JP2856635B2 - Method and apparatus for identifying glass plate mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for identifying a glass plate mold which is carried into a heating furnace and formed while moving, and a reading apparatus therefor.

[0002]

2. Description of the Related Art A flat glass plate is carried into a heating furnace via a bogie while being placed on a mold, and the glass plate is heated to a temperature near the softening point by moving in the furnace. Since the curved glass formed by copying is subjected to a sampling inspection for confirming a curved state in a process of being carried out of the heating furnace and moving, it is necessary to identify the mold.

For example, Japanese Patent Application Laid-Open No.
Japanese Patent Publication No. 159288 discloses a mold identification method and apparatus in which a molded dot mark is provided on the outer surface of a container to be a product to identify a mold, and the pattern of the dot mark is detected by a visual field optical device. For example, Japanese Patent Laid-Open No.
Japanese Unexamined Patent Publication No. 265376 discloses a parallel signal reading processing device in which a plurality of magnetic sensors arranged in parallel read a signal in which a parallel signal composed of a rectangular signal of a magnetic material such as a magnetic card is stored. I have.

[0004]

Problems to be Solved by the Invention
The prior art disclosed in Japanese Patent No. 59288 is for identifying which mold has been used when a defective product occurs during molding of a container. A projection of an identification mark is provided directly on the container of the product, and the laser spot light is applied to the identification mark. One of these is to irradiate from one direction, and the sensor of the light receiving unit recognizes the presence or absence of the mark. However, forming a glass plate, especially providing a mark of projections or depressions on the window glass for vehicles, is near the mark In addition to causing distortion, there are problems such as obstructing the field of view. In the latter JP-A-1-265376, the information storage medium is passed through a high-temperature furnace. There is a problem in use, such as being limited to magnetic fluctuations and heat-resistant materials.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a method and an apparatus for identifying a mold for a glass plate, which can reliably identify a mold formed of glass to be bent in a high-temperature heating furnace. Aim.

[0006]

According to the method of the present invention, a glass plate is placed on a mold fixed to a cart, sequentially sent into a heating furnace, bent in the heating furnace, and taken out of the heating furnace. A method of removing a glass plate by an unloading device, sending the removed glass plate to a subsequent process, returning the other mold to a circulation path together with a truck, placing another glass plate by a loading device, and sequentially bending the glass plate. In each of the trolleys, a different identification mark is provided, and the mark is read, and the glass plate sent to the subsequent process can be identified by a mold at a predetermined location, and the identification device is characterized in that: A glass plate mold identifying device for identifying a glass plate mold fixed to a carriage stopped at a predetermined position by passing through a heating furnace, wherein A plurality of dot marks each having a shape are arranged side by side, a plurality of proximity sensors matching the parallel pitch of the dot marks are provided in a frame that can be freely moved toward and away from the dot marks, and reading means for reading an electric signal emitted from the proximity sensor is provided. It is characterized by doing so.

[0007]

[Function] When bending a glass sheet, the glass sheet is placed on a bending mold carrier, passed through a high-temperature furnace, and bent by the heat. A sampling inspection is performed to determine whether the sheet is bent. There is no problem if the processed glass plate is within the standard.However, when the glass plate was out of the standard, there is a possibility that the glass plate was out of the specification due to a defect in the mold. It is necessary to know whether it has been molded in a mold.

According to the present invention, a plurality of dot marks each having a protruding shape are arranged in parallel on each of the carts, and a parallel pitch of the dot marks is provided in a frame that can be freely moved toward and away from the dot marks in a circulation path before the unloading device. By providing a plurality of proximity sensors that match with the sensor, and by providing reading means for reading an electric signal emitted from the proximity sensor, a glass plate that has been subjected to high temperature and bent by being exposed to a high temperature without forming a mark on the glass can be used in many molds. It is possible to identify which mold is used in the mold.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic explanatory view showing an embodiment of the present invention, FIG. 2 is a perspective view showing a main part showing a mold and a truck, and FIG. 3 is a schematic perspective view showing a truck on which the mold is fixed and a main part of a proximity sensor. .

As shown in FIGS. 1 to 3, reference numeral 1 denotes a heating furnace, in which a glass plate 4 is placed on a mold 3 fixed to a carriage 2 and sequentially sent into the heating furnace 1 by a furnace conveyor 5. It is bent in the heating furnace, sent out of the heating furnace by the post-furnace conveyor 6, the glass sheet is removed by the unloading device 7, the bent glass sheet is sent to the subsequent process by the take-out conveyor 8, and the mold is returned together with the carriage on the return conveyor. After returning to the circulation path by 9, another glass plate is placed on the loading device 10 and sequentially bent.

A dot mark 11 for reading a bogie number consisting of a plurality of plates made of heat-resistant paint, for example, iron or heat-resistant paint, or stainless steel, is attached to a lower or side surface of each bogie. For example, a plurality of proximity sensors 12 that match the parallel pitch of the dot marks on a frame that can be freely moved toward and away from the dot marks in the vicinity of separating the bent glass from the mold.
And a reading means 13 such as a sequencer for processing an electric signal emitted from the proximity sensor.

Since the proximity sensor 12 is for detecting the presence or absence of a dot mark provided on the mold 3 to process and identify the mold in a binary number, the proximity sensors 12 are juxtaposed at equal intervals, and the number is subjected to bending. The number is determined from the maximum number of molds that can exist in the circulation path. If the maximum number is n, the number of bits is x, which corresponds to the minimum value of x that satisfies the relationship 2 ^x ≧ n. Proximity sensor is required. The arrangement and number of dot marks for reading are unique to each other. For example, a proximity sensor is brought close to an operation position by a driving device (not shown) for such a mold provided as shown in FIG. It is output to the reading means as "0" or "0" if it is present or "1" if it is not present. If the 6-bit dot mark is used in the reading device as in the embodiment, 000000
To 111111 are converted into ordinary decimal numbers, and the numbers are converted from 0 to 63.

In practice, the predetermined location is extracted by the extraction conveyor 14 and the inspection place 15 is inspected for doubling, curvature, dimensions, etc., and when there is a defect, it is determined in which mold the extracted glass was formed. In this case, in this case, there are a plurality of bent glass pieces between the place read by the proximity sensor and the place to be extracted, so the bogie number is stored in correspondence with each glass plate, and the glass plate is stored. With the movement, the stored bogie number is shifted.

More specifically, the straight-moving conveyor 8 is driven each time the bent glass is separated from the mold and transferred to the straight-moving conveyor 8 in the unloading device. 1
If the signal read in step 2 is sequentially shifted to the memory of the reading device 13 every time,
It is possible to know in which mold the bent glass was formed.

In this case, the glass to be extracted is specified by the dot mark number of the mold that manufactured the glass,
When the glass molded with the mold of that number comes to the extraction place, it is extracted, the next time the glass molded with the mold with different dot mark number is extracted, the glass molded with the mold with different number is sequentially extracted, the number of molds It is preferable to make a round with the same number of samplings as described above, and to continue this sampling.

Although the preferred embodiments have been described above, the present invention is not limited to these, and various applications are possible. The sensor that reads the presence or absence of the dot mark provided on the mold may be an optical reader that combines a light emitter and a light receiver, but a proximity sensor that is simple and occupies a small area is preferable. If used, the pitch between sensors is 2
Since the distance can be reduced to about 0 mm, the size can be reduced. Further, the sensor may be made to approach from above, in addition to approaching the dot mark from under the mold, and may be made to approach from the lateral direction by changing the mounting position of the dot mark.

Further, in the embodiment, when a plurality of bent glass exists between the place read by the proximity sensor and the place to be extracted, the glass is cut off from the mold and transferred to the straight conveyor 8. According to the signal, the signal read by the proximity sensor 12 is sequentially shifted to the memory of the reading device 13 each time, and it is identified which mold the glass has been formed, but the glass is placed on the extraction conveyor 8 and transferred. Even if the glass plate is located between the place where the glass is read by the proximity sensor and the place where the glass is taken out with an optical device or the like that combines a projector and a receiver, the glass is similarly shifted in the memory of the reading device 13. Good.

[0018]

According to the identification method and apparatus of the present invention, there is no need to put any mark or the like on a glass plate, and it is possible to reliably identify a glass molding mold bent in a high-temperature heating furnace. Things.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a main part showing a mold and a cart according to the present invention.

FIG. 3 is a schematic perspective view showing a carriage to which a mold of the present invention is fixed and a main part of a proximity sensor.

[Explanation of symbols]

 Reference Signs List 1 heating furnace 2 cart 3 mold 4 glass plate 7 unloading device 10 loading device 11 dot mark 12 proximity sensor 13 reading device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-159288 (JP, A) JP-A-1-265376 (JP, A) JP-A-51-76548 (JP, U) (58) Survey Field (Int.Cl. ⁶ , DB name) C03B 23/00-23/26 C03B 35/00-35/26

Claims (2)

(57) [Claims] 1. A glass plate is placed on a mold fixed to a carriage and sequentially sent into a heating furnace, and bent in the heating furnace.
Remove the glass plate from the heating furnace, remove the glass plate with an unloading device, send the removed glass plate to the subsequent process, return the other mold with the carriage to the circulation path, place another glass plate with the loading device and bend sequentially A different identification mark is provided on each of the carts to be processed, and the mark is read, and the glass plate sent to the subsequent process can be identified by a mold at a predetermined place. How to identify the mold. 2. A glass plate is placed on a mold fixed to a carriage and sequentially sent into a heating furnace, and bent in the heating furnace.
It is sent out from the heating furnace, the glass plate is removed by the unloading device, the removed glass plate is sent to the subsequent process, the other mold returns to the circulation path together with the cart, and another glass plate is placed by the loading device and bent sequentially A plurality of dot marks each having a projecting shape are arranged in parallel on each of the carts to be processed, and a plurality of marks matching the parallel pitch of the dot marks are arranged on a frame that can be freely moved toward and away from the dot marks in a circulation path before the unloading device. An apparatus for identifying a glass plate mold, comprising: a proximity sensor; and reading means for reading an electric signal emitted from the proximity sensor.