pusher 7 is also provided with the same heating means.

(Effects of the Invention) As described above, according to the present invention, when positioning the high-temperature plate glass carried out from the heating furnace, the stopper or pusher that is in direct contact with the plate glass is heated. The strength is significantly improved without causing fine cracks in the edge portion of the plate glass.

Further, since the contact member such as the stopper or the pusher is brought into contact with and separated from the plate glass end portion in the direction perpendicular to the plate glass end portion, the plate glass end portion is not rubbed by the contact member and is damaged. There is no.

[Brief description of drawings]

FIG. 1 is a front view of a bending apparatus to which a positioning device according to the present invention is applied, FIG. 2 is a view in the direction of arrow AA in FIG. 1, and FIG. 3 is an enlarged view of a main part of FIG. FIG. 4 is a view in the direction of arrow B in FIG. 3, FIG. 5 is a sectional view of a contact portion of a stopper, and FIGS. 6 and 7 are views similar to FIG. 5 showing another embodiment. In the drawings, 1 is a heating furnace, 2 is a press molding machine, 6 is a stopper, 7 is a pusher, 12 is a cylinder unit, 14 is a contact portion, 19 and 21 are heating means, and 20 is a glass cloth.

Claims (1)

[Scope of utility model registration request] 1. An apparatus for positioning a sheet glass brought into contact with a sheet glass carried out from a heating furnace, the apparatus comprising heating means for heating a contact member such as a stopper or a pusher which comes into direct contact with the sheet glass. Is attached to one rod tip of both rod cylinders pivotally attached to the bracket, and a roller engaging with a cam hole formed in the bracket is attached to the other rod tip, and the contact member is attached to the end of the plate glass. A device for positioning a plate glass, characterized in that the device moves upward and downward so as to come into contact with and separate from each other in the vertical direction.