JPH01278431A - Bending device of plate glass - Google Patents

Abstract

PURPOSE:To make possible to reduce heat loss and freely control bending speed by removing balance weight installed in rotating wing part and moving the rotating wing part with pressing part provided outside of heating furnace in the subject device having rotation wing part. CONSTITUTION:A plate glass is locally heated and softened with a heater 21 provided adjacent to a rotation axis 20 of a rotating wing 17 of a plate glass bending mold 16 in a heating furnace, the wing part 17 is rotated and the plate glass on the mold 16 is sharply bent. In said device, e.g., a pressing part 1 is provided in a casing 2 of said part is outside of the heating furnace. Pressing force of a pressing lever 15 in the pressing part is converted to rotation of the rotating wing part 17 with a parallel link 22 and the plate glass is bent. With said device, heat loss due to balance weight is reduced, bending speed is freely controlled according to softened degree of the plate glass, thickness of the glass, etc., and efficiency of the bending process is also improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for heating and softening sheet glass to sharply bend it.

(Prior art and its problems) Regarding bending of plate glass, for example, Japanese Patent Publication No. 57-255
As disclosed in No. 1, a balance weight is attached to the rotating blade part of a plate glass bending mold having a rotating blade part, and the rotating blade part is rotated by the action of gravity to bend the heated and softened plate glass. Something is publicly known.

In this method, the balance weight is housed in the furnace, so there is a heating loss. Also, if the balance weight is made lighter, it takes time to bend it, and if the negative balance weight is made heavier, the heating loss further increases, and in addition, the excessive weight may sometimes damage the glass.

The present invention solves these problems, eliminates the balance weight, places a pressing member that can adjust the pressing speed outside the furnace, and utilizes its action to rotate the rotary blade part of the mold and press the plate glass. A device for bending is provided.

(Means for Solving the Problems) The present invention provides a plate glass bending mold having a rotary blade section in a heating furnace, a heater for local heating disposed close to the rotation axis of the rotary blade section, and a rotary In a device that sharply bends a plate glass on a mold along a rotation axis by rotating a wing, the rotating wing is rotated by a pressing member placed outside the heating furnace via a pressure-rotation conversion mechanism. It is something that must be done.

In the present invention, the suppression member that acts on the rotary blade section uses an air cylinder as a source of suppression effect, or the rotational movement of a motor is controlled by a binion-rack mechanism or a feed screw mechanism to linearly
It is possible to adopt a method that converts the pressure into motion (pressure). However, in the case of an air cylinder, it is difficult to delicately control the suppression effect, and in the case of a binion-rack mechanism, there is play between the teeth of the binion and rack, making fine adjustment difficult, and the teeth wear out due to the application of pressing force. Since there are some problems such as ease of handling, it is preferable to adopt a feed screw mechanism using a ball screw that does not have these problems.

Considering ease of operation and simple and robust structure, the mechanism for converting the pressing force into rotation of the rotary blade section adopts a parallel link mechanism, which will be described later, and converts the pressing force into rotation of the rotary shaft. It is preferable to rotate the rotary blade portion fixed to the shaft.

(Example) The present invention will be described in detail below based on the accompanying drawings.

Figure 1 shows one of the pressing members arranged outside the heating furnace in the present invention.
This is a perspective view showing an example. Specifically, the pressing member is attached to the casing 2 on the side of the heating furnace.

A drive motor 4 and an overhanging fitting 5.5 are fixed to the furnace casing 2 via fittings 3.3.3. Overhang metal fitting 5
．． 5 are provided with rails 6.6, respectively, so that rolls 8.8 of the traveling member 7 can slide and travel freely.

FIG. 2 is a partial side view showing the state of engagement between the rail 6 of the projecting metal fitting and the roll 8 of the traveling member 7. As shown in the partial front view of FIG. 3, the running member 7 has a socket portion 9.9 screwed into the feed screw rod 10 (preferably a ball screw is used), and one end of the feed screw rod 10 rotates. By arranging the total number 11, the travel distance of the traveling member 7, which will be described later, can be visually checked from the amount of rotation thereof. A bevel gear 12 is arranged at the other end, and it is screwed together with a bevel gear 13 attached to the shaft of the motor 4, so that the rotation of the shaft (→A) is caused by the rotation of the feed screw 4110 (→B). ), and the socket portion 9, that is, the running member 7 is moved (-→C) by the feed screw mechanism. Note that the shaft of the motor 4 may be directly attached to the feed threaded rod 10.

The running member 7 is connected to a pair of pressing rods 15.1 via a connecting member 14.
5 (Fig. 1) are arranged and fixed together, and the pressing rod 15.
15 penetrates the furnace side wall and acts on the rotary blade portion 17 of the mold (2) in the furnace, as will be described later.

Figure 4 shows the mold ■ in the furnace and the pressing rod 15.1.
The mold (not shown) on which a plate glass is placed (not shown) is divided into a fixed part 18 and a rotary wing part (7), and the whole is supported by support rods 19 and 19.

The support rods 19.19 are further supported by a holding frame (not shown) and are transported in and out of the furnace by a chain or the like.

As for the conveying means, a conveying device filed by the present applicant on April 27, 1986, in which holding frames are mounted on chains parallel to each other on both sides of the furnace and conveyed by chain drive, is preferably used.

Rotating axis of rotating blade part 17.17 published by Mold 20.20-
and a heating line 21, 21, for example S
This is a parallel link mechanism in which an iC heating element is arranged and shows a preferred example of converting the bending part of the plate glass into rotation of the part 17, of which the side part 23.23- is a crank and rotates through the rotation shaft 20.20-. It is fixed and integrally fixed with the rotor blade part 17.17, and the side part 23.23- is tilted by pressing the pressing member pressing rod 15.15- against the side part 24.24-...→D), As the rotating shaft 20.20- rotates (→E), the rotating blade portion 17.17 fixed thereto rotates (-→F), thereby bending the glass plate.

At this time, there are cases where the unbent central part of the glass plate is slightly curved due to the bending action, and in order to prevent this, a so-called double prevention plate made of a ceramic fiber mat that is in surface contact with the bottom surface of the glass plate is installed near the center of the glass plate (not shown). It may be provided.

In addition, when pressing and rotating, if the pressing force is applied gradually at the beginning to rotate and bend slowly, and then the pressing speed is controlled to increase, the above-mentioned double occurrence can be suppressed, the glass will not break, etc., and the efficiency will be improved. Can be bent.

FIG. 5 is a front view showing another embodiment of the parallel link mechanism U, in which the pressing rod 15 comes into contact with a lever 26 attached to the shaft 25 and presses it.

A tilting stopper 27 of the side 23 is attached to the rear of the side 2j of the support rod 19, and is stopped when a predetermined angle is reached.

Further, a locking piece 29 is rotatably supported on the support rod 19 via a mounting piece 28, and the locking piece 29, which was resting on the side 30 before bending, collapses in the direction of the arrow (→G) due to rotation. , when rotated by a predetermined angle, the hooking piece 2 is attached to the shaft notch 31 of the side part 23.
It is formed so that the claw portion 32 of No. 9 is latched.

Therefore, the plate glass can be bent to a precisely specified angle, then maintained at that angle without the support of a pressing rod, and then gradually cooled or soaked and rapidly strengthened to complete the product.

The present invention is configured and operates as described above, and the motor for pressing can be adjusted to rotate slowly or rapidly, so that the pressing or bending speed can be freely controlled depending on the softening degree and thickness of the sheet glass, and the bending process can be performed. It also improves efficiency.

(Effects of the Invention) According to the present invention, the conventionally known balance weight can be eliminated to reduce the heat loss caused by it, and the bending speed can be freely controlled according to the softening degree and thickness of the sheet glass, thereby increasing the bending processing efficiency. It also has the effect of improving

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the pressing member in the present invention, the second and third
The figures are a partial side view and a front view, FIG. 4 is a perspective view showing the relationship between the pressing rod and the mold, and FIG. 5 is a front view showing another embodiment of the parallel link mechanism. Top---One pressing member 15---One pressing rod------
Mold 17---Rotating blade part U---Parallel link Fig. 1

Claims (1)

[Claims] (1) A plate glass bending mold having a rotating blade part in a heating furnace, and a heater for local heating placed close to the rotation axis of the rotating blade part, and the plate glass on the mold being bent by the rotation of the rotating blade part. A device for sharply bending a plate glass along a rotation axis, characterized in that the rotating blade portion is rotated by a pressing member disposed outside the heating furnace via a pressure-rotation conversion mechanism. Device.